D04 基础标准与通用方法 标准查询与下载

ASTM D5995-98 寒冷区域现场环境特性的标准指南

1.1 Use this guide in conjunction with Guide D 5730. 1.2 This guide describes special problems to be considered when planning field investigations in cold regions. The primary focus of this guide is presenting the special problems and concerns of site characterization in the cold regions of the world. 1.3 Laboratory testing of soil, rock and ground-water samples is specified by other ASTM standards that are not specifically discussed in this guide. Laboratory methods for measurement of physical properties relevant to environmental investigations are included in Guide D 5730. 1.4 The values stated in SI units are to be regarded as the standard. 1.5 This guide emphasizes the care that must be taken by all field personnel during operations in tundra and perma-frost areas of the world. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Guide for Environmental Site Characterization in Cold Regions

ASTM D5994-98(2003) 织物状地幔测量芯厚度的标准试验方法

Thickness is one of the basic index properties used to control and track the quality of many geomembranes. Additionally, many mechanical properties (for example, tensile yield strength, puncture strength, etc.) can be related to core thickness. Core thickness values may also be required in calculation of some parameters such as diffusion coefficients or tensile stresses. The measured core thickness of geomembranes may vary considerably depending on the pressure applied to the specimen during measurement. To reduce variation in measurements and the chance of unrealistically low values due to excessively high pressures, a specific gage point geometry and applied force are prescribed in this test method. The test method is applicable to all commonly available textured geomembranes that are deployed as manufactured geomembrane sheets.1.1 This test method covers a procedure to measure the core thickness of textured geomembranes. 1.2 This test method does not provide thickness values for geomembranes under variable normal stresses.

Standard Test Method for Measuring Core Thickness of Textured Geomembrane

MT/T 675-1997 露天煤矿边坡模拟试验方法

Slope simulation test method for open-pit coal mine

MT/T 645-1997 煤矿用带式输送机滚筒与相邻槽形.托辊组之间的距离计算公式

本标准规定了煤矿用带式输送机滚筒与相邻槽形托辊组之间的距离计算公式。 本标准适用于煤矿用带式输送机，也适用于选煤等作业场所用带式输送机滚简与相邻槽形托辊组之间的距离计算。

Conveyor belts.Formula for transition distance on three equal length idler rollers.For coal mining

JIS M 8121:1997 矿石中铜含量的测定方法

この規格は，鉱石中の銅定量方法についで規定する。

Methods for determination of copper in ores

ASTM D6145-97 检测分水界沉积的标准指南

1.1 Purpose- This guide is intended to provide general guidance on a watershed monitoring program directed toward sediment. The guide offers a series of general steps without setting forth a specific course of action. It gives advice for establishing a monitoring program, not an implementation program.

Standard Guide for Monitoring Sediment in Watersheds

ASTM D6145-97(2007) 检测分水界沉积的标准指南

This guide is intended to be used in the planning stage or phase of developing a sediment monitoring program. This guide is an assembly of the components common to all aspects of watershed sediment monitoring and fulfills a need in the development of a common framework for a better coordinated and a more unified approach to sediment monitoring in watersheds. The user of this guide is not assumed to be a trained technical practitioner in the water quality, sedimentation, or hydrology fields. The intended users are managers and planners who need information to develop a water quality monitoring program or project with an emphasis in sediment and hydrology. Sediment specialists will also find information on procedures, equipment, methodology, and operations to conduct a monitoring program. This guide is used during the planning process of developing, designing, and reevaluating a sediment monitoring program.1.1 Purpose8212;This guide is intended to provide general guidance on a watershed monitoring program directed toward sediment. The guide offers a series of general steps without setting forth a specific course of action. It gives advice for establishing a monitoring program, not an implementation program.1.2 Sedimentation as referred to in this guide is the detachment, entrainment, transportation, and deposition of eroded soil and rock particles. Specific types or parameters of sediment may include: suspended sediment, bedload, bed material, turbidity, wash load, sediment concentration, total load, sediment deposits, particle size distribution, sediment volumes and particle chemistry. Monitoring may include not only sediments suspended in water but sediments deposited in fields, floodplains, and channel bottoms.1.3 This guide applies to surface waters as found in streams and rivers; lakes, ponds, reservoirs, estuaries, and wetlands.1.4 Limitations8212;This guide does not establish a standard procedure to follow in all situations and it does not cover the detail necessary to define all of the needs of a particular monitoring objective or project. Other standards and guides included in the reference and standard sections describe in detail the procedures, equipment, operations, and site selection for collecting, measuring, analyzing, and monitoring sediment and related constituants.1.5 Additional ASTM and US Geological Survey standards applicable to sediment monitoring are listed in Appendix X1 and Appendix X2. Due to the large number of optional standards and procedures involved in sediment monitoring, most individual standards are not referenced in this document. Standards and procedures have been grouped in the appendices according to the type of analyses or sampling that would be required for a specific type of measurement or monitoring.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Guide for Monitoring Sediment in Watersheds

ASTM D6146-97 检测分水界水溶氮的标准指南

1.1 Purpose- This guide is intended to provide general guidance on a watershed monitoring program directed toward the plant nutrients nitrogen and phosphorus. The guide offers a series of general steps without setting forth a specific course of action. It gives assistance for developing a monitoring program but not a program for implementing measures to improve water quality.

Standard Guide for Monitoring Aqueous Nutrients in Watersheds

ASTM D6213-97(2003) 液体地理坐标耐化学药品评价的标准操作规程

This practice is intended to provide a list of standard procedures for test programs investigating the chemical resistance of a geogrid to a liquid. This practice should be used in the absence of other specifications required for the particular situation being addressed. This practice is intended to provide a basis of standardization for those wishing to compare or investigate the chemical resistance of a geogrid. It should be recognized that chemical resistance is a user judgment evaluation and that this practice does not offer procedures for interpreting the results obtained from test procedures contained in this practice. As a practice, this does not produce a test result. This practice is for the chemical resistance assessment of geogrids and is written in parallel to similar practices for geomembranes, geotextiles, geonets, and geopipes. Each practice is to be considered individually for the geosynthetic under investigation and collectively for all geosynthetics exposed to the potentially harsh chemical environment under consideration.1.1 This practice covers the procedures for testing of geogrids for chemical resistance to liquids. 1.2 This practice describes methods for measuring changes in physical and mechanical properties caused by immersion in test solution that may be representative of anticipated end-use conditions. 1.3 This practice describes procedures for required and recommended testing of geogrids. 1.4 Evaluation or interpretation of test data is beyond the scope of this practice. 1.5 This practice is intended to be used in conjunction with D 5322, or D 5496, or both. The scope of this practice is limited to testing and reporting procedures for unexposed and exposed geogrid coupons. 1.6 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 7.

Standard Practice for Tests to Evaluate the Chemical Resistance of Geogrids to Liquids

ASTM D6146-97(2007) 检测分水界水溶氮的标准指南

The user of this guide is not assumed to be a trained technical practitioner in the water quality field. The guide is an assembly of the components common to all aspect of watershed nutrient monitoring and fulfills a need in the development of a common framework for a better coordinated and a more unified approach to nutrient monitoring in watersheds. Limitations8212;This guide does not establish a standard procedure to follow in all situations and it does not cover the detail necessary to meet all of the needs of a particular monitoring objective. Other standards and guides included in the references describe the detail of the procedures.1.1 Purpose8212;This guide is intended to provide general guidance on a watershed monitoring program directed toward the plant nutrients nitrogen and phosphorus. The guide offers a series of general steps without setting forth a specific course of action. It gives assistance for developing a monitoring program but not a program for implementing measures to improve water quality.1.2 This guide applies to waters found in streams and rivers; lakes, ponds, and reservoirs; estuaries; wetlands; the atmosphere; and the vadose and subsurface saturated zones (including aquifers). This guide does not apply to nutrients found in soils, plants, or animals.1.3 Nutrients as used in this guide are intended to include nitrogen and phosphorus in dissolved, gaseous, and particulate forms. Specific species of nitrogen include: nitrate, nitrite, ammonia, organic, total Kjeldahl, and nitrous oxide. The species of phosphorus include total, total dissolved, organic, acid-hydrolyzable, and reactive phosphorus as described in ()1.4 Safety8212;Health and safety practices developed for a project may need to consider the following:1.4.1 During the construction of sampling stations:1.4.1.1Drilling practices during monitoring well installations,1.4.1.2 Overhead and underground utilities during monitoring well drilling,1.4.1.3 Traffic patterns/concerns during sampling station installation,1.4.1.4 Traffic patterns/concerns during surveying sampling station locations and elevations,1.4.1.5 Drilling through materials highly contaminated with fertilizers, and1.4.1.6 Installing monitoring equipment below the soil surface.1.4.2 During the collection of water samples:1.4.2.1 Using acids for sample preservation,1.4.2.2 Sampling during flooding events and ice conditions,1.4.2.3 Traffic on bridges,1.4.2.4 Condition of sampling stations following flood events,1.4.2.5 Sampling of water or soils, or both, highly contaminated with fertilizers,1.4.2.6 Conditions of sampling stations resulting from vandalism,1.4.2.7 Adverse weather conditions, and1.4.2.8 Transporting liquid samples.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Guide for Monitoring Aqueous Nutrients in Watersheds

ASTM D6145-97(2002) 检测分水界沉积的标准指南

1.1 Purpose-This guide is intended to provide general guidance on a watershed monitoring program directed toward sediment. The guide offers a series of general steps without setting forth a specific course of action. It gives advice for establishing a monitoring program, not an implementation program.1.2 Sedimentation as referred to in this guide is the detachment, entrainment, transportation, and deposition of eroded soil and rock particles. Specific types or parameters of sediment may include: suspended sediment, bedload, bed material, turbidity, wash load, sediment concentration, total load, sediment deposits, particle size distribution, sediment volumes and particle chemistry. Monitoring may include not only sediments suspended in water but sediments deposited in fields, floodplains, and channel bottoms.1.3 This guide applies to surface waters as found in streams and rivers; lakes, ponds, reservoirs, estuaries, and wetlands.1.4 Limitations-This guide does not establish a standard procedure to follow in all situations and it does not cover the detail necessary to define all of the needs of a particular monitoring objective or project. Other standards and guides included in the reference and standard sections describe in detail the procedures, equipment, operations, and site selection for collecting, measuring, analyzing, and monitoring sediment and related constituants.1.5 Additional ASTM and US Geological Survey standards applicable to sediment monitoring are listed in Appendix X1 and Appendix X2. Due to the large number of optional standards and procedures involved in sediment monitoring, most individual standards are not referenced in this document. Standards and procedures have been grouped in the appendices according to the type of analyses or sampling that would be required for a specific type of measurement or monitoring.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Guide for Monitoring Sediment in Watersheds

ASTM D6171-97(2004) 地下水模型规程文件化的标准指南

Ground-water modeling has become an important methodology in support of the planning and decision-making processes involved in ground-water management. Ground-water models provide an analytical framework for obtaining an understanding of the mechanisms and controls of ground-water systems and the processes that influence their quality, especially those caused by human intervention in such systems. Increasingly, models are an integral part of water resources assessment, protection, and restoration studies and provide essential and cost-effective support for planning and screening of alternative policies, regulations, and engineering designs affecting ground-water (1).4 Successful ground-water management requires that decisions be based on the use of technically and scientifically sound methods for data collection, information processing, and interpretation, and that these methods are properly integrated. As computer codes are essential building blocks of modeling-based management, it is crucial that before such codes are used as planning and decision-making tools, their performance characteristics are established and their theoretical foundation, capabilities, and use documented. Good code documentation ensures scientific rigor and implementational quality in the development of a code (2). Complete and well-written documentation shortens the learning curve for new users, provides answers to questions from project managers, and supports efficient code selection. Well-structured and indexed documentation provides rapid answers for initiated users. This guide is intended to encourage comprehensive and consistent documentation of a ground-water modeling code. Earlier surveys of computer models and assessment of specific models indicate that the documents that are supposed to describe and explain these models and their use are lacking in detail, inconsistent in their contents, incomplete with respect to user instructions, inefficient with respect to indexing and structure, and often difficult to obtain (3). This still applies to the documentation of many of the ground-water modeling programs recently released or frequently used (4).1.1 This guide covers suggested components of the documentation of a ground-water modeling code. Documentation of a ground-water modeling code consists of textual and graphical information recorded during its design, development, and maintenance regarding its capabilities, development history, theoretical foundation, operation, and verification. It is the principal instrument for those involved in its development and use, such as code development and maintenance staff, network managers, code users, and project managers, to communicate regarding all aspects of the software.1.2 This guide presents the major steps in preparing the documentation of a ground-water modeling code. It discusses the various documentation audiences and addresses the role of printed documentation versus documentation in electronic form.1.3 This guide is one of a series of guides on ground-water modeling codes and their applications, such as Guides D 5447, D 5490, D 5609, D 5610, D 5611, and D 5718.1.4 This guide is not intended to be all inclusive. If offers a series of options and considerations, but does not specify a course of action. Documenting certain codes may require supplemental information or replacement of documentation sections by more appropriate elements. This guide should not be used as a sole criterion or basis of comparison, and does not replace or relieve professional judgement in preparing or evaluating documentation of ground-water modeling software.1.5 This standard does not purport to address all of the safety concerns, if any, associated with i......

Standard Guide for Documenting a Ground-Water Modeling Code

ASTM D6213-97 液体地理坐标耐化学药品评价的标准操作规程

1.1 This practice covers the procedures for testing of geogrids for chemical resistance to liquids. 1.2 This practice describes methods for measuring changes in physical and mechanical properties caused by immersion in test solution that may be representative of anticipated end-use conditions. 1.3 This practice describes procedures for required and recommended testing of geogrids. 1.4 Evaluation or interpretation of test data is beyond the scope of this practice. 1.5 This practice is intended to be used in conjunction with D 5322, or D 5496, or both. The scope of this practice is limited to testing and reporting procedures for unexposed and exposed geogrid coupons. 1.6 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 7.

Standard Practice for Tests to Evaluate the Chemical Resistance of Geogrids to Liquids

ASTM D6146-97(2002) 检测分水界水溶氮的标准指南

1.1 Purpose8212;This guide is intended to provide general guidance on a watershed monitoring program directed toward the plant nutrients nitrogen and phosphorus. The guide offers a series of general steps without setting forth a specific course of action. It gives assistance for developing a monitoring program but not a program for implementing measures to improve water quality. 1.2 This guide applies to waters found in streams and rivers; lakes, ponds, and reservoirs; estuaries; wetlands; the atmosphere; and the vadose and subsurface saturated zones (including aquifers). This guide does not apply to nutrients found in soils, plants, or animals.1.3 Nutrients as used in this guide are intended to include nitrogen and phosphorus in dissolved, gaseous, and particulate forms. Specific species of nitrogen include: nitrate, nitrite, ammonia, organic, total Kjeldahl, and nitrous oxide. The species of phosphorus include total, total dissolved, organic, acid-hydrolyzable, and reactive phosphorus as described in (2)1.4 Safety8212;Health and safety practices developed for a project may need to consider the following:1.4.1 During the construction of sampling stations:1.4.1.1 Drilling practices during monitoring well installations,1.4.1.2 Overhead and underground utilities during monitoring well drilling,1.4.1.3 Traffic patterns/concerns during sampling station installation,1.4.1.4 Traffic patterns/concerns during surveying sampling station locations and elevations,1.4.1.5 Drilling through materials highly contaminated with fertilizers, and1.4.1.6 Installing monitoring equipment below the soil surface.1.4.2 During the collection of water samples:1.4.2.1 Using acids for sample preservation,1.4.2.2 Sampling during flooding events and ice conditions,1.4.2.3 Traffic on bridges,1.4.2.4 Condition of sampling stations following flood events,1.4.2.5 Sampling of water or soils, or both, highly contaminated with fertilizers,1.4.2.6 Conditions of sampling stations resulting from vandalism,1.4.2.7 Adverse weather conditions, and1.4.2.8 Transporting liquid samples.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Guide for Monitoring Aqueous Nutrients in Watersheds

ASTM D6025-96(2002) 制定和评估地下水模式准则的标准指南

Ground-water modeling has become an important methodology in support of the planning and decision-making processes involved in ground-water management. Ground-water models provide an analytical framework for obtaining an understanding of the mechanisms and controls of ground-water systems and the processes that influence their quality, especially those caused by human intervention in such systems. Increasingly, models are an integral part of water resources assessment, protection, and restoration studies and provide essential and cost-effective support for planning and screening of alternative policies, regulations, and engineering designs affecting ground water. It is therefore important that before ground-water modeling codes are used as planning and decision-making tools, their credentials are established and their suitability determined through systematic evaluation of their correctness, performance characteristics, and applicability. This becomes even more important because of the increasing complexity of the hydrologic systems for which new modeling codes are being developed. Quality assurance in ground-water modeling provides the mechanisms and framework to ensure that the analytic tools used in preparing decisions are based on the best available techniqu1.1 This guide covers a systematic approach to the development, testing, evaluation, and documentation of ground-water modeling codes. The procedures presented constitute the quality assurance framework for a ground-water modeling code. They include code review, testing, and evaluation using quantitative and qualitative measures. This guide applies to both the initial development and the subsequent maintenance and updating of ground-water modeling codes.1.2 When the development of a ground-water modeling code is initiated, procedures are formulated to ensure that the final product conforms with the design objectives and specifications and that it correctly performs the incorporated functions. These procedures cover the formulation and evaluation of the code's theoretical foundation and code design criteria, the application of coding standards and practices, and the establishment of the code's credentials through review and systematic testing of its functional design and through evaluation of its performance characteristics.1.3 The code's functionality needs to be defined in sufficient detail for potential users to assess the code's utility as well as to enable the code developers to design a meaningful code testing strategy. Comprehensive testing of a code's functionality and performance

Standard Guide for Developing and Evaluating Ground-Water Modeling Codes

DIN EN 933-2:1996 集料几何特性试验.第2部分:粒度分布测定.筛孔公称尺寸

Test for geometrical properties of aggregates - Part 2: Determination of particle size distribution; test sieves, nominal size of apertures; German version EN 933-2:1995

ASTM D6031-96(2004) 在水平、倾斜和垂直通道管中用原子核法对渗出土壤和岩石的潮气含量和密度测定的标准试验方法

This test method is useful as a repeatable, nondestructive technique to monitor in-place density and moisture of soil and rock along lengthy sections of horizontal, slanted, and vertical access holes or tubes. With proper calibration in accordance with Annex A1, this test method can be used to quantify changes in density and moisture content of soil and rock. This test method is used in vadose zone monitoring, for performance assessment of engineered barriers at waste facilities, and for research related to monitoring the movement of liquids (water solutions and hydrocarbons) through soil and rock. The nondestructive nature of the test allows repetitive measurements at a site and statistical analysis of results. The fundamental assumptions inherent in this test method are that the dry bulk density of the test material is constant and that the response to fast neutrons and gammaray energy associated with soil and liquid chemistry is constant.1.1 This test method covers collection and comparison of logs of thermalized-neutron counts and back-scattered gamma counts along horizontal or vertical air-filled access tubes. 1.2 The in-situ water content in mass per unit volume and the density in mass per unit volume of soil and rock at positions or in intervals along the length of an access tube are calculated by comparing the thermal neutron count rate and gamma count rates respectively to previously established calibration data. 1.3 The values stated in SI units are regarded as the standard. The inch-pound units given in parentheses may be approximate and are provided for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazards, see Section 6.

Standard Test Method for Logging In Situ Moisture Content and Density of Soil and Rock by the Nuclear Method in Horizontal, Slanted, and Vertical Access Tubes

ASTM D5980-96(2004) 用于环境位点特性和探测的现有井的选择和文件编制的标准指南

This guide describes a general approach for the use of existing wells in environmental investigations with a primary focus on the subsurface and major factors affecting the surface and subsurface environment. Existing wells represent a valuable source of information for subsurface environmental investigations. Specific uses of existing wells include: 4.2.1 Well driller logs provide information on subsurface lithology and major water-bearing units in an area. Existing wells can also offer access for downhole geophysical logging for stratigraphic and aquifer interpretations. Examples include natural gamma logs in cased wells and an entire suite of methods in uncased bedrock wells (see Guide D 5753). This information can assist in developing the preliminary conceptual model of the site. 4.2.2 Well tests using existing wells may provide information on the hydrologic characteristics of an aquifer. 4.2.3 Monitoring of water levels in existing wells, provided that they are cased in the aquifer of interest, allow development of potentiometric maps and interpretations of ground-water flow directions. 4.2.4 Existing wells are the primary means by which regional drinking water quality is evaluated and monitored. 4.2.5 Existing wells may assist in the mapping of contaminant plumes, and in ongoing monitoring of ground-water quality changes at the site-specific level. Data from existing wells should only be used when characteristics of the well have been sufficiently documented to determine that they satisfy criteria for the purpose for which the data are to be used.1.1 This guide covers the use of existing wells for environmental site characterization and monitoring. It covers the following major topics: criteria for determining the suitability of existing wells for hydrogeologic characterization and ground-water quality monitoring, types of data required to document the suitability of an existing well, and the relative advantages and disadvantages of existing large- and small-capacity wells.1.2 This guide should be used in conjunction with Guide D 5730, that provides a general approach for environmental site investigations.1.3 This guide does not specifically address design and construction of new monitoring or supply wells. Refer to Practices D 5092 and D 5787.1.4 This guide does not specifically address ground-water sampling procedures. Refer to Guide D 5903.1.5 The values stated in SI units are to be regarded as the standard. However, dimensions of materials used in the water well industry are given in inch-pound (English) units by convention; therefore, inch-pound units are used where necessary in this guide.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.1.7 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This guide cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This guide is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this guide be applied without consideration of a project''s many unique aspects. The word "Standard" in the title of this document means only that the document has been approved through the ASTM consensus process.

Standard Guide for Selection and Documentation of Existing Wells for Use in Environmental Site Characterization and Monitoring

ASTM D6031-96 在水平、倾斜和垂直通道管中用原子核法对渗出土壤和岩石的潮气含量和密度测定的标准试验方法

1.1 This test method covers collection and comparison of logs of thermalized-neutron counts and back-scattered gamma counts along horizontal or vertical air-filled access tubes. 1.2 The in-situ water content in mass per unit volume and the density in mass per unit volume of soil and rock at positions or in intervals along the length of an access tube are calculated by comparing the thermal neutron count rate and gamma count rates respectively to previously established calibration data. 1.3 The values stated in SI units are regarded as the standard. The inch-pound units given in parentheses may be approximate and are provided for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazards, see Section 6.

Standard Test Method for Logging In Situ Moisture Content and Density of Soil and Rock by the Nuclear Method in Horizontal, Slanted, and Vertical Access Tubes

ASTM D6026-96 在土工学数据中使用明显数字的标准实施规程

1.1 This practice is intended to assist in the use of uniform methods of indicating the number of digits that are to be considered significant and rounding for intermediate calculations when reporting geotechnical test results. 1.2 This practice uses a variation of the traditional rounding method (see Practice E 29) that recognizes the algorithm common to most hand-held calculators.

Standard Practice for Using Significant Digits in Geotechnical Data