ASTM D 2850-03a
粘性土不固结不排水三轴压缩试验标准试验方法
1.Scope
1．范围
1.1 This test method covers determination of the strength and stress-strain relationships of a cylindrical specimen of either undisturbed or remolded cohesive soil. Specimens are subjected to a confining fluid pressure in a triaxial chamber. No drainage of the specimen is permitted during the test. The specimen is sheared in compression without drainage at a constant rate of axial deformation (strain controlled).
1.1 这个试验方法适用于确定圆柱形试样的强度与应力－应变关系，该样品可以是原状的或者是扰动的粘性土样。试样受到来自于压力室的一个限制变化压力的影响。在试验期间不允许试样排水。这个试样在不排水压缩的情况下被剪切的，轴向压力应控制在一个恒定速率下进行。
1.2 This test method provides data for determining undrained strength properties and stress-strain relations for soils. This test method provides for the measurement of the total stress applied to the specimen, that is, the stress are not corrected for pore-water pressure.
1.2 这个试验方法为确定土在不排水强度条件下与应力－应变的关系提供数据。这个试验提供给测定施加在试样上的总压力，当然，这个压力不是修正的孔隙水压力。
1.3 All obrved and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D 6026.
1.3 所有的观测和计算值应遵从在D6026中确定的重要数位和舍入方法的指导方针。水龙吟登建康赏心亭
春节的古诗词1.3.1 The method ud to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which the data can be applied in design or other us, or both. How one applies the results obtained using this standard is beyond its scope.
呆若木鸡造句
1.3.1 这个方法用于详细说明怎样收集数据，计算数据，或者记录数据。在这个标准下记录的数据与应用于设计或其他用途的数据精度没有直接关系。
1.4 The values stated in SI units are to be regarded as the standard. The values stated in inch-pound units and given in parenthesis are approximate.
1.4 在国际单位制中规定的数据被认为是标准的。在英制单位中和在圆括号里的数据是近似数据。
1.5 This standard does not purport to address all of the safety concerns, if any associated with its u. It is the responsibility of the ur of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to u.
1.5 这个标准不能用于声称是向一切关于安全方面的致辞，或者任何有关于它的使用。制定适当的安全和健康实践活动与调整其局限性的适用范围是这个标准使用者的职责。
2. Referenced Documents
2.相关的文件
2.1 ASTM Standards:
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2.1 ASTM 标准
D 422 Method for Particle-Size Analysis of Soils
D 653 Terminologry Relating to Soil, Rock, and Contained Fluids
D 854 Test Method for Specific Gravit)r of Soils
D 1587 Method for Thin-Walled Tube Sampling of Soils
D 2166 Test Methods for Unconfined Compressive Stt}ength of Cohesive Soil
D 2216 Test Method for Laboratory Determination of Water (Moisture) Content of Soil and Rock
D 2487 Classification of Soils for Engineering Purpos
家庭群名称D 2488 Practice for Description and Identification of Soils (Visual-Manual Procedure)
D 3740 Practice for Evaluation of Agencies Engaged in the Testing and/or Tnspection of Soil and Rock as Ud in Engineering Design and Construction
D 4220 Practices for Prerving and Transporting Soil 小美人鱼图片Samples
D 4318 Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils
D 4753 Specification for Evaluating, Selecting, and Specifying Balances and Scales for U in Testing Soil and Rock, and Related Construction Materials
D 4767 Test Method for Consolidated-Undrained Triaxial昆凌姐姐 Compression Test on Cohesive Soils
D 6026 Practice for Using Significant Digits in Geotechnical Data
3. Terminology
3.专业术语
3.1 Definitions-The definitions of terms ud in this test method shall be in accordance with Terminology D 653.
3.1 定义-用于这个试验方法术语的定义应该于D 653术语学相一致。
3.2 Definitions of Terms Specific to This Standard:
3.2 针对此标准的术语定义：
3.2.1 failure学位认证官网--the stress condition at failure for a test specimen. Failure is often taken to correspond to the maximum principal stress difference (deviator stress) attained or the principal stress difference (deviator stress) at 15% axial strain, whichever is obtained first during the performance of a test.
3.2.1 破坏----一个试样在一个压力条件下的破坏。破坏经常与达到最大主应力差，或者在15%轴向压力下达到主应力差相一致，任何一个值都是在开始试验后最先获得的值。
3.2.2 unconsolidated-undrained compressive strength--the value of the principal stress difference (deviator stress) at failure.
3.2.2 不固结不排水压缩强度――主应力差在破坏时的值。
4. Significance and U
4. 意义和应用
4.1 In this test method, the compressive strength of a soil is determined in terms of the total stress, therefore, the resulting strength depends on the pressure developed in the pore fluid during loading.
