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1 问题的提出在目前国内的岩土工程勘察工作中,提取土样,进行土工试验,利用试验结果配合规范提取地层单元的地基承载力是常用和重要的方式。而取样方式无外乎钻机取样和探井、探槽取样两种。探井、探槽所取土样基本能达到Ⅰ级土样,具有较好的代表性,而钻机取样则会或多或少地对试样产生扰动,多为Ⅱ级土样。日常工作中,受场地地层、取样深度或工期等的影响,许多工程往往无法采用探井、探槽方式取样,而必须利用钻机取样的试验结果提取地层承载力。那么,钻机取样对土工试验
1 PROBLEM PROBLEM In the current geotechnical investigation work in China, it is a common and important way to extract soil samples and carry out geotechnical tests. It is a common and important way to extract the bearing capacity of ground based on the test results and specifications. The sampling method is nothing less than the drilling rig sampling and exploration wells, trench sampling two. Exploration wells, trenches taken soil samples can reach Ⅰ grade soil samples, has a good representation, and rig sampling will be more or less the sample perturbation, mostly grade Ⅱ soil samples. In daily work, many projects are often unable to take exploratory wells and trenches for sampling due to site strata, sampling depth or duration, and the bearing capacity of drilling rigs must be extracted by using the sampling results of drilling rigs. Well, rig sampling on the geotechnical test