K30试验在深圳地铁岩土工程勘察中的应用

研究目的：通过深圳地铁3号线现场K30试验方法,对比分析K30试验与标准贯入试验、旁压试验、室内试验等测试结果,探索各测试结果间的关联,以期供类似工程勘察借鉴。研究方法：运用K30试验方法,测试土层基床系数,并与标准贯入试验、旁压试验、室内试验等测试结果进行对比分析。研究结论：K30试验稳定性较好,地基土的基床系数宜采用K30试验方法获取;在实际勘察过程中,当不具备进行K30试验条件时,建议采用标准贯入试验、旁压试验近似代替K30试验,将测试结果结合规范及工程经验修正后提供设计;室内试验测取得的基床系数（Kv）比K30试验测得的基床系数（Kv）偏小,不宜直接提供设计。

Application of K30 Test Method in Engineering Survey of Rock-soil for Shenzhen Metro

Research purposes:Based on the site K30 test method used for Line 3 of Shenzheng Metro,the comparisons and analyses of the test result of K30 test with standard lateral pressure penetration test,pressure-meter test and indoor test are made for the purpose of seeking the relations among them so as to provide the reference to the similar engineering survey.Research methods:The K30 test method is adopted to test the bed coefficient of subgrade soil and the comparisons and analyses of the test result of K30 test with standard lateral pressure penetration test,pressure-meter test and indoor test are made.Research conclusions:The stability K30 test is better,so it is suitable to use K30 test method to test the bed coefficient of subgrade soil.However,when there is no condition to do K30 test,it is suggested to adopt standard lateral pressure penetration test,pressure-meter test and indoor test.The tests results should be modified with the standards and experience because the bed coefficient of subgrade soil obtained from indoor test is smaller than that from K30 test.