关于水泥土搅拌桩复合地基载荷试验的探讨

通过试验结果的对比,讨论了地基土含水量变化对水泥土搅拌桩复合地基承载力的影响,建议采用＂10 mm厚的水泥砂浆对整个试验场地进行封闭保护＂来减低其影响。通过2个典型试验场地试验结果的对比分析,讨论了按现行规范规定确定复合地基承载力特征值可能存在的问题;建议进行破坏性试验,先定极限荷载,然后再根据＂先评价复合地基均匀性、再根据安全系数确定承载力＂的原则确定复合地基的承载力。

Discussion on Load Test in Composite Ground of Concrete Mixed Pile

By the comparison of test results,discussion was made on the effect of variation of subbed soil water content to the test result and suggestion was made to closely protect the test field with 10 mm cement mortar;by the comparison of test results of 2 typical test fields,discussion was made on the possibility of characteristic value of composite ground bearing capacity and suggestion was made to have destructive test,determine ultimate load first and than define the bearing capacity of composite ground by the principle.