土石混填料应力波试验方法与工程应用研究

摘要

The shear wave test of small size mixture with standard compaction and the shear wave test of large size mixture with vibration compaction were conducted with sandy soil-stone mixture and clay soil-stone mixture.The data of shear wave velocity of mixture was collected in different water content,dif-ferent stone content and different dry density.The change rule of shear wave velocity of mixture was re-vealed.By comparative analyzing of two kinds of test data and the studying of project example,the preci-sion of test results were analyzed.The results show that the relative error between shear wave test data of large size mixture and actual one was 0.25%,the test results’stability was better and the dispersion was smaller.the relative error between shear wave test data of small size mixture and actual one was 1.4%, and the test results’stability was poor.The high precision of simulation test of shear wave velocity in field soil-stone foundation could be obtained by shear wave test of large size mixture.And the results of shear wave test with small size mixture could be changed upon this relative error.%针对砂土混填料和粘土混填料两种土石混填材料，分别开展室内小尺寸标准击实剪切波测试试验及大尺寸振动击实剪切波测试试验，采集不同含水率、不同含石量、不同干密度条件下混填料剪切波速相关数据。研究混填料剪切波速的变化规律，并通过二者试验数据的对比分析，结合工程实例对试验结果进行精确性研究。结果表明：在现场施工质量严格控制下，室内大尺寸土石混填试件剪切波速测试与实际相对误差约为约为0.25％，测试结果较稳定，数据离散性较小。而小尺寸土石混填试件剪切波速测试与实际相对误差约为1.4％，且数据稳定性较差，对现场土石混填地基剪切波速模拟试验建议采用大尺寸振动压实制备试件，但在缺乏大尺寸混填试件试验条件时，室内标准击实剪切波速测试结果可据此误差进行调整。