基于孔压静力触探测试的改进分层总和法在软基沉降预测中的应用研究

分层总和法在高速公路软基沉降的预测中得到了广泛的应用。然而，由于基于钻探的土层划分往往比较粗糙以及基于室内试验的压缩模量确定不太可靠，导致沉降预测与实际偏差较大。孔压静力触探（CPTU）作为一种新型的多功能原位测试技术，可以同时测试得到锥尖阻力、侧壁摩阻力和孔压沿深度的连续剖面，较好地改善这一状况。以连盐高速公路为研究实例，采用多变量统计分析中的最优分割理论，基于CPTU高精度测试数据对土层进行了精细划分，并通过实际沉降观测资料的反演分析确定了基于CPTU的压缩模量计算方法，进而通过对高速公路实测沉降和CPTU预测沉降的比较，验证了文中计算方法的有效性

Settlement prediction of soft ground by modified layerwise summation method based on piezocone tests

The layerwise summation method is widely used for predicting settlement of soft ground in highway construction practice.However,the results of predicted settlement often show bad match with the real monitoring settlement due to the low reliability of soil profiling and compression modulus predicting,solely based on the boring tests and laboratory tests.Therefore,the piezocone testing(CPTU) is especially useful for soil investigation of soft soils and settlement prediction,which can provide three continuous ...