十字板剪切试验在珠三角深厚软土基坑工程中的应用

摘要

由于淤泥的结构性较强，被扰动后其强度会大幅下降，故通过常规的室内试验得到的淤泥的强度参数一般都偏低，往往导致基坑支护过于保守，该文尝试采用闫澍旺等人提出的根据十字板剪切试验测得的峰值抗剪强度，推导出淤泥的强度参数，对基坑支护设计进行优化，这一方法在实际基坑工程中成功运用，说明该方法可行，可供类似工程参考。%Due to the high structure, the strength of silt will substantially reduce when it's being disturbed.So the silt's strength pa-rameter of indoor tests is often lower than the intrinsic one.Thus, resulting in over-conservative design value in foundation pit sup-port.To solve this problem, peak shear strength measured by vane shear test to derivate the strength parameter of the silt which was proposed by YAN Shuwang and etc.It is successfully used in practical foundation pit engineering show that this way is feasible.This provides reference for similar engineering.