用变形模量计算黄土自重湿陷量方法探讨

Exploring on Calculation of Self-weight Collapse Settlement of Loess Taking Advantage of Deformation Modulus

采用室内试验计算法与现场试坑浸水试验所得到的黄土自重湿陷量存在较大差异,故提出依据变形模量计算黄土自重湿陷量的方法,并用实际工程对该算法进行验证。用变形模量计算黄土自重湿陷量为333. 6 mm,野外试坑浸水试验的实测值为380. 5 mm,两者接近。从工程的角度而言误差较小,说明该计算方法有一定的理论价值。自重湿陷底界深度是计算中的重要参数,其测试比较困难,论文对其研究方法提出了建议。

The self-weight collapse settlement of the loess based on the lab test is different from the result of the in-situ soaking test.Thus,a method based on deformation modulus is proposed in this paper,and this method is verif ied through the application into actual engineering program.The self-weight collapse settlement of the loess based on deformation modulus is 333.6 mm while that measured based on the soaking f ield test is 380.5 mm.These two values are close.From the aspect of engineering,the error is small,verifying the theoretical value of the method.The lower limit depth of the collapsible loess is an important parameter and it is very diff icult to test.Suggestion on the research on this parameter is provided in this paper.