水位升降引起的砂土孔隙压力变化特性  

Characteristics of sand pore pressure changes caused by the rise and fall of water level

作　　者：王朝阳 王俊刚[1] 徐仁宇 姚鑫 李一凡 WANG Chaoyang;WANG Jungang;XU Renyu;YAO Xin;LI Yifan(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《山东理工大学学报（自然科学版）》2022年第2期77-80,共4页Journal of Shandong University of Technology:Natural Science Edition

摘　　要：孔隙压力对土的力学性能和变形特性都有影响。利用自研设备对无载和加载工况升降水位过程砂性土中的孔隙压力变化进行了监测,获得了砂性土孔隙压力变化的一些规律。水位上升和下降引起的孔隙压力路径不重合;水位上升时孔隙压力零点在测点或测点以上,水位下降时孔隙压力零点在测点以下;加载试验中,与同条件不加载情况相比,孔隙正负压力均增加,增加值与附加应力在趋势上一致。Pore pressure has an impact on the mechanical properties and deformation characteristics of soil.We used self-developed equipment to monitor the pore pressure changes in sandy soil during the process of rising and falling water levels under unloaded and loaded conditions.The pore pressure changes in sandy soil were monitored and some laws of sandy soil pore pressure changes were obtained.The pore pressure paths caused by the rise and fall of the water level do not coincide.When the water level rises,the pore pressure zero point is at or above the measuring point,and when the water level drops,the pore pressure zero point is below the measuring point.Both the positive and negative pressures of the pores in the loading test and the unloading test increase,and the increased value is in consistent trend with the additional stress.

关 键 词：孔隙压力 地下水位升降 荷载 

分 类 号：TU411[建筑科学—岩土工程]