冲击荷载下饱和软土动态响应特征的试验研究  

Experimental study on dynamic characteristics of saturated soft clay under impact loading

作　　者：孟庆山[1] 汪稔[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学重点实验室,湖北武汉430071

出　　处：《岩土力学》2005年第1期17-21,共5页Rock and Soil Mechanics

基　　金：湖北省自然科学基金(2004ABA024);中国科学院武汉岩土力学研究所博士科研启动基金资助项目(Q220302)。

摘　　要：基于现场动力排水固结法加固饱和软土地基工程实践和室内动力固结试验,结合土体压力分析了饱和软粘土在冲荷载作用下的变形与孔压的发展变化规律。研究表明:冲击荷载引起土体变形和激发的孔压具有不同发展模式,土体变形冲击击数是对数双曲线关系,而孔压与冲击击数之间仅是双曲线关系。Based on in site test of soft clay foundation treated with dynamic consolidation by drainage and dynamic consolidation tests in lab, the dynamic characteristics of strain and pore water pressure of soft clays under impact loading were analyzed associated with soil pressures. The study has shown that the axial strain and pore water pressures with impact number have different development models. The relationship between axial strain and impact number is of hyperbolic-logarithm function, and the development model between pore water pressure and impact number is of hyperbolic function.

关 键 词：冲击荷载 饱和软土 轴向变形 孔压 

分 类 号：TU413.5[建筑科学—岩土工程]