土体应力状态分析及水压力计算  

Study on Stress State of Soil and Calculation of Earth and Water Pressure

作　　者：宋征[1] SONG Zheng(College of Science and Technology,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学科技学院,湖北宜昌443002

出　　处：《成都大学学报（自然科学版）》2020年第4期427-431,共5页Journal of Chengdu University（Natural Science Edition）

摘　　要：土压力在工程中的重要性一直是土力学中研究的主要课题.经典理论因计算简单常用于工程设计,但其假定条件的局限性使计算结果不符合实际情况.以二向应力状态为基础,推导了土压力分布应力的一般表达式,结合经典理论的假定条件分析了土体应力状态的影响,计算结果的对比说明了本方法的合理性.基于渗透力的概念对水土压力的计算进行了思考,渗透力以正向推动力和切向拖拽力影响土骨架的应力状态,算例分析结果表明:水土压力计算与孔隙率和渗流有关,分算结果偏大,而合算中应力状态具有不合理性.The importance of soil pressure in engineering is the main topic in soil mechanics.Due to its simplicity,the classical calculation theories are often used in engineering design,but because of the limitation of the condition,the calculation results cann t conform to the actual situation.This paper,based on biaxial stress states,deduces the soil pressure distribution,and analyzes the stress state of soil under the assumption condition of classical theories.The reasonableness of the method in this paper is proved based on the result of calculation.The comparison of the calculation results proves the reasonability of the method mentioned in this paper.The researchers ponder on the calculation of the soil and water pressure based on the concept of seepage force which influences the stress states of soil skeleton through positive impetus and tangential drag force.The analysis shows that the calculation of soil and water pressure is related to porosity and seepage.The figure for the separately estimated water and earth pressure is large and that for the combined estimated water and earth pressure is irrational in stress states.

关 键 词：二向应力状态 土压力 水土分算 水土合算 

分 类 号：TU432[建筑科学—岩土工程]