饱和土有效应力原理下的水土压力分算和合算的统一计算  

Unified calculation of water and soil pressure based on the principle of effective stress of saturated soil

作　　者：王国义 蒋宗全 Wang Guoyi;Jiang Zongquan(PowerChina Chengdu Construction Investment Co.,Ltd.,Chengdu 610212,China)

机构地区：[1]中电建成都建设投资有限公司,四川成都610212

出　　处：《山西建筑》2020年第11期4-7,共4页Shanxi Architecture

摘　　要：基坑支护中的水土压力计算一直困扰岩土工程界,对于"水土分算"与"水土合算"存在许多争议。根据饱和土的几项参数,对太沙基的有效应力原理理论分析,推导出饱和土的总应力、土骨架应力(有效应力)和水应力(中和应力)三者之间的关系公式。通过推导出来的水土压力计算新公式对现今典型土的水土压力进行计算,计算出的值与实际基本相符,实现了"水土分算"与"水土合算"的统一计算,水土压力计算都是在饱和土有效应力原理下的"水土分算"。希望能对理论土力学的发展和基坑支护的水土压力计算有所帮助。The calculation of soil and water pressure in foundation pit support has been puzzling the geotechnical engineering field,there are many controversies on the calculation of water and soil pressure. Based on several parameters of saturated soil,the author makes a theoretical analysis of Terzaghi’s effective stress principle. The relationship among total stress,soil skeleton stress(effective stress) and water stress( neutral stress) of saturated soil is derived. Based on the new calculation formula of soil and water pressure,the soil and water pressure of modern soil is calculated,and the calculated value is basically consistent with the actual value. The formula realizes the unified calculation of water and soil division and water and soil calculation. The calculation of water and soil pressure is based on the formula of saturated soil stress. It is hoped to be helpful to the development of theoretical soil mechanics and the calculation of soil and water pressure of foundation pit support.

关 键 词：水土压力 有效应力原理 水应力 水土分算 

分 类 号：TU443[建筑科学—岩土工程]