非饱和岩土广义有效应力原理的水气土压力的统一计算  

Unified Calculation of Hydro Pneumatic Earth Pressure Based on Generalized Effective Stress Principle of Unsaturated Rock and Soil

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

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：《科技风》2021年第36期88-90,共3页

摘　　要：笔者根据非饱和岩土水平截面的力平衡原理,引入岩土给水度参数,分析孔隙水压力作用力、大气压力作用力、土骨架传递力三者之间的关系,推导出水平截面上的孔隙水平均应力、大气平均应力和土骨架应力,提出了非饱和岩土广义有效应力原理的水气土压力统一计算方法,进而从理论上推导出考虑大气压力条件下的非饱和岩土侧向静止水气土总压力。希望能对非饱和岩土基坑支护计算有所帮助。According to the force balance principle of unsaturated geotechnical horizontal section,the author introduces the geotechnical water yield parameter,analyzes the relationship between pore water pressure force,atmospheric pressure force and soil skeleton transfer force,and deduces the pore horizontal average stress,atmospheric average stress and soil skeleton stress on the horizontal section,A unified calculation method of hydro pneumatic earth pressure based on the generalized effective stress principle of unsaturated rock and soil is proposed,and then the total lateral static hydro pneumatic earth pressure of unsaturated rock and soil considering atmospheric pressure is deduced theoretically.It is hoped that it can be helpful to the support calculation of unsaturated rock and soil foundation pit.

关 键 词：非饱和岩土 给水度 孔隙水压力 大气压力 土骨架传递力 统一计算 水气土总压力 

分 类 号：U451[建筑科学—桥梁与隧道工程]