岩土工程学报2012，Vol.34Issue(7)：1333-1337,5.
有限填土静止土压力系数计算方法研究
Coefficient of at-rest earth pressure from limited backfill
贾宁1
作者信息
- 1. 中国电力工程顾问集团华北电力设计院工程有限公司,北京100120
- 折叠
摘要
Abstract
Based on the concept of mobilized angle of internal friction, the coefficient of at-rest earth pressure from limited coarse backfill K0 is obtained after the analysis of the Molar＇s cycle. A comparison is made with Jaky＇s formula for half infinite soil mass K0j and active earth pressure from limited backfill Ka . It is found that K0 is close to or smaller than Koj, when the internal friction angle between the rock face and backfill φ is equal to that of backfill φ. K0 is not only influenced by φ and inclination of the rock face, but also by δr ; K0 may be larger or smaller than Koj, when δr is smaller than φ ; K0 and Ka decrease with the increase of the inclination of the rock slop; and K0 is larger thanKa . To make the rock face rough and to adopt bench excavation are both effective methods to reduce the at-rest earth pressure from the limited backfill. A design graph is given at the end of the paper.关键词
有限填土/莫尔圆/静止土压力系数/已激发内摩擦角Key words
limited backfill/Mohr's cycle/coefficient of at-rest earth pressure/mobilized angle of internal friction分类
建筑与水利引用本文复制引用
贾宁..有限填土静止土压力系数计算方法研究[J].岩土工程学报,2012,34(7):1333-1337,5.
