铁道标准设计2017，Vol.61Issue(2)：29-33,5.DOI:10.13238/j.issn.1004-2954.2017.02.007
地震荷载下土体应力分析与挡土墙土压力计算分析
Stress Analysis of Soil Mass and Calculation of Retaining Wall Pressure under Seismic Load
袁小飞1
作者信息
- 1. 铁道第三勘察设计院集团有限公司，天津 300251
- 折叠
摘要
Abstract
Under seismic load, the designed retaining wall based on quasi-static method as specified by current norms still experiences many kinds of damages. In order to probe how the stress distribution under seismic load influences the seismic resistance of geotechnical projects and to acquire the proper anti-seismic design of retaining walls, this paper uses quasi-static method to describe the seismic load and deduces the formula of the strength and the direction of earth’s principal pressure under seismic load based on the theory of elastic mechanics and the assumption that the issue meets the plane-strain condition. The analysis of the stress circle of the spot is conducted to obtain the calculation method for the strength of dynamic soil pressure and the depth of crack in the soil. The results show that:(1) positive and negative seismic earth pressure coefficients increase while the internal friction angle increases; ( 2 ) cohesive strength has no effect on positive seismic earth pressure, but has small effect on negative seismic earth pressure; ( 3 ) the depth of the crack in the soil increases with the increase of the internal friction angle and the cohesive strength.关键词
挡土墙/地震荷载/拟静力法/应力/土压力Key words
Retaining wall/Seismic load/Pseudo-static method/Stress/Earth pressure分类
交通工程引用本文复制引用
袁小飞..地震荷载下土体应力分析与挡土墙土压力计算分析[J].铁道标准设计,2017,61(2):29-33,5.
