摘要
为了计算黄土状填土震陷后涵顶竖向土压力,提出一种考虑涵洞侧面涵土摩阻力的填土竖向土压力计算方法,并基于该方法,利用黄土震陷量的预测公式,推导出震陷后涵顶竖向土压力计算公式.分析了填土高度、填土模量以及填土起始动应力对震陷后涵顶竖向土压力的影响.结果表明:随着填土高度的增加,震陷后涵顶竖向土压力先增大后减小;填土模量越大,对涵洞在地震荷载作用下的安全越不利;随着填土起始动应力的增大,震陷后涵顶竖向土压力系数逐渐减小.
In order to calculate the vertical earth pressure on the top of the culvert after seismic sub- sidence, a method to calculate the vertical earth pressure was proposed. Then a formula for vertical earth pressure after seismic subsidence was derived while the friction force between the culvert and the fill were taken into account. The influence of the height and the modulus of fills, and the initial dy- namic stress were analyzed. The results show that the vertical earth pressure after seismic subsidence firstly increases with the height of fill and then decreases. The increase of the modulus of fill is ad- verse to the culvert safety under seismic load. The vertical earth pressure after seismic subsidence de- creases as the initial dynamic stress of fill increases.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第11期53-57,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
黄土地区公路建设与养护技术交通行业重点实验室开放课题(KLTLR-Y11-3)
关键词
黄土
震陷
高填方
涵洞
竖向土压力
loess
subsidence
high embankment
culvert~ vertical earth pressure
