填土表面倾斜的涵洞顶垂直土压力研究  

Study on Vertical Earth Pressure of Culvert Top under Inclined Fill Surface

作　　者：贾德鹏 李永刚[1] 周慧珍[2] JIA Depeng;LI Yonggang;ZHOU Huizhen(College of Water Resources Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Taiyuan University of Technology Library,Taiyuan 030024,Shanxi,China)

机构地区：[1]太原理工大学水利科学与工程学院,山西太原030024 [2]太原理工大学图书馆,山西太原030024

出　　处：《水力发电》2018年第12期35-38,共4页Water Power

基　　金：山西省自然科学基金资助项目(2012011025-2)

摘　　要：土坝和路堤下的涵洞大部分处于边坡之下,边坡下涵洞填土为倾斜表面,其与填土表面水平的涵洞受力不同。通过分析涵洞横纵2个方向涵顶填土的受力,对填土表面倾斜的涵洞顶垂直土压力进行理论计算和有限元模拟。结果表明,相同填土高度下,填土表面倾斜的涵洞顶垂直土压力大于填土表面水平的涵洞顶垂直土压力;填土表面坡度越陡,涵洞顶垂直土压力越大;边坡效应使涵洞土压力较自由场土柱压力增大0～40%,填土表面倾斜的涵洞土压力较表面水平填土涵洞土压力增大0～22%。The culverts under earth dam and embankment are mostly under slope.As the fill of culvert under slope is inclined surface,it is different from the force of culvert with horizontal fill surface.Based on the analyses of culvert earth-fill forces in transverse and vertical directions,the theoretical calculation and finite element simulation on vertical earth pressure of culvert top under inclined fill surface are carried out.The results show that,(a)at same filling height,the vertical earth pressure on inclined fill culvert is greater than that on horizontal fill culvert;(b)the steeper the fill surface slope,the greater the culvert top vertical earth pressure;and (c)the slope effect makes a increase of earth pressure on culvert by 0-40% than the free earth pressure,and the earth pressure of culvert top under fill inclined surface is increased by 0-22% than that under horizontal fill surface.

关 键 词：边坡 涵洞 土压力 等沉面 有限元 

分 类 号：TU432[建筑科学—岩土工程]