摘要
采用有限元分析软件Midas/GTS,分析了非对称沟谷宽度及沟谷坡度对涵洞涵周土压力、涵顶填土差异沉降及基底沉降量的影响。研究结果表明:受边坡坡体与填土间摩擦作用影响,沟谷地形非对称会产生明显的偏载效应,即涵顶垂直土压力、涵顶填土沉降量及基底沉降等均呈非对称分布,且随着涵身两侧坡体坡度差及沟谷宽度差的增大而增加;当涵身两侧坡体沟谷宽度相差3倍、坡体坡度差大于45°后偏载效应逐渐趋于稳定;基底两端差异沉降受偏载效应影响比涵顶垂直土压力更为明显,当涵身两侧沟谷宽度相差7.5倍、坡体坡度差为90°时,基底两端沉降量分别相差30.7%和35.5%。因此,由地形条件非对称引起的高填方涵洞偏载效应应引起充分重视。
By using the finite element analysis software Midas/GTS,the influence of asymmetric gully width and gully slope on the earth pressure of culvert culvert,the difference settlement of culvert top filling soil and the settlement of the base is analyzed. The results show that the slope and soil friction effect,the asymmetric valley terrain will produce partial load effect,namely the vertical earth pressure,culvert settlement and settlement are asymmetric distribution,and with the culvert on both sides of the slope and gully slope difference is wide variation law of nonlinear increase degree difference increases,When the width of the gully on both sides of the culvert body is 3 times times and the slope gradient is more than 45 o,the deflection effect tends to stabilize gradually. The difference settlement between the two ends of the substrate is more obvious than the verticalsoil pressure of the culvert roof,when the width of the gully on both sides is 7. 5 times times,the slope is 90 o,the settlement of the base is 30. 7% and 35. 5% respectively. Therefore,due to the asymmetry of terrain conditions,the deflection effect of high fill culvert should be paid attention to.
作者
郝宇萌
董芸秀
李少杰
HAO Yu-meng;DONG Yun-xiu;LI Shao-jie(Chang＇an University,Xi＇an 710064,China;CCCC Second Highway Consultant Co.Ltd,Wuhan 430056,China)
出处
《河南城建学院学报》
CAS
2018年第3期42-49,共8页
Journal of Henan University of Urban Construction
基金
广东省交通运输厅科技计划项目(2013-02-010)
关键词
高填方
盖板涵
数值模拟
偏载效应
土压力
沉降差
high fill
slab culvert
numerical simulation
off-load effect
earth pressure
differential settlement
