降雨作用下抗滑桩与三维土工网垫植草护坡坡体的稳定分析  

Stability analysis of slip resistant piles and 3-D geonetmats for grassed slope retaining slopes under rainfall effects

作　　者：张春丽[1] 程庆 孙卓君 李杰 秦梦迪 纠永志[1] ZHANG Chun-li;CHENG Qing;SUN Zhuo-jun;LI Jie;QIN Meng-di;JIU Yong-zhi(School of Civil Engineering&Architecture,Zhongyuan University of Technology,Zhengzhou 450000,China)

机构地区：[1]中原工学院建筑工程学院,河南郑州450000

出　　处：《河南城建学院学报》2024年第3期23-28,55,共7页Journal of Henan University of Urban Construction

基　　金：国家自然科学基金项目(51608548)。

摘　　要：针对抗滑桩与三维土工网垫植草护坡在降雨作用下的稳定性问题,采用有限元强度折减法,利用ABAQUS建立抗滑桩与三维土工网垫植草护坡坡体的三维有限元模型,以坡底水平位移突变情况作为边坡失稳的判断标准,分别比较了不同工况下护坡安全系数随降雨时长的变化规律,以及降雨作用下抗滑桩桩位、桩长对抗滑桩与三维土工网垫植草护坡坡体的稳定性影响,并与未考虑降雨时的影响规律进行对比。结果表明:降雨时长对三维土工网垫植草工况的边坡稳定性影响较为明显;抗滑桩桩长对边坡稳定性影响较大,桩长宜取8 m;无降雨作用下将桩位置于坡中时边坡整体获得最大安全系数,降雨作用下将抗滑桩置于相对位置(L 0.4=4.8 m)时能够起到更好的抗滑效果;抗滑桩与三维土工网垫植草在降雨作用时加固护坡的效果比无降雨时更好,且优于原边坡。Aiming at the stability problem of anti-slide pile and three-dimensional geotechnical mesh mat grass slope protection under rainfall,the three-dimensional finite element model of anti-slide pile and three-dimensional geotechnical mesh mat grass slope protection is established by using ABAQUS with the strength reduction method of finite element.Taking the catastrophe of horizontal displacement at the bottom of slope as the criterion of slope instability,the variation law of slope protection safety factor with rainfall duration under different working conditions is calculated and compared,and the influence of pile position and pile length on the stability of anti-slide pile and three-dimensional geotechnical mesh mat grass slope protection under rainfall is compared with that without considering rainfall.The results show that the effect of rainfall duration on the three-dimensional geotechnical mesh mat grass slope stability is obvious;the length of anti-slide pile has a great influence on the stability of slope,and the length of pile should be 8 m;when the pile is placed in the middle of the slope without rainfall,the maximum safety factor can be obtained,and when the anti-slide pile is placed in the relative position(L 0.4=4.8 m)under rainfall,the better anti-slide effect can be achieved;the effect of anti-slide pile and three-dimensional geotechnical mesh mat planting grass on reinforcing slope protection under rainfall is better than that under no rainfall,and it is better than the original slope.

关 键 词：抗滑桩 三维土工网垫植草 边坡稳定性 降雨 有限元强度折减法 

分 类 号：U418.52[交通运输工程—道路与铁道工程]