摘要
为解决破碎带地质下高边坡易失稳的问题,以自贡市T3路宝珍井段道路高边坡工程为依托,提出双排方桩、双排方桩+锚索、单排方桩、单排圆桩+锚索4种加固方案,并采用三维弹塑性有限元模型,对边坡开挖与加固过程进行了动态模拟;通过分析边坡和支护结构的受力与变形规律,对比了其加固效果。研究结果表明:抗滑桩水平位移曲线沿桩身均呈现非线性分布特征,锚索使桩顶水平位移值得到了有利改善,其中方案4桩顶水平位移值最小,为16.28 mm;4种方案的坡顶沉降曲面均呈现出抛物线形分布规律,其中方案4最大沉降值最小,为50.2 mm,方案3建筑沉降差最小,为35.7 mm;边坡塑性区主要集中在破碎带附近;4种方案边坡滑动安全系数分别为1.325、1.206、1.416、1.566,其中方案4富余度最高;方案4工程造价最低,为654.35万元;采用方案4支护可兼具安全性和经济性。该研究成果可为类似边坡工程施工提供参考。
To address the issue of instability of high slopes in fractured geological zones,based on the high slope project of Baozhenjing section of T3 Road in Zigong City,four reinforcement schemes were proposed,including double-row square piles,double-row square piles plus anchor cables,single-row square piles,and single-row round piles plus anchor cables.A 3D elasto-plastic finite element model was employed to dynamically simulate the slope excavation and reinforcement processes;By analyzing the stress and deformation patterns of the slope and supporting structures,the reinforcement effects were analyzed.The research results indicate that the horizontal displacement curves of antislide piles exhibit a nonlinear distribution characteristic along the pile shaft.Anchor cables significantly improve the horizontal displacement values at the top of piles.Scheme 4 achieves the smallest horizontal displacement value of 16.28 mm;All the slope top settlement surfaces of four schemes follow a parabolic distribution pattern.Scheme 4 has the smallest maximum settlement value of 50.2 mm,and Scheme 3 has the smallest building settlement difference of 35.7 mm;The plastic zone of the slope is primarily concentrated near the fractured zone;The sliding safety factors are 1.325,1.206,1.416,and 1.566,respectively.Scheme 4 has the highest margin;Scheme 4 also boasts the lowest project cost of 6.5435 million yuan;Scheme 4 for support offers both safety and economy.This research can provide reference for similar slope engineering construction.
作者
甘露
文继涛
傅伟栗
黄洪恩
GAN Lu;WEN Jitao;FU Weili;HUANG Hongen(Zigong Academy of Urban Planning&Design Co.,Ltd.,Zigong 643000,China)
出处
《市政技术》
2026年第1期75-84,共10页
Journal of Municipal Technology
关键词
边坡工程
破碎带
抗滑桩
位移
有限元
slope engineering
fractured zone
anti-slide pile
displacement
finite element
