滨海城市道路边坡滑移的现场观测与理论分析  

Field observations and theoretical analysis of road slope failure in coastal cities

作　　者：高焰林 黄茂隆 周权 常岳 GAO Yan-lin;HUANG Mao-long;ZHOU Quan;CHANG Yue(Central Research Institute of Building and Construction(Shenzhen)Co.,Ltd.MCC Group,Shenzhen 518055,Guangdong,China;Jingye Engineering Technology(Shenzhen)Co.,Ltd.,Shenzhen 518055,Guangdong,China;Zhuhai Institute of Civil Construction-Safety Research Co.,Ltd.,Zhuhai 519000,Guangdong,China)

机构地区：[1]中冶建筑研究总院(深圳)有限公司,广东深圳518055 [2]中国京冶工程技术有限公司深圳分公司,广东深圳518055 [3]珠海市建设安全科学研究院有限公司,广东珠海519000

出　　处：《地基处理》2024年第S01期103-110,共8页Journal of Ground Improvement

摘　　要：本研究通过对某滨海城市道路工程中的边坡滑移进行分析,采用现场观测与有限元分析相结合的方法,系统探讨了边坡滑移的原因和机制。通过现场观测,明确了边坡后仰及土体变形的情况,通过地貌特征确定了滑移区域。借助理正和PLAXIS软件,对比了极限平衡法与强度折减法在稳定性分析中的差异,揭示了在复杂地质条件和降雨等不利工况下,边坡稳定性的动态变化。本研究强调了现场观测在数值模拟中的指导作用,将现场观测结果用于滑移面范围的确定,并通过与模拟结果的交叉验证,提升了模型的准确性和科学性。分析结果显示,因排水不良等各种因素导致了地基强度下降,在暴雨荷载的共同作用下引发了滑移;该项目中,当土体实际强度降至设计强度的50%以下时,路基出现失稳。本研究同时表明,现场观测与数值模拟相结合的方法能够更准确地分析边坡滑移的机制,为类似地质工程问题提供新的研究思路和分析方法。This study analyzes the slope failure in a coastal city's road project,utilizing a combination of field observations and finite element analysis to systematically investigate the causes and mechanisms of slope failure.Field observations confirmed the backward tilting and deformation of the slope,and the slip areas were identified based on geomorphological features.By using the limit equilibrium method and strength reduction method in the software PLAXIS,this study compared the differences of these two methods in stability analysis under complex geological conditions and adverse operational conditions such as rainfall,revealing the dynamic changes in slope stability.The study highlights the guiding role of field observations in numerical simulations,using the observed data to define the extent of the slip surface and enhancing model accuracy and scientific validity through cross-validation with simulation results.The analysis indicates that the coupled effect of storms and various factors such as poor drainage,which contributes to the reduction in foundation strength,triggers slope instability.The subgrade becomes unstable when the actual strength of the foundation falls below 50% of the designed strength.This research also demonstrates that the combination of field observations and numerical simulation can more accurately analyze the mechanisms of slope failure,providing new research approaches and analytical methods for similar geological engineering problems.

关 键 词：滨海城市 边坡稳定 现场观测 强度折减法 毕肖普法 

分 类 号：U416.14[交通运输工程—道路与铁道工程]