高边坡高挡墙结构物施工稳定性与极限承载力研究  

Research on the construction stability and ultimate bearing capacity of high slope and high retaining wall structures

作　　者：赵彩琴 钱利屏 潘文韬 Zhao Caiqin;Qian Liping;Pan Wentao(Zhejiang Yixin Transportation Design Co.,Ltd.,Hangzhou Zhejiang 311200,China;Hangzhou Highway and Port Management Service Center,Hangzhou Zhejiang 311202,China;Zhejiang Institute of Communications,Hangzhou Zhejiang 311112,China)

机构地区：[1]浙江易鑫交通设计有限公司,浙江杭州311200 [2]杭州市公路与港航管理服务中心,浙江杭州311202 [3]浙江交通职业技术学院,浙江杭州311112

出　　处：《山西建筑》2025年第7期55-59,共5页Shanxi Architecture

基　　金：浙江交通职业技术学院校级科研课题(课题编号:2024KJ05)。

摘　　要：为探究高边坡高挡墙施工稳定性与极限承载力,依托某国道改建工程,通过数值计算,分析了高边坡施工前后稳定性,并分析整体结构极限承载力,现场应用情况良好验证了相关方案的适用性。主要结论如下:天然状态下边坡变形集中于坡体后缘,施作支护后,锚索变形主要位于上侧,挡土墙上下侧分别承受较大拉压应力;未施作支护时,边坡下方与表面均存在剪切破坏,而施作支护后塑性区范围大幅减少仅在挡土墙后方存在少量塑性区,并且未采用支护措施边坡变形较采用支护措施大幅增大,表明锚索+挡土墙效果显著;外界荷载作用下,边坡逐渐发生失稳破坏,首先出现在侧方与挡土墙前下侧,增大荷载至11 MPa,塑性区进一步扩张,在边坡台阶较多位置处产生贯通塑性区,失去承载力;外界荷载作用下,初期随着侧方荷载增加,挡土墙压应力增加不明显,当侧方荷载达到9 MPa~11 MPa时,挡土墙压应力快速增加至开裂破坏强度。In order to explore the construction stability and ultimate bearing capacity of high slope and high retaining wall,relying on the reconstruction project of a certain national highway,numerical calculations were conducted to analyze the stability of the high slope before and after construction,and the overall structural ultimate bearing capacity was analyzed,the good on-site application has verified the applicability of the relevant solutions.The main conclusions are as follows:In the natural state,the deformation of the slope is concentrated at the rear edge of the slope.After being supported,the deformation of the anchor cable is mainly located on the upper side,and the upper and lower sides of the retaining wall bear significant tensile and compressive stresses respectively;When no support is applied,there is shear failure both below and on the surface of the slope.However,after the application of support,the range of plastic zone is significantly reduced,and only a small amount of plastic zone exists behind the retaining wall.Moreover,without support measures,the deformation of the slope is significantly increased compared to using support measures,indicating that the effect of anchor cable+retaining wall is significant;Under external loads,the slope gradually undergoes instability and failure.The failure first occurs on the side and the lower front of the retaining wall.When the load increases to 11 MPa,the plastic zone further expands,creating a continuous plastic zone at many locations on the slope steps,losing its bearing capacity;Under external loads,the initial increase in compressive stress of the retaining wall is not significant as the lateral load increases.When the lateral load reaches 9 MPa~11 MPa,the compressive stress of the retaining wall rapidly increases to the strength of cracking failure.

关 键 词：高边坡 高挡墙 施工稳定性 极限承载力 数值计算 现场监测 

分 类 号：TU476[建筑科学—结构工程]