基于应力释放的边坡开挖及支护时机优化策略研究  

Research on Optimization Strategy of Slope Excavation and Support Time Based on Stress Release

作　　者：宋双江 SONG Shuangjiang(China Railway 14th Bureau Group Co.,Ltd.,Chongqing 401121,China)

机构地区：[1]中铁十四局集团有限公司,重庆401121

出　　处：《中国厨卫》2025年第3期174-176,共3页Chinese Kitchen & Bathroom

摘　　要：文章以重庆椿萱大道工程实例,从应力释放的角度分析了柔性挡墙在不同位移条件下作用在挡墙上的土体推力,进而探讨了土体相关参数的影响因素。研究结果表明,在进行边坡开挖时,将应力释放率控制在40%~60%较为合适,且边坡开挖后应力释放率越大,抗滑桩桩身最大正、负弯矩值以及最大剪应力下降越明显;而桩后岩土体内摩擦角和粘聚力越大,应力释放后塑性区范围就越小,桩身弯矩值降低率就越大。Taking Chunxuan avenue project in Chongqing as an example,this paper analyzes the soil thrust of flexible retaining wall under different displacement conditions from the perspective of stress release,and then discusses the influencing factors of soil related parameters.The results show that It is appropriate to control the stress release rate between 40%and 60%,and the greater the stress release rate after slope excavation,the more obvious the decrease of the maximum positive and negative bending moments and the maximum shear stress of the anti slide pile shaft,while the greater the internal friction angle and cohesion of the rock and soil behind the pile,the smaller the plastic zone after stress release,and the greater the reduction rate of the bending moment of the pile shaft.

关 键 词：应力释放 边坡开挖 支护时机 支护桩位移 

分 类 号：U416.14[交通运输工程—道路与铁道工程]