摘要
以广西桂平航运枢纽扩建工程为研究对象,利用FLAC3D数值模拟软件,结合监测资料对两种支护方案下的深基坑边坡稳定性进行计算与分析。结果表明:基坑开挖后底部以卸荷回弹为主,两侧边坡以朝向基坑内侧变形为主,锚索锚杆支护方案整体位移大于桩锚结合支护方案;依据监测资料,基坑两侧边坡变形随开挖深度增大影响较大,但基坑左侧边坡相对基坑右侧边坡变形较小,基坑右侧边坡变形与河床水位相关性较大;数值模拟结果与监测资料结果在变形规律上较为吻合,桩锚结合支护方案在深基坑边坡支护效果上优于锚索锚杆支护方案,推荐采用桩锚结合支护方案对深基坑边坡进行支护。本文的研究对类似工程具有重要参考价值。
In this paper,taking the expansion project of Guiping Shipping Hub in Guangxi as the research object,FLAC3 D numerical simulation software and monitoring data were used to calculate and analyze the stability of deep foundation pit slope under two supporting schemes.The results show that:after the excavation of the foundation pit,the bottom of the foundation pit is mainly unloaded and the slope on both sides is mainly deformed towards the inside of the foundation pit.The overall displacement of the anchor cable and bolt support scheme is greater than that of the pile-anchor combined support scheme.According to the monitoring data,the deformation of the slope on both sides of the foundation pit is affected by the excavation depth.However,the deformation of the slope on the left side of the foundation pit is smaller than that on the right side of the foundation pit.In addition,the deformation of the slope on the right side of the foundation pit has a great correlation with the river level.The results of numerical simulation are consistent with the results of monitoring data in terms of deformation law,and the pile-anchor combined support scheme is better than the anchor cable and bolt support scheme in the supporting effect of deep foundation pit slope,so it is recommended to adopt the pile-anchor combined support scheme to support the deep foundation pit slope.
作者
黄秘昌
黄祖芹
邓检强
杨璐菲
朱新民
HUANG Michang;HUANG Zuqin;DENG Jianqiang;YANG Lufei;ZHU Xinmin(Guangxi Water Resources and Electric Power Survey and Design Institute,Nanning 530023,Guangxi,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)
出处
《水利水电技术（中英文）》
北大核心
2022年第S02期399-405,共7页
Water Resources and Hydropower Engineering
关键词
工程安全
深基坑
边坡稳定性
支护方案
桂平航运枢纽
safety engineering
deep foundation pit
slope stability
supporting scheme
guiping shipping hub
作者简介
黄秘昌(1978—),男,高级工程师,水工院院长,主要从事水利水电工程设计工作。E-mail:214735966@qq.com;通信作者:朱新民(1967—),男,正高级工程师,水电中心副主任、结构材料研究所副所长,主要从事水利水电工程科研和咨询工作。E-mail:zhuxm8@iwhr.com
