摘要
珠三角水资源配置工程SL02#竖井地连墙嵌岩深度大,施工难度高。针对此问题对原设计方案进行优化分析。经分析,对于中下部为岩层的竖井,由于圆弧滑动、抗倾覆、抗隆起、整体稳定性的计算都较容易满足要求,地连墙的嵌岩深度主要取决于基坑内侧土反力验算结果。本文在上述分析基础上,提出了新的长短组合地连墙方案,并采用荷载-结构法对其进行数值模拟计算分析。通过计算结果与工程实际监测结果对比,长短连续墙计算位移值与实测值差距在15 mm以内,规律大体一致。采用长短组合的地下连续墙方案对竖井整体结构受力与位移影响不大,可有效降低地连墙嵌岩段的施工难度,节省材料,缩减工期。
The Zhujiang Delta Water Resources Allocation Engineering SL02#vertical shaft ground wall has a large rock embedded depth and high construction difficulty.The original design is optimized and analyzed for this problem.According to analysis,for shafts with rock formations in the middle and lower parts,calculations of arc sliding,anti-overturning,anti-uplifting,and overall stability are easier to meet the requirements.Moreover,the depth of rock socket of the ground connecting wall mainly depends on the check calculation of the soil reaction inside the foundation pit.Therefore,this paper proposes a new long and short ground connecting wall plan,and uses the load-structure method to carry out numerical simulation analysis.By comparing the calculated results with the actual monitoring results of the project,the difference between the calculated displacement value of the long and short continuous walls and the actual measured displacement is within 15 mm,which is roughly the same.Meanwhile,The long and short underground continuous wall scheme has little effect on the overall structure stress and displacement of the shaft,which can effectively reduce the construction difficulty of the rock-socketed section of the ground wall,save materials and shorten the construction period.
作者
周沛栋
彭祥
杨光华
李支令
乔国龙
Zhou Peidong;Peng Xiang;Yang Guanghua;Li Zhiling;Qiao Guolong(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,P.R.China;Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510610,P.R.China;The Geotechnical Engineering Technology Center of Guangdong Province,Guangzhou 510610,P.R.China;Guangdong Hydropower Planning&Design Institute Co.,Ltd.,Guangzhou 510635,P.R.China;Guangdong Yuehai Pearl River Delta Water Supply Co.,Ltd.,Guangzhou 511458,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2022年第S01期252-259,273,共9页
Chinese Journal of Underground Space and Engineering
基金
珠三角水资源配置工程首批科研课题(WW2018229)
国家自然科学基金(51778152)
关键词
圆形竖井
地下连续墙
长短墙组合
环梁
circular shaft
underground diaphragm wall
combination of long and short walls
ring beam
