海积软土地层平行近接深基坑施工相互影响分析  

Research on Interaction Effects of Deep Foundation Pit Excavation and Parallel Adjacent Stations in Marine Soft Soil Stratigraphy

作　　者：李洪庆 陈佳玮[2] 

机构地区：[1]深圳地铁集团有限公司,深圳518026 [2]中国矿业大学力学与土木工程学院,江苏徐州221116

出　　处：《广东土木与建筑》2017年第3期62-65,共4页Guangdong Architecture Civil Engineering

摘　　要：以深圳地铁11号线前海湾站为工程背景,利用FLAC对有无既有车站的工况进行对比模拟分析,结果表明:基坑开挖1倍深度范围内为强影响区,2倍深度范围内为弱影响区,超过2倍深度范围为无影响区;既有地铁车站对深基坑开挖有遮拦作用,有利于基坑开挖的稳定性,当既有车站处于基坑强影响区时,遮拦作用明显,并表现出非线性叠加的趋势;基坑周围强影响区范围内结构因沉降和隆起双重作用表现出沉降、朝向基坑侧移和背向基坑倾斜的变形趋势。This paper was carried out to study on this problem on the background of Shenzhen metro on Line 11 Qianhaiwan Station,which based on the exist condition,by using FLAC numerical simulation. The results showed that：a certain range around the pit can be divided into three-affected zones, the strong affected zone is within the depth range,the weak affected zone is within the twice depth range. No affected zone is outside twice the depth range. The existing station has an obscuration effect on the excavating deep foundation pit,and is benefit to the stability of excavation. When locates in the strong affected zone,obscuration effect performs obviously. Moreover,the obscuration effects of several existing stations have exhibited a nonlinear superposition trend. Structures within the strong affected zone show deforma- tion trend of settlement,sway toward pit and rotation backward pit due to subsidence and uplift effect.

关 键 词：既有车站 平行近接 深基坑 数值模拟 相互影响 

分 类 号：TU753.1[建筑科学—建筑技术科学]