超深基坑开挖对超临近高层建筑影响的离心模型试验研究  

Centrifugal model tests on effect of excavation super-deep foundation pits on adjacent high-rise buildings

作　　者：马险峰[1,2] 张海华[1,2] 朱卫杰[3] 郑宜枫[3] 徐前卫[4] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]上海隧道工程股份有限公司,上海200020 [4]上海理工大学,上海200093

出　　处：《岩土工程学报》2008年第S1期499-504,共6页Chinese Journal of Geotechnical Engineering

摘　　要：以上海某38m超深坑开挖为研究对象,利用离心模型试验研究了超深基坑的开挖后围护结构变形、周围地表沉降、临近建筑变形及其内在联系,并对有无超临近建筑的基坑开挖进行了对比分析。试验研究结果显示:超深基坑围护结构变形随着开挖进行而加大,在开挖后期侧移最大值不再增大,只是最大值点下移;地表沉降呈凹槽形,槽底随开挖的加深而逐渐向下向外移;临近高层建筑因基坑的开挖而发生不均匀沉降和水平侧移,但是变形量均在可接受的范围内;临近建筑物的存在使得围护结构的变形较无临近建筑时要小。The method of centrifugal model tests was used to study the deformation of enclosure structure,the settlement of nearby ground and the displacement of adjacent buildings as well as their internal relations based on the real super-excavation engineering with a depth of 38 m.Then,a comparision was made between the excavation with and without adjacent buildings. It was shown that the deformation of enclosure structure of super-excavation increased with the excavation.However,the maximum value of deformation did not increse but its position became lower and lower at the late time of excavation.The shape of ground settlement was groovelike,and its bottom went deeper and farther from the retaining walls during construction. Due to the excavation,the uneven settlement and lateral displacement of the adjacent buildings took place.But the value of the displacement was acceptable.As a result of the existance of the adjacent buildings,the deformation of enclosure structure was smaller than that without adjacent buildings.

关 键 词：超深基坑 临近建筑 挡墙变形 地表沉降 建筑变形 

分 类 号：TU473.2[建筑科学—结构工程]