桩基施工及基坑开挖对邻近建筑物联合影响研究  

Influence of pile construction and excavation on adjacent buildings

作　　者：徐长节[1,2] 金飚[3] 孙凤明[1,2] 陈其志[1,2] 

机构地区：[1]浙江大学滨海和城市岩土工程研究中心,浙江杭州310058 [2]浙江大学软土与环境工程教育部重点实验室,浙江杭州310058 [3]杭州市建设工程质量安全监督总站,浙江杭州310000

出　　处：《岩土工程学报》2013年第S2期809-813,共5页Chinese Journal of Geotechnical Engineering

摘　　要：近年来城市中的工程建设对周围建筑物的影响越发突出,以一个相邻基坑的建筑物为背景,从三方面分析了已有建筑物基础产生位移的影响因素,并和现场实测数据做了对比。首先采用理论公式分析了桩基挤土效应对房屋基础位移的影响,其次采用有限元Plaxis模拟了基坑开挖对房屋基础不均匀沉降影响程度,最后分析了相邻建筑物相互影响所导致的基础不均匀沉降情况。分析结果表明,建筑物基础因土体固结所产生的不均匀沉降十分显著,而相邻工程施工对其影响较小。对于类似的工程问题,需要全面研究各种因素对已有建筑物的影响,不能简单地将存在的建筑物问题归结为相邻工程的施工导致。希望对以后类似工程予以一定借鉴。The effect of engineering construction on the adjacent buildings has become prominent in recent years. The reasons why the existing building foundations have displacement are analyzed from three different aspects based on a typical building dose to a pit, then the results are compared with the field data. Firstly, the effect of jacked piles on the building foundation is studied based on the relevant theory. Secondly, the influence of excavation on the uneven settlement of the buildings induced by newly adjacent foundation excavation is simulated by means of the Plaxis FEM program. Finally, the uneven settlement of foundation induced by the existing adjacent buildings is studied. The results show that the uneven settlement of foundation is mainly caused by soil consolidation and the existing adjacent buildings, rather than the new project construction. For the similar engineering problems, various factors should be taken into consideration, rather than to be simply attributed to a new project. This study may be a reference for similar cases.

关 键 词：静压桩 基坑 相互作用 建筑物沉降 

分 类 号：TU753.3[建筑科学—建筑技术科学]