盾构侧穿邻近古建筑地表长期沉降预测与分析  

PREDICTION AND ANALYSIS OF LONG-TERM SURFACE SETTLEMENT CAUSED BY SHIELD TUNNELING SIDE-CROSSING ADJACENT ANCIENT BUILDINGS

作　　者：张登雨[1,2] 张子新[1,2] 吴昌将[3] 

机构地区：[1]同济大学土木工程学院,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]上海建筑设计研究院有限公司,上海200041

出　　处：《岩石力学与工程学报》2011年第10期2143-2150,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：上海市重点学科资助项目(B308);上海申通地铁集团资助项目(STTC-HT-001)

摘　　要：结合上海地铁11号线侧穿徐汇天主教堂的实际工程,考虑MJS桩加固及建筑物存在对地表长期沉降的影响,采用数值计算和现场实测相结合的方法,对盾构侧穿邻近古建筑地表长期沉降进行预测和分析。计算结果表明,地表长期沉降随时间逐渐增大最后渐趋稳定,而由于MJS桩加固作用及建筑物的存在,地表长期沉降槽与传统形式有很大差异,表现出明显不对称性。此外,由于MJS桩的保护,有效控制了加固区附近的长期沉降,降低了长期沉降对周围环境的影响。从数值计算结果与现场实测情况来看,两者反映的规律基本一致,可验证数值计算方法的可靠性。基于上述研究成果,讨论MJS桩加固、建筑物、扰动范围以及蠕变参数等变化对地表长期沉降的影响,可为今后类似工程提供借鉴。Based on the project of Shanghai metro line 11＇s side-crossing the St.Ignatius Cathedral,some helpful predications and deep analysis about long-term surface settlements have been presented by employing numerical simulation approaches and in-situ measurement techniques.Furthermore,the strengthening effects of MJS piles and the complicated influences of adjacent architectures are evaluated and calculated prudently.The computation results indicate that long-term surface settlement increases gradually over time and achieves stabilization ultimately.Due to the existence of MJS piles and adjacent buildings,the settlement trough significantly differs from traditional forms and performs a remarkable asymmetry.Particularly,it should be emphasized that those MJS piles effectively protect the surrounding region from large settlements and other harmful effects.The numerical simulation results and in-situ measurement data reveal a matching physical discipline;so the method of numerical simulation is validated scientifically and reasonably.Finally,several influences which contribute to the long-term settlement are analyzed：MJS pile reinforcement,building,disturbed region and creep parameters.Obviously,the achievement in this paper would provide a valuable reference for future similar projects.

关 键 词：桩基工程 MJS桩 侧穿 古建筑 长期沉降 现场实测 数值计算 

分 类 号：TU44[建筑科学—岩土工程]