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紧邻既有铁路深基坑开挖支护方案模拟分析与计算
引用本文:吴璀余.紧邻既有铁路深基坑开挖支护方案模拟分析与计算[J].国防交通工程与技术,2010,8(4):40-42.
作者姓名:吴璀余
作者单位:中铁二十四局浙江工程有限公司,浙江杭州,310009
摘    要:采用模拟手段,对沪宁城际铁路紧邻既有铁路的新孟河特大桥的深基坑安全性问题进行了探讨,建立了基坑开挖、支护的有限元模型,全面分析了紧邻既有线深基坑在开挖过程中的地表沉降、钢板桩及各道支撑的变形及内力。通过计算认为:此桥采用的深基坑施工方案合理可行,能确保基坑支护体系和已有建筑物安全。随后的施工实践证明了计算的正确。

关 键 词:深基坑  开挖  支护  数值模拟  地表沉降  钢板桩  支撑  既有铁路

Numerical Simulation and Analysis of the Supporting and Retaining Plan for the Excavation of Deep Foundation Pits near Existing Railways
Wu Cuiyu.Numerical Simulation and Analysis of the Supporting and Retaining Plan for the Excavation of Deep Foundation Pits near Existing Railways[J].Traffic Engineering and Technology for National Defence,2010,8(4):40-42.
Authors:Wu Cuiyu
Institution:Wu Cuiyu(Zhejiang Engineering Co.Ltd.of the 24th Bureau Group of the Railway Building Corporation of China,Hangzhou 310009,China)
Abstract:An Exploration is made by means of simulation into the safety of the deep foundation pits for the Xinmenghe Mega Bridge of the Shanghai-Nanjing Inter-city Railway near an existing railway in the paper,with finite element models for the excavation of the foundation pits,and for retaining and supporting established,upon the basis of which the settlement of the ground surface during the excavation of the deep foundation pits,and the deformation and internal forces of the steel plate piles and each support are analyzed in an all-round way.It is found through calculations that the supports and retaining structures for the foundation pits,and the existing buildings are safe.It is also found that the construction plan for the deep foundation pits is feasible.The subsequent construction practice also proves the correctness of the calculations.
Keywords:deep foundation pit  dig  supporting and retaining  numerical simulation  settlement of the ground surface  steel plate pile  brace  existing railways
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