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基坑支护结构稳定性优化设计与分析

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随着城市化的不断发展,基坑工程日益增多,基坑稳定性分析逐渐得到人们的重视.以广州市某基坑工程为例,介绍了该基坑支护结构设计与施工的重点与难点,并对该支护结构稳定性进行验算,根据计算结果可知,基坑支护结构安全性存在较大富余,为兼顾安全性与经济性,提出两种优化方案,比较可得方案一在满足规范要求的同时更为经济,建议对基坑顶部采用1:1放坡并拆除第二道混凝土支撑.基坑支护结构南北两侧放坡与排桩加内支撑支护两种不同支护方式,需要考虑过渡段的设计,建议多施工3~5根灌注桩作为渐变段,这样放坡和支护桩可以渐进过渡,提高基坑的稳定性.研究结果可为区域类似工程提供参考.
Optimal Design and Analysis of Stability of a Deep Excavation Supporting Structure
With the continuous development of urbanization,deep excavation projects for the high-rise buildings and subway stations are emerging,and the stability analysis of the deep excavation is gradually gaining the public attention.This paper in-troduces the key points and difficulties of the design and construction of a deep excavation supporting structure in Guangzhou.The stability of the supporting structure is also evaluated.It is concluded that a large surplus in the stability of the structure and two optimization schemes in order to take into account safety and economy are proposed.Comparing the analytical results,it can be seen that the first scheme is more economical and safer,and it is recommended to take the top 1:1 grading of the deep excavation supporting structure and cancel the second concrete support measures.This investigation result can provide refer-ence for similar projects in the region.

Deep Excavation EngineeringFactor of SafetyStability

丁龙翔

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广州市增城区水务局,广州 510000

基坑工程 安全系数 稳定性

2024

土工基础
湖北省土木建筑学会,中国科学院武汉岩土力学研究所,武汉市土木建筑学会

土工基础

影响因子:0.238
ISSN:1004-3152
年,卷(期):2024.38(1)
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