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淮安高铁站深基坑空间抽水试验及降水方案控制

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随着城市深部空间的大规模开发,基坑开挖深度愈来愈深,对受承压水影响的深基坑工程,抽水试验显得尤为重要.以淮安市高铁站枢纽空间某深基坑工程为例,全面概述了抽水试验井的设计、布置、试验方法及成果.之后采用不同计算方法对比和分析了基坑水文地质参数,确定了主要含水层渗透系数、影响半径.最后,根据基坑设定深度内的涌水量,结合基坑特点提出了管井降水方案建议,讨论和预测了降水对周边构筑物和环境的影响:①含水层实际水文参数很难仅依靠室内试验反映,需同时结合抽水试验分析.②厚含水层渗透系数较大时,为避免流砂、管涌等不良水文地质现象,建议采用大口径管井降水.
Pump Test and Dewatering Control Methods for the Deep Excavation of a High-Speed Railway Station in Huai'an
The large-scale development and utilization of the urban underground space has made the excavation depth of founda-tion pits deeper and deeper.The pump test is particularly important for the deep excavation projects affected by the artesian wa-ter.A deep excavation project in the hub space of the Huai'an high-speed railway station is presented as a case history.A com-prehensive overview of the design,point arrangements,test methods and results of the pump test wells is presented.After that,the different estimation methods are used to compare and analyze the hydrogeological parameters of the excavated area,and the permeability coefficient and the radius of the influence of the main aquifer are determined.Finally,based on the water influx within the set depth of the excavated area,recommendations for a point well precipitation program are proposed in com-bination with the characteristics of the excavated area.The impact of the precipitation on the surrounding structures and the en-vironment is discussed and predicted in the paper.

Artesian Ground waterDeep ExcavationPump TestHydrological ParametersDewatering Project

洪迪思、刘兆成、柳信

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江苏省水文地质海洋地质勘查院,江苏淮安 223005

淮安市地质矿产勘查院,江苏淮安 223001

中国科学院武汉岩土力学研究所,武汉 430071

承压水 深基坑 抽水试验 水文参数 降水工程

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(4)