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隧道建设(中英文) ›› 2019, Vol. 39 ›› Issue (S2): 326-334.DOI: 10.3973/j.issn.2096-4498.2019.S2.041

• 施工技术 • 上一篇    下一篇

复杂环境下地铁车站PBA 工法施工降水

杜宪武1, 刘运思2, 3, ∗, 郭 磊4, 杨玉平1, 李小雷1, 王 晶1, 周小龙1   

  1. (1. 中铁北京局集团 (天津)工程有限公司, 天津 300000; 2. 湖南科技大学 岩土工程稳定控制与健康监测省重点实验室, 湖南 湘潭 411201; 3. 湖南科技大学土木工程学院, 湖南 湘潭 411201; 4. 中铁北京工程局集团有限公司, 北京 100000)
  • 收稿日期:2019-06-11 出版日期:2019-12-31 发布日期:2020-04-04
  • 作者简介:杜宪武(1973—), 男, 山西忻州人, 2012 年毕业于北京交通大学, 土木工程专业, 本科, 高级工程师,现从事地下工程研究工作。 E-mail: dxw12363@ sohu. com。?通信作者: 刘运思, E-mail: liuyunsi@ sohu. com。
  • 基金资助:

    国家自然科学基金资助项目(51704109); 湖南省自然科学基金(2015JJ6038)

Dewatering Technology of PBA Metro Station under Complex Environment

DU Xianwu1, LIU Yunsi2, 3, , GUO Lei4, YANG Yuping1, LI Xiaolei1, WANG Jing1, ZHOU Xiaolong1   

  1. (1. Tianjing Engineering Co., Ltd. of China Railway Beijing Engineering Group, Tianjin 300000, China; 2. Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China; 3. School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China; 4. China Railway Beijing Engineering Group Co., Ltd., Beijing 100000, China)
  • Received:2019-06-11 Online:2019-12-31 Published:2020-04-04

摘要:

地铁车站修建过程中存在临近建筑物、管线密集复杂、地下水丰富的特点。为解决地铁车站PBA 工法施工需在无水环境下作业,又不能过度占用地面空间和影响周边环境的问题,针对北京地铁17 号线十里河地铁车站所处的复杂环境,采用一种以洞内轻型井点为主、地表真空管井为辅,与PBA 工法有效结合的综合降水方法。降水效果表明: 1)地面管井有效地控制了各层地下水水位,确保了竖井正常施工; 2)水平辐射井作为施工横通道和导洞开挖的主要降水方法,有效地降低了开挖范围内承压水等水量较大的地下水水位,确保了PBA 工法施工处于无水环境; 3)斜井作为洞内辅助降水施工手段,处理了层间潜水和界面残留水。

关键词: 地铁车站, 复杂环境, PBA 工法, 降水, 管井, 轻型井点

Abstract:

The construction of metro station has characteristics such as adjacent buildings, dense pipelines and rich groundwater. In order to solve the construction problem PBA metro station without water, the limit ground area and surrounding environment, a comprehensive dewatering method combined with PBA method is used in Shilihe Metro Station on Beijing Metro Line No. 17 in complex environment, and the light well point in tunnel as main mean and vacuum tube on ground as assistant are adopted. The dewatering effects show that: (1) The ground tube well effectively controls the groundwater level of each layer to ensure the normal construction of the vertical shaft. (2) The horizontal radiation wells, as the main precipitation method for construction cross passageway and pilot tunnel excavation, effectively reduces the groundwater level with large water volume such as confined water within the excavation range, which provides a water-free environment for PBA station. (3) The inclined shaft is used as an auxiliary dewatering construction method in tunnel to dewater the inter-layer diving and interfacial residual water.

Key words: metro station, complex environment, PBA station, dewatering, tube well, light well point

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