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隧道建设(中英文) ›› 2022, Vol. 42 ›› Issue (S1): 404-412.DOI: 10.3973/j.issn.2096-4498.2022.S1.047

• 施工技术 • 上一篇    下一篇

盾构隧道内机械法修建废水泵房技术研究

李鹏飞1, 丘锦润1, 王利民2, 帅玉兵2, 王锡军2, 张明聚1, 王浩2   

  1. 1. 北京工业大学 城市与工程安全减灾省部共建教育部重点实验室, 北京〓100124;  2. 北京建工土木工程有限公司, 北京〓100015

  • 出版日期:2022-07-22 发布日期:2022-08-22
  • 作者简介:李鹏飞(1983—),男,河南开封人,2011年毕业于北京交通大学,桥梁与隧道工程专业,博士,教授,主要从事隧道工程等方面的教学和研究工作。Email: lpf@bjut.edu.cn。

Mechanized Construction of Wastewater Pump Room in Shield Tunnel

LI Pengfei1, QIU Jinrun1, WANG Limin2, SHUAI Yubing2, WANG Xijun2, ZHANG Mingju1, WANG Hao2   

  1. (1. Key Laboratory of Urban Security and Disaster Engineering (Beijing University of Technology), Ministry of Education, Beijing 100124, China; 2. BCEG Civil Engineering Co., Ltd., Beijing 100015, China)

  • Online:2022-07-22 Published:2022-08-22

摘要: 为解决采用传统矿山法修建废水泵房存在工期长、风险大等问题以及在机械法联络通道内修建废水泵房作业空间狭小、二次拆除管片风险大等问题,提出采用机械法在盾构隧道内修建废水泵房,明确上部接口和下部封底2项关键技术,并通过数值模拟分析地层水压力对封底混凝土力学性能的影响,最后将该修建技术应用到北京地铁17号线望—勇区间隧道中。研究结果表明: 1)考虑安全系数不小于1.4的情况下,1.0 mC30混凝土封底水压可用于不超过0.3 MPa水压的地层条件; 2)封底混凝土与外盾相连接的角部为薄弱部位,其破坏模式呈异形“八”字分布; 3)盾构隧道内采用机械法修建废水泵房能有效保障施工质量,泵房容积大,可有效减少潜水泵的启停次数,降低维修时间和成本,减少对线路运营的影响。

关键词: 地铁工程, 盾构隧道, 机械化施工工艺, 废水泵房, 泵房封底

Abstract: The wastewater pump room constructed by conventional mining method has disadvantages of long construction period and high risk, and the wastewater pump room in connection gallery constructed by mechanized method is limited by small operation space and high risk of secondary segment dismantling. Accordingly, mechanized construction method is proposed for wastewater pump room in shield tunnel, and two essential techniques of upper joint and bottom sealing are clarified. Then, numerical simulation method is conducted to analyze the influence of ground water pressure on mechanical properties of sealing concrete. The results of the techniques have been applied in wastewater pumping station in a shield tunnel of Wangjingxi stationYongshiying station tunnel section of Beijing metro line 17. The resalts show that: (1) Under the condition that the safety factor larger than 1.4, the bottom sealing water pressure of 1.0m thick C30 sealing concrete can be used for the formation condition that does not exceed 0.3 MPa water pressure. (2) The corner of the connection between the bottom sealing concrete and the outer shield is weak, and its failure mode shows a gable slope shape distribution. (3) The mechanized construction of wastewater pump room with large volume in shield tunnel can effectively control the construction quality, reduce the stop time of submerged pump, the maintaining time and cost, and influence on line operation.

Key words: metro engineering, shield tunnel, mechanized construction technology, wastewater pump room, pump room sealing