• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2022, Vol. 42 ›› Issue (S1): 128-135.DOI: 10.3973/j.issn.2096-4498.2022.S1.015

• 研究与探索 • 上一篇    下一篇

盾构隧道内机械法施工竖井泵房封底试验与数值模拟研究

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

  1. 1. 北京建工土木工程有限公司, 北京〓100015;

     2. 北京工业大学 城市与工程安全减灾教育部重点实验室, 北京〓100124

  • 出版日期:2022-07-22 发布日期:2022-08-22
  • 作者简介:帅玉兵(1972—),男,湖北京山人,1996年毕业于西南交通大学,工程机械专业,本科,高级工程师,现从事地下工程施工管理工作。 E-mail: 78424463@qq.com。*通信作者: 李鹏飞, E-mail: lpf@bjut.edu.cn。

Experimental Study and Numerical Simulation of Bottom Sealing of Shaft Pump Room in Shield Tunnel Constructed by Mechanical Method

SHUAI Yubing1, QIU Jinrun2, LI Pengfei2, *, WANG Limin1, WANG Hao1, WANG Xijun1, ZHANG Mingju2   

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

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

摘要: 为验证在盾构隧道内机械化施工废水泵房施工工艺的可行性以及泵房封底混凝土的可靠性,首先设计室内试验,模拟验证封底混凝土板在高水压深层地层环境中施工的安全性,然后采用三维有限差分软件FLAC3D建立三维数值模型,模拟其封底情况,用FLAC3D内置接触面单元模拟封底混凝土与外盾体之间的接触面,探究考虑接触对模型计算结果的影响。结果表明: 1)仿真地层模拟系统设计合理,盾构主隧道内机械化施工泵房封底各试验结果均能符合预期要求,机械化封底注浆能够达到设计要求,能足以抵抗施工中的水压而不发生破坏,工艺具有可行性; 2)考虑接触面的影响后,对模型计算结果影响较大,能更准确地预测接触面的受力情况; 3)实际工程中的地下水压远低于试验设定水压,室内试验、数值模拟结果具有一定的安全储备,机械化施工泵房封底工艺应用于实际工程具有可行性。

关键词: 盾构隧道, 机械化施工, 竖井泵房封底, 室内试验, 高水压, 数值模拟, 接触面

Abstract:  To validate the feasibility of the construction technology of mechanized construction for wastewater pump room in shield tunnel and the reliability of the bottom sealing concrete of the pump room, an indoor test is designed to simulate and validate the safety of the bottom sealing concrete slab in the high water pressure deep stratum environment. Then, threedimensional(3D) finite difference software FLAC3D is employed to build a 3D numerical model to simulate the bottom sealing situation. The FLAC3D internal contact element is used to simulate the contact surface between the bottom sealing concrete and the outer shield body, and further examine the influence of considering the contact on the calculation results of the model. The results show the following: (1) The design of simulation system is reasonable, the test results of mechanized construction of pump room bottom sealing test in main shield tunnel can meet the expected requirements, and the mechanized bottom sealing grouting can meet the design requirements, indicating the feasibility of the technology. (2) The contact surface has a great influence on the calculation results of the model, resulting in a better prediction of the force of the contact surface. (3) Generally, the underground water pressure in the actual project is far lower than the test one, the results of the indoor test and numerical simulation have a certain safety reserve, and the sealing technology of the mechanized construction of pump room is feasible in the actual project.

Key words: shield tunnel, mechanized construction, bottom sealing of shaft pump room, laboratory test, high water pressure, numerical simulation, contact surface