Monitoring and analysis of ground settlement during pipe roof construction of pipe-jacking groups in soft soil areas
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摘要: 依托上海14号线桂桥路站管幕段实例工程,对管幕群顶管顶进施工过程地面沉降情况进行监测,分析群顶管施工对地面沉降的影响,在此过程中对本工程采用水土分算或合算进行讨论。根据顶进过程实际工况和监测数据,分析管幕群顶管施工影响地面的原因,提出相应控制措施。结果表明：①管幕群顶管施工引起最大地面沉降出现在始发井出加固区区域;②在本工程中采用水土合算计算正面土压力较为符合实际情况;③管幕群顶管施工过程中影响地面变形的因素主要包括前舱压力、顶进速度、洞门止水、管壁摩擦和同步注浆等方面。Abstract: Based on the example project of the pipe roof section of Guiqiao Road Station on Shanghai Line 14, the ground settlement of the pipe roof is monitored during pipe-jacking construction process. At the same time, the influences of pipe-jacking group construction on the ground settlement are analyzed, and the methods for calculating the water pressure and soil pressure are discussed. According to the actual working conditions and the monitoring data of the jacking process, the reasons for the influences of the pipe-jacking construction on the ground are analyzed, and the corresponding control measures are proposed. Some conclusions are drawn as follows: (1) The maximum ground settlement caused by the pile jacking construction occurs in the area outside the reinforcement zone. (2) The calculation of the frontal soil pressure using water and soil is more in line with the actual situation in this project. (3) The factors affecting the ground deformation during the pipe jacking construction process mainly include the front cabin pressure, the jacking speed, the tightness of the hole, the pipe friction and the synchronous grouting.
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Keywords:
- soft soil area /
- pipe roof /
- pipe-jacking group /
- monitoring /
- settlement
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[1] 关永平. 地铁暗挖车站STS管幕支护结构的力学性能研究[D]. 沈阳: 东北大学, 2015.
(GUAN Yong-ping.Research on mechanical property of the STS structure used to construct shallow buried subway station[D]. Shenyang: Northeastern University, 2015. (in Chinese))[2] 刘应亮. 大直径曲线管幕顶进过程中地层变形控制及监测[J]. 现代隧道技术, 2017, 54(6): 210-216.
(LIU Ying-liang.Control and monitoring of ground deformation during jacking of a large-diameter curved tabular roof[J]. Journal of Northeastern University, 2017, 54(6): 210-216. (in Chinese))[3] 李慎刚, 韩健勇, 石建军, 等. STS新管幕工法钢管顶进现场试验[J]. 东北大学学报, 2016, 37(10): 1469-1473.
(LI Shen-gang, HAN Jian-yong, SHI Jian-jun, et al.Field test on steel pipe jacking by STS method[J]. Rock and Soil Mechanics, 2016, 37(10): 1469-1473. (in Chinese))[4] 陈韶章, 苏宗贤. 韩国最大暗挖地铁车站施工技术[J]. 施工技术, 2012, 41(2): 46-49, 101.(CHEN Shao-zhang, SU Zong-xian. The largest tunnel station in Korea the express bus terminal subway station, Lot 913, Seoul Subway Line 9[J]. Construction Technology, 2012, 41(2): 46-49, 101. (in Chinese)) [5] 黎永索, 张可能, 黄常波, 等. 管幕预筑隧道地表沉降分析[J]. 岩土力学, 2011, 32(12): 3701-3707.
(LI Yong-suo, ZHANG Ke-neng, HUANG Chang-bo, et al.Analysis of surface subsidence of tunnel built by pipe-roof pre-construction method[J]. Rock and Soil Mechanics, 2011, 32(12): 3701-3707. (in Chinese))
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