Measurement Analysis of Multi-Divisional
Foundation Pit Excavation and Deformation of Adjacent
Shield Tunnel

doi:10.3973/j.issn.2096-4498.2023.08.006

Tunnel Construction ›› 2023, Vol. 43 ›› Issue (8): 1316-1326.DOI: 10.3973/j.issn.2096-4498.2023.08.006

Previous Articles Next Articles

Measurement Analysis of Multi-Divisional Foundation Pit Excavation and Deformation of Adjacent Shield Tunnel

WEI Gang1, 2, GUO Binglai3, WU Haifeng4, WANG Zhe3, *, CHEN Bo5, SUN Bo3

(1. Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels, Hangzhou City University, Hangzhou 310015, Zhejiang, China; 2. Zhejiang Engineering Research Center of Intelligent Urban Infrastructure， Hangzhou City University, Hangzhou 310015, Zhejiang, China; 3. College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China; 4. Zhejiang Urban Construction Survey and Research Institute Co., Ltd., Hangzhou 311112, Zhejiang, China; 5. College of Information Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China)

Online:2023-08-20 Published:2023-09-11

Abstract

Abstract: In order to control the deformation of the adjacent shield tunnel caused by the excavation of the foundation pit in the neighboring zones, the monitoring data of foundation pit zones and their adjacent metro tunnel are analyzed to elucidate the influence of the law of foundation pit zoning excavation on the deformation of adjacent metro tunnel. Moreover, the effect of the foundation pit excavation on the adjacent tunnel is analyzed, and the connection between the pit deformation and the deformation of the adjacent tunnel is explored. The results reveal the following: (1) The shield tunnel′s longitudinal deformation growth is greater during the pit structure′s construction phase than during the pit′s excavation phase; the increased horizontal displacement during the construction of the structure is approximately three times the excavation phase. (2) There is a lag of approximately 60 days between the pit sidewalls′ development and the adjacent tunnel′s longitudinal deformation. However, the horizontal convergence of the tunnel has good consistency with the deformation law of the sidewall of the foundation pit.

Key words: foundation pit excavation, adjacent shield tunnel, multidivisional excavation, measurement analysis of deformation

WEI Gang, GUO Binglai, WU Haifeng, WANG Zhe, CHEN Bo, SUN Bo. Measurement Analysis of Multi-Divisional Foundation Pit Excavation and Deformation of Adjacent Shield Tunnel[J]. Tunnel Construction, 2023, 43(8): 1316-1326.

/ Recommend

[1]	RUAN Hengfeng, LIANG Rongzhu, KANG Cheng, LI Zhongchao, CAO Shi′an, DING Zhi. Elaborate Numerical Modeling of Metro Shield Tunnel Structure Deformation Induced by Lateral Foundation Pit Excavation [J]. Tunnel Construction, 2024, 44(S2): 245-255.
[2]	KONG Yueyue, WAN Qiwei, DING Haibin, ZHOU Yuelong, HUANG Zhanjun, XU Changjie. Optimal Design of DoubleBraced Supporting Structure in Asymmetric Excavation [J]. Tunnel Construction, 2023, 43(S1): 356-364.
[3]	YUAN Congcong, YUAN Zongyi, ZHAN Gangyi, XU Changjie, SHI Yufeng, GONG Honghua. Cantilevered Inclined LongShortPiles Support Performance Model for Sandy Soil Strata [J]. Tunnel Construction, 2022, 42(4): 664-671.
[4]	LIU Yayu, LIU Jiawan, WEI Gang, HUANG Rui. Study on Mechanical Deformation of Shield Tunnel Crosssection under Eccentric Unloading of Side Foundation Pit Excavation [J]. Tunnel Construction, 2020, 40(9): 1333-1340.
[5]	BU Kangzheng, ZHENG Xianchang, ZHANG Wanzhao, GUO Jinrui, SHEN Xiang. Calculation Method for Displacement of Existing Doubletube Metro Tunnel under Composite Foundation Induced by Foundation Pit Excavation [J]. Tunnel Construction, 2019, 39(5): 783-794.
[6]	LI Fangming, CHEN Guoxing. Study of Ground Surface Settlement of Foundation Pit with  Suspended Waterproof Curtain in Yangtze River Floodplain [J]. Tunnel Construction, 2018, 38(1): 33-40.
[7]	YANG Shidong, TANG Yanli, LIU Qingfang, LIU Ke, WANG Lin. Protection Technology for Underlaid Shield Tunnel: A Case Study of Ultraclose Foundation Pit Excavation [J]. Tunnel Construction, 2017, 37(S2): 35-46.
[8]	DAI Zhiren, WANG Tianming, DU Yu, WANG Ke, XIANG Yang. Influences of Unloading of Foundation Pit Excavation on Lower  Metro Tunnel in Sandygravel Strata and Its Countermeasures [J]. Tunnel Construction, 2017, 37(10): 1255-1261.
[9]	ZHAO Jun, GAN Penglu, SHEN Wenming, LIU Wei. Study on Influence of Excavation of Foundation Pit on  Deformation of Underlying Tunnel in Complex Ground [J]. Tunnel Construction, 2014, 34(2): 118-123.
[10]	PENG Qi，WANG Jianxin，LIU Jianguo. Analysis of Influence on Metro Tunnel Structure Caused by Foundation Pit Excavation, Considering Fluidsolid Coupling Effect [J]. Tunnel Construction, 2013, 33(7): 557-561.
[11]	LIU Suming, SHI Daqiang. Optimization of Construction Schemes of “Stationbridgecombined”  Metro Station Constructed by Cover and Cut Method [J]. Tunnel Construction, 2011, 31(6): 743-748.
[12]	ZHANG Guo-Liang, HAN Xue-Feng, LI Yuan-Hai, LIU Qiang-Fang. Numerical Simulation on Interaction between New Foundation Pit and Existing Metro Station [J]. Tunnel Construction, 2011, 31(3): 284-288.
[13]	ZHANG Guo-Liang, HAN Xue-Feng, LI Yuan-Hai, LIU Qiang-Fang. Numerical Simulation on Interaction between New Foundation Pit and Existing Metro Station [J]. Tunnel Construction, 2011, 31(3): 284-288.
[14]	ZHENG Da-Rong, ZHANG Cun, ZHANG Hui. Design and Construction of Retaining System of Xiangxing Road Station of Nanjing Metro [J]. Tunnel Construction, 2005, 25(5): 35-37,44.

Measurement Analysis of Multi-Divisional Foundation Pit Excavation and Deformation of Adjacent Shield Tunnel

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 14

Recommended Articles

Metrics

Comments