Settlement Deformation and Construction Control of
Existing Tunnel
Induced By Underneath Crossing of Deep Drainage Shield Tunnel

doi:10.3973/j.issn.2096-4498.2023.S2.019

Tunnel Construction ›› 2023, Vol. 43 ›› Issue (S2): 169-177.DOI: 10.3973/j.issn.2096-4498.2023.S2.019

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Settlement Deformation and Construction Control of Existing Tunnel Induced By Underneath Crossing of Deep Drainage Shield Tunnel

ZHANG Xiaomei1, LU Fei1, CHEN Jianhang2, NIU Hongrong1, SU Dong2, 3, 4, *

(1. Qianhai Investment Holding, Shenzhen 518066, Guangdong, China; 2. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China; 3. Key Laboratory of Coastal Urban Resilient Infrastructures(MOE), Shenzhen University, Shenzhen 518060, Guangdong, China; 4. Shenzhen Key Laboratory of Green, Efficient and Intelligent Construction of Underground Metro Station, Shenzhen 518060, Guangdong, China)

Online:2023-12-30 Published:2024-03-27

Abstract

Abstract: To explore the settlement patterns of the existing tunnel structure inducted by underneath crossing of deep drainage shield tunnel and its relationship with construction control methods, a case study is conducted on the Shenzhen Qianhai-Nanshan drainage tunnel crossing underneath the existing Line 11. The essential construction factors affecting the settlement of the existing tunnel are analyzed based on field monitoring data and site conditions. The results reveal the following: (1) The settlement and deformation of the existing Line 11 tunnel is prominently correlated to construction stages and methods. (2) The unenven settlement occurs on the horizontal direction of the existing tunnel, whereas it cannot be found on roadbed. The settlement curve on the longitudinal direction presents a V shape or W shape. (3) Selecting rational soil chamber and grouting pressures and using secondary grouting and frequent supplementary grouting is conductive to settlement control of the existing structure.

Key words: shield tunnel, underneath crossing, existing tunnel, settlement, monitoring data, construction control

ZHANG Xiaomei, LU Fei, CHEN Jianhang, NIU Hongrong, SU Dong.

Settlement Deformation and Construction Control of Existing Tunnel Induced By Underneath Crossing of Deep Drainage Shield Tunnel [J]. Tunnel Construction, 2023, 43(S2): 169-177.

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Settlement Deformation and Construction Control of Existing Tunnel Induced By Underneath Crossing of Deep Drainage Shield Tunnel

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