Theoretical research on shield tunnels with different diameters crossing through existing tunnels in saturated soil area

被引：1

作者：

Ding Z. ^{[1
,2
]}

Zhang M. ^{[3
,4
]}

Zhang X. ^{[3
]}

Wei X. ^{[1
,2
]}

Shen W. ^{[5
]}

Zhou J. ^{[6
]}

机构：

[1] Department of Civil Engineering, Hangzhou City University, Hangzhou

[2] Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels of Zhejiang Province, Hangzhou

[3] College of Civil Engineering and Architecture, Zhejiang University, Hangzhou

[4] Zhejiang Province Institute of Architectural Design and Research, Hangzhou

[5] CREEC East China Survey and Design Co. Ltd., Hangzhou

[6] Ningbo Rail Transit Group Co. Ltd., Ningbo

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2024年 / 55卷 / 04期

基金：

中国国家自然科学基金;

关键词：

excavation face; large diameters; saturated soil; shield crossing; shield tunnel;

D O I：

10.11817/j.issn.1672-7207.2024.04.017

中图分类号：

学科分类号：

摘要：

With the diversified development of spatial sections of urban subway tunnel, existing tunnels inevitably face the huge risk of shield tunnel crossing with different diameters. Based on the initial value solution of semi-infinite saturated soil, considering the diameter and type of shield machine, the corrected calculation methods for the additional thrust on the shield excavation face, the friction of shield shell, the grouting pressure of the shield tail and other construction factors were given. The calculation formula of the vertical deformation of the existing tunnel caused by shield tunnel crossing with different diameters in saturated soft soil area was deduced. The results show that compared with previous calculation methods in the literature, the proposed calculation method is more advantageous in predicting the deformation of the existing tunnel caused by the crossing of the large-diameter shield in saturated soil. When the shield tunnel obliquely passes through the existing tunnel, the longitudinal settlement tank will be skewed, and the deformation of the existing tunnel tends to be stable after the shield leaves the tunnel axis by 4.5 times the length of shield machine. The difference in the stability principle of the excavation face of different types of shield machines is the key factor affecting the calculation results. The additional thrust on the shield excavation face considering the mud weight distribution is more sensitive to the change of the shield diameter than that in the consideration of squeezing effect. © 2024 Central South University of Technology. All rights reserved.

引用

页码：1447 / 1462

页数：15

共 39 条

[1]

SHI Chenghua, ZHENG Xiaoyue, WANG Zuxian, Et al., Random analysis method for longitudinal deformation of existing shield tunnels induced by new tunnelling underpass considering geological uncertainty, Journal of Central South University(Science and Technology), 55, 2, (2024)

[2]

HONG Kairong, DU Yanliang, CHEN Kui, Et al., Full-face tunnel boring machines(shields/TBMs) in China: history, achievements, and prospects, Tunnel Construction, 42, 5, (2022)

[3]

HUANG Dezhong, MA Xianfeng, WANG Junsong, Et al., Centrifuge modelling of effects of shield tunnels on existing tunnels in soft clay, Chinese Journal of Geotechnical Engineering, 34, 3, (2012)

[4]

WANG Yan, Cause analysis and control research on ultra-limit of deformation of the existing tunnel undercrossed by shield tunnel, (2015)

[5]

SONG Xingbao, Construction technology of large diameter slurry balanced shield machine closely passing through rail transit interval tunnel in operation, Tunnel and Rail Transit, 4, pp. 29-34, (2019)

[6]

WU Changsheng, ZHU Zhiduo, Statistical analysis of ground loss ratio caused by different tunnel construction methods in China, Journal of Zhejiang University (Engineering Science), 53, 1, (2019)

[7]

JIN Dalong, YUAN Dajun, LI Xinggao, Et al., Analysis of the settlement of an existing tunnel induced by shield tunneling underneath[J], Tunnelling and Underground Space Technology, 81, (2018)

[8]

LIN Xingtao, CHEN Renpeng, WU Huaina, Et al., Deformation behaviors of existing tunnels caused by shield tunneling undercrossing with oblique angle[J], Tunnelling and Underground Space Technology, 89, (2019)

[9]

LAI Hongpeng, ZHENG Haiwei, CHEN Rui, Et al., Settlement behaviors of existing tunnel caused by obliquely under-crossing shield tunneling in close proximity with small intersection angle, Tunnelling and Underground Space Technology, 97, (2020)

[10]

DING Zhi, ZHANG Mobao, ZHANG Xiao, Et al., Theoretical analysis on the deformation of existing tunnel caused by under-crossing of large-diameter slurry shield considering construction factors, Tunnelling and Underground Space Technology, 133, (2023)

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