|Table of Contents|

Influence of Reinforcement Thickness on Anti-floating of Large-diameter Shield Tunnel in Soft Soil Stratum(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年06期
Page:
163-169
Research Field:
软土隧道施工与变形控制
Publishing date:

Info

Title:
Influence of Reinforcement Thickness on Anti-floating of Large-diameter Shield Tunnel in Soft Soil Stratum
Author(s):
TAN Yi-jun1;  PENG Yuan-dong2;  LIU Shuang3;  SU Dong1; 4; 5;  LEI Guo-ping1
(1. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China; 2. China Railway 15 Bureau Group Co., Ltd., Shanghai 200070, China; 3. Zhuhai Dahengqin City New Center Development Co., Ltd., Zhuhai 519030, Guangdong, China;
Keywords:
large-diameter shield tunnel;  soft soil stratum;  reinforcement thickness;  lining up-floating
PACS:
TU472
DOI:
10.19815/j.jace.2021.08047
Abstract:
In order to study the influence of the reinforcement thickness of the soft soil foundation on the up-floating amount of the tunnel lining in soft soil stratum, a hardening small strain model(HSS Model)was selected as the constitutive model, and a finite element model of large-diameter shield tunnel was established by PLAXIS 3D software according to the Mangzhou tunnel project in Hengqin. The up-floating amount of the tunnel, the displacement of the soil at the river bottom, and the disturbed soil range around the tunnel were calculated and compared considering different reinforcement thicknesses. The results show that when the soft soil is not reinforced, the soil displacements from the numerical simulation are in good agreement with the two-dimensional analytical solution. Through the pre-reinforcement treatment of the soft soil, the reinforced soil and the tunnel lining work together to restrain the local tunnel floating. When the soft soil reinforcement thickness is 0.10D(D is the tunnel outer diameter), the vertical displacement of the soil at the river bottom and the floating amount of the tunnel lining is reduced by 32.8% and 36.4% respectively. With the increase of the reinforcement thickness, the floating amount of the tunnel and the area of the disturbed soil decrease gradually. For this project, when the reinforcement thickness is greater than 0.20D, the calculated maximum floating displacement of the tunnel lining is controlled within 30 mm, and the maximum vertical displacement of the soil at the river bottom is controlled within 20 mm. According to the relationship between the dislocation amount of lining joints and the floating amount of tunnel, the dislocation of lining joints can be controlled within 5 mm, meeting the requirements of the design standard.

References:

[1] 钱七虎,陈 健.大直径盾构掘进风险分析及对特大直径盾构挑战的思考[J].隧道建设:中英文,2021,41(2):157-164.
QIAN Qi-hu,CHEN Jian.Analysis of Tunneling Risks of Large-diameter Shield and Thoughts on Its Challenges[J].Tunnel Construction,2021,41(2):157-164.
[2]GB/T 50299—2018,地下铁道工程施工质量验收标准[S].
GB/T 50299—2018,Standard for Construction Quality Acceptance of Metro Engineering[S].
[3]叶俊能,刘 源,陈仁朋,等.盾构隧道管片施工期容许上浮量研究[J].岩石力学与工程学报,2014,33(增2):4067-4074.
YE Jun-neng,LIU Yuan,CHEN Ren-peng,et al.Study of the Permissible Value of Upward Floating for Segment in Shield Tunnel Construction[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(S2):4067-4074.
[4]林存刚,张忠苗,吴世明,等.软土地层盾构隧道施工引起的地面隆陷研究[J].岩石力学与工程学报,2011,30(12):2583-2592.
LIN Cun-gang,ZHANG Zhong-miao,WU Shi-ming,et al.Study of Ground Heave and Subsidence Induced by Shield Tunnelling in Soft Ground[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(12):2583-2592.
[5]魏 纲,洪 杰,魏新江.盾构隧道施工阶段管片上浮的力学分析[J].岩石力学与工程学报,2012,31(6):1257-1263.
WEI Gang,HONG Jie,WEI Xin-jiang.Mechanical Analysis of Segment Floating During Shield Tunnel Construction[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(6):1257-1263.
[6]叶 飞,朱合华,丁文其,等.大断面盾构隧道施工抗浮计算研究[J].地下空间与工程学报,2007,3(5):849-853.
YE Fei,ZHU He-hua,DING Wen-qi,et al.Analysis on Anti-buoyancy Calculation in Excavation of Big Cross-section Shield Tunnel[J].Chinese Journal of Underground Space and Engineering,2007,3(5):849-853.
[7]王道远,王锡朝,袁金秀,等.运河开挖卸载下水下盾构隧道纵向上浮量预测研究[J].现代隧道技术,2015,52(2):110-114,127.
WANG Dao-yuan,WANG Xi-chao,YUAN Jin-xiu,et al.Prediction of the Longitudinal Uplift of an Underwater Shield Tunnel During Canal Excavation[J].Modern Tunnelling Technology,2015,52(2):110-114,127.
[8]刘学彦,袁大军,姜 曦.基于抗浮稳定的盾构隧道合理覆土厚度研究[J].中国工程科学,2015,17(1):88-95.
LIU Xue-yan,YUAN Da-jun,JIANG Xi.Research on Depth of Earth Cover for Shield Tunnel Anti-buoyancy Security[J].Strategic Study of CAE,2015,17(1):88-95.
[9]黄旭民,黄林冲,梁 禹.施工期同步注浆影响下盾构隧道管片纵向上浮特征分析与应用[J/OL].岩土工程学报:1-9[2021-08-03].http://kns.cnki.net/kcms/detail/32.1124.TU.20210510.1706.012.html.
HUANG Xu-min,HUANG Lin-chong,LIANG Yu.Analysis and Application of the Longitudinal Characteristics of the Shield Tunnel Segments Uplift Affected by Synchronous Grouting During Construction[J/OL].Chinese Journal of Geotechnical Engineering:1-9[2021-08-03].http://kns.cnki.net/kcms/detail/32.1124.TU.20210510.1706.012.html.
[10]肖明清,孙文昊,韩向阳.盾构隧道管片上浮问题研究[J].岩土力学,2009,30(4):1041-1045,1056.
XIAO Ming-qing,SUN Wen-hao,HAN Xiang-yang.Research on Upward Moving of Segments of Shield Tunnel[J].Rock and Soil Mechanics,2009,30(4):1041-1045,1056.
[11]曾学艺,梁 禹,李 科,等.浅覆大直径越江盾构隧道施工阶段管片上浮分析及控制措施研究[J].铁道建筑,2017(5):71-75.
ZENG Xue-yi,LIANG Yu,LI Ke,et al.Study on Segment Floating and Its Control Measures During Construction of Large-diameter Cross River Shield Tunnel with Shallow Covering[J].Railway Engineering,2017(5):71-75.
[12]黄钟晖,舒 瑶,季 昌,等.基于等效梁模型的盾构隧道施工期管片上浮影响因素权重分析[J].隧道建设,2016,36(11):1295-1301.
HUANG Zhong-hui,SHU Yao,JI Chang,et al.Analysis of Weight of Influencing Factors of Shield Tunnel Segment Uplifting During Construction Based on Equivalent Beam Model[J].Tunnel Construction,2016,36(11):1295-1301.
[13]许有俊,陶连金,李文博,等.地铁上穿工程中既有隧道结构周围土体注浆加固范围研究[J].铁道建筑,2012(11):42-44.
XU You-jun,TAO Lian-jin,LI Wen-bo,et al.Study on Grouting Reinforcement Range of Soil Around Existing Tunnel Structure in Metro Overpass Project[J].Railway Engineering,2012(11):42-44.
[14]TYAGI A,LIU Y,PAN Y T,et al.Equivalent Strength for Tunnels in Cement-admixed Soil Columns with Spatial Variability and Positioning Error[J].Journal of Geotechnical and Geoenvironmental Engineering,2020,146(10):04020101.
[15]和晓楠,周晓敏,郭小红,等.深埋隧道注浆加固围岩非达西渗流场及应力场解析[J].中国公路学报,2020,33(12):200-211.
HE Xiao-nan,ZHOU Xiao-min,GUO Xiao-hong,et al.Analysis of Non-Darcy Seepage Field and Stress Field of Surrounding Rock Strengthened by Grouting in Deep Buried Tunnel[J].China Journal of Highway and Transport,2020,33(12):200-211.
[16]袁文军,张少钦.城市地铁越江隧道上浮引起的土体变形分析[J].现代隧道技术,2014,51(4):73-80.
YUAN Wen-jun,ZHANG Shao-qin.Analysis of Soil Deformation Induced by the Floating of a River-crossing Metro Tunnel[J].Modern Tunnelling Technology,2014,51(4):73-80.
[17]肖 立,张庆贺,赵天石,等.泥水盾构同步注浆材料试验研究[J].地下空间与工程学报,2011,7(1):59-64.
XIAO Li,ZHANG Qing-he,ZHAO Tian-shi,et al.Study on Mortar Material of Tail Void Grouting in Slurry Shield Tunnel[J].Chinese Journal of Underground Space and Engineering,2011,7(1):59-64.
[18]曾 斓,赵利平,张建球.沿海软基深层水泥搅拌桩复合地基工程性能室内模型试验研究[J].西部交通科技,2020(4):15-19.
ZENG Lan,ZHAO Li-ping,ZHANG Jian-qiu.Laboratory Model Test Study on Engineering Performance of Deep Cement Mixing Pile Composite Foundation in Coastal Soft Foundation[J].Western China Communications Science & Technology,2020(4):15-19.
[19]顾晓强,吴瑞拓,梁发云,等.上海土体小应变硬化模型整套参数取值方法及工程验证[J].岩土力学,2021,42(3):833-845.
GU Xiao-qiang,WU Rui-tuo,LIANG Fa-yun,et al.On HSS Model Parameters for Shanghai Soils with Engineering Verification[J].Rock and Soil Mechanics,2021,42(3):833-845.
[20]梁发云,贾亚杰,丁钰津,等.上海地区软土HSS模型参数的试验研究[J].岩土工程学报,2017,39(2):269-278.
LIANG Fa-yun,JIA Ya-jie,DING Yu-jin,et al.Experimental Study on Parameters of HSS Model for Soft Soils in Shanghai[J].Chinese Journal of Geotechnical Engineering,2017,39(2):269-278.

Memo

Memo:
-
Last Update: 2021-11-01