|Table of Contents|

Influence analysis of tunnel construction adjacent to pile group foundation based on HSS model(PDF)

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

Issue:
2023年02期
Page:
160-171
Research Field:
岩土工程
Publishing date:

Info

Title:
Influence analysis of tunnel construction adjacent to pile group foundation based on HSS model
Author(s):
WANG Buxiang1; 2;  ZHOU Dianwen1;  HAN Xu1;  ZHAO Jun1;  CAO Yapeng3;  WANG Shuang2; 4
(1. MCC Huatian Engineering & Technology Corporation of Nanjing,Nanjing 210019, Jiangsu, China; 2. College of Civil and Transportation Engineering, Hohai University, Nanjing 210024, Jiangsu, China; 3. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-environment and Resources of Chinese Academy of Sciences, Lanzhou 730000, Gansu, China; 4. Department of Railway Engineering, Nanjing Vocational Institute of Railway Technology, Nanjing 210031, Jiangsu, China)
Keywords:
shield tunnel;  pile group foundation;  HSS model;  displacement back analysis;  deformation;  stress
PACS:
TU473
DOI:
10.19815/j.jace.2022.03146
Abstract:
Relying on the pile group project passing through the adjacent side of the shield tunnel, a three-dimensional numerical analysis model was established. The small strain hardening model(HSS model)was adopted for the soil, and the model parameters were retrieved based on the existing research results and the monitoring displacement data. A series of construction process measures such as soil excavation, lining assembly and shield tail synchronous grouting were considered to compare and verify the simulation results with the monitoring data. Under different working conditions, the morphological distribution of surface settlement, the deformation of pile group foundation and the stress of foundation pile structure were studied, at the same time, the thickness sensitivity of equivalent layer of surface displacement was considered. The results show that HSS model can effectively predict the deformation caused by viaduct piles passing through the adjacent side of the tunnel, and the simulation results are in good agreement with the monitoring values.The tunnel excavation causes the soil to slide relative to the pile. The surface settlement and vertical displacement of the pile body increase with the increase of excavation progress within 1D(D is the outer diameter of the segment)before and after the center line, and the increase range is obviously decreasing. The surface settlement promoted by the two lines has a superposition effect, and the maximum settlement increases by 76.8%. The closer horizontal distance between tunnel and foundation pile, the greater change of foundation pile settlement. The increase of pile top settlement of two-line propulsion foundation pile is 134%. The variation trend of horizontal displacement of each row of piles in pile group is basically the same, and the horizontal displacement values of the same row of piles are almost coincident. Due to the shielding effect of pile group, the horizontal displacement value is taken as the front row pile, middle row pile and rear row pile from large to small. The horizontal displacement of pile body is mainly within 2.5D of central axis of shield, and the maximum horizontal displacement of pile body occurs near central axis of tunnel. The distribution law of bending moment and additional axial force along the pile body of the same row of piles in pile group is the same. The final additional force of the pile body is related to its distance from the tunnel. With the grouting filling rate of β increases, the thickness of equivalent layer and surface settlement decrease linearly. The construction technology scheme adopted in crossing section is effective, and the influence of nearby bending moment and additional axial force on the bearing capacity of pile foundation is estimated to be within the allowable range.

References:

[1] 张 云,殷宗泽,徐永福.盾构法隧道引起的地表变形分析[J].岩石力学与工程学报,2002,21(3):388-392.
ZHANG Yun,YIN Zongze,XU Yongfu.Analysis on three-dimensional ground surface deformations due to shield tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(3):388-392.
[2]方 勇,何 川.地铁盾构隧道施工对近接桩基的影响研究[J].现代隧道技术,2008,45(1):42-47.
FANG Yong,HE Chuan.Study on the influence of metro shield tunneling on close-by pile foundation[J].Modern Tunnelling Technology,2008,45(1):42-47.
[3]吴昌将,张子新,丁文其,等.盾构侧穿邻近古建筑的施工影响分析及保护措施加固效果的研究[J].岩土工程学报,2012,34(1):158-165.
WU Changjiang,ZHANG Zixin,DING Wenqi,et al.Influences of construction of side-crossing shield tunnel on adjacent ancient architectures and reinforcement effect of protection measures[J].Chinese Journal of Geotechnical Engineering,2012,34(1):158-165.
[4]袁海平,王 斌,朱大勇,等.盾构近距侧穿高架桥桩的施工力学行为研究[J].岩石力学与工程学报,2014,33(7):1457-1464.
YUAN Haiping,WANG Bin,ZHU Dayong,et al.Mechanical behaviours of a shield tunnel adjacent to existing viaduct pile foundations[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(7):1457-1464.
[5]郭一斌,张立明,郑 刚,等.盾构施工对大型立交桥超长桩工作性状的影响[J].岩土力学,2014,35(10):2941-2948,2957.
GUO Yibin,ZHANG Liming,ZHENG Gang,et al.Influence of shield tunneling on working performance of large interchange's super-long piles[J].Rock and Soil Mechanics,2014,35(10):2941-2948,2957.
[6]沈建文,刘 力.盾构隧道施工对临近桥桩影响数值及现场监测研究[J].岩土力学,2015,36(增2):709-714.
SHEN Jianwen,LIU Li.Numerical analysis and field monitoring for studying effects of shield tunnelling on nearby piles[J].Rock and Soil Mechanics,2015,36(S2):709-714.
[7]徐 硕,朱永全,徐 强,等.近距侧穿高铁桥桩盾构施工影响规律及加固措施[J].科学技术与工程,2021,21(31):13545-13551.
XU Shuo,ZHU Yongquan,XU Qiang,et al.Influence and reinforcement measures of shield construction of pile foundation for high-speed railway bridge in short distance[J].Science Technology and Engineering,2021,21(31):13545-13551.
[8]张邦通,王步翔,曹亚鹏.盾构隧道反复近接侧穿诱发高架桥桩及地层的变形分析[J].大连交通大学学报,2019,40(4):98-103.
ZHANG Bangtong,WANG Buxiang,CAO Yapeng.Analysis of pile and stratum deformation of viaduct induced by repeated close connection of shield tunnel[J].Journal of Dalian Jiaotong University,2019,40(4):98-103.
[9]李 松,杨小平,刘庭金.广州地铁盾构下穿对近接高架桥桩基的影响分析[J].铁道建筑,2012,52(7):74-78.
LI Song,YANG Xiaoping,LIU Tingjin.Analysis of influence of adjacent viaduct pile foundation by Guangzhou metro tunnel shield driving under passing[J].Railway Engineering,2012,52(7):74-78.
[10]徐中华,王卫东.敏感环境下基坑数值分析中土体本构模型的选择[J].岩土力学,2010,31(1):258-264,326.
XU Zhonghua,WANG Weidong.Selection of soil constitutive models for numerical analysis of deep excavations in close proximity to sensitive properties[J].Rock and Soil Mechanics,2010,31(1):258-264,326.
[11]王 磊,骆建军,高立平,等.地铁隧道斜穿施工对桥桩影响的数值分析[J].北京交通大学学报,2020,44(4):24-33.
WANG Lei,LUO Jianjun,GAO Liping,et al.Influence of subway tunnel oblique construction on bridge piles based on numerical analysis[J].Journal of Beijing Jiaotong University,2020,44(4):24-33.
[12]赵晓勇.地铁盾构隧道侧穿高铁桥群桩设置隔离桩影响分析[J].城市轨道交通研究,2021,24(5):116-120,126.
ZHAO Xiaoyong.Influence analysis of setting separation piles for metro shield tunnel side-crossing high-speed railway bridge pile groups[J].Urban Mass Transit,2021,24(5):116-120,126.
[13]李连祥,刘嘉典,李克金,等.济南典型地层HSS参数选取及适用性研究[J].岩土力学,2019,40(10):4021-4029.
LI Lianxiang,LIU Jiadian,LI Kejin,et al.Study of parameters selection and applicability of HSS model in typical stratum of Jinan[J].Rock and Soil Mechanics,2019,40(10):4021-4029.
[14]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 Xiaoqiang,WU Ruituo,LIANG Fayun,et al.On HSS model parameters for Shanghai soils with engineering verification[J].Rock and Soil Mechanics,2021,42(3):833-845.
[15]MAIR R J.Developments in geotechnical engineering research:application to tunnels and deep excavations[J].Proceedings of the Institurion of Civil Engineers-Civil Engineering,1993,97(1):27-41.
[16]MITCHELL J K,SOGA K.Fundamentals of soil behavior[M].3rd ed.Hoboken:John Wiley & Sons,2005.
[17]BENZ T.Small-strain stiffness of soils and its numerical consequences[M].Stuttgart:University of Stuttgart,2007.
[18]BENZ T,SCHWAB R,VERMEER P.Small-strain stiffness in geotechnical analyses[J].Bautechnik,2009,86(S1):16-27.
[19]SCHWEIGER H F,VERMEER P A,WEHNERT M.On the design of deep excavations based on finite element analysis[J].Geomechanics and Tunnelling,2009,2(4):333-344.
[20]ROWE R K,LO K Y,KACK G J.A method of estimating surface settlement above tunnels constructed in soft ground[J].Canadian Geotechnical Journal,1983,20(1):11-22.
[21]ROWE R K,LEE K M.Subsidence owing to tunnelling.II.Evaluation of a prediction technique[J].Canadian Geotechnical Journal,1992,29(6):941-954.
[22]朱才辉,李 宁,柳厚祥,等.盾构施工工艺诱发地表沉降规律浅析[J].岩土力学,2011,32(1):158-164.
ZHU Caihui,LI Ning,LIU Houxiang,et al.Analysis of ground settlement induced by workmanship of shield tunnelling[J].Rock and Soil Mechanics,2011,32(1):158-164.
[23]朱合华,丁文其,李晓军.盾构隧道施工力学性态模拟及工程应用[J].土木工程学报,2000,33(3):98-103.
ZHU Hehua,DING Wenqi,LI Xiaojun.Construction simulation for the mechanical behavior of shield tunnel and its application[J].China Civil Engineering Journal,2000,33(3):98-103.
[24]基坑工程技术标准:DG/TJ 08-61—2018[S].上海:同济大学出版社,2018.
Technical code for excavation engineering:DG/TJ 08-61—2018[S].Shanghai:Tongji University Press,2018.
[25]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 Fayun,JIA Yajie,DING Yujin,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.
[26]刘 畅.考虑土体不同强度与变形参数及基坑支护空间影响的基坑支护变形与内力研究[D].天津:天津大学,2008.
LIU Chang.Analysis of deformation and stress due to deep excavation considering different deformation and strength parameters of soil and space effect of excavation and retaining structure[D].Tianjin:Tianjin University,2008.
[27]姜晓婷,路 平,郑 刚,等.天津软土地区盾构掘进对上方建筑物影响分析[J].岩土力学,2014,35(增2):535-542.
JIANG Xiaoting,LU Ping,ZHENG Gang,et al.Influences on surface structure induced by shield tunneling in Tianjin soft ground area[J].Rock and Soil Mechanics,2014,35(S2):535-542.
[28]朱逢斌,杨 平,ONG C W.盾构隧道开挖对邻近桩基影响数值分析[J].岩土工程学报,2008,30(2):298-302.
ZHU Fengbin,YANG Ping,ONG C W.Numerical analysis on influence of shield tunnel excavation to neighboring piles[J].Chinese Journal of Geotechnical Engineering,2008,30(2):298-302.
[29]韩秋石.盾构隧道下穿施工对既有桥梁桩基础的影响及其控制技术研究[D].西安:长安大学,2015.
HAN Qiushi.Study on the effect of construction that shield tunnel down-traversing the pile foundation of existing bridge and its control technology[D].Xi'an:Chang'an University,2015.
[30]宋慧林.地铁隧道侧穿既有桥梁桩基影响研究[D].北京:北京交通大学,2017.
SONG Huilin.Impact analysis of pile foundation in metro tunnel underneath existing bridge[D].Beijing:Beijing Jiaotong University,2017.

Memo

Memo:
-
Last Update: 2023-03-20