Influence of proximity construction of a new pile foundation on adjacent metro tunnel

Authors

JIN Shengji, School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, ChinaFollow
MU Anxin, School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China
BI Bo, School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China
XU Chao, School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China
YU He, School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China

Abstract

The construction of a bridge pile foundation and cap not only causes disturbance to its foundation and surrounding soil but also has a certain influence on adjacent existing structures. In order to study the influence of new pile foundation proximity construction on tunnels adjacent to subway sections, this paper took the pile foundation construction process of auxiliary bridge extension on both sides of Shenyang Changqing Bridge as the research object and adopted Midas/GTS finite element numerical simulation and construction monitoring methods to study the influence of new pile foundation proximity construction on tunnels adjacent to subway sections. The results show that: ① In the construction process, the vertical settlement and horizontal convergence of subway tunnel generally show the trend of subsidence and inward convergence, and the settlement caused by it is more obvious; ② The deformation characteristics of subway tunnel are related to various factors, but the influence of the clear distance between adjacent structures is the most significant. A small distance from the construction area indicates greater deformation; ③ In the selection of the construction scheme of straddle pile layout and unilateral pile layout, according to the comparison of the maximum settlement value of the tunnel arch, the impact of straddle cap on the tunnel arch displacement is less, and the safety of the tunnel construction near the subway section is easier to be guaranteed. The research shows that in the close range of existing structures, the construction of new structures must ensure sufficient safety distance and take effective safety measures to reduce the impact.

Publication Date

7-14-2023

DOI

10.14048/j.issn.1671-2579.2023.03.030

First Page

191

Last Page

197

Submission Date

March 2025

Recommended Citation

Shengji, JIN; Anxin, MU; Bo, BI; Chao, XU; and He, YU (2023) "Influence of proximity construction of a new pile foundation on adjacent metro tunnel," Journal of China & Foreign Highway: Vol. 43: Iss. 3, Article 30.
DOI: 10.14048/j.issn.1671-2579.2023.03.030
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss3/30

Reference

[1] 宋玉芹, 林永亮. 大直径盾构隧道近距离穿越桩基的方案比选[J]. 中外公路, 2020, 40(6): 231-236. SONG Yuqin, LIN Yongliang. Scheme comparison of large diameter shield tunnels crossing pile foundations[J]. Journal of China & Foreign Highway, 2020, 40(6): 231-236. [2] 程永欢. 新建桥梁桩基对既有地铁隧道影响的数值分析[J]. 天津建设科技, 2020, 30(2): 30-33. CHENG Yonghuan. Numerical analysis of influence on pile foundation of new bridge on existing subway tunnel[J]. Tianjin Construction Science and Technology, 2020, 30(2): 30-33. [3] 郭双喜, 金平, 汲广坤, 等. 复合地层盾构上方建筑物沉降特征及原因[J]. 中外公路, 2020, 40(3): 16-21. GUO Shuangxi, JIN Ping, JI Guangkun, et al. Settlement characteristics and reasons of buildings above shield tunnel in mix ground[J]. Journal of China & Foreign Highway, 2020, 40(3): 16-21. [4] 许桂生. 大跨浅埋暗挖隧道近接桥桩施工扰动影响及控制技术研究[J]. 中外公路, 2019, 39(1): 185-189. XU Guisheng. Study on influence of construction disturbance and control technology of construction of near bridge piles in large span shallow-buried excavation tunnel[J]. Journal of China & Foreign Highway, 2019, 39(1): 185-189. [5] 陈发东. 盾构隧道施工对临近桥梁桩基及周围土体影响的模拟研究[J]. 中外公路, 2018, 38(6): 177-181. CHEN Fadong. Research on influence of shield tunnel construction making on bridge pile foundation and surrounding soils[J]. Journal of China & Foreign Highway, 2018, 38(6): 177-181. [6] 丁智, 张霄, 周联英, 等. 近距离桥桩与地铁隧道相互影响研究及展望[J]. 浙江大学学报(工学版), 2018, 52(10): 1943-1953+1979. DING Zhi, ZHANG Xiao, ZHOU Lianying, et al. Research and prospect of interaction between close bridge pile and metro tunnel[J]. Journal of Zhejiang University (Engineering Science), 2018, 52(10): 1943-1953+1979. [7] 吕宝伟. 超临界桥桩基施工对既有隧道影响数值与实测分析[J]. 铁道标准设计, 2017, 61(3): 103-107. LV Baowei. Monitoring and numerical analysis of the impact of supercritical bridge pile foundation on existing tunnel[J]. Railway Standard Design, 2017, 61(3): 103-107. [8] 杨敏, 靳军伟. 桩基础与既有地铁隧道相互影响的研究进展[J]. 建筑结构学报, 2016, 37(8): 90-100. YANG Min, JIN Junwei. Research progress on interaction of pile foundation with nearby existing subway tunnel[J]. Journal of Building Structures, 2016, 37(8): 90-100. [9] YOO C. Three dimensional numerical investigation on the effect of bridge construction on existing tunnel[J]. KSCE Journal of Civil Engineering, 2014, 18(3): 794-802. [10] 金生吉, 陈华, 于贺, 等. 沈阳快速干线隧道深基坑施工监测与分析[J]. 中外公路, 2018, 38(1): 220-224. JIN Shengji, CHEN Hua, YU He, et al. Monitoring and analysis on tunnel deep foundation construction of Shenyang fast trunk-line[J]. Journal of China & Foreign Highway, 2018, 38(1): 220-224. [11] 黄国超. 某立交桥梁桩基础施工对既有地铁隧道影响的数值模拟研究[D]. 广州: 华南理工大学, 2015. HUANG Guochao. Numerical simulation study on the influence of pile foundation construction of an overpass bridge on existing subway tunnel[D]. Guangzhou: South China University of Technology, 2015. [12] 路平, 郑刚. 立交桥桩基础施工及运营期对既有隧道影响的研究[J]. 岩土工程学报, 2013, 35(S2): 923-927. LU Ping, ZHENG Gang. Study on the influence of overpass pile foundation construction and operation period on existing tunnels[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(S2): 923-927.