Centrifugal Test and Numerical Analysis of Impact of Surface Surcharge on Existing Tunnels

doi:10.16183/j.cnki.jsjtu.2020.412

Abstract

Abstract:

Surface surcharge has a significant impact on the safety and stability of existing underground tunnels, and relevant regulations in soft clay areas have very strict restrictions on the tunnel displacement caused by surface surcharge. In order to accurately assess the impact of surface surcharge on the tunnel displacement in soft clay areas, the influence of surface surcharge on tunnel displacement and soil deformation is studied by using the centrifugal model test, and a corresponding finite element model is established based on the centrifugal model test. The parameter values of the soil constitutive model are determined by indoor soil tests. From the aspects of soil strain and shear stiffness, the applicability of the HS model and the HSS model in the analysis of the soft clay surface surcharge problem is compared and analyzed. Based on the result, the influence of surface surcharge on the deformation of soft clay formation and tunnel displacement is further discussed while comprehensively considering the size of the surface surcharge and the location of the tunnel. The results can provide some reference for engineering design.

Key words: surface surcharge, centrifugal model test, small-strain constitutive model, numerical simulation

CLC Number:

U459

LIU Jinhao, YAN Yuanzhong, ZHANG Qi, BIAN Rong, HE Lei, YE Guanlin. Centrifugal Test and Numerical Analysis of Impact of Surface Surcharge on Existing Tunnels[J]. Journal of Shanghai Jiao Tong University, 2022, 56(7): 886-896.

Figures/Tables 25

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Tab.1

Parameters of constitutive model

地层	c/kPa	ϕ/(°)	$E o e d r e f$ /MPa	$E 50 r e f$ /MPa	$E u r r e f$ /MPa	G₀/MPa	γ_0.7×10⁴	ψ/(°)	p^ref/kPa	R_f	K₀	m	ν_ur
4-1	10	25	2.15	2.58	14.5	27.0	2.7	0	100	0.7	0.57	1	0.3

Tab.1

Tab.2

Fig.9

Fig.10

Fig.11

Fig.12

Fig.13

Fig.14

Fig.15

Fig.16

Fig.17

Fig.18

Fig.19

Fig.20

Fig.21

Fig.22

Fig.23

References 27

[1]	SHIAU J, AL-ASADI F. Three-dimensional analysis of circular tunnel headings using broms and bennermark’s original stability number[J]. International Journal of Geomechanics, 2020, 20(7): 06020015. doi: 10.1061/(ASCE)GM.1943-5622.0001734 URL
[2]	YANG F, SUN X L, ZOU J H, et al. Analysis of an elliptical tunnel affected by surcharge loading[J]. Proceedings of the Institution of Civil Engineers-Geotechnical Engineering, 2019, 172(4): 312-319. doi: 10.1680/jgeen.16.00122 URL
[3]	TIWARI B, YE G L, LI M G, et al. Strength and dilatancy behaviors of deep sands in Shanghai with a focus on grain size and shape effect[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2020, 12(6): 1214-1225. doi: 10.1016/j.jrmge.2020.01.010 URL
[4]	刘庭金, 陈思威, 叶振威. 堆载诱发盾构隧道病害及结构安全分析[J]. 铁道工程学报, 2019, 36(11): 67-73.
	LIU Tingjin, CHEN Siwei, YE Zhenwei. Analysis of disease and structural safety of shield tunnel under accidental surface surcharge[J]. Journal of Railway Engineering Society, 2019, 36(11): 67-73.
[5]	邵华, 黄宏伟, 张东明, 等. 突发堆载引起软土地铁盾构隧道大变形整治研究[J]. 岩土工程学报, 2016, 38(6): 1036-1043.
	SHAO Hua, HUANG Hongwei, ZHANG Dongming, et al. Case study on repair work for excessively deformed shield tunnel under accidental surface surcharge in soft clay[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(6): 1036-1043.
[6]	李卫超, 朱碧堂, 张俊峰, 等. 物流仓库大面积堆载危害及规范法预测沉降问题讨论[J]. 建筑结构学报, 2021, 42(5): 187-194.
	LI Weichao, ZHU Bitang, ZHANG Junfeng, et al. Damage of logistics warehouses due to large area loading and discussion on settlement prediction using China technical codes[J]. Journal of Building Structures, 2021, 42(5): 187-194.
[7]	WANG H N, CHEN X P, JIANG M J, et al. The analytical predictions on displacement and stress around shallow tunnels subjected to surcharge loadings[J]. Tunnelling and Underground Space Technology, 2018, 71: 403-427. doi: 10.1016/j.tust.2017.09.015 URL
[8]	梁发云, 袁强, 李家平, 等. 堆载作用下土体分层特性对地铁隧道纵向变形的影响研究[J]. 岩土工程学报, 2020, 42(1): 63-71.
	LIANG Fayun, YUAN Qiang, LI Jiaping, et al. Influences of soil characteristics on longitudinal deformation of shield tunnels induced by surface surcharge[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(1): 63-71.
[9]	黄大维, 周顺华, 赖国泉, 等. 地表超载作用下盾构隧道劣化机理与特性[J]. 岩土工程学报, 2017, 39(7): 1173-1181.
	HUANG Dawei, ZHOU Shunhua, LAI Guoquan, et al. Mechanisms and characteristics for deterioration of shield tunnels under surface surcharge[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(7): 1173-1181.
[10]	张明告, 周顺华, 黄大维, 等. 地表超载对地铁盾构隧道的影响分析[J]. 岩土力学, 2016, 37(8): 2271-2278.
	ZHANG Minggao, ZHOU Shunhua, HUANG Dawei, et al. Analysis of influence of surface surcharge on subway shield tunnel under[J]. Rock and Soil Mechanics, 2016, 37(8): 2271-2278.
[11]	ALI A, LYAMIN A V, HUANG J S, et al. Undrained stability of a single circular tunnel in spatially variable soil subjected to surcharge loading[J]. Computers and Geotechnics, 2017, 84: 16-27. doi: 10.1016/j.compgeo.2016.11.013 URL
[12]	DE A, NIEMIEC A, ZIMMIE T F. Pore-pressure development near tunnel due to underwater explosion from centrifuge tests[J]. International Journal of Physical Modelling in Geotechnics, 2021, 21(5): 234-250. doi: 10.1680/jphmg.19.00037 URL
[13]	BAZIAR M H, NABIZADEH A, KHALAFIAN N, et al. Evaluation of reverse faulting effects on the mechanical response of tunnel lining using centrifuge tests and numerical analysis[J]. Géotechnique, 2020, 70(6): 490-502. doi: 10.1680/jgeot.18.P.019 URL
[14]	李青, 徐中华, 王卫东, 等. 上海典型黏土小应变剪切模量现场和室内试验研究[J]. 岩土力学, 2016, 37(11): 3263-3269.
	LI Qing, XU Zhonghua, WANG Weidong, et al. Field and laboratory measurements on shear modulus of typical Shanghai clay at small strain[J]. Rock and Soil Mechanics, 2016, 37(11): 3263-3269.
[15]	于亚磊, 叶冠林, 熊永林. 上海第4层黏土力学特性的弹塑性本构模拟[J]. 岩土力学, 2016, 37(9): 2541-2546.
	YU Yalei, YE Guanlin, XIONG Yonglin. Elastoplastic constitutive modelling for mechanical behavior of Shanghai 4th layer clay[J]. Rock and Soil Mechanics, 2016, 37(9): 2541-2546.
[16]	杨同帅, 叶冠林, 顾琳琳. 上海软土小应变三轴试验及本构模拟[J]. 岩土工程学报, 2018, 40(10): 1930-1935.
	YANG Tongshuai, YE Guanlin, GU Linlin. Small-strain triaxial tests and constitutive modeling of Shanghai soft clays[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(10): 1930-1935.
[17]	付亚雄, 贺雷, 马险峰, 等. 软黏土地层盾构隧道开挖面稳定性离心试验研究[J]. 地下空间与工程学报, 2019, 15(2): 387-393.
	FU Yaxiong, HE Lei, MA Xianfeng, et al. Centrifuge model tests on face stability of shield tunneling in soft clay[J]. Chinese Journal of Underground Space and Engineering, 2019, 15(2): 387-393.
[18]	WANG Z T, ZHANG Y, YU L, et al. Centrifuge modelling of active pipeline-soil loading under different impact angle in soft clay[J]. Applied Ocean Research, 2020, 98: 102129. doi: 10.1016/j.apor.2020.102129 URL
[19]	MOUSSAEI N, KHOSRAVI M H, HOSSAINI M F. Physical modeling of tunnel induced displacement in sandy grounds[J]. Tunnelling and Underground Space Technology, 2019, 90: 19-27. doi: 10.1016/j.tust.2019.04.022 URL
[20]	YE G L, YE B. Investigation of the overconsolidation and structural behavior of Shanghai clays by element testing and constitutive modeling[J]. Underground Space, 2016, 1(1): 62-77. doi: 10.1016/j.undsp.2016.08.001 URL
[21]	王建华, 张璐璐, 陈锦剑. 土力学与地基基础[M]. 北京: 中国建筑工业出版社, 2011.
	WANG Jianhua, ZHANG Lulu, CHEN Jinjian. Soil mechanics and foundations[M]. Beijing: China Architecture & Building Press, 2011.
[22]	DEHGHANBANADAKI A, MOTAMEDI S, AHMAD K. FEM-based modelling of stabilized fibrous peat by end-bearing cement deep mixing columns[J]. Geomechanics and Engineering, 2020, 20(1): 75-86.
[23]	LU K K, YIN J H, LO S C. Modeling small-strain behavior of Hong Kong CDG and its application to finite-element study of basement-raft footing[J]. International Journal of Geomechanics, 2018, 18(9): 04018104.
[24]	陈超斌, 叶冠林. 基于LVDT的小应变三轴仪研制及其软土试验应用[J]. 岩土力学, 2018, 39(6): 2304-2310.
	CHEN Chaobin, YE Guanlin. Development of small-strain triaxial apparatus using LVDT sensors and its application to soft clay test[J]. Rock and Soil Mechanics, 2018, 39(6): 2304-2310.
[25]	CHOO H, VAN NGO L, KIM T, et al. Compression index and small strain stiffness of six coal bottom ashes in south Korea[J]. KSCE Journal of Civil Engineering, 2020, 24(12): 3584-3593. doi: 10.1007/s12205-020-1608-7 URL
[26]	SHI J Q, HAEGEMAN W, CNUDDE V. Anisotropic small-strain stiffness of calcareous sand affected by sample preparation, particle characteristic and gradation[J]. Géotechnique, 2021, 71(4): 305-319. doi: 10.1680/jgeot.18.P.348 URL
[27]	王卫东, 王浩然, 徐中华. 上海地区基坑开挖数值分析中土体HS-Small模型参数的研究[J]. 岩土力学, 2013, 34(6): 1766-1774.
	WANG Weidong, WANG Haoran, XU Zhonghua. Study of parameters of HS-Small model used in numerical analysis of excavations in Shanghai area[J]. Rock and Soil Mechanics, 2013, 34(6): 1766-1774.