[1]李 浩,刘 毅,彭 振,等.边坡偏压对于邻近地铁车站基坑稳定性影响分析[J].西安建筑科技大学学报(自然科学版),2020,52(03):359-365.[doi:10.15986/j.1006-7930.2020.03.008]
　LI Hao,LIU Yi,PENG Zhen,et al.Analysis on the stability of metro foundation pit under bias pressure from the adjacent slope[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(03):359-365.[doi:10.15986/j.1006-7930.2020.03.008]
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边坡偏压对于邻近地铁车站基坑稳定性影响分析()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年03期
页码:
359-365
栏目:
出版日期:
2020-06-30

文章信息/Info

Title:
Analysis on the stability of metro foundation pit under bias pressure from the adjacent slope
文章编号:
1006-7930(2020)03-0359-07
作者:
李 浩1;  刘 毅2;  彭 振1;  唐晓杰3; 4;  李元海3; 4
(1.中交(广州)建设有限公司,广东 广州 511458; 2.中交第二航务工程局有限公司 技术中心,湖北 武汉 430040; 3.中国矿业大学 力学与土木工程学院,江苏 徐州 221116; 4.中国矿业大学 深部岩土力学与地下工程国家重点实验室,江苏 徐州 221116)
Author(s):
LI Hao1;  LIU Yi2;  PENG Zhen1;  TANG Xiaojie3;  4;  LI Yuanhai3;  4
(1.China Communications Construction Company(Guangzhou)Ltd., Guangzhou 511458 China; 2.Technology Center, CCCC Second Harbor Engineering Company Ltd., Wuhan 430040 China; 3.School of Mechanics and Civil Engineering, China University of Mining and Technology, Jiangsu Xuzhou 221116, China; 4.State Key Laboratory for Geomechanics& Deep Underground Engineering, Jiangsu Xuzhou 221116 China)
关键词:
车站基坑;  邻近边坡;  稳定性;  数值模拟
Keywords:
station foundation pit;  adjacent to slope;  construction stability;  numerical simulation
分类号:
TU 231
DOI:
10.15986/j.1006-7930.2020.03.008
文献标志码:
A
摘要:
随着城市地铁线路穿越山地环境的日益增多,邻近边坡作为一种不利于施工的边界条件变得越发难以避免.边坡偏压影响下地铁车站基坑稳定性分析对于支护参数的选取与工程安全的控制具有重要意义.本文依托深圳轨道交通2号线莲塘口岸站工程,通过建立FLAC二维模型对不同偏压条件下的地表沉降、围护桩变形及剪应力变化规律进行分析.结果表明:地表沉降范围及最大沉降值均随边坡高度的增加而增大,偏压变化对于远坡桩的变形影响较小,但对于近坡桩的影响尤为明显.为定量分析偏压影响下地表及围护桩的变形规律,对结果进行了数据拟合并获得了地表最大沉降值、围护桩桩顶变形、围护桩最大变形及剪应力与边坡高度的关系公式.此外,分析表明随边坡高度的增加,基坑围护墙体的最大剪应力分布于基坑底部,此种情况在工程中需给予重点关注.
Abstract:
As more and more urban metro lines are designed to run through the mountainous environment, the situation of foundation pit set adjacent to the slope becomes more difficult to be avoided, which is an unfavorable boundary condition for construction.Ground settlement, pile deformation, and shear stress distribution under different bias pressure were analyzed in this paper based on 2D FLAC model.Simulated background and analysis parameters were set based on the practical project of Lian-Tang-Kou-An metro station of No.2 rail line in Shenzhen.Results show that the surface settlement scope and maximum settlement value increase as slope height, and the bias condition has lesser effect on the deformation of the far-slope pile than that of the near slope.In order to quantitatively analyze the deformation law under the influence of bias pressure, the data of simulation results were fitted to obtain the formula relationship between the slope height and the other parameters in terms of the maximum settlement value, the pile-top deformation, the maximum pile deformation and the shear stress.Moreover, the results show that with the increase of slope height, the maximum shear stress around the foundation wall is normally distributed at the bottom of the pit, which needs to be paid attention in practical engineering.

参考文献/References:

[1] 高波, 李方明, 朱利明, 等.地铁车站深基坑邻近浅基础房屋保护措施研究[J]. 现代隧道技术, 2018, 55(6): 117-123.
GAO Bo, LI Fangming, ZHU Liming, et al.Study on the protective measures for the shallow foundation houses adjacent to deep foundation pit of a metro station[J]. Modern Tunnelling Technology, 2018, 55(6): 117-123.
[2]张向阳, 李欢秋, 吴祥云, 等.不良地质环境中基坑边坡加固技术分析及其应用[J]. 岩土力学, 2007, 28(S1): 666-667.
ZHANG Xiangyang, LI Huanqiu, WU Xiangyun, et al.Analysis and application of reinforcement technology of deep excavation and slope under bad geological conditions[J]. Rock and Soil Mechanics, 2007, 28(S1): 666-667.
[3]吴永博, 高谦, 朱瑞钧.深基坑搅拌支护桩周边建筑物沉降研究[J]. 西安建筑科技大学学报(自然科学版), 2006,38(5): 609-613.
WU Yongbo, GAO Qian, ZHU Ruijun.Research of the building settlement surrounding the deep foundation pit of mix-refaining pile[J]. J. of Xi’an Univ. of Arch. & Tech.(Natural Science Edition), 2006,38(5): 609-613.
[4]WANG Wei, GRIFFITHS D.V.Case study of slope failure during construction of an open pit mine in Indonesia[J]. Canadian Geotechnical Journal, 2019, 56(5): 636-648.
[5]XU C.J., XU Y.L., SUN H.L., et al.Characteristics of braced excavation under asymmetrical loads [J]. Mathematical Problems in Engineering, 2013(1): 1-12.
[6]侯新宇, 刘松玉, 童立元.地铁换乘站坑中坑开挖变形特性[J]. 东南大学学报(自然科学版), 2011, 41(6): 1289-1294.
HOU Xinyu, LIU Songyu, TONG Liyuan.Deformation characteristics in pit-in-pit of metro interchange station[J]. Journal of Southeast University(Natural Science Edition), 2011, 41(6): 1289-1294.
[7]李秀英.不良地质条件下边坡高层建筑深基坑施工变形控制[J]. 科技通报, 2018, 34(7): 227-231.
LI Xiuying.Deformation control of deep foundation pit of slope under the bad geological conditions[J]. Bulletin of Science and Technology, 2018, 34(7): 227-231.
[8]李邵军, 陈静, 练操.边坡桩-土相互作用的土拱力学模型与桩间距问题[J]. 岩土力学, 2010, 31(5): 1352-1358.
LI Shaojun, CHEN Jing, LIAN Cao.Mechanical model of soil arch for interaction of piles and slope and problem of pile spacing[J]. Rock and Soil Mechanics, 2010, 31(5): 1352-1358.
[9]LIN Mengjie.Discussions on foundation pit construction scheme of large building in mountain area[J]. Applied Mechanics and Materials.2014, 580: 2289-2293.
[10]石钰锋, 阳军生, 白伟, 等.紧邻铁路偏压基坑围护结构变形与内力测试分析[J]. 岩石力学与工程学报, 2011, 30(4): 826-833.
SHI Yufeng, YANG Junsheng, BAI Wei, et al. Analysis of field testing for deformation and internal force of unsymmetrical loaded foundation pit’s enclosure structure close to railway[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(4): 826-833.
[11]LIU Jie, HENG Hengcao, XIAO Fengjiang.Deformation monitoring and numerical analysis at the top of slope of a foundation pit[J]. Applied Mechanics and Materials.2013, 353: 640-43.
[12]雷崇.临河地铁深基坑开挖在大偏压作用下的支护结构性状研究[J].铁道标准设计, 2017, 61(5): 130-134.
LEI Chong.Research on characteristics of retaining structures for riverine subway deep excavation under excessive eccentric compression[J]. Railway Standard Design.2017, 61(5): 130-134.
[13]刘波, 席培胜, 章定文.偏压作用下非等深基坑开挖效应数值分析[J]. 东南大学学报(自然科学版), 2016, 46(4): 853-859.
LIU Bo, XI Peisheng, ZHANG Dingwen.Numerical analysis of excavation effect of unsymmetrical loaded foundation pit with different excavation depths[J]. Journal of Southeast University(Natural Science Edition), 2016, 46(4): 853-859.
[14]王金安, 黄琨, 张然.高陡复杂露天矿边坡地应力场分区非线性反演分析[J].岩土力学, 2013, 34(S2): 214-221.
WANG Jinan, HUANG Kun, ZHANG Ran.Sub-regional nonlinear in-situ stress inversion analysis of complex high steep slope of open pit[J]. Rock and Soil Mechanics, 2013, 34(S2): 214-221.
[15]YANG Guanghua, ZHONG Zhihui, ZHANG Yucheng, et al.Optimal design of anchor cables for slope reinforcement based on stress and displacement fields[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2015, 7(4): 411-420.
[16]刘继强, 田志强, 林志斌, 等.高边坡对邻近基坑稳定性的影响研究[J]. 隧道建设, 2011, 31(3): 294-300.
LIU Jiqiang, TIAN Zhiqiang, LIN Zhibin, et al. Numerical analysis on stability of foundation pit at foot of high slope[J]. Tunnel Construction, 2011, 31(3): 294-300.
[17]HSIEHPiogo, OU Changyu.Shape of ground surface settlement profiles caused by excavation[J]. Canadian Geotechnical Journal, 1998, 35(6): 1004-1017.
[18]光辉, 孙建超, 唐超.高层建筑深基坑开挖阶段围护桩变形特性分析[J]. 建筑技术, 2017, 48(9): 964-967.
GUANG Hui, SUN Jianchao, TANG Chao.Analysis on deformation characteristics of retaining piles in deep foundation pit excavation stage of high-rise building[J]. architecture technology, 2017, 48(9): 964-967.
[19]聂如松, 冷伍明, 杨奇, 等.桩-土间剪切应力的传递探讨[J]. 岩土力学, 2009, 30(3): 799-804.
NIE Rusong, LENG Wuming, YANG Qi, et al. Discussion on shear stress transfer between pile and soil[J]. Rock and Soil Mechanics, 2009, 30(3): 799-804.

相似文献/References:

[1]刘毅,张勇,袁青,等.邻近边坡地铁车站基坑顺逆结合施工稳定性分析[J].西安建筑科技大学学报(自然科学版),2019,51(06):873.[doi:10.15986/j.1006-7930.2019.06.015]
　LIU Yi,ZHANG Yong,YUAN Qing,et al.Analysis on the stability of bias metro station pit excavated through the combination method of bottom-up and top-down technology[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(03):873.[doi:10.15986/j.1006-7930.2019.06.015]

备注/Memo

备注/Memo:
收稿日期:2019-09-07 修改稿日期:2020-05-08
基金项目:国家自然科学基金项目(51174197)
第一作者:李浩(1974-),男,本科,高级工程师.主要从事市政、路桥、城市轨道交通等领域的工程管理.E-mail:544355951@qq.com
更新日期/Last Update: 2020-07-30