拉拔作用下锚杆复合土钉支护协同作用细观机制研究

doi:10.13722/j.cnki.jrme.2018.1069

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (1548 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Composite soil nail-anchor supporting walls have been widely used in practice because of their flexibility，strong supporting capacity，short construction period and low cost. However，researches of composite soil nail-anchor supporting walls leg engineering practices and the working mechanisms are not fully understood， which may lead to some uncertainties in design. Combining three-dimensional(3D) discrete element method (DEM) and experimental model test，displacement field，motion trace，porosity and shear stress of sand particles as well as anchorage resistance during the process of pulling anchor were investigated at the mesoscopic level. The results reveal that the larger the diameter of the anchorage plate，the larger the vertical influence range，and that the displacement field has a convergent bell-mouth shape. During the process of anchor-pulling，sand particles between anchors and soil nails tending to rotate or slide can be divided into three zones with different particle movements for each zone. When the anchor spacing is twice the diameter of the anchorage plate，the composite soil nailing method can achieve an optimum result. Meanwhile，dilatation and contraction occur in sand. The change of the porosity can be described by sinusoidal wave curve and the minimum porosity appears around the nails. Sand particles are squeezed together and blocked by the soil nails，which enhances the synergistic effect of composite soil nail-anchor supporting system. The results presented in this study may provide useful references for upgrading current design methodology of composite soil nail-prestressed anchor supporting system.

Key words： soil mechanics composite soil nail-anchor wall synergistic mechanism physical model test mesoscopic analysis

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	SONG Xianghua1
	TAN Yong1
	LIU Junyan2
	3
	LIU Yan2
	3
	MA Guining4

Cite this article:

SONG Xianghua1,TAN Yong1,LIU Junyan2, et al. Mesoscopic mechanisms of collaborative working of composite soil nail-anchor supporting wall subjected to tension[J]. , 2019, 38(3): 591-605.

URL:

http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.1069 OR http://www.rockmech.org/EN/Y2019/V38/I3/591

[8]	程良奎. 岩土锚固的现状与发展[J]. 土木工程学报，2001，34(3)：7-12.(CHENG Liangkui. Present status and development ofground anchorages[J]. China Civil Engineering Journal，2001，34(3)：7-12. (in Chinese))
[11]	尤志嘉，付厚利，尤春安，等. 土层锚固体应力传递机制[J]. 岩土力学，2018，39(1)：85-92.(YOU Zhijia，FU Houli，YOU Chun?an，et al. Stress transfer mechanism of soil anchor body[J]. Rock and Soil Mechanics，2018，39(1)：85-92.(in Chinese))
[13]	龚晓南. 土钉和复合土钉支护若干问题[J]. 土木工程学报，2003，36(10)：80-83.(GONG Xiaonan. Some problems on soil nailing and composite soil nailing[J]. China Civil Engineering Journal，2003，36(10)：80-83.(in Chinese))
[2]	杨育文. 复合土钉墙实例分析和变形评估[J]. 岩土工程学报， 2012，34(4)：735-741.(YANG Yuwen. Case studies of composite soil-nailing walls and movement estimate[J]. Chinese Journal of Geotechnical Engineering，2012，34(4)：735-741.(in Chinese))
[1]	中华人民共和国国家标准编写组. GB 50739—2011复合土钉墙基坑支护技术规范[S]. 北京：中国计划出版社 2012.(The National Standards Compilation Group of People?s Republic of China. GB 50739—2011 Technical code for composite soil nailing wall in retaining and protection of excavation[S]. Beijing：China Planning Press，2012.(in Chinese))
[4]	陈长流，叶帅华，朱彦鹏. 预应力锚杆与土钉联合支护体系在兰州深基坑工程中的应用与监测分析[J]. 岩土工程学报，2012，34(增1)：484-489.(CHEN Changliu，YE Shuaihua，ZHU Yanpeng. Application and monitoring analysis of combined supporting system by prestressed anchors and soil nails for a deep excavation in Lanzhou[J]. Chinese Journal of Geotechnical Engineering，2012，34(Supp.1)：484-489. (in Chinese))
[17]	宋二祥，邱玥. 复合土钉支护变形特性的有限元分析[J]. 建筑施工，2001，23(2)：370-374.(SONG Erxiang，QIU Yue. The finite element analysis of composite soil nailing characteristic deformation[J]. Building Construction，2001，23(2)：370-374.(in Chinese))
[3]	杨志银，张俊. 复合土钉墙技术在深圳的应用和发展[J]. 岩土工程学报，2006，28(增1)：1 673-1 676.(YANG Zhiyin，ZHANG Jun. Development and application of composite soil nailing walls in Shenzhen[J]. Chinese Journal of Geotechnical Engineering，2006，28(Supp.1)：1 673-1 676.(in Chinese))
[5]	宋二祥，陈肇元. 土钉支护及其有限元分析[J]. 工程勘察，1996，(2)：1-5.(SONG Erxiang，CHEN Zhaoyuan. Soil nailing and FEM analysis[J]. Geotechnical Investigation and Surveying，1996，(2)：1-5.(in Chinese))
[10]	周勇，朱彦鹏. 黄土地区框架预应力锚杆支护结构设计参数的灵敏度分析[J]. 岩石力学与工程学报，2006，25(增1)：3 115-3 122. (ZHOU Yong，ZHU Yanpeng. Sensitivity analysis of design parameters of grillage supporting structure with prestressed anchor in loess region[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.1)：3 115-3 122.(in Chinese))
[12]	TAN Y，CHOW C. Slope stabilization using soil nails:design assumptions and construction realities[C]// Proceedings of Malaysia- Japan Symposium on Geohazards and Geoenvironmental Engineering. Bangi：Malaysia，2004.
[15]	肖毅，邹勇，俞季民. 钉锚结合支护的模型试验研究[J]. 武汉水利电力大学学报，1999，32(1)：74-78.(XIAO Yi，ZOU Yong，YU Jimin. Research of nail-anchored bracing by laboratory tests[J]. Journal of Wuhan University of Hydraulic and Electric Engineering，1999，32(1)：74-78.(in Chinese))
[18]	董诚，郑颖人，陈新颖，等. 深基坑土钉和预应力锚杆复合支护方式的探讨[J]. 岩土力学，2009，30(12)：3 793-3 796.(DONG Cheng，ZHENG Yingren，CHEN Xinying，et al. Research on composite support pattern of soil nails and prestressed anchors in deep foundation pits[J]. Rock and Soil Mechanics，2009，30(12)：3 793-3 796.(in Chinese))
[20]	杨校辉，朱彦鹏，郭楠，等. 西宁地区几个基坑工程问题分析与处理[J]. 岩土工程学报，2014，36(增1)：208-213.(YANG Xiaohui，ZHU Yanpeng，GUO Nan，et al. Analysis and treatment for several engineering problems of foundation pits in Xining area[J]. Chinese Journal of Geotechnical Engineering，2014，36(Supp.1)：208-213.(in Chinese))
[22]	周健，郭建军，崔积弘，等. 土钉拉拔接触面的细观模型试验研究与数值模拟[J]. 岩石力学与工程学报，2009，28(9)：1 936-1 944. (ZHOU Jian，GUO Jianjun，CUI Jihong，et al. Meso-testing and numerical simulation of nail-soil contacts during pull-out[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(9)：1 936- 1 944.(in Chinese))
[23]	王家全，周健，吴辉琴，等. 加筋土拉拔界面作用的离散元细观模拟[J]. 哈尔滨工程大学学报，2014，35(7)：839-845.(WANG Jiaquan，ZHOU Jian，WU Huiqin，et al. Discrete element mesosopic simulation of the reinforced soil pullout test interface effect[J]. Journal of Harbin Engineering University，2014，35(7)：839-845.(in Chinese))
[6]	张明聚，宋二祥，陈肇元. 基坑土钉支护稳定分析方法及其应用[J].工程力学，1998，15(3)：36-43.(ZHANG Mingju，SONG Erxiang，CHEN Zhaoyuan. Astability analysis method and its application for soilnailing excavation[J]. Engineering Mechanics，1998，15(3)：36-43.(in Chinese))
[7]	屠毓敏，郑坚，陈彪. 土钉墙基坑支护机制研究[J]. 浙江水利水电专科学校学报，2001，(3)：33-35.(TU Yumin，ZHENG Jian，CHEN Biao. Study on excavation protecting mechanism of soil nailing retaining wall[J]. Journal of Zhejiang Water Conservancy and Hydropower College，2001，(3)：33-35.(in Chinese))
[9]	范秋雁，陈波，沈冰. 考虑施工过程的基坑锚杆支护模型试验研究[J]. 岩土力学，2005，26(12)：1 874-1 878.(FAN Qiuyan，CHEN Bo，SHEN Bing. Model test research of bolt supporting of foundation pit considering construction process[J]. Rock and Soil Mechanics，2005，26(12)：1 874-1 878.(in Chinese))
[14]	汤连生，宋明健，廖化荣，等. 预应力锚索复合土钉支护内力及变形分析[J]. 岩石力学与工程学报，2008，27(2)：410-417.(TANG Liansheng，SONG Mingjian，LIAO Huarong，et al. Analysis of stress and deformation of prestressed anchor cable composite soil nailing[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(2)：410-417.(in Chinese))
[19]	张化峰，张珊，王广超，等. 山东某工程深基坑事故分析及坍塌区加固设计[J]. 安徽建筑，2017，24(5)：65-67.(ZHANG Huafeng，ZHANG Shan，WANG Guangchao，et al. Accident analysis of deep foundation pit and reinforcement design of collapse area in a project in Shandong province[J]. Anhui Architecture，2017，24(5)：65-67.(in Chinese))
[21]	TAN Y，LU Y，XU C，et al. Investigation on performance of a large circular pit-in-pit excavation in clay-gravel-cobble mixed strata[J]. Tunnelling and Underground Space Technology，2018，79(2)：356-374.
[24]	刘燕，刘俊岩，郑全明，等. 锚杆复合土钉支护协同作用的模型试验研究[J]. 岩土力学，2016，38(增1)：462-468.(LIU Yan，LIU Junyan，ZHENG Quanming，et al. Model test study of synergistic effect of anchor composite soil nailing[J]. Rock and Soil Mechanics，2016，38(Supp.1)：462-468.(in Chinese))
[27]	周健，史旦达，贾敏才，等. 砂土单调剪切力学性状的颗粒流模拟[J]. 同济大学学报：自然科学版，2007，35(10)：1 299-1 304. (ZHOU Jian，SHI Danda，JIA Mincai. Numerical simulation of mechanical response on sand under monotonic loading by particle flow code[J]. Journal of Tongji University：Natural Science，2007，35(10)：1 299-1 304.(in Chinese))
[29]	郑刚，程雪松，刁钰. 基坑垮塌的离散元模拟及冗余度分析[J].岩土力学，2014，35(2)：573-583.(ZHENG Gang，CHENG Xuesong，DIAO Yu. Discrete element simulation and redundancy analysis of excavation collapse[J]. Rock and Soil Mechanics，2014，35(2)：573-583.(in Chinese))
[31]	刘文白，田桥. 上拔荷载作用下的土体细观结构分析[J]. 岩石力学与工程学报，2007，26(增2)：4 311-4 318.(LIU Wenbai，TIAN Qiao. Analysis of soil meso-structureunder uplift load[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.2)：4 311-4 318.(in Chinese))
[16]	王义重，王其勇，刘欢，等. 土钉墙-锚杆支护技术模型试验及有限元研究[J]. 岩土力学，2011，32(增2)：222-227.(WANG Yizhong，WANG Qiyong，LIU Huan，et al. Laboratory model tests and finite element analysis of soil nails-anchors supporting technique of foundation pit excavation[J]. Rock and Soil Mechanics，2011，32(Supp.2)：222-227.(in Chinese))
[26]	史旦达，周健，刘文白，等. 砂土直剪力学性状的非圆颗粒模拟与宏细观机制研究[J]. 岩土工程学报，2010，32(10)：1 557-1 565. (SHI Danda，ZHOU Jian，LIU Wenbai，et al. Exploring macro- and micro-scale responses of sand in direct shear tests by numerical simulations using non-circular particles[J]. Chinese Journal of Geotechnical Engineering，2010，32(10)：1 557-1 565.(in Chinese))
[25]	朱伟，钟小春，加瑞. 盾构隧道垂直土压力松动效应的颗粒流模拟[J]. 岩土工程学报，2008，30(5)：750-754.(ZHU Wei，ZHONG Xiaochun，JIA Rui. Simulation on relaxation effect of vertical earth pressure for shield tunnels by particle flow code[J]. Chinese Journal of Geotechnical Engineering，2008，30(5)：750-754.(in Chinese))
[28]	沈一帆. 复合土钉墙变形特性的颗粒流模拟研究[硕士学位论文][D]. 杭州：浙江工业大学，2010.(SHEN Yifan. Study on deformation of Composite soil nailed wall by particle flow code[M. S. Thesis][D]. Hangzhou：Zhejiang University of Technology，2010.(in Chinese))
[30]	LU Y，TAN Y，LI X，et al. Methodology for simulation of irregularly shaped gravel grains and its application to DEM modeling[J]. Journal of Computing in Civil Engineering，ASCE，2017，31(5)：04017023.
[32]	HANNA A，AYADAT T，SABRY M. Pullout resistance of single vertical shallow helical and plate anchors in sand[J]. Geotechnical and Geological Engineering，2007，25(6)：559-570.
[33]	史旦达. 单调与循环加载条件下砂土力学性质细观模拟[博士学位论文][D]. 上海：同济大学，2007.(SHI Danda. Micromechanical simulations of sand behavior under monotonic and cyclic loading [Ph. D. Thesis][D]. Shanghai：Tongji University，2007.(in Chinese))