Influence of the interface roughness on the progressive failure characteristics of tunnel-type anchorage in soft rock
HAN Yafeng1，2，LIU Xinrong2，3，LIANG Ninghui2，3，LIU Mingwei1，ABI Erdi1，DENG Zhiyun2，4，LAI Guosen5
(1. School of River and Ocean Engineering，Chongqing Jiaotong University，Chongqing 400074，China；
2. School of Civil Engineering，Chongqing University，Chongqing 400041，China；3. National Joint
Engineering Research Center for Prevention and Control of Environmental Geological Hazards in the TGR Area，
Chongqing 400045，China；4. Department of Hydraulic Engineering，Tsinghua University，Beijing 100084，China；
5. China Railway Beijing Engineering Bureau Group Second Engineering Co.，Ltd.，Changsha，Hunan 410000，China)
Abstract：To investigate the influence of the roughness of the interface on the progressive failure characteristics of tunnel-type anchorage(TTA) in soft rock，three similar models of TTAs with different interface roughnesses were made，and the digital image correlation technology was employed simultaneously to systematically compare and analyse the propagation and spatial distribution characteristics of cracks during progressive failure of TTAs. The results indicate that the ultimate bearing capacity of the TTA decreases gradually with the decrease of the roughness of the interface. Furthermore，the initiation angle of the crack in the surrounding rock increases gradually with the decrease of the roughness of the interface. Simultaneously，the initiation location of the main crack in the surrounding rock of the upper part of the plug body also gradually moves to the middle and front end of the crown of the plug body. The surrounding rock in the upper part of the plug body changed from the overall failure to the local failure. The failure range of surrounding rock is concentrated in the middle and front part of the crown. The cracks near the floor of the plug body gradually change from shear cracks into sporadic large-angle short cracks. The shear cracks are approximately parallel to the axis of the plug body and penetrate to the ground surface. The failure mode of the lower part of the plug body changed from a thin shear zone to slip along the interface. With the decrease of interface roughness，the failure sequence of the TTA changes from “compressive-shear(or tensile-shear) failure of rock mass at the back end of the crown→slip and debonding of interface→tensile-shear and tensile failure of rock mass at the middle front end of the crown” to “slip and debonding of interface→tensile-shear failure of rock mass at the front end of the crown→tensile failure of rock mass at the back end of the crown”. The research results can provide a basis for revealing the working characteristics and failure mechanism of TTAs and improving the design calculation theory.
韩亚峰1，2，刘新荣2，3，梁宁慧2，3，刘明维1，阿比尔的1，邓志云2，4，赖国森5. 接触面粗糙度对软岩隧道锚渐进破坏特征的影响研究[J]. 岩石力学与工程学报, 2023, 42(7): 1650-1661.
HAN Yafeng1，2，LIU Xinrong2，3，LIANG Ninghui2，3，LIU Mingwei1，ABI Erdi1，DENG Zhiyun2，4，LAI Guosen5. Influence of the interface roughness on the progressive failure characteristics of tunnel-type anchorage in soft rock. , 2023, 42(7): 1650-1661.
[1] 汪海滨. 悬索桥隧道式复合锚碇系统作用机制研究[博士学位论文][D]. 成都：西南交通大学，2006.(WANG Haibin. Mechanism research on compound tunnel anchorage of suspension bridge[Ph. D. Thesis][D]. Chengdu：Southwest Jiaotong University，2006.(in Chinese))
[2] 汪海滨，高 波，孙 振. 悬索桥隧道式锚碇系统力学行为研究[J]. 岩石力学与工程学报，2005，24(15)：2 728–2 735.(WANG Haibin，GAO Bo，SUN Zhen. Study on mechanical behaviour of tunnel anchorage system for suspension bridge[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(15)：2 728–2 735.(in Chinese))
[3] 江 南，黄 林，冯 君，等. 铁路悬索桥隧道式锚碇设计计算方法研究[J]. 岩土力学，2020，41(3)：999–1 009.(JIANG Nan，HUANG Lin，FENG Jun，et al. Research on calculation method of tunnel-type anchorage design for railway suspension bridge[J]. Rock and Soil Mechanics，2020，41(3)：999–1 009.(in Chinese))
[4] 江 南. 铁路悬索桥隧道式锚碇承载机制及计算方法研究[博士学位论文][D]. 成都：西南交通大学，2013.(JIANG Nan. The carrying mechanism and calculation method of the tunnel anchorage of railway suspension bridges[Ph. D. Thesis][D]. Chengdu：Southwest Jiaotong University，2013.(in Chinese))
[5] 王东英，汤 华，尹小涛，等. 基于应变软化的隧道锚渐进破坏过程探究[J]. 岩石力学与工程学报，2019，38(增2)：3 448–3 459. (WANG Dongying，TANG Hua，YIN Xiaotao，et al. Preliminary study on the progressive failure of tunnel-type anchorage based on strain-softening theory[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.2)：3 448–3 459.(in Chinese))
[6] 刘新荣，韩亚峰，周小涵，等. 软岩隧道锚渐进破坏演化特征的模型试验研究[J]. 岩石力学与工程学报，2022，41(9)：1 760–1 770. (LIU Xinrong，HAN Yafeng，ZHOU Xiaohan，et al. Model test on the progressive failure characteristics of tunnel-type anchorage in soft rock[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(9)：1 760–1 770.(in Chinese))
[7] 夏才初，程鸿鑫，李荣强. 广东虎门大桥东锚碇现场结构模型试验研究[J]. 岩石力学与工程学报，1997，16(6)：571–576.(XIA Caichu，CHENG Hongxin，LI Rongqiang. Testings study on field structure model of the east anchorage of Guangdong Humen Bridge[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(6)：571–576.(in Chinese))
[8] 张奇华，余美万，喻正富，等. 普立特大桥隧道锚现场模型试验研究——抗拔能力试验[J]. 岩石力学与工程学报，2015，34(1)：93–103.(ZHANG Qihua，YU Meiwan，YU Zhengfu，et al. Field model tests on pullout capacity of tunnel-type anchorages of Puli Bridge[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(1)：93–103.(in Chinese))
[9] 邬爱清，彭元诚，黄正加，等. 超大跨度悬索桥隧道锚承载特性的岩石力学综合研究[J]. 岩石力学与工程学报，2010，29(3)：433–441.(WU Aiqing，PENG Yuancheng，HUANG Zhengjia，et al. Rock mechanics comprehensive study of bearing capacity characteristics of tunnel anchorage for super-large span suspension bridge[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(3)：433–441.(in Chinese))
[10] 余美万，张奇华，高利萍，等. 金东大桥隧道锚现场模型试验及承载能力分析[J]. 岩土工程学报，2021，43(2)：338–346.(YU Meiwan，ZHANG Qihua，GAO Liping，et al. Field model tests and bearing capacity analysis of tunnel anchorage of Jindong Bridge[J]. Chinese Journal of Geotechnical Engineering，2021，43(2)：338–346.(in Chinese))
[11] 蒋昱州，王瑞红，朱杰兵，等. 伍家岗大桥隧道锚三维地质力学模型试验研究[J]. 岩石力学与工程学报，2016，35(增2)：4 103–4 113. (JIANG Yuzhou，WANG Ruihong，ZHU Jiebing，et al. Geomechanical model test on global stability for Wujiagang bridge tunnel-type anchorages[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.2)：4 103–4 113.(in Chinese))
[12] 余美万，张奇华，喻正富，等. 基于夹持效应的普立特大桥隧道锚现场模型试验研究[J]. 岩石力学与工程学报，2015，34(2)：261–270.(YU Meiwan，ZHANG Qihua，YU Zhengfu，et al. Field model experiment on clamping effect of tunnel-type anchorage at Puli Bridge[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(2)：261–270.(in Chinese))
[13] 文 海，廖明进，张富贵. 悬索桥隧道锚承载力的室内模型试验研究[J]. 铁道科学与工程学报，2017，14(8)：1 735–1 742.(WEN Hai，LIAO Mingjin，ZHANG Fugui. Laboratory model test study on bearing capacity of tunnel anchorage of suspension bridge[J]. Journal of Railway Science and Engineering，2017，14(8)：1 735–1 742.(in Chinese))
[14] 王东英，尹小涛，杨光华. 悬索桥隧道式锚碇夹持效应的试验研究[J]. 岩土力学，2021，42(4)：1 003–1 011.(WANG Dongying，YIN Xiaotao，YANG Guanghua. Experimental study on the clamping effect of suspension bridge tunnel-type anchorage[J]. Rock and Soil Mechanics，2021，42(4)：1 003–1 011.(in Chinese))
[15] 刘新荣，李栋梁，吴相超，等. 泥岩隧道锚承载特性现场模型试验研究[J]. 岩土工程学报，2017，39(1)：161–169.(LIU Xinrong，LI Dongliang，WU Xiangchao，et al. Filed model tests on bearing behavior of mudstone tunnel anchorage[J]. Chinese Journal of Geotechnical Engineering，2017，39(1)：161–169.(in Chinese))
[16] 胡 波，曾钱帮，饶 旦，等. 锚碇–围岩系统在拉剪复合应力条件下的变形规律及破坏机制研究——以坝陵河特大岩锚悬索桥为例[J]. 岩石力学与工程学报，2007，26(4)：712–719.(HU Bo，ZENG Qianbang，RAO Dan，et al. Study on deformation law and failure mechanism of anchorage-surrounding rock system under tensile-shear complex stresses — taking super-large suspension bridge on Baling River for example[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(4)：712–719.(in Chinese))
[17] 李栋梁，刘新荣，周火明，等. 下卧软弱夹层的软岩隧道式锚碇承载特性研究[J]. 岩石力学与工程学报，2017，36(10)：2 457–2 465. (LI Dongliang，LIU Xinrong，ZHOU Huoming，et al. Bearing behavior of tunnel anchorage in soft rock with an underlying weak interlayer[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(10)：2 457–2 465.(in Chinese))
[18] 张 锐. 水作用下软岩隧道锚承载力试验研究[硕士学位论文][D]. 重庆：重庆大学，2016.(ZHANG Rui. The bearing capacity test of the tunnel-type anchorage in soft rock under water effect[M. S. Thesis][D]. Chongqing：Chongqing University，2016.(in Chinese))
[19] 李栋梁. 复杂地层浅埋软岩隧道式锚碇受荷响应机制及设计计算方法研究[博士学位论文][D]. 重庆：重庆大学，2017.(LI Dongliang. Research on the load response mechanism and design calculation method of the shallow buried tunnel anchorage with soft surrounding rock in complex stratum[Ph. D. Thesis][D]. Chongqing：Chongqing University，2017.(in Chinese))
[20] CHEN K L，WU H N，CHENG W C，et al. Geological characteristics of strata in Chongqing，China，and mitigation of the environmental impacts of tunneling-induced geo-hazards[J]. Environmental Earth Sciences，2017，76：1–16.
[21] 顾大钊. 相似材料和相似模型[M]. 徐州：中国矿业大学出版社，1995：22–23.(GU Dazhao. Equivalent materials and similitude models[M]. Xuzhou：China University of Mining and Technology Press，1995：22–23.(in Chinese))
[22] 中华人民共和国国家标准编写组. GB 50010—2010 混凝土结构设计规范[S]. 北京：建筑工业出版社，2010.(The National Standards Compilation Group of People?s Republic of China. GB 50010—2010 Code for design of concrete structures[S]. Beijing：China Architecture and Building Press，2010.(in Chinese))
[23] 杨 旭，苏定立，周 斌，等. 红层软岩模型试验相似材料的配比试验研究[J]. 岩土力学，2016，37(8)：2 231–2 237.(YANG Xu，SU Dingli，ZHOU Bin，et al. Experiment study on similarity ratio of similar material for model test on red-bed soft rock[J]. Rock and Soil Mechanics，2016，37(8)：2 231–2 237.(in Chinese))
[24] TOVAR-VALENCIA R D，GALVIS-CASTOR A，SALGADO R，et al. Effect of surface roughness on the shaft resistance of displacement model piles in sand[J]. Journal of Geotechnical and Geoenvironmental Engineering，2018，144(3)：04017120.
[25] GALVIS-CASTRO A C，TOVAR-VALENCIA R D，SALGADO R，et al. Effect of loading direction on the shaft resistance of jacked piles in dense sand[J]. Geotechnique，2019，69(1)：16–28.
[26] 中华人民共和国国家标准编写组. GB/T 1031—2009 产品几何技术规范(GPS)表面结构 轮廓法 表面粗糙度参数及其数值[S]. 北京：中国标准出版社，2009.(The National Standards Compilation Group of People?s Republic of China. GB/T 1031—2009 Geometrical product specification(GPS)-surface texture：profile method-surface roughness parameters and their values[S]. Beijing：Standards Press of China，2009.(in Chinese))
[27] 中华人民共和国国家标准编写组. GB 50007—2011 建筑地基基础设计规范[S]. 北京：建筑工业出版社，2011.(The National Standards Compilation Group of People?s Republic of China. GB 50007—2011 Code for design of building foundation[S]. Beijing：China Architecture and Building Press，2011.(in Chinese))
[28] LIU B L，YANG H Q，HAQUE E，et al. Effect of joint orientation on the breakage behavior of jointed rock mass loaded by disc cutters[J]. Rock Mechanics and Rock Engineering，2021，54：2 087–2 108.
2023, Vol. 42 
