拉力分散型锚索在边坡二次加固中的应用
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摘要
一些边坡治理后由于工程加载、雨水入渗以及地震等影响,局部会出现新的变形破坏,需要根据边坡和治理工程结构的变形情况进行二次加固(补强加固)。以拉力分散型锚索为例,首先分析其结构特征及优越性。考虑松散地层的软化特性,借助剪滞理论分析模型给出拉力分散型锚索锚固段上灌浆体与锚固岩层界面剪应力的计算公式,在此基础上,对一公路边坡二次加固中采用的拉力分散锚索锚固段荷载分布进行了分析和讨论。实例分析和监测结果表明,拉力分散型锚索锚固段荷载分布更为合理,有助于维护锚固体系的预应力水平。拉力分散型锚索用于边坡二次加固具有广泛的应用前景。
Affected by loads,water infiltration,earthquake and others factors,local failures will occur in some protected slopes.Secondary reinforcement thus needs to implement for these slopes according to the slope deformation and protective measures.In this paper,the dispersion-type tensile cable cited as the secondary reinforced measure.The structure and superiority of this pre-stressed cable are firstly addressed.Considering the stratum softening,calculated formula modified from Shear-Lag Model is presented to analyze the shear strength of grout/matrix interface along the anchored section.Load transfer of the dispersion-type tensile cable of the secondary reinforcement in a highway slope is then analyzed and discussed.The case analysis and monitoring results show that load distribution of the dispersion-type tensile cable is more reasonable,which contributes to maintaining the pre-stress capability of the anchorage system.It is expected that the dispersion-type tensile cable for slope second reinforcement has wide application prospects.
Affected by loads,water infiltration,earthquake and others factors,local failures will occur in some protected slopes.Secondary reinforcement thus needs to implement for these slopes according to the slope deformation and protective measures.In this paper,the dispersion-type tensile cable cited as the secondary reinforced measure.The structure and superiority of this pre-stressed cable are firstly addressed.Considering the stratum softening,calculated formula modified from Shear-Lag Model is presented to analyze the shear strength of grout/matrix interface along the anchored section.Load transfer of the dispersion-type tensile cable of the secondary reinforcement in a highway slope is then analyzed and discussed.The case analysis and monitoring results show that load distribution of the dispersion-type tensile cable is more reasonable,which contributes to maintaining the pre-stress capability of the anchorage system.It is expected that the dispersion-type tensile cable for slope second reinforcement has wide application prospects.
引文
[1]Wang Huaqing,Liao Zhenghuan.The prestressed anchor ropes forretrofitting damaged highway structures[J].China Journal of High-way and Transport,1991,4(3):24-31[王化卿,廖正环.用预应力锚索整治公路人工构造物病害[J].中国公路学报,1991,4(3):24-31]
[2]Shen Na,Xie Fei.Analysis on the reasons caused the collapse ofanti-slide piles in the west approach road of Zhegushan tunnel andtreatment scheme[J].Shanxi Architecture,2008,34(6):310-312[沈娜,颉飞.鹧鸪山隧道西引道抗滑桩倒塌成因分析与治理[J].山西建筑,2008,34(6):310-312]
[3]Ji Suiwang,Tang Yongjian,Hu Degui,et al.Analysis of typicalseismic damages of highways in Wenchuan Earthquake-induced haz-ard areas in Sichuan Province[J].Chinese Journal of Rock Me-chanics and Engineering,2009,28(6):1250-1260[吉随旺,唐永建,胡德贵,等.四川省汶川地震灾区干线公路典型震害特征分析[J].岩石力学与工程学报,2009,28(6):1250-1260]
[4]Zhang Sifeng,Song Xiuguang,Zhou Jian,et al.Study on durabilityand secondary reinforcement technique of prestressed anchoragestructures[J].Journal of Highway and Transportation Research andDevelopment,2008,25(2):30-33,39[张思峰,宋修广,周健,等.预应力锚固结构耐久性及其二次加固技术研究[J].公路交通科技,2008,25(2):30-33,39]
[5]Jiang Zhongxin.A gauss curve model on shear stress along anchoringsection of anchoring rope of extensional force type[J].ChineseJournal of Geomechanical Engineering,2001,23(6):696-699[蒋忠信.拉力型锚索锚固段剪应力分布的高斯曲线模式[J].岩土工程学报,2001,23(6):696-699]
[6]Mondher Zidi,Luc Carpentier,Antoine Chateauminois,et al.Quan-titative analysis of the micro-indentation behaviour of pre-reinforcedcomposites:development and validation of an analytical model[J].Composites Science and Technology,2000(6):429-437
[7]Yue Cai,Tetsuro Esaki,Yujing Jiang.A rock bolt and rock massinteraction model[J].International Journal of Rock Mechanics&Mining Sciences,2004(41):1055-1067
[8]He Siming,Zhang Xiaogang,Wang Chenghua.Study on mechanismof prestressed anchoring cable based on modified shear lag model[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(15):2562-2567[何思明,张小刚,王成华.基于修正剪切滞模型的预应力锚索作用机理研究[J].岩石力学与工程学报,2004,23(15):2562-2567]
[9]Jia Purong,Jiao Guiqiong,Liu Da.Mechanical behavior of interfaceon fiber-reinforced toughness matrix[J].Acta Mechanica SolidaSinica,2001,22(4):351-355[贾普荣,矫桂琼,刘达.纤维增强韧性基体界面力学行为[J].固体力学学报,2001,22(4):351-355]
[10]Jiang Zhongxin.Mechanism and practice on reinforcing loose bedlandslide with prestressed anchoring rope[J].Journal of RailwayEngineering Society,1999,61(1):72-77[蒋忠信.预应力锚索加固松散体滑坡的机理与实践[J].铁道工程学报,1999,61(1):72-77]
[2]Shen Na,Xie Fei.Analysis on the reasons caused the collapse ofanti-slide piles in the west approach road of Zhegushan tunnel andtreatment scheme[J].Shanxi Architecture,2008,34(6):310-312[沈娜,颉飞.鹧鸪山隧道西引道抗滑桩倒塌成因分析与治理[J].山西建筑,2008,34(6):310-312]
[3]Ji Suiwang,Tang Yongjian,Hu Degui,et al.Analysis of typicalseismic damages of highways in Wenchuan Earthquake-induced haz-ard areas in Sichuan Province[J].Chinese Journal of Rock Me-chanics and Engineering,2009,28(6):1250-1260[吉随旺,唐永建,胡德贵,等.四川省汶川地震灾区干线公路典型震害特征分析[J].岩石力学与工程学报,2009,28(6):1250-1260]
[4]Zhang Sifeng,Song Xiuguang,Zhou Jian,et al.Study on durabilityand secondary reinforcement technique of prestressed anchoragestructures[J].Journal of Highway and Transportation Research andDevelopment,2008,25(2):30-33,39[张思峰,宋修广,周健,等.预应力锚固结构耐久性及其二次加固技术研究[J].公路交通科技,2008,25(2):30-33,39]
[5]Jiang Zhongxin.A gauss curve model on shear stress along anchoringsection of anchoring rope of extensional force type[J].ChineseJournal of Geomechanical Engineering,2001,23(6):696-699[蒋忠信.拉力型锚索锚固段剪应力分布的高斯曲线模式[J].岩土工程学报,2001,23(6):696-699]
[6]Mondher Zidi,Luc Carpentier,Antoine Chateauminois,et al.Quan-titative analysis of the micro-indentation behaviour of pre-reinforcedcomposites:development and validation of an analytical model[J].Composites Science and Technology,2000(6):429-437
[7]Yue Cai,Tetsuro Esaki,Yujing Jiang.A rock bolt and rock massinteraction model[J].International Journal of Rock Mechanics&Mining Sciences,2004(41):1055-1067
[8]He Siming,Zhang Xiaogang,Wang Chenghua.Study on mechanismof prestressed anchoring cable based on modified shear lag model[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(15):2562-2567[何思明,张小刚,王成华.基于修正剪切滞模型的预应力锚索作用机理研究[J].岩石力学与工程学报,2004,23(15):2562-2567]
[9]Jia Purong,Jiao Guiqiong,Liu Da.Mechanical behavior of interfaceon fiber-reinforced toughness matrix[J].Acta Mechanica SolidaSinica,2001,22(4):351-355[贾普荣,矫桂琼,刘达.纤维增强韧性基体界面力学行为[J].固体力学学报,2001,22(4):351-355]
[10]Jiang Zhongxin.Mechanism and practice on reinforcing loose bedlandslide with prestressed anchoring rope[J].Journal of RailwayEngineering Society,1999,61(1):72-77[蒋忠信.预应力锚索加固松散体滑坡的机理与实践[J].铁道工程学报,1999,61(1):72-77]
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