废旧轮胎加筋土在支挡结构中位移影响因素分析研究
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摘要
通过Plaxis有限元数值分析软件对废旧轮胎复合单元体挡土墙的最大水平位移、垂直位移进行了模拟计算,并对影响支挡结构最大位移的各因素进行敏感性分析。通过以上研究得出:废旧轮胎复合单元体用于挡土墙中是可行的。支挡结构最大位移计算结果表明,对于水平位移,内摩擦角、变形模量、黏聚力对支挡结构的最大水平位移影响依次减小,且随着变形模量、黏聚力、内摩擦角的增大,支挡结构的最大水平位移减小;而对于垂直位移,变形模量、黏聚力、内摩擦角对支挡结构的最大垂直位移影响则依次增大。从各因素对支挡结构发生的最大水平、垂直位移的影响可以看出,单元体的内摩擦角对支挡结构的位移影响是最大的,因此在选择建造此类挡土墙时,应在保证复合单元体有一定的弹性模量基础上,尽量选择大内摩擦角的复合体内部填充料。
Through the Plaxis finite element numerical analysis software,the maximum horizontal displacement and vertical displacement of the waste tire composite unit retaining wall are simulated.Meanwhile,the sensitivity analysis of the factors affecting the maximum displacement of the retaining structure is carried out.The results indicate that,it is feasible for waste tire compound unit to be used in retaining wall.The maximum displacement of the retaining structure shows the results for the horizontal displacement,horizontal displacement are maximum angle of internal friction,deformation modulus,the cohesive force of the retaining structure sequentially reduced,and as the modulus of deformation,cohesion,internal friction angle increases,the maximum horizontal displacement of the support retaining structure is reduced.However,for vertical displacement,the influence of internal friction angle,cohesion and deformation modulus on the maximum vertical displacement of supporting structures decreases.From the influence of each factor on the maximum horizontal and vertical displacement of the retaining structure,it can be seen that the internal friction angle of the unit is the largest of the displacement of the retaining structure,so when choosing to establish such a retaining wall,the composite element should be selected to be filled with the internal friction angle as far as possible,based on a certain modulus of elasticity.
Through the Plaxis finite element numerical analysis software,the maximum horizontal displacement and vertical displacement of the waste tire composite unit retaining wall are simulated.Meanwhile,the sensitivity analysis of the factors affecting the maximum displacement of the retaining structure is carried out.The results indicate that,it is feasible for waste tire compound unit to be used in retaining wall.The maximum displacement of the retaining structure shows the results for the horizontal displacement,horizontal displacement are maximum angle of internal friction,deformation modulus,the cohesive force of the retaining structure sequentially reduced,and as the modulus of deformation,cohesion,internal friction angle increases,the maximum horizontal displacement of the support retaining structure is reduced.However,for vertical displacement,the influence of internal friction angle,cohesion and deformation modulus on the maximum vertical displacement of supporting structures decreases.From the influence of each factor on the maximum horizontal and vertical displacement of the retaining structure,it can be seen that the internal friction angle of the unit is the largest of the displacement of the retaining structure,so when choosing to establish such a retaining wall,the composite element should be selected to be filled with the internal friction angle as far as possible,based on a certain modulus of elasticity.
引文
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[3]渠巍.废旧轮胎热裂解与催化裂解行为研究[D].四川大学,2006.
[4]朱则刚.废胎再生利用前景乐观[J].资源与人居环境,2013,15(2):64-66.
[5]张学花.轮胎业快速发展引发废旧轮胎处理方法的思考[J].河南科技,2013,13(1):49-51.
[6]吴秀兰,李贵君.国外废旧轮胎处理和再生利用的最新进展[J].轮胎工业,2000,32(2):67-72.
[7]杨广庆.加筋挡土墙合理设计方法的探讨[J].长江科学院院报,2014,25(3):11-18.
[8]王学成.废旧轮胎-土复合体力学性能的研究[D].山东大学,2017.
[9]杨超.废旧轮胎加筋路堤边坡抗震性能研究[D].湖北工业大学,2015.
[10]柯浦璋.法国用废轮胎作建材[J].建筑知识,1998,41(6):18-19.
[11]余钰.重力式挡土墙结构体系可靠度分析[D].兰州理工大学,2008.
[12]杜永峰,余钰,李慧.重力式挡土墙稳定性的结构体系可靠度分析[J].岩土工程学报,2008,30(3):349-353.
[13]Taya Ann Retterer.Gravity and Mechanically Stabilized Earth Wall Using Whole Scarp Tires[D].Texas Tech University,2000.
[14]马源.废旧轮胎-土复合体力学性能及工程应用研究[D].山东大学,2018.