Optimization Program For Reinforcement Of New Type Of Retaining Structures In The Condition Of Low-grade Highways

Reinforced gabion retaining wall is accepted by related professional field withits own advantages, the cost neeed to be reduce to spread in use in the aspect of lowgrade highway. The optimization of retaining wall design as one of important meansof reducing cost not only can reduce cost, but olso can gain a good command ofretaining wall’s principle and performance. In fact,most of optimization of retainingwall design in engineering is based on limit balance principle, usually set the spacing,length and stiffness of the material as a fixed value，this way does not take intoaccount of characteristics of the interaction between soil and reinforced material underdifferent modes. Take into account of coordinate deformation, stress and displacementthat the interaction between soil and reinforced material generate close to engineeringfacts. So this article have analyzed lateral displacement of retaining wall and load pullof wire mesh under different kinds of reinforcement modes by the finite elementmethod, thus provide optimization program for reinforcement with guidance,this canpromote reinforced gabion retaining wall spread in use in the aspect of low gradehighway very well, and is of great significance.This article build large size mode with the finite element software PLAXIS,have analyzed characteristics of force and displacement inside retaining wall.Different kinds of reinforcement modes and different kinds of panel form’s retainingwall models are built, they are grouped and studied. Laws that lateral displacement ofretaining wall and load pull of wire mesh exist are put an important place to study inthis article. Main research achievements are as follows.1The influence that change ofthe soil friction angle brings to lateral displacement of retaining wall is biggest, is alittle bit bigger than the elastic modulus of soil, and cohesion is smallest,yet Theinfluence that change of the soil friction angle brings to stability of the retaining wallis biggest, is far greater than the elastic modulus and cohesion of soil.2When amount of reinforcement is same, alternate reinforcement can control lateraldisplacement of retaining wall better than grouping reinforcement, lateraldisplacement of retaining wall that stiffness alternate reinforcement generate is similarwith well-distributed,only value of number have a little increase, cut down the lengthof smaller stiffeness material can reduce mount of reinforcement, this brings littleinfluence to lateral displacement of the retaining wall.3When three or more kinds ofstiffeness material are mixed,deformation of the retaining wall will be control ifbiggest stiffeness material is put on the place where deformation is biggest.4Thelateral displacement that vertical panel of retaining wall generate is biggest underdifferent kinds of reinforcement modes, combined panel of retaining wall that mixvertical panel and tilting panel together is bigger,and tilting panel of retaining wall issmallest.5Keep spacing constant.and reduce some of material’s stiffness can controldeformation of the retaining wall better than increase spacing and keep stiffnessconstant or increase stiffness.6When stiffness of all of materials is same,and spacing is well-distributed, stiffness of material would not bring influence to strength anddistribution of tension, but strength of tension would increase with the increase ofspacing,and the form of panel has an important effect on strength and distribution oftension.7When stiffness of materials that alternate reinforcement choose have largedifference, the bigger stiffness materials would undertake most of earth lateralpressure, the spacing of the main reinforcement layer have effect on strength oftension and lateral displacement of retaining wall,and then impact local deformationof retaining wall.8When length and stiffness of material was alternated at the sametime, stiffness alternate would bring a bigger influence than length alternate, highstiffness material undertake more tension than small stiffness material, high stiffnessmaterial play a major reinforcement role.