Study On Engineering Properties Of Aeolian Sand Retaining Wall Reinforce

Our country is very lack of building materials in desert areas, but has a wealth ofaeolian sand. Aeolian sand as fill material is not only very convenient, but also can reducethe cost of the project to a large extent. But aeolian sand as building materials has manyproblems, such as grain composition is harmful, poor water retention, compactiondifficulty carrying capacity study of shear strength and low defects. How to improve thebearing capacity of aeolian sand and the study on the compaction mechanism of aeoliansand is becoming a urgently current road construction problems to be solved. In view ofthis, the paper stydy on the aeolian sands of the central region of Inner Mongolia XiangShawan area, establish a wrap-reinforced retaining wall model, and use ANSYS finiteelement software built on the solid model simulated. The main work is completed asfollows:Firstly, according to the characteristics of aeolian sand in central Inner MongoliaXiang Shawan, we sampling and study it to determine the natural aeolian sand moisturecontent, particle size distribution curve, maximum dry density, optimum moisture contentand other indicators.The cohesion and internal friction angle of aeolian sand with water inwet compacted state and natural state were measured with the direct shear tests.And wemake a comparative analysis.Secondly,we measured the coefficient of friction between geotextile and eolian sandon the basis of various indicators has been measured. Make a test model box according tothe principles of friction, compact the aeoliad sand, and mesure the nexuiz that thegeotextile be pulled out.And accord to the contact area to calculate the coefficient offriction.the required measurement geotextile tension and friction calculated in accordancewith each and the contact area of aeolian sand coefficient, by changing the length of thetop of the aeolian sand and geotextile pressure and the contact area of aeolian sandmultiple measurements and calculate the coefficient of friction, and finally averaged.Thirdly, Compares changes in aeolian sand wrapped around the carrying capacity.After reinforced retaining wall wrapped around three sides of the wall model builded, respectively, after aeolian sand compaction and not wrapped parcels stratified hierarchicalcompaction. Determination of bearing capacity of composite plate loading test according tothe experimental procedure, and the determination of aeolian sand carrying capacity in theuncoated state. By measured data and load and Settlement ps curve analysis andcalculation of the change of aeolian sand wrapped around the carrying capacity.Fourthly, Make sure the anti-packet and determine the length of the geotextile layerthickness and wrap rolled several times. According to the formula of lateral earth pressure,and use of geotextiles and experimental determination of aeolian sand friction coefficient,calculated cloth workers unearthed anti-packet length. Then each of30cm,40cm,50cmloose lay thickness of aeolian sand compaction and compaction effect is detected in orderto determine a reasonable loose laying thickness and rolled several times.Finally, Loading the model established entity retaining walls on large area andobserving its lateral displacement. Experimental data measured as a basis for modeling andanalysis by ANSYS finite element software, the results are basically consistent with theexperimental results. And compare changes in vertical displacement and aeolian sandwrapped around the lateral displacement of the model, the results show the lateraldisplacement of the retaining wall and wrapped vertical displacement are both becomesmall and lateral displacement are more obvious; wrap-reinforced block Minimum sidewalls under its own weight of maximum lateral displacement is generally distributed in theretaining wall height of2/3, and the lateral displacement from the maximum displacementgradually decreasing tendency towards above and below the outer end of the retaining wallthe displacement distribution in the low end of the retaining wall; from the point ofmaximum tensile stress reinforcement layers can be seen wrapped in connection reinforcedretaining wall damage or potential slip interface interface shape, approximately in line with0.3H type. Finally, analysising the different effects of lateral displacement of the retainingwall that the dry aeolian sand and the wet aeolian sand made.