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Reinforced Geosynthetic Material Handling Vehicle Dumpping Technology Application Research

Posted on:2014-01-12Degree:MasterType:Thesis
Country:ChinaCandidate:Q P WuFull Text:PDF
GTID:2252330425992217Subject:Geotechnical engineering
Abstract/Summary:PDF Full Text Request
The phenomenon of Abutment vehicle jump is high speed, level and one of thecommon engineering problems of the highway,is the world of transportationengineering problems. Along with the social progress and development,highway hasbecome an indispensable important infrastructure modernization,if the abutment backbackfill properly treated,easy to cause the abutment of jump car phenomenon occurs.Abutment trip in each grade highway potential harm is great,not only affect the ridecomfort,and reduce the traffic safety,and makes the bridge pavement acceleratingdamage, increase the cost of bridge maintenance,serious economic losses and socialimpact. Therefore, how to effectively bridge abutment back backfilling soiltreatment,effective control of vehicle dumpping,ensure the normal order of thehighway traffic safety,high-speed operation has aroused global attention.The organic polymer geosynthetic materials are widely used in engineering,earthwork chamber is geosynthetic materials has good mechanical properties of newmaterials. This article on how to control the abutment vehicle technology research,first of all, large room reinforcement processing vehicle dumpping problem isanalyzed with mechanics, and studies the characteristics of using large chambermaterials and performance, consider the level of the large room shear stress,calculation under the action of horizontal shear stress of the foundation and theinternal stress field and displacement field on the basis of the analysis of large roomreinforcement units back filled soil mechanics mechanism of differential settlement.In this paper, through theoretical calculation, the paper analyzes the presence of largeroom of reinforced embankment settlement and the change law of abutmentcalculation results show that the subgrade settlement is an important cause of unevensettlement, reasonable reinforcement can reduce the abutment and embankmentsettlement between the steps. By applying the subgrade settlement of bridge abutmentof ABAQUS finite element numerical analysis shows that the subgrade settlement decreases with the increase of reinforcement layer, have played an important role inreducing differential settlement; Optimization design of reinforced layer spacing caneffectively reduce the economic costs; The abutment anchoring depth has a certaininfluence on subsidence; On the premise of ensure the safety of structure,optimization choose abutment materials can effectively control the abutment andembankment deformation and coordination;To ensure the effect of the large roomabutment anchoring can better play a role of reinforcement;Large room reinforcementhas obvious effects on settlement.In this paper, by combining large room reinforcement processing abutment jumpcar technology application methods of research, can effectively reduce the abutmentof subgrade settlement difference, meet the specification requirements, delayed theabutment of jump car phenomenon occurred time, reduce maintenance costs, trafficengineering for this kind of project the establishment of a scientific and reasonablequantitative or qualitative theoretical calculation and numerical analysis method,which can effectively improve the level of its design calculation and analysis.
Keywords/Search Tags:Geocells, ABAQUS finite element, Vehicle bump at bridge headBack filled soil, Reinforced soil
PDF Full Text Request
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