Study On The Design Technology Of Multicell Precast Box And Slab Culvert Structure

According to a survey about the main problems existed in highway constructionin xinjian suggests that subgrade on the high side, highway construction and thesurrounding natural environment uncoordinated is one of the main problems ofhighway construction in xinjiang[1].Roadbed height have a great relationship with thechoice of the drainage patterns.Especially in the region of xinjiang, the special climateenvironment is day and night temperature difference big, dry little rain, evaporation ofclimate characteristics.Route in the path of the gap is more and river has thecharacteristics of wide shallow seasonal pulse.Selection in the drainage ways oftengive priority to with large, medium and small bridges, bridge building height is highbecause according to the rules and regulations of highway Bridges to meet therequirements of obstacle clearance under the bridge the road design elevation on thehigh side.How to satisfy the requirement of drainage in at the same time, change thebridge drainage to porous culverts and drainage, to reduce the roadbed height is themain content of thesis research.After comparative analysis of the choice prefabricated porous composite boxculvert resolve the above problems as the research object.According to the survey datashows that the prefabricated porous composite box culvert hole number, can not onlymeet the water, and has the characteristics of low building height, in road applicationcan effectively reduce the roadbed height, good durability, should not be damaged, tolater period maintenance, maintenance, and quality detection, etc.Based onprefabricated porous composite box culvert research status.This paper mainly in thefollowing aspects of prefabricated porous composite box culverts are studied:(1) This article summarizes the current domestic culvert structure types, bycomparing the current foreign prefabricated culvert structure and features applicableto the choice of the size parameters of different structural prefabricated unit designdetails.Precast and prefabricated box culvert units are connected, and import and export structure has been designed.(2) Fabricated porous box board combination culvert structure, including culvertload calculation method, the internal force calculation formula of each component ofthe culvert, culvert cross-section internal forces and Foundation Bearing Capacityformula is derived.(3) Prefabricated porous box board combination culvert calculation instance,components analysis of culvert under load force, different geometry size is analyzedrespectively, and the influence of different filling height of culvert stress.Prefabricated porous box board composite culvert section design reference.(4) ANSYS finite element software simulation the fabricated porous box boardcombination culverts prefabricated unit under load each unit member forces variationanalysis of force structure characteristics and cracking crack distribution.(5) Prefabricated porous box board combination culvert design and constructionkey points of technology research. Matters needing attention during the design andconstruction of culvert structure explained, construction should be according to thedesign requirements.