Research On Influence On The Inner Ring Expressway's Safety Brought By Construction Of Parking Orbit Segment

With the rapid development of our economy and the unceasing change of population structure,the current urban traffic conditions have been unable to meet the increasing demand of urban population,infrastructure construction and the construction of the urban traffic is the lifeblood of a city's economic development,If urban infrastructure construction is not perfect and the urban traffic congestion is serious,it will restrict the development of the city,affects the city image.Urban rail transit,as an important part of urban infrastructure and urban traffic,provides a convenient city life to people,well suits the fast-paced life of city people.this paper studies on TuShan orbit around the car depot close to the inner ring expressway,the disturbance of soil around is caused easily in the excavation engineering in construction,the basis of the surrounding buildings and fast loop causes deformation,if deformation is too large,it will directly affect the use of the inner ring expressway safety.So before car depot construction,research on the effects of the inner ring expressway ensures safety and economy significance.According to relevant data and information provided by engineering,theoretical research and investigation on the related calculation,concrete results are as follows:?A careful investigation has carried on the current situation of this segment of the inner ring expressway,the inner ring expressway' location of the transverse crack,longitudinal crack has been got.?Through the numerical simulation based on the finite element software ANSYS,the calculation according to the supporting form,plane position,excavation depth are carried on the comprehensive consideration,four typical sections that may cause impact on the inner ring highway have been taken into calculation and analyzed to get all sorts of each step excavation support construction under the condition of displacement,force size,the inner ring fast rodents,the maximum horizontal displacement value and maximum vertical displacement value,all of these is less than the specified value,showed less effect on the inner ring expressway highway slope excavation.Supporting structure first principal stress,the third principal stress' s maximum value,are less than concrete's largest tensile and compressive stress.?According to the results of finite element calculation,selection of the most unfavorable section pile retaining wall :A8 section,the construction step 7,have been selected to carry structure calculation.And the cross section strength meets the requirements.?According to the results of finite element calculation and monitoring of the measured data,the contrast between the differences,and analysis,comparing with the field monitoring data,the accuracy of the numerical simulation method has been verified.