震灾铁路线路修复方案优化设计方法研究OA北大核心

Under the influence of earthquake or secondary geological disasters caused by earthquake,it will lead to the dislocation of railway lines,which will not only affect the normal operation of railway,but also cause serious railway safety accidents.Aiming at the problem of repairing the dislocation line,taking a railway tunnel line dislocation as an engineering case,the minimum engineering quantity as the remediation goal,the provisions in the Code for Design of Railway Line as the constraint condition,and the calculation of the comprehensive elements of the curve as the calculation method,a repair scheme for railway line dislocation is proposed,which can maximize the use of the original line for repair to reduce the amount of engineering.Combined with SIMPACK simulation software,the three-carriages simulation model of vehicle dynamics is created with the parameters of CRH2G EMU,and the dynamic response analysis of repair scheme of the tunnel line is carried out from the perspective of safety and stability.The results show that the repair length of the line is only about 410 m longer than the original line,and the proportion of using the original line is 84.6% .In the process of vehicle simulation operation,the dynamic response of the head car and the tail car is large,and the dynamic response of the middle car is small.After the main analysis of the head car and the tail car,it is concluded that the vehicle dynamics index meets the specification limit.It is proved that the repair scheme of the line can not only reduce the engineering quantity by using the original line as much as possible,but also satisfy the safety and stability of vehicle operation.