Research On The Settlement Of Zhongyi Road In Wuhan Crossing Under The Existing Railway Lines

With the fast passenger transportation, more and more railway grade crossingsare overtaken by interchange crossing. For safety and comfort, stability and beauty,the consideration of length of service, it puts forward high demands on the control ofsettlement.This article is based on the underpass engineering of existing railway lines inZhongyi Road in Wuhan (development avenue~happiness avenue), it analyzed thejacking construction technology and procedure, took settlement deformation as themain control target, railway, highway subsidence deformation mechanism is studied,and the displacement monitoring analysis and numerical simulation predictioncalculation of the roadbed settlement for each time period is carried on, highway,railway dynamic load and the superposition effect of both has been carried on. Thesettlement mechanism is discussed, corresponding solution and advice is put forwardaccording to the factors of settlement. The scientific, effective prediction andpowerful, strict control of post-construction settlement based on thethree-dimensional transportation system, has great theoretical significance and greatsocial and economic benefits for the current rapid transit system design, construction,road system upgrades, and later operation maintenance.This passage draws the following conclusions:(1) The settlement caused by car dynamic load is slightly superior to car static load.When the car is at a speed of15m/s，the settlement of dynamic load and staticload of is0.9958mm and0.9939mm respectively.(2) When speed is low, at the same speed, the settlement caused by car load is biggerthan train load. When speed is larger, at the same speed, the settlement caused bytrain load is greater than that caused by the car load.(3) The settlement is increasing with the speed of car and train increasing，and isdecreasing with the depth of soil ground increasing.The settlement of the top ofsoil ground caused by car and train is up to0.9mm and0.6mm respectively.(4) The settlement is greater when cars and trains work together than a car or train works separately. With different speed combinations of car and train, result indifferent embankment settlement. Embankment settlement is strongly influencedby car load.