Numerical Simulation Of Safety Of Wind-Resistant Open Cut Tunnel Of Second Lanzhou-Xinjiang Railway

As the only railway line to contact Xinjiang area and the Inland, the transport capacity and quality of the existing Lanzhou-Xinjiang Railway has gradually lagged behind the enhancement of the passenger service quality and the growth of freight traffic. In order to seriously carry out and execute the strategy of our country’s western development, safeguard the security of our country’s energy strategy, improve the railway transport capacity and promote the economic development of Xinjiang area, It’s going to build the second Lanzhou-Xinjiang Railway along the existing Lanzhou-Xinjiang Railway line for our country.There are some strong wind areas along the second Lan-Xin Railway.In order to maximally resist the wind sand and ensure that later the train can run safely in high speed, it is necessary to build an about60kilometers long assembled open-cut tunnel of reinforced concrete at the core zone of the Baili wind area and Thirty wind area.This wind-resist open-cut tunnel of such a scale is the first in the world.In this paper which is based on the project of wind-resistant open-cut tunnel of the second Lanzhou-Xinjiang Railway in Hami,a small city of Xinjiang province,and in which on-site physical monitoring test and finite element numerical simulation is used as the main method to research, the following aspects is studied(1) Under the harsh environmental conditions in Gobi,which kind of the structure form is the most favorable to open-cut tunnel,and how to design;(2) Through physical monitoring test, study on the force status of the connecting section steel at the segment joint of open-cut tunnel when the segment is being assembling;(3) Using ANSYS software to do numerical simulation so as to study the force status of open-cun tunnel of every segment joint under each condition.