The vehicle tunnels adopt box culvert advancing scheme under overlength pipe shed,which is the first case to underpass the west L-taxiway of Beijing Capital International Airport without suspending air service during construction in China.

The main body of this paper is the analysis of this problem, and indicates the factor of the box culvert advancing forward to the ground settlement and how to control it.

By analyzing the structure and the process of the fridge top cover, the mold structure design,the working process,design of the key parts of the mold and the application of the hydraulic neutron mechanism were introduced.

Taking the project of the highway from Zhengzhou to Kaifeng city applying the method of box-culvert advancing as an example, the mechanics action mechanism of the big cross section box-culvert advancing is analyzed.

Application shield driving method for box jacking construction in underpass of freeways has many advantages,such as without traffic interruption,unlimited distance,safe construction,little restricted by geological condition,lower construction price and shorter construction period,so,it has much value to popularize.