Abstract:

The study of the force influence of asymmetrical pressure on boxtype shed structure is very important to provide theoretical basis for some similar projects. As a result, a road shed is taken for an example to carry out calculation and analysis by ANSYS finite element numerical simulation method. The results show that: (1) The bearing force on the bottom of the side wall and the top of the outside wall of the boxtype shed with eccentric backfilling is relatively large, which need to be strengthened in the design of reinforcement. (2) The lateral stress of backfilled soil on mountain side has a great influence on the structure of the shed; the structure internal force of the backfill can be improved by grouting to reduce the internal force of the shed; the economic benefits can be the highest when the internal friction angle reaches 47°. (3) The backfill of EPE on top of open tunnel can reduce the load impact on tunnel top and the internal force, and the optimal backfill thickness is 0.9 m.

Key words: boxtype shed, mechanical properties, lateral pressure coefficient, EPE, finite element simulation