Say that it digs bridge beam structure to change stealthy lid

The utility model relates to a say that it digs bridge beam structure to change stealthy lid, including setting up apron, side wall, supporting construction, envelope, the layer board at the subsurface, the side wall is equipped with envelope outward, supporting construction is including middle stake. The utility model discloses envelope warp the reduction, has reduced the engineering volume of interim support, has improved the security of engineering construction, has also reduced the influence to all ring edge borders. 本实用新型涉及种道改隐形盖挖桥梁式结构，包括设置在地面下的盖板、侧墙、支护结构、围护结构、层间板，所述侧墙外设有围护结构，所述支护结构包括中间桩。本实用新型围护结构变形减少，减少了临时支撑的工程量，提高了工程施工的安全性，也减少了对周边环境的影响。