In the project of cross-under the highway with pipe roof and culvert box method,the interspace between culvert box and pipe roof is limited by several factors.

• 管棚-箱涵法下穿越高速公路工程中,管棚与箱涵的建筑空隙受到多方面因素影响, 合理的建筑空隙在保证不增加成本的条件下,为施工带来方便。