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穿旭阳大道顶管工程,原设计方案为土压平衡的顶进方式穿越,在顶进过程中,发现顶管高程部位有砾石层,属较劣地质条件,如按原设计顶进,可能引起坍塌,为了保证工程安全、满足设计沉降值,剩余顶管采用浅埋暗挖施工方案,在成形的隧洞内将混凝土套管顶进,完成穿越。
Wearing Xuyang Avenue pipe jacking project, the original design options for the top of the earth pressure balance through the way, in the process of jacking, jacking pipe jacking site with gravel, is a worse geological conditions, such as according to the original design, may Causing collapsing. In order to ensure the safety of the project and meet the design settlement value, the remaining pipe jacking adopts the shallow-buried excavation construction scheme, and the concrete pipe jacking is advanced within the formed tunnel to complete the crossing.