市政管廊基槽支护的岩土问题及设计

Geotechnical Problems and Design of Foundation Groove Support for Municipal Pipe Corridor

针对翔安南路(滨海东大道—翔安大道段)综合管廊基槽工程中出现的岩土问题,在掌握了综合管廊施工技术、基槽承载能力、定向要求、不良地形地质条件的基础上,提出市政管廊基槽支护设计方法,分别采用分台阶和钢板桩作为基槽支护的方法,可满足工程项目的建设需求,并对基槽内被动土压力值进行折减修正,降低和减少支护结构变形概率。

In view of the geotechnical problems in the foundation of Xiang'an Road(Binhai East Avenue-Xiang'an Avenue section)integrated pipe corridor,based on the comprehensive pipe corridor construction technology,the bearing capacity of the foundation trough,orientation requirements,and poor terrain and geological conditions,the support design method of the municipal pipe corridor foundation trough is proposed,and the sub-step and steel sheet pile are adopted as the foundation trough support method.It can meet the construction needs of engineering projects,and reduce the value of passive earth pressure in the foundation groove to reduce the deformation probability of supportingmechanism.