地下多层结构预应力钢支撑施工方案研究

STUDY ON CONSTRUCTION SCHEME FOR PRESTRESSED STEEL SUPPORT FOR UNDERGRO UND MULTI-LAYER STRUCTURE

在地下结构施工中,基坑支护工程由于难度大、施工周期长、安全性要求高,一直都是地下结构施工中的重点和难点。在地下多层结构施工中,维护设施的安全以及施工的高效十分重要,以某地铁站施工为例,提出了一套地下多层结构预应力钢支撑施工方案,包括钢支撑安装与拆除流程、荷载与位移监测措施、预应力施加方案等。通过实际工程的验证,证明了提出的地下多层结构预应力钢支撑施工方案的有效性。

In the construction of underground structures,it is always critical to complete foundation pit supports due to significant construction difficulties,long construction periods and high safety requirements.The safety of maintenance facilities and high efficiency of construction are essential during the construction of underground multi-layer structures.Taking the construction of a subway station as an example,a construction scheme was proposed for the prestressed steel support of the underground multilayer structure,including steel support installation and demolition,load and displacement monitoring,prestressing and the like.The effectiveness of the construction scheme for prestressed steel supports of underground multi-layer structures was proven through verification in engineering practice.