预应力型钢组合支撑在大跨度基坑中的应用

Application of Prestressed Section Steel Composite Support in Large-span Foundation Pit

以杭州某基坑支护工程为例,论述了预应力型钢组合支撑技术的施工要点,并与传统钢筋混凝土支撑技术进行比较,指出其具有能够重复使用、工期短以及造价低等优势。最后,根据基坑监测结果,验证了其在基坑支护上的先进性和实用性。

Taking a foundation pit support project in Hangzhou as an example, this paper discusses the key construction points of the composite support technology of prestressed section steel, compares it with the traditional reinforced concrete support technology, and points out the advantages of reusability, short construction period and low cost. Finally, according to the monitoring results of the foundation pit, the progressiveness and practicability of such foundation pit support are verified.