逆作法在给排水管道工程中的应用

Application of Reverse Construction Technology to Water Supply and Drainage Engineering

逆作法是一种先在地下进行由几排咬合水泥搅拌桩组成的圆形筒体结构的施工,再自上而下分层开挖,并紧贴水泥搅拌桩筒体内侧砌砖或进行钢筋混凝土内衬,形成一个稳固的地下结构的施工方法。宁波市江北中心区域优质供水工程施工即采用了该技术,有效解决了工程中紧邻建筑物做顶管井而影响周围建筑安全的施工难题,施工周期短、造价低、安全可靠、环保,并可节约大量钢筋混凝土。

Reverse construction technology is a method in which an underground tube structure is composed of interlocked cement-mixed piles, and layered excavation proceeds from top to bottom with brickwork or reinforced concrete lining attached to the inner side of cement-mixed pile tube structure, so as to form a stable underground construction. The water supply project in Jiangbei district of Ningbo City adopted this technology, thus resolving the security problems of surrounding buildings arising from the construction of pipe jacking well for adjacent buildings. It has advantages of short construction period, low cost, safe reliability and environmental protection, and saves great quantities of reinforced concrete.