城市中心区管廊浅埋暗挖暗做检查室施工技术

Construction Technology of Shallow Buried,Concealed Excavation and Concealed Inspection Room for Pipe Gallery in Urban Central Area

在我国各大城市现代化建设中,各类地下市政管线、管廊多采用浅埋暗挖法,主要通过明挖竖井,在设计检查室位置上施做出土竖井并兼检查室结构。由于隧道施工周期较长,导致需长期搭设竖井围挡作业区,竖井上方如若存在地下管线或临近的重要建(构)筑物,对竖井施工都将带来影响。文章结合南长街至北长街热力管线工程,通过在主线隧道两侧设置旁井,施工出土横通道至主线隧道解决隧道出土作业问题;检查室通过渐变扩大隧道断面形式以满足设备安装空间要求;组合使用人工挖孔法施做检查室人孔以满足运行期间人员出入检查室需求。在有限的时间和空间内,实现快速施工,具有重要的现实意义。

In the modernization construction of China's major cities,various kinds of underground municipal pipelines and pipe galleries mostly adopt the shallow buried and concealed excavation method,mainly through the open excavation of the shaft,in the design of the inspection room location,the excavation of the shaft and the inspection room structure.Due to the long construction period of the tunnel,it is necessary to set up the shaft enclosure operation area for a long time.If there are underground pipelines or adjacent important buildings(structures)above the shaft,the construction of the shaft will be affected.Combined with the thermal pipeline project from Nanchang Street to Beichang street,by setting side wells on both sides of the main line tunnel,the excavation cross passage is constructed to the main line tunnel to solve the excavation operation problems of the tunnel;the inspection room gradually expands the tunnel section form to meet the requirements of equipment installation space;the combination of man-made hole digging method is used to make the inspection room manhole to meet the needs of personnel access to the inspection room during operation.In the limited time and space,it is of great practical significance to realize rapid construction.