导流隧洞混凝土衬砌施工技术

Construction Technology of Concrete Lining of Diversion Tunnel

导流隧洞是一个临时工程,在施工基坑的上游修筑围堰挡水,使原河道水流从上游围堰前导向下游围堰后。导流隧洞混凝土衬砌施工特点:工期时间短、断面大且长度较长、浇筑技术要求高。导流隧洞如果不能按期完成,将会拖延整个工程的工期,所以工期紧迫。因此,为了有效兼顾隧洞施工质量与效率,在导流隧洞混凝土衬砌施工时,要严格遵循设计以及相关规范的具体要求进行施工,还要在原材料、配合比、浇筑施工、顶拱浇筑等不同环节强化监督,实现对衬砌混凝土施工过程进行全方位的质量控制。为提高导流隧洞混凝土衬砌施工质量,还要采取一系列措施,这也是保障施工质量的关键。

the diversion tunnel is a temporary project,which is to build a cofferdam upstream of the construction foundation pit to retain water,so as to guide the original river flow from the front of the upstream cofferdam to the back of the downstream cofferdam.Construction characteristics of concrete lining of diversion tunnel:short construction period,large section and long length,and high pouring technical requirements. If the diversion tunnel cannot be completed on schedule,the construction period of the whole project will be delayed,so the construction period is urgent. Therefore,in order to effectively take into account the tunnel construction quality and efficiency, during the concrete lining construction of the diversion tunnel, it is necessary to strictly follow the specific requirements of the design and relevant specifications,and strengthen the supervision in different links such as raw materials,mix proportion,pouring construction and crown pouring,so as to realize the all-round quality control of the lining concrete construction process. In order to improve the construction quality of concrete lining of diversion tunnel,a series of measures should be taken,which is also the key to ensure the construction quality.