预制装配式渡槽型农渠设计理念及实用性探究

A Probe into the Design Idea and Availability of Pre-installed Aqueduct Field Lateral

针对填方衬砌农渠在施工与运行过程中存在的问题,结合梁式渡槽的功能特性,提出了运用柔性榫结构及连接支墩实现纵向铰接式连接的预制装配式渡槽型农渠的新设计理念。详细介绍了渡槽型农渠的结构形式及细部构造,同时探讨了其设计和施工要点。通过预制装配式渡槽型农渠与填方衬砌农渠在功能、防渗效果及经济技术等方面的对比分析,得出渡槽型农渠占地面积及填筑渠道土方量较少,抗冻胀能力较高,在不考虑现场装配费用时其造价低于填方衬砌农渠。

Combined with the features of beamed aqueduct ,the type of aqueduct field lateral with pre-installed as a new design idea which adopts the flexible tenon joint structure and pier connecting in longitudinal was put forward in view of the fill-lined field lateral encountered some problems in process of constructing and operating .The structure form and detail of construction of aqueduct field lateral were introduced in this paper .And the key points of design and construction were explored at same time .The pre-installed aqueduct field lateral was compared with fill-lined field lateral including the function ,seepage-proofing effect and economical availa‐bility .The results show that the pre-installed aqueduct field lateral is smaller than the conventional filled channel in land and earth volume and the frost resistance will be improved evidently .In addition ,the cost is lower than the fill-lined field lateral when the in‐stallation cost will not be considered .