框架结构式的泥石流排导渠

本文介绍的是一种新型“空间框架网格结构型式的泥石流排导渠”。在四川省黑水县芦花沟泥石流工程中首次被采用,其结构特点是:排导渠的两侧墙肋板与渠底肋板连接在一起,基础墙和渠顶墙又与侧墙肋板连接在一起,构成一种空间框架网格型式。墙与渠底交接处,还采取了与框架浇筑成整体的贴角加强加固措施。渠底肋板的下游侧墙高出渠底30-50厘米。这种结构的主要优点是:1、能防止渠底的揭底破坏;2、能防止侧墙的冲刷破坏;3、能防止侧墙与渠底连接处的淘蚀破坏;4、更能保证排导渠的整体安全,并便于维修和管理。

Framework-type diversion canal for debris flow

This paper describes a new framework-type diversion canal. It wasfirst applied to debris flow control in Heishui county in Sichuan provin-ce. The characteristics of the structure are as follows: connecting thewall and bottom ribs with the foundation and top walls of the canal tomake up a framework. At the point of stress concentration between thewall and bottom of the wall of the canal, cast corners are used for rein-forcement. At the downstream of the bottom ribs, raising the bottom by30-50cm so as to retain a layer of debris flow for energy dissipation andbottom protection. Framework-type diversion canal for debris flow canprevent: 1) being scoured of canal bottom; 2) being undercut of canal walls; 3) damage to the stress concentration points between the wall andbottom of the canal. It also ensures the safty of canal, repair and management are easy.