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近年以来,本人参加山区公路养护工作,曾对桥梁水毁情况,进行了初步调查。现将个人在实际工作中的一点体会和对山区桥梁水毁防治意见,介绍如下,以供有关同志们的参考,并请指正。(一)本地区河流的特征。本地区主要干线的桥梁,绝大部分跨越流送(木材)和泥石流河流。河流的特征是:纵坡大、水流急、河岸不稳定;平时水枯,一到雨季,流量骤增,水势汹涌,冲刷激烈。加以近年来当地森林工业发展迅速,木材流送量大,沿线路基桥涵被毁情况,更为普遍,严重影响洪期交通。(二)桥梁水毁的几种类型。1.桥位选择不当,桥基遭受水流冲刷和漂木撞击,
In recent years, I participated in mountain road maintenance work, had a preliminary investigation of the bridge destroyed. Now personal experience in the actual work and the bridge damage prevention and treatment of mountain views, introduced below, for the comrades for reference, and please correct me. (A) The characteristics of rivers in the area. Most of the major trunk bridges in the region cross the stream (timber) and mudslides. The characteristics of the river are: large longitudinal, rapid water, river bank instability; usually dry, one to the rainy season, surge in flow, water potential turbulent, intense erosion. In recent years, the rapid development of the local forest industry, large timber flow, destruction of bridges and culverts along the roadbed are more common and seriously affect the flood traffic. (B) bridge destroyed several types. 1. Improper choice of the bridge site, the abutment suffers from water scour and drift wood impact,