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内蒙古土建学会于最近召开了公路系统水毁防治学术会议,讨论了水毁主要原因、水毁防治问题与冲刷计算公式的应用问题(略)等内容。甲.水毁的几个主要原因一、桥渡水毁原因(一)在桥位附近未能设置必要的防护工程(包括河道整治与桥头导流),河床容易产生不良变迁,改变了原来河床水流的动力状态,桥渡工程适应不了这些新的外在条件,造成的水毁,我区常见的几种河床变迁形式(包括不一定由于建桥所引起的河床天然演变的情况)有以下几种:1.河床逐渐扩宽。由于上游和岸滩逐年垦植,水土流失,加之水流的迂回摆动和侧向浸蚀,使河床逐渐扩宽。
Inner Mongolia Institute of Civil Society recently held a conference on highway system water damage prevention and control to discuss the main causes of water damage, water damage prevention and control problems and erosion formula (omitted) and so on. A few main reasons for the water damage First, the reasons for crossing the water damage (a) in the vicinity of the bridge failed to set up the necessary protection works (including river regulation and bridge diversion), the river bed is prone to adverse changes, changing the original riverbed Water dynamic state, the bridge crossing project can not adapt to these new external conditions, resulting in water damage, several common riverbed changes in our region (including not necessarily due to the bridge caused by the natural evolution of the river bed) are the following Species: 1. The riverbed is gradually widened. The riverbed has been gradually widened due to the annual reclamation of the upper reaches and the shore and the soil and water loss, coupled with the roundabout and lateral erosion of water currents.