成昆铁路泥石流防治工程运行效果浅析

ANALYSES ON EFFICIENCIES OF DEBRIS FLOW PREVENTION WORKS ALONG CHENGDU-KUNMING RAILWAY

概述了成昆铁路沿线泥石流防治工程基本情况及此次调研工点简况．对调研工点所建工程的运行效果进行了较系统的分析，对各类工程的主要技术参数进行了讨论，并在此基础上提出了改善工程防灾效能的若干对策．这对今后泥石流防治有很现实的意义．

Since 1972,a great amount of protective constructions against debris flow have been built along Chensdu-Kunming Railway, which spended over 200 million yuan (RMB). These engineerings include chiefly drainage ditch,check dam,bypassing structure and resisted pile. Through paying a systematic return visit and investigation for these engineerings,it was found that most of them have made the investment yield well so as to promote the safety of railway operation.In this paper, the debris flow disasters and the protection constructions along ChengduKunming Railway have been outlined. In order to understand the working situation,the engineerings in 40 debris flow Sullies were surveyed and analysed emphatically in 1992. Among them,there are 5 debris flow gullies in which the aqueduts were built(taking the proportion of 13% in total), 32 debris flow gullies in which the drainage ditches were constructed (80% ), 17 debris flow gullies in which the check dams were erected (43% ) and 3 debris flow gullies in Which the resisted piles were constructed (8% ). Then,the efficiencies of these works, which were surveyed in the investigation,have been analysed and assessed in an all-round way,and the main technical factors for all kinds of works have been discussed in the meantime. Finally,several countermeasures to improve prevention engineering efficiencies are presented.