[1]周明慧,熊海贝*,赵书平,等.泥石流冲击力简化计算方法——以舟曲县三眼峪泥石流为例[J].山地学报,2017,(02):187-194.[doi:10.16089/j.cnki.1008-2786.000211]
　ZHOU Minghui,XIONG Haibei*,ZHAO Shuping,et al.Simplified Calculation of Impact Force of Debris Flow Based on the Case Study of Sanyan Valley Debris Flow[J].Mountain Research,2017,(02):187-194.[doi:10.16089/j.cnki.1008-2786.000211]
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泥石流冲击力简化计算方法——以舟曲县三眼峪泥石流为例()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2017年02期
页码:
187-194
栏目:
山地灾害
出版日期:
2017-03-30

文章信息/Info

Title:
Simplified Calculation of Impact Force of Debris Flow Based on the Case Study of Sanyan Valley Debris Flow
文章编号:
1008-2786-(2017)2-187-08
作者:
周明慧1; 熊海贝1*; 赵书平2; 曹纪兴1
1. 同济大学 结构工程与防灾研究所,上海 200092;
2. 甘肃省陇南市地质灾害应急中心,甘肃 陇南 746000
Author(s):
ZHOU Minghui1; XIONG Haibei1*; ZHAO Shuping2; CAO Jixing1
1.Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China;
2.Geological Disaster Emergency Center of Longnan City,Gansu Province,Longnan,746000,China
关键词:
泥石流; 破坏模式; 冲击力; 流体模型; 简化计算
Keywords:
debris flow;  failure mode;  impact;  fluid model;  simplified calculation
分类号:
P642.23
DOI:
10.16089/j.cnki.1008-2786.000211
文献标志码:
A
摘要:
基于舟曲县三眼峪泥石流灾害的实地考察和资料分析,对该地区常见的夯土木构、砖木结构、砖混结构和框架结构4类典型受损的结构形式进行了分析,确定建筑物的破坏模式主要为淤埋破坏和倒塌破坏。对现有的泥石流冲击作用计算公式进行了分类整理,以三眼峪泥石流实测数据为例对比分析整体冲击力和大石块冲击力的不同计算理论和计算结果。为便于工程技术人员进行房屋抗泥石流设计,提出了基于泥石流深度并考虑泥石流动力效应的设计计算方法,给出了以三眼峪泥石流为例的动力影响系数设计值和设计泥石流深度取值范围;并对当地典型夯土木结构房屋进行了泥石流安全性分析。此简化计算方法物理意义清晰,计算快捷有效,可用于泥石流多发地带的设计荷载计算,其关键参数泥石流深度可根据当地常年记录以统计值采用,动力放大值可根据沟床纵比降和沟床糙率系数确定。
Abstract:
Based on field surveys on Sanyanyu debris flow gully in Zhouqu County and analysis of associated data,in this study it conducted an technical evaluation on performances of local building structures against debris flow. According to damage patterns,four types of house structures were sorted out for demonstration,which were rammed earth-wooden structure,brick-wood structure,brick-concrete structure and frame structure,typically subjected to two principal types of loading modes,either burying by silts or collapsing due to colliding. Comparison was made to examine calculation differences between some of available equations,when actual measurement data collected from the Sanyanyu debris flow were used for calculation of debris flow impact incurred by both debris flow fluid and big boulders floating in debris flow body. Then it analyzed the derivations of these equations and interpreted the corresponding calculation results. For facilitating engineering and technical personnel to design structures with sufficient resistance to debris flow,a proposed equation then was introduced by integrating the depth of debris flow with dynamic effect of debris flow. The suggested expression was readily to set a proper value range for coefficients of dynamic effect and depth of debris flow in practice,and it had been verified by a case study for examining the design of a typical local rammed earth-wooden structure against debris flow in the Sanyanyu.The optimized simplification gave this method good advantages in a better understanding of its physical significance and its higher efficiency in determination of design load in engineered control of debris flow-prone regions. Moreover,it is quite technically feasible for engineers to gain some key prerequisite parameters to use the equation. For example,the value of debris flow depth could be substituted by an average value according to local historic observations. And the values of dynamic effect could be determined by combination of the value of vertical slope of gully bed and the roughness coefficient.

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备注/Memo

备注/Memo:
基金项目(Foundation item):国家科技支撑计划项目(2014BAL05B01)[National Science and Technology Support Program(2014BAL05B01)]
作者简介(Biography):周明慧(1990-),男,湖南邵阳人,硕士研究生,从事泥石流下结构安全性研究。 [Zhou Minghui(1990-),male,born in Hunan,M.Sc. candidate,research on structural safety under debris flow] E-mail:zmh092764@qq.com
*通信作者(Corresponding author): 熊海贝(1964-),女,上海人,教授,主要从事结构抗震、结构工程监测与检测、木结构工程等。 [Xiong Haibei(1964-),female,born in Shanghai,professor,undertaking research on seismic performance of building structures,structural health monitoring and assessment,timber engineering,etc.] E-mail:xionghaibei@tongji.edu.cn
更新日期/Last Update: 2017-03-30