天水市群发地质灾害特征与成灾机理

张成航; 张茂省; 于国强

doi:10.13961/j.cnki.stbctb.2016.04.009

您当前的位置：

首页 >

文章列表页 >

天水市群发地质灾害特征与成灾机理

水保监测与应用技术

- 天水市群发地质灾害特征与成灾机理
- Development and Causes of Group Geological Hazard in Tianshui City
- 水土保持通报 2016年36卷第4期页码：46-50
- 作者机构：
  
  1. 国土资源部黄土地质灾害重点实验室,陕西,西安,710054
  2. 中国地质调查局西安地质调查中心,陕西,西安,710054
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目“高山峡谷区域暴雨泥石流成灾临界阈值研究”（41302224）;陕西省科学技术研究发展计划项目（2014KJXX-20）;国家地质找矿专项（12120114025901，121201011000150022）
- DOI：10.13961/j.cnki.stbctb.2016.04.009
  中图分类号：
- 纸质出版：2016
- 稿件说明：
移动端阅览
张成航, 张茂省, 于国强. 天水市群发地质灾害特征与成灾机理[J]. 水土保持通报, 2016,36(4):46-50.

ZHANG Chenghang, ZHANG Maosheng, YU Guoqiang. Development and Causes of Group Geological Hazard in Tianshui City[J]. Bulletin of Soiland Water Conservation, 2016, 36(4): 46-50.
张成航, 张茂省, 于国强. 天水市群发地质灾害特征与成灾机理[J]. 水土保持通报, 2016,36(4):46-50. DOI： 10.13961/j.cnki.stbctb.2016.04.009.

ZHANG Chenghang, ZHANG Maosheng, YU Guoqiang. Development and Causes of Group Geological Hazard in Tianshui City[J]. Bulletin of Soiland Water Conservation, 2016, 36(4): 46-50. DOI： 10.13961/j.cnki.stbctb.2016.04.009.

摘要

[目的] 对甘肃省天水市2013年“7·25”群发性山洪地质灾害的成灾特征、分布规律及其成因进行分析，为黄土丘陵沟壑区降雨诱发地质灾害早期识别和减灾防灾提供科学依据。[方法] 在全面实地调查的基础上，建立三维连续介质动态数值模型，对天水市典型滑坡运动特征进行求解。[结果] “7·25”山洪地质灾害具有普遍性，群发性明显，局地爆发性，隐蔽性强等5大显著特征；受强降雨和地震因素叠加效应的影响加剧了灾害的破坏程度；此次灾害大部分滑坡失稳的坡面几何形态多为直线型凹型面坡，滑坡失稳多发生在35°~45°坡度范围内，以40°坡居多，黄土坡面滑坡通常是窄条状、方量较小；典型滑坡体在斜坡运动过程中，平均速度、最大速度、总动能和总势能均是急剧增加，进入水平面后，各个动力参数急剧下降。侵蚀作用是滑坡运动中非常重要的不可忽视的一个重要的因素，它使得灾害体质量增加，同时依靠较高的速度（30 m/s），具有更强的破坏性。[结论] 天水市群发地质灾害形式依然严峻，降水是引发和加剧此次地质灾害的主要因素。

Abstract

[Objective] Through the investigation of the "7·25" massive mountain torrents geological hazards in Tianshui City of Gansu Province occured in 2013

we expected to reveal the landslide mechanism and provide a scientific basis for early identification

prevention

and reduction of rainfall-induced geo-hazards in the loess ridge-hill areas of China. [Methods] The characteristics

distribution law of geological hazards and its causes were studied. Three dimensional continuum dynamic numerical models were established to calculate the dynamic character of landslide in Tianshui City. [Results] The results showed "7·25" massive mountain torrents geological hazards had characteristics of occurrence universally

outbreak massively

locally and unnoticeably

and had strong hazard potentiality. The hazards were exacerbated by the effects of earthquake and rainfall. The slope geometry shapes of landslide in the torrent's geological hazard are linear concaved. Most slopes are in the range of 35°~45°

and among which

40° slopes were found more frequently. Loess slope landslide is usually in a narrow strip and with small volume. The average velocity

maximum velocity

total kinetic energy and potential energy of typical landslide increased dramatically in slope motion process. These indices dropped sharply after entering a horizontal plane. Erosion plays an important role in landslide movement

which make slope sliding in a high speed and lead to more destructive hazards. [Conclusion] The risk degree of group geo-hazards remains severe in Tianshui City. Precipitation is the main factor that cause and aggravate the geological disasters.

关键词

Keywords

references

黄玉华,冯卫,李政国.陕北延安地区2013年"7·3"暴雨特征及地质灾害成灾模式浅析[J].灾害学,2014,29((2):54-59.

Wang Genlong, Li Tonglu, Xing Xianli, et. Research on loess flow-slides induced by rainfall in July 2013 in Yan'an, NW China[J]. Environmental Earth Sciences, 2014, 73(12):7933-7944.

黄玉华,武文英,冯卫,等.陕北延安"7·3暴雨"诱发地质灾害主要类型与特征[J].西北地质,2014,47(3):140-146.

张成航,张建龙,冯立.四川省都江堰市虹口乡红色村干沟泥石流特征及危险性评价[J].西北地质,2014,47(3):126-132.

薛强,张茂省,曾庆铭,等.都江堰市龙池镇麻柳沟泥石流特征及形成条件分析[J].西北地质,2014,47(3):177-184.

王佳运,张茂省,贾俊,等.都江堰中兴镇高位滑坡泥石流灾害致灾成因与发展趋势[J].西北地质,2014,47(3):157-164.

梁京涛,成余粮,王军,等.2013年7月10日四川省都江堰三溪村五里坡特大滑坡灾害遥感调查及成因机制浅析[J].工程地质学报,2014,22(6):1194-1203.

于国强,张茂省,胡炜.天水市"7·25"群发性山洪地质灾害发育特征及成因分析[J].西北地质,2014,47(3):185-191.

郭富赟,孟兴民,黎志恒,等.天水市"7·25"群发性地质灾害特征及成因[J].山地学报,2015,33(1):100-107.

Chen H, Lee, C F. Numerical simulation of debris flows[J]. Canadian Geotechnical Journal, 2000, 37(1):146-160.

Chen H, Lee C F. A dynamic model for rainfall-induced landslides on natural slopes[J]. Geomorphology, 2003, 51(4):269-288.

Chen H, Dadson S, Chi Y G. Recent rainfall-induced landslides and debris flow in northern Taiwan[J]. Geomorphology, 2006, 77(1): 112-125.

Crosta G B, Chen H, Lee C F. Replay of the1987 Val Pola Landslide, Italian Alps[J]. Geomorphology, 2004, 60(1/2):127-146.

Erlichson H. A mass-change model for the estimation of debris-flow runout, a second discussion: Conditions for the application of the rocket equation[J]. Journal of Geology, 1991,99(4),633-634.

高克昌,韦方强,崔鹏.降水空间特征与泥石流沟分布的关系[J].北京林业大学学报,2007,29(1):85-89.

黄润秋,许向宁,唐川.地质环境评价与地质灾害管理[M].北京:科学出版社,2007.

张茂省,唐亚明.地质灾害风险调查的方法与实践[J].地质通报,2008,27(8):1205-1216.

唐川.汶川地震区暴雨滑坡泥石流活动趋势预测[J].山地学报,2010,28(3):341-349.

崔鹏,庄建琦,陈兴长,等.汶川地震区震后泥石流活动特征与防治对策[J].四川大学学报:工程科学版,2010,42(5):10-19.

Gray J M, Hutter K. Gravity-driven free surface flow of granular avalanches over complex basal topography[J]. Proceedings of the Royal Society of London, 1999, 455(1985):1841-1874.

浏览量

1147

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

宁夏回族自治区彭阳县地质灾害发育特征与形成条件分析

辽东半岛海岸侵蚀分布规律及其发育特征

福建省建瓯市地质灾害发育特征及形成机制

西陵峡水田坝区域地质灾害发育特征及成因机制

不同含水率条件下非饱和边坡的稳定性