[1]苏生瑞,李松,程强,等.汶川地震后公路边坡崩塌灾害发育规律[J].山地学报,2012,(03):321.
　SU Shengrui,LI Song,CHENG Qiang.Characteristics of the Postearthquake Rockfalls of Highway Slopes in Wenchuanearthquakestricken Areas[J].Mountain Research,2012,(03):321.
点击复制

汶川地震后公路边坡崩塌灾害发育规律()
分享到：

《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2012年03期
页码:
321
栏目:
山地学报
出版日期:
2012-01-01

文章信息/Info

Title:
Characteristics of the Postearthquake Rockfalls of Highway Slopes in Wenchuanearthquakestricken Areas
作者:
苏生瑞;李松;程强;
1.长安大学地质工程系，陕西 西安 710054；
2.甘肃省地质环境监测院，甘肃 兰州 730050；
3.四川省交通厅公路规划勘察设计研究院，四川 成都 610041
Author(s):
SU Shengrui; LI Song; CHENG Qiang
1.Department of Geological Engineering，Chang’an University，Xi’an 710054，China；
2. Gansu Institute of Geological Environment Monitoring，Lanzhou 730050，China；
3.Sichuan Provincial Communication Department Highway Planning Survey Design Research Institute，Chengdu 610041，China
关键词:
震后崩塌; 公路边坡; 失稳斜坡; 震裂山体; 映秀-卧龙公路
Keywords:
postearthquake rockfall; highway slope; rockfalld slope; seismic rocks; Yingxiu-Wolong highway
分类号:
P642.21
文献标志码:
A
摘要:
震后崩塌是强烈地震造成的震裂山体在后期余震、降雨及重力作用下变形不断发展并再次发生的崩塌。基于对四川省省道S303线映秀-卧龙段震后公路边坡崩塌灾害的调查,通过空间分布、崩塌与物质组成、岩性、失稳斜坡坡度、坡高、坡形、坡向和崩塌形成机理的关系等方面的分析,得到了震后崩塌灾害的发育规律:1.震后崩塌分布规律与地震时引发的崩塌的规律一致,即地震时易发生崩塌的地段地震后仍然易发生崩塌。2.按照边坡物质组成,以岩质边坡崩塌占绝大多数,岩土组合体边坡次之;较坚硬岩石中发生的崩塌多而较弱岩石中发生崩塌少,沿线发生崩塌最多的是岩性为闪长岩、辉长岩和变质砂岩等坚硬岩石组成的斜坡。3.失稳斜坡坡度在36°～85...
Abstract:
The postearthquake rockfall refers to such rockfall that is formed in seismicruptured rocks caused by the earthquake and falls due to progressive deformation resulted in the later aftershocks，rain and gravity. Based on site investigation of the slope rockfall in the highway S303 from Wolong to Yingxiu in Sichuan province after Wenchuan earthquake，through the analysis of the space distribution，the relationship between rockfall and composition，lithology，and gradient，height，configuration and direction of slopes as well as the formation mechanism of the rockfalls，the development rules of the postearthquake rockfalls are obtained：1）Distribution rule of rockfall after the earthquake is the same with that during the earthquake，that is，the place where rockfall occurs easily during the earthquake is still the same where rockfall occurs easily after the earthquake. 2）According to the material composition of slope，most rockfalls are rock slope rockfalls，and then are rocksoil slope；the numbers of rockfalls in harder rocks is more than that in softer rocks，i.e.，most rockfalls are formed in diorite，gabbro and metasandstone. 3）The gradient of rockfall slope is between 36°~85 °，mostly between 41°~ 60°，that is to say，postearthquake rockfall occurs easily on slopes with gradient above 40°. What’s more，there is an obvious difference in slope gradient between the highway from Yingxiu to Genda and from Genda to Wolong. The predominant slope gradient from Yingxiu to Genda is 46~60°，while that from Genda to Wolong is 41°~55°. 4）Postearthquake rockfall occurs easily on slope with height above 150m and there is an obvious difference in slope height between the highway from Yingxiu to Genda and from Genda to Wolong. The slope height from Yingxiu to Genda is mainly between 51~350 m，while the height of most of the rockfall slopes from Genda to Wolong is less than 200m，especially most less than 100 m. 5)There is a remarkable difference in the number of rockfall between sunny and cloudy slope. 6）The formation mechanisms of the postearthquake rockfall are primarily sliding rockfall and dumping rockfall.Since the Yingxiu-Gengda and Gengda-Wolong lies in the different geological units which have difference in lithology，the gradient，height of slopes where rockfall occur and the rockfall mechanism is different.

相似文献/References:

[1]丁瑜,乔建平,王全才,等.拉力分散型锚索在边坡二次加固中的应用[J].山地学报,2011,(04):499.
　DING Yu,,et al.Application of Dispersiontype Tensile Cable on Secondary Reinforcement in Slope Engineering[J].Mountain Research,2011,(03):499.

备注/Memo

备注/Memo:
收稿日期(Received date)：2011-08-20；改回日期(Accepted) : 2011-08-30。
基金项目（Foundation item）：西部交通建设科技项目(2009 318-000-095)资助。\[ Supported by the Western Science and Technology Construction projecn(2009-318-000-095) . \]
作者简介（Biography）：苏生瑞( 1963-)，男，汉族，博士，教授, 主要从事地质灾害与地应力场等方面的研究。\[Su Shengrui( 1963-), male, the Han nationality, Docotor, Professor, works fields mainly covering geohazards and earth’s stress field etc. \] E-mai:shengruisu@ 163.com
更新日期/Last Update: 1900-01-01