藏东南鲁朗-通麦崩塌滑坡孕灾地质背景特征研究

张佳佳; 陈龙; 王军朝; 李元灵; 高波; 石胜伟

doi:10.12090/j.issn.1006-6616.2018.24.04.049

藏东南鲁朗-通麦崩塌滑坡孕灾地质背景特征研究

doi: 10.12090/j.issn.1006-6616.2018.24.04.049

张佳佳^{1, 2,},
陈龙^{1, 2},
王军朝^{1, 2, ,},
李元灵^{1, 2},
高波^{1, 2},
石胜伟^{1, 2}

1.
中国地质科学院探矿工艺研究所, 四川成都 611734
2.
中国地质调查局地质灾害防治技术中心, 四川成都 611734

基金项目:

中国地质调查局地质调查项目 DD20160279

详细信息

作者简介:
张佳佳(1988-), 男, 工程师, 主要从事活动构造与地质灾害研究。E-mail:jimjia2008@163.com

通讯作者:
王军朝(1973-), 男, 高级工程师, 主要从事地质灾害调查与评价。E-mail:wjunchao@mail.cgs.gov.cn

中图分类号: P642.2
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- 文章访问数: 320
- HTML全文浏览量: 154
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- 被引次数: 0
出版历程
- 收稿日期: 2017-12-27
- 修回日期: 2018-05-19
- 刊出日期: 2018-08-01

STUDY OF DISASTER-INDUCING GEOLOGICAL CONDITIONS OF COLLAPSE AND LANDSLIDE ALONG LULANG-TONGMAI IN SE TIBET

ZHANG Jiajia^{1, 2
,},
CHEN Long^{1, 2},
WANG Junchao^{1, 2
, ,},
LI Yuanling^{1, 2},
GAO Bo^{1, 2},
SHI Shengwei^{1, 2}

1.
Institute of Exploration Technology, CAGS, Chengdu 611734, Sichuan, China
2.
Technical center for geological hazard prevention and control, CGS, Chengdu 611734, Sichuan, China

摘要

摘要: 藏东南的喜马拉雅东构造结地区作为青藏高原隆升最快的地区之一，其复杂的地质背景条件决定了该区工程地质问题具有复杂性和特殊性，并孕育了多种地质灾害。利用测窗、节理裂隙分期配套等野外调查方法以及遥感影像解译，分析总结了藏东南地区鲁朗至通麦不同区段崩塌滑坡地质灾害的孕灾地质背景，据此将研究区划分为四段，分别为鲁朗-东久段、东久-拉月段、拉月-排龙段、排龙-通麦段，每一区段分别对应了不同的孕灾地质条件特征，由此也决定了区段内崩滑地质灾害的性质、变形破坏模式、规模。相关成果可用于藏东南崩塌滑坡地质灾害的早期识别和风险评价。
- 孕灾地质条件 /
- 崩塌滑坡 /
- 喜马拉雅东构造结 /
- 藏东南
Abstract: Eastern Himalayan Syntaxis, as one of the fastest uplifting region in Tibetan Plateau, its complex geological environment determines that the engineering geological problems have complexity and particularity and give birth to a variety of geo-hazards. Based on the survey results of the project "Geo-hazards investigation in main towns and major highways in SE Tibet", the geological conditions of landslides along Lulang-Tongmai were analyzed. According to the analysis, the study area could be divided into four sections, respectively, which are Lulang-Dongjiu section, Dongjiu-Layue section, Layue-Pailong section, Pailong-Tongmai section. Each section corresponds to different disaster-inducing geological conditions, which determines the nature, deformation and failure mode and scale of landslide in the section. The conclusion could be used in risk assessment and early identification of landslides in SE Tibet.
- disaster-inducing geological conditions /
- landslide /
- eastern Himalayan syntaxis /
- SE Tibet

HTML全文

图 1 喜马拉雅东构造结区域地质、历史地震图^[4]

Ⅰ—拉萨地体；Ⅱ—雅鲁藏布江缝合带；Ⅲ—喜马拉雅东构造结；1—念青唐古拉变质岩系；2—冈底斯花岗岩带；3—古生代岩石；4—雅鲁藏布江蛇绿混杂岩带；5—直白组高压麻粒相带；6—派乡组角闪岩相变质岩；7—多雄拉组混合岩化角闪岩相变质岩；8—拆离断裂；9—逆冲断裂；10—左行走滑断裂；11—右行走滑断裂；12—面理产状；13—里氏6.0~7.0级地震；14—大于里氏7.0级地震；15—11.18米林6.9级地震震中

Figure 1. Regional geology and historical earthquake distribution of Eastern Himalayan Syntaxis^[4]

下载: 全尺寸图片幻灯片

图 2 鲁朗—东久—通麦研究区地质简图

F1—鲁朗—东久左行走滑剪切带；F2—东久—排龙韧性逆冲剪切带；F3—通灯—通麦左行走滑断裂；P1—鲁朗—东久灾害地质剖面；P2—东久—拉月灾害地质剖面；P3—拉月—排龙灾害地质剖面；P4—排龙—通麦灾害地质剖面

Figure 2. Simplified geologic map of Lulang-Dongjiu-Tongmai area

下载: 全尺寸图片幻灯片

图 3 鲁朗—东久灾害地质剖面图(P1)

Figure 3. Profile of geo-hazards in Lulang-Dongjiu section

下载: 全尺寸图片幻灯片

图 4 鲁朗—东久段主要地质灾害

a-鲁朗河西侧边坡表层溜滑; b-鲁朗河东侧河流切坡诱发形成的土质滑坡

Figure 4. Major geo-hazards in Lulang-Dongjiu section

下载: 全尺寸图片幻灯片

图 5 东久—拉月段典型斜坡结构及节理特征图

a-东久-拉月段野外典型斜坡结构; b-东久-拉月段边坡节理赤平投影（红色线条为斜坡投影$ 黑色线条为节理投影）

Figure 5. Typical ramp structure and joint stereographic projection in Dongjiu-Layue section

下载: 全尺寸图片幻灯片

图 6 东久—拉月灾害地质剖面图(P2)

Figure 6. Profile of geo-hazards in Dongjiu-Layue section

下载: 全尺寸图片幻灯片

图 7 拉月—排龙段典型斜坡结构及节理特征图

a-拉月-排龙段野外典型斜坡结构; b-拉月-排龙边坡节理赤平投影（红色线条为斜坡投影$ 黑色线条为节理投影）

Figure 7. Typical ramp structure and joint stereographic projection in Layue-Pailong section

下载: 全尺寸图片幻灯片

图 8 拉月—排龙灾害地质剖面图(P3)

Figure 8. Profile of geo-hazards in Layue-Pailong section

下载: 全尺寸图片幻灯片

图 9 排龙—通麦段典型斜坡结构及节理特征图

a-排龙-通麦段野外典型斜坡结构; b-排龙-通麦边坡节理赤平投影（红色线条为斜坡投影$ 黑色线条为结构面投影）

Figure 9. Typical ramp structure and joint stereographic projection in Layue-Tongmai section

下载: 全尺寸图片幻灯片

图 10 排龙—通麦灾害地质剖面图(P4)

Figure 10. Profile of geo-hazards in Pailong-Tongmai section

下载: 全尺寸图片幻灯片

表 1 鲁朗—通麦崩滑地质灾害类型、孕灾地质条件对比

Table 1. Contrastive analysis of the geologic conditions and disaster-inducing features along Lulang-Tongmai

区段名称	崩滑灾害类型及规模	岩性组合	斜坡结构	变形破坏模式
鲁朗—东久段	小型土质滑坡	高陡边坡坡脚的坡积物	类均质土质斜坡	蠕滑—拉裂式
东久—拉月段	小型崩塌	节理裂隙发育的块状变质岩	类反向坡	倾倒、拉裂式
拉月—排龙段	大型—特大型岩质滑坡	节理裂隙发育的块状变质岩	类顺向坡	滑移—拉裂式
排龙—通麦段	小—中型崩塌	节理裂隙发育的块状变质岩	类横向坡	倾倒、拉裂式

下载: 导出CSV

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