近水平厚层高陡斜坡崩塌机制研究

冯振; 李滨; 贺凯

近水平厚层高陡斜坡崩塌机制研究

冯振^{1, 2,},
李滨^{1, 2},
贺凯³

1.
中国地质科学院地质力学研究所, 北京 100081
2.
国土资源部新构造运动与地质灾害重点实验室, 北京 100081
3.
长安大学地质工程与测绘学院, 西安 710054

基金项目:

国家自然科学基金项目 41302246

中国地质科学院地质力学研究所基本科研业务费项目 DZLXJK201307

国家科技支撑课题 2012BAK10B01

地质调查项目 1212011220140

详细信息

作者简介:
冯振（1985-），男，博士，助理研究员，主要从事地质灾害等方面的研究工作。E-mail：fengzhencgs@126.com

中图分类号: P642.21
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- 被引次数: 0
出版历程
- 收稿日期: 2014-02-12
- 刊出日期: 2014-06-01

ROCK COLLAPSE MECHANISM ON HIGH-STEEP SLOPE FAILURE IN SUB-HORIZONTAL THICK-BEDDED MOUNTAINS

FENG Zhen^{1, 2
,},
LI Bin^{1, 2},
HE Kai³

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key laboratory of Neotectonic and Goehazard, Ministry of Land and Resources, Beijing 100081, China
3.
School of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China

摘要

摘要: 近水平厚层高陡斜坡岩层倾角小于10°，具有软硬相间或上硬下软的结构，常形成高陡斜坡或陡崖地形，主要以大型崩塌的形式发生破坏。在梳理国内外文献的基础上，从岩体破坏机制出发，对近水平厚层高陡斜坡崩塌的形成过程、破坏机制、失稳模式进行分析，总结归纳了6种地质力学模型，包括滑移-拉裂、塑流-拉裂、倾倒-拉裂、剪切-错断、剪切-滑移、劈裂-溃屈，并提出了相应的野外识别特征。
- 近水平层状山体 /
- 陡倾构造节理裂隙 /
- 岩体破坏机制 /
- 失稳模式 /
- 地质力学模型
Abstract: Sub-horizontal thick bedding slope shows a gentle dip of approximately 0~10°and strata structure of hard on soft, or hard interbedded with soft. It forms a high and steep terrain and is prone to rock collapse. Reviewing a lot of references, failure process and initiation mechanism, as well as failure modes of high-steep slope in sub-horizontal thick bedding mountains are analyzed in terms of rock mass failure mechanism. Six geomechanic models are summarized such as slipe-tensile, creep-tensile, slipe-shear, shear-rupture, shear-slipe and split-bulk. Corresponding to the reconginition features of geological structure are also presented.
- sub-horizontal bedding slope /
- vertical tectonic joints /
- failure mechanism of rock mass /
- failure mode /
- geomechanic model

HTML全文

图 1 滑移-拉裂式崩塌模式（据文献[8]修改）

Figure 1. Creep-tensile failure mode

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图 2 近水平厚层高陡山体塑流-拉裂破坏的地貌学演化过程^[20]

Figure 2. Morphoevoltionary model of creep-tensile failure of sub-horizonatal thick bedding mountains

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图 3 望霞危岩的旋转剪切

Figure 3. Rotational failure of Wangxia cliff

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图 4 易于发生倾倒-拉裂的红砂岩塔状危岩

Figure 4. Sandstone tower prone to toppling

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图 5 Katoomba崩塌现场

Figure 5. Failure at Katoomba

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图 6 Katoomba剪切-错断式崩塌剖面图^[22]

Figure 6. Shear-rupture failure in Katoomba escarpment

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图 7 近水平厚层高陡斜坡平面滑移破坏^[28]

Figure 7. Translational slide from shear-slide failure of rockmass

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图 8 滑移-剪切破坏示意图^[27]

Figure 8. Schematic model for slipe-shear failure

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图 9 甑子岩危岩正视图（镜像45°）

Figure 9. Front view of Zengzi Cliff

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图 10 甑子岩危岩崩塌剖面图

Figure 10. Profile view of Zengzi Cliff collapse

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