STUDY ON CONTROL MEASURES OF COUNTER-TILT ROCK LANDSLIDE IN THREE GORGES RESERVOIR REGION

TAN Weijia; DAI Zhenwei; CHEN Yunxia

Volume 23 Issue 1

Feb. 2017

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TAN Weijia, DAI Zhenwei, CHEN Yunxia, et al., 2017. STUDY ON CONTROL MEASURES OF COUNTER-TILT ROCK LANDSLIDE IN THREE GORGES RESERVOIR REGION. Journal of Geomechanics, 23 (1): 78-87.

Citation:

TAN Weijia, DAI Zhenwei, CHEN Yunxia, et al., 2017. STUDY ON CONTROL MEASURES OF COUNTER-TILT ROCK LANDSLIDE IN THREE GORGES RESERVOIR REGION. Journal of Geomechanics, 23 (1): 78-87.

Citation:

TAN Weijia, DAI Zhenwei, CHEN Yunxia, et al., 2017. STUDY ON CONTROL MEASURES OF COUNTER-TILT ROCK LANDSLIDE IN THREE GORGES RESERVOIR REGION. Journal of Geomechanics, 23 (1): 78-87.

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STUDY ON CONTROL MEASURES OF COUNTER-TILT ROCK LANDSLIDE IN THREE GORGES RESERVOIR REGION

1.
School of Geology Engineering and Geomatics, Chang'an University, Xi'an, Shaanxi 710054, China
3.
Wuhan Centre of China Geological Survey, China Geological Survey, Wuhan, Hubei 430205, China

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Received: 2016-06-30
Published: 2017-02-28

Abstract

Abstract

In this paper, Maocaopo in the Wu Gorge section, a typical anti-dip rock landslide, was taken as the research object to describe the phased design process of prevention and control measures for this type of landslide (principle, idea and method):First, the deformation failure process and the current deformation stage of the bank slope were analyzed on the basis of existing geological survey data and the characteristics of bank slope deformation failure at the current stage, so as to determine the corresponding instability mode and main control factors, then propose alternative schemes for landslide prevention and control. Second, different deformation failure stages of the landslide were reasonably divided. Numerical simulation was applied to carry out whole-process evaluation of the outcome of each alternative scheme for landslide prevention and control at different deformation failure stages of the bank slope. Reasonable prevention and control measures were established through comparative analysis. Main conclusions of the research include the followings:(1) For the same bank slopes, their deformation failure mode and main control factors are not exactly the same at different deformation stages, and the same prevention and control scheme renders significantly different outcomes. (2) For the current stage of Maocaopo, the landslide is at the slope toe weakening and slipping stage of the deformation failure process. The main control factor of deformation failure at this stage is the weakening and slipping of rock mass in the hydro-fluctuation belt. The scheme of slope protection with lattice needs a lower construction cost and produces a better prevention and control effect, while the scheme of bolt anchoring needs a higher construction cost but has a poorer effect.
- Three Gorges Reservoir Region,
- counter-tilt rock landslide,
- Maocaopo bank slope,
- deformation mode,
- control measures

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References(17)

References

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