Failure mechanism of gently inclined bedding slope under hydraulic driving: The case of the Jiangyuan landslide along Heda Highway

Abstract

The case of the Jiangyuan landslide along Heda Highway is discussed on the basis of the engineering geological conditions of slopes and the effect of hydraulic action on slope stability. From the analyzed characteristics of hydraulic pressure on slopes, groundwater pressure is found to include three aspects: hydrostatic pressure in the posterior border cracks caused by tension, uplift force on potential sliding surface, and dynamic water pressure. Then, the mechanical model of the slope under hydraulic driving and the formula to calculate critical water height for tension fractures are developed. Subsequently, the failure mechanism of the Jiangyuan landslide along Heda Highway is analyzed. Results show that the potential sliding surface of the landslide is gently inclined and interfaced between the overlying conglomerate and underlying weathered mudstone. The sliding tendency of the slope is aggravated by the reduced anti-sliding force of tension fractures in the posterior border, the gently inclined rock interfaces connected by rainfall-induced hydraulic driving, and the excavation of the constructed highway.

Keywords

Hydraulic driving gently inclined bedding mechanical model groundwater failure mechanism

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References

Terzaghi

, Mechanism of landslide in paiges, Application of Geology to Engineering Practice, Geol.Soc. of America. 83–123 New York, 1950.

Goodman

R.E.

and Kieffer

D.S.

, Behavior of rock in slopes, Journal of Geotechnical & Geo-environmental Engineering 126(8) (2000), 675–684.

Bhasin

Grimstad

Larsen

J.O.

et al., Landslide hazards and mitigation measures at Gangtok, Sikkim Himalaya, Engineering Geology 64(4) (2002), 351–368.

Sitar

Maclaughlin

M.M.

and Doolin

D.M.

, Influence of kinematics on landslide mobility and failure mode, Journal of Geotechnical & Geo-environmental Engineering 131(6) (2005), 716–728.

Bonzanigo

Oppizzi

Tornaghi

et al., Hydrodynamics and rheology: key factors in mechanisms of large landslides, Springer-Verlag, New York 73(5) (2006), 69–107.

Severin

Eberhardt

Leoni

et al., Use of ground-based synthetic aperture radar to investigate the complex 3-D kinematics of a large open pit slope, Bulletin of the School of Oriental & African Studies 7(4) (2011), 799–808.

Hatanaka

Mitani

Okeke

et al., Investigation and Mechanism Clarification of the 2011.1.5 Atom-en Landslide in Kashima Area, Matsue City. Landslides in Cold Regions in the Context of Climate Change. Springer International Publishing, 2014, 53–70.

Hungr

Leroueil

and Picarelli

, The varnes classification of landslide types, an update, Landslides 11(2) (2014), 167–194.

Khositashvili

G.R.

, Classification as the basic tool of landslide study – classification process Engineering geology for society and territory, Springer International Publishing 2 (2015), 935–939.

10.

Booth

A.M.

Dehls

Eiken

et al., Integrating diverse geologic and geodetic observations to determine failure mechanisms and deformation rates across a large bedrock landslide complex: the Osmundneset landslide, Sogn og Fjordane, Norway, Landslides 12(4) (2015), 745–756.

11.

Sun

and Yao

, Study on Geological Disasters of Landslides in China. Typical Landslides in China. 1986.

12.

Feng

, A study on mechanism and countermeasures of deformation and failure of stratified side slops with gently inclined bedding, Highway (6) (2005), 90–96.

13.

Jian

Yin

Yan

et al., Characteristics and formation mechanism of minguochang landslide in Wanzhou District, Chongqing, The Chinese Journal of Geological Hazard and Control 16(4) (2005), 20–23.

14.

Liu

Cao

et al., analysis of bedding-slip failure mechanism of rock slope due to hydraulic drive, Chinese Journal of Rock Mechanics and Engineering 24(19) (2005), 3529–3533.

15.

Fan

Zhang

et al., Study on genetic mechanism of translational landslide, Chinese Journal of Rock Mechanics and Engineering 27(supp.2) (2008), 3753–3759.

16.

Huang

, Mechanism and geo-mechanical models of landslide hazards triggered by wenchuan 8.0 earthquake, Chinese Journal of Rock Mechanics and Engineering 28(6) (2009), 1239–1249.

17.

Feng

Jiao

et al., Analysis of sliding mechanism of accumulation horizon landslide under railfall condition, Rock and Soil Mechanics 31(supp.1) (2010), 324–329.

18.

et al., Analysis of deformation and failure mechanism of shuping landslide in three gorges reservoir area, Rock and Soil Mechanics 35(4) (2014), 1123–1130.

19.

Zhang

Yin

et al., Study of mechanism of landslide induced by rainfall in gently inclined red stratum in east sichuan basin, Chinese Journal of Rock Mechanics and Engineering 22(supp.2) (2014), 3783–3790.

20.

Xia

Chen

Liu

et al., Analysis of sliding failure mechanism of gently inclined bedding compoune rock mass slope under hyduaulic pressure, Chinese Journal of Rock Mechanics and Engineering 22(supp.2) (2014), 3766–3775.