Unsaturated seepage–stress–damage coupling and dynamic analysis of stability on discrete fractured rock slope

2021 ◽  
Vol 80 (18) ◽  
Author(s):  
Shu-hong Wang ◽  
Tian-jiao Yang ◽  
Ze Zhang ◽  
Zi-han Sun
Keyword(s):  
Dynamic Analysis ◽  
Rock Slope ◽  
Fractured Rock ◽  
Analysis Of Stability ◽  
Stress Damage ◽  
Unsaturated Seepage

Safety Analysis of Static & Dynamic Method in Foundation Pit Considering Unsaturated Seepage

2013 ◽  
Vol 444-445 ◽  
pp. 946-950
Author(s):  
Yi Hong Zhou ◽  
Xiu Wen Li ◽  
Yun Feng Peng ◽  
Ting Zhang
Keyword(s):  
Slope Stability ◽  
Dynamic Analysis ◽  
Unsaturated Zone ◽  
Dynamic Method ◽  
Soil Consolidation ◽  
Main Study ◽  
Dynamic Boundary Conditions ◽  
Foundation Pit ◽  
Consolidation Settlement ◽  
Unsaturated Seepage

In order to study whether foundation pit is stable or not after excavation, the article adopted the Duncan E-B model to make static analysis for the excavation scheme which considering the soil consolidation settlement and to make dynamic analysis under the action of earthquake wave of EL Centro. To make a slope stability of foundation pit analysis by calculating static and dynamic boundary conditions which further coupled with the Newmark method. The main study is the foundation settlement and earth-rock dams, slope stability of foundation pit conditions that considering unsaturated zone seepage conditions of earth-rock dams after the excavation. The results indicated that: in the static & dynamic analysis, the distribution about settlement is reasonable, earth-rock dam and foundation pit slope is in the steady state, the excavation scheme is reasonable and feasible.

scholarly journals Unstable rock slope hydrogeology: insights from the large-scale study of western Argentera-Mercantour hillslopes (South-East France)

2007 ◽  
Vol 178 (2) ◽  
pp. 159-168 ◽  
Author(s):  
Stéphane Binet ◽  
Yves Guglielmi ◽  
Catherine Bertrandet ◽  
Jacques Mudry
Keyword(s):  
Flow Velocity ◽  
Large Scale ◽  
Rock Slope ◽  
Fractured Rock ◽  
Gravitational Instabilities ◽  
Large Landslide ◽  
Hydrogeological Mapping ◽  
Lower Variation ◽  
Natural Spring

Abstract Inventory of unstable hillslopes, hydrogeological mapping and hydrochemical characteristics of natural spring waters were used to determine the long-term relationships between groundwater and gravitational instabilities in the Upper Tinée Valley (South-East French Alps). Water chemistry and flow records allow to propose a conceptual model of water flow within unstable rocky slopes and to back-calculate the volume of infiltrated water and the flow velocity in the aquifers for different deformation states of the slopes. An increase in infiltrated yield, flow velocity and porosity is observed and linked to collapsed and toppled structures in the upper parts of the hillslopes. In these areas, perched aquifers take place in the reworked media. When a large landslide occurs, it modifies the geometry of the slope and bypasses the perched flows down to the foot of the slope. With long-term continuous slope deformation, the associated effect between water flows and slope destabilization changes. In the fractured rock, the coupled effect corresponds to rising water pressures with limited volumes of infiltrated water; in the more fractured and permeable collapsed and toppled areas, the volumes of infiltrated water increase with a lower variation of water pressures.

scholarly journals GEOTECHNICAL INVESTIGATION OF THE ROCK SLOPE STABILITY PROBLEMS OCCURRED AT THE FOUNDATIONS OF THE COASTAL BYZANTINE WALL OF KAVALA CITY, GREECE

2017 ◽  
Vol 43 (3) ◽  
pp. 1230 ◽  
Author(s):  
C. Loupasakis ◽  
N. Spanou ◽  
D. Kanaris ◽  
D. Exioglou ◽  
A. Georgakopoulos
Keyword(s):  
Rock Mass ◽  
Rock Slope ◽  
Fractured Rock ◽  
Rock Slope Stability ◽  
Normal Faults ◽  
Sea Waves ◽  
Coast Line ◽  
Support Measures ◽  
Wave Erosion ◽  
Very High

The coastal Byzantine wall of Kavala is located at the Panagia peninsula and it is founded on the Simvolou granite. The granite rock mass appears to be fractured by joint sets with very high persistence (>20m) and very wide spacing (60cm – 2m), forming large rock blocks. Further more, the Panagia peninsula is intersected by numerous parallel normal faults, forming extended zones of intensively fractured rock mass. Along the coastline the granite appear to be eroded by the sea waves, forming small gulfs around the faults. The Byzantine wall is founded along the edge of the fractured slopes forming the coast line of the peninsula, arising issues about the safety of the historical construction. The joint sets form numerous rock wedges with unfavourable orientation, many sections of the slopes are undercut by the wave erosion and in the majority of the fault zones the rock mass presents intensive fragmentation. The above described condition of the rock mass was recorded in detail along the entire coast line and all unstable sections were located. A full set of support measures was proposed for all unfavourable sections aiming to the improvement of the geotechnical behaviour of the rock mass, constituting the foundation formation of the Byzantine wall.

Research of Slope Stability Analysis Considering Rainfall Infiltration

2012 ◽  
Vol 204-208 ◽  
pp. 487-491
Author(s):  
Jian Hua Liu ◽  
Zhi Min Chen ◽  
Wei He
Keyword(s):  
Slope Stability ◽  
Pore Water ◽  
Rock Slope ◽  
Rainfall Intensity ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Rainfall Infiltration ◽  
Safety Coefficient ◽  
Rainfall Duration ◽  
Unsaturated Seepage

Based on the saturated-unsaturated seepage theory and considering soil-hydraulic permeability coefficient characteristic curves of rock slope, the variation of suction in unsaturated region and transient saturated zone formation of rock slope were analyzed. Combined with engineering example, the strength reduction methods were adopted to analyzing the rock slope stability influence factors considering unsaturated seepage with different rainfall intensity and duration. The results show that the flow domain owing to rainfall infiltration mainly appears surface layer region of slope. The rainfall infiltration caused the groundwater level rise, the rising of transient pore water pressure and the fall of suction in unsaturated region caused the slope stability decrease. The rainfall intensity and duration have obvious influence on slope stability, and in the same rainfall duration condition, the safety coefficient of slope decreases with the accretion of rainfall intensity. With the rainfall duration increasing, the water in soil has more deep infiltration, the water content and pore water pressure was higher in the same high position, the decreasing of suction caused the safety coefficient of slope has more reduce.

Deep-seated failure propagation in a fractured rock slope over 10,000 years: The La Clapière slope, the south-eastern French Alps

Geomorphology ◽  
2009 ◽  
Vol 105 (3-4) ◽  
pp. 232-238 ◽  
Author(s):  
Samyr El Bedoui ◽  
Yves Guglielmi ◽  
Thomas Lebourg ◽  
Jean-Louis Pérez
Keyword(s):  
Rock Slope ◽  
Fractured Rock ◽  
The South ◽  
French Alps ◽  
South Eastern ◽  
Failure Propagation
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