scholarly journals New Slip Circle Method for Analysis of Slope Stability and Bearing Capacity

2002 ◽  
Vol 42 (2) ◽  
pp. 139-152 ◽  
Keyword(s):  
Slope Stability ◽  
Bearing Capacity ◽  
Circle Method

Slope stability and bearing capacity of landfills and simple on-site test methods

2017 ◽  
Vol 35 (7) ◽  
pp. 730-738 ◽  
Author(s):  
Atsushi Yamawaki ◽  
Yoichi Doi ◽  
Kiyoshi Omine
Keyword(s):  
Slope Stability ◽  
Bearing Capacity ◽  
Test Methods ◽  
Site Test

Effect of soil variability on the bearing capacity of clay and in slope stability problems

2009 ◽  
Vol 108 (1-2) ◽  
pp. 142-152 ◽  
Author(s):  
Amit Srivastava ◽  
G.L. Sivakumar Babu
Keyword(s):  
Slope Stability ◽  
Bearing Capacity ◽  
Soil Variability ◽  
Stability Problems

Influence of Fouling and Water Content of Ballast on Railway Substructure Bearing Capacity

2017 ◽  
Author(s):  
A. K. Rohrman ◽  
H. F. Kashani ◽  
C. L. Ho
Keyword(s):  
Slope Stability ◽  
Bearing Capacity ◽  
Water Content ◽  
Strength Properties ◽  
Triaxial Tests ◽  
Repeated Loading ◽  
Layered System ◽  
Modes Of Failure ◽  
Track System ◽  
Track Substructure

The performance of ballasted railway systems is commonly compromised by the infiltration of fine material into the voids of the ballast. This sand and finer grained materials in the ballast is known as fouling. Increased fouling can cause decreases in hydraulic conductivity and shear strength of the ballast, as well as reduce stiffness and resilient modulus of the overall track system. These problems can cause gradual deterioration of the track, which could eventually require maintenance. One of the largest source of fouling comes from ballast breakdown resulting from abrasion caused under repeated loading. This study aims to investigate the effects of fouling from ballast breakdown on the bearing capacity of the substructure that supports the rail superstructure. Previous investigations at the University of Massachusetts Amherst utilized large scale 10-inch (25.4 cm) diameter triaxial tests on granitic ballast with fouling from ballast breakdown. The tests were run with fouling contents of 0% (clean ballast), 15%, and 30% and at water contents varying from dry ballast to field capacity. Confining pressures of 5 psi (34.5 kPa), 10 psi (68.9 kPa) and 15 psi (103.4 kPa) were used in this series of tests. Using the results from these tests, the Mohr-Coulomb strength properties can be determined for each case. This study will make use of the strength properties obtained from the results of these tests and apply them using two commonly used bearing capacity analyses. The first model is the Meyerhof and Hanna Method which considers the track as a continuous footing over a layered system. This model considers two modes of failure; punching of an individual sleeper, and track system bearing. The second model applied is the slope stability method, which uses a two-dimensional limit equilibrium approach and the method of slices to determine a factor of safety against slope stability. This analysis is commonly performed using various software programs. In this study, SLOPE/W from the GeoStudio software package is utilized for analysis. The factors of safety resulting from the bearing capacity analysis using these two methods will be compared for each of the test configurations performed, which will help to confirm the results of the analyses. Since the Mohr-Coulomb strength properties change with the degree of fouling and the water content of the ballast, it is expected that this will have some effect on the bearing capacity of the track substructure. The results of these analyses showing the effects of water content and fouling of ballast on overall track substructure bearing capacity are presented in this paper.

scholarly journals Fracture Analysis of Rocks for Slope Stability Assessment in SiriKot Area, District Haripur, Khyber Pakhtunkhwa, Pakistan

2020 ◽  
Vol 11 (3) ◽  
pp. 53-56
Author(s):  
Sajjad Ahmad Shah, Anwar Qadir
Keyword(s):  
Slope Stability ◽  
Hydraulic Properties ◽  
Failure Mechanisms ◽  
Circle Method ◽  
Fracture Analysis ◽  
Geological Strength Index ◽  
Stability Assessment ◽  
Strength Index ◽  
Porosity And Permeability ◽  
Flow Through

The landslides are common and hazardous the Northern Gandghar Ranges, Pakistan. The slope failures have affected road sections between Ghazi to Sari area (~65 Km) along the Sirikot road in district Haripur, Pakistan. The objectives consist of failure mechanisms, slope sensitivity and remedial measures in potentially unstable. To analyze slope stability and understand failure mechanisms, Inventory Circle Method (ICM) has been employed at six locations. Most of the landslides have been found in the Precambrian metamorphic Manki Formation, consisting of slate, phyllite and schists. The data acquired through ICM technique have been used to measure the density of fractures and hydraulic properties (porosity and permeability). The fracture analysis revealed two episodes of deformation. Rose and pole diagrams were plotted for stress analysis and fracture orientation to determine the direction of principal stress σ1. Geological Strength Index (GSI) also provided details about the interlocking pattern of the rocks. Topple and rock fall were found in the limestone and quartzite. Moreover, the fractures also provided channels for the water to flow through and penetrate the foliation planes, decreasing the friction and causing a landslide.

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