Home | ENGINEERING | Slope Stability: Introduction

Civil - Soil Mechanics -Slope Stability

Slope Stability: Introduction

   Posted On :  11.07.2016 11:08 pm
Slope Stability: Introduction

Gravitational and seepage forces tend to cause instability in natural slopes, in slopes formed by excavation and in the slopes of embankments.


SLOPE STABILITY

INTRODUCTION

 

Gravitational and seepage forces tend to cause instability in natural slopes, in slopes formed by excavation and in the slopes of embankments. The most important types of slope failure are illustrated in Figure. In rotational slips the shape of the failure surface in section may be a circular arc or a non-circular curve. In general, circular slips are associated with homogeneous, isotropic soil conditions and non-circular slips with non-homogeneous conditions. Translational and compound slips occur where the form of the failure surface is influenced by the presence of an adjacent stratum of significantly different strength, most of the failure surface being likely to pass through the stratum of lower shear strength. The form of the surface would also be influenced by the presence of discontinuities such as fissures and pre-existing slips. Translational slips tend to occur where the adjacent stratum is at a relatively shallow depth below the surface of the slope, the failure surface tending to be plane and roughly parallel to the slope. Compound slips usually occur where the adjacent stratum is at greater depth, the failure surface consisting of curved and plane sections. In most cases, slope stability can be considered as a two-dimensional problem, conditions of plane strain being assumed.

Design resisting moment. Characteristic values of shear strength parameters cí and tan ?should be divided by factors 1.60 and 1.25, respectively. (However, the value of cí is zero if the critical-state strength is used.) The characteristic value of parameter cu should be divided by 1.40. A factor of unity is appropriate for the self-weight of the soil and for pore water pressures. However, variable loads on the soil surface adjacent to the slope should be multiplied by a factor of 1.30.

 

The following limit states should be considered as appropriate:

 

1         Loss of overall stability due to slip failure.

 

2         Bearing resistance failure below embankments.

 

3         Internal erosion due to high hydraulic gradients and/or poor compaction.

 

4         Failure as a result of surface erosion.

 

5         Failure due to hydraulic uplift.

 

Excessive soil deformation resulting in structural damage to, or loss of service- ability of, adjacent structures, highways or services.


Tags : Civil - Soil Mechanics -Slope Stability
Last 30 days 30 views
Related words :

What is Slope Stability: Introduction Define Slope Stability: Introduction Definition of Slope Stability: Introduction where how meaning of Slope Stability: Introduction lecturing notes for Slope Stability: Introduction lecture notes question and answer for Slope Stability: Introduction answer Slope Stability: Introduction study material Slope Stability: Introduction assignment Slope Stability: Introduction reference description of Slope Stability: Introduction explanation of Slope Stability: Introduction brief detail of Slope Stability: Introduction easy explanation solution Slope Stability: Introduction wiki Slope Stability: Introduction wikipedia how why is who were when is when did where did Slope Stability: Introduction list of Slope Stability: Introduction school assignment college assignment Slope Stability: Introduction college notes school notes kids with diagram or figure or image difference between Slope Stability: Introduction www.readorrefer.in - Read Or Refer

​TOP MENU

OTHER SUGEST TOPIC

Recent New Topics :