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A New Approach Based on Strain Sensitivity for Reinforcement Optimization in Slope Stability Problems

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The shape of the reinforcement for stabilizing slopes in geotechnical application is usually based on empirical methods, and is often in the shape of a grouted curtain to cover the slope surface to increase the shear strength. The reinforcement optimization is an important measure to achieve the most stable shape with the determined amount of materials. This paper aims at exploring the state-of-the-art design of reinforcement to approach stability in the slope using minimum amount of the reinforcement. In this research, enhancement in the bi-directional evolutionary structural optimization method has been made to optimize the reinforced layers in slope stabilization design. Through an iterative approach, the stability of slope is increased by addition of reinforced material to minimize total deformation. A new analytical technique for the slope reinforcement optimization has been introduced based on strain sensitivity analysis. The obtained results show a reasonable resemblance to the practical slope reinforcement solutions. The process of optimization requires the finite element analysis to assess elements respond which is carried out by finite element package ABAQUS in this research.
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ORIGINAL PAPER
A New Approach Based on Strain Sensitivity
for Reinforcement Optimization in Slope Stability Problems
M. Yazdanpanah .G. Ren .Y. M. Xie .M. Wasim
Received: 16 July 2015 / Accepted: 12 January 2016 / Published online: 25 January 2016
ÓSpringer International Publishing Switzerland 2016
Abstract The shape of the reinforcement for stabi-
lizing slopes in geotechnical application is usually
based on empirical methods, and is often in the shape
of a grouted curtain to cover the slope surface to
increase the shear strength. The reinforcement opti-
mization is an important measure to achieve the most
stable shape with the determined amount of materials.
This paper aims at exploring the state-of-the-art design
of reinforcement to approach stability in the slope
using minimum amount of the reinforcement. In this
research, enhancement in the bi-directional evolution-
ary structural optimization method has been made to
optimize the reinforced layers in slope stabilization
design. Through an iterative approach, the stability of
slope is increased by addition of reinforced material to
minimize total deformation. A new analytical tech-
nique for the slope reinforcement optimization has
been introduced based on strain sensitivity analysis.
The obtained results show a reasonable resemblance to
the practical slope reinforcement solutions. The pro-
cess of optimization requires the finite element
analysis to assess elements respond which is carried
out by finite element package ABAQUS in this
research.
Keywords Bi-directional evolutionary structural
optimization (BESO) Sensitivity analysis
Reinforcement Slope stability
1 Introduction
Slope stability analysis is considered as one of the
most important areas of geotechnics. The designation
of shape and reinforcement to overcome stability
issues requires empirical methods and experienced
geotechnical engineers (Das 2011). Reinforcement,
through transferring loads and integrating the rock
masses increases the stability in geotechnical prob-
lems (Brady and Brown 1985). As a useful tool in
finding optimum reinforcement material distribution,
topology optimization techniques can also be used in
finding the pattern of reinforcement to stabilize slopes.
The first proposed optimization method applied
homogenisation technique; in which firstly, the micro-
scopic properties were evaluated and then, the macro-
scopic properties of the structure were estimated
through homogenisation theory. The whole procedure
was done through iterations to obtain the optimum
M. Yazdanpanah (&)G. Ren Y. M. Xie M. Wasim
School of Civil, Environmental and Chemical
Engineering, RMIT University,
GPO Box 2476V, Melbourne 3001, Australia
e-mail: s3349616@student.rmit.edu.au
G. Ren
e-mail: gang.ren@rmit.edu.au
Y. M. Xie
e-mail: mike.xie@rmit.edu.au
M. Wasim
e-mail: s3442859@student.rmit.edu.au
123
Geotech Geol Eng (2016) 34:713–724
DOI 10.1007/s10706-016-9982-0
Content courtesy of Springer Nature, terms of use apply. Rights reserved.
... As the most common problem in engineering, landslides have seriously affected traffic safety and people's lives (Hassiotis et al. 1997;Guo and Qin 2010;Yazdanpanah et al. 2016). Therefore, experienced geotechnical engineers try to provide a reasonable design and reinforcement to overcome stability problems (Ito et al. 1981;Poulos 1995). ...
... Many measures have been put forward in the study of landslide prevention and control. Antislide piles are widely applied as an important structure to prevent landslides and in slope engineering generally (Popov and Okatov 1980;Poulos 1995;Yazdanpanah et al. 2016). However, the calculation method for anti-slide piles still has some limitations. ...
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