scholarly journals A Study on the Characteristics of Behavior of Block-type Reinforced Earth Retaining Wall Considering Failure Surface

2016 ◽  
Vol 15 (3) ◽  
pp. 13-26
Author(s):  
Won-Sub Yoon ◽  
Jun-Kyu Park ◽  
Young-Su Chae
Keyword(s):  
Retaining Wall ◽  
Failure Surface ◽  
Block Type ◽  
Reinforced Earth

scholarly journals Development of Design Program for Block-type Reinforced Earth Retaining Wall

2014 ◽  
Vol 56 (6) ◽  
pp. 75-84
Author(s):  
Chung-Won Lee ◽  
Ji-Hoon Yoo ◽  
Yeon-Sik Min ◽  
Dong-Su Chang ◽  
Hyun-Taek Lim ◽  
...  
Keyword(s):  
Retaining Wall ◽  
Block Type ◽  
Design Program ◽  
Reinforced Earth

Application of FEM Strength Reduction Dynamic Analysis in the Seismic Design of Reinforced Earth-Retaining Wall with Geo-Grid

2014 ◽  
Vol 580-583 ◽  
pp. 1419-1425
Author(s):  
Xiao Song Tang ◽  
Ying Ren Zheng ◽  
Lai Jie
Keyword(s):  
Dynamic Analysis ◽  
Seismic Design ◽  
Retaining Wall ◽  
Failure Surface ◽  
Soil Mass ◽  
Strength Reduction ◽  
Filling Material ◽  
Mesh Structure ◽  
Reinforced Earth ◽  
New Thinking

Due to the special mesh structure, geo-grid material can avoid local subsidence of filling material, reduce uneven settlement of soil mass to the largest degree and improve the whole stability of soil mass, so the reinforced earth-retaining wall with geo-grid is widely used in engineering. Meanwhile, researches on its dynamic characters are not enough and it is hard to judge the whole stability of reinforced earth-retaining wall under seismic condition. When unstable failure happens, the location of failure surface can hardly be identified. These disadvantages have seriously limited the development of this supporting method and cause unsafe potentials for engineering. Based on the FEM strength reduction dynamic analysis and combined with practical engineering, the paper conducts stability analysis on the reinforced earth-retaining wall of geo-grid under seismic condition and the research achievements provide a new thinking for the seismic design of reinforced earth-retaining wall with geo-grid.

Reinforced Earth Retaining Structures - Failure Surface Shape

2017 ◽  
Vol 21 ◽  
pp. 380-388
Author(s):  
Oana Elena Colț
Keyword(s):  
Interaction Mechanism ◽  
Theoretical Method ◽  
Failure Surface ◽  
Point Of View ◽  
Surface Shape ◽  
Design Calculation ◽  
Retaining Structures ◽  
Reinforced Earth ◽  
Tensile Forces ◽  
Earth Retaining Structures

As an alternative to classical retaining solutions, as gravity or flexible retaining walls, the reinforced earth retaining structures are successfully used. The interaction between the reinforcement and the soil fill and their failure mode as well, are important issues to take into account for the design of these types of structures and the corresponding calculation methods used for their design. From this point of view, an important element is the shape of the failure surface, considered in the design calculation as: plane, circular, etc., which has an important influence on the tensile forces values within reinforcements. This paper presents a new theoretical method for the calculations of the reinforced earth retaining structures and the corresponding results for failure surface shape and for tensile forces in the reinforcements. Considering the similarities between the theoretical results presented in this paper and the experimental results presented in the specialty bibliography, this method creates the possibilities to design in a more economical way, only by taking into consideration the correct interaction mechanism between the soil and the reinforcements

On the Active Failure Surface in the Backfilled Clay behind Rigid Retaining Wall in Slope Engineering

2006 ◽  
Vol 306-308 ◽  
pp. 1497-1502
Author(s):  
X.C. Xu ◽  
Yu Yong Jiao
Keyword(s):  
Variational Principle ◽  
Analytic Solution ◽  
Retaining Wall ◽  
Field Tests ◽  
Earth Pressure ◽  
Failure Surface ◽  
Slope Engineering ◽  
Differential Element ◽  
Element Method

In the classical Coulomb’s earth pressure theory, the failure surface in the backfilled clay behind rigid retaining wall in slope engineering is assumed a plane. However, it has been proved by a number of laboratory and field tests that this failure surface is actually a curving surface. In this paper, based on the vertical differential element method and the variational principle, a new analytic solution to determine the actual failure surface in the backfilled clay is derived, and the effects of the backfilled clay’s properties as well as the effects of the retaining wall’s smoothness are discussed. The result obtained from the proposed approach is compared with Coulomb’s earth pressure theory.

The Stability Analysis of Reinforced Earth Retaining Wall System and the Study of its Reinforcement Optimization

2011 ◽  
Vol 90-93 ◽  
pp. 2389-2392
Author(s):  
Hai Yan Ju ◽  
Gui Qing Gao ◽  
Jian Hua Li ◽  
Jiang Qian Zhao ◽  
Zhang Ming Li
Keyword(s):  
Cross Sections ◽  
Design Method ◽  
Retaining Wall ◽  
Physical Behavior ◽  
Reinforced Earth ◽  
Slope Treatment ◽  
The Stability ◽  
Relationship Of ◽  
The Relationship ◽  
System Program

Because the relationship is not considered between physical behavior and cross sections of bars, the conventional reinforced earth retaining wall design based on constant value would lead to some limitations: the haul-resistant coefficient of the top wall is not enough, but it goes beyond at the bottom of retaining wall. In the paper, considering the SARMA method, based on computing formula of traditional slope stability, the detailed programme is realized by the language of FORTRAN, it can make up deficiency that lies in the tradition reinforced earth retaining wall by considering the relationship of physical behavior and cross sections, lengths and layers of bars. Finally, the system program has been applied to a slope treatment project in Guangzhou. Compared with the design method of traditional regulations, it is demonstrated that the optimum length required is obtained, the cross section and length of bars are fully used, and the design is simplified.

Settlement Behavior of New Reinforced Earth Retaining Walls under Loading-Unloading Cycles

2012 ◽  
Vol 256-259 ◽  
pp. 215-219
Author(s):  
Yu Liang Lin ◽  
Yi He Fang
Keyword(s):  
Plastic Deformation ◽  
Elastic Deformation ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Secant Modulus ◽  
Loading Level ◽  
Settlement Behavior ◽  
Reinforced Earth ◽  
Earth Structures ◽  
Elastic And Plastic Deformation

Three new types of reinforced earth structures were introduced including reinforced gabion retaining wall, green reinforced gabion retaining wall and flexible wall face geogrid reinforced earth retaining wall. In order to study settlement behavior of these three retaining walls, lab tests were carried out. Cyclic loading-unloading of different levels (0~50kPa, 0~100kPa, 0~150kPa, 0~200kPa, 0~250kPa, 0~300kPa, 0~350kPa) were imposed. The settlement behaviors of retaining walls were analyzed, and secant modulus when loading and unloading was obtained. Results show that retaining walls present great elastic and plastic deformation, and plastic deformation is greater than elastic deformation. Secant modulus decreases with the increase of loading-unloading cycles under the same loading level. Unloading secant modulus is bigger than loading secant modulus in the same cycle. With the increase of loading level, both elastic and plastic deformation increase, and plastic deformation increases more quickly than elastic deformation.

scholarly journals Analysis of passive earth pressure modification due to seepage flow effects

2018 ◽  
Vol 55 (5) ◽  
pp. 666-679 ◽  
Author(s):  
Z. Hu ◽  
Z.X. Yang ◽  
S.P. Wilkinson
Keyword(s):  
Limit Equilibrium ◽  
Retaining Wall ◽  
Reaction Force ◽  
Earth Pressure ◽  
Failure Surface ◽  
Friction Angle ◽  
Seepage Flow ◽  
Fourier Series Expansion ◽  
Passive Earth Pressure ◽  
Interface Friction

Using an assumed vertical retaining wall with a drainage system along the soil–structure interface, this paper analyses the effect of anisotropic seepage flow on the development of passive earth pressure. Extremely unfavourable seepage flow inside the backfill, perhaps due to heavy rainfall, will dramatically increase active earth pressure while reducing passive earth pressure, thus increasing the probability of instability of the retaining structure. A trial and error analysis based on limit equilibrium is applied to identify the optimum failure surface. The flow field is computed using Fourier series expansion, and the effective reaction force along the curved failure surface is obtained by solving a modified Kötter equation considering the effect of seepage flow. This approach correlates well with other existing results. For small values of both the internal friction angle and interface friction angle, the failure surface can be appropriately simplified with a planar approximation. A parametric study indicates that the degree of anisotropic seepage flow affects the resulting passive earth pressure. In addition, incremental increases in the effective friction angle and interface friction angle both lead to an increase in passive earth pressure.

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