Research on Geogrid Strain of Reinforced Earth Retaining Wall by Numerical Simulation

2013 ◽  
Vol 353-356 ◽  
pp. 927-932
Author(s):  
Ji Cheng Wang ◽  
Ai Liu ◽  
Chuan Fa Yan
Keyword(s):  
Numerical Simulation ◽  
Horizontal Plane ◽  
Retaining Wall ◽  
Cost Effective ◽  
Soil Pressure ◽  
Rupture Surface ◽  
Research Results ◽  
Reinforced Earth ◽  
Use Efficiency ◽  
The Relationship

Numerical simulation was used to study the relationship between reinforced earth retaining wall gradient and geogrid strain. Research results show that when the load on the wall top is small, the function of geogrids in the upper section of retaining wall is not brought to full play, the angle between potential rupture surface and horizontal plane is small and resembles Rankines active soil pressure rupture surface, and it is far from wall face. When the load on wall top increases, potential rupture surface becomes steep, the distance between the surface and wall face is about one third of wall height. Inclined wall face also displays this property. The gentler the reinforced earth retaining wall gradient is, the smaller the geogrid stress is, and the safer the wall is. However, when gradient drops below 1:0.4, safety increase becomes vague. When wall gradient is 1:0.3, geogrid stress is most uniformly distributed, and thus has the highest use efficiency and the wall is the most cost-effective.

Relaxation Laws of Anchor on Pressure Dispersive Retaining Wall

2014 ◽  
Vol 672-674 ◽  
pp. 1863-1867
Author(s):  
Jian Qing Wu ◽  
Ying Yong Li ◽  
Hong Bo Zhang ◽  
Xiu Guang Song ◽  
Qing Yu Meng ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Retaining Wall ◽  
Anchor Plate ◽  
Soil Pressure ◽  
Overall Stability

In order to study anchor relaxation of pressure dispersive retaining wall, the numerical simulation model was designed to simulate the retaining wall with single anchor plate. The results showed that the pressure dispersive retaining wall had good overall stability. Anchor Relaxtion had two sudden changes. As a result, the lateral soil pressure near the anchor had been released and the displacement Significantly increased.

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.

Numerical Simulation for Dynamic Response of EPS Geofoam Seismic Buffers

2011 ◽  
Vol 378-379 ◽  
pp. 256-261
Author(s):  
Yi Min Wang ◽  
Huan Li ◽  
Hui Zhang
Keyword(s):  
Numerical Simulation ◽  
Dynamic Response ◽  
Retaining Wall ◽  
Numerical Data ◽  
Good Effect ◽  
Lagrangian Analysis ◽  
Soil Pressure ◽  
Eps Geofoam ◽  
Pressure Time ◽  
Dynamic Time

Numerical simulation for dynamic response of EPS geofoam seismic buffers placed behind the rigid retaining walls was carried out with the Fast Lagrangian Analysis for Continuum method (FLAC) .The considerations of setting boundary condition of the numerical model, inputting and correcting the dynamic time series of seismic acceleration, and selecting the proper damping were discussed. The coincidence relations of compression-time for EPS geofoam buffers and the horizontal soil pressure -time for retaining wall were numerically calculated by using the proposed model. The calculating results were compared with the physical testing results. The comparisons showed that there were good agreements between the numerical data and the measured data. The numerical results indicate that EPS panels placed between the rigid retaining wall and the backfill soil have a good effect on reducing horizontal earth force during shaking acceleration and can act as seismic buffers against earthquake. The FLAC model provides a feasible way to analyze the dynamic response of EPS geofoam seismic buffers for further researches.

scholarly journals Verification Analysis of the Relationship Between Soil Pressure and Displacement of Retaining Structure

2022 ◽  
Vol 2152 (1) ◽  
pp. 012014
Author(s):  
Jinyong Chen ◽  
Zhongchao Li ◽  
Rongzhu Liang ◽  
Guosheng Jiang ◽  
Wenbing Wu
Keyword(s):  
Analytical Model ◽  
Retaining Wall ◽  
Great Influence ◽  
Earth Pressure ◽  
Hyperbolic Function ◽  
Soil Pressure ◽  
Function Model ◽  
Retaining Structure ◽  
The Relationship ◽  
Sinusoidal Function

Abstract Variation laws of earth pressure accounting for the displacement of are taining wall can be well described by mathmatical fitting in the study of the relationship between earth pressure and retaining wall displacement. The common mathematical function expressions of earth pressure displacement of retaining wall can be divided into sinusoidal function model, exponential like function model, hyperbolic function model, fitting function and semi-numerical and semi-analytical model function, etc. The characteristics and shortcomings of the current expression of earth pressure displacement function are summarized. Then combined with the field test and model test, the applicability and characteristics of various mathematical functions in predicting the displacement of earth pressure with retaining structures are analyzed. The results show that when the displacement is small, the sinusoidal function model and the quasi-exponential function model are close to the measured results. When the displacement of retaining structure is large, the fitting results of hyperbolic model and semi-numerical and semi-analytical model are better. For the prediction of earth pressure displacement relationship in passive area, the buried depth has a great influence. And the error between the theoretical value and the actual value has a great influence on the fitting result of the model.

Study on Lateral Earth Pressure of Anchored Retaining Wall

2013 ◽  
Vol 353-356 ◽  
pp. 312-317
Author(s):  
Ying Yong Li ◽  
Li Zhi Zheng ◽  
Hong Bo Zhang ◽  
Xiu Guang Song ◽  
Zhi Chao Xue
Keyword(s):  
Numerical Simulation ◽  
Pressure Distribution ◽  
Model Test ◽  
Retaining Wall ◽  
Field Tests ◽  
Earth Pressure ◽  
Soil Pressure ◽  
Gravity Retaining Wall ◽  
Lateral Earth Pressure ◽  
The Stability

In order to ensure the security of gravity retaining wall in the high fill subgrade, the design of gravity retaining wall with anchors is proposed,the characteristic of the new wall is that comment anchors are added to the traditional gravity retaining wall,by friction anchors provide lateral pull to the wall so the stability of the new wall is improved. Because of the constraints of anchors, the lateral free deformation is influenced and the soil pressure distribution is very complicated, field tests showed that soil pressure distribution is nonlinear and pressure concentrate in anchoring position. In order to reveal the supporting mechanism of retaining wall and propose the soil pressure formula, the model test of anchor retaining wall is made and numerical simulation is done. The results show that soil pressure appears incresent above the anchor and decreasing below the anchor, the soil pressre also grew larger away from the anchor proximal in the horizontal direction.

Analysis of Engineering Application about Reinforced Earth Retaining Wall

2013 ◽  
Vol 353-356 ◽  
pp. 585-588 ◽  
Author(s):  
Shu Lian Wen ◽  
Hai Bin La
Keyword(s):  
Retaining Wall ◽  
Engineering Application ◽  
Reinforced Soil ◽  
Test Results ◽  
Soil Pressure ◽  
Construction Period ◽  
Architectural Engineering ◽  
Vibration Resistance ◽  
Foundation Treatment ◽  
Reinforced Earth

Geogrids reinforced soil retaining walls are widely used in various fields, such as highway, railway, architectural engineering, hydraulic engineering and so on because of its remarkable economical benefits, constructing convenience, adaption to the foundation simplicity of foundation treatment good vibration resistance shapely configuration and environmental pollution-free etc. Combined with a real engineering, the applied effects of geogrids reinforced earth retaining was tested. Based on the field test results and finite element method numerical analysis, the engineering characteristics of blocking reinforced earth retaining wall that used lime soil as filled material in construction period and after completion were opened out. The distributing characteristics and rules of wall back lateral soil pressure, tensile bar pull were put forward. Thus, technical references were provided for the similar structures.

Numerical Simulation on Soil Pressure Distribution Characteristics of Gravity Retaining Wall

2013 ◽  
Vol 477-478 ◽  
pp. 562-566
Author(s):  
Fang Ding He ◽  
Guang Jun Guo ◽  
Zhi Dong Zhou ◽  
Jian Qing Wu
Keyword(s):  
Numerical Simulation ◽  
Pressure Distribution ◽  
Retaining Wall ◽  
Critical Length ◽  
Distribution Theory ◽  
Simulation Software ◽  
Distribution Characteristics ◽  
Soil Pressure ◽  
Linear Distribution ◽  
Gravity Retaining Wall

The anchor plays a very important role in gravity retaining wall. The displacement of retaining and soil pressure distribution with anchor is different from that without anchor. The numerical simulation software FLAC3D is used to analysis the soil pressure distribution characteristics of gravity retaining wall. The results show that the anchor plays a supporting role in gravity retaining wall. There is a critical length in the anchor in gravity retaining wall. The soil pressure distribution of gravity retaining wall with anchor does not conform to the classical Coulomb linear distribution theory and more research is needed for the soil pressure distribution theory. The research has important guiding significance on the design and construction development of gravity retaining wall.

Soil Pressure Test and Numerical Analysis on Reinforced Earth Retaining Wall of Green Gabion

2014 ◽  
Vol 644-650 ◽  
pp. 5039-5045
Author(s):  
Xiao Yang ◽  
Guo Lin Yang
Keyword(s):  
Numerical Analysis ◽  
Field Test ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Wall Surface ◽  
Soil Pressure ◽  
Reinforced Earth ◽  
Earth Pressures ◽  
Flexible Wall ◽  
Vertical Earth Pressure

Based on reinforced earth retaining wall of green gabion which is built at the site of seventh project Shaoxing-Zhuji Expressway, the research for soil pressure in a cross section which locate at the site of K38+398kmare made by field test and numerical analysis. The horizontal and vertical earth pressure are studied in the construction, The pressures between field test and numerical analysis which depend on FLAC3D are rough similar. With increased of height in filling soil, the earth pressures on the wall toe in 3 direction such as horizon , vertical, 45°are increased ,and then gradually come to stability after construction. With increased of height in filling soil, the vertical earth pressures is increased, but the distribution for earth pressure at the same height is non-uniform. The horizontal earth pressure on the back of wall surface increases fast at first then decreases a little, which is a single peak-shaped, it distributes along the wall height in non-linear form, the maximum occurs at 1/3H. The result between field test and numerical model are different, because the flexible wall surface has a great affection on unload.

Academic motivation and professional skills development in the Specialty of Social Sciences and Tourism at a public university [Motivación académica y desarrollo de competencias profesionales en la Especialidad de Ciencias Sociales y Turismo de una universidad pública]

2019 ◽  
Vol 1 (2) ◽  
pp. 96
Author(s):  
Ana Cecilia De Paz Lazaro ◽  
Jessica Luz Palomino Collantes
Keyword(s):  
Social Sciences ◽  
Academic Motivation ◽  
Public University ◽  
Skills Development ◽  
Professional Skills ◽  
Research Results ◽  
Competencias Profesionales ◽  
High Level ◽  
The Relationship

The objective of the research is to determine the relationship between academic motivation and the professional skills development in the specialty of Social Sciences and Tourism. The study is quantitative and the design is non-experimental correlational translational. The results indicate that there is a high level relationship (0.914) between the independent academic motivation variable and the professional competences development in the Specialty of Social Sciences and Tourism. In conclusion, motivation is directly related to the professional skills development in the specialty of Social Sciences and Tourism. The research results conclude that there is a high relationship between the variables.

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