scholarly journals Study on Control of Wall Deflection in Earth Stepped-Twin Retaining Wall Using Anchor Method by means of Numerical Simulation

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Kazuki Maehara ◽  
Akihiro Hamanaka ◽  
Takashi Sasaoka ◽  
Hideki Shimada ◽  
Seiya Sakuma
Keyword(s):  
Numerical Simulation ◽  
Soil Properties ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Outer Wall ◽  
Horizontal Distance ◽  
Wall Deflection ◽  
The Earth ◽  
Adjacent Structures ◽  
The Difference

The demand for specific earth retaining wall methods is increasing along with the advancement and overcrowding of underground space use such as the presence of adjacent structures in an urban area. To cope with this, the method named earth stepped-twin retaining wall is increasingly being applied. However, there is a concern about the workplace if the earth pressure causes a heaving and pressing phenomenon from both ends of the retaining wall in the earth stepped-twin retaining wall. Therefore, we proposed the application of an anchor method that contains the inner and outer walls by using numerical simulation. The effects of the difference in soil properties, the horizontal distance between the outer and inner walls, and the depth of the outer wall embedment on the anchor were investigated. The results of this study show that the wall deflection of the inner wall could improve by adopting the anchor support. Besides, it was found that the inner wall can be efficiently suppressed by adopting the hybrid system with anchors and struts according to the soil properties, horizontal distance, and the depth of the outer wall.

scholarly journals Stability analysis of composite I-shaped masonry reinforced retaining wall

2020 ◽  
Vol 198 ◽  
pp. 02032
Author(s):  
Wu Yuedong ◽  
Zhang Lei ◽  
Xu Nan ◽  
Lui Jian
Keyword(s):  
Numerical Simulation ◽  
Retaining Wall ◽  
Single Layer ◽  
Earth Pressure ◽  
Horizontal Displacement ◽  
Finite Element Software ◽  
The Earth ◽  
Overall Stability ◽  
The Stability ◽  
Reinforced Retaining Wall

Based on the actual project, the influence of geogrid on the stability of the retaining wall of the single-layer masonry reinforced retaining wall is studied through field test and finite element software ABAQUS numerical simulation. The influence of geogrid on the stability of the retaining wall was determined by analyzing the changes in the pressure of the backfill, the displacement of the retaining wall and the strain of the geogrid, and changing the length and spacing of the geogrid through the controlled variable method. The results show that the geogrid can limit the horizontal displacement of the soil, balance the earth pressure, and improve the overall stability of the retaining wall. By increasing the length of the geogrid and reducing the distance of the geogrid, the design of the retaining wall is optimized, which has good economic and time benefits.

Study on Soil Pressure of High Fill Retaining Wall in Construction Stage

2012 ◽  
Vol 204-208 ◽  
pp. 718-721 ◽  
Author(s):  
Peng Li ◽  
Xiao Song
Keyword(s):  
Retaining Wall ◽  
Earth Pressure ◽  
Monitoring Data ◽  
Experiment Study ◽  
Pressure Monitoring ◽  
Soil Pressure ◽  
Construction Stage ◽  
The Earth ◽  
Pressure Calculation ◽  
Practical Guidance

The traditional formula using for the calculation of Expressway on high embankment of the retaining wall and the earth pressure can not be very good practical. In order to accurately determine the soil pressure calculation of the complex retaining wall in construction stage for guaranteeing the engineering safety, the experiment study on soil pressure is done, and the study on soil pressure monitoring data is also done. Then the valuable conclusions are obtained to facilitate better practical guidance for construction.

A Double Inequality Method for Calculate the Loading Capacity of a Sheet Pile DIMSP

2012 ◽  
Vol 268-270 ◽  
pp. 725-728
Author(s):  
Yi Huan Xie
Keyword(s):  
Retaining Wall ◽  
Engineering Application ◽  
Earth Pressure ◽  
Plasticity Condition ◽  
Loading Capacity ◽  
Sheet Pile ◽  
Double Inequality ◽  
The Earth ◽  
Additional Correction ◽  
Set Up

The passive earth pressure on the both sides of a sheet pile retaining wall is owing to plasticity bounded, a fact that affects the horizontal loading capacity of the wall. In order to find out a method, that the loading capacity of the wall can be analytically calculated and the mentioned constrain could be token into account, the paper set up a DIMSP model, which consists of mechanics equilibrium principle including two inequalities for the plasticity condition of earth pressure. The deduced solution of the model is capable of calculating the bearing capacity, and possesses the advantages of no additional correction of the cut in depth of the wall. Further more the continuity of earth pressure distribution is ensured by this model, an adjustment of the earth pressure figure is also without difficulty possible. For engineering application some graphics are given, the cut in depth of the wall can be read from them conveniently.

Study on the applicability of a retaining wall using batter piles in clay

2016 ◽  
Vol 53 (8) ◽  
pp. 1195-1212 ◽  
Author(s):  
Minsu Seo ◽  
Jong-Chul Im ◽  
Changyoung Kim ◽  
Jae-Won Yoo
Keyword(s):  
Lateral Displacement ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Integrated System ◽  
Element Analysis ◽  
Test Execution ◽  
The Earth ◽  
National University ◽  
Clay Ground ◽  
Batter Piles

A retaining wall using batter piles has been developed and studied to improve existing earth-retaining structures at Pusan National University. The earth-retaining method is a temporary excavation method using an integrated system of front supports and batter piles. The batter piles connected to the front supports significantly reduce the earth pressure acting on the front supports by distributing it to batter piles to increase structural stability. In this study, the existence of batter piles, the fixity of the tips of front supports or batter piles, the spacing between batter piles, and the verticality of front supports are varied across model tests. The lateral displacement of the earth-retaining wall decreased by approximately 40% and 15% for the existence and fixity of batter piles, respectively. The applicability of the earth-retaining method using batter piles has been verified with finite element analysis and field test execution in clay ground.

Numerical Simulation on the Stress Characteristics of Prestressed Retaining Wall

2013 ◽  
Vol 477-478 ◽  
pp. 596-599
Author(s):  
Jian Qing Wu ◽  
Hong Bo Zhang ◽  
Xiu Guang Song ◽  
Yi Fan Yu ◽  
Chao Li
Keyword(s):  
Numerical Simulation ◽  
Stress Distribution ◽  
Bearing Capacity ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Lateral Earth Pressure ◽  
Prestressed Anchor

With the highway subgrade fill increasing, traditional retaining wall cannot meet the requirements for supporting. To meet this requirement, the prestressed opposite-pull retaining wall was put forward. Due to the anchor pull of the new-style retaining wall, its bearing capacity was enhanced, but the stress is not clear. In order to reveal the stress distribution of the prestressed opposite-pull retaining wall, FLAC3D was adept to do numerical simulation on the new-style retaining wall. It simulated three conditions of the wall with no anchor, with anchor but without prestress and with prestressed anchor. The results showed that, after the layout of prestressed anchor, the lateral earth pressure of the region near the anchor increased with the increase of prestress, the lateral earth pressure of the wall is parabola distribution. The lateral earth pressure was larger than that of the wall with no anchor and with anchor but without prestress. The bearing capacity of the retaining wall was effectively improved.

scholarly journals Calculation of Active Earth Pressure for Narrow Backfill with a Curved Slip Surface

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Zhihui Wang ◽  
Aixiang Wu ◽  
Yiming Wang
Keyword(s):  
Equilibrium Equation ◽  
Slip Surface ◽  
Limit Equilibrium ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Failure Surface ◽  
Friction Angle ◽  
Force Balance ◽  
Vertical Force ◽  
The Earth

A method was proposed to calculate the earth pressure from a cohesionless backfill with a high aspect ratio (ratio of height to width of retaining wall). An exponential equation of slip surface was proposed first. The proposed nonlinear slip surface equation can be obtained once the width and height of the backfill as well as the internal friction angle of the backfill were given. The failure surface from the proposed formula agreed well with the experimental slip surface. Then, the earth pressure was calculated using a simplified equilibrium equation based on the proposed slip surface. It is assumed that the minor principal stress of the backfill near the wall and at its corresponding slip surface where the depth is the same is the same. Thus, based on the vertical force balance of the horizontal backfill strip, assuming the wall-soil interface and the slip surface is in the limit equilibrium state, defined by the Mohr–Coulomb criterion, the differential equilibrium equation was obtained and numerically solved. The calculated results agreed well with the test data from the published literature.

FEM Simulation of Earth Pressure on Geosynthetic-Reinforced Soil Retaining Wall under Variable Rate Loading

2012 ◽  
Vol 594-597 ◽  
pp. 266-269
Author(s):  
Fu Lin Li ◽  
Fang Le Peng
Keyword(s):  
Finite Element ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Reinforced Soil ◽  
Physical Model Test ◽  
Variable Rate ◽  
Geosynthetic Reinforced Soil ◽  
Rate Dependent ◽  
The Earth ◽  
Dependent Behavior

On the basis of the Dynamic Relaxation method, a nonlinear finite element method (FEM) analysis procedure was developed for the geosynthetic-reinforced soil retaining wall. The FEM procedure technique incorporated the unified three-component elasto-viscoplastic constitutive model which can consider the rate-dependent behavior of both the backfill soil and the geosynthitic reinforcement. A simulation was performed on a physical model test on geosynthetic-reinforced soil retaining wall to validate the presented FEM. Extensive finite-element analyses were carried out to investigate the earth pressure distributions from the back of retaining wall under variable rate loading. It is shown that this FEM can well simulate the rate-dependent behavior and the earth pressure of geosynthetic-reinforced soil retaining wall.

The Research on Earth Pressure behind Inclined Retaining Wall Considering Arching Effects

2013 ◽  
Vol 790 ◽  
pp. 410-413
Author(s):  
Jian Ming Zhu ◽  
Qi Zhao
Keyword(s):  
Stress State ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Vertical Stress ◽  
Soil Arching ◽  
Active Pressure ◽  
Passive Pressure ◽  
The Earth ◽  
Two Factors

The earth pressure behind inclined wall considering the soil arching effects which was decided by two factors, the coefficient and average vertical stress, was necessary to research. Based on the analysis of stress state behind the retaining wall, the unified solution of active pressure and passive pressure was derived and was used to calculate both the magnitude and point of application. According to examples, as the angle of inclined retaining wall increasing which was signifying by , the arching effects would be also increasing which the soil was in the passive limit and be falling which the soil was in the active limit.

scholarly journals Lateral Earth Pressure behind Walls Rotating about Base considering Arching Effects

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Dong Li ◽  
Wei Wang ◽  
Qichang Zhang
Keyword(s):  
Conversion Factor ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Soil Mass ◽  
Shear Stresses ◽  
Key Factors ◽  
Lateral Earth Pressure ◽  
The Earth ◽  
Common Effect ◽  
The Common

In field, the earth pressure on a retaining wall is the common effect of kinds of factors. To figure out how key factors act, it has taken into account the arching effects together with the contribution from the mode of displacement of a wall to calculate earth pressure in the proposed method. Based on Mohr circle, a conversion factor is introduced to determine the shear stresses between artificial slices in soil mass. In the light of this basis, a modified differential slices solution is presented for calculation of active earth pressure on a retaining wall. Comparisons show that the result of proposed method is identical to observations from model tests in prediction of lateral pressures for walls rotating about the base.

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