scholarly journals A genetic-based model to predict maximum lateral displacement of retaining wall in granular soil

2016 ◽  
Vol 23 (1) ◽  
pp. 54-65 ◽  
Author(s):  
A. Johari ◽  
A.A. Javadi ◽  
H. Najafi
Keyword(s):  
Lateral Displacement ◽  
Retaining Wall ◽  
Granular Soil ◽  
Maximum Lateral Displacement

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.

scholarly journals Dynamic Numerical Analysis of Displacement Restraining Effect of Inclined Earth-Retaining Structure during Embankment Construction

2019 ◽  
Vol 9 (11) ◽  
pp. 2213 ◽  
Author(s):  
Su-Won Son ◽  
Minsu Seo ◽  
Jong-Chul Im ◽  
Jae-Won Yoo
Keyword(s):  
Numerical Analysis ◽  
Maximum Stress ◽  
Lateral Displacement ◽  
Retaining Wall ◽  
Field Tests ◽  
Front Wall ◽  
Construction Process ◽  
Construction Methods ◽  
Excavation Process ◽  
The Stability

Retaining walls are generally used for temporary installations during the excavation process of a construction project. They are also utilized to construct embankments in order to extend a railway facility. In this case, a retaining wall is installed during the construction process and contributes to the resistance of large amounts of stress, including the railway load. However, it is generally difficult to retain walls to maintain their stability. Therefore, alternative construction methods, such as the use of an inclined earth-retaining wall, have been utilized to suppress the lateral displacement. The stability is verified in advance through field tests; however, the maximum stress acting on the railway is thought to be the concentrated railway load. In this study, a two-dimensional numerical analysis was conducted by changing the railway load to a dynamic load. The analysis was applied according to the number of H-piles of the same length (10 m) when only the front wall was installed and when a back support was also applied. It was determined that the lateral displacement of the latter case is smaller than that of the former, whereas the resistance to dynamic loading of the former case is greater.

Study on the Lateral Piezoelectric Actuator with Actuation Range Amplifying Structure

2006 ◽  
Vol 326-328 ◽  
pp. 289-292 ◽  
Author(s):  
Taik Min Lee ◽  
Young Ho Seo ◽  
Kyung Hyun Whang ◽  
Doo Sun Choi
Keyword(s):  
Thin Film ◽  
Piezoelectric Actuator ◽  
Low Voltage ◽  
Lateral Displacement ◽  
Lateral Direction ◽  
Electrostatic Actuators ◽  
Pzt Actuator ◽  
Thermal Actuators ◽  
Piezoelectric Thin Film ◽  
Maximum Lateral Displacement

A novel piezoelectric micro-actuator with actuating range amplification structure has been proposed. This actuator is unique in that the leverage type amplification structure enables large actuating movement with low voltage. In case of general piezoelectric thin film actuator, applied voltage is low and almost zero power is consumed. Its switching time is very fast in comparison with electrostatic actuators and thermal actuators. However, the most drawback of piezoelectric actuator is short actuating range. A 100μm length PZT actuator can only make movement of 100. In this research, we suggest an actuator which can provide geometric amplification of the PZT strain displacement in lateral direction. The lateral piezoelectric MEMS actuator was fabricated and its actuating range was measured. The actuator shows maximum lateral displacement of 1.1μm, and break-down-voltage of the thin film PZT actuator is above 16V.

A Study on the Effect for Restraining Lateral Displacement of Inclined Earth Retaining Wall through the Field Experiment

2015 ◽  
Vol 15 (3) ◽  
pp. 255-264 ◽  
Author(s):  
Minsu Seo ◽  
Jongchul Im ◽  
Jinsik Kim ◽  
Seungmin Baek ◽  
Junyoung Kim ◽  
...  
Keyword(s):  
Field Experiment ◽  
Lateral Displacement ◽  
Retaining Wall

The Influence of Vertical Loads on Lateral Deformation of Steel Reinforced Concrete Column

2013 ◽  
Vol 639-640 ◽  
pp. 782-785
Author(s):  
Jia Jia Tian ◽  
Hong Li
Keyword(s):  
Reinforced Concrete ◽  
Influencing Factors ◽  
Lateral Displacement ◽  
Concrete Columns ◽  
Concrete Column ◽  
Lateral Deformation ◽  
Reinforced Concrete Column ◽  
Reinforced Concrete Columns ◽  
Steel Reinforced Concrete ◽  
Maximum Lateral Displacement

The influence of vertical loads on steel reinforced concrete column is analyzed, based on the maximum lateral displacement of 2 different steel reinforced concrete columns under different vertical loads. The vertical loads, the section properties of the steel reinforced concrete column and horizontal loads are the influencing factors.

scholarly journals Parameter Sensitivity Analysis on Deformation of Composite Soil-Nailed Wall Using Artificial Neural Networks and Orthogonal Experiment

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Jianbin Hao ◽  
Banqiao Wang
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Lateral Displacement ◽  
Friction Angle ◽  
Soil Nailing ◽  
Factors Affecting ◽  
Soil Nail ◽  
Anchor Cable ◽  
Nail Diameter ◽  
Maximum Lateral Displacement

Based on the back-propagation algorithm of artificial neural networks (ANNs), this paper establishes an intelligent model, which is used to predict the maximum lateral displacement of composite soil-nailed wall. Some parameters, such as soil cohesive strength, soil friction angle, prestress of anchor cable, soil-nail spacing, soil-nail diameter, soil-nail length, and other factors, are considered in the model. Combined with thein situtest data of composite soil-nail wall reinforcement engineering, the network is trained and the errors are analyzed. Thus it is demonstrated that the method is applicable and feasible in predicting lateral displacement of excavation retained by composite soil-nailed wall. Extended calculations are conducted by using the well-trained intelligent forecast model. Through application of orthogonal table test theory, 25 sets of tests are designed to analyze the sensitivity of factors affecting the maximum lateral displacement of composite soil-nailing wall. The results show that the sensitivity of factors affecting the maximum lateral displacement of composite soil nailing wall, in a descending order, are prestress of anchor cable, soil friction angle, soil cohesion strength, soil-nail spacing, soil-nail length, and soil-nail diameter. The results can provide important reference for the same reinforcement engineering.

Research on Influence of Concrete Pouring Sequence on Stability of High-Formwork Support System

2014 ◽  
Vol 580-583 ◽  
pp. 2235-2238
Author(s):  
Li Liu ◽  
Ju Chao Wang ◽  
Bo Wang ◽  
Ya Nan Liu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Support System ◽  
Lateral Displacement ◽  
The Other ◽  
Sudden Increase ◽  
Analysis Software ◽  
Element Analysis ◽  
Loading Process ◽  
Maximum Lateral Displacement

ANSYS finite element analysis software is used to simulate the changes of maximum lateral displacement of the high-formwork support system in different sequences of pouring concrete. In the condition of loading which was applied from one side to the other side, the maximum lateral displacement of the frame had a sudden increase in each loading process. In the condition of loading which was applied symmetrically, the maximum lateral displacement of the high-formwork steadily rising nearly straight with the load applied. So the symmetrical pouring concrete ways is better for the whole stability of the high-formwork.

Analysis on Deep Excavation in Soft Soil Located on Sloped Bedrock

2012 ◽  
Vol 170-173 ◽  
pp. 13-19
Author(s):  
Shong Loong Chen ◽  
Cheng Tao Ho
Keyword(s):  
Lateral Displacement ◽  
Retaining Wall ◽  
Soft Soil ◽  
Soft Clay ◽  
Observation Data ◽  
Clay Layer ◽  
Deep Excavation ◽  
Element Analysis ◽  
2D Strain ◽  
Significant Difference

Deep excavations in soft-clay layer on sloped bedrock often leads to lateral displacement on retaining structures and uneven settlement due to unbalanced pressure generated from excavation. A construction project for which an excavation was complete in soft clay layer on sloped bedrock in Taipei City was adopted in the study. It is learned from the observation logs of the studied case that a significant difference exists in the lateral displacement of diaphragm wall and settlement between up and down-slope sides of sloped bedrock. Deep excavation is in fact profoundly complicated interaction between excavation strutting and soil. In general practice, the design of excavation is frequently simplified as a 2D strain behavior. However, the actual excavation on sloped bedrock is quite different from 1D or 2D simulation in a symmetric manner. Therefore, 2D finite element analysis program, PLAXIS, is introduced for the analysis on the behaviors of soil clay layer on sloped bedrock in excavation. The result is compared with onsite observation data, including displacement of retaining wall, settlement, axial loads of struts and others. The result of retaining wall displacement analysis is found consistent with the trend derived from onsite observation, which is possible for reference of similar engineering analyses and designs in the future.

scholarly journals Influence of parameters in soil hardening model on deformation of excavation

2020 ◽  
Vol 198 ◽  
pp. 02015
Author(s):  
Peng-fei CHEN ◽  
Xiao-nan GONG
Keyword(s):  
Power Index ◽  
Lateral Displacement ◽  
Retaining Wall ◽  
Friction Angle ◽  
Secant Modulus ◽  
Single Variable ◽  
Hardening Model ◽  
Calculation Results ◽  
Soil Hardening ◽  
Soil Weight

Based on the data of the soil and enclosure structure of a certain excavation, a PLAXIS model was established. The actual monitoring results are compared with the PLAXIS calculation results to verify the reliability of the model. On this basis, the six main parameters in the soil hardening model were changed by a single variable method to obtain the influence of each parameter on the deformation of the excavation. As the soil weight or Poisson’s ratio increases, the lateral displacement of the retaining wall increases. With the increase of the secant modulus or cohesive force or internal friction angle of the soil, the lateral displacement of the retaining wall decreases. The power index m has basically no effect on the lateral displacement of the retaining wall. With the increase of m, the settlement of the soil gradually increases uniformly.

Analysis of Soil Disturbance Caused by Pipe Jacking Construction

2012 ◽  
Vol 166-169 ◽  
pp. 1480-1483
Author(s):  
Yang Sun ◽  
Zheng Liang Xu
Keyword(s):  
Environmental Impacts ◽  
Lateral Displacement ◽  
Earth Pressure ◽  
Soil Disturbance ◽  
Field Monitoring ◽  
Jiangsu Province ◽  
The Common ◽  
Pipe Jacking ◽  
And Control ◽  
Maximum Lateral Displacement

Open caisson is one of the common used structures, as a working shaft in pipe jacking project. Disturbance of the soil behind the reaction wall of open caisson (SBRWOC) will reduce the efficiency of jacking, and affect safety of site operation and control. However, there are few studies on disturbance of SBRWOC. In this paper, combining the project of parallel pipe jacking passing under the Guan River in Jiangsu Province, China, field monitoring of SBRWOC is carried out during pipe jacking construction, including earth pressure and lateral displacement of SBRWOC. The maximum lateral displacement of SBRWOC is about 27 mm and the maximum earth pressure is 98.5 kPa. These results are useful for engineers to study disturbance characteristics of SBRWOC and reduce environmental impacts during pipe jacking construction.

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