scholarly journals INFLUENCE OF DISTANCE BETWEEN A RETAINING WALL AND THE EXISTING BUILDING ON STRESS-STRAIN STATE OF THE SYSTEM «RETAINING STRUCTURES – SOIL MASSIF»

2017 ◽  
Vol 2 (49) ◽  
pp. 159-170
Author(s):  
V. V. Ruchkivskyi
Keyword(s):  
Slip Surface ◽  
Mutual Influence ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Deep Excavation ◽  
Existing Building ◽  
Geological Conditions ◽  
Geotechnical Problem ◽  
Solid Soil ◽  
Protective Structures

The results of work research of engineering protective structures in a densely built–up area with difficult engineering–geological conditions have been presented. The modeling of the geotechnical problem of deep excavation protection using a three-tier retaining wall has been performed.  The task of mutual influence of existing building and deep excavation with the change of distance between them is solved. The grafs of displacement’s dependence several tiers of retaining walls from the distance to an existing building have been presented. According to these data, a plot of the dependence of displacements of separate tiers of retaining walls from the distance to an existing building is constructed. The problem is solved by the finite element method using a nonlinear model of a solid soil environment. The character of the formation of zones of potential slip surface slope is revealed. The dependence of bending moments of the retaining walls from the distance to the existing building is shown. A safe location of an existing building to a deep excavation has been substinated.

scholarly journals Research on Installation Technologies of Retaining Walls with Ground Anchors

2020 ◽  
Vol 26 (1) ◽  
pp. 53-64
Author(s):  
Mindaugas Daukšys ◽  
Mindaugas Daukšys ◽  
Jūratė Mockienė
Keyword(s):  
Tensile Strength ◽  
Retaining Wall ◽  
Evaluation Criteria ◽  
Sandy Soils ◽  
Retaining Walls ◽  
Entropy Method ◽  
Mechanical Resistance ◽  
Existing Building ◽  
Groundwater Levels ◽  
Ground Anchors

With increasing level of urbanization, new buildings are erected in close proximity of existing buildings or quite close to site boundaries. Such practice affects the complexity of retaining wall installation technology. When a retaining wall is installed close to an existing building, a street or a steep slope, the stability of the wall has to be ensured first. There are cases when a retaining wall has to be strengthened by creating a permanent or temporary support, i.e. by installing ground anchors. According to literature analysis, the major problem is that a profile stops without reaching its designed depth (Van Baars). Merifield et al. distinguish three major types of anchors: circular, square and rectangular. They emphasise that anchor surface unevenness does not impact anchor resistance. According to El Nagar, most frequently anchors disintegrate due to excessive tensile strength of the anchor. The increase of this force is related to tensile strength measured in anchor testing. In this paper, three types of retaining walls with ground anchors are considered: pile wall, Berlin Wall, and sheet piling with excavation depth of 6 m. The conditions are selected as follows: when walls are installed in clay soils, sandy soils, sandy soils at high groundwater levels, and when the wall is installed next to the building. Mechanical resistance and stability of construction incline are calculated by means of GEO5 software. A survey was designed basing on the calculation results and the selected evaluation criteria. In the survey geotechnical engineers rated 18 different cases. The relevance of criteria is determined by employing the entropy method after the primary results of the survey are summarised; afterwards a multiple criteria decision analysis carried out using the utility function. The multi-criteria assessment results indicate the most rational type of a retaining wall for the chosen conditions.

scholarly journals Multivariate modeling of retaining walls

2019 ◽  
Vol 265 ◽  
pp. 05029
Author(s):  
Vladimir A. Dmitrienko ◽  
Irina A. Kapralova ◽  
Valeria V. Baklakova ◽  
Aleksei G. Iliev ◽  
Nataliya V. Merenkova
Keyword(s):  
Retaining Wall ◽  
Retaining Walls ◽  
Multivariate Modeling ◽  
Advantages And Disadvantages ◽  
Geological Surveys ◽  
Parking Lot ◽  
Earth Embankment ◽  
Elevation Difference ◽  
Protective Structures ◽  
Technical Solutions

When designing a parking lot of limited size with a large elevation difference, a decision to construct an earth embankment with a retaining wall was made. Based on the analysis of the results of engineering geological surveys and construction conditions, four options of constructing a retaining wall were considered. The stress-strain states of the protective structures and embankments were studied in details with the help of finite element modeling in order to select the optimal technical solutions for retaining walls. Based on the analysis of the distribution of stresses and strains in the structures, the advantages and disadvantages of each option are determined. The optimal combined version of constructing a thin retaining wall with unloading screens and hardening of the embankment by means of anchor-injectors is substantiated.

scholarly journals The Diaphragm Wall Deflection Simulation Project was Tested in Ho Chi Minh City, Vietnam

2021 ◽  
Vol 9 (7) ◽  
pp. 902-907
Keyword(s):  
Retaining Wall ◽  
Retaining Walls ◽  
Ho Chi Minh City ◽  
Deep Excavation ◽  
Concrete Wall ◽  
Wall Deflection ◽  
Reinforced Concrete Wall ◽  
Lateral Displacements ◽  
The Stability ◽  
Element Technique

Checking and calculating the stability of retaining walls and deep excavation are required in the design and construction of subterranean structures, particularly the DW500 reinforced concrete Wall-Plate. This is one of the most significant approaches to preventing landslides and settlement for buildings in the immediate vicinity. In fact, calculating and forecasting the DW500 retainer wall's stability and determining the influent area can provide a variety of options for reducing reinforced frame parts (retaining wall and shoring). This technology is now being explored and used for the most realistic structures in Vietnam, particularly in Ho Chi Minh City. This article uses the finite element technique (FEM –Plaxis 2D-2019) to calculate the lateral displacements, shoring, and outer foundation for the DW500 retaining wall.

Perencanaan dinding penahan tanah untuk menanggulangi kelongsoran pada kompleks peternakan ayam di Kecamatan Kandangan, Kediri, Jawa Timur

2018 ◽  
Vol 2 (2) ◽  
pp. 86
Author(s):  
Mila K. Wardani ◽  
Felicia T. Nuciferani ◽  
Mohamad F.N. Aulady
Keyword(s):  
Natural Disasters ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Total Height ◽  
Safe Limit ◽  
Soil Retaining Walls

Landslide one of the natural disasters that caused many victims. Therefore, the landslide need a construction that can withstand landslide force. This study aims to plan retaining walls to prevent landslides in the farm area in Kandangan Subdistrict, Kediri Regency. The method used is to use slide analysis which is used to plan the retaining wall. In addition the planning of soil containment walls u ses several methods as a comparison. The results of this study indicate that the planning of ordinary soil retaining walls is still not enough to overcome slides. The minimum SF value that meets the safe limit of landslide prevention is 1.541 in the combination of 1/3 H terracing and the number of gabions as many as 7 with a total height of 2- 3 m .

scholarly journals Structural Behavior of Prefabricated Ecological Grid Retaining Walls and Application in a Highway in China

Symmetry ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 746
Author(s):  
Xinquan Wang ◽  
Cong Zhu ◽  
Hongguo Diao ◽  
Yingjie Ning
Keyword(s):  
Retaining Wall ◽  
Contact Point ◽  
Retaining Walls ◽  
Wall Structure ◽  
Soil Arching ◽  
Finite Element Software ◽  
Study Results ◽  
Stress And Deformation ◽  
Asymmetrical Condition ◽  
Construction Efficiency

The retaining wall is a common slope protection structure. To tackle the current lack of sustainable and highly prefabricated retaining walls, an environmentally friendly prefabricated ecological grid retaining wall with high construction efficiency has been developed. Due to the asymmetrical condition of the project considered in this paper, the designed prefabricated ecological grid retaining wall was divided into the excavation section and the filling section. By utilizing the ABAQUS finite element software, the stress and deformation characteristics of the retaining wall columns, soil, anchor rods, and inclined shelves in an excavation section, and the force and deformation relationships of the columns, rivets, and inclined shelves in three working conditions in a filling section were studied. The study results imply that the anchor rods may affect the columns in the excavation section and the stress at the column back changes in an M-shape with height. Moreover, the peak appears at the contact point between the column and the anchor rod. The displacement of the column increases slowly along with the height, and the column rotates at its bottom. In the excavation section, the stress of the anchor rod undergoes a change at the junction of the structure. The inclined shelf is an open structure and is very different from the retaining plate structure of traditional pile-slab retaining walls. Its stress distribution follows a repeated U-shaped curve, which is inconsistent with the trend of the traditional soil arching effect between piles, which increases first and then decreases. For the retaining wall structure in the filling section, the numerical simulated vehicle load gives essentially consistent results with the effects of the equivalent filling on the concrete column.

Application of Gabion Slope Protection of Nanyang River Channel Regulation in Tianzhen County

2011 ◽  
Vol 374-377 ◽  
pp. 1938-1941 ◽  
Author(s):  
Lian Qing Zhao ◽  
Liang Gao ◽  
Hua Jin
Keyword(s):  
Retaining Wall ◽  
Vertical Wall ◽  
River Channel ◽  
Wire Mesh ◽  
Comprehensive Management ◽  
Channel Regulation ◽  
Geological Conditions ◽  
Management Project ◽  
Slope Wall ◽  
Tianzhen County

Nanyang River channel regulation is one of the major projects for river comprehensive management project in Tianzhen reach of the Nanyang River. According to the geological conditions of ecological restoration, Gabion retaining wall is designed to protect the bed or banks of a stream against erosion. Gabion is made of double twisted hexagonal wire mesh, the thickness of gabion basket and mattress is 50 cm and 30 cm respectively. The slope protection work consists of two parts, the lower part is vertical wall and the upper part is slope wall. The results show that this work can solve the problem of uneven settlement and river scouring, sustain restoration of biodiversity and achieve the harmonious coexistence of humanity and nature.

Prediction of Internal Stability for Geogrid-Reinforced Segmental Walls

2010 ◽  
Vol 163-167 ◽  
pp. 1854-1857
Author(s):  
Anuar Kasa ◽  
Zamri Chik ◽  
Taha Mohd Raihan
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Mathematical Models ◽  
Statistical Methods ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Internal Stability ◽  
Residual Soil ◽  
Concrete Masonry ◽  
Artificial Neural

Prediction of internal stability for segmental retaining walls reinforced with geogrid and backfilled with residual soil was carried out using statistical methods and artificial neural networks (ANN). Prediction was based on data obtained from 234 segmental retaining wall designs using procedures developed by the National Concrete Masonry Association (NCMA). The study showed that prediction made using ANN was generally more accurate to the target compared with statistical methods using mathematical models of linear, pure quadratic, full quadratic and interactions.

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