The Influences of Interpile Soil Reinforcement on the Performance of Structures with Double-Row Piles

2012 ◽  
Vol 170-173 ◽  
pp. 195-198
Author(s):  
Qing Ke Zhu
Keyword(s):  
Engineering Application ◽  
Internal Force ◽  
Calculation Model ◽  
Reinforced Soil ◽  
Soil Reinforcement ◽  
Double Row ◽  
Finite Element Software ◽  
Study Results ◽  
Practical Engineering ◽  
Design Construction

We established a calculation model for retaining structures with double-row piles by using the midas GTS finite-element software, considering the interaction between pile and soil and adopting the contact element method, on the basis of a practical engineering application. We then determined a reasonable elastic modulus of reinforced soil bodies, thereby enabling the study of the influences of the reinforcement depth and width in the interpile soil on the internal force and displacement of the retaining structure with double-row piles. We present suggestions for reinforcement depth and width. The study results provide valuable reference for engineering design, construction, and cost control.

Study on Effect of Excavation Depth on Internal Force of Retaining Structure of Arc Row Piles with Arc Ring Beam on the Pile Top

2014 ◽  
Vol 919-921 ◽  
pp. 762-768
Author(s):  
Zhi Wei Zhang ◽  
Rong Gui Deng ◽  
Ze Shuo Chen
Keyword(s):  
Internal Force ◽  
Calculation Model ◽  
Structure Calculation ◽  
Foundation Pit ◽  
Engineering Research ◽  
Retaining Structure ◽  
Body Distribution ◽  
Practical Engineering ◽  
Set Up ◽  
Deformation Compatibility

In order to control deformation of foundation pit effectively and guarantee safety of building around, utilizing the stress characteristics of arch, use the new spatial retaining structure of arc row piles with arc ring beam on the pile top. The arc ring beam can provide constraint to pile top, so internal force of pile body distribution is uniform, and improve the integrity stability of piles. The ring beam with compression mainly can give use of high compression capability of concrete. According to the high order statically indeterminate characteristics of the retaining structure, calculation model of ring beam and pile respectively is established by the redundant forces between beam and pile top. By using deformation compatibility to set up flexibility equation of the retaining structure, and solve the redundant forces, then calculate the internal force and displacement of ring beam and piles. Through calculating the practical engineering, research the effect of excavation depth on internal force and displacement of piles and the arc ring beam on the pile top.

scholarly journals Study on Internal Force of Tunnel Segment by Considering the Influence of Joints

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Linwei Dong ◽  
Zhiyong Yang ◽  
Zhenyong Wang ◽  
Yaowen Ding ◽  
Weiqiang Qi
Keyword(s):  
Mechanical Characteristics ◽  
Mechanical Performance ◽  
Spline Interpolation ◽  
Engineering Application ◽  
Internal Force ◽  
Load Test ◽  
Principle Of Superposition ◽  
Joint Rotation ◽  
Practical Engineering ◽  
Unloading Effect

The mechanical performance of segments is an important aspect of the safety of tunnel structures. Study on the internal force of tunnel segment by considering the influence of joints is beneficial for obtaining a better understanding of the influence of various factors on the internal force of the segments. Based on the mechanical characteristics of shield segment joints, in which the displacements and stiffness are discontinuous, a mechanical model of the segment component under the constraints of elastic support was established. The elastic centre method and the principle of superposition were used to quantify the influence of joint displacements on the internal force of the segment component. Combined with a practical engineering application, the internal force of the segment component with joint rotation and dislocation was analysed. The displacements of the segment joints cause an unloading effect of the corresponding internal force of the joints, leading to internal force redistribution of each segment cross section. According to the spline interpolation results of the load test data of the segment joints, the internal force of the segment component under an external load is solved by the iterative method.

The Analysis of Large Space Shear Wall Structure under Wind Load Force

2012 ◽  
Vol 549 ◽  
pp. 830-833
Author(s):  
Li Jian Zhou ◽  
Ming Kang Shan ◽  
Jin Zhou He ◽  
Yuan Gang Fan
Keyword(s):  
Three Dimensional ◽  
Shear Wall ◽  
Internal Force ◽  
Calculation Model ◽  
Wind Loads ◽  
Load Force ◽  
Wall Structure ◽  
Large Space ◽  
Finite Element Software ◽  
Different Thickness

This paper established three-dimensional calculation model of three large space shear wall structures of different thickness,using finite element software ANSYS to analyze the wind loads and vertical loads of the internal force. And analyze the displacement, internal force distribution pattern. Under the wind loads and vertical loads of three different thickness wall of the large space wall structure.

Numerical Calculation of Soil Pressure inside the Lattice Type Steel Sheet Pile Wharf Structure

2013 ◽  
Vol 405-408 ◽  
pp. 1427-1430
Author(s):  
Jin Song Gui ◽  
Yu Fu ◽  
En Kai Bi
Keyword(s):  
Finite Element ◽  
Numerical Calculation ◽  
Steel Sheet ◽  
Engineering Application ◽  
Calculation Model ◽  
Sheet Pile ◽  
Soil Pressure ◽  
Type Steel ◽  
Finite Element Software ◽  
Lattice Type

Lattice type steel sheet pile wharf is a new type of wharf structure, which is increasingly and widely used, but its structure is complicated, and the calculation theory is not perfect. This paper uses the general finite element software ABAQUS to establish the finite element numerical calculation model of grid shape steel sheet pile structure. The result was deeply researched and analysed,so some useful conclusions are drawn that can be used as references in the engineering application.

Numerical Simulation and Experimental Study on Vibration-Decreasing Function of the Barrier Holes

2014 ◽  
Vol 602-605 ◽  
pp. 53-59
Author(s):  
Zhen Lei ◽  
Qiang Kang ◽  
Ming Sheng Zhao ◽  
En An Chi
Keyword(s):  
Numerical Simulation ◽  
Experimental Study ◽  
Finite Element ◽  
Test Site ◽  
Double Row ◽  
Single Row ◽  
Finite Element Software ◽  
Practical Engineering ◽  
Hole Number ◽  
Better Than

The finite-element software ANSYS/LS-DYNA was used to study the influence of various parameters of barrier hole on the vibration-decreasing effect, such as the diameter, spacing, depth, hole number and row number of barrier holes and distance from blast holes to barrier holes. The simulation study indicates that: vibration-enhancing area and vibration-decreasing area exist together behind the barrier holes; various parameters of barrier holes can apparently affect the location, range and results of the vibration-enhancing area and the vibration-decreasing area; With bigger diameter, shorter distance, larger number and deeper barrier holes, the better vibration-decreasing results will come out; Under the conditions of numerical simulation in this paper, the effect of double-row barrier holes are better than that of single-row barrier holes, and the effect of vibration-decreasing of triangle layout form is almost the same as rectangle layout form of barrier holes; the changing distance between vibration barrier holes and blast holes will have a fluctuating effect on the vibration-decreasing effect, thus we should select the best location of vibration barrier holes based on the actual engineering conditions in practical engineering. The largest vibration-decreasing ratio of the barrier holes we have obtained at the test site is 33.3%, which is successfully utilized in the production explosion, so we have verified effectiveness of vibration-decreasing effect of the barrier holes.

Compared Analysis of Deformation Monitoring with Numerical Simulation on Pile-Anchor Supporting System of Deep Foundation Pit in Soil-Rock Dualistic Area

2013 ◽  
Vol 353-356 ◽  
pp. 3598-3605
Author(s):  
Xiao Dong Yi ◽  
Peng Huang ◽  
Zhi Chao Wang
Keyword(s):  
Deformation Monitoring ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Dual Structure ◽  
Deep Foundation Pit ◽  
Finite Element Software ◽  
Whole Process ◽  
Practical Engineering ◽  
Similar Location ◽  
Design Construction

Deep foundation pit supporting in soil-rock areas has been occurred commonly in Dalian. In the dual structure deep foundation pit in which platform is reserved, pile-anchor support as a typical form of foundation pit support, how to play its role effectively and make the design economical and safety is the subject which was explored continuously in recent years. Through a practical engineering case, this paper will use finite element software ABAQUS to simulate the whole process of pit excavation. Simulation results show that the boundary of the dual structure is the key position that caused the “sharp deformation” of the supporting structure. Compared with monitoring data, the results indicate that the reliability of the numerical model and the relevant deformation laws are verified, which can be used for the reference for the design, construction and monitoring of the deep foundation pit support in the similar location.

scholarly journals Study of Microstructure and Properties of 316L with Selective Laser Melting Based on Multivariate Interaction Influence

2020 ◽  
Vol 2020 ◽  
pp. 1-15 ◽  
Author(s):  
Jianfeng Sun ◽  
Lu Shen ◽  
Weiqiang Wang ◽  
Zhu Liu ◽  
Huaming Chen ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Secondary Growth ◽  
Engineering Application ◽  
Regression Equations ◽  
Laser Melting ◽  
Performance Indexes ◽  
Study Results ◽  
Practical Engineering ◽  
Scan Speed ◽  
Grain Width

The selective laser melting technique is widely used in aerospace and biomedical industries, and the performance of formed 316L parts is significantly subject to the forming angle. As the selective laser melting 316L parts are constrained by multiple performance indexes, the study involves multivariate interaction influenced on the forming parameters such as the angle with the xz plane, the angle with the xy plane, laser power, scan speed, powder thickness, and hatching space on the indexes like tensile strength, density, and surface roughness with linear regression equations based on multiobjective optimization to obtain the best process parameters. The study results of microstructure performance of the formed 316L parts show that the angle with the xz plane has significant effect on the experiment indexes, while the layer thickness has the greatest effect on the indexes. After stretching, the molten pools are obviously elongated and the microstructure of the formed 316L parts is composed of equiaxed crystals and columnar crystals with a grain width of 0.28–0.4 nm. The secondary growth of the dendrites is not obvious, and the crystallinity of the selective laser melting 316L parts is not as good as the standard parts, with the microstructure showing directional solidification due to grain refinement and microscopic distortion of crystals. As the fracture has dimples, it is a ductile fracture and typical plastic fracture. The hardness near the fracture is higher than that of the substrate, whilst the indexes regarding the selective laser melting parts are higher than the ASTM-A182 and ASTM-F3184-16 standards. Since the theoretical model built in this study has less error, the findings have practical engineering application value.

A Convenient Method for Calculating Internal Force of Rod for Tower Crane

2013 ◽  
Vol 853 ◽  
pp. 541-546
Author(s):  
Yuan Xue ◽  
Da Qi Wu ◽  
Bin Kou ◽  
Nian Li Lu
Keyword(s):  
Finite Element ◽  
Spatial Structure ◽  
Efficient Method ◽  
Convenient Method ◽  
Internal Force ◽  
Calculation Model ◽  
Truss Structure ◽  
The Real ◽  
Finite Element Software ◽  
Tower Crane

This paper made an assumption which considered the structure of tower crane as truss structure and equated the complex spatial structure of tower body under multi-loads to single planar truss structure. The calculation model of internal force of rods was built. The calculation formulas of four types of trellis tower mast configuration commonly used were derived. The result based on the real project given by the calculation formulas agreed with the result given by the finite element software. These explicitly expressed formulas were simple and easy to calculate by hand. An accurate and efficient method to calculate internal force of rods of tower crane was provided.

scholarly journals Study on Stability of Shield Tunnel Excavation Face in Soil-Rock Composite Stratum

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Hongtao Sui ◽  
Chao Ma ◽  
Chunquan Dai ◽  
Tingzhi Yang
Keyword(s):  
Limit Equilibrium ◽  
Three Dimensional ◽  
Earth Pressure ◽  
Calculation Model ◽  
Shield Tunnel ◽  
Support Pressure ◽  
Finite Element Software ◽  
Dimensional Finite Element ◽  
Practical Engineering ◽  
Three Dimensional Finite Element

In order to study the instability mode of shield excavation face in soil-rock composite stratum and determine the ultimate support pressure of excavation face, this paper selects two typical soil-rock composite strata and uses three-dimensional finite element software to study the failure development process of shield excavation face. Based on the principle of limit equilibrium, a calculation model of limit support pressure for soil-rock composite stratum is proposed and applied to practical engineering. It is found that the shape of “unloading loosening zone” is mainly determined by the properties of upper soil and the properties of lower rock mainly determine the scope and shape of “sliding instability zone.” With the increase of soil proportion coefficient, the ultimate bearing capacity increases nonlinearly and the growth rate decreases gradually. At the same time, the influence of overlying Earth pressure and soil cohesion cannot be ignored.

scholarly journals A Short Review on the Dynamic Characteristics of Geogrid-Reinforced Soil Retaining Walls under Cyclic Loading

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Min Geng
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Experimental Studies ◽  
Engineering Application ◽  
Retaining Walls ◽  
Short Review ◽  
Internal Force ◽  
Reinforced Soil ◽  
Research Progress ◽  
Laboratory Model

The internal force and the form of reinforced soil wall used in high-speed railway change due to the static loads of self-gravity and rail system and dynamic load of train travelling. As a kind of flexible retaining structure, the study of the dynamic characteristics of reinforced retaining walls is of great significance for its engineering application and structural analysis. In this article, recent advances in using various research methods on the dynamic characteristics of reinforced retaining walls are reviewed. Through a series of experimental studies and numerical analysis, the research progress of dynamic characteristics of reinforced retaining walls is summarized. The advantages, disadvantages, and application of various test methods are analyzed. Finally, laboratory model tests are expounded based on previous research achievements, and prospects are proposed on the development of dynamic characteristics of reinforced retaining walls.

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