Numerical simulation of working performance for retaining structure with double-row piles

2011 ◽  
Author(s):  
Yulin Qian ◽  
Enguang Guo
Keyword(s):  
Numerical Simulation ◽  
Double Row ◽  
Retaining Structure ◽  
Working Performance

The Numericial Calculation of Retaining Structure with Double-Piles

2014 ◽  
Vol 530-531 ◽  
pp. 928-931 ◽  
Author(s):  
Ying Hui Chen ◽  
Yan Lian Pan
Keyword(s):  
Numerical Simulation ◽  
Finite Difference ◽  
Engineering Model ◽  
Foundation Pit ◽  
Double Row ◽  
Retaining Structure ◽  
Calculation Results

Combined with a foundation pit in kunming, the paper use the finite-difference software flac3d to establish engineering model and carry on the numerical simulation to simulate the excavation on the initial engineering condition of the double-row piles retaining structure. Summarize the calculation results when change the distance of the pile-rows and the length of the piles to analyze the results differences and changing law. The conclusion has some practical value in engineering.

Numerical Simulation on Framed Anti-Sliding Piles

2011 ◽  
Vol 393-395 ◽  
pp. 209-212
Author(s):  
Tong Hui Qian ◽  
Hong Xing Ding ◽  
Zhou Bing Cheng ◽  
Fang Chen
Keyword(s):  
Numerical Simulation ◽  
Single Layer ◽  
Horizontal Displacement ◽  
Force Model ◽  
Framework Structure ◽  
Double Row ◽  
Retaining Structure ◽  
Calculation Results ◽  
Soil Arch ◽  
Coordination Action

As a new bracing structure, the framed anti-sliding piless based on spatial framework structure, which have the advantages of less displacement in the top of the piles and large anti-force, are developed as a new retaining structure, and can be used to reduce the piles deformation. However, the previous calculation models of double-row piles ignored the deformation coordination action between linking beams and ring beams, the interaction between piles and beams. Further more the calculation results based on the models are not accurate enough. In this paper, a spatial force model of the framed anti-sliding piles is presented. Taking framed anti-sliding piles as a single-layer multi-span frame affected by piles, beams and soils, the spatial synergic interaction between top ring beam and linking beam, as well as the affection of soil-arch on the frame are analyzed. The horizontal displacement in front of the framed anti-sliding piles and distribution of axial force and moment of piles are studied by Finite element method. The results reflect commendably the stress and distortion character of the framed anti-sliding piles. Finally, some rules about the pile-beam-soil interaction in the pile structure are summarized.

Analysis of the Effects on Optimization Design about Double-Row Piles Retaining Structure

2012 ◽  
Vol 204-208 ◽  
pp. 72-78
Author(s):  
Yu Wang ◽  
Yan Ting Yang ◽  
Feng Yu ◽  
Guang Lei Hu
Keyword(s):  
Optimization Design ◽  
Internal Force ◽  
Composite Foundation ◽  
Foundation Pit ◽  
Double Row ◽  
Retaining Structure ◽  
Supporting Structure ◽  
Arch Effect ◽  
Space Effect ◽  
Foundation Pile

Double-row piles retaining structure has been widely used in the project now, but the stress mechanism of double-row pile is more complex; Its internal force and deformation are affected by many factors. Understanding and mastering its effects has an important significance for the design and the optimization of double-row pile supporting structure. According to the comparison of the measured data and theoretical calculation about original support scheme and optimized support plan and combined with the soil test data, this paper takes the Jinan Cultural Arts Center(Theatre) stage bin foundation pit as an example to analyse the main effects of optimization design about double-pile supporting structure. The results show that soil shear strength, soil arch effect, influence of CFG composite foundation, pile-beam synergy effect and space effect of foundation pit play an important role for optimization design about double-pile supporting structure.

Working Performance Analysis of Reinforced Gravel Cushion on Soft Subsoil

2014 ◽  
Vol 1065-1069 ◽  
pp. 89-95
Author(s):  
Jie He ◽  
Sen Song Meng ◽  
Qian Gen Rao ◽  
Ya Tao Wang ◽  
Lei Hua Tang
Keyword(s):  
Numerical Simulation ◽  
Stress Distribution ◽  
Subgrade Reaction ◽  
Working Performance ◽  
Bearing Characteristic ◽  
Settlement Distribution ◽  
Geocell Reinforcement ◽  
Soft Subsoil ◽  
Better Than ◽  
Reinforced Materials

Model tests are performed to study the working properties of reinforced and non-reinforced gravel cushion on soft subsoil. The effects are analyzed of reinforced materials on the bearing characteristic of the cushion. The stress field and settlement field are studied through the method of numerical simulation. The results show that: The bearing capacity of foundation with cushion increases significantly when the cushion is reinforced. Under the same condition, the effect of geocell reinforcement is better than geogrid reinforcement. The value of coefficient of subgrade reaction increases when the cushion is reinforced. The reinforced materials can adjust the stress distribution and settlement distribution of the cushion.

scholarly journals Effect of the structure of backward orifices on the jet performance of self-propelled nozzles

2020 ◽  
Author(s):  
Bi-Wei Fu ◽  
Si Zhang ◽  
Shao-Hu Liu
Keyword(s):  
Numerical Simulation ◽  
Energy Efficiency ◽  
Structural Parameters ◽  
Critical Component ◽  
Propulsive Force ◽  
Drilling Performance ◽  
Drilling Technology ◽  
Value Range ◽  
Energy Coefficient ◽  
Working Performance

Abstract Self-propelled nozzle is a critical component of the radial jet drilling technology. Its backward orifice structure has a crucial influence on the propulsive force and the drilling performance. To improve the working performance of the nozzle, the numerical simulation model is built and verified by the experimental results of propulsive force. Then the theoretical model of the energy efficiency and energy coefficient of the nozzle is built to reveal the influence of the structural parameters on the jet performance of the nozzle. The results show that the energy efficiency and energy coefficient of the backward orifice increase first and then decrease with the angle increases. The energy coefficient of forward orifice is almost constant with the angle increases. With the increase in the number and diameter, energy efficiency and energy coefficient of the forward orifice gradually decrease, but the backward orifice energy coefficient first increases and then decreases. Finally, it is obtained that the nozzle has better jet performance when the angle of backward orifice is 30°, the number of backward orifice is 6, and the value range of diameter is 2–2.2 mm. This study provides a reference for the design of efficiently self-propelled nozzle for radial jet drilling technology.

Monitoring and Numerical Simulation of the Supporting of the Inverted Side Wall Shaft

2013 ◽  
Vol 671-674 ◽  
pp. 69-75
Author(s):  
Ai Jun Yao ◽  
Chao Mei ◽  
Huan Fang Chen
Keyword(s):  
Numerical Simulation ◽  
Surface Deformation ◽  
Ground Surface ◽  
Side Wall ◽  
Monitoring Data ◽  
Retaining Structure ◽  
Site Monitoring ◽  
Excavation Process ◽  
Ground Surface Settlement ◽  
3D Software

Base on the shaft construction of a subway station in Changchun, make a detailed analysis of the site monitoring data of the retaining structure and the ground surface settlement against the excavation process of the inverted side wall shaft. By using the FLAC-3D software of finite difference, the numerical simulation are conducted, thus, make a comparison with the site monitoring data, and summarize the deformation characteristics of the retaining structure and the surface deformation of the inverted side wall shaft during the excavation. Results show that the support of the inverted side wall shaft which adopting alternation excavation and supporting while excavating has good stability, and the monitoring result is close to the numerical simulation’s, which provides the basis for the success of the engineering.The research results can be references for other similar designs and constructions.

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.

Sign in / Sign up

Export Citation Format

Share Document