Numerical Simulation of Spatial Synergic Interaction in the Double-Row Anti-Sliding Piles

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.

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.602-605.53 ◽

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.

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Three-dimensional numerical simulation and earth pressure analysis on double-row piles with consideration of spatial effects

Journal of Zhejiang University SCIENCE A ◽

10.1631/jzus.a1100067 ◽

2011 ◽

Vol 12 (10) ◽

pp. 758-770 ◽

Cited By ~ 3

Author(s):

Zi-han Wang ◽

Jian Zhou

Keyword(s):

Numerical Simulation ◽

Three Dimensional ◽

Earth Pressure ◽

Spatial Effects ◽

Double Row ◽

Pressure Analysis

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Failure Analysis of a Pre-Excavation Double Equipment Withdrawal Channel and Its Control Techniques

Energies ◽

10.3390/en13236368 ◽

2020 ◽

Vol 13 (23) ◽

pp. 6368

Author(s):

Chen Li ◽

Xiaofei Guo ◽

Xiaoyong Lian ◽

Nianjie Ma

Keyword(s):

Numerical Simulation ◽

Failure Modes ◽

Abutment Pressure ◽

Dynamic Pressure ◽

Stability Control ◽

Field Application ◽

Surrounding Rock ◽

Control Technique ◽

Mining Equipment ◽

Double Row

The use of pre-excavation equipment withdrawal channels (EWCs) at the stop-production line is important for the rapid withdrawal of coal mining equipment. However, during the final mining period, the dynamic pressure of a pre-excavated double EWC is severe, which leads to instability of the surrounding rock around the EWCs. Therefore, in this paper, the methods of field monitoring, theoretical analysis, and numerical simulation were used to systematically study the stress and plastic zone evolution of a double EWC during the final mining period. Firstly, the distribution characteristics of mining abutment pressure and roadway failure modes under the action of mining abutment pressure were analyzed theoretically. Afterward, a FLAC3D mining numerical model was established according to the distribution of rock strata obtained from roof detection. Finally, the evolution laws of the stress fields and plastic zones of the EWCs during final mining were obtained by numerical simulation. The present study suggests that asymmetric stress distribution dominates asymmetric failure of the surrounding rock around the EWCs during the final mining period, and deformation failure within 10 m from the working face to the main EWC (MEWC) accounted for most of the roadway deformation. Based on the research results combined with actual production experience, the stability control technique of the surrounding rock with reinforcement of anchor cables and double-row buttress hydraulic support for the MEWC was put forward. After the field application, the ideal result was obtained.

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Numerical Simulation on Framed Anti-Sliding Piles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.393-395.209 ◽

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.

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