The Anti sliding Mechanism of Adjacent Pile‐Anchor Structure considering Traffic Load on Slope Top

Li, Danfeng; Zhang, Zhuojie

doi:10.1155/2021/6615224

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…A square roadbed soil model with dimensions of 1.0 m × 1.0 m × 1.0 m is constructed. The centre point of the top surface of the roadbed is at the centre of the PFWD bearing plate, and the impact load model is a half-cycle sine curve 32 – 34 . The drop height is 3/4, the time history of the load is 25 ms, and the diameter of the bearing plate is d = 30 cm.…”

Section: Spatial Distribution Of Dynamic Stress Of Roadbed Soil Under...mentioning

confidence: 99%

Improved measurement method for roadbed bearing capacity based on PFWD dynamic modulus control

Zhang

2023

Sci Rep

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To address current challenges of difficult standardisation of dynamic determination of roadbed bearing capacity and excessive deviations in deflection control, this paper proposes a improved measurement method for roadbed load-bearing capacity based on the dynamic modulus control using a portable falling weight deflectometer (PFWD). The detection range of PFWD is determined by theoretical analysis. Based on the range, a finite element numerical model was developed, the spatial distribution and attenuation of the dynamic stress of the roadbed soil in the depth and horizontal directions are determined. The variation of the vertical dynamic stress with depth is not characterized by a gradual decrease, as is commonly believed, but rather by an increase followed by a decrease. The underlying reasons for the difference between static and dynamic indicators are explored. Using the improved method, a prediction model with dynamic bending as the detection index and static rebound modulus as the control index was developed. The proposed model can improve precision accuracy as well as detection efficiency, verify the effectiveness of the improved method, which is important for accurate dynamic measurement and evaluation of highway roadbed bearing capacity.

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Section: Spatial Distribution Of Dynamic Stress Of Roadbed Soil Under...mentioning

confidence: 99%

Improved measurement method for roadbed bearing capacity based on PFWD dynamic modulus control

Zhang

2023

Sci Rep

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“…Numerical simulations offer an economical and reliable approach for analyzing the behaviors of reinforced slopes [15][16][17], including the finite element method (FEM), the finite difference method (FDM), mesh-free methods [18][19][20][21][22], and artificial intelligence methods [23][24][25][26][27][28][29][30][31][32]. Among these methods, the FEM and the FDM are the most widely used.…”

Section: Introductionmentioning

confidence: 99%

Research on the Dynamic Response of a Slope Reinforced by a Pile-Anchor Structure under Seismic Loading

Li,

Chu,

Zhang

et al. 2023

Buildings

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In earthquake-prone areas, pile-anchor structures are widely employed for slope reinforcement due to their reliable performance. Current research has primarily focused on static and quasi-static analyses of slopes reinforced by using pile-anchor structures, with limited investigation into their dynamic response. In this work, the finite element method (FEM) is used to study the dynamic behavior of a pile-anchor slope system, and the extended finite element method (XFEM) is used to simulate the progressive failure processes of piles. Three different reinforcement schemes, which include no support, pile support, and pile-anchor support, are considered to examine the performance of the pile-anchor structure. The simulation results suggest that the pile-anchor structure displays a reduction of 39.6% and 40.6% in the maximum shear force and bending moment of the piles, respectively, compared to the pile structure. The XFEM is utilized to model the progressive failure process of the piles subjected to seismic loading. We find that crack initiation in the pile body near the slip surface, for both the pile supported and the pile-anchor supported conditions, occurs when the peak ground acceleration arrives. Crack growth in the piles completes in a very short period, with two distinct increments of crack area observed. The first increment occurs when the peak ground acceleration arrives and is significantly larger than the second increment. Consequently, for the seismic design of piles, it is necessary to strengthen the pile body around slip surfaces. The novelty of this paper is that we realize the simulation of crack initiation and propagation in piles subjected to seismic loading.

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“…Gischig et al [ 13 ] obtained that the amplification coefficient of slope frequency is highly sensitive to the change of cracks by using the numerical simulation method. For other retaining structures, such as the pile-anchor structure, micro-pile and so on, the time-frequency domain analysis based on slope acceleration has also become a means of analyzing slope dynamic response [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Seismic Response Evaluation of High-Steep Slopes Supported by Anti-Slide Piles with Different Initial Damage Based on Shaking Table Test

et al. 2022

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In order to study the instability development process of the slope reinforced by anti-slide piles under earthquake conditions, the dynamic response characteristics of the slope are usually taken as the main characteristics, and the model test and numerical simulation are the main research methods. In this paper, a shaking table model test is designed and completed to investigate the influence of anti-slide piles with different initial damage on the failure mode of high and steep slope under earthquake conditions. The changes in velocity, strain and natural frequency during slope vibration are tested in combination with cloud maps when sinusoidal waves of different accelerations with a peak value of 5 Hz are applied. Thus, the differences of slope failure development process and dynamic response characteristics are obtained. The experimental results show that the anti-slide pile with different initial damage has obvious influence on the slope instability process. Under the condition of good anti-slide pile quality, the failure development of the slope behind the pile is limited to soil sliding on top of the slope, slope sliding and overburden sliding; the front slope foot of pile mainly forms shear belt and local sliding. With the decrease in the initial mass of the anti-slide pile, the slope failure develops into topsoil sliding, slope sliding and deep integral sliding; analogously, the failure of the slope in front of the pile develops into a whole slip along the slip belt. The natural frequency cloud map can directly reflect the damage location of the slope, and the frequency change rate is positively correlated with the cumulative shear strain. It shows that the macro-failure characteristics of the model slope change well when the natural frequency is used as the sensitive index to measure the influence of vibration on the model slope. The threshold value of the natural frequency change rate can distinguish different development stages of the slope; 1% is the threshold value of stage II, and 1.5% is the threshold value of stage III.

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The Anti sliding Mechanism of Adjacent Pile‐Anchor Structure considering Traffic Load on Slope Top

Cited by 6 publications

References 16 publications

Improved measurement method for roadbed bearing capacity based on PFWD dynamic modulus control

Improved measurement method for roadbed bearing capacity based on PFWD dynamic modulus control

Research on the Dynamic Response of a Slope Reinforced by a Pile-Anchor Structure under Seismic Loading

Seismic Response Evaluation of High-Steep Slopes Supported by Anti-Slide Piles with Different Initial Damage Based on Shaking Table Test

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