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学者姓名：陈福全
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Abstract ：
The trapdoor test has been widely used to study engineering scenarios where pressure calculation methods need to be re-evaluated due to relative soil displacements. To propose a more reasonable calculation theory, over the past few decades, researchers have primarily focused on understanding soil deformation mechanisms and stress evolution on the surface of the trapdoor. However, the limited availability of experimental data has hindered the development of a universally accepted theory. In contrast, FEMs offer a powerful tool for capturing more comprehensive and precise stress-strain information. In this study, various active trapdoor models were established, each with a width of 2 m and differing burial depths, using the FEM. By integrating the ground reaction curve, the normalized stress distribution on the trapdoor was analyzed to reveal significant stages in soil stress evolution. Additionally, the Mohr-Coulomb failure criterion was applied to differentiate between sliding and failure surfaces, shedding light on the evolution trend of the failure surface. Moreover, three lines and four points were selected to monitor the evolution of principal stresses in the soil. Drawing on principles of plane strain mechanics, the distributions and evolutions of the three principal stresses were presented in the xy-plane using vector graphics. Notably, this study highlights the crucial role of the intermediate principal stress in soil arch calculation theory.
Keyword ：
Failure mechanism Failure mechanism FEM FEM Soil arching Soil arching Stress redistribution Stress redistribution Stress trajectory Stress trajectory Trapdoor Trapdoor
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| GB/T 7714 | Lai, Dao-Liang , Chen, Fu-Quan , Lv, Yan-Ping et al. Numerical Analysis of Imperceptible Mechanical Behavior in Soil Arch Evolution [J]. | INTERNATIONAL JOURNAL OF GEOMECHANICS , 2025 , 25 (1) . |
| MLA | Lai, Dao-Liang et al. "Numerical Analysis of Imperceptible Mechanical Behavior in Soil Arch Evolution" . | INTERNATIONAL JOURNAL OF GEOMECHANICS 25 . 1 (2025) . |
| APA | Lai, Dao-Liang , Chen, Fu-Quan , Lv, Yan-Ping , Kuang, Yi-Xing . Numerical Analysis of Imperceptible Mechanical Behavior in Soil Arch Evolution . | INTERNATIONAL JOURNAL OF GEOMECHANICS , 2025 , 25 (1) . |
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The settlement formula for pile-supported reinforced embankment is established by improving the elastic foundation beam method and combining the column unit method. The traditional Winkler beams is replaced by the Timoshenko beams, and the constraint of the height of fill can be neglected because the lateral friction on the pile side is considered in the column unit method. The presented method is employed to analyze a practical engineering and compared with other methods. The results are shown to be reasonable. The effects of the variation of parameters such as pile spacing (s), thickness of load transfer platform (LTP) (h) and tensile stiffness of the geosynthetic (S-r) on the pile lateral friction and the settlement of pile-supported reinforced embankment are investigated. As s/d increases, the elastic zone with lateral friction resistance becomes shorter and shorter. The plastic zones at both ends become longer and longer. The maximum settlement generally increases with the increase of s/d. When s/d <= 4, the maximum settlement increases little, but when s/d > 4, the maximum settlement increases large, and the rate is 4 similar to 5 times of s/d <= 4. With the increase of h/s, the length of elastic zone due to pile side friction changes little, but the whole zone shifts upwards. The maximum settlement shows an obvious gradient increase. When h/s = 0.5 the maximum settlement is about 1.5 times of h/s = 0.3 maximum settlement. With the increase of S-r, the whole elastic zone of pile side resistance becomes shorter and shifts upwards. The maximum settlement decreases in a gradient way. The settlement at S-r = 4000 is about 0.75 times of that at S-r = 1000. This paper expands the settlement theory of reinforced embankment and is closer to the real conditions, which has certain scientific significance and application value.
Keyword ：
Column element Column element Elastic foundation beam Elastic foundation beam Embankment Embankment Lateral friction Lateral friction Settlement Settlement
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| GB/T 7714 | Xiong, Chuanxiang , Guo, Zhaoxin , Xing, Zhiquan et al. An analytical solution for settlement of pile-supported reinforced low embankment considering lateral friction along pile shaft [J]. | TRANSPORTATION GEOTECHNICS , 2025 , 50 . |
| MLA | Xiong, Chuanxiang et al. "An analytical solution for settlement of pile-supported reinforced low embankment considering lateral friction along pile shaft" . | TRANSPORTATION GEOTECHNICS 50 (2025) . |
| APA | Xiong, Chuanxiang , Guo, Zhaoxin , Xing, Zhiquan , Zheng, Jinhuo , Liu, Peng , Chen, Fuquan et al. An analytical solution for settlement of pile-supported reinforced low embankment considering lateral friction along pile shaft . | TRANSPORTATION GEOTECHNICS , 2025 , 50 . |
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This study develops an analytical model to determine the settlement of a composite system involving a pavement structure resting on a geosynthetic-reinforced embankment overlying voids. In the model, the pavement structure is postulated as an Euler-Bernoulli beam on a continuous elastic foundation, and the geosynthetic-reinforced embankment is idealized as an Euler-Bernoulli beam spanning voids. The Winkler foundation model is revised to simulate the absence of the voids under the geosynthetic-reinforced layer, and the corresponding equations and solutions for the composite system subjected to uniform loading are derived. The proposed solution is validated against the existing theoretical methods of a dual-beam on a continuous foundation without voids. The results indicate that the existence of underlying voids has a great impact on the settlements of a composite system involving a pavement structure resting on a geosynthetic-reinforced embankment. The proposed analytical model can provide a theoretical insight into a preliminary design of a geosynthetic-reinforced embankment overlying voids.
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| GB/T 7714 | Zhang, Bing-Qiang , Li, Jia-Yao , Chen, Fu-Quan et al. Analytical Solutions for Settlements of a Pavement Structure on Geosynthetic-Reinforced Embankments Overlying Voids [J]. | SOIL MECHANICS AND FOUNDATION ENGINEERING , 2025 . |
| MLA | Zhang, Bing-Qiang et al. "Analytical Solutions for Settlements of a Pavement Structure on Geosynthetic-Reinforced Embankments Overlying Voids" . | SOIL MECHANICS AND FOUNDATION ENGINEERING (2025) . |
| APA | Zhang, Bing-Qiang , Li, Jia-Yao , Chen, Fu-Quan , Pan, Qin-Feng , Liu, Hai . Analytical Solutions for Settlements of a Pavement Structure on Geosynthetic-Reinforced Embankments Overlying Voids . | SOIL MECHANICS AND FOUNDATION ENGINEERING , 2025 . |
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This study addresses the issue of localized ground subsidence and its effect on buried pipelines. Timoshenko beam model, placed on a Pasternak foundation, is used to analyze the internal force response of buried pipelines under foundation subsidence. The load on the pipeline, resulting from localized ground subsidence, is assumed to be symmetric. The load distribution on the buried section of the pipeline is represented using a McLaurin series. Analytical solutions for the deflection and bending moment of the pipeline under arbitrary symmetrical loading are derived based on the theory of elastic foundation beams. Additionally, the accuracy of the analytical solutions is verified through comparisons with experimental studies, finite element analysis, and existing theories. In the analysis, the shear modulus of the Timoshenko beam is set to infinity, resulting in the degeneration of the model into the Euler-Bernoulli beam. The effect of the shear modulus and diameter-span ratio (D/l) of the Timoshenko beam is investigated in the parameter analysis, and the applicability for both beam models is determined. The results indicate that, for buried pipelines with a diameter-span ratio greater than 0.1, the Timoshenko beam model provides more accurate deflection calculations than the Euler-Bernoulli beam model. © Korean Society of Civil Engineers 2024.
Keyword ：
Deflection Deflection Elastic foundation beam Elastic foundation beam Ground subsidence Ground subsidence Pipeline Pipeline Timoshenko beam Timoshenko beam
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| GB/T 7714 | Guo, F.-C. , Lv, Y.-P. , Chen, F.-Q. et al. Analytical Method for the Buried Pipeline on an Elastic Foundation with Local Ground Subsidence [J]. | KSCE Journal of Civil Engineering , 2024 , 28 (11) : 5004-5016 . |
| MLA | Guo, F.-C. et al. "Analytical Method for the Buried Pipeline on an Elastic Foundation with Local Ground Subsidence" . | KSCE Journal of Civil Engineering 28 . 11 (2024) : 5004-5016 . |
| APA | Guo, F.-C. , Lv, Y.-P. , Chen, F.-Q. , Lai, D.-L. . Analytical Method for the Buried Pipeline on an Elastic Foundation with Local Ground Subsidence . | KSCE Journal of Civil Engineering , 2024 , 28 (11) , 5004-5016 . |
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The failure mode of the soil behind the rigid support structure of excavations parallel to tunneling was simulated using the adaptive finite-element limit analysis method. This study showed the effects of tunnel diameter, tunnel construction clear spacing, excavation insertion ratio, and soil strength on the failure mode of the soil. Based on the simulated results obtained from finite-element software, a stress field was constructed for the portion above the horizontal plane at the bottom of the excavation support structure. Three types of boundary value problems were solved based on different regional divisions. Eventually, the stress state at any point within the plastic zone was calculated, providing the active earth pressure on the support structure adjacent to the tunnel during its construction. A comparison between the stress characteristic method calculation results and the finite-element simulation results showed consistency, confirming the efficiency and accuracy of the stress characteristic method in calculating the earth pressure on the support structure of excavations parallel to tunneling. © 2024 American Society of Civil Engineers.
Keyword ：
Earth pressure Earth pressure Excavation support structure Excavation support structure Plastic zone Plastic zone Stress characteristic method Stress characteristic method Tunnel construction Tunnel construction
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| GB/T 7714 | Chen, C. , Lv, Y.-P. , Li, X.-J. et al. Active Earth Pressure on the Rigid Support Structures of Excavations Parallel to Tunnel Construction [J]. | International Journal of Geomechanics , 2024 , 24 (8) . |
| MLA | Chen, C. et al. "Active Earth Pressure on the Rigid Support Structures of Excavations Parallel to Tunnel Construction" . | International Journal of Geomechanics 24 . 8 (2024) . |
| APA | Chen, C. , Lv, Y.-P. , Li, X.-J. , Chen, F.-Q. . Active Earth Pressure on the Rigid Support Structures of Excavations Parallel to Tunnel Construction . | International Journal of Geomechanics , 2024 , 24 (8) . |
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Abstract ：
Over-/under-break excavation is a common phenomenon in shallow tunnelling, which is nonetheless not generally considered in existing complex variable solutions. In this paper, a new equilibrium mechanical model on over-/under-break shallow tunnelling in gravitational geomaterial is established by fixing far-field ground surface to form a corresponding mixed boundary problem. With integration of a newly proposed bidirectional composite conformal mapping using Charge Simulation Method, a complex variable solution of infinite complex potential series is subsequently derived using analytic continuation to transform the mixed boundaries into a homogenerous Riemann–Hilbert problem, which is iteratively solved to obtain the stress and displacement in geomaterial. The infinite complex potential series of the complex variable solution are truncated to obtain numerical results, which is rectified by Lanczos filtering to reduce the oscillation of Gibbs phenomena. The bidirectional conformal mapping is discussed and validated via several numerical cases, and the subsequent complex variable solution is verified by examining the Lanczos filtering and solution convergence, and comparing with corresponding finite element solution and existing analytical solutions. Parametric investigation is conducted to illustrate possible usage of the proposed analytical solution. Further discussions are made to disclose possible defects of the proposed solution for objectivity. © 2024 Elsevier Ltd
Keyword ：
Conformal mapping Conformal mapping Iterative methods Iterative methods Tunneling (excavation) Tunneling (excavation)
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| GB/T 7714 | Lin, Luo-bin , Chen, Fu-quan , Zhuang, Jin-ping . Complex variable solution on over-/under-break shallow tunnelling in gravitational geomaterial with reasonable far-field displacement [J]. | Computers and Geotechnics , 2024 , 174 . |
| MLA | Lin, Luo-bin et al. "Complex variable solution on over-/under-break shallow tunnelling in gravitational geomaterial with reasonable far-field displacement" . | Computers and Geotechnics 174 (2024) . |
| APA | Lin, Luo-bin , Chen, Fu-quan , Zhuang, Jin-ping . Complex variable solution on over-/under-break shallow tunnelling in gravitational geomaterial with reasonable far-field displacement . | Computers and Geotechnics , 2024 , 174 . |
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CPTu (piezocone penetration test) is widely used in engineering practice to determine various parameters of clays under partially drained conditions. However, most existing research is based on undrained or fully drained conditions for clays, leading to underestimation or overestimation of soil strength. By applying the Eulerian-Lagrangian large deformation finite element method to analyse the water-soil interaction, the CPTu driving mechanism in offshore saturated soft clays under different drainage conditions is revealed. An advanced hypoplastic constitutive model for clays is used to simulate the nonlinear behaviour of kaolin under different drainage conditions. The generation, accumulation, and dissipation of excess pore water pressure under different drainage conditions are analysed, as well as the influence of excess pore water pressure on cone tip resistance and the effective stress of the soil during the CPTu penetration process. © 2024 Informa UK Limited, trading as Taylor & Francis Group.
Keyword ：
Large deformation finite element analysis Large deformation finite element analysis normalised permeability normalised permeability partially drained partially drained piezocone penetration test piezocone penetration test water-soil interaction water-soil interaction
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| GB/T 7714 | Chen, C. , Liu, L.-Y. , Chen, F.-Q. et al. Influence of drainage conditions on piezocone penetration mechanism in offshore clays [J]. | Ships and Offshore Structures , 2024 . |
| MLA | Chen, C. et al. "Influence of drainage conditions on piezocone penetration mechanism in offshore clays" . | Ships and Offshore Structures (2024) . |
| APA | Chen, C. , Liu, L.-Y. , Chen, F.-Q. , Chen, H.-B. . Influence of drainage conditions on piezocone penetration mechanism in offshore clays . | Ships and Offshore Structures , 2024 . |
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Mountainous regions are often characterized by the presence of V-shaped gullies, necessitating the construction of retaining structures to support the embankments spanning across these gullies. The gully topography renders conventional two-dimensional soil pressure calculation theory unable to meet the stability requirements for the design of retaining walls (RWs) in mountainous gullies. To address this issue, the sliding bodies of V-shaped gully retaining walls have been identified as high-wall type and low-wall type, and the spatial earth pressure of V-shaped RWs has been determined using the horizontal differential layer method. Combined with numerical simulation, a systematic parametric study is conducted to reveal the impact of the fill-soil internal friction angle, wall-soil contact surface roughness, wall height-to-width ratio, and valley side-slope angle on the active earth pressure acting on the wall. The magnitude of internal friction angle of the fill and the side-bank angle significantly influence the horizontal earth pressure. However, for RWs with finite length along their longitudinal direction, the active earth pressure value at the wall ends is significantly lower than values computed under two-dimensional plane-strain conditions. Moreover, the resultant active force point is located in the range of H/3-H/2 from the wall bottom, where H = wall height, which shows that considering three-dimensional effects is significant. © 2024 American Society of Civil Engineers.
Keyword ：
Spatial earth pressure Spatial earth pressure Translational mode Translational mode V-shaped retaining wall V-shaped retaining wall V-shaped valley V-shaped valley
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| GB/T 7714 | Que, Y. , Zhang, J. , Xie, Z. et al. Spatial Earth Pressure Analysis of V-Shaped Gully Shoulder Retaining Wall under Translational Mode [J]. | International Journal of Geomechanics , 2024 , 24 (10) . |
| MLA | Que, Y. et al. "Spatial Earth Pressure Analysis of V-Shaped Gully Shoulder Retaining Wall under Translational Mode" . | International Journal of Geomechanics 24 . 10 (2024) . |
| APA | Que, Y. , Zhang, J. , Xie, Z. , Chen, F. . Spatial Earth Pressure Analysis of V-Shaped Gully Shoulder Retaining Wall under Translational Mode . | International Journal of Geomechanics , 2024 , 24 (10) . |
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Due to a large number of uncertainties in the excavation process of the foundation pit, the real-time deformation reliability analysis and prediction of its supporting structure can not be carried out according to the changes of the site environment in the design stage.The distribution range of enclosure structures is large, and the failure location is unpredictable. Due to the limitation of the number of monitoring points, the engineering monitoring data cannot directly reflect the continuous change of the retaining structures. Based on the method of up-crossing rate, was proposed for deep foundation pit engineering with an underground diaphragm wall.An adaptive exponential smoothing model is established by using MATLAB to automatically calculate and predict the lateral deformation of the deep foundation pit retaining structure at different depths.By comparing the measured and predicted lateral deformation data, the results show that the self-adaptive exponential smoothing model has the characteristics of higher accuracy and smaller error fluctuation in short-term field prediction, the transcendental probability analysis based on the prediction data shows that the analysis model based on the lateral deformation of deep foundation pit is also applicable to the measured data obtained by the self-adaptive exponential smoothing method, and the analysis accuracy will be improved as the displacement limit is far away from the allowed displacement.The inverse distance weighted interpolation method based on ellipse search mode solves the defect that the sample points are distributed in the depth direction, which makes the interpolation result smoother.Combined with the analysis model based on the lateral deformation of the deep foundation pit, the deformation prediction of the spatial surface of the retaining structure is performed, which makes the evaluation method more intuitive and concise. © 2024 Editorial Board of Journal of Basic Science and Engineering. All rights reserved.
Keyword ：
adaptive exponential smoothing model adaptive exponential smoothing model deep foundation pit deep foundation pit deformation prediction deformation prediction diaphragm wall diaphragm wall lateral deformation lateral deformation up-crossing rate method up-crossing rate method
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| GB/T 7714 | Xu, L. , Lin, X. , Xu, Y. et al. Prediction of Lateral Deformation of Diaphragm Wall Support Structures in the Deep Foundation Pit by Using Improved Exponential Smoothing Method; [深基坑地下连续墙支护结构侧向变形的改进指数平滑法预测] [J]. | Journal of Basic Science and Engineering , 2024 , 32 (4) : 1094-1107 . |
| MLA | Xu, L. et al. "Prediction of Lateral Deformation of Diaphragm Wall Support Structures in the Deep Foundation Pit by Using Improved Exponential Smoothing Method; [深基坑地下连续墙支护结构侧向变形的改进指数平滑法预测]" . | Journal of Basic Science and Engineering 32 . 4 (2024) : 1094-1107 . |
| APA | Xu, L. , Lin, X. , Xu, Y. , Liu, Z. , Chen, F. , Wang, C. et al. Prediction of Lateral Deformation of Diaphragm Wall Support Structures in the Deep Foundation Pit by Using Improved Exponential Smoothing Method; [深基坑地下连续墙支护结构侧向变形的改进指数平滑法预测] . | Journal of Basic Science and Engineering , 2024 , 32 (4) , 1094-1107 . |
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CPTu (piezocone penetration test) is widely used in engineering practice to determine various parameters of clays under partially drained conditions. However, most existing research is based on undrained or fully drained conditions for clays, leading to underestimation or overestimation of soil strength. By applying the Eulerian-Lagrangian large deformation finite element method to analyse the water-soil interaction, the CPTu driving mechanism in offshore saturated soft clays under different drainage conditions is revealed. An advanced hypoplastic constitutive model for clays is used to simulate the nonlinear behaviour of kaolin under different drainage conditions. The generation, accumulation, and dissipation of excess pore water pressure under different drainage conditions are analysed, as well as the influence of excess pore water pressure on cone tip resistance and the effective stress of the soil during the CPTu penetration process.
Keyword ：
Large deformation finite element analysis Large deformation finite element analysis normalised permeability normalised permeability partially drained partially drained piezocone penetration test piezocone penetration test water-soil interaction water-soil interaction
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| GB/T 7714 | Chen, Chang , Liu, Li-Yang , Chen, Fu-Quan et al. Influence of drainage conditions on piezocone penetration mechanism in offshore clays [J]. | SHIPS AND OFFSHORE STRUCTURES , 2024 . |
| MLA | Chen, Chang et al. "Influence of drainage conditions on piezocone penetration mechanism in offshore clays" . | SHIPS AND OFFSHORE STRUCTURES (2024) . |
| APA | Chen, Chang , Liu, Li-Yang , Chen, Fu-Quan , Chen, Hao-Biao . Influence of drainage conditions on piezocone penetration mechanism in offshore clays . | SHIPS AND OFFSHORE STRUCTURES , 2024 . |
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