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Abstract ：
The lateral displacement of deep soft soil caused by large-area heap loading is a common issue in engineering practice, which affects the stability of neighboring pile foundations. This study investigates the calculation of thrust force exerted by the flow of soft soil around piles and its impact on pile foundations. The surrounding soft soil is considered a Bingham fluid. An analytical formula for single pile flow drag during the internal slip of deep soft soil is derived based on fluid mechanics theory and the fluid characteristics of the Bingham fluid. The traditional cantilever pile approach is modified by assuming a rectangular distribution of flow drag along the pile body and using the matrix transfer method. The response of a single pile body under field heap loading conditions is then analyzed, and the results are compared with the calculation results of the traditional soil pressure method and field-measured data to validate the proposed calculation method for flow drag around a pile in soft soil. Finally, a parametric study is conducted to analyze the effects of the relative flow velocity and dynamic viscous coefficient of soft soil on flow drag.
Keyword ：
Bingham fluid Bingham fluid Flow drag Flow drag Large-area heap loading Large-area heap loading Pile Pile Soft soil Soft soil
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| GB/T 7714 | Wu, Min , Zheng, Jiayong , Liu, Qijian et al. Calculation method of flow drag around a pile in soft soil considering Bingham fluid properties and analysis of single pile response [J]. | OCEAN ENGINEERING , 2025 , 317 . |
| MLA | Wu, Min et al. "Calculation method of flow drag around a pile in soft soil considering Bingham fluid properties and analysis of single pile response" . | OCEAN ENGINEERING 317 (2025) . |
| APA | Wu, Min , Zheng, Jiayong , Liu, Qijian , Zheng, Lu , Deng, Tao . Calculation method of flow drag around a pile in soft soil considering Bingham fluid properties and analysis of single pile response . | OCEAN ENGINEERING , 2025 , 317 . |
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煤炭开挖和选煤过程中产生大量煤矸石,堆积于地表的煤矸石易受到环境的影响引发灾害.目前,干湿循环条件下煤矸石土石混合体的强度特性研究较少.通过大型直剪试验,探究干湿循环和含石量对煤矸石土石混合体强度特性的作用机制;揭示含石量(RP)和干湿循环次数对土石混合体积变化及相对破碎率(rB)的影响规律;建立干湿循环下土石混合体抗剪强度劣化方程.试验结果表明,随着含石量的提高,煤矸石土石混合体的内摩擦角呈现线性增加,而黏聚力则呈现出下降趋势;煤矸石土石混合体在剪切过程中呈现明显的剪切收缩现象;煤矸石土石混合体的剪切强度和法向应变最大值随着含石量的增加而增加,并随着干湿循环次数的增加而减小.首次干湿循环对土石混合体的抗剪强度劣化作用显著,3 次干湿循环后土石混合体抗剪强度变化不明显;干湿循环加剧了土石混合体中岩块的破碎趋势,提高岩块的 rB,导致土壤颗粒含量(粒径＜5 mm)增加.高法向应力下(nσ=800 kPa),rB 随干湿循环次数增加而提高,而低法向应力下(nσ=200 kPa)干湿循环对岩块破碎影响有限.
Keyword ：
剪切强度 剪切强度 土石混合体 土石混合体 岩石力学 岩石力学 干湿循环 干湿循环 煤矸石 煤矸石 相对破碎率 相对破碎率
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| GB/T 7714 | 刘红位 , 游诗琪 , 简文彬 et al. 干湿循环下煤矸石土石混合体大型直剪试验研究 [J]. | 岩石力学与工程学报 , 2025 , 44 (2) : 331-341 . |
| MLA | 刘红位 et al. "干湿循环下煤矸石土石混合体大型直剪试验研究" . | 岩石力学与工程学报 44 . 2 (2025) : 331-341 . |
| APA | 刘红位 , 游诗琪 , 简文彬 , 黄云 , 冯嵩 , 邓涛 . 干湿循环下煤矸石土石混合体大型直剪试验研究 . | 岩石力学与工程学报 , 2025 , 44 (2) , 331-341 . |
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An analytical model has been developed to investigate the vertical dynamic response of single end-bearing SDCM piles with partially treated DCM socket. The interaction between the cored pile, the surrounding socket and untreated soil is described using elastodynamics. To evaluate the response of the cored pile, the model is divided into two regions within the DCM and outside the DCM region. The eigenfunctions and eigenvalues for the pile displacement in these two regions are derived. The displacement of the cored pile is obtained in matrix form by finite truncation of the Fourier series. Parametric studies show that the axial strain of the cored pile increases along the shaft depth due to the occurrence of negative skin friction. Pile stiffness increases significantly with the increase of the radius of the DCM socket. The feasible radius r 1 / d for effectively increasing pile stiffness is 5 similar to 10. The depth of the DCM socket also has a significant impact on the response of the cored pile.
Keyword ：
Composite piles Composite piles Partially treated soils Partially treated soils Pile head stiffness Pile head stiffness Vertical vibration Vertical vibration
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| GB/T 7714 | Deng, Tao , Liu, Qijian , Lin, Congyu . Analytical solution for vertical vibrations of single end-bearing SDCM piles in partially treated soil [J]. | COMPUTERS AND GEOTECHNICS , 2025 , 179 . |
| MLA | Deng, Tao et al. "Analytical solution for vertical vibrations of single end-bearing SDCM piles in partially treated soil" . | COMPUTERS AND GEOTECHNICS 179 (2025) . |
| APA | Deng, Tao , Liu, Qijian , Lin, Congyu . Analytical solution for vertical vibrations of single end-bearing SDCM piles in partially treated soil . | COMPUTERS AND GEOTECHNICS , 2025 , 179 . |
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When applying the three-dimensional discontinuous deformation analysis (3D-DDA) method to simulate the dynamic response of rock mass in an earthquake, appropriate artificial boundaries and input methods should be considered. In this study, the 3D-DDA method was modified by introducing the viscoelastic artificial boundary and the seismic motion input method based on the wave field decomposition method and with the consideration of the lateral free-field wave. Subsequently, the correctness of the boundary and the input method was verified through numerical examples. The results of the numerical examples were almost consistent with the theoretical solution. The introduced viscoelastic artificial boundary and seismic motion input method improved the applicability of the 3D-DDA method and can be further applied to simulate actual engineering cases. Viscoelastic artificial boundary is applied and validated in 3D-DDA.The differences between viscoelastic boundary and existing boundaries are compared.Modified 3D-DDA can consider wave field decomposition and lateral free-field wave for seismic motion input.Feasibility of modified 3D-DDA to study the dynamic response of rock mass in an earthquake is studied.
Keyword ：
Artificial boundary Artificial boundary Seismic motion input methods Seismic motion input methods Three-dimensional discontinuous deformation analysis method Three-dimensional discontinuous deformation analysis method Viscoelastic boundary Viscoelastic boundary
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| GB/T 7714 | Lin, Si-huang , Deng, Tao , Zheng, Lu et al. Implementation of Viscoelastic Artificial Boundary and Seismic Motion Input Method in Three-Dimensional Discontinuous Deformation Analysis Method [J]. | ROCK MECHANICS AND ROCK ENGINEERING , 2024 , 57 (7) : 4995-5015 . |
| MLA | Lin, Si-huang et al. "Implementation of Viscoelastic Artificial Boundary and Seismic Motion Input Method in Three-Dimensional Discontinuous Deformation Analysis Method" . | ROCK MECHANICS AND ROCK ENGINEERING 57 . 7 (2024) : 4995-5015 . |
| APA | Lin, Si-huang , Deng, Tao , Zheng, Lu , Zhang, Hong , Wu, Wei , Fu, Xiao-dong et al. Implementation of Viscoelastic Artificial Boundary and Seismic Motion Input Method in Three-Dimensional Discontinuous Deformation Analysis Method . | ROCK MECHANICS AND ROCK ENGINEERING , 2024 , 57 (7) , 4995-5015 . |
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Shield misalignment is a common problem in shield tunnels, which seriously affects the safety and durability of tunnels. However, at present, there is a lack of research on the influence of shield misalignment on the shear capacity of the circumferential joint structure, and the failure mechanism of the circumferential joint structure before and after reinforcement is not clear. Therefore, this paper simulates the influence of misalignment on the performance mechanism of segmented circumferential connection and the effect of channel reinforcement on the ABAQUS platform. The simulation results are compared with the full-scale test results, and the results show that the shear failure process of the circumferential joint can be divided into three stages under the condition of no reinforcement. In the first stage, the vertical load increases, but the misalignment between the shield tunneling sections is very small. In the second stage, the load almost does not increase, but the degree of misalignment increases. In the third stage, the load-displacement relationship is nonlinear, indicating that the bending bolt has been sheared. Under the condition of unreinforced, the bolt will form two plastic hinges when it fails. After reinforcing the channel, the removal of the bolt forms only one plastic hinge. After channel steel reinforcement, the boundary area between the channel steel web and the steel plate first reaches the ultimate tensile strength of the steel plate, and the failure mode becomes channel steel reinforcement failure. Under the same shear load, the misalignment of the circumferential joint reinforced with channel steel is reduced. In this paper, the misalignment relationship of shear load and the yield of the bending bolt obtained through numerical calculation is consistent with the conclusion of the full-scale test. However, the circumferential connection misalignment obtained via numerical calculation is relatively small. The yield position of the bending bolt is also in good agreement with the test results, and the bolt strain obtained through the test is relatively small.
Keyword ：
channel reinforcement channel reinforcement circumferential joints circumferential joints full-scale test full-scale test misalignment misalignment shield tunneling segments shield tunneling segments
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| GB/T 7714 | Su, Hang , Deng, Tao , Yang, Zengquan et al. Characterization of Shear Damage and Channel Reinforcement of Circumferential Joints between Shield Tunneling Segments Based on Numerical Simulation [J]. | BUILDINGS , 2024 , 14 (2) . |
| MLA | Su, Hang et al. "Characterization of Shear Damage and Channel Reinforcement of Circumferential Joints between Shield Tunneling Segments Based on Numerical Simulation" . | BUILDINGS 14 . 2 (2024) . |
| APA | Su, Hang , Deng, Tao , Yang, Zengquan , Qin, Jianpeng , Zheng, Lu . Characterization of Shear Damage and Channel Reinforcement of Circumferential Joints between Shield Tunneling Segments Based on Numerical Simulation . | BUILDINGS , 2024 , 14 (2) . |
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A rigorous solution for the kinematic response of the disconnected piles under vertically incident P-waves is presented. A new soil-pile column model is proposed with two fictitious soil columns as the extensions of the shaft along the pile top and tip. The discontinuity of the pile at the two ends is modeled using the Heaviside function to simulate the continuity of the soil-pile column. The total displacement of the soil is divided into the free-field and scattered components. The displacement of the soil-pile system is calculated in terms of the method of separation of variables and the soil-pile interaction. A parametric study indicates that for the disconnected pile, the displacement at the pile top increases significantly with the increase of the cushion thickness, and its effect on the scattered field is weak. The axial force of the disconnected pile decreases gradually with the increase of the cushion thickness. The displacement and axial force of the disconnected pile are significantly influenced by the slenderness ratio of the pile.
Keyword ：
Disconnected pile Disconnected pile fictitious soil-pile column fictitious soil-pile column kinematic response kinematic response the soil-pile interaction the soil-pile interaction vertically incident P-waves vertically incident P-waves
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| GB/T 7714 | Hu, Chenglong , Liu, Qijian , Deng, Tao et al. Rigorous Solution for the Kinematic Response of Single Disconnected Piles Subjected to Vertically Incident P-Waves [J]. | JOURNAL OF EARTHQUAKE AND TSUNAMI , 2024 , 18 (04) . |
| MLA | Hu, Chenglong et al. "Rigorous Solution for the Kinematic Response of Single Disconnected Piles Subjected to Vertically Incident P-Waves" . | JOURNAL OF EARTHQUAKE AND TSUNAMI 18 . 04 (2024) . |
| APA | Hu, Chenglong , Liu, Qijian , Deng, Tao , Zeng, Lei . Rigorous Solution for the Kinematic Response of Single Disconnected Piles Subjected to Vertically Incident P-Waves . | JOURNAL OF EARTHQUAKE AND TSUNAMI , 2024 , 18 (04) . |
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Abstract ：
为探究深厚软土区桩梁式路堤的荷载传递机制及深层地基变形规律,对桩梁式路堤的桩梁顶和桩间土压力、分层沉降、地基侧向变形和连梁钢筋应力进行长期监测研究.结果表明:路面下桩梁顶平面处实测土压力明显大于路堤中坡下实测土压力;地基深层水平位移随深度增加且呈"鱼腹"形变化,最大侧向变形主要集中在路堤中坡下近临坡脚区域.地基分层沉降随深度迅速衰减,并于地表下6 m后逐渐趋于平稳,分层沉降的稳定具有"滞后性".连梁发生上侧受压、下侧受拉的挠曲变形,有利于桩梁式路堤整体受力.最后,将现场实测结果、现有理论和规范方法计算所得结果进行对比,表明桩梁式路堤的土拱效应比桩承式路堤更明显.
Keyword ：
变形控制 变形控制 承载特性 承载特性 桩梁式路堤 桩梁式路堤 现场试验 现场试验 软土地基 软土地基
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| GB/T 7714 | 黄奕彬 , 陶红文 , 费发樱 et al. 深厚软土区桩梁式路堤承载及变形特性现场试验研究 [J]. | 水利与建筑工程学报 , 2024 , 22 (5) : 160-167 . |
| MLA | 黄奕彬 et al. "深厚软土区桩梁式路堤承载及变形特性现场试验研究" . | 水利与建筑工程学报 22 . 5 (2024) : 160-167 . |
| APA | 黄奕彬 , 陶红文 , 费发樱 , 王嘉文 , 邓涛 . 深厚软土区桩梁式路堤承载及变形特性现场试验研究 . | 水利与建筑工程学报 , 2024 , 22 (5) , 160-167 . |
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The rockburst disaster triggered by the nonlinear large-deformation characteristics of deep rock masses has been a worldwide problem in geotechnical engineering, severely constraining construction progress and safety in engineering projects. Therefore, it is imperative to intensify in-depth research on rockburst prevention measures. Based on the principle of steel pipe compressive deformation, a novel steel pipe shrinkable energy-absorbing bolt constant-resistance large-deformation bolt was proposed, which can provide a high constant resistance while accommodating a substantial amount of deformation. Building on previous research, the impact resistance of the steel pipe shrinkable energy-absorbing bolt constant-resistance large-deformation bolt was investigated through drop hammer impact tests. The test results indicate that: during the impact process, the working resistance of the steel pipe shrinkable energy-absorbing bolt constant-resistance large-deformation bolt remains stable within the range of 150 kN to 180 kN, demonstrating notable constant-resistance characteristics; the bolt absorbs a significant amount of energy with high efficiency, capable of absorbing up to 53 kJ of impact energy in a single instance; throughout the impact, the compression rate of the specimen only decreased by 0.54% to 1.43%, indicating relatively stable deformation. The steel pipe shrinkable energy-absorbing bolt constant-resistance large-deformation bolt exhibits excellent impact resistance, providing robust technical support for the prevention and control of rockburst disasters during underground engineering construction. © 2024 Biodiversity Research Center Academia Sinica. All rights reserved.
Keyword ：
Disaster prevention Disaster prevention Disasters Disasters Geotechnical engineering Geotechnical engineering Impact testing Impact testing
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| GB/T 7714 | Zhao, Ming-Zhu , Wu, Xue-Zhen , Ye, Qing et al. Impact resistance characteristics of steel pipe shrinkable energy-absorbing bolt and its potential for rockburst mitigation and control [J]. | Rock and Soil Mechanics , 2024 , 45 (11) : 3355-3365 and 3377 . |
| MLA | Zhao, Ming-Zhu et al. "Impact resistance characteristics of steel pipe shrinkable energy-absorbing bolt and its potential for rockburst mitigation and control" . | Rock and Soil Mechanics 45 . 11 (2024) : 3355-3365 and 3377 . |
| APA | Zhao, Ming-Zhu , Wu, Xue-Zhen , Ye, Qing , Wang, Gang , Jiang, Yu-Jing , Deng, Tao . Impact resistance characteristics of steel pipe shrinkable energy-absorbing bolt and its potential for rockburst mitigation and control . | Rock and Soil Mechanics , 2024 , 45 (11) , 3355-3365 and 3377 . |
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High stress in surrounding rock will lead to serious problems,e.g.,rock burst in hard rock and large defor-mation in soft rock.The applied support system under high in-situ stress conditions should be able to carry high load and also accommodate large deformation without experiencing severe damage.In this paper,a specially designed energy-absorbing component for rock bolt and cable that can solve the above problems was proposed.The energy-absorbing component can provide support resistance by plastic deformation of the metal including constraint annulus and compression pipe.For practical engineering,two forms were proposed.One was installed in the surrounding rock by reaming,and the other was installed directly outside the surrounding rock.During the dilation of the surrounding rock,the relative displacement of constraint annulus and compression pipe occurs,resulting in deformation resistance.Deformation resistance is transmitted to the rock bolt or cable,providing support resistance.The lab test and numerical simulation showed that the energy-absorbing component can perfectly achieve the large deformation effect,the deformation amount is as high as 694 mm,and the bearing capacity is stable at 367 kN.The field application tests were carried out in the mining roadway of Xinjulong coal mine,and the results showed that the new type of cable can ensure itself not to break under the condition of large deformation of the surrounding rock.The energy-absorbing component has the superiorities of perform-ing large constant resistance and controllable deformation to effectively control the unpredictable disas-ters such as large deformation in soft rock and rock burst in hard rock encountered in deep strata.
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| GB/T 7714 | Xuezhen Wu , Mingzhu Zhao , Qing Ye et al. A new deformable cable for rock support in high stress tunnel:Steel pipe shrinkable energy-absorbing cable [J]. | 矿业科学技术学报（英文版） , 2024 , 34 (8) : 1083-1093 . |
| MLA | Xuezhen Wu et al. "A new deformable cable for rock support in high stress tunnel:Steel pipe shrinkable energy-absorbing cable" . | 矿业科学技术学报（英文版） 34 . 8 (2024) : 1083-1093 . |
| APA | Xuezhen Wu , Mingzhu Zhao , Qing Ye , Yujing Jiang , Tao Deng , Hanfang Zheng et al. A new deformable cable for rock support in high stress tunnel:Steel pipe shrinkable energy-absorbing cable . | 矿业科学技术学报（英文版） , 2024 , 34 (8) , 1083-1093 . |
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Abstract ：
High stress in surrounding rock will lead to serious problems, e.g., rock burst in hard rock and large deformation in soft rock. The applied support system under high in-situ stress conditions should be able to carry high load and also accommodate large deformation without experiencing severe damage. In this paper, a specially designed energy-absorbing component for rock bolt and cable that can solve the above problems was proposed. The energy-absorbing component can provide support resistance by plastic deformation of the metal including constraint annulus and compression pipe. For practical engineering, two forms were proposed. One was installed in the surrounding rock by reaming, and the other was installed directly outside the surrounding rock. During the dilation of the surrounding rock, the relative displacement of constraint annulus and compression pipe occurs, resulting in deformation resistance. Deformation resistance is transmitted to the rock bolt or cable, providing support resistance. The lab test and numerical simulation showed that the energy-absorbing component can perfectly achieve the large deformation effect, the deformation amount is as high as 694 mm, and the bearing capacity is stable at 367 kN. The field application tests were carried out in the mining roadway of Xinjulong coal mine, and the results showed that the new type of cable can ensure itself not to break under the condition of large deformation of the surrounding rock. The energy-absorbing component has the superiorities of performing large constant resistance and controllable deformation to effectively control the unpredictable disasters such as large deformation in soft rock and rock burst in hard rock encountered in deep strata. (c) 2024 Published by Elsevier B.V. on behalf of China University of Mining & Technology. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keyword ：
Energy-absorbing cable Energy-absorbing cable Lab test Lab test Load capacity Load capacity Numerical simulation Numerical simulation Ultimate displacement Ultimate displacement
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| GB/T 7714 | Wu, Xuezhen , Zhao, Mingzhu , Ye, Qing et al. A new deformable cable for rock support in high stress tunnel: Steel pipe shrinkable energy-absorbing cable [J]. | INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY , 2024 , 34 (8) : 1083-1093 . |
| MLA | Wu, Xuezhen et al. "A new deformable cable for rock support in high stress tunnel: Steel pipe shrinkable energy-absorbing cable" . | INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY 34 . 8 (2024) : 1083-1093 . |
| APA | Wu, Xuezhen , Zhao, Mingzhu , Ye, Qing , Jiang, Yujing , Deng, Tao , Zheng, Hanfang et al. A new deformable cable for rock support in high stress tunnel: Steel pipe shrinkable energy-absorbing cable . | INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY , 2024 , 34 (8) , 1083-1093 . |
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