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学者姓名：邓涛
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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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A vertical displacement model based on pile-soil interaction and continuum mechanics was proposed to simulate the displacement of the pile-soil system in response to the negative friction force of a single pile caused by ground overload. The model included the displacement function of the pile-soil axis and the attenuation function along the radial direction. The total potential energy of the pile-soil system was obtained by using the variational calculus, and the coupled control equations for the pile-soil displacement and attenuation function in the displacement model were obtained. The iterative method was used to solve these two coupling functions, and mathematical expressions for key parameters such as pile axial force, neutral plane, negative frictional resistance, down-drag force, and equivalent stiffness of soil spring were obtained. The correctness of the proposed method were verified through comparison with in-situ experiments and existing theoretical results. The results show that the ratio of pile-soil modulus has a significant impact on the negative friction resistance and down-drag force of piles, and the position of the neutral plane is closely related to the slenderness ratio, while it is not closely related to the ratio of pile-soil modulus. As the pile-soil modulus ratio increases and the pile slenderness ratio decreases, the axial force at the same position of the pile increases significantly, but the growth rate slows down. The maximum settlement of soil displacement around piles under ground overload occurs at the surface, and the range of 0. 3 times the pile length below the surface is a strongly affected area of displacement. The increase in pile slenderness ratio and pilesoil modulus ratio will both increase the range of influence on the displacement field of the soil around the pile. © 2024, Editorial Department of Journal of Architecture and Civil Engineering. All rights reserved.
Keyword ：
down-drag force down-drag force floating pile floating pile ground overload ground overload neutral plane neutral plane variational calculus variational calculus
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| GB/T 7714 | Liu, Q. , Su, Y. , Huang, Y. et al. Continuum mechanical solution for negative frictional resistance of single floating pile under ground overload [J]. | Journal of Architecture and Civil Engineering , 2024 , 41 (2) : 173-180 . |
| MLA | Liu, Q. et al. "Continuum mechanical solution for negative frictional resistance of single floating pile under ground overload" . | Journal of Architecture and Civil Engineering 41 . 2 (2024) : 173-180 . |
| APA | Liu, Q. , Su, Y. , Huang, Y. , Deng, T. . Continuum mechanical solution for negative frictional resistance of single floating pile under ground overload . | Journal of Architecture and Civil Engineering , 2024 , 41 (2) , 173-180 . |
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Calculating disc cutter wear and predicting wear life are long-standing issues affecting the efficiency and cost of tunnel boring machines (TBMs). During the TBM excavation process, the wear of the disc cutter is a comprehensive outcome of the interaction between the tool and rock. Studying the mechanisms of tool rock breaking and wear can assist in developing a more precise model for predicting cutter wear. Therefore, based on the rock- breaking and wear mechanisms of a cutter, this study developed a model for predicting the cutter wear rate and life. The model is based on the theory of dense core-cavity expansion combined with the motion state of a cutter. First, the TBM excavation process and rock-breaking mechanism of a cutter were analyzed in detail. A cutting force model under the compression shear failure mode based on the dense core-cavity expansion theory was established. Based on the force model, a prediction model for the wear rate and life of the disc cutter was established, considering the working characteristics and wear mechanism. Furthermore, the impact of penetration on the prediction model was investigated. In addition, to demonstrate the practicality of the method, this study conducted a comprehensive examination using engineering examples. The results showed that the average difference in the cutter average wear rate using the developed model was less than 3% compared with the actual engineering result. In addition, the average difference in the wear life rate was less than 5%. Finally, the developed prediction method was compared with other models. The wear rate fitting accuracy was improved by 4.91-10.85% and the wear life fitting accuracy was improved by 5.11-12.19% by the developed method. This improvement confirms the reasonableness and reliability of the method. This method can estimate the wear rate and lifespan of a cutter more accurately and reliably than other methods, providing a practical tool to TBM engineers to make informed decisions and optimize tool replacement programs.
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| GB/T 7714 | Su, H. , Guan, Z. C. , Deng, T. et al. Force and wear prediction model of disc cutter under compression shear failure mode based on dense core-cavity expansion theory (U-713) [J]. | GEOSHANGHAI 2024 INTERNATIONAL CONFERENCE, VOL 4 , 2024 , 1333 . |
| MLA | Su, H. et al. "Force and wear prediction model of disc cutter under compression shear failure mode based on dense core-cavity expansion theory (U-713)" . | GEOSHANGHAI 2024 INTERNATIONAL CONFERENCE, VOL 4 1333 (2024) . |
| APA | Su, H. , Guan, Z. C. , Deng, T. , Yang, Z. Q. , Qin, J. P. , Zheng, L. . Force and wear prediction model of disc cutter under compression shear failure mode based on dense core-cavity expansion theory (U-713) . | GEOSHANGHAI 2024 INTERNATIONAL CONFERENCE, VOL 4 , 2024 , 1333 . |
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Abstract ：
Calculating disc cutter wear and predicting wear life are long-standing issues affecting the efficiency and cost of tunnel boring machines (TBMs). During the TBM excavation process, the wear of the disc cutter is a comprehensive outcome of the interaction between the tool and rock. Studying the mechanisms of tool rock breaking and wear can assist in developing a more precise model for predicting cutter wear. Therefore, based on the rock-breaking and wear mechanisms of a cutter, this study developed a model for predicting the cutter wear rate and life. The model is based on the theory of dense core–cavity expansion combined with the motion state of a cutter. First, the TBM excavation process and rock-breaking mechanism of a cutter were analyzed in detail. A cutting force model under the compression shear failure mode based on the dense core–cavity expansion theory was established. Based on the force model, a prediction model for the wear rate and life of the disc cutter was established, considering the working characteristics and wear mechanism. Furthermore, the impact of penetration on the prediction model was investigated. In addition, to demonstrate the practicality of the method, this study conducted a comprehensive examination using engineering examples. The results showed that the average difference in the cutter average wear rate using the developed model was less than 3% compared with the actual engineering result. In addition, the average difference in the wear life rate was less than 5%. Finally, the developed prediction method was compared with other models. The wear rate fitting accuracy was improved by 4.91–10.85% and the wear life fitting accuracy was improved by 5.11–12.19% by the developed method. This improvement confirms the reasonableness and reliability of the method. This method can estimate the wear rate and lifespan of a cutter more accurately and reliably than other methods, providing a practical tool to TBM engineers to make informed decisions and optimize tool replacement programs.
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| GB/T 7714 | H Su , Z C Guan , T Deng et al. Force and wear prediction model of disc cutter under compression shear failure mode based on dense core–cavity expansion theory (U-713) [J]. | IOP Conference Series:Earth and Environmental Science , 2024 , 1333 (1) . |
| MLA | H Su et al. "Force and wear prediction model of disc cutter under compression shear failure mode based on dense core–cavity expansion theory (U-713)" . | IOP Conference Series:Earth and Environmental Science 1333 . 1 (2024) . |
| APA | H Su , Z C Guan , T Deng , Z Q Yang , J P Qin , L Zheng . Force and wear prediction model of disc cutter under compression shear failure mode based on dense core–cavity expansion theory (U-713) . | IOP Conference Series:Earth and Environmental Science , 2024 , 1333 (1) . |
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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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The rigorous solution for the single floating pile in layered soil subjected to lateral dynamic loads acting on the pile head is proposed. A unified depth -dependent soil mode function is systematically constructed using the matrix transfer method to ensure layer interface continuity. The model captures the pile head compliance comprehensively, encompassing swaying, rocking and cross -swaying -rocking compliance components. The model is validated by comparing with the existing solutions. The cutoff frequency for each mode is obtained explicitly and is captured by the present model. Parametric studies show that the cutoff frequency for the pile head swaying compliance component reaches the maximum value corresponding to each order of the cutoff frequency. The swaying compliance is affected significantly by the properties of the shallow layer, but its effect on the rocking -associated compliance components is limited. Furthermore, the horizontal displacement of the pile-soil system develops deeper and broader when the stratum becomes softer. The soil displacement attenuates rapidly with the distance to the pile and dissipates when it exceeds 20 times the pile diameter.
Keyword ：
Cutoff frequency Cutoff frequency Dynamic compliance Dynamic compliance Floating piles Floating piles Lateral response Lateral response Layered soil Layered soil
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| GB/T 7714 | Lin, Congyu , Liu, Qijian , Deng, Tao et al. A unified depth-dependent soil mode function for horizontal response of single floating piles in layered soil using improved Tajimi's model [J]. | COMPUTERS AND GEOTECHNICS , 2024 , 172 . |
| MLA | Lin, Congyu et al. "A unified depth-dependent soil mode function for horizontal response of single floating piles in layered soil using improved Tajimi's model" . | COMPUTERS AND GEOTECHNICS 172 (2024) . |
| APA | Lin, Congyu , Liu, Qijian , Deng, Tao , Tao, Hongwen . A unified depth-dependent soil mode function for horizontal response of single floating piles in layered soil using improved Tajimi's model . | COMPUTERS AND GEOTECHNICS , 2024 , 172 . |
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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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