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学者姓名：胡静
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Abstract ：
为研究移动荷载作用下的非饱和地基动力响应,在传统V-G土-水特征曲线模型的基础上,建立了考虑变形效应的土-水特征曲线模型,并基于该模型推导了新的非饱和土动力控制方程,从而完整描述非饱和土在受动力作用下的水-力耦合作用.进一步的,采用 2.5 维有限元法对控制方程进行求解,求解结果分别与单相弹性介质,双相饱和介质和三相非饱和介质的解析解进行对比,均验证了该求解方法的准确性;不同介质模型的计算耗时分析表明2.5维有限元法是目前求解多孔介质动力问题的一种优势算法.通过数值分析发现,采用传统的、未考虑变形效应的土-水特征曲线会低估非饱和地基的振动强度.
Keyword ：
2.5维有限元法 2.5维有限元法 动力响应 动力响应 土-水特征曲线 土-水特征曲线 水-力耦合 水-力耦合 非饱和土 非饱和土
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| GB/T 7714 | 胡静 , 金林廉 , 吕志豪 et al. 基于考虑变形效应的土-水特征曲线求解非饱和地基动力响应 [J]. | 岩土工程学报 , 2025 , 47 (2) : 397-406 . |
| MLA | 胡静 et al. "基于考虑变形效应的土-水特征曲线求解非饱和地基动力响应" . | 岩土工程学报 47 . 2 (2025) : 397-406 . |
| APA | 胡静 , 金林廉 , 吕志豪 , 张家康 , 边学成 . 基于考虑变形效应的土-水特征曲线求解非饱和地基动力响应 . | 岩土工程学报 , 2025 , 47 (2) , 397-406 . |
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The Laplace transform method is widely used for solving viscoelastic dynamic problems. However, the numerical inversion process of this method suffers from instability, especially for long-duration response issues. Moreover, the solutions obtained via the Laplace transform method are often semi-analytical. In this study, addressing the one-dimensional transient response problem of unsaturated viscoelastic porous media, an analytical solution is proposed based on the finite Fourier transform method. First, leveraging the symmetry of the problem, the solution of a typical stress-displacement boundary problem is transformed into the solution of a stress-stress boundary problem. Second, by applying finite Fourier sine and cosine transforms, the original second-order viscoelastic partial differential governing equations are transformed into a system of first-order ordinary differential equations in the frequency domain for solution, and the analytical solution in the frequency domain is provided using the state-space method. Finally, the finite Fourier inverse transform method is used to present the analytical solution in series form for the original problem in the time domain. The accuracy of the proposed method is validated through comparison with the Laplace solution method and existing elastic solution results. The analysis of numerical examples shows that the damping coefficient has a significant influence on the wave velocity. As the damping coefficient increases, the wave phase generally tends to decrease. With the increase in saturation , the velocities of and waves increase, while the velocity of the wave decreases.
Keyword ：
analytical solution analytical solution finite Fourier transform method finite Fourier transform method transient response transient response unsaturated porous medium unsaturated porous medium viscoelastic viscoelastic
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| GB/T 7714 | Zhao, Yun , Shi, Ya-bo , Chen, Zhang-long et al. Analytical Solution for the Transient Response of a One-Dimensional Viscoelastic Unsaturated Porous Medium [J]. | INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS , 2025 . |
| MLA | Zhao, Yun et al. "Analytical Solution for the Transient Response of a One-Dimensional Viscoelastic Unsaturated Porous Medium" . | INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS (2025) . |
| APA | Zhao, Yun , Shi, Ya-bo , Chen, Zhang-long , Hu, Jing , Xu, Ping , Shan, Zhen-dong . Analytical Solution for the Transient Response of a One-Dimensional Viscoelastic Unsaturated Porous Medium . | INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS , 2025 . |
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To investigate the influences of water saturation on dynamic responses in the unsaturated ground under moving load, this study derives Biot form governing equations for a three-phase unsaturated medium that can be easily solved using the solution framework of a single-phase or double-phase medium. The governing equations are solved via two-and-half dimensional finite element method (2.5D FE method). A 2.5D FE model of embankment-unsaturated ground system with the consideration of node's 9 DOFs (degree of freedoms) is established. Through the numerical analysis, it is found that when the load speed is during 0.5 V-C(min) to V-C(min) (V-C(min) is critical velocity of 100% saturated soil), the displacement responses at the embankment surface are independent of the load speed and only determined by the product of load speed and water saturation cS(r). When the load speed < 0.5 V-C(min), the displacement response amplitudes are independent of the load speed, mainly determined by the water saturation.
Keyword ：
2.5D FEM 2.5D FEM Unsaturated soil Unsaturated soil Water saturation Water saturation
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| GB/T 7714 | Jin, Linlian , Zeng, Liqun , Hu, Jing . Influences of Water Saturation on Dynamic Responses of Unsaturated Ground Subjected to a Single Moving Load [J]. | PROCEEDINGS OF THE 5TH INTERNATIONAL CONFERENCE ON TRANSPORTATION GEOTECHNICS, VOL 5, ICTG 2024 , 2025 , 406 : 333-343 . |
| MLA | Jin, Linlian et al. "Influences of Water Saturation on Dynamic Responses of Unsaturated Ground Subjected to a Single Moving Load" . | PROCEEDINGS OF THE 5TH INTERNATIONAL CONFERENCE ON TRANSPORTATION GEOTECHNICS, VOL 5, ICTG 2024 406 (2025) : 333-343 . |
| APA | Jin, Linlian , Zeng, Liqun , Hu, Jing . Influences of Water Saturation on Dynamic Responses of Unsaturated Ground Subjected to a Single Moving Load . | PROCEEDINGS OF THE 5TH INTERNATIONAL CONFERENCE ON TRANSPORTATION GEOTECHNICS, VOL 5, ICTG 2024 , 2025 , 406 , 333-343 . |
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Bentonite is widely used as an engineering barrier in radioactive waste disposal. This study examined the hydromechanical behavior and microstructural evolution of a bentonite mixture under controlled hydration, utilizing real-time X-ray micro-CT imaging to capture transitions from granular to dense homogeneous states. The results demonstrated that, during the early stages of hydration, bentonite pellets experienced substantial swelling, filling inter-pellet voids and transforming from a loosely packed granular structure to a compact, homogeneous matrix. This transformation significantly reduced the porosity from an initial value of 20% to below 0.1% after 60 days, thereby substantially lowering the material's permeability. Particle displacement analysis, employing digital image correlation techniques, revealed axial displacements of up to 2.6 mm and radial displacements of up to 0.9 mm, highlighting pronounced void closure and structural reorganization. The study also examined the influence of initial dry density heterogeneities on swelling pressure and permeability, providing insights for optimizing barrier design. The findings affirm that hydrated bentonite serves as a highly effective low-permeability barrier for sealing deep geological repositories. Its capacity for environmental adaptation, demonstrated through self-healing and densification, further reinforces its suitability for critical and long-term engineering applications.
Keyword ：
bentonite mixture bentonite mixture engineering barrier engineering barrier hydromechanical behavior hydromechanical behavior micro-CT imaging micro-CT imaging microstructural evolution microstructural evolution
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| GB/T 7714 | Liu, Kui , Hu, Jing , Zhang, Quanchang et al. Dynamic Microstructural Changes in Bentonite During Hydration: A Micro-CT Investigation [J]. | WATER , 2025 , 17 (9) . |
| MLA | Liu, Kui et al. "Dynamic Microstructural Changes in Bentonite During Hydration: A Micro-CT Investigation" . | WATER 17 . 9 (2025) . |
| APA | Liu, Kui , Hu, Jing , Zhang, Quanchang , Zeng, Chaofeng . Dynamic Microstructural Changes in Bentonite During Hydration: A Micro-CT Investigation . | WATER , 2025 , 17 (9) . |
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A rising water table increases soil water content, reduces soil strength, and amplifies vibrations under identical train loads, thereby posing greater risks to train operations. To investigate this phenomenon, we used a 2.5D finite element (FE) model of a coupled vehicle-embankment-ground system based on Biot's theory. The ground properties were derived from a typical soil profile of the Yangtze River basin, using geological data from Shanghai, China. The findings indicate that a rise in the water table leads to increased dynamic displacements of both the track and the ground. This amplification effect extends beyond the depth of the water table, impacting the entire embankment-foundation cross-section, and intensifies with higher train speeds. However, the water table rise has a limited impact on the critical speed of trains and dominant frequency contents. The dynamic response of the embankment is more significantly affected by water table rises within the subgrade than by those within the ground. When the water table rises into the subgrade, significant excess pore pressure is generated inside the embankment, causing a substantial drop in effective stress. As a result, the stress path of the soil elements in the subgrade approaches the Mohr-Coulomb failure line, increasing the likelihood of soil failure.
Keyword ：
2.5D finite element (FE) model 2.5D finite element (FE) model Dynamic response Dynamic response Excess pore pressures Excess pore pressures High-speed train High-speed train Water table rise Water table rise
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| GB/T 7714 | Hu, Jing , Ye, Chengming , Jiang, Junta et al. Dynamic response of the ground beneath a high-speed railway based on typical upper Shanghai clays involving water table change [J]. | JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A , 2025 , 26 (8) : 787-800 . |
| MLA | Hu, Jing et al. "Dynamic response of the ground beneath a high-speed railway based on typical upper Shanghai clays involving water table change" . | JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A 26 . 8 (2025) : 787-800 . |
| APA | Hu, Jing , Ye, Chengming , Jiang, Junta , Wu, Shujing , Thompson, David , Bian, Xuecheng . Dynamic response of the ground beneath a high-speed railway based on typical upper Shanghai clays involving water table change . | JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A , 2025 , 26 (8) , 787-800 . |
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强夯法加固地基效果对土石方安全处置与保障构筑物安全具有重要意义,当前针对群夯加固效果的研究较少.本文通过ABAQUS有限元软件建立强夯模型,充分考虑夯击振动波衰减以及土石填料力学参数随夯击数变化的现象,得到夯击引起的材料非线性响应过程.通过与工程实测数据对比,验证了本文模型的合理性,在此基础上建立正方形和菱形2种群夯模型.结果表明,单点强夯应力集中,具有较大的加固深度,分别比2种群夯提高了 16.1％和24.1％;而夯点间叠加区域土石填料最大沉降量分别为2种群夯夯点下方最大沉降量的12.9％和27.6％,群夯表现出对地基填料加固更为均匀的特点.参数分析表明,夯锤质量和夯径均会使夯击效果增大,但增长速率减小,交叉夯击模式在控制中心点沉降、均衡能量分配方面展现出明显优势.在工程地质条件允许的条件下应尽可能使用菱形夯点布置.
Keyword ：
加固深度 加固深度 土石填料 土石填料 夯击参数 夯击参数 数值模拟 数值模拟 群夯作用 群夯作用
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| GB/T 7714 | 许水音 , 沈铭龙 , 郑金伙 et al. 群夯作用下深厚土石填料加固机理数值研究 [J]. | 广西大学学报（自然科学版） , 2024 , 49 (6) : 1272-1279 . |
| MLA | 许水音 et al. "群夯作用下深厚土石填料加固机理数值研究" . | 广西大学学报（自然科学版） 49 . 6 (2024) : 1272-1279 . |
| APA | 许水音 , 沈铭龙 , 郑金伙 , 陈华晗 , 胡静 , 杨波 . 群夯作用下深厚土石填料加固机理数值研究 . | 广西大学学报（自然科学版） , 2024 , 49 (6) , 1272-1279 . |
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The fully encapsulated bolt is prone to stress concentration, which leads to the bolt breaking suddenly.Energy-absorbing bolt adapted to the large deformation of surrounding rock through slight yield but long-term support.When filling thickness to asperity height ratio (t/a) is small, the joint shear failure behavior is controlled by the asperities and the filling.When t/a is large, the joint shear failure mainly exists within the filling.
Keyword ：
Direct shear test Direct shear test Energy-absorbing bolt Energy-absorbing bolt Filling thickness Filling thickness JRC JRC Shear energy Shear energy
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| GB/T 7714 | Zheng, Hanfang , Wu, Xuezhen , Jiang, Yujing et al. Model Studies on the Effects of Filling Thickness and Joint Roughness on the Shear Characteristics of Fully Encapsulated Bolts and Energy-Absorbing Bolts [J]. | ROCK MECHANICS AND ROCK ENGINEERING , 2023 , 57 (1) : 765-777 . |
| MLA | Zheng, Hanfang et al. "Model Studies on the Effects of Filling Thickness and Joint Roughness on the Shear Characteristics of Fully Encapsulated Bolts and Energy-Absorbing Bolts" . | ROCK MECHANICS AND ROCK ENGINEERING 57 . 1 (2023) : 765-777 . |
| APA | Zheng, Hanfang , Wu, Xuezhen , Jiang, Yujing , Wang, Gang , Zheng, Bin , Zhu, Jihai et al. Model Studies on the Effects of Filling Thickness and Joint Roughness on the Shear Characteristics of Fully Encapsulated Bolts and Energy-Absorbing Bolts . | ROCK MECHANICS AND ROCK ENGINEERING , 2023 , 57 (1) , 765-777 . |
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基于Biot理论,建立了轨道-路基-多层饱和土地基耦合系统的 2.5 维有限元分析模型,提出了考虑实际列车循环荷载作用的路基累积沉降计算方法,分析了水位抬升、列车速度和列车轴重对路基动力响应与长期沉降的影响.研究结果表明:水位抬升对土体振动强度的放大作用并不是局限在水位变化的深度范围内,而是会导致整个路基和地基断面的振动增大,并且这种全断面式的振动放大效应随着列车速度的提高而增强;水位抬升至路基内部时,路基内部会出现显著的超静孔压,最大值达到 27.52 kPa,导致有效应力大幅下降,路基内土单元的应力路径向破坏线靠近;当水位仅在地基内抬升时,路基在列车循环荷载作用下的累积变形较小,线路沉降主要来自于地基,当水位抬升至路基内部时,路基累积变形随加载次数的增加发展迅速,100 万次加载后变形为 19.54 mm,远超容许值,说明路基防水对于线路的长期累积沉降控制具有关键作用;路基和地基的累积变形受列车速度和列车轴重的影响,随着列车轴重的增加而显著增大,并且轴重的增加对路基累积变形的影响相较于地基更强烈,在设计时需要格外关注.
Keyword ：
2.5维有限元 2.5维有限元 动力响应 动力响应 水位抬升 水位抬升 超静孔压 超静孔压 路基工程 路基工程 长期沉降 长期沉降 饱和地基 饱和地基
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| GB/T 7714 | 胡静 , 唐跃 , 张家康 et al. 水位抬升对高铁路基动力响应与长期沉降的影响 [J]. | 交通运输工程学报 , 2023 , 23 (4) : 75-91 . |
| MLA | 胡静 et al. "水位抬升对高铁路基动力响应与长期沉降的影响" . | 交通运输工程学报 23 . 4 (2023) : 75-91 . |
| APA | 胡静 , 唐跃 , 张家康 , 蒋红光 , 边学成 , 邓涛 . 水位抬升对高铁路基动力响应与长期沉降的影响 . | 交通运输工程学报 , 2023 , 23 (4) , 75-91 . |
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The increasing frequency of extreme rainfall is leading to a rise in groundwater levels in coastal areas, significantly affecting high-speed railway operations. To address this concern, this study developed a 2.5-dimensional finite element model of a coupled track-embankment-ground system based on Biot's porous media theory to analyze the effect of groundwater level rise on the critical velocity of high-speed railways and vibration responses. The findings reveal a consistent decrease in the critical velocity of high-speed railways with rising groundwater levels. Particularly, the increase in groundwater levels within the embankment significantly influences the critical velocity compared to a similar rise in the foundation's groundwater level. Furthermore, deformations induced by passing trains significantly increase as groundwater levels rise. Specifically, when the groundwater level rises from the foundation bottom to the subgrade surface, subgrade surface deformation increases by approximately 55%. As trains approach the critical velocity, significant vibration phenomena, known as the "Mach effect," occur at the foundation surface. Importantly, as groundwater levels rise, the "Mach effect" intensifies. Analyzing the vibrating frequency spectrum of the displacement response demonstrates a substantial increase in vibration amplitude, particularly in the high-frequency region, as groundwater levels rise. This study highlights that the rise in groundwater level not only amplifies vibrations but also extends the propagation of high-frequency vibrations, underscoring the importance of effective embankment waterproofing in controlling track vibrations.
Keyword ：
2.5D FEM 2.5D FEM critical velocity critical velocity dynamic response dynamic response groundwater level rise groundwater level rise high-speed railway high-speed railway
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| GB/T 7714 | Hu, Jing , Jin, Linlian , Wu, Shujing et al. Effect of Groundwater Level Rise on the Critical Velocity of High-Speed Railway [J]. | WATER , 2023 , 15 (21) . |
| MLA | Hu, Jing et al. "Effect of Groundwater Level Rise on the Critical Velocity of High-Speed Railway" . | WATER 15 . 21 (2023) . |
| APA | Hu, Jing , Jin, Linlian , Wu, Shujing , Zheng, Bin , Tang, Yue , Wu, Xuezheng . Effect of Groundwater Level Rise on the Critical Velocity of High-Speed Railway . | WATER , 2023 , 15 (21) . |
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This paper outlines an experimental and numerical hybrid analysis of dynamic responses generated by train traffic loading in an urban metro tunnel. It presents a set of measurements of the wheel loads, track bed vi-brations and pore pressures right below the tunnel to describe the excitation induced by train traffic loading and the propagation of dynamic responses in the railway system and surrounding soil. A key aim of this paper is to provide a set of dynamic response records that researchers can use for further investigation and the validation of numerical prediction models. The experimental analysis of vibration responses reveals that the resonance fre-quency of the track system (P2 resonance frequency) of 64 Hz in monolithic track bed coincides with the fre-quency where the largest track bed vibration occurs. There are residual pore pressures in some surrounding saturated soil during and after train passages, and the amplitudes of residual pore pressure grow with the train speeds. The serial number of the vehicles corresponding to the maximum excess pore pressure is relative to the train speed. The numerical analysis reveals that the extent of excess pore pressure build-up in tunnel surrounding soil during train passage is also determined by the ratio of train speed c and the soil Darcy permeability kD. For a tunnel buried at a deep depth like nearly 20 m, the shear stress is too small to excite the rotation of principal stress. The increase value of c/kD brings small but adverse implications in terms of the potential for soil failure. For the tunnel substratum soil, the initial stress state (i.e. K0) is a more dominant factor to determine the like-lihood of failure than underground train traffic load.
Keyword ：
Dynamic stress Dynamic stress In-situ measurement In-situ measurement Metro tunnels Metro tunnels Pore pressure Pore pressure Saturated soil Saturated soil Underground train traffic Underground train traffic
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| GB/T 7714 | Hu, Jing , Bian, Xuecheng . Experimental and numerical studies on dynamic responses of tunnel and soils due to train traffic loads [J]. | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2022 , 128 . |
| MLA | Hu, Jing et al. "Experimental and numerical studies on dynamic responses of tunnel and soils due to train traffic loads" . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 128 (2022) . |
| APA | Hu, Jing , Bian, Xuecheng . Experimental and numerical studies on dynamic responses of tunnel and soils due to train traffic loads . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2022 , 128 . |
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