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学者姓名：冯嵩
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Abstract ：
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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在传统毛细阻滞覆盖层的粗-细粒土界面处添加多个方形碎石垄,形成锯齿状的毛细阻滞覆盖层.锯齿状毛细阻滞界面有利于在顺坡方向形成多个导排长度,主动控制底部渗漏位置.在碎石垄下方设置的导排盲沟收集部分渗漏雨水,降低进入固废堆体的渗漏量.考虑碎石垄尺寸、细粒土层厚度、覆盖层坡度、雨型、极端降雨和长时间降雨等参数,对比锯齿状毛细阻滞覆盖层与传统毛细阻滞覆盖层的性能.结果表明,锯齿状毛细阻滞覆盖层的渗漏量比传统毛细阻滞覆盖层的低17％～25％;无论是在极端降雨情况下,还是在长时间降雨情况下,锯齿状毛细阻滞覆盖层的渗漏量均小于国际年渗漏量标准.碎石垄高度超过0.2 m或碎石垄边长和间距增加会导致锯齿状毛细阻滞覆盖层的渗漏量增加,底部渗漏量随覆盖层坡度和细粒土层厚度的提高逐渐减小.2种覆盖层在不同降雨模式下的渗漏量由大到小依次为超前型降雨、等强型、中心型模式、滞后型,锯齿状毛细阻滞覆盖层的渗漏量受雨型的影响较传统毛细阻滞覆盖层的小.
Keyword ：
有限元 有限元 毛细阻滞 毛细阻滞 水分运移 水分运移 渗漏 渗漏 锯齿状覆盖层 锯齿状覆盖层
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| GB/T 7714 | 郑雅华 , 刘红位 , 冯嵩 . 锯齿状毛细阻滞覆盖层渗漏量的参数研究 [J]. | 浙江大学学报（工学版） , 2025 , 59 (4) : 730-740 . |
| MLA | 郑雅华 et al. "锯齿状毛细阻滞覆盖层渗漏量的参数研究" . | 浙江大学学报（工学版） 59 . 4 (2025) : 730-740 . |
| APA | 郑雅华 , 刘红位 , 冯嵩 . 锯齿状毛细阻滞覆盖层渗漏量的参数研究 . | 浙江大学学报（工学版） , 2025 , 59 (4) , 730-740 . |
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AimsVariabilities of vegetation and soil cause uncertainty to the factor of safety (FoS) of unsaturated vegetated slopes, yet the significance of these variabilities on the uncertainty of FoS is unclear. This study aims to quantify the effect of the uncertainties of root reinforcement and soil hydromechanical properties to the uncertainty of the FoS.MethodsThe variance-based global sensitivity analysis was adopted to evaluate how the variance of FoS of vegetated slopes can be apportioned by the variabilities of soil and root parameters. A copula theory was applied to model the correlation amongst the parameters.ResultsFor slip depths shallower than 0.30 m, the major source of the variance of the FoS included the parameters that define root reinforcement, followed by the parameters of soil shear strength. The variation of transpiration-induced soil suction had limited effect on the FoS variance under heavy rainfall. Taking into account the correlations amongst the parameters had minor influence on their contribution to the variance of the FoS.ConclusionsWe observed threshold slip depths, where the relative contribution of uncertainties in root and soil parameters on the FoS uncertainty underwent a transition. Root reinforcement for slips as deep as 0.60 m can provide reliable slope stabilisation effects.
Keyword ：
Global sensitivity analysis Global sensitivity analysis Reliability analysis Reliability analysis Slope stability Slope stability Soil bioengineering Soil bioengineering Uncertainty characterisation Uncertainty characterisation Vegetation Vegetation
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| GB/T 7714 | Xian, Jiantang , Zhu, Jun , Leung, Anthony Kwan et al. Using global sensitivity analysis to quantify the uncertainty of root reinforcement in vegetated slope stability [J]. | PLANT AND SOIL , 2025 . |
| MLA | Xian, Jiantang et al. "Using global sensitivity analysis to quantify the uncertainty of root reinforcement in vegetated slope stability" . | PLANT AND SOIL (2025) . |
| APA | Xian, Jiantang , Zhu, Jun , Leung, Anthony Kwan , Wu, Chenguang , Feng, Song , Zhang, Jie . Using global sensitivity analysis to quantify the uncertainty of root reinforcement in vegetated slope stability . | PLANT AND SOIL , 2025 . |
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This study performed microfluidic experiments of water displacing air at a low injection rate to provide deeper insights into capillary barrier effects (CBEs), which are encountered in numerous geotechnical and geoenvironmental applications. Four microfluidic chips with varying pore networks, including one single-layer and three double-layer configurations, were used to examine how pore characteristics impact CBEs. Tilt angles were systematically applied to the chips to explore the influence of gravity on CBEs. The results revealed that the introduction of gravity induced directional water invasion, producing downward preferential flows. CBEs were clearly observed when water moved from fine to coarse layers, causing the water motion direction to shift from downward to lateral or backward, and resulting in perched water above the fine-coarse interfaces. Notably, the pause duration of the advancing water front proved to be a more reliable indicator of CBEs' effectiveness at the microscale than the water storage capacity of fine layers. The formation of CBEs required that the maximum driving pressure on the water-air interface be provided by fine layers after the water front reached the fine-coarse interfaces. A smaller gravitational force and larger pore sizes in coarse layers reduced the driving pressure provided by coarse layers, thereby enhancing the effectiveness of CBEs.
Keyword ：
capillary barrier effects capillary barrier effects gravity gravity microfluidics microfluidics microscale behavior microscale behavior pore characteristics pore characteristics
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| GB/T 7714 | Li, Guangyao , Gong, Wentao , Feng, Song et al. Gaining insights into capillary barrier effects through microfluidic experiments incorporating gravity [J]. | CANADIAN GEOTECHNICAL JOURNAL , 2025 , 62 . |
| MLA | Li, Guangyao et al. "Gaining insights into capillary barrier effects through microfluidic experiments incorporating gravity" . | CANADIAN GEOTECHNICAL JOURNAL 62 (2025) . |
| APA | Li, Guangyao , Gong, Wentao , Feng, Song , Zhan, Liangtong , Du, Xiuli . Gaining insights into capillary barrier effects through microfluidic experiments incorporating gravity . | CANADIAN GEOTECHNICAL JOURNAL , 2025 , 62 . |
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The huge amount of leachate generated in landfills causes persistent pollution to soil and groundwater. Landfill cover is vital for reducing leachate generation through reducing rainwater infiltration. Yet, the traditional cover with capillary barrier effects (CCBE) is only applicable in reducing rainwater percolation at its base in arid or semi-arid region. To solve this problem, a novel capillary barrier cover is proposed, which adds multiple gravelsegments to the traditional CCBE to form the zipper-shape interface between fine- and coarse-grained soils. Hydraulic response of this zippered CCBE is numerically investigated considering different gravel-segment sizes, drainage-ditch widths and climate conditions. It is found that the zippered CCBE has a lower water percolation than the traditional one by up to 57 %. It is because the capillary barrier effects along the right side-wall of gravel-segment leads to water accumulation and hence water percolation near its base, facilitating reducing water percolation using drainage ditch below the gravel-segment. Moreover, water percolation increases when the gravel-segment height exceeds 0.3 times thickness of fine-grained soil or the gravel-segment width increases, due to reduction of water storage in fine-grained soil. Under the recorded annual precipitation of 1235 mm in the semi-humid region in China, the annual percolation of the traditional and zippered CCBEs are 84 mm/year and 36 mm/year, respectively. Thus, the zippered CCBE might extent the applicability of the traditional CCBE from arid or semi-arid region to semi-humid region.
Keyword ：
Capillary barrier effects Capillary barrier effects Finite element Finite element Landfill cover Landfill cover Percolation Percolation Water movement Water movement Zipper-shape interface Zipper-shape interface
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| GB/T 7714 | Feng, Song , Zheng, Yahua , Liu, Hongwei et al. Numerical study of rainfall percolation through a novel capillary barrier cover with a zipper-shape interface between fine- and coarse-grained soils [J]. | WASTE MANAGEMENT , 2025 , 191 : 220-229 . |
| MLA | Feng, Song et al. "Numerical study of rainfall percolation through a novel capillary barrier cover with a zipper-shape interface between fine- and coarse-grained soils" . | WASTE MANAGEMENT 191 (2025) : 220-229 . |
| APA | Feng, Song , Zheng, Yahua , Liu, Hongwei , Li, Guangyao , Qian, Xin . Numerical study of rainfall percolation through a novel capillary barrier cover with a zipper-shape interface between fine- and coarse-grained soils . | WASTE MANAGEMENT , 2025 , 191 , 220-229 . |
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A novel capillary barrier cover was proposed, which added multiple gravel segments to the traditional cover with capillary barrier effects (CCBE) to form a zipper-shape CCBE between fine-grained and coarse-grained soils. The zipper-shape interface along the slope was designed to help the formation of several diversion lengths while controlling water percolation location. The drainage ditch arranged below the gravel segment was effectively used to reduce the water percolation into the buried wastes underneath the cover. Considering the gravel segment sizes, the thickness of fine-grained soils, the slope of CCBE, rainfall pattern, and extreme and prolonged rainfall, the hydraulic performance of the proposed zippered CCBE with the traditional one was compared. Results showed that the water percolation of zippered CCBE was 17%-25% lower than the traditional one. In both extreme and prolonged rainfall conditions, the percolation of the zippered CCBE was lower than the international annual percolation standard. Increased percolation of the zippered CCBE was observed when the gravel segment height exceeded 0.2 m or the gravel segment width and spacing augmented, and water percolation gradually decreased with the increase of the thickness of fine-grained soils and the slope of landfill cover. Among the two types of CCBE, percolation varies under different rainfall patterns, ranked from highest to lowest: the advanced rainfall pattern, the uniform pattern, the central pattern, and the delayed pattern. Compared to the traditional CCBE, the zippered one is less affected by the rainfall pattern in terms of water percolation. © 2025 Zhejiang University. All rights reserved.
Keyword ：
Capillary tubes Capillary tubes Gravel Gravel Percolation (computer storage) Percolation (computer storage) Percolation (fluids) Percolation (fluids) Percolation (solid state) Percolation (solid state)
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| GB/T 7714 | Zheng, Yahua , Liu, Hongwei , Feng, Song . Numerical parametric study of percolation through capillary barrier cover with zipper-shape interface [J]. | Journal of Zhejiang University (Engineering Science) , 2025 , 59 (4) : 730-740 . |
| MLA | Zheng, Yahua et al. "Numerical parametric study of percolation through capillary barrier cover with zipper-shape interface" . | Journal of Zhejiang University (Engineering Science) 59 . 4 (2025) : 730-740 . |
| APA | Zheng, Yahua , Liu, Hongwei , Feng, Song . Numerical parametric study of percolation through capillary barrier cover with zipper-shape interface . | Journal of Zhejiang University (Engineering Science) , 2025 , 59 (4) , 730-740 . |
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Single shell segmental lining can withstand a maximum water head of about 50 m. If the water pressure exceeds this value, it is necessary to partially reduce groundwater pressure acting behind the tunnel lining.This paper presents a novel TBM tunnel drainage technology that employs adjustable pressure valves to regulate the volume of incoming water. This method not only reduces the impact of tunnel drainage on the surrounding groundwater environment but also effectively decreases the water pressure behind the lining, lowering the risk of structural damage and enhancing the load-bearing capacity of the lining. This represents an integration of prevention and drainage in the engineering concept of groundwater control.The study commenced with field experiments in the Daxiang Mountain Tunnel of the Fuzhou Intercity Railway, focusing on the effects of different drainage hole spacings and pressure valve settings on tunnel water inflow, pressure behind segmental linings, and strain on the linings' inner surfaces. A numerical model was subsequently constructed to compare and validate these field monitoring results, which demonstrated a high level of agreement. Finally, a parametric analysis was conducted, and the results indicate: (1) Although increasing the spacing between drainage holes effectively controls groundwater discharge, the resulting higher water gradient near these holes significantly increases bending moments at the foot of the side wall and invert of the lining, thus elevating the risk of structural disorders in the lining. (2) At segmental linings with drainage holes spaced at 3.6 m, the installation of pressure valves set to 400 kPa reduced the drainage volume from 2.18 m3/(D center dot m) to 1.56 m3/(D center dot m) compared to the full drainage scenario. This reduction satisfies the groundwater conservation requirements of the Daxiang Mountain area and significantly lowers the risk of structural damage to the lining caused by high water gradients near the drainage holes. Consequently, the load-bearing capacity of the segmental tunnel structure is effectively utilized. The research outcomes of this paper can offer guidance for the drainage countermeasure design in similar TBM tunnel projects.
Keyword ：
Field Experiments Field Experiments Groundwater Inflow Groundwater Inflow Groundwater Pressure Relief Groundwater Pressure Relief Pressure Valve Pressure Valve Single shield TBM Single shield TBM
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| GB/T 7714 | Zeng, Yuan-Chi , Ji, Lu-Ling , Liu, Yu-Chuan et al. Numerical analysis and field experiments of a new drainage system with pressure valves for single shield TBM [J]. | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2025 , 155 . |
| MLA | Zeng, Yuan-Chi et al. "Numerical analysis and field experiments of a new drainage system with pressure valves for single shield TBM" . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 155 (2025) . |
| APA | Zeng, Yuan-Chi , Ji, Lu-Ling , Liu, Yu-Chuan , Feng, S. . Numerical analysis and field experiments of a new drainage system with pressure valves for single shield TBM . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2025 , 155 . |
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Accurately depicting the highly nonlinear hydraulic properties of soil is critical for predicting pore-water pressure distributions and evaluating the stability of vegetated slopes. Accordingly, semi-analytical solutions are proposed for calculating pore-water pressure distributions and slope stability in an infinite multi-layered slope considering both hydrological and mechanical effects of vegetation. The solutions have the advantage of depicting the highly nonlinear hydraulic properties of soil, both with and without roots, using a multiexponential function. After verifying the solutions, parametric studies are conducted to investigate influential factors on pore-water pressure distributions, including root architecture, root volume ratio, root depth and the combination of different soil layers in landfill cover. It is found that compared to the multi-exponential function, the single-exponential function commonly used in published solutions significantly underestimates negative pore-water pressure induced by root water uptake by up to 65 kPa under drying conditions, because it fails to depict soil hydraulic properties accurately. When root reduces the hydraulic conductivity of unsaturated soil, larger negative pore-water pressure induced by root water uptake within root zone could be observed under drying conditions, while the trend reverses under wetting conditions. The effects of root architecture and rootinduced changes in the hydraulic conductivity of unsaturated soil on pore-water pressure distributions become more significant as the root volume ratio increases. Under drying conditions, root water uptake induces the largest negative pore-water pressure near the ground surface in the three-layer landfill cover, compared with the cover with capillary barrier effects and single-layer cover. The derived solutions can be used to guide engineering practices of vegetated slope and landfill cover.
Keyword ：
Hydrological effects Hydrological effects Mechanical effects Mechanical effects Root architecture Root architecture Root water uptake Root water uptake
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| GB/T 7714 | Feng, Song , Huang, Ruhong , Li, Guangyao et al. Semi-analytical solutions for pore-water pressure distributions and slope stability in an infinite multi-layered vegetated slope considering highly-nonlinear hydraulic properties of soil [J]. | COMPUTERS AND GEOTECHNICS , 2025 , 186 . |
| MLA | Feng, Song et al. "Semi-analytical solutions for pore-water pressure distributions and slope stability in an infinite multi-layered vegetated slope considering highly-nonlinear hydraulic properties of soil" . | COMPUTERS AND GEOTECHNICS 186 (2025) . |
| APA | Feng, Song , Huang, Ruhong , Li, Guangyao , Zhan, Liangtong , Kamchoom, Viroon , Liu, Hongwei et al. Semi-analytical solutions for pore-water pressure distributions and slope stability in an infinite multi-layered vegetated slope considering highly-nonlinear hydraulic properties of soil . | COMPUTERS AND GEOTECHNICS , 2025 , 186 . |
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Global warming has caused frequent occurrences of extreme rainfall events worldwide. Studying the rainwater infiltration in monolithic soil covers (MSCs) and associated slope stability under heavy rainfall presents practical significance for landfill management. This study established an analytical solution for rainwater infiltration in MSCs during heavy rainfall assuming that the soil hydraulic properties follow exponential forms. The analytical solution was used to calculate the factor of safety (FOS) of MSCs after the verification with numerical simulations. It is found that the FOS for the potential slip surface at the cover bottom remained the lowest during and after heavy rainfall. The percolation and FOS might present pronounced "lag effects", meaning that the maximum percolation rate and minimum FOS occurred after heavy rainfall. A parametric study was conducted to reveal the influencing factors on the hydraulic response and slope stability of MSCs based on the analytical solution. Relevant results demonstrate that the hydraulic performance and slope stability could be improved by decreasing soil saturated hydraulic conductivity, increasing soil desaturation coefficient, and lowering water level in landfills. The results also reveal the existence of a threshold of soil saturated hydraulic conductivity (1 x 10-8 m/s for this study) for controlling the hydraulic performance and slope stability of MSCs. Furthermore, the analytical solution was applied to determine the rainfall intensity-duration threshold curves of MSCs. The results indicate that the obtained curves of MSCs satisfied exponential forms. This study provides an effective tool and valuable guidance for the design and maintenance of MSCs.
Keyword ：
analytical solution analytical solution heavy rainfall heavy rainfall monolithic soil cover monolithic soil cover rainwater infiltration rainwater infiltration slope stability slope stability
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| GB/T 7714 | Li, Guangyao , Liu, Zhaolong , Jiao, Weiguo et al. Analytical solution for rainwater infiltration in monolithic soil covers under heavy rainfall and its implications for practice [J]. | CANADIAN GEOTECHNICAL JOURNAL , 2025 , 62 . |
| MLA | Li, Guangyao et al. "Analytical solution for rainwater infiltration in monolithic soil covers under heavy rainfall and its implications for practice" . | CANADIAN GEOTECHNICAL JOURNAL 62 (2025) . |
| APA | Li, Guangyao , Liu, Zhaolong , Jiao, Weiguo , Feng, Song , Zhan, Liangtong , Du, Xiuli . Analytical solution for rainwater infiltration in monolithic soil covers under heavy rainfall and its implications for practice . | CANADIAN GEOTECHNICAL JOURNAL , 2025 , 62 . |
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Relying solely on soil properties may not fully ensure the performance of capillary barrier covers at limiting landfill gas (LFG) emissions. This study proposed to install passive gas collection pipes in the coarse-grained soil layers of capillary barrier covers to enhance their performance at limiting LFG emissions. First, the LFG generation rate of municipal solid waste and its influencing factors were analyzed based on empirical formulas. This information provided necessary bottom boundary conditions for the analyses of LFG transport through capillary barrier covers with passive gas collection pipes (CBCPPs). Then, numerical simulations were conducted to investigate the LFG transport properties through CBCPPs and reveal relevant influencing factors. Finally, practical suggestions were proposed to optimize the design of CBCPPs. The results indicated that the maximum whole-site LFG generation rate occurred at the end of landfilling operation. The gas collection efficiency (E) of CBCPPs was mainly controlled by the ratio of the intrinsic permeability between the coarse- and fine-grained soil (K2/K1) and the laying spacing between gas collection pipes (D). E increased as K2/K1 increased but decreased as D increased. An empirical expression for estimating E based on K2/K1 and D was proposed. In practice, CBCPPs
Keyword ：
Capillary barrier cover Capillary barrier cover Landfill gas emission mitigation Landfill gas emission mitigation Numerical simulation Numerical simulation Optimal design Optimal design Passive gas collection pipe Passive gas collection pipe
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| GB/T 7714 | Li, Guangyao , Liu, Sida , Jiao, Weiguo et al. Numerical investigation and optimal design of capillary barrier cover with passive gas collection pipes on the performance at limiting landfill gas emissions [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2024 , 927 . |
| MLA | Li, Guangyao et al. "Numerical investigation and optimal design of capillary barrier cover with passive gas collection pipes on the performance at limiting landfill gas emissions" . | SCIENCE OF THE TOTAL ENVIRONMENT 927 (2024) . |
| APA | Li, Guangyao , Liu, Sida , Jiao, Weiguo , Feng, Song , Zhan, Liangtong , Chen, Yunmin . Numerical investigation and optimal design of capillary barrier cover with passive gas collection pipes on the performance at limiting landfill gas emissions . | SCIENCE OF THE TOTAL ENVIRONMENT , 2024 , 927 . |
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