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学者姓名：阙云
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Abstract ：
为了揭示聚氨酯胶结料的过早破坏机制,更好地优化配方和施工工艺,通过分析抗拉强度、剪切强度、黏结强度以及断裂伸长率、微观形貌和官能团,对聚氨酯胶结料的破坏机制进行规律总结.结果表明,老化480 h后,水热老化的断裂伸长率是热氧老化下降量的2.44倍,黏结强度和剪切强度的下降比例分别为热氧老化的4.01倍和8.95倍.并且,紫外老化对抗拉强度的削弱作用远大于后固化而增加的强度,其老化速率加快,抗拉强度下降速率也随之加快.此外,在路面施工过程中,应尽量保证水泥路面的含水率低于4%,降雨后干燥24 h左右便可继续施工,工期紧张时可以采用大功率落地式工业电风扇或者红外加热车等降低路面含水率,以确保聚氨酯胶结料的施工质量.
Keyword ：
材料老化 材料老化 破坏分析 破坏分析 紫外老化 紫外老化 聚氨酯胶 聚氨酯胶
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| GB/T 7714 | 徐松 , 王叶飞 , 魏必成 et al. 聚氨酯铺装材料的过早破坏机制研究 [J]. | 湖南大学学报（自然科学版） , 2024 , 51 (9) : 99-110 . |
| MLA | 徐松 et al. "聚氨酯铺装材料的过早破坏机制研究" . | 湖南大学学报（自然科学版） 51 . 9 (2024) : 99-110 . |
| APA | 徐松 , 王叶飞 , 魏必成 , 袁燕 , 阙云 , 林存辉 . 聚氨酯铺装材料的过早破坏机制研究 . | 湖南大学学报（自然科学版） , 2024 , 51 (9) , 99-110 . |
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为揭示透明土材料传热特性,基于透明土立柱试验、灰度像素图像及热红外图像技术,建立归一化像素强度与温度对应关系.在此基础上,分析顶部传热和底部传热2种传递方式下透明土的热传递规律.结果表明:通过建立归一化像素强度反映透明效果,发现透明度与透明土温度之间存在线性关系,随着温度的升高,透明土透明效果先增强再减弱.在顶部加热时,透明土柱呈现不均匀传热特性,边缘温度带呈现圆弧状不规则波动,热量核心区域范围更大;底部加热时,透明土柱受热均匀,边缘温度带较为平整且呈现条带状,热量核心区域较小.透明土顶部加热较底部加热的热传递效率更快.无论何种传热方式,加热点处透明土温度在持续加热下呈非线性变化特征,且越靠近热源,该现象越显著.
Keyword ：
底部传递 底部传递 归一化像素强度 归一化像素强度 热传递 热传递 透明土 透明土 顶部传递 顶部传递
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| GB/T 7714 | 陈嘉 , 蔡松林 , 阙云 et al. 基于图像识别技术的透明土热传递特性分析 [J]. | 南昌大学学报（工科版） , 2024 , 46 (3) : 338-344 . |
| MLA | 陈嘉 et al. "基于图像识别技术的透明土热传递特性分析" . | 南昌大学学报（工科版） 46 . 3 (2024) : 338-344 . |
| APA | 陈嘉 , 蔡松林 , 阙云 , 黄琪凯 , 翁斌 . 基于图像识别技术的透明土热传递特性分析 . | 南昌大学学报（工科版） , 2024 , 46 (3) , 338-344 . |
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Mountain road construction often involves crossing numerous ravine terrains. To ensure road safety, numerous shoulder retaining walls are built to stabilize the roadbed. However, the limitations imposed by gullies result in significant spatial effects on the soil pressure distribution behind the walls, rendering traditional two-dimensional soil pressure theories inadequate. To investigate the spatial distribution of active earth pressure on clayey fill behind the walls, this paper presents a three-dimensional theoretical solution for earth pressure on V-type retaining walls in gully terrains, using theoretical analysis and numerical simulation. The results indicate that the clayey fill causes a slip crack behind the wall, forming a tension crack region with zero earth pressure, the depth of which increases with the fill's cohesive force. Additionally, the earth pressure distribution behind the V-type retaining wall exhibits a significant spatial effect, being "larger in the middle and smaller at the ends" along the wall's width. Compared to traditional two-dimensional theories, the earth pressure predicted by this spatial theory is lower, and the resultant force location is higher, and the overturning resistance in region III is largest. Therefore, this part should be enhanced in construction design. (c) 2024 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society. This is an open access article under the CC BY- NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keyword ：
Clayey fill Clayey fill Gully terrain Gully terrain Retaining wall Retaining wall Spatial active earth pressure Spatial active earth pressure Tensile crack Tensile crack
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| GB/T 7714 | Que, Yun , Zhang, Jisong , Tian, Yu et al. Spatial earth pressure analysis of clayey fill behind retaining wall in V-shaped gully terrain [J]. | SOILS AND FOUNDATIONS , 2024 , 64 (6) . |
| MLA | Que, Yun et al. "Spatial earth pressure analysis of clayey fill behind retaining wall in V-shaped gully terrain" . | SOILS AND FOUNDATIONS 64 . 6 (2024) . |
| APA | Que, Yun , Zhang, Jisong , Tian, Yu , Li, Xiaosong . Spatial earth pressure analysis of clayey fill behind retaining wall in V-shaped gully terrain . | SOILS AND FOUNDATIONS , 2024 , 64 (6) . |
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To promote the anti-ageing performance of asphalt, layered double hydroxides (LDHs) modified by propyl trimethoxylsilane (MPMS) was prepared and applied to modify asphalt. Fourier transform infrared spectroscopy (FTIR) showed that MPMS was chemically-grafted on the surface of LDHs. The interaction between LDHs and asphalt was significantly enhanced after MPMS organic modification, and MPMS organic LDHs (OMLDHs) exhibited better compatibility in asphalt. OMLDHs and LDHs could enhance the high-temperature properties of asphalt, particularly OMLDHs. After ageing, the properties and structure of asphalt were dramatically degenerated. The incorporation of LDHs could inhibit the oxygenic groups increase in asphalt molecules during ageing, and retard the gelatinization of colloidal structures. LDHs could alleviate the negative effect of ageing on asphalt, and improve the anti-ageing performance of asphalt. The improvement effectiveness of LDHs on the anti-ageing performance of asphalt was remarkably improved after MPMS modification.
Keyword ：
Anti-ageing performance Anti-ageing performance Asphalt Asphalt Chemical components Chemical components Chemical structure Chemical structure Layered double hydroxides Layered double hydroxides Molecular dynamics simulation Molecular dynamics simulation Rheological properties Rheological properties Surface organic modification Surface organic modification
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| GB/T 7714 | Zhang, Canlin , Chen, Minxuan , Wang, Ting et al. Evaluation of surface organic layered double hydroxides on the anti-ageing performance of asphalt [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 413 . |
| MLA | Zhang, Canlin et al. "Evaluation of surface organic layered double hydroxides on the anti-ageing performance of asphalt" . | CONSTRUCTION AND BUILDING MATERIALS 413 (2024) . |
| APA | Zhang, Canlin , Chen, Minxuan , Wang, Ting , Xu, Song , Li, Yifei , Que, Yun et al. Evaluation of surface organic layered double hydroxides on the anti-ageing performance of asphalt . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 413 . |
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Infiltration-runoff-slope instability mechanism of macropore slope under heavy rainfall is unclear. This paper studied its instability mechanism with an improved Green-Ampt (GA) model considering the dual-porosity (i.e., matrix and macropore) and ponding condition, and proposed the infiltration equations, infiltration-runoff coupled model, and safety factor calculation method. Results show that the infiltration processes of macropore slope can be divided into three stages, and the proposed model is rational by a comparative analysis. The wetting front depth of the traditional unsaturated slope is 17.2% larger than that of the macropore slope in the early rainfall stage and 27% smaller than that of the macropore slope in the late rainfall stage. Then, macropores benefit the slope stability in the early rainfall but not in the latter. Macropore flow does not occur initially but becomes pronounced with increasing rainfall duration. The equal depth of the wetting front in the two domains is regarded as the onset criteria of macropore flow. Parameter analysis shows that macropore flow is delayed by increasing proportion of macropore domain (ωf), whereas promoted by increasing ratio of saturated permeability coefficients between the two domains (μ). The increasing trend of ponding depth is sharp at first and then grows slowly. Finally, when rainfall duration is less than 3 h, ωf and μ have no significant effect on the safety factor, whereas it decreases with increasing ωf and increases with increasing μ under longer duration (≥ 3 h). With the increase of ωf, the slope maximum instability time advances by 10.5 h, and with the increase of μ, the slope maximum instability time delays by 3.1 h. © Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024.
Keyword ：
Equivalent wetting front Equivalent wetting front Green-Ampt infiltration model Green-Ampt infiltration model Macropore slope Macropore slope Ponding response time Ponding response time Slope stability Slope stability
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| GB/T 7714 | Li, S. , Wu, G. , Que, Y. et al. Infiltration, runoff, and slope stability behaviors of infinite slope with macropores based on an improved Green-Ampt model [J]. | Journal of Mountain Science , 2024 , 21 (7) : 2220-2235 . |
| MLA | Li, S. et al. "Infiltration, runoff, and slope stability behaviors of infinite slope with macropores based on an improved Green-Ampt model" . | Journal of Mountain Science 21 . 7 (2024) : 2220-2235 . |
| APA | Li, S. , Wu, G. , Que, Y. , Jiang, Z. , Cheng, G. . Infiltration, runoff, and slope stability behaviors of infinite slope with macropores based on an improved Green-Ampt model . | Journal of Mountain Science , 2024 , 21 (7) , 2220-2235 . |
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为揭示降雨条件下大孔隙参数对斜坡水分非均匀运移与稳定性的影响，基于两域模型与稳定系数场原理，建立降雨入渗下斜坡非均匀渗流与稳定性求解模型，并借助COMSOL Multiphysics多物理场有限元平台，编制相应的模型求解程序，通过大孔隙土柱降雨试验验证数值模型的合理性，对比均匀流与非均匀流条件下斜坡体积含水率和点稳定系数，分析大孔隙参数（大孔隙占比ω_f、两域导水系数之比μ、大孔隙经验参数r_w）对斜坡渗流场及稳定系数场的影响规律。结果表明：相比不考虑大孔隙，考虑大孔隙时的基质域和大孔隙域表层体积含水率分别增长7.7%和降低5.1%，入渗深度分别增长83.3%和150.0%；边坡浅层失稳面积增大3.9%。基质域和大孔隙域入渗深度均随大孔隙占比ω_f的增大而减小；随着大孔隙域与基质域饱和渗透系数之比μ增大，两者入渗深度变化趋势相反，即μ越大，基质域入渗深度越小，大孔隙域反之；两者与经验参数r_w无显著关系。至降雨结束，基质域表层土体体积含水率已达最大值；大孔隙域则随着ω_f和μ的增大而增大，但几乎不受经验参数r_w的影响。非均匀流条件下，边坡水分交换沿着剖面从上往下分为负交换区、正交换区和无交换区，水分交换平衡深度与基质域入渗深度变化趋势一致；水分交换负交换区与正交换区的深度均存在一个峰值，并随大孔隙占比ω_f的增大而减小，随着μ和r_w的增大而增大。不同参数取值下，边坡均为浅层失稳破坏，ω_f和μ越大，失稳层深度越大，表层点稳定系数越小，因此大孔隙不利于边坡稳定。
Keyword ：
入渗深度 入渗深度 大孔隙参数 大孔隙参数 水分交换 水分交换 点稳定系数 点稳定系数 非均匀流 非均匀流
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| GB/T 7714 | 阙云 , 李尚辉 , 詹小军 et al. 大孔隙参数对斜坡非均匀渗流与稳定性的影响 [J]. | 工程科学与技术 , 2024 , 56 (03) : 122-133 . |
| MLA | 阙云 et al. "大孔隙参数对斜坡非均匀渗流与稳定性的影响" . | 工程科学与技术 56 . 03 (2024) : 122-133 . |
| APA | 阙云 , 李尚辉 , 詹小军 , 张吉松 , 薛斌 , 谢秀栋 . 大孔隙参数对斜坡非均匀渗流与稳定性的影响 . | 工程科学与技术 , 2024 , 56 (03) , 122-133 . |
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为提高现有沥青路面压实密度预测模型预测能力,以厦门翔安机场高速公路的路面段为试验场地,选取分别代表振压过程中谐波比、能量和力学变化的压实控制值CCV、耗散测量值DMV、振动压实值VCV以及温度作为监测指标,采用孤立森林算法进行监测指标异常点识别,基于最小偏二乘回归建立多指标沥青路面压实密度预测模型.结果表明:孤立森林算法可有效识别高维数据异常点,弥补传统方法只能处理一维数据的不足;温度与其他监测指标以及沥青路面密度存在不同程度正相关关系;基于CCV、DMV、VCV的多元回归模型拟合性能优于一元回归模型性能,论证了多指标评价方法可行性;最小偏二乘回归可改善自变量间共线性对模型权重的影响,解决温度权重与实际物理意义相互颠倒的问题;相比普通多元线性回归,最小偏二乘回归能进一步提高模型拟合能力,模型最终在训练集上的决定系数为0.83,在测试集上的决定系数为0.81,具有良好的沥青路面压实密度预测能力.
Keyword ：
孤立森林 孤立森林 智能压实 智能压实 智能压实测量值 智能压实测量值 最小偏二乘回归 最小偏二乘回归 沥青路面 沥青路面
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| GB/T 7714 | 阙云 , 戴伊 , 薛斌 et al. 沥青路面压实密度多指标智能预测模型 [J]. | 湖南大学学报（自然科学版） , 2024 , 51 (11) : 147-157 . |
| MLA | 阙云 et al. "沥青路面压实密度多指标智能预测模型" . | 湖南大学学报（自然科学版） 51 . 11 (2024) : 147-157 . |
| APA | 阙云 , 戴伊 , 薛斌 , 章灿林 , 牟宏霖 , 袁燕 . 沥青路面压实密度多指标智能预测模型 . | 湖南大学学报（自然科学版） , 2024 , 51 (11) , 147-157 . |
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为解决软土地基具有较高的压缩性，孔隙水压力消散慢，地基稳定性差问题，基于反压护道原理，提出一种新的填筑施工方法——分块填筑法。通过有限元分析对比分块、传统分层2种填筑方式在路基路面的竖向沉降、水平位移、孔隙压力等方面的差异，并分析分块垛尺寸对路基顶面竖向位移的影响。研究表明，分块填筑能够有效减小路基顶面最大沉降值，分块垛越高、越宽路基顶面的竖向位移越小；分块填筑法对于路基顶面的水平位移影响不大，但能有效减小坡脚下方的水平位移、竖向位移以及孔隙压力。
Keyword ：
分块填筑 分块填筑 反压护道 反压护道 路基填筑 路基填筑 软土路基 软土路基
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| GB/T 7714 | 雷倪铭 , 郭成 , 林撼 et al. 一种新分块填筑施工法对软土路基的沉降影响 [J]. | 粘接 , 2024 , 51 (11) : 159-162 . |
| MLA | 雷倪铭 et al. "一种新分块填筑施工法对软土路基的沉降影响" . | 粘接 51 . 11 (2024) : 159-162 . |
| APA | 雷倪铭 , 郭成 , 林撼 , 阙云 , 邓泽庭 , 杨枫 . 一种新分块填筑施工法对软土路基的沉降影响 . | 粘接 , 2024 , 51 (11) , 159-162 . |
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To reveal the premature failure mechanism of polyurethane binder，it is used to optimize the formula and construction process. In this paper,by analyzing tensile strength,shear strength,bond strength,elongation at break,micro-morphology,and functional groups,the failure mechanism of polyurethane binder was summarized. The results showed that after 480 h aging,the elongation at break of hydrothermal aging was 2.44 times that of thermal oxygen aging,and the reduction ratio of bond strength and shear strength were 4.01 times and 8.95 times that of thermal oxygen aging,respectively. Moreover,the weakening effect of ultraviolet aging on tensile strength was much greater than the increase of strength after curing,and its aging rate was accelerated,resulting in an accelerated decrease in tensile strength. In addition,during the pavement construction process,it was necessary to ensure that the moisture content of cement pavement should be less than 4% as much as possible. Construction can continue after drying for about 24 h after rainfall. When the construction period is tight,a high-power floor-standing industrial fan or infrared heating truck can be used to reduce the water content of the road surface so as to ensure the construction quality of the polyurethane binder. © 2024 Hunan University. All rights reserved.
Keyword ：
aging of materials aging of materials failure analysis failure analysis polyurethanes polyurethanes UV aging UV aging
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| GB/T 7714 | Xu, S. , Wang, Y. , Wei, B. et al. Study on Premature Failure Mechanism of Polyurethane Paving Materials; [聚 氨 酯 铺 装 材 料 的 过 早 破 坏 机 制 研 究] [J]. | Journal of Hunan University Natural Sciences , 2024 , 51 (9) : 99-110 . |
| MLA | Xu, S. et al. "Study on Premature Failure Mechanism of Polyurethane Paving Materials; [聚 氨 酯 铺 装 材 料 的 过 早 破 坏 机 制 研 究]" . | Journal of Hunan University Natural Sciences 51 . 9 (2024) : 99-110 . |
| APA | Xu, S. , Wang, Y. , Wei, B. , Yuan, Y. , Que, Y. , Lin, C. . Study on Premature Failure Mechanism of Polyurethane Paving Materials; [聚 氨 酯 铺 装 材 料 的 过 早 破 坏 机 制 研 究] . | Journal of Hunan University Natural Sciences , 2024 , 51 (9) , 99-110 . |
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In practical engineering, the design process for most retaining walls necessitates careful consideration of seismic resistance. The prevention of retaining wall overturning is of paramount importance, especially in cases where the foundation's bearing capacity is limited. To research the seismic active earth pressure (ES) of a relieving retaining wall rotating around base (RB), the shear dissipation graphs across various operating conditions are analyzed by using Optum software, and the earth pressure in each region was derived by the inclined strip method combined with the limit equilibrium method. By observing shear dissipation graphs across various operating conditions, the distribution law of each sliding surface is summarized, and three typical failure modes are obtained. The corresponding calculation model was established. Then the resultant force and its action point were obtained. By comparing the theoretical and numerical solutions with the previous studies, the correctness of the derived formula is proved. The variation of earth pressure distribution and resultant force under seismic acceleration are studied. The unloading plate's position, the wall heel's length, and seismic acceleration will weaken the unloading effect. On the contrary, the length of the unloading plate and the friction angle of the filling will strengthen the unloading effect. The derived formula proposed in this study demonstrates a remarkable level of accuracy under both static and seismic loading conditions. Additionally, it serves as a valuable design reference for the prevention of overturning in relieving retaining walls.
Keyword ：
active earth pressure active earth pressure inclined slice method inclined slice method RB displacement mode RB displacement mode relief shelf retaining wall relief shelf retaining wall seismic acceleration seismic acceleration
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| GB/T 7714 | Que, Yun , Zhang, Jisong , Long, Chengcheng et al. Pseudo-static solution of active earth pressure against relief shelf retaining wall rotating around heel [J]. | GEOMECHANICS AND ENGINEERING , 2024 , 39 (1) : 87-104 . |
| MLA | Que, Yun et al. "Pseudo-static solution of active earth pressure against relief shelf retaining wall rotating around heel" . | GEOMECHANICS AND ENGINEERING 39 . 1 (2024) : 87-104 . |
| APA | Que, Yun , Zhang, Jisong , Long, Chengcheng , Chen, Fuquan . Pseudo-static solution of active earth pressure against relief shelf retaining wall rotating around heel . | GEOMECHANICS AND ENGINEERING , 2024 , 39 (1) , 87-104 . |
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