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学者姓名：王浩
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Abstract ：
风化土作为花岗岩二元结构边坡的主要物源,厘清其内部侵蚀特性是开展该类边坡破坏模式与促滑机理研究的基础.地下水渗流作用下花岗岩风化土的内部侵蚀包括细颗粒迁移、淤塞等过程,本文设计制作侧向渗透模型,开展不同动水头与坡度条件下花岗岩风化土的侧向渗流试验,并结合精细化数值模拟研究内部侵蚀发展特征与细颗粒的运移规律.结果表明:花岗岩风化土的内部侵蚀是渐进发展的过程,倾斜角度越陡、水头变化幅度越大,则土体内部侵蚀越强烈,细颗粒的流失量就越大;风化土流失的细颗粒与软弱带土层的矿物组分基本一致,表明差异风化界面的软弱带是渗流作用下花岗岩风化土中细颗粒迁移沉积形成;细颗粒迁移导致的土体颗粒粗化、细颗粒沉积导致的基覆界面软化是花岗岩二元结构边坡失稳的主要原因.厘清花岗岩风化土内部侵蚀的作用机制,研究结果可为花岗岩边坡失稳预测与防灾减灾提供理论依据.
Keyword ：
内部侵蚀 内部侵蚀 动水头 动水头 模型试验 模型试验 花岗岩风化土 花岗岩风化土
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| GB/T 7714 | 王浩 , 严耿明 , 李传东 et al. 动水头作用下花岗岩风化土内部侵蚀试验研究 [J]. | 工程科学与技术 , 2025 , 57 (1) : 132-144 . |
| MLA | 王浩 et al. "动水头作用下花岗岩风化土内部侵蚀试验研究" . | 工程科学与技术 57 . 1 (2025) : 132-144 . |
| APA | 王浩 , 严耿明 , 李传东 , 黄瑛瑛 , 张智超 . 动水头作用下花岗岩风化土内部侵蚀试验研究 . | 工程科学与技术 , 2025 , 57 (1) , 132-144 . |
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Rainfall-induced landslides are widely distributed in many countries. Rainfall impacts the hydraulic dynamics of groundwater and, therefore, slope stability. We derive an analytical solution of slope stability considering effective rainfall based on the Richards equation. We define effective rainfall as the total volume of rainfall stored within a given range of the unsaturated zone during rainfall events. The slope stability at the depth of interest is provided as a function of effective rainfall. The validity of analytical solutions of system states related to effective rainfall, for infinite slopes of a granite residual soil, is verified by comparing them with the corresponding numerical solutions. Additionally, three approaches to global sensitivity analysis are used to compute the sensitivity of the slope stability to a variety of factors of interest. These factors are the reciprocal of the air-entry value of the soil alpha, the thickness of the unsaturated zone L, the cohesion of soil c, the internal friction angle phi related to the effective normal stress, the slope angle beta, the unit weights of soil particles gamma(s), and the saturated hydraulic conductivity K-s. The results show the following: (1) The analytical solutions are accurate in terms of the relative differences between the analytical and the numerical solutions, which are within 5.00% when considering the latter as references. (2) The temporal evolutions of the shear strength of soil can be sequentially characterized as four periods: (i) strength improvement due to the increasing weight of soil caused by rainfall infiltration, (ii) strength reduction controlled by the increasing pore water pressure, (iii) strength reduction due to the effect of hydrostatic pressure in the transient saturation zone, and (iv) stable strength when all the soil is saturated. (3) The large alpha corresponds to high effective rainfall. (4) The factors ranked in descending order of sensitivity are as follows: alpha > L > c > beta > gamma(s) > K-s > phi.
Keyword ：
analytic solution analytic solution effective rainfall effective rainfall global sensitivity analysis global sensitivity analysis shear strength shear strength slope stability slope stability
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| GB/T 7714 | Xia, Chuan-An , Zhang, Jing-Quan , Wang, Hao et al. Global Sensitivity Analysis of Slope Stability Considering Effective Rainfall with Analytical Solutions [J]. | WATER , 2025 , 17 (2) . |
| MLA | Xia, Chuan-An et al. "Global Sensitivity Analysis of Slope Stability Considering Effective Rainfall with Analytical Solutions" . | WATER 17 . 2 (2025) . |
| APA | Xia, Chuan-An , Zhang, Jing-Quan , Wang, Hao , Jian, Wen-Bin . Global Sensitivity Analysis of Slope Stability Considering Effective Rainfall with Analytical Solutions . | WATER , 2025 , 17 (2) . |
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We develop a reduced-order modeling strategy aimed at providing numerical Monte Carlo simulations of groundwater flow in randomly heterogeneous transmissivity fields. We rely on moment equations for groundwater flow and conduct space reductions for both transmissivity, T , and hydraulic head, h . A truncated singular value decomposition (SVD) solver is employed to cope with the ill-conditioned stiffness matrix caused by (negative and thus) unphysical values of T that might arise due to possible low accuracy stemming from the order of model reduction. The performance of the approach is assessed through the analysis of various synthetic reference scenarios. These encompass diverse degrees of heterogeneity of the transmissivity field and various values of reduced-order dimensions, n and m , associated with h and T , respectively. Transmissivity is conceptualized as a composite (spatial) random field where there is uncertainty in the locations of regions associated with diverse geomaterials as well as in the heterogeneity of transmissivity therein. Our results are also compared against their counterparts that one could obtain upon performing a model reduction solely on the basis of hydraulic heads. Our findings show that: (i) resting on the truncated SVD solver is beneficial for coping with ill- conditioned stiffness matrices; (ii) the two model reduction strategies provide comparable solution accuracy for m >= 5n, while (iii) the computational cost associated with the reduced-order model based on space reduction for both T and h is always significantly smaller than that associated with space reduction based solely on h .
Keyword ：
Groundwater Groundwater Moment equations Moment equations Monte Carlo simulation Monte Carlo simulation Reduced-order model Reduced-order model Truncated singular value decomposition Truncated singular value decomposition
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| GB/T 7714 | Xia, Chuan-An , Wang, Hao , Jian, Wenbin et al. Reduced-order Monte Carlo simulation framework for groundwater flow in randomly heterogeneous composite transmissivity fields [J]. | JOURNAL OF HYDROLOGY , 2025 , 651 . |
| MLA | Xia, Chuan-An et al. "Reduced-order Monte Carlo simulation framework for groundwater flow in randomly heterogeneous composite transmissivity fields" . | JOURNAL OF HYDROLOGY 651 (2025) . |
| APA | Xia, Chuan-An , Wang, Hao , Jian, Wenbin , Riva, Monica , Guadagnini, Alberto . Reduced-order Monte Carlo simulation framework for groundwater flow in randomly heterogeneous composite transmissivity fields . | JOURNAL OF HYDROLOGY , 2025 , 651 . |
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Due to rainfall, the soil-rock differential weathering interface of spherical weathered granite soil slopes is prone to evolve into a dominant seepage channel and undergo seepage suffosion, which accelerates the deformation and instability of these slopes. However, little research has been carried out on the characteristics of seepage suffosion and the migration of fine particles. Based on the unsaturated seepage theory of porous media, a numerical calculation framework is established to accurately describe the seepage suffosion process at the soil-rock interface, considering the coupling relationship between the fine particle migration, suffosion initiation response and unsaturated seepage. The finite element method is used to construct a seepage suffosion model for unsaturated granite residual soil under the effect of dominant flow. Based on the seepage suffosion process of homogeneous soil columns, the suffosion characteristics of dominant flow under three typical soil-rock interface burial states are systematically investigated. The results show that the soil-rock interface and the matrix permeability of spherical weathered granite soil slopes are highly variable, with the wetting front forming a downward depression infiltration funnel, and the degree of depression of the wetting front becomes more pronounced as rainfall continues. The degree of fine particle loss is related to the burial state of the soil-rock interface, in which the dominant flow potential suffosion of the under-filled soil condition is the most significant, and even excess pore water pressure occurs at the interface, which is the most unfavorable to the stability of this type of slope. The research results can provide a scientific basis for accurately evaluating the stability of spherical weathered granite soil slopes under rainfall conditions. © 2024 Biodiversity Research Center Academia Sinica. All rights reserved.
Keyword ：
Biodiversity Biodiversity Finite element method Finite element method Groundwater flow Groundwater flow Interface states Interface states Porous materials Porous materials Rain Rain Seepage Seepage Slope stability Slope stability Soils Soils Spheres Spheres Wetting Wetting
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| GB/T 7714 | Hong-Qiang, Dou , Sen-Hua, Xie , Wen-Bin, Jian et al. Characteristics of preferential flow suffosion of soil-rock interface in spherical weathered granite slopes [J]. | Rock and Soil Mechanics , 2024 , 45 (4) : 950-960 . |
| MLA | Hong-Qiang, Dou et al. "Characteristics of preferential flow suffosion of soil-rock interface in spherical weathered granite slopes" . | Rock and Soil Mechanics 45 . 4 (2024) : 950-960 . |
| APA | Hong-Qiang, Dou , Sen-Hua, Xie , Wen-Bin, Jian , Hao, Wang , Chao-Xu, Guo . Characteristics of preferential flow suffosion of soil-rock interface in spherical weathered granite slopes . | Rock and Soil Mechanics , 2024 , 45 (4) , 950-960 . |
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[目的]揭示动水头作用下花岗岩风化土侵蚀演化的动态过程，研究动态水力条件对土体内部侵蚀发展的影响，探明颗粒迁移规律与内部侵蚀机理，为深入研究花岗岩边坡的破坏模式与促滑机理提供理论依据。[方法]设计竖向土柱渗流装置，开展上升水头与正弦水头条件下花岗岩风化土柱的渗流试验，基于渗流土柱顶面与侧面的试验现象，从渗流速度变化、颗粒流失量变化和渗流前后颗粒级配、质量变化等方面，分析动水头作用下花岗岩风化土内部侵蚀的发育特征。[结果](1)花岗岩风化土粒径差异较大，在骨架间存在微小孔隙，渗流冲刷作用使得土颗粒通过土体骨架间的孔隙运移流失。在内部侵蚀过程中，细颗粒流失量相对较多，粗颗粒流失量较少。(2)土体内部侵蚀作用是渐进发展的过程，在土体薄弱区域的结构最先产生变形与破坏。试验中渗流泉眼由土柱边界开始发展到土柱中部区域，渗流通道沿着渗流方向自下而上发育，水力条件短时间内发生显著变化会造成渗流通道快速贯通。(3)土体内部侵蚀作用将随渗流时间推进而趋于稳定，但正弦水头将“激活”土颗粒运动，加剧土体的内部侵蚀作用。加大水头变化幅度或减小水头变化周期，能够加剧土体内部侵蚀作用，导致水流运移速度加快以及颗粒迁移流失量增多。[结论]水力条件变化对土体内部侵蚀作用存在显著影响，正弦水头更能加剧颗粒迁移流失。
Keyword ：
内部侵蚀 内部侵蚀 动水头 动水头 模型试验 模型试验 花岗岩风化土 花岗岩风化土
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| GB/T 7714 | 王浩 , 严耿明 , 李传东 et al. 动水头作用下花岗岩风化土的内部侵蚀机理 [J]. | 水土保持通报 , 2024 , 44 (02) : 80-90 . |
| MLA | 王浩 et al. "动水头作用下花岗岩风化土的内部侵蚀机理" . | 水土保持通报 44 . 02 (2024) : 80-90 . |
| APA | 王浩 , 严耿明 , 李传东 , 豆红强 . 动水头作用下花岗岩风化土的内部侵蚀机理 . | 水土保持通报 , 2024 , 44 (02) , 80-90 . |
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The tensile strength of roots and the friction characteristics of the root-soil interface of tree species are the indicators that play a crucial role in understanding the mechanism of soil reinforcement by roots. To calculate the effectiveness of the reinforcement of soil by tree roots based on essential influencing parameters, typical trees in the coastal region of southeastern China selected for this study were subjected to tests of the tensile mechanical properties of their roots, as well as studies on the friction characteristics of the root-soil interface and the microscopic interfaces. The results indicated that in the 1-7 diameter classes, the root tensile strength of both Pinus massoniana and Cunninghamia lanceolata was negatively correlated with the root diameter in accordance with the power function. The root tensile strength of these two trees, however, was positively correlated with the lignin content but negatively correlated with cellulose and hemicellulose contents. The shear strength at the root-soil interface and the vertical load exhibited a constitutive relationship, which followed the Mohr-Coulomb criterion. As the root diameter increased, both the cohesion and the friction coefficients at the root-soil interface gradually increased, but the growth rate stood at around 15%. The cohesion value of the root-soil interface of the two trees decreased linearly with the increase in soil moisture content within the range of 25 to 45%. At the microinterface, the root surface of C. lanceolata exhibited concave grooves and convex ridges that extended along the axial direction of roots, with their height differences increasing with the enlargement of the root diameter. The rough surface of P. massoniana roots had areas composed of polygonal meshes, with an increase observed in the mesh density with increasing root diameter.
Keyword ：
chemical composition chemical composition root-soil interface root-soil interface root surface microstructure root surface microstructure tensile strength tensile strength tree roots tree roots
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| GB/T 7714 | Lin, Yunzhao , Jian, Wenbin , Zhu, Zuteng et al. Study on the Mechanical Properties of Roots and Friction Characteristics of the Root-Soil Interface of Two Tree Species in the Coastal Region of Southeastern China [J]. | FORESTS , 2024 , 15 (8) . |
| MLA | Lin, Yunzhao et al. "Study on the Mechanical Properties of Roots and Friction Characteristics of the Root-Soil Interface of Two Tree Species in the Coastal Region of Southeastern China" . | FORESTS 15 . 8 (2024) . |
| APA | Lin, Yunzhao , Jian, Wenbin , Zhu, Zuteng , Wu, Yilong , Wang, Hao , Fan, Xiufeng . Study on the Mechanical Properties of Roots and Friction Characteristics of the Root-Soil Interface of Two Tree Species in the Coastal Region of Southeastern China . | FORESTS , 2024 , 15 (8) . |
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To investigate the influence of tree roots on the triggering mechanism of shallow landslides, this study focused on a typical vegetation-covered cluster landslide in the Wuping area of China. A tree root profile investigation and a double-ring infiltration test were conducted. The undisturbed soil samples were collected for laboratory tests to measure the influence of tree vegetation on soil physical and hydraulic properties. The root reinforcement effect is limited by the depth of root distribution, with over 90% of the roots situated above the slip surface. The presence of roots increases the resistance of the soil to disintegration. The soil disintegration in the 0-80 cm layer was less than 25% after 24 h of water immersion and the soil undergoes complete disintegration at a depth of 180-200 cm within 120 s. Tree roots facilitate the infiltration of soil, and Ks at 0 m was 11.21 times than that at 2 m, and the interface between soils with roots and soils without roots may become a sliding surface. Under extreme rainfall conditions, the root system promotes water infiltration, accelerates the softening and disintegration of the soil on the sliding surface, which adversely affects the stability of landslides.
Keyword ：
disintegration disintegration heavy rainfall heavy rainfall hydraulic property hydraulic property root-soil root-soil Shallow landslide Shallow landslide
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| GB/T 7714 | Lin, Yunzhao , Jian, Wenbin , Wu, Yilong et al. Effect of tree roots on heavy rainfall-induced shallow landslides [J]. | GEOMATICS NATURAL HAZARDS & RISK , 2024 , 15 (1) . |
| MLA | Lin, Yunzhao et al. "Effect of tree roots on heavy rainfall-induced shallow landslides" . | GEOMATICS NATURAL HAZARDS & RISK 15 . 1 (2024) . |
| APA | Lin, Yunzhao , Jian, Wenbin , Wu, Yilong , Zhu, Zuteng , Wang, Hao , Dou, Hongqiang et al. Effect of tree roots on heavy rainfall-induced shallow landslides . | GEOMATICS NATURAL HAZARDS & RISK , 2024 , 15 (1) . |
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闽东南高植被覆盖区台风暴雨型滑坡频发，探索在植被、降雨、强风作用下的滑坡失稳演化及其规律对揭示高植被覆盖区台风暴雨型滑坡的成灾机制、监测预警具有重要的理论及实际意义。以福建省永泰县洋斜滑坡为研究对象，对斜坡上的毛竹进行拉拔试验以及对根土区进行单环入渗试验，结合Green-Ampt模型和无限边坡模型，研究在台风暴雨作用下植被土坡的稳定性响应规律及其稳定性分析方法。结果表明：（1）毛竹抵御的极限风速主要在18～30 m/s的范围之内，对应8～11级风力范围。（2）毛竹迎风区土体入渗能力随着风速的增长而增长，0～12 m/s内入渗能力基本不变，12 m/s以上入渗能力迅速增长。（3）根土区湿润锋的迁移速度随着风速和降雨强度的增大而加快，台风通过植被扰动土体形成优势渗流，对入渗的影响主要在于加快了湿润锋的迁移速度。风-雨-植被协同作用下，风速是影响土体入渗能力的重要因素。（4）台风暴雨作用下风荷载通过植被加快根区土降雨入渗，从而增大湿润锋迁移速度，是台风暴雨型滑坡孕灾、成灾的重要环节。
Keyword ：
湿润锋 湿润锋 滑坡 滑坡 边坡稳定性 边坡稳定性 降雨 降雨 风荷载 风荷载
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| GB/T 7714 | 林滨强 , 章德生 , 简文彬 et al. 风驱雨作用下植被斜坡稳定性响应研究 [J]. | 岩土力学 , 2024 , (09) . |
| MLA | 林滨强 et al. "风驱雨作用下植被斜坡稳定性响应研究" . | 岩土力学 09 (2024) . |
| APA | 林滨强 , 章德生 , 简文彬 , 豆红强 , 王浩 , 樊秀峰 . 风驱雨作用下植被斜坡稳定性响应研究 . | 岩土力学 , 2024 , (09) . |
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为研究菌胶比对微生物固化黏土效果的影响，选用巴氏生孢八叠球菌作为固化菌种，设置三组不同菌胶比的试验开展微生物固化黏土试验，通过直剪试验、无侧限抗压试验研究改性土体的力学性能，并在此基础上采用酸洗法测量固化土的碳酸钙生成量，与清水对照组对比分析微生物固化黏土的效果。试验结果表明：采用的方法可有效加固黏土，生物固化后试样的抗剪强度和无侧限抗压强度均明显优于清水对照组；菌胶比等于1的土体强度提升幅度最大，菌胶比等于2时次之，等于0.5时最低，力学强度随着菌胶比增加而呈现先增大后减小的趋势；碳酸钙生成量与土体强度之间呈现正相关关系，菌胶比会影响碳酸钙生成量进而影响黏土加固效果。说明菌胶比对微生物固化黏土效果影响较大，优化菌胶比对提升微生物固土强度具有重要作用。
Keyword ：
微生物固化 微生物固化 无侧限抗压强度 无侧限抗压强度 直剪试验 直剪试验 菌胶比 菌胶比 黏土 黏土
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| GB/T 7714 | 陈垚 , 王重卿 , 王浩 et al. 菌胶比影响微生物固化黏土的效果分析 [J]. | 水利与建筑工程学报 , 2024 , 22 (04) : 175-180 . |
| MLA | 陈垚 et al. "菌胶比影响微生物固化黏土的效果分析" . | 水利与建筑工程学报 22 . 04 (2024) : 175-180 . |
| APA | 陈垚 , 王重卿 , 王浩 , 李流芳 , 赖国正 , 李熙 et al. 菌胶比影响微生物固化黏土的效果分析 . | 水利与建筑工程学报 , 2024 , 22 (04) , 175-180 . |
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变密度地下水流系统受水力梯度和密度梯度共同驱动，非线性强，数值模型计算量大，尤其在开展不确定性分析时需要的计算成本很高。常规的数据驱动机器学习方法只能对点监测信息进行模拟分析，不能模拟整个地下水流系统。本研究发展了变密度地下水流降阶模型，利用高斯过程模型对降阶模型的数值误差进行修正组成耦合模型。耦合模型既能克服高斯过程只能模拟有限监测点信息的缺陷，又能提高降阶模型对监测点信息的模拟精度。考虑二维剖面变密度地下水流案例，将渗透系数场设定为空间随机变量，采用基于全阶模型（FSMC）、降阶模型（ROMC）和耦合模型（GP-ROMC）3种蒙特卡罗模拟方法进行不确定分析。研究结果表明：（1）ROMC能替代FSMC开展不确定性分析；（2）水头和盐度的平均相对二范误差与降阶模型维度的关系可用指数函数描述（决定性系数R2≥0.99）；（3）GP-ROMC对监测点信息的模拟精度比ROMC高，GP-ROMC可有效修正降阶模型误差提高蒙特卡罗模拟的精度。研究成果可为地下水建模、不确定性分析、风险评估及参数反演等工作提供重要技术支撑。
Keyword ：
变密度地下水流 变密度地下水流 地下水 地下水 蒙特卡罗模拟 蒙特卡罗模拟 降阶模型 降阶模型 高斯过程 高斯过程
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| GB/T 7714 | 夏传安 , 樊秀峰 , 王浩 et al. 耦合变密度地下水流降阶模型与高斯过程的蒙特卡罗模拟 [J]. | 水文地质工程地质 , 2024 , 51 (5) : 1-13 . |
| MLA | 夏传安 et al. "耦合变密度地下水流降阶模型与高斯过程的蒙特卡罗模拟" . | 水文地质工程地质 51 . 5 (2024) : 1-13 . |
| APA | 夏传安 , 樊秀峰 , 王浩 , 简文彬 . 耦合变密度地下水流降阶模型与高斯过程的蒙特卡罗模拟 . | 水文地质工程地质 , 2024 , 51 (5) , 1-13 . |
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