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学者姓名：戴福初
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Abstract ：
地震诱发滑坡分布呈现"背坡面"效应的特点,表明地震波入射方向对边坡动力响应及失稳有巨大的影响,然而斜入射下边坡动力响应研究尚不充分.本文基于时域弹性波理论和黏弹性人工边界条件,利用FLAC3D内嵌的Fish语言编程实现了 P波倾斜入射.通过对比算例与理论解,验证了 P波倾斜入射方法的准确性.研究了简谐波、加窗简谐波及天然地震波对单面坡激发的动力响应,并以加窗简谐波为例探索了输入波频率与入射角影响下单面坡(坡高90 m)的动力响应特征.计算结果表明:由于输入波首尾速度非零的冲击效应,简谐波作用下坡肩位置波首与波尾段峰值加速度值超过中间稳定段的1倍以上.简谐波和加窗简谐波在坡表相同部位产生的加速度响应要强于天然地震波.加窗简谐波20°入射下,坡体水平向加速度分布随输入波频率变化较竖直向的显著;当输入波频率为10 Hz时,坡肩位置峰值加速度出现最大值,约为输入波幅值的3.33倍,此时边坡高度与边坡动力响应垂向放大的临界高度一致.频率为2.5 Hz的加窗简谐波在不同入射角下,边坡竖直向加速度分布的变化高于水平向;当入射角为60°时,坡肩位置峰值加速度出现最大值,约为输入波幅值的3.12倍.研究表明垂直入射时会低估地震波对边坡动力扰动的影响.
Keyword ：
P波斜入射 P波斜入射 FLAC3D FLAC3D 边坡动力响应 边坡动力响应 数值模拟 数值模拟
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| GB/T 7714 | 谷坤生 , 周剑 , 戴福初 et al. 地震P波倾斜入射下单面坡动力响应分析 [J]. | 地球物理学报 , 2024 , 67 (6) : 2350-2363 . |
| MLA | 谷坤生 et al. "地震P波倾斜入射下单面坡动力响应分析" . | 地球物理学报 67 . 6 (2024) : 2350-2363 . |
| APA | 谷坤生 , 周剑 , 戴福初 , 张路青 . 地震P波倾斜入射下单面坡动力响应分析 . | 地球物理学报 , 2024 , 67 (6) , 2350-2363 . |
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Abstract ：
Landslides resulting in complete river blockage have frequently occurred in the Three River Region (TRR) during the geomorphological evolution of the Tibetan Plateau. River-damming landslides occurring in low-relief regions of the TRR have received less attention compared to those in deeply-incised valleys. The 2.5 Mm3 Cuoduoqin rockslide originated from the south-facing hillslope of a southeast-east-trending ridge, leading to complete blockage of the Quzhaqu River. The original failure mainly involves blocky metamorphic limestone and phyllite. The Quzha Lake Fault providing rear rupture and two other groups of joints facilitating sidewise and toe releases are considered predisposing factors contributing to slope instability. Ongoing tectonic uplift and cyclic glaciations are considered preparatory factors, shifting the slope from stable to marginally unstable. A prehistoric earthquake, likely corresponding to an ancient rupture event on the active Nujiang Fault Zone (NJFZ), is deemed as the most probable trigger for this large rock slope failure. The 2D discrete element method (DEM) software UDEC is utilized to analyze the static slope stability and to reproduce the kinematic process of the rockslide. The static analysis indicates that the original rock slope was in equilibrium under natural conditions. The kinematic process can be divided into three phases: initial detachment within seconds after applying seismic load, downslope acceleration after crossing the slope knickpoint, and accumulation after traveling into the valley bottom. This case study, focusing on the development and kinematics of the Cuoduoqin rockslide, can help enhance the understanding of effective risk assessments of landslides in high-altitude and low-relief regions.
Keyword ：
High Three River Region High Three River Region Kinematic process Kinematic process Discrete element simulation Discrete element simulation River-damming landslide River-damming landslide
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| GB/T 7714 | Ke, Zunhong , Dai, Fuchu , Zhao, Siyuan . Development and kinematics of the river-damming Cuoduoqin rockslide in the high Three River Region, southeastern Tibetan Plateau [J]. | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2024 , 83 (11) . |
| MLA | Ke, Zunhong et al. "Development and kinematics of the river-damming Cuoduoqin rockslide in the high Three River Region, southeastern Tibetan Plateau" . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 83 . 11 (2024) . |
| APA | Ke, Zunhong , Dai, Fuchu , Zhao, Siyuan . Development and kinematics of the river-damming Cuoduoqin rockslide in the high Three River Region, southeastern Tibetan Plateau . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2024 , 83 (11) . |
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Abstract ：
Exploring freeze-thaw landslide susceptibility on the Qinghai-Tibet Plateau (QTP) under warming-humidifying climate is greatly important for preventing and mitigating the risks of landslide hazards on engineering facilities. This study proposed a random forest-based freeze-thaw landslide susceptibility assessment model, where annual rainfall, annual average air temperature (AAAT), slope gradient, normalized difference vegetation index (NDVI), elevation, lithology, and plan curvature were fully considered. Selecting a study area of 324 km2 on the seasonally frozen ground (SFG) of QTP with 1059 freeze-thaw landslides, the model accuracy was validated. Low, moderate, high, and very high susceptibility zones were precisely classified, which accounted for 27.0, 27.5, 28.3, and 17.2%, respectively. Furthermore, its future development was explored under warming, humidifying, and warming-humidifying climates. Results indicated that when the AAAT or annual rainfall increased by 1.16 degrees C or 20 mm, both high and very high susceptibility zones increased by 2.0 or 1.0%, respectively. When AAAT and annual rainfall simultaneously increased by 1.16 degrees C and 20 mm, a higher increase in the high and very high susceptibility zones of 2.8% occurred. It was noteworthy that climate warming transitioned low and moderate susceptibility zones into high and very high susceptibility zones. These areas where freeze-thaw landslide susceptibility changed featured the AAAT of 4.29-6.15 degrees C, annual rainfall of 528.9-552.3 mm, slope gradient of 16-25 degrees, and elevation of 3750-3940 m. Compared to climate warming, the humidifying climate and warming-humidifying climate expanded moderate susceptibility zones, and areas where freeze-thaw landslide susceptibility changed featured the gentler slope gradients of 8-16 degrees. This study can provide a better guidance for safe engineering constructions influenced by freeze-thaw landslides on the QTP.
Keyword ：
Freeze-thaw landslide Freeze-thaw landslide Qinghai-Tibet Plateau Qinghai-Tibet Plateau Landslide susceptibility assessment Landslide susceptibility assessment Warming and humidifying climate Warming and humidifying climate
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| GB/T 7714 | Guo, Yanchen , Zhang, Zhihong , Dai, Fuchu . Freeze-thaw landslide susceptibility assessment and its future development on the seasonally frozen ground of the Qinghai-Tibet Plateau under warming-humidifying climate [J]. | COLD REGIONS SCIENCE AND TECHNOLOGY , 2024 , 227 . |
| MLA | Guo, Yanchen et al. "Freeze-thaw landslide susceptibility assessment and its future development on the seasonally frozen ground of the Qinghai-Tibet Plateau under warming-humidifying climate" . | COLD REGIONS SCIENCE AND TECHNOLOGY 227 (2024) . |
| APA | Guo, Yanchen , Zhang, Zhihong , Dai, Fuchu . Freeze-thaw landslide susceptibility assessment and its future development on the seasonally frozen ground of the Qinghai-Tibet Plateau under warming-humidifying climate . | COLD REGIONS SCIENCE AND TECHNOLOGY , 2024 , 227 . |
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Abstract ：
黄土塬区的农业灌溉致使地下水位不断升高，诱发了一系列黄土滑坡灾害。为探究灌溉水在黄土中的入渗过程，在陕西泾阳南塬开展了场地直径为20 m的原位浸水试验，监测得到了土体含水率和基质吸力的时空变化特征，并通过数值计算分析了浸水及间歇灌溉时水分的入渗规律。研究表明：塬边黄土的浸水入渗过程可分为均匀入渗、优势入渗和稳定入渗3个阶段，马兰黄土中存在竖向裂隙，当裂隙宽度大于2 mm且裂隙上部土体饱和后产生优势入渗；古土壤（S_(1)）下部透水性较上部弱，湿润峰抵达S_(1)下部时水分聚集而产生瞬态滞水；三维入渗数值计算再现了浸水入渗过程，多次灌溉条件下湿润锋的叠加效应促进水分入渗，且入渗强度随深度增加而减...
Keyword ：
基质吸力 基质吸力 含水率 含水率 黄土 黄土 现场监测 现场监测 灌溉入渗 灌溉入渗
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| GB/T 7714 | 赵志强 , 戴福初 , 闵弘 et al. 原状黄土-古土壤中水分入渗过程研究 [J]. | 岩土力学 , 2021 , (09) : 1-12 . |
| MLA | 赵志强 et al. "原状黄土-古土壤中水分入渗过程研究" . | 岩土力学 09 (2021) : 1-12 . |
| APA | 赵志强 , 戴福初 , 闵弘 , 谭晔 . 原状黄土-古土壤中水分入渗过程研究 . | 岩土力学 , 2021 , (09) , 1-12 . |
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Abstract ：
滑坡涌浪是库区最常见的自然灾害之一,为了对库区滑坡涌浪的灾害范围进行更加准确、高效的模拟,基于Sassa滑坡运动模型、COMCOT海啸模型及其开源有限差分程序、流体力学建立了流动性滑坡涌浪动力学模型.为了使模型能更好地反映滑坡涌浪的实际运动,模型考虑了滑坡涌浪的强烈耦合作用力、波浪破碎等因素对滑坡涌浪运动的影响,并通过龚家方滑坡涌浪案例验证了模型的有效性.模拟结果表明:①模拟得到滑坡的运动过程、堆积体形态、涌浪的产生、传播、爬坡与野外观测情况基本吻合;②由于岸边波能集聚,涌浪的岸边爬坡波高比河道内的波高更高;③爬坡波高在沿程递减的同时也存在波动,这与观测点的具体地形条件有关.由于模拟结果与野外观测情况相符,因此可将该模型应用于类流体滑坡涌浪的模拟,该模型的模拟结果可为类流体滑坡涌浪灾害防治工作提供参考依据.
Keyword ：
动力学模型 动力学模型 类流体滑坡 类流体滑坡 有限差分法 有限差分法 耦合作用力 耦合作用力 滑坡涌浪 滑坡涌浪 波浪破碎 波浪破碎
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| GB/T 7714 | 岳霞 , 戴福初 , 朱杰 et al. 一种改进的滑坡涌浪动力学模型 [J]. | 长江科学院院报 , 2021 , 38 (4) : 94-101 . |
| MLA | 岳霞 et al. "一种改进的滑坡涌浪动力学模型" . | 长江科学院院报 38 . 4 (2021) : 94-101 . |
| APA | 岳霞 , 戴福初 , 朱杰 , 朱雨轩 . 一种改进的滑坡涌浪动力学模型 . | 长江科学院院报 , 2021 , 38 (4) , 94-101 . |
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Abstract ：
巨型滑坡全球不常见,但是破坏性极强,其识别对于加深区域构造背景的认识、防灾减灾和工程建设均有指导意义。基于遥感解译、无人机地形测绘和现场调查,报道了新发现的八宿巨型滑坡及其残留堆积体特征,初步分析了成因机制与演变过程,估算了滑坡方量。主要结论如下:1)八宿滑坡发育于怒江缝合带的夏里—八宿裂谷带内,岩性以古生界嘉玉桥岩群大理岩组和侏罗系马里组变质砂泥岩为主,上部岩层产状为陡倾顺坡向,下部岩层产状为陡倾逆坡向,岸坡结构总体上为上硬下软。2)滑坡区横跨冷曲的左右两岸,长约7 200 m,宽约4 800 m,面积约22.5 km~2,估算方量约35×10~8 m~3,目前残余方量约14×10~8 m~...
Keyword ：
方量估算 方量估算 成因与演变 成因与演变 堆积特征 堆积特征 防灾意义 防灾意义 八宿巨型滑坡 八宿巨型滑坡
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| GB/T 7714 | 邓建辉 , 高云建 , 姚鑫 et al. 八宿巨型滑坡的发现及其意义 [J]. | 工程科学与技术 , 2021 , 53 (03) : 19-28 . |
| MLA | 邓建辉 et al. "八宿巨型滑坡的发现及其意义" . | 工程科学与技术 53 . 03 (2021) : 19-28 . |
| APA | 邓建辉 , 高云建 , 姚鑫 , 戴福初 , 任开瑀 , 王飞 et al. 八宿巨型滑坡的发现及其意义 . | 工程科学与技术 , 2021 , 53 (03) , 19-28 . |
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Abstract ：
一种改进的滑坡涌浪动力学模型
Keyword ：
滑坡涌浪 滑坡涌浪 动力学模型 动力学模型 类流体滑坡 类流体滑坡 有限差分法 有限差分法 波浪破碎 波浪破碎 耦合作用力 耦合作用力
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| GB/T 7714 | 岳霞 , 戴福初 , 朱杰 et al. 一种改进的滑坡涌浪动力学模型 [J]. | 岳霞 , 2021 , 38 (4) : 94-101 . |
| MLA | 岳霞 et al. "一种改进的滑坡涌浪动力学模型" . | 岳霞 38 . 4 (2021) : 94-101 . |
| APA | 岳霞 , 戴福初 , 朱杰 , 朱雨轩 , 长江科学院院报 . 一种改进的滑坡涌浪动力学模型 . | 岳霞 , 2021 , 38 (4) , 94-101 . |
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Abstract ：
八宿巨型滑坡的发现及其意义
Keyword ：
堆积特征 堆积特征 防灾意义 防灾意义 成因与演变 成因与演变 方量估算 方量估算 八宿巨型滑坡 八宿巨型滑坡
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| GB/T 7714 | 邓建辉 , 高云建 , 姚鑫 et al. 八宿巨型滑坡的发现及其意义 [J]. | 邓建辉 , 2021 , 53 (3) : 19-28 . |
| MLA | 邓建辉 et al. "八宿巨型滑坡的发现及其意义" . | 邓建辉 53 . 3 (2021) : 19-28 . |
| APA | 邓建辉 , 高云建 , 姚鑫 , 戴福初 , 任开瑀 , 王飞 et al. 八宿巨型滑坡的发现及其意义 . | 邓建辉 , 2021 , 53 (3) , 19-28 . |
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Abstract ：
Soft-sediment deformation structures (SSDSs) are widely developed in the lacustrine sediments of paleo-dammed lakes in tectonically active regions and contain a wealth of information on regional fault activity. In this study, multiple SSDSs (load structures, small-scale slump structures, droplets, diapir and pillow structures, silty-clay pillars and large-scale slump structures) were identified in the strata of the Late Pleistocene lacustrine sedi-ments in the Tashkorgan River drainage in northeaster n Pamir. The deformation mechanisms of the SSDSs were related to the liquefaction, fluidization and thixotropic behaviors. The regional tectonic settings and SSDS fea-tures point toward a trigger mechanism with seismic activities and indicate that the seismogenic faults were possibly related to the southern part of the Kongur Shan extensional system. Accelerator mass spectrometr y (AMS) radiocarbon dating data showed that the SSDSs in the Tashkorgan lacustrine sediments formed 30,221-29,932 cal BP and 25,825-25,317 cal BP. The results of this study improve ou r understanding of fault activity and geodynamic processes in northeaster n Pamir during the Late Pleistocene.
Keyword ：
Soft-sediment deformation structure Soft-sediment deformation structure Paleo-earthquake Paleo-earthquake Pamir Pamir Late Pleistocene Late Pleistocene Lacustrine sediment Lacustrine sediment
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| GB/T 7714 | Liang, Lianji , Qiao, Xiufu , Dai, Fuchu et al. Seismically triggered soft-sediment deformation structures in Tashkorgan lacustrine sediments, northeastern Pamir, China [J]. | QUATERNARY INTERNATIONAL , 2021 , 604 : 82-92 . |
| MLA | Liang, Lianji et al. "Seismically triggered soft-sediment deformation structures in Tashkorgan lacustrine sediments, northeastern Pamir, China" . | QUATERNARY INTERNATIONAL 604 (2021) : 82-92 . |
| APA | Liang, Lianji , Qiao, Xiufu , Dai, Fuchu , Zhong, Ning , Jiang, Hanchao . Seismically triggered soft-sediment deformation structures in Tashkorgan lacustrine sediments, northeastern Pamir, China . | QUATERNARY INTERNATIONAL , 2021 , 604 , 82-92 . |
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Abstract ：
Frequent agricultural irrigation triggers numerous landslides in the loess platform, northwest China. We conducted a field infiltration experiment with a diameter of 20 m on the South Jingyang tableland in Shaanxi province, China to better understand the infiltration process in thick unsaturated loess. Soil moisture probes, tensiometers, and differential pressure transducers were installed at various depths to monitor the infiltration process. The results showed that the initially high infiltration rate gradually decreased and finally approached a constant value less than that of the saturated hydraulic conductivity of the top soil. Matric suction decreased rapidly, and the volumetric water content increased to a nearly saturated state with the arrival of the wetting front. The soil water characteristic curve obtained from field monitoring data agreed with that from laboratory tests performed on undisturbed specimens. Preferential flow associated with vertical cracks parallel to the margin of the platform was observed in the late Pleistocene Loess layer (L-1), and an empirical model was developed from monitoring recordings to explain preferential flow formation. A transient perched water table formed above the lower part of the first paleosol layer (S-1). The monitored pore-air pressure increased and then fluctuated before the arrival of the wetting front. The maximum value of pore-air pressure at different depths was less than 5 kPa and tended to increase linearly with dry density. The results of this research help understand the migration of irrigation water in thick unsaturated loess and the recharge mechanism of the deep groundwater table.
Keyword ：
Field monitoring Field monitoring Infiltration process Infiltration process Preferential flow Preferential flow Loess Loess Wetting front Wetting front Pore-air pressure Pore-air pressure
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| GB/T 7714 | Zhao, Zhiqiang , Dai, Fuchu , Min, Hong et al. Field infiltration of artificial irrigation into thick loess [J]. | ENGINEERING GEOLOGY , 2021 , 294 . |
| MLA | Zhao, Zhiqiang et al. "Field infiltration of artificial irrigation into thick loess" . | ENGINEERING GEOLOGY 294 (2021) . |
| APA | Zhao, Zhiqiang , Dai, Fuchu , Min, Hong , Tu, Xinbin . Field infiltration of artificial irrigation into thick loess . | ENGINEERING GEOLOGY , 2021 , 294 . |
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