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摘要 ：
一种改进的滑坡涌浪动力学模型
关键词 ：
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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摘要 ：
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...
关键词 ：
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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摘要 ：
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~...
关键词 ：
八宿巨型滑坡 八宿巨型滑坡 堆积特征 堆积特征 成因与演变 成因与演变 方量估算 方量估算 防灾意义 防灾意义
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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 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
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.
关键词 ：
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
引用：
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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 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
八宿巨型滑坡的发现及其意义
关键词 ：
八宿巨型滑坡 八宿巨型滑坡 堆积特征 堆积特征 成因与演变 成因与演变 方量估算 方量估算 防灾意义 防灾意义
引用：
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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 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
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.
关键词 ：
Lacustrine sediment Lacustrine sediment Late Pleistocene Late Pleistocene Paleo-earthquake Paleo-earthquake Pamir Pamir Soft-sediment deformation structure Soft-sediment deformation structure
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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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摘要 ：
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.
关键词 ：
Field monitoring Field monitoring Infiltration process Infiltration process Loess Loess Pore-air pressure Pore-air pressure Preferential flow Preferential flow Wetting front Wetting front
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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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摘要 ：
The present study provided a preliminary investigation on the kinetic and fragmentation characteristics of the Xuzha rock avalanche, a ridge-top rock avalanche located in the southeast of the Tibetan Plateau, China. Field investigation revealed that the Xuzha rock avalanche originated from a steep slope and caused the tributary of the Jinsha River dammed, showing an extreme high mobility. The vertical profile of avalanche debris showed that it experienced intensive fragmentation during transport. To back-analyze its kinetic and fragmentation processes, the discrete element modeling was conducted. Simulation results suggested that the Xuzha rock avalanche lasted about 80 s and had a maximum velocity of ~ 73 m/s, about 1.5 times the highest average velocity (48 m/s). The travel distance and the thickness of the deposits matched well with the field observations. Notable features including the preservation of the original positional order and the inverse vertical grading of avalanche debris obtained from the simulation were consistent with the field observations. The statistical results of fragments showed that the fragment size distributions could be described by Weibull distribution. In general, with the landslide propagation, the size of fragments gradually decreased and the fragment size distribution became narrower. Further, dynamic fragmentation continuously occurred with the landslide propagation, generating an abundance of fine-grain particles which behaved as interstitial granular fluids between coarse particles. Finally, we inferred that dynamic rock fragmentation and fine particle fluidization were the reasonable explanations for the high mobility of the Xuzha rock avalanche. © 2021, Springer-Verlag GmbH Germany, part of Springer Nature.
关键词 ：
Debris Debris Fluidization Fluidization Grading Grading Kinetics Kinetics Landslides Landslides Particle size analysis Particle size analysis Rock bursts Rock bursts Rocks Rocks Size distribution Size distribution Weibull distribution Weibull distribution
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| GB/T 7714 | Zhu, Yuxuan , Dai, Fuchu . Insights into the kinetic and fragmentation characteristics of a ridge-top rock avalanche based on field investigation and discrete element simulation [J]. | Bulletin of Engineering Geology and the Environment , 2021 , 80 (3) : 2085-2099 . |
| MLA | Zhu, Yuxuan et al. "Insights into the kinetic and fragmentation characteristics of a ridge-top rock avalanche based on field investigation and discrete element simulation" . | Bulletin of Engineering Geology and the Environment 80 . 3 (2021) : 2085-2099 . |
| APA | Zhu, Yuxuan , Dai, Fuchu . Insights into the kinetic and fragmentation characteristics of a ridge-top rock avalanche based on field investigation and discrete element simulation . | Bulletin of Engineering Geology and the Environment , 2021 , 80 (3) , 2085-2099 . |
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摘要 ：
青藏高原的怒江、澜沧江和金沙江泛三江并流区是青藏高原地质环境研究和自然资源开发的关键带,因此,全覆盖地调查该区活动性滑坡,研究其发育分布规律具有重要意义。以泛三江并流区17.9×104 km~2研究区为例,示范了In SAR大数据处理→滑坡解译→发育规律分析→重点区段剖析的滑坡In SAR调查工作流程和关键技术,获得了研究区海拔4 000 m以下的的活动性滑坡数据。结果表明:1)现有的SAR数据源、InSAR技术和解译方法可以满足开展大区域中小比例尺活动性滑坡识别的需求,开展全国滑坡InSAR调查时机已经成熟;2)设计的"相位共振增强PRE-InSAR"技术,针对大冗余SAR观测的快速计算,可...
关键词 ：
泛三江并流区 泛三江并流区 活动滑坡 活动滑坡 青藏高原 青藏高原 发育规律 发育规律 InSAR InSAR 滑坡识别 滑坡识别
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| GB/T 7714 | 姚鑫 , 邓建辉 , 刘星洪 et al. 青藏高原泛三江并流区活动性滑坡InSAR初步识别与发育规律分析 [J]. | 工程科学与技术 , 2020 , 52 (05) : 16-37 . |
| MLA | 姚鑫 et al. "青藏高原泛三江并流区活动性滑坡InSAR初步识别与发育规律分析" . | 工程科学与技术 52 . 05 (2020) : 16-37 . |
| APA | 姚鑫 , 邓建辉 , 刘星洪 , 周振凯 , 姚佳明 , 戴福初 et al. 青藏高原泛三江并流区活动性滑坡InSAR初步识别与发育规律分析 . | 工程科学与技术 , 2020 , 52 (05) , 16-37 . |
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摘要 ：
高速远程滑坡作为一种特殊的地质灾害,具有运动速度快、滑动距离远、致灾范围广等特征,一旦发生往往给人类的生命财产带来巨大的损失,因此,针对其超强运动机制的研究一直受到国内外滑坡领域的高度关注。液化减阻作为高速远程滑坡发生超强运动的一个重要机制,强调滑坡运动过程中出现超孔隙水压力累积、有效应力降低等液化行为,导致滑坡基底摩擦系数减小,发生高速远程运动。本文根据前人研究结果对液化的影响因素和高速远程滑坡的液化机制进行总结,将不排水加载作用下滑坡的液化机制归纳为结构液化和滑动带液化两种;并基于详细的现场调查对青藏高原地区两类典型的液化型高速远程滑坡(玉树滑坡和乱石包滑坡)的形成机制进行了初步分析。结果...
关键词 ：
高速远程滑坡 高速远程滑坡 运动机制 运动机制 液化 液化 青藏高原 青藏高原
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| GB/T 7714 | 朱雨轩 , 戴福初 , 梁莲姬 . 青藏高原典型液化型高速远程滑坡形成机制分析 [J]. | 工程科学与技术 , 2020 , 52 (06) : 10-21 . |
| MLA | 朱雨轩 et al. "青藏高原典型液化型高速远程滑坡形成机制分析" . | 工程科学与技术 52 . 06 (2020) : 10-21 . |
| APA | 朱雨轩 , 戴福初 , 梁莲姬 . 青藏高原典型液化型高速远程滑坡形成机制分析 . | 工程科学与技术 , 2020 , 52 (06) , 10-21 . |
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