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学者姓名：戴福初
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摘要 ：
Soft sediment deformation structures (SSDSs) in lacustrine sediments could record paleoearthquakes in tectonically active areas. However, their interpretations of deformation and triggering mechanisms still exist disagreement due to the lack of understanding of natural formation processes of SSDSs. In this study, two large shaking table experiments of saturated lacustrine sedimentary sequences, including Model 1 (simple stratigraphic system of thick silty-clay and sand layer) and Model 2 (stratigraphic systems of thin silty-clay and sand alternating layers) were carried out at the different peak ground accelerations (PGA) in order to simulate the earthquake-triggered SSDSs on the basis of field investigation in Tashkorgan of western China. The results showed that there were no SSDSs formed at the PGA 0.125g, and the excess pore-water pressure ratio (gamma(mu)) measured in the sand layer was lower than 0.1; sand volcanos, pipes and sand veins were formed at the PGA 0.25g, and the gamma(mu) value of the sand layer reached about 0.2 with the maximum liquefied depths of nearly 30 cm, indicating that weak liquefaction occurred in the sand layer; sand volcanos, pipes, sand veins, diapirs, load and flame structures, ball-and-pillow structures, silty-clay deformation structures were formed at the PGA 0.5g and 0.8g, and the gamma(mu) value of sand layer reached about 0.91 and 0.94 with the maximum liquefied depths of nearly 60 cm and 100 cm, respectively. The gamma(mu) value of silty-clay layers measured in all the tests was lower than 0.1, indicating that little liquefaction but thixotropy happened in the silty-clay layers. The tests showed that liquefied SSDSs could form at the PGA 0.25g, while thixotropic and gravity-driven SSDSs could form until the PGA reached 0.5g. This study also provided insights for single or closely spaced shaking events being responsible of superposed deformed beds. The simulated SSDSs have striking resemblance to that of ones identified in the field, supporting the earthquake triggering of SSDSs in the Tashkorgan area. (c) 2024 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
关键词 ：
Liquefaction Liquefaction Pore-water pressure Pore-water pressure Shaking table Shaking table Earthquake simulation experiment Earthquake simulation experiment Thixotropy Thixotropy Soft sediment deformation structure Soft sediment deformation structure
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| GB/T 7714 | Liang, Lianji , Lu, Zhihao , Zhang, Qitao et al. Shaking table simulation of soft sediment deformation structures in lacustrine sediments [J]. | SEDIMENTARY GEOLOGY , 2024 , 472 . |
| MLA | Liang, Lianji et al. "Shaking table simulation of soft sediment deformation structures in lacustrine sediments" . | SEDIMENTARY GEOLOGY 472 (2024) . |
| APA | Liang, Lianji , Lu, Zhihao , Zhang, Qitao , Tian, Hongshui , Dai, Fuchu , Jiang, Hanchao et al. Shaking table simulation of soft sediment deformation structures in lacustrine sediments . | SEDIMENTARY GEOLOGY , 2024 , 472 . |
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摘要 ：
本发明公开了一种可维持恒荷载的三轴试验装置，包括平台架、压力室、导向装置和加压装置。平台架包括平台架台面、柱腿、撑杆和脚杯。压力室上盘打孔置入水下荷重传感器；压力室下盘开有三个连接孔。导向装置采用上下压杆和两根导向杆构成，导向装置与平台架利用直线轴承连接，与加压装置利用铰接的关节轴承连接保证了压力的竖向传导。加压装置包括底部砝码和砝码拉杆构成。除压力室有机玻璃腔体外其他均使用不锈钢材料制作。本装置适用于恒荷载下土体破坏过程的模拟试验，维持土体破坏瞬间竖向压力的稳定，连接的高频率水压传感器对试样破坏瞬间的孔隙水压力变化及时捕捉，同时试样装置结构稳定，结构简单，满足试验安全和便携拆装的要求。
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| GB/T 7714 | 乔行 , 戴福初 . 一种可维持恒荷载的三轴试验装置 : CN202210472361.0[P]. | 2022-04-29 . |
| MLA | 乔行 et al. "一种可维持恒荷载的三轴试验装置" : CN202210472361.0. | 2022-04-29 . |
| APA | 乔行 , 戴福初 . 一种可维持恒荷载的三轴试验装置 : CN202210472361.0. | 2022-04-29 . |
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摘要 ：
一种双向耦合的流动性滑坡涌浪运动计算方法，属于土木水利工程领域。本计算方法在考虑滑坡/涌浪重力、静止土/水压力、摩阻力共同作用的基础上，同时考虑了滑坡涌浪之间强烈耦合作用力，根据物质的连续性原理、牛顿第二定律以及单元体的受力推导得出流动性滑坡涌浪运动的计算方程。本发明适用于水库流动性滑坡涌浪运动的计算，能够计算滑坡涌浪强烈耦合作用下的滑坡运动过程以及产生的涌浪的运动过程。
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| GB/T 7714 | 戴福初 , 岳霞 . 一种双向耦合的流动性滑坡涌浪运动计算方法 : CN202210503443.7[P]. | 2022-04-19 . |
| MLA | 戴福初 et al. "一种双向耦合的流动性滑坡涌浪运动计算方法" : CN202210503443.7. | 2022-04-19 . |
| APA | 戴福初 , 岳霞 . 一种双向耦合的流动性滑坡涌浪运动计算方法 : CN202210503443.7. | 2022-04-19 . |
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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 ：
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
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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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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
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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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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 ：
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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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 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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摘要 ：
In order to minimize the geological disaster triggered by expansive soil, and promote environmentally sustainable utilization of industrial-waste, a new composite cementing material was proposed for the expansive soil stabilization based on paper/timber industry waste. In this article, laboratory evaluation is conducted to establish the effect of curing-period for the stabilized expansive soil with newly proposed composite cementing admixture (CCA) and compared it with lignosulphonate (LS) alone, in perspective of various engineering properties, i.e., volume change behaviour, hydraulic-conductivity and strength parameters. Results showed that the curing-period has a notable impact on the performance of CCA. For the soil stabilized with CCA, swelling potential was completely eradicated after seven days of curing; whereas, the strength parameters exhibited improvement till twenty-eight day of curing with some variation in hydraulic-conductivity. Conversely, LS treated expansive soil remained prone to potential swelling after seven days of curing. Further, LS exhibited an insignificant amelioration of hydraulic-conductivity and strength parameters with the curing-period. Based on the test results, it is concluded that the CCA stabilization method is far superior than LS stabilization. Moreover, based on laboratory evaluation, twenty-eight days of time is recognized as the optimum curing-period for CCA treated soil to achieve better engineering properties. © Published under licence by IOP Publishing Ltd.
关键词 ：
Cementing (shafts) Cementing (shafts) Curing Curing Geology Geology Hydraulic conductivity Hydraulic conductivity Soil mechanics Soil mechanics Soils Soils Soil testing Soil testing Stabilization Stabilization Swelling Swelling
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| GB/T 7714 | Ijaz, Nauman , Dai, Fuchu , Rehman, Zia Ur et al. Laboratory evaluation of curing period for stabilized expansive soil by a new paper/timber industry waste based cementing material [C] . 2020 . |
| MLA | Ijaz, Nauman et al. "Laboratory evaluation of curing period for stabilized expansive soil by a new paper/timber industry waste based cementing material" . (2020) . |
| APA | Ijaz, Nauman , Dai, Fuchu , Rehman, Zia Ur , Ijaz, Zain , Zahid, Muhammad . Laboratory evaluation of curing period for stabilized expansive soil by a new paper/timber industry waste based cementing material . (2020) . |
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摘要 ：
Based on remote sensing interpretation, detailed field investigation of the deposit landforms and previous research, we propose that the emplacement mechanism of the Tahman rock avalanche, a giant Holocene rock avalanche, can be divided into three distinct phases: an extension-dominated sliding phase, a lateral shear-dominated sliding phase and a compression-dominated sliding phase.
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| GB/T 7714 | Zhu, Yuxuan , Dai, Fuchu , Yao, Xin . Preliminary understanding of the emplacement mechanism for the Tahman rock avalanche based on deposit landforms [J]. | QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY , 2020 , 53 (3) : 460-465 . |
| MLA | Zhu, Yuxuan et al. "Preliminary understanding of the emplacement mechanism for the Tahman rock avalanche based on deposit landforms" . | QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY 53 . 3 (2020) : 460-465 . |
| APA | Zhu, Yuxuan , Dai, Fuchu , Yao, Xin . Preliminary understanding of the emplacement mechanism for the Tahman rock avalanche based on deposit landforms . | QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY , 2020 , 53 (3) , 460-465 . |
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