Landslide distribution and sliding mode control along the Anninghe fault zone at the eastern edge of the Tibetan Plateau

Zhou, Hongfu; Liu, Bin; Ye, Fei; Fu, Wei; Tang, Wenqing; Qin, Yue; Fang, Tian

doi:10.1007/s11629-020-6573-6

Cited by 13 publications

(4 citation statements)

References 29 publications

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“…The main reason for the formation of the platform section is that under the action of small confining pressure (2.1 MPa), the load-bearing particles in the sandy soil sample change from the initial mutual extrusion and rolling to the particle breakage and particle reorientation, which is also the main reason for the specimen deformation from shear shrinkage to shear dilatation. This conclusion is consistent with the point of reference (Zhou et al, 2021). When the confining pressure is large (5.8 and 11.5 MPa), the plateau section in the stress-strain curve is no longer obvious, indicating that a large number of particles are broken in the initial stage and distributed throughout the test process, which can be verified by the fact that the slope of volume strain in Figure 7 remains basically constant.…”

Section: Drained Shear Testsupporting

confidence: 90%

“…In mountainous areas, under the action of high ground stress, water flow and temperature, sandy soil will be disturbed by the construction of gravity dams, deep-buried tunnels and other large-scale projects, which will generate pore water pressure in the sandy soil, and cause particles to roll or even break (Bai et al, 2014;Wang et al, 2021). This process intensifies the occurrence of natural disasters such as debris flow and landslide, and seriously affects the environmental change and sustainable development in mountainous areas (Bai et al, 2018;Zhou et al, 2021). Through the triaxial drained and undrained shear tests of sandy soil under high confining pressure and temperature, researchers found that the higher the confining pressure, the more obvious the strain softening trend of sandy soil samples.…”

Section: Introductionmentioning

confidence: 99%

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A Granular Thermodynamic Model to Describe the Temperature/Mechanical Characteristics of Sandy Soil

Zhou¹,

Siyuan²,

Wang³

2021

Front. Earth Sci.

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Based on the granular-solid-hydrodynamic theory, the constitutive model considering the thermo-hydro-mechanical (THM) coupled action is established, and the dilatancy property of sandy soil under coupled high mechanical pressure and temperature is simulated. The relationship between the energy dissipation and the macroscopic stress-strain changes at the grain level of saturated sandy soil is connected by defining the transfer coefficient and the energy function, without considering the concepts of yield surface and hardening parameters in classical plastic mechanics. Additionally, the changes in temperature, relative density and confining pressure during the shearing process cause particle rolling, slipping and friction. The energy dissipation in this process is described by defining the concept of particle entropy and particle temperature. In the calculation, the isotropic compression test, drained and undrained shear test of sandy soil under high stress are simulated respectively. The validity of the model is proved by comparing with the test results. Meanwhile, the stress-strain relationship and pore pressure variation law of sandy soil under different temperatures are predicted. The results show that the effect of temperature on shear strength is limited, and the pore pressure will gradually increase and become stable with the increase of temperature. Thus, this work establishes the soil THM coupled model from the perspective of micro energy dissipation, which can provide new theoretical support for the prediction of natural disasters such as landslides and debris flow.

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Section: Drained Shear Testsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

A Granular Thermodynamic Model to Describe the Temperature/Mechanical Characteristics of Sandy Soil

Zhou¹,

Siyuan²,

Wang³

2021

Front. Earth Sci.

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“…Macroscopically, topography is shaped by the endogenic process and exogenic process, especially the action of neotectonic movement Zhou et al 2021). The topographic features are mainly reflected in the landform, elevation, relative relief and slope gradient .…”

Section: Topographical Factormentioning

confidence: 99%

Distribution feature and development characteristics of geohazards in Wudu district, Gansu province, Northwest China

Zhang

Sun

et al. 2022

Geoenviron Disasters

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Background The study area located at southeast Gansu, China, has long been afflicted by the intense occurrence of geohazards. The study area is characterized by interleaving terrain of precipitous mountains and valley basins, abundant precipitation, and complicated geological setting. In this work, 1144 geohazards including 759 landslides, 281 debris flows, and 104 collapse were presented and their types were categorized in detail. Then, the distribution of geohazards were analyzed and the controlling role of hazard-inducing environment and triggering factors on geohazards were preliminary presented. Results In this work, correlation analysis between geohazards and geological, topographical, and geomorphological context was conducted. Concave slopes with height smaller than 200 m and slope gradient between 21° and 40° is the favorable topographic feature for landslide occurrence and the predominant slope aspects of landslides are southwest, south, west, and southeast. Collapse generally occurs in slope with gradient larger than 45°. Valleys with valley gradient less than 400‰, valley height between 100 and 500 m, and watershed area of 1–10 km2 register the largest percentage and the most favorable slope gradient for the supply of solid source at the debris flow source area is 25°–45°. The preferable strata for geohazards (landslide, collapse and debris flow) are Middle and upper Pleistocene loess, Holocene diluvium, Silurian phyllite and slate, Neogene mudstone, and Devonian schist and gneiss, and most geohazards occurred in tectonic erosional middle altitude mountain, tectonic erosional high-middle altitude mountain, tectonic erosional-diluvial planation surface. In addition, the controlling role of triggering factors, i.e., precipitation, earthquake, and human engineering activity was discussed and described in this work. Conclusion Geohazards in the study area are synthetically controlled by the hazard-inducing environment and triggering factors. The complicated sliding-prone strata and steep topography resulted from strong tectonic movement provides a favorable basis for the development and formation of geohazards. Heavy rainfall, strong seismic motion, and human engineering activity are the main triggering factors for geohazard occurrence.

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“…There are three causes of landslides, taking the southern Qinghai-Tibet Plateau as an example. (1) Tectonic effect: Faults can destroy the structure and integrity of the slope rock mass, reduce its mechanical strength, and control the slope failure mode [10]. Thrust faults can have a hanging wall effect and are frequently associated with the development of numerous landslides [11].…”

Section: Introductionmentioning

confidence: 99%

Landslide Mapping and Causes of Landslides in the China–Nepal Transportation Corridor Based on Remote Sensing Technology

Zhao,

Zeng,

Zhang

et al. 2024

Remote Sensing

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The China–Nepal Transportation Corridor is vital to the country’s efforts to build a land trade route in South Asia and promote the Ring-Himalayan Economic Cooperation Belt. Due to the complex geological structure and topographical environment of the Qinghai–Tibet Plateau, coupled with the impact of climate change, the frequent occurrence of geological disasters has increased the operational difficulty of the China–Nepal Highway and the construction difficulty of the China–Nepal Railway. However, to date, there has been no systematic study of the spatial distribution of landslides along the entire route within the area, the factors influencing landslides at different scales, or the causes of landslides under different topographic backgrounds. There is an even greater lack of research on areas threatened by potential landslides. This study comprehensively applies remote sensing, mathematical statistics, and machine learning methods to map landslides along the China–Nepal transportation corridor, explore the influencing factors and causes of different types of landslides, and investigate the distribution characteristics of potential landslides. A total of 609 historic landslides have been interpreted in the study area and were found to be distributed along faults and locally concentrated. The strata from which landslides develop are relatively weak and are mainly distributed within 2 km of a fault with a slope between 20° and 30°. The direction of slope for the majority of landslides is south to south-west, and their elevation is between 4000 and 5000 m. In addition, we discovered a power law relationship between landslide area and volume (VL = 2.722 × AL1.134) and determined that there were 47 super-large landslides, 213 large landslides, and 349 small and medium-sized landslides in the area, respectively. Slope is the most significant influencing factor for the development of landslides in the area. Apart from slope, faults and strata significantly influence the development of large and medium-small landslides, respectively. We have identified 223 potential landslides in the region, 15 of which directly threaten major transport routes, mainly in the Renbu Gorge section of the China–Nepal Highway and the proposed China–Nepal Railway section from Peikucuo to Gyirong County. In addition, we also discussed the causes of landslides within three geomorphic units in the region. First, the combined effects of faulting, elevation, and relatively weak strata contribute to the development of super-large and large landslides in the Gyirong basin and gorge. Second, the relatively weak strata and the cumulative damaging effects of earthquakes promote the development of small and medium-sized landslides in the Xainza-Dinggye rift basin. Third, under the combined effect of the hanging wall effect of thrust faults and the relatively weak material composition, landslides of various types have developed in the Nagarzê mountain. It is worth noting that potential landslides have developed in all three geomorphic units mentioned above. This study provides data and theory to assist in the accurate mitigation and control of landslide hazards in the corridor.

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Landslide distribution and sliding mode control along the Anninghe fault zone at the eastern edge of the Tibetan Plateau

Cited by 13 publications

References 29 publications

A Granular Thermodynamic Model to Describe the Temperature/Mechanical Characteristics of Sandy Soil

A Granular Thermodynamic Model to Describe the Temperature/Mechanical Characteristics of Sandy Soil

Distribution feature and development characteristics of geohazards in Wudu district, Gansu province, Northwest China

Landslide Mapping and Causes of Landslides in the China–Nepal Transportation Corridor Based on Remote Sensing Technology

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