Scientific research images and site photos of natural disaster risk in the scientific research area around the Himalayas (domestic part) (2021)

The photos include daily (2021.7.25-2021.8.6) scientific research disaster points and working photos, as well as the questionnaire of each disaster point (including landslide, collapse, debris flow, etc.), identify the disaster points recorded every day on the map, convert them into KMZ format, and analyze the distribution of disaster points in the scientific research area on GIS. The distribution of disaster points shows that there are fewer disaster points along the north line and in the scientific research county, while there are more disaster points along the south line and in the scientific research county. During the scientific research, wind sand points and mountain erosion points were found and recorded. Especially in the valleys and gullies around the Himalayas, disasters such as landslide and debris flow are easy to occur, while geological disasters are not easy to occur in the Qiangtang plateau area (plateau surface). The photos of disaster points can reflect the disaster characteristics of a region. They are intuitive data for studying local disaster types, and then have basic significance for local disaster types, distribution and disaster prevention and reduction measures.

0 2022-05-06

Disturbance disaster data of 1:250000 major projects in Qinghai Tibet Plateau (1985-2020)

This data is the disturbance disaster data of 1:250000 major projects in the Qinghai Tibet Plateau. For the scope of disaster interpretation, line engineering (national highway, high-speed, railway and Power Grid Engineering) and hydropower engineering are bounded by the first watershed on both sides of the project; Mine, oilfield and port projects are bounded by 1km away from the project. Engineering disturbance disasters can be divided into two categories: ① landslide, collapse and debris flow disasters induced by engineering construction; ② For natural disasters that may affect the project, it is stipulated that all natural disasters within the above interpretation scope belong to category ② engineering disturbance disasters. The data includes the location, length, width, height difference, distribution elevation, genetic type, inducing factors, occurrence time, lithology and other elements of landslide, disaster related projects and project construction years. Based on Google Earth image and 1:500000 geological diagram, 6176 disaster points were interpreted; Google Earth is mainly used for disturbance disaster interpretation, and combined with field investigation to verify the interpretation results, ArcGIS is used to generate disaster distribution map; The data comes from Google Earth high-resolution images, with high accuracy of original data. In the process of generating disaster files, the interpretation specifications are strictly followed, and special personnel are assigned to review, so the data quality is reliable; Based on the collected data, the disaster risk analysis of the study area can be carried out to provide theoretical guidance for the smooth operation of the built projects and the construction of the line projects not built / under construction.

0 2022-04-18

Test data on consolidation characteristics and bearing capacity of debris flow buried sediments in earthquake areas of China (2019-2021)

Based on a large number of field investigations and laboratory tests, according to the physical parameters of different debris flow deposits on site, the viscosity range of debris flow slurry and the solid particle gradation of debris flow are determined. Through the test, the water and soil ratio of slurry in different viscosity range is determined, and debris flow slurry with different viscosity is configured according to the water and soil ratio. Through the screening test, the solid particle gradation of debris flow is determined. Considering the different combinations of three factors of debris flow slurry viscosity, solid ratio and particle gradation, the debris flow siltation bodies in different states are manually configured, and the bearing capacity test of debris flow siltation bodies is carried out to study the consolidation characteristics and temporal and spatial variation characteristics of bearing capacity of debris flow siltation bodies with different viscosity, solid ratio and particle gradation.

0 2022-03-25

SR Nd isotopic test data of granite in eastern Tibet

We have studied the Petrotectonic attributes of granites distributed in a large area in the North Lancangjiang structure in Bitu area. The major and trace elements and Sr Nd isotopes have been completed in the Key Laboratory of deposit geochemistry, Institute of geochemistry, Chinese Academy of Sciences. Among them, the main elements are analyzed by pw4400 X-ray fluorescence instrument, and the contents of 10 element oxides are determined; Trace elements are tested by ICP-MS inductively coupled plasma mass spectrometer. ICP-MS is manufactured by Agilent company in Tokyo, Japan, and the model is Agilent 7700x. The analysis method is the same as that of Zhang Xin, etc. According to the analysis results of standard sample gbpc-1de, the analysis error is less than 5%. MC-ICP-MS double focusing magnetic mass spectrometer with Neptune plus model is used for isotope test experiment. The test basis is GB / T 17672-1999.

0 2022-03-23

Load test data of Jinsha River in 2020

This sub topic obtains the physical and mechanical indexes of bedrock of typical major landslides (zanong landslide, zongrongcun landslide and xiaguiwa landslide) in Jinsha River Basin of Qinghai Tibet Plateau. The physical and mechanical indexes of bedrock are mainly obtained through point load test. The obtained physical and mechanical indexes provide a scientific basis for subsequent physical model test and revealing the internal and external dynamic coupling mechanism. The strength test of typical landslide rock block adopts point load instrument, with no less than 15 specimens in each group, a total of 5 groups. There are five kinds of rock samples for point load test, namely limestone, ophiolite, mica gneiss, diorite and schist. Among them, diorite is loaded in cylindrical radial direction, and the rest are irregular rock samples. The size of the experimental results is corrected, and the experimental state is natural water content.

0 2022-03-21

Large scale direct shear test data of sliding zone soil of typical landslide in Jinshajiang River (2020)

This sub topic obtains the physical and mechanical indexes of sliding zone soil and bedrock of typical major landslides (zanong landslide, zongrongcun landslide and xiaguiwa landslide) in Jinsha River Basin of Qinghai Tibet Plateau. The physical and mechanical indexes of sliding zone soil are mainly obtained by large-scale direct shear test. The obtained physical and mechanical indexes provide a scientific basis for subsequent physical model tests and revealing the internal and external dynamic coupling mechanism. The shear strength test of sliding zone soil adopts large-scale direct shear instrument, and there are three groups considering different moisture content. In the large-scale direct shear test, the remolded sliding zone soil specimens with different moisture content are made for three typical landslides respectively, and the shear strength normal pressure relationship curve of sliding zone soil with different moisture content is obtained, and then the shear strength index of sliding zone soil with different moisture content is obtained.

0 2022-03-21

Shaking table model test data for counter-bedding rock slope - model and sensor layout diagram (2019-2021)

(1) Data content: This data set is based on the Xuelongnang landslide in the Sanjiang basin of the Qinghai-Tibet Plateau, and reconstructs the counter-bedding slope before the slide; the counter-bedding slope before the slide is used as a reference for the shaking table model test, which is used to design the shaking table model test model and the sensor layout diagram for the counter-bedding rock slope, and a special joint is set in the model slope, and the deployed sensors are the acceleration sensors and the velocity sensors. (2) Data source and processing method: The data set is drawn by Guo Mingzhu of Beijing University of Technology using CAD software. (3) The data provide reference for the subsequent shaking table model test implementation.

0 2022-03-21

Shaking table model test data for bedding rock slope - model and sensor layout diagram

(1) Data content: This data set is based on the Xiaguiwa landslide in the Sanjiang basin of the Qinghai-Tibet Plateau, reconstructing the bedding slope of the Xiaguiwa landslide; the bedding slope of the Xiaguiwa landslide is used as a reference for shaking table model tests, which is used to design the shaking table model test model and sensor layout diagram for the bedding rock slope, with a weak rock layer in the model slope, and the sensors deployed are acceleration sensors and velocity sensors, and the measured (2) Data source and processing method: The data set is drawn by Guo Mingzhu of Beijing University of Technology using CAD software. (3) The data provide reference for the subsequent shaking table model test implementation.

0 2022-03-20

Digital surface elevation model of Yarlung Zangbo River burst flood deposition: Manqu-Yangzhuoyongcuo (2021)

The process of reconstructing the river blocking disaster chain in Yajiang river basin is of great significance to deeply understand the natural attributes and evolution law of ice river lake water landscape system in natural state. This data is the digital surface elevation model obtained in the process of scientific research. The data source is UAV tilt photography, which is corrected by real-time differential GPS (RTK) control points; The vertical resolution is 5cm and the horizontal resolution is 20cm. This data can be used to assist in identifying the spatial distribution of break flood sediments (break flood hills, gravel hills, Boulder core beach, etc.) in typical manqu river reach and the position of weir plug dam body, so as to obtain the section elevation. It is the first-hand data for restoring the scale of break flood.

0 2022-03-18

Test data of debris flow abrasion of concrete materials for drainage channel in strong earthquake areas in China (2019-2022)

The abrasion characteristics of debris flow are the key parameters for the durability design of prevention and control engineering. In this project, 44 working conditions of 5 kinds of gravel gradation, 4 solid ratios, 3 kinds of slurry viscosity of debris flow, 2 kinds of debris flow velocity and 2 kinds of concrete strength are selected. The debris flow abrasion test is carried out with the self-developed debris flow abrasion test device to examine the concrete loss rate Changes of abrasion rate and surface morphology. The experimental results show that the loss rate and abrasion rate of concrete increase with the grading number of gravel (the content of large particle gravel increases), the solid ratio of debris flow and the viscosity of debris flow. According to the developed debris flow abrasion test device, the debris flow abrasion test of concrete materials is carried out, the debris flow abrasion test results are obtained, and the debris flow abrasion coefficients of different concrete materials are obtained

0 2022-03-16