How to identify the existence of landslides during field surveys

Answers]: a, d

In addition to the exploration line along the main slip direction, a certain number of exploration lines should be arranged on both sides of the well and outside the sliding body, and the spacing of exploration holes should not be greater than 40m.

1. In the field, observe the Danchao landslide with the naked eye, and its stability can be roughly judged.

2. The landslide has been stabilized, the back wall is high, overgrown with trees, and there are no scratches; The landslide platform is wide and leveled, and the soil is dense without subsidence; The slope of the front edge of the landslide is gentle, there is no loose collapse, and there are signs of being washed by the river on the river front. The natural gully on both sides of the landslide body mold is very deep, and there is clear spring water flowing out at the foot of the slope of the tongue.

3. The unstable landslide body has a steep overall slope and long extension on the surface, and the slope surface is uneven; There are springs, wetlands and new gullies on the surface of the landslide, and there are uneven local platforms caused by uneven subsidence. The soil and rocks at the front edge of the landslide are loose, small collapses occur from time to time, cracks appear on the slope body, and there are no huge upright trees.

4. When a landslide occurs, first of all, you should keep calm, quickly look around, and evacuate to a safer area, generally to flee to both sides as the best direction; If the landslide is sliding as a whole, you should stay still or hold on to the tree to save yourself.

1. Zhihao uses the naked eye to observe the landslide in the field, and its stability can be roughly judged.

2. The landslide has been stabilized, the back wall is high, overgrown with trees, and there are no scratches; The landslide platform is wide and leveled, and the soil is dense without subsidence; The slope of the front edge of the landslide is gentle, there is no loose collapse, and there are signs of being washed by the river on the river front. The natural gullies on both sides of the landslide are deeply cut, and there is clear spring water flowing out at the foot of the tongue.

3. The unstable landslide body has a steep overall slope and long extension on the surface, and the slope surface is uneven; There are springs, wetlands and new gullies on the surface of the landslide, and there are uneven local platforms caused by uneven subsidence. The soil and rocks at the front edge of the landslide are loose, small collapses occur from time to time, cracks appear on the slope body, and there are no huge upright trees.

4. When a landslide occurs, first of all, you should keep calm, quickly look around, and evacuate to a safer area, generally to flee to both sides as the best direction; If the landslide is sliding as a whole, you should stay still or hold on to the tree to save yourself.

1. Observe the landslide body with the naked eye in the field, and its stability can be roughly judged.

2. The landslide that has been stabilized, the back wall is chaotic and high, overgrown with trees, and it is not suitable for grinding marks; The landslide platform is wide and leveled, and the soil is dense without subsidence; The slope of the front edge of the landslide is gentle, there is no loose collapse, and there are signs of being washed by the river on the river front. The natural gullies on both sides of the landslide are deeply cut, and there is clear spring water flowing out at the foot of the tongue.

3. The unstable landslide body has a steep overall slope and long extension on the surface, and the slope surface is uneven; There are springs, wetlands and new gullies on the surface of the landslide, and there are uneven local platforms caused by uneven subsidence. The soil and rocks at the front edge of the landslide are loose, small collapses occur from time to time, cracks appear on the slope body, and there are no huge upright trees.

4. When encountering a landslide, you should first keep calm, quickly look around, and evacuate to a safer area, generally to flee to both sides as the best direction; If the landslide is sliding as a whole, you should stay still or hold on to the tree to save yourself.

Summary. Landslide field identification signs mainly include slope topography, ground seepage, weathered rocks, debris flow accumulations and other characteristic signs, which can help identify landslide areas and potential landslide hazards.

Landslide field identification of landslide is mainly characterized by slope topography, ground seepage, weathered rocks, debris flow accumulations and other characteristic signs, which can help Yin Weichun identify landslide areas and potential landslide hazards.

Excuse me, but please go into more detail?

The field identification signs of landslides mainly include the first hole surface, vegetation, rock, hydrogeology and other aspects. First, noticeable cracks and collapses appeared in the ground. The vegetation changes can also reflect the existence of landslides, and the vegetation in the landslide area may show symptoms such as dwarfing, scattered, and discoloration.

There will be cracks, chips, slip marks, etc. on the rocks. In terms of hydrogeology, there may be leaks and stagnant water spots in the landslide area. These phenomena can be used as the basis for landslide field identification markers, and effective landslide monitoring and early warning can be realized.

Answer] :d according to Article 13 of the Code for Geotechnical Investigation (GB 50021-2001) (2009 Edition).Landslide monitoring should include:

displacement of the landslide body; Position and dislocation of the sliding surface; the occurrence and development of landslide cracks; groundwater level, flow direction, spring flow rate and pore pressure in the landslide zone inside and outside the landslide; The displacement, deformation, and crack development of the collapse structure and other engineering facilities.