Lightweight soil landslide geological disaster prevention and control methods

Abstract

The invention discloses a method for preventing and controlling geological disasters of lightweight soil landslide, which belongs to the technical field of geological disaster prevention and control. The key points of the technical scheme are as follows: slope cutting, pipe laying, grouting, solidification, barrier setting, backfilling lightweight soil, cloth laying and pile laying. Compared with traditional prevention and control methods, the method for preventing and controlling geological disasters of lightweight soil landslide has better anti-landslide effect and lower implementation difficulty.

Description

Technical Field

[0001] The invention relates to the technical field of geological disaster prevention and control, in particular to a method for preventing and controlling geological disasters of lightweight soil landslide. Background Art

[0002] Landslide refers to the action and phenomenon that a part of the rock and soil on the slope of a mountain moves as a whole downward along a certain weak structural surface (belt) due to shear displacement under the action of gravity (including the gravity of the rock and soil itself and the dynamic and static pressure of groundwater). Commonly known as "mountain sliding", "mountain collapse", "ground slide", "soil slide", etc., it is one of the common geological disasters. In order to prevent and control landslides, common measures include the use of anti-slide piles or anchor frames to reinforce the soil on the slope or slow down the speed of the landslide. However, this anti-slide pile or anchor device is not very effective for landslide bodies with large landslide thrust and large sliding surface depth. Moreover, this anti-slide pile or anchor device needs to be excavated underground on the landslide body to the sliding bed bearing layer to construct a supporting structure, which is difficult to construct and has high construction costs. Therefore, a landslide geological disaster prevention and control method with better anti-landslide effect and easier implementation is needed today. Summary of the invention

[0003] In view of the problems existing in the prior art, the purpose of the present invention is to provide a method for preventing and controlling geological disasters of lightweight soil landslides, which has better anti-landslide effect and lower implementation difficulty than traditional prevention and control methods.

[0004] The above technical purpose of the present invention is achieved through the following technical scheme: a method for preventing and controlling geological disasters of lightweight soil landslide, comprising the following steps:

[0005] S1, cutting away the easily sliding soil on the landslide surface to expose the base soil layer, and then cutting the slope of the base soil layer into multiple steps;

[0006] S2, preparing a plurality of hoses with one end open and the other end closed, placing the open end of the hose at the top of the slope and the closed end at the foot of the slope, and laying each hose on the stepped slope of the base soil layer;

[0007] S3, injecting the prepared cement into each hose, and after each hose is filled with cement, sealing the open end of each hose;

[0008] S4, waiting for the cement in each hose to completely solidify;

[0009] S5. Backfill lightweight soil on the stepped slope of the base soil layer until the slope is restored to its state before the slope is cut;

[0010] S6. Lay a covering cloth on the slope that can cover the entire slope;

[0011] S7. The covering cloth is nailed to the slope surface through multiple piles, and each pile is ensured to be inserted into the lightweight soil and fixedly connected to the hose filled with cement and solidified.

[0012] In some embodiments, the longitudinal surface of the step on the slope of the base soil layer is inclined toward the top of the slope, and the angle between the longitudinal surface and the transverse surface of the step on the slope of the base soil layer is an obtuse angle.

[0013] In some embodiments, after the hose is filled with cement and the open end is sealed, longitudinal pits are dug at the top and the foot of the slope, and the two ends of the hose are buried in the two longitudinal pits respectively.

[0014] In some embodiments, before backfilling the lightweight soil, a fence is first set up at the foot of the slope, and the length direction of the fence is perpendicular to the inclination direction of the slope.

[0015] In some embodiments, one end of the covering cloth at the foot of the slope is fixedly connected to the enclosure.

[0016] In some embodiments, the covering cloth has excess length at one end of the slope foot, and the excess part is folded between the enclosure and the lightweight soil.

[0017] In some embodiments, after laying the cover cloth, the laying path of the hose is marked on the surface of the cover cloth, and stakes are set along the marked path.

[0018] In summary, the present invention has the following beneficial effects:

[0019] 1. This method for preventing and controlling geological disasters of landslides of lightweight soil comprises the following steps: arranging a plurality of hoses filled with cement on the stepped base soil layer slope as the bottom support skeleton of the lightweight soil; after backfilling the lightweight soil, laying a covering cloth on the surface of the lightweight soil, and fixing the covering cloth on the lightweight soil through piles; at the same time, the piles are inserted into the lightweight soil and fixedly connected with the internally solidified hoses; each pile body is inserted into the lightweight soil from shallow to deep and connected with the bottom support skeleton of the lightweight soil; on the one hand, it plays the role of fixing the covering cloth; on the other hand, the pile body and the internally solidified hoses jointly form a three-dimensional frame; and the pile bodies and the hoses are crisscrossed, and cooperate with the covering effect of the covering cloth to form a plurality of open three-dimensional spaces, so that the lightweight soil can be placed more dispersedly, and it is not easy to form a large mass of soil; in addition, the stepped base soil layer slope can also divide the lightweight soil into multiple levels for placement, so that the lightweight soil is not easy to slide.

[0020] 2. In this method for preventing and controlling geological disasters of landslides of lightweight soil, the hose filled with cement is supported by various steps on the slope of the base soil layer during the solidification period. Only the edges of the steps support the hose during the solidification process, so that the suspended hose between adjacent steps will naturally sag during the solidification process, so that after the cement in the hose is completely solidified, the entire hose will be wavy. Under the joint action of multiple wavy hoses, coupled with the stepped slope of the base soil layer, the sliding resistance of the lightweight soil is greatly increased, thereby effectively improving the anti-landslide effect.

[0021] 3. The method for preventing and controlling geological disasters of landslides of lightweight soil is very simple in laying the hose as the supporting skeleton at the bottom of the lightweight soil. There is no need to set it step by step along the stepped base soil layer slope, nor is there any need to set any fixing mechanism. It is only necessary to naturally place the hose from the top of the slope to the foot of the slope, pour cement from the top of the slope, and then seal the hose and wait for solidification. The solidification process only relies on the natural drooping of the hose to shape the hose, and there is no need to deliberately set the shape. The wavy hose after solidification can be stuck and fixed by the edges of the steps at each level. There is no need to deliberately reinforce the hose. With the hose as a guide, the pile body only needs to be arranged along the hose. On the one hand, the pile body serves as the internal skeleton of the lightweight soil, reinforces the lightweight soil layer, and increases the resistance to sliding of the lightweight soil. On the other hand, it also serves to fix the covering cloth. That is to say, while the covering cloth is fixed by the pile body, the lightweight soil skeleton can be constructed simultaneously. The whole process is simple and fast, and has the advantages of low construction difficulty and fast construction speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic cross-sectional view of a landslide area after slope cutting according to the present invention;

[0023] Figure 2 It is a schematic cross-sectional view of a landslide area after pipe laying, grouting, solidification and barrier setting according to the present invention;

[0024] Figure 3 It is a schematic cross-sectional view of a landslide area after backfilling with lightweight soil according to the present invention;

[0025] Figure 4 It is a schematic cross-sectional view of a landslide area after the cloth and piles are laid according to the present invention;

[0026] Figure 5 It is a three-dimensional schematic diagram of a landslide area after the cloth and piles are laid according to the present invention;

[0027] Figure 6 It is a flowchart of the present invention.

[0028] In the figure: 1. base soil layer; 2. hose; 3. enclosure; 4. lightweight soil; 5. covering cloth; 6. pile body. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] A method for preventing and controlling geological disasters of lightweight soil landslides comprises the following steps:

[0034] S1, such as Figure 1 As shown, the slippery soil on the landslide surface is cut off to expose the base soil layer 1, and then the slope of the base soil layer 1 is cut into multiple steps. The longitudinal surface of the steps on the slope of the base soil layer 1 can be set to be inclined toward the top of the slope, that is, the angle between the longitudinal surface and the transverse surface of the steps on the slope of the base soil layer 1 is an obtuse angle. This setting can make it difficult for the soil to slide down when backfilling the soil on the stepped slope of the base soil layer 1 later, which is conducive to improving the stability of the slope.

[0035] S2, such as Figure 2As shown, a plurality of hoses 2 with one end open and the other end closed are prepared, the open end of the hose 2 is arranged at the top of the slope, and the closed end is arranged at the foot of the slope, and each hose 2 is laid on the stepped slope of the base soil layer 1 in this way, each hose 2 is naturally placed along the slope, without bending or tensioning, and each hose 2 is preferably arranged equidistantly and evenly and parallel to each other, so as to achieve uniform distribution of the plurality of hoses 2 on the stepped slope of the base soil layer 1. In addition, when placing the hose 2, the hose 2 can be wound around the outside of the cylindrical structure in advance, and then only the open end of the hose 2 is fixed from the top of the slope and the cylindrical structure is allowed to roll down to the foot of the slope with the hose 2, and finally the position of the hose 2 can be adjusted at the foot of the slope, so that the plurality of hoses 2 can be arranged quickly, time-saving and labor-saving;

[0036] S3, after all the hoses 2 are arranged, the pre-mixed cement is injected into each hose 2, and after each hose 2 is filled with cement, the open end of each hose 2 is sealed, and the sealing method can be conventional means, which can be selected by those skilled in the art as needed. Figure 2 As shown, after the hose 2 is filled with cement and the open end is closed, longitudinal pits can be dug at the top and the foot of the slope, and the two ends of the hose 2 are buried in the two longitudinal pits respectively to fix the ends of the hose 2;

[0037] S4, wait for the cement in each hose 2 to completely solidify. Figure 2 As shown, the suspended hose 2 between adjacent steps naturally droops during the solidification process, so that after the cement in the hose 2 is completely solidified, the entire hose 2 is wavy. The hose 2 can be formed by the natural drooping of the hose 2 during the solidification process, without deliberately setting the shape, and the wavy hose 2 after solidification can be clamped and fixed by the edges of each step, and there is no need to deliberately reinforce the hose 2.

[0038] S5. First, preparatory work is performed before backfilling the lightweight soil 4. A fence 3 can be set up at the foot of the slope, and the length direction of the fence 3 is perpendicular to the inclination direction of the slope surface to prevent the lightweight soil 4 from sliding down. The fence 3 can be built with ordinary bricks, and the lightweight soil 3 can be backfilled only after it solidifies. After the above preparatory work is completed, the lightweight soil 4 is backfilled on the stepped slope of the base soil layer 1 until the slope surface is restored to the state before the slope is cut. The lightweight soil 4 may include the following components in parts by weight: 30-50 parts of raw soil, 15-25 parts of cement, 30-45 parts of fly ash, 10-15 parts of polymer microspheres, 5-8 parts of latex powder, and 10-18 parts of heavy calcium powder. The raw soil can be the soil cut in step S1.

[0039] S6. A covering cloth 5 that can cover the entire slope is laid on the slope. The covering cloth 5 can increase the sliding resistance of the lightweight soil 4 and reduce dust. The covering cloth 5 can be made of geotextile. One end of the covering cloth 5 located at the foot of the slope can be fixedly connected to the enclosure 3 to fix the covering cloth 5 and improve the fit between the covering cloth 5 and the lightweight soil 4. Preferably, Figure 4 and Figure 5 As shown, the covering cloth 5 at one end of the slope foot can have a surplus length, and the surplus part is folded between the enclosure 3 and the lightweight soil 4. When a landslide occurs, the sliding soil will spread at the slope foot. Therefore, the covering cloth 5 with a surplus length at the slope foot can accommodate and cover more soil, so as to be able to well cope with the spread of the soil after sliding. Even if the soil slides and spreads, the covering cloth 5 can still cover the spread soil, thereby increasing the sliding resistance and preventing dust, and can effectively inhibit the further spread of the sliding soil.

[0040] S7. After laying the covering cloth 5, the laying path of the hose 2 can be marked on the surface of the covering cloth 5, and the pile body 6 can be set along the marked path. When marking the path of the hose 2, lime can be sprinkled along the path. The lime sprinkling line is the laying path of the hose 2. When sprinkling the lime, an unmanned aerial vehicle can be used for auxiliary observation to prevent the path from being skewed. After completing the above steps, the covering cloth 5 can be nailed to the slope surface through multiple pile bodies 6, and it is ensured that each pile body 6 is inserted into the lightweight soil 4 and fixedly connected to the hose 2 filled with cement and solidified. The pile body 6 can use an expansion anchor rod, which can be drilled into the solidified cement block in one direction and cannot be pulled out. Of course, in order to facilitate installation, holes can also be drilled in the solidified hose 2 in advance, and each hole position is marked. When setting the pile body 6, the pre-drilled hole position is drilled according to these marks to achieve the anchoring of the pile body 6 and the solidified cement in the hose 2.

[0041] The method for preventing and controlling geological disasters of landslide of lightweight soil comprises the following steps: a plurality of hoses 2 filled with cement are arranged on the slope of the stepped base soil layer 1 as the bottom support skeleton of the lightweight soil 4; after the lightweight soil 4 is backfilled, a covering cloth 5 is laid on the surface of the lightweight soil 4, and the covering cloth 5 is fixed on the lightweight soil 4 through a pile body 6; at the same time, the pile body 6 is also inserted into the lightweight soil 4 and fixedly connected with the hose 2 which has been solidified inside; each pile body 6 is inserted into the lightweight soil 4 from shallow to deep and connected with the bottom support skeleton of the lightweight soil 4, which plays the role of fixing the covering cloth 5 on the one hand, and on the other hand, the pile body 6 and the hose 2 which has been solidified inside jointly form a three-dimensional frame; and each pile body 6 and each hose 2 are crisscrossed, and cooperate with the covering effect of the covering cloth 5 to form a plurality of open three-dimensional spaces, so that the lightweight soil 4 can be placed more dispersedly and is not easy to form a large mass of soil; in addition, the stepped slope of the base soil layer 1 can also divide the lightweight soil 4 into multiple levels for placement, so that the lightweight soil 4 is not easy to slide.

[0042] In this method for preventing and controlling geological disasters of lightweight soil landslides, the hose 2 filled with cement is supported by various steps on the slope of the base soil layer 1 during the solidification period. During the solidification process, only the edges of the steps support the hose 2, so that the suspended hose 2 between adjacent steps will naturally sag during the solidification process, so that after the cement in the hose 2 is completely solidified, the entire hose 2 will be wavy. Under the joint action of multiple wavy hoses 2, coupled with the stepped slope of the base soil layer 1, the sliding resistance of the lightweight soil 4 is greatly increased, thereby effectively improving the anti-landslide effect.

[0043] In addition, the laying method of the hose 2 as the bottom support skeleton of the lightweight soil 4 in this lightweight soil landslide geological disaster prevention method is very simple. There is no need to set it step by step along the stepped base soil layer 1 slope, nor is there any need to set up any fixing mechanism. It is only necessary to naturally lay the pipe from the top of the slope to the foot of the slope, pour cement from the top of the slope, and then seal the pipe and wait for solidification. The solidification process only relies on the natural drooping of the hose 2 to shape the hose 2, and there is no need to deliberately set the shape. The wavy hose 2 after solidification can be stuck and fixed by the edges of the steps at each level. There is no need to deliberately reinforce the hose 2. With the hose 2 as a guide, when setting the pile body 6, it is only necessary to arrange it along the hose 2. On the one hand, the pile body 6 serves as the internal skeleton of the lightweight soil 4, reinforces the lightweight soil 4 layer, and increases the sliding resistance of the lightweight soil 4. On the other hand, it also serves to fix the covering cloth 5. That is to say, while fixing the covering cloth 5 through the pile body 6, the lightweight soil 4 skeleton can be constructed simultaneously. The whole process is simple and fast, and has the advantages of low construction difficulty and fast construction speed.

[0044] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A method for preventing and controlling geological disasters of lightweight soil landslides, characterized in that: The steps include: S1, cutting away the easily sliding soil on the landslide surface to expose the base soil layer, and then cutting the slope of the base soil layer into multiple steps; S2, preparing a plurality of hoses with one end open and the other end closed, placing the open end of the hose at the top of the slope and the closed end at the foot of the slope, and laying each hose on the stepped slope of the base soil layer; S3, injecting the prepared cement into each hose, and after each hose is filled with cement, sealing the open end of each hose; S4, waiting for the cement in each hose to completely solidify; S5. Backfill lightweight soil on the stepped slope of the base soil layer until the slope is restored to its state before the slope is cut; S6. Lay a covering cloth on the slope that can cover the entire slope; S7. The covering cloth is nailed to the slope surface through multiple piles, and each pile is ensured to be inserted into the lightweight soil and fixedly connected to the hose filled with cement and solidified.

2. The method for preventing and controlling geological disasters of lightweight soil landslide according to claim 1 is characterized in that: The longitudinal surface of the step on the slope of the base soil layer is inclined toward the direction of the slope top, and the angle between the longitudinal surface and the transverse surface of the step on the slope of the base soil layer is an obtuse angle.

3. The method for preventing and controlling geological disasters of lightweight soil landslide according to claim 1, characterized in that: After the hose is filled with cement and the open end is sealed, longitudinal pits are dug at the top and foot of the slope, and the two ends of the hose are buried in the two longitudinal pits respectively.

4. The method for preventing and controlling geological disasters of lightweight soil landslide according to claim 1, characterized in that: Before backfilling the lightweight soil, set up a fence at the foot of the slope, and the length of the fence should be perpendicular to the inclination direction of the slope.

5. The method for preventing and controlling geological disasters of lightweight soil landslide according to claim 4 is characterized in that: One end of the covering cloth at the foot of the slope is fixedly connected to the enclosure.

6. The method for preventing and controlling geological disasters of lightweight soil landslide according to claim 5 is characterized in that: There is extra length of the covering cloth at one end of the slope foot, and the extra part is folded between the enclosure and the lightweight soil.

7. The method for preventing and controlling geological disasters of lightweight soil landslide according to claim 1 is characterized in that: After laying the cover cloth, mark the laying path of the hose on the surface of the cover cloth and set the stakes along the marked path.

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