Novel debris flow blocking structure

Abstract

The utility model provides a novel debris flow blocking structure, which belongs to the technical field of disaster prevention and control and comprises a retaining wall body, an upper debris flow blocking device is arranged at the top of the retaining wall body and comprises a plurality of net rods, and a protective net is fixedly arranged on the net rods. When a large amount of debris flow moves at a high speed, large-particle-size broken stones and tree trunks wrapped along the way mainly move on the upper portion of the debris flow, and the debris flow upper portion blocking device in the blocking structure can effectively block and protect the debris flow. The phenomenon that debris flow climbs over and is blocked in the high potential energy and high speed state is avoided, the multiple drainage holes in the lower portion can effectively filter silt and water in the debris flow, the further erosion-coercing-amplification effect of the debris flow is reduced, and therefore the debris flow disaster volume is reduced, and the disaster-causing range is narrowed.

Description

Technical Field

[0001] The utility model belongs to the technical field of disaster prevention and control, and particularly relates to a novel debris flow blocking structure. Background Art

[0002] Debris flow refers to a special torrent of water that is generated in valleys or hillsides due to precipitation (rainstorm, glacier, snowmelt water) and carries a large amount of mud, sand, stones, boulders and other solid materials. Its water and sand collection process is very complicated and is the product of the combined effects of various natural and (or) human factors.

[0003] A typical debris flow is composed of a thick mud rich in silt and clay and suspended in coarse solid debris. Under appropriate terrain conditions, a large amount of water penetrates the solid deposits in the flowing hillside or ditch bed, reducing its stability. The water-saturated solid deposits move under their own gravity, forming a debris flow. At present, the most commonly used debris flow control measure is to use a retaining structure, such as a cable grid dam, a grille dam, a sieve dam, a comb dam, a permeable arch dam, etc. These retaining structures only retain and filter sediment in the middle and lower parts of the debris flow. However, various studies have shown that due to the particle sorting effect, large-size gravel or tree trunks carried by the debris flow mainly move in the upper part of the fluid, and even produce a phenomenon of overturning the barrier under high potential energy and high speed. Therefore, the existing debris flow retaining structure cannot effectively retain the upper part of the debris flow. Utility Model Content

[0004] In view of the above problems in the prior art, the utility model aims to provide a novel debris flow blocking structure, which solves the problem that the existing debris flow blocking structure cannot effectively block the upper part of the debris flow.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0006] A novel debris flow blocking structure is provided, which includes a retaining wall main body. A debris flow upper blocking device is arranged on the top of the retaining wall main body. The debris flow upper blocking device includes a plurality of net rods. The plurality of net rods are arranged in an "I" shape along the length direction of the top of the retaining wall main body and are evenly spaced. Each net rod is fixedly connected to the top of the retaining wall main body. Protective nets are fixedly arranged on the plurality of net rods.

[0007] The basic principle of the new debris flow blocking structure in the utility model is: by arranging an upper debris flow blocking device on the top of the retaining wall body, the protective net in the upper debris flow blocking device is used to block the rolling stones, trees, etc. on the upper part of the debris flow during the high-speed movement, so as to avoid the debris flow from climbing over the blocking under high potential energy and high speed state, reduce the volume of the debris flow during the movement, and thus reduce the disaster-causing scope of the debris flow.

[0008] Furthermore, as a specific setting method of the retaining wall body, the cross-section of the retaining wall body is a right-angled trapezoidal shape, the front and both side surfaces of the retaining wall body are vertical planes, the back of the retaining wall body is an inclined slope, and the upper end surface and lower end surface of the retaining wall body are horizontal planes; the upper debris flow blocking device is arranged on the upper end surface of the retaining wall body.

[0009] The front of the retaining wall is the front wave surface of the debris flow, while the back of the retaining wall is the back wave surface of the debris flow. The right-angle trapezoidal design enables the retaining wall to more effectively disperse and resist these pressures when it is impacted by the debris flow. This shape provides better stability, allowing the retaining wall to resist the impact and erosion of the debris flow.

[0010] Furthermore, as a specific fixed connection method between the net rod and the upper end face of the retaining wall body, the upper end face of the retaining wall body is vertically provided with prefabricated holes equal in number to the number of net rods, a net rod is fixed in each prefabricated hole, and the net rod is fixedly matched with the prefabricated hole by concrete pouring. The retaining wall body is made of reinforced concrete pouring, and prefabricated holes can be reserved during the pouring process to facilitate the subsequent fixing of the net rods.

[0011] Furthermore, an anchor rod is provided at both sides of the back of the retaining wall body along its length direction, and the two anchor rods are fixedly connected to the net rods located on both sides of the upper end surface of the retaining wall body through cables. The net rods are fixed to the anchor rods through cables, which can strengthen the structural strength of the entire debris flow upper blocking device and improve the impact resistance of the debris flow upper blocking device.

[0012] Furthermore, a plurality of drainage holes are provided through the lower part of the retaining wall body, and each drainage hole horizontally penetrates from the front side of the retaining wall body to the back side of the retaining wall body.

[0013] When a debris flow hits a retaining structure, due to the sorting effect during the movement of the particle flow, the large-sized boulders or other broken tree trunks carried by the debris flow will move in the upper part of the debris flow, while the small-sized particles of mud and sand will mainly move in the lower part of the debris flow. The setting of several drainage holes can effectively filter the small and medium-sized particles of mud and sand in the debris flow to avoid accumulation.

[0014] Furthermore, the axes of the plurality of drainage holes are parallel to each other and are evenly spaced.

[0015] Furthermore, the plurality of net poles and the protective net are prefabricated components. The net poles and the protective net can be prefabricated in a manufacturing factory according to the specific conditions on site, thereby speeding up the efficiency of the subsequent on-site construction of the new debris flow retaining structure and shortening the construction period.

[0016] The beneficial effects of the utility model are as follows: the new debris flow blocking structure of the utility model, when a large-volume debris flow moves at high speed, the large-size gravel and tree trunks carried along the way mainly move on the upper part of the debris flow, and the debris flow upper blocking device in the blocking structure of the utility model can effectively block and protect the debris flow, avoiding the phenomenon that the debris flow rolls over the blocking under high potential energy and high speed, and the several drainage holes at the bottom can effectively filter the mud and water in the debris flow, reduce the further erosion-entrainment-amplification effect of the debris flow, thereby reducing the volume of the debris flow disaster and narrowing the scope of the disaster. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional schematic diagram of a new type of debris flow barrier structure Figure 1 .

[0018] Figure 2 A three-dimensional schematic diagram of a new type of debris flow barrier structure Figure 2 .

[0019] Among them, 1. The main body of the retaining wall; 2. The mesh poles; 3. The protective net; 4. The prefabricated holes; 5. The anchor rods; 6. The cables; 7. The drainage holes. DETAILED DESCRIPTION

[0020] The specific implementation modes of the present invention are described below to facilitate the understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0021] like Figure 1-2 As shown, the utility model provides a novel debris flow blocking structure, which includes a retaining wall main body 1, and a debris flow upper blocking device is arranged on the top of the retaining wall main body 1. The debris flow upper blocking device includes a plurality of net rods 2, and the plurality of net rods 2 are arranged in an "I" shape along the length direction of the top of the retaining wall main body 1 and are evenly spaced. Each net rod 2 is fixedly connected to the top of the retaining wall main body 1, and a protective net 3 is fixedly arranged on the plurality of net rods 2.

[0022] Preferably, the plurality of net rods 2 and the protection net 3 are prefabricated components. The net rods 2 and the protection net 3 can be prefabricated in a manufacturing factory according to the specific conditions on site, thereby speeding up the subsequent on-site construction efficiency of the new debris flow barrier structure and shortening the construction period.

[0023] Preferably, but not limited to, the arrangement of the protection net 3 includes but is not limited to parallel, cross, or adding a flexible steel ring to the protection net.

[0024] By arranging an upper debris flow blocking device on the top of the retaining wall body 1, the protective net 3 in the upper debris flow blocking device is used to block the rolling stones, trees, etc. on the upper part of the debris flow during high-speed movement, so as to avoid the debris flow from climbing over the blocking under high potential energy and high speed, reduce the volume of the debris flow during movement, and thus reduce the disaster-causing scope of the debris flow.

[0025] Preferably, but not limited to, as a specific setting method of the retaining wall body 1, the cross-section of the retaining wall body 1 is a right-angled trapezoidal shape, the front and both side surfaces of the retaining wall body 1 are vertical planes, the back of the retaining wall body 1 is an inclined slope, and the upper end surface and the lower end surface of the retaining wall body 1 are horizontal planes; the upper debris flow blocking device is arranged on the upper end surface of the retaining wall body 1.

[0026] The front of the retaining wall body 1 is the front wave surface of the debris flow, while the back of the retaining wall body 1 is the back wave surface of the debris flow. The right-angled trapezoidal design enables the retaining wall body 1 to more effectively disperse and resist these pressures when subjected to the impact of the debris flow. This shape provides better stability, allowing the retaining wall to resist the impact and erosion of the debris flow.

[0027] As a specific fixed connection method between the net rod 2 and the upper end surface of the retaining wall body 1, the upper end surface of the retaining wall body 1 is vertically provided with prefabricated holes 4 of the same number as the net rod 2, and a net rod 2 is fixed in each prefabricated hole 4, and the net rod 2 is fixedly matched with the prefabricated hole 4 by concrete pouring. The retaining wall body 1 is made of reinforced concrete pouring, and the prefabricated holes 4 can be reserved during the pouring process to facilitate the subsequent fixing of the net rod 2.

[0028] Preferably, an anchor rod 5 is provided at both sides of the back of the retaining wall body 1 along the length direction thereof, and the two anchor rods 5 are fixedly connected to the net rods 2 located at both sides of the upper end surface of the retaining wall body 1 through the cable 6. The net rods 2 are fixed to the anchor rods 5 through the cable 6, which can strengthen the structural strength of the entire debris flow upper blocking device and improve the impact resistance of the debris flow upper blocking device.

[0029] A plurality of drainage holes 7 are provided through the lower part of the retaining wall body 1. Specifically, the axes of the plurality of drainage holes 7 are parallel to each other and are evenly spaced. Each drainage hole 7 is horizontally provided from the front of the retaining wall body 1 to the back of the retaining wall body 1. When a debris flow hits the retaining structure, due to the sorting effect in the movement of the particle flow, large-sized rolling stones or other broken tree trunks carried by the debris flow will move in the upper part of the debris flow, while small-sized particles of mud and sand will mainly move in the lower part of the debris flow. The provision of a plurality of drainage holes 7 can effectively filter the small and medium-sized particles of mud and sand in the debris flow to avoid accumulation.

[0030] To sum up, the new debris flow blocking structure of the utility model, when a large-volume debris flow moves at high speed, the large-size gravel and tree trunks carried along the way mainly move on the upper part of the debris flow, and the upper debris flow blocking device in the blocking structure of the utility model can effectively block and protect the debris flow, avoiding the phenomenon that the debris flow rolls over the blocking under high potential energy and high speed, and the several drainage holes 7 at the bottom can effectively filter the mud and water in the debris flow, reduce the further erosion-entrainment-amplification effect of the debris flow, thereby reducing the volume of the debris flow disaster and narrowing the scope of the disaster.

Claims

1. A new type of debris flow barrier structure, characterized in that: It includes a retaining wall body, the top of which is provided with an upper debris flow blocking device, the upper debris flow blocking device includes a plurality of net rods, the plurality of net rods are arranged in an "I" shape along the length direction of the top of the retaining wall body and are evenly spaced, each net rod is fixedly connected to the top of the retaining wall body, and a protective net is fixedly provided on the plurality of net rods.

2. The new debris flow blocking structure according to claim 1 is characterized in that: The cross-section of the retaining wall body is a right-angled trapezoid, the front and side surfaces of the retaining wall body are vertical planes, the back of the retaining wall body is an inclined slope, and the upper end surface and lower end surface of the retaining wall body are horizontal planes; the upper debris flow blocking device is arranged on the upper end surface of the retaining wall body.

3. The new debris flow blocking structure according to claim 2 is characterized in that: The upper end surface of the retaining wall body is vertically provided with prefabricated holes having the same number as the number of the mesh rods, and a mesh rod is fixed in each of the prefabricated holes, and the mesh rods are fixedly matched with the prefabricated holes by pouring concrete.

4. The new debris flow blocking structure according to claim 3 is characterized in that: An anchor rod is arranged at both sides of the back side of the retaining wall body along its length direction, and the two anchor rods are fixedly connected to the net rods located at both sides of the upper end surface of the retaining wall body through cables.

5. The new debris flow blocking structure according to claim 4 is characterized in that: A plurality of drainage holes are provided through the lower part of the retaining wall body, and each of the drainage holes horizontally penetrates from the front side of the retaining wall body to the back side of the retaining wall body.

6. The new debris flow blocking structure according to claim 5 is characterized in that: The axes of the plurality of drainage holes are parallel to each other and are evenly spaced.

7. The new debris flow blocking structure according to claim 6 is characterized in that: The plurality of net rods and the protective net are all prefabricated components.

Images