A landslide prevention structure of the cheval-de-frise type and its preparation method

Abstract

A landslide prevention structure in the shape of a cheval de frise and its preparation method. The structure includes a cheval de frise type lock. The cheval de frise type lock includes a plurality of cross tubes that cross in an X shape. A horizontal tube is fixed above the intersection point of the cross tubes. A support tree trunk and a horizontal tree trunk respectively pass through the cross tubes and the horizontal tube. The length of the part of the support tree trunk extending from the lower part is greater than the length of the part extending from the upper part, and the part extending from the lower part is used for support. The horizontal tree trunk connects a plurality of cross tubes in series into a row-shaped X-shaped cheval de frise structure that is parallel to each other. The present invention is used to intercept the movement of debris flows and consume the kinetic energy of debris flows. Since the cheval de frise type structure can be effectively widened, the inside of the structure can be fully contacted with debris flow particles, thereby achieving the purpose of intercepting the movement of debris flows. The structure of the present invention is simple and effective and can adapt to complex terrain environments and construction conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of debris flow prevention and control engineering, and particularly relates to a cheval-de-frise type debris flow prevention and control structure and a preparation method thereof. Background Art

[0002] Debris flow refers to a special flood in mountainous areas or other areas with deep valleys and steep terrain, which is caused by heavy rain, snowstorm or other natural disasters, resulting in landslides and carrying a large amount of sediment and stones. Debris flow has the characteristics of suddenness, fast flow velocity, large flow rate, large material capacity and strong destructiveness. Debris flow prevention and control is an important part of mountain disaster control. Traditional geotechnical engineering such as retaining dams and drainage channels has achieved important results in debris flow prevention and control, but the construction cost is high and the construction difficulty is great, and its application in debris flow prevention and control in small mountainous watersheds is very limited. At the same time, during the construction process of retaining dams and drainage channels and other geotechnical engineering, the requirements for transportation conditions and materials are very high, resulting in many gully channels with frequent debris flow disasters that cannot be treated in time. Moreover, the disturbance to the debris flow gully during the construction process is also very large, bringing many negative impacts to the development of the gully. In addition, restoration projects represented by check dams, although having low construction difficulty and high economy, are also affected by water flow scouring and are thus prone to damage. Summary of the Invention

[0003] In order to solve the problems of high cost and great construction difficulty of existing technologies for debris flow prevention and control, the present invention provides a cheval-de-frise type debris flow prevention and control structure and a preparation method thereof.

[0004] The technical solution of the present invention is as follows:

[0005] A cheval-de-frise type debris flow prevention and control structure, characterized in that: it includes a cheval-de-frise type lock, the cheval-de-frise type lock includes a plurality of cross tubes in an X shape, a horizontal tube is fixed above the intersection point of the cross tubes, a support tree trunk and a horizontal tree trunk respectively pass through the cross tubes and the horizontal tube, the length of the part of the support tree trunk extending downward is greater than the length of the part extending upward, and the part extending downward is used for support, and the horizontal tree trunk connects a plurality of cross tubes in series into a row-shaped X-shaped cheval-de-frise structure parallel to each other.

[0006] Preferably, the arrangement length of the cheval-de-frise type structure is slightly greater than the width of the gully cross-section, generally within the range of 5 - 10 m, and can be appropriately increased or decreased according to needs.

[0007] Preferably, natural stones are embedded in the hollow part below the intersection point of the cross tubes to increase the self-weight of the structure.

[0008] Preferably, the diameter at breast height of the support tree trunk is 10 - 15 cm, the diameter at breast height of the horizontal tree trunk is 10 - 15 cm, and the height is 100 - 150 cm.

[0009] Preferably, the cross tube and the horizontal tube are fixed by welding or binding, and the inner diameter of the tube is slightly larger than the diameter at breast height of the tree trunk.

[0010] The preparation method of the aforesaid chevaux-de-frise type structure is characterized in that: select a tree trunk with a diameter at breast height of 10 - 15 cm, sleeved the horizontal tubes of the chevaux-de-frise type lock on the tree trunk in turn as the horizontal support of the chevaux-de-frise type structure, select a tree trunk with a diameter at breast height of 10 - 15 cm and a height of 100 - 150 cm, embed the cross tubes of the chevaux-de-frise type lock, after filling multiple chevaux-de-frise type locks, arrange them in turn to form an X-shaped chevaux-de-frise.

[0011] Preferably, the chevaux-de-frise type structure is arranged in the channel, embed the tree trunk at the bottom of the cross tube into the soil body, or embed the tree trunks at both ends of the horizontal tube into the slope body to increase the structural stability.

[0012] The technical effects of the present invention are as follows:

[0013] The present invention provides a chevaux-de-frise type debris flow prevention and control structure and its preparation method, which is used to intercept the movement of debris flow and consume the kinetic energy of debris flow. Since the chevaux-de-frise type structure can be effectively widened, the inside of the structure can be fully contacted with debris flow particles, so as to achieve the purpose of intercepting the movement of debris flow. On the premise that the cross tube plays a fixing role, the horizontal tube designed by the present invention increases the expansion of the structural lateral space and is more suitable for the environment of intercepting debris flow. The structure of the present invention is simple and effective, and can adapt to complex terrain environments and construction conditions.

[0014] The chevaux-de-frise type structure can adapt to the movement of debris flow and make self-adjustment. Arranged in the channel, its length is generally designed according to the width of the cross section of the installation channel. The horizontal tree trunk and the supporting tree trunk can be embedded into the soil body to play an anchoring role, increase the stability of the structure, and further play the role of intercepting sediment and separating water and sediment.

[0015] For the chevaux-de-frise type structure provided by the present invention, its inside can be filled and fixed with natural stones, and it has the ability to break fluids and resist scouring by clear water. It is especially suitable for debris flow channels in small watersheds, and the structure can be embedded into the soil body. Therefore, the chevaux-de-frise type structure provided by the present invention has high stability.

[0016] The horizontal tree trunk and the supporting tree trunk can directly take materials at the construction site or be assembled after being transported to the site.

[0017] The structure of the present invention is simple in design, low in construction difficulty, high in economy and can effectively intercept debris flow, and can achieve the purpose of large-area popularization in debris flow channels of small watersheds. It has good stability, is convenient to move, can be widely promoted in debris flow channels, and has low configuration difficulty and high speed. Description of the Drawings

[0018] Figure 1 It is the overall schematic diagram of a chevaux-de-frise type structure according to an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the cheval-de-frise type lock of the embodiment of the present invention;

[0020] Figure 3 Cross-sectional view of a layout method of the cheval-de-frise type structure of the embodiment of the present invention.

[0021] Reference numerals:

[0022] 1 - Cheval-de-frise type lock, 2 - Horizontal tree trunk, 3 - Support tree trunk, 4 - Cross pipe, 5 - Horizontal pipe. Detailed implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] On the contrary, the present application covers any alternatives, modifications, equivalent methods and solutions made within the essence and scope of the present application defined by the claims. Further, in order to enable the public to have a better understanding of the present application, in the following detailed description of the present invention, some specific details are described in detail. Those skilled in the art can fully understand the present application without the description of these details.

[0025] Embodiment 1

[0026] A cheval-de-frise type debris flow prevention and control structure of this embodiment, as Figures 1-3 shown, includes a cheval-de-frise type lock 1, the cheval-de-frise type lock 1 includes a plurality of cross pipes 4 that cross in an X shape, a horizontal pipe 5 is fixed above the intersection point of the cross pipes 4, a support tree trunk 3 and a horizontal tree trunk 2 respectively pass through the cross pipes 4 and the horizontal pipe 5, the length of the part of the support tree trunk 3 extending from the lower part is greater than the length of the part extending from the upper part, and the part extending from the lower part is used for support, and the horizontal tree trunk 2 connects a plurality of cross pipes 4 in series into a row-shaped X-shaped cheval-de-frise structure parallel to each other.

[0027] Among them, the horizontal tree trunk 2 uses a tree trunk with a breast diameter of 10 - 15 cm, and both ends can extend into the slope body to increase the stability of the structure; the support tree trunk 3 uses a tree trunk with a breast diameter of 10 - 15 cm and a height of 100 - 150 cm, and the bottom can extend into the soil body to increase the connection between the structure and the ground.

[0028] The cheval-de-frise type structure provided by the present invention has a cheval-de-frise type lock as its core component for connecting tree trunks. The three pipes can be fixed by welding or tying, and the inner diameter of the pipe is slightly larger than the breast diameter of the tree trunk.

[0029] The arrangement length of the cheval-de-frise type structure described in this embodiment is slightly greater than the width of the channel cross-section, generally within the range of 5 - 10 m, and can be increased or decreased as needed.

[0030] In some preferred embodiments, the hollow part below the intersection of the cross pipes can be filled and fixed with natural stones, which has the ability to break the fluid and resist the scouring of clear water. It is particularly suitable for debris flow channels in small watersheds, and the structure can be embedded in the soil. Therefore, the cheval-de-frise type structure provided by the present invention has relatively high stability.

[0031] In addition, when sediment gradually accumulates upstream of the cheval-de-frise type structure and forms a stepped shape, it will increase the shape resistance of the channel, thus facilitating the suppression of debris flow movement.

[0032] Embodiment 2

[0033] This embodiment is a construction method of a cheval-de-frise type structure, including the following steps:

[0034] Determine the construction position in the channel according to the designed cheval-de-frise dimensions;

[0035] After transporting the cheval-de-frise type lock to the construction site, collect tree trunks according to the tree conditions on site. If necessary, an appropriate amount of tree trunks can be transported as raw materials;

[0036] First, embed the horizontal tree trunk 2 into the horizontal pipe 5 as a horizontal support, then select the support tree trunk 3 and embed it into the cross pipe 4 of the cheval-de-frise type lock. After filling the cross pipes 4 of multiple cheval-de-frise type locks, arrange them in sequence to form an X-shaped cheval-de-frise;

[0037] Excavate the foundation trench at the construction position, insert the cheval-de-frise type structure into the trench, then backfill and fix it, and fill natural stones inside the cheval-de-frise type structure to increase its self-weight.

[0038] In some embodiments, the length and quantity of the cheval-de-frise type structure are adjusted according to the channel conditions. Especially when selecting a cross-section with a relatively narrow channel width, the construction cost can be reduced.

[0039] In some embodiments, the cheval-de-frise type lock should be prepared according to the tree conditions on site, and its inner diameter is slightly larger than the diameter at breast height of the tree trunk.

[0040] In some embodiments, after the cheval-de-frise type structure is displaced along with the debris flow movement, it can still break the fluid and intercept sediment, and can be reused.

[0041] In summary, a cheval-de-frise type debris flow prevention and control structure and its preparation method provided by the above embodiments fix the tree trunks through the cheval-de-frise type locks, embed the top ends of the tree trunks into the soil, and fill natural stones inside the cheval-de-frise type structure, improving the structural stability and ultimately achieving the purpose of intercepting debris flow.

Claims

1. A debris flow prevention and control structure of the horse-blocking type, characterized in that: It includes a chevaux-de-frise type lock catch. The chevaux-de-frise type lock catch includes multiple cross pipes in an X-cross shape. A horizontal pipe is fixed above the intersection point of the cross pipes. A support tree trunk and a horizontal tree trunk pass through the cross pipes and the horizontal pipe respectively. The length of the part of the support tree trunk extending from the lower part is greater than that extending from the upper part, and the part extending from the lower part is used for support. The horizontal tree trunk connects multiple cross pipes in series into a row-shaped X-shaped chevaux-de-frise structure that is parallel to each other. The horizontal pipe can increase the width of the chevaux-de-frise type debris flow prevention and control structure at any time. The hollow part at the lower part of the intersection point of the cross pipes is embedded with natural stones.

2. The anti-horse type debris flow prevention and control structure according to claim 1, characterized in that: The arrangement length of the X-shaped chevaux-de-frise structure is 5 - 10 m.

3. A kind of anti-horse type debris flow prevention and control structure according to claim 1, characterized in that: The diameter at breast height of the horizontal tree trunk passing through the horizontal pipe is 10 - 15 cm, and the diameter at breast height of the support tree trunk passing through the cross pipe is 10 - 15 cm, and the height is 100 - 150 cm.

4. A kind of anti-horse type debris flow prevention and control structure according to claim 1, characterized in that: The cross pipes and the horizontal pipe are fixed by welding or tying, and the inner diameter of the pipe is slightly larger than the diameter at breast height of the tree trunk.

5. The preparation method of a cheval-de-frise type debris flow prevention and control structure according to any one of claims 1-4, characterized in that: Select a tree trunk with a diameter at breast height of 10 - 15 cm, and sequentially put the horizontal pipes of the chevaux-de-frise type lock catch on the tree trunk as the horizontal support of a chevaux-de-frise type debris flow prevention and control structure. Select a tree trunk with a diameter at breast height of 10 - 15 cm and a height of 100 - 150 cm, and embed it into the cross pipes of the chevaux-de-frise type lock catch. After filling multiple chevaux-de-frise type lock catches, arrange them in sequence to form an X-shaped chevaux-de-frise.

6. The method according to claim 5, wherein The X-shaped chevaux-de-frise structure embeds the tree trunk at the bottom of the cross pipe into the soil body, or embeds the horizontal tree trunk into the slope body.

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