An arched pile forest dam for preventing and treating debris flow

Abstract

The utility model discloses a kind of arched pile forest dams for mud-rock flow prevention, including face shunt pile, back support pile, shunt crossbeam, connecting crossbeam of end point intersection, the face shunt pile, back support pile are divided into two rows of mutually parallel by bottom foundation arc shape pouring fixed in mud-rock flow channel bottom surface and outer convex portion is set as water face.The face shunt pile, back support pile, shunt crossbeam of circular arch shape in the utility model can be shunted in larger range, and the overall impact resistance is enhanced;Meanwhile, when pouring connecting crossbeam, each face shunt pile can be supported by two back support piles simultaneously with it as center, to form triangular support structure, and then improve the impact resistance of each face shunt pile, so that the overall impact resistance of the structure is improved by the synergistic effect between each mechanism.

Description

Technical Field

[0001] This utility model patent belongs to the technical field of debris flow prevention and control devices, specifically relating to an arched pile forest dam for debris flow prevention and control. Background Technology

[0002] Debris flows are special types of floods containing large amounts of mud, sand, rocks, and solid materials such as dead grass and trees. They erupt suddenly and are extremely powerful, causing significant casualties and property damage, such as collapsed houses and blocked roads. Yunnan Province is a mountainous region where flash floods and debris flows are frequent. In recent years, debris flows triggered by high-altitude, long-distance landslides have become even more destructive and difficult to prevent.

[0003] Currently, the main approach to debris flow control involves engineering projects such as interception, drainage, and slope protection to control the replenishment conditions and reduce hydrodynamic conditions, thereby achieving the goal of control. This method requires favorable terrain conditions to implement these projects. For example, interception projects require relatively gentle longitudinal slopes and wide channels to accommodate large dam reservoirs. However, interception projects are prone to a series of stability and safety hazards, such as dam foundation undercutting, erosion around the dam, and dam failure, and cannot completely eliminate the hazards of debris flows. Drainage projects require relatively straight channel shapes and sufficient scour depth to ensure the stability of the sidewalls. Drainage projects are prone to foundation undercutting, overturning, and collapse of the sidewalls, as well as bottom scour and erosion. Currently, due to the advantages of high rigidity, strong impact resistance, good interception effect, and good durability, pile forest structures have gradually become a commonly used debris flow block interception structure. Commonly used pile forest structures often have circular or rectangular cross sections. However, when facing high-speed flowing debris flow disasters, these types of piles often have to withstand huge impact loads, so their cross sections are generally large, making the structure bulky and wasteful.

[0004] In the prior art, to solve the above problems, such as the truncated pile and truncated pile forest dam disclosed in Chinese Patent (CN109113029B), there are truncated pile bodies and bottom foundations fixed to the bottom surface of the truncated piles. The truncated pile bodies are fixed to the bottom surface of the debris flow riverbed through the bottom foundations. The water-facing surface of the truncated pile bodies is formed by two buffer surfaces after bending in the direction of debris flow. The bending line is a diversion buffer ridge that is inclined in the direction of debris flow.

[0005] However, this structure has its flaws: although the triangular truncated piles can divert debris flows and reduce the impact load, the stability of a single truncated pile still largely depends on the cast-in-place portion at its base. After being subjected to high-speed impact from debris flows, each individual pile, even with its triangular prism, is unlikely to withstand prolonged impact. If a pile breaks and tilts, it will disrupt the flow diversion between the truncated pile group, thereby increasing the impact load on the tilted part of the structure, shortening its service life, and in severe cases, it may lead to collapse or breach.

[0006] Therefore, this paper provides an arched pile forest dam for debris flow prevention. Utility Model Content

[0007] To address the aforementioned technical problems, this utility model provides an arched pile forest dam for debris flow prevention. The arched front diversion piles, rear support piles, and diversion beams allow for wider diversion and enhance overall impact resistance. Simultaneously, during the casting of the connecting beams, each front diversion pile is supported by two rear support piles, forming a triangular support structure. This further improves the impact resistance of each front diversion pile. Thus, the synergistic effect between these mechanisms enhances the overall impact resistance of the structure.

[0008] To achieve the above-mentioned technical effects, this utility model is implemented through the following technical solution: an arched pile forest dam for debris flow prevention, comprising front diversion piles, back support piles, diversion beams, and connecting beams with intersecting ends. The front diversion piles and back support piles are divided into two parallel rows and are fixed to the bottom surface of the debris flow channel by casting in an arc shape on the bottom foundation, with the convex part set as the water-facing surface. Each row of front diversion piles and back support piles is connected from the ground upwards by several sets of arc-shaped diversion beams, with the convex part set as the water-facing surface. The front diversion piles and back support piles are connected by intersecting connecting beams.

[0009] Preferably, the number of the front row of diversion piles is more than one rear row of back support piles, and each rear row of back support piles is aligned with each pair of front row diversion piles.

[0010] Preferably, the back of each of the facing diversion piles is connected to the water-facing surface of the back support piles on both sides of the back of the facing diversion pile by two intersecting connecting beams.

[0011] Preferably, the water-facing side of the diversion pile is configured with a triangular or arc-shaped end face, and the water-repellent side of the diversion pile is configured with a rectangular or concave arc-shaped plane.

[0012] Preferably, the top of the rear support pile is lower than the front diversion pile.

[0013] Preferably, both ends of the diversion beam extend into the mountainside cast on both sides of the ditch.

[0014] Preferably, both ends of the diversion beam extend into the anti-slide piles cast on both sides of the ditch.

[0015] The beneficial effects of this utility model are: In this invention, the arched front diversion piles, rear support piles, and diversion beams can divert the flow over a wider area and enhance the overall impact resistance. Simultaneously, during the casting of the connecting beams, each front diversion pile is supported by two rear support piles, forming a triangular support structure. This further improves the impact resistance of each front diversion pile. Conversely, each rear support pile is simultaneously held in place by two front diversion piles. When a debris flow ends and leaves behind a large accumulation of soil and rocks, the two front diversion piles together pull and hold the soil and rocks in place. Thus, the synergistic effect between these mechanisms enhances the overall impact resistance of the structure. The triangular or arc-shaped end face of the facing diversion pile is designed to divert and buffer debris flows, while the rectangular or concave arc-shaped plane of the back face is designed to connect the facing face of the back support pile through the connecting beam, thereby providing more stable support. The back support pile, which is lower than the facing diversion pile, is designed so that when the soil and rocks in front of the facing diversion pile are too high, the mud and water will no longer be blocked by the two layers of piles, but will flow quickly through the upper part of the facing diversion pile and then from the top of the back support pile, before being intercepted by the next set of arched piles in the forest dam. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. Figure 1 This is a structural diagram of the present invention; Figure 2 This is a top view of the present invention; The attached diagram lists the components represented by each number as follows: 1. Frontal diversion pile; 2. Rear support pile; 3. Diversion crossbeam; 4. Connecting crossbeam. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Example 1

[0018] like Figures 1 to 2 As shown, the prior art in this embodiment has the following problems: The inventors found that the prior art also has defects: Although the triangular truncated piles can divert debris flow and reduce the impact load, the stability of a single truncated pile still largely depends on the bottom of the cast-in-place part. After being impacted by the high speed of the debris flow, each independent pile, even with the triangular prism, is difficult to withstand the impact for a long time. Once a pile breaks and tilts, it will disrupt the diversion between the truncated pile groups, thereby increasing the impact load on the tilted part of the structure, shortening its service life, and in severe cases, it cannot be ruled out that a collapse or breach accident may occur.

[0019] Therefore, the inventor provides an arched pile forest dam for debris flow prevention, including a front diversion pile 1, a back support pile 2, a diversion crossbeam 3, and a connecting crossbeam 4 with intersecting ends. The front diversion pile 1 and the back support pile 2 are divided into two parallel rows and are fixed to the bottom surface of the debris flow channel by casting in an arc shape on the bottom foundation, with the convex part set as the water-facing surface. Each row of the front diversion pile 1 and the back support pile 2 is connected from the ground upwards by several sets of arc-shaped diversion crossbeams 3, with the convex part set as the water-facing surface. The front diversion pile 1 and the back support pile 2 are connected by intersecting connecting crossbeams 4.

[0020] Its effect and principle are as follows: The arched front diversion pile 1, back support pile 2, and diversion beam 3 of this utility model can divert the flow over a larger range and enhance the overall impact resistance. At the same time, when the connecting beam 4 is poured, each front diversion pile 1 can be supported by two back support piles 2 with it as the center, thus forming a triangular support structure, thereby improving the impact resistance of each front diversion pile 1. Meanwhile, looking at it from the opposite perspective, each back support pile 2 is simultaneously pulled by two front diversion piles 1 in the front row. When a large amount of soil and rocks are left after the debris flow ends, they can be pulled and held by the two front diversion piles 1 in the front row. In this way, the overall impact resistance of the structure is improved through the synergistic effect between the various mechanisms. The triangular or arc-shaped end face of the facing diversion pile 1 is designed to divert and buffer the debris flow, while the rectangular or concave arc-shaped plane of the back face is designed to connect the facing face of the back support pile 2 through the connecting beam 4, thereby providing more stable support. The back support pile 2, which is lower than the facing diversion pile 1, is designed so that when the soil and rocks in front of the facing diversion pile 1 are too high, the mud and water will no longer be blocked by the two layers of piles, but will flow quickly through the upper part of the facing diversion pile 1 and then from the top of the back support pile 2, where it will be intercepted by the next set of arched pile forest dams.

[0021] Furthermore, the number of front-facing diversion piles 1 is greater than the number of rear-facing support piles 21, and each rear-facing support pile 2 is aligned with every two front-facing diversion piles 1.

[0022] Furthermore, the back of each facing diversion pile 1 is connected to the water-facing surface of the back support piles 2 on both sides of the back of the facing diversion pile 1 by two intersecting connecting beams 4. This structural design facilitates the casting of the connecting beams 4, so that each facing diversion pile 1 can be supported by the two back support piles 2 simultaneously with the beams 4 as the center, thus forming a triangular support structure, thereby improving the impact resistance of each facing diversion pile 1. At the same time, looking at it from the opposite perspective, each back support pile 2 is simultaneously pulled by the two facing diversion piles 1 in the front row. When a large amount of soil and rocks are left after the debris flow ends, the two facing diversion piles 1 in the front row can pull and hold the soil and rocks together. In this way, the overall impact resistance of the structure is improved through the synergistic effect between the various mechanisms.

[0023] Furthermore, the water-facing side of the diversion pile 1 is configured with a triangular or arc-shaped end face, and the water-repellent side of the diversion pile 1 is configured with a rectangular or concave arc-shaped plane. The triangular or arc-shaped end face in this structure is designed to divert and buffer debris flows, and the rectangular or concave arc-shaped plane on the water-repellent side is designed to connect the water-facing side of the back support pile 2 through the connecting beam 4, thereby providing more stable support.

[0024] Furthermore, the top of the back support pile 2 is lower than the front diversion pile 1; this structure is designed so that when the soil and rocks in front of the front diversion pile 1 are too high, the mud and water will no longer be blocked by the two layers of piles, but will flow quickly through the upper part of the front diversion pile 1 and then from the top of the back support pile 2, and be intercepted by the next set of arched piles in the forest dam.

[0025] Furthermore, both ends of the diversion beam 3 extend into the mountainside cast on both sides of the ditch; this structural design can improve the overall stability and impact resistance of the mechanism.

[0026] Furthermore, both ends of the diversion beam 3 extend into the anti-slide piles cast on both sides of the ditch; this structural design can improve the stability and impact resistance of the overall mechanism.

[0027] It should be understood that when the engineering geological conditions of the two bank slopes cannot meet the stress requirements of the diversion beam 3 of the pile-forest dam, it is necessary to build anti-sliding piles on both sides of the pile-forest dam to connect the diversion beam 3, and thus serve as the foundation for the stability of the pile-forest dam. Therefore, the inventor left this solution.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An arched pile forest dam for debris flow prevention, characterized in that: It includes front diversion piles (1), back support piles (2), diversion beams (3), and connecting beams (4) with intersecting ends. The front diversion piles (1) and back support piles (2) are divided into two parallel rows. They are fixed to the bottom surface of the debris flow channel by casting in an arc shape on the bottom foundation, and the convex part is set as the water-facing surface. The piles of each row of the front diversion piles (1) and the back support piles (2) are connected from the ground upward by several sets of arc-shaped diversion beams (3), and the convex part is set as the water-facing surface. The front diversion piles (1) and the back support piles (2) are connected by intersecting connecting beams (4).

2. The arched pile forest dam for debris flow prevention according to claim 1, characterized in that: The number of the front row diversion piles (1) is more than the number of the rear row back support piles (2) by one. Each of the rear row back support piles (2) is aligned with each of the two front row diversion piles (1).

3. The arched pile forest dam for debris flow prevention according to claim 1, characterized in that: The back of each of the aforementioned diversion piles (1) is connected to the water-facing surface of the back support piles (2) on both sides behind the diversion piles (1) by two intersecting connecting beams (4).

4. An arched pile forest dam for debris flow prevention according to claim 1, characterized in that: The water-facing side of the diversion pile (1) is set to be triangular or arc-shaped at the end, and the water-repellent side of the diversion pile (1) is set to be rectangular or concave arc-shaped plane.

5. An arched pile forest dam for debris flow prevention according to claim 1, characterized in that: The top of the back support pile (2) is lower than the front diversion pile (1).

6. An arched pile forest dam for debris flow prevention according to claim 1, characterized in that: The two ends of the diversion beam (3) extend into the mountains cast on both sides of the ditch.

7. An arched pile forest dam for debris flow prevention according to claim 1, characterized in that: Both ends of the diversion beam (3) extend into the anti-slide piles cast on both sides of the ditch.

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