Active energy dissipation type debris flow grid dam and construction method thereof

Abstract

This invention discloses an active energy-dissipating debris flow grid dam and its construction method. The grid dam includes columns, beams, and U-shaped connectors. The columns and beams are connected by the U-shaped connectors to form a reliable and stable protection system. The U-shaped connectors consist of a U-shaped connecting pipe, two sealing plates, two push plates, two push rods, air, absorbent material, two baffles, and an air valve. The U-shaped connecting pipes connect the upper and lower beams. The beams transmit force to the other push rod and beam through compressed air via a push rod, achieving the purpose of dissipating debris flow. In this invention, the structural system itself does not consume energy, the cross-sectional dimensions of the structural components are greatly reduced, saving costs. The U-shaped connectors clearly transmit force, achieving active energy dissipation of debris flow, increasing the overall impact resistance of the structure, and ensuring structural safety and reliability.

Description

Technical Field

[0001] This invention relates to the field of debris flow prevention and control engineering, specifically to an active energy-dissipating debris flow grid dam and its construction method. Background Technology

[0002] The key feature of debris flow grid dams is their combination of interception and drainage, achieving soil-water separation and preventing the impact and damage of large rocks downstream. Traditional debris flow control structures are designed to enhance their strength and stiffness or alter their spatial form to improve their impact resistance. These structures are often in a passive stress-bearing state, representing a "hard" energy dissipation method, which leads to large structural component cross-sectional dimensions and high costs. To address this, scholars have proposed various new structures based on the concept of "flexible efficiency" to improve structural stress performance, increase overall impact resistance, and reduce structural component cross-sectional dimensions. However, these structures still require material deformation to dissipate debris flow, remaining passive energy dissipation, and are inevitably subject to damage under repeated debris flow impacts. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide an active energy-dissipating debris flow grid dam and its construction method. The active energy-dissipating debris flow grid dam has strong impact resistance, a simple structural system, and a safe and reliable structure.

[0004] This invention is achieved through the following technical solution:

[0005] An active energy-dissipating debris flow grid dam includes columns, crossbeams, and U-shaped connectors;

[0006] Several columns are set at equal intervals. Several vertically arranged U-shaped connectors are fixed on each column from top to bottom. Each crossbeam is fixedly connected to one end of a U-shaped connector at the same height. Several crossbeams are connected to several columns through U-shaped connectors to form a grid structure.

[0007] The U-shaped connector includes a U-shaped connecting pipe, with two sealing plates welded to the two ends of the U-shaped connecting pipe respectively; two push plates are placed inside the U-shaped connecting pipe and can move back and forth, forming a sealing structure with the inner wall of the U-shaped connecting pipe; two push rods pass through one end of the sealing plate and are fixedly connected to the push plate, and the rear ends of the push rods are connected to the crossbeam respectively; the air valve is connected to the U-shaped connecting pipe and is used to supplement air to the closed area between the two push plates.

[0008] Furthermore, the baffle is welded inside the U-shaped connecting pipe between the sealing plate and the push plate, and water-absorbing material is filled between the baffle and the sealing plate; the front end of the push rod passes through the sealing plate, the water-absorbing material, and the baffle in sequence and is then fixedly connected to the push plate.

[0009] Furthermore, the column is a C-shaped channel steel, and each U-shaped connector is fixed on the web of the C-shaped channel steel. The flange width of the C-shaped channel steel is greater than the outer diameter of the U-shaped connector.

[0010] Furthermore, the U-shaped connecting tube has a circular cross-section, and the annular sealing plate is embedded in and fixed within the U-shaped connecting tube, with a low-friction coefficient material inlaid in the inner ring.

[0011] Furthermore, the push plate is a rubber plate.

[0012] Furthermore, the water-absorbing material is a lightweight water-absorbing and swelling material.

[0013] Furthermore, the U-shaped connecting pipe consists of two horizontal sections and one vertical section. The sum of the thickness of the push plate and the length of the push rod is equal to the length of the horizontal section of the U-shaped connecting pipe. A connecting plate is welded to the rear end of the push rod, and the rear end of the push rod is connected to the crossbeam through the connecting plate. The distance between the centers of the two horizontal sections of the U-shaped connecting pipe is consistent with the distance between the centers of the two crossbeams.

[0014] Furthermore, the baffle is a ring-shaped steel plate, welded to the middle of the horizontal section inside the U-shaped connecting pipe.

[0015] Furthermore, the air valve is located at the bend outside the U-shaped connecting pipe.

[0016] A construction method for an active energy-dissipating debris flow grid dam includes the following construction steps:

[0017] (1) Determine the vertical spacing of the crossbeams according to the design requirements, and prefabricate the U-shaped connecting pipes so that the distance between the centers of the two horizontal sections of the U-shaped connecting pipes is consistent with the spacing of the crossbeams;

[0018] (2) Insert the columns into the site of the dam according to the design spacing and backfill them. Weld the U-shaped connector to the column and connect the crossbeam to the back end of the push rod with bolts.

[0019] (3) Open the air valve and pump air into the U-shaped connecting pipe through the air cylinder. Control the air to ensure that when one push rod is compressed, the front end of the other push rod is in close contact with the baffle. Then close the air valve. Adjust the crossbeam to make it on the same vertical line.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] (1) This invention is an active energy-dissipating structure, and the structure itself does not consume energy. The communicating vessel makes reasonable use of air as the force transmission medium. When the impact force of the debris flow acts on the crossbeam, the crossbeam uses push rods and push plates to compress air and transmit the force in the opposite direction to another crossbeam, realizing active energy dissipation of the debris flow, increasing the overall impact resistance of the structure, and ensuring the safety and reliability of the structure. The prevention and control structure itself only serves as a force transmission medium, and the structural system itself does not consume energy. The cross-sectional dimensions of the structural components are greatly reduced, saving costs.

[0022] (2) This invention is an active energy-dissipating debris flow grid dam. The U-shaped connecting pipe connects the upper and lower layers of crossbeams. The crossbeams transmit force to another pusher and crossbeam through compressed air via a pusher rod, thereby achieving the purpose of dissipating debris flow. This fundamentally changes the traditional force concept of "hard resistance energy dissipation" and "flexible energy dissipation" in debris flow prevention structures. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the grid dam of the present invention.

[0024] Figure 2 This is a schematic diagram of the crossbeam and communicating vessel of the present invention.

[0025] Figure 3 for Figure 1 Schematic diagram of a U-shaped communicating vessel

[0026] Figure 4 for Figure 1 Schematic diagram of the connection between the central connecting rod and the push plate, baffle and sealing plate

[0027] In the diagram: 1-Column, 2-Beam, 3-U-shaped connector, 4-U-shaped connecting pipe, 5-Sealing plate, 6-Push plate, 7-Push rod, 8-Air, 9-Absorbent material, 10-Baffle, 11-Air valve. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0029] like Figure 1 and Figure 2 As shown, the active energy-dissipating debris flow grid dam of the present invention includes columns 1, crossbeams 2 and U-shaped connectors 3; several columns are arranged at equal intervals, and several U-shaped connectors 3 are fixed on each column 1 from top to bottom. The U-shaped connectors 3 connected to each column 1 face the same direction. Each crossbeam 2 is fixedly connected to one end of a U-shaped connector 3 located at the same height. Several crossbeams 2 are connected to several columns 1 through U-shaped connectors 3 to form a grid structure.

[0030] like Figure 3 As shown, the U-shaped connector 3 includes a U-shaped connecting pipe 4, two sealing plates 5, two push plates 6, two push rods 7, air 8, absorbent material 9, two baffles 10, and an air valve 11; the two sealing plates 5 are respectively welded to the two ends of the U-shaped connecting pipe 4, the two push plates 6 are placed inside the U-shaped connecting pipe 4 and can move back and forth, forming a sealing structure with the inner wall of the U-shaped connecting pipe 4, the two push rods 7 pass through the front ends of the two sealing plates 5 and are fixed to the push plates 6, and the rear ends of the push rods 7 are connected to the crossbeam 2; the air 8 is sealed inside the U-shaped connecting pipe 4 by the two push plates 6.

[0031] Baffle 10 is welded inside the U-shaped connecting pipe 4, located between sealing plate 5 and push plate 6. Absorbent material 9 fills the space between baffle 10 and sealing plate 5. The front end of push rod 7 passes sequentially through sealing plate 5, absorbent material 9, and baffle 10 before being fixed to push plate 6. Air valve 11 is connected to the U-shaped connecting pipe 4 and is used to replenish air to the enclosed area between the two push plates 6. Each U-shaped connector 3 is independent of the others, connecting only the upper and lower crossbeams 2, thus avoiding the problem of unclear force transmission.

[0032] like Figure 1 As shown, the column 1 is a C-shaped channel steel, and each U-shaped connector 3 is fixed on the web of the C-shaped channel steel. The flange width of the C-shaped channel steel is greater than the outer diameter of the U-shaped connecting pipe 4, which avoids damage to the connecting pipe 4 by the stones.

[0033] like Figure 4 As shown, the U-shaped connecting pipe 4 has a circular cross-section; the sealing plate 5 is annular, and the inner ring can be inlaid with a material with a low coefficient of friction to reduce the friction between the push rod and the sealing plate.

[0034] like Figure 4 As shown, the push plate 6 is a rubber plate. The rubber material can reduce the friction between the push plate 6 and the U-shaped connecting pipe 4 and increase the air tightness.

[0035] like Figure 3 As shown, the water-absorbing material 9 is a lightweight water-absorbing and expanding material to prevent mud flow from entering the U-shaped connecting pipe 4.

[0036] like Figure 3 As shown, the U-shaped connecting pipe 4 consists of two horizontal sections and one vertical section. The sum of the thickness of the push plate 6 and the length of the push rod 7 is equal to the length of the internal horizontal section of the U-shaped connecting pipe 4, preventing the exposed part from being damaged by mudslides due to excessive push rod length. A connecting plate is welded to the rear end of the push rod 7, and the rear end of the push rod 7 is connected to the crossbeam through the connecting plate. The distance between the centers of the two horizontal sections of the U-shaped connecting pipe 4 is consistent with the center distance between the two crossbeams 2.

[0037] like Figure 3 As shown, the baffle 10 is an annular steel plate, welded to the middle of the horizontal section inside the U-shaped connecting pipe 4, which prevents the other push rod 7 from being pushed out by the air reaction force when one push rod 7 compresses air inside the U-shaped connecting pipe 4.

[0038] like Figure 3 As shown, the air valve 11 is located at the bend outside the U-shaped connecting pipe 4.

[0039] This invention also provides a construction method for an active energy-dissipating debris flow grid dam, comprising the following construction steps:

[0040] (1) Determine the vertical spacing of the crossbeam 2 according to the design requirements, and prefabricate the U-shaped connector 3 so that the distance between the centers of the two horizontal sections of the U-shaped connector 4 is consistent with the spacing of the crossbeam 2.

[0041] (2) Insert the column 1 into the site of the dam according to the design spacing and fill it. Weld the U-shaped connector 3 to the column 1 and connect the crossbeam 2 to the rear end of the push rod 7 with bolts.

[0042] (3) Open the air valve 11 and pump air into the U-shaped connecting pipe 4 through an air cylinder or other equipment. Control the air 8 to fill the pipe so that when one push rod 7 is compressed, the front push plate 6 of the other push rod 7 is in close contact with the baffle 10. Then close the air valve 11. Adjust the crossbeam 2 so that it is on the same vertical line.

Claims

1. An active energy-dissipating debris flow grid dam, characterized in that: It includes columns (1), beams (2) and U-shaped connectors (3); Several columns (1) are set at equal intervals. Several vertically arranged U-shaped connectors (3) are fixed on each column (1) from top to bottom. Each beam (2) is fixedly connected to one end of the U-shaped connector (3) at the same height. Several beams (2) are connected to several columns (1) through U-shaped connectors (3) to form a grid structure. The U-shaped connector (3) includes a U-shaped connecting pipe (4), two sealing plates (5) are welded to the two ends of the U-shaped connecting pipe (4); two push plates (6) are placed inside the U-shaped connecting pipe (4) and can move back and forth, forming a sealing structure with the inner wall of the U-shaped connecting pipe (4); two push rods (7) pass through the sealing plate (5) at one end and are fixed to the push plate (6); the rear end of the push rods (7) is connected to the crossbeam (2); the air valve (11) is connected to the U-shaped connecting pipe (4) and is used to supplement air to the closed area between the two push plates (6).

2. The active energy-dissipating debris flow grid dam according to claim 1, characterized in that: The baffle (10) is welded inside the U-shaped connecting pipe (4) and located between the sealing plate (5) and the push plate (6), and the space between the baffle (10) and the sealing plate (5) is filled with absorbent material (9); the front end of the push rod (7) passes through the sealing plate (5), the absorbent material (9), and the baffle (10) in sequence and is then fixedly connected to the push plate (6).

3. The active energy-dissipating debris flow grid dam according to claim 2, characterized in that: The column (1) is a C-shaped channel steel, and each U-shaped connector (3) is fixed on the web of the C-shaped channel steel. The flange width of the C-shaped channel steel is greater than the outer diameter of the U-shaped connector (4).

4. An active energy-dissipating debris flow grid dam according to claim 1, 2 or 3, characterized in that: The U-shaped connecting tube (4) has a circular cross-section, and the annular sealing plate (5) is embedded in the U-shaped connecting tube (4) for fixation. The inner ring is inlaid with a low friction coefficient material.

5. The active energy-dissipating debris flow grid dam according to claim 4, characterized in that: The push plate (6) is a rubber plate.

6. An active energy-dissipating debris flow grid dam according to claim 2 or 3, characterized in that: The water-absorbing material (9) is a lightweight water-absorbing and swelling material.

7. The active energy-dissipating debris flow grid dam according to claim 4, characterized in that: The U-shaped connecting pipe (4) consists of two horizontal sections and one vertical section. The sum of the thickness of the push plate (6) and the length of the push rod (7) is equal to the length of the horizontal section of the U-shaped connecting pipe (4). A connecting plate is welded to the rear end of the push rod (7). The rear end of the push rod (7) is connected to the crossbeam through the connecting plate. The center distance between the two horizontal sections of the U-shaped connecting pipe (4) is consistent with the center distance between the two crossbeams (2).

8. An active energy-dissipating debris flow grid dam according to claim 2 or 3, characterized in that: The baffle (10) is an annular steel plate, welded to the middle of the horizontal section inside the U-shaped connecting pipe (4).

9. An active energy-dissipating debris flow grid dam according to claim 4, characterized in that: The air valve (11) is located at the bend outside the U-shaped connecting pipe (4).

10. A construction method for an active energy-dissipating debris flow grid dam as described in claim 4, characterized in that, The construction steps include the following: (1) Determine the vertical spacing of the crossbeam (2) according to the design requirements, and prefabricate the U-shaped connector (3) so that the distance between the centers of the two horizontal sections of the U-shaped connector (4) is consistent with the spacing of the crossbeam (2); (2) Insert the columns (1) into the site of the dam according to the design spacing and fill them in. Weld the U-shaped connector (3) to the column (1) and connect the crossbeam (2) to the back end of the push rod (7) with bolts. (3) Open the air valve (11), pump air into the U-shaped connecting pipe (4) through the air cylinder, control the air (8) to fill so that when compressing one push rod (7), the front end of the other push rod (7) push plate (6) is in close contact with the baffle (10), and then close the air valve (11); adjust the crossbeam (2) so that it is on the same vertical line.

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