CN-117286831-B - Active energy-consumption type debris flow grid dam and construction method thereof

CN117286831BCN 117286831 BCN117286831 BCN 117286831BCN-117286831-B

Abstract

The invention discloses an active energy-consumption type debris flow grid dam and a construction method thereof, wherein the grid dam comprises upright posts, cross beams and U-shaped communicating vessels, the upright posts and the cross beams are connected through the U-shaped communicating vessels to form a protection system with reliable and stable structure, the U-shaped communicating vessels comprise U-shaped communicating pipes, two sealing plates, two pushing rods, air, water absorbing materials, two baffles and air valves, the U-shaped communicating pipes connect an upper layer of cross beam and a lower layer of cross beam, the cross beams transmit force to the other pushing rod and the cross beam through compressed air of one pushing rod, the purpose that debris flow consumes debris flow is achieved, the structural system does not consume energy per se, the cross section size of structural members is greatly reduced, the cost is saved, the force transmission of the U-shaped communicating vessels is definite, the active energy consumption of debris flow is achieved, the integral shock resistance of the structure is improved, and the safety and reliability of the structure are ensured.

Inventors

WANG CHANGMING
LV BAOHONG
ZHANG ZEFANG
ZHANG MINGMIN
WU DI
LIU HAILIANG
LIU XIAOYANG

Assignees

吉林大学

Dates

Publication Date: 20260505
Application Date: 20231010

Claims (10)

1. An active energy-consumption debris flow grille dam is characterized by comprising upright posts (1), cross beams (2) and U-shaped communicating vessels (3); A plurality of upright posts (1) are arranged at equal intervals, a plurality of U-shaped communicating vessels (3) which are vertically arranged are fixed on each upright post (1) from top to bottom, each cross beam (2) is fixedly connected with one end of the U-shaped communicating vessel (3) which is positioned at the same height, and a plurality of cross beams (2) are connected with the upright posts (1) through the U-shaped communicating vessels (3) to form a grid structure together; The U-shaped communicating vessel (3) comprises a U-shaped communicating pipe (4), two sealing plates (5) are welded at pipe orifices at two ends of the U-shaped communicating pipe (4) respectively, two pushing plates (6) are arranged in the U-shaped communicating pipe (4) and can move back and forth and form a sealing structure with the inner wall of the U-shaped communicating pipe (4), two pushing rods (7) penetrate through the sealing plates (5) at one ends respectively and are fixedly connected with the pushing plates (6), the rear ends of the pushing rods (7) are connected with the cross beams (2) respectively, and an air valve (11) is communicated with the U-shaped communicating pipe (4) and is used for supplementing air to a sealing area in the middle of the two pushing plates (6).
2. The active energy-consumption debris flow grille dam according to claim 1, wherein the baffle (10) is welded in the U-shaped communicating pipe (4) and is positioned between the sealing plate (5) and the pushing plate (6), water absorbing materials (9) are filled between the baffle (10) and the sealing plate (5), and the front end of the pushing rod (7) sequentially penetrates through the sealing plate (5), the water absorbing materials (9) and the baffle (10) and then is fixedly connected with the pushing plate (6).
3. The active energy consumption type debris flow grid dam according to claim 2, wherein the upright posts (1) are C-shaped channel steel, each U-shaped communicating vessel (3) is fixed on a C-shaped channel steel web, and the width of the flange of each C-shaped channel steel is larger than the outer diameter of each U-shaped communicating vessel (4).
4. The active energy consumption type debris flow grille dam according to claim 1,2 or 3, wherein the U-shaped communicating pipe (4) is circular in cross section, the annular sealing plate (5) is embedded into the U-shaped communicating pipe (4) for fixation, and the inner ring is embedded with a low friction coefficient material.
5. The active energy-consumption debris flow grille dam of claim 4, wherein the pushing plate (6) is a rubber plate.
6. An active energy-dissipating debris flow dam according to claim 2 or 3, wherein said water absorbing material (9) is a lightweight water absorbing swelling material.
7. The active energy consumption type debris flow grid dam according to claim 4, wherein the U-shaped communicating pipe (4) consists of two horizontal sections and a 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 communicating pipe (4), a connecting plate is welded at the rear end of the push rod (7), the rear end of the push rod (7) is connected with the cross beams through the connecting plate, and the distance between the centers of the two horizontal sections of the U-shaped communicating pipe (4) is consistent with the center distance between the two cross beams (2).
8. The active energy-consumption debris flow dam according to claim 2 or 3, wherein the baffle (10) is an annular steel plate welded at the middle part of the inner horizontal section of the U-shaped communicating pipe (4).
9. An active energy-dissipating debris flow dam according to claim 4, wherein said air valve (11) is located at a curve outside the U-shaped communication tube (4).
10. A method of constructing an active energy-dissipating debris flow dam of claim 4, comprising the steps of: Determining the vertical distance between the cross beams (2) according to design requirements, and prefabricating the U-shaped communicating vessel (3) to enable the circle center distance between two horizontal sections of the U-shaped communicating vessel (4) to be consistent with the distance between the cross beams (2); (2) Inserting the upright posts (1) into the site of the dam site according to the designed space and burying, welding the U-shaped communicating vessel (3) with the upright posts (1), and connecting the cross beam (2) with the rear end of the push rod (7) through bolts; (3) The air valve (11) is opened, the air is inflated into the U-shaped communicating pipe (4) through the inflator pump, the air (8) is controlled to be inflated, when one push rod (7) is compressed, the push plate (6) at the front end of the other push rod (7) is tightly contacted with the baffle (10), then the air valve (11) is closed, and the cross beam (2) is adjusted to be positioned on the same vertical line.

Description

Active energy-consumption type debris flow grid dam and construction method thereof Technical Field The invention relates to the field of debris flow prevention and control engineering, in particular to an active energy-consumption debris flow grid dam and a construction method thereof. Background The mud-rock flow grid dam is characterized by combining the blocking and the discharging, achieves the water-soil separation effect, and avoids the impact damage of massive stones on the downstream. The traditional control structure is designed to improve the shock resistance of the control structure from the perspective of enhancing the strength and rigidity of the control structure or changing the space shape of the control structure, and the structure is always in a passive stress state, belongs to a hard-resistance energy dissipation mode, and can cause the problems of large cross section size, high cost and the like of structural members. For this reason, the scholars have proposed various novel structures based on the concept of "flexible performance" that can improve the structural stress performance, increase the overall impact resistance of the structure, and reduce the cross-sectional dimensions of the structural members. However, the structure still needs structural material deformation to consume the debris flow, belongs to passive energy consumption, and cannot be damaged under the condition of multiple impacts of the debris flow. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide the active energy-consumption type debris flow grid dam and the construction method thereof, wherein the active energy-consumption type debris flow grid dam has strong impact resistance, simple structural system and safe and reliable structure. The invention is realized by the following technical scheme: An active energy-consumption type debris flow grille dam comprises upright posts, cross beams and U-shaped communicating vessels; the plurality of upright posts are arranged at equal intervals, a plurality of U-shaped communicating vessels which are vertically arranged are fixed on each upright post from top to bottom, each cross beam is fixedly connected with one end of the U-shaped communicating vessel positioned at the same height, and the plurality of cross beams are connected with the plurality of upright posts through the U-shaped communicating vessels to form a grid structure together; The U-shaped communicating vessel comprises a U-shaped communicating pipe, two sealing plates are welded at pipe orifices at two ends of the U-shaped communicating pipe respectively, two pushing plates are arranged in the U-shaped communicating pipe and can move back and forth and form a sealing structure with the inner wall of the U-shaped communicating pipe, two pushing rods respectively penetrate through the sealing plates at one end to be fixedly connected with the pushing plates, the rear ends of the pushing rods are respectively connected with a cross beam, and an air valve is communicated with the U-shaped communicating pipe and is used for supplementing air to a sealing area between the two pushing plates. Further, the baffle is welded between the sealing plate and the push plate in the U-shaped communicating pipe, water absorbing material is filled between the baffle and the sealing plate, and the front end of the push rod sequentially penetrates through the sealing plate, the water absorbing material and the baffle and then is fixedly connected with the push plate. Further, the stand column is C-shaped groove steel, each U-shaped communicating vessel is fixed on a web plate of the C-shaped groove steel, and the width of a flange of the C-shaped groove steel is larger than the outer diameter of the U-shaped communicating vessel. Further, the U-shaped communicating pipe is circular in cross section, the annular sealing plate is embedded into the U-shaped communicating pipe for fixation, and the inner ring is embedded with a low friction coefficient material. Further, the push plate is a rubber plate. Further, the water-absorbing material is a light water-absorbing expansion material. Further, the U-shaped communicating pipe comprises two horizontal sections and a 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 communicating pipe, the rear end of the push rod is welded with a connecting plate, the rear end of the push rod is connected with the cross beam through the connecting plate, and the center distance between the two horizontal sections of the U-shaped communicating pipe is consistent with the center distance between the two cross beams. Further, the baffle is an annular steel plate and is welded in the middle of the horizontal section inside the U-shaped communicating pipe. Further, the air valve is positioned at the curve outside the U-shaped communicating pipe.