A kind of external multi-stage energy dissipation debris flow blocking unit for existing building

Abstract

The application discloses a kind of for existing building's outer attached multi-stage energy dissipation debris flow blocking unit for disaster face of existing building, and it relates to geological disaster protection engineering technical field.The application includes sequentially arranged first-stage buffer blocking wall, energy dissipation guide groove and second-stage buffer blocking wall along the flow direction of debris flow, and the first-stage buffer blocking wall is composed of ground anchoring outer attached frame and flexible buffer net, and the energy dissipation guide groove is alternately arranged with blocking shunt and backflow piece, forming a Tesla valve energy dissipation area;The second-stage buffer blocking wall is provided with a water storage chamber and a piston type damping buffer structure, which is matched with a replaceable counterweight and a drain valve, and can adaptively adjust the buffer damping parameters.The application adopts external modular design, without large-scale reconstruction of the main body of existing building, and is convenient for construction and operation and maintenance, and through three-stage energy dissipation system, the impact load of debris flow is greatly weakened, the building wall is effectively prevented from being damaged, and the protection reliability and universality can be adapted to different grades of debris flow disaster conditions.

Description

Technical Field

[0001] This invention relates to the field of geological disaster prevention engineering technology, specifically to an externally attached multi-stage energy dissipation debris flow interception unit for existing buildings. Background Technology

[0002] Mountainous areas have complex geological conditions, and heavy rainfall can easily trigger gully-type and slope-type debris flows. Existing buildings are located close to slopes or gullies, with their exterior walls directly exposed to the debris flow's impact path, resulting in significant disaster risk. Currently, debris flow protection measures for buildings mainly fall into two categories:

[0003] The first category is rigid retaining structures, such as masonry retaining walls and concrete retaining dams. The impact resistance of rigid structures relies on their own strength. The huge dynamic load of debris flow is directly transmitted to the foundation and adjacent buildings, which can easily cause wall cracking and foundation slippage. At the same time, rigid retaining walls cannot buffer the impact of boulders. Under the impact of large boulders, local collapse is likely to occur, and maintenance is difficult.

[0004] The second type is flexible protective netting. Flexible netting can intercept large-diameter stones, but it has obvious shortcomings: simple flexible netting can only "block stones" and cannot dissipate the kinetic energy of mudflow slurry. High-speed mud and debris continue to penetrate the netting and impact the building walls.

[0005] In addition, traditional protective structures mostly require large-scale excavation and large-area foundation construction. When modifying existing buildings, it is often necessary to destroy the original ground and wall structure, resulting in high construction costs and significant disruption to residents' daily lives. Conventional protective structures have fixed damping parameters, which cannot be adjusted according to the regional debris flow dynamic characteristics, making it difficult to adapt to debris flow conditions with different impact levels.

[0006] Therefore, existing technologies need to be improved. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an externally attached multi-stage energy dissipation debris flow interception unit for the disaster-facing side of existing buildings. This unit solves technical problems such as difficulties in construction of debris flow protection and renovation of existing buildings, limited energy dissipation methods in protective structures, unadjustable loads, susceptibility to blockage, and direct impact loads acting on the building's exterior walls. By dissipating the impact kinetic energy of debris flows step by step through a multi-stage energy dissipation approach, it achieves pre-blockage of boulders, fluid vortex energy dissipation, and rear-end hydraulic damping buffering, thereby minimizing the impact load transmitted to the building walls.

[0008] This invention is achieved through the following technical solution:

[0009] This invention provides an externally attached multi-stage energy dissipation debris flow barrier unit for existing buildings, comprising a primary buffer barrier wall, an energy dissipation guide channel, and a secondary buffer barrier wall arranged sequentially along a predetermined debris flow direction. The secondary buffer barrier wall is fixedly connected to the exterior wall of the existing building and the ground.

[0010] The primary buffer barrier wall includes an external frame fixed to the ground. The external frame is equipped with a flexible buffer net, and the flexible buffer net and the external frame are connected by an energy-dissipating support. The flexible buffer net is used to prevent large stones from entering the energy-dissipating guide channel and causing blockages.

[0011] The energy dissipation guide channel is equipped with a number of blocking and diverting components and return components. The energy dissipation guide channel with the blocking and diverting components forms a Tesla valve energy dissipation area.

[0012] The secondary buffer barrier wall includes a movable baffle that connects to the energy dissipation guide channel. The secondary buffer barrier wall is equipped with a damping buffer element, and the movable baffle is connected to the damping buffer element.

[0013] Furthermore, in this invention, an arc-shaped bend flow channel is formed between the outer wall of the aforementioned blocking and diverting component and the side wall of the return component, and a plurality of the blocking and diverting components and the return component are arranged alternately in the forward and reverse directions along the flow direction of the energy dissipation guide channel.

[0014] Furthermore, in this invention, the aforementioned external frame includes a base plate anchored to the bottom surface, and triangular side plates are provided on both sides of the base plate, forming a drainage channel between the triangular side plates on both sides, and the flexible buffer net is connected to the triangular side plates.

[0015] Furthermore, in this invention, the energy-consuming bracket mentioned above includes a sleeve, a telescopic connecting rod, and a return spring. The telescopic connecting rod is slidably inserted into the inside of the sleeve, and the return spring is sleeved inside the sleeve with its two ends connected to the inner wall of the sleeve and the end of the telescopic connecting rod, respectively.

[0016] Furthermore, in this invention, the secondary buffer barrier wall described above is provided with a water storage chamber inside, the damping buffer is configured as a piston cylinder, the secondary buffer barrier wall is provided with a through hole that connects to the piston cylinder so that the piston cylinder and the water storage chamber are connected, a first piston is provided inside the piston cylinder, the first piston is connected to a push rod, and the push rod is connected to the movable baffle.

[0017] Furthermore, in this invention, a second piston is provided at the top of the aforementioned water storage chamber, and a counterweight is provided at the top of the second piston.

[0018] Furthermore, in this invention, the aforementioned movable baffle is provided with a reinforcing rod connected to the push rod.

[0019] Furthermore, in this invention, the aforementioned counterweight configuration has multiple weight specifications, which can be replaced and adapted to different debris flow impact loads.

[0020] Furthermore, in this invention, a drain valve is provided on the side wall of the water storage chamber near the bottom.

[0021] Furthermore, in this invention, the bottom of the energy dissipation guide channel is covered with a wear-resistant and impact-resistant liner, the blocking and diverting component is rotatably connected to the energy dissipation guide channel, and the blocking and diverting component is fixed after being rotated and adjusted to the correct position.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] The three-stage energy dissipation reduces impact loads: The flexible buffer net of the primary buffer barrier wall, in conjunction with the energy dissipation support, intercepts large boulders and absorbs initial energy, preventing large-diameter boulders from entering the energy dissipation guide channel and avoiding blockage and failure of the guide channel; mudflow slurry and fine debris enter the energy dissipation area of ​​the energy dissipation guide channel Tesla valve, and the fluid continuously turns and forms eddies under the constraint of the alternately arranged blocking and diverting components and return components, and the fluid kinetic energy is continuously dissipated; the remaining kinetic energy is absorbed by the hydraulic damping structure of the secondary buffer barrier wall. The superposition of multiple energy dissipation mechanisms significantly reduces the final impact force acting on the existing building wall.

[0024] External structure adaptable to existing buildings: The entire device is an external independent unit, with the main load borne by the ground anchor foundation. The secondary buffer retaining wall is simply connected to the building's exterior wall. There is no need for large-scale demolition and rebar installation of the original building foundation and walls. The construction period is short, making it suitable for adding disaster protection to existing buildings.

[0025] Adjustable damping parameters: The two-stage buffer system adopts a water storage chamber and piston hydraulic damping structure. Different specifications of counterweights can be replaced to adjust the buffer start threshold. In conjunction with the discharge valve, the fluid discharge rate can be controlled to achieve damping characteristic adjustment, which can match various disaster conditions such as small slope debris flow and medium-sized gully debris flow. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of an externally attached multi-stage energy dissipation debris flow barrier unit for existing buildings, according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the energy dissipation guide channel according to an embodiment of the present invention;

[0029] Figure 3This is a schematic diagram of a primary buffer barrier wall according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of a secondary buffer barrier wall according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the installation of the energy-consuming bracket according to an embodiment of the present invention.

[0032] The attached diagram shows the markings and corresponding component names: 1- Primary buffer barrier wall; 101- External frame; 1011- Base plate; 1012- Triangular side plate; 102- Flexible buffer net; 2- Secondary buffer barrier wall; 201- Movable baffle; 202- Water storage chamber; 203- Second piston; 3- Energy dissipation guide channel; 301- Blocking and diverting component; 302- Return component; 303- Tesla valve energy dissipation area; 4- Energy dissipation bracket; 5- Damping buffer component; 501- First piston; 502- Push rod; 6- Counterweight; 7- Drain valve; 8- Reinforcing rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for explanation only and are not intended to limit the invention. The following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0034] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Example 1

[0036] like Figure 1As shown, an externally attached multi-stage energy-dissipating debris flow barrier unit for the disaster-facing side of existing buildings is arranged sequentially from front to back along the debris flow direction: a primary buffer barrier wall 1, an energy-dissipating guide channel 3, and a secondary buffer barrier wall 2. The secondary buffer barrier wall 2 is arranged close to the disaster-facing exterior wall of the existing building, with chemical anchors used to connect the side of the wall to the building's exterior wall, and the bottom anchored to the ground outside the building; the entire unit is independently anchored to the ground, and the building wall does not bear most of the impact load.

[0037] Combination Figure 1 and Figure 4 As shown, the primary buffer retaining wall 1 includes an external frame 101 and a flexible buffer net 102. The external frame 101 is welded from steel and includes a base plate 1011 and triangular side plates 1012 symmetrically arranged on both sides of the base plate 1011. The base plate 1011 is anchored to the ground soil or hardened ground by anchor bolts. The triangular side plates 1012 are distributed on both sides, forming a drainage channel in the middle to ensure that the debris flow smoothly converges to the energy dissipation guide channel 3 behind.

[0038] The flexible buffer net 102 is made of high-strength steel wire rope flexible protective net. The mesh size is designed to intercept large boulders with a diameter ≥40cm, while allowing mud and fine debris to pass through the net and flow backward. Combined with... Figure 5 As shown, multiple sets of energy-dissipating supports 4 are evenly arranged between the flexible buffer net 102 and the triangular side plates 1012 on both sides. The energy-dissipating support 4 consists of a sleeve, a telescopic connecting rod, and a return spring; one end of the sleeve is fixed to the triangular side plate 1012, and the end of the telescopic connecting rod is hinged to the flexible buffer net 102; the telescopic connecting rod is slidably installed inside the sleeve, and the return spring is pre-compressed and installed in the inner cavity of the sleeve, with the two ends of the spring pressing against the bottom end of the sleeve and the tail end of the telescopic connecting rod, respectively.

[0039] When a boulder impacts the flexible buffer net 102, the net moves backward, pushing the telescopic link to compress the reset spring. The spring's elastic deformation absorbs the kinetic energy of the boulder impact. After the impact load dissipates, the reset spring drives the telescopic link to perform a certain degree of reset, and the flexible buffer net 102 tries to return to its initial shape.

[0040] Combination Figure 1 and Figure 2 As shown, the energy dissipation guide channel 3 adopts a reinforced concrete or welded steel channel structure, with the front end connected to the diversion channel of the primary buffer barrier wall 1 and the rear end connected to the movable baffle 201 of the secondary buffer barrier wall 2.

[0041] Several obstruction and diversion components 301 and return components 302 are fixedly installed at intervals within the energy dissipation guide channel 3. These components are arranged alternately in the forward and reverse directions along the fluid flow direction. A continuous arc-shaped bend is formed between the outer wall of the obstruction and diversion component 301 and the side wall of the adjacent return component 302, collectively constituting the Tesla valve energy dissipation area 303. Furthermore, the entire bottom of the energy dissipation guide channel 3 is lined with wear-resistant and impact-resistant plates made of high-manganese steel to resist long-term friction and impact wear from sand and gravel in the debris flow, extending the service life of the channel. A rotation center shaft passes through and is fixed to the obstruction and diversion component 301 and the energy dissipation guide channel 3. The obstruction and diversion component 301 can rotate around the rotation center shaft to adjust its diversion. After the obstruction and diversion component 301 is rotated and adjusted, it is fixed to the energy dissipation guide channel 3 with angle iron. The angle iron is removed when further adjustment is needed.

[0042] Combination Figure 1 and Figure 3 As shown, the secondary buffer barrier wall 2 is a closed box-type steel structure component, with a water storage chamber 202 set inside the box; a through hole is opened on the side of the box facing the energy dissipation guide channel 3. A movable baffle 201 that can move back and forth is installed on the side of the box facing the energy dissipation guide channel 3; multiple reinforcing rods 8 are welded to the back of the movable baffle 201, and the reinforcing rods 8 are rigidly connected to the push rod 502 after being gathered together.

[0043] Furthermore, in combination Figure 3 As shown, the damping buffer 5 adopts a horizontally arranged piston cylinder, and the inner cavity of the piston cylinder is connected to the water storage chamber 202 through a through hole in the side wall of the box; the first piston 501 is installed inside the piston cylinder, and one end of the push rod 502 is connected to the first piston 501, and the other end is connected to the reinforcing rod 8. The water storage chamber 202 is pre-filled with clean water (or hydraulic damping oil), and the water can flow freely between the water storage chamber 202 and the piston cylinder.

[0044] Furthermore, a vertically extending installation channel is provided at the top of the water storage chamber 202, through which a second piston 203 is sealed and assembled; a detachable counterweight 6 is placed on the top surface of the second piston 203. The counterweight 6 can be made of stone or concrete blocks, and can be set in various standard specifications such as 5t, 8t, and 10t. It can be selected and replaced according to the impact pressure obtained from the local debris flow survey, or according to the potential scale of debris flows that may be triggered by future rainfall.

[0045] A drain valve 7 is installed near the bottom side wall of the water storage chamber 202; the valve is closed under normal circumstances; after a disaster, the drain valve 7 can be opened to drain the water in the chamber, eliminate the internal water pressure, and facilitate the reset and maintenance of the movable baffle 201 and piston assembly.

[0046] The working principle of the external multi-stage energy dissipation debris flow barrier unit for existing buildings in this embodiment is as follows:

[0047] This debris flow interception unit is located on the upstream side of the existing building facing the debris flow. When rainfall triggers a debris flow to advance downstream, the protection process is divided into three stages:

[0048] Phase 1: Primary Barrier and Initial Energy Absorption

[0049] The debris flow first impacts the primary buffer retaining wall 1. Large boulders inside the debris flow then strike the flexible buffer net 102, transmitting the impact force to the energy-dissipating support 4. The telescopic connecting rod compresses the internal reset spring, relying on the spring's plastic elastic deformation to absorb the impact energy of the boulders. Large boulders are trapped in front of the flexible buffer net 102, preventing them from entering the energy-dissipating guide channel 3 behind it, thus preventing blockage of the guide channel. Fine particles such as mud, sand, and gravel pass smoothly through the net and flow into the energy-dissipating guide channel 3.

[0050] Phase 2: Energy dissipation by eddy currents in the Tesla valve region

[0051] Fine-particle debris flow enters the Tesla valve energy dissipation zone 303 inside the energy dissipation guide channel 3. Constrained by the flow divider 301 and return flow member 302, the fluid continuously changes its flow direction; part of the fluid flows straight forward, while another part deflects back along the curved bend, forming a reverse vortex. The forward fluid and the deflecting vortex continuously collide and mix, converting a large amount of fluid kinetic energy into heat energy and turbulent dissipation. After passing through the Tesla valve energy dissipation zone 303, the debris flow velocity and impact pressure decrease significantly.

[0052] Phase 3: Secondary hydraulic damping buffer, final load attenuation

[0053] After being decelerated by the energy dissipation guide channel 3, the debris flow fluid continues to impact the movable baffle 201; the impact load is transmitted to the first piston 501 through the reinforcing rod 8 and the push rod 502, pushing the first piston 501 to move inward to the piston cylinder, squeezing the water inside the piston cylinder to flow into the water storage chamber 202.

[0054] The water inside the water storage chamber 202 is pressurized and pushes the second piston 203 and the upper counterweight 6 upward. The impact kinetic energy of the debris flow is converted into the gravitational potential energy of the counterweight 6 and the viscous dissipation energy of the water flow, thus achieving impact load buffering.

[0055] When the impact pressure of the debris flow decreases, the counterweight 6 presses down on the second piston 203 by its own weight, and the water in the chamber flows back to push the first piston 501 to reset. The movable baffle 201 gradually returns to its initial position, which has the ability to resist the continuous impact of subsequent debris flows.

[0056] If the estimated impact load of the debris flow in the area is too low, a smaller weight counterweight 6 can be used; in the face of high-intensity debris flow conditions, a larger weight counterweight 6 should be used to increase the buffer activation threshold and prevent large displacement of the movable baffle 201. After the disaster is completely over, the staff will open the drain valve 7 to empty the water in the storage chamber, release the water pressure constraint, and check the flexible buffer net 102, liner, and piston seal for damage. Damaged parts will be replaced or repaired individually.

[0057] In summary, this invention provides an externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing side of existing buildings. Its features include a primary buffer barrier wall 1, an energy dissipation guide channel 3, and a secondary buffer barrier wall 2 arranged sequentially along a predetermined debris flow direction. The secondary buffer barrier wall 2 is fixedly connected to the exterior wall of the existing building and the ground. The primary buffer barrier wall 1 includes an external frame 101 fixed to the ground, and the external frame 101 is provided with a flexible buffer net 102. Communication is established between the flexible buffer net 102 and the external frame 101. The energy dissipation support 4 is connected; the flexible buffer net 102 is used to prevent large stones from entering the energy dissipation guide channel 3 and causing blockage. The energy dissipation guide channel 3 is provided with a number of blocking and diverting components 301 and return components 302. The energy dissipation guide channel 3 with the blocking and diverting components 301 forms a Tesla valve energy dissipation area 303. The secondary buffer barrier wall 2 includes a movable baffle 201 that docks with the energy dissipation guide channel 3. The secondary buffer barrier wall 2 is provided with a damping buffer 5. The movable baffle 201 is connected to the damping buffer 5. An arc-shaped bend flow channel is formed between the outer wall of the blocking and diverting component 301 and the side wall of the return component 302. A number of blocking and diverting components 301 and return components 302 are arranged alternately in the forward and reverse directions along the flow direction of the energy dissipation guide channel 3. The external frame 101 includes a base plate 1011 anchored to the bottom surface. Triangular side plates 1012 are provided on both sides of the base plate 1011, forming a drainage channel between the two sides. The flexible buffer net 102 is connected to the triangular side plates 1012. The energy-dissipating bracket 4 includes a sleeve, a telescopic connecting rod, and a return spring. The telescopic connecting rod is slidably inserted into the sleeve. The return spring is sleeved inside the sleeve, with its two ends connected to the inner wall of the sleeve and the end of the telescopic connecting rod, respectively. The secondary buffer barrier wall 2 has a water storage chamber 202 inside. The damping buffer 5 is configured as a piston cylinder. The secondary buffer barrier wall 2 has a through hole that connects to the piston cylinder, allowing the piston cylinder and the water storage chamber 202 to communicate. A first piston 501 is provided inside the piston cylinder. The first piston 501 is connected to a push rod 502, which is connected to the movable baffle 201. A second piston 203 is installed at the top of the water storage chamber 202, and a counterweight 6 is installed at the top of the second piston 203. The movable baffle 201 is equipped with a reinforcing rod 8 connected to the push rod 502. The counterweight 6 is available in various weight specifications, allowing for interchangeable selection to adapt to different debris flow impact loads. A discharge valve 7 is installed on the side wall of the water storage chamber 202 near the bottom. The bottom of the energy dissipation guide channel 3 is lined with a wear-resistant and impact-resistant liner.The three-stage energy dissipation system significantly reduces the impact load of debris flow, effectively preventing damage to building walls. It is adaptable to different levels of debris flow disaster conditions, with strong protection reliability, versatility and durability. It can be modularly assembled and is suitable for debris flow disaster prevention reinforcement and renovation of various existing buildings in mountainous areas.

[0058] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings, characterized in that, It includes a primary buffer barrier wall (1), an energy dissipation guide channel (3), and a secondary buffer barrier wall (2) arranged sequentially along the predetermined debris flow direction. The secondary buffer barrier wall (2) is fixedly connected to the existing building exterior wall and the ground. The primary buffer barrier wall (1) includes an external frame (101) fixed to the ground. The external frame (101) is equipped with a flexible buffer net (102). The flexible buffer net (102) and the external frame (101) are connected by an energy-dissipating support (4). The flexible buffer net (102) is used to prevent large stones from entering the energy-dissipating guide channel (3) and causing blockage. The energy dissipation guide groove (3) is provided with a number of blocking and diverting components (301) and return components (302), and a Tesla valve energy dissipation area (303) is formed in the groove of the energy dissipation guide groove (3) with the blocking and diverting components (301). The secondary buffer barrier wall (2) includes a movable baffle (201) that docks with the energy dissipation guide groove (3). The secondary buffer barrier wall (2) is provided with a damping buffer (5). The movable baffle (201) is connected to the damping buffer (5).

2. The externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings according to claim 1, characterized in that, An arc-shaped bend flow channel is formed between the outer wall of the blocking diverter (301) and the side wall of the return flow member (302). Several blocking diverters (301) and return flow members (302) are arranged alternately in the forward and reverse directions along the flow direction of the energy dissipation guide channel (3).

3. The externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings according to claim 1, characterized in that, The external frame (101) includes a base plate (1011) anchored to the bottom surface. Triangular side plates (1012) are provided on both sides of the base plate (1011), and a drainage channel is formed between the triangular side plates (1012) on both sides. The flexible buffer net (102) is connected to the triangular side plates (1012).

4. The externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings according to claim 1, characterized in that, The energy-consuming bracket (4) includes a sleeve, a telescopic link and a return spring. The telescopic link is slidably inserted into the inside of the sleeve. The return spring is sleeved inside the sleeve and its two ends are respectively connected to the inner wall of the sleeve and the end of the telescopic link.

5. The externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings according to claim 1, characterized in that, The secondary buffer barrier wall (2) is provided with a water storage chamber (202) inside. The damping buffer (5) is configured as a piston cylinder. The secondary buffer barrier wall (2) is provided with a through hole that connects to the piston cylinder so that the piston cylinder and the water storage chamber (202) are connected. A first piston (501) is provided inside the piston cylinder. The first piston (501) is connected to a push rod (502). The push rod (502) is connected to the movable baffle (201).

6. The externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings according to claim 5, characterized in that, The top of the water storage chamber (202) is provided with a second piston (203), and the top of the second piston (203) is provided with a counterweight (6).

7. The externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings according to claim 5, characterized in that, The movable baffle (201) is provided with a reinforcing rod (8) connected to the push rod (502).

8. The externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings according to claim 6, characterized in that, The counterweight (6) is available in various weight specifications and can be replaced to suit different debris flow impact loads.

9. The externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings according to claim 6, characterized in that, A drain valve (7) is provided on the side wall of the water storage chamber (202) near the bottom.

10. The externally attached multi-stage energy dissipation debris flow barrier unit for the disaster-facing face of existing buildings according to any one of claims 1-9, characterized in that, The bottom of the energy dissipation guide channel (3) is covered with a wear-resistant and impact-resistant liner. The blocking diverter (301) is rotatably connected to the energy dissipation guide channel (3). The blocking diverter (301) is fixed after being rotated and adjusted to the correct position.

Images