Anti-seismic device for increasing lateral rigidity of building and using method of anti-seismic device

Abstract

The invention discloses an anti-seismic device for increasing the lateral rigidity of a building and a using method of the anti-seismic device, and belongs to the technical field of building seismic resistance. According to the anti-seismic device for increasing the lateral rigidity of the building and the using method of the anti-seismic device, the anti-seismic device comprises lateral shear walls and further comprises at least two reinforcing plates, a wedge-shaped block is arranged between the two reinforcing plates, and the two reinforcing plates are located between the two lateral shear walls. In order to solve the problem that it is difficult to use building horizontal members and improve the anti-seismic capacity of a building under the condition that the self weight is not increased, two rotatable reinforcing plates are arranged between two lateral shear walls in the building, a hydraulic cylinder drives the reinforcing plates to rotate to be in a horizontal state before an earthquake comes, and at the moment, a room above the reinforcing plates can be normally used; when an earthquake comes, the hydraulic cylinder drives the reinforcing plate to rotate to a vertical state, and the reinforcing plate and the lateral shear wall are combined into a whole, so that the lateral rigidity of a building is improved, and the anti-seismic capacity of the building is improved.

Description

Technical Field

[0001] The invention relates to the technical field of earthquake resistance of buildings, and in particular to an earthquake resistance device for increasing the lateral stiffness of a building and a use method thereof. Background Art

[0002] Super high-rise buildings are more damaged by shear waves than longitudinal waves under the action of earthquakes. However, in existing structural designs, the purpose of earthquake resistance is usually achieved by adding lateral anti-lateral components (such as adding frame columns, shear walls, cylinders and other components) to increase the lateral stiffness of the building. However, such components often have a large dead weight, which increases the earthquake force on the building. At the same time, from the perspective of the building structure, the horizontal components are less effective in resisting earthquakes in the horizontal direction of the building. It is difficult to use the horizontal components of the building and to improve the earthquake resistance of the building without increasing the dead weight. Therefore, the existing needs are not met. In this regard, the present application proposes an earthquake-resistant device for increasing the lateral stiffness of the building and a method for using the device. Summary of the invention

[0003] The purpose of the present invention is to provide an earthquake-resistant device for increasing the lateral stiffness of a building and a method of using the same. A rotatable reinforcement plate is arranged between two lateral shear walls in a building. Before an earthquake occurs, a hydraulic cylinder drives the reinforcement plate to rotate to a horizontal state. At this time, the room above the reinforcement plate can be used normally. When an earthquake occurs, the hydraulic cylinder drives the reinforcement plate to rotate to a vertical state. At this time, the reinforcement plate and the lateral shear wall are combined into a whole, thereby improving the lateral stiffness of the building, and then improving the earthquake resistance of the building, which can solve the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-seismic device for increasing the lateral stiffness of a building, comprising a lateral shear wall and a reinforcing plate, wherein at least two reinforcing plates are provided, a wedge block is provided between the two reinforcing plates, the two reinforcing plates are located between the two lateral shear walls, a through hole is provided inside the reinforcing plate, a rotating shaft is provided on the side of the reinforcing plate, a first receiving groove, a second receiving groove and an embedded column are provided on the side of the lateral shear wall, a hydraulic cylinder is provided inside the first receiving groove, a bidirectional screw rod is provided on one side of the second receiving groove, and a combining rod is provided between the two hydraulic cylinders under the single reinforcing plate.

[0005] Preferably, a slide groove is provided under the reinforcing plate, and a guide column and a slider are provided inside the slide groove. The slider is installed on the guide column, a rotating seat is provided at one end of the hydraulic cylinder, and a lifting rod is provided at the other end of the hydraulic cylinder. The rotating seat is located inside the first receiving groove, the rotating seat is connected to the lateral shear wall axis, and one end of the lifting rod is connected to the slider axis.

[0006] Preferably, sleeves are provided at both ends of the combining rod, the sleeves are fixed on the hydraulic cylinder, a transmission block is provided outside the combining rod, the transmission block is connected to the combining rod shaft, the top of the wedge block is a wide opening, and the bottom of the wedge block is a narrow opening.

[0007] Preferably, the bidirectional screw is connected to the lateral shear wall shaft, a motor is provided at one end of the bidirectional screw, the motor is connected to the bidirectional screw shaft, the motor is fixed on the side of the lateral shear wall, and a first limit block, a second limit block and a positioning block are provided on the outside of the bidirectional screw.

[0008] Preferably, the positioning block is located between the first limit block and the second limit block, the positioning block is connected to the bidirectional screw bearing, the first limit block is connected to the left-handed threaded wall on the bidirectional screw, the second limit block is connected to the right-handed threaded wall on the bidirectional screw, and the first limit block and the second limit block are respectively provided with a first movable block and a second movable block on one side.

[0009] Preferably, the first movable block is connected to the first limit block shaft, the second movable block is connected to the second limit block shaft, the first movable block and the second movable block are respectively provided with a first support rod and a second support rod on one side, the two ends of the first support rod are respectively connected to the first movable block and the transmission block shaft, and the two ends of the second support rod are respectively connected to the second movable block and the transmission block shaft.

[0010] A seismic resistance method for increasing the lateral stiffness of a building is implemented based on a seismic resistance device for increasing the lateral stiffness of a building, and comprises the following steps:

[0011] Step 1: Before an earthquake strikes, the two reinforcement plates are in a horizontal state, and the wedge-shaped block is locked between the two reinforcement plates. When an earthquake strikes, the earthquake warning light inside the building lights up and reminds people to leave the room above the reinforcement plate. At the same time, the human presence sensor determines whether there is a person in the room.

[0012] Step 2: After the human presence sensor determines that there is no one in the room, the hydraulic cylinder starts, and the hydraulic cylinder first controls the jacking rod to extend, so that the two reinforcement plates rotate upward with the rotation axis as the center, thereby loosening the wedge block and falling below the reinforcement plate. Then the hydraulic cylinder controls the jacking rod to be retracted into the inside of the hydraulic cylinder, so that the two reinforcement plates rotate downward with the rotation axis as the center until the jacking rod is completely retracted;

[0013] Step 3: The motor is started, and the motor rotates forward to drive the bidirectional screw to rotate. At this time, the first limit block and the second limit block move toward the two ends of the bidirectional screw respectively, so that the angle between the first support rod and the second support rod becomes larger, thereby driving the hydraulic cylinder to rotate toward the inside of the first receiving groove with the rotating seat as the center, and the reinforcing plate rotates with the hydraulic cylinder;

[0014] Step 4: When the hydraulic cylinder is completely retracted into the first receiving groove, the reinforcing plate is in a vertical state. At this time, the embedded column is inserted into the through hole, so that the reinforcing plate and the lateral shear wall form a whole, which can enhance the lateral stiffness of the building;

[0015] Step 5: After the earthquake is over, the motor starts and reverses, and the first limit block and the second limit block move toward the middle along the bidirectional screw rod at the same time. When the first limit block and the second limit block are in place, that is, the first limit block and the second limit block are in contact with the positioning block, the hydraulic cylinder rotates to the telescopic position;

[0016] Step six, the hydraulic cylinder starts and controls the lifting rod to extend, so that the reinforcement plate rotates to a horizontal state again with the rotating shaft as the center. After the two reinforcement plates are in a horizontal state, the personnel then engage the wedge block between the two reinforcement plates. At this time, the room above the two reinforcement plates can be used normally.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention provides rotatable reinforcement plates on one side of two lateral shear walls in a building. Before an earthquake occurs, a hydraulic cylinder drives the reinforcement plates to rotate to a horizontal state. At this time, one end of one reinforcement plate and one end of the other reinforcement plate are wedged together by a wedge block, so that when the weight above the reinforcement plate presses down on the reinforcement plate, the two reinforcement plates simultaneously squeeze the wedge block, resulting in a tighter connection between the reinforcement plate and the wedge block, thereby ensuring that the reinforcement plate is always in a horizontal state and that the room above the reinforcement plate can be used normally. When an earthquake occurs, the hydraulic cylinder drives the reinforcement plate to rotate to a vertical state. At this time, the reinforcement plate and the lateral shear wall are combined into a whole, thereby improving the lateral stiffness of the building. After the earthquake ends, the motor drives the hydraulic cylinder to rotate to the telescopic position, and the hydraulic cylinder controls the jacking rod to extend, and the reinforcement plate rotates to a horizontal state again, so that the reinforcement plate can be reused and can be converted back and forth between being a room support structure and an auxiliary earthquake-resistant structure in daily life, thereby reducing the earthquake-resistant cost of the building.

[0019] 2. In the present invention, when an earthquake occurs, the hydraulic cylinder first controls the lifting rod to extend so that the reinforcement plate rotates upward. At this time, the wedge block loosens and falls under the reinforcement plate, and then the lifting rod is recovered to the inside of the hydraulic cylinder, and the reinforcement plate rotates downward. After the lifting rod is completely recovered, the motor drives the two-way screw to rotate, and the first limit block and the second limit block move toward the two ends of the two-way screw respectively, so that the angle between the first support rod and the second support rod becomes larger, thereby driving the hydraulic cylinder to rotate toward the inside of the first receiving groove with the rotating seat as the center. After the hydraulic cylinder is completely recovered to the inside of the first receiving groove, the reinforcement plate is in a vertical state, and the embedded column is inserted into the inside of the through hole. The lower part of the reinforcement plate is fixed by the embedded column, and the upper part of the reinforcement plate is fixed by the rotating shaft, so that the reinforcement plate and the lateral shear wall form a whole, which can improve the earthquake resistance of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the local structure of the hydraulic cylinder of the present invention;

[0022] Figure 3 It is a schematic diagram of the local structure of the lateral shear wall of the present invention;

[0023] Figure 4 It is a schematic diagram of the local structure of the bidirectional screw rod of the present invention.

[0024] In the figure: 1. lateral shear wall; 101. embedded column; 102. first receiving groove; 103. second receiving groove; 2. reinforcing plate; 201. rotating shaft; 202. through hole; 203. slide groove; 204. guide column; 205. slider; 3. wedge block; 4. hydraulic cylinder; 401. rotating seat; 402. sleeve; 403. lifting rod; 404. combining rod; 5. bidirectional screw; 501. motor; 502. first limit block; 503. first movable block; 504. first support rod; 505. second limit block; 506. second movable block; 507. second support rod; 508. positioning block; 509. transmission block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In order to solve the problem of difficulty in using horizontal building components and improving the earthquake resistance of buildings without increasing their own weight, please refer to Figure 1-4 , this embodiment provides the following technical solutions:

[0027] A seismic device for increasing the lateral stiffness of a building comprises a lateral shear wall 1 and a reinforcing plate 2, wherein at least two reinforcing plates 2 are provided, a wedge block 3 is provided between the two reinforcing plates 2, the two reinforcing plates 2 are located between the two lateral shear walls 1, a through hole 202 is provided inside the reinforcing plate 2, a rotating shaft 201 is provided on the side of the reinforcing plate 2, a first receiving groove 102, a second receiving groove 103 and an embedded column 101 are provided on the side of the lateral shear wall 1, a hydraulic cylinder 4 is provided inside the first receiving groove 102, a bidirectional screw rod 5 is provided on one side of the second receiving groove 103, and a combining rod 404 is provided between the two hydraulic cylinders 4 below the single reinforcing plate 2.

[0028] A slide groove 203 is arranged below the reinforcing plate 2, and a guide column 204 and a slider 205 are arranged inside the slide groove 203. The slider 205 is installed on the guide column 204. A rotating seat 401 is arranged at one end of the hydraulic cylinder 4, and a lifting rod 403 is arranged at the other end of the hydraulic cylinder 4. The rotating seat 401 is located inside the first receiving groove 102, and the rotating seat 401 is connected to the axis of the lateral shear wall 1. One end of the lifting rod 403 is connected to the axis of the slider 205. Sleeves 402 are arranged at both ends of the combining rod 404, and the sleeve 402 is fixed on the hydraulic cylinder 4. A transmission block 509 is arranged outside the combining rod 404, and the transmission block 509 is connected to the axis of the combining rod 404. The top of the wedge block 3 is a wide mouth, and the bottom of the wedge block 3 is a narrow mouth.

[0029] Specifically, after the hydraulic cylinder 4 drives the reinforcing plate 2 to rotate to a horizontal state, one end of one reinforcing plate 2 and one end of the other reinforcing plate 2 are wedged together by the wedge block 3, so that when the weight above the reinforcing plate 2 presses down the reinforcing plate 2, the two reinforcing plates 2 squeeze the wedge block 3 at the same time, resulting in a tighter connection between the reinforcing plate 2 and the wedge block 3, thereby ensuring that the reinforcing plate 2 is always in a horizontal state and ensuring that the room above the reinforcing plate 2 can be used normally.

[0030] Specifically, the reinforcement plate 2 is in a horizontal state before the earthquake. After the earthquake, the motor 501 drives the hydraulic cylinder 4 to rotate to the telescopic position, and the hydraulic cylinder 4 controls the lifting rod 403 to extend, and the reinforcement plate 2 rotates to the horizontal state again, so that the reinforcement plate 2 can be reused and can be converted back and forth between being used as a room support structure and an auxiliary earthquake-resistant structure in daily life, further reducing the earthquake-resistant cost of the building.

[0031] The bidirectional screw rod 5 is connected to the lateral shear wall 1 axis, a motor 501 is provided at one end of the bidirectional screw rod 5, the motor 501 is connected to the bidirectional screw rod 5 axis, the motor 501 is fixed to the side of the lateral shear wall 1, a first limit block 502, a second limit block 505 and a positioning block 508 are provided on the outside of the bidirectional screw rod 5, the positioning block 508 is located between the first limit block 502 and the second limit block 505, the positioning block 508 is connected to the bearing of the bidirectional screw rod 5, the first limit block 502 is connected to the left-handed thread wall on the bidirectional screw rod 5, and the second limit block 505 is connected to the right-handed thread wall on the bidirectional screw rod 5. A first movable block 503 and a second movable block 506 are respectively arranged on one side of the first limit block 502 and the second limit block 505, the first movable block 503 is axially connected to the first limit block 502, the second movable block 506 is axially connected to the second limit block 505, a first support rod 504 and a second support rod 507 are respectively arranged on one side of the first movable block 503 and the second movable block 506, the two ends of the first support rod 504 are respectively axially connected to the first movable block 503 and the transmission block 509, the two ends of the second support rod 507 are respectively axially connected to the second movable block 506 and the transmission block 509.

[0032] A seismic resistance method for increasing the lateral stiffness of a building is implemented based on a seismic resistance device for increasing the lateral stiffness of a building, and comprises the following steps:

[0033] Step 1: Before an earthquake occurs, the two reinforcing plates 2 are in a horizontal state, and the wedge-shaped block 3 is engaged between the two reinforcing plates 2. When an earthquake occurs, the earthquake warning light inside the building lights up and reminds people to leave the room above the reinforcing plates 2. At the same time, the human presence sensor determines whether there are people inside the room.

[0034] Step 2: After the human presence sensor determines that there is no one in the room, the hydraulic cylinder 4 is started. The hydraulic cylinder 4 first controls the lifting rod 403 to extend, so that the two reinforcing plates 2 rotate upward with the rotating shaft 201 as the center, thereby loosening the wedge block 3 and dropping it below the reinforcing plate 2. Then, the hydraulic cylinder 4 controls the lifting rod 403 to be retracted into the interior of the hydraulic cylinder 4, so that the two reinforcing plates 2 rotate downward with the rotating shaft 201 as the center until the lifting rod 403 is completely retracted.

[0035] Step 3: The motor 501 is started, and the motor 501 rotates forward to drive the bidirectional screw 5 to rotate. At this time, the first limit block 502 and the second limit block 505 move to the two ends of the bidirectional screw 5 respectively, so that the angle between the first support rod 504 and the second support rod 507 becomes larger, thereby driving the hydraulic cylinder 4 to rotate toward the inside of the first receiving groove 102 with the rotating seat 401 as the center, and at the same time, the reinforcing plate 2 rotates with the hydraulic cylinder 4;

[0036] Step 4: When the hydraulic cylinder 4 is completely retracted into the first receiving groove 102, the reinforcing plate 2 is in a vertical state. At this time, the embedded column 101 is inserted into the through hole 202, so that the reinforcing plate 2 and the lateral shear wall 1 form a whole, which can enhance the lateral stiffness of the building;

[0037] Step 5: After the earthquake, the motor 501 starts and reverses, and the first limit block 502 and the second limit block 505 move toward the middle along the bidirectional screw rod 5 at the same time. When the first limit block 502 and the second limit block 505 are in place, that is, the first limit block 502 and the second limit block 505 are in contact with the positioning block 508, the hydraulic cylinder 4 rotates to the telescopic position;

[0038] Step six, the hydraulic cylinder 4 is started, and the hydraulic cylinder 4 controls the lifting rod 403 to extend, so that the reinforcing plate 2 rotates to a horizontal state again with the rotating shaft 201 as the center. After the two reinforcing plates 2 are in a horizontal state, the personnel then engage the wedge block 3 between the two reinforcing plates 2. At this time, the room above the two reinforcing plates 2 can be used normally.

[0039] Working principle: By setting a rotatable reinforcement plate 2 on one side of the two lateral shear walls 1 in the building, before the earthquake comes, the hydraulic cylinder 4 drives the reinforcement plate 2 to rotate to a horizontal state. When the earthquake comes, the hydraulic cylinder 4 drives the reinforcement plate 2 to rotate to a vertical state. At this time, the reinforcement plate 2 and the lateral shear wall 1 are combined into a whole, thereby improving the lateral stiffness of the building. After the earthquake is over, the motor 501 drives the hydraulic cylinder 4 to rotate to the telescopic position, and the hydraulic cylinder 4 controls the jacking rod 403 to extend, and the reinforcement plate 2 rotates to a horizontal state again, so that the reinforcement plate 2 can be reused and can be converted back and forth between being used as a room support structure and an auxiliary earthquake-resistant structure in daily life, thereby reducing the earthquake-resistant cost of the building.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seismic device for increasing the lateral stiffness of a building, comprising a lateral shear wall (1), characterized in that: It also comprises a reinforcing plate (2), wherein at least two reinforcing plates (2) are provided, a wedge block (3) is provided between the two reinforcing plates (2), the two reinforcing plates (2) are located between two lateral shear walls (1), a through hole (202) is provided inside the reinforcing plate (2), a rotating shaft (201) is provided on the side of the reinforcing plate (2), a first receiving groove (102), a second receiving groove (103) and an embedded column (101) are provided on the side of the lateral shear wall (1), a hydraulic cylinder (4) is provided inside the first receiving groove (102), a bidirectional screw rod (5) is provided on one side of the second receiving groove (103), and a coupling rod (404) is provided between the two hydraulic cylinders (4) below the single reinforcing plate (2).

2. The anti-seismic device for increasing the lateral stiffness of a building according to claim 1, characterized in that: A slide groove (203) is arranged below the reinforcing plate (2), a guide column (204) and a slider (205) are arranged inside the slide groove (203), the slider (205) is mounted on the guide column (204), a rotating seat (401) is arranged at one end of the hydraulic cylinder (4), a lifting rod (403) is arranged at the other end of the hydraulic cylinder (4), the rotating seat (401) is located inside the first receiving groove (102), the rotating seat (401) is connected to the axis of the lateral shear wall (1), and one end of the lifting rod (403) is connected to the axis of the slider (205).

3. The anti-seismic device for increasing the lateral stiffness of a building according to claim 1, characterized in that: Both ends of the combining rod (404) are provided with sleeves (402), the sleeves (402) are fixed on the hydraulic cylinder (4), a transmission block (509) is provided outside the combining rod (404), the transmission block (509) is connected to the axis of the combining rod (404), the top of the wedge block (3) is a wide opening, and the bottom of the wedge block (3) is a narrow opening.

4. The anti-seismic device for increasing the lateral stiffness of a building according to claim 1, characterized in that: The bidirectional screw rod (5) is connected to the shaft of the lateral shear wall (1); a motor (501) is arranged at one end of the bidirectional screw rod (5); the motor (501) is connected to the shaft of the bidirectional screw rod (5); the motor (501) is fixed to the side of the lateral shear wall (1); and a first limit block (502), a second limit block (505) and a positioning block (508) are arranged outside the bidirectional screw rod (5).

5. The anti-seismic device for increasing the lateral stiffness of a building according to claim 4, characterized in that: The positioning block (508) is located between the first limiting block (502) and the second limiting block (505); the positioning block (508) is connected to the bearing of the bidirectional screw rod (5); the first limiting block (502) is connected to the left-handed thread wall on the bidirectional screw rod (5); the second limiting block (505) is connected to the right-handed thread wall on the bidirectional screw rod (5); and a first movable block (503) and a second movable block (506) are respectively arranged on one side of the first limiting block (502) and the second limiting block (505).

6. The anti-seismic device for increasing the lateral stiffness of a building according to claim 5, characterized in that: The first movable block (503) is axially connected to the first limit block (502), and the second movable block (506) is axially connected to the second limit block (505). A first support rod (504) and a second support rod (507) are respectively provided on one side of the first movable block (503) and the second movable block (506). The two ends of the first support rod (504) are respectively axially connected to the first movable block (503) and the transmission block (509), and the two ends of the second support rod (507) are respectively axially connected to the second movable block (506) and the transmission block (509).

7. A method for increasing the lateral stiffness of a building, which is implemented based on the device for increasing the lateral stiffness of a building according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Before an earthquake occurs, the two reinforcement plates (2) are both in a horizontal state, and the wedge-shaped block (3) is engaged between the two reinforcement plates (2). When an earthquake occurs, an earthquake warning light inside the building lights up and reminds people to leave the room above the reinforcement plate (2). At the same time, a human presence sensor determines whether there is a person inside the room. Step 2: After the human presence sensor determines that there is no one in the room, the hydraulic cylinder (4) is started. The hydraulic cylinder (4) first controls the lifting rod (403) to extend, so that the two reinforcing plates (2) rotate upward with the rotating shaft (201) as the center, thereby loosening the wedge block (3) and dropping it below the reinforcing plate (2). Then, the hydraulic cylinder (4) controls the lifting rod (403) to be retracted into the interior of the hydraulic cylinder (4), so that the two reinforcing plates (2) rotate downward with the rotating shaft (201) as the center until the lifting rod (403) is completely retracted. Step 3: The motor (501) is started, and the motor (501) rotates forward to drive the bidirectional screw (5) to rotate. At this time, the first limit block (502) and the second limit block (505) move toward the two ends of the bidirectional screw (5) respectively, so that the angle between the first support rod (504) and the second support rod (507) becomes larger, thereby driving the hydraulic cylinder (4) to rotate toward the inside of the first receiving groove (102) with the rotating seat (401) as the center, and at the same time, the reinforcing plate (2) rotates with the hydraulic cylinder (4); Step 4: When the hydraulic cylinder (4) is completely retracted into the first receiving groove (102), the reinforcing plate (2) is in a vertical state. At this time, the embedded column (101) is inserted into the through hole (202), so that the reinforcing plate (2) and the lateral shear wall (1) form a whole, which can enhance the lateral rigidity of the building; Step 5: After the earthquake is over, the motor (501) is started, the motor (501) is reversed, and the first limit block (502) and the second limit block (505) are simultaneously moved toward the middle along the bidirectional screw rod (5). When the first limit block (502) and the second limit block (505) are in place, that is, the first limit block (502) and the second limit block (505) are in contact with the positioning block (508), the hydraulic cylinder (4) rotates to the telescopic position; Step 6: The hydraulic cylinder (4) is started, and the hydraulic cylinder (4) controls the lifting rod (403) to extend, so that the reinforcing plate (2) rotates again to a horizontal state with the rotating shaft (201) as the center. After the two reinforcing plates (2) are both in a horizontal state, the personnel then engage the wedge block (3) between the two reinforcing plates (2). At this time, the room above the two reinforcing plates (2) can be used normally.

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