Precast wall type damper plugging structure and construction method thereof

Abstract

The invention relates to a prefabricated wall type damper plugging structure and a construction method thereof, the plugging structure comprises two steel frameworks on the back side and the front side of a metal damper, and a ceiling keel is fixed at the lower end of an upper cantilever wall; the vertical keels are divided into a left keel bundle and a right keel bundle, and metal dampers are arranged in the interval between the two sets of vertical keels. The ground keel is used for connecting the lower ends of the vertical keels of the left keel bundle and the right keel bundle; a reserved interval is arranged at the upper ends of the ground keel and the lower cantilever wall and filled with cement mortar. The construction method comprises the steps that firstly, a steel framework is manufactured, cement mortar is smeared at the top end of a lower cantilever wall according to the reserved interval height, then the steel framework is installed between an upper cantilever and a lower cantilever, the upper end of the steel framework is fixedly connected with an upper cantilever wall, and the lower end of the steel framework falls on the top face of the cement mortar; transverse keels are mounted on the steel framework on the back side of the metal damper to reinforce the frame body, and an access door area is reserved on the steel framework on the front side; rock wool is filled in the space of the steel skeleton, panel and surface layer construction is carried out, and finally an access door is installed.

Description

Technical Field

[0001] The invention belongs to the exterior construction technology of energy dissipation and shock absorption structure, and specifically relates to a prefabricated wall damper sealing structure and a construction method thereof. Background Art

[0002] With the development of the construction industry, energy dissipation and shock absorption technology is increasingly being used in super high-rise and large public construction projects. The structural system using energy dissipation and shock absorption technology has higher safety, economy and technical rationality. Among them, the metal composite damper (MHD) is a new type of seismic damper with a simple structure, easy material acquisition and good performance. It can be used in wind and earthquake resistance of high-rise structures.

[0003] The following problems were encountered during the construction process when using metal composite dampers: ① This type of damper has reset capability, and a flexible connection is required between the upper and lower cantilever walls, and an inspection port is set, which makes construction difficult and quality control difficult. ② Due to the flexible connection between the upper and lower cantilever walls, the damper has a greater impact on the connection structure when it is working, and it is difficult to rework and repair after damage, which increases costs. ③ Traditional plugging methods require that all plugging be removed and restored if the metal composite damper needs to be replaced, which is complicated and wastes materials. ④ On-site processing, production, and installation are low in construction efficiency and slow in construction speed. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a prefabricated wall damper blocking structure and a construction method thereof, so as to improve the construction efficiency and ensure the construction quality.

[0005] The present invention solves the above-mentioned problem by adopting the following technical solution: A prefabricated wall damper blocking structure is arranged between an upper cantilever wall and a lower cantilever wall, and includes two steel frames; the two steel frames are symmetrically arranged on the back and front of the metal damper, and the steel frames are composed of a top keel, a vertical keel and a ground keel. The top keel is fixed to the lower end of the upper cantilever wall and is the same length as the upper cantilever wall; the vertical keels are divided into two groups, a left keel bundle and a right keel bundle, each group has several keels, which are respectively fixed at the two ends of the lower side of the top keel; a metal damper is arranged in the interval between the left keel bundle and the right keel bundle; there are two ground keels, which are respectively used to connect the lower ends of the vertical keels of the left keel bundle and the right keel bundle; a reserved interval is arranged between the ground keel and the upper end of the lower cantilever wall, and the reserved interval is filled with cement mortar.

[0006] Compared with the prior art, the present invention adopting the above structure has the following beneficial effects: The upper and lower cantilevers are supported by a steel frame, which can be prefabricated and installed as a whole, making construction easy. By reserving a gap between the steel frame and the cantilever wall, a stress weak point is set. After long-term vibration stress, cracks will appear at the designated gap position, which can effectively control the location of building wear and tear, avoid damage to the entire wall or damage to uncontrollable locations, and facilitate later repairs.

[0007] As a preferred embodiment, a further technical solution of the above structure is: At least a transverse keel is arranged on the steel frame on the back side of the metal damper. The transverse keel is divided into an upper transverse keel and a lower transverse keel. The two ends of the upper transverse keel are connected to the inner sides of the left keel bundle and the right keel bundle, and the two ends of the lower transverse keel are connected to the ground keel.

[0008] The beneficial effect obtained by the above-mentioned features is that the overall performance of the prefabricated frame can be enhanced by adding the transverse keel.

[0009] The steel frame on the front of the metal damper is provided with an inspection door, and the shaft end of the inspection door is connected to the vertical keel.

[0010] The beneficial effect obtained by the above-mentioned features is that the metal damper can be easily repaired during the building maintenance period through the inspection door.

[0011] The present invention also provides a construction method for the above-mentioned prefabricated wall damper blocking device, and the specific steps are as follows: The first step is to cut the top keel according to the width of the upper cantilever wall; cut the vertical keel according to the distance between the upper cantilever wall and the lower cantilever wall, and the size of the reserved interval designed; cut the ground keel according to the length of the metal damper; The second step is to use nails to fix the top keel, vertical keel and ground keel to form a steel frame; The third step is to apply cement mortar on the top of the lower cantilever wall according to the reserved intervals and wait for the cement mortar to harden; Step 4: Set one steel frame on the back of the metal damper and the other on the front of the metal damper. Consider the thickness of the outer wall plate and the surface layer, position and level the steel frame. Use expansion bolts to reinforce the keel with the upper cantilever wall. The bolt spacing is no more than 500mm. The lower end of the steel frame is in contact with the top surface of the cement mortar. Step 5: Arrange two horizontal keels on the back steel frame. The upper horizontal keel is fixed to the vertical keel, and the lower horizontal keel is fixed to the ground keel. Reserve the inspection door area and fill the empty space of the steel frame with rock wool. The sixth step is to construct panels and surface layers in other areas except the inspection door area, and finally install the inspection door.

[0012] Compared with the prior art, the present invention using the above method has the following beneficial effects: 1) The skeleton can be processed centrally and installed as a whole after processing, which is convenient for construction, improves efficiency, saves labor and reduces costs. 2) The construction quality is easy to control. 3) The steel skeleton works with the cantilever wall through the cement mortar layer. Under long-term action, only some cracks will appear in the horizontal direction of the lower mouth of the device, avoiding overall damage, which does not affect the appearance and is convenient for later repairs, saving costs. 4) If the damper needs to be replaced, the overall dismantling and installation of the prefabricated skeleton can be completed by expansion bolts, and it can also be used in rotation, ensuring convenient construction while strengthening material turnover and reducing costs.

[0013] Optionally, the top keel, the ground keel and the vertical keel are made of 75×40, 0.6mm thick U-shaped steel, and the transverse keel is made of 50×32, 0.5mm thick U-shaped steel.

[0014] Optionally, the reserved spacing height on the lower side of the floor keel is 20 mm.

[0015] Optionally, the installation of the inspection door is as follows: 1) prepare a door leaf with a height that is suitable for the ceiling purlin and the floor purlin; 2) install hinges on the axial side of the door leaf, and fix the other end of the hinge to the square steel tube; 3) embed the square steel tube in the vertical purlin close to the damper; 4) install an adjustment layer between the back side of the square steel tube and the vertical purlin, and use the thickness of the adjustment layer to support the inspection door to be flush with the outer side of the cantilever wall; 5) Use nails to penetrate the vertical purlin, the adjustment layer and the square steel tube for fixing.

[0016] Optionally, the installation of the inspection door is as follows: 1) Design two horizontal purlins on the front steel frame, and prepare inspection door leaves that match the spacing between the two horizontal purlins; 2) Install hinges and square steel tubes on the axial side of the door leaf; 3) Embed the square steel tube between the two horizontal purlins, and install an adjustment layer between the square steel tube and the vertical purlins; 4) Fix the vertical purlins, adjustment layer, horizontal purlins and square steel tubes by nailing them through. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front structural schematic diagram of the cantilever wall support frame arrangement of the present invention; Figure 2 It is a schematic diagram of the side structure of the cantilever wall support frame arrangement of the present invention; Figure 3 It is a schematic diagram of the back steel skeleton structure of the present invention; Figure 4 It is the side structure of the back steel skeleton of the present invention; Figure 5 This is a structural diagram of point A of the back steel skeleton of the present invention; Figure 6 This is a front steel skeleton structure diagram of the present invention; Figure 7 This is a three-dimensional diagram of the back structure of the front steel frame of the present invention; Figure 8It is the structural diagram of point B of the front steel skeleton of the present invention.

[0018] Explanation of the accompanying reference numerals: 1. Upper cantilever wall; 2. Lower cantilever wall; 3. Metal damper; 4. Steel frame; 41. Back steel frame; 42. Front steel frame; 401. Top purlin; 402. Vertical purlin; 403. Ground purlin; 5. Cement mortar; 6. Horizontal purlin; 7. Inspection door; 8. Hinge; 9. Square steel pipe; 10. Adjustment layer; 11. Panel. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0020] The design concept of the present invention is as follows: a metal frame is used to support the interval between the upper cantilever wall 1 and the lower cantilever wall 2 around the metal damper 3, a space is reserved between the bottom of the steel frame 4 and the lower cantilever wall, and mortar is added to the wall to form a weakly connected and easily dislocated sliding structure between the bottom of the steel frame 4 and the top of the lower cantilever wall 2. The frame is designed to be made of U-shaped keels. In the embodiment of this scheme, for a wall thickness of 200mm, two materials are used: model one is 75×40, 0.6mm thick U-shaped steel, and model two is 50×32, 0.5mm thick U-shaped steel. The keel specifications and models can be selected according to the actual situation on site.

[0021] Specifically, the present invention provides a prefabricated wall damper blocking structure, which is arranged between an upper cantilever wall 1 and a lower cantilever wall 2, and includes two steel frames 4; the two steel frames 4 are symmetrically arranged on the back and front sides of a metal damper 3, and the steel frames 4 are composed of a top keel 401, a vertical keel 402 and a ground keel 403. A keel 401 is fixed to the lower end of the upper cantilever wall 1 and is the same length as the upper cantilever wall 1; The vertical keels 402 are divided into two groups, a left keel bundle and a right keel bundle, each group has a plurality of keels, which are respectively fixed at the two ends of the lower side of the keel 401; a metal damper 3 is provided in the gap between the left keel bundle and the right keel bundle; There are two ground keels 403, which are respectively used to connect the lower ends of the vertical keels 402 of the left keel bundle and the right keel bundle; a reserved space is set between the ground keel 403 and the upper end of the lower cantilever wall 2, and the reserved space is filled with cement mortar 5.

[0022] Specifically, at least a transverse keel 6 is arranged on the steel frame 4 on the back side of the metal damper 3, and the transverse keel 6 is divided into an upper transverse keel 6 and a lower transverse keel 6. The two ends of the upper transverse keel 6 are connected to the inner side of the left keel bundle and the right keel bundle, and the two ends of the lower transverse keel 6 are connected to the ground keel 403.

[0023] Optionally, the front steel frame 42 of the metal damper 3 is provided with an inspection door 7 , and the axial end of the inspection door 7 is connected to the vertical keel 402 .

[0024] The construction method of the above-mentioned prefabricated wall damper blocking structure is described in detail below in conjunction with specific embodiments: In the first step, the top keel 401, vertical keel 402 and ground keel 403 are made of model 1 75×40, 0.6mm thick U-shaped steel, and the horizontal keel 6 is made of model 2 50×32, 0.5mm U-shaped steel; the ground keel 403 and the top keel 401 are made of model 1 because their size will not collide with the metal damper 3. If different types of wall dampers are encountered, the keel size can be adjusted. The horizontal keel 6 model 2 is mainly due to the small size of the metal damper 3 and the outer structure of the wall. For this reason, a smaller keel is selected to prevent the horizontal keel 6 from colliding with the metal damper 3. At the same time, the overall performance of the prefabricated skeleton can be enhanced by adding the horizontal keel 6. The top keel 401 is cut according to the width of the upper cantilever wall 1; the vertical keel 402 is cut according to the distance between the upper cantilever wall 1 and the lower cantilever wall 2, and the size of the reserved interval designed, and the ground keel 403 is cut according to the length of the metal damper 3.

[0025] In the second step, the top keel 401, the vertical keel 402 and the ground keel 403 are fixed with nails to form a steel frame 4.

[0026] The third step is to apply cement mortar 5 on the top of the lower cantilever wall 2 according to the reserved interval and wait for the cement mortar 5 to harden; in this embodiment, the reserved interval is designed to be 20 mm.

[0027] The fourth step is to set one side of the steel frame 4 on the back side of the metal damper 3, and set the other side of the steel frame 4 on the front side of the metal damper 3. Considering the thickness of the outer layer of the wall and the surface layer, the steel frame 4 is positioned and leveled. The keel 401 is reinforced with the upper cantilever wall 1 using expansion bolts. The bolt spacing is not more than 500mm, and the lower end of the steel frame 4 is in contact with the top surface of the cement mortar 5.

[0028] The fifth step is to arrange two transverse keels 6 on the back steel frame 41, the upper transverse keel 6 is fixed to the vertical keel 402, and the lower transverse keel 6 is fixed to the ground keel 403, reserve an area for the inspection door 7 on the front steel frame 42, and fill the empty space of the steel frame 4 with rock wool.

[0029] The sixth step is to construct the panel 11 and the surface layer in other parts except the inspection door 7 area, and finally install the inspection door 7.

[0030] Specifically, the installation of the inspection door 7 is as follows: An implementation example of a larger inspection door 7: 1) prepare a door leaf with a height that is adapted to the ceiling keel 401 and the floor keel 403; 2) install a hinge 8 on the axial side of the door leaf, and fix the other end of the hinge 8 to a square steel tube 9; 3) embed the square steel tube 9 in the vertical keel 402 close to the damper; 4) install an adjustment layer 10 in the gap between the back side of the square steel tube 9 and the vertical keel 402, and use the thickness of the adjustment layer 10 to support the inspection door 7 to be flush with the outer side of the cantilever wall; 5) Use nails to penetrate the vertical keel 402, the adjustment layer 10 and the square steel tube 9 for fixing.

[0031] Implementation example of a smaller inspection door 7: 1) Design two transverse purlins 6 on the front steel frame 42, and prepare inspection door 7 leaves that match the spacing between the two transverse purlins 6; 2) Install hinges 8 and square steel tubes 9 on the axial side of the door leaf; 3) Install the square steel tube 9 between the two transverse purlins 6, and install the adjustment layer 10 between the square steel tube 9 and the vertical purlin 402; 4) Fix the vertical purlin 402, the adjustment layer 10, the transverse purlin 6 and the square steel tube 9 by nailing through them.

[0032] The adjustment layer 10 needs to be designed separately, and materials such as gypsum boards and gaskets of corresponding thickness are selected. The thickness of the adjustment layer 10 and the type of the hinge 8 are used to ensure that the outer surface of the inspection door 7 is in the same plane with the surface layers of other areas after completion, and to ensure vertical flatness.

[0033] The role of the 5 layers of cement mortar in the reserved intervals is: on the one hand, to level the parts with individual size deviations; on the other hand, to install the steel frame 4 on the cement mortar 5 but not to connect it with bolts, so that when the damper acts, the frame can slide with the upper cantilever wall to reduce damage to the frame.

[0034] Rock wool mainly plays a protective and sound-insulating role.

[0035] The beneficial effects of the present invention are as follows: 1) The skeleton can be processed centrally and installed as a whole after the processing is completed, which is convenient for construction, improves efficiency, saves labor and reduces costs. 2) The construction quality is easy to control. 3) The skeleton works together with the cantilever wall through the cement mortar layer. Under long-term action, only some cracks appear in the horizontal direction of the lower mouth of the device to avoid overall damage, which does not affect the appearance and is convenient for later repairs, saving costs. 4) If the damper needs to be replaced, the overall dismantling and installation of the prefabricated skeleton can be completed by expansion bolts, and it can also be used in a turnover manner, ensuring convenient construction while strengthening material turnover and reducing costs.

[0036] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A prefabricated wall damper blocking structure, arranged between an upper cantilever wall (1) and a lower cantilever wall (2), characterized in that: The invention comprises two steel frames (4); the two steel frames (4) are symmetrically arranged on the back and front sides of the metal damper (3); the steel frames (4) are composed of a top keel (401), a vertical keel (402) and a ground keel (403); A keel (401) is fixed to the lower end of the upper cantilever wall (1) and is the same length as the upper cantilever wall (1); The vertical keels (402) are divided into two groups, a left keel bundle and a right keel bundle, each group has a plurality of keels, which are respectively fixed to the two ends of the lower side of the keel (401); a metal damper (3) is arranged in the gap between the left keel bundle and the right keel bundle; The ground keels (403) have two ends, which are respectively used to connect the lower ends of the vertical keels (402) of the left keel bundle and the right keel bundle; a reserved space is set between the ground keel (403) and the upper end of the lower cantilever wall (2), and the reserved space is filled with cement mortar (5).

2. The prefabricated wall damper blocking structure according to claim 1, characterized in that: A transverse keel (6) is provided on the steel frame (4) on the back side of at least the metal damper (3), and the transverse keel (6) is divided into an upper transverse keel (6) and a lower transverse keel (6), the two ends of the upper transverse keel (6) are connected to the inner sides of the left keel bundle and the right keel bundle, and the two ends of the lower transverse keel (6) are connected to the ground keel (403).

3. The prefabricated wall damper blocking structure according to claim 1 or 2, characterized in that: The steel frame (4) on the front side of the metal damper (3) is provided with an inspection door (7), and the shaft end of the inspection door (7) is connected to the vertical keel (402).

4. The construction method of the prefabricated wall damper plugging device according to claim 1, characterized in that: Follow these steps: The first step is to cut the top keel (401) according to the width of the upper cantilever wall (1); cut the vertical keel (402) according to the distance between the upper cantilever wall (1) and the lower cantilever wall (2) and the size of the reserved interval designed, and cut the ground keel (403) according to the length of the metal damper (3); The second step is to fix the top keel (401), the vertical keel (402) and the ground keel (403) with nails to form a steel frame (4); Step 3: Apply cement mortar (5) on the top of the lower cantilever wall (2) according to the reserved interval and wait for the cement mortar (5) to harden; Step 4: Take one side of the steel frame (4) and set it on the back side of the metal damper (3), take the other side of the steel frame (4) and set it on the front side of the metal damper (3), comprehensively consider the thickness of the outer layer of the wall plate and the surface layer method, position and level the steel frame (4), use expansion bolts to reinforce the keel (401) with the upper cantilever wall (1), the bolt spacing is not more than 500mm, and the lower end of the steel frame (4) is abutted against the top surface of the cement mortar (5); Step 5: Arrange two transverse keels (6) on the back steel frame (4), fix the upper transverse keel (6) to the vertical keel (402), and fix the lower transverse keel (6) to the ground keel (403), reserve an area for the inspection door (7), and fill the space of the steel frame (4) with rock wool; In the sixth step, the panel (11) and the surface layer are constructed at other parts except the inspection door (7) area, and finally the inspection door (7) is installed.

5. The construction method of the prefabricated wall damper plugging device according to claim 4 is characterized in that: The top keel (401), the ground keel (403) and the vertical keel (402) are made of 75×40, 0.6 mm thick U-shaped steel, and the horizontal keel (6) is made of 50×32, 0.5 mm thick U-shaped steel.

6. The construction method of the prefabricated wall damper plugging device according to claim 4, characterized in that: The reserved interval height at the lower side of the floor keel (403) is 20 mm.

7. The construction method of the prefabricated wall damper plugging device according to claim 4, characterized in that: The installation of the inspection door (7) is specifically as follows: 1) preparing a door leaf with a height that is adapted to the ceiling keel (401) and the floor keel (403); 2) installing a hinge (8) on the axial side of the door leaf, and fixing the other end of the hinge (8) to a square steel tube (9); 3) embedding the square steel tube (9) in a vertical keel (402) close to the damper; 4) inserting an adjustment layer (10) between the back side of the square steel tube (9) and the vertical keel (402), and using the thickness of the adjustment layer (10) to support the inspection door (7) flush with the outer side of the cantilever wall; 5) using nails to penetrate the vertical keel (402), the adjustment layer (10) and the square steel tube (9) for fixing.

8. The construction method of the prefabricated wall damper plugging device according to claim 4, characterized in that: The installation of the inspection door (7) is specifically as follows: 1) designing two transverse purlins (6) on the front steel frame (4) and preparing the inspection door (7) leaf that matches the spacing between the two transverse purlins (6); 2) installing hinges (8) and square steel tubes (9) on the axial side of the door leaf; 3) embedding the square steel tube (9) between the two transverse purlins (6) and installing an adjustment layer (10) between the square steel tube (9) and the vertical purlin (402); 4) fixing the vertical purlin (402), the adjustment layer (10), the transverse purlin (6) and the square steel tube (9) by nailing through them.

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