A prefabricated shear wall dry connection structure and construction method

Abstract

The invention discloses a prefabricated shear wall dry connection structure and construction method, which relates to the technical field of construction engineering, wherein the upper prefabricated shear wall is provided with a positioning piece, the lower prefabricated shear wall is provided with a matching piece, the embedded block is embedded in the upper prefabricated shear wall, the positioning key, the guide column and the positioning block are exposed outside the upper prefabricated shear wall, the projection of the guide column on the horizontal plane is located inside the projection range of the positioning key and the positioning block on the horizontal plane; the matching piece is provided with a positioning slot, a guide channel is provided below the positioning slot, and a positioning groove is provided in the guide channel; the guide column enters the positioning slot horizontally while making the positioning block enter the guide channel, and when the positioning block moves along the guide channel to the top of the positioning groove, it can move downward to cooperate with the positioning groove, and make the positioning key stuck in the positioning slot; the positioning slot and the guide channel are grout-filled and compacted by high-strength grouting material. The scheme of the invention can greatly improve the stability and bearing capacity of the prefabricated shear wall structure.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to an assembled shear wall dry connection structure and a construction method. Background Art

[0002] With the development of construction engineering technology, residential buildings are mostly frame structures or shear wall structures, while non-load-bearing walls are mostly built with blocks supplemented with cement mortar, which not only consumes a lot of manpower, but also has a long construction period and high construction costs. Manual masonry requires high experience of personnel, and the quality of the building is difficult to guarantee. Lightweight prefabricated building material technology can greatly save labor, shorten construction period, reduce costs, ensure building quality, save energy and resources, and reduce the adverse effects of construction waste on the environment through factory prefabrication and on-site assembly. The development of lightweight prefabricated structural systems is the only way for residential industrialization.

[0003] In lightweight prefabricated structural systems, prefabricated shear wall structures are widely used. In prefabricated shear wall components, the vertical connection of prefabricated shear walls is one of the key technologies, and the vertical connection nodes are usually the structural weaknesses of prefabricated shear walls. The existing vertical connection methods of prefabricated shear walls can be divided into wet connection and dry connection according to the construction method. At present, most prefabricated shear walls use the wet connection method, that is, a certain area is reserved between the two walls as a node. During construction, the node is enclosed by a template, and concrete is poured inward. After the concrete reaches the strength requirement, the template is removed; there are also other wet connection methods, such as sleeve grouting connection, grout anchor connection, sleeve extrusion connection, etc. Most wet connections require on-site wet operations, which have the disadvantages of taking a long time, complex reinforcement in the node, and high cost.

[0004] At present, dry connection methods have also been developed, such as bolt connection, welding, mechanical connection, etc. Although dry connection can avoid the shortcomings of wet connection as much as possible, its integrity is poor, and the deformation and damage of the structure are still concentrated in the connection parts of the prefabricated shear wall. During use, the seismic performance is poor, and its use is restricted in high-intensity areas. Therefore, how to set up the connection structure on the wall of the prefabricated shear wall to ensure the strength requirements of the node, ensure the quality of the connection construction, reduce the difficulty of construction, and shorten the construction period is the key to the dry connection method. Summary of the invention

[0005] The invention provides a prefabricated shear wall dry connection structure and a construction method, so as to solve the technical problems existing in the current prefabricated shear wall dry connection method, that is, the integrity is poor and the structure of the connection part is easy to be deformed and damaged.

[0006] The technical solution adopted by the present invention is:

[0007] A prefabricated shear wall dry connection structure, comprising an upper prefabricated shear wall and a lower prefabricated shear wall, wherein a positioning piece is provided at the bottom of the upper prefabricated shear wall, and a matching piece is provided at the top of the lower prefabricated shear wall; the positioning piece comprises an embedded block, a cross-shaped positioning key, a guide column and a positioning block connected in sequence from top to bottom, the embedded block is embedded in the upper prefabricated shear wall, the positioning key, the guide column and the positioning block are exposed to the outside of the upper prefabricated shear wall, and the projection of the guide column on the horizontal plane is located within the projection range of the positioning key and the positioning block on the horizontal plane; the matching piece is provided with a cross-shaped positioning slot adapted to the positioning key, and the opening of the positioning slot passes through both ends of the matching piece and along the thickness direction of the lower prefabricated shear wall. The length direction runs through the two ends of the matching piece, and a guide channel is provided under the positioning slot, and a positioning groove is provided in the guide channel that is recessed downward and adapted to the positioning block; the guide column enters the positioning slot horizontally and makes the positioning block enter the guide channel. When the positioning block moves along the guide channel to just above the positioning groove, it can move downward to cooperate with the positioning groove and make the positioning key stuck in the positioning slot; after the positioning block cooperates with the positioning groove, the positioning slot and the guide channel are densely grouted with high-strength grouting material, so that high-strength grouting material exists between the positioning key and the positioning block to maintain the positioning piece and the matching piece relatively fixed, thereby realizing the fixed connection between the upper prefabricated shear wall and the lower prefabricated shear wall.

[0008] Preferably, the upper prefabricated shear wall is provided with a plurality of the positioning members at intervals along the length direction, the matching member is provided with a plurality of the positioning slots, a plurality of the guide channels, and a plurality of positioning grooves adapted to the plurality of the positioning members, the plurality of the positioning slots penetrate along the length direction of the matching member, and the plurality of the guide channels penetrate along the length direction of the matching member.

[0009] Preferably, the matching piece is provided with a first through hole which passes through the guide channel from the lower end upward, and the lower prefabricated shear wall is provided with a first preset channel corresponding to the first through hole and extending in the vertical direction, and the assembled shear wall dry connection structure also includes prestressed tendons, and the prestressed tendons pass through the first through hole and the first preset channel to connect the lower prefabricated shear wall with the matching piece, and the first through hole and the first preset channel are densely grouted with high-strength grouting material, and the upper and lower ends of the prestressed tendons are respectively anchored and connected by sleeves, and the bottom wall of the guide channel is provided with a first countersunk hole, and the sleeve connected to the upper end of the prestressed tendon is arranged in the first countersunk hole and the top of the sleeve does not protrude from the first countersunk hole.

[0010] Preferably, the positioning member is provided with a second through hole passing through the upper and lower ends, the upper prefabricated shear wall is provided with a second preset channel corresponding to the second through hole and extending in the vertical direction, the assembled shear wall dry connection structure also includes prestressed tendons, the prestressed tendons pass through the second through hole and the second preset channel to connect the upper prefabricated shear wall with the positioning member, the second through hole and the second preset channel are grouted densely with high-strength grouting material, the upper and lower ends of the prestressed tendons are respectively anchored and connected by sleeves, a second countersunk hole is provided at the bottom of the positioning member, the sleeve connected to the lower end of the prestressed tendon is provided in the second countersunk hole and the bottom of the sleeve does not protrude from the second countersunk hole.

[0011] Preferably, a conical surface is formed in the sleeve, and expansion parts are provided at both ends of the prestressed tendon. The expansion parts are located in the sleeve and abut against the conical surface along the retraction direction of the prestressed tendon.

[0012] Preferably, the positioning block is configured as a disc-shaped structure, the central axis of the positioning block coincides with the central axis of the positioning key, and the positioning groove is located directly below the cross intersection of the positioning slots.

[0013] Preferably, the upper end of the embedded block is connected to a reinforcement structure, which includes a cylindrical portion and a disc portion with a diameter larger than the cylindrical portion, the lower end of the cylindrical portion is connected to the embedded block, and the disc portion is coaxially connected to the upper end of the cylindrical portion.

[0014] Preferably, a rubber pad is provided in the positioning groove, and the positioning block is pressed tightly on the rubber pad when it is in a state of being matched with the positioning groove.

[0015] The present invention provides a method for dry-connecting an assembled shear wall, which is used for the above-mentioned assembled shear wall dry-connecting structure. The method comprises: step 1, preparing positioning parts and matching parts; in the process of preparing the upper prefabricated shear wall, pre-embedding the prepared positioning parts at the bottom of the upper prefabricated shear wall, and connecting the upper prefabricated shear wall and the positioning parts through prestressed tendons; in the process of preparing the lower prefabricated shear wall, pre-embedding the prepared matching parts at the top of the lower prefabricated shear wall, and connecting the lower prefabricated shear wall and the matching parts through prestressed tendons; step 2, in the process of preparing the lower prefabricated shear wall, Erect the lower prefabricated shear wall in advance on the construction site; hoist the upper prefabricated shear wall, and align the guide column with one end opening of the positioning slot, and at the same time align the positioning block with one end opening of the guide channel; drive the upper prefabricated shear wall to move horizontally, so that the guide column moves along the positioning slot, and at the same time the positioning block moves along the guide channel until it is directly above the positioning groove; control the upper prefabricated shear wall to move downward, so that the positioning block cooperates with the positioning groove, and at the same time the positioning key is inserted into the positioning slot; step three, grout the positioning slot and the guide channel densely with high-strength grouting material by high-pressure jet grouting.

[0016] Preferably, the step three specifically includes: S31: temporarily blocking the openings at both ends of the positioning slot and the guide channel along the thickness direction of the lower prefabricated shear wall by two sealing plates; S32: grouting the high-strength grouting material through the openings at one end of the positioning slot and the guide channel along the length direction of the lower prefabricated shear wall by high-pressure jet grouting until the high-strength grouting material overflows from the opening at the other end; S33: removing the two sealing plates to observe whether all the openings of the positioning slot and the guide channel are blocked by the high-strength grouting material; if so, the positioning slot and the guide channel have been densely grouted with the high-strength grouting material.

[0017] Due to the adoption of the above technical solution, the technical effects achieved by the present invention include at least:

[0018] 1. The prefabricated shear wall dry connection structure provided by the present invention, in which the upper prefabricated shear wall and the lower prefabricated shear wall are connected by positioning parts and matching parts, can overcome the shortcomings and defects of the existing wet connection of prefabricated shear walls, realize the dry connection of the upper prefabricated shear wall and the lower prefabricated shear wall, greatly reduce the relatively cumbersome process of traditional wet connection, the construction process is simple and fast, and the cost is low, which is conducive to the standardized processing of wall structures, facilitates industrialized production and green installation construction, and improves the assembly level of building structures.

[0019] 2. During the assembly process, align the guide column with the positioning slot and the positioning block with the guide channel in advance. At this time, the positioning key is located above the mating part. Then move the guide column along the positioning slot and the positioning block along the guide channel. When the positioning block moves along the guide channel to just above the positioning groove, it moves downward to a position that matches the positioning groove. At this time, the positioning key is just inserted into the positioning slot. The cooperation between the positioning block and the positioning groove and the cooperation between the positioning key and the positioning slot form multiple horizontal limiters for the positioning part and the mating part, effectively improving the horizontal shear resistance to prevent horizontal slippage between the upper prefabricated shear wall and the lower prefabricated shear wall, thereby improving the stability and bearing capacity of the assembled shear wall structure.

[0020] 3. The docking installation process of the upper prefabricated shear wall and the lower prefabricated shear wall can be completed by hoisting equipment and translation equipment. After the upper prefabricated shear wall is suspended to a suitable height by the hoisting equipment, the upper prefabricated shear wall is translated by the translation equipment to align the positioning block with the positioning groove up and down. Then, the upper prefabricated shear wall is controlled by the hoisting equipment to move slowly downward until the coordination of the positioning block with the positioning groove and the coordination of the positioning key with the positioning card slot are completed synchronously. The construction is highly convenient and the construction speed is accelerated.

[0021] 4. Since the opening of the positioning slot passes through both ends of the matching piece along the thickness direction of the lower prefabricated shear wall and passes through both ends of the matching piece along the length direction of the lower prefabricated shear wall, the thickness direction and length direction of the lower prefabricated shear wall can be the installation direction of the upper prefabricated shear wall, that is, the upper prefabricated shear wall can be installed by sliding from front to back or from back to front along the thickness direction, and can also be installed by sliding from left to right or from right to left along the length direction, providing a variety of installation direction options, improving the adaptability to different construction site arrangements, and allowing construction personnel to select the best installation direction according to the construction site and arrangement to minimize construction difficulty.

[0022] 5. After the positioning block is matched with the positioning groove and the positioning key is matched with the positioning slot, the positioning slot and the guide channel are grouted with high-strength grouting material. The micro-expansion and high self-compactness of the high-strength grouting material are used to completely grout the space in the positioning slot and the guide channel, and the positioning part and the matching part are bonded to achieve a reliable and tight connection between the positioning part and the matching part. The high-strength grouting material also connects the matching part to the upper prefabricated shear wall through the top opening of the positioning slot, thereby improving the connection stability between the upper prefabricated shear wall and the lower prefabricated shear wall, thereby improving the seismic resistance. Since the projection of the guide column on the horizontal plane is located within the projection range of the positioning key and the positioning block on the horizontal plane, the positioning key, the guide column and the positioning block form a configuration with large ends and a small middle. Therefore, after the positioning slot and the guide channel are densely grouted with high-strength grouting material, the high-strength grouting material between the positioning key and the positioning block wraps and bonds the guide column. Since the high-strength grouting material in the positioning slot and the guide channel will eventually solidify into one, it will form a downward compression limit on the positioning block, thereby ensuring that the positioning block is stably maintained in the positioning groove, and then ensuring that the positioning key is stably maintained in the positioning slot, so that the positioning piece and the matching piece are stably maintained in a relatively fixed state, ensuring that the assembled shear wall structure has good integrity and safety, greatly improving the connection strength of the vertical connection part, and reducing or even eliminating the weak points of the vertical connection. Preferably, the bottom surface of the upper prefabricated shear wall, the top surface of the matching piece, the outer surface of the positioning piece, and the inner surface of the positioning slot and the guide channel can be roughened to improve the bonding strength of the high-strength grouting material with the upper prefabricated shear wall, the positioning piece and the matching piece after solidification.

[0023] 6. The positioning keys of multiple positioning parts match with the multiple positioning slots of the matching parts one by one, and the multiple positioning blocks match with the multiple positioning grooves one by one, so that the upper prefabricated shear wall and the lower prefabricated shear wall form multiple connection matches along the length direction, further improving the connection reliability. Since multiple positioning slots are connected along the length direction of the matching parts, and multiple guide channels are connected along the length direction of the matching parts, after all the positioning parts and matching parts are matched in place, it is only necessary to grout at the opening position on either side of the positioning slots or the guide channels, and the high fluidity of the high-strength grouting material can make the high-strength grouting material flow in all the positioning slots and guide channels, and finally make the positioning slots and guide channels all dense, thereby improving the convenience of grouting. In addition, the high-strength grouting material in all the positioning slots and guide channels will eventually solidify into an integrated structural form. Compared with the dispersed form, the positioning parts, matching parts, upper prefabricated shear wall and lower prefabricated shear wall are connected through the integrated high-strength grouting material solidification structure, which has a better limiting effect on the positioning block and a higher connection strength for all the positioning parts and matching parts, making the connection between the upper prefabricated shear wall and the lower prefabricated shear wall more stable and reliable.

[0024] 7. The matching parts and the lower prefabricated shear wall are connected by prestressed tendons to achieve further reinforcement connection on the basis of pre-embedded fixation, and the positioning parts and the upper prefabricated shear wall are also connected by prestressed tendons to achieve further reinforcement connection on the basis of pre-embedded fixation. Therefore, under severe conditions such as earthquakes, when the upper prefabricated shear wall and the lower prefabricated shear wall are subjected to the tensile force generated by external loads and have the risk of separation from the positioning parts and the matching parts respectively, and the positioning parts and the matching parts are separated, due to the presence of all prestressed tendons, the tensile force generated by the external loads first offsets the existing prestress of the positioning parts and the upper prefabricated shear wall and the existing prestress of the matching parts and the lower prefabricated shear wall, and then as the load increases, the upper prefabricated shear wall and the positioning parts, the lower prefabricated shear wall and the matching parts, and the positioning parts and the matching parts are pulled and then separated, thereby delaying the appearance and development of cracks in the prefabricated shear walls, helping to improve the crack resistance, stiffness and impermeability of the prefabricated shear walls, and giving full play to the performance of the prefabricated shear walls. In addition, since the first through hole passes through the guide channel, after grouting in the guide channel, the high-strength grouting material blocks the first through hole to form a protective layer, thereby isolating the sleeve in the first through hole from the external environment, and the sleeve in the second through hole is closed by the positioning groove, which also isolates the sleeve in the second through hole from the external environment, preventing the components in the external environment from corroding the sleeve, effectively extending the service life of the sleeve, and improving the durability of the sleeve and prestressed tendons. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 An assembly diagram of a prefabricated shear wall dry connection structure provided by an embodiment of the present invention;

[0027] Figure 2 An assembly diagram of an upper prefabricated shear wall and positioning members provided in an embodiment of the present invention;

[0028] Figure 3 A cross-sectional view of an assembly component formed by an upper prefabricated shear wall and a positioning member provided in an embodiment of the present invention;

[0029] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0030] Figure 5 Assembly of the lower prefabricated shear wall, matching parts and rubber pads provided in the embodiment of the present invention Figure 1 ;

[0031] Figure 6 Assembly of the lower prefabricated shear wall, matching parts and rubber pads provided in the embodiment of the present invention Figure 2 ;

[0032] Figure 7 A cross-sectional view of an assembly component formed by a lower prefabricated shear wall, a matching piece and a rubber pad provided in an embodiment of the present invention;

[0033] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0034] Fig. 9 A schematic diagram of the structure of a positioning member provided in an embodiment of the present invention;

[0035] Fig.10 A cross-sectional view of a positioning member provided by an embodiment of the present invention;

[0036] Fig.11 A schematic diagram of the structure of a matching component provided by an embodiment of the present invention;

[0037] Fig.12 A cross-sectional view of a matching piece provided by an embodiment of the present invention;

[0038] Fig.13 A cross-sectional view of an assembly formed by a positioning member, a matching member and a rubber pad provided in an embodiment of the present invention Figure 1 , which shows a state where the positioning block is located in the guide channel and the positioning key is located above the matching piece;

[0039] Fig.14 A cross-sectional view of an assembly formed by a positioning member, a matching member and a rubber pad provided in an embodiment of the present invention Figure 2, which shows the state where the positioning block is located in the positioning groove and the positioning key is inserted into the positioning slot;

[0040] Fig.15 A construction status diagram of the prefabricated shear wall dry connection structure provided in an embodiment of the present invention shows a state in which two sealing plates seal the openings at both ends of the positioning slot and the guide channel along the thickness direction of the lower prefabricated shear wall.

[0041] List of parts and reference numerals:

[0042] 1 upper prefabricated shear wall, 11 second preset channel;

[0043] 2 lower prefabricated shear wall, 21 first preset channel;

[0044] 3 positioning member, 31 embedded block, 32 positioning key, 33 guide column, 34 positioning block, 35 second through hole, 36 second countersunk hole, 37 cylindrical part, 38 disc part;

[0045] 4 matching piece, 41 positioning slot, 42 guide channel, 43 positioning groove, 44 first through hole, 45 first countersunk hole, 46 reinforcement block;

[0046] 5 prestressed tendons, 51 expansion parts;

[0047] 6 sleeve, 61 tapered surface;

[0048] 7. Rubber pad;

[0049] 8 sealing boards. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0051] like Figures 1 to 14As shown, an assembled shear wall dry connection structure provided by the present invention comprises an upper prefabricated shear wall 1 and a lower prefabricated shear wall 2, a positioning piece 3 is provided at the bottom of the upper prefabricated shear wall 1, and a matching piece 4 is provided at the top of the lower prefabricated shear wall 2; the positioning piece 3 comprises an embedded block 31, a cross-shaped positioning key 32, a guide column 33 and a positioning block 34 connected in sequence from top to bottom, the embedded block 31 is embedded in the upper prefabricated shear wall 1, the positioning key 32, the guide column 33 and the positioning block 34 are exposed outside the upper prefabricated shear wall 1, and the projection of the guide column 33 on the horizontal plane is located within the projection range of the positioning key 32 and the positioning block 34 on the horizontal plane; the matching piece 4 is provided with a cross-shaped positioning card groove 41 adapted to the positioning key 32, and the opening of the positioning card groove 41 passes through both ends of the matching piece 4 and the lower prefabricated shear wall 2 in the thickness direction. A guide channel 42 is provided at the bottom of the positioning slot 41, and a positioning groove 43 which is recessed downward and adapted to the positioning block 34 is provided in the guide channel 42; the guide column 33 enters the positioning slot 41 horizontally while allowing the positioning block 34 to enter the guide channel 42; when the positioning block 34 moves along the guide channel 42 to the top of the positioning groove 43, it can move downward to cooperate with the positioning groove 43, and allow the positioning key 32 to be inserted into the positioning slot 41; after the positioning block 34 cooperates with the positioning groove 43, the positioning slot 41 and the guide channel 42 are densely grouted with high-strength grouting material, so that high-strength grouting material exists between the positioning key 32 and the positioning block 34, and the positioning member 3 and the matching member 4 are maintained relatively fixed, thereby realizing a fixed connection between the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2.

[0052] First of all, it should be noted that in the embodiment of the present invention, the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 can be manufactured by prefabrication in a prefabricated factory, and the connection and positioning of the positioning member 3 on the upper prefabricated shear wall 1 and the connection and positioning of the matching member 4 on the lower prefabricated shear wall 2 are completed during the manufacturing process. Then the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 are transported to the construction site for connection. The positioning member 3 and the matching member 4 are preferably steel components to have a higher structural strength. Of course, other suitable components, such as cast parts, etc., can also be selected according to needs.

[0053] The prefabricated shear wall dry connection structure provided by the present invention, in which the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 are connected by the positioning piece 3 and the matching piece 4, can overcome the shortcomings and defects of the existing vertical wet connection of the prefabricated shear wall, realize the dry connection of the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2, greatly reduce the relatively cumbersome process of the traditional wet connection, the construction process is simple and fast, and the cost is low, which is conducive to the standardized processing of the wall structure, facilitates industrialized production and green installation construction, and improves the assembly level of the building structure.

[0054] During the assembly process, the guide column 33 is aligned with the positioning slot 41, and the positioning block 34 is aligned with the guide channel 42. At this time, the positioning key 32 is located above the mating member 4, and then the guide column 33 is moved along the positioning slot 41, and the positioning block 34 is moved along the guide channel 42. Fig.13 The figure shows a state where the guide column 33 is located in the positioning groove 41, the positioning block 34 is located in the guide channel 42, and the positioning key 32 is located above the matching member 4; when the positioning block 34 moves along the guide channel 42 to the position just above the positioning groove 43, it moves downward to the position matching with the positioning groove 43, and at this time, the positioning key 32 is just inserted into the positioning groove 41, as shown in FIG. Fig.14 The figure shows the state where the positioning block 34 cooperates with the positioning groove 43 and the positioning key 32 is inserted into the positioning slot 41. The cooperation between the positioning block 34 and the positioning groove 43 and the cooperation between the positioning key 32 and the positioning slot 41 form multiple horizontal limits for the positioning member 3 and the matching member 4, effectively improving the horizontal shear resistance to prevent horizontal slippage between the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2, thereby improving the stability and bearing capacity of the assembled shear wall structure. Along the thickness direction of the lower prefabricated shear wall 2, the length dimension of the positioning key 32 can be equal to the length dimension of the positioning slot 41, so that after the two are matched, the two ends of the positioning key 32 in the thickness direction are flush with the outer surface of the matching member 4. Of course, in the thickness direction, the length dimension of the positioning key 32 can also be slightly smaller than the length dimension of the positioning slot 41. After assembly, the space vacated at the edge of the positioning slot 41 can be compacted by high-strength grouting material. Preferably, when the positioning block 34 cooperates with the positioning groove 43 , the positioning key 32 can be completely inserted into the positioning groove 41 , so that the upper prefabricated shear wall 1 fits tightly against the top surface of the fitting 4 .

[0055] The docking installation process of the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 can be completed by hoisting equipment and translation equipment. After the upper prefabricated shear wall 1 is suspended to a suitable height by the hoisting equipment, the upper prefabricated shear wall 1 is translated by the translation equipment so that the positioning block 34 and the positioning groove 43 are aligned up and down. Then, the upper prefabricated shear wall 1 is controlled by the hoisting equipment to slowly move downward until the cooperation of the positioning block 34 and the positioning groove 43 and the cooperation of the positioning key 32 and the positioning slot 41 are synchronously completed, which has high construction convenience and accelerates the construction speed.

[0056] Since the opening of the positioning slot 41 passes through both ends of the matching piece 4 along the thickness direction of the lower prefabricated shear wall 2 and passes through both ends of the matching piece 4 along the lower prefabricated shear wall 2, the thickness direction and length direction of the lower prefabricated shear wall 2 can be the installation direction of the upper prefabricated shear wall 1, that is, the upper prefabricated shear wall 1 can be slid and installed from front to back or from back to front along the thickness direction, and can also be slid and installed from left to right or from right to left along the length direction, providing a variety of installation direction options, improving the adaptability to different construction site arrangements, and allowing construction personnel to select the best installation direction according to the construction site and arrangement to minimize the difficulty of construction.

[0057] After the positioning block 34 is matched with the positioning groove 43 and the positioning key 32 is matched with the positioning slot 41, the positioning slot 41 and the guide channel 42 are grouted with high-strength grouting material. The micro-expansion and high self-compactness of the high-strength grouting material are used to completely groute and compact the space within the positioning slot 41 and the guide channel 42, and the positioning piece 3 and the matching piece 4 are bonded to achieve a reliable and tight connection between the positioning piece 3 and the matching piece 4. The high-strength grouting material also connects the matching piece 4 to the upper prefabricated shear wall 1 through the top opening of the positioning slot 41, thereby improving the connection stability between the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2, thereby improving the seismic resistance. Since the projection of the guide column 33 on the horizontal plane is located within the projection range of the positioning key 32 and the positioning block 34 on the horizontal plane, the positioning key 32, the guide column 33 and the positioning block 34 form a configuration with large ends and a small middle. Therefore, after the positioning slot 41 and the guide channel 42 are densely grouted with high-strength grouting material, the high-strength grouting material between the positioning key 32 and the positioning block 34 wraps and bonds the guide column 33. Since the high-strength grouting material in the positioning slot 41 and the guide channel 42 will eventually solidify into one, a downward compression limit is formed on the positioning block 34, thereby ensuring that the positioning block 34 is stably maintained in the positioning groove 43, and then ensuring that the positioning key 32 is stably maintained in the positioning slot 41, so that the positioning member 3 and the matching member 4 are stably maintained in a relatively fixed state, ensuring that the assembled shear wall structure has good integrity and safety, greatly improving the connection strength of the vertical connection parts, and reducing or even eliminating the weak points of the vertical connection. Preferably, the bottom surface of the upper prefabricated shear wall 1, the top surface of the matching piece 4, the outer surface of the positioning piece 3, and the inner surfaces of the positioning slot 41 and the guide channel 42 can all be roughened to enhance the bonding strength of the high-strength grouting material with the upper prefabricated shear wall 1, the positioning piece 3 and the matching piece 4 after solidification.

[0058] In addition, after the matching member 4 is embedded in the top of the lower prefabricated shear wall 2, Figure 1 , Figure 5 , Figure 6 and Figure 7In the embodiment shown, the fitting 4 can cover the entire top surface of the lower prefabricated shear wall 2. In this solution, after the upper prefabricated shear wall 1 is connected to the lower prefabricated shear wall 2, the upper prefabricated shear wall 1 is only in contact with the fitting 4. After the positioning slot 41 and the guide channel 42 are grout-filled with high-strength grouting material, there is no gap between the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2. Of course, the horizontal extension area of ​​the fitting 4 can also be made smaller than the top surface of the lower prefabricated shear wall 2. After the fitting 4 is pre-buried in the top of the lower prefabricated shear wall 2, the fitting 4 does not cover the entire top surface of the lower prefabricated shear wall 2. Then, a grouting gap is formed between the portion of the top surface of the lower prefabricated shear wall 2 that is not covered by the fitting 4 and the upper prefabricated shear wall 1. A grouting layer can be formed in the grouting gap, and the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 are connected through the grouting layer.

[0059] As a preferred embodiment of the present invention, Figure 2 , Figure 3 , Fig.11 and Fig.12 As shown, the upper prefabricated shear wall 1 is provided with a plurality of positioning members 3 at intervals along the length direction, the matching member 4 is provided with a plurality of positioning slots 41, a plurality of guide channels 42, and a plurality of positioning grooves 43 adapted to the plurality of positioning members 3, the plurality of positioning slots 41 penetrates along the length direction of the matching member 4, and the plurality of guide channels 42 penetrates along the length direction of the matching member 4. Figure 1The embodiment in which the upper prefabricated shear wall 1 is provided with three positioning members 3 is schematically illustrated. Of course, it does not limit the present invention. Specifically, a suitable number of positioning members 3 can be selected according to the length of the upper prefabricated shear wall 1 and the requirements for the installation strength of the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2. The positioning keys 32 of the plurality of positioning members 3 are matched one by one with the plurality of positioning slots 41 of the matching member 4, and the plurality of positioning blocks 34 are matched one by one with the plurality of positioning grooves 43, so that the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 form multiple connection matches along the length direction, further improving the connection reliability. Since multiple positioning slots 41 pass through the length direction of the matching piece 4, and multiple guide channels 42 pass through the length direction of the matching piece 4, after all the positioning pieces 3 and the matching pieces 4 are matched in place, it is only necessary to grout at the opening position on either side of the positioning slots 41 or the guide channels 42, and the high fluidity of the high-strength grouting material can make the high-strength grouting material flow in all the positioning slots 41 and the guide channels 42, and finally make the positioning slots 41 and the guide channels 42 all dense, thereby improving the convenience of grouting. In addition, the high-strength grouting material in all the positioning slots 41 and the guide channels 42 will eventually solidify into an integrated structural form. Compared with the dispersed form, the positioning piece 3, the matching piece 4, the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 are connected by the integrated high-strength grouting material solidification structure, which has a better limiting effect on the positioning block 34 and a higher connection strength for all the positioning pieces 3 and the matching pieces 4, making the connection between the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 more stable and reliable.

[0060] As a preferred embodiment of the present invention, Figure 3 , Figure 4 and Fig.10 As shown, the matching piece 4 is provided with a first through hole 44 which passes through the guide channel 42 from the lower end upward, and the lower prefabricated shear wall 2 is provided with a first preset channel 21 which corresponds to the first through hole 44 and extends in the vertical direction. The assembled shear wall dry connection structure also includes a prestressed tendon 5, which passes through the first through hole 44 and the first preset channel 21 to connect the lower prefabricated shear wall 2 with the matching piece 4. The first through hole 44 and the first preset channel 21 are grouted densely with high-strength grouting material, and the upper and lower ends of the prestressed tendon 5 are respectively anchored and connected by sleeves 6. The bottom wall of the guide channel 42 is provided with a first countersunk hole 45, and the sleeve 6 connected to the upper end of the prestressed tendon 5 is arranged in the first countersunk hole 45, and the top of the sleeve 6 does not protrude from the first countersunk hole 45. As another preferred embodiment of the present invention, Figure 7 , Figure 8 and Fig.12As shown, the positioning member 3 is provided with a second through hole 35 passing through the upper and lower ends, the upper prefabricated shear wall 1 is provided with a second preset channel 11 corresponding to the second through hole 35 and extending in the vertical direction, the assembled shear wall dry connection structure also includes prestressed tendons 5, the prestressed tendons 5 pass through the second through hole 35 and the second preset channel 11 to connect the upper prefabricated shear wall 1 with the positioning member 3, the second through hole 35 and the second preset channel 11 are densely grouted by high-strength grouting material, the upper and lower ends of the prestressed tendons 5 are respectively anchored and connected by sleeves 6, and a second countersunk hole 36 is provided at the bottom of the positioning member 3, the sleeve 6 connected to the lower end of the prestressed tendon 5 is provided in the second countersunk hole 36 and the bottom of the sleeve 6 does not protrude from the second countersunk hole 36. The matching piece 4 and the lower prefabricated shear wall 2 are connected by prestressed tendons 5 to achieve further reinforcement connection on the basis of pre-embedded fixation, and the positioning piece 3 and the upper prefabricated shear wall 1 are also connected by prestressed tendons 5 to achieve further reinforcement connection on the basis of pre-embedded fixation. Therefore, under severe conditions such as earthquakes, when the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 are subjected to the tensile force generated by the external load and have the risk of separation from the positioning piece 3 and the matching piece 4 respectively, and the positioning piece 3 and the matching piece 4 are separated, due to the presence of all the prestressed tendons 5, the external The tensile force generated by the load first offsets the existing prestress between the positioning member 3 and the upper prefabricated shear wall 1, as well as the existing prestress between the matching member 4 and the lower prefabricated shear wall 2. Then, as the load increases, the upper prefabricated shear wall 1 and the positioning member 3, the lower prefabricated shear wall 2 and the matching member 4, and the positioning member 3 and the matching member 4 are pulled and then separated, thereby delaying the appearance and development of cracks in the prefabricated shear wall, helping to improve the crack resistance, stiffness and impermeability of the prefabricated shear wall, and giving full play to the performance of the prefabricated shear wall. In addition, since the first through hole 44 passes through the guide channel 42, after grouting in the guide channel 42, the high-strength grouting material blocks the first through hole 44 to form a protective layer, thereby isolating the sleeve 6 in the first through hole 44 from the external environment, and the sleeve 6 in the second through hole 35 is closed by the positioning groove 43, which also isolates the sleeve 6 in the second through hole 35 from the external environment, preventing the components in the external environment from corroding the sleeve 6, effectively extending the service life of the sleeve 6, and improving the durability of the sleeve 6 and the prestressed tendon 5.

[0061] Specifically, the prestressed tendons 5 connect the fittings 4 and the lower prefabricated shear wall 2 and the positioning members 3 and the upper prefabricated shear wall 1 through a post-tensioning process. Taking the prestressed connection between the fittings 4 and the lower prefabricated shear wall 2 as an example, the prestressed tendons 5 can be pre-threaded through the first through hole 44 and the first preset channel 21, and then the prestressed tendons 5 are tensioned at both ends of the prestressed tendons 5 through a tensioning device. After tensioning, the two ends of the prestressed tendons 5 are anchored through the sleeve 6, and finally, the first through hole 44 and the first preset channel 21 are grout-filled with high-strength grouting material to make the prestressed tendons 5 prestress the fittings 4 and the lower prefabricated shear wall 2. Similarly, regarding the prestressed connection between the positioning member 3 and the upper prefabricated shear wall 1, the prestressed tendons 5 can be preliminarily passed through the second through hole 35 and the second preset channel 11, and then the prestressed tendons 5 are tensioned at both ends of the prestressed tendons 5 by tensioning equipment, and the two ends of the prestressed tendons 5 are anchored by the sleeve 6 after tensioning, and finally the second through hole 35 and the second preset channel 11 are grout-filled with high-strength grouting material to make the prestressed tendons 5 prestress the positioning member 3 and the upper prefabricated shear wall 1. Preferably, the matching member 4 can be prestressedly connected to the lower prefabricated shear wall 2 through multiple prestressed tendons 5.

[0062] Regarding the structure of the sleeve 6, in a preferred embodiment, as Figure 4 and Figure 8 As shown, a conical surface 61 is formed in the sleeve 6, and expansion portions 51 are provided at both ends of the prestressed tendon 5. The expansion portion 51 is located in the sleeve 6 and abuts against the conical surface 61 along the retraction direction of the prestressed tendon 5. Then, the conical surface 61 stops and limits the expansion portion 51, thereby fixing the sleeve 6 in the first countersunk hole 45 and the second countersunk hole 36, preventing the prestressed tendon 5 from separating from the sleeve 6.

[0063] As a preferred embodiment of the present invention, Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, the positioning block 34 is set to a disc-shaped structure, the central axis of the positioning block 34 coincides with the central axis of the positioning key 32, and the positioning groove 43 is located directly below the cross intersection of the positioning slot 41, so that the positioning member 3 is a regular structure as a whole, the cross center of the positioning member 3 corresponds to the center of the positioning block 34, and the cross center of the positioning slot 41 corresponds to the center of the positioning groove 43, which helps to simplify the processing technology of the positioning member 3 and the matching member 4, and improve the uniformity of the force of the positioning member 3 under the action of the high-strength grouting material. In addition, the outer surface of the positioning block 34 is a cylindrical surface. When the positioning block 34 is installed toward the guide channel 42, the cylindrical surface can play a role in rounded corners, so that the positioning block 34 can smoothly enter the guide channel 42.

[0064] As a preferred embodiment of the present invention, Figure 3 , Fig. 9 and Fig.10As shown, the upper end of the embedded block 31 is connected to a reinforcing structure, which includes a cylindrical portion 37 and a disc portion 38 having a diameter larger than that of the cylindrical portion 37. The lower end of the cylindrical portion 37 is connected to the embedded block 31, and the disc portion 38 is coaxially connected to the upper end of the cylindrical portion 37. By setting the reinforcing structure, the tensile strength of the positioning member 3 can be improved, thereby improving the relative fixation stability of the positioning member 3 and the upper prefabricated shear wall 1.

[0065] As a preferred embodiment of the present invention, Figure 7 and Fig.12 As shown, a reinforcing block 46 may be provided at the bottom of the fitting 4 to increase the embedded depth of the fitting 4 in the lower prefabricated shear wall 2 and improve the connection reliability between the fitting 4 and the lower prefabricated shear wall 2 .

[0066] As a preferred embodiment of the present invention, Figure 5 , Figure 6 , Figure 7 and Fig.14 As shown, a rubber pad 7 is provided in the positioning groove 43, and the positioning block 34 is pressed on the rubber pad 7 when it is matched with the positioning groove 43. By providing the rubber pad 7 in the positioning groove 43, the positioning block 34 moves downward and is matched with the positioning groove 43, so that the elastic deformation of the rubber pad 7 is used for buffering, and the hard connection between the positioning member 3 and the matching member 4 is avoided, thereby improving the seismic performance and energy dissipation performance of the shear wall structure, and greatly simplifying the complexity of the connection between the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 in the assembled shear wall structure, and improving the assembly fault tolerance. Preferably, the rubber pad 7 can be bonded in the positioning groove 43 to avoid the movement of the rubber pad 7 during the assembly process.

[0067] The present invention provides a prefabricated shear wall dry connection construction method, which is used for the prefabricated shear wall dry connection structure as above, and the construction method comprises:

[0068] Step 1, prepare the positioning piece 3 and the matching piece 4; in the process of preparing the upper prefabricated shear wall 1, the prepared positioning piece 3 is pre-buried at the bottom of the upper prefabricated shear wall 1, and the upper prefabricated shear wall 1 and the positioning piece 3 are connected by the prestressed tendons 5; in the process of preparing the lower prefabricated shear wall 2, the prepared matching piece 4 is pre-buried at the top of the lower prefabricated shear wall 2, and the lower prefabricated shear wall 2 and the matching piece 4 are connected by the prestressed tendons 5; specifically, the positioning piece and the matching piece of the steel component can be prepared in the steel structure processing plant, preferably one side of the upper prefabricated shear wall 1 along the length A plurality of positioning members 3 are embedded in the intervals, and the number of positioning slots, guide channels and positioning grooves provided in the matching members 4 is adapted to the number of positioning members; in the preparation process of the upper prefabricated shear wall 1, the upper prefabricated shear wall 1 and the positioning members 3 are connected with the prestressed tendons 5 by adopting the post-tensioning process; in the preparation process of the lower prefabricated shear wall 2, the lower prefabricated shear wall 2 and the matching members 4 are also connected with the prestressed tendons by adopting the post-tensioning process, and finally the upper prefabricated shear wall 1 with the embedded positioning members 3 and the lower prefabricated shear wall 2 with the embedded matching members 4 are transported to the construction site;

[0069] Step 2: erect the lower prefabricated shear wall 2 in advance at the construction site; hoist the upper prefabricated shear wall 1, and align the guide column 33 with one end opening of the positioning slot 41, and at the same time align the positioning block 34 with one end opening of the guide channel 42; drive the upper prefabricated shear wall 1 to slide horizontally, so that the guide column 33 moves along the positioning slot 41, and at the same time the positioning block 34 moves along the guide channel 42 until it is directly above the positioning groove 43; control the upper prefabricated shear wall 1 to move downward, so that the positioning block 34 cooperates with the positioning groove 43, and at the same time the positioning key 32 is inserted into the positioning slot 41; the prefabricated The lower prefabricated shear wall 2 is erected so that the lower prefabricated shear wall 2 can be pre-installed in place during the construction process. At this time, it is in an erected state, and then the upper prefabricated shear wall 1 can be hoisted by a hoisting device. Preferably, the upper prefabricated shear wall 1 can be placed on a translation device after being hoisted, so that the upper prefabricated shear wall 1 can be driven by the translation device to select a suitable installation direction and be installed in a translation manner. When the positioning block 34 moves along the guide channel 42 until it is located directly above the positioning groove 43, the translation device can be removed and then the upper prefabricated shear wall 1 can be driven downward by the hoisting device until the positioning block 34 is matched with the positioning groove 43.

[0070] Step three, use high-strength grouting material to fill the positioning slot 41 and the guide channel 42 densely by means of high-pressure jet grouting; specifically, high-pressure jet grouting can be achieved by means of high-pressure grouting machines, high-pressure grouting pumps and other equipment. The high-pressure jet grouting method can enable the high-strength grouting material to quickly fill all spaces in the positioning slot 41 and the guide channel 42 densely with grouting. After the positioning slot 41 and the guide channel 42 are filled densely with grouting, the high-strength grouting material can be cured. Finally, if there are other gaps between the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2, they can be pointed out by means of high-strength grouting material.

[0071] Further preferably, step three specifically includes:

[0072] S31: Temporarily block the openings of the positioning slots 41 and the guide channels 42 at both ends of the thickness direction of the lower prefabricated shear wall 2 by two sealing plates; S32: Use high-pressure jet grouting to grout the high-strength grouting material through the openings of the positioning slots 41 and the guide channels 42 at one end of the length direction of the lower prefabricated shear wall 2 until the high-strength grouting material overflows from the opening at the other opposite end; S33: Remove the two sealing plates and observe whether all the openings of the positioning slots 41 and the guide channels 42 are blocked by the high-strength grouting material; if so, the positioning slots 41 and the guide channels 42 have been densely grouted by the high-strength grouting material. It can be understood by those skilled in the art that when the matching component 4 is provided with a plurality of positioning slots 41 and guide channels 42, the positioning slots 41 and the guide channels 42 have the most openings at both ends of the matching component 4 along the thickness direction of the lower prefabricated shear wall 2, and the difficulty of sealing them with high-strength grouting material is the greatest. Therefore, if Fig.15 As shown, the openings at both ends of the positioning slot 41 and the guide channel 42 can be temporarily blocked by the sealing plate 8 in advance, and the openings at both ends of the positioning slot 41 and the guide channel 42 along the length direction of the lower prefabricated shear wall 2 are in an open state, and then grouting is performed at any one end of the openings at both ends. For example, Fig.15 The opening at the X end indicated in the figure is grouted, and the high-strength grouting material flows from this X end along the positioning slot 41 and the guide channel 42 toward the opposite opening at the Y end. During the flow, part of the high-strength grouting material is dispersed along the thickness direction of the lower prefabricated shear wall 2 to block the openings at both ends of the positioning slot 41 and the guide channel 42 along the thickness direction of the lower prefabricated shear wall 2, and due to the presence of the sealing plate 8, the high-strength grouting material will not overflow from the openings at these two ends, effectively improving the tightness of the blocking; when high-strength grouting material overflows from the opening at the Y end, the two sealing plates 8 are removed. At this time, if all the openings of the positioning slot 41 and the guide channel 42 are blocked by the high-strength grouting material, it means that the positioning slot 41 and the guide channel 42 have been densely grouted; if there are some openings that are not blocked by the high-strength grouting material, grouting can continue.

[0073] Anything not described in the present invention can be achieved by adopting or drawing on existing technologies.

[0074] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0075] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for constructing a prefabricated shear wall dry connection, used for a prefabricated shear wall dry connection structure, wherein the prefabricated shear wall dry connection structure comprises an upper prefabricated shear wall and a lower prefabricated shear wall, characterized in that: A positioning piece is provided at the bottom of the upper prefabricated shear wall, and a matching piece is provided at the top of the lower prefabricated shear wall; The positioning member comprises an embedded block, a cross-shaped positioning key, a guide column and a positioning block connected in sequence from top to bottom, the embedded block is embedded in the upper prefabricated shear wall, the positioning key, the guide column and the positioning block are exposed outside the upper prefabricated shear wall, and the projection of the guide column on the horizontal plane is located within the projection range of the positioning key and the positioning block on the horizontal plane; The mating piece is provided with a cross-shaped positioning slot adapted to the positioning key, the opening of the positioning slot passes through both ends of the mating piece along the thickness direction of the lower prefabricated shear wall and passes through both ends of the mating piece along the length direction of the lower prefabricated shear wall, a guide channel is provided below the positioning slot, and a positioning groove is provided in the guide channel that is recessed downward and adapted to the positioning block; The guide column enters the positioning slot horizontally and makes the positioning block enter the guide channel. When the positioning block moves along the guide channel to the top of the positioning groove, it can move downward to cooperate with the positioning groove and make the positioning key snap into the positioning slot. After the positioning block is matched with the positioning groove, the positioning slot and the guide channel are grout-filled with high-strength grouting material, so that high-strength grouting material exists between the positioning key and the positioning block to maintain the relative fixation of the positioning piece and the matching piece, thereby realizing the fixed connection between the upper prefabricated shear wall and the lower prefabricated shear wall; The assembled shear wall dry connection construction method comprises: Step 1: prepare positioning parts and matching parts; in the process of preparing the upper prefabricated shear wall, embed the prepared positioning parts at the bottom of the upper prefabricated shear wall, and connect the upper prefabricated shear wall and the positioning parts through prestressed tendons; in the process of preparing the lower prefabricated shear wall, embed the prepared matching parts at the top of the lower prefabricated shear wall, and connect the lower prefabricated shear wall and the matching parts through prestressed tendons; Step 2: erect the lower prefabricated shear wall in advance at the construction site; hoist the upper prefabricated shear wall, and align the guide column with one end opening of the positioning slot, and align the positioning block with one end opening of the guide channel; drive the upper prefabricated shear wall to move horizontally, so that the guide column moves along the positioning slot, and the positioning block moves along the guide channel until it is directly above the positioning groove; control the upper prefabricated shear wall to move downward, so that the positioning block cooperates with the positioning groove, and the positioning key is inserted into the positioning slot; Step three: Use high-strength grouting material to densely fill the positioning slots and guide channels by means of high-pressure jet grouting.

2. The method for dry connection of prefabricated shear walls according to claim 1, characterized in that: The upper prefabricated shear wall is provided with a plurality of the positioning members at intervals along the length direction, the matching member is provided with a plurality of the positioning slots, a plurality of the guide channels, and a plurality of positioning grooves adapted to the plurality of the positioning members, the plurality of the positioning slots penetrate along the length direction of the matching member, and the plurality of the guide channels penetrate along the length direction of the matching member.

3. The method for dry connection of prefabricated shear walls according to claim 1, characterized in that: The matching piece is provided with a first through hole which passes through the guide channel from the lower end upward, and the lower prefabricated shear wall is provided with a first preset channel corresponding to the first through hole and extending in the vertical direction. The assembled shear wall dry connection structure also includes prestressed tendons, which pass through the first through hole and the first preset channel to connect the lower prefabricated shear wall with the matching piece. The first through hole and the first preset channel are densely grouted with high-strength grouting material, and the upper and lower ends of the prestressed tendons are respectively anchored and connected by sleeves. The bottom wall of the guide channel is provided with a first countersunk hole, and the sleeve connected to the upper end of the prestressed tendon is arranged in the first countersunk hole and the top of the sleeve does not protrude from the first countersunk hole.

4. The method for dry connection construction of assembled shear wall according to claim 1, characterized in that: The positioning member is provided with a second through hole passing through the upper and lower ends, the upper prefabricated shear wall is provided with a second preset channel corresponding to the second through hole and extending in the vertical direction, the assembled shear wall dry connection structure also includes prestressed tendons, the prestressed tendons pass through the second through hole and the second preset channel to connect the upper prefabricated shear wall with the positioning member, the second through hole and the second preset channel are densely grouted with high-strength grouting material, the upper and lower ends of the prestressed tendons are respectively connected by sleeve anchoring, the bottom of the positioning member is provided with a second countersunk hole, the sleeve connected to the lower end of the prestressed tendon is arranged in the second countersunk hole and the bottom of the sleeve does not protrude from the second countersunk hole.

5. The method for dry connection construction of assembled shear wall according to claim 3 or 4, characterized in that: A conical surface is formed in the sleeve, and expansion parts are arranged at both ends of the prestressed tendon. The expansion parts are located in the sleeve and abut against the conical surface along the retraction direction of the prestressed tendon.

6. The method for dry connection construction of assembled shear wall according to claim 1, characterized in that: The positioning block is set as a disc-shaped structure, the central axis of the positioning block coincides with the central axis of the positioning key, and the positioning groove is located directly below the cross intersection of the positioning slots.

7. The method for dry connection construction of assembled shear wall according to claim 1, characterized in that: The upper end of the embedded block is connected to a reinforcement structure, which includes a cylindrical portion and a disc portion with a diameter larger than the cylindrical portion. The lower end of the cylindrical portion is connected to the embedded block, and the disc portion is coaxially connected to the upper end of the cylindrical portion.

8. The method for dry connection construction of assembled shear wall according to claim 1, characterized in that: A rubber pad is arranged in the positioning groove, and the positioning block is pressed tightly on the rubber pad when it is in a state of being matched with the positioning groove.

9. The method for dry connection construction of assembled shear wall according to claim 1, characterized in that: The step three specifically includes: S31: temporarily blocking the openings at both ends of the positioning slot and the guide channel along the thickness direction of the lower prefabricated shear wall by two sealing plates; S32: high-strength grouting material is injected through the positioning slot and the guide channel along the opening at one end of the length direction of the lower prefabricated shear wall by high-pressure jet grouting until high-strength grouting material overflows from the opening at the other end; S33: Remove the two sealing plates and observe whether all the openings of the positioning slots and the guide channels are blocked by the high-strength grouting material; if so, the positioning slots and the guide channels have been densely grouted by the high-strength grouting material.

Images