A fully assembled prefabricated shear wall connection node and construction method thereof

Abstract

The present invention proposes a fully assembled prefabricated shear wall connection node and a construction method thereof, belonging to the technical field of shear walls; the present invention is proposed to solve the problems of great construction difficulty, difficulty in ensuring construction quality, and low construction efficiency in the prior art; the fully assembled prefabricated shear wall connection node includes two groups of shear wall units arranged up and down, the shear wall unit includes a wall body, and bosses are respectively arranged at the upper and lower ends of the wall body, and sleeves are embedded in the bosses; a steel member is arranged between the two groups of shear wall units, which is used to connect the corresponding bosses up and down and to control the center line of the wall body; it also includes locking parts, reinforcement parts and other structures for improving construction speed and quality; secondary pouring concrete is also arranged between the shear wall units. The present invention has a simple structure, low cost, strong shear resistance, and reliable force transmission; it is convenient to construct and operate, easy to position and control, high in precision, and strong in versatility, and can be widely used in assembled shear wall structures.

Description

Technical Field

[0001] The invention relates to the technical field of shear wall units, and in particular to a fully assembled prefabricated shear wall connection node and a construction method thereof. Background Art

[0002] In assembled monolithic concrete structures, the vertical connection performance of precast concrete shear wall units has an important impact on the integrity of the structure. At present, the main form used on construction sites is sleeve grouting connection; sleeve grouting connection technology is a relatively mature and most widely used precast concrete component connection technology. The principle of sleeve grouting connection technology is to insert the steel bar into the butt sleeve, and then use a grouting machine to inject non-shrinkage high-strength grouting material composed of cement, expansion agent, fine aggregate and high-performance admixtures. When the grouting material hardens, the steel bar and the sleeve are firmly connected together, with good tensile and compressive strength.

[0003] However, the sleeve grouting connection technology has the following main disadvantages: 1. Due to the large number of steel bars in the shear wall unit and the high-altitude operation, the precision requirements for on-site construction are extremely high. Inserting more than a dozen or even dozens of steel bars into the steel bar sleeve of the prefabricated reinforced concrete shear wall unit at the same time is like threading a needle by holding a heavy object in the air. The on-site construction requires high installation accuracy of the components, and it is difficult to align the steel bars of the upper and lower shear walls. The on-site construction speed is slow and the construction period is long. 2. The grouting connection is a concealed project and it is difficult to ensure quality. The reliability of the connection is greatly affected by the operating level of the construction personnel. In addition, the quality after grouting is also difficult to detect.

[0004] In view of the above pain points, it is necessary to improve the existing shear wall units. It is necessary to develop a structure and method that is simple to construct, easy for workers to operate, easy to ensure construction quality, and can effectively improve connection stability and construction efficiency. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present invention proposes a fully assembled prefabricated shear wall connection node and a construction method thereof.

[0006] The technical solution of the present invention to solve the technical problem is:

[0007] On the one hand, the present technical solution proposes a fully assembled precast shear wall connection node, which includes two groups of shear wall units arranged up and down. The shear wall unit includes a wall body, in which a steel reinforcement cage is arranged. At the upper and lower ends of the wall body, two groups of spaced bosses are respectively arranged, and sleeves with internal threads are embedded in the bosses. There are also exposed steel bar heads between adjacent bosses, and the steel bar heads are fixedly connected with the steel reinforcement cage. A steel member is arranged between the two groups of shear wall units for connecting the corresponding bosses up and down. The steel member includes two oppositely arranged wing plates, and there are two groups of webs between the wing plates. The webs divide the space between the two wing plates so that clamping cavities are formed at the upper and lower ends of the steel member. The wing plates are threadedly connected with centering bolts for controlling the center line of the wall body. The cross-sectional shapes of the wing plates and the webs are in a ladder-shaped structure. An installation space is formed between the two groups of webs. Jack holes are formed in the webs. The sleeves of the upper and lower adjacent bosses are threadedly connected with threaded rods, and one end of the threaded rod can penetrate through the jack hole and enter the installation space. The threaded rod is threadedly connected with a fastening nut. Secondary cast-in-place concrete is also arranged between the two groups of shear wall units arranged up and down, and the secondary cast-in-place concrete wraps the bosses and the steel member to form an integral structure.

[0008] Preferably, it further includes a locking member for detecting the position of the fastening nut and locking the threaded rod. The locking member includes a "C"-shaped insertion plate, and a pressure-bearing head is fixedly connected to the side wall of the insertion plate. A sliding hole adapted to the insertion plate is formed in the plate wall of the wing plate of the steel member, and one end of the insertion plate can freely penetrate through the sliding hole. If the fastening nut is screwed in place, when the insertion plate is slid along the sliding hole, one end of the insertion plate will not touch the fastening nut. If the fastening nut is not screwed in place, when the insertion plate is slid along the sliding hole, one end of the insertion plate will touch the fastening nut. Depending on the sliding distance of the insertion plate, it can be judged whether the fastening nut is screwed in place. An arc-shaped opening is formed at the end of the insertion plate, and locking threads are provided on the surface of the arc-shaped opening. When the arc-shaped opening is clamped on the surface of the threaded rod, the locking threads can be clamped with the threads自带 by the threaded rod to achieve vertical limit.

[0009] Preferably, it further includes a steel bar mesh. Two sliding sleeves are fixedly connected to the steel bar mesh, and the sliding sleeves can be sleeved on the pressure-bearing heads and slide relative to the pressure-bearing heads. A compression spring is also sleeved on the pressure-bearing head. One end of the compression spring is connected to the insertion plate, and the other end is connected to the steel bar mesh. The sliding sleeves cooperate with the compression spring to control the distance between the steel bar mesh and the formwork.

[0010] Preferably, it further includes lapping steel bars, and both ends of the lapping steel bars are fixedly connected to the steel bar heads.

[0011] Preferably, adjacent steel members are connected with reinforcements, which are in an "X" shape, have positioning columns at the four corners, and a center hole is provided at the center of the reinforcement; the wing plate is provided with positioning holes adapted to be plugged into the positioning columns; the reinforcements located on both sides of the steel members are connected by tension bolts, which connect the steel members and the reinforcements on both sides as a whole.

[0012] Preferably, the head of the centering bolt is fixedly connected to a limiting chuck for positioning the steel mesh.

[0013] On the other hand, the technical solution also proposes a construction method of a fully assembled prefabricated shear wall connection node, based on the fully assembled prefabricated shear wall connection node, comprising the following steps:

[0014] S1: prefabricated shear wall unit;

[0015] S2: transport the prefabricated shear wall units to the construction site;

[0016] S3: Arrange and position the shear wall units at the construction site according to the design requirements;

[0017] S4: Install the shear wall units on the lower floor:

[0018] The sleeve at the top of the shear wall unit is used as a lifting connection point, and the lifting device has a lifting ring that is detachably threaded and matched with the sleeve; the lifting ring is threadedly connected to the threaded sleeve at the top of the shear wall unit to be lifted, and the lifting device is used to lift the shear wall unit located at the lower layer in place on the base; then, the lifting ring is removed, and the threaded rod is threadedly connected to the sleeve;

[0019] S5: Install steel components:

[0020] The steel member is positioned and installed on the boss on the top of the shear wall unit on the lower layer, and the end of the boss is inserted into the corresponding clamping cavity of the steel member; the top end of the installed threaded rod passes through the corresponding insertion hole of the steel member and enters the installation space; the centering bolt corresponding to the boss is adjusted so that the central axis of the steel member is in line with the central axis of the shear wall unit on the lower layer; after adjustment, the fastening nut is screwed on the threaded rod to fix it;

[0021] S6: Installation of shear wall elements on the upper floor:

[0022] Install a threaded rod in the sleeve at the bottom of the shear wall unit in advance; use the hoisting method in S4 to hoist the shear wall unit on the upper layer into place, so that the boss at the bottom of the shear wall unit on the upper layer is correspondingly inserted into the clamping cavity at the top of the steel member; the bottom end of the corresponding threaded rod passes through the corresponding insertion hole and enters the installation space, and then adjust the corresponding centering bolt of the upper shear wall unit so that the central axis of the upper shear wall unit is collinear with the central axis of the steel member and the central axis of the lower shear wall unit; after adjusting in place, screw the fastening nut on the threaded rod to fix it;

[0023] S7: Install the locking element:

[0024] It is assumed that when the arc-shaped opening of the plug plate fits with the threaded rod, the distance between the vertical section of the plug plate or the pressure platform and the wing plate is L1; the worker inserts the locking piece into the sliding hole and slides along the sliding hole until the plug plate cannot move. At this time, the actual distance between the vertical section of the plug plate or the pressure platform and the wing plate is recorded as L2. If the value of L2 is significantly greater than L1, it means that the end of the plug plate touches the fastening nut instead of the threaded rod, which means that the corresponding fastening nut is not screwed in place and does not meet the construction requirements and needs to be re-tightened; if the value of L2 is equal to L1, it means that the end of the plug plate touches the threaded rod instead of the fastening nut, which means that the corresponding fastening nut is screwed in place and meets the construction requirements; depending on the sliding distance of the plug plate, it can be judged whether the fastening nut is screwed in place;

[0025] According to the results of the locking parts inspection, readjust and tighten the unqualified fastening nuts to meet the construction requirements;

[0026] S8: Install overlapping steel bars: Install overlapping steel bars between the steel bar heads corresponding to the upper and lower shear wall units, so that the upper and lower steel bar heads are connected as one;

[0027] S9: Installation template:

[0028] The template is supported and the pressure platform of the locking piece is squeezed inside the template, so that the arc-shaped opening at the end of the locking piece is tightly fitted on the end of the threaded rod, and the locking thread is buckled with the thread of the threaded rod, so as to limit the threaded rod by the locking piece and connect the upper and lower threaded rods;

[0029] S10: Casting:

[0030] Pouring concrete into the formwork to form secondary pouring concrete;

[0031] S11: demoulding.

[0032] Preferably, before step S9, the following steps are also included:

[0033] S8-1: Install the reinforcement. The specific process is: insert the positioning columns at the four corners of the reinforcement into the corresponding positioning holes, then insert the tension bolts into the center hole of the reinforcement, and tighten the tension nuts so that the reinforcements on both sides of the steel structure are tightened and fixed.

[0034] Preferably, before step S9, the following steps are also included:

[0035] S8-2: Install the steel mesh. The specific process is as follows: the connection between the steel mesh and the sliding sleeve is processed in advance in the project; a compression spring is installed on the pressure platform, and then the sliding sleeve is installed on the pressure platform, so that the steel mesh can squeeze the compression spring; in S9, when the template is installed, the inner side of the template will squeeze the sliding sleeve, so that the sliding sleeve and the steel mesh move inward; the installation of the template is used to realize the self-control of the distance between the steel mesh and the template.

[0036] The above technical solution has the following advantages or beneficial effects:

[0037] 1. Compared with the cast-in-place reinforced concrete shear wall structure, most of the components of the present invention are prefabricated in the factory, and then a small amount of necessary concrete is poured after being assembled on site. The factory production efficiency is high, and the manufacturing accuracy and quality can be guaranteed, which is green and environmentally friendly. The prefabricated and assembled shear wall structure with steel components connected up and down in the present invention adopts an open installation method, abandons the traditional concealed installation, cancels the sleeve grouting, reduces the installation accuracy requirements at the construction site, greatly improves the installation efficiency, replaces the sleeve grouting with steel components, saves the project cost, and its upper and lower vertical node connections are more reliable and have better integrity. The nodes and steel components form a whole, which greatly improves the bearing capacity of the shear wall. At the same time, it has obvious multiple earthquake-resistant lines, which makes the building have excellent earthquake resistance.

[0038] 2. The present invention sets a steel component, which can ensure the control of the central axis of the shear wall. The control method of the centering bolt is simple in structure and easy for workers to understand. It can effectively ensure the construction quality and is conducive to controlling the overall flatness and alignment of the upper and lower shear walls. The steel component uses a cavity with a width greater than the boss, which is convenient for the insertion and placement of the boss. It has low precision requirements for on-site construction, reduces the difficulty of installation, and is easy for workers to quickly construct. The installation positioning between the shear wall and the steel component can be achieved by screwing the centering bolt; the boss and the steel component can have a gap, and concrete can enter during subsequent grouting to form an effective connection.

[0039] 3. The locking member provided in the present invention can play two roles. First, it is used to detect whether the fastening nut is screwed in place. By using the sliding distance of the reinforcement, it can be intuitively detected whether the fastening nut is screwed in place. It is easy for workers to understand and can form standardized construction. In addition, if the fastening nut is not screwed in place, the reinforcement cannot be positioned and installed, and the subsequent support formwork and pouring process cannot be carried out. Therefore, the setting of the locking member can force workers to inspect the installation quality, effectively ensuring self-supervision during the entire construction process, and ultimately ensuring the overall quality. This structure is simple in principle, easy to connect, and low in cost. Workers can master it after simple training. Second, it plays the role of binding and locking. The end of the locking member has a locking thread. By using the template to squeeze and support the reinforcement, the upper and lower threaded rods can be limited and tied. It has a high tensile strength, improves the connection strength of the longitudinal shear wall, and has a fast construction speed and improves construction efficiency.

[0040] 4. The reinforcement piece is in an "X" shape as a whole. The steel member and the reinforcement pieces on both sides can be connected as a whole through tension bolts. The connection is reliable and the force is clear. It can well transfer the shear force between the shear wall units and has stronger shear resistance. Combined with the provided steel bar head and lap steel bars, the connection reliability is higher.

[0041] 5. The steel mesh, sliding sleeve and compression spring structure are set up. The steel mesh can enhance the overall strength of the connection and also has good crack resistance. The positioning control of the steel mesh is self-controlled by the sliding sleeve and compression spring, which is simple and convenient and easy to form continuous standardized construction.

[0042] 6. The fully assembled prefabricated shear wall connection node and its construction method provided by the present invention have simple structure, low cost, strong shear resistance and reliable force transmission; the construction operation is convenient, the positioning control is easy, the precision is high and the versatility is strong, and it can be widely used in assembled shear wall structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0044] Figure 1 It is a structural stereogram of a fully assembled prefabricated shear wall unit in the present invention.

[0045] Figure 2 yes Figure 1 Front view of the vertical connection node of the shear wall unit described in (after installation of steel components).

[0046] Figure 3 yes Figure 2 Cross-sectional view of the steel structure from the side.

[0047] Figure 4 It is a construction structure status diagram of the vertical connection node of the shear wall unit.

[0048] Figure 5 It is an enlarged structural diagram of the vertical connection node of the shear wall unit (after the formwork is installed and before grouting construction).

[0049] Figure 6 It is a structural diagram of the connection between the steel mesh and the sliding sleeve (the compression spring is omitted).

[0050] Figure 7 It is a three-dimensional diagram of the locking member structure.

[0051] Figure 8 It is an enlarged structural diagram of the vertical connection node of the shear wall unit in another embodiment (after the template is installed and before grouting construction).

[0052] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure of area A in the middle.

[0053] Fig.10 It is a side view of the connection structure between the steel mesh, sliding sleeve and compression spring.

[0054] Fig.11 This is a front view of the steel component structure in another embodiment.

[0055] Fig.12 It is a structural diagram of the connection between the reinforcement and the steel member.

[0056] Fig.13 yes Fig.12 Rear view of the middle reinforcement structure.

[0057] Description of reference numerals:

[0058] 1. Wall; 101. Steel cage; 2. Boss; 3. Steel head; 31. Overlap steel; 4. Sleeve; 5. Steel member; 51. Wing plate; 52. Web; 511. Centering screw hole; 512. Sliding hole; 521. Insert hole; 513. Positioning hole; 6. Threaded column; 7. Fastening nut; 8. Centering bolt; 81. Limiting chuck; 9. Locking piece; 91. Insert plate; 911. Locking thread; 92. Pressure head; 10. Steel mesh; 1001. Sliding sleeve; 11. Compression spring; 12. Formwork; 13. Reinforcement; 131. Positioning column; 132. Center hole. DETAILED DESCRIPTION

[0059] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0061] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0062] Embodiment 1:

[0063] like Figure 1 - Figure 7As shown, this embodiment proposes a fully assembled prefabricated shear wall connection node, including two groups of shear wall units arranged up and down, the shear wall unit includes a wall body 1, a steel cage 101 is arranged in the wall body 1, and two groups of bosses 2 arranged at intervals are respectively arranged at the upper and lower ends of the wall body 1, and a sleeve 4 with an internal thread is pre-embedded in the boss 2, and the top of the sleeve 4 is flush with the top of the boss 2; an exposed steel bar head 3 is also arranged between adjacent bosses 2, and the steel bar head 3 is fixedly connected to the steel cage 101. The steel bar head 3, the steel cage 101 and the sleeve 4 are processed and welded in advance during prefabrication to form a whole; a steel member 5 is arranged between the two groups of shear wall units for connecting the corresponding upper and lower bosses 2; the steel member 5 includes two oppositely arranged wing plates 51, and two groups of webs 52 are arranged between the wing plates 51, and the webs 52 are arranged at intervals up and down, The web 52 divides the space between the two wing plates 51 so that the upper and lower ends of the steel member 5 form a card cavity, which is used to be clamped on the boss 2; the wing plate 51 is threadedly connected with a centering bolt 8 for controlling the center line of the wall 1, and the wing plate 51 is provided with a centering screw hole 511, in which the centering bolt 8 is adapted to be connected; one end of the centering bolt 8 is pressed against the boss 2 for fine adjustment of the position of the shear wall unit; in order to facilitate the operation of the workers, in this embodiment, when the head of the centering bolt 8 is close to the wing plate 51, the centering bolts 8 on both sides just clamp the boss 2 and realize the centering of the boss 2. The purpose of this setting is to greatly improve the convenience of the workers' operation, and there is no need to use other tools for detection. As long as the centering bolt 8 is screwed into place, the centering adjustment of the boss 2 will be automatically realized, and the control is simple and easy.

[0064] In this embodiment, the cross-sectional shape of the wing plate 51 and the web plate 52 is a ladder-shaped structure; an installation space is formed between the two sets of web plates 52; a plug hole 521 is provided on the web plate 52; the sleeve 4 of the upper and lower adjacent bosses 2 is threadedly connected with a threaded rod 6, and one end of the threaded rod 6 can penetrate the plug hole 521 and enter the installation space. It should be noted that in order to facilitate the installation of the threaded rod 6, in this embodiment, the diameter of the plug hole 521 is set relatively larger than the diameter of the threaded rod 6, which is convenient for insertion. Because there is a centering bolt 8, in this embodiment, the plug hole 521 is no longer used for positioning, but the diameter of the plug hole 521 is made larger, which is convenient for insertion. The centering bolt 8 is used for positioning, which not only ensures the positioning accuracy, but also improves the construction efficiency and reduces the time wasted when aligning the hole. The threaded rod 6 is threadedly connected with a fastening nut 7, and the fastening nut 7 is used to connect and fix the boss 2 to the steel member 5.

[0065] In this embodiment, secondary pouring concrete is provided between the two groups of shear wall units arranged up and down, and the secondary pouring concrete wraps the boss 2 and the steel member 5 to form an integrated structure.

[0066] In this embodiment, the steel member 5 is provided. The steel member 5 can ensure the control of the central axis of the shear wall, and the adopted control method of the centering bolt 8 has a simple structure and is easy for workers to understand. It can effectively ensure the construction quality and is conducive to controlling the overall flatness and alignment of the upper and lower shear walls. In the steel member 5, a clamping cavity with a width greater than that of the convex platform 2 is adopted, which is convenient for the insertion and placement of the convex platform 2, has low requirements for the accuracy of on-site construction, reduces the installation difficulty, is easy for workers to construct quickly, and the installation positioning between the shear wall and the steel member 5 can be realized by screwing the centering bolt 8; there can be a gap between the convex platform 2 and the steel member 5, and when grouting and pouring are carried out subsequently, the concrete can enter to form an effective connection.

[0067] In order to further reduce the installation difficulty and ensure the installation quality, a locking member 9 is also provided in the whole device, which is elaborated in detail below:

[0068] The locking member 9 is used to detect the position of the fastening nut 7 and lock the threaded rod 6, and plays two roles at the same time. The locking member 9 includes a plug plate 91 in a "C" shape, and a bearing head 92 is fixedly connected to the side wall of the plug plate 91. The bearing head 92 can adopt a cylindrical structure; a sliding hole 512 adapted to the plug plate 91 is opened on the plate wall of the wing plate 51 of the steel member 5. One end of the plug plate 91 can freely penetrate through the sliding hole 512 and slide along the sliding hole 512. The structural form of the sliding hole 512 includes but is not limited to being circular, rectangular, square, etc.

[0069] The working principle of the locking member 9 is as follows: If the fastening nut 7 is screwed in place, when the plug plate 91 is slid along the sliding hole 512, one end of the plug plate 91 will not touch the fastening nut 7; if the fastening nut 7 is not screwed in place, when the plug plate 91 is slid along the sliding hole 512, one end of the plug plate 91 will touch the fastening nut 7; depending on the sliding distance of the plug plate 91, it can be judged whether the fastening nut 7 is screwed in place; in this embodiment, it is defined that after the fastening nut 7 is screwed in place, the top surface of the plug plate 91 can slide closely against the bottom surface of the fastening nut 7; if the position of the fastening nut 7 is not in place, the plug plate 91 will touch the outer wall of the fastening nut 7 and cannot move further. In this embodiment, it is defined that when the end of the plug plate 91 is in close contact with the threaded rod 6, the gap between the vertical section of the plug plate 91 and the wing plate 51 is very small. If the plug plate 91 touches the fastening nut 7, then the distance between the vertical section of the plug plate 91 and the wing plate 51 will be relatively large and obvious, and workers can observe it intuitively.

[0070] An arc-shaped opening is provided at the end of the plug plate 91, and locking threads 911 are provided on the surface of the arc-shaped opening. When the arc-shaped opening is clamped on the surface of the threaded rod 6, the locking threads 911 can be engaged with the threads of the threaded rod 6 itself to achieve vertical limit. The two threaded rods 6 arranged up and down can be connected and limited through the plug plate 91, and have good tensile effect, high strength, reliable connection and clear force.

[0071] In this embodiment, overlapping steel bars 31 are also included, and both ends of the overlapping steel bars 31 are fixedly connected to the steel bar heads 3 by binding or welding.

[0072] It can be seen that the locking member 9 provided in the present invention can play two roles. First, it is used to detect whether the fastening nut 7 is screwed in place. By using the sliding distance of the reinforcement member 13, it can be intuitively detected whether the fastening nut 7 is screwed in place. It is easy for workers to understand and can form standardized construction. In addition, if the fastening nut 7 is not screwed in place, the reinforcement member 13 cannot be positioned and installed, and the subsequent support formwork 12 and pouring process cannot be carried out. Therefore, the setting of the locking member 9 can force workers to inspect the installation quality, effectively ensuring self-supervision during the entire construction process, and ultimately ensuring the overall quality. This structure is simple in principle, easy to connect, and low in cost. Workers can master it after simple training. Second, it plays the role of pulling and locking. The end of the locking member 9 has a locking thread 911. By using the template 12 to squeeze and support the reinforcement member 13, the upper and lower threaded rods 6 can be limited and pulled together. It has a high tensile strength, improves the connection strength of the longitudinal shear wall, and has a fast construction speed and improves construction efficiency.

[0073] This embodiment also proposes a construction method for a fully assembled prefabricated shear wall connection node, including the following steps:

[0074] S1: The shear wall unit is prefabricated in the factory. First, a production plan is made according to the design drawings and construction requirements, and the required raw materials and equipment are determined; then, concrete is added to the mold, and vibrated and cured. After the concrete solidifies, the mold is removed to obtain the shear wall unit.

[0075] S2: Transport the prefabricated shear wall units to the construction site.

[0076] S3: Arrange and position the shear wall units at the construction site according to the design requirements.

[0077] S4: Install the shear wall units on the lower floor:

[0078] The sleeve 4 at the top of the shear wall unit is used as a lifting connection point. The lifting device has a lifting ring that is detachably threaded and matched with the sleeve 4. The lifting ring is threadedly connected to the threaded sleeve 4 at the top of the shear wall unit to be lifted. The lifting device is used to lift the shear wall unit at the lower level and install it in place on the base. Then, the lifting ring is removed and the threaded rod 6 is threadedly connected to the sleeve 4. It should be noted that during the installation process, adjustment and alignment are required to ensure the verticality and flatness of the shear wall unit.

[0079] S5: Installation of steel components 5:

[0080] The steel member 5 is positioned and installed on the boss 2 at the top of the shear wall unit of the lower layer, and the end of the boss 2 is inserted into the corresponding cavity of the steel member 5; the top end of the installed threaded rod 6 passes through the corresponding insertion hole 521 of the steel member 5 and enters the installation space; the boss 2 is adjusted to correspond to the centering bolt 8 so that the central axis of the steel member 5 is in line with the central axis of the shear wall unit of the lower layer; after adjustment in place, the fastening nut 7 is screwed on the threaded rod 6 to fix it.

[0081] S6: Installation of shear wall elements on the upper floor:

[0082] Install the threaded rod 6 in the sleeve 4 at the bottom of the shear wall unit in advance; use the lifting method in S4 to lift the shear wall unit on the upper layer into place, so that the boss 2 at the bottom of the shear wall unit on the upper layer is correspondingly inserted into the clamping cavity at the top of the steel component 5; the bottom end of the corresponding threaded rod 6 passes through the corresponding insertion hole 521 to enter the installation space, and then adjust the corresponding centering bolt 8 of the upper shear wall unit so that the central axis of the upper shear wall unit is colinear with the central axis of the steel component 5 and the central axis of the lower shear wall unit; after adjustment in place, screw the fastening nut 7 on the threaded rod 6 to fix it.

[0083] S7: Install locking element 9:

[0084] It is assumed that when the arc-shaped opening of the plug plate 91 is fitted with the threaded rod 6, the distance between the vertical section of the plug plate 91 or the pressure platform and the wing plate 51 is L1; the worker inserts the locking piece 9 into the sliding hole 512 and slides along the sliding hole 512 until the plug plate 91 cannot move. At this time, the actual distance between the vertical section of the plug plate 91 or the pressure platform and the wing plate 51 is recorded as L2. If the value of L2 is significantly greater than L1, it means that the end of the plug plate 91 touches the fastening nut 7 instead of the threaded rod 6, which means that the corresponding fastening nut 7 is not screwed in place and does not meet the construction requirements and needs to be retightened; if the value of L2 is equal to L1, it means that the end of the plug plate 91 touches the threaded rod 6 instead of the fastening nut 7, which means that the corresponding fastening nut 7 is screwed in place and meets the construction requirements; based on the sliding distance of the plug plate 91, it can be judged whether the fastening nut 7 is screwed in place; the units of L2 and L1 are centimeters;

[0085] According to the detection result of the locking member 9, the unqualified fastening nut 7 is readjusted and tightened to meet the construction requirements.

[0086] S8: Install overlapping steel bars 31: Install overlapping steel bars 31 between the steel bar heads 3 corresponding to the shear wall units of the upper and lower layers, so that the steel bar heads 3 of the upper and lower layers are connected as a whole.

[0087] S9: Installation template 12:

[0088] The template 12 is supported and the pressure platform of the locking member 9 is squeezed inside the template 12, so that the arc-shaped opening at the end of the locking member 9 is tightly fitted on the end of the threaded rod 6, and the locking thread 911 is engaged with the thread of the threaded rod 6, so as to limit the threaded rod 6 by the locking member 9 and connect the upper and lower threaded rods 6; when the template 12 is installed in place, the end of the locking member 9 is just stuck on the threaded rod 6.

[0089] S10: Casting:

[0090] The formwork 12 has a pouring port, and concrete is poured into the formwork 12 to form secondary pouring concrete.

[0091] S11: demoulding.

[0092] Application results:

[0093] Compared with the cast-in-place reinforced concrete shear wall structure, most of the components of the present invention are prefabricated in the factory, and then a small amount of necessary concrete is poured after being assembled on site. The factory production efficiency is high, and the manufacturing accuracy and quality can be guaranteed, which is green and environmentally friendly. The prefabricated and assembled shear wall structure with steel components 5 connected up and down in the present invention adopts an open installation method, abandons the traditional concealed installation, cancels the grouting of the sleeve 4, reduces the installation accuracy requirements on the construction site, and greatly improves the installation efficiency. The steel component 5 replaces the grouting of the sleeve 4, which saves the project cost. The upper and lower vertical node connections are more reliable and the integrity is better. The nodes and the steel components 5 form a whole, which greatly improves the bearing capacity of the shear wall. At the same time, it has obvious multiple earthquake-resistant lines, which makes the building have excellent earthquake resistance.

[0094] Embodiment 2:

[0095] like Fig.11 - Fig.13 As shown, other structures are the same as those in the first embodiment, except that, in the present embodiment, adjacent steel members 5 are further connected with reinforcement members 13, which are in an "X" shape, with positioning columns 131 at the four corners of the reinforcement member 13, and a center hole 132 is provided at the center position of the reinforcement member 13; the wing plate 51 is provided with a positioning hole 513 adapted to be plugged with the positioning column 131; the reinforcement members 13 located on both sides of the steel member 5 are connected by tension bolts, and the tension bolts connect the steel member 5 and the reinforcement members 13 on both sides as a whole.

[0096] This embodiment also proposes a construction method for a fully assembled prefabricated shear wall connection node. The fully assembled prefabricated shear wall connection node described in this embodiment includes the following steps:

[0097] The other construction steps are the same as those in the method of the first embodiment, except that before the step S9, the following steps are also included:

[0098] S8-1: Install the reinforcement 13. The specific process is: insert the positioning columns 131 at the four corners of the reinforcement 13 into the corresponding positioning holes 513, then insert the tension bolts into the center hole 132 of the reinforcement 13, and tighten the tension nuts so that the reinforcement 13 located on both sides of the steel component 5 are tightened and fixed.

[0099] Application results: The reinforcement 13 is in an "X" shape as a whole. The steel member 5 and the reinforcements 13 on both sides can be connected as a whole through tension bolts. The connection is reliable and the force is clear. It can well transfer the shear force between the shear wall units and has stronger shear resistance. Combined with the provided steel bar head 3 and the lap steel bar 31, the connection reliability is higher.

[0100] Embodiment three:

[0101] like Figure 8 - Fig.10 As shown, on the basis of the first or second embodiment, the present embodiment further includes a steel mesh 10, the steel mesh 10 is fixedly connected with two sliding sleeves 1001, the sliding sleeve 1001 can be sleeved on the pressure head 92, and slide relative to the pressure head 92; the pressure head 92 is also sleeved with a compression spring 11, one end of the compression spring 11 is connected to the plug plate 91, and the other end is connected to the steel mesh 10; the sliding sleeve 1001 cooperates with the compression spring 11 to control the spacing between the steel mesh 10 and the template 12. When the template 12 is installed, the template 12 can automatically squeeze the steel mesh 10 to move inward, so that the distance can be automatically controlled, without manual re-checking and verification, the spacing control is easy to control, the construction quality is guaranteed, time and labor are saved, and the construction speed is improved and the operation of the workers is simplified.

[0102] In this embodiment, considering the lack of support at the top and bottom of the steel mesh 10, it may be deformed during pouring, affecting the construction quality, so a limit clamp 81 is fixedly connected to the head of the centering bolt 8 to position the steel mesh 10. When the steel mesh 10 is moved inwardly into place, the steel mesh 10 just rests on the surface of the limit clamp 81, playing a supporting role.

[0103] This embodiment also proposes a construction method of a fully assembled prefabricated shear wall connection node, based on a fully assembled prefabricated shear wall connection node described in this embodiment, including the following steps:

[0104] The other steps are the same as those in the first or second embodiment, except that:

[0105] Before the S9 process, the following steps are also included:

[0106] S8-2: Install the steel mesh 10. The specific process is as follows: the connection between the steel mesh 10 and the sliding sleeve 1001 is processed in advance in the project; a compression spring 11 is mounted on the pressure platform, and then the sliding sleeve 1001 is mounted on the pressure platform, and the steel mesh 10 can squeeze the compression spring 11; in S9, when the template 12 is installed, the inner side of the template 12 will squeeze the sliding sleeve 1001, so that the sliding sleeve 1001 and the steel mesh 10 move inward; the installation of the template 12 is used to realize the self-control of the distance between the steel mesh 10 and the template 12.

[0107] Application results: The structure of the steel mesh 10, the sliding sleeve 1001 and the compression spring 11 uses the steel mesh 10 to enhance the overall strength of the connection and also has good crack resistance; the positioning control of the steel mesh 10 is self-controlled by the sliding sleeve 1001 and the compression spring 11, which is simple and convenient and can easily form continuous standardized construction.

[0108] In summary, combined with the above embodiments, it can be seen that the fully assembled prefabricated shear wall connection node and its construction method provided by the present invention have a simple structure, low cost, strong shear resistance, and reliable force transmission; the construction operation is convenient, easy to position and control, high precision, and strong versatility, and can be widely used in assembled shear wall structures.

[0109] Although the above describes the specific implementation mode of the invention in conjunction with the drawings, it is not intended to limit the scope of protection of the invention. Based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. A fully assembled prefabricated shear wall connection node, characterized in that: It includes two sets of shear wall units arranged vertically. The shear wall unit includes a wall body (1), a steel reinforcement cage (101) is arranged inside the wall body (1). At the upper and lower ends of the wall body (1), two sets of spaced bosses (2) are respectively arranged. A sleeve (4) with internal threads is预埋 in the boss (2); There is also an exposed steel bar head (3) between adjacent bosses (2), and the steel bar head (3) is fixedly connected to the steel reinforcement cage (101); A steel member (5) is arranged between the two sets of shear wall units for connecting the corresponding upper and lower bosses (2); The steel member (5) includes two oppositely arranged wing plates (51), and two sets of web plates (52) are arranged between the wing plates (51). The web plates (52) divide the space between the two wing plates (51) so that the upper and lower ends of the steel member (5) form clamping cavities; The wing plate (51) is threadedly connected with a centering bolt (8) for controlling the center line of the wall body (1); The cross-sectional shapes of the wing plate (51) and the web plate (52) are in a ladder-shaped structure; An installation space is formed between the two sets of web plates (52); A jack (521) is opened on the web plate (52); The sleeve (4) of the upper and lower adjacent bosses (2) is threadedly connected with a threaded rod (6), and one end of the threaded rod (6) can penetrate through the jack (521) and enter the installation space; The threaded rod (6) is threadedly connected with a fastening nut (7); There is also secondary cast-in-place concrete between the two sets of shear wall units arranged vertically. The secondary cast-in-place concrete wraps the bosses (2) and the steel member (5) to form an integral structure; It also includes a locking member (9) for detecting the position of the fastening nut (7) and locking the threaded rod (6). The locking member (9) includes a "C"-shaped insertion plate (91), and a pressure-bearing head (92) is fixedly connected to the side wall of the insertion plate (91); A sliding hole (512) adapted to the insertion plate (91) is opened on the wall of the wing plate (51) of the steel member (5), and one end of the insertion plate (91) can freely penetrate through the sliding hole (512); If the fastening nut (7) is screwed in place, when the insertion plate (91) is slid along the sliding hole (512), one end of the insertion plate (91) will not touch the fastening nut (7); If the fastening nut (7) is not screwed in place, when the insertion plate (91) is slid along the sliding hole (512), one end of the insertion plate (91) will touch the fastening nut (7); Relying on the sliding distance of the insertion plate (91), it can be judged whether the fastening nut (7) is screwed in place; An arc-shaped opening is opened at the end of the insertion plate (91), and a locking thread (911) is provided on the surface of the arc-shaped opening. When the arc-shaped opening is clamped on the surface of the threaded rod (6), the locking thread (911) can be engaged with the thread of the threaded rod (6) itself to achieve vertical limit.

2. A fully assembled prefabricated shear wall connection node according to claim 1, characterized in that: It also comprises a steel mesh (10), the steel mesh (10) being fixedly connected to two sliding sleeves (1001), the sliding sleeves (1001) being able to be sleeved on the pressure-bearing head (92) and slide relative to the pressure-bearing head (92); a compression spring (11) is sleeved on the pressure-bearing head (92), one end of the compression spring (11) being connected to the plug plate (91), and the other end being connected to the steel mesh (10); the sliding sleeve (1001) cooperates with the compression spring (11) to control the distance between the steel mesh (10) and the template (12).

3. A fully assembled prefabricated shear wall connection node according to claim 2, characterized in that: It also includes overlapping steel bars (31), both ends of which are fixedly connected to the steel bar heads (3).

4. A fully assembled prefabricated shear wall connection node according to claim 3, characterized in that: A reinforcement piece (13) is also connected between adjacent steel members (5), the reinforcement piece (13) being in an "X" shape, having positioning columns (131) at four corners, and a center hole (132) being provided at the center of the reinforcement piece (13); the wing plate (51) is provided with a positioning hole (513) adapted to be plugged into the positioning column (131); the reinforcement pieces (13) located on both sides of the steel member (5) are connected by tension bolts, and the tension bolts connect the steel member (5) and the reinforcement pieces (13) on both sides into one.

5. A fully assembled prefabricated shear wall connection node according to claim 4, characterized in that: The head of the centering bolt (8) is fixedly connected to a limiting clamping disc (81) for positioning the steel mesh (10).

6. A construction method for a fully assembled prefabricated shear wall connection node, characterized in that: A fully assembled prefabricated shear wall connection node according to claim 5 comprises the following steps: S1: prefabricated shear wall unit; S2: transport the prefabricated shear wall units to the construction site; S3: Arrange and position the shear wall units at the construction site according to the design requirements; S4: Install the shear wall units on the lower floor: The sleeve (4) at the top of the shear wall unit is used as a lifting connection point, and the lifting device has a lifting ring that is detachably threaded and matched with the sleeve (4); the lifting ring is threadedly connected to the threaded sleeve (4) at the top of the shear wall unit to be lifted, and the lifting device is used to lift the shear wall unit located at the lower layer and install it in place on the base; then, the lifting ring is removed, and the threaded rod (6) is threadedly connected to the sleeve (4); S5: Install steel components (5): The steel member (5) is positioned and installed on the boss (2) at the top of the shear wall unit of the lower layer, and the end of the boss (2) is inserted into the corresponding clamping cavity of the steel member (5); the top end of the installed threaded rod (6) passes through the corresponding insertion hole (521) of the steel member (5) and enters the installation space; the corresponding centering bolt (8) of the boss (2) is adjusted so that the central axis of the steel member (5) is in line with the central axis of the shear wall unit of the lower layer; after the adjustment is in place, the fastening nut (7) is screwed on the threaded rod (6) to fix it; S6: Installation of shear wall elements on the upper floor: Install a threaded rod (6) in the sleeve (4) at the bottom of the shear wall unit in advance; use the hoisting method in S4 to hoist the shear wall unit located on the upper layer into place, so that the boss (2) at the bottom of the shear wall unit located on the upper layer is correspondingly inserted into the clamping cavity at the top of the steel component (5); the bottom end of the corresponding threaded rod (6) passes through the corresponding insertion hole (521) and enters the installation space, and then adjust the corresponding centering bolt (8) of the upper shear wall unit so that the central axis of the upper shear wall unit is arranged in line with the central axis of the steel component (5) and the central axis of the lower shear wall unit; after adjusting in place, screw the fastening nut (7) on the threaded rod (6) to fix it; S7: Install the locking element (9): When the arc-shaped opening of the plug plate (91) is fitted with the threaded rod (6), the distance between the vertical section of the plug plate (91) or the pressure platform and the wing plate (51) is set to L1; the worker inserts the locking member (9) into the sliding hole (512) and slides along the sliding hole (512) until the plug plate (91) cannot move. At this time, the actual distance between the vertical section of the plug plate (91) or the pressure platform and the wing plate (51) is recorded as L2. If the value of L2 is significantly greater than L1, it means that the plug plate (91) is If the end touches the fastening nut (7) instead of the threaded rod (6), it means that the corresponding fastening nut (7) is not screwed into place, does not meet the construction requirements, and needs to be re-tightened; if the value of L2 is equal to L1, it means that the end of the plug plate (91) touches the threaded rod (6) instead of the fastening nut (7), which means that the corresponding fastening nut (7) is screwed into place, which meets the construction requirements; based on the sliding distance of the plug plate (91), it can be judged whether the fastening nut (7) is screwed into place; Based on the test result of the locking member (9), the unqualified fastening nut (7) is readjusted and tightened to meet the construction requirements; S8: Installing overlapping steel bars (31): installing overlapping steel bars (31) between the steel bar heads (3) corresponding to the shear wall units of the upper and lower layers, so that the steel bar heads (3) of the upper and lower layers are connected as one; S9: Installation template (12): A template (12) is supported, and the inner side of the template (12) squeezes the pressure platform of the locking member (9), so that the arc-shaped opening at the end of the locking member (9) is tightly fitted on the end of the threaded rod (6), and the locking thread (911) is buckled with the thread of the threaded rod (6), so that the locking member (9) limits the threaded rod (6) and the upper and lower threaded rods (6) are connected; S10: Casting: pouring concrete into the formwork (12) to form secondary pouring concrete; S11: demoulding.

7. A construction method for a fully assembled prefabricated shear wall connection node according to claim 6, characterized in that: Before the S9 process, the following steps are also included: S8-1: Install the reinforcement member (13), the specific process is: insert the positioning columns (131) at the four corners of the reinforcement member (13) into the corresponding positioning holes (513), then insert the tension bolts into the center hole (132) of the reinforcement member (13), and tighten the tension nuts, so that the reinforcement members (13) located on both sides of the steel member (5) are tightened and fixed.

8. The construction method of a fully assembled prefabricated shear wall connection node according to claim 6, characterized in that: Before the S9 process, the following steps are also included: S8-2: installing the steel mesh (10), the specific process is as follows: the connection between the steel mesh (10) and the sliding sleeve (1001) is processed in advance in the project; a compression spring (11) is sleeved on the pressure platform, and then the sliding sleeve (1001) is sleeved on the pressure platform, so that the steel mesh (10) can press the compression spring (11); in S9, when the template (12) is installed, the inner side of the template (12) will press the sliding sleeve (1001), so that the sliding sleeve (1001) and the steel mesh (10) move inward; and the installation of the template (12) is used to realize the self-control of the distance between the steel mesh (10) and the template (12).

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