Prefabricated hybrid coupled wall construction free lateral bracing system and installation method thereof

Abstract

The application discloses an assembled mixed coupled limb wall construction lateral support-free system and an installation method. The system comprises a plurality of reinforced concrete walls, vertically adjacent reinforced concrete walls are connected through vertical assembly units, and horizontally adjacent reinforced concrete walls are connected through horizontal assembly units. The vertical assembly unit comprises an upper pre-buried short steel column and a lower pre-buried short steel column arranged at the upper end and the lower end of the reinforced concrete wall respectively. Vertically adjacent reinforced concrete walls are positioned through an assembly positioning unit and connected through a bolt group connecting the upper pre-buried short steel column and the lower pre-buried short steel column. The application does not need to set lateral temporary support, the horizontal joint connection mechanical transmission route is clear, safe and reliable, and quality inspection is convenient. The installation efficiency of the assembled mixed coupled limb wall is improved, floor concrete can be poured at one time, and secondary pouring is not needed. The standardization degree of the coupled limb wall unit component is improved, and the component mold types are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prefabricated hybrid coupled wall, in particular to a prefabricated hybrid coupled wall construction lateral support-free system and installation method. BACKGROUND

[0002] High-rise building structure is an inevitable choice to solve the contradiction between the growing urban population and the gradually scarce urban land in the process of urbanization in China, and coupled wall structure is an indispensable element in high-rise building structure. Coupled wall system not only inherits the advantages of low engineering cost and large lateral stiffness of pure shear wall, but also embodies the advantages of yielding of coupling beam under strong earthquake, reducing a large number of cracks concentrated at the bottom of the wall, and reducing the post-earthquake repair cost.

[0003] The prefabricated hybrid coupled wall forms a structure "seismic fuse" through the joint steel beam arranged in the prefabricated unit and the external steel coupling beam, which not only can significantly improve the seismic performance of the traditional prefabricated coupled wall, but also realizes the dry connection of vertical joints, effectively solving the problems of complicated formwork support and long construction period caused by wet connection. The horizontal joint connection of the prefabricated hybrid coupled wall is consistent with the horizontal joint of the traditional prefabricated shear wall, and still uses the conventional methods such as sleeve grouting and ring reinforcement buckling connection for connection.

[0004] Sleeve grouting has the advantages of clear force transmission path and reliable connection, and is the most commonly used connection method in prefabricated structure. However, the sleeve grouting connection method also has some disadvantages. On the one hand, the grouting work of sleeve grouting is highly concealed, which makes quality inspection difficult and has certain safety hazards. On the other hand, during the installation of upper and lower shear walls, the steel bars need to be centered and adjusted with the sleeves, which occupies a large amount of time of the tower crane, and is one of the main factors causing the long construction period of prefabricated shear walls. In addition, there are many construction procedures. During the sleeve grouting connection process, the prefabricated shear wall needs to be laterally supported to ensure that it does not overturn. The lateral support needs to be pre-buried in the floor, prefabricated shear wall and other positions in advance, and needs to be removed later. At the same time, the lateral support stays for a long time, which hinders the steel bar binding construction.

[0005] In order to ensure the safety of the ring reinforcement buckling connection construction at the horizontal joint of the prefabricated shear wall, the current construction technology is to first artificially divide the composite floor into different areas for pouring, and then hoist the upper layer for lateral support after the floor concrete is solidified, and then pour the gap concrete between the upper and lower walls. Because the horizontal buckling area is higher than the floor, this area cannot be poured densely, which exists quality and safety hazards. In addition, the floor concrete is poured in two or more times, which increases the construction procedures and also increases the concrete solidification time, thereby prolonging the construction period. SUMMARY

[0006] In view of the deficiencies in the background art, the present application provides an assembled hybrid coupled wall construction free lateral support system and installation method, which solves the technical problems of complicated construction process, long construction period and difficult to guarantee construction quality of the assembled shear wall.

[0007] The technical solution of the present application is:

[0008] An assembled hybrid coupled wall construction free lateral support system, comprising a plurality of reinforced concrete walls, vertically adjacent reinforced concrete walls are connected through vertical assembly units, and horizontally adjacent reinforced concrete walls are connected through horizontal assembly units, the vertical assembly unit comprises upper and lower pre-buried short steel columns arranged at the upper and lower ends of the reinforced concrete wall respectively, vertically adjacent reinforced concrete walls are positioned through assembly positioning units and connected through a bolt set connecting the upper and lower pre-buried short steel columns, the horizontal assembly unit comprises pre-buried steel beams arranged on both sides of the upper end of the reinforced concrete wall, and horizontally adjacent reinforced concrete walls are connected through adjacent pre-buried steel beams.

[0009] Further, the height of the node area of the vertical assembly unit, the horizontal assembly unit and the prefabricated composite floor is lower than the floor elevation, and the steel bars in the prefabricated composite floor extend into the horizontal joint. In the wall assembly unit construction free lateral support system, the fixing between the upper and lower wall assembly units in the present technical solution is realized by connecting the pre-buried steel columns, the ring reinforcement is staggered and buckled up and down along the horizontal joint direction of the wall, and the steel bars in the composite floor extend into the horizontal joint, thereby realizing reliable connection between the walls and the floor. To ensure quality, the height of the wall horizontal joint is slightly lower than the thickness of the composite floor.

[0010] Further, the upper and lower pre-buried short steel columns are arranged staggered in the horizontal direction, and the upper and lower pre-buried short steel columns are mutually attached when the vertically adjacent reinforced concrete walls are assembled.

[0011] Further, the upper pre-buried short steel column is provided with an assembly round hole and a pre-assembly oval hole, the lower pre-buried short steel column is provided with a mounting round hole matched with the assembly round hole and a pre-assembly round hole matched with the pre-assembly oval hole, the bolt set comprises a pressure type connecting bolt and a high-strength friction type connecting bolt, the pressure type connecting bolt is connected between the pre-assembly oval hole and the pre-assembly round hole, and the high-strength friction type connecting bolt is connected between the assembly round hole and the mounting round hole.

[0012] Further, the pre-assembly oval hole is located below the assembly round hole, the pre-assembly round hole is located below the mounting round hole, the diameter of the pre-assembly oval hole is greater than the diameter of the assembly round hole, and the diameter of the pre-assembly round hole is greater than the diameter of the mounting round hole. A hole marking line is arranged between the upper and lower pre-buried short steel columns.

[0013] Further, the upper and lower pre-buried short steel columns are both channel steel structures, the assembly round hole, pre-assembly oval hole, installation round hole and pre-assembly round hole are respectively arranged on the web of the corresponding channel steel structure, and the webs of the upper and lower pre-buried short steel columns are mutually attached when the vertically adjacent reinforced concrete walls are assembled. The cross section of the upper and lower pre-buried short steel columns is channel-shaped, the width is less than the width of the ring, is buried in the wall assembly unit, and the length extending out of the concrete wall is about 15-50 cm. In addition, the short steel column flange side wall is also provided with a hole positioning line to facilitate wall installation. In addition, the root of the upper pre-buried short steel column is welded with the pre-buried steel beam, and the lower pre-buried short steel column does not penetrate the concrete wall.

[0014] Further, the upper and lower ends of the reinforced concrete wall are respectively provided with at least two upper pre-buried short steel columns and at least two lower pre-buried short steel columns, upper ring bars are arranged between adjacent upper pre-buried short steel columns, and lower ring bars are arranged between adjacent lower pre-buried short steel columns.

[0015] Further, the assembly positioning unit includes upper positioning bar reserved holes and lower positioning bar reserved holes arranged at the upper and lower ends of the reinforced concrete wall, and a positioning device is arranged between the corresponding upper positioning bar reserved holes and lower positioning bar reserved holes between the vertically adjacent reinforced concrete walls. The positioning device includes a lower positioning bar arranged in the upper positioning bar reserved hole and an upper positioning bar arranged in the lower positioning bar reserved hole. The lower end of the upper positioning bar is threadedly connected with an adjustable nut, the upper end of the lower positioning bar is threadedly connected with a connecting sleeve, and the lower end of the upper positioning bar is inserted into the connecting sleeve.

[0016] Further, the upper positioning bar is a non-linear structure, and a prismatic section is arranged on the upper positioning bar. A limiting ring for limiting the rotation of the upper positioning bar is sleeved on the prismatic section. The limiting ring is connected with a positioning frame, and the positioning frame is circumferentially blocked with the lower pre-buried short steel column. The positioning device is S-shaped or N-shaped or horn-shaped as a whole, and has the functions of being detachable and adjustable in length. The positioning device mainly includes four parts, namely the upper positioning bar, the lower positioning bar, the connecting sleeve and the adjustable nut. The vertical bar section below the upper positioning bar and the lower positioning bar are both provided with an external thread section, and the diameter of the external thread section is greater than the diameters of the remaining sections of the steel bars. The two ends of the upper positioning steel bar are linear sections without threads at the end heads, and the middle is a curved section. The lower positioning bar is a linear section with an external thread at one end. The connecting sleeve has an internal thread section adapted to the external thread sections of the upper and lower positioning bars, so as to rotate the connecting sleeve to adjust and detach the positioning device. In addition, the diameter of the connecting sleeve should be greater than the diameter of the steel bar reserved hole.

[0017] A mounting method of a prefabricated hybrid coupled wall construction free lateral support system, comprising the prefabricated hybrid coupled wall construction free lateral support system, and the mounting steps comprising:

[0018] Step 1: Transport the precast reinforced concrete wall to the site;

[0019] Step 2: Insert the lower positioning bar of the assembled positioning device into the reserved hole of the upper positioning bar in the lower reinforced concrete wall. After positioning the direction of the positioning device, put the limiting ring into the prismatic section so that the positioning frame is supported by the lower embedded short steel column.

[0020] Step 3: Hoist the upper reinforced concrete wall to the top of the lower reinforced concrete wall. Gradually fit the lower positioning bar of the upper reinforced concrete wall into the upper positioning bar of the positioning device, so that the reinforced concrete wall can slowly fall along the positioning device. Observe the hole marking lines on the upper and lower embedded short steel columns for preliminary positioning.

[0021] Step 4: After the hole marking lines on the upper and lower pre-embedded short steel columns are aligned, insert bearing-type connecting bolts between the pre-installed elliptical holes and pre-installed round holes between the lower pre-embedded short steel column of the upper reinforced concrete wall and the upper pre-embedded short steel column of the lower and upper reinforced concrete walls to perform wall correction.

[0022] Step 5: After the wall is corrected, high-strength friction-type connecting bolts and corresponding fastening nuts are inserted into the assembly round holes and installation round holes between the lower embedded short steel columns of the upper reinforced concrete wall and the upper embedded short steel columns of the lower and upper reinforced concrete walls to connect and fix them.

[0023] Step Six: Connect and tighten the initially inserted bearing bolts;

[0024] Step 7: Rotate the connecting sleeve in the positioning rebar assembly to pull the limiting ring out of the prismatic section, disassemble and remove the positioning device;

[0025] Step 8: When assembling the reinforced concrete wall in the horizontal direction, connect the embedded steel beam of the left reinforced concrete wall with the embedded steel beam of the right reinforced concrete wall by connecting bolts and fastening nuts or by welding. Then fill the gap under the embedded steel beam with aerated concrete blocks or leave it as a door or window opening.

[0026] Step 9: Hoist the precast composite floor slab into place, leaving a predetermined distance between the end of the precast composite floor slab and the reinforced concrete wall. The embedded steel bars of the precast composite floor slab extend into the pouring gap formed by the upper and lower reinforced concrete walls, which is lower than the floor slab.

[0027] Step 10: Support and reinforce the gap between the end of the precast composite floor slab and the reinforced concrete wall as described in Step 9;

[0028] Step 11: Repeat steps one through ten above to complete the construction of the entire prefabricated hybrid coupled wall system without lateral support.

[0029] Step 12: Pour floor concrete. The concrete on the precast composite floor slab flows into the gap between the upper and lower reinforced concrete walls under gravity, and is then vibrated and cured.

[0030] Compared with the prior art, the beneficial effects of the present invention include:

[0031] 1. The mechanical transmission path of the horizontal joint connection in the prefabricated hybrid wall is clear, safe and reliable, and convenient for quality inspection;

[0032] 2. When connecting horizontal joints in prefabricated hybrid composite walls, no lateral temporary supports are required. The wall assembly units can be fixed simply by using bolt connections installed between pre-embedded steel columns.

[0033] 3. By pre-embedding steel columns and joint steel beams, it is possible to quickly connect the various coupled wall units, which facilitates the rapid formation of an overall frame and improves the installation efficiency of prefabricated hybrid coupled walls;

[0034] 4. The joint area between the upper and lower adjacent layer connecting walls and the composite floor slab is lower than the floor slab elevation, so the floor concrete can be poured in one go without secondary pouring; this avoids the quality problem of insufficient compaction caused by secondary pouring, eliminates the need for secondary concrete pouring, effectively reduces construction procedures, and saves construction time;

[0035] 5. It improves the standardization of prefabricated components of coupled wall units, reduces the types of component molds, enables the reuse of templates, and helps control the quality of prefabricated components of coupled wall units; at the same time, it facilitates component transportation and hoisting; and helps reduce the overall project cost. Attached Figure Description

[0036] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of a prefabricated hybrid coupled wall structure system;

[0038] Figure 2 This is a schematic diagram of a wall assembly unit;

[0039] Figure 3 for Figure 2 View from AA direction;

[0040] Figure 4 for Figure 2 BB-direction view;

[0041] Figure 5A lateral support-free system for the construction of wall assembly units;

[0042] Figure 6 This is a schematic diagram of the pre-embedded steel column;

[0043] Figure 7 This is a schematic diagram of the pre-embedded steel column.

[0044] Figure 8 This is a schematic diagram of the positioning device;

[0045] Figure 9 A schematic diagram showing the horizontal joint connection between the upper and lower wall assembly units;

[0046] Reference numerals: 1-Wall assembly unit; 2-Reinforced concrete wall; 3-Upper embedded short steel column; 4-Lower embedded short steel column; 5-Embedded steel beam; 6-Upper ring reinforcement; 7-Lower ring reinforcement; 8-Steel connecting beam; 9-Assembly round hole; 10-Pre-installed elliptical hole; 11-Hole positioning line; 12-Positioning device; 13-Upper positioning reinforcement; 14-Lower positioning reinforcement; 15-Connecting sleeve; 16-Adjustable nut; 17-Lower positioning reinforcement reserved hole; 18-Upper positioning reinforcement reserved hole; 19-Precast composite floor slab; 20-Hollow block; 21-Cast-in-place concrete floor slab; 22-High-strength friction type connecting bolt; 23-Bearing type connecting bolt; 24-C-type or L-type template; 25-Field joint; 26-Installation round hole; 27-Pre-installed round hole; 28-Rhomboid segment; 29-Limiting ring; 30-Positioning frame. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] A prefabricated hybrid coupled wall construction system that eliminates the need for lateral bracing, such as... Figures 1-3As shown, the wall assembly unit includes multiple wall assembly units 1 connected horizontally and vertically. Each wall assembly unit 1 includes a reinforced concrete wall 2. Vertically adjacent reinforced concrete walls 2 are connected by vertical assembly units, and horizontally adjacent reinforced concrete walls 2 are connected by horizontal assembly units. The vertical assembly unit includes an upper pre-embedded short steel column 3 and a lower pre-embedded short steel column 4 respectively set at the upper and lower ends of the reinforced concrete wall 2. Vertically adjacent reinforced concrete walls 2 are positioned by assembly positioning units and connected by bolt groups connecting the upper pre-embedded short steel column 3 and the lower pre-embedded short steel column 4. The horizontal assembly unit includes pre-embedded steel beams 5 set on both sides of the upper end of the reinforced concrete wall 2. Horizontally adjacent reinforced concrete walls 2 are connected by adjacent pre-embedded steel beams 5.

[0049] Based on the above embodiments, as a preferred embodiment, the height of the node area between the vertical assembly unit, the horizontal assembly unit, and the precast composite floor slab 19 is lower than the floor slab elevation. The reinforcing bars in the precast composite floor slab 19 extend into the horizontal joint, and the bottom surface of the wall is 1-3 cm lower than the floor elevation. In the above-mentioned wall assembly unit construction without lateral support system, the fixing between the upper and lower wall assembly units in this technical solution is achieved through pre-embedded steel column connections, with the ring reinforcement interlocking vertically along the horizontal joint of the wall. After on-site hoisting, the reinforcing bars in the composite floor slab 210 cm to 30 cm away from the reinforced concrete wall extend into the horizontal joint, thereby achieving a reliable connection between walls and between walls and the floor slab. To ensure quality, the height of the horizontal joint of the wall is slightly lower than the thickness of the composite floor slab.

[0050] Based on the above embodiments, as a preferred embodiment, the upper embedded short steel column 3 and the lower embedded short steel column 4 are staggered in the horizontal direction, and when the vertically adjacent reinforced concrete walls 2 are assembled, the upper embedded short steel column 3 and the lower embedded short steel column 4 are fitted together.

[0051] Based on the above embodiments, as a preferred embodiment, the upper pre-embedded short steel column 3 is provided with an assembly round hole 9 and a pre-installed elliptical hole 10, and the lower pre-embedded steel column 4 is provided with an installation round hole 26 matching the assembly round hole 9 and a pre-installed round hole 27 matching the pre-installed elliptical hole 10. The bolt group includes a bearing-type connecting bolt 23 and a high-strength friction-type connecting bolt 22. The bearing-type connecting bolt 23 is connected between the pre-installed elliptical hole 10 and the pre-installed round hole 27, and the high-strength friction-type connecting bolt 22 is connected between the assembly round hole 9 and the installation round hole 26.

[0052] Based on the above embodiments, as a preferred embodiment, the pre-installed elliptical hole 10 is located below the assembly circular hole 9, the pre-installed circular hole 27 is located below the installation circular hole 26, the diameter of the pre-installed elliptical hole 10 is larger than the diameter of the assembly circular hole 9, the diameter of the pre-installed circular hole 27 is larger than the diameter of the installation circular hole 26, and a hole alignment marking line 11 is provided between the upper pre-embedded short steel column 3 and the lower pre-embedded short steel column 4.

[0053] Based on the above embodiments, as a preferred embodiment, both the upper embedded short steel column 3 and the lower embedded short steel column 4 are channel steel structures. The assembly round hole 9, pre-installed elliptical hole 10, installation round hole 26, and pre-installed round hole 27 are respectively set on the web of the corresponding channel steel structure. When the vertically adjacent reinforced concrete wall 2 is assembled, the web of the upper embedded short steel column 3 and the web of the lower embedded short steel column 4 are in close contact with each other. The cross-section of the upper and lower embedded short steel columns is channel-shaped, and its width is less than the width of the ring reinforcement. They are embedded in the wall assembly unit, and the length extending out of the concrete wall is about 15-50cm. In addition, the flange sidewall of the short steel column is also provided with hole positioning lines to facilitate wall installation. Furthermore, the root of the upper embedded short steel column is welded to the embedded steel beam, while the lower embedded short steel column does not penetrate the concrete wall.

[0054] Based on the above embodiments, as a preferred embodiment, at least two upper embedded short steel columns 3 and at least two lower embedded short steel columns 4 are respectively provided at the upper and lower ends of the reinforced concrete wall 2, with upper ring bars 6 provided between adjacent upper embedded short steel columns 3 and lower ring bars 7 provided between adjacent lower embedded short steel columns 4.

[0055] Based on the above embodiments, as a preferred embodiment, the assembly positioning unit includes upper positioning bar reserved holes 18 and lower positioning bar reserved holes 17 respectively set at the upper and lower ends of the reinforced concrete wall 2. A positioning device is set between the corresponding upper positioning bar reserved holes 18 and lower positioning bar reserved holes 17 between vertically adjacent reinforced concrete walls 2. The positioning device includes a lower positioning bar 14 set in the upper positioning bar reserved hole 18 and an upper positioning bar 13 set in the lower positioning bar reserved hole 17. The lower end of the upper positioning bar 13 is threadedly connected to an adjustable nut 16, and the upper end of the lower positioning bar 14 is threadedly connected to a connecting sleeve 15. The lower end of the upper positioning bar 13 is inserted into the connecting sleeve 15.

[0056] Based on the above embodiments, as a preferred embodiment, the upper positioning rib 13 is a non-linear structure, with a prismatic segment 28 on it. A limiting ring 29 for restricting the rotation of the upper positioning rib 13 is sleeved on the prismatic segment 28. The limiting ring 29 is connected to a positioning frame 30, which engages with the lower embedded short steel column 4 in a circumferential stop configuration. When the lower embedded short steel column 4 is a channel steel structure, the positioning frame 30 is supported between the two flanges of the channel steel structure. The positioning frame 30 cannot swing left or right, but can only slide up and down, facilitating disassembly.

[0057] The aforementioned positioning device is S-shaped, N-shaped, or trumpet-shaped, and features detachability and adjustable length. The positioning device mainly comprises four parts: an upper positioning rib, a lower positioning rib, a connecting sleeve, and an adjustable nut. Both the vertical rib section below the upper positioning rib and the lower positioning rib have external threaded sections, with the diameter of the external threaded section being larger than the diameter of the other rib sections. The upper positioning rib has straight sections at both ends without threads, and a curved section in the middle; the lower positioning rib has a straight section with external threads at one end; the connecting sleeve has internal threaded sections that match the external threaded sections of the upper and lower positioning ribs, facilitating adjustment and disassembly of the positioning device by rotating the connecting sleeve, and the diameter of the connecting sleeve should be larger than the diameter of the pre-drilled hole in the rib.

[0058] As a preferred implementation method, such as Figure 3 and Figure 4 As shown, in this embodiment, the horizontal projections of the upper and lower pre-embedded short steel columns do not coincide, but are staggered in the horizontal direction; in the same wall assembly unit, the web of the upper pre-embedded short steel column 3 and the web of the lower pre-embedded short steel column 4 can be closely attached, and their horizontal projections form an H shape.

[0059] In this embodiment, in order to ensure that the horizontal plane at which the connecting holes in the upper and lower pre-embedded short steel columns are aligned is at the inclined section of the upper positioning steel bar in the positioning device, before the upper reinforced concrete wall is hoisted, the upper positioning steel bar, the lower positioning steel bar and the connecting sleeve should be assembled in advance to form a positioning device, and then inserted into the corresponding reserved hole. After that, the position of the connecting hole of the pre-embedded short steel column is observed and the length of the positioning device is adjusted.

[0060] During the hoisting and lowering of the upper reinforced concrete wall, when the wall comes into contact with the inclined section of the upper positioning bar, the upper reinforced concrete wall will slowly fall and be in place with the help of the resistance of the inclined section of the upper positioning bar. At this time, it should be ensured that the positioning line of the pre-embedded short steel column flange is aligned and the hole is drilled in time.

[0061] A method for installing a prefabricated hybrid coupled wall system without lateral support, comprising the aforementioned prefabricated hybrid coupled wall system without lateral support, wherein the wall assembly unit prefabrication stage includes:

[0062] Step 1: Lay and weld the steel mesh on one side of the wall steel reinforcement frame;

[0063] Step 2: Embed steel beams and corresponding structural steel bars, place upper and lower embedded steel columns in the predetermined positions, and weld the base of the upper embedded steel column to the embedded steel beam;

[0064] Step 3: Lay out and weld the steel mesh on the other side of the steel reinforcement cage, and connect it to the steel mesh in Step 1;

[0065] Step 4: Erect the wall assembly unit formwork and pour the concrete to form the desired shape;

[0066] Step 5: After the upper and lower wall assembly units are pre-assembled, holes are drilled in the upper and lower embedded steel columns, and the hole positioning lines are marked.

[0067] On-site installation steps include:

[0068] Step 1: Transport the precast reinforced concrete wall 2 to the site;

[0069] Step 2: Insert the lower positioning rib 14 of the assembled positioning device into the reserved hole 18 of the upper positioning rib of the lower reinforced concrete wall 2. After positioning the direction of the positioning device, put the limiting ring 29 into the prism section 28 so that the positioning frame 30 is supported by the lower embedded short steel column 4.

[0070] Step 3: Hoist the upper reinforced concrete wall 2 to the top of the lower reinforced concrete wall 2. Gradually fit the lower positioning bar reserved hole 17 of the upper reinforced concrete wall 2 into the upper positioning bar 13 of the positioning device, so that the lower reinforced concrete wall 2 slowly falls along the positioning device. Observe the hole marking line 11 on the upper embedded short steel column 3 and the lower embedded short steel column 4 for preliminary positioning.

[0071] Step 4: After the hole marking lines on the upper embedded short steel column 3 and the lower embedded short steel column 4 are aligned, the bearing type connecting bolt 23 is inserted between the pre-installed elliptical hole 10 and the pre-installed round hole 27 between the lower embedded short steel column 4 of the upper reinforced concrete wall 2 and the upper embedded short steel column 3 of the lower and upper reinforced concrete wall 2 to correct the wall.

[0072] Step 5: After the wall is corrected, high-strength friction type connecting bolts 22 and corresponding fastening nuts are inserted into the assembly round holes 9 and installation round holes 26 between the lower embedded short steel column 4 of the upper reinforced concrete wall 2 and the upper embedded short steel column 3 of the lower and upper reinforced concrete walls 2 to connect and fix them.

[0073] Step 6: Connect and tighten the initially inserted bearing-type connecting bolt 23;

[0074] Step 7: Rotate the connecting sleeve 15 in the positioning rebar assembly to pull the limiting ring 29 out of the prismatic segment 28, disassemble and remove the positioning device;

[0075] Step 8: When assembling the reinforced concrete wall 2 in the horizontal direction, connect the embedded steel beam 5 of the left reinforced concrete wall 2 with the embedded steel beam 5 of the right reinforced concrete wall 2 through connecting bolts and fastening nuts or welding. Then fill the gap under the embedded steel beam 5 with aerated concrete blocks 20 or leave it as a door or window opening.

[0076] Step 9: Hoist the precast composite floor slab 19 into place. The end of the precast composite floor slab 19 is left with a predetermined distance from the wall of the reinforced concrete wall 2. The embedded steel bars of the precast composite floor slab 19 extend into the pouring gap formed by the upper reinforced concrete wall 2 and the lower reinforced concrete wall 2, which is lower than the floor slab.

[0077] Step 10: Support and reinforce the gap between the end of the precast composite floor slab 19 and the reinforced concrete wall 2, which was constructed in Step 9;

[0078] Step 11: Repeat steps one through ten above to complete the construction of the entire prefabricated hybrid coupled wall system without lateral support.

[0079] Step 12: Pour floor concrete. The concrete on the precast composite floor slab 19 flows into the gap between the upper reinforced concrete wall 2 and the lower reinforced concrete wall 2 under the action of gravity. Vibrate and cure.

[0080] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0081] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A prefabricated hybrid coupled wall construction system without lateral support, comprising several reinforced concrete walls (2), wherein vertically adjacent reinforced concrete walls (2) are connected by vertical assembly units, and horizontally adjacent reinforced concrete walls (2) are connected by horizontal assembly units, characterized in that: The vertical assembly unit includes an upper embedded short steel column (3) and a lower embedded short steel column (4) respectively set at the upper and lower ends of the reinforced concrete wall (2). The vertically adjacent reinforced concrete walls (2) are positioned by the assembly positioning unit and connected by the bolt group connecting the upper embedded short steel column (3) and the lower embedded short steel column (4). The horizontal assembly unit includes embedded steel beams (5) set on both sides of the upper end of the reinforced concrete wall (2). The horizontally adjacent reinforced concrete walls (2) are connected by adjacent embedded steel beams (5). The assembly positioning unit includes upper positioning bar reserved holes (18) and lower positioning bar reserved holes (17) respectively set at the upper and lower ends of the reinforced concrete wall (2). A positioning device is set between the corresponding upper positioning bar reserved holes (18) and lower positioning bar reserved holes (17) between vertically adjacent reinforced concrete walls (2). The positioning device includes a lower positioning bar (14) set in the upper positioning bar reserved hole (18) and an upper positioning bar (13) set in the lower positioning bar reserved hole (17). The lower end of the upper positioning bar (13) is threaded with an adjustable nut (16), and the upper end of the lower positioning bar (14) is threaded with a connecting sleeve (15). The lower end of the upper positioning bar (13) is inserted into the connecting sleeve (15). The upper positioning rib (13) is a non-linear structure. A rhomboid segment (28) is provided on the upper positioning rib (13). A limiting ring (29) for restricting the rotation of the upper positioning rib (13) is attached to the rhomboid segment (28). The limiting ring (29) is connected to a positioning frame (30). The positioning frame (30) is circumferentially stopped by the lower pre-embedded short steel column (4).

2. The prefabricated hybrid linked wall construction system without lateral support according to claim 1, characterized in that: The height of the node area between the vertical assembly unit, the horizontal assembly unit and the precast composite floor slab (19) is lower than the floor slab elevation, and the reinforcing bars in the precast composite floor slab (19) extend into the horizontal joint.

3. The prefabricated hybrid linked wall construction system without lateral support according to claim 1 or 2, characterized in that: The upper embedded short steel column (3) and the lower embedded short steel column (4) are staggered in the horizontal direction. When the vertically adjacent reinforced concrete wall (2) is assembled, the upper embedded short steel column (3) and the lower embedded short steel column (4) are attached to each other.

4. The prefabricated hybrid linked wall construction system without lateral support according to claim 3, characterized in that: The upper pre-embedded short steel column (3) is provided with an assembly round hole (9) and a pre-installed elliptical hole (10). The lower pre-embedded short steel column (4) is provided with an installation round hole (26) matching the assembly round hole (9) and a pre-installed round hole (27) matching the pre-installed elliptical hole (10). The bolt group includes a bearing type connecting bolt (23) and a high-strength friction type connecting bolt (22). The bearing type connecting bolt (23) is connected between the pre-installed elliptical hole (10) and the pre-installed round hole (27). The high-strength friction type connecting bolt (22) is connected between the assembly round hole (9) and the installation round hole (26).

5. The prefabricated hybrid linked wall construction system without lateral support according to claim 4, characterized in that: The pre-installed elliptical hole (10) is located below the assembly circular hole (9), the pre-installed circular hole (27) is located below the installation circular hole (26), the diameter of the pre-installed elliptical hole (10) is larger than the diameter of the assembly circular hole (9), the diameter of the pre-installed circular hole (27) is larger than the diameter of the installation circular hole (26), and a hole marking line (11) is provided between the upper pre-embedded short steel column (3) and the lower pre-embedded short steel column (4).

6. The prefabricated hybrid linked wall construction system without lateral support according to claim 4 or 5, characterized in that: Both the upper embedded short steel column (3) and the lower embedded short steel column (4) are channel steel structures. The assembly round hole (9), the pre-installed elliptical hole (10), the installation round hole (26), and the pre-installed round hole (27) are respectively set on the web of the corresponding channel steel structure. When the vertically adjacent reinforced concrete wall (2) is assembled, the web of the upper embedded short steel column (3) and the web of the lower embedded short steel column (4) are in contact with each other.

7. The prefabricated hybrid coupled wall construction system without lateral support according to claim 6, characterized in that: At least two upper embedded short steel columns (3) and at least two lower embedded short steel columns (4) are respectively provided at the upper and lower ends of the reinforced concrete wall (2). Upper ring bars (6) are provided between adjacent upper embedded short steel columns (3) and lower ring bars (7) are provided between adjacent lower embedded short steel columns (4).

8. A method for installing a prefabricated hybrid coupled wall system without lateral support, characterized in that: Including the prefabricated hybrid coupled wall construction lateral support-free system as described in any one of claims 1-7, the installation steps include: Step 1: Transport the precast reinforced concrete wall (2) to the site; Step 2: Insert the lower positioning bar (14) of the assembled positioning device into the reserved hole (18) of the upper positioning bar of the lower reinforced concrete wall (2). After positioning the direction of the positioning device, put the limiting ring (29) into the prism section (28) so that the positioning frame (30) is supported by the lower embedded short steel column (4). Step 3: Hoist the upper reinforced concrete wall (2) to the top of the lower reinforced concrete wall (2), and gradually fit the lower positioning bar reserved hole (17) of the upper reinforced concrete wall (2) into the upper positioning bar (13) of the positioning device, so that the side reinforced concrete wall (2) slowly falls along the positioning device. Observe the hole marking line (11) on the upper embedded short steel column (3) and the lower embedded short steel column (4) for preliminary positioning. Step 4: After the hole marking lines on the upper embedded short steel column (3) and the lower embedded short steel column (4) are aligned, the bearing type connecting bolt (23) is inserted between the pre-installed elliptical hole (10) and the pre-installed round hole (27) between the lower embedded short steel column (4) of the upper side reinforced concrete wall (2) and the upper embedded short steel column (3) of the lower side reinforced concrete wall (2) to perform wall correction; Step 5: After the wall is corrected, high-strength friction type connecting bolts (22) and corresponding fastening nuts are inserted into the assembly round hole (9) and installation round hole (26) between the lower embedded short steel column (4) of the upper reinforced concrete wall (2) and the upper embedded short steel column (3) of the lower upper reinforced concrete wall (2) to connect and fix them. Step 6: Connect and tighten the initially inserted bearing-type connecting bolts (23); Step 7: Rotate the connecting sleeve (15) in the positioning steel bar assembly to pull out the limiting ring (29) from the prismatic section (28), disassemble and remove the positioning device; Step 8: When assembling the reinforced concrete wall (2) in the horizontal direction, connect the embedded steel beam (5) of the left reinforced concrete wall (2) with the embedded steel beam (5) of the right reinforced concrete wall (2) by connecting bolts and fastening nuts or by welding. Then fill the gap under the embedded steel beam (5) with aerated blocks or leave it as a door or window opening. Step 9: Hoist the precast composite floor slab (19) into place. The end of the precast composite floor slab (19) is left with a predetermined distance from the wall of the reinforced concrete wall (2). The embedded steel bars of the precast composite floor slab (19) extend into the pouring gap formed by the upper reinforced concrete wall (2) and the lower reinforced concrete wall (2) and are lower than the floor slab. Step 10: The gap between the end of the precast composite floor slab (19) and the reinforced concrete wall (2) in step 9 is supported and reinforced; Step 11: Repeat steps one through ten above to complete the construction of the entire prefabricated hybrid coupled wall system without lateral support. Step 12: Pour floor concrete. The concrete on the precast composite floor slab (19) flows into the gap between the upper reinforced concrete wall (2) and the lower reinforced concrete wall (2) by gravity. Vibrate and cure.

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