Construction method of vertical inserted bar structure with bottom structure in prefabricated special-shaped wall

Abstract

The invention discloses a construction method of a vertical inserted bar structure with a bottom structure in a prefabricated special-shaped wall. The vertical inserted bar structure includes a lower-layer precast concrete module, an upper-layer precast concrete module, vertical inserted bars connected to the top of the lower-layer precast concrete module and inserted into the grouting sleeves of the upper-layer precast concrete module, and a bottom structure arranged below the vertical inserted bars and located at the top of the lower-layer precast concrete module. Through the setting of the bottom structure, the groove at the bottom facilitates the adjustment of the verticality of the vertical inserted bars, ensuring that they can be quickly inserted into the grouting sleeve cavity at the bottom of the upper-layer precast concrete module. In addition, the bending and inclination adjustment occur within the groove structure at the bottom, and it will not prevent installation due to bending. At the same time, the bottom structure of the vertical inserted bars can realize the setting of the non-bonded section of the steel bars, which is conducive to completing the non-bonded treatment at the bottom of the inserted bars during the component production stage. In the non-bonded stage, it can effectively improve the deformation capacity and energy dissipation capacity of the joint area and enhance the seismic performance of the overall structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated buildings, and particularly relates to a construction method for a vertical inserted bar structure with a bottom structure in prefabricated special-shaped walls such as precast concrete module walls, precast L-shaped or T-shaped walls. Background Art

[0002] In prefabricated concrete structures, the connection between components is mainly the connection of steel bars, and the connection nodes need to meet the strength and deformation capacity requirements specified in the codes. At present, sleeve grouting connection is mostly used for the vertical steel bar connection of upper and lower layer walls in prefabricated concrete structures. However, there are also many pain points in sleeve grouting connection. Due to the cumulative errors in the processing of multi-dimensional special-shaped wall components and the installation at the construction site, when installing the upper component, it is very difficult for the lower inserted bars to be all inserted into the grouting sleeve cavity at one time, especially for special-shaped components such as precast concrete module walls, precast L-shaped or T-shaped walls. The influence of cumulative errors during the production of multi-dimensional components will cause deviations in the corresponding positions between the vertical inserted bars and the grouting sleeves of the upper components. During installation, the verticality of the vertical inserted bars needs to be adjusted to ensure that all vertical inserted bars are smoothly inserted into the sleeves, and at the same time ensure that the upper component can be installed to the design elevation.

[0003] Secondly, the vertical inserted bars of the lower component have a large diameter and a short exposed length, and it is relatively difficult to adjust the verticality. During installation, the upper component needs to be hoisted to a designated position and suspended, and the vertical inserted bars are adjusted depending on the position corresponding to the grouting sleeve. At the same time, on-site construction often uses oxyacetylene gas heating that does not meet the code requirements to process the vertical inserted bars. The above operations all have great safety and quality hazards. Even if the lower vertical inserted bars can be all inserted into the sleeves after being adjusted by tooling, the lower inserted bars are prone to form a bent shape during adjustment. The diameter of the cavity of the upper grouting sleeve is relatively small, only 5-10 mm larger than the diameter of the steel bars. The exposed part of the bent vertical inserted bars cannot be all inserted into the sleeve, which affects the installation of the upper component to the design elevation. At this time, the upper component needs to be hoisted again to re-adjust the vertical inserted bars. The construction is repeated and the efficiency is low, which does not give full play to the advantages of prefabricated structure construction and does not reflect the concept of industrialized construction. In addition, the connection area between the upper and lower layer walls of the prefabricated structure is a weak stress area, and the joint area is prone to damage under horizontal loads or earthquake actions. The setting of an unbonded section at the bottom of the vertical inserted bars can improve the deformation capacity of the joint structure under earthquake actions, which is beneficial to improving the overall seismic performance of the structure. Summary of the Invention

[0004] The present invention provides a construction method for a vertical inserted bar structure with a bottom structure in prefabricated special-shaped walls, so as to solve technical problems such as the precise connection, convenient construction of vertical inserted bars at prefabricated components, and unbonded setting at the connection.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The vertical dowel structure with bottom structure in the assembled special-shaped wall comprises a lower precast concrete module, an upper precast concrete module, a vertical dowel connected to the top of the lower precast concrete module and inserted into the grouting sleeve of the upper precast concrete module, and a bottom structure arranged below the vertical dowel and located at the top of the lower precast concrete module; the bottom structure is an arc groove structure or a cylindrical groove structure;

[0007] The construction method of vertical dowel structure with bottom structure in prefabricated special-shaped wall is applied, and the specific steps are as follows:

[0008] Step 1: split and deepen the precast components based on the design drawings, and divide the lower precast concrete modules and the upper precast concrete modules according to their relative positions;

[0009] Step 2: Make prefabricated components. First, tie and fix the steel cage, place the vertical steel bars and grouting sleeves, and insert the lower part of the vertical steel bars into the grouting sleeves below them by half their length; the lower prefabricated concrete module extends the upper part of the vertical steel bars to the top, and the extended section is the vertical dowel bar;

[0010] Step 3: Place the tied and fixed component steel bars into the steel mold, and fix the grouting sleeves and vertical steel bars on the sides of the mold according to the opening positions on the mold to prevent the vertical steel bars and grouting sleeves from shifting during concrete pouring;

[0011] Step 4: forming the bottom structure, processing and manufacturing the arc-shaped mold, inserting it into the bottom of the exposed vertical dowel of the lower precast concrete module and fixing it on the steel mold, the top of the arc-shaped mold is flush with the top surface of the lower precast concrete module; pouring concrete and curing, lifting and removing the mold after the concrete reaches the required strength, and taking out the arc-shaped mold at the same time, forming an arc-shaped groove structure at the bottom of the vertical dowel;

[0012] Or process and manufacture a large-diameter PVC pipe section, insert it into the bottom of the exposed vertical dowel at the top of the lower precast concrete module and fix it on the steel mold, so that the top of the large-diameter PVC pipe section is flush with the top surface of the lower precast concrete module; the contact surface between the PVC pipe section and the lower precast concrete module is tightly sealed to prevent leakage and blockage; pour concrete and maintain it, and after the concrete reaches the required strength, hoist and remove the mold, and at the same time take out the PVC pipe section to form a cylindrical groove structure at the bottom of the vertical dowel;

[0013] Step 5: After the production is completed, the prefabricated components are transported to the construction site for hoisting construction. Before construction, the exposed length and centerline position of the vertical dowels on the top of the lower prefabricated concrete module are re-measured, and the position of the vertical dowels relative to the centerline is adjusted according to the measurement results to ensure that the deviation of the centerline of the vertical dowels is controlled within 3mm compared with the design drawing;

[0014] Step 6: Hoist the upper precast concrete module to a position 20 mm - 30 mm above the vertical inserted steel bars and keep it stationary. Then, according to the position of the grouting sleeve at the bottom of the upper precast concrete module, correspondingly adjust the perpendicularity of the lower vertical inserted steel bars. If the relative position exceeds the misalignment range of the design error, bend the vertical inserted steel bars. When bending, ensure that the bent area of the vertical inserted steel bars at the bottom is within the corresponding groove to avoid bending outside the groove, which may affect the insertion of the vertical inserted steel bars into the grouting sleeve of the upper precast concrete module.

[0015] Step 7: Slowly lower the upper precast concrete module to ensure that all vertical inserted steel bars are smoothly inserted into the cavity of the grouting sleeve of the upper precast concrete module. Install the upper precast concrete module to the design elevation, and measure the elevation and perpendicularity of the precast component. After ensuring that it is within the allowable range of the specifications and design drawings, temporarily fix and support the precast component.

[0016] Step 8: Seal the bottom of the upper precast concrete module. After the sealing material reaches the required strength, grout the grouting sleeve. During grouting, since there is a gap between the upper and lower walls, the grouting material in the grouting sleeve will flow into the groove of the bottom structure to ensure that the groove is filled with grouting material. After the grouting material reaches the required strength, remove the temporary fixed support, and the construction of the vertical inserted steel bar structure with the bottom structure in the precast special-shaped wall is completed.

[0017] Further, in Step 1, after splitting and deepening, the vertical inserted steel bars are set at the corresponding position of the upper precast concrete module, which is the top of the lower precast concrete module. Only the grouting sleeve for the corresponding insertion of the vertical inserted steel bars is set at the bottom of the upper precast concrete module.

[0018] Further, the bottom structure is also an unbonded section. When processing the bottom structure in Step 4, fabricate a PVC pipe section with a diameter 8 mm - 15 mm larger than the diameter of the vertical inserted steel bars, sleeve it on the vertical inserted steel bars, and fix it at a position 2 - 3 times the diameter of the steel bars away from the side formwork at the top of the lower precast concrete module. Fill the gap between the PVC pipe section and the vertical inserted steel bars with a flexible filling material to prevent slurry leakage. Pour and cure the concrete. After the concrete reaches the required strength, hoist and remove the formwork. The PVC pipe section is buried at the bottom position of the vertical inserted steel bars, and the PVC pipe section is retained after form removal to form the unbonded section at the bottom of the vertical inserted steel bars.

[0019] Further, all the precast components are special-shaped walls. The lower precast concrete module is installed with three or four walls integrated, and the lower T-shaped wall or lower L-shaped wall is installed with two walls integrated. The upper precast concrete module is installed with three or four walls integrated, and the upper T-shaped wall or upper L-shaped wall is installed with two walls integrated.

[0020] Further, the vertical inserted steel bars on the lower T-shaped wall are arranged at intervals, and at least one vertical inserted steel bar is provided at the T-shaped junction of the lower T-shaped wall.

[0021] The vertical inserted bars on the upper L-shaped wall are arranged at intervals, and vertical inserted bars are symmetrically arranged at the corners of the upper L-shaped wall.

[0022] Furthermore, the horizontal section of the arc-shaped groove structure is arc-shaped, and the arc radius at the top is not greater than 40 mm, and the height of the arc-shaped groove is not less than 5 times the diameter of the vertical inserted bar; the radius of the cylindrical groove structure is not greater than 40 mm, and the height of the cylindrical groove structure is not less than 5 times the diameter of the vertical inserted bar.

[0023] Furthermore, the PVC pipe in the unbonded section remains in the wall and is not removed after form removal; the PVC pipe in the unbonded section is fixed to the steel reinforcement cage of the precast component by binding and the progress positioning is rechecked; the height of the unbonded section is 5 to 8 times the diameter of the vertical inserted bar.

[0024] Furthermore, the unbonded section is used for the structural load-bearing wall, and stress sensors and / or strain sensors are arranged on the surface of the steel reinforcement in its flexible filling material. The stress sensors and strain sensors on the same floor are connected in series and are both connected to the data acquisition terminal to monitor the stress and deformation of the structural steel reinforcement, and are used for early warning and monitoring of the stress and deformation of structural components under earthquake action.

[0025] The beneficial effects of the present invention are embodied in:

[0026] 1) Through the setting of the structure at the bottom of the vertical inserted bar of the present invention, especially the bottom groove is convenient for adjusting the verticality of the vertical inserted bar, ensuring that it can be quickly inserted into the grouting sleeve cavity at the bottom of the upper precast concrete module; secondly, the bending and inclination adjustment of the vertical inserted bar occurs in the bottom groove structure and will not affect the insertion of the exposed part into the grouting sleeve cavity, so as to ensure that the upper component can be smoothly installed to the design elevation, greatly improving the connection quality and connection efficiency between the upper and lower precast components;

[0027] 2) By setting the unbonded section at the bottom of the vertical inserted bar of the present invention, the unbonded treatment at the bottom of the inserted bar can be simply and conveniently completed during the component production stage. Compared with the connection node with bonding at the bottom of the inserted bar, the node adopting the unbonded stage at the bottom of the steel reinforcement can effectively improve the deformation capacity and energy dissipation capacity of the node area and improve the seismic performance of the overall structure;

[0028] 3) The node of the present invention does not increase the application cost compared with the traditional sleeve grouting node. Compared with the traditional scheme, it can reduce the component installation time and reduce the safety risk. Correspondingly, it can reduce the expenditure of construction site mechanical equipment and installation workers' expenses, and can reduce costs while ensuring safety, with obvious beneficial effects; at the same time, it can also realize the efficient, reliable and rapid connection of vertical steel bars between special-shaped precast components such as precast concrete module walls, precast L-shaped or T-shaped walls.

[0029] 4) On the basis of the traditional vertical steel bar sleeve grouting connection, the connection node of the present invention adopts different forms to increase different structures at the bottom of the inserted bars, improving the mechanical properties of the node at the design stage and completing the improvement of the easy adjustment and rapid installation of the connection between the inserted bars and the grouting sleeve at the construction stage, achieving a more efficient, convenient and reliable node connection quality compared with the traditional connection node.

[0030] The method of this application has the advantages of simple and convenient production, reliable, rapid and efficient steel bar connection quality, avoiding the disadvantages such as the difficulty of inserting the lower vertical inserted bars into the cavity of the upper grouting sleeve due to the production and construction errors of multi-dimensional special-shaped walls during installation, the short exposed length of the lower vertical inserted bars and the difficulty of verticality adjustment, realizing the rapid installation of components and the efficient connection of vertical steel bars, improving the connection quality and efficiency. In addition, the bottom structure of the vertical inserted bars can achieve unbonded treatment, which can effectively improve the deformation and energy dissipation capacity of the connection node and improve the overall seismic performance of the structure. This method can be used in structures such as precast concrete module walls, precast L-shaped or T-shaped walls, etc., and has broad application prospects. Other features and advantages of the present invention will be described in the following specification, and will be partially obvious from the specification, or understood by implementing the present invention; the main purpose and other advantages of the present invention can be achieved and obtained through the solutions specifically pointed out in the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a three-dimensional schematic diagram of the installation of precast components;

[0032] Figure 2 is a three-dimensional schematic diagram of the installation of the lower precast concrete module;

[0033] Figure 3 is a schematic diagram of the vertical inserted bar connection structure with an arc-shaped groove structure;

[0034] Figure 4 is a schematic diagram of the vertical inserted bar connection structure with a cylindrical groove structure;

[0035] Figure 5 is a schematic diagram of the vertical inserted bar connection structure with an unbonded section;

[0036] Figure 6 is a schematic diagram of the vertical inserted bar connection of a T-shaped wall Figure 1 ;

[0037] Figure 7 is a schematic diagram of the vertical inserted bar connection of a T-shaped wall Figure 2 ;

[0038] Figure 8 is a schematic diagram of the vertical inserted bar connection of an L-shaped wall Figure 1 ;

[0039] Figure 9Schematic diagram of vertical reinforcement connection of L-shaped wall Figure 2 。

[0040] Reference numerals: 1 - Lower precast concrete module, 2 - Upper precast concrete module, 3 - Vertical reinforcement, 4 - Arc-shaped groove structure, 5 - Cylindrical groove structure, 6 - Unbonded section, 7 - Lower T-shaped wall, 8 - Upper T-shaped wall, 9 - Grouting sleeve, 10 - Lower L-shaped wall, 11 - Upper L-shaped wall. Specific implementation manner

[0041] Taking the installation of prefabricated assembled wall as an example, as Figures 1 to 9 shown, the vertical reinforcement 3 node structure with bottom structure in the prefabricated structure includes a lower precast concrete module 1, an upper precast concrete module 2, a vertical reinforcement 3 connected to the top of the lower precast concrete module 1 and inserted into the grouting sleeve 9 of the upper precast concrete module 2, and a bottom structure disposed below the vertical reinforcement 3 and located at the top of the lower precast concrete module 1; the bottom structure is an arc-shaped groove structure 4 or a cylindrical groove structure 5.

[0042] Combined with Figures 6 to 9 shown, the precast component is a precast wall, the lower precast concrete module 1 is a straight wall, a lower T-shaped wall 7 or a lower L-shaped wall 10; the lower precast concrete module 1 is a straight wall, an upper T-shaped wall 8 or an upper L-shaped wall 11.

[0043] Among them, the vertical reinforcements 3 on the lower T-shaped wall 7 are arranged at intervals, and at least one vertical reinforcement 3 is arranged at the T-shaped intersection of the lower T-shaped wall 7; the vertical reinforcements 3 on the upper L-shaped wall 11 are arranged at intervals, and the vertical reinforcements 3 are symmetrically arranged at the corners of the upper L-shaped wall 11.

[0044] Combined with Figures 1 to 9 shown, the construction method of the vertical reinforcement structure with bottom structure in the prefabricated special-shaped wall is further described. The specific steps are as follows:

[0045] Step 1: Split and deepen the precast components based on the design drawings, and divide the lower precast concrete module 1 and the upper precast concrete module 2 according to the relative positions.

[0046] For Step 1, after splitting and deepening, the vertical reinforcement 3 is arranged at the corresponding position of the upper precast concrete module 2 at the top of the lower precast concrete module 1, and only the grouting sleeve 9 for the insertion of the corresponding vertical reinforcement 3 is provided at the bottom of the upper precast concrete module 2.

[0047] Step 2: Make prefabricated components. First, tie and fix the steel cage, place the vertical steel bars and grouting sleeves 9, and insert the lower part of the vertical steel bars into the grouting sleeves 9 below itself to half its length; the lower prefabricated concrete module 1 extends the upper part of the vertical steel bars out of the top, and the extended section is the vertical dowel bar 3.

[0048] Step 3: Place the bound and fixed component reinforcement into the steel mold, and fix the grouting sleeve 9 and the vertical reinforcement on the sides of the mold according to the opening positions on the mold to prevent the vertical reinforcement and the grouting sleeve 9 from shifting during concrete pouring.

[0049] Step 4: Form the bottom structure, such as Figure 3 As shown, an arc-shaped mold is processed and manufactured, which is inserted into the bottom of the exposed vertical reinforcement of the lower precast concrete module 1 and fixed on the steel mold, and the top of the arc-shaped mold is flush with the top surface of the lower precast concrete module 1; concrete is poured and cured, and after the concrete reaches the required strength, the mold is hoisted and removed, and the arc-shaped mold is taken out at the same time to form an arc-shaped groove structure 4 at the bottom of the vertical inserted reinforcement 3.

[0050] or Figure 4 As shown, a large-diameter PVC pipe section is processed and manufactured, and is inserted into the bottom of the exposed vertical dowel 3 on the top of the lower precast concrete module 1 and fixed on the steel mold. The top of the large-diameter PVC pipe section is flush with the top surface of the lower precast concrete module 1; the contact surface between the PVC pipe section and the lower precast concrete module 1 is tightly sealed to prevent leakage and blockage; concrete is poured and cured, and after the concrete reaches the required strength, the mold is removed by hoisting, and the PVC pipe section is taken out at the same time, forming a cylindrical groove structure 5 at the bottom of the vertical dowel 3.

[0051] Among them, the horizontal section of the arc-shaped groove structure 4 is an arc shape, and the arc radius of the top is not greater than 40 mm, and the height of the arc-shaped groove is not less than 5 times the diameter of the vertical dowel 3; the radius of the cylindrical groove structure 5 is not greater than 40 mm, and the height of the cylindrical groove structure 5 is not less than 5 times the diameter of the vertical dowel 3.

[0052] Step 5. After the production is completed, the prefabricated components are transported to the construction site for hoisting construction. Before construction, the exposed length and center line position of the vertical dowel bar 3 on the top of the lower prefabricated concrete module 1 are remeasured, and the vertical dowel bar 3 relative to the center line position is adjusted according to the measurement results to ensure that the center line deviation of the vertical dowel bar 3 is controlled within 3mm compared with the design drawing.

[0053] Step 6: Hoist the upper precast concrete module 2 to a position 20 mm - 30 mm above the vertical reinforcing bars 3 and keep it stationary. Then, according to the position of the grouting sleeve 9 at the bottom of the upper precast concrete module 2, correspondingly adjust the verticality of the lower vertical reinforcing bars 3. If the relative position exceeds the misalignment range of the design error, bend the vertical reinforcing bars 3. When bending, ensure that the bending area of the bottom structure of the vertical reinforcing bars 3 is within the corresponding groove to avoid bending outside the groove, which may affect the insertion of the vertical reinforcing bars 3 into the grouting sleeve 9 of the upper precast concrete module 2.

[0054] Step 7: Slowly lower the upper precast concrete module 2 to ensure that all the vertical reinforcing bars 3 are smoothly inserted into the cavity of the grouting sleeve 9 of the upper precast concrete module 2. Install the upper precast concrete module 2 to the design elevation, and measure the elevation and verticality of the precast component. After ensuring that it is within the allowable range of the specification and design drawings, temporarily fix and support the precast component.

[0055] Step 8: Seal the bottom of the upper precast concrete module 2. After the sealing material reaches the required strength, grout the grouting sleeve 9. During grouting, since there is a gap between the upper and lower walls, the grouting material in the grouting sleeve 9 will flow into the groove of the bottom structure to ensure that the groove is filled with grouting material. After the grouting material reaches the required strength, remove the temporary fixed support, and the construction of the joint structure of the vertical reinforcing bars 3 with the bottom structure in the prefabricated structure is completed.

[0056] As another application example of Step 4, as Figure 5 shown, the bottom structure is also an unbonded section 6. When processing the bottom structure in Step 4, fabricate a PVC pipe section with a diameter 8 mm - 15 mm larger than that of the vertical reinforcing bars 3, sleeve it on the vertical reinforcing bars 3 and fix it at a position 2 - 3 times the diameter of the reinforcing bars away from the side formwork at the top of the lower precast concrete module 1. Fill the gap between the PVC pipe section and the vertical reinforcing bars 3 with a flexible filling material to prevent grout leakage. Pour and cure the concrete. After the concrete reaches the required strength, hoist and remove the formwork. The PVC pipe section is buried at the bottom position of the vertical reinforcing bars 3, and the PVC pipe section is retained after form removal to form the unbonded section 6 at the bottom of the vertical reinforcing bars 3. In addition, the PVC pipe of the unbonded section 6 remains in the wall and is not removed after form removal. The PVC pipe of the unbonded section 6 is fixed to the steel cage of the precast component by binding and the progress is located and reviewed. The height of the unbonded section 6 is 5 to 8 times the diameter of the vertical reinforcing bars 3.

[0057] Among them, the unbonded section 6 is used at the structural load-bearing wall. Stress sensors and / or strain sensors are arranged on the surface of the reinforcing bars inside the flexible filling material. The stress sensors and strain sensors on the same floor are connected in series and are all connected to the data acquisition terminal to monitor the stress and deformation of the structural reinforcing bars, and are used for early warning and monitoring of the stress and deformation of structural components under earthquake action.

[0058] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. Construction method of vertical inserted bar structure with bottom structure in prefabricated special-shaped wall, characterized in that, The vertical dowel structure containing the bottom structure in the assembled special-shaped wall comprises a lower precast concrete module (1), an upper precast concrete module (2), a vertical dowel (3) connected to the top of the lower precast concrete module (1) and inserted into the grouting sleeve (9) of the upper precast concrete module (2), and a bottom structure arranged below the vertical dowel (3) and located at the top of the lower precast concrete module (1); the bottom structure is an arc-shaped groove structure (4) or a cylindrical groove structure (5); The construction method of vertical dowel structure with bottom structure in prefabricated special-shaped wall is applied, and the specific steps are as follows: Step 1: split and deepen the precast components based on the design drawings, and divide the lower precast concrete module (1) and the upper precast concrete module (2) according to their relative positions; Step 2: Making prefabricated components, first tying and fixing the steel cage, placing the vertical steel bars and the grouting sleeve (9), and inserting the lower part of the vertical steel bars into the grouting sleeve (9) below the lower part to half of its length; wherein the lower prefabricated concrete module (1) extends the upper part of the vertical steel bars to the top, and the extended section is the vertical dowel bar (3); Step 3: Place the bound and fixed component steel bars into the steel mold, and fix the grouting sleeve (9) and the vertical steel bars on the sides of the mold according to the positions of the holes on the mold to prevent the vertical steel bars and the grouting sleeve (9) from shifting during concrete pouring; Step 4: forming a bottom structure, processing and manufacturing an arc-shaped mold, inserting it into the bottom of the exposed vertical dowel (3) of the lower precast concrete module (1) and fixing it on the steel mold, with the top of the arc-shaped mold flush with the top surface of the lower precast concrete module (1); pouring concrete and curing, and after the concrete reaches the required strength, hoisting and removing the mold, while taking out the arc-shaped mold, forming an arc-shaped groove structure (4) at the bottom of the vertical dowel (3); Or a large-diameter PVC pipe section is processed and manufactured, and is inserted into the bottom of the exposed vertical dowel (3) on the top of the lower precast concrete module (1) and fixed on the steel mold, so that the top of the large-diameter PVC pipe section is flush with the top surface of the lower precast concrete module (1); the contact surface between the PVC pipe section and the lower precast concrete module (1) is tightly sealed to prevent leakage and blockage; concrete is poured and cured, and after the concrete reaches the required strength, the mold is removed by hoisting, and the PVC pipe section is taken out at the same time, forming a cylindrical groove structure (5) at the bottom of the vertical dowel (3); The arc-shaped groove structure (4) has an arc-shaped horizontal section, and the arc radius at the top is not greater than 40 mm, and the arc-shaped groove height is not less than 5 times the diameter of the vertical dowel (3); The radius of the cylindrical groove structure (5) is not greater than 40 mm, and the height of the cylindrical groove structure (5) is not less than 5 times the diameter of the vertical dowel (3); Step 5: After the production is completed, the prefabricated components are transported to the construction site for hoisting construction. Before construction, the exposed length and centerline position of the vertical dowel bar (3) at the top of the lower prefabricated concrete module (1) are re-measured, and the position of the vertical dowel bar (3) relative to the centerline is adjusted according to the measurement results to ensure that the centerline deviation of the vertical dowel bar (3) is controlled within 3 mm compared with the design drawing; Step 6: Hoist the upper precast concrete module (2) and keep it stationary 20 mm - 30 mm above the vertical reinforcement bars (3). Then, adjust the verticality of the lower vertical reinforcement bars (3) according to the position of the grouting sleeve (9) at the bottom of the upper precast concrete module (2). If the relative position exceeds the misalignment range of the design error, bend the vertical reinforcement bars (3). When bending, ensure that the bent area of the vertical reinforcement bars (3) at the bottom is within the corresponding groove to avoid bending outside the groove, which may affect the insertion of the vertical reinforcement bars (3) into the grouting sleeve (9) of the upper precast concrete module (2). Step 7: Slowly lower the upper precast concrete module (2) to ensure that all vertical reinforcement bars (3) are smoothly inserted into the cavity of the grouting sleeve (9) of the upper precast concrete module (2). Install the upper precast concrete module (2) to the design elevation, and measure the elevation and verticality of the precast component. After ensuring that it is within the allowable range of the specifications and design drawings, temporarily fix and support the precast component. Step 8: Seal the bottom of the upper precast concrete module (2). After the sealing material reaches the required strength, grout the grouting sleeve (9). During grouting, since there is a gap between the upper and lower walls, the grouting material in the grouting sleeve (9) will flow into the groove of the bottom structure to ensure that the groove is filled with grouting material. After the grouting material reaches the required strength, remove the temporary fixing support, and the construction of the vertical reinforcement structure with the bottom structure in the assembled special-shaped wall is completed.

2. The construction method of the vertical inserted bar structure with a bottom structure in the prefabricated special-shaped wall as described in claim 1, characterized in that, For Step 1, after splitting and deepening, the vertical reinforcement bars (3) are arranged at the corresponding position of the upper precast concrete module (2) at the top of the lower precast concrete module (1), and only the grouting sleeve (9) for the insertion of the corresponding vertical reinforcement bars (3) is provided at the bottom of the upper precast concrete module (2).

3. The construction method of the vertical inserted bar structure with a bottom structure in the prefabricated special-shaped wall as described in claim 1, characterized in that, All the precast components are special-shaped walls. The lower precast concrete module (1) is installed with three or four walls integrated, and the lower T-shaped wall (7) or the lower L-shaped wall (10) is installed with two walls integrated. The upper precast concrete module (2) is installed with three or four walls integrated, and the upper T-shaped wall (8) or the upper L-shaped wall (11) is installed with two walls integrated.

4. The construction method of the vertical inserted bar structure with a bottom structure in the prefabricated special-shaped wall according to claim 3, characterized in that The vertical reinforcement bars (3) on the lower T-shaped wall (7) are arranged at intervals, and at least one vertical reinforcement bar (3) is provided at the T-shaped junction of the lower T-shaped wall (7). The vertical reinforcement bars (3) on the upper L-shaped wall (11) are arranged at intervals, and the vertical reinforcement bars (3) are symmetrically arranged at the corners of the upper L-shaped wall (11).

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