Construction structure and construction method of secondary structure assembly type wall pier

Abstract

The invention discloses a construction structure and a construction method of a secondary structure assembly type wall pier, the construction structure comprises an assembly type wall pier, a shear wall, a top plate, a bottom plate, a screw rod component and a clamping piece, the side edge of the assembly type wall pier is connected with the shear wall through the screw rod component, and the upper part of the assembly type wall pier is connected with the top plate through the clamping piece; and a triangular wooden wedge is arranged between the lower part of the fabricated wall pier and the bottom plate. The prefabricated wall pier has the beneficial effects that the prefabricated wall pier is adopted and prefabricated in advance, the reinforcing nut is pre-embedded in the main body structure in advance, the PVC sleeve is pre-embedded in the prefabricated wall pier, and during secondary structure construction, the PVC sleeve of the prefabricated wall pier is aligned with the pre-embedded nut of the main body structure and is connected with the pre-embedded nut of the main body structure through the harness cord screw; a gasket and a fastening nut are screwed and reinforced in a horn mouth on the outer side of the assembly type wall pier, a bedding mode is adopted for fixing a floor, and a U-shaped clamp and a shoot nail are adopted for reinforcing the bottom of a beam plate; the problems that the formwork is difficult to reinforce, time-consuming and labor-consuming during construction of the small door buttress are solved; site construction is convenient, and the construction period is shortened.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a construction structure and construction method for a secondary structure prefabricated wall pier. Background Technology

[0002] Currently, secondary structural wall piers are mainly constructed by either bringing out the primary structure or by casting the secondary structure with formwork. Existing conventional construction methods have obvious defects: First, when the size of the small wall piers is ≤100mm and the main body uses wooden formwork, the construction is difficult and the cycle is long; second, the small size of the components makes it difficult to reinforce the formwork and requires a lot of labor; third, problems such as formwork bulging and insufficient compaction are prone to occur, resulting in poor appearance and structural quality.

[0003] Therefore, it is necessary to propose a construction structure and construction method for a secondary prefabricated wall pier. Summary of the Invention

[0004] To address the shortcomings of the existing technology, the present invention aims to provide a construction structure and method for a prefabricated secondary structure wall pier, which is convenient for on-site construction, saves construction time, and produces good molding quality. By adopting the form of prefabricated wall pier, construction efficiency and economic benefits are improved.

[0005] A construction structure for a secondary prefabricated wall pier includes a prefabricated wall pier, a shear wall, a top plate, a bottom plate, bolt members, and fasteners. The sides of the prefabricated wall pier are connected to the shear wall via bolt members, the upper part of the prefabricated wall pier is connected to the top plate via fasteners, and a triangular wooden wedge is provided between the lower part of the prefabricated wall pier and the bottom plate.

[0006] The screw assembly includes a pre-embedded nut, a through-threaded screw, a PVC sleeve, a washer, and a fastening nut. The pre-embedded nut is embedded in the shear wall, the PVC sleeve is embedded in the prefabricated wall pier, one end of the through-threaded screw is connected to the pre-embedded nut, and the fastening nut is threadedly connected to the other end of the copper wire screw through a washer.

[0007] A reinforcing rod extends from the circumference of the pre-embedded nut, and a reinforcing rib connects the circumference of the pre-embedded nut and the reinforcing rod.

[0008] The prefabricated wall piers have flared ends at the outer ends of the PVC sleeves.

[0009] The fastener includes a U-shaped clip and a nail. One end of the nail is installed in the middle of the U-shaped clip, and both ends of the U-shaped clip are clamped to the prefabricated wall pier. The other end of the nail is inserted into the top plate.

[0010] The inside of the U-shaped card has several protrusions.

[0011] The gap between the U-shaped clip and the prefabricated wall pier is filled with special adhesive mortar, and the gap between the prefabricated wall pier and the base plate is filled with concrete mortar.

[0012] The nails are equipped with barbs.

[0013] A construction method for a secondary structure prefabricated wall pier. S1. When pouring concrete, the shear wall of the small gatepost should have pre-embedded nuts. S2. Prefabricated precast wall piers are fabricated on-site using standardized molds. The reinforcement and concrete wall piers are not less than the design requirements in the drawings, and PVC sleeves should be reserved at the corresponding positions according to the height of the embedded nuts. A flared opening is set on one side of the precast wall pier to facilitate subsequent reinforcement. S3. The exact position of the prefabricated wall piers should be marked on site according to the construction drawings. When laying out the lines, special attention should be paid to the height of the door openings and lintels to ensure that the prefabricated wall piers are accurately aligned with the door openings after installation. S4. During installation, clean the base layer of the door jamb. After cleaning, use a trowel to continuously lay mortar in strips along the marked lines, with the width slightly wider than the wall panel thickness. The mortar strips should have a trapezoidal cross-section (narrower at the top and wider at the bottom) to facilitate the compaction of the wall panels. The length of each single laying should not exceed 2m. Lay the mortar and install the panels immediately to avoid the mortar from drying out. The thickness of the mortar bedding layer should be 15-20mm. If it is too thin, it will easily crack. If it is too thick, it will affect the adjustment. Place triangular wooden wedges on both sides of the base plate in advance. They need to be removed 5 days after completion. Use nails to fix a U-shaped clip at the top plate position. S5. Adhere the prefabricated wall pier to the design position using special adhesive mortar, and use threaded rods to reinforce and fix it to the shear wall. The inner end of the threaded rod is connected to the pre-embedded nut, and the outer end of the threaded rod is tightened with a washer and nut at the flared position of the prefabricated wall pier. S6. Sealing: After the prefabricated wall pier is installed, the end of the flared opening is sealed with 1:2 cement mortar.

[0014] Compared with existing technologies, the present invention has the following advantages: It employs prefabricated wall piers, with pre-embedded reinforcing nuts in the main structure and PVC sleeves embedded in the prefabricated wall piers. During secondary structure construction, the PVC sleeves of the prefabricated wall piers are aligned with the pre-embedded nuts in the main structure and connected using a single threaded rod. Washers and fastening nuts are used to reinforce the piers at the outer flared opening. Floor fixing utilizes a grouting method, and the bottom of beams and slabs is reinforced using U-shaped clips and nails. This solves the problems of difficult, time-consuming, and labor-intensive formwork reinforcement during the construction of small door piers; on-site construction is convenient and saves time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the connection between the prefabricated wall pier and the shear wall of the present invention; Figure 2 This is a schematic diagram of the connection between the prefabricated wall pier and the roof plate of the present invention; Figure 3This is a schematic diagram of the connection between the prefabricated wall pier and the base plate of the present invention; Figure 4 This is a structural diagram of the screw component of the present invention; Figure 5 This is a structural diagram of the pre-embedded nut of the present invention; Figure 6 This is a structural diagram of the card component of the present invention.

[0016] The attached diagram contains the following labels: 1. Prefabricated wall pier; 2. Shear wall; 3. Top plate; 4. PVC sleeve; 5. Gasket; 6. Fastening nut; 7. Base plate; 8. Screw member; 9. Clip; 10. Triangular wooden wedge; 11. Embedded nut; 12. Through threaded rod; 13. Reinforcing rod; 14. Reinforcing rib; 15. Flared mouth; 16. U-shaped clip; 17. Nail; 18. Protrusion; 19. Special bonding mortar; 20. Concrete mortar; 21. Barb. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0021] like Figure 1 and combined Figures 2 to 6 As shown, a construction structure for a secondary prefabricated wall pier includes a prefabricated wall pier 1, a shear wall 2, a top plate 3, a bottom plate 7, a screw member 8, and a fastener 9. The side of the prefabricated wall pier 1 is connected to the shear wall 2 through the screw member 8, the upper part of the prefabricated wall pier 1 is connected to the top plate 3 through the fastener 9, and a triangular wooden wedge 10 is provided between the lower part of the prefabricated wall pier 1 and the bottom plate 7.

[0022] The screw component 8 includes a pre-embedded nut 11, a through-threaded screw 12, a PVC sleeve 4, a washer 5, and a fastening nut 6. The pre-embedded nut 11 is pre-embedded in the shear wall 2, the PVC sleeve 4 is pre-embedded in the prefabricated wall pier 1, one end of the through-threaded screw 12 is connected to the pre-embedded nut 11, and the fastening nut 6 is threadedly connected to the other end of the through-threaded screw 12 through the washer 5.

[0023] A reinforcing rod 13 extends from the circumference of the pre-embedded nut 11, and a reinforcing rib 14 connects the circumference of the pre-embedded nut 11 and the reinforcing rod 13.

[0024] The prefabricated wall pier 1 has a flared opening 15 at the outer end of the PVC sleeve 4.

[0025] The clip 9 includes a U-shaped clip 16 and a nail 17. One end of the nail 17 is installed in the middle of the U-shaped clip 16, and both ends of the U-shaped clip 16 are clamped to the prefabricated wall pier 1. The other end of the nail 17 is inserted into the top plate 3.

[0026] The inner side of the U-shaped card 16 is provided with several protrusions 18, which improve the bonding strength between the U-shaped card 16 and the special adhesive mortar 19.

[0027] The gap between the U-shaped clip 16 and the prefabricated wall pier 1 is filled with special adhesive mortar 19, and the gap between the prefabricated wall pier 1 and the base plate 7 is filled with concrete mortar 20.

[0028] The nail 17 is provided with barbs 21, which improves the connection strength between the nail 17 and the top plate 3.

[0029] Construction method of a secondary structure prefabricated wall pier S1. During concrete pouring, pre-embedded nuts 11 should be pre-embedded in the shear wall 2 of the small gatepost. S2. The prefabricated wallpost 1 should be prefabricated on-site using standardized molds. The reinforcement and concrete wallpost should not be less than the design requirements in the drawings. PVC sleeves 4 should be reserved at the corresponding positions of the pre-embedded nuts 11. A flared opening 15 should be provided on one side of the prefabricated wallpost 1 for subsequent reinforcement. S3. The accurate position of the prefabricated wallpost 1 should be marked on-site according to the construction drawings. Special attention should be paid to the height of the door opening and lintel during the layout to ensure that the prefabricated wallpost 1 accurately corresponds to the door opening after installation. S4. During installation, the base layer of the gatepost should be cleaned. After cleaning, mortar should be continuously laid in strips along the marked lines using a trowel, with a width slightly wider than the wall panel thickness. The mortar strip cross-section should be trapezoidal. (Narrower at the top and wider at the bottom) to facilitate the compaction of the wall panels; the length of a single laying should not exceed 2m, and the panels should be installed as they are laid to avoid the mortar from drying. The thickness of the mortar layer should be 15-20mm. If it is too thin, it will easily crack, and if it is too thick, it will affect the adjustment. Triangular wooden wedges 10 should be placed on both sides of the bottom plate 7 in advance and should be removed 5 days after completion. A U-shaped clip 16 should be fixed at the position of the top plate 3 with nails 17; S5, the prefabricated wall pier 1 is pasted to the design position with special adhesive mortar 19, and the threaded rod 12 is used to reinforce the shear wall 2. The inner end of the threaded rod 12 is connected to the pre-embedded nut 11, and the outer end of the threaded rod 12 is tightened at the flared mouth 15 position of the prefabricated wall pier 1 with a washer 5 and a fastening nut 6; S6, sealing, after the prefabricated wall pier 1 is installed, the end of the flared mouth 15 is sealed with 1:2 cement mortar.

[0030] Compared with the prior art, the present invention has the following advantages: It adopts a prefabricated wall pier 1, which is prefabricated in advance, with reinforcing nuts pre-embedded in the main structure. A PVC sleeve 4 is pre-embedded in the prefabricated wall pier 1. During secondary structure construction, the PVC sleeve 4 of the prefabricated wall pier 1 is aligned with the pre-embedded nuts 11 in the main structure and connected by a threaded rod 12. A washer 5 and a fastening nut 6 are tightened and reinforced inside the flared opening 15 on the outside of the prefabricated wall pier 1. The floor is fixed using a grouting method, and the bottom of the beams and slabs is reinforced using U-shaped clips 16 and nails 17. This solves the problems of difficult, time-consuming, and labor-intensive formwork reinforcement during the construction of small door piers; on-site construction is convenient and saves construction time.

[0031] Example 1: Construction of a small wall pier for the entrance door in a residential building This embodiment describes a high-rise residential project. Small wall piers are installed on both sides of the entrance doorway. The wall piers are designed to measure 80mm × 200mm (thickness × height), and the concrete strength grade is C25. The original design for this area used secondary structure formwork casting. However, because the wall pier thickness is ≤100mm, there were problems with formwork reinforcement and easy formwork bulging. Therefore, the secondary structure prefabricated wall pier construction structure and method described in this invention were adopted for construction.

[0032] Core component selection: The prefabricated wall pier 1 is prefabricated using standardized molds, with an internal Φ8@150 double-layer steel mesh and a pre-embedded Φ50 PVC sleeve 4 (corresponding to the M12 through-threaded rod 12); the pre-embedded nut 11 is an M12 pre-embedded welded nut, with three Φ10 reinforcing rods 13 extending from its circumference, each 150mm long, and three triangular reinforcing ribs 14 welded to the circumference of the nut; the clamp 9 is a U-shaped carbon steel clamp 16 with an opening size of 80mm, with three anti-slip protrusions 18 spaced 20mm apart on the inside, and a 50mm long barbed nail 17 is selected to match; the triangular wooden wedge 10 is a solid wood wedge block with a cross section of 30mm×30mm.

[0033] Connection structure: The side of the prefabricated wall pier 1 is connected to the shear wall 2 by two sets of bolt members 8 with a vertical spacing of 500mm. The upper part is connected to the top plate 3 (floor slab thickness 120mm) by two symmetrically arranged clips 9. The lower part is connected to the bottom plate 7 (floor slab) by two symmetrical triangular wooden wedges 10. The U-shaped clip 16 and the prefabricated wall pier 1 are filled with special bonding mortar 19 (strength grade M15). The gap between the wall pier and the bottom plate 7 is filled with C25 concrete mortar 20.

[0034] Construction methods S1: During the shear wall 2 pouring stage, M12 pre-embedded nuts 11 are pre-embedded at the corresponding wall pier installation positions on both sides of the entrance door opening, with a spacing of 500mm between the upper and lower sets. Ensure the center of the nuts is aligned with the center of the PVC sleeve 4 of the wall pier, with a deviation controlled within ±3mm. S2: The prefabricated wall pier 1 is fabricated on-site using steel molding molds. After the reinforcement is tied, Φ50 PVC sleeve 4 is installed, with a flared end 15 (80mm diameter, 30mm depth) reserved at the outer end of the sleeve. After pouring C25 concrete and curing for 7 days, the concrete is shipped out after the strength test shows it meets the standard. S3: On-site layout: Mark the center line of the entrance door opening and the edge line of the wall pier according to the construction drawings. Pay special attention to checking the height of the door opening (2100mm) and the bottom elevation of the lintel, ensuring the top of the wall pier fits snugly against the bottom of the lintel. The layout deviation is controlled within ±2mm. S4: Clean the base layer, remove the laitance and debris from the connection surface of the base plate 7 and shear wall 2, moisten with clean water and let dry; lay strip-shaped special bonding mortar 19 along the marked line, the mortar strip is 100mm wide (slightly wider than the wall thickness of 80mm), the cross section is trapezoidal (30mm narrow at the top and 50mm wide at the bottom), the length of a single laying is 1.5m (less than 2m), and the thickness of the mortar layer is controlled at 18mm; place triangular wooden wedges 10 symmetrically on both sides of the wall pier of the base plate 7, and fix U-shaped clips 16 with a nail gun at the corresponding position of the top plate 3 on the upper part of the wall pier. S5: Hoist the prefabricated assembled wall pier 1 to the designed position, adjust the verticality (deviation ≤3mm / m), and use an M12 threaded rod 12 to connect the wall pier PVC sleeve 4 to the pre-embedded nut 11 of the shear wall 2. Install the washer 5 (50mm in diameter) and the fastening nut 6 in sequence at the wall pier flared opening 15, and tighten with a torque wrench (torque value controlled at 45N・m) to ensure a firm connection. S6: Sealing treatment. Five days after the wall pier is installed, remove the triangular wooden wedge 10, fill the gap of the base plate 7 with C25 concrete mortar 20 and vibrate to compact it; seal the inside of the flared opening 15 with 1:2 cement mortar (with an appropriate amount of waterproofing agent added), smooth and polish the surface, and make it flush with the wall pier surface.

[0035] In this embodiment, the construction cycle is only 8 hours per wall pier, which shortens the construction period by 60% compared with the traditional formwork and pouring process. After the wall pier is formed, the verticality deviation is ≤2mm / m, the surface is flat and smooth, and there are no defects such as bulging or honeycomb pitting. After testing, the pull-out strength of the connection between the wall pier and shear wall 2 meets the standard and meets the safety requirements of the residential structure. The labor required is reduced by 40% compared with the traditional process, and the economic benefits are significant.

[0036] Example 2: Construction of the wall pier at the doorway of an office building corridor This embodiment describes the construction of the wall piers for the main corridor entrance of an office building. The wall piers on both sides of the entrance are designed to measure 100mm × 2400mm (thickness × height), and the concrete strength grade is C30. The construction schedule for the corridor area of ​​this project is tight, and traditional secondary structure pouring techniques are insufficient to meet the schedule requirements. Furthermore, the aesthetic quality of the wall piers must be guaranteed to match the interior decoration standards; therefore, the technical solution of this invention is adopted.

[0037] Core component selection: The prefabricated wall pier 1 is made of C30 concrete, with an internal double-layer steel mesh of Φ10@120 and a pre-embedded Φ63 PVC sleeve 4 (corresponding to the through thread rod 12 of specification M16); the pre-embedded nut 11 is an M16 pre-embedded nut 11, with 4 Φ12 reinforcing rods 13 extending 200mm in length around the circumference, and the reinforcing rib 14 is made of thickened steel plate (thickness 8mm); the clamp 9 is a U-shaped stainless steel clamp 16 with an opening size of 100mm, with 4 anti-slip protrusions 18 spaced 25mm apart on the inside, and is matched with a high-strength barbed nail 17 with a length of 60mm; the triangular wooden wedge 10 is a 40mm×40mm anti-corrosion solid wood wedge block.

[0038] Connection structure: The side of the prefabricated wall pier 1 is connected to the shear wall 2 by three sets of bolt members 8 with a vertical spacing of 600mm. The upper part is connected to the top plate 3 (floor slab thickness 150mm) by two clips 9 with a spacing of 300mm. The lower part is set with three evenly distributed triangular wooden wedges 10 between the wall pier and the bottom plate 7. The gap between the U-shaped clip 16 and the wall pier is filled with M15 special bonding mortar 19, and the gap between the wall pier and the bottom plate 7 is filled with C30 fine stone concrete mortar 20.

[0039] Construction methods S1: During the pouring of shear wall 2, three sets of M16 pre-embedded nuts 11, spaced 600mm apart vertically, are pre-embedded at the wall pier installation positions on both sides of the corridor doorway. Positioning fixtures are used to fix the nuts, ensuring that the nut axis coincides with the axis of the PVC sleeve 4 of the wall pier, with a deviation ≤2mm. S2: The prefabricated wall pier 1 is manufactured in a factory using all-steel molds (factory prefabrication is more efficient due to the large project volume). After the reinforcement is tied, the Φ63 PVC sleeve 4 is precisely installed, with a flared end 15 (100mm diameter, 40mm depth) at the outer end of the sleeve. After pouring C30 concrete, it undergoes standard curing for 14 days. After passing the strength test (compressive strength ≥28MPa), it is transported to the site. S3: On-site layout: Mark the doorway edge line and wall pier positioning line according to the decoration drawings. Pay special attention to the connection between the doorway height (2400mm) and the ceiling elevation to ensure that the top of the wall pier does not affect the ceiling installation. After the layout is completed, use ink lines to mark clear lines. S4: Base treatment. Use a high-pressure water gun to clean debris from the connection surfaces of the base plate 7 and shear wall 2. After drying, apply an interface agent to enhance adhesion. Lay strips of special bonding mortar 19 along the marked lines. The mortar strips are 120mm wide and trapezoidal in cross-section (40mm narrow at the top and 60mm wide at the bottom). The length of each laying is 1.8m, and the thickness of the mortar layer is controlled at 20mm. Place three triangular wooden wedges 10 evenly under the wall pier of the base plate 7. Fix U-shaped clips 16 with a high-strength nail gun at the corresponding position on the top plate 3 above the wall pier. S5: Hoist the precast wall pier 1 into place. Use a straightedge to correct the verticality (deviation ≤2mm / m). Use an M16 threaded rod 12 to pass through the PVC sleeve 4 and connect to the pre-embedded nut 11. Install a thickened washer 5 (60mm in diameter) and a fastening nut 6 at the flared end 15. Control the tightening torque to 60N・m to ensure a reliable connection without loosening. S6: Sealing construction. Seven days after the wall pier is installed, remove the triangular wooden wedge 10 and pour C30 fine stone concrete mortar 20 into the gap of the base plate 7. Use a micro vibrator to compact it. The flared opening 15 is sealed with 1:2 cement mortar and the surface is sanded smooth to ensure that the flatness deviation with the wall pier surface is ≤2mm.

[0040] In this embodiment, the construction period for a single doorway wall pier is only 10 hours, which is 55% shorter than the traditional process, meeting the tight schedule requirements of the project. The wall pier has excellent forming quality, and its verticality and flatness meet the standards of fine decoration, eliminating the need for secondary plastering and rectification. The connection nodes are firm, and no deformation or loosening was found in the on-site impact resistance test. Labor costs are reduced by 35%, while template waste is also reduced, taking into account both economic benefits and environmental protection requirements.

[0041] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A construction structure of a secondary structure assembled wall pile, characterized by: It includes a prefabricated wall pier (1), a shear wall (2), a top plate (3), a bottom plate (7), a screw component (8), and a fastener (9). The side of the prefabricated wall pier (1) is connected to the shear wall (2) through the screw component (8). The upper part of the prefabricated wall pier (1) is connected to the top plate (3) through the fastener (9). A triangular wooden wedge (10) is provided between the lower part of the prefabricated wall pier (1) and the bottom plate (7).

2. A construction structure of a secondary structure assembled wall pier according to claim 1, characterized in that: The screw component (8) includes a pre-embedded nut (11), a through-thread screw (12), a PVC sleeve (4), a washer (5), and a fastening nut (6). The pre-embedded nut (11) is pre-embedded in the shear wall (2), the PVC sleeve (4) is pre-embedded in the prefabricated wall pier (1), one end of the through-thread screw (12) is connected to the pre-embedded nut (11), and the fastening nut (6) is threadedly connected to the other end of the through-thread screw (12) through the washer (5).

3. A construction structure of a secondary structure assembled wall pier according to claim 2, characterized in that: The circumference of the pre-embedded nut (11) extends with a reinforcing rod (13), and a reinforcing rib (14) is connected between the circumference of the pre-embedded nut (11) and the reinforcing rod (13).

4. A construction structure of a secondary structure assembled wall pier according to claim 3, characterized in that: The prefabricated wall pier (1) has a flared mouth (15) at the outer end of the PVC sleeve (4).

5. The construction structure of a secondary prefabricated wall pier as described in claim 4, characterized in that: The clip (9) includes a U-shaped clip (16) and a nail (17). One end of the nail (17) is installed in the middle of the U-shaped clip (16), and both ends of the U-shaped clip (16) are clamped to the prefabricated wall pier (1). The other end of the nail (17) is inserted into the top plate (3).

6. The construction structure of a secondary prefabricated wall pier as described in claim 5, characterized in that: The U-shaped card (16) has several protrusions (18) on its inner side.

7. The construction structure of a secondary prefabricated wall pier as described in claim 6, characterized in that: The gap between the U-shaped clip (16) and the prefabricated wall pier (1) is filled with special adhesive mortar (19), and the gap between the prefabricated wall pier (1) and the base plate (7) is filled with concrete mortar (20).

8. The construction structure of a secondary prefabricated wall pier as described in claim 7, characterized in that: The nail (17) is provided with barbs (21).

9. A construction method for a secondary structure prefabricated wall pier as described in any one of claims 1-8, characterized in that: S1. When pouring concrete, the shear wall of the small gatepost should have pre-embedded nuts. S2. Prefabricated precast wall piers are fabricated on-site using standardized molds. The reinforcement and concrete wall piers are not less than the design requirements in the drawings, and PVC sleeves should be reserved at the corresponding positions according to the height of the embedded nuts. A flared opening is set on one side of the precast wall pier to facilitate subsequent reinforcement. S3. The exact position of the prefabricated wall piers should be marked on site according to the construction drawings. When laying out the lines, special attention should be paid to the height of the door openings and lintels to ensure that the prefabricated wall piers are accurately aligned with the door openings after installation. S4. During installation, clean the base layer of the door jamb thoroughly. After cleaning, use a trowel to continuously lay mortar in strips along the marked lines, with the width slightly wider than the wall panel thickness. The mortar strips should have a trapezoidal cross-section to facilitate compaction of the wall panels. The length of each single laying should not exceed 2m. Lay the mortar and install the panels immediately to avoid mortar drying. The thickness of the mortar bedding layer should be 15-20mm. Too thin and it will easily crack, too thick and it will affect adjustment. Place triangular wooden wedges on both sides of the base plate in advance, and remove them 5 days after completion. Use nails to fix a U-shaped clip at the top plate position. S5. Adhere the prefabricated wall pier to the design position using special adhesive mortar, and use threaded rods to reinforce and fix it to the shear wall. The inner end of the threaded rod is connected to the pre-embedded nut, and the outer end of the threaded rod is tightened with a washer and nut at the flared position of the prefabricated wall pier. S6. Sealing: After the prefabricated wall pier is installed, the end of the flared opening is sealed with 1:2 cement mortar.

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