A super-high and super-thick shear wall corner formwork reinforcing system and construction method

Abstract

The present application belongs to the field of cast-in-place shear wall formwork technology, and particularly relates to a super-high and super-thick shear wall corner formwork reinforcing system and a construction method. The formwork reinforcing system comprises a three-node component and a connecting rod. A plurality of three-node components are connected in series along the height direction at the shear wall corner position through the connecting rod. The first node of the three-node component is connected with a horizontal tie rod, the horizontal tie rod is connected with a mountain-shaped clamp and a nut after passing through the first outer formwork of the shear wall, and the mountain-shaped clamp and the nut pull the formwork back lath. The second node of the three-node component is connected with a vertical tie rod, the vertical tie rod is connected with a mountain-shaped clamp and a nut after passing through the second outer formwork of the shear wall, and the mountain-shaped clamp and the nut pull the formwork back lath. The third node of the three-node component is connected with an inclined tie rod, the inclined tie rod is connected with a mountain-shaped clamp and a nut after passing through the inner formwork of the shear wall from the shear wall reentrant corner, and the mountain-shaped clamp and the nut pull the formwork back lath. The horizontal tie rod, the vertical tie rod and the inclined tie rod are connected into a whole through the three-node component, so that the formwork assemblies on the inner and outer sides of the wall body are closely attached to the wall body, and the formwork rising phenomenon is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cast-in-place shear wall formwork, and particularly relates to a super-high and super-thick shear wall corner formwork reinforcing system and a construction method. BACKGROUND

[0002] Shear walls are also known as wind-resistant walls, earthquake-resistant walls or structural walls. They are walls in a building or structure that mainly bear horizontal loads and vertical loads (gravity) caused by wind loads or earthquakes, preventing the structure from shearing (shear failure). They are also known as earthquake-resistant walls and are usually made of reinforced concrete.

[0003] Shear walls are divided into planar shear walls and cylindrical shear walls. Planar shear walls are used in reinforced concrete frame structures, raised slab structures and beam-free floor systems. To increase the stiffness, strength and anti-collapse ability of the structure, reinforced concrete shear walls can be cast in place or prefabricated and assembled at certain positions. The cast-in-place shear walls are poured at the same time as the surrounding beams and columns, and have good integrity. Cylindrical shear walls are used in high-rise buildings, high-rise structures and suspended structures, and are formed by the partition walls of elevator shafts, staircases, equipment and auxiliary rooms. The cylindrical walls are all cast-in-place reinforced concrete walls, and their stiffness and strength can withstand larger horizontal loads than planar shear walls. When pouring shear walls, formwork is needed for support and reinforcement. Formwork reinforcement generally uses steel or wood beams to assemble formwork brackets, uses steel or wood poles to build scaffolding to form bracket supports, and cooperates with steel formwork for concrete construction. Since shear walls are the main load-bearing walls in a building or structure, their thickness and extension differ from those of ordinary walls. The thickness of conventional shear walls is between 200 and 400 mm, and the thickness of super-thick shear walls is between 700 and 800 mm. However, the traditional formwork reinforcement method often has the following problems during the reinforcement process of the corners of super-thick shear walls: due to the change in space at the corners of shear walls, the traditional formwork reinforcement method cannot adapt to the thickness and angle changes at the corners of shear walls, and the tensioning rod can only be used between two parallel formworks, making it difficult to fill and support the gap at the corners of the formwork, reducing the compression and deformation resistance of the formwork at the corners of the shear wall.

[0004] The formwork reinforcing device for corners of walls and the construction method thereof disclosed in the patent application with the publication number CN116145950A press the formwork assemblies connected at an angle through the bent rods on the inner and outer formworks, and then use the pressing rods of the tensioning rods to pull and connect the multiple bent rods on the two formwork assemblies, so that the inner and outer formwork assemblies of the wall are tightly attached to the wall, avoiding the phenomenon of formwork expansion of the corner concealed column. However, the method has the following defects: 1. The operation is complex, reducing the assembly and disassembly rate of the supporting formwork; 2. The universality is poor, and one formwork reinforcing device can only be used at the corners of walls with the same cross-sectional size, with low turnover rate. SUMMARY

[0005] The application aims to solve the problem that the traditional template reinforcing mode is difficult to adapt to the thickness and angle change of the corner of the shear wall, and is difficult to quickly assemble or disassemble the template, thereby affecting the efficiency and stability of the shear wall template reinforcing construction.

[0006] The application provides the following technical scheme: a template reinforcing system for the corner of an ultrahigh and ultrathick shear wall, comprising a three-node component and a connecting rod, a plurality of three-node components are connected in series along the height direction at the corner position of the shear wall through the connecting rod, the connecting rod at the bottom is embedded in the lower shear wall, and the connecting rod at the top extends out of the top of the current shear wall plate and serves as the connecting rod at the bottom of the template reinforcing system of the upper shear wall; the first node of the three-node component is connected with a horizontal pull rod, the horizontal pull rod is connected with a mountain-shaped clamp and a nut after penetrating through the first outer template of the shear wall, and the mountain-shaped clamp and the nut pull the back of the template; the second node of the three-node component is connected with a vertical pull rod, the vertical pull rod is connected with a mountain-shaped clamp and a nut after penetrating through the second outer template of the shear wall, and the mountain-shaped clamp and the nut pull the back of the template; and the third node of the three-node component is connected with an inclined pull rod, the inclined pull rod is connected with a mountain-shaped clamp and a nut after penetrating through the inner template of the shear wall from the inside corner of the shear wall, and the mountain-shaped clamp and the nut pull the back of the template.

[0007] Further, the three-node component comprises a vertical pipe and three joint pipes which are vertically located in the same plane as the vertical pipe, both ends of the vertical pipe are used for inserting and connecting the connecting rod, and the three joint pipes are used as the first node, the second node and the third node respectively and are connected with the horizontal pull rod, the vertical pull rod and the inclined pull rod respectively to transmit the pulling force.

[0008] Further, threads are engraved in the three joint pipes, the joint pipes are connected with the pull rod through threads, and the pull rod comprises the horizontal pull rod, the vertical pull rod and the inclined pull rod.

[0009] Further, a supporting shoulder is arranged in the vertical pipe, the supporting shoulder is used for limiting the connecting rod at the bottom and supporting the connecting rod at the top.

[0010] Further, the three joint pipes comprise two fixed joint pipes and one movable joint pipe, the two fixed joint pipes are perpendicular, and the movable joint pipe can rotate around the vertical pipe as the shaft.

[0011] Further, rotatable shaft sleeves are sleeved on the vertical pipe above and below the joint pipes, and the movable joint pipe is fixedly connected with the shaft sleeves above and below.

[0012] Further, a first positioning part which is parallel to the axial direction of the vertical pipe and is distributed in the circumferential direction is arranged on the inner wall of the vertical pipe, a second positioning part on the shaft sleeve extends into the vertical pipe, the second positioning part can be aligned with the first positioning part by rotating the shaft sleeve, and a third positioning part is engraved on the inserting end of the connecting rod and matches the first positioning part and the second positioning part.

[0013] Further, the inner wall of the stand pipe is uniformly provided with first teeth, the shaft sleeve is fixed with a second tooth, and the insertion end of the connecting rod is uniformly provided with third teeth, the cross section of the third teeth is consistent with the tooth gap of the first teeth; the stand pipe and the connecting rod are in interference fit.

[0014] Further, the outer wall of the stand pipe includes small diameter sections on both sides of a middle large diameter section, the fixed joint pipe is fixed on the large diameter section, and the shaft sleeve is sleeved on the small diameter section, the upper and lower shaft sleeves are stopped at the end surface of the large diameter section to limit the axial movement of the movable joint pipe.

[0015] A construction method of a formwork reinforcing system at a corner of an ultra-high and super-thick shear wall, comprising the following steps:

[0016] S1: connecting the first three-node component with the connecting rod extending from the top plate, and adjusting the orientation of each joint pipe on the three-node component;

[0017] S2: sequentially inserting and installing the three-node components and the connecting rods from bottom to top to the top connecting rod extending to the top plate height of the shear wall of the current layer;

[0018] S3: binding the shear wall reinforcement, and temporarily fixing the connecting rod with the shear wall reinforcement;

[0019] S4: installing the shear wall formwork,

[0020] S5: positioning and opening holes in the position of the tie rod;

[0021] S6: fixing and adjusting the tie rod.

[0022] Compared with the prior art, the advantages of the present application are that:

[0023] The formwork reinforcing system at the corner of the ultra-high and super-thick shear wall is convenient to use, has good stability, and is highly universal, the three-node component is reserved during the binding stage of the internal reinforcement of the shear wall, and the installation of the wall reinforcement is not affected; the horizontal tie rod, the vertical tie rod and the inclined tie rod are pulled tightly from three directions, the horizontal tie rod, the vertical tie rod and the inclined tie rod are connected into a whole through the three-node component, and serve as counter forces for each other, so that the formwork assemblies on the inner and outer sides of the wall are closely attached to the wall, the swelling phenomenon of the corner hidden column is avoided, the internal and external corners of the formed wall at the corner are smooth, the probability of structure repair in the later stage is reduced, and the engineering cost is reduced.

[0024] The angle of the movable joint pipe in the three-node component can be adjusted, the three-node component can be used at the corner of the shear wall with the same thickness on both sides and at the corner of the shear wall with different thicknesses on both sides, the working range is wide, the connecting rod serves as a connecting piece between the three-node components and also as a positioning piece of the movable joint pipe, one installation operation completes two functions, the three-node component and the connecting rod have simple structures and low production cost, and are suitable for the use mode of being embedded in the shear wall. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic view of a three-node member and a connecting rod combination;

[0026] Figure 2 is a perspective view of a formwork reinforcement system for a super-high super-thick shear wall corner (part of the shear wall reinforcement is not shown);

[0027] Figure 3 is a plan view of a formwork reinforcement system for a super-high super-thick shear wall corner (part of the shear wall reinforcement is not shown);

[0028] Figure 4 is a structural schematic view of a three-node member;

[0029] Figure 5 is a schematic view of a support shoulder;

[0030] Figure 6 is a schematic view of the alignment of a first tooth and a second tooth;

[0031] Figure 7 is a structural schematic view of a connecting rod.

[0032] In the figure: 1-three node member; 1.1-standpipe; 1.2-support shoulder; 1.3-fixed joint pipe; 1.4-movable joint pipe; 1.5-bush; 1.6-first tooth; 1.7-second tooth; 2-connecting rod; 2.1-third tooth; 3-transverse tie; 4-first outer formwork; 5-mountain-shaped clamp; 6-nut; 7-longitudinal tie; 8-second outer formwork; 9-inclined tie; 10-inner formwork; 11-shear wall reinforcement. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0034] As Figure 1 , Figure 2 , Figure 3As shown: a super-high and super-thick shear wall corner formwork reinforcing system, comprising three-node components 1 and connecting rods 2, a plurality of three-node components 1 are connected in series along the height direction at the shear wall corner position through connecting rods 2, the first connecting rod 2 is embedded in the lower shear wall, and the first connecting rod 2 serves as a support structure of the entire formwork fixing device. The first node of the three-node component 1 is connected with a horizontal tie rod 3, the horizontal tie rod 3 passes through a first outer formwork 4 of the shear wall and is connected with a mountain-shaped clamp 5 and a nut 6 to pull the formwork back to the rafter, the second node of the three-node component 1 is connected with a vertical tie rod 7, the vertical tie rod 7 passes through a second outer formwork 8 of the shear wall and is connected with the mountain-shaped clamp 5 and the nut 6 to pull the formwork back to the rafter, and the third node of the three-node component 1 is connected with an inclined tie rod 9, the inclined tie rod 9 passes through an inner formwork 10 of the shear wall from the vertex of the shear wall reentrant corner and is connected with the mountain-shaped clamp 5 and the nut 6 to pull the formwork back to the rafter.

[0035] The position of the three-node component 1 is determined according to the distance from the horizontal tie rod 3 to the boundary of the first outer formwork 4 and the distance from the vertical tie rod 7 to the boundary of the second outer formwork 8, in order to facilitate the hole opening on the inner formwork 10 of the shear wall, the two inner formworks 10 are connected as a whole, and the holes are opened at the diagonal lines of the two inner formworks 10.

[0036] As shown: Figure 4 The three-node component comprises a vertical pipe 1.1 and three joint pipes which are vertically located in the same plane as the vertical pipe 1.1, the three joint pipes are flush, the vertical pipe 1.1 is only subjected to the pulling force parallel to the joint pipe, is more stable, and the resultant force of the three directions at the vertical pipe 1.1 is zero. The two ends of the vertical pipe 1.1 are used for inserting and connecting the connecting rod 2, the three joint pipes are respectively used as the first node, the second node and the third node, and are respectively connected with the horizontal tie rod 3, the vertical tie rod 7 and the inclined tie rod 9 to transmit the pulling force.

[0037] The three joint pipes are internally threaded, the joint pipes are threadedly connected with the tie rods, and the tie rods comprise the horizontal tie rod 3, the vertical tie rod 7 and the inclined tie rod 9; the three-node component 1 and the connecting rod 2 are installed at the steel bar binding stage in the shear wall, the connecting rod 2 is auxiliary connected with the steel bar by binding wire to avoid the connecting rod 2 from being skewed, the formwork corresponding to the hole of the three-node component 1 is installed after the steel bar binding in the shear wall is completed, the formwork is supported, then the horizontal tie rod 3, the vertical tie rod 7 and the inclined tie rod 9 are inserted into the formwork and are screwed with the joint pipes, and finally the mountain-shaped clamp 5 and the nut 6 are installed on the horizontal tie rod 3, the vertical tie rod 7 and the inclined tie rod 9 to pull the formwork.

[0038] As shown: Figure 5 The central pipe is internally provided with a supporting shoulder 1.2, the supporting shoulder 1.2 serves as the limiting of the lower connecting rod 2 and supports the upper connecting rod 2.

[0039] Three joint pipes can be fixed or one of them can be set as movable, which can be adjusted with the angle change of shear wall. Three joint pipes include two fixed joint pipes 1.3 and one movable joint pipe 1.4, two fixed joint pipes 1.3 are vertical, and movable joint pipe 1.4 can rotate around stand pipe 1.1.

[0040] Rotatable shaft sleeves 1.5 are sleeved on stand pipe 1.1 above and below joint pipes, and movable joint pipe 1.4 is fixedly connected with upper and lower shaft sleeves 1.5. Outer wall of stand pipe 1.1 includes two small-diameter sections on both sides of middle large-diameter section, fixed joint pipes 1.3 are fixed on large-diameter section, and shaft sleeves 1.5 are sleeved on small-diameter sections, upper and lower shaft sleeves 1.5 are blocked at end faces of large-diameter section to limit axial movement of movable joint pipe 1.4. Outer diameter of shaft sleeve 1.5 is equal to large diameter of outer wall of stand pipe 1.1, and end face of shaft sleeve 1.5 is aligned with end face of stand pipe 1.1.

[0041] As shown in Figure 6 , Figure 7 , inner wall of stand pipe 1.1 is provided with first positioning part parallel to axial direction and distributed in circumferential direction, second positioning part on shaft sleeve 1.5 extends into stand pipe 1.1, second positioning part can be aligned with first positioning part with rotation of shaft sleeve 1.5, and plug-in end of connecting rod 2 is engraved with third positioning part matched with first positioning part and second positioning part.

[0042] Specifically, first teeth 1.6 are uniformly arranged on inner wall of stand pipe 1.1, second teeth 1.7 are fixed on shaft sleeve 1.5, and third teeth 2.1 are uniformly arranged on plug-in end of connecting rod 2, and cross section of third teeth 2.1 is matched with tooth gap of first teeth 1.6.

[0043] Rotating movable joint pipe 1.4, second teeth 1.7 are aligned with selected first teeth 1.6, at this time, connecting rod 2 is inserted, first teeth 1.6 and second teeth 1.7 are engaged with third teeth 2.1, rotation of movable joint pipe 1.4 is locked, and stand pipes 1.1 of two three-node components 1 are engaged with same connecting rod 2, and angle between three-node components 1 is also fixed.

[0044] Stand pipe 1.1 is in interference fit with connecting rod 2 to prevent three-node components 1 from being skewed before penetrating into pull rod.

[0045] After concrete of shear wall is solidified, formwork is removed, and elongated part of horizontal pull rod 3, vertical pull rod 7 and inclined pull rod 9 is cut off.

[0046] A construction method of formwork reinforcing system at corner of super-high and super-thick shear wall, characterized in that, comprising the following steps:

[0047] S1: connecting first three-node component 1 with connecting rod 2 extending from top of plate, and adjusting orientation of each joint pipe of three-node component 1;

[0048] S2: Insert the three-node components 1 and connecting rods 2 one by one from bottom to top until the top connecting rod extends beyond the height of the top plate of the shear wall of this layer, ensuring that the angles of each three-node component 1 are consistent;

[0049] S3: Tie the shear wall reinforcement. Temporarily fix the connecting rod 2 to the shear wall reinforcement. Use binding wire to connect the connecting rod 2 to the reinforcement to prevent the connecting rod 2 from tilting.

[0050] S4: Install shear wall formwork; install formwork back ribs.

[0051] S5: Template positioning hole for tie rod position; for shear wall corners with the same structure, the template can be reused after the initial hole is made.

[0052] S6: Tie rod fixing and adjustment. First, install the horizontal tie rod 3 and the vertical tie rod 7. After pre-tightening the mountain-shaped clips 5 and nuts 6 on the horizontal tie rod 3 and the vertical tie rod 7, install the diagonal tie rod 9.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A formwork reinforcement system for corners of ultra-high and ultra-thick shear walls, characterized in that: The system includes three-node components (1) and connecting rods (2). Several three-node components (1) are connected in series along the height direction at the corner of the shear wall via connecting rods (2). The bottom connecting rods (2) are embedded in the lower shear wall, and the top connecting rods (2) extend outward from the top of the shear wall panel of this layer, serving as the bottom connecting rod of the upper shear wall formwork reinforcement system. The first node of the three-node component (1) is connected to a horizontal tie rod (3). The horizontal tie rod (3) passes through the first outer formwork (4) of the shear wall and then connects to... The mountain-shaped clip (5) and nut (6) are connected to the template back rib. The second node of the three-node component (1) is connected to the longitudinal tie rod (7). The longitudinal tie rod (7) passes through the second outer template (8) of the shear wall and then connects to the mountain-shaped clip (5) and nut (6) to connect to the template back rib. The third node of the three-node component (1) is connected to the diagonal tie rod (9). The diagonal tie rod (9) passes through the inner template (10) of the shear wall from the inside corner of the shear wall and then connects to the mountain-shaped clip (5) and nut (6) to connect to the template back rib. The three-node component (1) includes a riser (1.1) and three connector pipes located in the same plane perpendicular to the riser (1.1). The two ends of the riser (1.1) are used to insert connecting rods (2). The three connector pipes serve as the first node, the second node, and the third node, respectively, and are connected to the horizontal tie rod (3), the longitudinal tie rod (7), and the diagonal tie rod (9) to transmit tension. The three connector pipes include two fixed connector pipes (1.3) and one movable connector pipe (1.4), the two fixed connector pipes (1.3) are perpendicular, and the movable connector pipe (1.4) rotates about the riser (1.1) as an axis; The riser (1.1) has rotatable bushings (1.5) fitted above and below the connector pipe, and the movable connector pipe (1.4) is fixedly connected to the upper and lower bushings (1.5); The inner wall of the riser (1.1) is provided with a first positioning part that is parallel to its axial direction and distributed circumferentially. The second positioning part on the bushing (1.5) extends into the riser (1.1). The second positioning part can be aligned with the first positioning part as the bushing (1.5) rotates. The insertion end of the connecting rod (2) is engraved with a third positioning part that cooperates with the first and second positioning parts.

2. The formwork reinforcement system for corners of ultra-high and ultra-thick shear walls according to claim 1, characterized in that: The three connector tubes are threaded inside, and the connector tubes are threaded to the tie rods. The tie rods include a horizontal tie rod (3), a vertical tie rod (7), and a diagonal tie rod (9).

3. The formwork reinforcement system for corners of ultra-high and ultra-thick shear walls according to claim 2, characterized in that: The riser is provided with a support shoulder (1.2), which serves as a limit for the lower connecting rod (2) and supports the upper connecting rod (2).

4. The formwork reinforcement system for corners of ultra-high and ultra-thick shear walls according to claim 1, characterized in that: The inner wall of the riser (1.1) is evenly arranged with first teeth (1.6), a second tooth (1.7) is fixed on the bushing (1.5), and the insertion end of the connecting rod (2) is evenly arranged with third teeth (2.1). The cross section of the third tooth (2.1) matches the tooth gap of the first tooth (1.6); the riser (1.1) and the connecting rod (2) are interference fit.

5. The formwork reinforcement system for corners of ultra-high and ultra-thick shear walls according to claim 1, characterized in that: The outer wall of the riser (1.1) includes small diameter sections on both sides of the large diameter section in the middle. The fixed joint pipe (1.3) is fixed on the large diameter section, and the bushing (1.5) is sleeved on the small diameter section. The upper and lower bushings (1.5) stop at the end face of the large diameter section to restrict the axial movement of the movable joint pipe (1.4).

6. A construction method for the formwork reinforcement system at the corner of an ultra-high and ultra-thick shear wall as described in claim 4, characterized in that, Includes the following steps: S1: Connect the first three-node component (1) to the connecting rod (2) extending from the top of the plate, and adjust the orientation of each joint pipe on the three-node component (1); S2: Insert the three-node components (1) and connecting rods (2) one by one from bottom to top until the top connecting rod extends beyond the top plate of the shear wall of this layer; S3: Tie the shear wall reinforcement, and temporarily fix the connecting rod (2) to the shear wall reinforcement; S4: Install shear wall formwork. S5: Positioning hole for tie rod position template; S6: Tie rod fixing and adjustment.

Images