Non-pre-buried outer scaffold wall connecting device and construction method

Abstract

The application provides a non-pre-buried outer scaffold wall connecting device and a construction method. The wall connecting device comprises a main support, a first connecting piece, a first locking piece, a second connecting piece, a second locking piece and a hoop. The first connecting piece is movably connected to the main support and can move along a first direction on the main support. At least one end of the first connecting piece is provided with the first locking piece, and the first locking piece releasably fixes the first connecting piece to the main support. The second connecting piece is movably connected to the main support and can move along the first direction on the main support. At least one end of the second connecting piece is provided with the second locking piece, and the second locking piece releasably fixes the second connecting piece to the main support. The hoop is arranged at the end of the second connecting piece away from the main support, and the axis of the hoop is perpendicular to the first direction. The application uses the existing tensioning screw through hole on the shear wall to complete the installation, without additional hole opening and plugging. Through the position adjustment of the main support, the second connecting piece and the like, the tensioning point of the scaffold upright rod can be accurately aligned.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a non-embedded external scaffolding wall ties device and construction method. Background Technology

[0002] In the construction of high-rise buildings with shear wall structures, reliable connection between the external scaffolding and the main structure is a crucial factor in ensuring the overall stability of the scaffolding. Currently, conventional connection methods mainly include the pre-embedded steel pipe method and the chemical anchor method.

[0003] The pre-embedded steel pipe method involves embedding vertical steel pipes into the building floor slab, extending them a certain height above the slab surface. A wall tie is then installed between the pre-embedded steel pipe and the scaffold upright, with both ends connected to the pre-embedded steel pipe and the scaffold upright respectively using fasteners, thus achieving a connection. However, this method requires high precision in the pre-embedded position; positioning deviations during construction can easily affect the connection effect. Furthermore, after the scaffold is dismantled, the pre-embedded steel pipe needs to be cut, increasing labor and machinery input and causing material waste.

[0004] While chemical anchors can avoid pre-embedding work, the process is complex, construction efficiency is low, and the cost of anchoring materials is high. Furthermore, this method requires drilling holes in the shear wall components for anchoring with chemical anchors, inevitably leaving holes on the structural surface that need to be repaired later. This not only increases the construction steps but may also affect the wall's appearance and structural durability.

[0005] In summary, existing connection methods have certain shortcomings in terms of construction convenience, economy, and structural integrity, and there is an urgent need to explore more efficient, economical connection schemes that have less impact on the main structure. Summary of the Invention

[0006] The purpose of this invention is to provide a non-embedded external scaffolding wall ties device and construction method to overcome the shortcomings in the above-mentioned background technology.

[0007] The technical solution of this invention is: a non-embedded external scaffolding wall ties device, comprising:

[0008] Main support;

[0009] The first connecting member is movably connected to the main support and can move along the first direction on the main support;

[0010] The first locking fastener is provided at least one end of the first connector, and the first locking fastener releasably fixes the first connector to the main bracket.

[0011] The second connecting member is movably connected to the main support and can move along the first direction on the main support;

[0012] The second locking fastener is provided at least one end of the second connector, and the second locking fastener releasably fixes the second connector to the main bracket.

[0013] A clamp is provided at the end of the second connecting member away from the main support, and the axis of the clamp is orthogonal to the first direction.

[0014] Preferably, the main support is provided with a first guide portion and a second guide portion, the first guide portion and the second guide portion are spaced apart and extend along the first direction respectively, the first connecting member is limited to the first guide portion, and the second connecting member is limited to the second guide portion.

[0015] Preferably, the main support is C-shaped, the first guide portion is a first groove formed on the web of the main support, the first connecting member passes through the first groove and connects to the first locking member; the second guide portion is a second groove formed on the wing plate of the main support, the second locking member passes through the second groove and connects to the second connecting member.

[0016] Preferably, the first locking fastener is located inside the main support and presses against the web of the main support; the first locking fastener is sleeved on the first connecting member and threadedly connected to the first connecting member.

[0017] Preferably, the first locking fastener is provided at the end of the first connecting member away from the main bracket.

[0018] Preferably, a gasket is provided between the first locking fastener and the main bracket, the gasket is sleeved on the first connecting member, and the inner diameter of the gasket is less than the outer diameter of the first locking fastener and the outer diameter of the gasket.

[0019] Preferably, the clamp includes a first half-clamp and a second half-clamp, the first half-clamp and the second half-clamp are concave to each other and connected by a third locking fastener; the two wing plates of the main bracket are respectively connected to a second connecting member, and the two second connecting members are respectively the first half-clamp and the second half-clamp.

[0020] Preferably, the second and third locking components are high-strength bolt-nut pairs.

[0021] The technical solution of the present invention also includes: a method for construction using the above-mentioned non-embedded external scaffolding wall ties, which includes the following steps:

[0022] The first connecting piece is inserted into the through hole of the tie rod of the shear wall, the main support is moved along the first direction, the positional relationship between the main support and the scaffold wall tie is roughly adjusted, and the first connecting piece, the main support and the shear wall are locked with the first locking fastener.

[0023] Install the second connector on the main support, move the second connector along the first direction, finely adjust the positional relationship between the second connector and the wall tie rod, and use the second locking fastener to lock the second connector to the main support.

[0024] Connect the clamps to the wall ties of the scaffolding.

[0025] The beneficial effects of this invention include: compared to existing methods such as pre-embedded steel pipes requiring pre-embedded steel pipes in the floor slab and subsequent cutting and repair after scaffolding removal, and chemical anchor bolts requiring additional drilling, chemical anchor bolt insertion, and increased hole sealing work, this invention directly utilizes the existing tie rod through holes in the shear wall for installation, eliminating the need for additional holes in the main structure and thus avoiding additional hole sealing work. Furthermore, by adjusting the relative positions between the main support and the first connecting member, as well as between the main support and the second connecting member, the spatial positioning of the clamp can be precisely adjusted based on the inherent position of the through hole, ensuring accurate alignment with the tie point of the scaffolding upright, thus solving the problem of mismatch between the existing through hole distribution and scaffolding tie requirements. The entire installation process requires no welding or cutting and is entirely prefabricated. After scaffolding removal, the wall-connecting device can be completely disassembled from the wall and reused, reducing material consumption and construction costs while ensuring tie reliability and balancing construction efficiency and structural integrity. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an embodiment of the present invention;

[0027] Figure 2 This is a usage state diagram of an embodiment of the present invention.

[0028] In the picture:

[0029] 1. Main support; 1.1. First slide groove; 1.2. Second slide groove;

[0030] 2. First connecting component;

[0031] 3. Second connecting component;

[0032] 4. Clamp; 4.1 First half-clamp; 4.2 Second half-clamp;

[0033] 5. First locking device;

[0034] 6. Second locking device;

[0035] 7. Third locking device;

[0036] 8. Gaskets;

[0037] 9. Scaffolding wall ties;

[0038] 10. Scaffolding uprights;

[0039] 11. Shear wall. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] In the description of the embodiments of this invention, it should be understood that the terms "top," "bottom," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and 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. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0042] Reference Appendix Figure 1-2 This invention provides a non-embedded external scaffolding wall-connecting device, comprising a main support 1, a first connecting member 2, a second connecting member 3, a clamp 4, a first locking member 5, and a second locking member 6. The first connecting member 2 is movably connected to the main support 1 and can move along a first direction on the main support 1. Each end of the first connecting member 2 is provided with a first locking member 5, one first locking member 5 releasably fixing the first connecting member 2 to the main support 1, and the other first locking member 5 releasably fixing the first connecting member 2 to a shear wall 11. The second connecting member 3 is movably connected to the main support 1 and can move along the first direction on the main support 1. One end of the second connecting member 3 is provided with a second locking member 6, which releasably fixes the second connecting member 3 to the main support 1. The clamp 4 is located at the end of the second connecting member 3 away from the main support 1, and the axis of the clamp 4 is orthogonal to the first direction. The clamp 4 is used to connect to the scaffolding uprights 10 via scaffolding wall-connecting rods 9.

[0043] The design concept of the above scheme is based on the following engineering practice: During the construction of the shear wall 11 structure, in order to ensure the stability of the formwork system during concrete pouring, tie rods are usually inserted between the formwork on both sides of the shear wall 11 and fastened. When the concrete reaches the design strength and the formwork is removed, the tie rods are pulled out, leaving through holes in the shear wall 11 along the wall thickness direction. The distribution, diameter, and spacing of these through holes were determined during the structural design stage according to the load-bearing capacity, stability, and seismic performance requirements of the shear wall 11. The arrangement parameters are entirely for the formwork reinforcement needs, not for the tie rods of the external scaffolding. Therefore, the spacing and density of these through holes in space often do not correspond to the position of the scaffolding uprights 10, and the diameter of the through holes is fixed, making it impossible to effectively anchor the scaffolding wall tie rods 9 to the holes directly using conventional fasteners such as bolts. If forced to use them, additional transition components or on-site modifications are required, which is difficult to implement and the reliability is hard to guarantee.

[0044] In view of the above-mentioned technical situation, the non-embedded external scaffolding wall-connecting device provided by the present invention, when in use, inserts the first connecting member 2 into the through hole formed on the shear wall 11 after the tie rod is removed. The through hole penetrates the wall along the thickness direction of the shear wall 11. In the installed state, the first direction is parallel to the shear wall surface. After the first connecting member 2 is inserted into the through hole, its two ends extend out of the two side surfaces of the shear wall 11 respectively. The first locking fastener 5 away from the main support 1 locks the first connecting member 2 to the shear wall 11, realizing the axial positioning of the first connecting member 2 in the through hole of the shear wall 11; the other first locking fastener 5 close to the main support 1 locks the first connecting member 2 to the main support 1. During this process, since the first connecting member 2 is movably connected to the main support 1 and can move relative to it along the first direction, before the two first locking fasteners 5 are finally locked, the positional relationship between the clamp 4 and the scaffolding upright 10 can be initially adjusted by moving the main support 1 relative to the first connecting member 2 along the first direction. Subsequently, the second connecting piece 3 is installed on the main support 1. Since the second connecting piece 3 is also movably connected to the main support 1 and can move relative to it in the first direction, the position of the clamp 4 in space can be further precisely adjusted by moving the second connecting piece 3 relative to the main support 1 in the first direction until the clamp 4 accurately aligns with the scaffold wall tie 9. That is, the second connecting piece 3 is locked to the main support 1 by the second locking fastener 6, completing the installation and positioning of the entire wall tie device. Finally, the scaffold wall tie 9 is clamped and fixed by the clamp 4, and the scaffold wall tie 9 is then connected to the scaffold upright 10 by fasteners, thus achieving a reliable connection between the wall tie device and the scaffold upright 10.

[0045] Compared to existing methods such as pre-embedded steel pipes (requiring pre-embedded steel pipes in the floor slab and subsequent cutting and repair after scaffolding removal) and chemical anchor bolts (requiring additional drilling and chemical anchor bolt installation on the shear wall 11, increasing the workload of hole sealing), this invention directly utilizes the existing tie rod through holes on the shear wall 11 for installation. No additional holes need to be drilled in the main structure, thus avoiding additional hole sealing work. Furthermore, by adjusting the relative positions between the main support 1 and the first connecting member 2, and between the main support 1 and the second connecting member 3, the spatial positioning of the clamp 4 can be precisely adjusted based on the inherent position of the through hole, ensuring accurate alignment with the tie point of the scaffold upright 10. This solves the problem of mismatch between the existing through hole distribution and scaffolding tie requirements. The entire installation process requires no welding or cutting; it is entirely prefabricated. After scaffolding removal, the wall-connecting device can be completely disassembled from the wall and reused, reducing material consumption and construction costs while ensuring tie reliability and balancing construction efficiency and structural integrity.

[0046] To meet the aforementioned adjustment requirements, this solution includes a first guide section and a second guide section on the main support 1. The first and second guide sections are spaced apart and extend along a first direction. The first connecting member 2 engages with the first guide section, and the second connecting member 3 engages with the second guide section. Through these two levels of guidance and limiting, the main support 1 and the second connecting member 3 perform coarse and fine adjustments to the spatial position of the clamp 4 at different adjustment stages, ultimately ensuring accurate alignment between the clamp 4 and the scaffold wall tie rod 9.

[0047] To improve connection strength and ease of installation, the main support 1 in this embodiment is C-shaped, including a web and two wing plates respectively connected to both sides of the web. The first guide portion is a first groove 1.1 formed on the web, extending along a first direction. A first connecting member 2 passes through the first groove 1.1 and connects to a first locking fastener 5 located inside the main support 1. The second guide portions are second grooves 1.2 formed on the two wing plates, each extending along the first direction. Each wing plate is connected to a second connecting member 3, and each second connecting member 3 is connected to a second locking fastener 6. The second locking fastener 6 passes through the second groove 1.2 and is locked to the main support 1. The clamp 4 includes a first half-clamp 4.1 and a second half-clamp 4.2, with the first half-clamp 4.1 and the second half-clamp 4.2 arranged concavely opposite each other. They are connected and fixed by a third locking fastener 7. Furthermore, the ends of the two second connecting members 3 furthest from the main support 1 are respectively fixedly connected to the first half-clamp 4.1 and the second half-clamp 4.2.

[0048] Through the above structure, the first slide groove 1.1 and the second slide groove 1.2 respectively form independent movement constraints on the first connecting member 2 and the second connecting member 3, so that the two do not interfere with each other during the adjustment process and the adjustment path is clear and definite. At the same time, the two wing plates are symmetrically connected to the two half-hoops of the clamp 4 through the second connecting member 3, so that when the scaffold wall tie rod 9 is subjected to the horizontal load transmitted by the scaffold, the force can be evenly distributed to both sides of the main support 1 through the clamp 4, avoiding the eccentric bending moment caused by unilateral force, and significantly improving the fatigue resistance and overall stability of the device under reciprocating load. In addition, the clamp 4 adopts a structure in which the first half-hoop 4.1 and the second half-hoop 4.2 are relatively interlocked. The two half-hoops are respectively fixedly connected to the ends of the two second connecting members 3. When installing the scaffold wall tie rod 9, it is only necessary to fasten the two half-hoops to both sides of the wall tie rod and lock them with the third locking fastener 7 to complete the fixation. When disassembling, the two half-hoops can be separated by loosening the third locking fastener 7. It is not necessary to insert or pull the wall tie rod along its axial direction, which is convenient.

[0049] Reference Appendix Figure 1 The first locking component 5 is a nut, which is sleeved on the first connecting member 2 and threadedly engaged with it. In the locked state, one of the first locking components 5 is screwed to engage with the web of the main support 1, locking the first connecting member 2 relative to the main support 1; the other first locking component 5 is screwed to engage with the surface of the shear wall 11, anchoring the first connecting member 2 into the through hole of the shear wall 11. Locking and unlocking can be achieved by screwing, which is convenient to adjust and reliable in locking.

[0050] To prevent damage to the wall surface when the first locking fastener 5 presses against the shear wall 11, this embodiment provides a gasket 8 between the first locking fastener 5 and the shear wall 11. The gasket 8 is fitted onto the first connecting member 2 and can move axially along the first connecting member 2. The inner diameter of the gasket 8 is smaller than the outer diameter of the first locking fastener 5, and the outer diameter of the first locking fastener 5 is smaller than the outer diameter of the gasket 8, so that when the first locking fastener 5 is tightened, its end face can completely press against the surface of the gasket 8 instead of directly contacting the shear wall 11. During installation, the gasket 8 is first moved along the first connecting member 2 to one side of the shear wall 11 surface, and then the first locking fastener 5 used to press against the shear wall 11 is tightened, so that the first locking fastener 5 indirectly presses against the shear wall 11 through the gasket 8, thereby dispersing the concentrated force into surface pressure acting on the wall surface, effectively avoiding local crushing of concrete or surface damage caused by stress concentration. At the same time, the large outer diameter design of the gasket 8 further increases the force-bearing area and improves the reliability of the anchoring.

[0051] Reference Appendix Figure 1The second locking component 6 and the third locking component 7 are high-strength bolt and nut pairs. The second locking component 6 passes through the second sliding groove 1.2 to securely connect the second connecting piece 3 to the wing plate of the main support 1, and the third locking component 7 securely connects the first half-hoop 4.1 and the second half-hoop 4.2. Using high-strength bolt and nut pairs as locking components provides high connection strength, good shear resistance, easy assembly and disassembly, and reusability, ensuring reliable locking at each connection point under the reciprocating load transmitted by the scaffolding, preventing loosening.

[0052] Compared with the prior art, the present invention has at least the following advantages: Compared with the existing pre-embedded steel pipe method, which requires pre-embedding steel pipes in the floor slab and cutting and repairing after scaffolding removal, and the chemical anchor bolt method, which requires drilling holes in the shear wall 11, inserting chemical anchor bolts for anchoring, and increasing the amount of hole sealing work, the present invention directly utilizes the existing tie rod through holes in the shear wall 11 to complete the installation, without the need for additional holes to be drilled in the main structure, thus avoiding additional hole sealing work. Moreover, through the connection between the main support 1 and the first connecting member 2 and the main support... The relative position adjustment between 1 and the second connecting piece 3 can precisely adjust the spatial positioning of the clamp 4 based on the inherent position of the through hole, so that it is accurately aligned with the tie point of the scaffold upright 10, solving the problem of mismatch between the existing through hole distribution and the scaffold tie requirements; the entire installation process does not require welding or cutting, and is entirely a prefabricated operation. After the scaffold is dismantled, the wall tie device can be completely disassembled from the wall and reused, which reduces material consumption and construction costs, and also takes into account construction efficiency and structural integrity while ensuring tie reliability.

[0053] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A non-embedded external scaffolding wall ties device, characterized in that, include: Main support; The first connecting member is movably connected to the main support and can move along the first direction on the main support; The first locking fastener is provided at least one end of the first connector, and the first locking fastener releasably fixes the first connector to the main bracket. The second connecting member is movably connected to the main support and can move along the first direction on the main support; The second locking fastener is provided at least one end of the second connector, and the second locking fastener releasably fixes the second connector to the main bracket. A clamp is provided at the end of the second connecting member away from the main support, and the axis of the clamp is orthogonal to the first direction.

2. The non-embedded external scaffolding wall ties according to claim 1, characterized in that, The main support is provided with a first guide portion and a second guide portion, the first guide portion and the second guide portion are spaced apart and extend along the first direction respectively, the first connecting member is limited to the first guide portion, and the second connecting member is limited to the second guide portion.

3. The non-embedded external scaffolding wall ties according to claim 2, characterized in that, The main support is C-shaped. The first guide portion is a first groove formed on the web of the main support, and the first connecting member passes through the first groove to connect to the first locking member. The second guide portion is a second groove formed on the wing plate of the main support, and the second locking member passes through the second groove to connect to the second connecting member.

4. The non-embedded external scaffolding wall ties according to claim 3, characterized in that, The first locking fastener is located inside the main support and presses against the web of the main support; the first locking fastener is sleeved on the first connecting member and threadedly connected to the first connecting member.

5. The non-embedded external scaffolding wall ties according to claim 4, characterized in that, The first locking fastener is provided at the end of the first connector away from the main bracket.

6. The non-embedded external scaffolding wall ties according to claim 5, characterized in that, A gasket is provided between the first locking fastener and the main bracket. The gasket is sleeved on the first connecting member, and the inner diameter of the gasket is less than the outer diameter of the first locking fastener.

7. The non-embedded external scaffolding wall ties according to any one of claims 3-6, characterized in that, The clamp includes a first half-clamp and a second half-clamp, the first half-clamp and the second half-clamp are concave to each other and connected by a third locking fastener; the two wing plates of the main bracket are respectively connected to a second connecting member, and the two second connecting members are the first half-clamp and the second half-clamp respectively.

8. The non-embedded external scaffolding wall ties according to claim 7, characterized in that, The second and third locking components are high-strength bolt-nut pairs, respectively.

9. A method for construction using the non-embedded external scaffolding wall ties according to any one of claims 1-8, characterized in that, Including the following steps: The first connecting piece is inserted into the through hole of the tie rod of the shear wall, the main support is moved along the first direction, the positional relationship between the main support and the scaffold wall tie is roughly adjusted, and the first connecting piece, the main support and the shear wall are locked with the first locking fastener. Install the second connector on the main support, move the second connector along the first direction, finely adjust the positional relationship between the second connector and the wall tie rod, and use the second locking fastener to lock the second connector to the main support. Connect the clamps to the wall ties of the scaffolding.

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