Parallel box bolted assembly type concrete shear wall connecting structure

Abstract

The application discloses a kind of parallel box bolt connection's fabricated concrete shear wall connection structure, comprising: connecting box, the bottom of the connecting box is provided with lengthened opening, a plurality of bolts are arranged in the lengthened opening, the bolt is anchored in the lower wall body, the lower wall body is attached to the bottom lower surface of connecting box and is resisted to lengthened opening, the lower wall body and lengthened opening form lengthened channel;The nut is threadedly connected to the bolt, a gasket is mounted between the nut and lengthened channel, the gasket is mounted on the top surface of the bottom of the connecting box, a plurality of abutting limit posts are placed in the lengthened channel, the gap between each limit post is filled with filler, and the plurality of bolts are limited by the limit post and filler;A plurality of anchor bars are installed above the connecting box and arranged in parallel, and the upper end of the anchor bar is in a non-linear structure.The application is simple to install.

Description

Technical Field

[0001] This invention relates to the field of concrete technology, and in particular to a prefabricated concrete shear wall connection structure with parallel box-type bolt connections. Background Technology

[0002] Existing prefabricated concrete shear wall connection structures using box-type bolt connections, such as Figure 1 As shown, this structure includes a connecting box 1', a slot 2' at the bottom of the connecting box 1', a bolt 3' passing through the slot 2', a nut 4' threaded to the top of the bolt 3', a pad 5' installed between the nut 4' and the bottom of the connecting box 1', and a C-shaped anchor bar 6' installed on the top of the connecting box 1'.

[0003] The existing structure, due to the limited space within the connecting box 1', can only accommodate one bolt 3'. The diameter of the slot 2' is slightly larger than the diameter of the bolt 3'. During wall installation, if... Figure 2 and Figure 3 As shown, bolt 3' is anchored to the lower wall 7', and connecting box 1' is pre-embedded in the upper wall 8'. Since bolt 3' and slot 2' are approximately the same size, bolt 3' can only pass through slot 2' precisely when bolt 3' is installed perpendicularly to slot 2'. However, during installation in a single-hole wall, connecting box 1' or bolt 3' may be tilted. Due to the tilt, if the tilt is too small, bolt 3' will fit tightly with connecting box 1', increasing installation difficulty; if the tilt is too large, bolt 3' cannot be installed with connecting box 1'. Therefore, this structure requires a high degree of verticality of connecting box 1', and the allowable tilt error of connecting box 1' during construction must be small. In addition, existing connecting boxes 1' have bonding structures for bonding with concrete, mostly in the form of C-shaped anchor bars 6'. Since the upper part of the C-shaped anchor bar 6' is a straight structure, the contact area with the concrete is small, which will affect the bonding performance between the C-shaped anchor bar 6' and the concrete. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a prefabricated concrete shear wall connection structure with parallel box-type bolt connection.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this invention is as follows: a prefabricated concrete shear wall connection structure with parallel box-type bolt connection, comprising: a connection box, which is pre-embedded in the upper wall panel; an extended opening is provided in the bottom of the connection box, and multiple bolts are inserted through the extended opening, the bolts are anchored in the lower wall, the lower wall is attached to the lower bottom surface of the connection box and abuts against the extended opening, and an extended channel is formed between the lower wall and the extended opening; a nut is threaded onto the bolt, a washer is installed between the nut and the extended channel, the washer is installed on the upper bottom surface of the connection box, multiple adjacent limiting posts are placed in the extended channel, and the gaps between each limiting post are filled with filler material, which limits the multiple bolts through the limiting posts and filler material; multiple parallel anchor bars are installed above the connection box, and the upper end of the anchor bars has a non-linear structure.

[0006] Furthermore, the non-linear structure is a wavy structure or a broken line structure.

[0007] Furthermore, the filler is epoxy resin or self-compacting mortar.

[0008] Furthermore, the limiting post is made of steel cylinder.

[0009] Furthermore, the height of the limiting post is 1 / 2 to 1 times the height of the extended channel.

[0010] Furthermore, the elongated opening has a wavy structure.

[0011] Furthermore, the connecting box includes an upper top plate, a lower bottom plate, a left side plate, a right side plate, and a rear side plate. The upper top plate, lower bottom plate, left side plate, right side plate, and rear side plate form a square structure. The lower bottom plate is provided with an elongated opening, and the pad is installed on the upper surface of the lower bottom plate.

[0012] Furthermore, the bolt includes a screw and a screw head, the lower end of the screw is fixedly connected to the screw head, and the upper end of the screw passes through the lower wall and the extended opening, and is threadedly connected to the nut.

[0013] Furthermore, the bottom of the upper wall is provided with a boss, and the connecting box is pre-embedded in the boss; the top of the lower wall is provided with a groove that matches the boss, and the screw is anchored in the groove. When the screw is threadedly connected to the connecting box, the boss and the groove are interlocked; the first casting area above the boss in the upper wall and the second casting area below the groove in the lower wall are both made of UHPC material.

[0014] Furthermore, the number of bolts is three, and the three bolts are equally spaced and parallel to each other within the extended opening.

[0015] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0016] Because of its extended opening, this invention can be quickly installed even when the connecting box or bolts are tilted during wall installation. This structure has low requirements for verticality, allows for a large tilt error during construction, and is easy to install. The extended opening and bolt connection can avoid anchorage damage.

[0017] The limiting posts and filler are used to limit the movement of multiple bolts, thereby achieving a tight fit between the limiting posts, filler, bolts and the inner wall of the extended channel, preventing the bolts from shifting under horizontal force.

[0018] The anchor bar of the present invention adopts a non-linear structure, which can increase the adhesion with concrete, greatly enhance the connection strength between the connection box and the concrete, and improve the overall stress performance, safety and durability of the engineering structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of an existing prefabricated concrete shear wall connection structure with box-type bolt connections.

[0021] Figure 2 It is an assembly drawing of bolts to the lower wall and connecting box to the upper wall.

[0022] Figure 3 It is an assembly diagram of the bolts and the inclined connecting box in the prior art.

[0023] Figure 4 This is an assembly diagram of the bolts and the inclined connecting box in this invention.

[0024] Figure 5a This is a three-dimensional view of the overall installation of a prefabricated concrete shear wall connection structure with parallel box-type bolt connection provided by the present invention.

[0025] Figure 5b yes Figure 5a Front view of the connecting box and bolts not connected.

[0026] Figure 5c yes Figure 5a Front view of the connecting box and bolts already connected.

[0027] Figure 6 This is a schematic diagram of the connection box and bolt connection in a prefabricated concrete shear wall connection structure with parallel box-type bolt connection provided by the present invention.

[0028] Figure 7 This is a front view of the structure of the present invention.

[0029] Figure 8 This is a side view of the structure of the present invention.

[0030] Figure 9 This is a bottom view of the structure of the present invention.

[0031] Figure 10 This is a front view of the installation of the limiting post in this invention.

[0032] Figure 11 This is a bottom view of the installation of the limiting post in this invention.

[0033] Explanation of the labels in the diagram:

[0034] Connection box 1, top plate 11, bottom plate 12, left side plate 13, right side plate 14, rear side plate 15, extended opening 2, bolt 3, screw 31, screw head 32, lower wall 4, groove 41, second pouring area 42, extended channel 5, nut 6, pad 7, limiting post 8, filler 9, anchor bar 10, vertical bar 101, reinforcing bar 102, upper wall 100, boss 110, first pouring area 120. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the invention. Similarly, the following embodiments are only some, not all, embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 4-11This invention discloses a prefabricated concrete shear wall connection structure with parallel box-type bolt connection, comprising: a connection box 1, which is embedded in an upper wall panel 100; an extended opening 2 is provided in the bottom of the connection box 1, and multiple bolts 3 are inserted through the extended opening 2, the bolts 3 being anchored in a lower wall 4, the lower wall 4 being fitted against the lower bottom surface of the connection box 1 and abutting against the extended opening 2, and an extended channel 5 being formed between the lower wall 4 and the extended opening 2; a nut 6 is threaded onto the bolt 3, and a washer 7 is installed between the nut 6 and the extended channel 5, the washer 7 being installed on the upper bottom surface of the connection box 1; multiple adjacent limiting posts 8 are tightly placed in the extended channel 5, and the gaps between each limiting post 8 are filled with filler material 9, which limits the multiple bolts 3 through the limiting posts 8 and the filler material 9, thus connecting multiple bolts 3 in parallel. Due to the design of the extended channel 5... The extended opening 2 is longer, allowing for quick installation even when the connecting box 1 or bolt 3 is tilted during wall installation. This structure has lower requirements for verticality, allows for a larger tolerance for tilt error during construction, and is easy to install. The connection between the extended opening 2 and bolt 3 can avoid anchorage damage. Multiple parallel anchor bars 10 are installed above the connecting box 1, and the upper end of the anchor bar 10 has a non-linear structure. Specifically, each anchor bar 10 includes two vertical bars 101 and one reinforcing bar 102. The lower ends of the two vertical bars 101 are respectively fixed to the left and right outer sides (left side plate and right side plate) of the connecting box 1, and the left and right ends of the reinforcing bar 102 are respectively connected between the upper ends of the two vertical bars 101. The non-linear structure can increase the adhesion with concrete, which can greatly enhance the connection strength between the connecting box 1 and the concrete, improve the overall load-bearing performance, and enhance the safety and durability of the engineering structure.

[0037] In this embodiment, the non-linear structure is a wavy structure or a zigzag structure. Compared with a straight structure, the contact area with concrete is larger, which can increase the adhesion with concrete.

[0038] In this embodiment, the filler 9 is epoxy resin or self-compacting mortar. Epoxy resin or self-compacting mortar is used to fill the gaps between the limiting posts 8 to prevent the bolts 3 from shifting under horizontal force. Self-compacting mortar is a new type of high-performance mortar with excellent self-compacting properties and durability. Epoxy resin is a high-molecular polymer with the molecular formula (C11H12O3)n, referring to a class of polymers containing two or more epoxy groups in their molecules. The main components of self-compacting mortar are cement, fine sand, special additives, and water; its mix proportion needs to be designed according to actual conditions.

[0039] In this embodiment, the limiting post 8 is made of steel cylinder, which enhances its strength. Multiple limiting posts 8 may have the same or different dimensions. A suitable size limiting post 8 is selected based on the size of the space inside the extended channel 5 to achieve sealing and limiting, ensuring a tight fit between the multiple limiting posts 8, the filler material 9, the bolts 3, and the inner wall of the extended channel 5, preventing the bolts 3 from shifting under horizontal force.

[0040] In this embodiment, the height of the limiting post 8 is 1 / 2 to 1 times the height of the extended channel 5, which serves to prevent the bolt 3 from shifting. If the height of the limiting post 8 is less than 1 / 2 times the height of the extended channel 5, it will not be able to hold the bolt 3 in place. If the height of the limiting post 8 is greater than the height of the extended channel 5, the cost will increase. Ideally, the height of the limiting post 8 is the same as the height of the extended channel 5.

[0041] In this embodiment, the elongated opening has a wave-shaped structure, which facilitates the placement and fitting of the filler and the limiting post.

[0042] In this embodiment, the connecting box 1 includes an upper top plate 11, a lower bottom plate 12, a left side plate 13, a right side plate 14, and a rear side plate 15. The upper top plate 11, lower bottom plate 12, left side plate 13, right side plate 14, and rear side plate 15 form a square structure. The lower bottom plate 12 is provided with an extended opening 2. The pad 7 is installed on the upper surface of the lower bottom plate 12. The pad 7 is made of steel and is 5mm thick. Its horizontal area is larger than the area of ​​the extended opening 2 at the installation location. It can be placed above the lower bottom plate 12 and below the nut 6 to reinforce the connection between the bolt 3 and the connecting box 1.

[0043] In this embodiment, the bolt 3 includes a screw 31 and a screw head 32. The lower end of the screw 31 is fixedly connected to the screw head 32, and the upper end of the screw 31 passes through the lower wall 4 and the extended opening 2. The minimum size of the extended opening 2 is slightly larger than the diameter of the screw 31, making it easier for the screw 31 to be inserted into the extended opening 2 and threadedly connected to the nut 6. After the screw 31 is installed in the connecting box 1, the screw head 32 acts as an enlarged head to increase the anchoring force.

[0044] In this embodiment, the bottom of the upper wall 100 is provided with a boss 110, and the connecting box 1 is embedded in the boss 110; the top of the lower wall 4 is provided with a groove 41 that matches the boss 110, and the screw 31 is anchored in the groove 41. When the screw 31 is threadedly connected to the connecting box 1, the boss 110 and the groove 41 are interlocked; the first casting area 120 in the upper wall 100 located above the boss 110 and the second casting area 42 in the lower wall 4 located below the groove 41 are both made of UHPC material, which improves the local strength; the upper wall 100 and the lower wall 4 adopt the structure of boss 110 and groove 41, the connecting box 1 and the screw 31 are installed in the boss 110 and groove 41, the horizontal force is borne by the screw 31 and the concrete, the groove 41 can hinder lateral deformation, and then the UHPC can enhance the force that can be hindered, which can improve the horizontal shear bearing capacity.

[0045] In this embodiment, the number of bolts 3 is three, and the three bolts 3 are equally spaced and parallel to each other in the extended opening 2, forming a parallel structure.

[0046] The specific dimensions of this invention are as follows: The prefabricated wall panel is divided into two sections: an upper wall panel and a lower wall panel 4. The connecting box 1 is 830mm long, 265mm wide, and 265mm high, with a panel thickness of 15mm (excluding the bottom plate). The bottom plate 12 is 30mm thick. The screw 31 has a diameter of approximately 16mm. The limiting post 8 is 30mm thick. The gasket 7 is 5mm thick and has an area of ​​130×130mm. 2 Anchor bar 10, height 516mm, diameter 26mm.

[0047] Scope of application of this invention:

[0048] Bolted connection is a typical dry connection method used in prefabricated concrete shear wall structures in various engineering and construction projects. The new bolted connection prefabricated concrete shear wall connection structure has the characteristics of fast installation, controllable quality, and reliable performance. It is easy to promote and apply in the market, and it has brought about a reduction in the overall construction period and improved the overall benefits.

[0049] The above description is only a part of the embodiments of the present invention and does not limit the scope of protection of the present invention. Any equivalent device or equivalent process transformation made based on the content of the present invention specification and drawings, or direct or indirect application in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A fabricated concrete shear wall connection construction of a parallel box bolted connection, characterized by, The utility model relates to a connecting box embedded in the upper layer wall, a lengthened opening is arranged in the bottom of the connecting box, a plurality of bolts are arranged in the lengthened opening, the bolts are anchored in the lower layer wall, the lower layer wall is attached to the bottom lower surface of the connecting box and abuts against the lengthened opening, a lengthened groove is formed between the lower layer wall and the lengthened opening, nuts are threadedly connected to the bolts, a gasket is arranged between the nuts and the lengthened groove, the gasket is arranged on the bottom upper surface of the connecting box, a plurality of abutting limiting columns are arranged in the lengthened groove, a gap between the limiting columns is filled with a filler, the plurality of bolts are limited by the limiting columns and the filler, a plurality of anchor bars are arranged above the connecting box in parallel, and the upper end of the anchor bar is in a non-linear structure. The non-linear structure is a wave structure or a broken line structure.

2. The panel point connection of claim 1, wherein, The filler is epoxy resin or self-compacting mortar.

3. The panel point connection of claim 1, wherein, The limiting column is made of steel.

4. The panel point connection of claim 1, wherein, The height of the limiting column is 1 / 2 to 1 times the height of the lengthened groove.

5. The panel point connection of claim 1, wherein, The lengthened opening is in a wave structure.

6. The panel point connection of claim 1, wherein, The connecting box comprises an upper top plate, a lower bottom plate, a left side plate, a right side plate and a rear side plate, the upper top plate, the lower bottom plate, the left side plate, the right side plate and the rear side plate form a square structure, the lower bottom plate is provided with a lengthened opening, and the gasket is arranged on the upper surface of the lower bottom plate.

7. The panel point connection of claim 1, wherein, The bolt comprises a screw rod and a screw head, the lower end of the screw rod is fixedly connected to the screw head, the upper end of the screw rod is arranged in the lower layer wall and the lengthened opening and is threadedly connected to the nut.

8. The panel point connection of claim 1, wherein, The bottom of the upper layer wall is provided with a boss, the connecting box is embedded in the boss, the top of the lower layer wall is provided with a groove matched with the boss, the screw rod is anchored in the groove, the boss and the groove are arranged in each other when the screw rod is threadedly connected to the connecting box, and the first pouring area above the boss in the upper layer wall and the second pouring area below the groove in the lower layer wall are made of UHPC material.

9. The panel point connection of claim 8, wherein, The number of the bolts is three, and the three bolts are arranged in the lengthened opening in parallel at equal intervals.

10. The panel point connection of claim 1, wherein, ​

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