Seam pulling structure at joint of fair-faced concrete construction wall and bearing column

Abstract

The utility model relates to the technical field of fair-faced concrete construction, and provides a crack pulling structure at the joint of a fair-faced concrete construction wall and a bearing column, and the crack pulling structure is arranged between the fair-faced concrete construction wall and the bearing column or between the fair-faced concrete construction wall and a beam plate. The seam pulling structure comprises a seam pulling plate, a fixing piece and a positioning steel bar. The joint pulling plate is arranged at the wall end of the bare concrete structure wall; the two ends of the seam pulling plate correspond to the inner side and the outer side of the bare concrete structure wall correspondingly. The two ends of the seam pulling plate are connected with fixing pieces correspondingly, and the fixing pieces are used for being connected with a formwork for constructing the bare concrete construction wall. The positioning steel bars are arranged at at least one end of the seam pulling plate. The crack generation rate is obviously reduced, the influence of the fair-faced concrete construction wall on the overall shock resistance and crack resistance of the main body structure is effectively reduced, and a guarantee is provided for the safety and stability of the structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of fair-faced concrete construction, and in particular relates to a joint structure at the junction of a fair-faced concrete structural wall and a load-bearing column. Background Art

[0002] From style to materials, bare concrete buildings emphasize the sustainability and artistry of design, and focus on developing green buildings and low-energy buildings. The bare concrete structural wall replaces the original masonry wall, with a natural texture as the finishing effect, effectively reducing the workload of masonry and plastering in construction, reducing the risk of wall cracking and water seepage, and improving the overall bare water appearance of the building, which is in line with the core concept of bare concrete buildings.

[0003] There are problems of increased load and changed shear force distribution between the exposed concrete structural wall and the load-bearing column, which directly affects the seismic performance and crack resistance of the structure, resulting in uneven settlement between the structures and cracks. In the existing exposed concrete construction technology, there are too many connections between the exposed concrete structural wall and the load-bearing column, and cracks are easily generated at the intersection edge, which makes it difficult to repair in the later stage, increases the project cost, and reduces the natural texture finishing effect of the exposed concrete. Utility Model Content

[0004] In view of the problems in the prior art, this application proposes a seam structure at the junction of the exposed concrete structural wall and the load-bearing column. The seam structure is used to separate the rigid connection between the exposed concrete structural wall and the beam and slab, and the load-bearing column, effectively avoiding the generation of cracks, reducing construction costs, improving the appearance of the exposed concrete surface, and ensuring the safety and stability of the overall structure.

[0005] The utility model proposes a seam structure at the junction of a plain concrete structural wall and a load-bearing column, wherein the seam structure is arranged between the plain concrete structural wall and the load-bearing column or between the plain concrete structural wall and a beam slab; the seam structure comprises a seam plate, a fixing member and a positioning steel bar; the seam plate is arranged at the wall end of the plain concrete structural wall; the two ends of the seam plate correspond to the inner side and the outer side of the plain concrete structural wall respectively; the two ends of the seam plate are respectively connected with the fixing members, and the fixing members are used to be connected with a template for constructing the plain concrete structural wall; the positioning steel bar is arranged at at least one end of the seam plate.

[0006] Furthermore, grooves are provided at both ends of the seam-stretching plate, and a part of the fixing piece is located in the grooves.

[0007] Furthermore, the fixing member includes an inner template fixing member and an outer template fixing member, the inner template fixing member is arranged at one end of the seam-drawing plate, and the outer template fixing member is arranged at the other end of the seam-drawing plate.

[0008] Furthermore, the inner formwork fixing member includes a long T-shaped fixing member; and the outer formwork fixing member includes an exposed seam strip.

[0009] By using open seam strips as outer formwork fixings at the joint structure, it is ensured that there is no misalignment or leakage between the exposed concrete structural wall and the load-bearing column. After the concrete of the load-bearing column and the exposed concrete structural wall are poured, the straight and flat open seams can be converted into Zen seams, thereby omitting subsequent grouting construction, reducing the risk of structural cracking and later leakage, ensuring the visual effect of the exposed concrete surface, saving repair costs, and having a simple process, which improves construction progress and achieves the purpose of shortening the construction period.

[0010] Furthermore, the seam-stretching structure also includes a non-shrinkage dry-powder mortar layer, and the non-shrinkage dry-powder mortar layer is filled in the space after the long strip T-shaped fixing piece is removed.

[0011] Furthermore, a glass fiber alkali-resistant mesh cloth is arranged in the non-shrinkage dry-mix mortar layer, and the surface of the non-shrinkage dry-mix mortar layer is coated with a plain concrete coloring paint and a plain concrete protective agent.

[0012] Furthermore, parallel inner partitions and outer partitions are respectively arranged on the two plate surfaces of the seam plate; the inner partition is arranged at one end of the seam plate close to the inner template fixing piece, and the outer partition is arranged at one end of the seam plate close to the outer template fixing piece.

[0013] Furthermore, the ends of the inner partition plate and the outer partition plate are provided with hook portions, the hook portion of the inner partition plate is bent toward one end of the inner formwork fixing piece, and the hook portion of the outer partition plate is bent toward one end of the outer formwork fixing piece.

[0014] Furthermore, connecting parts are provided at both ends of the seam-drawing plates, and the connecting parts are used to connect two adjacent seam-drawing plates into an integral structure.

[0015] Furthermore, the seam-stretching plate is in the form of an elongated Z-shaped frame or an elongated I-shaped frame.

[0016] Furthermore, the seam-stretching plate is made of PVC plate.

[0017] By using PVC boards as seam boards, it has the advantages of mass customization, simple structure, convenient construction and economical price. The length of the seam structure can be freely adjusted to adapt to different sizes of plain concrete walls. It can be installed in place at one time, and the construction processes such as template laying can be optimized. The plain concrete structural wall can be cast in one time, which reduces construction costs and ensures the overall project quality.

[0018] The beneficial effects of the utility model are as follows: by adopting a pull-seam structure partition between the fair-faced concrete structural wall and the load-bearing column or beam slab, there is no pull-through connection of steel bars, which changes the load transfer mode, avoids cracks caused by uneven settlement between concretes of different strength grades, significantly reduces the crack generation rate, and effectively reduces the influence of the fair-faced concrete structural wall on the overall seismic resistance and crack resistance of the main structure, providing guarantee for the safety and stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a structural schematic diagram of the vertical arrangement of the tension joint structure between the fair-faced concrete structural wall and the load-bearing column.

[0020] Figure 2 for Figure 1 Schematic diagram of the seam structure after construction is completed.

[0021] Figure 3 The utility model is a schematic structural diagram of the horizontal arrangement of the tension joint structure provided between the exposed concrete structural wall and the beam slab.

[0022] In the figure, 1-fair faced concrete structural wall; 2-load bearing column; 3-beam and slab; 4-formwork; 5-surface layer; 10-vertical seam plate; 11-long T-shaped fixing piece; 12-exposed seam strip; 13-outer partition board; 14-inner partition board; 20-transverse seam plate; 21-groove; 31-non-shrinkage dry powder mortar layer. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figure 1-Figure 3 The seam structure shown is at the junction of the plain concrete structural wall and the load-bearing column, and the seam structure is arranged between the plain concrete structural wall 1 and the load-bearing column 2 or between the plain concrete structural wall 1 and the beam slab 3; the seam structure includes a seam plate, fixings and positioning steel bars; the seam plate is arranged at the wall end of the plain concrete structural wall 1; the two ends of the seam plate correspond to the inner side and the outer side of the plain concrete structural wall 1 respectively; the two ends of the seam plate are respectively connected with fixings, and the fixings are used to connect with the formwork for constructing the plain concrete structural wall 1; the positioning steel bar is arranged at at least one end of the seam plate.

[0025] Grooves 21 are provided at both ends of the seam-drawing plate, and a part of the fixing piece is located in the groove 21 .

[0026] The fixing part includes an inner template fixing part and an outer template fixing part, wherein the inner template fixing part is arranged at one end of the seam drawing plate, and the outer template fixing part is arranged at the other end of the seam drawing plate. Wherein, the template includes an outer template and an inner template, the inner template fixing part is used to fix the inner template, and the outer template fixing part is used to fix the outer template.

[0027] The inner template fixing member includes a long T-shaped fixing member 11; the long T-shaped fixing member 11 is arranged between the seam plate and the inner template, and is used to fix the inner template to ensure that the seam plate is not deviated.

[0028] The outer formwork fixings include exposed seam strips 12 .

[0029] The exposed seam strip 12 is in the shape of a long rectangular strip and is arranged at one end of the seam plate close to the outer formwork. It is used to fix the outer formwork to ensure that there is no misalignment or leakage between the plain concrete structural wall 1 and the load-bearing column 2. A straight and flat open seam can be formed after the concrete of the load-bearing column 2 is poured. After the concrete of the load-bearing column 2 reaches the specified strength, the concrete floating slurry around the open seam strip 12 is cleaned and a 45° bevel is chiseled out. The open seam strip 12 is taken out. After the concrete pouring of the plain concrete structural wall 1 is completed, the open seam is transformed into a Zen seam form and displayed on the plain exterior wall surface to ensure the beautiful effect of the plain wall finishing.

[0030] The seam-pulling structure further includes a non-shrinkage dry-powder mortar layer 31 , which is filled in the space after the long strip T-shaped fixing piece 11 is removed.

[0031] A glass fiber alkali-resistant mesh cloth is arranged inside the non-shrinkage dry-mix mortar layer 31 , and the surface of the non-shrinkage dry-mix mortar layer 31 is coated with a clear water concrete coloring paint and a clear water concrete protective agent.

[0032] The two plate surfaces of the seam plate are respectively provided with an inner partition plate 14 and an outer partition plate 13 which are parallel to each other; the inner partition plate 14 is arranged at one end of the seam plate close to the inner formwork fixing part, and the outer partition plate 13 is arranged at one end of the seam plate close to the outer formwork fixing part. The ends of the inner partition plate 14 and the outer partition plate 13 are provided with a hook part, the hook part of the inner partition plate 14 is bent toward one end of the inner formwork fixing part, and the hook part of the outer partition plate 13 is bent toward one end of the outer formwork fixing part. The hook part can pull the surrounding concrete, increase the bonding force, and improve the displacement resistance of the seam plate.

[0033] Connecting parts are arranged at both ends of the seam-pulling plate, and the connecting parts are used to connect two adjacent seam-pulling plates into an integral structure.

[0034] The seam-stretching plate is in the form of a long Z-shaped frame or a long I-shaped frame.

[0035] like Figure 1 As shown, the seam plate is a long I-shaped frame. Figure 3 As shown, the seam plate is a long Z-shaped frame.

[0036] The seam structure is not limited to the vertical seam structure between the plain concrete structural wall 1 and the load-bearing column 2, but also includes the horizontal seam structure between the bottom of the plain concrete structural wall 1 and the beam slab 3. The vertical seam structure and the horizontal seam structure together constitute the seam structure around the plain concrete structural wall 1, completely separating the structural connection with the load-bearing column 2, ensuring that the overall rigidity of the structure is not affected by the plain concrete structural wall 1, and meeting the assumptions and models of structural calculation. Among them, the seam plates of the vertical seam structure are arranged vertically, such as Figure 1 As shown, the seam plates of the transverse seam structure are arranged transversely, such as Figure 3 In other words, the vertical seam structure includes a vertical seam plate 10, and the horizontal seam structure includes a horizontal seam plate 20. The vertical seam structure and the horizontal seam structure are connected by the connecting parts at their ends.

[0037] The side of the seam board has a large flat area, without any extra protrusions to hinder the construction, providing space for subsequent construction of the exposed concrete structural wall such as steel bar binding and formwork erection.

[0038] The seam board is made of PVC and is white in color. PVC is lightweight, heat-insulating, flame-retardant and moisture-proof. It can be customized to different lengths according to actual construction characteristics, and can also be spliced ​​into the required shape and length.

[0039] The positioning steel bars are set in parallel at both ends of the seam plate, using C8@500 arrangement, and are only used for positioning.

[0040] The steps of constructing the seam structure of this embodiment are as follows:

[0041] Step 1. Measurement and layout: According to the requirements of the drawings, accurately measure the positions of the load-bearing columns 2 and the exposed concrete structural wall 1, accurately locate and carry out the layout operation to ensure that the construction positions of the load-bearing columns 2 and the exposed concrete structural wall 1 are accurate and the construction quality meets the requirements to avoid wall position deviation.

[0042] Step 2: Tie the reinforcement bars of the load-bearing wall and support the formwork. Set open seam strips 12 on the inner surface of the formwork so that straight and smooth open seams can be formed after the concrete is poured.

[0043] Step 3: Installation of positioning steel bars: According to the layout position, C8@500 positioning steel bars are arranged at both ends of the seam plate. The construction process of embedding steel bars is adopted. First, drill holes corresponding to the positions of the positioning steel bars, clean all impurities in the holes, squeeze in adhesive and implant the rust-free positioning steel bars, and strictly follow the process flow of embedding steel bars for construction.

[0044] Step 4, installation of the seam plates: according to the position of the positioning steel bars, install the vertical seam plates 10 and the horizontal seam plates 20. Clean the location before installing the seam plates and install them in place at one time. Use a spirit level to check the flatness of the seam plates and adjust the deviations in time. The joints of the seam plates should be smooth, continuous and flawless to perfectly fit the edges of the components, ensuring that the finished effect of the seam structure of the fair-faced concrete structural wall 1 meets the requirements of fair-faced concrete construction.

[0045] Step 5. Rebar binding of the plain concrete structural wall 1: Carry out the rebar binding construction of the plain concrete structural wall 1. The tying wires are arranged inwardly in a plum blossom shape. Special pads for plain concrete are evenly arranged in a plum blossom shape inside the plain concrete structural wall 1 to ensure that the thickness of the steel bar protective layer meets the design requirements. The steel bars and tying wires must not be rusted to ensure the construction quality of the plain concrete structural wall 1.

[0046] Step 6. Installation of the template for the exposed concrete structural wall 1: The template for the exposed concrete structural wall 1 adopts the Visa template, the exposed seam strip 12 is installed on the outer template, and the long T-shaped fixing piece 11 is installed on the inner template, which fits tightly with the grooves 21 at both ends of the seam plate, creating a precise position for the template installation, and effectively preventing the construction joint from being misaligned or leaking. The template joint position is deepened, and the size of each template is cut according to the deepening drawing. The template joints are tightly combined to ensure the template joint effect. The edge of the template needs to be installed in accordance with the fixings. The template reinforcement uses a steel beam as the main back rib and a "J" beam as the secondary back rib for reinforcement. During installation, the "J" beam is installed close to the template, and the steel beam is installed perpendicular to the "J" beam. It is clamped with tension spirals. In addition, a caster is required to reinforce the template support system to improve the overall stability.

[0047] Step 7, casting and demolding of the plain concrete structural wall 1: after the formwork is installed, clean the concrete slurry around the exposed seam strips 12 on the outside of the wall and chisel out a 45-degree bevel to facilitate the removal of the exposed seam strips 12. After the structural wall is cast, the exposed seams are converted into Zen seams on the plain exterior wall. When pouring concrete, it is necessary to vibrate while pouring, and vibrate each position in place to avoid dog holes and honeycombed surfaces, and cast it in one go. After the plain concrete structural wall 1 reaches the demolding strength, the formwork is removed. During the removal process, the surface effect of the plain concrete structural wall 1 must be protected, and the finished surface layer 5 must not be damaged to ensure the construction quality of the plain concrete.

[0048] Step eight, construction of the non-shrinkage dry-mix mortar layer 31: fill the non-shrinkage dry-mix mortar layer 31 in the space after the long strip T-shaped fixing piece 11 is removed, and a glass fiber alkali-resistant mesh cloth is arranged in the non-shrinkage dry-mix mortar layer 31.

[0049] Step nine, brushing protective agent and color matching: first clean the bare concrete structural wall 1 after demolding, and use water-based translucent special adjustment materials to adjust the color difference of the defect repair position and the position of the seam plate of the bare concrete structural wall 1; the bare concrete protective agent primer and middle coat use two coats of water-based fluorocarbon water repellent for construction to seal the pores of the bare concrete and achieve better water-resistant and alkali-resistant protection effect; the bare concrete protective agent top coat uses two coats of water-based fluorocarbon water repellent for construction to retain the base color of the concrete, without light or highlight, to maintain the original gloss and texture of the bare concrete, and has a good visual effect.

[0050] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A joint structure at the junction of a plain concrete structural wall and a load-bearing column, characterized in that: The seam structure is arranged between the plain concrete structural wall and the load-bearing column or between the plain concrete structural wall and the beam-slab; the seam structure includes a seam plate, a fixing and a positioning steel bar; the seam plate is arranged at the wall end of the plain concrete structural wall; the two ends of the seam plate correspond to the inner side and the outer side of the plain concrete structural wall respectively; the two ends of the seam plate are respectively connected with the fixing, and the fixing is used to be connected with the formwork for constructing the plain concrete structural wall; the positioning steel bar is arranged at at least one end of the seam plate.

2. The joint structure at the junction of a plain concrete structural wall and a load-bearing column according to claim 1, characterized in that: Grooves are arranged at both ends of the seam-drawing plate, and a part of the fixing piece is located in the grooves.

3. The joint structure at the junction of a plain concrete structural wall and a load-bearing column according to claim 1, characterized in that: The fixing part comprises an inner template fixing part and an outer template fixing part. The inner template fixing part is arranged at one end of the seam-drawing plate, and the outer template fixing part is arranged at the other end of the seam-drawing plate.

4. The joint structure at the junction of a plain concrete structural wall and a load-bearing column according to claim 3 is characterized in that: The inner template fixing piece includes a long T-shaped fixing piece; the outer template fixing piece includes an exposed seam strip.

5. The joint structure at the junction of a plain concrete structural wall and a load-bearing column according to claim 4 is characterized in that: The seam-pulling structure also includes a non-shrinkage dry-powder mortar layer, which is filled in the space after the long strip T-shaped fixing piece is removed.

6. The joint structure at the junction of a plain concrete structural wall and a load-bearing column according to claim 5, characterized in that: A glass fiber alkali-resistant mesh cloth is arranged in the non-shrinkage dry-mix mortar layer, and the surface of the non-shrinkage dry-mix mortar layer is coated with a clear water concrete coloring paint and a clear water concrete protective agent.

7. The joint structure at the junction of a plain concrete structural wall and a load-bearing column according to claim 3, characterized in that: The two plate surfaces of the seam-pulling plate are respectively provided with an inner partition plate and an outer partition plate which are parallel to each other; the inner partition plate is arranged at one end of the seam-pulling plate close to the inner template fixing piece, and the outer partition plate is arranged at one end of the seam-pulling plate close to the outer template fixing piece.

8. The joint structure at the junction of a plain concrete structural wall and a load-bearing column according to claim 7, characterized in that: The ends of the inner partition plate and the outer partition plate are provided with hook portions, the hook portion of the inner partition plate is bent toward one end of the inner formwork fixing member, and the hook portion of the outer partition plate is bent toward one end of the outer formwork fixing member.

9. The joint structure at the junction of a plain concrete structural wall and a load-bearing column according to claim 1, characterized in that: Connecting parts are provided at both ends of the seam-pulling plate, and the connecting parts are used to connect two adjacent seam-pulling plates into an integral structure.

10. The joint structure at the junction of a plain concrete structural wall and a load-bearing column according to claim 1, characterized in that: The seam-stretching plate is in the form of an elongated Z-shaped frame or an elongated I-shaped frame.

Images