CN110777983A - Synchronous construction structure and method for concrete filled wall and cast-in-place structure - Google Patents

Abstract

The invention discloses a synchronous construction structure and method of a concrete infill wall and a cast-in-place structure. The synchronous construction structure includes structural beams surrounding the infill wall and shear walls on both sides, and steel bars are distributed horizontally and vertically in the infill wall. Between the vertical sides of the infill wall and the shear wall, and between the lower side of the infill wall and the lower side structural beams, separate joints are formed by setting plastic backing plates, and there is no separation joint concrete between the top of the infill wall and the upper side structural beams. After pouring, they are connected as a whole, and the filling wall of the present invention is separated from the original structure by the structural separation joint material to realize the soft connection and restore the structural rigidity. The anti-seismic effect is achieved by using the anchoring steel bar and the separation joint material connected to the top of the concrete structure as the damping device.

Description

Synchronous construction structure and method for concrete filled wall and cast-in-place structure

technical field

The invention relates to building construction, in particular to a synchronous construction of a concrete filling wall and a cast-in-place structure

structure and method.

Background technique

The infill wall is an important enclosure and separation component in the structure. Traditional infill walls are often built with blocks, which need to be implemented after the concrete structure is fully or partially completed. Sills, structural columns or core columns, ring beams, lintels, tie beams, horizontal tie bars, etc. require secondary construction, electrical conduits, junction boxes, etc. need to be interspersed with infill wall masonry, and walls often need plastering, etc. Not only is the process interspersed with cumbersome, but also prone to common quality problems.

Although there is a method for completing the infill wall by concrete recently, such as the "Infill Wall Forming Method and the Infill Wall" of the publication number CN 107386502 A, the method is to support the formwork pouring the infill wall on the structural frame that has been poured and formed, there is a need to set Since the steel bars connected to the poured structural frame are not poured at the same time as the structural frame, there is a problem of inconsistent shrinkage of the connection joints with the poured structural frame after pouring, resulting in a large connection gap, which brings more workload for subsequent processing.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a synchronous construction structure of concrete infill wall and cast-in-place structure and

Method, the concrete infill wall and the cast-in-place structure are poured at the same time to avoid shrinkage cracks at the junction of the two base materials, and part of the stress is released at the structural separation joints, effectively reducing plastering hollowing, cracking, external wall leakage and other common quality problems.

In order to achieve the above object, the technical scheme of the present invention is:

A synchronous construction structure of a concrete infill wall and a cast-in-place structure includes structural beams around the infill wall and shear walls on both sides, steel bars are distributed horizontally and vertically in the infill wall, and the two sides of the infill wall are vertically connected with shear walls. Between the force walls and between the lower side of the filling wall and the lower structural beams, separate joints are formed by setting backing plates, and there is no separation joint between the top of the filling wall and the upper structural beams. The infill wall positioning and fixing steel bars are respectively arranged on both sides in the width direction of the joint plate, wherein the horizontal positioning and fixing steel bars extend into the infill wall and the shear wall respectively, and are bound and fixed by the vertical steel bars on the outer and middle sides of the infill wall and the shear wall. The positioning and fixing steel bars extend into the infill wall and the lower side structural beams respectively and are bound and fixed with the outer horizontal steel bars. The vertical reinforcement bars distributed in the infill wall extend into the upper side structural beams to form anchoring steel bars, and the anchoring ends of the anchoring steel bars are connected to The horizontal steel bars in the upper structural beam are bound together, and a steel wire mesh is arranged on the outside of the horizontally positioned and fixed steel bars, and the steel wire mesh extends into the filling wall and the shear wall.

The scheme is further: the horizontal positioning and fixing steel bars and the vertical positioning and fixing steel bars are respectively set through the backing plate, or the width of the backing plate is smaller than the width of the infill wall, and the horizontal positioning and fixing steel bars and the vertical positioning and fixing steel bars are respectively arranged through the backing plate. The reinforcing bars are respectively arranged outside the two sides of the backing plate.

The scheme is further: the vertical reinforcing bars in the infill wall bound with the reinforcing bars in the upper structural beam are all vertical reinforcing bars distributed in the infilling wall, and the vertical reinforcing bars extend into the upper structural beam. The length is not less than the length of the anchoring end.

The solution is further: the steel wire mesh and the horizontal positioning steel bars are fixed by binding.

The scheme is further as follows: the vertical reinforcing bars in the infill wall are arranged in two rows in the thickness direction of the infilling wall, the bottoms of the two rows of vertical reinforcing bars are connected in a U-shape, and the horizontal reinforcing bars are bound together with the vertical reinforcing bars at intervals.

A construction method based on the synchronous construction structure of the concrete infill wall and the cast-in-place structure, the shear wall, infill wall, and upper side structural beams of the same layer are bound with steel bars, and the shear wall, infill wall, and upper side of the same layer are supported. The structural beam formwork is characterized in that, after the shear wall, the filling wall and the upper structural beam formwork are supported, the concrete of the shearing wall, the filling wall and the upper structural beam is synchronously poured.

The plan is further as follows: after the reinforcement of the shear wall and the infill wall is bound, insert the spacer plate, and then perform the binding of the horizontally positioned and fixed steel bars, and after the binding of the horizontally positioned and fixed steel bars is completed, the steel mesh is fixed and bound.

The scheme is further as follows: when the horizontally positioned and fixed steel bars are set through the separation joint pad, firstly drill holes on the separation joint pad according to the distribution size of the horizontally positioned and fixed steel bars, and the reinforcement bars of the shear wall and the infill wall are bound. After the completion, insert the partition joint plate and then insert the horizontal positioning fixed steel bar into the partition joint plate to bind.

The scheme is further as follows: the vertical reinforcing bars in the infill wall are arranged in two rows in the thickness direction of the infill wall, the bottoms of the two rows of vertical reinforcing bars are connected in a U shape, and the horizontal reinforcing bars in the infill wall are 50mm from the U-shaped end. Start separation settings.

The plan is further: the concrete is poured in layers, the thickness of each layer is not greater than 1.25 times the length of the action part of the vibrating rod, the front end of the vibrating rod is inserted into the concrete of the previous layer, and the insertion depth is not less than 50mm; the vibrating rod is perpendicular to the The concrete surface shall be vibrated evenly by fast insertion and slow pulling; when there is no obvious collapse on the concrete surface, cement slurry appears, and no air bubbles appear, the vibration of this part shall be terminated; when the vibrating rod is close to the formwork, the distance between the vibrating rod and the formwork shall not be greater than the vibration 50% of the action radius of the rod; the spacing of the vibrating insertion points is not greater than 1.4 times the action radius of the vibrating rod.

The beneficial effects of the present invention are:

In terms of structural performance: the structure and method are partitioned between the infill wall and the original structure through the structural separation joint material to achieve a soft connection and restore the structural rigidity. The anti-seismic effect is achieved by using the anchoring steel bar and the separation joint material connected to the top of the concrete structure as the damping device.

In terms of quality control: the structure and method infill wall and the original structure are both made of concrete and are simultaneously poured and formed at one time to avoid shrinkage cracks at the junction of the two base materials, and part of the stress is released at the structure separation joint, effectively reducing plastering voids Bulging, cracking, external wall leakage and other common quality problems. When the separation joint is made of PVC-U pad material, the "flange" lengthens the penetration path of the water flow and enhances the waterproof effect. The electrical conduits (boxes) in the concrete-filled wall are pre-buried synchronously, which can effectively avoid the later slotting phenomenon of the masonry-filled wall.

In terms of schedule control: the structure and method are constructed simultaneously with the concrete structure, without the need for later insertion operations; it reduces the number of masonry, concrete sills at the bottom of water rooms, structural columns, lintels, ring beams, tie beams, horizontal tie bars, and walls. Body plastering and other processes reduce the interspersed between processes, reduce the difficulty of management, improve production efficiency and save construction time.

In terms of green and safe construction: Compared with masonry infill walls, external wall masonry and plastering are no longer required, which reduces the amount of external scaffolding construction works and reduces the number of side openings. Especially for projects using climbing frames, the external wall structure can be climbed along with it. The frame is completed at one time, which reduces the source of danger; compared with the masonry infill wall, there is no damage or leftover blocks, no masonry mortar landing ash problem, no excess maintenance water loss of the infill wall, saving energy consumption for material transportation, in line with green construction requirements policy concept. In terms of cost control: since the corresponding parts no longer need to construct infill wall masonry, it saves the time required for vertical transportation equipment, external scaffold rental costs, masonry and piping, etc., which are occupied by the transportation of blocks, mortar and other materials. The amount of repair work and temporary labor for quality defects are reduced, which effectively saves construction costs.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is the structure schematic diagram of the present invention;

Fig. 2 is the cross-sectional structure schematic diagram of filling wall of the present invention;

Fig. 3 is the structure schematic diagram of the separation joint between the filling wall and the shear wall of the present invention;

FIG. 4 is a schematic structural diagram of the separation joint between the filling wall and the lower side structural beam according to the present invention.

Detailed ways

A synchronous construction structure of a concrete infill wall and a cast-in-place structure, as shown in Figure 1, Figure 2, Figure 3 and Figure 4, the synchronous construction structure of the concrete infill wall and the cast-in-place structure comprises an upper side structural beam surrounding the infill wall 1 2. The lower side structural beam 3 and the left side shear wall 4 and the right side shear wall 5 on both sides, Figure 1 shows the three-story structure, including the upper layer infill wall and the lower layer infill wall, the upper side structure here Beam 2 and lower side structural beam 3 are relative to each layer, therefore, as the upper side structural beam of the middle layer, in the upper layer is the lower side structural beam of the upper layer infill wall, and the upper and lower side structural beams include side structural beams. The upper and lower side structural beams of the walls and the upper and lower side structural beams in the middle of each floor. As shown in Figure 2, Figure 3 and Figure 4, horizontal reinforcement bars 6 and vertical reinforcement bars 7 are distributed in the infill wall. A separation seam is formed by setting the backing plate 8 between them. The thickness of the backing plate is determined according to the size of the separation seam on site. The backing plate uses a plastic backing plate. The separation seam in this embodiment requires 20mm to 25mm. Therefore, the separation seam is composed of two layers of PVC The plastic plate and the intermediate PVC skeleton are combined into one. There is no separation joint between the top of the infill wall and the upper structural beam, and the concrete is synchronously poured and connected as a whole. The synchronous pouring refers to continuous pouring. This structure has an anti-seismic effect, and its anti-vibration method is similar to that of a rocking wall system. Infill wall positioning and fixing steel bars 9 are respectively provided on both sides of the width direction of the separation joint pad, wherein the horizontal positioning and fixing steel bars extend into the infill wall and shear force respectively. The middle and outer vertical steel bars in the wall and the infill wall and the shear wall are bound and fixed, and the vertical positioning and fixing steel bars extend into the infill wall and the lower structural beam respectively and are bound and fixed with the outer horizontal steel bars. The steel bar extends into the upper structural beam to form a right-angled L-shaped anchoring steel bar 11 (the bending is not shown in Figure 4 because it is longitudinal). The horizontal reinforcement bars are bound together, and the vertical reinforcement bars in the infill wall that are bound together with the reinforcement bars in the upper structural beam are all vertical reinforcement bars distributed in the infill wall, and the vertical reinforcement bars extend into the upper The length in the side structural beam is not less than the length of the anchorage end. As shown in FIG. 3 , a steel wire mesh 10 is provided outside the horizontal positioning and fixing steel bars, the steel wire mesh extends into the filling wall and the shear wall, and the steel wire mesh and the horizontal positioning steel bar are fixed by binding.

Among them: according to the construction needs, the backing plate has two width structures. One is that the width of the backing plate is equal to the width of the filling wall, the horizontal positioning and fixing steel bars and the vertical positioning and fixing steel bars are respectively set through the backing plate, and the other is that the width of the backing plate is equal to the width of the filling wall. One is that the width of the backing plate is smaller than the width of the filling wall, and the horizontal positioning and fixing steel bars and the vertical positioning and fixing steel bars are respectively arranged close to the backing plate on both sides of the backing plate.

In the embodiment, as shown in Figure 4: the vertical reinforcement bars 7 in the infill wall are arranged in two rows in the thickness direction of the infill wall, the bottoms of the two rows of vertical reinforcement bars are connected in a U-shape, and the horizontal reinforcement bars are spaced and bound with the vertical reinforcement bars. together. Among them, as shown in FIG. 2 , the horizontal steel bars 6 are bound together with the vertical steel bars in an L-shape at one end.

The following is a construction method based on the above-mentioned synchronous construction of the concrete infill wall and the cast-in-place structure. The shear wall, infill wall, and upper side structural beams on the same layer are bound with steel bars to support the shear wall, infill wall, and upper side of the same layer. Structural beam formwork, after the shear wall, infill wall, and upper side structural beam formwork are supported, the concrete of the shear wall, infill wall, and upper side structural beam is synchronously poured.

In the process of reinforcing steel bar binding: firstly bind the reinforcing bars of the shear wall and the infill wall, insert the spacer plate after the bar binding of the shear wall and the infill wall is completed, and then perform the horizontal positioning and fixing of the reinforcing bars, and then fix the horizontal positioning and fixing After the binding of the steel bars is completed, the fixed binding of the steel mesh is carried out.

When the horizontally positioned and fixed steel bars are set through the separation joint pad, first drill holes on the separation joint pad according to the distribution size of the horizontally positioned and fixed steel bars, and then insert the partitions after the reinforcement of the shear wall and the infill wall is bound. After seam the backing plate, insert the horizontal positioning fixed steel bar into the separation seam backing plate and tie it.

Wherein: the vertical reinforcement bars in the infill wall are arranged in two rows in the thickness direction of the infill wall, the bottoms of the two rows of vertical reinforcement bars are connected in a U shape, and the horizontal reinforcement bars in the infill wall are separated 50mm from the U-shaped end. set up.

In the process of concrete pouring: the concrete is poured in layers, and the thickness of each layer is not greater than 1.25 times the length of the action part of the vibrating rod. The front end of the vibrating rod is inserted into the concrete of the previous layer, and the insertion depth is not less than 50mm; It is perpendicular to the concrete surface and vibrates evenly by fast insertion and slow pulling; when there is no obvious collapse on the concrete surface, cement slurry appears, and no air bubbles are formed, the vibration of this part is terminated; when the vibrating rod is close to the formwork, the distance between the vibrating rod and the formwork is not equal. It is greater than 50% of the action radius of the vibrating rod; the distance between the vibrating insertion points is not greater than 1.4 times the action radius of the vibrating rod.

In this embodiment, flexible materials are arranged at the horizontal and vertical joints below and on both sides between the reinforced concrete infill wall and the structure as structural separation joints, and positioning steel bars are arranged on both sides of the vertical separation joints to fix the flexible materials. The positioning and anchoring steel bars are arranged on the top of the structure, the vertical and horizontal distribution bars are installed in the filling walls, and the barbed wire is bound on the outside of the structural separation joints. It realizes the simultaneous construction of the non-structural body and the structural body of the infill wall, and has the effect of crack resistance and waterproofing.

In the embodiment, the horizontal separation joint pad of the filling wall and the lower structural beam adopts the method of penetrating and fixing the vertical positioning and fixing steel bars of the wall. First, according to the spacing of the positioning and fixing steel bars, the structural separation joint pad is drilled by mechanical drilling. The diameter of the hole should be 2-3mm larger than the diameter of the steel bar, then insert the backing plate into the vertical positioning and fixing steel bar, and then tie the steel bar of the filling wall this time. . The vertical steel bars at the bottom of the concrete infill wall are U-shaped. First, bind the U-shaped steel bars and the first horizontal bar to the positioning and fixing steel bars. There are no less than 3 binding buckles within the overlapping range of the U-shaped steel bars and the positioning and fixing steel bars. Buckle, the starting size of the horizontal bar is 50mm, and then the reinforcement of the wall on the infill wall is bound. Ladder bars are set in the process of bundling the reinforcement of the infill wall, and the horizontal reinforcement of the infill wall is broken on both sides in the thickness direction of the vertical structure separation seam. During the process of bundling the wall, attention should be paid to the cooperation of relevant professionals, and the water and electricity reserves should be pre-buried in time. After the reinforcement of the side wall is bound, the vertical separation joint material is placed in to avoid damage to the material during the reinforcement of the reinforcement. The two sides of the width direction of the separation seam material are bound and positioned to fix the steel bars, and the first row of vertical steel bars on both sides of the width direction of the separation seam are bound with an eight-character buckle, and then the outer sides of the fixed steel bars are bound to a high galvanized steel wire mesh. For the horizontal construction joints on the lower layers of the outer wall, the formwork shall have measures to prevent misplacement and formwork expansion. For the horizontal construction joints on the inner wall, paste 1cm thick and 3cm wide and long sponge strips 5mm outside the position line of the elasticized formwork on the floor before the formwork is supported to prevent the gap between the formwork and the floor from leaking.

After the pouring is completed, the dismantling of each component formwork must first meet the requirements of dismantling strength. When the wall formwork is removed at normal temperature, the concrete strength should be no less than 1.2MPa, so that the concrete strength can ensure that its surface and edges and corners are not damaged due to the removal of the formwork. When using a crowbar, avoid contact with the concrete surface, do not use a hammer or other tools to violently hit the formwork surface, and pay attention to the finished product protection of concrete and separation joint materials.

Claims (10)

1. A synchronous construction structure of a concrete infilled wall and a cast-in-place structure comprises a structural beam surrounding the infilled wall and the lower side of the infilled wall and shear walls on two sides, wherein reinforcing steel bars are distributed in the infilled wall horizontally and vertically, and are characterized in that a separation seam is formed between the vertical two sides of the infilled wall and the shear walls and between the lower side of the infilled wall and the structural beam on the lower side of the infilled wall respectively by arranging backing plates, the upper end of the infilled wall and the structural beam on the upper side are not provided with the separation seam, the concrete is connected into a whole after being synchronously poured, and infilled wall positioning and fixing reinforcing steel bars are respectively arranged on two sides of the separation seam in the width direction of the backing plates, wherein the horizontal positioning and fixing reinforcing steel bars respectively extend into the infilled wall and the shear walls to be bound and fixed with the outer side vertical reinforcing steel bars in the infilled wall and the shear walls, the vertical positioning and fixing reinforcing, the anchoring end of the anchoring steel bar is bound with the horizontal steel bar in the upper side structural beam, a steel wire mesh is arranged on the outer side of the horizontal positioning fixed steel bar, and the steel wire mesh extends into the filler wall and the shear wall.

2. The concrete filled wall and cast-in-place structure synchronous construction structure according to claim 1, wherein the horizontal positioning fixing steel bars and the vertical positioning fixing steel bars are respectively arranged through the backing plate, or the width of the backing plate is smaller than that of the filled wall, and the horizontal positioning fixing steel bars and the vertical positioning fixing steel bars are respectively arranged outside two sides of the backing plate.

3. The concrete infilled wall and cast-in-place structure synchronous construction structure of claim 1, characterized in that, the vertical reinforcing bars in the infilled wall tied together with the reinforcing bars in the upper side structural beams are all vertical reinforcing bars distributed in the infilled wall, and the length of the vertical reinforcing bars extending into the upper side structural beams is not less than the anchoring length of the anchoring ends.

4. The concrete filled wall and cast-in-place structure synchronous construction structure of claim 1, wherein the steel wire mesh and the horizontal positioning steel bars are fixed by binding.

5. The synchronous construction structure of a concrete filled wall and a cast-in-place structure according to claim 1, wherein the vertical steel bars in the filled wall are arranged in two rows in the thickness direction of the filled wall, the bottoms of the two rows of vertical steel bars are connected in a U shape, and the horizontal steel bars are bound together with the vertical steel bars at intervals.

6. A construction method based on the synchronous construction structure of the concrete filled wall and the cast-in-place structure of claim 1 is characterized in that the shear wall, the filled wall and the upper side structural beam formwork on the same layer are bound by steel bars, and the shear wall, the filled wall and the upper side structural beam formwork on the same layer are supported.

7. The method as claimed in claim 6, wherein the spacer plate is inserted after the reinforcement of the shear wall and the filler wall is bound, then the horizontal positioning fixing reinforcement is bound, and the steel wire mesh is fixed and bound after the horizontal positioning fixing reinforcement is bound.

8. The method of claim 7, wherein when the horizontal positioning fixing steel bars are arranged through the parting joint backing plate, the parting joint backing plate is drilled according to the distribution size of the horizontal positioning fixing steel bars, and after the steel bars of the shear wall and the filler wall are bound, the horizontal positioning fixing steel bars are inserted into the parting joint backing plate and then bound.

9. The method as claimed in claim 6, wherein the vertical reinforcing bars in the infilled wall are arranged in two rows in the thickness direction of the infilled wall, the bottoms of the two rows of vertical reinforcing bars are connected in a U shape, and the horizontal reinforcing bars in the infilled wall are arranged at intervals starting from the U-shaped end by 50 mm.

10. The method of claim 6, wherein the concrete is cast in layers, the thickness of each layer of the concrete is not more than 1.25 times of the length of the action part of the vibrating rod, the front end of the vibrating rod is inserted into the concrete cast in the previous layer, and the insertion depth is not less than 50 mm; the vibrating spear is vertical to the concrete surface and is quickly inserted and slowly pulled to be uniformly vibrated; when the concrete surface has no obvious collapse, cement paste appears and bubbles no longer appear, the vibration of the part is finished; when the vibrating spear approaches the template, the distance between the vibrating spear and the template is not more than 50% of the action radius of the vibrating spear; the distance between the vibrating insertion points is not more than 1.4 times of the action radius of the vibrating rod.

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