CN215406707U - Adopt local cast-in-place combination formula precast concrete wall body of connecting - Google Patents

Adopt local cast-in-place combination formula precast concrete wall body of connecting Download PDF

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Publication number
CN215406707U
CN215406707U CN202120522224.4U CN202120522224U CN215406707U CN 215406707 U CN215406707 U CN 215406707U CN 202120522224 U CN202120522224 U CN 202120522224U CN 215406707 U CN215406707 U CN 215406707U
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wall
shear wall
cast
superposed
shear
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许晓春
顾建群
孙良君
顾盛
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Suzhou Wujiachen Construction Industry Co ltd
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Suzhou Wujiachen Construction Industry Co ltd
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Abstract

The utility model discloses a combined precast concrete wall body adopting local cast-in-place connection, which comprises a shear wall, a light filler wall and a superposed beam which are integrally precast, wherein the shear wall, the light filler wall and the superposed beam are cast to form a whole body and have consistent thickness; the bottom of the shear wall is matched with the bottom of the light filling wall to form a step structure, the bottom of the shear wall is provided with a retraction part and forms a cast-in-place connection area, vertical steel bars are arranged in the shear wall, one end of each vertical steel bar extends out of the bottom of the shear wall, and the other end of each vertical steel bar penetrates through a superposed beam at the top of the shear wall and extends out of the superposed beam. The utility model has the advantages of high preparation quality, high flatness of the surface of the wall body, no plastering in the later period, high assembly efficiency, cast-in-place connection of the connection nodes and safe and reliable connection quality.

Description

Adopt local cast-in-place combination formula precast concrete wall body of connecting
Technical Field
The utility model relates to the technical field of fabricated buildings, in particular to a combined precast concrete wall adopting local cast-in-place connection.
Background
The prefabricated building means that part or all of components and parts of the building are produced in a prefabrication factory and then transported to a construction site, and the components are assembled by adopting a reliable connection mode and a mounting machine to form the building with the design and use functions. Compared with the construction of a cast-in-place structure, the prefabricated structure has the advantages of convenience in construction, high engineering progress, small influence on the surrounding environment, easiness in ensuring the quality of building components and the like. The fabricated concrete structure has positive significance for promoting the urban construction process, improving the engineering quality, promoting energy conservation and emission reduction, improving the living environment, changing the production mode of the construction industry and the like.
At present, the vertical connection of the domestic fabricated concrete structure mostly adopts steel bar sleeve grouting connection, and the steel bar butt joint connection mode is realized by inserting steel bars into metal sleeves pre-embedded in precast concrete members and pouring high-strength and micro-expansion cement-based grouting materials.
The connection node of the prefabricated part is a theoretical weak link of the prefabricated concrete structure, and the quality of the connection quality of the node directly influences the quality and the safety of the structure. However, in the actual engineering, because the operation is not standard, the water consumption exceeds the design value of the product when the grouting material is stirred, so that the water cement ratio of the grouting material is increased, even the phenomenon that the grouting material is poor in quality is caused, and the compressive strength of the grouting material is directly reduced; the conditions of slurry leakage and less grouting can occur due to low machining precision of components or improper operation of constructors, and if the grouting inside the sleeve is not full, the connection of the steel bars cannot reach the expected performance; the phenomenon that lower-section steel bars cannot be in place due to component production or field installation deviation and the phenomenon that the lower-section steel bars are cut off individually can also occur, so that no lower-section steel bars exist in the sleeve, and the sleeve cannot be connected even if the sleeve is fully grouted. When the grouting material has insufficient strength, insufficient grouting and insufficient steel bar anchoring length, the overall performance of the structure can be affected if proper treatment is not carried out, and the structure safety is adversely affected.
On the other hand, in the existing fabricated concrete shear wall structure, the precast concrete shear wall and the precast lightweight filler wall are separately manufactured and relatively independent, the precast concrete shear wall is firstly installed to form a main body structure, and then the installation construction of the precast lightweight filler wall is carried out. The forming quality of the light filling wall cannot meet the plastering-free requirement, and a plastering layer and a hanging anti-cracking net must be arranged in a connecting area of the precast concrete shear wall and the precast light filling wall to prevent the precast light filling wall from cracking, so that the precast concrete shear wall and the precast light filling wall are both provided with the plastering layer of the whole wall, and the precast concrete shear wall and the precast light filling wall are arranged on the same plane to meet the decoration effect. In fact, the molding quality of the precast shear wall can meet the plastering-free requirement, and according to the existing construction process, the precast shear wall which originally does not need plastering is forced to be plastered on the whole wall, so that the defects of material waste, high cost, complex construction and long construction period exist.
Therefore, it is urgently needed to develop a combined type precast concrete wall body adopting local cast-in-place connection so as to effectively control the vertical connection quality of the precast load-bearing wall, and integrally precast and synchronously install the precast light filler wall, so that the construction efficiency and the installation quality of the fabricated building are further improved.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide the combined precast concrete wall body adopting local cast-in-place connection, which has the advantages of high preparation quality, high surface flatness of the wall body, no plastering in the later period, high assembly efficiency, cast-in-place connection of connection nodes and safe and reliable connection quality.
In order to solve the technical problems, the utility model provides a combined precast concrete wall body adopting local cast-in-place connection, which comprises a shear wall, a light filler wall and a superposed beam which are integrally precast, wherein the shear wall, the light filler wall and the superposed beam are cast to form a whole body and have consistent thickness; the bottom of the shear wall is matched with the bottom of the light filling wall to form a step structure, the bottom of the shear wall is provided with a retraction part and forms a cast-in-place connection area, vertical steel bars are arranged in the shear wall, one end of each vertical steel bar extends out of the bottom of the shear wall, and the other end of each vertical steel bar penetrates through a superposed beam at the top of the shear wall and extends out of the superposed beam.
Furthermore, the light filling wall is composed of a reinforced concrete structural frame and a plurality of autoclaved light aerated concrete blocks, the autoclaved light aerated concrete blocks are distributed in the grids in the reinforced concrete structural frame, and the thickness of the autoclaved light aerated concrete blocks is consistent with that of the shear wall.
Furthermore, the sum of the axial length of the vertical steel bars of the cast-in-place connecting area and the design thickness of the composite floor slab is the length of a lap joint space, and the length of the lap joint space is larger than the design length required by lap joint of the vertical steel bars between two adjacent shear walls.
Furthermore, the length of the vertical steel bars of the shear wall extending out of the bottom of the shear wall is less than the length of the lap space and is 10-15 mm.
Furthermore, the length of the vertical steel bars of the shear wall extending out of the superposed beam is less than the length of the lap space and is 10-15 mm.
Furthermore, the beam stirrups in the superposed beam are convexly arranged on the upper pouring surface of the superposed beam, and the height of the bulges is lower than the upper surface of the prefabricated floor slab assembled on the superposed beam; and beam bottom ribs in the superposed beams extend out of two ends of the superposed beams, and the extending parts are L-shaped and are used for anchoring into cast-in-place connecting sections between the superposed beams and other prefabricated walls.
Further, the transverse distribution ribs of the shear wall extend out of one side face of the shear wall, and the extending part is U-shaped.
Furthermore, embedded hanging nails are arranged in the superposed beam and are arranged along the vertical direction; the shear wall and the light filling wall are provided with embedded nuts for supporting and are arranged along the horizontal direction.
The utility model has the beneficial effects that:
1. the whole factory prefabrication and field installation of the inner wall and the outer wall of the house (except the floor overlapping layer and the shear wall connecting node).
2. The method comprises the steps of light infilled walls, superposed beams and shear walls, integrated design, factory prefabrication and field installation.
3. The vertical steel bar connection is in lap joint according to the tradition, does not need the sleeve, reduces field installation technical requirement and reduces the steel quantity simultaneously, and the construction is more convenient, and engineering quality easily controls.
4. The filler wall, the superposed beam and the shear wall are integrally prefabricated, so that the connection is more reliable, the integrity of the member is higher, and the earthquake resistance of the house is stronger.
5. All walls in the design are prefabricated in factories, wall masonry and twice structural construction are not needed in a construction site, site construction templates and construction labor are reduced to the maximum extent, material loss is reduced, construction flying dust is reduced, construction water is reduced, and green construction is achieved.
6. The filler wall is prefabricated in a factory, no filler wall is constructed on a construction site, and common quality problems existing in traditional construction are essentially avoided.
7. After the main part construction is accomplished, only need to hang the net and criticize putty, reduce a large amount of materials and the recruitment of whitewashing, increase the usage space when avoiding whitewashing the quality general illness on the scene.
8. The integral assembly rate is improved to 70-80%, the construction period can be shortened by 10-20%, other components except for the on-site reinforcement binding and concrete pouring of the connecting nodes are all prefabricated in factories, the engineering quality is less influenced by climate and manpower, the durability of the components is longer, and the whole process of the whole quality is controlled and traceable.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic view of a connection structure between two adjacent shear walls according to the present invention;
fig. 4 is a schematic cross-sectional structure of the present invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1 to 4, an embodiment of the combined precast concrete wall body adopting local cast-in-place connection according to the present invention includes an integrally precast shear wall 1, a lightweight filler wall 2, and a composite beam 3, the shear wall, the lightweight filler wall, and the composite beam are cast to form an integral body and have uniform thickness, specifically, reinforcement cages of the shear wall, the lightweight filler wall, and the composite beam are placed on the same casting platform and are bound and fixed to form an integral body, and then the integral body is cast in a unified manner to achieve the effect of integrally precast to form an integral body. The shear wall and the light infilled wall are adjacently arranged on the left and right sides, and the superposed beams are arranged above the shear wall and the light infilled wall and accord with the arrangement of wall structures.
The bottom of the shear wall is matched with the bottom of the light filling wall to form a step structure, the bottom of the shear wall is provided with a retraction part and forms a cast-in-place connecting area 4, vertical steel bars 5 are arranged in the shear wall, one end of each vertical steel bar extends out of the bottom of the shear wall, the other end of each vertical steel bar penetrates through a superposed beam at the top of the shear wall and extends out of the superposed beam, the cast-in-place connecting area can ensure that adjacent vertical steel bars can be in lap joint connection under the wrapping of concrete when the superposed assembly is carried out, the operation is convenient, when the integral assembly is carried out, the superimposed floor slab between the upper light infilled wall and the lower superimposed beam in the two adjacent wall bodies is poured in advance, the part of the composite floor slab corresponding to the cast-in-place connecting area is not poured, then the light filler wall of the wall body is directly contacted with the floor slab to be hoisted and placed, the cast-in-place connecting area exists after the light filler wall is in place, and the size of the cast-in-place connecting area is fixed, so that the construction quality is stable; the sum of the axial length of the cast-in-place connecting area along the vertical reinforcing steel bars and the design thickness of the laminated floor slab is the lap joint space length which is larger than the design length required by lap joint of the vertical reinforcing steel bars between two adjacent shear walls, so that the connecting strength between the adjacent reinforcing steel bars after concrete pouring and hardening is ensured. The length of the vertical reinforcing steel bars of the shear wall extending out of the bottom of the shear wall is limited to be smaller than the length of the lap space and is 10-15 mm, the length of the vertical reinforcing steel bars of the shear wall extending out of the lap beam is smaller than the length of the lap space and is 10-15 mm, the thickness space of the laminated floor slab is skillfully borrowed when the shear wall is assembled in a laminated mode, the extending length of the vertical reinforcing steel bars is shortened, the problem that the reinforcing steel bars are easy to bend in the transportation and assembly processes is effectively solved, the cast-in-place space is reduced, the number of formwork erection is reduced, the concrete consumption for cast-in-place use can be reduced, and the construction efficiency and quality are improved.
The light infilled wall consists of a reinforced concrete structural frame 6 and a plurality of autoclaved lightweight aerated concrete blocks 7 which are distributed in grids in the reinforced concrete structural frame, when in preparation, the reinforcement cages in the shear wall, the superposed beam and the light filling wall can be bound firstly, then the steel reinforcement cages are placed on a pouring mould table, the steel reinforcement cages with the three structures are bound together to form a whole before pouring, when binding, a plurality of avoiding blank spaces are reserved on the light filling wall, before pouring, the autoclaved lightweight aerated concrete block is placed on a pouring mould platform corresponding to the avoiding blank spaces, and then pouring is carried out to form a shear wall, a superposed beam and the light filling wall, the autoclaved lightweight aerated concrete blocks are prepared in advance, and the reinforced concrete structural framework is combined with the autoclaved lightweight aerated concrete blocks into a whole through pouring concrete for pouring to obtain a lightweight filler wall;
the thickness of the autoclaved lightweight aerated concrete block is consistent with that of the reinforced concrete structural frame, and the evenness of the surface after preparation and forming is guaranteed to be consistent, namely in the preparation process, the thickness of the reinforced concrete structural frame is consistent with that of the autoclaved lightweight aerated concrete block, the autoclaved lightweight aerated concrete block is placed on a pouring mould table at the bottom due to the limitation of the pouring mould table, so that one surface of the filling wall can be guaranteed to be flat, the other surface of the filling wall is flush with the other surface of the autoclaved lightweight aerated concrete block through the limitation of the pouring thickness, and both surfaces of the filling wall can meet the evenness, the filling wall is of an integral structure, and the effect of avoiding plastering after the problems of unevenness, connection dislocation and the like do not exist.
In the structure prepared by the method, the lightweight infilled wall is provided with the reinforced concrete structural framework, so that the strength is high, the earthquake resistance and crack resistance are excellent, the autoclaved lightweight aerated concrete blocks in the reinforced concrete structural framework can ensure that the reinforced concrete structural framework is smoothly filled, the weight is light, and the weight of the integral wall body is effectively reduced compared with that of an integrally cast wall body.
The beam stirrups 8 in the superposed beam are convexly arranged on the upper pouring surface of the superposed beam, and the protruded height is lower than the upper surface of the prefabricated floor slab assembled on the superposed beam and used for cast-in-place combination; the beam bottom ribs 9 in the superposed beam extend out of two ends of the superposed beam, and the extending parts are L-shaped and are used for anchoring into cast-in-situ connecting sections between the superposed beam and other prefabricated walls. The transversely distributed ribs 10 of the shear wall extend out of one side of the shear wall and the extension is U-shaped to provide effective bonding capability.
For convenience of construction, the superposed beam is internally provided with a pre-embedded hanging nail 11 which is arranged along the vertical direction; in order to facilitate assembly, the shear wall and the light filling wall are provided with embedded nuts 12 for supporting, and the embedded nuts are arranged along the horizontal direction and are used for fixedly connecting inclined struts.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the utility model is all within the protection scope of the utility model. The protection scope of the utility model is subject to the claims.

Claims (8)

1. A combined precast concrete wall body adopting local cast-in-place connection is characterized by comprising a shear wall, a light filler wall and a superposed beam which are integrally precast, wherein the shear wall, the light filler wall and the superposed beam are cast to form a whole body and have consistent thickness; the bottom of the shear wall is matched with the bottom of the light filling wall to form a step structure, the bottom of the shear wall is provided with a retraction part and forms a cast-in-place connection area, vertical steel bars are arranged in the shear wall, one end of each vertical steel bar extends out of the bottom of the shear wall, and the other end of each vertical steel bar penetrates through a superposed beam at the top of the shear wall and extends out of the superposed beam.
2. The combined precast concrete wall adopting the local cast-in-place connection according to claim 1, wherein the light infill wall is composed of a reinforced concrete construction frame and a plurality of autoclaved lightweight aerated concrete blocks, the plurality of autoclaved lightweight aerated concrete blocks are distributed in the grids in the reinforced concrete construction frame, and the thickness of the autoclaved lightweight aerated concrete blocks is consistent with that of the shear wall.
3. The combined precast concrete wall body adopting the local cast-in-place connection according to claim 1, wherein the sum of the length of the cast-in-place connection area in the axial direction of the vertical steel bars and the design thickness of the laminated floor slab is the length of a lap joint space, and the length of the lap joint space is greater than the design length required by the lap joint of the vertical steel bars between two adjacent shear walls.
4. The combined precast concrete wall body adopting the local cast-in-place connection according to claim 3, wherein the length of the vertical steel bars of the shear wall extending out of the bottom of the shear wall is less than the length of the lap space and is 10-15 mm.
5. The combined precast concrete wall body adopting the local cast-in-place connection according to claim 3, wherein the length of the vertical steel bars of the shear wall extending out of the superposed beam is less than the length of the lap space and is 10-15 mm.
6. The combined precast concrete wall adopting the local cast-in-place connection according to claim 1, wherein the beam stirrups in the superposed beams are convexly arranged on the upper pouring surface of the superposed beams, and the height of the bulges is lower than the upper surface of the precast floor slab assembled on the superposed beams; and beam bottom ribs in the superposed beams extend out of two ends of the superposed beams, and the extending parts are L-shaped and are used for anchoring into cast-in-place connecting sections between the superposed beams and other prefabricated walls.
7. The precast concrete wall unit using the local cast-in-place connection according to claim 1, wherein the laterally distributed ribs of the shear wall extend out of one side surface of the shear wall, and the extending portion is U-shaped.
8. The combined precast concrete wall adopting the local cast-in-place connection according to claim 1, wherein embedded hanging nails are arranged in the superposed beams and are arranged along the vertical direction; the shear wall and the light filling wall are provided with embedded nuts for supporting and are arranged along the horizontal direction.
CN202120522224.4U 2021-03-12 2021-03-12 Adopt local cast-in-place combination formula precast concrete wall body of connecting Active CN215406707U (en)

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Application Number Priority Date Filing Date Title
CN202120522224.4U CN215406707U (en) 2021-03-12 2021-03-12 Adopt local cast-in-place combination formula precast concrete wall body of connecting

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Application Number Priority Date Filing Date Title
CN202120522224.4U CN215406707U (en) 2021-03-12 2021-03-12 Adopt local cast-in-place combination formula precast concrete wall body of connecting

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CN215406707U true CN215406707U (en) 2022-01-04

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