CN113006321A - Construction method for connecting joints between combined precast concrete wall bodies - Google Patents
Construction method for connecting joints between combined precast concrete wall bodies Download PDFInfo
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- CN113006321A CN113006321A CN202110269877.0A CN202110269877A CN113006321A CN 113006321 A CN113006321 A CN 113006321A CN 202110269877 A CN202110269877 A CN 202110269877A CN 113006321 A CN113006321 A CN 113006321A
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- 238000010276 construction Methods 0.000 title claims abstract description 37
- 239000011178 precast concrete Substances 0.000 title claims abstract description 19
- 239000004567 concrete Substances 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 30
- 239000010959 steel Substances 0.000 claims description 30
- 239000002131 composite material Substances 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4114—Elements with sockets
- E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/82—Removable non-load-bearing partitions; Partitions with a free upper edge characterised by the manner in which edges are connected to the building; Means therefor; Special details of easily-removable partitions as far as related to the connection with other parts of the building
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a construction method of a connection node between combined precast concrete wall bodies, which comprises the steps that two combined wall bodies and laminated slab precast bottom plates on two sides are matched, assembled and poured to form the combined precast concrete wall bodies, each combined wall body comprises an integrally precast shear wall, a light filler wall and a laminated beam precast bottom beam, and the bottom of each shear wall is provided with a recess and matched with the light filler wall to form a step structure; when in construction, the top of the superposed beam prefabricated bottom beam corresponding to the light infilled wall is poured and serves as a first support connecting part, then the upper-layer combined wall is hoisted to a position which is above and overlapped with the lower-layer combined wall, the bottom of the light infilled wall of the upper-layer combined wall is placed on the first support connecting part and is then stabilized by adopting an inclined support, and after the verticality is adjusted, second post-poured concrete is adopted for pouring; and finally, filling joints between the light filling wall and the first supporting connecting part to finish construction. The invention has reasonable construction sequence, convenient and efficient process and easy control of the connection quality of the nodes.
Description
Technical Field
The invention relates to the field of fabricated buildings, in particular to a construction method of a connection node between combined precast concrete wall layers.
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.
In order to avoid various problems caused by sleeve grouting connection, engineering technicians also propose that a node connection area between adjacent upper and lower prefabricated shear walls is in a cast-in-place connection mode. When the prefabricated shear wall is designed and manufactured, a section of cast-in-place connecting area is reserved at the bottom of the prefabricated shear wall, only vertical steel bars extend out of the cast-in-place connecting area, and concrete is not poured. However, the connection mode brings inconvenience to hoisting and temporary fixing of the prefabricated shear wall, and the prefabricated shear wall is erected in the air firstly during installation and used for binding the steel bars of the cast-in-place connection area and the concrete of the cast-in-place connection area. The common inclined support cannot complete the erection task, special transformation design needs to be carried out on the support, the construction cost is increased, the construction efficiency is influenced, even if the installation verticality of the prefabricated wall body is difficult to guarantee, and the construction quality is finally influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method of a connection node between combined precast concrete wall body layers, which has the advantages of reasonable construction sequence, convenient and efficient construction process and easy control of the connection quality of the node.
In order to solve the technical problems, the invention provides a construction method of a connection node between combined precast concrete wall layers, which is formed by matching, assembling and pouring a lower combined wall body, an upper combined wall body and laminated slab precast bottom plates at two sides, wherein the lower combined wall body and the upper combined wall body have the same structure and respectively comprise a shear wall, a light filler wall and a superposed beam precast bottom beam which are integrally precast, the shear wall and the light filler wall are arranged adjacently at the left and right, the superposed beam precast bottom beam is arranged above the shear wall and the light filler wall, the bottom of the shear wall is provided with a recess and matched with the light filler wall to form a step structure, one end of a vertical steel bar in the shear wall extends out of the bottom of the shear wall, and the other end of the vertical steel bar penetrates through the superposed beam precast bottom beam and extends out of the superposed beam;
the construction method comprises the following steps:
step 1) mounting laminated slab prefabricated bottom plates on two sides of a laminated beam prefabricated bottom beam at the top of a lower-layer combined wall body, wherein the laminated slab prefabricated bottom plates on the two sides are placed on the laminated beam prefabricated bottom beam, then dividing the upper part of the laminated beam prefabricated bottom beam of the lower-layer combined wall body into a first section and a second section, wherein the first section is positioned between the laminated beam prefabricated bottom beam and a light filling wall of an upper-layer combined wall body, and the second section is positioned between the laminated beam prefabricated bottom beam and a shear wall of the upper-layer combined wall body;
step 2) installing a first longitudinal rib at the upper part of the superposed beam in the first section, binding the first longitudinal rib at the upper part of the superposed beam with a superposed beam stirrup of a prefabricated bottom beam of the corresponding superposed beam, and installing a threaded sleeve at the end of one side, facing the second section, of the first longitudinal rib at the upper part of the superposed beam;
step 3) then arranging a baffle on the second section, wherein the top of the baffle is higher than the height position corresponding to the design thickness of the post-cast layer of the laminated slab on the prefabricated bottom beam of the laminated beam, and temporarily fixing the baffle and the stirrup of the laminated beam; wherein the threaded sleeve is abutted against the baffle;
step 4) subsequently installing an elevation adjusting plate on the superposed beam prefabricated bottom beam corresponding to the light infilled wall, and then adjusting the height of the upper surface of the elevation adjusting plate until the height is equal to the height position corresponding to the design thickness of the post-cast layer of the superposed slab on the superposed beam prefabricated bottom beam;
step 5) pouring the surface of the laminated slab prefabricated bottom plate by adopting first post-cast concrete to obtain a prefabricated floor slab, pouring the first post-cast concrete in the first section, and controlling the pouring height and the surface flatness of the first section by an elevation adjusting plate to obtain a first support connecting part;
step 6), after the first post-cast concrete is solidified and hardened, the baffle is removed;
step 7), mounting a second longitudinal rib at the upper part of the superposed beam in the second section after dismantling, connecting the second longitudinal rib at the upper part of the superposed beam with the threaded sleeve during mounting, and then binding the second longitudinal rib at the upper part of the superposed beam with a superposed beam stirrup of a prefabricated bottom beam of the corresponding superposed beam;
step 8) hoisting the upper-layer combined wall body to a position which is above and overlapped with the lower-layer combined wall body, placing the bottom of the light infill wall of the upper-layer combined wall body on the first support connecting part, then erecting an inclined support on one side surface of the combined wall body for stabilization, adjusting the installation verticality, and completing the hoisting;
step 9) binding the vertical connecting steel bars of the lower-layer combined wall body and the vertical connecting steel bars of the upper-layer combined wall body in the second section, erecting a template on the second section, and pouring by adopting second post-cast concrete;
and step 10) after the second post-cast concrete is solidified and hardened, removing the inclined support and the template, and filling the gap between the light filling wall and the surface of the first support connecting part by using a gap filler to finish construction.
Furthermore, at least two internal thread connecting pieces are pre-embedded in the superposed beam prefabricated bottom beam corresponding to the first section, a threaded rod is vertically welded in the middle of the elevation adjusting plate, and the end part of the threaded rod is arranged in the corresponding internal thread connecting piece in a rotating mode.
Furthermore, the internal thread connecting piece is arranged in the middle of the prefabricated bottom beam of the superposed beam in the thickness direction.
Furthermore, one end of the vertical steel bar of the lower combined wall body penetrates through the prefabricated bottom beam of the superposed beam and extends out of the lower portion of the bottom of the shear wall of the upper combined wall body, the distance is 10-15mm, one end of the vertical steel bar of the upper combined wall body penetrates through the bottom of the shear wall and extends out of the upper portion of the prefabricated bottom beam of the superposed beam of the lower combined wall body, and the distance is 10-15 mm.
Furthermore, the transverse distribution ribs of the shear wall extend out of the side face of the shear wall, and the extending part is U-shaped.
Furthermore, the beam bottom ribs in the prefabricated bottom beam of the superposed beam extend out of two ends of the prefabricated bottom beam of the superposed beam, and the extending part is in an L shape.
Furthermore, a pre-buried hanging nail is also arranged in the precast bottom beam of the superposed beam.
Furthermore, the thicknesses of the shear wall, the light filling wall and the prefabricated bottom beam of the composite beam are consistent.
The invention has the beneficial effects that:
1. the light infilled wall integrally manufactured with the shear wall serves as a vertical support for temporarily fixing the shear wall after being hoisted, and the combined precast concrete wall body can be erected by matching with the traditional oblique support, so that the pouring construction of local cast-in-place connection nodes of the upper and lower layers of shear walls is facilitated; after the concrete of the local cast-in-place connecting node of the shear wall is cured, the connecting and mounting quality of the light filling wall is enhanced in turn.
2. Through the reasonable arrangement of the pouring position and the pouring sequence of the post-cast layer concrete of the prefabricated composite floor slab, a base supporting surface is provided for the light filling wall, and the lap joint length of the steel bars at the local cast-in-place connecting nodes of the upper and lower shear walls is ensured.
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 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 prefabricated in factories, the engineering quality is less influenced by climate and manpower, the durability of the components is longer, and the whole quality is controlled and traceable.
Drawings
FIG. 1 is a schematic cross-sectional view of a connection node according to the present invention;
FIG. 2 is a sectional wall of the present invention;
FIG. 3 is a schematic structural view of the present invention after binding and mounting of an elevation adjustment plate in a first section;
FIG. 4 is a schematic view of the present invention with baffles set;
FIG. 5 is a schematic representation of the present invention after placement with a first post-cast concrete;
FIG. 6 is a schematic view of the construction of the present invention with the baffle removed and the lower modular wall connected to the first support;
FIG. 7 is a schematic view of the assembled upper modular wall of the present invention;
fig. 8 is a schematic connection diagram of the lower-layer combined wall and the upper-layer combined wall after the second post-cast concrete is poured.
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 and 2, in an embodiment of the construction method of the connection node between the combined precast concrete wall layers of the present invention, firstly, a self-developed combined wall structure is used as a component of the connection node, specifically, the connection node includes a lower combined wall 1, an upper combined wall 2, and composite slab prefabricated bottom plates 3 at two sides, which are assembled and poured to form a cross structure, the lower combined wall and the upper combined wall have the same structure and each include an integrally prefabricated shear wall 4, a lightweight filler wall 5, and a composite beam prefabricated bottom beam 6, the shear wall and the lightweight filler wall are adjacently arranged at the left and right sides, the composite beam prefabricated bottom beam is arranged above the shear wall and the lightweight filler wall, one end of a vertical steel bar 7 in the shear wall extends out of the bottom of the shear wall, the other end of the shear wall passes through the composite beam prefabricated bottom beam and extends out, when the composite wall and the composite beam are arranged in a stacked manner, lower floor's combination formula wall body and the adjacent vertical reinforcement of upper strata assembled wall body are connected, and the shear force wall bottom is provided with the indentation and forms the stair structure with the cooperation of light infilled wall, and the stair structure is used for effectively dodging the length of vertical reinforcing bar to satisfy the required design length of vertical reinforcing bar overlap joint, guarantee the joint strength between the adjacent reinforcing bar after concrete placement and the sclerosis. One end of a vertical steel bar of the lower combined wall body penetrates through the superposed beam prefabricated bottom beam and extends out of the lower portion of the shear wall bottom of the upper combined wall body, the distance is 10-15mm, one end of a vertical steel bar of the upper combined wall body penetrates through the shear wall bottom and extends out of the upper portion of the superposed beam prefabricated bottom beam of the lower combined wall body, and the distance is 10-15 mm.
The specific construction method comprises the following steps: before construction, a lower-layer combined wall body is assembled and fixed, laminated slab prefabricated bottom plates are installed on two sides of a laminated beam prefabricated bottom beam at the top of the lower-layer combined wall body, the laminated slab prefabricated bottom plates on the two sides are placed on the laminated beam prefabricated bottom beam, a gap is formed between the laminated slab prefabricated bottom plates on the two sides and used for pouring combination, the upper portion of the laminated beam prefabricated bottom beam of the lower-layer combined wall body is divided into a first section 8 and a second section 9 along the length direction, the first section is located between the laminated beam prefabricated bottom beam and a light filling wall of an upper-layer combined wall body, and the second section is located between the laminated beam prefabricated bottom beam and a shear wall of an upper-layer combined wall body; the upper longitudinal ribs of the prefabricated bottom beam of the superposed beam, which need to be bound, are divided into first longitudinal ribs on the upper part of the superposed beam and second longitudinal ribs on the upper part of the superposed beam, wherein the first longitudinal ribs on the upper part of the superposed beam are used for binding the first section, and the second longitudinal ribs on the upper part of the superposed beam are used for binding the second section; the partition structure can facilitate subsequent split pouring construction, does not influence subsequent baffle erection, and is convenient to operate;
referring to fig. 3 and 4, then installing a first longitudinal rib 10 at the upper part of the composite beam in the first section, binding the first longitudinal rib at the upper part of the composite beam with a stirrup of the composite beam corresponding to the prefabricated bottom beam of the composite beam, and installing a threaded sleeve 11 at the end of the first longitudinal rib at the upper part of the composite beam, which faces to the second section; the threaded sleeve is mainly used for effectively connecting a first longitudinal rib on the upper portion of the superposed beam with a second longitudinal rib on the upper portion of the superposed beam; then, erecting a baffle plate 12 on the second section, wherein the top of the baffle plate is higher than the height position corresponding to the design thickness of the post-cast layer of the laminated slab on the prefabricated bottom beam of the laminated beam, and temporarily fixing the baffle plate and the stirrup of the laminated beam; the threaded sleeve is abutted to the baffle plate, so that subsequent grouting is prevented from entering the threaded sleeve; then, installing an elevation adjusting plate 13 on the superposed beam prefabricated bottom beam corresponding to the light infilled wall, and then adjusting the height of the upper surface of the elevation adjusting plate until the height is equal to the height position corresponding to the design thickness of the superposed slab post-cast layer on the superposed beam prefabricated bottom beam; the pouring height and the flatness can be effectively controlled through the elevation adjusting plate, so that the subsequent hoisting and placing quality of the upper-layer combined wall body is facilitated;
referring to fig. 5, pouring the surface of the laminated slab prefabricated bottom plate by using first post-cast concrete to obtain a prefabricated floor slab, pouring the first section by using the first post-cast concrete, and controlling the pouring height and the surface flatness of the first section by using an elevation adjusting plate to obtain a first support connecting part 14, which is shown in fig. 6;
after the first post-cast concrete is solidified and hardened, the baffle is removed; referring to fig. 7, after the prefabricated bottom beam is removed, mounting a second longitudinal rib 15 at the upper part of the superposed beam in the second section, connecting the second longitudinal rib at the upper part of the superposed beam with a threaded sleeve during mounting, and binding the second longitudinal rib at the upper part of the superposed beam with a superposed beam stirrup of the prefabricated bottom beam of the corresponding superposed beam; hoisting the upper-layer combined wall body to a position which is above and overlapped with the lower-layer combined wall body, placing the bottom of the light infill wall of the upper-layer combined wall body on the first support connecting part, then erecting an inclined support on one side surface of the combined wall body for stabilizing, adjusting the installation verticality, and completing the hoisting; at the moment, the weight of the whole upper-layer combined wall body is borne by the first supporting connecting part, the floor is installed without erection, and the floor is safe and reliable.
Then, the vertical connecting steel bars of the lower-layer combined wall body and the vertical connecting steel bars of the upper-layer combined wall body are bound in the second section, then the second section is provided with a formwork, second post-cast concrete is adopted for pouring, effective connection of the shear wall is formed after the second post-cast concrete is condensed and hardened, as shown in the figure 8, the diagonal brace and the formwork can be detached afterwards, the hardened second post-cast concrete can be inverted to enhance the connection and installation quality of the light filling wall, the strength of the whole connecting node is greatly improved, the quality is stable and reliable, finally, the gap filling agent is used for filling the gap between the light filling wall and the surface of the first support connecting part, and the construction is completed.
At least two internal thread connecting pieces 131 are embedded in the superposed beam prefabricated bottom beam corresponding to the first section, a threaded rod 132 is vertically welded in the middle of the elevation adjusting plate, the end part of the threaded rod is used for being rotatably arranged in the corresponding internal thread connecting piece, the adjustment is convenient, and the operation difficulty is low. The internal thread connecting piece is arranged in the middle of the thickness direction of the prefabricated bottom beam of the superposed beam, so that interference between the elevation adjusting plate and the periphery is avoided in the rotating process.
The transverse distribution ribs of the shear wall extend out of the side face of the shear wall, the extending parts are in U shapes, effective combining capacity is provided, beam bottom ribs in the prefabricated bottom beam of the superposed beam extend out of two ends of the prefabricated bottom beam of the superposed beam, and the extending parts are in L shapes and are used for anchoring cast-in-place connecting sections between the shear wall and other prefabricated wall bodies, and connecting strength is improved. Still be provided with pre-buried nail of hanging in the prefabricated floorbar of composite beam, convenient hoist and mount construction, the thickness of shear force wall, light infilled wall and the prefabricated floorbar of composite beam is unanimous, and owing to the structure of preparation as an organic whole, consequently can guarantee not to have not the height uneven and not link up behind the dislocation scheduling problem, can reach the effect of exempting from to plaster.
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 invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (8)
1. A construction method for connecting nodes between combined precast concrete wall bodies is characterized in that a lower combined wall body, an upper combined wall body and laminated slab precast bottom plates on two sides are matched, assembled and poured to form the combined precast concrete wall body, the lower combined wall body and the upper combined wall body are consistent in structure and respectively comprise a shear wall, a light filler wall and a superposed beam precast bottom beam which are integrally precast, the shear wall and the light filler wall are adjacently arranged on the left and right sides, the superposed beam precast bottom beam is arranged above the shear wall and the light filler wall, the bottom of the shear wall is provided with a recess and matched with the light filler wall to form a step structure, one end of a vertical steel bar in the shear wall extends out of the bottom of the shear wall, and the other end of the vertical steel bar penetrates through the superposed beam precast bottom beam and extends out of the;
the construction method comprises the following steps:
step 1) mounting laminated slab prefabricated bottom plates on two sides of a laminated beam prefabricated bottom beam at the top of a lower-layer combined wall body, wherein the laminated slab prefabricated bottom plates on the two sides are placed on the laminated beam prefabricated bottom beam, then dividing the upper part of the laminated beam prefabricated bottom beam of the lower-layer combined wall body into a first section and a second section, wherein the first section is positioned between the laminated beam prefabricated bottom beam and a light filling wall of an upper-layer combined wall body, and the second section is positioned between the laminated beam prefabricated bottom beam and a shear wall of the upper-layer combined wall body;
step 2) installing a first longitudinal rib at the upper part of the superposed beam in the first section, binding the first longitudinal rib at the upper part of the superposed beam with a superposed beam stirrup of a prefabricated bottom beam of the corresponding superposed beam, and installing a threaded sleeve at the end of one side, facing the second section, of the first longitudinal rib at the upper part of the superposed beam;
step 3) then arranging a baffle on the second section, wherein the top of the baffle is higher than the height position corresponding to the design thickness of the post-cast layer of the laminated slab on the prefabricated bottom beam of the laminated beam, and temporarily fixing the baffle and the stirrup of the laminated beam; wherein the threaded sleeve is abutted against the baffle;
step 4) subsequently installing an elevation adjusting plate on the superposed beam prefabricated bottom beam corresponding to the light infilled wall, and then adjusting the height of the upper surface of the elevation adjusting plate until the height is equal to the height position corresponding to the design thickness of the post-cast layer of the superposed slab on the superposed beam prefabricated bottom beam;
step 5) pouring the surface of the laminated slab prefabricated bottom plate by adopting first post-cast concrete to obtain a prefabricated floor slab, pouring the first post-cast concrete in the first section, and controlling the pouring height and the surface flatness of the first section by an elevation adjusting plate to obtain a first support connecting part;
step 6), after the first post-cast concrete is solidified and hardened, the baffle is removed;
step 7), mounting a second longitudinal rib at the upper part of the superposed beam in the second section after dismantling, connecting the second longitudinal rib at the upper part of the superposed beam with the threaded sleeve during mounting, and then binding the second longitudinal rib at the upper part of the superposed beam with a superposed beam stirrup of a prefabricated bottom beam of the corresponding superposed beam;
step 8) hoisting the upper-layer combined wall body to a position which is above and overlapped with the lower-layer combined wall body, placing the bottom of the light infill wall of the upper-layer combined wall body on the first support connecting part, then erecting an inclined support on one side surface of the combined wall body for stabilization, adjusting the installation verticality, and completing the hoisting;
step 9) binding the vertical connecting steel bars of the lower-layer combined wall body and the vertical connecting steel bars of the upper-layer combined wall body in the second section, erecting a template on the second section, and pouring by adopting second post-cast concrete;
and step 10) after the second post-cast concrete is solidified and hardened, removing the inclined support and the template, and filling the gap between the light filling wall and the surface of the first support connecting part by using a gap filler to finish construction.
2. The construction method of the connection node between the combined precast concrete wall bodies according to claim 1, wherein at least two internal thread connecting pieces are embedded in the precast bottom beams of the superposed beams corresponding to the first section, a threaded rod is vertically welded in the middle of the elevation adjusting plate, and the end of the threaded rod is screwed in the corresponding internal thread connecting piece.
3. The method for constructing a connection node between modular precast concrete wall bodies according to claim 2, wherein the female screw-type coupling member is provided at a middle position in a thickness direction of the precast sill beam of the composite girder.
4. The construction method of the connection node between the combined type precast concrete wall bodies according to claim 1, wherein one end of the vertical steel bar of the lower combined type wall body passes through the precast bottom beam of the superposed beam and extends below the bottom of the shear wall of the upper combined type wall body with a spacing of 10-15mm, and one end of the vertical steel bar of the upper combined type wall body passes through the bottom of the shear wall and extends above the precast bottom beam of the superposed beam of the lower combined type wall body with a spacing of 10-15 mm.
5. The method for constructing a connection node between combined precast concrete wall bodies according to claim 1, wherein the lateral distribution ribs of the shear wall are protruded from the side surface of the shear wall, and the protruded portion is U-shaped.
6. The method for constructing a connection node between modular precast concrete wall bodies according to claim 1, wherein the bottom ribs in the precast bottom girder of the composite girder extend out of both ends of the precast bottom girder of the composite girder, and the extended portions are L-shaped.
7. The construction method of the connection node between the combined precast concrete wall bodies according to claim 1, wherein the precast bottom beam of the superposed beam is further provided with embedded hanging nails.
8. The method for constructing a connection node between combined precast concrete wall bodies according to claim 1, wherein the thicknesses of the shear wall, the lightweight infill wall and the composite beam precast bottom beam are uniform.
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| CN113006321B (en) | 2021-09-28 |
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