CN108005387B - Synchronous construction method for cast-in-place main body of assembled wallboard and short-limb shear wall - Google Patents
Synchronous construction method for cast-in-place main body of assembled wallboard and short-limb shear wall Download PDFInfo
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- CN108005387B CN108005387B CN201711260059.4A CN201711260059A CN108005387B CN 108005387 B CN108005387 B CN 108005387B CN 201711260059 A CN201711260059 A CN 201711260059A CN 108005387 B CN108005387 B CN 108005387B
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Abstract
The invention discloses a synchronous construction method for a cast-in-place main body of an assembled wallboard and a short-limb shear wall. The invention comprises the following steps: binding steel bars of a main body structure; secondly, hoisting the assembled wallboard in place, and connecting, supporting and fixing the assembled wallboard; thirdly, erecting a cast-in-place template, and supporting and fixing the building template; and (IV) pouring concrete into the mold, and pouring the assembled wallboard and the main structure at one time for molding. The short-limb shear wall structure and the secondary structure are synchronously constructed and formed in one step, so that common quality problems such as hollowing, cracking and the like in the traditional secondary structure construction are avoided, the structural integrity is greatly enhanced, and the construction quality and effect are improved; the field construction processes and the types of materials are obviously reduced, the construction environment is greatly improved, and the factors polluting the environment are greatly reduced; meanwhile, the method has the advantages of environmental protection, energy conservation, high quality, high efficiency, safe construction and the like of the assembly type construction.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a synchronous construction method for an assembled wallboard and a short-limb shear wall cast-in-place main body.
Background
Before the eighties, a building house is basically a brick-concrete structure with less than seven layers, the building house is constructed by adopting brick walls, constructional columns, ring beams and floor slabs through synchronous construction layer by layer, and the strength of bricks is more than 10 MPa; in the nineties, due to the requirement of earthquake-resistant design, the frame structure design is mainly used, the structural beams, the columns and the floor slabs are firstly constructed, and then the enclosure walls and the partition walls are filled for the second time, so that the main building cannot collapse when the earthquake brick walls are damaged; after two 000 years, secondary construction of high-rise shear wall slabs, frame shear walls and short-limb shear wall structures, enclosure walls and inner partition walls has been adopted in large quantity, and the secondary structures of the frame shear walls and the short-limb shear walls adopt a construction method of frame secondary filling at present.
The requirements of the current design and construction specifications are as follows: when the strength of the main structure concrete meets the design strength requirement, the secondary structure, the partition wall and the like can be filled in constructional columns, belts, door and window holding frames, filling walls and the like for secondary construction of the frame structure; the method mainly prevents the risk that a stress fulcrum is formed by the constructional column during synchronous construction, and the stress position and the position of a frame are changed, so that the reinforcement part during stress calculation of the girder is inconsistent with the actual stress position on site, and the girder is cracked or even broken due to local reinforcement; meanwhile, the wall body damage caused by insufficient strength of the lower layer wall body due to direct downward transmission of floor load along the wall body after the wall body is stressed in advance is prevented, the crossbeam is stressed in advance, and uncertain influence on the structure is generated by deformation of concrete and reinforcing steel bars (in the construction of the cantilever beam with a multi-layer mixed structure, the upper layer wall body is synchronously constructed, the stress of the cantilever beam is basically not influenced after a bottom support is removed, and the stress of the cantilever beam does not need to be considered).
In construction practice for many years, the process is relatively complex, labor and time are wasted, labor and material costs are increased greatly when frames, shear walls and the like are constructed for the second time, and construction cost can be saved greatly if one-time synchronous construction can be adopted; the structure safety is a mandatory control condition of all standard standards and cannot be changed or adjusted randomly; however, if the above adverse influence factors can be solved, synchronous construction should be feasible; especially in the short-limb shear wall structure with more uniform structural stress, the number of frame beams is small, the span of the beams is not large, and after the adverse effects are well treated, synchronous construction can be completely realized.
On the basis, a synchronous construction method for the cast-in-place main body of the fabricated wallboard and the short-limb shear wall is provided, so that the overall construction quality is improved, and conditions are created for environment-friendly and energy-saving construction.
Disclosure of Invention
The invention aims to provide a synchronous construction method for a fabricated wallboard and a short-limb shear wall cast-in-place main body, which aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a synchronous construction method for an assembled wallboard and a short-limb shear wall cast-in-place main body comprises the following steps: binding steel bars of a main body structure; secondly, hoisting the assembled wallboard in place, and connecting, supporting and fixing the assembled wallboard; thirdly, erecting a cast-in-place template, and supporting and fixing the building template; and (IV) pouring concrete into the mold, and pouring the assembled wallboard and the main structure at one time for molding.
Preferably, the step (two) comprises the following substeps: (1) fixing longitudinal steel bars on the upper and lower parts of a constructional column and a door and window frame by using expansion bolts, starting to hoist a first assembled wallboard after binding of stirrups is finished, wherein the first wallboard starts from the end of a main body wall; (2) a plurality of clamping grooves are reserved at the bottom of the assembled wallboard, positioning clamps opposite to the clamping grooves are arranged on a base layer of the bottom of the wallboard, and the clamping grooves and the corresponding positioning clamps are aligned and positioned when the assembled wallboard falls down in a hoisting mode; (3) pre-embedding embedded parts or pre-embedding steel bar flail bars on the side faces of the assembled wall boards, and when the side boards of the structural wall column are installed, welding or lapping the embedded parts or the steel bar flail bars and main body steel bars, and fixing the wall body; (4) then hoisting a second assembled wallboard, aligning a positioning clamp of a lower base layer to be in place, controlling the plate seam of the assembled wallboard to be 5-8 mm, prefabricating a reserved hole on the edge of the upper plate of the assembled wallboard, inserting the upper part of the adjacent two plates into the prefabricated reserved hole by using a U-shaped clamp, and ensuring that the upper ends of the adjacent two plates are fixed to be flush; meanwhile, a temporary support frame is additionally arranged on the side face of the assembled wallboard to prevent the vertical plate from overturning towards the opposite side; (5) the hoisting, the installation and the supporting and fixing of the assembled wallboard are sequentially completed according to the method; (6) after the assembly type wallboard of one wall is installed, the constructional column and the frame-holding template are installed, and all the templates of the cast-in-place concrete part of the supporting template are uniformly pressed into the adjacent prefabricated wall body by about 100mm, so that the leveling requirement and the integrity effect of the wall surface are ensured, and the stability of wall surface support is facilitated; after the adjacent cast-in-place formworks are installed, the surface of the assembled wallboard is adjusted and reinforced once, the integral vertical leveling requirement of the wall surface is ensured, and the wallboard support is stably reinforced once; (7) after one bay or one layer of wall surface is installed, the whole wall is checked, corrected, repaired or welded in time, and the roof connection is fastened once.
Preferably, the step (III) comprises the following steps of installing the top beam steel bars of the wall board after the assembly type wall board is installed, installing the side die connected with the beam on the top of the plate, enabling the beam side die to penetrate through steel bar heads in hoisting to serve as primary support of the side die, and fixing the beam side die by using wall penetrating bolts.
Preferably, the step (four) comprises the following steps of pouring concrete after the installation engineering of the one-layer or one-flowing-water-section assembled wallboard and the cast-in-place template is completed and accepted, properly increasing slump of pipe moistening mortar before pouring concrete, pouring the pipe moistening mortar into joints among wallboards, and pouring normal concrete.
Preferably, in the substep (2), the positioning clamp is a prefabricated iron piece or cement piece, and a hole is reserved in the middle of the positioning clamp and is fixed through a shooting nail.
Preferably, in the substep (4), the temporary support frame comprises L-shaped support frame legs, the top ends of the L-shaped support frame legs are horizontally provided with support back ridges, and the support back ridges are fixedly connected with the L-shaped support frame legs; the side surface of the support back edge is provided with a plurality of horizontal connecting holes, and the top end of the support back edge is provided with a plurality of vertical connecting holes; the supporting back edge is fixedly connected with the assembled wallboard through the horizontal connecting hole; and a connecting piece with a screw thread is arranged in the vertical connecting hole and is used for being connected and fixed with the wallboard.
Compared with the prior art, the invention has the beneficial effects that: compared with the traditional secondary construction, the synchronous construction method reduces a large number of horizontal connecting steel bars of the wall body in the secondary construction, steel bar planting processes and materials connected with the main body, and reduces secondary formwork installation, concrete pouring, maintenance and other processes in the secondary construction; the secondary supporting fixing and the adjusting acceptance time of the wall surface are reduced, the plastering process and the workload of the secondary wall surface are reduced, and the practical problem of difficult material transportation in secondary construction can be effectively solved; meanwhile, the construction preparation time and the construction process time are reduced, the construction progress can be effectively accelerated, and the working efficiency can be improved; the construction period of the project can be reasonably and effectively compressed, and the operation management cost and financing cost of enterprises are reduced; the building is integrally formed at one time, the integrity is good, the appearance effect is greatly improved, and various common quality problems of secondary construction are avoided; in addition, the use of bulk materials and the construction of wet operation are greatly reduced, the construction environmental conditions of operators are greatly improved, and the factors polluting the environment are greatly reduced; therefore, the application of the technology can bring greater economic benefit and social benefit of health and environmental protection; under the current large background of vigorously promoting assembly type construction, due to continuous improvement of mechanization, standardization and industrialization rate, the method has very positive historical and practical significance for upgrading and updating of the whole building industry.
Drawings
FIG. 1 is a schematic view of an assembled wall panel support structure according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of the temporary support frame in fig. 1.
In the figure: 1. an assembled wallboard; 2. a U-shaped card; 3. a temporary support frame; 31. a support leg; 32. supporting the back edge; 33. a vertical connecting hole; 34. a horizontal connecting hole; 4. and (6) pre-burying a reinforcing steel bar head.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
First, construction process
The construction process of the invention comprises the following steps:
binding steel bars of a main body structure;
secondly, hoisting the assembled wallboard in place, and connecting, supporting and fixing the assembled wallboard;
thirdly, erecting a cast-in-place template, and supporting and fixing the building template;
and (IV) pouring concrete into the mold, and pouring the assembled wallboard and the main structure at one time for molding.
And the traditional construction process comprises main body construction and secondary structure construction:
the main construction process mainly comprises the following steps: steel bar-form-concrete;
the secondary structure construction process mainly comprises the following steps: the construction method comprises the following steps of constructing column reinforcing steel bars, a template, masonry, door and window frames, girt reinforcing steel bars, a template, concrete pouring of reinforcing steel bar engineering, oblique building of a caulking joint after one circle, wall surface base layer finishing, net hanging and plastering, proper maintenance, particularly great labor consumption for embedding and welding of reinforcing steel bars and the like, multiple general procedures, multiple material types, complex construction and long construction period; and more construction waste is generated, the construction cost is higher, the construction quality is difficult to guarantee, and the common quality problems of the secondary construction wall are difficult to be cured.
The invention adopts synchronous construction, has simple process and mainly comprises the following steps: binding reinforcing steel bars, hoisting and supporting wallboards, installing and supporting and fixing templates, pouring concrete, molding at one time, and having good integrity and no common quality problems of secondary structure construction; the field construction materials are obviously reduced, the construction environment is greatly improved, and the factors polluting the environment are greatly reduced; the only deficiency is that when synchronous construction, steel bar engineering and wallboard installation need be accomplished in step, causes when reinforcement, and the working face reduces to some extent, needs the on-the-spot interlude operation of rational arrangement, the rational arrangement.
Second, concrete construction method
Referring to fig. 1, the method for installing the assembled wallboard of the present invention includes the following steps:
(1) fixing longitudinal steel bars on the upper and lower parts of a constructional column and a door and window frame by using expansion bolts, starting to hoist a first assembled wallboard after binding of stirrups is finished, wherein the first wallboard starts from the end of a main body wall;
if the prefabricated wall body has the swing ribs which are wider than the plate edges, the hidden column stirrups and the draw hooks at the end of the main body wall are installed after the side plates are installed in place; the other plate types can be installed before the main body template is assembled;
(2) a plurality of clamping grooves are reserved at the bottom of the assembled wallboard 1, positioning clamps opposite to the clamping grooves are arranged on a base layer of the bottom of the wallboard, and the clamping grooves and the corresponding positioning clamps are aligned and positioned when the assembled wallboard 1 is hoisted and falls down; the locator card is prefabricated ironware or cement spare, and the punchhole is reserved in the middle part of locator card, penetrates the nail through with the basis and fixes.
(3) Pre-embedding embedded parts or pre-embedding steel bar flail bars on the side faces of the assembled wallboard 1, and when the side plates of the structural wall column are installed, welding or lapping the embedded parts or the steel bar flail bars and main body steel bars, and fixing the wallboard;
(4) then hoisting a second assembled wallboard, aligning a positioning clamp of a lower base layer to be in place, controlling the plate seam of the assembled wallboard to be 5-8 mm, prefabricating a reserved hole on the upper plate edge of the assembled wallboard, inserting a U-shaped clamp 2 into the reserved hole on the upper part of two adjacent plates, and ensuring that the upper ends of the two adjacent plates are fixed to be flush; meanwhile, the side face of the assembled wallboard is additionally provided with the temporary support frame 3 to prevent the vertical board from overturning towards the opposite face, and the reinforcing steel bar head 4 is properly embedded in the floor to serve as a stress support point of the temporary support frame.
Referring to fig. 2, in the present embodiment, the temporary support frame includes L-shaped support frame legs 31, a support back ridge 32 is horizontally disposed at the top end of the L-shaped support frame legs 31, and the support back ridge 32 is fixedly connected to the L-shaped support frame legs 31; the side surface of the support back edge 32 is provided with a plurality of horizontal connecting holes 34, and the top end of the support back edge 32 is provided with a plurality of vertical connecting holes 33; the supporting back edges 32 are fixedly connected with the assembly type wall panel 1 through horizontal connecting holes 34; and a connecting piece with a screw thread is arranged in the vertical connecting hole 33 and is used for being fixedly connected with the wallboard.
The supporting back edge 32 on the temporary supporting frame can also be made of a batten or a square pipe made of the same material with the lengthened legs, and the batten or the square pipe and the opposite surface of the plate are clamped by the L-shaped screw thread clamp to play a role in fixing and supporting.
(5) The hoisting, the installation and the supporting and fixing of the assembled wallboard are sequentially completed according to the method;
during hoisting, after positions of the corresponding side plates, the seal adjusting plates and the wire box plates are confirmed one by one, hoisting can be started, and a specially-assigned person commands and arranges the sequence and the positions of the hoisting plates; finally, the size of the insufficient sealing adjusting plate is uniformly adjusted in a plate seam or the cross section of a constructional column and a frame; only when the plate gap is larger, the size of the plate gap can be properly adjusted when the structural steel bar needs to be added due to the overlarge cross section in the structural column and the frame; in general, the size of the plate seam is not adjusted as much as possible;
setting secondary fixed connection at the position of a constructional column, breaking a reinforcing steel bar at the lower part of a beam by about 200mm, pouring concrete to the upper and lower positions of the beam bottom by 200mm when synchronously pouring concrete, using a batten at the broken part, breaking a polystyrene board to serve as a beam base plate, and using the polystyrene board to arch and support other beam bottoms on a wallboard;
the line box plate needs to be marked additionally, and is specially marked on the site, so that mistakes are prevented; the position of the last sealing plate can be properly adjusted according to the principle of convenient construction; a reinforcing plate for fixing the strength requirement of the lifting hook is arranged in a toilet, and meanwhile, the reinforcing plate needs to be marked additionally and cannot be adjusted; when the top of the plate is uneven, the bottom of the plate is leveled by a crow bar and dry and hard mortar;
(6) after the assembly type wallboard of one wall is installed, the constructional column and the frame-holding template are installed, and all the templates of the cast-in-place concrete part of the supporting template are uniformly pressed into the adjacent prefabricated wall body by about 100mm, so that the leveling requirement and the integrity effect of the wall surface are ensured, and the stability of wall surface support is facilitated; after the adjacent cast-in-place formworks are installed, the surface of the assembled wallboard is adjusted and reinforced once, the integral vertical leveling requirement of the wall surface is ensured, and the wallboard support is stably reinforced once; adjusting bolts are arranged between the support legs and the square pipes for adjustment and fastening; when the vertical height difference between the lifting hole and the supporting square pipe is large, a special supporting connecting hole for preventing outward inclination can be arranged at the horizontal position of the square pipe;
(7) after one bay or one layer of wall surface is installed, the whole wall is checked, corrected, repaired or welded in time, and the plate top connection is fastened once;
(8) after the assembly type wallboard is installed, the top beam steel bars of the wallboard are installed, the side die of the connecting beam is installed on the top of the wallboard, the steel bar heads can penetrate into the side die of the beam in hoisting to serve as the primary support of the side die, and the side plate of the beam is fixed by a wall penetrating bolt;
(9) pouring concrete after the installation engineering of the assembled wall board and the cast-in-place template of one layer or one water flowing section is completed and accepted, properly increasing slump of pipe wetting mortar before pouring concrete, pouring the pipe wetting mortar into the joint of the wall board, and then pouring normal concrete.
After the wall formwork is removed, plugging holes and a plate joint base layer are timely carried out on the whole wall surface, the exposed prefabricated embedded iron parts are smeared with cement, and the reinforcement treatment is carried out by using mesh cloth and cement putty; the concrete curing is as required by the conventional conditions.
Fixing method of assembly type wallboard
The concrete fixed connection method between the assembled wallboard and the main structure and between the assembled wallboard and the main structure comprises the following steps:
1. connection of the panels to the structural wall columns: and welding or lapping the embedded part or the steel bar sling on the side surface of the plate and the main steel bar, and simultaneously pouring concrete to connect and form a whole.
2. The vertical plate at the bottom of the plate is positioned and fixed: two grooves are formed in the bottom of the plate, two convex fixing pieces are fixed on the bottom foundation structure of the plate, the plate is aligned to the convex grooves in the fixing pieces to be positioned in the falling process, and the plate is supported by a support frame after being adjusted.
3. Connection between plates: firstly binding constructional columns and door and window side holding frame reinforcing steel bars, welding wall plate side throwing ribs or pre-buried iron pieces with the constructional columns and the holding frame reinforcing steel bars, and pouring concrete to form a whole; the two plates are connected with cement slurry or joint grouting by adopting convex-concave interfaces and mesh cloth, and the upper parts of the two plates are fixed by U-shaped clamps.
4. The connection of the slab top and the cast-in-place beam slab: small round holes are reserved on two sides of the top of the plate between the plates and are connected by U-shaped steel bar clamping rings, and if the assembled wallboard is light aggregate sandwich concrete filled with light materials, the assembled wallboard can be directly hammered into two plate edges for fixation by using a U-shaped clamp.
5. And (3) supporting and fixing the plate: before the wallboard is installed, steel bar heads are embedded properly on the floor to serve as stress supports of the wallboard supports, and the method is the same as that of embedding of the template supports; meanwhile, the template supporting points are matched or utilized, and the embedding quantity is reduced as much as possible.
6. Fixing the wallboard: after the wall plate preliminarily evaluates the nuclear position according to the positioning and fixing method, one end of the lower part of a section steel or wood support is fixed on an earth anchor steel bar, a square pipe or a batten is fixed at the upper part of the support close to the wall plate, the wall plate is close to the square pipe or the batten, in order to prevent the wall plate from toppling to the opposite side, an L-shaped steel bar clamp with screw threads is installed at the outer side edge of the plate, one end of the straight screw thread penetrates into the square pipe or the batten hole through a hoisting hole for fixing, and one end of the turning hook at the other end is clamped on the surface of; when the vertical height difference between the lifting hole and the supporting square pipe is large, a special supporting connecting hole for preventing outward inclination can be arranged at the horizontal position of the square pipe.
7. In a constructional column below a frame beam, concrete is separately poured, a beam bottom pad is provided with a polyphenyl board with the thickness of 30-50 mm, and after steel bars of the constructional column are broken, the constructional column is lapped or welded, and fine concrete is filled; meanwhile, the reinforcing steel bar head is inserted into the reserved hole in the top of the plate and extends into the bottom of the beam by about 200mm, so that the integral effect of connecting the plate and the beam is ensured.
Fourth, factor and countermeasure influencing synchronous construction of secondary structure of short-limb shear wall
1. In order to prevent the change of the stress position of the girder caused by the reaction force of the constructional column, secondary fixed connection can be arranged at the position of the constructional column, the steel bar is broken at about 200mm of the lower part of the girder, the concrete is poured to the upper and lower positions of 200mm of the bottom of the girder when being synchronously poured, a throwing rib is left to be lapped with the steel bar at the lower part, the broken part is supported on the wallboard by using a polystyrene board/wood square supporting beam base plate, and other bottoms of the girders are supported on the wallboard by using polystyrene board arching; the influence of the support reaction force of the constructional column can be prevented; the stress position of the crossbeam is ensured not to be changed.
2. The design load value of the lower wall beam comprises a structure dead load and a live load during use, and the design value load is half of the load, namely when the concrete reaches half of the design strength, the beam can safely bear the whole load of the structure (including the wall body); the strength of the concrete in the 7-day age is 60% of the designed strength, and the strength of the concrete in the 14-day age is 80%; the construction period is close to one layer for one week; namely, after the girder construction of the first layer is completed for seven days, the girder can bear the load of the layer safely and also can bear the partial load of the previous layer; at the moment, the second layer structure and the wall body are constructed; the load transferred to the next layer is partially borne by the wall; therefore, the compressive strength of the wall body is required to be improved, and the safety requirement of synchronous construction can be met; the strength requirement of the conventional bearing wall material is MU 7.5-MU 10; the light outer wall material is 5KPa, and the light inner wall material is 3.5 MPa; therefore, the outer wall is estimated to be between 5' 7.5MPa, and the inner wall is estimated to be between 3.5 and 5.0 MPa.
Fifth, preparation before construction
The technical preparation and working condition requirements needed before construction comprise:
1. according to the current construction requirements and habits, before the construction of the filled wall body, the positions of the door and window frames and the constructional columns are determined according to the requirements of the filled wall body, and reinforcement and section design are carried out according to the standard requirements; and then, arranging the wallboards, numbering the positions of the wallboards by each axis number, and submitting the wallboards to factory production in advance one month after the wallboards are approved internally and confirmed by owners and designs.
2. When the door and window top and the structure are provided with holes in the deepening design, the change of the consignment should be submitted, and the method of hanging the beam plate down is adopted, so that the height marks of the door and window top and the bottom of the structural beam are ensured to be consistent as much as possible, and the integrity and the appearance effect of the wall body are ensured.
3. And (4) intersecting various safety technologies before construction, and preparing corresponding accessory materials or tools.
4. The order of reinforcement and wallboard installation, when reinforcement, in the davit scope of on-the-spot hoisting equipment, stack orderly according to the mounted position serial number order of board.
5. Installation drawings are designed for the plate type of the wallboard and the position matched and connected with the main body, the method for connecting the nodes is reliable, and the plate surface is level and consistent with the cast-in-place surface; mainly comprises a door edge plate, a window edge plate, a connecting plate with a main body structure, a reinforcing plate with a toilet, a line box plate and the like.
6. When the reinforcing steel bars are bound, the reinforcing steel bars are stacked on site, and the residual reinforcing steel bars and other sundries are cleaned up before the binding of the reinforcing steel bars on one wall or one bay is basically finished, so that necessary operation space is provided for the installation of the wallboard.
7. When the seam plate is smaller than 300mm, the width of the seam plate, the constructional column and the frame should be adjusted to increase the length of the seam plate or the constructional column and the frame; when the size of the plate is larger than 300mm and smaller than 500mm, a 300mm or 450mm adjusting plate is arranged, the insufficient or excessive size is adjusted similarly, when the plate is 500 mm-600 mm below the plate, the 450mm adjusting plate is adopted, and the redundant size is adjusted by increasing the section of the constructional column or the holding frame; the adjusting plate only has two specifications of 300mm and 450mm, and is convenient to produce and install.
8. The installation of the wall panel is carried out by firstly arranging the door and window wall panel and then arranging the common wall panel; preparing a sample plate wall and then a large-area wall body; meanwhile, when various required plate shapes are processed in a factory, the maintenance is strengthened, and the plates are marked to leave the factory according to the part numbers.
9. The actual size of the plate is 6-10 mm smaller than the designed size, and the independent door stacks are connected with the adjacent constructional columns or the holding frames into a whole;
10. the constructional column can be prefabricated and installed at the same time, and the two sides of the column base are provided with the edge-wrapping angle steel and welded with the foundation expansion bolt.
Compared with the traditional secondary construction, the synchronous construction method reduces a large number of horizontal connecting steel bars of the wall body in the secondary construction, steel bar planting processes and materials connected with the main body, and reduces secondary formwork installation, concrete pouring, maintenance and other processes in the secondary construction; the secondary supporting fixing and the adjusting acceptance time of the wall surface are reduced, the plastering process and the workload of the secondary wall surface are reduced, and the practical problem of difficult material transportation in secondary construction can be effectively solved; meanwhile, the construction preparation time and the construction process time are reduced, the construction progress can be effectively accelerated, and the working efficiency can be improved; the construction period of the project can be reasonably and effectively compressed, and the operation management cost and financing cost of enterprises are reduced; the building is integrally formed at one time, the integrity is good, the appearance effect is greatly improved, and various common quality problems of secondary construction are avoided; in addition, the use of bulk materials and the construction of wet operation are greatly reduced, the construction environmental conditions of operators are greatly improved, and the factors polluting the environment are greatly reduced; therefore, the application of the technology can bring greater economic benefit and social benefit of health and environmental protection; under the current large background of vigorously promoting assembly type construction, due to continuous improvement of mechanization, standardization and industrialization rate, the method has very positive historical and practical significance for upgrading and updating of the whole building industry.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A synchronous construction method for a cast-in-place main body of an assembled wallboard and a short-limb shear wall is characterized in that: comprises the following steps of (a) carrying out,
binding steel bars of a main body structure;
secondly, hoisting the assembled wallboard in place, and connecting, supporting and fixing the assembled wallboard;
thirdly, erecting a cast-in-place template, and supporting and fixing the building template;
pouring concrete into a mold, and pouring the assembled wallboard and the main structure for molding at one time;
the step (two) comprises the following sub-steps,
(1) fixing longitudinal steel bars on the upper and lower parts of a constructional column and a door and window frame by using expansion bolts, starting to hoist a first assembled wallboard after binding of stirrups is finished, wherein the first wallboard starts from the end of a main body wall;
(2) a plurality of clamping grooves are reserved at the bottom of the assembled wallboard, positioning clamps corresponding to the clamping grooves are arranged on a base layer of the bottom of the wallboard, and the clamping grooves and the corresponding positioning clamps are aligned and positioned when the assembled wallboard falls down in a hoisting mode;
(3) pre-embedding embedded parts or pre-embedding steel bar flail bars on the side faces of the assembled wall boards, and when the side boards of the structural wall column are installed, welding or lapping the embedded parts or the steel bar flail bars and main body steel bars, and fixing the wall body;
(4) then hoisting a second assembled wallboard, aligning a positioning clamp of a lower base layer to be in place, controlling the plate seam of the assembled wallboard to be 5-8 mm, prefabricating a reserved hole on the edge of the upper plate of the assembled wallboard, inserting the upper part of the adjacent two plates into the prefabricated reserved hole by using a U-shaped clamp, and ensuring that the upper ends of the adjacent two plates are fixed to be flush; meanwhile, a temporary support frame is additionally arranged on the side face of the assembled wallboard to prevent the vertical plate from overturning towards the opposite side;
(5) the hoisting, the installation and the supporting and fixing of the assembled wallboard are sequentially completed according to the method; setting secondary fixed connection at the position of a constructional column, breaking off a steel bar at 200mm position of the lower part of a beam, pouring concrete to the upper and lower positions of 200mm of the beam bottom when synchronously pouring concrete, leaving a throwing rib to be lapped with the steel bar at the lower part, supporting a beam base plate at the broken position by using a polystyrene board or a batten, and supporting other beam bottoms on a wallboard by using polystyrene board arching;
(6) after the assembly type wallboard of one wall is installed, the constructional column and the frame-holding template are installed, and all the templates of the cast-in-place concrete part of the supporting template are uniformly pressed into the position of 100mm of the adjacent prefabricated wall, so that the leveling requirement and the integrity effect of the wall surface are ensured, and the stability of wall surface support is facilitated; after the adjacent cast-in-place formworks are installed, the surface of the assembled wallboard is adjusted and reinforced once, the integral vertical leveling requirement of the wall surface is ensured, and the wallboard support is stably reinforced once;
(7) after one bay or one layer of wall surface is installed, the whole wall is checked, corrected, repaired or welded in time, and the plate top connection is fastened once;
after the assembly type wall panel is installed, installing top beam steel bars of the wall panel, installing side molds of connecting beams on the tops of the wall panel, penetrating steel bar heads into hoisting holes of the side molds of the beams to serve as primary supports of the side molds, and fixing the side molds of the beams by wall penetrating bolts;
and (IV) the step (IV) comprises the following steps of pouring concrete after the installation engineering of the assembled wallboards and the cast-in-place templates of one layer or one flowing water section is completed and is checked, properly increasing the slump of the pipe moistening mortar before pouring the concrete, completely pouring the pipe moistening mortar into the joints among the wallboards, and then pouring normal concrete.
2. The method for synchronously constructing the cast-in-place main body of the assembled wallboard and the short-limb shear wall as claimed in claim 1, wherein: in the substep (2), the locator card is prefabricated iron or cement spare, and the centre of locator card reserves the punchhole, fixes through penetrating the nail.
3. The method for synchronously constructing the cast-in-place main body of the assembled wallboard and the short-limb shear wall as claimed in claim 1, wherein: in the step (4), the temporary support frame comprises L-shaped support frame legs (31), a support back ridge (32) is horizontally arranged at the top end of each L-shaped support frame leg (31), and the support back ridge (32) is fixedly connected with the L-shaped support frame legs (31); the side surface of the support back edge (32) is provided with a plurality of horizontal connecting holes (34), and the top end of the support back edge (32) is provided with a plurality of vertical connecting holes (33); the supporting back edges (32) are fixedly connected with the assembled wallboard through horizontal connecting holes (34); and a connecting piece with a screw thread is arranged in the vertical connecting hole (33) and is used for being connected and fixed with the wallboard.
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