CN113738157B - Temporary supports on two sides of post-cast strip of building and method for constructing constructional column by using temporary supports - Google Patents
Temporary supports on two sides of post-cast strip of building and method for constructing constructional column by using temporary supports Download PDFInfo
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- CN113738157B CN113738157B CN202111159900.7A CN202111159900A CN113738157B CN 113738157 B CN113738157 B CN 113738157B CN 202111159900 A CN202111159900 A CN 202111159900A CN 113738157 B CN113738157 B CN 113738157B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/02—Shores or struts; Chocks non-telescopic
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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Abstract
The invention discloses a temporary support for two sides of a post-cast strip of a building floor and a method for constructing a constructional column by using the temporary support; the support comprises a support column, wherein the support column comprises a lower stacking part and an upper cast-in-place part; the overlapped part is formed by vertically overlapping a plurality of wide concrete cushion blocks and narrow concrete cushion blocks, and the wide concrete cushion blocks and the narrow concrete cushion blocks are arranged in a staggered way; the bottom surface of each concrete cushion block is provided with a plurality of jacks; the top surface of the top concrete cushion block is a plane, and a plurality of connecting reinforcing steel bars protruding from the top surface of the top concrete cushion block are anchored in each normal concrete cushion block; the connection steel bar of each normal concrete cushion block is correspondingly inserted into the jack on the bottom surface of the concrete cushion block on the upper layer; the top concrete cushion block is sleeved with a mould for casting and tamping the cast-in-situ part, and a cavity of the mould is communicated with a reserved hole of the side bottom template; the key point of the method is that the support column is split into a wide concrete cushion block and a narrow concrete cushion block, and then is superposed to form the constructional column again, and grouting is carried out downwards along the main guide pipe. The temporary support and the method can reduce the field pouring amount, accelerate the construction period, reduce the material consumption and have high turnover.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to temporary supports on two sides of a post-cast strip of a building floor and a method for constructing a constructional column by using the temporary supports, and more particularly relates to a floor slab in the application, which comprises a floor slab of a common floor of a building and a top plate of a basement of the building.
Background
In the construction of building engineering, in order to prevent the concrete building structure from causing cracks due to uneven self-contraction settlement, a post-cast strip needs to be reserved when a large-span floor slab is constructed according to the requirements of design and construction specifications. Specifically, the bottom templates of the left and right side floors and the floor type fastener scaffolds supporting the left and right side bottom templates are erected, and then the left side floor concrete and the right side floor concrete are cast, so that a post-cast strip is reserved between the two parts of floors; after the concrete of the left and right side floor slabs is hardened, the left and right side bottom templates and the corresponding fastener scaffolds are disassembled, at the moment, the left side floor slab and the right side floor slab both form a swing arm type structure, and in order to ensure the construction safety, temporary supports are required to be arranged below the floor slabs on the left and right sides of the post-cast strip to support the overhanging ends of the two side floor slabs; and (3) building a formwork structure of the post-cast strip until the construction enters the tail sound and the building structure is capped, and additionally casting the post-cast strip concrete to form the whole building floor slab.
In conclusion, the temporary supports on the two sides of the floor slab post-cast strip refer to the temporary support structures of the overhanging ends of the floor slab on the two sides of the post-cast strip. The temporary supports on the two sides of the traditional floor post-cast strip are steel pipe fastener type support bent frames bound on site, or a plurality of vertical support steel pipes are erected to support the transverse battens, and the overhanging ends of the floor are placed on the transverse battens. The above structures all have drawbacks. The steel pipe fastener type assembling and disassembling are time-consuming and labor-consuming, the construction speed is low, the labor cost is high, and the material consumption is large; the whole height of the vertical supporting steel pipe is not adjustable, the supporting steel pipe with one height can only support a floor slab with the corresponding height, and the floor slab cannot be reused if the height of the next supporting floor is changed, so that the turnover utilization rate is low, the universality is poor, the supporting steel pipe is difficult to remove, and the floor slab can be removed only by secondary back-jacking operation.
Of course, a patent with the application number of 2019200862586 named as a post-cast strip reinforcing structure for a roof of an underground garage discloses a new temporary supporting structure, namely, when floor slabs on two sides of a post-cast strip are poured, reserved holes are formed in the templates of the floor slabs on the two sides, column side templates are erected below the reserved holes, and then when concrete of the floor slabs on the two sides is poured and tamped, plain concrete columns are integrally poured and tamped to support overhanging ends of the floor slabs on the two sides. The above structure still has the following drawbacks. The plain concrete column can only be cast on site at every time, the cast-in-place workload is large, the construction period is long, and after the post-cast strip is cast, the plain concrete column cannot be recycled and can only be dismantled on site, so that the material waste is large, and the process of dismantling the column body and clearing the construction waste is time-consuming and labor-consuming.
The application also relates to a concept of a constructional column, when the construction of the beam column of the building and the main body framework of the floor slab is completed, secondary construction is continued, and a wall is built between the upper floor slab and the lower floor slab; in order to enhance the integrity and stability of the building, reinforced concrete constructional columns are required to be arranged in the wall body of the multi-layer brick-concrete structure, and each constructional column is respectively connected with the upper beam of the upper floor slab and the lower beam of the lower floor slab, so that a space frame which resists bending and shearing is formed to prevent the wall body from collapsing.
The construction method of the constructional column in the prior art comprises the steps of building wall surfaces on the left side and the right side of the constructional column between an upper beam and a lower beam, binding a reinforcement cage of the constructional column, enabling main reinforcements of the reinforcement cage to be in lap joint with upper connecting reinforcements below the upper beam and lower connecting reinforcements above the lower beam, building front and rear templates, enabling the wall bodies on the left side and the right side which are built to play the role of the left and right templates, and pouring and tamping concrete of the constructional column.
The constructional column construction method in the prior art also has the defects of large cast-in-place quantity, low construction speed, high labor intensity, long construction period and the like, and concrete of the constructional column needs to be waited for to be hardened.
Disclosure of Invention
The invention aims to solve the technical problem of providing temporary supports on two sides of a post-cast strip of a building floor, which can reduce the on-site casting amount, shorten the construction period, improve the recycling rate, reduce the material consumption and reduce the workload of later-stage disassembly and cleaning.
The invention provides a technical solution that temporary supports are provided at two sides of a post-cast strip of a building floor; the side floor structure comprises a central post-pouring belt and side floors on two sides, wherein a side bottom template is arranged below each side floor, a support column is arranged below the overhanging end of each side floor, and a reserved hole is formed in the side bottom template at a position corresponding to the support column; each supporting column comprises a lower overlapping part and an upper cast-in-place part; the superposition part is formed by vertically superposing a plurality of prefabricated wide concrete cushion blocks and narrow concrete cushion blocks, and the wide concrete cushion blocks and the narrow concrete cushion blocks are arranged in a staggered manner; the bottom surface of each concrete cushion block is provided with a plurality of jacks; the concrete cushion block at the uppermost layer of the superposed part is a top concrete cushion block, and other concrete cushion blocks of the superposed part are normal concrete cushion blocks; the top surface of the top concrete cushion block is a plane, and a plurality of connecting reinforcing steel bars protruding above the top surface of the concrete cushion block are anchored in each normal concrete cushion block; the connection steel bar of each normal concrete cushion block is correspondingly inserted into the jack on the bottom surface of the concrete cushion block on the upper layer; the top concrete cushion block is sleeved with a mould for casting and tamping the cast-in-situ part, and a cavity of the mould is communicated with a preformed hole of the side bottom template.
Compared with the prior art, the temporary supports on two sides of the post-cast strip of the building floor with the structure have the following advantages.
Firstly, the main part, namely the middle part and the lower part of the support column are built by stacking concrete cushion blocks, and only the top part is integrally cast with a side floor slab, so that the cast-in-place quantity is greatly reduced, and the construction period of the support column is obviously shortened; the cast-in-place part is also integrally cast with the side floor slab, which belongs to the forward operation, and no additional operation step is added, so the operation is very convenient; moreover, after the post-cast strip is subjected to post-cast in the later period, only the cast-in-place part at the upper part needs to be knocked off without knocking off the whole column body, so that the labor intensity of disassembly is obviously reduced, the workload of cleaning and transporting garbage is reduced, and the labor cost is greatly saved; the main body part of the support column is alternately stacked by wide concrete cushion blocks and narrow concrete cushion blocks, so that the requirement of temporary support is met, and the wide concrete cushion blocks and the narrow concrete cushion blocks can be quickly disassembled and recycled; moreover, because the wall building and construction constructional column belongs to the secondary construction on the same construction site, after each concrete cushion block of the support column is disassembled, local materials can be obtained even without carrying and moving to the next construction site, the new structural constructional column is constructed by one object, the turnover is high, the utilization rate is high, the workload of carrying and moving is further reduced, the material consumption is also obviously saved, and the construction method is economic and environment-friendly.
Preferably, a plurality of grout anchor sleeves which are in one-to-one correspondence with the connecting reinforcing steel bars are anchored in each normal concrete cushion block, the lower openings of the grout anchor sleeves are positioned on the bottom surface of the concrete cushion block to form inserting holes, and the top end of each grout anchor sleeve is welded with the corresponding connecting reinforcing steel bar; a main duct is anchored in each normal concrete cushion block and longitudinally penetrates through the concrete cushion block; the tube cavity of each slurry anchor casing is communicated with the main duct through a branch duct, and the branch duct is also anchored in the normal concrete cushion block; thus, after each concrete cushion block is vertically overlapped, a complete and continuous grouting system is constructed, so that grout flows downwards along the main guide pipe and enters each corresponding grout anchor sleeve through the branch guide pipe of each concrete cushion block; in addition, each connecting reinforcing steel bar is spliced with the grout anchor sleeve of the previous layer and is anchored in a grout mode, the grout anchor sleeve of the previous layer is welded with the connecting reinforcing steel bar of the previous layer, the connecting reinforcing steel bar of the previous layer is spliced with the grout anchor sleeve of the previous layer and is anchored in a grout mode, wherein the anchor is 8230, so that a long and continuous main reinforcing steel bar structure is constructed, a vertical row of wide concrete cushion blocks and a vertical row of narrow concrete cushion blocks which are alternately stacked form a complete constructional column of a reinforced concrete structure, and the integrity and firmness of the constructional column are guaranteed.
As another preferable mode, the mold comprises two long channel steel side templates which are bilaterally symmetrical, two long flange plates are fixed on two sides of each long channel steel side template, the two long flange plates of the left long channel steel side template are in threaded connection with the two long flange plates of the right long channel steel side template, and a long sealing strip is arranged between the two long flange plates in threaded connection; the left long channel steel side template and the right long channel steel side template are closed to form a complete rectangular die sleeve, the upper opening of the rectangular die sleeve is flush with the side bottom template, the lower opening of the rectangular die sleeve is sleeved with the top concrete cushion block, and a rectangular sealing ring is arranged between the lower opening of the rectangular die sleeve and the top concrete cushion block; therefore, the structure is convenient to assemble, and the assembly can be completed only by screwing the left and right long-groove steel side templates into a rectangular die sleeve and sleeving the long sealing strip and the rectangular sealing ring before screwing and closing; the device does not leak slurry, and can smoothly finish the integral pouring of the side floor slab and the support column cast-in-place part; more importantly, the device is convenient to disassemble, and the rectangular die sleeve can be disassembled into two halves only by loosening the bolts after the cast-in-place part is dry and hard; and the two half screwed molds can be recycled, so that the mold is economical and environment-friendly.
Preferably, the top concrete cushion block is a narrow concrete cushion block, and the lowest concrete cushion block of the superposition part is a wide concrete cushion block; the top concrete cushion block is narrow, so that the sectional area and the casting amount of the cast-in-place part of the support column can be reduced, and the construction period is further shortened; and the width of the concrete cushion block at the lowest layer of the superposed part is selected, so that the stability of the supporting column can be ensured.
The invention aims to solve another technical problem of providing a method for constructing a constructional column by utilizing temporary support, which can reduce the on-site pouring amount, accelerate the construction period, reduce the material consumption, has high turnover, has less workload of later-stage disassembly and cleaning, has two purposes, and effectively ensures the integrity and firmness of the constructional column.
Another technical solution of the present invention is to provide a method for constructing a construction column using the temporary bracing of the present application, which includes the following steps.
a. Alternately stacking wide concrete cushion blocks and narrow concrete cushion blocks from the next floor to the top, and sleeving the inserting holes on the bottom surface of each concrete cushion block on the corresponding connecting reinforcing steel bars of the next layer of concrete cushion block; until the top concrete cushion blocks are completely overlapped; sleeving a rectangular sealing ring on the top concrete cushion block, and buckling the left long channel steel side template and the right long channel steel side template to form a complete rectangular mold sleeve in a screwed connection manner; then pouring side floor concrete, and enabling the side floor concrete to flow into a rectangular die sleeve through the reserved hole to form a cast-in-place part of each supporting column;
b. after the post-cast strip is cast, loosening the bolts to remove the rectangular mold sleeves, knocking off the cast-in-situ parts of the support columns, and then downwards removing the wide concrete cushion blocks and the narrow concrete cushion blocks one by one;
c. the wide concrete cushion blocks and the narrow concrete cushion blocks are alternately stacked from the lower beam of the lower floor slab to the upper part, wherein a plurality of exposed lower connecting reinforcing steel bars are protruded on the top surface of the lower beam, the lower connecting reinforcing steel bars are inserted into the grout anchor sleeve on the bottom surface of the concrete cushion block at the lowest layer, and the connecting reinforcing steel bars of each concrete cushion block are inserted into the grout anchor sleeve on the bottom surface of the concrete cushion block at the upper layer; continuously and alternately stacking upwards until the stacking height is close to the upper beam of the upper floor slab; a plurality of exposed upper connecting steel bars are arranged on the bottom surface of the upper beam in a downward protruding mode, the connecting steel bars of the uppermost concrete cushion block are lapped and bound with the upper connecting steel bars, a rectangular sealing ring is sleeved on the concrete cushion block, a left short channel steel side template and a right short channel steel side template are in threaded connection and closed to form a complete short square template sleeve, the concrete cushion block on the uppermost layer is sleeved with the short square template sleeve, and the upper end of the short square template sleeve is flush with the bottom surface of the upper beam; a pouring hole communicated with the short square die sleeve cavity is reserved in the upper beam during pouring;
d. grouting to the pouring hole to enable the grout to flow into the main guide pipe from the pouring hole and the short square die sleeve cavity, wherein the grout in the main guide pipe can enter each corresponding grout anchor sleeve through each branch guide pipe; thus, the grout anchor fixation of the connecting reinforcing steel bars of the upper connecting reinforcing steel bars and the concrete cushion block at the uppermost layer is realized; the connection reinforcing steel bar of each concrete cushion block is fixed with the grout anchor of the grout anchor sleeve at the bottom surface of the concrete cushion block of the previous layer; and the grout anchor fixing of the grout anchor sleeve of the lower connecting steel bar and the concrete cushion block at the lowermost layer is realized.
Compared with the prior art, the construction method has the following advantages.
Firstly, all the concrete cushion blocks are overlapped and built into a main body of the support column, and only the top is of a cast-in-place structure, so that the cast-in-place quantity is obviously reduced, and the construction period of the support column is shortened; the cast-in-place part and the side floor slab are integrally cast, which belongs to the sequential operation without adding steps, so the operation is very convenient; moreover, after the post-cast strip is subjected to post-casting in the later period, only the upper cast-in-place part is required to be knocked off, and the whole column body is not required to be knocked off, so that the labor intensity for disassembling is low, the workload for cleaning and transporting garbage is less, and the labor cost is greatly saved; the main body part of the support column is formed by alternately stacking wide concrete cushion blocks and narrow concrete cushion blocks, so that the requirement of temporary support is met, the support column can be quickly disassembled and recycled to build a constructional column, and the vertical concrete cushion blocks are alternately wide and narrow, just fit with the concave-convex shapes on two sides of the constructional column and just fit with each building block to enter a wall; moreover, as the wall building and construction constructional columns belong to secondary construction on the same construction site, after each concrete cushion block is disassembled from the support column, the materials can be obtained nearby on the spot even without carrying and moving to the next construction site, a new structure, namely the constructional column, is built by one object and two purposes, the turnover and the utilization rate are high, the workload of carrying and moving is further reduced, the material consumption is obviously saved, and the construction column is economical and environment-friendly; furthermore, the main guide pipe, the branch guide pipes and the grout anchor sleeves in each concrete cushion block are comprehensively distributed, and the grout anchor sleeves and the corresponding connection reinforcing steel bars are welded, so that a complete and continuous grouting system is constructed after each concrete cushion block is vertically superposed, and grout is ensured to flow downwards along the main guide pipe and enter each corresponding grout anchor sleeve through the branch guide pipes of each concrete cushion block; the grout can be fully and quickly spread after primary grouting; thus, each connecting reinforcing steel bar is spliced with the grout anchor sleeve on the upper layer and used for grouting anchor, the grout anchor sleeve on the upper layer is welded with the connecting reinforcing steel bar on the upper layer, and the connecting reinforcing steel bar on the upper layer is spliced with the grout anchor sleeve on the upper layer and used for grouting anchor \8230 \ 8230 \ so that a through long and continuous longitudinal main reinforcement structure is constructed, a vertical row of wide concrete cushion blocks and narrow concrete cushion blocks which are alternately superposed form a complete constructional column of a reinforced concrete structure, and the integrity and firmness of the constructional column are ensured; moreover, only one grouting is needed to complete the grout anchor sleeve of the concrete cushion block at the lowest layer and the grout anchor of the connecting reinforcing steel bar under the lower beam, and similarly, only one grouting is needed to complete the connection reinforcing steel bar of the concrete cushion block at the uppermost layer and the lap joint grout anchor of the connecting reinforcing steel bar on the upper beam by matching with the short square mold sleeve; in other words, the construction column is grouted once to form a reinforced concrete integral structure, and the upper and lower ends of the construction column are firmly connected with the upper beam of the upper floor slab and the lower beam of the lower floor slab respectively, so that the integral space frame with bending resistance and shearing resistance is formed.
Drawings
Fig. 1 is a schematic structural view of temporary supports on both sides of a building floor post-cast strip according to the present invention.
Fig. 2 is a schematic view of the structure of fig. 1 after being deflected by a certain angle.
Fig. 3 is an exploded view of the upper three concrete blocks of the temporarily supported stacks on both sides of the post-cast strip of the building floor according to the present invention.
Fig. 4 is a schematic view of the structure of fig. 3 after being deflected by a certain angle.
Fig. 5 is a schematic view showing the internal construction of the normal concrete blocks for temporary support of both sides of the post-cast strip of the building floor according to the present invention.
Fig. 6 is a schematic structural view of the assembly of the overlapping part of the temporary supports on both sides of the post-cast strip of the building floor slab and the rectangular die sleeve.
Fig. 7 is a schematic structural view of the temporarily supported cast-in-place part and the side floor before casting on both sides of the post-cast strip of the building floor according to the present invention.
FIG. 8 is a schematic structural view of the building floor post-cast strip of the present invention with the side bottom forms and the rectangular form sleeves removed from the temporary supports on both sides.
Fig. 9 is a schematic structural view of a construction column constructed using the temporary support of the present invention.
Fig. 10 is a partially exploded schematic view of a construction column of the present invention.
Fig. 11 is a cross-sectional view of a constructional column according to the invention, taken along the plane of the two rows of connecting rebars.
The structure comprises a post-cast strip 1, a side floor 2, a side bottom formwork 3, a side bottom formwork 4, a stacking part 5, a cast-in-place part 6, a wide concrete cushion block 7, a narrow concrete cushion block 8, a connecting reinforcing steel bar 9, a reserved hole 10, a grout anchor sleeve 11, a main guide pipe 12, a branch guide pipe 13, a long-slot steel side formwork 14, a long flange plate 15, a long sealing strip 16, a rectangular sealing ring 17, a lower beam 18, a lower connecting reinforcing steel bar 19, an upper beam 20, an upper connecting reinforcing steel bar 21, a short-slot steel side formwork 22, a pouring hole 23, an L-shaped reinforcing steel bar 24, a short flange plate 25 and a short sealing strip.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
In the construction process of a building structure, two side bottom templates 3 of a left floor and a right floor and corresponding floor type fastener scaffolds are erected, and then left floor concrete and right floor concrete are poured to reserve a post-pouring zone between the two parts of floors. Then two avris die block boards 3 and the formwork scaffold that corresponds about tearing open, then after the very long cycle of interval, when engineering end is to the building structure capping, just can the post-cast strip 1 concrete, so, the support column needs to be set up in the end below of encorbelmenting of left side floor and right side floor in the interval period in the middle to play the effect of interim support, one of the main content of this application promptly.
As shown in fig. 1 to 8, the temporary support for both sides of the post-cast strip of the building floor of the present invention includes a central post-cast strip 1 and side floor slabs 2 at both sides, i.e., a left side floor slab, a right side floor slab and a central post-cast strip 1.
Every avris floor 2 below all is equipped with avris die block board 3, and every avris floor 2 encorbelments the end below and all is equipped with many support columns, and avris die block board 3 all is equipped with a preformed hole 9 with the position that every support column corresponds.
Each support column comprises a lower, overlying portion 4 and an upper, in-situ portion 5. The overlapping part 4 is formed by vertically overlapping a plurality of prefabricated wide concrete cushion blocks 6 and narrow concrete cushion blocks 7, and the wide concrete cushion blocks 6 and the narrow concrete cushion blocks 7 are arranged in a staggered mode. The bottom surface of each concrete cushion block is provided with a plurality of jacks; namely, the bottom surfaces of each wide concrete cushion block 6 and each narrow concrete cushion block 7 are provided with jacks.
The concrete cushion block at the uppermost layer of the superposed part 4 is a top concrete cushion block, and other concrete cushion blocks of the superposed part 4 except the top concrete cushion block are normal concrete cushion blocks; the top surface of the top concrete cushion block is a plane, and a plurality of connecting reinforcing steel bars 8 protruding from the top surface of the top concrete cushion block are anchored in each normal concrete cushion block. The connecting steel bar 8 of each normal concrete cushion block is correspondingly inserted into the jack on the bottom surface of the concrete cushion block on the upper layer; specifically, the connecting reinforcing steel bars 8 of each normal concrete cushion block correspond to the jacks at the bottom surface of the concrete cushion block of the previous layer one by one, and each connecting reinforcing steel bar 8 of each normal concrete cushion block is inserted into the corresponding jack at the bottom surface of the concrete cushion block of the previous layer.
A plurality of grout anchor sleeves 10 which are in one-to-one correspondence with the connecting reinforcing steel bars 8 are anchored in each normal concrete cushion block, the lower openings of the grout anchor sleeves 10 are positioned at the bottom surface of the concrete cushion block to form inserting holes at the bottom surface of the concrete cushion block, and the top end of each grout anchor sleeve 10 is welded with the corresponding connecting reinforcing steel bar 8. A main duct 11 is anchored in the center of each normal concrete cushion block, and the main duct 11 longitudinally penetrates through the concrete cushion block. The lumen of each grout anchor sleeve 10 is communicated with the main conduit 11 through a branch conduit 12, and the branch conduit 12 is also anchored in the normal concrete cushion block.
The top concrete cushion block is sleeved with a mould for casting and tamping the cast-in-situ part 5, and a cavity of the mould is communicated with a preformed hole 9 of the side bottom template 3. The die comprises two long channel steel side die plates 13 which are bilaterally symmetrical, two long flange plates 14 are fixed on two sides of each long channel steel side die plate 13, the two long flange plates 14 of the left long channel steel side die plate 13 are in threaded connection with the two long flange plates 14 of the right long channel steel side die plate 13, and a long sealing strip 15 is arranged between the two long flange plates 14 which are in threaded connection; the left and right long groove steel side templates 13 are closed to form a complete rectangular die sleeve, the upper opening of the rectangular die sleeve is flush with the bottom surface of the side bottom template 3, the lower opening of the rectangular die sleeve is sleeved with a top concrete cushion block, and a rectangular sealing ring 16 is arranged between the lower opening of the rectangular die sleeve and the top concrete cushion block.
The top concrete cushion block is a narrow concrete cushion block 7, and the lowest concrete cushion block of the superposition part 4 is a wide concrete cushion block 6.
In this application, the end of encorbelmenting at two avris floor 2 has all pre-buried L shape reinforcing bar 23, and its effect lies in: when the post-cast strip 1 is re-cast at the later stage, a post-cast strip bottom template needs to be erected, the outer ends of the transverse ribs of the L-shaped reinforcing steel bars 23 are embedded in the concrete of the side floor slab 2, the main ribs of the floor slab are bound with the transverse ribs of the L-shaped reinforcing steel bars 23, the vertical ribs of the L-shaped reinforcing steel bars 23 extend downwards out of the post-cast strip 1, the lower parts of the vertical ribs are in threaded connection with pressure-bearing nuts, and the post-cast strip bottom template is supported and placed on the pressure-bearing nuts.
As shown in fig. 9 to 11, the method for temporarily supporting a construction post according to the present invention includes the following steps.
a. Alternately stacking wide concrete cushion blocks 6 and narrow concrete cushion blocks 7 from the next floor to the top, directly placing the lowest concrete cushion block on the floor, and sleeving the plug-in holes at the bottom surface of each other concrete cushion block except the lowest concrete cushion block on the corresponding connecting reinforcing steel bars 8 of the next floor; until the top concrete cushion blocks are completely overlapped; then a rectangular sealing ring 16 is sleeved on the top concrete cushion block, and the left and right long-groove steel side templates 13 are buckled to be in threaded connection and sealed into a complete rectangular mold sleeve; then, concrete is poured into the side floor slabs 2, and a part of concrete slurry flows into the rectangular die sleeves through the reserved holes 9 to form cast-in-place parts 5 of the support columns. At this time, the temporary support pouring on the two sides of the building floor post-cast strip is finished.
b. After the post-cast strip 1 is cast, temporary support service is not needed any more, so the bolts are loosened, the rectangular die sleeves are removed, the cast-in-situ parts 5 of all the support columns are knocked off, and then all the wide concrete cushion blocks 6 and the narrow concrete cushion blocks 7 are removed downwards one by one.
c. Completing construction of a main frame of a building, and performing secondary construction; the wide concrete cushion blocks 6 and the narrow concrete cushion blocks 7 are alternately stacked from the lower beam 17 of the lower floor slab upwards, wherein a plurality of exposed lower connecting reinforcing steel bars 18 are protruded on the top surface of the lower beam 17, the lower connecting reinforcing steel bars 18 are inserted into the grout anchor sleeve 10 on the bottom surface of the concrete cushion block at the lowest layer, and the connecting reinforcing steel bars 8 of each concrete cushion block are inserted into the grout anchor sleeve 10 on the bottom surface of the concrete cushion block at the upper layer; continuing to stack alternately upwards until the stacking height approaches the upper beam 19 of the upper floor; a plurality of exposed upper connecting steel bars 20 are protruded from the bottom surface of the upper beam 19, the connecting steel bar 8 of the uppermost concrete cushion block is lapped and bound with the upper connecting steel bar 20, a rectangular sealing ring 16 is sleeved on the concrete cushion block, the left and right short channel steel side templates 21 are screwed and closed to form a complete short square die sleeve, namely, the short flange plates 24 on the two sides of the left short channel steel side template 21 are screwed with the short flange plates 24 on the two sides of the right short channel steel side template 21, and a short sealing strip 25 is clamped between the two short flange plates 24 which are screwed with each other, so that the complete and sealed short square die sleeve is formed, the uppermost concrete cushion block is sleeved by the short square die sleeve, and the upper end of the short square die sleeve is level with the bottom surface of the upper beam 19; and the upper beam 19 is reserved with a pouring hole 22 communicated with the short square die sleeve cavity during pouring.
d. Grouting downwards from the pouring hole 22 of the upper beam 19 to enable grout to flow into the main conduit 11 from the pouring hole 22 and the short square die sleeve cavity, and enabling the grout in the main conduit 11 to enter the corresponding grout anchor sleeves 10 through the branch conduits 12; thus, the slurry anchor fixation of the connecting steel bar 20 on the upper beam 19 and the connecting steel bar 8 of the concrete cushion block at the uppermost layer is realized; the grout anchor fixation of the connecting reinforcing steel bar 8 of each concrete cushion block and the grout anchor sleeve 10 at the bottom surface of the concrete cushion block of the previous layer is realized; and the grout anchor fixation of the lower connecting reinforcing steel bar 18 of the lower beam 17 and the grout anchor sleeve 10 of the concrete cushion block at the lowermost layer is realized. In this way, the construction of the construction columns is completed, and the construction columns are firmly connected with the upper and lower girders 19 and 17, thereby forming an integrated space frame resistant to bending and shearing. And continuously building each building block to form an integral wall surface.
Claims (5)
1. The temporary supports for two sides of the building floor post-cast strip comprise a central post-cast strip (1) and side floors (2) on two sides, wherein a side bottom template (3) is arranged below each side floor (2), a support column is arranged below the overhanging end of each side floor (2), and a preformed hole (9) is formed in the side bottom template (3) at a position corresponding to the support column; the method is characterized in that: each supporting column comprises a lower superposition part (4) and an upper cast-in-place part (5); the superposition part (4) is formed by vertically superposing a plurality of prefabricated wide concrete cushion blocks (6) and narrow concrete cushion blocks (7), and the wide concrete cushion blocks (6) and the narrow concrete cushion blocks (7) are arranged in a staggered way; the bottom surface of each concrete cushion block is provided with a plurality of jacks; the concrete cushion block on the uppermost layer of the superposition part (4) is a top concrete cushion block, and other concrete cushion blocks of the superposition part (4) are normal concrete cushion blocks; the top surface of the top concrete cushion block is a plane, and a plurality of connecting reinforcing steel bars (8) protruding from the top surface of the top concrete cushion block are anchored in each normal concrete cushion block; the connecting steel bar (8) of each normal concrete cushion block is correspondingly inserted into the jack on the bottom surface of the concrete cushion block on the upper layer; the top concrete cushion block is sleeved with a mould for casting and tamping the cast-in-situ part (5), and a cavity of the mould is communicated with a preformed hole (9) of the side bottom template (3).
2. The temporary support for both sides of the post-cast strip of building floor according to claim 1, wherein: a plurality of grout anchor sleeves (10) which are in one-to-one correspondence with the connecting reinforcing steel bars (8) are anchored in each normal concrete cushion block, the lower openings of the grout anchor sleeves (10) are positioned on the bottom surface of the concrete cushion block to form inserting holes, and the top end of each grout anchor sleeve (10) is welded with the corresponding connecting reinforcing steel bar (8); a main duct (11) is anchored in each normal concrete cushion block, and the main duct (11) longitudinally penetrates through the concrete cushion block; the lumen of each grout anchor sleeve (10) is communicated with the main duct (11) through a branch duct (12), and the branch duct (12) is also anchored in the normal concrete cushion block.
3. The temporary support for both sides of a building floor post-cast strip of claim 1, wherein: the die comprises two long channel steel side die plates (13) which are bilaterally symmetrical, two long flange plates (14) are fixed on two sides of each long channel steel side die plate (13), the two long flange plates (14) of the left long channel steel side die plate (13) are in threaded connection with the two long flange plates (14) of the right long channel steel side die plate (13), and a long sealing strip (15) is arranged between the two long flange plates (14) in threaded connection; the left long steel groove side template (13) and the right long steel groove side template (13) are closed to form a complete rectangular die sleeve, the upper opening of the rectangular die sleeve is flush with the side bottom template (3), the lower opening of the rectangular die sleeve is sleeved with the top concrete cushion block, and a rectangular sealing ring (16) is arranged between the lower opening of the rectangular die sleeve and the top concrete cushion block.
4. The temporary support for both sides of a building floor post-cast strip of claim 3, wherein: the top concrete cushion block is a narrow concrete cushion block (7), and the concrete cushion block at the lowest layer of the superposition part (4) is a wide concrete cushion block (6).
5. A method for constructing a construction column by using the temporary support as claimed in any one of claims 1 to 4, wherein: the method comprises the following steps:
a. alternately stacking wide concrete cushion blocks (6) and narrow concrete cushion blocks (7) from the next floor to the top, and sleeving the inserting holes in the bottom surface of each concrete cushion block on the corresponding connecting reinforcing steel bars (8) of the next concrete cushion block; until the top concrete cushion blocks are completely overlapped; then a rectangular sealing ring (16) is sleeved on the top concrete cushion block, and the left long channel steel side template and the right long channel steel side template (13) are buckled to be screwed and sealed into a complete rectangular mold sleeve; then pouring concrete of the side floor (2), and enabling the concrete to flow into the rectangular die sleeve through the preformed hole (9) to form a cast-in-place part (5) of each supporting column;
b. after the post-cast strip (1) is cast, loosening bolts to remove the rectangular mold sleeves, knocking off the cast-in-situ parts (5) of the support columns, and then downwards removing the wide concrete cushion blocks (6) and the narrow concrete cushion blocks (7) one by one;
c. wide concrete cushion blocks (6) and narrow concrete cushion blocks (7) are alternately stacked from a lower beam (17) of a lower floor slab upwards, wherein a plurality of exposed lower connecting reinforcing steel bars (18) are protruded on the top surface of the lower beam (17), the lower connecting reinforcing steel bars (18) are inserted into grout anchor sleeves (10) at the bottom surface of the lowermost concrete cushion block, and the connecting reinforcing steel bars (8) of each concrete cushion block are inserted into grout anchor sleeves (10) at the bottom surface of the upper concrete cushion block; continuing to stack alternately upwards until the stacking height approaches an upper beam (19) of an upper floor slab; a plurality of exposed upper connecting steel bars (20) are arranged on the bottom surface of the upper beam (19) in a downward protruding mode, the connecting steel bar (8) of the uppermost concrete cushion block is overlapped and bound with the upper connecting steel bar (20), a rectangular sealing ring (16) is sleeved on the concrete cushion block, a left short channel steel side template and a right short channel steel side template (21) are screwed and closed to form a complete short square template sleeve, the concrete cushion block on the uppermost layer is sleeved by the short square template sleeve, and the upper end of the short square template sleeve is flush with the bottom surface of the upper beam (19); a pouring hole (22) communicated with the short square die sleeve cavity is reserved in the upper beam (19) during pouring;
d. grouting the pouring hole (22) to enable the grout to flow into the main guide pipe (11) from the pouring hole (22) and the short square die sleeve mold cavity, wherein the grout in the main guide pipe (11) can enter each corresponding grout anchor sleeve (10) through each branch guide pipe (12); thus, the grout anchor fixation of the upper connecting steel bar (20) and the connecting steel bar (8) of the concrete cushion block at the uppermost layer is realized; the connection steel bar (8) of each concrete cushion block is fixed with the grout anchor sleeve (10) at the bottom surface of the upper concrete cushion block layer by grout anchor; and the grout anchor fixation of the grout anchor sleeve (10) of the lower connecting steel bar (18) and the concrete cushion block at the lowest layer is realized.
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| CN108755984A (en) * | 2018-04-16 | 2018-11-06 | 五冶集团上海有限公司 | Late poured band support construction method based on concrete square column |
| CN108756227A (en) * | 2018-06-05 | 2018-11-06 | 温州市中强建设工程有限公司 | The structure on two sides and its construction method of a kind of concrete column support top post-cast strip |
| CN209760787U (en) * | 2019-02-13 | 2019-12-10 | 中建八局第一建设有限公司 | post-cast strip supporting structure capable of being used in turnover mode |
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