CN210659295U - Template for construction of lower constructional column of cast-in-place reinforced concrete cantilever beam - Google Patents

Abstract

The utility model relates to a template is used in constructional column construction under cast-in-place reinforced concrete cantilever beam belongs to the building field. One surface of the construction column template, which is positioned on the same plane with the vertical surface of the cantilever beam template, is provided with a drawer opening, the lower part of the drawer opening is provided with a slurry overflow hole, the drawer opening is inserted with a drawer fixing bin, and the inner sides of the tops of the other three surfaces of the construction column template are provided with three-surface annular battens; the upper and lower plates of the drawer fixing bin are provided with concrete pouring holes; the method comprises the following steps of reinforcing a constructional column template by adopting constructional column template vertical square timbers, constructional column template horizontal steel timbers, constructional column template split bolt sizing blocks and constructional column template split bolts, and reinforcing an cantilever beam template by adopting cantilever beam template horizontal square timbers and cantilever beam template vertical steel timbers; the end of the drawer fixed bin is plugged with a foam board in the drawer fixed bin, the foam board in the drawer movable bin is laid in the drawer movable bin, and the foam board in the drawer movable bin are tightly squeezed with the foam board in the drawer fixed bin.

Description

Template for construction of lower constructional column of cast-in-place reinforced concrete cantilever beam

Technical Field

The utility model relates to a building field, in particular to a construction process of a cast-in-place constructional column under a cantilever beam in a reinforced concrete structure system in the building industry.

Background

As is well known, in a cast-in-place reinforced concrete structural system, a constructional column is arranged below an cantilever beam in a conventional method and is mainly used for structural reinforcement and constrained deformation of an enclosure wall body below the cantilever beam, the cantilever beam is usually a main stressed member at a building overhanging balcony, an outer corridor and the like, a vertical stressed conductive structural member is not arranged below the beam and completely depends on overhanging stress, and therefore the main stressed steel bar of the cantilever beam is an upper steel bar of the beam. If the constructional column under the cantilever beam is synchronously constructed along with stressed components such as the cantilever beam and the like, the constructional column and the cantilever beam are cast in situ and formed together due to improper operation of a construction method, so that the constructional column becomes a vertical stress fulcrum of the cantilever beam, firstly, the constructional column is difficult to bear the vertical load transmitted by the cantilever beam due to the fact that the cross section and the reinforcing bars are small, secondly, the stress of the reinforcing bars of the cantilever beam is changed, the original upper reinforcing bar stress is changed into the lower reinforcing bar stress, the design principle is completely violated, and great structural safety hazards exist. If the constructional column concrete is poured independently, and then the structural member concrete such as the cantilever beam and the like is poured after isolation measures are taken, the construction efficiency is very low, and the cost is very high. Therefore, the traditional method is secondary structure construction, and after the construction of structural members such as the cantilever beam is finished, the lower constructional column of the cantilever beam is constructed, but the process has higher construction cost, and the quality and the safety are not easy to guarantee, so that the construction is very worried by building technicians. The method is characterized in that a foam plate is laid at the bottom of a constructional column below an overhanging beam in advance, and a method for synchronous construction with structural members such as the overhanging beam is adopted successively, the principle is that vertical compression deformation at the bottom of the constructional column is converted into isolation between the top of the constructional column and the overhanging beam, the method is unscientific and cannot be subjected to practical inspection, one is that the constructional column concrete is difficult to move downwards to realize isolation between the constructional column and the overhanging beam due to the constraint of the bond stress of reinforcing steel bars, and the constructional column does not fail unless completely damaged, and the operation results in that the bottom of the constructional column basically has no concrete, the bottom of the constructional column has little rigidity, the constructional column cannot play the due role of the constructional column at all, and the leakage is easy to cause. How to find an effective method which is convenient to operate, reduces cost, ensures quality and safety and truly exerts the working principle of a constructional column and a cantilever beam is a research target for continuous pursuit and improvement of technicians in the field of buildings.

Disclosure of Invention

In order to overcome prior art's not enough, the utility model provides a template is used in constructional column construction under cast-in-place reinforced concrete cantilever beam can effectively realize the isolation of constructional column under cantilever beam and the cantilever beam, can realize the cantilever beam again and the technological method of constructional column synchronous construction under the cantilever beam again, reduces construction cost, guarantees construction quality and safety.

The utility model provides a technical scheme that its technical problem adopted is: a template for constructing a constructional column under a cast-in-situ reinforced concrete cantilever beam is characterized in that,

a. preparing a constructional column template, arranging a drawer opening of a drawer fixing bin on the construction column template according to the principle that the vertical surfaces of the constructional column template and the cantilever beam template are positioned on the same plane, arranging a slurry overflow hole on the lower part of the drawer opening, and then additionally arranging a three-surface annular plate strip on the inner side of the tops of the other three surfaces of the constructional column template;

b. customizing a drawer fixed bin and a drawer movable bin which can be matched in a drawing manner, wherein concrete pouring holes are formed in the upper plate and the lower plate of the drawer fixed bin;

c. installing vertical constructional column steel bars and constructional column stirrups under the cantilever beams, and properly adjusting the elevation of the tops of the constructional column stirrups to ensure that the upper parts of the constructional column stirrups simultaneously play a role of positioning brackets of the drawer fixing bins;

d. installing a constructional column template and an overhanging beam template under an overhanging beam, reinforcing the constructional column template by adopting a constructional column template vertical square timber, a constructional column template transverse steel timber, a constructional column template split bolt sizing block and a constructional column template split bolt, and reinforcing the overhanging beam template by adopting an overhanging beam template transverse square timber and an overhanging beam template vertical steel timber;

e. inserting a drawer fixing bin at the position of a drawer opening at the top of a constructional column template, ensuring the horizontal positioning of the drawer fixing bin by utilizing the action of a constructional column stirrup and a bracket of the constructional column template, enabling the drawer fixing bin to be close to a constructional column vertical steel bar, and fully extruding the drawer fixing bin and the constructional column vertical steel bar by utilizing the constraint of three annular battens at the periphery of the constructional column vertical steel bar; before the drawer fixed bin is inserted, firstly, a foam board in the drawer fixed bin is plugged into the end part of the drawer fixed bin, a foam board in the drawer movable bin is laid in the drawer movable bin, then, a drawer movable bin is inserted into the drawer fixed bin, so that the foam boards in the drawer movable bin and the drawer movable bin are tightly extruded with the foam board in the drawer fixed bin, and then, the foam boards in the drawer movable bin and the drawer movable bin are pulled out, so that the foam board in the drawer fixed bin is ensured to be tightly contacted with the vertical steel bars of the constructional column;

f. the inner edge of the pulled drawer movable bin is required to be flush with the outer edge of a concrete pouring hole which is communicated with the upper plate and the lower plate of the drawer fixed bin, so that the concrete pouring hole is completely leaked, the periphery of the hole is completely blocked, and the pouring of constructional column concrete is facilitated;

g. after the work is finished, pouring cantilever beam concrete and constructional column concrete below the cantilever beam, and when the grout overflow hole on the constructional column template overflows outwards, timely pushing the drawer movable bin inwards to enable the foam board in the drawer movable bin paved by the drawer movable bin to be in close contact with the foam board blocked at the inner end part of the drawer fixed bin again, so that the drawer movable bin is completely closed, and then propping against the drawer movable bin to pull out the drawer fixed bin in the constructional column template;

h. blocking the grout overflow hole, pressing the foam board in the drawer movable bin, and pulling out the drawer movable bin to enable the foam board in the drawer movable bin to be left at the position of the concrete pouring hole, so that the isolation of the poured concrete at the position is completed;

i. and inserting the drawer fixing bin into the drawer opening of the next column template with the same structure again, and circulating for use in a circulating manner in sequence.

The distance between the position of the grout overflow hole and the bottom of the drawer fixing bin is 20-25mm so as to match the concrete continuous pouring thickness corresponding to the possible insertion delay time of the drawer fixing bin.

The materials used by the fixed bin and the movable bin of the drawer are made of polytetrafluoroethylene, and the wall thickness is 2 mm.

The drawer movable bin is in an opening state, the inner end part of the drawer movable bin is flush with the nearest edge of a concrete pouring hole of the drawer fixed bin, so that the concrete at the concrete pouring hole of the drawer fixed bin can smoothly fall, and the periphery of the hole is completely blocked.

The length of the drawer fixed bin is 140mm larger than that of the drawer movable bin, so that the installation requirement of the drawer fixed bin is met, and the bracket effect of the drawer movable bin is achieved.

After the constructional column template is removed, the periphery of the top of the constructional column is sealed by flexible materials or foaming materials or low-strength mortar in time, so that the vertical steel bars of the constructional column are prevented from rusting.

The drawer fixing bin is a cuboid, and the outer opening of the drawer fixing bin is provided with a U-shaped flanging along the height direction.

The drawer handle is arranged on the outer side of the drawer movable bin, and the length and the height of the handle meet the requirement of inserting the drawer fixing bin.

The beneficial effects of the utility model are that, through the construction process of component such as synchronous construction cantilever beam and cantilever beam lower constructional column, and the concrete when both synchronous construction effectively keeps apart the method, construction progress has been accelerated, construction quality and safety have been guaranteed, construction cost is reduced, design intent has been realized, secondary construction installation difficulty has really been solved, with high costs, unsafe, the mashed root of constructional column, the constructional column top space is big, the impression quality is poor, easy seepage scheduling problem, construction technical personnel have thoroughly been solved to the pain point at this position.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is the utility model discloses constructional column construction schematic under cantilever beam.

Fig. 2 is a schematic view of the drawer movable bin of the present invention in a state of being pulled open at the top end of the constructional column.

Fig. 3 is a schematic view of the drawer movable bin of the present invention in a closed state at the top end of the constructional column.

Fig. 4 is a schematic structural diagram of the structural column top formwork of the present invention.

Fig. 5 is a schematic structural view of the drawer fixing bin of the present invention.

Fig. 6 is a schematic structural view of the end plugging foam board in the drawer fixing bin of the present invention.

Fig. 7 is a schematic structural view of the drawer movable bin of the present invention.

Fig. 8 is a schematic structural view of the inner foam board laid in the drawer movable bin of the present invention.

Fig. 9 is a schematic structural view of the drawer fixed bin and the drawer movable bin of the present invention.

Fig. 10 is the concrete isolation schematic diagram of the top of the constructional column and the cantilever beam of the present invention.

In the drawing, 1, a constructional column template, 2, three-side annular battens, 3, constructional column vertical reinforcing steel bars, 4, a drawer opening, 5, a drawer fixed bin external pulling handle, 6, a drawer fixed bin internal foam board, 7, a drawer fixed bin, 8, a drawer movable bin internal foam board, 9, a drawer handle, 10, a drawer movable bin, 11, a concrete pouring hole, 12, a constructional column stirrup, 13, a cantilever beam, 14, a cantilever beam template, 15, a cantilever beam template transverse square timber, 16, a cantilever beam template vertical steel timber, 17, a grout overflow hole, 18, a constructional column template counter bolt, 19, a constructional column template counter bolt sizing block, 20, a constructional column template transverse steel timber, 21, a constructional column template vertical square timber and 22, constructional columns are arranged.

Detailed Description

Referring to fig. 1, fig. 4, the utility model discloses at first prepare constructional column template 1, according to constructional column template 1 with the principle that 14 facades of cantilever beam template are in the coplanar set up the reservation drawer opening 4 of polytetrafluoroethylene drawer fixed bin 7 at this face, drawer opening 4 size is wide height 160 × 25mm, and set up the excessive thick liquid hole 17 that the diameter is 5mm on 20-25mm department constructional column template 1 under drawer opening 4 position, excessive thick liquid hole 17 plays the effect of gas outlet simultaneously, then add the trilateral annular lath 2 that wide height is 25 × 25mm in the top inboard of other trilateral of constructional column template 1.

Referring to fig. 5, 6, 7, 8 and 9, the polytetrafluoroethylene drawer fixed bin 7 and the drawer movable bin 10 are customized so that the following requirements are met: the thickness of the polytetrafluoroethylene plate is 2mm, the outer edge of the polytetrafluoroethylene drawer fixing bin 7 is 320 mm long, wide and high 158 mm 24mm, the outer opening is provided with a drawer fixing bin outer pull handle 5 which is U-shaped flanged along the height direction, and the outer opening is 25mm wide and high 20mm, so that the drawer fixing bin 7 can be pulled out manually. Concrete pouring holes 11 are formed in the upper and lower parts of the drawer fixing bin 7 at the middle position 135mm away from the outer opening of the drawer fixing bin outer pull handle 5 with the flanging, and the size of each hole is 150 x 150mm and is used as a pouring hole of the constructional column 22. The polytetrafluoroethylene drawer movable bin 10 is 180 × 148 × 10-18mm in length, width and height (10 mm in height on one side of the drawer handle 9 and 18mm in height on the other two sides), and is provided with the drawer handle 9. The length of the drawer fixed bin 7 is 140mm greater than that of the drawer movable bin 10, and the drawer fixed bin fully plays a role of a bracket of the drawer movable bin, so that the part of the drawer movable bin at the outward pulling position cannot fall off.

The vertical steel bars 3 of the constructional column and the constructional column stirrups 12 under the cantilever beam are installed according to the reference of fig. 1, the elevation of the tops of the constructional column stirrups 12 is properly adjusted, so that a certain constructional column stirrup 12 on the upper portion of the constructional column stirrup 12 can play the role of a positioning bracket of the polytetrafluoroethylene drawer fixing bin 7 at the same time, and the checking is qualified.

The construction column template 1 and the cantilever beam template 14 under the cantilever beam 13 are installed according to the reference of the figure 1, the construction column template 1 is reinforced by adopting the vertical square timber 21 of the construction column template, the horizontal steel timber 20 of the construction column template, the diagonal bolt sizing block 19 of the construction column template and the diagonal bolt 18 of the construction column template, the cantilever beam template 14 is reinforced by adopting the horizontal square timber 15 of the cantilever beam template and the vertical steel timber 16 of the cantilever beam template, and the verification is qualified.

Refer to fig. 1, fig. 2, fig. 3 cantilever beam form 14 and constructional column form 1 and examine the acceptance criterion back, insert polytetrafluoroethylene drawer fixed bin 7 in the drawer opening 4 position that 1 top side form of constructional column form was reserved, utilize the bracket effect of constructional column stirrup 12 and constructional column form 1 to guarantee the horizontal location of polytetrafluoroethylene drawer fixed bin 7, make polytetrafluoroethylene drawer fixed bin 7 near constructional column vertical reinforcement 3, utilize the restraint of 3 peripheral trilateral annular laths 2 of constructional column vertical reinforcement to make polytetrafluoroethylene drawer fixed bin 7 and constructional column vertical reinforcement 3 fully crowded tightly. Before inserting the polytetrafluoroethylene drawer fixed bin 7, firstly, the inner end part of the polytetrafluoroethylene drawer fixed bin 7 is plugged with a foam plate 6 in the drawer fixed bin for plugging, the length and the width of which are 30 x 153 x 19mm (the length of a reserved part is adjusted), and then, a polytetrafluoroethylene drawer movable bin 10 is inserted into the polytetrafluoroethylene drawer fixed bin 7. Should also lay the interior cystosepiment 8 of drawer activity storehouse in drawer activity storehouse 10 in advance before inserting polytetrafluoroethylene drawer activity storehouse 10, utilize drawer handle 9 to inwards impel polytetrafluoroethylene drawer activity storehouse 10, make in polytetrafluoroethylene drawer activity storehouse 10 and polytetrafluoroethylene drawer activity storehouse cystosepiment 8 and the fixed storehouse of drawer in the polytetrafluoroethylene drawer fixed storehouse 7 cystosepiment 6 closely crowded tightly, then draw out polytetrafluoroethylene drawer activity storehouse 10 and polytetrafluoroethylene drawer activity storehouse cystosepiment 8 in the storehouse, with the drawer fixed storehouse in the assurance polytetrafluoroethylene drawer fixed storehouse 7 in cystosepiment 6 and the vertical reinforcing bar 3 in close contact with of constructional column.

The inner edge of a polytetrafluoroethylene drawer movable bin 10 pulled out by referring to fig. 1, fig. 2 and fig. 3 must be flush with the outer edge of a concrete pouring hole 11 which is penetrated by an upper plate and a lower plate of a polytetrafluoroethylene drawer fixed bin 7 so as to ensure that the concrete pouring hole 11 is completely leaked, thereby ensuring that the concrete of a constructional column at the cavity of the drawer fixed bin 7 falls smoothly, facilitating the pouring of the concrete of a constructional column 22 and ensuring the tight sealing of the periphery of the concrete pouring hole 11.

After the work is finished, the cantilever beam 13 concrete and the cantilever beam lower constructional column 22 concrete are poured, when the excessive slurry hole 17 on the constructional column template 1 is to be found, the polytetrafluoroethylene drawer movable bin 10 is timely pushed inwards, so that the foam board 8 in the drawer movable bin is in close contact with the foam board 6 in the drawer fixed bin again, the drawer movable bin 10 is completely closed, then the drawer handle 9 in the movable bin is propped, and the drawer fixed bin 7 in the constructional column template 1 is pulled out by the drawer fixed bin outer pull handle 5.

And (3) blocking the grout overflow hole 17, pressing the foam board 8 in the drawer movable bin, and pulling out the drawer movable bin 10 to allow the foam board 8 in the drawer movable bin to be left at the position of the concrete pouring hole 11, thereby completing the isolation of the poured concrete at the position.

The method comprises the steps of blocking a grout overflow hole 17 of a constructional column template 1 in time, wherein the grout overflow hole 17 is observed by a specially-assigned person, is preferably observed by a caretaker or a field manager in the process of pouring concrete in situ, and pushes a drawer movable bin 10 and blocks the grout overflow hole 17 in time when the grout overflow hole 17 overflows.

And inserting the polytetrafluoroethylene drawer fixing bin 7 again at the drawer opening 4 of the next column template with the same structure, and circulating sequentially.

After the construction column template 1 is removed, the periphery of the top of the construction column 22 is blocked even by adopting flexible materials or foaming materials or low-strength mortar, so that the steel bars are prevented from rusting.

By adopting the method, except that a very small amount of mortar is arranged in gaps among the foam board 6 in the drawer fixing bin, the foam board 8 in the drawer movable bin and the three-surface annular lath 2 on the inner side of the top of the constructional column template 1, namely the gap between the vertical steel bars 3 of the constructional column, the full-isolation effect is basically realized between the concrete of the cantilever beam 13 and the concrete of the constructional column 22, and the concrete effect is shown in a concrete isolation schematic diagram of the top of the constructional column and the concrete of the cantilever beam in fig. 10.

The utility model discloses a construction quality and safety and effective reduction construction cost are ensured to the cantilever beam 13 and the synchronous technological method who is under the cantilever beam constructional column 22 construction, through designing an effective method assurance realize both when under the synchronous construction cantilever beam 13 and the cantilever beam the abundant isolation of constructional column 22 concrete.

Firstly, the three-face annular lath 2 is additionally arranged on the inner side of the top of the constructional column template 1, so that the concrete (the concrete of a steel bar protection layer part) on the periphery of the constructional column 22 is fully isolated from the concrete of the cantilever beam 13; secondly, a drawer opening 4 is reserved at the top of the constructional column template 1 at the position where the constructional column template 1 and the cantilever beam template 14 are positioned on the same vertical surface, and a high-lubricity drawer fixing bin with a concrete pouring hole 11 and a foam board 6 in the drawer fixing bin is inserted, so that the upper and lower smooth pouring and the effective sealing of the periphery of the constructional column concrete are realized; thirdly, a slurry overflow hole 17 is formed in the position 20-25mm away from the bottom of the drawer opening 4 in the top of the constructional column template 1, the drawer movable bin 10 with the foam boards 8 in the drawer movable bin laid thereon is pushed and closed in time when concrete flows out of the slurry overflow hole 17, and embedding is completed by removing the foam boards 8 in the drawer movable bin, so that effective isolation of the subsequent poured concrete of the constructional column 22 from the poured concrete is completed.

Claims (4)

1. A template for construction of a constructional column under a cast-in-place reinforced concrete cantilever beam is provided with a constructional column template and a cantilever beam template and is characterized in that one surface, positioned on the same plane, of the vertical surfaces of the constructional column template and the cantilever beam template is provided with a drawer opening, the lower part of the drawer opening is provided with a grout overflow hole, the drawer opening is inserted with a drawer fixing bin, and the inner sides of the tops of the other three surfaces of the constructional column template are provided with three-surface annular laths; a drawer movable bin which can be matched in a drawing manner is arranged in the drawer fixed bin, and concrete pouring holes are formed in the upper plate and the lower plate of the drawer fixed bin; the method comprises the following steps of reinforcing a constructional column template by adopting constructional column template vertical square timbers, constructional column template horizontal steel timbers, constructional column template split bolt sizing blocks and constructional column template split bolts, and reinforcing an cantilever beam template by adopting cantilever beam template horizontal square timbers and cantilever beam template vertical steel timbers; the end of the drawer fixed bin is plugged with a foam board in the drawer fixed bin, the foam board in the drawer movable bin is laid in the drawer movable bin, and the foam board in the drawer movable bin are tightly squeezed with the foam board in the drawer fixed bin.

2. The form panel for construction of a cast-in-place reinforced concrete cantilever beam lower constructional column according to claim 1, wherein the distance between the grout outlet position and the bottom of the drawer fixing bin is 20-25 mm.

3. The form for construction of the cast-in-place reinforced concrete cantilever beam lower constructional column according to claim 1, wherein the drawer fixing bin is a cuboid, and an outer opening of the drawer fixing bin is provided with a U-shaped flanging along the height direction.

4. The form for construction of the constructional column under the cast-in-place reinforced concrete cantilever beam of claim 1, characterized in that the drawer handle is arranged outside the movable drawer bin, and the length and height of the handle are required to meet the requirement of inserting the fixed drawer bin.

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