阅读说明：本技术 异形曲面无梁楼板清水混凝土施工方法 (Bare concrete construction method for special-shaped curved surface beamless floor ) 是由 高峰 金锦阳 杨熠欣 艾雪飞 朱文莉 于 2021-07-30 设计创作，主要内容包括：本发明涉及混凝土施工领域,具体涉及一种异形曲面无梁楼板清水混凝土施工方法,包括以下步骤：A、建模设计,B、放线,C、模板安装,D、涂刷模板脱模剂,E、安装钢筋,F、浇筑混凝土,G、养护拆模,H、整体涂刷保护剂,步骤C中的模板包括板体和多个凸块,板体的内部设有液腔,板体上表面上设有与液腔连通的凸块腔,凸块滑动位于凸块腔中；步骤D中,对模板涂刷脱模剂之前,使凸块位于凸块腔中,凸块的顶部与板体的顶部齐平,然后对板体的顶部以及凸块的顶部涂抹脱模剂,然后使凸块从凸块腔中滑出。本方案解决了施工过程中模板涂抹脱模剂比较费事的问题。(The invention relates to the field of concrete construction, in particular to a method for constructing bare concrete of a special-shaped curved surface beamless floor slab, which comprises the following steps: A. c, installing a steel bar, F, pouring concrete, G, maintaining and removing the formwork, H, integrally coating a protective agent, wherein the formwork in the step C comprises a plate body and a plurality of convex blocks, a liquid cavity is formed in the plate body, a convex block cavity communicated with the liquid cavity is formed in the upper surface of the plate body, and the convex blocks are located in the convex block cavity in a sliding mode; and D, before the mold release agent is coated on the template, enabling the bump to be located in the bump cavity, enabling the top of the bump to be flush with the top of the plate body, then coating the mold release agent on the top of the plate body and the top of the bump, and enabling the bump to slide out of the bump cavity. The scheme solves the problem that the coating of the mold release agent on the template in the construction process is troublesome.)

1. The construction method of the bare concrete of the special-shaped curved surface beamless floor slab comprises the following steps: A. modeling design, B, paying off, C, template installation, D, painting template release agent, E, installing reinforcing steel bars, F, pouring concrete, G, maintenance and form removal, H, integrally painting protective agent, and is characterized in that: the template in the step C comprises a plate body and a plurality of convex blocks, wherein a liquid cavity is formed inside the plate body, a convex block cavity communicated with the liquid cavity is formed in the upper surface of the plate body, and the convex blocks are slidably positioned in the convex block cavities; and D, before the mold release agent is coated on the template, enabling the bump to be located in the bump cavity, enabling the top of the bump to be flush with the top of the plate body, then coating the mold release agent on the top of the plate body and the top of the bump, and enabling the bump to slide out of the bump cavity.

2. The method for constructing the bare concrete of the special-shaped curved surface beamless floor slab as claimed in claim 1, wherein: in the step A, simulation design is carried out by adopting Auto CAD and Rhino software.

3. The method for constructing the bare concrete of the special-shaped curved surface beamless floor slab as claimed in claim 2, wherein: and step B, performing three-dimensional lofting, and performing projection construction by adopting laser points.

4. The method for constructing the bare concrete of the special-shaped curved surface beamless floor slab as claimed in claim 3, wherein: in step F, the slump of the concrete is 200 +/-20 mm, and the expansibility is preferably 500-550 mm.

5. The method for constructing the bare concrete of the special-shaped curved surface beamless floor slab as claimed in claim 4, wherein: and E, cleaning oil stains, paint stains and floating skins on the surface of the steel bar before the steel bar is installed, coating the steel bar surface cleaned up with the steel bar rust inhibitor twice, wherein the thickness of each layer is 1-2 mm, protecting a finished product after the coating is finished, and covering the finished product with a plastic film after the rust inhibitor is dried.

6. The method for constructing the bare concrete of the special-shaped curved surface beamless floor slab as claimed in claim 1, wherein: and the inner wall of the outlet of the lug cavity is fixedly connected with a liquid suction block.

7. The method for constructing the bare concrete of the special-shaped curved surface beamless floor slab as claimed in claim 1, wherein: the template also comprises an arc-shaped frame body, the plate body is also arc-shaped, an arc-shaped channel is arranged between the frame body and the plate body, driving rods are fixedly connected to the lugs and are connected with the plate body in a sliding manner, one ends of the driving rods, far away from the lugs, are positioned in the channel, one ends of the driving rods, positioned in the channel, are provided with inclined planes, and the inclined planes face the top of the frame body; the top end of the frame body is detachably connected with a driving roller, and the driving roller can roll in the channel; and a locking mechanism for locking the driving rod is arranged on the plate body.

Technical Field

The invention relates to the field of concrete construction, in particular to a method for constructing bare concrete of a special-shaped curved surface beamless floor slab.

Background

The beamless floor slab is characterized in that the floor slab is not provided with a beam, and the slab is directly supported on a column and is mainly used for buildings such as exhibition halls, shops, warehouses and the like with large floor loads. The special-shaped curved-surface beamless floor slab is characterized in that the floor slab is curved instead of planar in order to improve the ornamental degree and aesthetic feeling of buildings.

The method for constructing the bare concrete of the special-shaped curved surface beamless floor slab mainly comprises the following steps: modeling optimization design → refined paying-off → template installation → template release agent painting → reinforcing steel bar installation → concrete pouring → maintenance and form removal → protective agent painting on the whole.

In order to meet the stress requirements of large span and large overhang, the current floor slab adopts a structure similar to a waffle. Because the floor adopts "wafer" structure, consequently proposed higher requirement to the structure of template, present template includes plate body and lug, and the setting of lug can make the floor form the structure of wafer, when the equipment template, needs additionally assemble the lug to the plate body, and the operation is troublesome. When the mold release agent is smeared on the template, due to the arrangement of the convex block, the surface of the plate body is uneven, the top surface of the convex block needs to be smeared, and the side surface of the convex block needs to be smeared, so that the mold release agent is smeared on the plate body with more trouble and more troublesome operation.

Disclosure of Invention

The invention aims to provide a method for constructing bare concrete of a special-shaped curved surface beamless floor slab, which solves the problem that the coating of a mold release agent on a template in the construction process is troublesome.

In order to achieve the purpose, the invention adopts the following technical scheme: the construction method of the bare concrete of the special-shaped curved surface beamless floor slab comprises the following steps: A. c, installing a steel bar, F, pouring concrete, G, maintaining and removing the formwork, H, integrally coating a protective agent, wherein the formwork in the step C comprises a plate body and a plurality of convex blocks, a liquid cavity is formed in the plate body, a convex block cavity communicated with the liquid cavity is formed in the upper surface of the plate body, and the convex blocks are located in the convex block cavity in a sliding mode; and D, before the mold release agent is coated on the template, enabling the bump to be located in the bump cavity, enabling the top of the bump to be flush with the top of the plate body, then coating the mold release agent on the top of the plate body and the top of the bump, and enabling the bump to slide out of the bump cavity.

The principle and the advantages of the scheme are as follows: according to the scheme, the bare concrete construction of the special-shaped curved surface beamless floor is realized through the steps A-H. The liquid cavity is used for containing a release agent. In step D, before the mold release agent is coated on the template, the convex block is positioned in the convex block cavity, the top of the convex block is flush with the top of the plate body, so that when the mold release agent is coated on the top of the plate body, the convex block does not protrude, the top of the plate body is smooth, the convex block cannot obstruct and influence the coating of the mold release agent on the top of the plate body, and meanwhile, in the process of coating the mold release agent on the top of the plate body, the mold release agent can also be coated on the top of the convex block by the way, and the mold release agent does not need to be additionally coated on the top of the convex block. And then the bump slides out of the bump cavity, and the liquid cavity contains the release agent, so that the release agent is automatically adhered to the side surface of the bump sliding out of the bump cavity, the release agent does not need to be additionally coated on the side surface of the bump, and the operation is simple and convenient. Therefore, the problem that the release agent is coated on the template in the construction process is troublesome is solved through the scheme.

In addition, the lug is arranged in the lug cavity in the scheme, the lug and the plate body are connected into a whole, so that in the assembling process of the die plate in the step C, the lug only needs to be pushed out from the lug cavity, the lug and the plate body do not need to be connected and assembled, and the operation is simple and convenient. In addition, when the template is not used, the lug is positioned in the lug cavity, the lug does not occupy a certain space volume, and the space occupation of the lug is saved.

Preferably, as an improvement, in step a, the Auto CAD and Rhino software are used for simulation design. Thereby, a modeling design is achieved.

Preferably, as an improvement, in the step B, three-dimensional lofting is performed, and projection construction is performed by using a laser spot. Therefore, fine paying-off can be performed on the special-shaped curved surface through three-dimensional lofting.

Preferably, as a modification, in the step F, the concrete slump is 200 +/-20 mm, and the spreading degree is preferably 500mm-550 mm.

Preferably, as an improvement, in the step E, before the steel bar is installed, oil stain, paint stain and floating skin on the surface of the steel bar are removed, the steel bar surface which is cleaned up is coated with the steel bar rust inhibitor twice, the thickness of each layer is 1mm-2mm, after the coating is finished, the finished product is protected, and after the rust inhibitor is dried, the finished product is covered with a plastic film. Therefore, the bonding effect of the steel bars and the concrete is better.

Preferably, as an improvement, the inner wall of the outlet of the lug cavity is fixedly connected with a liquid suction block. Therefore, the liquid absorption block can absorb the release agent in the liquid cavity, and the release agent is coated on the side wall of the bump by the liquid absorption block, so that the release agent can be coated on the part of the bump which is not located in the liquid cavity. Of course, the liquid sucking block may not be provided because the part of the top of the projection which is not located in the liquid cavity has a smaller volume.

Preferably, as an improvement, the template further comprises an arc-shaped frame body, the plate body is also arc-shaped, an arc-shaped channel is arranged between the frame body and the plate body, the protruding blocks are fixedly connected with driving rods, the driving rods are connected with the plate body in a sliding manner, one ends of the driving rods, far away from the protruding blocks, are positioned in the channel, one ends of the driving rods, positioned in the channel, are provided with inclined planes, and the inclined planes face the top of the frame body; the top end of the frame body is detachably connected with a driving roller, and the driving roller can roll in the channel; the plate body is provided with a locking mechanism for locking the driving rod. From this, the template installation finishes and the top of the plate body paints the release agent after finishing, loosen the drive roller at support body top, the drive roller rolls downwards in the passageway under the effect of gravity, the drive roller rolls the tip department of each actuating lever downwards in proper order, when the drive roller rolls the position on the inclined plane of actuating lever, promote the inclined plane on the actuating lever, the actuating lever drives the lug and from the automatic roll-off in the lug chamber, like this at the roll in-process of drive roller, realized that a plurality of lugs are from the plate body in proper order automatic release, need not the manual work and release the lug from the lug chamber, the efficiency that the lug released from the plate body has been improved, thereby the efficiency of construction has been improved, and easy operation is convenient. The locking mechanism is used for locking the driving rod, so that after the lug is pushed out of the plate body, the lug cannot reset into the lug cavity, and the lug can keep a protruding state from the plate body.

Drawings

Fig. 1 is a front sectional view of a die plate.

Fig. 2 is an enlarged view of a in fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a support rod 1, a frame body 2, a roller frame 3, an air bag 4, a driving roller 5, a roller belt 6, a support frame 7, a plate body 8, a channel 9, a convex block 10, a driving rod 11, a clamping groove 12, a piston rod 13, a piston 14, a pressure spring 15, a liquid suction block 16, an air inlet 17, a spray pipe 18 and a pipe frame 19.

Example 1

Substantially as shown in figures 1-2 of the drawings.

The construction method of the bare concrete of the special-shaped curved surface beamless floor slab comprises the following steps:

A. modeling design, and adopting Auto CAD and Rhino software to carry out simulation design. And the bearing capacity calculation adopts sample safety calculation software to carry out safety calculation.

B. And paying off, performing three-dimensional lofting, and performing projection construction by adopting laser points. Therefore, fine paying-off can be performed on the special-shaped curved surface through three-dimensional lofting. And horizontally cutting the corresponding elevation of each required node on the rhino 1:1 three-dimensional solid model to form a plane graph, picking up the coordinates of the control point, and lofting and controlling by using a high-precision total station.

C. The formwork is installed, for example, by taking a part of the formwork, as shown in fig. 1-2, the formwork comprises a frame body 2, a plate body 8 and a plurality of convex blocks 10, and the frame body 2 and the plate body 8 are both arc-shaped, so that the formwork can be suitable for floor slab construction with special-shaped curved surfaces. The bottom of the frame body 2 is fixedly provided with a support rod 1 through a bolt. The plate body 8 is located the top of support body 2, is connected with support frame 7 between plate body 8 and the support body 2, is equipped with curved passageway 9 between plate body 8 and the support body 2. The inside of plate body 8 is equipped with curved liquid chamber, is equipped with the lug chamber with the liquid chamber intercommunication on the plate body 8 upper surface, and the lug 10 slides and is located the lug chamber. The inner wall of the outlet of the lug cavity can be fixedly connected with a liquid absorption block 16 in a bonding mode according to needs, and the liquid absorption block 16 in the embodiment is made of cotton or sponge. All be equipped with the pole hole through screw fixedly connected with actuating lever 11 on the bottom of lug 10 on the plate body 8, actuating lever 11 passes the pole hole and with 8 sliding connection of plate body, the bottom of actuating lever 11 is arranged in passageway 9, the bottom of actuating lever 11 all is equipped with the inclined plane, the inclined plane towards the top of support body 2. Can dismantle on the top of support body 2 and be connected with drive roller 5, it is specific, the welding has roller frame 3 on the top of support body 2, has tied between roller frame 3 and the support body 2 and has connect roller area 6, and drive roller 5 is tied by roller area 6. The drive roller 5 is able to roll in the channel 9. The plate body 8 is provided with a plurality of locking mechanisms for locking the driving rod 11. The locking mechanism in the embodiment comprises a piston cavity, a piston 14 is connected in the piston cavity in a sliding manner, a piston rod 13 is fixedly connected to the piston 14, a pressure spring 15 is connected between one end, far away from the piston rod 13, of the piston 14 and the end part of the piston cavity, an air inlet 17 is formed in the piston cavity, and the air inlet 17 and the pressure spring 15 are located on two sides of the piston 14; the drive rod 11 is provided with a slot 12 located below the piston rod 13, and the end of the piston rod 13 abuts against the side wall of the drive rod 11. An air bag 4 is fixedly bonded on the roller frame 3, and air pipes are connected between the air bag 4 and the air inlet 17.

D. And (3) coating a template release agent, positioning the bumps 10 in the bump cavities before coating the release agent on the template, enabling the tops of the bumps 10 to be flush with the tops of the plate bodies 8, then coating the release agent on the tops of the plate bodies 8, and meanwhile, coating the release agent on the tops of the bumps 10. Then the roller belt 6 is loosened, the roller belt 6 does not bind the driving roller 5 any more, the driving roller 5 rolls downwards in the channel 9 under the action of gravity, the driving roller 5 rolls downwards to the end parts of the driving rods 11 in sequence, when the driving roller 5 rolls to the position of the inclined plane of the driving rod 11, the inclined plane on the driving rod 11 is pushed, the driving rod 11 drives the convex blocks 10 to automatically slide out of the convex block cavities, and therefore in the rolling process of the driving roller 5, the plurality of convex blocks 10 are sequentially and automatically pushed out of the plate body 8 without manually pushing the convex blocks 10 out of the convex block cavities.

After the driving roller 5 moves downwards, the driving roller 5 does not extrude the air bag 4, gas in the piston cavity enters the air bag 4, air pressure in the piston cavity is reduced, the elastic force of the pressure spring 15 is greater than the pressure of the gas in the piston cavity, so when the clamping groove 12 on the driving rod 11 moves upwards to the position of the piston rod 13, the piston 14 pushes the piston rod 13 leftwards under the action of the pressure spring 15, the piston rod 13 is clamped in the clamping groove 12, the driving rod 11 is locked, and after the lug 10 is pushed out of the plate body 8, the lug 10 cannot reset to enter the lug cavity, and the lug 10 can keep a convex state on the plate body 8.

The bump 10 slides out of the bump cavity, and the liquid cavity contains the release agent, so the release agent is automatically adhered to the side surface of the bump 10 sliding out of the bump cavity, the release agent does not need to be additionally coated on the side surface of the bump 10, and the operation is simple and convenient.

E. Installing the steel bars, cleaning oil stains, paint stains and floating skins on the surfaces of the steel bars before installing the steel bars, coating the steel bar rust inhibitor on the cleaned surfaces of the steel bars twice, wherein the thickness of each layer is 1-2 mm, protecting finished products after coating, and covering the finished products with a plastic film after the rust inhibitor is dried.

F. Concrete is poured, and the slump of the concrete in the embodiment is preferably 200 +/-20 mm, and the expansibility is preferably 500mm-550 mm.

G. And (3) maintaining and removing the formwork, wherein the strength of the concrete must meet the specified requirement, and the formwork is removed when the concrete is strictly forbidden to not meet the specified requirement of the design strength. After the template is detached, the template is placed on the open ground, the right end of the template is higher than the left end of the template, the driving roller 5 rolls from right to left in the channel 9 under the action of gravity, the driving roller 5 rolls to the left end of the template, the driving roller 5 extrudes the air bag 4, air in the air bag 4 enters the air inlet 17 through an air pipe and enters the piston cavity, air pressure in the piston cavity is larger than the elastic force of the compression spring 15, the piston 14 moves rightwards to extrude the compression spring 15, the piston 14 drives the piston rod 13 to move rightwards, the piston rod 13 comes out of the clamping groove 12, and therefore automatic unlocking of the driving rod 11 is achieved, the unlocked driving rod 11 can slide downwards, and the bump 10 can enter the plate body 8.

H. And (4) coating a protective agent on the whole.

Example 2

Referring to fig. 1, a pipe frame 19 slides on the top of the plate body 8 along the upper surface of the plate body 8, and the specific sliding mode is as follows: the top of the plate body 8 is provided with a sliding groove, and the pipe support 19 is welded with a sliding block positioned in the sliding groove. The pipe frame 19 is provided with a spray pipe 18, and the spray pipe 18 is provided with bristles. The bottom of the spray pipe 18 is provided with a liquid outlet, and the inside of the spray pipe 18 is provided with a release agent. In step D, the pipe frame 19 is slid, the pipe frame 19 drives the nozzle 18 to move, and the brush bristles move on the top of the plate body 8, so that the release agent is brushed on the top of the plate body 8 in a large area, and the operation is simple and convenient.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.