阅读说明：本技术 一种预制拼装空心模壳连接结构及其施工方法 (Prefabricated assembled hollow formwork connecting structure and construction method thereof ) 是由 葛继平 苏玖坤 王志强 李云燕 于 2021-08-12 设计创作，主要内容包括：本发明提供了一种预制拼装空心模壳连接结构,其特征在于,包括：预制的模壳柱身和设于预制模壳柱身下方的承台；模壳柱身包括模壳本体和上连接装置,模壳本体上具有上下贯穿模壳本体且用于进行二次浇筑的浇筑孔,上连接装置包括设置于围成浇筑孔的模壳本体上的第一上连接装置和设置于所属模壳本体上的第二上连接装置；承台包括承台本体和下连接装置,下连接装置包括第一下连接装置和第二下连接装置,用于配合连接第一上连接装置的第一连接装置安装在承台本体,用于配合连接第二连接装置的第二连接装置安装承台本体上。(The invention provides a connecting structure of a prefabricated assembled hollow formwork, which is characterized by comprising the following components in percentage by weight: the prefabricated formwork column body and the bearing platform are arranged below the prefabricated formwork column body; the formwork column comprises a formwork body and an upper connecting device, wherein the formwork body is provided with a pouring hole which vertically penetrates through the formwork body and is used for secondary pouring, and the upper connecting device comprises a first upper connecting device arranged on the formwork body which surrounds the pouring hole and a second upper connecting device arranged on the formwork body; the bearing platform comprises a bearing platform body and a lower connecting device, the lower connecting device comprises a first lower connecting device and a second lower connecting device, the first connecting device used for being connected with the first upper connecting device in a matched mode is arranged on the bearing platform body, and the second connecting device used for being connected with the second connecting device in a matched mode is arranged on the bearing platform body.)

1. The utility model provides a hollow mould shell connection structure is assembled in prefabrication which characterized in that includes: the prefabricated formwork column body and the bearing platform are arranged below the prefabricated formwork column body;

the formwork column comprises a formwork body and an upper connecting device, wherein a pouring hole which vertically penetrates through the formwork body and is used for secondary pouring is formed in the formwork body, and the upper connecting device comprises a first upper connecting device arranged on the formwork body which surrounds the pouring hole and a second upper connecting device arranged on the formwork body;

the bearing platform comprises a bearing platform body and a lower connecting device, the lower connecting device comprises a first lower connecting device and a second lower connecting device, the first connecting device which is used for being connected with the first upper connecting device in a matched mode is installed on the bearing platform body, and the second connecting device which is used for being connected with the second connecting device in a matched mode is installed on the bearing platform body.

2. The connecting structure of a prefabricated hollow shuttering recited in claim 1, wherein said first upper connecting means are a plurality of spacing bars uniformly distributed, said spacing bars having spacing portions extending out of the lower surface of the shuttering body, the first lower connecting means are metal corrugated pipes corresponding to said spacing bars one by one, said metal corrugated pipes are disposed in said bearing platform body, and said metal corrugated pipes have slots for placing said spacing portions.

3. The prefabricated hollow formwork connecting structure of claim 2, wherein the number of the limiting steel bars is twelve, and the number of the metal corrugated pipes is twelve.

4. The connecting structure of the prefabricated hollow formwork shell as claimed in claim 1, 2 or 3, wherein the second upper connecting device comprises fixed steel bars and grouting sleeves, the grouting sleeves are uniformly distributed on the lower surface of the formwork body, the fixed steel bars are uniformly distributed in the formwork body and correspond to the grouting sleeves one by one, the bottom of each fixed steel bar is provided with a fixed part extending into the grouting sleeve, the second lower connecting device is a stable steel bar, the stable steel bar is arranged in the bearing platform body, and the stable steel bar is provided with a connecting part for connecting and extending into the grouting sleeve.

5. The prefabricated hollow formwork connecting structure of claim 4, wherein the end of the stabilizing steel bar inside the bearing platform body is provided with a bending part, and the direction of the bending part is a direction far away from the center of the bearing platform.

6. A prefabricated hollow shuttering connecting structure as claimed in claim 5, wherein the angle between said bending part and said stabilizing reinforcing bar is 90 °.

7. The prefabricated hollow formwork connection structure of claim 4, wherein the second lower connection device further comprises connecting cross bars for connecting the stabilizing bars in sequence and forming an integral body, the connecting cross bars being located in the bearing platform.

8. A construction method of a prefabricated hollow formwork connecting structure, characterized in that the construction method of a formwork connecting structure of a prefabricated hollow formwork connecting structure as claimed in any one of claims 1 to 7 comprises the following steps:

step S1: fixedly placing the bearing platform on an external pile foundation and fixing;

step S2: placing the formwork column body on a bearing platform, and pouring concrete to form fixed connection between the formwork column body and the bearing platform;

step S3: and (4) secondary pouring, wherein pouring holes of the formwork column body are poured to form a whole between the formwork column body and the bearing platform to complete the installation of the prefabricated body.

Technical Field

The invention relates to the technical field of fixed connection of prefabricated parts, in particular to a prefabricated assembled hollow formwork connecting structure and a construction method thereof.

Background

At present, China is in the brisk development stage of infrastructure construction, the engineering structure forms are various, but a reinforced concrete structure is taken as a main part, a steel structure, a wood structure and a masonry structure are taken as auxiliary parts, the concrete structure is also taken as a main construction form by on-site pouring, in order to respond to the national call and implement the concepts of green, environment-friendly and energy-saving construction, the concept of building industrialization is gradually proposed, a prefabricated assembly type technology matched with the construction technology is produced, the construction technology is a great change in the construction history, and is an important measure for promoting ecological civilized construction in the field of infrastructure construction, the assembly type technology not only can save labor force, reduce construction pollution, improve the engineering quality and the construction efficiency, but also is an important link for implementing the concepts of ecological construction and developing green and energy-saving construction roads.

The existing prefabricated structure adopts the technical scheme that a component to be installed is poured in advance and then is fixedly connected through a connecting structure.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a connecting structure of a prefabricated assembled hollow formwork, and the technical scheme of the invention is as follows:

a prefabricated hollow formwork connecting structure comprises: the prefabricated formwork column body and the bearing platform are arranged below the prefabricated formwork column body;

the formwork column comprises a formwork body and an upper connecting device, wherein a pouring hole which vertically penetrates through the formwork body and is used for secondary pouring is formed in the formwork body, and the upper connecting device comprises a first upper connecting device arranged on the formwork body which surrounds the pouring hole and a second upper connecting device arranged on the formwork body;

the bearing platform comprises a bearing platform body and a lower connecting device, the lower connecting device comprises a first lower connecting device and a second lower connecting device, the first connecting device which is used for being connected with the first upper connecting device in a matched mode is installed on the bearing platform body, and the second connecting device which is used for being connected with the second connecting device in a matched mode is installed on the bearing platform body.

In the technical scheme, the first upper connecting device is matched with the first lower connecting device, the second upper connecting device is matched with the second lower connecting device to form fixed connection between the formwork column body and the bearing platform, and the formwork column body and the bearing platform are fixedly connected through double-layer fixed connection in the technical scheme.

On the basis of the above scheme and as a preferable scheme of the scheme: the first upper connecting device is a plurality of limiting reinforcing steel bars which are uniformly distributed, the limiting reinforcing steel bars are provided with limiting parts extending out of the lower surface of the formwork body, the first lower connecting device is metal corrugated pipes which correspond to the limiting reinforcing steel bars one to one, the metal corrugated pipes are arranged in the bearing platform body, and the metal corrugated pipes are provided with slots for placing the limiting parts. In the technical scheme, the first upper connecting device is specifically a limiting steel bar, the first lower connecting device is a metal corrugated pipe, a limiting part of the limiting steel bar enters the slot of the metal corrugated pipe and then is fixedly connected through pouring concrete, the inner wall of the slot is of a corrugated structure, and the tensile pulling-resistant bearing capacity of the whole formed by the membrane shell cylinder and the bearing platform is further improved

On the basis of the above scheme and as a preferable scheme of the scheme: twelve limiting steel bars are arranged, and twelve metal corrugated pipes are arranged. The technical scheme is that the concrete distribution and number of the limiting reinforcing steel bars are adopted.

On the basis of the above scheme and as a preferable scheme of the scheme: connecting device includes fixed reinforcing bar and grout sleeve on the second, grout sleeve equipartition in the lower surface of mould shell body, fixed reinforcing bar equipartition in this is internal to the mould shell, just fixed reinforcing bar with grout sleeve one-to-one, each the bottom of fixed reinforcing bar has stretches into fixed part in the grout sleeve, connecting device is stabilizer bar under the second, stabilizer bar set up in this is internal to the bearing platform, just stabilizer bar has and is used for connecting and stretches into the telescopic connecting portion of grout. In this technical scheme, a second connecting device and a concrete structure of connecting device under the second.

On the basis of the above scheme and as a preferable scheme of the scheme: the end part of the stabilizing reinforcing steel bar in the bearing platform body is provided with a bending part, and the direction of the bending part is the direction far away from the center of the bearing platform. The bending part in the technical scheme can provide better anti-drawing bearing capacity for bending in the direction away from the center of the bearing platform.

On the basis of the above scheme and as a preferable scheme of the scheme: the included angle between the bending part and the stabilizing reinforcing steel bar is 90 degrees. The portion of bending and the contained angle between the reinforcing bar of bending are 90 among this technical scheme, improve the stability ability between stabilizer bar and the cushion cap, and 90 structural design of the portion of bending can still can remain stable when making the portion of bending receive the impact force from top to bottom.

On the basis of the above scheme and as a preferable scheme of the scheme: the second lower connecting device further comprises connecting cross ribs for sequentially connecting the stabilizing reinforcing bars and enabling the stabilizing reinforcing bars to form a whole, and the connecting cross ribs are located in the bearing platform. According to the technical scheme and the cross connecting ribs, the stabilizing steel bars are connected and form a whole, so that the integrity of the stabilizing steel bars and the bearing platform main body is improved, and the anti-pulling bearing capacity in the vertical direction is improved.

A construction method of a prefabricated hollow formwork connecting structure comprises the following steps:

step S1: fixedly placing the bearing platform on an external pile foundation and fixing;

step S2: placing the formwork column body on a bearing platform, and pouring concrete to form fixed connection between the formwork column body and the bearing platform;

step S3: and (4) secondary pouring, wherein pouring holes of the formwork column body are poured to form a whole between the formwork column body and the bearing platform so as to complete the installation of the prefabricated body.

According to the technical scheme, the construction method of the prefabricated assembled hollow formwork connecting structure is provided, and the formwork column and the shell form a stable whole through twice pouring.

Compared with the prior art, the invention has the following beneficial effects:

1. the formwork column body and the bearing platform form a whole by adopting the connection of the grouting sleeve and the stabilizing steel bar and the connection of the metal corrugated pipe and the limiting steel bar, and then the formwork column body and the bearing platform are cast for the second time through the remaining casting holes and by adopting micro-expansion concrete, so that the formwork column body forms extrusion force for the connection structure, and the connection stability between the formwork column body and the bearing platform is improved. Grout sleeve and metal bellows distribute inside column casing and cushion cap respectively to this has compensatied the unbalance nature and the inhomogeneity of single connection, and grout sleeve distributes in the mould shell outer lane and is convenient for the slip casting, and the metal bellows buries in the inner circle simultaneously and has avoided the difficult problem of slip casting.

2. The prefabricated assembled hollow formwork connecting structure provided by the invention has reliable structural overall connection stress, the matching of the limiting steel bar and the metal corrugated pipe and the matching of the stabilizing steel bar and the grouting sleeve can provide better anti-pulling bearing capacity for the formwork connecting structure overall structure in the vertical direction, under the condition of bearing horizontal load, the structure has better lateral movement resistance rigidity and can provide good shearing resistance and bending resistance bearing capacity, the structure is horizontal and vertical, the resistance of the structure is not lower than that of a cast-in-place structure, and the performance of the connecting part is enhanced and the damage cannot occur at the connecting part; the scheme can increase the durability of the system, fewer field templates are installed, and the material expenditure is saved; the prefabricated components are firm and regular, the quality is reliable, the hoisting, the installation and the construction are convenient, the vertical connection construction of the vertical components is easy under the complex condition, and the connection quality of the column body and the bearing platform can be better ensured; the structure positioning is accurate enough, and the construction tolerance is large; the construction time on site is short, the labor cost is reduced, the construction period can be shortened, and the engineering efficiency, the engineering quality and the economic benefit are improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic diagram of a connection structure provided by an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the invention A-A;

FIG. 3 is a schematic structural diagram of the bearing platform of the embodiment of the invention;

FIG. 4 is a schematic view of a prefabricated form pillar in an embodiment of the present invention;

FIG. 5 is a schematic view of the positioning and assembling of the prefabricated formwork column and the bearing platform according to the embodiment of the present invention;

FIG. 6 is a schematic view showing the assembly of a prefabricated formwork column and a bearing platform according to an embodiment of the present invention;

FIG. 7 is a schematic view of a secondary placement of micro-expansive concrete according to an embodiment of the present invention;

description of reference numerals: 1. a formwork column body; 11. a formwork body; 12. fixing the steel bars; 121. a fixed part; 13. grouting a sleeve; 14. limiting the reinforcing steel bars; 141. a limiting part; 15. pouring holes; 2. a bearing platform; 21. a cushion cap body; 22. stabilizing the reinforcing steel bar; 221. a connecting portion; 222. a bending part; 23. a metal bellows; 231. a slot; 3. cross ribs are connected.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

For a better illustration of the invention, the following detailed description of the invention is given in conjunction with the accompanying drawings.

The first embodiment is as follows:

the utility model provides a hollow mould shell connection structure is assembled in prefabrication includes prefabricated mould shell shaft 1 and cushion cap 2, mould shell shaft 1 includes mould shell body 11 and goes up connecting device, mould shell body 11 is equipped with the hole 15 of pouring that runs through from top to bottom, it goes up connecting device including setting up connecting device on pouring the first on the mould shell internal surface of hole 15 place and setting up and mould shell body 11 in the second connecting device, cushion cap 2 includes cushion cap 2 main part and lower connecting device, lower connecting device including set up in cushion cap body 21 instinct and with first connecting device matched with first connecting device under with set up in cushion cap body 21 and on the second connecting device matched with second under connecting device. In this embodiment, the first upper connecting device is a plurality of limiting steel bars 14 uniformly arranged on the inner surface of the formwork, the limiting steel bars 14 have limiting parts 141 extending out of the lower surface of the formwork body 11, the number of the limiting steel bars 14 is twelve, the corresponding first lower connecting device is twelve metal corrugated pipes 23 uniformly arranged in the bearing platform body 21 for placing the limiting parts 141, the second upper connecting device comprises fixed steel bars 12 and grouting sleeves 13, the grouting sleeves 13 are arranged on the lower surface of the formwork body 11, the twelve grouting sleeves 13 are uniformly arranged on the lower surface of the formwork body 11, the fixed steel bars 12 are arranged inside the formwork body 11, the end parts of the fixed steel bars 12 are provided with fixing parts 121 extending into the grouting sleeves 13, the second lower connecting device is stable steel bars 22, the stable steel bars 22 are arranged in the bearing platform body 21, the stable steel bars 22 correspond to the grouting sleeves 13 one by one, the stabilizing reinforcing bar 22 has a connecting portion 221 for connecting and extending into the grouting sleeve 13, and it should be noted that in this embodiment, the tail portion of the stabilizing reinforcing bar 22 has a bent portion 222 for improving the stability between the stabilizing reinforcing bar 22 and the bearing platform body 21, specifically, the direction of the bent portion 222 is a direction away from the center of the bearing platform body 21, and the bending angle is 90 °.

In this embodiment, when the formwork body 11 is placed on the bearing platform 2, the connecting portion 221 of the stabilizing steel bar 22 is located in the grouting sleeve 13, the limiting portion 141 of the limiting steel bar 14 is located in the slot 231 of the metal corrugated pipe 23, the stabilizing steel bar 22 and the grouting sleeve 13 form a fixed connection fit and the limiting steel bar 14 and the metal corrugated pipe 23 form a fixed connection fit by pouring concrete, and the stability between the integral reinforcing film shell of the micro-expansion concrete and the bearing platform body 21 is formed by pouring the micro-expansion concrete in the pouring hole 15.

Twelve stabilizing steel bars 22 are preset inside the bearing platform body 21, the bottom of each stabilizing steel bar 22 has a bent portion 222 for improving the stability of connection between the formwork body 11 and the bearing platform body 21, but each stabilizing steel bar 22 is independently arranged in the bearing platform body 21, in order to improve the fixity between the stabilizing steel bar 22 and the bearing platform body 21, a horizontal connecting rib 3 is arranged in the bearing platform body 21 of the embodiment, the horizontal connecting rib 3 is used for connecting the stabilizing steel bars 22 so that the twelve stabilizing steel bars form a whole, and the stability performance of the stabilizing steel bars 22 and the bearing platform body 21 is improved.

As shown in fig. 3, in the specific structure of the bearing platform 2 in this embodiment, the bearing platform 2 includes a bearing platform body 21 and a lower connecting device disposed in the bearing platform body 21, the lower connecting device in this embodiment includes a stabilizing reinforcement 22, a metal bellows 23 and a connecting reinforcement 3, the top of the stabilizing reinforcement 22 has a connecting portion 221 extending out of the upper surface of the bearing platform body 21, the bottom of the stabilizing reinforcement 22 further has a bent portion 222 away from the center of the bearing platform body 21 and having a 90 ° bend with the stabilizing reinforcement 22, and the connecting reinforcement 3 is used for connecting the stabilizing reinforcement 22 to form an integral body with the stabilizing reinforcement 22.

As shown in fig. 4, in the concrete structure of the formwork column 1 in this embodiment, the membrane casing column includes a formwork body 11 and an upper connecting device, the upper connecting device includes a fixed steel bar 12, a grouting sleeve 13 and a limiting steel bar 14, the formwork body 11 is provided with a pouring hole 15 penetrating up and down, the limiting steel bar 14 is located on the formwork body 11 forming the pouring hole 15, the limiting steel bar 14 has a connecting portion 221 extending out of the formwork body 11, the grouting sleeve 13 is disposed on a lower surface of the formwork body 11, the fixed steel bar 12 is located inside the formwork body 11, and the bottom of the fixed steel bar 12 extends into the upper half portion of the grouting sleeve 13.

As shown in fig. 2, in the top view of the bearing platform 2 of this embodiment, in this embodiment, the number of the limiting reinforcing bars 14 is twelve, the first circles of the limiting reinforcing bars 14 are uniformly distributed, the number of the fixing reinforcing bars 12 is twelve, the second circles of the fixing reinforcing bars 12 are uniformly distributed, and the first circles and the second circles are concentric circles.

Example two:

a construction method of a prefabricated hollow formwork connecting structure comprises the following steps:

step S1: the bearing platform 2 is fixedly placed on an external pile foundation and is fixed; in this embodiment, the bearing platform 2 is moved to the position above the pile foundation to be installed by the crane, the bearing platform 2 is slowly put down, the bearing platform 2 is fixed on the pile foundation, and the connecting portion 221 of the stabilizing steel bar 22 in the bearing platform 2 is vertically upward.

Referring to fig. 3-6, step S2: the formwork column body 1 is placed on the bearing platform 2, and concrete is poured, so that the formwork column body 1 and the bearing platform 2 are fixedly connected; in this embodiment, as shown in fig. 5, firstly, the formwork column 1 is lifted to the position right above the bearing platform 2 by a crane, the direction of the formwork body 11 is adjusted, so that the limiting portions 141 of the limiting reinforcing steel bars 14 correspond to the slots 231 of the metal corrugated pipes 23 one by one, the grouting sleeves 13 correspond to the connecting portions 221 of the stabilizing reinforcing steel bars 22 one by one, then the formwork column 1 is slowly lowered, as shown in fig. 6, until the limiting portions 141 of the limiting reinforcing steel bars 14 completely enter the corresponding slots 231, and the connecting portions 221 of the stabilizing reinforcing steel bars 22 completely enter the corresponding grouting sleeves 13, and concrete is poured into the slots 231 of the metal corrugated pipes 23 and the grouting sleeves 13, respectively, so that the formwork column 1 and the bearing platform 2 are fixedly connected.

Referring to fig. 7, step S3: and (4) secondary pouring, wherein a pouring hole 15 of the formwork column body 1 is poured to form an integral prefabricated body between the formwork column body 1 and the bearing platform 2 to complete the installation of the prefabricated body. In the embodiment, micro-expansion concrete is adopted when the pouring hole 15 is poured, and the micro-expansion concrete is used for integrally compacting the structure and connecting the reinforced grouting sleeve 13 with the longitudinal bar of the metal corrugated pipe 23, so that the prefabricated formwork column body 1 and the bearing platform 2 are finally connected into a reliable integral structure.

Example three:

a construction method of a prefabricated hollow formwork connecting structure comprises the steps of pouring a bearing platform 2 on site during construction, embedding a metal corrugated pipe 23 in an inner ring, reserving a stabilizing steel bar 22 in an outer ring, inserting a limiting part 141 of a limiting steel bar 14 in the inner ring of a prefabricated formwork column body 1 into an insertion groove 231 of the metal corrugated pipe 23, inserting a connecting part 221 of the stabilizing steel bar 22 in the outer ring of the bearing platform 2 into a grouting sleeve 13 of the formwork column body 1, respectively performing concrete pouring on the grouting sleeve 13 and the metal corrugated pipe 23 to enable the formwork column body 1 and the bearing platform 2 to be connected and fixed preliminarily, pouring micro-expansion concrete into a pouring hole 15 after splicing and positioning are completed, maintaining and forming, and finishing construction.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications within the scope of the claims and any combination of the embodiments described above may be made by those skilled in the art without affecting the essence of the present invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.