CN112227407B

CN112227407B - Connecting system and connecting method for prefabricated superposed foundation and prefabricated concrete column

Info

Publication number: CN112227407B
Application number: CN202011081874.6A
Authority: CN
Inventors: 侯和涛; 王宁; 孙冰; 杜志浩; 韩翔
Original assignee: Shandong University
Current assignee: Shandong University
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2022-04-01
Anticipated expiration: 2040-10-12
Also published as: CN112227407A

Abstract

The invention discloses a connecting system and a connecting method of a prefabricated superposed foundation and a prefabricated concrete column, belonging to the field of fabricated buildings. The precast concrete superposed foundation comprises a peripheral wall protecting plate and an inner partition plate, wherein the outer wall protecting plate is divided into a plurality of cavities by the inner partition plate, and the top of the inner partition plate is provided with a positioning groove; the bottom of the precast concrete column is provided with a reserved longitudinal rib, and the precast concrete superposed foundation and the precast concrete column are respectively provided with a positioning embedded part and a reserved hole; the edge of the bottom of the precast concrete column is clamped in the positioning groove, the positioning embedded part and the preformed hole are inserted in an up-and-down alignment mode, the reserved longitudinal rib is inserted into the cavity, and concrete is poured into the cavity. The invention solves the problems that the prior precast concrete foundation has overlarge self weight in the transportation and hoisting processes and the grouting connection quality of the steel bar sleeve is difficult to ensure, does not need to support templates, scaffolds and the like in the construction process, and has high efficiency and ensured quality.

Description

Connecting system and connecting method for prefabricated superposed foundation and prefabricated concrete column

Technical Field

The invention relates to the field of assembly type buildings, in particular to a connecting system and a connecting method of a prefabricated superposed foundation and a prefabricated concrete column.

Background

In a traditional construction method, a cast-in-place concrete foundation of a building and the like is connected with a concrete column by a method of on-site wet operation pouring. The method has the advantages of more field wet operation, mold erecting and disassembling, serious pollution, long construction period and higher cost. And this connected mode causes the intensive "putting up" phenomenon of reinforcing bar easily, the concrete placement work in later stage of being not convenient for.

In order to reduce the field wet operation and reduce the use of field templates as much as possible, the assembly type building is produced by the year. The concrete foundation and the concrete column are prefabricated in a factory and then transported to a construction site for hoisting and mounting, so that the use of site templates can be greatly reduced, and even the site templates can be omitted.

The precast concrete foundation of current assembly type structure is connected most adoption steel reinforcement sleeve grout with precast concrete post and is connected, and this kind of connected mode has following defect: the grouting connection of the steel bar sleeve is not easy to operate, and the on-site construction quality is not easy to detect, so that the construction quality is not easy to ensure; the material cost of the sleeve component is high, and the construction cost is greatly improved; in addition, the precast concrete foundation of the existing fabricated building is of a solid structure and has a heavy self-weight, and the requirements on machinery in the processes of hoisting, transportation and the like are high, so that the hoisting and transportation costs are increased.

Disclosure of Invention

The invention provides a connecting system and a connecting method of a prefabricated superposed foundation and a prefabricated concrete column, which solve the problems that the self weight of the prefabricated concrete foundation is overlarge in the transportation and hoisting processes, and the grouting connection quality of a steel bar sleeve is difficult to ensure, do not need to support templates, scaffolds and the like in the construction process, have high efficiency and ensure quality.

The technical scheme provided by the invention is as follows:

the utility model provides a prefabricated coincide basis and precast concrete column's connected system, includes precast concrete coincide basis and precast concrete column, wherein:

the precast concrete superposed foundation comprises a peripheral wall protecting plate and an inner partition plate arranged in the peripheral wall protecting plate, the inner partition plate divides a space surrounded by the peripheral wall protecting plate into a plurality of cavities, and the top of the inner partition plate is provided with a positioning groove;

the prefabricated concrete column is provided with reserved longitudinal ribs at the bottom, one of the top of the prefabricated concrete composite foundation and the bottom of the prefabricated concrete column is provided with a positioning embedded part, and the other one of the top of the prefabricated concrete composite foundation and the bottom of the prefabricated concrete column is provided with a reserved hole;

the bottom edge of the precast concrete column is clamped in the positioning groove, the positioning embedded part is inserted into the reserved hole in an up-and-down alignment mode, the reserved longitudinal rib is inserted into the cavity, and concrete is poured into the cavity, so that the precast concrete laminated foundation and the precast concrete column are connected into a whole.

Furthermore, the positioning embedded part is arranged at the top of the precast concrete superposed foundation and is positioned in the positioning groove on the inner partition plate, and the preformed hole is arranged at the bottom of the precast concrete column.

Furthermore, the inner baffle is cross-shaped, the inner baffle divides the space enclosed by the peripheral wall protecting plates into 4 cavities, the positioning grooves are cross-shaped, the number of the positioning grooves is 1, and the number of the positioning embedded parts is 4.

Furthermore, horizontal tie reinforcing mesh and stressed reinforcing mesh are arranged in the precast concrete laminated foundation, and longitudinal reinforcing mesh is arranged in the peripheral wall protecting plate and the inner partition plate.

Furthermore, the distance between the stress reinforcing mesh and the bottom surface of the precast concrete laminated foundation is 40-70mm, the depth of the positioning groove is not less than 60mm, and the thickness of the peripheral wall protecting plate and the inner partition plate is not less than 50 mm.

Furthermore, the reserved longitudinal bars are all inserted into the cavity, and the top surface of the concrete poured in the cavity is flush with the top surface of the precast concrete superposed foundation.

The connecting method of the connecting system of the prefabricated superposed foundation and the prefabricated concrete column is characterized by comprising the following steps:

hoisting and positioning the precast concrete superposed foundation to a flat ground;

hoisting the precast concrete column to be right above the precast concrete superposed foundation, ensuring that the reserved longitudinal ribs are inserted into the cavity, clamping the bottom edge of the precast concrete column in the positioning groove, and inserting the positioning embedded part and the reserved hole in an up-and-down alignment manner;

and pouring concrete into the cavity, so that the precast concrete superposed foundation and the precast concrete column are connected into a whole.

The invention has the following beneficial effects:

1. compared with the existing solid precast concrete foundation, the precast concrete superposed foundation provided by the invention is provided with the cavity, so that the self weight of the foundation is greatly reduced, the transport, installation and positioning of the precast concrete superposed foundation are facilitated, the requirement on hoisting equipment is low, and the construction is convenient.

2. The precast concrete superimposed foundation is connected with the precast concrete column without a steel bar grouting sleeve, the reserved longitudinal bars of the precast concrete column are directly anchored into the cavity of the foundation, and then concrete pouring is carried out on site. The cavity post-cast concrete of the precast concrete superposed foundation is effectively utilized, so that the precast concrete superposed foundation and the precast concrete column work as a whole, and the phenomenon of dense reinforcing steel bars is also avoided. The integral structure is good, the operation is simple, the construction is convenient, and the cost is saved.

3. Need not to prop up in the installation of precast concrete post and the concreting work progress in the cavity and establish template, scaffold frame etc. construction efficiency is high, the quality is guaranteed, saves the time limit for a project greatly.

4. Due to the use of the positioning groove and the positioning embedded part, the accurate installation and positioning of the precast concrete column are effectively ensured.

Drawings

Fig. 1 is a top view of a precast concrete laminated foundation (omitting the tie and stressed reinforcing mats);

fig. 2 is a schematic view of the longitudinal reinforcing mesh of the peripheral dado plate and the inner spacer;

fig. 3 is a schematic view of a stressed reinforcement mat of a precast concrete laminated foundation;

fig. 4 is a schematic view of a drawknot reinforcement mat of a precast concrete laminated foundation;

FIG. 5 is a sectional view taken along A-A of the precast concrete composite foundation;

FIG. 6 is a bottom view of a precast concrete column;

FIG. 7 is a side cross-sectional view of a precast concrete column;

fig. 8 is a schematic view of a connecting system of the prefabricated laminated foundation and the prefabricated concrete column of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Example 1:

an embodiment of the present invention provides a system for connecting a prefabricated composite foundation and a prefabricated concrete column, as shown in fig. 1 to 8, which includes a prefabricated concrete composite foundation 100 and a prefabricated concrete column 200, wherein:

the precast concrete superposed foundation 100 comprises an outer wall protecting plate 101 and an inner partition plate 102 arranged in the outer wall protecting plate 101, wherein the inner partition plate 102 divides a space surrounded by the outer wall protecting plate 101 into a plurality of cavities 103, and the top of the inner partition plate 102 is provided with a positioning groove 104.

The bottom of the precast concrete column 200 is provided with a reserved longitudinal rib 201, one of the top of the precast concrete composite foundation 100 and the bottom of the precast concrete column 200 is provided with a positioning embedded part 300, and the other is provided with a reserved hole 400.

The bottom edge card of precast concrete post 200 is in positioning groove 104, and location built-in fitting 300 aligns from top to bottom with preformed hole 400 and inserts, guarantees the rigidity of precast concrete post in later stage concrete placement process, avoids precast concrete post to take place to shift. In order to facilitate the alignment and insertion, the diameter of the preformed hole is not less than that of the positioning embedded part.

The reserved longitudinal ribs 201 are inserted into the cavity 103, and concrete is poured into the cavity 103, so that the precast concrete superposed foundation 100 and the precast concrete column 200 are connected into a whole to form integral joint work.

The present invention is applicable not only to industrial and civil buildings but also to structures, high-rise structures (e.g., wind power generation structures), and the like. When in use, the precast concrete superposed foundation is hoisted and positioned on the ground. Then the precast concrete column is hoisted to the position right above the precast concrete superposed foundation, the reserved longitudinal ribs are ensured to be inserted into the cavity, the edge of the bottom of the precast concrete column is clamped in the positioning groove, and the positioning embedded part and the reserved hole are inserted in an up-and-down alignment mode. And finally, pouring concrete into the cavity, and after the concrete is cured, reliably connecting the precast concrete superposed foundation with the precast concrete column.

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

As an alternative way of the embodiment of the present invention, the positioning embedded parts 300 are arranged on the top of the precast concrete laminated foundation 100 and in the positioning grooves 104 on the inner partition plate 102, and the prepared holes 400 are arranged on the bottom of the precast concrete column 200.

As a preferred embodiment of the present invention, the inner partition plate 102 is cross-shaped, the inner partition plate 102 divides the space surrounded by the peripheral baseboard 101 into 4 cavities 103, the positioning grooves 400 are cross-shaped, the number of the positioning grooves is 1, the number of the positioning embedded parts 300 is 4, and each positioning groove includes two positioning embedded parts.

Horizontal tie reinforcement meshes 105 and stress reinforcement meshes 106 are arranged in the prefabricated concrete laminated foundation 100, and longitudinal reinforcement meshes 107 are arranged in the peripheral wall panel 101 and the inner partition plate 102.

The horizontal tie reinforcement mesh ensures that the interior of the precast concrete superposed foundation has enough tie function, and the die expansion is prevented when concrete is cast in situ. The horizontal stress reinforcing mesh is arranged at the bottom of the precast concrete superposed foundation and can also be used as a tie bar. The longitudinal reinforcing mesh ensures the bearing capacity and rigidity of the precast concrete laminated foundation.

In a preferred embodiment, the stressed reinforcement mat 106 is spaced 40-70mm from the bottom surface of the prefabricated concrete laminated foundation 100 as a concrete protective layer thickness of the reinforcement. The depth of the positioning groove 104 is not less than 60mm, so that the positioning and the installation of the precast concrete column are facilitated. The thickness of the peripheral dado plate 101 and the inner bulkhead 102 is not less than 50 mm.

In order to ensure that the precast concrete superposed foundation is reliably connected with the precast concrete column, the reserved longitudinal ribs 201 are all inserted into the cavity 103, and the top surface of the concrete poured in the cavity 103 is flush with the top surface of the precast concrete superposed foundation 100.

And the length of the reserved longitudinal bar is determined by the required steel bar anchoring length, and if the vertical length of the reserved longitudinal bar is not enough, the reserved longitudinal bar can be bent to increase the anchoring length.

Example 2:

an embodiment of the present invention provides a connection method of a connection system between a prefabricated laminated foundation and a prefabricated concrete column described in embodiment 1, where as shown in fig. 8, the connection method includes:

s1: and hoisting and positioning the precast concrete superposed foundation 100 to the flat ground.

The precast concrete superimposed base is transported, hoisted and positioned after being precast in a factory, and the bottom of the precast concrete superimposed base is ensured to be smooth before the precast concrete superimposed base is installed. Because the precast concrete superimposed foundation is provided with the cavity, the dead weight can be greatly reduced, the transportation, the installation and the positioning of the precast concrete superimposed foundation are facilitated, the requirement on hoisting equipment is low, and the construction is convenient.

S2: the precast concrete column 200 is hoisted to the position right above the precast concrete superposed foundation 100, the reserved longitudinal ribs 201 are ensured to be inserted into the cavity 103, the edge of the bottom of the precast concrete column 200 is clamped in the positioning groove 104, and the positioning embedded part 300 is vertically aligned with the reserved hole 400 to be inserted, so that the precast concrete column is fixed without additionally erecting a formwork, erecting a scaffold and the like.

S3: after the precast concrete column is fixed, concrete is poured into the cavity 103 on site, and after the concrete is cured, the precast concrete superposed foundation 100 and the precast concrete column 200 are reliably and effectively connected into a whole, so that the construction quality is guaranteed, and the force transmission path is clear.

When pouring concrete, preferably make the concrete top surface layer after pouring and precast concrete coincide basic top surface parallel and level, guarantee precast concrete coincide basic wholeness and design elevation.

The connection method of the embodiment of the invention comprises all technical schemes of the prefabricated superposed foundation and the prefabricated concrete column in the embodiment 1, has the beneficial effects of the embodiment 1, and is not repeated herein. Other parts of this embodiment not mentioned above can be referred to the corresponding parts in the foregoing embodiment 1.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a prefabricated coincide basis and precast concrete column's connected system which characterized in that, includes precast concrete coincide basis and precast concrete column, wherein:

the inner partition board is in a cross shape, the space enclosed by the peripheral guard board is divided into 4 cavities by the inner partition board, the positioning grooves are in a cross shape, and the number of the positioning grooves is 1;

the bottom of the precast concrete column is provided with reserved longitudinal ribs and reserved holes, positioning embedded parts are arranged in positioning grooves in the inner partition plate, and the number of the positioning embedded parts is 4;

2. The system for connecting precast laminated foundations and precast concrete columns as claimed in claim 1, wherein horizontal tie and force-bearing reinforcing meshes are provided in the precast concrete laminated foundations, and longitudinal reinforcing meshes are provided in the outer wall panels and the inner partition panels.

3. The system for connecting a prefabricated laminated foundation and a prefabricated concrete column as claimed in claim 2, wherein the stress reinforcing mesh is spaced from the bottom surface of the prefabricated concrete laminated foundation by 40-70mm, the depth of the positioning groove is not less than 60mm, and the thickness of the peripheral wall protecting plate and the inner partition plate is not less than 50 mm.

4. The system for connecting a prefabricated laminated foundation and a prefabricated concrete column as claimed in claim 1, wherein the reserved longitudinal bars are all inserted into the cavity, and the top surface of the concrete poured in the cavity is flush with the top surface of the prefabricated concrete laminated foundation.

5. A method of connecting a prefabricated laminated foundation to a prefabricated concrete column connection system as claimed in any one of claims 1 to 4, said method comprising: