CN113957993A - Assembly system and construction method thereof - Google Patents

Abstract

The invention discloses an assembly system and a construction method thereof, relates to the technical field of buildings, and aims to solve the problem of node connection. The prefabricated girder sets up along first direction, and links to each other with two adjacent prefabricated posts, and prefabricated girder part stretches into in the prefabricated post. The prefabricated secondary beam is arranged along a second direction, the second direction is perpendicular to the first direction, and the end part of the prefabricated secondary beam is connected with the prefabricated main beam. The end part of the prefabricated floor slab is connected with the prefabricated secondary beam. The invention is used for multi-storey assembly buildings.

Description

Assembly system and construction method thereof

Technical Field

The invention relates to the technical field of buildings, in particular to an assembly system and a construction method thereof.

Background

In multi-storey building, because prefabricated girder and prefabricated secondary beam have great weight, consequently, need carry out full hall to prefabricated girder and prefabricated secondary beam during the installation and prop to guarantee that prefabricated girder and prefabricated secondary beam can normally be installed, so, the construction degree of difficulty is big, with high costs, and the difficulty is handled to the junctional node.

Disclosure of Invention

The embodiment of the invention provides an assembly system and a construction method thereof, which solve the problems of node connection in the traditional multi-storey building and the need of adding support at the bottom of a beam during construction.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in one aspect, an embodiment of the present invention provides an assembly system, which includes prefabricated columns, prefabricated main beams, prefabricated secondary beams, and prefabricated floor slabs.

The prefabricated girder sets up along first direction, and links to each other with two adjacent prefabricated posts, and prefabricated girder part stretches into in the prefabricated post. The prefabricated secondary beam is arranged along a second direction, the second direction is perpendicular to the first direction, and the end part of the prefabricated secondary beam is connected with the prefabricated main beam. The end part of the prefabricated floor slab is connected with the prefabricated secondary beam.

The embodiment of the invention provides an assembly system, and the prefabricated main beam is partially extended into the prefabricated column, so that the prefabricated column can bear the load of the prefabricated main beam, the original supporting structure at the lower part of the prefabricated main beam is omitted, the construction difficulty is reduced, and the construction procedures are reduced. Because the precast columns can form a load bearing to the ends of the precast girders, the handling of the joints between the precast columns and the precast girders is easier.

Furthermore, the depth of the prefabricated main beam part extending into the prefabricated column is 30-60 mm.

Furthermore, the prefabricated secondary beam comprises a secondary beam body, one part of the end part of the secondary beam body extends out to form a protrusion, and the other part of the end part of the secondary beam body forms an installation groove; the bulges are at least partially lapped on the prefabricated main beam, and the part of the prefabricated main beam is positioned in the mounting groove.

Furthermore, a plurality of shear steel bars are pre-embedded in the prefabricated secondary beam, and one part of the shear steel bars is positioned between two adjacent prefabricated floor slabs.

Further, the depth of the mounting groove in the second direction is 80 mm-120 mm.

Further, the prefabricated secondary beam further comprises shear-resistant steel sections and joint bars. One part of the shear-resistant steel is embedded in the secondary beam body, and the other part of the shear-resistant steel is embedded in the protrusion. The bulge is provided with a grouting hole, and the grouting hole penetrates through the shear-resistant steel into the prefabricated main beam. The joint bar is positioned in the grouting hole, and part of the joint bar is positioned in the prefabricated main beam.

Furthermore, the secondary beam further comprises a plurality of studs, the shear-resistant steel is an H-shaped steel plate, the studs are fixed on a web plate of the H-shaped steel plate, and the grouting holes vertically penetrate through the web plate of the H-shaped steel plate.

Further, the assembly system also comprises connecting steel bars, straight steel bars and plate gluten. The connecting reinforcing steel bars are arranged above the prefabricated secondary beam, two ends of each connecting reinforcing steel bar are respectively lapped on two adjacent prefabricated floor slabs, and the parts of the connecting reinforcing steel bars are bent towards one side of the prefabricated secondary beam to form arc sections. The straight reinforcing bars are located on the plurality of arc-shaped sections. And plate gluten is arranged on one side of the joint between the prefabricated floor slab and the prefabricated floor slab, which is far away from the prefabricated secondary beam.

Further, gaps and surfaces among the prefabricated main beams, the prefabricated secondary beams and the prefabricated floor slab are provided with cast-in-place concrete.

On the other hand, the embodiment of the invention also provides a construction method of the assembly system, which comprises the assembly body in any one of the technical schemes. The construction method of the assembly system comprises the following steps:

and step S1, mounting the prefabricated column.

And step S2, hoisting the prefabricated main beam between two adjacent prefabricated columns, wherein the prefabricated main beam part extends into the prefabricated columns.

And step S3, hoisting the prefabricated secondary beam between two adjacent prefabricated main beams.

And step S4, hoisting the precast slab between two adjacent precast secondary beams.

And S5, casting concrete in situ, and casting the prefabricated columns, the prefabricated main beams, the prefabricated secondary beams and the prefabricated floor slabs into a whole.

And step S6, repeating the step S2 to the step S5 until the construction is finished.

The construction method of the assembly system provided by the embodiment of the invention and the assembly system provided by the embodiment of the invention can obtain the same technical effect, and the details are not repeated herein.

Drawings

FIG. 1 is a schematic view of a preformed column provided by the present invention;

FIG. 2 is a top partial schematic view of an assembly provided by the present invention;

FIG. 3 is a schematic view of a connection relationship between a prefabricated main beam and a prefabricated column provided by the invention;

FIG. 4 is a diagram of a connection node of a prefabricated column and a prefabricated girder provided by the invention;

FIG. 5 is a schematic view of a prefabricated secondary beam provided by the present invention;

FIG. 6 is a schematic side view of a prefabricated secondary beam provided by the present invention;

FIG. 7 is a schematic view of the connection between the prefabricated main beams and the prefabricated secondary beams provided by the invention;

FIG. 8 is a schematic top view of a prefabricated primary beam and a prefabricated secondary beam provided by the present invention;

FIG. 9 is a schematic side view of a prefabricated primary beam and a prefabricated secondary beam provided by the present invention;

FIG. 10 is a schematic view of the connection between the precast floor slab and the precast secondary beam according to the present invention;

fig. 11 is a schematic view of positions of the plate surface bar, the connecting bar, and the straight bar according to the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; either directly or through the interior of the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the invention provides an assembly system for a multi-layer concrete structure building, which comprises a plurality of prefabricated columns 1, wherein the prefabricated columns 1 are arranged on a plane where XY is located along the Z direction in parallel, as shown in figure 1. The assembly system further comprises a prefabricated main beam 2, a prefabricated secondary beam 3 and a prefabricated floor slab 4. As shown in fig. 2, a plurality of precast main beams 2 are arranged in parallel with a first direction (i.e., Y direction in fig. 2) and are parallel in the same plane, the precast main beams 2 are located between two adjacent precast columns 1 (plane where XY is located), and end portions of the precast main beams 2 extend into the precast columns 1. Between two adjacent prefabricated main beams 2 (XY-plane) there are also arranged a number of prefabricated secondary beams 3, the ends of which prefabricated secondary beams 3 are connected to the prefabricated main beams 2, wherein the prefabricated secondary beams 3 are arranged in parallel to a second direction (i.e. the X-direction in fig. 2), which is perpendicular to the first direction. Between two adjacent prefabricated secondary beams 3 (Y direction), a plurality of prefabricated floor slabs 4 are arranged, and the end portions of the prefabricated floor slabs 4 are connected with the prefabricated secondary beams 3.

In addition, the gaps and the surfaces among the prefabricated main beams 2, the prefabricated secondary beams 3 and the prefabricated floor slabs 4 are poured with concrete, so that the structure is poured into a whole.

It should be noted that the second direction mentioned in the embodiments of the present application is approximately perpendicular to the first direction, which allows for errors during construction. In other embodiments of the present application, in order to meet the requirements of on-site construction, there may be an angle between the prefabricated main beam 2, the prefabricated secondary beam 3 and the prefabricated floor slab 4.

As shown in fig. 3, vertical steel bars 11 are arranged inside the prefabricated columns 1, and the prefabricated columns 1 of each layer are connected through the vertical steel bars 11 by pouring concrete. In this way, the precast column 1 portions between the upper and lower floors can be connected to form an integral structure.

The connection node between the precast main beam 2 and the precast column 1 is illustrated below, for example, in some embodiments of the present application, as shown in fig. 4, the precast column 1 has a plurality of vertical reinforcing bars 11 in the middle, the precast main beam 2 has a bottom reinforcing bar 22 at the end thereof, and a reinforcing bar anchoring plate 22 is disposed on the bottom reinforcing bar 22, and the bottom reinforcing bar 22 and the reinforcing bar anchoring plate 22 extend above the precast column 1 and cross the vertical reinforcing bars 11. The end part of the prefabricated main beam 2 extends into the outer side of the vertical steel bar 11 of the prefabricated column 1, and the extending depth can be 30-60 mm. When the stretching depth is less than 30mm, because the stretching part is too short, the stress surfaces of the two ends of the prefabricated main beam 2 are relatively small, so that the weight of the whole prefabricated main beam 2 is not enough to be supported, and the bottom of the prefabricated main beam 2 still needs to be supported when the prefabricated main beam 2 is hoisted and installed, so that the labor cost is increased, and the construction difficulty is increased. When stretching into the degree of depth and being greater than 60mm, owing to stretch into too deeply, lead to vertical reinforcing bar 11 in the prefabricated post 1 just need reduce in order to guarantee that prefabricated post 1 has sufficient space to supply prefabricated girder 2 to get into, under this condition, vertical reinforcing bar 11 in the prefabricated post 1 reduces and can lead to the partial joint strength reduction that prefabricated post 1 connects, and the intensity of whole prefabricated post 1 itself also can reduce, so, can influence the intensity of whole building, can cause the hidden danger to whole building safety.

Thus, the end of the precast main beam 2 may extend into the precast column 1 to 30mm, 50mm, and 60mm, as examples. Therefore, not only can guarantee that there are sufficient vertical reinforcing steel 11 in the precast column 1 thereby the joint strength between the precast column 1 and the intensity of precast column 1 itself about guaranteeing, can also ensure that precast column 1 can form strong support to precast girder 2 to also can hoist precast girder 2 and install under the condition that does not use the support.

The structure of the above-mentioned prefabricated sub-beam 3 is exemplified below, for example, in some embodiments of the present application, as shown in fig. 5, the prefabricated sub-beam 3 includes a sub-beam body 301, a portion of an end of the sub-beam body 301 is protruded to form the protrusion 31, and another portion of the end of the sub-beam body 301 forms the mounting groove 32. In order to increase the strength of the entire prefabricated sub-girder 3, as shown in fig. 6, a plurality of shear reinforcements 33 may be pre-embedded in the prefabricated sub-girder 3, and the shear reinforcements 33 may be disposed at equal intervals on the top of the prefabricated sub-girder 3.

As shown in fig. 7, the protrusion 31 at least partially overlaps the precast main beam 2, and a portion of the precast main beam 2 is located in the installation groove 32. So, for the mode of prefabricated secondary beam 3 and the installation of laminating of prefabricated main girder 2 in the past, thereby this application can realize the support to prefabricated secondary beam 3 through the arch 31 at prefabricated secondary beam 3 both ends, under this condition, just need extra support during the installation prefabricated secondary beam 3, has not only reduced the construction degree of difficulty, has accelerated the construction progress moreover to also can increase the bearing of whole prefabricated secondary beam 3 after the construction.

The connection node between the prefabricated secondary beam 3 and the prefabricated main beam 2 is exemplified below, for example, in some embodiments of the present application, the depth of the installation groove 32 in the second direction may be 80mm to 120 mm. When the depth of the installation groove 32 in the second direction is less than 80mm, and at this time, since the remaining portion of the protrusion 31 forms the installation groove 32 at the end portion of the prefabricated sub-beam 3, the depth of the section of the protrusion 31 in the second direction is less than 80mm, the portion of the protrusion 31 overlapping the prefabricated main beam 2 is relatively reduced, and since the stress points of the whole prefabricated sub-beam 3 are concentrated on the protrusions 31 at both ends of the prefabricated sub-beam 3, the protrusion 31 at the end portion of the prefabricated sub-beam 3 is not enough to support the whole prefabricated sub-beam, so that the bottom portion of the prefabricated sub-beam 3 needs additional support, thereby ensuring the construction. When the depth of the installation groove 32 in the second direction is greater than 120mm, the depth of the corresponding protrusion 31 in the second direction is longer, and because the depth of the prefabricated main beam 2 in the second direction is limited, and the prefabricated secondary beams 3 are connected to both sides of the prefabricated main beam 2, if the protrusion 31 is too long, the installation of the prefabricated main beam 2 in the corresponding prefabricated secondary beam 3 on the other side is affected.

Thus, the mounting grooves 32 may have depths of 80mm, 100mm, and 120mm in the second direction, for example. In this way, the installation of the prefabricated secondary beam 3 on the prefabricated main beam 2 is not affected, and the protrusion 31 can bear the weight of the whole prefabricated secondary beam 3.

In order to further enhance the connection strength between the prefabricated main beam 2 and the prefabricated secondary beam 3, as shown in fig. 8, the prefabricated secondary beam 3 may further include shear-resistant steel 36, a part of which is embedded in the secondary beam body 301, and the other part of which is embedded in the protrusion 31. As shown in fig. 9, grouting holes 34 are formed in the protrusions 31, and the grouting holes 34 penetrate the shear-resistant steel 36 into the precast main girders 2. The dowel 35 is located in the grout hole 34, and a part of the dowel 35 is located in the precast main girder 2. The prefabricated secondary beam 3 further comprises a plurality of studs 37, the shear-resistant steel 36 is an H-shaped steel plate, the studs 37 are fixed on a web plate of the H-shaped steel plate, and the grouting holes 34 vertically penetrate through the web plate of the H-shaped steel plate.

Thus, the shear-resistant steel sections 36 and the studs 37 can increase the bearing capacity of the protrusion 31, the field-site insertion of the studs 35 into the grouting holes 34 can be adopted, the grouting holes 34 are grouted, and the shear-resistant steel sections 36 and the studs 37 are matched to further increase the shear strength of the prefabricated secondary beam 3 and the prefabricated main beam 2.

As shown in fig. 10, in order to cast a unitary structure between adjacent prefabricated floor slabs 4, the assembly system further includes slab gluten 5, connecting reinforcing bars 6, and straight reinforcing bars 7. Wherein, as shown in fig. 11, above the prefabricated secondary beam 3, two ends of the connecting steel bars 6 are located on two adjacent prefabricated floor slabs 4 (in fig. 11, the direction of the front view is shown, and the connecting steel bars 6 are not shown), the connecting steel bars 6 can be arranged at equal intervals, the part of the connecting steel bars 6 is bent towards one side of the prefabricated secondary beam 3 to form an arc-shaped section, and the straight steel bars 7 are located on the arc-shaped sections. And a slab gluten 5 is arranged on one side of the joint between the prefabricated floor slab 4 and the prefabricated floor slab 4, which is far away from the prefabricated secondary beam 3. Because the connecting steel bars 6 and the straight steel bars 7 are arranged in a crossed manner, and the straight steel bars 7 and the plate surface ribs 5 are arranged in a crossed manner, the stress is more uniform. And all there is connecting reinforcement 6 and board gluten 5 to consolidate at the upside of 4 junctions of precast floor slab, so, after pouring the concrete, the joint strength of the junction between precast floor slab 4 is higher, and the bearing effect is better.

In addition, because the position that connecting reinforcement 6 is located the middle part has decurrent segmental arc, so, straight reinforcing bar 7 just can be more steady holding in this segmental arc, can not take place to move from opposite directions, and it is higher to make the back stability of pouring between connecting reinforcement 6 and the straight reinforcing bar 7.

In this case, since the shear bars 33 are provided on the top of the precast sub-girder 3, a part of the shear bars 33 are positioned in the gaps between the slab ribs 5, the connection bars 6, and the straight bars 7, and the other part of the shear bars 33 are positioned on the top of the precast sub-girder 3, so that the precast sub-girder 3 and the precast floor slabs 4 on both sides thereof can be integrally cast after the two precast floor slabs 4 are cast, and the shear bars 33 are perpendicular to the slab ribs 5, the connection bars 6, and the straight bars 7, in which case, the shear strength is stronger.

In addition, gaps and surfaces among the prefabricated main beams 2, the prefabricated secondary beams 3 and the prefabricated floor slabs 4 are provided with cast-in-place concrete, and the prefabricated main beams, the prefabricated secondary beams and the prefabricated floor slabs are cast into an integral structure with the prefabricated columns 1.

The embodiment of the invention also provides a construction method of the assembly system, which comprises the assembly body in any one of the technical schemes. The construction method of the assembly system comprises the following steps:

and step S1, installing the prefabricated column 1, correcting the prefabricated column 1, and grouting the prefabricated column 1.

And S2, hoisting the prefabricated main beam 2 between two adjacent prefabricated columns 1, extending the part of the prefabricated main beam 2 into the prefabricated columns 1, finely adjusting, and connecting the end part of the prefabricated main beam 2 with the prefabricated columns 1.

And step S3, hoisting the prefabricated secondary beam 3 between two adjacent prefabricated main beams 2.

And step S4, hoisting the precast slab 4 between two adjacent precast secondary beams 3, and correcting the precast slab in place.

And step S5, casting concrete in situ, and casting the precast columns 1, the precast main beams 2, the precast secondary beams 3 and the precast floor slabs 4 into a whole.

And step S6, repeating the step S2 to the step S5 until the construction is finished.

It should be noted that, this application does not do the restriction to the pouring order between prefabricated post 1, prefabricated girder 2, prefabricated secondary beam 3 and prefabricated floor 4, satisfies to pour above-mentioned component as an organic whole can. And the prefabricated column 1 mentioned in the present application may include an upper prefabricated column 1 and a lower prefabricated column 1, and the prefabricated main beam 2 partially extends between the upper and lower prefabricated columns 1. Thereby go up prefabricated post 1 and adopt reinforced concrete to connect as an organic whole with lower prefabricated post 1 between in turn and form the prefabricated post 1 of this application.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An assembly system, comprising:

prefabricating a column;

the prefabricated main beam is arranged along a first direction and is connected with two adjacent prefabricated columns, and the prefabricated main beam part extends into the prefabricated columns;

the prefabricated secondary beam is arranged along a second direction, the second direction is perpendicular to the first direction, and the end part of the prefabricated secondary beam is connected with the prefabricated main beam; and the number of the first and second groups,

and the end part of the precast floor slab is connected with the precast secondary beam.

2. An assembly system according to claim 1,

the depth of the prefabricated main beam part extending into the prefabricated column is 30-60 mm.

3. An assembly system according to claim 1 or 2,

the prefabricated secondary beam comprises a secondary beam body, one part of the end of the secondary beam body extends out to form a protrusion, the other part of the end of the secondary beam body forms an installation groove, at least part of the protrusion is overlapped on the prefabricated main beam, and part of the prefabricated main beam is located in the installation groove.

4. An assembly system according to claim 3,

and a plurality of shear steel bars are pre-embedded in the prefabricated secondary beam, and one part of the shear steel bar is positioned between two adjacent prefabricated floor slabs.

5. An assembly according to claim 3, wherein the depth of the mounting groove in the second direction is in the range 80mm to 120 mm.

6. An assembly system according to claim 3, wherein the precast secondary beam further comprises:

one part of the shear-resistant section steel is embedded in the secondary beam body, and the other part of the shear-resistant section steel is embedded in the protrusion;

a grouting hole is formed in the bulge and penetrates through the shear-resistant steel to the prefabricated main beam;

and the joint bar is positioned in the grouting hole, and part of the joint bar is positioned in the prefabricated main beam.

7. The assembly system of claim 6, wherein the secondary beam further comprises a plurality of studs, the shear steel is H-shaped steel plate, the plurality of studs are fixed on the web of the H-shaped steel plate, and the grouting holes vertically penetrate through the web of the H-shaped steel plate.

8. An assembly system according to claim 1, further comprising:

connecting reinforcing steel bars, wherein two ends of the connecting reinforcing steel bars are respectively lapped on two adjacent prefabricated floor slabs above the prefabricated secondary beam, and the parts of the connecting reinforcing steel bars are bent towards one side of the prefabricated secondary beam to form arc sections,

the straight reinforcing steel bars are positioned on the arc-shaped sections;

the slab gluten, the precast floor with junction between the precast floor keeps away from one side of precast secondary beam is provided with the slab gluten.

9. An assembly system according to any one of claims 1 or 8, wherein the gaps and surfaces between the primary, secondary and floor slabs are of cast in place concrete.

10. A construction method for an assembly system according to any one of claims 1 to 9, comprising the steps of:

step S1, mounting the prefabricated column;

step S2, hoisting the prefabricated main beam between two adjacent prefabricated columns, wherein the prefabricated main beam part extends into the prefabricated columns;

step S3, hoisting the prefabricated secondary beam between two adjacent prefabricated main beams;

step S4, hoisting the precast slab between two adjacent precast secondary beams;

step S5, concrete is poured in situ, and the prefabricated columns, the prefabricated main beams, the prefabricated secondary beams and the prefabricated floor slabs are poured into a whole;

and step S6, repeating the step S2 to the step S5 until the construction is finished.

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