CN210562997U - Prefabricated column assembly - Google Patents

Abstract

The utility model discloses a prefabricated post subassembly relates to construction technical field for a plurality of sleeves in solving the prefabricated post of upper strata then can't aim at the many reinforcing bars in the prefabricated post of lower floor completely and influence construction quality's problem. The utility model discloses a prefabricated post subassembly includes prefabricated post and connecting piece, prefabricated post includes reinforcing bar, first section post and the second section post that many intervals set up, many reinforcing bars are worn to locate respectively first section post in the second section post, just the both ends of many reinforcing bars are located respectively first section post the terminal surface of second section post is outer, first section post and/or the second section post is equipped with bearing structure, bearing structure is used for supporting adjacent two prefabricated post is in order to give two reinforcing bar in the prefabricated post provides places the space, the connecting piece can respectively with one reinforcing bar in the prefabricated post, adjacent another reinforcing bar in the prefabricated post corresponds the welding.

Description

Prefabricated column assembly

Technical Field

The utility model relates to a construction technical field especially relates to a prefabricated post subassembly.

Background

With the development of modern industrial technology, the building house can be manufactured in batches and in sets like machine production, each part of the house is disassembled according to the design, and each part of the house is prefabricated in a factory and then transported to the actual construction site for assembly. Fabricated buildings have attracted interest since the beginning of the 20 th century and have been implemented in the sixties, the first attempts made in countries such as english, french, soviet union. The assembly type building has high construction speed and low production cost, and is rapidly popularized and developed all over the world. Early fabricated buildings were rather rigid and uniform in appearance. Later improvements in design have resulted in increased flexibility and versatility to allow modular construction not only in batch, but also in a wide variety of styles.

The existing fabricated building comprises prefabricated columns, connecting sleeves are installed on steel bars in the prefabricated columns, when two adjacent prefabricated columns are assembled up and down, because the steel bars in the prefabricated columns slightly deviate or the sleeves slightly deviate, a plurality of sleeves in an upper-layer prefabricated column cannot be completely aligned with a plurality of steel bars in a lower-layer prefabricated column, the steel bars in the lower-layer prefabricated column cannot enter the sleeves of the upper-layer prefabricated column to be connected and fixed, and only the inaccurate steel bars can be cut off, so that the prefabricated columns are high in construction difficulty, low in efficiency and low in connection strength; in addition, after the reinforcing bar in the prefabricated post of lower floor inserted the sleeve, still need for pouring into the thick liquids in the sleeve, the sleeve can not satisfy the thick liquids in the sleeve with the reinforcing bar is to inaccurate messenger thick liquids to the raw and other materials of thick liquids require highly, and the cost is expensive, and the ratio is difficult to master, and the grout is difficult to the full reality and targets in place, often leaves the space, makes the thick liquids easily ageing crushing, causes the reinforcing bar not hard up, and structural strength reduces, and influences building quality.

SUMMERY OF THE UTILITY MODEL

The utility model provides a prefabricated post subassembly for solve a plurality of sleeves in the prefabricated post of upper strata then can't aim at the problem that influences construction quality with many reinforcing bars in the prefabricated post of lower floor completely.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in a first aspect, the embodiment of the utility model provides a prefabricated column assembly, including prefabricated post and connecting piece, prefabricated post includes reinforcing bar, first festival post and the second festival post that many intervals set up, many reinforcing bars are worn to locate respectively first festival post in the second festival post, just the both ends of many reinforcing bars are located respectively first festival post the end face of second festival post is out of, first festival post and/or the second festival post is equipped with bearing structure, bearing structure is used for supporting adjacent two prefabricated post is in order to give two reinforcing bar in the prefabricated post provides places the space, the connecting piece can respectively with one reinforcing bar in the prefabricated post, adjacent another reinforcing bar in the prefabricated post corresponds the welding.

Optionally, the support structure includes a first boss formed by outward extension of one end of the first section column far away from the second section column and a second boss formed by outward extension of one end of the second section column far away from the first section column, projections of the first bosses on the horizontal plane are all located in projections of the first section column on the horizontal plane, projections of the second bosses on the horizontal plane are all located in projections of the second section column on the horizontal plane, and the first boss and the second boss are arranged oppositely.

Optionally, a first connecting structure is arranged on the first boss, a second connecting structure is arranged on the second boss corresponding to the first connecting structure, and the first connecting structure of one prefabricated column can be fixedly connected with the second connecting structure of another adjacent prefabricated column.

Optionally, the first connecting structure includes a plurality of first posts and first connecting plate of grabbing, and the one end of a plurality of first posts of grabbing all inserts in the first boss, a plurality of first posts of grabbing all with first connecting plate is connected, keep away from on the first connecting plate a side surface of second festival post surpasses the terminal surface setting of first boss, the second connecting structure includes a plurality of second posts of grabbing and second connecting plate, and a plurality of second posts of grabbing all insert in the second boss, a plurality of second posts of grabbing all with the second connecting plate is connected, the second connecting plate is kept away from a side surface of first festival post surpasss the terminal surface setting of second boss, one the first connecting plate of prefabricated post can with adjacent another the second connecting plate welding of prefabricated post.

Optionally, the projections of the first connecting plates on the horizontal plane are all located within the projections of the second connecting plates on the horizontal plane.

Optionally, the steel bar binding device further comprises a clamping member, and the clamping member is used for being bound on the outer sides of the steel bars.

Optionally, a beam reserved opening is formed between the first section column and the second section column.

Optionally, the height of the first section column is 1/4-1/2 of the height of the second section column.

In a second aspect, an embodiment of the present invention provides a construction method for the precast column assembly according to the above technical solution, including the following steps: the second prefabricated column is placed on the first prefabricated column; the connecting pieces are correspondingly welded with the first steel bars in the first prefabricated column and the second steel bars in the second prefabricated column respectively; and pouring the joint of the first prefabricated column and the second prefabricated column.

Optionally, the precast column assembly further includes a hoop member, and the construction method further includes, between the joints where the plurality of connecting members are welded and poured with the plurality of first reinforcing bars in the first precast column and the plurality of second reinforcing bars in the second precast column, respectively: the plurality of tightening members are fixedly tied to the outer sides of the plurality of first reinforcing bars and the plurality of second reinforcing bars, respectively.

Compared with the prior art, the embodiment of the utility model provides a precast column assembly and construction method thereof, many reinforcing bars in the precast column wear to locate in first section post, second section post respectively, and the both ends of many reinforcing bars are located the end face of first section post, second section post respectively outside; during specific construction, the second prefabricated column is placed on the first prefabricated column, the first prefabricated column supports the second prefabricated column through the supporting structure, a plurality of first reinforcing steel bars in the first prefabricated column and a plurality of second reinforcing steel bars in the second prefabricated column are located in the accommodating space supported by the supporting structure, a plurality of connecting pieces are welded with a plurality of first reinforcing steel bars in the first prefabricated column and a plurality of second reinforcing steel bars in the second prefabricated column correspondingly respectively, and finally the joint of the first prefabricated column and the second prefabricated column is poured. In above-mentioned whole work progress, need not many first reinforcing bars in the first prefabricated post and many second reinforcing bars in the prefabricated post of second to aim at completely, even stagger each other between the two, also can be in the same place through the connecting piece welding, the connection process of two prefabricated posts is visual, convenient operation has reduced the construction degree of difficulty, be convenient for detect, check and accept, and the cost is lower, joint strength is high, need not grout material and sleeve, various quality problems because of grout material arouses have been avoided, the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a precast column in a precast column assembly according to an embodiment of the present invention;

FIG. 2 is a perspective view of a connection between two precast columns in a precast column assembly according to an embodiment of the present invention;

fig. 3 is a partial schematic view illustrating a connection between two precast columns in the precast column assembly according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of a construction method of the precast column assembly according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, "and/or" is only one kind of association relation describing the association object, and means that there may be three kinds of relations, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Referring to fig. 1-3, the utility model discloses prefabricated post subassembly includes prefabricated post 1 and connecting piece 2, wherein, prefabricated post 1 includes the reinforcing bar 11 that many intervals set up, first section post 12 and second section post 13, wherein, many reinforcing bars 11 wear to locate first section post 12 respectively, in second section post 13, and the both ends of a plurality of reinforcing bars 11 are located first section post 12 respectively, the terminal surface of second section post 13 is out, first section post 12 is equipped with bearing structure, or second section post 13 is equipped with bearing structure, or first section post 12 and second section post 13 all are equipped with bearing structure, bearing structure is used for supporting two adjacent prefabricated posts 1 and provides the space of placing in order to provide for the reinforcing bar 11 in two prefabricated posts 1, connecting piece 2 can respectively with reinforcing bar 11 in one prefabricated post 1, reinforcing bar 11 in another adjacent prefabricated post 1 corresponds the welding.

Compared with the prior art, the embodiment of the utility model provides a prefabricated post subassembly includes prefabricated post 1, and in first section post 12, the second section post 13 were worn to locate respectively by many reinforcing bars 11 of prefabricated post 1, and the both ends of many reinforcing bars 11 are located respectively outside the terminal surface of first section post 12, second section post 13. During concrete construction, place the prefabricated post of upper strata on the prefabricated post of lower floor, the prefabricated post of lower floor passes through bearing structure and supports the prefabricated post of upper strata, and many reinforcing bars in the prefabricated post of lower floor and the prefabricated many reinforcing bars in the post of upper strata all are located the accommodation space that bearing structure propped, correspond welding a plurality of connecting pieces 2 with many reinforcing bars in the prefabricated post of lower floor respectively, many reinforcing bars in the prefabricated post of upper strata, pour the junction of prefabricated post of lower floor and the prefabricated post of upper strata at last. In above-mentioned whole work progress, need not many reinforcing bars in the prefabricated post of lower floor and the prefabricated post of upper strata in many reinforcing bars aim at completely, even stagger each other between the two, also can be in the same place through the welding of connecting piece 2, the connection process of two prefabricated posts is visual, convenient operation has reduced the construction degree of difficulty, is convenient for detect, checks and accepts, and joint strength is high, does not need grout material and sleeve, has avoided because of the various quality problems that grout material arouses, the cost is reduced.

Optionally, in some embodiments, the support structure is a first boss 14 formed by extending one end of the first section column 12 away from one end of the second section column 13, a projection of the first boss 14 on the horizontal plane is located in a projection of the first section column 12 on the horizontal plane, when the upper prefabricated column is placed on the lower prefabricated column, the first boss 14 at the lower end of the upper prefabricated column abuts against the end of the lower prefabricated column (or the bottom surface of the upper prefabricated column abuts against the first boss 14 at the upper end of the lower prefabricated column), and the steel bars in the upper prefabricated column and the steel bars in the lower prefabricated column are located in a height space where the first boss 14 is located; in another embodiment, the supporting structure is a second boss 15 formed by extending outward from one end of the second stud 13 away from the first stud 12, and the projections of the second boss 15 on the horizontal plane are both located in the projection of the second stud 13 on the horizontal plane, and when the two prefabricated studs 1 are assembled, the supporting structure is the same as the scheme in which the supporting structure is the first boss 14; the embodiment of the utility model provides a supporting structure is the combination of above-mentioned two kinds of supporting structure schemes, supporting structure includes first section post 12 on keep away from the first boss 14 of second section post 13 one end outwards extension formation, and keep away from the second boss 15 of the one end outwards extension formation of first section post 12 on second section post 13, the projection of first boss 14 on the horizontal plane all is located the projection of first section post 12 on the horizontal plane, the projection of second boss 15 on the horizontal plane all is located the projection of second section post 13 on the horizontal plane, first boss 14 sets up with second boss 15 relatively, when upper prefabricated post 1 is placed on lower floor prefabricated post 1, second boss 15 and the first boss 14 of lower floor prefabricated post 1 upper end of upper prefabricated post 1 lower extreme support and lean on, or first boss 14 of upper prefabricated post 1 lower extreme and the second boss 15 of lower floor prefabricated post 1 upper end support and lean on, thereby reinforcing bar 11 in upper prefabricated post 1 and reinforcing bar 11 in lower floor prefabricated post 1 support and lean on first boss 14 and second boss 15 support In the height space that two bosss 15 are located, because of this kind of scheme, can with the one end of reinforcing bar 11 can be between the terminal surface of first boss 14 and the terminal surface of first section post 12, or with the terminal surface parallel and level of first section post 12, the other end of reinforcing bar 11 can be between the terminal surface of second boss 15 and the terminal surface of second section post 13, or with the terminal surface parallel and level of second section post 13, if the in-process of transportation precast column 1 appears colliding, first boss 14 and second boss 15 can provide the protection for reinforcing bar 11 in it, avoid the both ends tip of reinforcing bar 11 to take place to buckle.

It should be noted that: the support structure comprises a plurality of first bosses 14 and a plurality of second bosses 15, or the support structure comprises a first boss 14 and a second boss 15, for the latter, the first boss 14 is arranged at the central position of the end surface of the first section column 12, the second boss 15 is arranged at the central position of the end surface of the second section column 13, and a plurality of reinforcing steel bars 11 are arranged at intervals and distributed around the periphery of the first boss 14 (and the second boss 15).

In order to further improve two prefabricated post 1 hookup location's joint strength, the utility model discloses be equipped with first connection structure 16 on the first boss 14 of embodiment, the position that second boss 15 corresponds first connection structure 16 is equipped with second connection structure 17, and the first connection structure 16 of a prefabricated post 1 can with the first connection structure 16 fixed connection of adjacent another prefabricated post 1 to the joint strength of two prefabricated post 1 hookup locations departments has been improved.

Alternatively, the first connecting structure 16 is a first connecting plate 162 fixed in the first boss 14, a side surface of the first connecting plate 162 far away from the second stud 13 is arranged beyond the end surface of the first boss 14, that is, the lower surface of the first connecting plate 162 is lower than the end surface of the first boss 14, or the upper surface of the first connecting plate 162 is higher than the end surface of the first boss 14, the second connecting structure 17 is a second connecting plate 172 fixed in the second boss 15, the lower surface of the second connecting plate 172 is lower than the end surface of the second boss 15, or the upper surface of the second connecting plate 172 is higher than the end surface of the second boss 15, and when two prefabricated studs 1 are connected, the first connecting plate 162 and the second connecting plate 172 are welded; alternatively, the first connecting structure 16 includes a plurality of first grasping posts 161 and a first connecting plate 162, one end of the plurality of first grasping posts 161 is inserted into the first boss 14, the other end of the plurality of second grasping posts 171 is connected to the first connecting plate 162, a side surface of the first connecting plate 162 remote from the second link 13 is disposed beyond an end surface of the first boss 14, the second connecting structure 17 includes a plurality of second grasping posts 171 and a second connecting plate 172, one end of the plurality of second grasping posts 171 is inserted into the second boss 15, the other end of the plurality of first grasping posts 161 is connected to the second connecting plate 172, a side surface of the second connecting plate 172 remote from the first link 12 is disposed beyond an end surface of the second boss 15, the first connecting plate 162 of one prefabricated post may be welded to the second connecting plate 172 of another adjacent prefabricated post, the first grasping posts 161 are inserted into the first link 12, the second grasping posts 171 are inserted into the second link 13, so that the first connecting structure 16 has a higher strength of connection with the first stud 12 and the second connecting structure 17 has a higher strength of connection with the second stud 13. The first connecting plate 162 and the second connecting plate 172 may be made of steel plates, and the first grasping column 161 and the second grasping column 171 may be made of steel bars. Optionally, the first connecting plate 162 and the second connecting plate 172 may be circular, rectangular, or square, specifically, the shapes of the first connecting plate 162 and the second connecting plate 172 may be selected according to actual requirements, and the first connecting plate 162 and the second connecting plate 172 adopt regular shapes as much as possible, so that uniformity of force transmission can be improved, and under the load action in different vector directions, the force applied to each region of the first connecting plate 162 and the second connecting plate 172 is the same or changes little. Accordingly, the shapes of the first and second nodes 12 and 13 may also adopt the above-described shapes.

It should be noted that: the first section of column 12, the first boss 14, the second section of column 13 and the second boss 15 are all precast concrete, the connecting piece 2 is a short steel bar, the first connecting plate 162 and the first boss 14 are identical in shape and size, and the second connecting plate 172 and the second boss 15 are identical in shape and size. Before assembling the precast column 1, the plurality of first catching columns 161 and the first connecting plates 162 of the first connecting structure 16 are welded as one body, and the plurality of second catching columns 171 and the second connecting plates 172 of the second connecting structure 17 are welded as one body, so that the first connecting structure 16 and the second connecting structure 17 can be conveniently installed at set positions.

In order to avoid first connecting plate 162 and second connecting plate 172 to be inaccurate and influence welding quality when two prefabricated post 1 are connected, the embodiment of the utility model provides an in the projection of first connecting plate 162 on the horizontal plane all is located the projection of second connecting plate 172 on the horizontal plane, if first connecting plate 162 on a prefabricated post 1 staggers each other with second connecting plate 172 on another prefabricated post 1 promptly (staggered distance is less), first connecting plate 162 also can laminate with second connecting plate 172 completely, avoids influencing the welding quality of first connecting plate 162 and second connecting plate 172 because of installation error, reduces the operation degree of difficulty. It should be noted that the first connecting plate 162 and the second connecting plate 172 are connected by full-length welding, and the short steel bars and the steel bars 11 in the two prefabricated columns 1 are connected by double-sided welding, so that the connection is firm.

Further, the embodiment of the utility model provides a prefabricated post subassembly still includes clamp 3, and clamp 3 is used for tying up in the outside of many reinforcing bars 11 or connecting piece to further improve the structural strength of two prefabricated 1 junctions of post. The plurality of tightening parts 3 are bundled at intervals at the end parts of the plurality of reinforcing steel bars 11 outside the first section column 12 or the end parts of the plurality of reinforcing steel bars 11 outside the second section column 13; the tightening piece 3 is a stirrup.

It should be noted that the prefabricated column 1 is generally required to be connected to the girder 100. Therefore, the embodiment of the utility model provides a be equipped with the roof beam between first section post 12 in the prefabricated post 1 and the second section post 13 and reserve mouthful 10, the roof beam body 100 accessible roof beam is reserved mouthful 10 and is worn to locate in the prefabricated post 1. During specific construction, the beam body 100 can be firstly arranged in the precast column 1 through the beam reserved opening 10 in a penetrating manner, then the temporary fixing structure at the joint of the beam body and the precast column is built, concrete is poured at the joint, and the temporary fixing structure is removed after the concrete is solidified and formed. In the construction process, the beam reserved opening 10 facilitates the fixation of the beam body 100 and the pouring operation at the connecting position of the precast column 1 and the beam body 100, the working efficiency is improved, and the working hours are reduced.

Referring to fig. 2, between the beam bodies 100 installed on the two precast columns 1, a column between the two beam bodies 100 is subjected to a large shearing force at 1/2 of the height, and a bending moment between the two beam bodies 100 is small at 3/4 of the distance from the upper beam body 100 in the vertical direction. Therefore, when the precast column 1 according to the embodiment of the present invention is installed, if the first section column 12 is located above the second section column 13, the height of the first section column 12 is 1/4-1/2 of the height of the second section column 13; if the second section of column 13 is located above the first section of column 12, the height of the second section of column 13 is 1/4-1/2 of the height of the first section of column 12, so that the joint of the two prefabricated columns 1 is controlled to be located at 1/5-1/3 of the position between the beam bodies 100 connected on the two prefabricated columns 1.

Referring to fig. 4, an embodiment of the present invention provides a construction method for a precast column assembly according to the above embodiment, including the following steps: the second prefabricated column is placed on the first prefabricated column; the connecting pieces are correspondingly welded with the first steel bars in the first prefabricated column and the second steel bars in the second prefabricated column respectively; and pouring the joint of the first prefabricated column and the second prefabricated column. Therefore, in the construction process, a plurality of first steel bars in the first prefabricated column and a plurality of second steel bars in the second prefabricated column do not need to be completely corresponding, the staggered distance between the first steel bars and the second steel bars can be compensated by the length of the connecting piece, and the first steel bars and the second steel bars are connected. It is noted that fine stone is cast at the junction of the first prefabricated column and the second prefabricated column.

The first section of post to prefabricated post is equipped with first boss, and is equipped with a plurality of first tight posts of grabbing and first connecting plate on the first boss, and the second section of post is equipped with the second boss, is equipped with the scheme that a plurality of second grabbed tight post and second connecting plate on the second boss, places on first prefabricated post and pours between the junction of first prefabricated post and second prefabricated post at the second prefabricated post, above-mentioned construction method still includes: and welding the second connecting plate of the first prefabricated column and the first connecting plate of the second prefabricated column.

Further, above-mentioned prefabricated post subassembly still includes the tight hoop, correspond between the junction of welding and pouring first prefabricated post and second prefabricated post at a plurality of connecting pieces respectively with many first reinforcing bars in the first prefabricated post, many second reinforcing bars in the prefabricated post of second, the utility model discloses construction method still includes: the plurality of tightening members are respectively fixed and tied up at the outer sides of the plurality of first reinforcing steel bars and the plurality of second reinforcing steel bars.

In addition, prefabricated post still need with being connected of roof beam body, before the prefabricated post of second is placed on first prefabricated post, the utility model discloses construction method still includes: the beam body is arranged between the first section column and the second section column of the first prefabricated column, and a temporary fixing structure is built; and pouring the connecting position between the beam body and the first prefabricated column. And if the building comprises a plurality of prefabricated columns and a plurality of beam bodies, the steps are repeated to finish the assembly.

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 protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. The utility model provides a prefabricated post subassembly, a serial communication port, including prefabricated post and connecting piece, prefabricated post includes reinforcing bar, first section post and the second section post that many intervals set up, many reinforcing bars wear to locate respectively first section post in the second section post, just the both ends of many reinforcing bars are located respectively first section post the end face of second section post is out of, first section post and/or the second section post is equipped with bearing structure, bearing structure is used for supporting adjacent two prefabricated post is in order to give two reinforcing bar in the prefabricated post provides places the space, the connecting piece can respectively with one reinforcing bar in the prefabricated post, adjacent another reinforcing bar in the prefabricated post corresponds the welding.

2. The precast column assembly according to claim 1, wherein the support structure comprises a first boss and a second boss, the first boss and the second boss extend outwards from one end of the first column far away from the second column, the second boss extends outwards from one end of the second column far away from the first column, projections of the first bosses on a horizontal plane are located in a projection of the first column on the horizontal plane, projections of the second bosses on the horizontal plane are located in a projection of the second column on the horizontal plane, and the first boss and the second boss are arranged oppositely.

3. The precast column assembly of claim 2, wherein the first bosses are provided with first connecting structures, the second bosses are provided with second connecting structures corresponding to the first connecting structures, and the first connecting structure of one precast column can be fixedly connected with the second connecting structure of another adjacent precast column.

4. The precast column assembly of claim 3, wherein the first connection structure includes a plurality of first gripping columns, one end of each of which is inserted into the first boss, and a first connection plate, the other end of each of which is connected to the first connection plate, the surface of one side of the first connecting plate far away from the second section column is arranged to exceed the end surface of the first boss, the second connecting structure comprises a plurality of second grabbing columns and a second connecting plate, one ends of the second grabbing columns are inserted into the second bosses, the other ends of the second grabbing columns are connected with the second connecting plate, and one side surface of the second connecting plate, which is far away from the first section column, exceeds the end surface of the second boss, and the first connecting plate of one prefabricated column can be welded with the second connecting plate of another adjacent prefabricated column.

5. The precast column assembly of claim 4 wherein the projections of the first connecting plates on a horizontal plane are each located within the projections of the second connecting plates on a horizontal plane.

6. The precast column assembly of claim 1, further comprising a hoop member for strapping outside of a plurality of the rebars.

7. The precast column assembly of claim 1, wherein a beam allowance is provided between the first and second columns.

8. The precast column assembly of claim 1, wherein the height of the first section column is 1/4 to 1/2 of the height of the second section column.

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