JP3191602U - Steel column structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a precast steel column structure in underground grounding. A steel column structure comprises a housing, a partition plate 200, and a grounding pipe 300. The housing is surrounded by a plurality of steel plates 105 and has a first extending direction. The partition plate 200 has a through hole 202 and a plurality of backfill injection holes 204 formed around the through hole. The partition plate 200 is installed in the housing in the first extending direction at intervals, and the side wall of the partition plate 200 is connected to the housing. The grating pipe 300 is installed in the housing and penetrates the partition plate 200 in the first extending direction. [Selection diagram] FIG. 4B

Description

  The present invention relates to a precast steel column structure in underground grouting.

  As the building technology advances, the construction efficiency is improved at the same time based on meeting the safety regulations, and the effective use of people and goods is enhanced. Taking the top-down construction method as an example, construction can be performed up and down simultaneously from the ground layer, and the working time can be shortened. In the process of filling concrete into the steel pipe, it is only necessary to open a grouting port on one side of the steel pipe and inject the concrete from the grouting port in the construction of the column of the ground layer.

  However, in the above-described conventional technology, space is limited for the column construction of the underground layer, and thus it is necessary to grout with a construction method from top to bottom. In the conventional grouting work in the steel pipe of the underground layer, when concrete is poured into the bottom of the steel pipe, backfilling starts upward, but when the concrete passes through the horizontal partition plate in the steel pipe, the flow rate However, it becomes clear that it becomes easy to generate many air bubbles and voids that are not discharged in the concrete deposited below the horizontal partition plate. This has a negative impact on both horizontal force transmission and overall structural strength. Therefore, it is a problem to be solved at present to more closely fill the steel pipe with concrete in order to enhance the structural strength.

Therefore, the present inventor considered that the above-mentioned drawbacks can be improved, and as a result of intensive studies, the present inventors have come up with a proposal for a steel column structure according to the present invention that improves the problem reasonably and effectively.

The present invention has been made in view of such conventional problems. In order to solve the above problems, the main object of the present invention is to increase the structural strength after grouting.

In order to solve the above-mentioned problems and achieve the purpose, the steel column structure according to the present invention is:
A casing having a plurality of steel plates and having a first extending direction;
There are a through hole and a plurality of backfilling injection holes formed around the through hole, and they are installed in the housing at intervals in the first extending direction, and a side wall is coupled to the housing. At least one partition plate;
The grouting pipe is installed in the housing and penetrates the partition plate in the first extending direction and has a coupling member coupled to one end, and the inner diameter of the coupling member is separated from the coupling location. A steel column structure characterized by being gradually thicker in the direction and being larger than the radius of the grouting pipe.

It is the schematic which shows the assembly of the steel pillar structure by 1st Embodiment of this invention. It is the schematic which shows the assembly of the steel pillar structure by 1st Embodiment of this invention. It is the schematic which shows the assembly of the steel pillar structure by 1st Embodiment of this invention. It is a cross-sectional schematic diagram which shows the steel pillar structure by other embodiment of this invention. It is a cross-sectional schematic diagram which shows the steel pillar structure by other embodiment of this invention. It is the schematic which shows the suspension / mounting and grouting operation | work of the steel pillar structure by 1st Embodiment of this invention. It is the schematic which shows the suspension / mounting and grouting operation | work of the steel pillar structure by 1st Embodiment of this invention.

Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiment described below does not limit the contents of the present invention described in the claims of the utility model registration. In addition, all the configurations described below are not necessarily essential requirements of the present invention.
[First Embodiment]

  Hereinafter, a first embodiment will be described with reference to FIGS. The steel column structure according to the embodiment of the present invention is formed by assembling a plurality of housings, and is used for building construction in which the underground layer is precast. As shown in FIGS. 1 and 2, the steel column structure 100 is combined in segments, and first the first sub-housing 101 is first installed on the side facing the bottom plate 103 so as to face the boundary surface of the second sub-housing 102. To do. Subsequently, in FIG. 2, the second sub housing 102 is brought closer to the first sub housing 101 in the first extending direction a, and the grouting pipe 300 in the second sub housing 102 is moved into the first sub housing 101. Match the grouting pipe 300. As shown in FIG. 2, the grouting pipe 300 includes a coupling member 302 that is coupled to one end of the grouting pipe 300 and is coupled to the grouting pipe 300 in the other sub-housing. That is, the grouting pipe 300 is also combined by the segment method. When the second sub housing 102 approaches the first sub housing 101, the grouting pipe 300 of the second sub housing 102 enters the coupling member 302 of the grouting pipe 300 of the first sub housing 101.

Since the inner diameter of the coupling member 302 is small in the neck structure 304, the advance of the grouting pipe 300 of the second sub-casing 102 is restricted. Therefore, when the grouting pipe 300 of the second sub housing 102 abuts on the neck structure 304 of the coupling member 302, the grouting pipe 300 does not move forward, and the coupling of the grouting pipe 300 in the housing is completed. When the coupling of the grouting pipe 300 between the second sub-case 102 and the first sub-case 101 is completed, the second sub-case 102 also comes into contact with the first sub-case 101, and then the second sub-case 102 A welding operation is performed at the joint location with the first sub-housing 101 to complete the combination of the second sub-housing 102 and the first sub-housing 101 (see FIG. 3).

Further, the coupling member 302 further includes a spacer 306 that is disposed so as to surround the inner surface of the coupling member 302. Specifically, the spacers 306 such as soft rubber are formed so as to surround the inner surface of the coupling member 302 and extend outward from the neck structure 304 and distributed. A gap 308 is left between the spacer 306 and the grouting pipe 300 of the second sub-casing 102, which is a tolerance reserved during assembly. Installing the spacer 306 not only provides a cover effect at the joint of the grouting pipe 300, but also ensures that the spacer 306 formed on the neck structure 304 is injected in the same direction when further concrete is injected. The concrete squeezes out from the joint of the injection pipe 300 in the opposite direction so that the concrete injection effect is not affected.

Incidentally, since the coupling member 302 by the sleeve coupling is completed after the grouting pipe 300 is coupled, the coupling between the sub-casings is completed. Therefore, the grouting pipe 300 in each sub-casing is placed on the partition plate 200 in advance. The grouting pipe 300 does not move to face the sub casing.

The combination work of the steel column structure 100 is performed in a PC factory, and the number and length of the segments of each sub-casing are adjusted according to the size of the building. For example, the second sub casing 102 and the first sub casing 101 are combined, and then the second sub casing 102 is coupled to another sub casing at one end facing the first sub casing 101. When the sub-casings have been combined, the entire housing is finally formed (see FIG. 5).

Further, the partition plate 200 has a through hole 202 and a plurality of backfill injection holes 204 formed around the through hole 202. The through hole 202 provides an activity space when the construction staff performs precast work. The backfill injection hole 204 is a flow space that reversely fills concrete during grouting, and is preferably formed on the partition plate 200 so as to be evenly distributed, so that the concrete is reverse-filled and passes through the partition plate 200. At this time, it is ensured to have preferable fluidity. When the sub-casings have been combined, the through hole 202 is sealed with the backfilling surrounding plate 206. A plurality of backfill injection holes 204 are also formed in the backfill surrounding plate 206, and are installed so as to be evenly distributed in accordance with the above (see FIG. 4A).

The opening ratio of the partition plate 200 (after backfilling the through-hole 202) is 10% or more, that is, the fluidity of the concrete is controlled by the area of the backfill injection hole 204 and 10% or more of the partition plate area. To ensure and reduce the accumulation of bubbles to make the pillars after filling more tight. In addition, the hole size of the backfill injection hole 204 can be adjusted according to needs. Further, the housing further includes a plurality of shear studs 400, which are arranged on the inner surface of the housing at a fixed interval on average, and the shear studs 400 on the inner surface of the housing have a binding force between the housing and the concrete. Further strengthening can increase the overall structural strength.

As in the embodiment of FIG. 4B, the grouting pipe 300 penetrates the partition plate 200 through the adjacent through hole 202. That is, the partition plate 200 can form a hole penetrating the grouting pipe 300 on one side of the partition plate 200 in addition to the through hole 202, and can increase an activity space when the construction staff performs precast work. In addition, since the grouting pipe 300 and the through hole 202 are separate, it is not necessary to reserve a space for avoiding the grouting pipe 300 in the backfilling surrounding plate 206, and the fluidity when the concrete is reversely filled can be improved. it can.

As shown in FIG. 5, the steel column structure 100 is composed of four sub-casings connected by segments, and is transported to the construction site after assembly, suspended, and embedded in the underground layer. After placing the steel column structure 100 on the foundation pile 500, the backfill soil 502 is subsequently filled around the steel column structure 100. Finally, as shown in FIG. 6, a grouting operation is performed, and the pipe 504 is joined at the top of the grouting pipe 300 and then grouting. The concrete is poured from the grouting pipe 300 into the bottom plate 103 in a downward direction. When the space near the bottom plate 103 is filled, the concrete is reverse-filled into the upper space, and the partition plate 200 of each layer is passed through the inside of the casing. Filling the space upwards, the filling of the underground column is completed.

The above-described embodiments are merely for explaining the technical idea and features of the present invention, and are intended to allow those skilled in the art to understand the contents of the present invention and to carry out the present invention. It is not intended to limit the scope of the claims. Accordingly, improvements or modifications having various similar effects without departing from the spirit of the present invention shall be included in the following claims.

100 Steel column structure
101 First housing
102 Second housing
103 Bottom plate 105 Steel plate 200 Partition plate 202 Through hole
204 Backfilling injection hole 206 Backfilling envelope 300 Grouting pipe
302 Connecting member
304 Neck structure 306 Spacer 308 Clearance
400 shear stud
500 Foundation pile 502 Backfill soil 504 Piping a First extending direction

Claims (3)

A casing having a plurality of steel plates and having a first extending direction;
There are a through hole and a plurality of backfilling injection holes formed around the through hole, and they are installed in the housing at intervals in the first extending direction, and a side wall is coupled to the housing. At least one partition plate;
The grouting pipe is installed in the housing and penetrates the partition plate in the first extending direction and has a coupling member coupled to one end, and the inner diameter of the coupling member is separated from the coupling location. A steel column structure characterized by being gradually thicker in the direction and being larger than the radius of the grouting pipe.   The steel column structure according to claim 1, further comprising a plurality of shear studs arranged on the inner surface of the housing at a fixed interval on average.   The steel column structure according to claim 1, further comprising a spacer disposed so as to surround an inner surface of the coupling member.