KR101608286B1

KR101608286B1 - Composite Pile with PHC Pile and Steel Beam Pile

Info

Publication number: KR101608286B1
Application number: KR1020150077813A
Authority: KR
Inventors: 박강호; 김준
Original assignee: (주) 동인지테크
Priority date: 2015-06-02
Filing date: 2015-06-02
Publication date: 2016-04-11

Abstract

The present invention relates to an intermediate pile installed between retained wall structures for supporting a strut of a retained wall structure, and more particularly, to an intermediate pile having a composite structure of a lower PHC pile and an upper steel beam, The steel beam is easily separated from the PHC pile by drawing, so that when the foundation is installed in the space between the retaining structures, the PHC pile which is relatively inexpensive is buried in the base, but the expensive steel beam is collected, The present invention relates to a PHC pile-steel beam composite pile having a separable structure by pulling out so as to improve the economical efficiency of the tearing and retention construction.

Description

Composite Pile with PHC Pile and Steel Beam Pile with PHC Pile - Steel Beam Separable by Drawing

In constructing the retaining walls by tearing the ground, horizontally strut is installed between the wall structures facing each other to support the retaining wall structure. Korean Patent Registration No. 10-1491048 discloses an example of a construction method of constructing a earth retaining wall structure by using a strut.

When the strut length is long due to the distance between the wall structures facing each other at the time of constructing the earthworks, the middle piles are installed in the spaces between the retaining wall structures and the struts are provided on both sides of the middle piles, The span of the span is reduced. In Korean Patent No. 10-1491048, such a middle pile is described as a support, and the support is made of an H-shaped steel beam.

After the troughs have been made to the required depth, the foundation is constructed by pouring the concrete in the space between the retaining wall structures so that the bottom of the intermediate pile is buried in the concrete of the foundation and is sacrificed. That is, in the prior art, the expensive H-shaped steel beam forming the intermediate pile is buried in the concrete and sacrificed, thereby increasing the construction cost. Although it is possible to recover even an H-shaped steel beam projected onto the foundation, since the equivalent length has been sacrificed, the value of recycling is lowered, and the work of cutting the protruded part on the foundation with equipment such as a cutter There is a problem in that additional noise is generated in the cutting process as well as occurrence of additional cost and work time due to the additional cost.

Korean Registered Patent No. 10-1491048 (issued on February 10, 2015).

The present invention has been developed in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a pile of a middle pile buried in a concrete of a foundation part to support a strut when the pile construction is performed. The lower part is made of relatively inexpensive PHC pile and the upper part connected with the strut is made of steel beam and has a composite structure that can easily separate the steel beam and PHC pile so that the steel beam can be easily recovered and recycled So as to provide a technology capable of improving the economical efficiency and the workability of the soil tearing and retention construction.

In order to achieve the above object, the present invention provides an intermediate pile installed in a space between retaining wall structures to support horizontally disposed struts to support the retaining wall structure when the earth retaining construction is performed by tearing the ground, The PHC pile includes a lower end PHC pile having an end plate and a hollow at its center and a composite structure in which a steel beam at an upper part is detachably assembled and connected to the lower end of the steel beam. And an insertion portion integrally protruded from the lower surface of the coupling plate and inserted into the hollow of the PHC pile; By inserting the insert into the hollow, the steel beam and the PHC pile are synthesized so that the lateral load and bending moment acting on the steel beam in the horizontal direction are transferred to the PHC pile; A composite intermediate pile is provided, characterized in that when the steel beam is pulled out vertically upward, the insert is pulled out of the hollow and the steel beam is separated from the PHC pile.

In the present invention as described above, a cover member composed of a ring member surrounding the outer surface of the PHC pile, and a plurality of extension cover plates integrally joined to the coupling plate at the upper end and coupled to the ring member at the lower end, The insertion portion of the connector is inserted into the hollow of the PHC pile and the cover portion is wrapped around the upper outer surface of the PHC pile so that the horizontal load and the flexural load acting on the steel beam are transmitted to the PHC pile by the cover portion And the steel beam has an H-shaped cross section with an upper, a lower flange and a web; A bulkhead plate is integrally provided between the upper and lower flanges and the web in both lateral directions of the web at the end of the steel beam; The steel beams may be continuous in the vertical direction by bolts being fastened and bolted to penetrate the partition plate in a state where the upper and lower steel beams are continuously arranged so that the partition plates are closely contacted with each other in the vertical direction.

According to the present invention, in the construction of the intermediate pile to support the strut when the soil is installed by tearing the ground, since the lower part of the intermediate pile buried in the concrete of the foundation is made of the relatively inexpensive PHC pile, It is possible to minimize the cost for the buried member, thereby reducing the cost required for the trowel and the earth retaining construction, thereby improving the economical efficiency of construction.

Particularly, in the present invention, since the upper part coupled with the strut is made of a steel beam, the steel beam and the PHC pile can be easily separated, so that the steel beam can be easily recovered and the steel beam can be recycled accordingly It is possible to improve the economical efficiency and the constructability of the soil tearing and retention construction.

1 is a schematic exploded perspective view of a composite type intermediate pile according to a first embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view along line AA of Fig.
3 is a schematic assembled perspective view of a composite intermediate pile according to the embodiment shown in FIG.
4 is a schematic cross-sectional view along line BB in Fig.
5 is a schematic exploded perspective view of a composite intermediate pile according to a second embodiment of the present invention.
6 is a schematic cross-sectional view along line CC of Fig.
7 is a schematic assembled perspective view of a composite intermediate pile according to the embodiment shown in FIG.
8 is a schematic cross-sectional view along the line DD of Fig.
9 is a schematic exploded perspective view of a composite type intermediate pile according to a third embodiment of the present invention.
Fig. 10 is a schematic lateral side view of the state of Fig. 9; Fig.
11 is a schematic assembled perspective view of a composite intermediate pile according to the embodiment shown in FIG.
12 is a schematic lateral side view of the state of Fig.
13 is an exploded perspective view showing a structure in which a steel beam is vertically extended from a composite intermediate pile of the present invention.
14 is an assembled perspective view showing a structure in which a steel beam is extended in a vertical direction in a composite intermediate pile of the present invention.
Figure 15 is a schematic perspective view of a portion of a composite intermediate pile of the present invention where a steel beam must penetrate a slab of a building.
16 is a schematic perspective view showing a state in which a steel beam penetrates through a slab in a composite intermediate pile of the present invention.
17 is a schematic cross-sectional view along the line EE of Fig.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby.

1 is a schematic exploded perspective view of a PHC pile-steel beam composite type intermediate pile (hereinafter referred to as "composite type intermediate pile") 100 according to a first embodiment of the present invention, A schematic cross-sectional view along line AA of FIG. 1 is shown. FIG. 3 shows a schematic assembled perspective view of a composite intermediate pile 100 according to the embodiment shown in FIG. 1, and FIG. 4 shows a schematic cross-sectional view along line B-B of FIG.

The composite type pile 100 according to the present invention is a structure installed in a space between retaining wall structures in order to support a strut disposed horizontally in order to support the retaining wall structure when the retaining construction is performed by turfing the ground, As shown in Figs. 1 to 4, the lower PHC pile 1 and the upper steel beam 2 have a composite structure in which they are joined by a connector 3. The lower PHC pile 1 (Pretensioned spun high strength concrete pile) is a part embedded in the concrete of the base part formed in the space between the earth retaining wall structures. The PHC pile 1 itself is already known and has an end plate 10 made of a steel material at the top and a hollow 11 formed at the center.

In the present invention, the upper steel beam 2 is coupled and installed above the lower PHC pile 1 so that it can be easily separated by drawing. As the steel beam 2, it is preferable to use a beam having an H-shaped cross section having upper and lower flanges and a web, as illustrated in the figure. However, the steel beam 2 is not limited thereto.

In the present invention, in order to allow the steel beam 2 to be easily separated from the PHC pile 1 by pulling, the connecting beam 3 is integrally provided at the lower end of the steel beam 2, The PHC pile 1 and the steel beam 2 are combined.

1 to 4, the connector 3 includes a coupling plate 31 coupled to the lower end of the steel beam 2, and a coupling plate 31 integrally projecting from the lower surface of the coupling plate 31 And an insertion portion 32 which is provided in the hollow 11 of the PHC pile 1. The coupling plate 31 is a member made of a steel plate and is integrally joined to the lower end of the steel beam 2 by welding or the like. In the drawing, reference numeral 8 denotes a weld line 8. The insertion portion 32 is integrally joined to the lower surface of the coupling plate 31 and protrudes downwardly downward and is inserted into the hollow 11 of the PHC pile 1. [ In the embodiment shown in the drawing, the insertion portion 32 is formed of a tubular member having a circular cross section and having an outer diameter corresponding to the inner diameter of the hollow 11, and is inserted into the hollow 11.

In the present invention, the PHC pile 1 and the steel beam 2 are integrally combined by the coupling 3 as described above. In this case, the coupling 3 and the steel beam 2 are completely integrated, 3 and the PHC pile 1 are connected and joined by inserting the insertion portion 32 of the connector 3 into the hollow 11. The horizontal load and the bending moment in the horizontal direction which act on the steel beam 2 are absorbed by the coupling between the insertion portion 32 and the hollow 11 in a state where the insertion portion 32 is inserted into the hollow 11, To the PHC pile (1). However, when an upward pulling force acts on the steel beam 2, the insertion portion 32 is pulled out of the hollow 11, so that the steel beam 2 is easily separated from the PHC pile 1. [

Therefore, after the trench is formed at the required depth, the base portion is constructed by pouring the concrete in a space between the retained wall structures so that only the steel beam 2 and the connecting hole 3 are upwardly pulled So that it can be easily removed. That is, according to the present invention, only PHC piles 1 of low cost are buried in the foundation and are sacrificed, and the expensive steel beam 2 can be easily recovered and recycled. As described above, according to the present invention, an expensive steel beam can be easily recovered and recycled, and thus the economical efficiency and workability of the soil tearing and retention work can be improved as compared with the prior art. Particularly, in the present invention, the steel beam 2 can be easily separated and recovered from the PHC pile 1 without causing any damage to the steel beam 2, simply by pulling the steel beam 2 upward. Therefore, the recovery operation of the steel beam 2 can be carried out very easily and promptly, and the efficiency of the work can be improved, thereby reducing the construction cost and the construction time.

The connector 3 and the PHC pile 1 may be connected to each other in order to prevent the steel beam 2 from being pulled out of the PHC pile 1 due to the unintentional pulling force acting on the composite intermediate pile 100 in common. It may be assembled by the fastening member 5. 1 to 4, a through hole 12 is formed in the PHC pile 1 in the lateral direction and a coupling hole 35 is formed at a position corresponding to the insertion portion 32 of the coupling hole 3 And the fastening member 5 is inserted into the through hole 12 and the fastening hole 35 sequentially in a state in which the insertion portion 32 is inserted into the hollow 11 so that the composite intermediate pile 100 It is possible to effectively prevent the steel beam 2 from being pulled out of the PHC pile 1 even if an unintentional pulling force acts on the joint between the PHC pile 1 and the PHC pile 1. [ Even in such a configuration, when the fastening member 5 is removed from the through hole 12 and the engaging hole 35, the steel beam 2 can be easily separated from the PHC pile 1. As the fastening member 5, a bolt member may be used. However, in the present invention, the coupling structure between the connector 3 and the PHC pile 1 by the fastening member 5 is not essential and can be adopted only when necessary. The through-fastening structure of the fastening member 5 may be provided at a plurality of positions along the circumference of the composite type intermediate pile 100.

5 to 8 show a composite intermediate pile 100 according to a second embodiment of the present invention. FIG. 5 is a schematic exploded perspective view of a composite intermediate pile 100 according to a second embodiment of the present invention. And FIG. 6 is a schematic cross-sectional view along the line CC in FIG. And FIG. 7 is a schematic assembly perspective view of a composite intermediate pile 100 according to the embodiment shown in FIG. 5, and FIG. 8 is a schematic cross-sectional view along line D-D of FIG.

In the second embodiment shown in FIGS. 5 to 8, the insertion portion 32 of the connector 3 has a relatively short length as compared with the first embodiment shown in FIGS. 1 to 4. FIG. Other configurations are the same. When the depth of the inserted portion 32 is relatively short and the depth of the insertion portion 32 inserted into the hollow 11 is smaller than that of the first embodiment, the horizontal load and the flexural load acting on the steel beam 2 are smooth And may not be transferred to the PHC pile 1. If this is a concern, the edge of the coupling plate 31 of the connector 3 can be temporarily integrated by welding with the end plate 10 provided at the upper end of the PHC pile 1. When the steel beam 2 is recovered, only the operation of cutting the welding portion of the coupling plate 31 and the end plate 10 is further performed. As in the first embodiment, by drawing the steel beam 2, (2) can be easily separated from the PHC pile (1) and recovered.

9 to 12 show a composite intermediate pile 100 according to a third embodiment of the present invention. FIG. 9 is a schematic exploded view of a composite intermediate pile 100 according to a third embodiment of the present invention. 10 is a schematic lateral side view of the state of Fig. 9. Fig. FIG. 11 is a schematic assembled perspective view of a composite intermediate pile 100 according to the embodiment shown in FIG. 9, and FIG. 12 is a schematic lateral side view of the state of FIG.

9 to 12, in the present invention, the connector 3 may further include a cover portion 33 surrounding the upper outer surface of the PHC pile 1. [ Specifically, the cover portion 33 is formed in the shape of a cylinder so as to be covered by the top of the PHC pile 1. The upper end of the cover portion 33 is engaged with the engaging plate 31. In the embodiment shown in the drawings, the cover portion 33 is composed of a ring member 331 surrounding the outer surface of the PHC pile 1, an upper portion integrally joined to the engaging plate 31 and a lower end joined to the ring member 331 And a plurality of extension cover plates 332 which extend as far as possible. The extension cover plates 332 are spaced apart in the outer circumferential direction of the PHC pile 1, and thus are open between the extension cover plates 332. With this configuration, the insertion portion 32 of the connector 3 is inserted into the hollow 11 of the PHC pile 1, and the cover portion 33 is covered by the upper end of the PHC pile 1, Since the horizontal load and the flexural load acting on the steel beam 2 are transmitted to the PHC pile 1 also by the cover portion 33, the load transmission between the steel beam 2 and the PHC pile 1 can be made more efficiently . Particularly, when the extended lid plates 332 are spaced apart from each other in the outer peripheral direction of the PHC pile 1 and open between the extended lid plates 332, a member for covering the outer surface of the PHC pile 1 The above-described sufficient load transferring effect can be achieved while minimizing the cost, so that it is possible to reduce the manufacturing cost of the member. 9 to 12, a through hole 12 is formed in the PHC pile 1 in the transverse direction and the through hole 12 is formed in the PHC pile 1 in the same manner as in the first embodiment of Figs. A coupling hole 35 is formed at a position corresponding to the extension cover plate 332 or the ring member 331 so that the cover member 33 covers the upper end surface of the PHC pile 1, Of the PHC pile 1 can be prevented by the steel beam 2 being inserted into the through hole 12 and the engaging hole 35 in succession even if an unintended pullout force acts on the composite intermediate pile 100, Can be effectively prevented from being removed. Of course, in the embodiment shown in Figs. 9 to 12, the additional coupling structure using the fastening member 5 can be selectively applied as needed.

Next, in the composite type intermediate pile 100 of the present invention having the composite structure of the PHC pile 1 and the steel beam 2 as described above, the steel beam 2 must extend in the vertical direction and pass through the slab of the building A steel beam extension structure that can be usefully applied to a steel beam is described.

13 and 14 show an exploded perspective view (FIG. 13) and an assembled perspective view (FIG. 14) showing a structure in which the steel beam 2 extends in the vertical direction from the composite type intermediate pile 100 of the present invention. As shown in the figure, the steel beam 2 can have an H-shaped cross section with upper and lower flanges and webs, in this case lateral to both sides of the web at the end of the steel beam 2, The upper and lower steel beams 2 are continuously arranged so that the barrier rib plates 28 are brought into close contact with each other in the vertical direction and the lower direction, The steel beams 2 can be continuous in the vertical direction by bolting the bolts 25 to weld them to each other or to penetrate the partition plate 28. [

On the other hand, when the composite intermediate pile 100 of the present invention is installed in the trench, the steel beam 2 may have to extend vertically upward through the slab of the building. In this case, it is advantageous to use the structure shown in Figs. 15 to 17. 15 shows a schematic perspective view of a portion of a composite intermediate pile 100 according to the present invention in which a steel beam 2 has to pass through a slab of a building. FIG. 16 shows a composite intermediate pile 100 , A schematic perspective view showing a state in which the steel beam 2 passes through the slab 200 is shown in FIG. 16, and FIG. 17 is a schematic cross-sectional view taken along the line EE in FIG.

In the composite intermediate pile 100 of the present invention, as shown in the drawing, in the case where the steel beam 2 has to penetrate through the slab of the building, the steel beam 2 to be continuous on the upper and lower surfaces of the slab 200 And the flat plate 26 is integrally formed at the end of the flat plate 26. Through-holes 260 are formed in the contact flat plate 26, respectively. The upper and lower surfaces of the slab 200 are brought into close contact with the upper and lower surfaces of the slab 200 while the respective steel beams 2 are positioned on the vertical straight line, The penetrating rod 27 penetrates through the penetrating hole 260 formed in the flat plate 26 and the through hole formed in the slab 200 and then the nut member 270 is fastened to both ends of the penetrating rod 27, do. Even if the slab 200 of the building exists, the steel beam 2 of the composite type pile 100 does not directly pass through the slab of the building, (2) can be continuously positioned on a straight line in the vertical direction.

1: PHC pile
2: Steel beam
3: Connector
31:
32:

Claims

An intermediate pile installed in a space between retaining wall structures to support horizontally disposed struts to support the retaining wall structure when the lower flange 101 is tapped by the ground,
A lower PHC pile 1 having an end plate 10 and hollows formed at its center and a composite structure in which an upper steel beam 2 is detachably assembled and joined by a coupling 3,
The PHC pile (1) is provided with a through hole (12) in the lateral direction;
The connector 3 includes an engaging plate 31 integrally coupled to the lower end of the steel beam 2 and a hollow plate 31 integrally projected from the lower surface of the engaging plate 31, 11) inserted into the insertion portion (32);
A coupling hole 35 is formed in the insertion portion 32 of the connector 3 at a position corresponding to the through hole 12 of the PHC pile 1;
The engaging member 5 is inserted into the through hole 12 and the engaging hole 35 sequentially in a state where the insertion portion 32 is inserted into the hollow 11, The steel beam 2 and the PHC pile 1 are synthesized so that lateral loads and bending moments in the direction of the PHC pile 1 are transmitted to the PHC pile 1;
When the steel beam 2 is pulled out vertically upward after the fastening member 5 is removed, the insertion portion 32 is pulled out of the hollow 11 and the steel beam 2 is separated from the PHC pile 1 Having;
The steel beam 2 is divided into upper and lower parts in order to pass the steel beam 2 through the slab 200 of the building and upper and lower parts of the slab 200 Through holes 260 are formed in the close contact plate 26 and through holes 27 formed in the slab 200 to pass through the through holes are formed in the contact plate 27 And a nut member 270 is fastened and coupled to both ends of the through rod 27 after passing through the through hole 260 formed in the upper and lower contact flat plates 26. [ Medium stakes.

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The method according to claim 1,
A ring member 331 surrounding the outer surface of the PHC pile 1 and a plurality of extension cover plates 332 integrally coupled to the coupling plate 31 at the upper end and extending to be coupled to the ring member 331 at the lower end The cover portion (33) is further provided in the connector (3)
The insertion portion 32 of the connector 3 is inserted into the hollow 11 of the PHC pile 1 and the cover portion 33 is wrapped around the upper end surface of the PHC pile 1, And the horizontal load and the flexural load acting on the PHC pile (1) are transmitted to the PHC pile (1) by the cover part (33).

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The method according to claim 1 or 4,
The steel beam (2) has an H-shaped cross section with an upper, a lower flange and a web;
A partition wall plate 28 is integrally provided between the upper and lower flanges and the web in both lateral directions of the web at the end of the steel beam 2;
The bolts 25 are fastened and bolted so as to penetrate the partition plate 28 in a state where the upper and lower steel beams 2 are continuously arranged so that the upper and lower barrier rib plates 28 are in close contact with each other in the vertical direction, And the steel beam (2) is continuous with the steel beam (2).