KR101765061B1

KR101765061B1 - Apparatus for supporting an augered pile

Info

Publication number: KR101765061B1
Application number: KR1020150164201A
Authority: KR
Inventors: 정경자; 남문석; 박영호; 조성민
Original assignee: 한국도로공사
Priority date: 2015-11-23
Filing date: 2015-11-23
Publication date: 2017-08-16
Also published as: KR20170060230A

Abstract

The present invention relates to an embedded pile fixing device, which is detachably coupled to a lower end portion of a buried pile inserted into a drilling hole, and is supported by a bottom surface of the drilling hole, A pile lower surface interval maintaining member for maintaining the interval of the pile lower surface interval maintaining member; And a pile main surface spacing member mounted on the main surface of the embedded pile to maintain a gap between the main surface of the embedded pile and the inner wall of the drilling hole. According to the present invention, the embedded pile is fixed at a predetermined position in the excavation hole while the embedded pile is inserted into the excavation hole into which the fixative is injected.

Description

[0001] APPARATUS FOR SUPPORTING AN AUGERED PILE [0002]

The present invention relates to an embedded pile fixing device.

Generally, the pile is embedded in the ground below the foundation slab of the civil engineering structure or the building to transmit the load of the civil engineering structure or the building such as the bridge to the ground, and strengthens the ground. The types of piles include steel pipe piles, PHC (Pretensioned spun high strength concrete) piles, and composite piles.

In addition, there are pile driving methods such as pile driving, pile driving, and on-site pile driving. In the case of the piling method, construction is simple, but a lot of noise vibration occurs during construction. As a result, construction has been greatly reduced as noise and vibration regulations are implemented. The embedded pile method has been developed to solve the problem of noise and vibration generated during the construction of the pile driving method, and the construction is rapidly increasing due to the regulation of noise and vibration. Soil-cement injected precast pile (SIP) method and SDA (seperated donut auger) method are mainly used for the piercing method.

Fig. 1 shows an example of an S-IP method for performing a final putting order. As shown in Fig. 1, an example of the S-IP method for performing the final putting is as follows. First, the ground is excavated with the auger 10 of the excavator to form the excavation hole H at a set depth (Fig. b). Next, a main surface fixing liquid (also referred to as a cement paste) L1 is injected into the excavation hole H and the auger 10 of the excavator is recovered in the excavation hole H (see FIGS. The pile P is inserted into the excavation hole H into which the main surface fixing liquid L1 is injected (refer to FIG. 1E), and the pile P is finally hit with the hammer 20. In this method, the final depth of the lower end (tip) of the pile P plays an important role in determining the bearing capacity.

Fig. 2 shows an example of the S-IP method without a final screen because the final screen can not be performed. As shown in Fig. 2, an example of the S-IP method without a final touch is to excavate the ground with the auger 10 of the excavator to form the excavation hole H at a predetermined depth (see a and b in Fig. 2) . The tip fixing fluid L2 is introduced into the excavation hole H through the hollow portion provided in the auger 10 of the excavator and the auger 10 is drawn out while the tip fixing fluid L2 is introduced into the excavation hole H, The tip fixing liquid is injected from the bottom to the set height (see Fig. 2c). Subsequently, while the main surface fixing liquid L1 is injected through the hollow portion of the excavator auger 10, the excavator auger 10 is continuously pushed out to inject the fixing liquid L1 up to a set height, and then the excavator auger 10 is inserted into the excavation hole H ) (See Fig. 2 (d)). Then, the pile P is inserted into the excavation hole H, and inserted at a predetermined distance from the bottom of the excavation hole H (see FIGS. 2E and 2F).

Although the S-IP method using the finishing touch is generally used because of its ease of quality control, noise is generated because it is put on the hard layer in order to secure the bearing capacity.

On the other hand, in the SIP method without the final slab, the tip of the pile should be maintained at a distance of 1.5 times the diameter of the pile from the bottom of the hole until the fixing fluid of the tip of the pile is solidified to some extent. And it is difficult to apply it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a buried pile fixing device for fixing a buried pile to a predetermined position in an excavation hole in a state where the buried pile is inserted into the drilled hole.

In order to accomplish the object of the present invention, there is provided a method of manufacturing an excavation pile, which is detachably coupled to a lower end portion of a buried pile inserted into a drilling hole and is supported on a bottom surface of the drilling hole to maintain a gap between a lower end surface of the buried pile and a bottom surface of the excavation hole A gap holding member for piling; And a pile main surface spacing member mounted on a main surface of the embedded pile to maintain a gap between a main surface of the embedded pile and an inner wall of the hole.

The pile lower space retaining member includes an upper retaining ring to which a lower end of the embedded pile is engaged, a lower support ring for supporting a lower surface of the embedded pile, and a lower support ring fixedly coupled to the upper retaining ring And a plurality of vertical support bars and fixing bars connecting the vertical support bars and the lower support rings to fix the lower support rings.

And a bottom support ring connecting the lower ends of the plurality of vertical support bars to each other.

Preferably, the plurality of vertical support bars are coupled with a uniform spacing.

The pile spacing member includes an upper retaining ring to which a lower end of the embedded pile is coupled, a lower support ring for supporting a lower surface of the embedded pile, and a plurality And the curved supporting bars may be formed in a U shape or a V shape so as to have a U shape or a V shape, .

Preferably, the plurality of curved support bars are coupled with a uniform spacing.

It is preferable that the upper retaining ring and the lower surface support ring are respectively circular and the inner diameter of the upper retaining ring is larger than the inner diameter of the lower support ring.

The pile main surface spacing member preferably includes a coupling ring fixed around the main surface of the embedded pile and a plurality of radial supporting bars coupled radially and horizontally to the coupling ring and supported by the inner wall of the excavation groove .

It is preferable that a part of the coupling ring is cut so that the coupling ring has an elastic force.

And an outer supporting ring connected to inner walls of the excavation hole by connecting the ends of the radial supporting bars.

Since the bottom surface of the embedded pile inserted into the excavation hole is maintained at a predetermined interval with the bottom surface of the excavation hole and the interval between the outer circumferential surface of the excavated pile and the inner wall of the excavation hole is uniformly maintained at a predetermined interval, Is fixed uniformly and cured to an appropriate thickness, thereby improving the bearing capacity of the embedded pile and preventing over-excavation of the ground.

In addition, since the buried pile inserted into the excavation hole is maintained at a predetermined position without using any separate equipment, the construction is simple and the construction period is shortened, and the final weaving process is eliminated, thereby preventing noise from being generated.

FIG. 1 is a sectional view sequentially showing an example of an S-IP technique for performing a final putt,
FIG. 2 is a sectional view sequentially showing an example of an S-IP technique without a final touch screen,
3 is a front view showing an embed pile fixing apparatus according to an embodiment of the present invention,
FIG. 4 is a front view showing a first embodiment of a pile lower space holding member constituting an embodiment of a buried pile fixing apparatus according to the present invention;
5 is a plan view showing a first embodiment of a pile lower space holding member constituting an embodiment of a buried pile fixing apparatus according to the present invention,
FIG. 6 is a front view showing a second embodiment of a pile lower space holding member constituting an embodiment of the embedded pile fixing apparatus according to the present invention;
7 is a plan view showing a second embodiment of a pile lower space holding member constituting an embodiment of the embedded pile fixing apparatus according to the present invention,
FIG. 8 is a plan view showing a first embodiment of a pile main-surface-interval holding member constituting an embodiment of a buried pile-fixing apparatus according to the present invention,
FIG. 9 is a front view showing a state where an auxiliary support bar is coupled to a pile main-surface spacing member constituting an embed-pile-fixing apparatus according to an embodiment of the present invention;
10 is a plan view showing a second embodiment of a pile main surface interval holding member constituting an embodiment of a buried pile fixing apparatus according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an embedded pile fixing apparatus according to the present invention will be described with reference to the accompanying drawings.

3 is a front view showing an embodiment of an embedded pile fixing apparatus according to the present invention.

As shown in FIG. 3, the embedding pile fixing apparatus according to an embodiment of the present invention includes a pile lower space holding member 100 and a pile main surface interval holding member 200.

The gap holding member 100 is detachably coupled to the lower end portion of the embedded pile P inserted into the excavation hole H and is supported on the bottom surface of the excavation hole H, And the bottom surface of the excavation hole (H). The excavation hole H is excavated to a length set in the ground in the vertical direction from the ground surface. The embedding pile P is preferably a pile-chased pile. The inner diameter of the excavation hole H is larger than the outer diameter of the embedded pile P by about 10 cm.

As shown in FIGS. 3, 4 and 5, the pit bottom gap holding member 100 is formed of a top retaining ring (not shown) to which a lower end of a buried pile P is coupled, A plurality of vertical support bars 110 fixedly coupled to the upper retaining ring 110 so as to be positioned below the upper retaining ring 110, a lower support ring 120 supporting the lower surface of the embedded pile P, And fixing bars 140 that connect the vertical support bars 130 and the lower support rings 120 and fix the lower support rings 120. The cross-sectional shape of the embedded pile P is preferably circular. The cross-sectional shape of the embedded pile P may be various shapes such as a hexagon and a square. Hereinafter, the case where the embedded pile P is circular will be described. The upper retaining ring 110 is formed to have the same shape as the transverse sectional shape of the embedded pile P so that the upper retaining ring 110 can be fixed to the lower end of the embedded pile P in a state where the lower end of the embedded pile P is inserted. Or may be made smaller than the outer diameter of the embedded pile P and a portion of the upper retaining ring 110 may be cut. The upper retaining ring 110 is formed in a circular shape. The support ring 120 is positioned horizontally and is preferably formed in a circular shape. The support ring 120 may be formed of a square, a triangle, or the like so as to support the lower surface of the embedded pile P. The supporting ring 120 is smaller than the transverse sectional size of the buried pile P and the outer diameter of the supporting ring 120 is smaller than the outer diameter of the upper holding ring 110 when the supporting ring 120 is circular . It is preferred that the vertical support bars 130 are coupled under the upper retaining ring 110 and coupled in the vertical direction. The vertical support bar 130 may be coupled to the side of the upper retaining ring 110. The vertical support bars 130 are preferably connected to the upper stationary ring 110 by welding. The plurality of vertical support bars 130 preferably have the same length and are preferably coupled to the upper stationary ring 110 at a uniform interval. The vertical support bars 130 are supported on the bottom surface of the excavation hole H. The fixing bars 140 are preferably spaced apart from each other.

In addition, a bottom support ring 150 may be further provided for connecting lower ends of the plurality of vertical support bars 130 to each other. The bottom support ring 150 is supported on the bottom surface of the excavation hole H when the bottom support ring 150 is provided at the lower end of the vertical support bars 130. [ When the bottom support ring 150 is supported on the bottom surface of the excavation hole H, the area supported by the bottom surface of the excavation hole H is increased so that the bottom support ring 150 is supported on the bottom surface of the excavation hole H Digging is minimized.

As shown in FIGS. 6 and 7, the gap holding member 100 includes a lower holding ring 110 to which a lower end of a buried pile P is coupled, And a plurality of curved supporting bars 160 fixedly coupled to the upper retaining ring 110 to be positioned below the upper retaining ring 110. The lower supporting ring 120 supports the lower surface of the embedded pile P, And a fixing bar 140 connecting the curved supporting bars 160 and the lower supporting ring 120 and fixing the lower supporting ring 120. The curved supporting bar 160 is fixed to the upper surface of the curved supporting bar 160, (V) shape. The upper retaining ring 110 and the lower retaining ring 120 are the same as those of the upper retaining ring 110 and the lower retaining ring 120 of the first embodiment, and a detailed description thereof will be omitted. Preferably, the plurality of curved support bars 160 are coupled to the upper stationary ring 110 with a uniform spacing from each other. A plurality of curved supporting bars 160 may be formed as one piece. It is preferable that the fixing bars 140 are arranged at uniform intervals.

Preferably, the gap holding member 100 is made of reinforcing steel.

The lower end of the embedded pile P is inserted into the upper retaining ring 110 of the gap maintaining member 100 and the lower surface of the embedded pile P is contacted and supported by the lower support ring 120.

The pile main surface interval holding member 200 is mounted on the main surface of the embedded pile P to maintain a gap between the main surface of the embedded pile P and the inner wall of the hole H. [ As shown in FIG. 8, the pile main-surface spacing member 200 includes a coupling ring 210 which is fixed around the main surface of the embedded pile P, And a plurality of radial support bars 220 radially and horizontally coupled to the coupling ring 210 and supported on the inner wall of the drilling hole H. [ The coupling ring 210 is formed of a ring having the same shape as the outer shape of the embedded pile P and a portion of the coupling ring 210 is preferably cut so that the coupling ring 210 has an elastic force. The inner diameter of the coupling ring 210 is preferably slightly smaller than the outer diameter of the embedded pile P. On the other hand, the inner diameter of the coupling ring 210 may be the same as the outer diameter of the embedded pile P. The radial support bars 220 are preferably positioned horizontally and preferably have a uniform spacing. Further, the lengths of the radial support bars 220 are equal to each other. At each end of the radial support bars 220, an auxiliary support bar 230 may be provided as shown in FIG. 9 to widen the inner wall of the excavation hole H and the support area. The auxiliary support bar 230 is coupled to the end of the horizontal support bar 220 to be vertically positioned.

As shown in FIG. 10, the pile main-surface-interval-retaining member 200 of the pile-main-surface-interval-retaining member 200 has a structure in which, in the configuration of the first embodiment of the pile- And an outer support ring 240 connected to each end of the bars 220 and supported by the inner wall of the excavation hole H. The outer support ring 240 is formed in a circular shape and the outer support ring 240 is formed in a shape corresponding to the shape of the excavation hole H. Since the excavation hole H is formed in a circular shape, Has a size corresponding to the inner diameter of the excavation hole (H). The outer support ring 240 is preferably cut at a portion of the outer support ring 240 so as to have an elastic force. The outer support ring 240 and the coupling ring 210 are preferably located on the same horizontal plane.

It is preferable that the pile main surface interval holding member 200 is made of a reinforcing bar.

The buried pile P is inserted into the coupling ring 210 of the pile main surface interval holding member 200 and the radial support bars 220 are radially positioned on the outer peripheral surface of the buried pile P. [ When the coupling ring 210 is coupled to the embedded pile P, the coupling ring 210 is slightly opened and inserted. When the coupling ring 210 is released, the coupling ring 210 is pressed and fixed around the outer peripheral surface of the embedded pile P.

Hereinafter, the operation and effects of the embedded pile fixing apparatus according to the present invention will be described.

When the pile is pegged to the lower end of the embedded pile P, the spacing member 100 is coupled and the pile main surface spacing member 200 is coupled to the embedded pile P at a predetermined interval. The excavation hole H is constructed by digging the ground in a direction perpendicular to the ground to a predetermined depth. The fixing liquid is injected into the excavation hole H and the pile P having the pile main surface spacing members 200 is inserted into the excavation hole H when the pile is pegged. Meanwhile, if the pile is pierced in the excavation hole H, the piercing pile P provided with the spacing member 100 and the pile main-surface spacing member 200 may be inserted and the fixer may be injected. The fixing liquid is injected into the excavation hole (H) first, and then the fixing liquid is injected into the excavation hole (H). The gap holding member 100 includes the vertical support bars 130 so that the fixation fluid flows smoothly into the space between the bottom surface of the embedded pile P and the bottom surface of the excavation hole H, And the pile main surface interval holding member 200 includes the radial supporting bars 220 so that the flow of the fixing liquid between the outer peripheral surface of the embedded pile P and the inner wall of the excavation hole H is smooth, The fixing liquid is densely filled between the outer circumferential surface of the punch P and the inner wall of the excavation hole H. When the peg P is provided in the excavation hole H and the peg P having the peg main pegging member 200 is inserted into the peg H, The bottom supporting pillars P and the vertical supporting bars are supported on the bottom surface of the excavation hole H and the bottom surface of the embedding pile P is supported on the bottom supporting ring 120, And the bottom surface of the excavation hole H are maintained at a constant interval. The radial supporting bars of the pile main surface spacing members 200 coupled to the outer circumferential surface of the embedded pile P are also supported on the inner wall of the excavation hole H so that the embedded pile P And the gap between the outer circumferential surface of the buried pile P and the inner wall of the excavation hole H is maintained to be constant.

As described above, according to the present invention, the lower surface of the embedded pile P inserted into the excavation hole H is maintained at a predetermined interval from the bottom surface of the excavation hole H, and the outer circumferential surface of the excavated pile P and the Since the inner wall spacing is uniformly maintained at a predetermined interval, the fixation liquid located between the outer circumferential surface of the embedded pile P and the inner wall of the excavation hole H is uniform and hardened to an appropriate thickness to improve the bearing capacity of the embedded pile P Thereby preventing excessive excavation of the ground.

Further, since the embedding pile P inserted in the excavation hole H is maintained at a predetermined position without using any additional equipment, the present invention can simplify construction and shorten the construction period, .

100; A pile support member 200; The pile-
P; Filled piles H; Drilling hole

Claims

A pile bottom spacing member detachably coupled to a lower end of a buried pile inserted into a drilling hole and supported on a bottom surface of the drilling hole to maintain a gap between a bottom surface of the buried pile and a bottom surface of the drilling hole;
And a pile main surface spacing member mounted on a main surface of the buried pile to maintain a distance between a main surface of the buried pile and an inner wall of the drilling hole ,
The pile lower space retaining member includes an upper retaining ring into which the lower end of the embedded pile is inserted and coupled, a lower support ring positioned below the upper retaining ring to support the lower surface of the embedded pile, A plurality of vertical support bars fixedly coupled to the upper retaining ring so as to be positioned on the lower support ring, and fixing bars connecting the vertical support bars and the lower support ring to fix the lower support ring, The lower support ring is each circular, the inner diameter of the upper retaining ring is larger than the inner diameter of the lower support ring,
Wherein the pile main-surface spacing member comprises: a coupling ring fixed around the main surface of the embedded pile; a plurality of radial support bars coupled radially and horizontally to the coupling ring; And an outer support ring supported on an inner wall of the excavation hole, wherein the engagement ring and the outer support ring are partially cut to have an elastic force.

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The embedded pile fixing device according to claim 1, further comprising a bottom support ring connecting the lower ends of the plurality of vertical support bars to each other.

The embedding pile fixing device according to claim 1, wherein the plurality of vertical supporting bars are coupled with a uniform spacing.

2. The embedded pile fixing device according to claim 1, wherein the vertical supporting bar of the pile bottom space holding member is a curved supporting bar formed in the shape of a U-shaped or V-shaped.

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