KR101342134B1 - Excavating equipment for Front edge expanded bulb having internal excavation method used high strength steel pile - Google Patents

Abstract

The present invention can be carried out smoothly by allowing the steel pipe pile to pivot, and by reciprocating the rotary bit for expanding the enlarged bulb up and down the agitation performance is improved, the tip using a high-strength steel pipe that can maximize the end bearing capacity It is to provide an excavation equipment used in the extended mid-drilling method.
According to a preferred embodiment of the present invention, in an excavation equipment having a leader and a top sheave mounted on an upper part of the leader, the upper auger supported by the leader and lifted up and down and the output end rotated at the same time, Located at the lower side and supported by the leader, the output end is rotated and driven at the same time. The lower auger rotates and drives the steel pipe pile mounted at the time of excavation, and is connected to the output end of the upper auger to drill the ground according to the rotation direction. And an auger screw for discharging the excavated soil, an enlarged bit head coupled to the distal end of the auger screw to form an extended cross-sectional area required for enlargement, and a hydraulic jack mounted on the upper auger to move the inner pipe forward and backward. / Swivel and the hydraulic jack / switch by inserting an auger screw at the same time mounted on the upper auger And an inner pipe that rotates and expands the rotary bit for expansion of the enlarged bit head by means of a screw, wherein the enlarged bit head includes an enlarged bit head body having a coupling portion having a polygonal cross section coupled to an auger screw at an upper portion thereof; A fixed bit fixed to the lower part of the bit head body, a pair of rack gears located in the enlarged bit head body and connected to a lower end of the inner pipe, and pinion gears respectively engaged with the pair of rack gears; It is coupled to the pinion gear provides an excavation equipment used in the tip-extended heavy-duty method using a high-strength steel pipe, characterized in that it comprises a pair of expansion rotary bits for sliding rotationally on the outer surface of the expansion bit head.

Description

Excavating equipment for Front edge expanded bulb having internal excavation method used high strength steel pile}

The present invention relates to an excavation equipment used in the hollow drilling method of the steel pipe piles, in particular, can be easily carried out by allowing the steel pipe pile to pivot intrusion, it can reciprocate up and down the rotary bit for expansion when grouting the enlarged bulb The present invention relates to an excavation equipment used in a tip-extended heavy-duty method using a high-strength steel pipe that can improve the agitation performance and maximize the tip bearing capacity through the composite behavior with the steel pipe after forming the bulb.

The pile construction method that is being constructed in Korea can be divided into three types: anti-precision method, purchase method and on-site casting method. Among them, anti-punching method is a method that has been traditionally used as a direct punching method to directly hit a pile. Recently, this method is very limited due to pollution such as noise and vibration generated during pile driving.

In order to solve the problems of noise and vibration generated during the construction of the anti-taking method, the embedding method is used a lot recently. The embedding method is a pre boring method and a middle boring method. There is this. Here, the middle digging method is to insert the excavation rod and the excavation rod formed with the excavation bit and spiral for the hollow part of the base pile, and excavate the ground using the excavation bit protruding from the base pile tip It is a sedimentation method.

Background art of the present invention is Korean Laid-Open Patent Publication No. 10-2011-0103787. This excavation rod is inserted into the hollow portion of the pile and the excavating rod is forwardly rotated while the excavating bit provided at the end of the excavating rod is protruded from the tip of the main pile to excavate the ground, ≪ / RTI > Rotating the excavation rod to excavate the support layer with the excavation bit to form a preliminary bulb; Protruding an enlarged bit out of the excavating rod, and continuously rotating the excavating rod to form an enlarged bulb by expanding and digging a part or all of the preliminary bulbs with the enlarged bit; And injecting bulb enlargement into the pre- and enlarged bulbs formed in the support layer and inserting the main pile into the enlarged bulb, and excavating the ground by using the main pile as a casing. When excavating the enlarged bulbs formed at the tip of the pile, the excavation rod is rotated in the same way as the excavation of the ground so that the soil can be released. have.

However, the background art adopts a method in which the main pile is settled down as it is when the excavation bit is excavated. In this case, the pile has a disadvantage that the pile is not settled smoothly due to the resistance of the excavated soil.

In addition, there is a limitation in obtaining a good magnification bulb because there is no agitation process of the grout in the magnification bulb.

Korea Patent Registration No. 10-0833901 (Registration Date 2008.05.26) Korea Patent Registration No. 0171394 (Registration Date 1998.10.20)

The present invention can be carried out smoothly by allowing the steel pipe pile to pivot, and by reciprocating the rotary bit for expanding the enlarged bulb up and down the agitation performance is improved, the tip using a high-strength steel pipe that can maximize the end bearing capacity Its purpose is to provide excavation equipment used in the extended mid-drilling method.

According to a preferred embodiment of the present invention,

An excavation equipment having a leader and a top sheave mounted on top of the leader, comprising: an upper auger supported by the leader and being guided up and down, and at the same time an output end is driven to rotate, and positioned below the upper auger and supported by the leader At the same time, the output stage is rotated and driven up and down, and the lower auger rotates and drives the mounted steel pipe pile during excavation, and is connected to the output end of the upper auger to drill the ground according to the rotation direction and to discharge the excavated soil. An auger screw, an enlarged bit head coupled to the distal end of the auger screw to form an enlarged cross-sectional area required for enlargement bulbs, a hydraulic jack / swivel mounted on the upper auger to move the inner pipe forward and backward, and mounted to the upper auger At the same time, the enlarged bit head is enlarged by the hydraulic jack / swivel by inserting an auger screw. And an inner pipe for rotating and rotating the rotating bit, wherein the enlarged bit head includes: an enlarged bit head body having a coupling part of a polygonal cross section coupled to an auger screw on the top thereof, and a fixed bit fixed to a lower portion of the enlarged bit head body; And a pair of rack gears located in the enlarged bit head body and connected to the lower end of the inner pipe, pinion gears respectively engaged with the pair of rack gears, and coupled to the pinion gears of the enlarged bit head. It provides an excavation equipment used in the tip-extended heavy-duty method using a high-strength steel pipe, characterized in that it comprises a pair of expansion rotation bits for sliding rotationally on the outer surface.

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

In addition, the lower end of the inner pipe is characterized in that the gear support shaft for supporting the rotation of the pinion gear is inserted.

In addition, the pair of enlargement rotation bit is characterized in that the rotational direction thereof is installed at right angles to the arrangement direction of the fixed bit.

In addition, a spiral blade is further fixed to the outer circumferential surface of the enlarged bit head body.

Excavation equipment used in the tip-expanded middle digging method using the high-strength steel pipe according to the present invention, the penetration bit head is easy to penetrate without receiving the resistance of the soil excavated by the expansion bit head due to the rotational penetration of the steel pipe pile. In addition, the grind is performed while reciprocating the rotating rotary bit up and down after the tip enlargement excavation is improved, the stirring performance is improved.

In addition, it is possible to realize high design bearing capacity through the use of high-strength steel pipe and expansion of tip (1.7 times area), and it is not necessary to separate casing for collapsing wall when applied to the internal drilling method (medium digging method) inside the steel pipe. Downtown construction is possible.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
1a and 1b is a front view and one side view of the excavation equipment according to the present invention.
FIG. 2A is an enlarged view illustrating main parts of FIG. 1A and illustrates an enlarged rotation bit. FIG.
Figure 2b is an enlarged view of the main portion of Figure 1a is a state in which the rotating rotation bit is folded.
3 is a main configuration diagram of an enlarged bit head applied to the present invention.
Figures 4a to 4d is a view showing the construction sequence of the middle digging method of the steel pipe pile using the excavation equipment of the present invention.
5 and 6 are diagrams schematically showing the order of the enlarged bulb construction.
Figure 7 is a construction process diagram of the hollow hole method of the steel pipe pile according to the present invention.
8 is a shape diagram of a bulb for showing the dimensional relationship between the bulb and the steel pipe pile constructed in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

Excavation equipment 100 having a leader 12 and a top sheave 14 mounted on top of the leader 12 as shown in FIGS. 1-4A is located below the top sheave 14 on top of the leader 12. Complementary auger 20 is located is installed. The upper auger 20 is supported by the leader 12 to be guided up and down, and at the same time, the output stage 20a is driven to forward and reverse rotation.

The lower auger 30 is located below the upper auger 20. The lower auger 30 is supported by the leader 12 to be guided up and down, and at the same time, the output stage is driven to rotate.

The auger screw 40 is connected to the output end of the upper auger 20. The auger screw 40 perforates the ground in accordance with the rotation direction of the output end of the upper auger 20 and simultaneously excavates the excavated soil. Not only one auger screw 40 is used, but the number is increased according to the excavation depth (rock bed reach depth) is connected to each other.

The lower auger 30 is equipped with a steel pipe pile 50. Steel pipe pile 50 may be used a high strength steel pipe. Steel pipe pile 50 is accommodated in the auger screw 40 therein to be driven to rotate in one direction to facilitate penetration during excavation. The inner diameter of the steel pipe pile 50 is selected to be larger than the outer diameter of the auger screw 40. At this time, the steel pipe pile 50 and the August screw 40 is located on the same central axis.

An enlarged bit head 60 is connected to the distal end of the auger screw 40. The enlarged bit head 60 is for carrying out excavation and expanding the cross-sectional area required for the enlarged bulb.

The enlarged bit head 60 has an enlarged bit head body 62 having an engaging portion 62a of a polygonal cross section coupled to the auger screw 40 at the top, as shown in FIGS. 2 and 3, and an enlarged bit head body 62. And a pair of rack gears 66a and 66b fixed in the lower portion of the head), a pair of rack gears 66a and 66b positioned in the enlarged bit head body 62 and connected to the lower end of the inner pipe 80 to be described later. A pair of pinion gears 68a and 68b, which are engaged with gears 66a and 66b, respectively, and a pair of pinion gears 68a and 68b, which are slidably rotatable on the outer surface of the enlarged bit head 60. It has the rotating rotation bits 69a and 69b.

At this time, the distal radius of the fixing bit 64 is configured to be substantially the same as the outer radius of the steel pipe pile 50, and the distal turning radius of the expanding rotary bits (69a, 69b) is larger than the distal turning radius of the fixing bit (64) It is composed. Moreover, the gear support shaft 81 which supports rotation of pinion gear 68a, 68b is inserted in the lower end part of the inner pipe 80. As shown in FIG. In addition, a pair of enlargement rotation bits 69a and 69b are provided so that the rotational direction thereof may be perpendicular to the arrangement direction of the fixed bit 64. In addition, the enlarged bit head 60 preferably has a spiral blade 63 fixed to the outer circumferential surface of the enlarged bit head body 62 in order to have an excavation function.

The upper auger 20 is equipped with a hydraulic jack / swivel 70. An inner pipe 80 is connected to the output terminal of the hydraulic jack / swivel 70. Therefore, the hydraulic jack / swivel 70 moves the inner pipe 80 up and down according to the operating direction of the hydraulic pressure. Accordingly, the pinion gears 68a and 68b meshed with the rack gears 66a and 66b rotate forward and backward due to the forward and backward motion of the inner pipe 80, and the rotational rotation bits 69a and 69b rotate in conjunction with the gear support shafts. 81) Folding or unfolding is performed while turning around.

The inner pipe 80 is mounted to the upper auger 20 via a hydraulic jack / swivel 70. In addition, the inner pipe 80 is connected to the rack gears 66a and 66b of the enlarged bit head 60 through the auger screw 40. At this time, since the inner pipe 80 has a hollow cross section, it is used as a passage for injecting the grout material necessary for the bulb portion.

The method and operation of the excavation equipment configured as described above will be described together with the construction of the enlarged bulbous structure.

On the other hand, the order of the enlarged bulb construction will be described with reference to Figs. 5 and 6, the overall construction order will be described with the numbers (S11 ~ S21) of each step in FIG.

4a and 4c, such as excavation equipment 100, auxiliary crane 200, agitating plant (not shown), steel pipe pile 50, etc. are brought into the site. Then, using the auxiliary crane, the primary end steel pipe pile 50 / auger screw 40 / inner pipe 80 is assembled into a set. At this time, as shown in FIG. 2, the inner pipe 80 is inserted into the hollow of the auger screw 40, and the auger screw 40 is inserted into the hollow of the tip steel pipe pile 50. A set of tip steel pipe pile 50 / auger screw 40 / inner pipe 80 is lifted by the auxiliary crane is mounted to the drilling equipment as shown in Figure 4a.

After mounting the tip pipe pipe pile 50 to the excavation equipment 100 as described above connects the expansion bit head 60 to the lower end of the primary auger screw 40 and the inner pipe 80 (S12).

Then, after checking the verticality of the steel pipe pile with a gauge so that the tip steel pipe pile 50 is embedded, the upper auger 20 is driven to excavate with the enlarged bit head 60 as shown in Figure 4b and at the same time the lower auger 30 Rotating the tip steel pipe pile 50 connected to the (S13). Since the tip steel pipe pile 50 is rotated in this way, penetration can be made very easily without disturbing soil.

Here, the construction may be carried out by injecting air into the grout material injection hole inside the inner pipe 80 for embedding of the remnant soil and the tip steel pipe pile 50 during excavation (S14).

Then, when the first excavation is completed, the primary auger screw 40 and the inner pipe 80 are separated from the excavation equipment 100 (S15), and then a second set of steel pipe piles / augerscrews / inner pipes are identical. Mounted on the excavation equipment by the method. At this time, the lower portion of the secondary auger screw / inner pipe and the upper portion of the primary auger screw 40 / inner pipe 80 are connected to each other (S16), and then joining the tip steel pipe pile 50 and the secondary steel pipe pile ( S17).

Then, by driving the upper auger 20 to proceed with the secondary excavation with the enlarged bit head 60 and at the same time to drive the lower auger 30 to increase the amount of penetration by rotating the primary and secondary steel pipe pile 50. .

Here, after confirming the expansion of the steel pipe piles (S18) until the target depth is reached after the secondary excavation proceeds (S13 ~ S17) is repeated.

Then, when the enlarged bit head 60 reaches the upper end of the enlarged bulb portion of the target depth, the auger screw without stopping the rotation of the steel pipe pile 50 so as not to penetrate the steel pipe pile anymore (not rotating the rotating bit for expansion). Only 40 is rotated to perform preliminary excavation (Fig. 5 (c)) to the lower end of the bulb in the rock bed. Up to this point, the excavation is performed by the fixing bit 64, and the rotating bits 69a and 69b for expansion are folded. That is, the expansion rotary bits (69a, 69b) is excavated in a state standing in parallel with the axial direction.

Then, while expanding the rotation screw (69a, 69b) gradually expanding while rotating the auger screw (40), as shown in Figure 2a when the enlarged rotation bit (69a, 69b) is fully enlarged, the auger screw is repeatedly raised and lowered Preliminary enlarged bulbs are formed in the rock layer while the rotary bits 69a and 69b for expansion are reciprocated up and down several times (Fig. 5 (d)) by the depth (S19). The spreading of the rotating bits 69a and 69b for expansion is performed by the inner pipe 80 descending. At this time, the height of the pre-expansion bulb is preferably to be three times the diameter (D) of the tip steel pipe pile as shown in FIG.

Then, when the preliminary enlarged bulb is formed, while the grout is injected into the preliminary enlarged bulb through the inner pipe 80 (S20), the grout is stirred while repeating the rotating rotary bits 69a and 69b up and down to form an enlarged bulb ( (B) of FIG. Up and down repetition of the rotary bit for expansion improves the stirring performance and efficiency of the grout. Here, in order to prevent mixing of the grout material and the earth and sand, the work of moving the bottom soil to the upper layer by injecting grout while lowering the enlarged bit wing to the bottom of the bulb as shown in FIG. This can be done.

Then, when the enlarged bulb is formed, stop grout injection, fold the enlarged rotary bit (69a, 69b), as shown in Figure 2b, and further indent the tip steel pipe pile located at the tip to a certain depth from the top of the enlarged bulb and then Auger screw Draw (Fig. 6 (C)). The folding operation of the enlarged rotating bits 69a and 69b is performed by the inner pipe 80 lifting up. At this time, the steel pipe pile depth introduced into the enlarged bulb portion is preferably made equal to the diameter (D) of the tip steel pipe pile as shown in FIG.

On the other hand, during the curing of the enlarged bulb, that is, after the extraction of the auger screw, the steel pipe pile support 150 is welded to the uppermost steel pipe pile as shown in FIG. desirable.

In the present embodiment, the tip steel pipe pile was buried while performing excavation from the beginning, but the present invention allows the tip steel pipe pile to be inserted into the service hole 5 drilled to a predetermined depth in the ground as shown in FIG. Construction may proceed after connecting the secondary steel pipe pile to the tip steel pipe pile.

As described above, the enlargement bulb is formed by using the excavation equipment of the present invention, and the air is shortened because the expansion bit head is not easily subjected to the resistance of the excavated soil due to the rotational penetration of the steel pipe pile. In addition, the grind is performed while reciprocating the rotating rotary bit up and down after the tip enlargement excavation is improved, the stirring performance is improved.

In addition, it is possible to realize high design bearing capacity through the use of high-strength steel pipe and expansion of tip (1.7 times of end area), and it is not necessary to separate casing for collapsing wall by applying to internal digging method (medium digging method) inside steel pipe. Downtown construction is possible.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

12: leader
14: top sheave
20: upper auger
30: lower auger
40: Auger screw
50: steel pipe pile
60: Zoom bit head
63: spiral wings
64: fixed bit
66a, 66b: rack gear
68a, 68b: pinion gear
69a, 69b: rotating bits for magnification

Claims (5)

delete In the excavation equipment having a leader 12 and a top sheave 14 mounted on top of the leader 12,
An upper auger 20 supported by the leader 12 and being guided to move up and down, and at the same time the output end is driven to rotate;
The lower auger 30, which is positioned below the upper auger 20 and supported by the leader 12, is guided to move up and down, and at the same time, the output end is rotated and rotated to drive the steel pipe pile 50 mounted at the time of excavation. ;
An auger screw (40) connected to an output end of the upper auger (20) to perforate the ground along the direction of rotation and to dispose of the excavated soil;
An enlarged bit head (60) coupled to the distal end of the auger screw (40) to form an enlarged cross-sectional area necessary for enlargement of the bulb;
A hydraulic jack / swivel 70 mounted on the upper auger 20 to move the inner pipe 80 forward and backward; And
The auger screw 40 is inserted into the upper auger 20 at the same time, and the rotating jacks 69a and 69b of the enlarged bit head 60 are rotated and expanded by the hydraulic jack / swivel 70. Including an inner pipe (80),
The enlarged bit head 60,
An enlarged bit head body 62 having a coupling portion 62a of a polygonal cross section coupled to the auger screw 40 at the top;
A fixed bit 64 fixed to the lower portion of the enlarged bit head body 62;
A pair of rack gears 66a and 66b positioned in the enlarged bit head body 62 and connected to a lower end of the inner pipe 80;
Pinion gears 68a and 68b respectively engaged with the pair of rack gears 66a and 66b; And
A tip using a high strength steel pipe, which is coupled to the pinion gears 68a and 68b, and includes a pair of expansion rotary bits 69a and 69b that are slidably rotatable on an outer surface of the enlarged bit head 60. Excavation equipment used in the extended mid digging process. 3. The method of claim 2,
Excavation equipment used in the tip-extended heavy-duty method using high-strength steel pipe, characterized in that the lower end of the inner pipe (80) is inserted into the gear support shaft (81) for supporting the rotation of the pinion gear (68a, 68b). 3. The method of claim 2,
The pair of expansion rotary bits (69a, 69b) is excavating equipment used in the tip-extended heavy-duty method using a high-strength steel pipe, characterized in that the pivoting direction is installed at right angles to the direction of the fixed bit (64). 3. The method of claim 2,
Excavation equipment used in the tip-extended heavy-duty method using a high-strength steel pipe, characterized in that the spiral blade (63) is further fixed to the outer peripheral surface of the enlarged bit head body (62).

Images