JP2000154538A - Plumb bob type device for driving steel pipe in inner moat and plumb bob type construction method of driving steel pipe in inner moat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress binding of a crane ship to the minimum extent and enable pile driving construction work by means of a plurality of plumb bob type devices for driving a pile in an inner moat by one crane ship. SOLUTION: This device is provided with a hollow hydraulic hammer 5 loaded in a head part of a steel pipe pile P, a flying leader 2 attached integrally around a pile driving device in a condition in which a shock from the hollow hydraulic hammer 5 can be absorbed, a muck discharge pipe 6 which is inserted in the inside of the steel pipe pile P and is constituted so as to expand and shrink freely in the longitudinal direction of a pipe, a plumb bob for inner excavation 7 which has a shaft passing through hole part in the center and is arranged in a lower end part of muck discharge pipe 6 in a condition in which the muck discharge pipe 6 passes through it, and equipment installation pedestals 3, 4 provided integrally for the flying leader 2. It consists of a power unit arranged on the equipment installation pedestals 3, 4 and one set of facility equipment which operate at least the hollow hydraulic hammer 5 such as a winch, various sheaves, etc., and the plumb bob for an inner moat 7 and expand and shrink the muck discharge pipe 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite ground comprising a formation such as a sand layer, a silt, and a clay layer and a formation layer such as a boulder layer, a boulder layer and a bedrock layer. The present invention relates to a weight-type steel-pipe digging apparatus for continuously penetrating steel pipe piles into the composite ground, and a weight-type steel-pipe digging method using the same.

[0002]

2. Description of the Related Art Conventionally, in order to penetrate a steel pipe pile to a supporting layer such as a bedrock or a gravel layer, first, a pile of piles such as a silt and a cohesive soil on the upper layer side is piled with a vibro hammer or a diesel pile hammer. While penetrating to the head just before the supporting ground consisting of rock or gravel layer while applying vibration or impact to the head, and then excavating to the specified depth of penetration with a rotary drilling machine, the steel pipe pile is again pierced with a vibro hammer or diesel pile hammer. The steel pipe pile was driven according to the procedure for penetration.

[0003] However, in this method, the pile intrusion step is substantially three steps, and different construction machines are required for each step. However, there is a problem that the construction cost is increased due to the wide variety, and the construction period is prolonged.

[0004] It has been proposed to solve this problem at once by using a weight-type steel pipe excavation method. Examples of this method include, for example, Japanese Patent Publication No. 60-39.
809 and JP-B-2-15694.

[0005] At the beginning of the development of this method, construction was carried out exclusively for the penetration of steel pipe piles on the land. The leader of a three-point pile driver was provided with a weight for medium digging, a chip discharge pipe for excavating waste, and a steel pipe. Equipped with hydraulic hammer for pile hitting,
The large-diameter steel pipe pile was made to penetrate directly into the bedrock while performing the inside digging and driving in parallel.

After that, a method of hanging with a heavy-duty steel pipe was also developed to meet the demand for offshore construction. More specifically, as shown in FIG. 13, it is adopted to build a jacket-type pier for building a large-scale foundation structure in the strait, and replaces a leader of a three-point pile driver. A hollow hydraulic hammer 51 is incorporated into a frame 50 (hereinafter, referred to as a flying leader) in the form of a frame, and a slip discharge pipe 52 is fixedly disposed at the center of the frame 50 in a longitudinal direction in a longitudinal direction. In the state where the slip discharge pipe 52 penetrates the portion,
3 is a device which is suspended by a wire 54 in order to pull up / drop the weight 53 for digging.

When driving the steel pipe pile P, the weight-type digging and hanging device 49 is lifted by the hoisting ship 56 and the weight mounted on the hoisting ship 56 for raising the digging weight 53. After winding the wire 54 around the hydraulic winch for weight (not shown),
A hiring pile (yatco) 55 connected to the lower end side of the hydraulic hammer 51 penetrates into the head of the steel pipe pile P supported upright on the ground, and the weight-lifting boring device 49 is driven by the hoisting ship 56. While holding in a suspended state, the weight of the middle digging weight 53 is pulled up inside the steel pipe pile P, and the rock rock at the tip of the steel pipe pile is hit and crushed by repeating free fall. The steel pipe pile P is made to penetrate to the final depth by giving an impact. Note that the debris crushed by the digging weight 53 is discharged out of the system through the debris discharge pipe 52.

[0008]

However, in the case of the above-mentioned suspension method using the weight-type steel pipe digging, the flying leader 50 is continuously suspended by the hoist ship 56 from the start to the end of the driving of the steel pipe pile P. Must be 1
There is a problem that one hoist ship 56 has to be attached to and disposed on one of the weight-type underground suspension devices 49. That is, in general, a pile driving operation is performed in parallel by a plurality of weight type digging and hanging devices 49 in order to improve the efficiency of the operation.
The number of large hoist ships 56 must be prepared,
There have been problems such as an increase in the penalty fee of the hoist ship 56 and an enormous construction cost.

Further, since the wire operation for lifting and dropping the digging weight 53 is performed by the hydraulic winch for the weight installed on the hoist ship 56,
The extension of the wire becomes long, and it becomes difficult to operate the two wires 54, 54 that lift the weight for boring 53 evenly in synchronization, and excessive tension acts on one of the wires 54, There has also been a problem that the wire life is extremely shortened due to the twist of the wire 54 or the like.

Therefore, a main object of the present invention is to minimize the restraint of a hoist ship, and to make it possible to perform construction by a plurality of weight-type digging pile driving devices with one hoist ship, thereby improving work efficiency and reducing construction costs. Another object of the present invention is to shorten the operation extension of the wire for operating the weight for boring, to make the wire tension uniform, and to reduce the labor of wire replacement which has conventionally occurred frequently.

[0011]

A first weight-type steel pipe digging and driving apparatus capable of solving the above-mentioned problems is provided directly or indirectly by interposing another member on the head of a steel pipe pile to be driven. A pile hitting device that is mounted on the steel pipe pile to penetrate the ground by applying a hit to the steel pipe pile, and around the pile hitting device in a state where the impact from the pile hitting device can be absorbed. A frame-like frame integrally attached thereto, a shear discharge pipe that is suspended from the frame-like frame and inserted into the inside of the steel pipe pile; A digging weight disposed at a lower end of the shear discharge pipe in a state where the pipe is penetrated, an equipment installation base integrally provided with the frame-shaped frame, and an equipment installation base Power unit placed above,
It is characterized by comprising at least a set of equipment that can operate the hitting device for piles such as winches and various sheaves and a weight for digging.

The second weight-type steel pipe digging and driving apparatus is mounted directly or indirectly on the head of the steel pipe pile to be driven by interposing other members. A pile hitting device for allowing the steel pipe pile to penetrate into the ground by adding the same, and a frame frame integrally attached around the pile hitting device in a state capable of absorbing the impact from the pile hitting device. And a slip discharge pipe that is suspended from the frame-shaped frame, inserted into the steel pipe pile, and is configured to be extendable and contractible in the pipe longitudinal direction. A digging weight disposed at a lower end of the slip discharge pipe in a state where the discharge pipe is penetrated, an equipment installation base integrally provided with the frame-shaped frame, and an equipment installation Power units and winches placed on the gantry With running at least the pile for percussion device and medium weight for digging of various sieves include,
And a set of equipment for performing the expansion / contraction operation of the shear discharge pipe. The telescopic shed discharge pipe includes, for example, one or a plurality of telescopic pipe sections including an inner pipe and an outer pipe, and a lower end of the telescopic operation wire is provided at a lower end of the lowermost telescopic pipe section. It is possible to adopt a structure in which the length of the slip discharge pipe is controlled by connecting and fixing, and winding / unwinding the telescopic operation wire.

In these cases, it is desirable that an adjustable guide device for adjusting to various steel pipe pile diameters is provided below the frame-shaped frame.

A major difference between the apparatus of the present invention and the conventional apparatus is that in the case of the apparatus of the present invention, the hoist basically does not have to be hung and held by a hoist ship, and has a device such as a winch or a power unit. The point is that the pile hitting device and the weight for digging can be operated by itself without using a ship or a barge, and the pile driving can be performed. Specifically, an equipment installation frame is provided integrally with the frame-like frame, and a set of equipment necessary for operating the apparatus is arranged on the equipment installation frame. Further, in the case of the conventional device, on the premise that the hydraulic hammer is always operated while the entire device is lifted, the frame frame-shaped frame and the hydraulic hammer are firmly integrated with bolts or the like, and the frame frame-shaped frame is formed. No consideration is given to vibrations and shocks transmitted to the frame, but in the case of the device of the present invention, an equipment installation frame is provided on the frame-like frame, and equipment necessary for construction is provided. Therefore, the frame frame-shaped frame and the hydraulic hammer are integrated by a structure capable of absorbing the impact so that vibration and impact from the hydraulic hammer are not transmitted to the frame-shaped frame as much as possible.
For example, as will be described later, vibration and impact are prevented from being transmitted by holding a hydraulic hammer in a hollow position inside a frame-shaped frame by an upper suspension wire and a lower suspension wire. In this case, the hydraulic hammer is suspended by the upper suspending wire in a state where the frame-shaped frame is lifted by the hoisting ship, and in a state in which the hydraulic hammer is mounted on the steel pipe pile head, the frame suspender is suspended by the lower suspending wire. Frame is suspended.

[0015] In the second weight-type steel pipe digging and driving apparatus, the slip discharge pipe is made particularly expandable and contractible in the longitudinal direction.
As will be described later, the steel pipe pile is penetrated by a hydraulic hammer with the shear discharge pipe contracted, and after the steel pipe pile is made to stand by itself, the middle digging weight is extended to the vicinity of the lower end of the steel pipe pile while extending the shear discharge pipe. It can be lowered.

Further, in the present invention, since the weight for digging is controlled to be lifted and lowered by a wire fed from a winch placed on a frame-shaped equipment installation base.
The lengthening of the operation of the wire for the boring weight is shortened, the wire tension is made uniform, and twisting is prevented, so that the time and effort of replacing the wire, which has frequently occurred in the past, can be saved. Become like

On the other hand, in the construction method using the first weight type steel pipe digging and driving apparatus, the steel pipe pile to be driven is held upright while the lower end of the pile is in contact with the ground, While the weight type steel pipe digging and driving device is hung by a hoist ship and mounted on the head of the steel pipe pile, while the weight type steel pipe digging and driving device is held by the hoisting ship in a suspended state,
If the steel pipe pile is penetrated to a predetermined depth position by operating the pile hitting device and / or the digging weight, the suspension holding by the hoist ship is released, and then the weight is placed on the top. The present invention is characterized in that the driving of the steel pipe pile is continuously performed while the steel pipe pile is driven in a self-supporting state equipped with a steel pipe excavation driving device.

Further, in the construction method using the second weight-type steel pipe digging and driving apparatus, the steel pipe pile to be driven is held upright while the lower end of the pile is in contact with the ground. While holding the type steel pipe digging and driving device by a hoisting ship and mounting it on the head of the steel pipe pile, while holding the weight type steel pipe digging and driving device in a suspended state by the hoisting ship, the slip discharge pipe is removed. If the steel pipe pile is penetrated to a predetermined depth position by operating the pile hitting device in a contracted state, the suspension holding by the hoist ship is released, and then the steel pipe penetration depth is set to the current position. In the fixed state, while repeatedly pulling up and dropping the weight for boring, the boring weight is lowered to a position near the lower end of the steel pipe pile while extending the shear discharge pipe. Independence equipped with excavation equipment It is characterized in that the continuously performed implantation of the steel pipe piles remain state.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of an upper side of a pile-type pile driving device 1 according to the present invention, FIG. 2 is a vertical sectional view of a lower side thereof, and FIG. 3 is an overall view thereof.

[0020] The weight-type co-digging pile driving device 1 mainly comprises a flying leader 2 which is a frame-shaped frame.
And equipment installation bases 3 and 4 integrally provided on the upper and lower parts of the flying leader 2, and power units, winches, air hose reels, various sheaves and the like installed on the equipment installation bases 3 and 4. And a hollow hydraulic hammer 5 arranged in a suspended state in the flying leader 2 and a hollow hydraulic hammer 5
A telescopic shed discharge pipe 6 vertically arranged through a hollow of the shed, and a shed discharge pipe 6 with the shed discharge pipe 6 penetrated therethrough.
And a weight 7 for digging, which is disposed at a lower position of the center.

Hereinafter, the flying leader 2 will be described in detail.
Has an insertion hole 11 at the bottom of the steel pipe pile P, and a plurality of adjustable guide devices 12, 12,... Which come into contact with the outer surface of the steel pipe pile P around the insertion hole 11.
The adjustable guide device 12 includes a pressing plate 12a.
And a jack 1 for moving the pressing plate 12a forward and backward.
2b, and by adjusting the position of the pressing plate 12a according to the outer diameter of the steel pipe pile P to be penetrated, the pressing plate 12a is brought into tight contact with the outer surface of the steel pipe pile P even if the diameter is different. It is made to be able to be. As described later, when the hollow hydraulic hammer 5 is mounted on the head of the self-standing steel pipe pile P, the pressing plate 12
are pressed against the outer surface of the steel pipe pile P so that the flying leader 2 is firmly supported. It should be noted that a joining block hardware 16 is fixed directly below the hollow hydraulic hammer 5 so as to correspond to the steel pipe piles P having a plurality of diameters.
The head edge of the steel pipe pile P is engaged with a predetermined engagement groove provided for each steel pipe diameter on the lower surface of the steel pipe pile.

On the other hand, hanging pieces 13, 13... Are provided at four tops of the flying leader 2, respectively, so that they can be hung by a hoist ship.

The hollow hydraulic hammer 5 disposed inside the flying leader 2 includes wire ropes 14, 14 laid between the upper portion of the flying leader 2 and the upper portion of the hollow hydraulic hammer 5, and the hollow hydraulic hammer 5. Of the flying leader 2 by means of wire ropes 15, 15.
It is supported in a suspended state inside. That is, when the flying leader 2 is hung on the hoist ship, the hollow hydraulic hammer 5 is suspended and supported, and when the hollow hydraulic hammer 5 is mounted on the head of the steel pipe pile P, the flying hydraulic It is supported by the hammer 5 in a suspended state.

On the other hand, on the upper part and the lower part of the flying leader 2, equipment installation stands 3 and 4 are provided integrally. Equipment such as power units, winches, reels for air hoses, and various sheaves necessary for pile driving work are installed on the equipment installation frames 3 and 4. Specifically, an air hose reel 1 for supplying the lift air supplied to the shear discharge pipe 6 is provided on the upper device installation base 3.
7, 17 and a sheave 18 for a boring weight operating wire,
A shear discharge pipe operation wire sheave 19 for adjusting the length of the telescopic discharge pipe 6 is installed. Further, on the lower device installation stand 4, devices such as a winch 21 for a boring weight, a winch 22 for a shear discharge pipe, a power plant 23 for a winch, and a power plant for a hydraulic hammer are installed. These equipment installation stands 3,
4 is provided with a fence all around in order to prevent a worker from climbing up for equipment operation or inspection and maintenance.

On the other hand, the slip discharge pipe 6 is a hollow hydraulic hammer 5
And an upper fixed pipe section 16A vertically penetrating the flying leader 2, a telescopic pipe section 16B, a lower upper fixed pipe section 16C, and a lower lower fixed pipe section 16D. FIG. 3A is an overall view of the state in which the shear discharge pipe 6 is fully extended, and FIG. 3B is an overall view of the state in which the shear discharge pipe 6 is fully contracted.

As shown in detail in FIG. 4, the telescopic pipe section 16B includes an upper connecting pipe 25, a first telescopic pipe 26, an intermediate connecting pipe 27, a second telescopic pipe 28, and an intermediate connecting pipe from the upper side. 29, a third telescopic pipe 30, and a lower connecting pipe 31 in this order, so that the first to third telescopic pipes 26, 28, 30 can expand and contract in the pipe longitudinal direction. Representatively, the first telescopic tube 26 will be described.
2 and an outer tube 33. The inner tube 32 is connected to the lower surface side of the upper connection tube 25 located on the upper side by bolts, while the outer tube 33 has an inner diameter substantially the same as the inner tube 32, A first outer tube portion 33A having an O-ring provided on the inner surface for sealing, a second outer tube portion 33B having a slightly larger inner diameter than the inner tube outer diameter continuously provided below the first outer tube portion 33A; 2
A third outer tube portion 34 continuously provided at the lower end of the outer tube portion 33B, and the inner tube 32 is inserted into the first and second outer tube portions 33A and 33B, so that the longitudinal direction of the tube is increased. It can be expanded and contracted.

The expansion and contraction control of the expansion and contraction pipe section 16B is performed by a shear discharge pipe winch 22 installed on the equipment installation base 4.
Telescopic tube operation wires 35A, 35
B is connected and fixed to the lower end of the third telescopic tube 30, and the length of the telescopic tube passage 16B is controlled by the winding / unwinding operation of the telescopic tube operation wires 35A and 35B.

On the other hand, two air supply hoses 36A, 36B are provided along the longitudinal direction of the shear discharge pipe 6, and these air supply hoses 36A, 36B are connected to the lower upper fixed pipe section 16C. The crushed waste is discharged to the outside of the system through the waste discharge pipe 6 together with the circulating water by an air lift method. The discharged waste and circulating water are roughly divided into circulating water and waste by the screen, and one of the waste is discharged to the residual soil tank,
The other circulating water (including sand) is sent to the cyclone by a sand pump, where it is separated into circulating water and sand.
Then, the low-specific-gravity circulating water that has passed over the cyclone is sent to the upper portion of the waste discharge pipe 6 again.

The air supply hoses 36A, 36B
Are fixed to the outer pipe 33 of the telescopic pipe section 16B.
5 and 6, the upper part of the fixing bracket 37 is connected to the telescopic pipe operation wires 35A, 35B and the air, as shown in FIGS. The supply hoses 36A and 36B are housed inside the protection tube 38, and guide guide rollers 39 provided at the upper and lower ends of the protection tube 38 are provided. Expansion and contraction with the supply hoses 36A and 36B are performed smoothly.

On the other hand, the digging weight 7 provided for the lower lower fixed pipeline 16D, which is the lowermost portion of the shear discharge pipe 6, is provided.
As shown in FIG. 7, the weight plates 40, 40... On which the bits 41, 41. Many of them are fixed radially by visual inspection.
An equalizer 43 is provided on the upper side of the lower end of the lower fixed pipe section 16D, and is connected to the two chains 44, 44. The equalizer 43 includes the boring weight winch 21 to the boring weight operating wire sheave 18.
Weight operation wire 45A fed out through
The lower end of 45B is connected and fixed, and after the lower digging weight 7 is pulled up with the lower lower fixed conduit 16D as a guide tube by the rotation control of the winding drum in the inner digging weight winch 21, When the tension is released at once, it falls freely and breaks the rock by impact.
The crushed waste is taken into the inside of the pipe through a waste intake port 16d provided at the lower end of the lower fixed pipe section 16D, and is discharged through the waste discharge pipe 6 to the outside.

Hereinafter, a method of driving the steel pipe pile P into the seabed by using the above-described weight type excavator 1 with piles will be described in detail with reference to FIGS.

First, in order to prevent the steel pipe pile P from being driven into the ground in an inclined state, a steel pipe pile guide frame 50 is installed near the sea surface as a preparatory work. Steel pipe pile guide frame 50
11, the guide piles 52, 52,... Along the column direction of the steel pipe piles P and on both sides of the central column line S, as shown in FIG.
, And vertical guide frames 51, 51 are disposed along the steel pipe piles P inside the guide piles 52, 52,... Are arranged between the horizontal guide frames 53, 53.

The steel pipe pile guide frame is not limited to the above example, and as shown in FIG. 12, for example, as shown in FIG. A steel pipe pile guide frame 59 composed of a steel pipe pile 61 composed of a steel pipe pile 61B and horizontal guide frames 62A and 62B is provided.
It may be held every time.

When the steel pipe pile P is inserted into the steel pipe pile guide frame 50 and the lower end thereof is brought into contact with the seabed, the pile with the heavy weight type excavation suspended on the head of the steel pipe pile P by the crane ship. The driving device 1 is installed.

As shown in FIG. 8, the hollow hydraulic hammer 5 is operated and the steel pipe piles P are hit while the steel pipe piles are struck, while the weight-driven drilling and pile driving device 1 is suspended by the hoist ship. The pile P is made to penetrate into the seabed ground. In this state, the shear discharge pipe 6 is contracted so that at least when the steel pipe pile P penetrates into the ground, it does not contact the sea bottom or hinder the penetration of the steel pipe pile P.

When the steel pipe pile P reaches an arbitrary predetermined depth L, in this example, a self-supporting penetration depth L, the suspension of the flying leader 2 by the hoist ship is released. At this point, the hoist ship is free and can start the work of placing another steel pipe pile P. By penetrating the steel pipe pile P to the self-supporting penetration depth L by the hoist ship, the steel pipe pile P can stand up without falling down even if the lifting support by the hoist ship is lost, and thereafter the pile can be safely driven while maintaining the vertical state. Will be able to do it.

Next, as shown in FIG. 9, while the steel pipe penetration depth L is kept at the current position, the lifting and dropping of the weight 7 for digging is repeated, and the slip discharge pipe 6 is extended. The digging weight 7 is lowered to a position near the lower end of the steel pipe pile P.

Thereafter, as shown in FIG. 10, the hydraulic hammer 5 strikes and hits the steel pipe pile P, and the hollow pipe excavation by repeating the lifting and dropping of the boring weight 7, while simultaneously excavating the steel pipe pile. P is penetrated to the planned depth position. In this middle digging and driving process, depending on the type of ground, the piercing of the pile is performed while one of the digging and driving is performed first, and the digging and driving are simultaneously performed at the tip of the steel pipe pile P. Can be. In other words, in the case of hard ground, cracking can be induced in the ground at the tip of the steel pipe pile P by digging the medium digging prior to driving, and the steel pipe pile P can be driven with a small impact force. In the case of soft ground, the penetration efficiency of the steel pipe pile P can be improved by preceding the driving. Further, in the case of the ground having an intermediate hardness, the penetration efficiency is improved by simultaneously performing the excavation and the driving.

The penetration of the steel pipe pile P is continued as described above, and when the tip of the steel pipe pile P reaches the supporting rock, the digging is performed in advance, and the hydraulic hammers 5 are used to drive the steel pipe pile P into a predetermined position. When the steel pipe pile P has been penetrated to the penetration depth K, the penetration work of the steel pipe pile is completed, and the penetration work of the next steel pipe pile is started.

In this embodiment, the steel pipe pile guide frame 50 is used near the sea surface in order to secure the penetration vertical accuracy of the steel pipe pile P. However, when the installation precision of the steel pipe pile P is not required, The steel pipe pile guide frame 50 may be omitted, and the steel pipe pile P may be temporarily held vertically by a hoist ship or the like. Of course, in this case, the initial penetration depth L needs to be sufficiently large so that the steel pipe pile P can stand alone without any other support.

As described above, the apparatus structure and the method of construction of the weight type steel pipe digging and driving apparatus 1 in which the slip discharge pipe is extendable and contractible have been described. However, the slip discharge pipe may be kept at a fixed length. In this case, when the steel pipe pile P is penetrated by the initial hydraulic hammer 5, the shear discharge pipe comes into contact with the seabed. Therefore, the weight type steel pipe digging and driving device 1 is suspended by the hoist ship. After the steel pipe pile P is penetrated to a predetermined depth position while using both the hammering in by the hollow hydraulic hammer 5 and the digging and digging by the digging weight 7, the suspension holding by the hoist ship is released. What should I do?

[0042]

As described above in detail, according to the present invention, the restraint of the hoist ship can be minimized, and the construction can be performed by a plurality of weight type underground pile driving devices by one hoist ship. And the cost of construction can be reduced by reducing the loss on hoist ships. Also,
It is possible to shorten the operation extension of the wire for the boring weight, and to equalize the wire tension and prevent torsion, so that it is possible to save labor for wire replacement which has conventionally frequently occurred.

[Brief description of the drawings]

FIG. 1 is a side view of an upper side of a pile-type pile driving device 1 with a weight-type underground digging according to the present invention.

FIG. 2 is a lower longitudinal sectional view thereof.

3A and 3B are overall views, in which FIG. 3A shows a state in which the shear discharge pipe 6 is fully extended, and FIG.

FIG. 4 is a longitudinal sectional view of a telescopic pipe section 16B of the tip discharge pipe 6.

FIG. 5 is a view taken along line VV of FIG. 4;

FIG. 6 is a view taken along line VI-VI of FIG. 4;

FIG. 7 is an enlarged side view of a weight 7 for digging.

FIG. 8 is a pile driving procedure diagram (part 1) of a steel pipe pile.

FIG. 9 is a pile driving procedure diagram (part 2) of a steel pipe pile.

FIG. 10 is a pile driving procedure diagram (part 3) of a steel pipe pile.

FIG. 11 is a plan view of a steel pipe pile guide frame.

12A and 12B are installation guide diagrams of a steel pipe pile guide frame by another method, in which FIG. 12A is a side view and FIG. 12B is a plan view.

FIG. 13 is a side view of a weight-type steel-pipe digging and hanging device 49.

FIG. 14 is a construction view of a conventional weight-type steel pipe digging combined with hanging method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pile driving device combined with weight-type inner digging, 2 ... Flying leader, 3 ... Mounting base for upper equipment, 4 ... Mounting base for lower equipment, 5
... Hollow hydraulic hammer, 6 ... Slip discharge pipe, 7 ... Pit weight for digging, 10 ... Leader body, 12 ... Adjustable guide device, 17 ... Air hose reel, 18 ... Sheave for digging weight weight operation wire, 19 ... Dip discharge Sheave for pipe operation wire, 21: winch for middle digging weight, 22: winch for shear discharge pipe, 16A: upper fixed pipe section, 16B: telescopic pipe section, 16C: lower upper fixed pipe section, 16D: lower lower section Fixed pipe section, 32 ... inner pipe, 33 ... outer pipe, 35A / 35B
... Expansion pipe operation wire, 36A / 36B ... Air supply hose, 50 ... Steel pipe guide frame, 52 ... Pile guide, 51 ... Vertical guide frame, 53 ... Horizontal guide frame, L ... Self-supporting penetration depth

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazumi Sakamoto 2-16-2 Minami Kamata, Ota-ku, Tokyo Tone Underground Engineering Co., Ltd. F-term (reference) 2D041 AA02 BA33 CA01 CB06 DB02 FA03 2D050 AA06 CA02 CB13 EE08 EE10 EE15

Claims (7)

[Claims] 1. A steel pipe pile to be driven is directly or indirectly mounted with another member interposed therebetween, and the steel pipe pile is penetrated into the ground by hitting the steel pipe pile. A pile hitting device, a frame-like frame integrally attached around the pile hitting device in a state capable of absorbing the impact from the pile hitting device, and a droop from the frame-like frame A shear discharge pipe inserted into the inside of the steel pipe pile, and a middle digging weight disposed at the lower end of the shear discharge pipe having a shaft through hole at the center and penetrating the shear discharge pipe And an equipment installation base provided integrally with the frame-like frame, and at least the pile hitting device such as a power unit, a winch, and various sheaves disposed on the equipment installation base, and Equipment that can operate a digging weight Weight type steel pipe during drilling implantation apparatus characterized by being composed of a vessel set. 2. A steel pipe pile to be driven is directly or indirectly mounted with another member interposed therebetween, and the steel pipe pile is penetrated into the ground by applying a blow to the steel pipe pile. A pile hitting device, a frame-like frame integrally attached around the pile hitting device in a state capable of absorbing the impact from the pile hitting device, and a droop from the frame-like frame And a slip discharge pipe that is inserted into the inside of the steel pipe pile and configured to be extendable and contractible in the pipe longitudinal direction,
A center digging weight which has a shaft through hole in the center and is disposed at a lower end of the waste discharge pipe while the waste discharge pipe is penetrated, and is integrally formed with the frame-shaped frame. The installed equipment installation base and the power unit, winch, various sheaves, etc., at least the pile hitting device and the digging weight, such as sheaves, arranged on the equipment installation base are operated, and the expansion and contraction of the shear discharge pipe is performed. A weight-type steel pipe digging and driving device, comprising a set of equipment for performing an operation. 3. An apparatus according to claim 1, further comprising an adjustable guide device provided at a lower portion of said frame-shaped frame to adjust to various steel pipe pile diameters. 4. The telescopic shed discharge pipe is provided with one or more telescopic pipe sections comprising an inner pipe and an outer pipe, and a lower end of a telescopic operation wire is provided at a lowermost telescopic pipe section. Connected to the lower end of the telescopic operation wire,
3. A weight type steel pipe excavating apparatus according to claim 2, wherein the length of the shear discharge pipe is controlled by the feeding operation. 5. A method of driving a steel pipe pile using the weight type steel pipe digging and driving device according to claim 1, wherein the pile target is driven in a state where the lower end of the pile is in contact with the ground. While holding the steel pipe pile upright, the weight type steel pipe digging and driving device is suspended by a hoist ship and mounted on the head of the steel pipe pile, and the weight type steel pipe digging and driving device is mounted by the hoist ship. If the steel pipe pile is penetrated to a predetermined depth position by operating the hitting device for piles and / or the weight for digging while holding in a suspended state, the suspension holding by the hoist ship is released. After that, the pile type pile driving method is characterized in that the pile pile is continuously driven while the steel pipe pile is driven in a self-supporting state with the weight type pipe drilling device installed on the top. 6. A method for driving a steel pipe pile using the weight-type steel pipe digging and driving device according to claim 2, wherein the lower end of the pile is brought into contact with the ground to be driven. While holding the steel pipe pile upright, the weight type steel pipe digging and driving device is suspended by a hoist ship and mounted on the head of the steel pipe pile, and the weight type steel pipe digging and driving device is mounted by the hoist ship. While holding in a suspended state, if the steel pipe pile was penetrated to a predetermined depth position by operating the pile hitting device with the shear discharge pipe contracted,
Release the suspension holding by the hoist ship, then, while keeping the steel pipe penetration depth at the current position, repeatedly pulling up and dropping the digging weight, while extending the shear discharge pipe, pulling the digging weight Lowering the steel pipe pile to a position near the lower end of the steel pipe pile, and then continuously driving the steel pipe pile in a self-standing state with the weight type steel pipe drilling device installed at the top Driving method. 7. The method according to claim 5, wherein a steel pipe pile guide frame is previously installed near the sea surface to hold the steel pipe pile upright.