JP2001200535A - Longitudinal jointing device for steel pipe pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform longitudinal jointing for a steel pipe pile by a mechanical means easily, rigidly by prohibiting its turning without welding. SOLUTION: At the end portion of an upper pile A1, a pin joint member 1 having an outer periphery as a joint surface is projected out, on the other hand, at the portion of a lower pile A2, a box joint member 2 for externally fitting to a pin joint portion 1 is projected out. At the joint surfaces of both the joint portions 1, 2, outer and inner grooves 17, 27 are respectively provided by facing each other, a circular arc key 5 housed in the inner groove 27 of the box joint member 2 is galled with both the grooves 17, 27 by the operation of a set bolt 3, and both the joint members 1, 2 are coupled as one united body. Also, a key groove in the pipe axis direction is provided on the joint surface between the pin joint member 1 and the joint surface of the box joint member 2, the key plate is fitted and inserted to the key groove and both the upper and lower piles A1 and A2 are connected in a manner of the rotation impossible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention can be widely applied to the vertical joining of steel pipe piles performed in the method of laying steel pipe piles (including steel pipe sheet piles). In particular, the steel pipe piles of the middle digging method and the like are laid by rotary press-fitting. TECHNICAL FIELD The present invention relates to a vertical joining apparatus for steel pipe piles, which is suitable for vertical joining of steel pipe piles in a method of construction or other method of giving rotation to a steel pipe pile upon subsidence.

[0002]

2. Description of the Related Art Generally, a method of laying a steel pipe pile is a hammering method by hitting, a pre-boring method of inserting into an existing drilling hole, or a method of excavating with an auger inserted into a steel pipe pile. There is a method of digging by rotating press-fitting, a method of sinking steel pipe piles only by rotary press-fitting, and a method of synthetic steel pipe piles. Recently, the method of middle digging is often used.

[0003] In the construction of steel pipe piles, a fixed-length steel pipe pile is carried into the site for production, transportation, etc., and the upper pile is hung by a crane against the lower pile in the submerging process. The construction is advanced while welding by welding, and a steel pipe pile of a predetermined length is laid down, and a welding method is used for this joining.

[0004] Since the joining by welding is an on-site welding, it takes a lot of time for the operation and requires a skilled welder. In addition, the quality of the welded portion is not only affected by the weather, but also required for welding. The use of hardware such as a backing ring is troublesome and requires a lot of cost. Therefore, as an alternative to longitudinal jointing by welding, a method of connecting the upper pile and the lower pile with a threaded joint (for example, Japanese Utility Model Application 57-133645)
No., Japanese Utility Model Application Laid-Open No. 57-98923, and JP-A-4-70414).

[0005]

However, the longitudinal joint method using a threaded joint is troublesome to manufacture and increases the cost. Moreover, since the vertical joining of the steel pipe piles is performed by suspending the upper pile on the lower pile, it is extremely difficult to rotate the steel pipe pile for screwing while suspending the lower pile. Moreover, in the construction method in which the steel pipe pile is laid by rotary press fitting, the pile may be reversely rotated at the time of construction, and in such a case, the screws are loosened. .

The present invention has been made to solve such a problem. Instead of using a method of welding or screwing a steel pipe pile, a vertical joint can be used firmly and without using a special machine or skill. An object of the present invention is to provide a vertical joint device for steel pipe piles by mechanical means, which can be easily performed, can couple an upper pile and a lower pile in a non-rotatable manner, and can be used for a middle boring method.

[0007]

The construction of the present invention for achieving the above object will be described with reference to the accompanying drawings. The apparatus of claim 1 is provided with a male pipe at one end of a steel pipe pile A1. A pin joint member 1 is protruded, and a female box joint member 2 to be fitted with the pin joint member 1 is protruded from a connection side end of the other steel pipe pile A2 longitudinally connected to the steel pipe pile A1. ,
Inner and outer grooves 17 and 27 are provided to oppose each other on the joint surface between the outer periphery of the pin joint material 1 and the inner periphery of the box joint material 2. An arc key 5 that straddles both the inner and outer grooves 17 and 27 by a set bolt 3 that is screwed in the radial direction by operation from the outside of the material 2.
The key joints 18 and 29 are provided in the joint direction between the outer periphery of the pin joint member 1 and the inner periphery of the box joint member 2 so as to face each other in the pipe axis direction. Grooves 18, 29
A key plate 30 is fitted into the joint member, and the two joint members 1 and 2 are non-rotatably connected to each other.

Further, in the apparatus according to the second aspect, the pin joint member 1 has a diameter smaller than that of the base cylinder portion 11 through the joining end surface 13 at the front end thereof following the base cylinder portion 11 in the device according to the first embodiment. Tube part 12
Is formed to extend, a concave groove 14 is provided on the joining end surface 13, a convex ridge 16 is provided on a distal end surface 15 of the fitting insertion tube portion 12, and the other box joint material 2 is Following the base tube portion 21, a fitting receiving tube portion 22 that is externally fitted to the fitting inserting tube portion 12 is formed by extending, and at the tip of the fitting receiving tube portion 22, a convex ridge 24 that fits into the concave groove 14 is formed. In addition to the above, the above-mentioned ridges
It is characterized in that a concave groove 26 to be fitted with 16 is provided.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show one embodiment of the apparatus of the present invention, and FIGS. 6 and 7 show other embodiments.

[0010] In FIGS 5, A ₁ is a steel pipe pile, A ₂ to be Uekui are steel pipe serving as a Shitakui. The upper pile A _1, under the pile
The end coupled to the A _2, pin joint member 1 of the male type having a cylindrical shape is provided to protrude downward by welding, also under Pile
A box joint member 2 having a cylindrical female shape, which receives and fits the pin joint member 1, is provided at an end portion of A ₂ that is connected and connected to the upper pile A ₁ so as to protrude upward by welding. I have.

[0011] pin joint member 1 continues the outer diameter based on tubular portion 11 which has substantially the same diameter as the outer diameter of Uekui A _1, joining end face of the tip 13
Through, a fitting insertion tube portion 12 having a diameter sufficiently smaller than the base cylinder portion 11 is extended, and a concave groove 14 is provided in a corner portion that intersects the joining end face 13 and the outer periphery of the fitting insertion tube portion 12. I have. Further, a lower end receiving surface 25 and a concave streak 26 of the box joint 2 described later
An end face 15 and a ridge 16 which are joined to each other are provided circumferentially.

The outer periphery of the fitting / inserting tube portion 12 is a joint surface with the inner periphery of the box joint member 2 described later.
A plurality of outer grooves 17 are provided around the upper and lower spaces.
Further, on the outer periphery of the insertion tube portion 12, a keyway 18 in the tube axis direction is provided over substantially the entire length of the insertion tube portion 12.

[0013] box joint member 2 has at its leading end followed an outer diameter based on barrel portion 21 substantially the same as the outer diameter of the lower pile A _2, the inner periphery in contact with the outer periphery of the fitting挿筒portion 12 fitted A fitting receiving tube portion 22 externally fitted to the tube portion 12 is extended forward, and at the tip thereof, a convex ridge that fits with an end surface 23 that receives the joining end surface 13 of the fitting insertion tube portion 12 and the concave groove 14. 24 is provided, and a receiving surface 25 for receiving the end surface 15 of the fitting insertion tube portion 12 and a ridge 16 are provided on a step portion between the base cylinder portion 21 and the fitting receiving tube portion 22.
A concave groove 26 that fits with the groove 26 is provided.

The inner periphery of the fitting receiving tube portion 22 is a joining surface with the outer periphery of the fitting / inserting tube portion 12.
At a position corresponding to the outer groove 17, an inner groove 27 sufficiently deeper than the outer groove 17 is provided around, and a screw communicating with the inner groove 27 from the outer periphery of the fitting cylinder 22 is provided. A plurality of holes 28 are provided at intervals in the circumferential direction. further,
A keyway 29 in the tube axis direction facing the keyway 18 in the tube axis direction is provided on the outer periphery of the insertion tube portion 12.

Then, the key groove 29 in each of the inner groove strips 27 is formed.
A plurality of divided arc keys 5 are housed in places other than the crossing points, and these arc keys 5 are screwed into screw holes 28 provided through the inner groove 27. By the operation of the bolt 3, the outer groove that is opposed from the inner groove 27
It is designed to be advanced and retracted to a position straddling inside 17. As shown in FIG. 4A, for example, the structure for moving the arc key 5 forward and backward is such that the set bolt 3 has a screw hole 28 at the base end thereof.
With a right-hand screw head 3a screwed with
It has a tail 3b that is screwed with the left screw (reverse screw) provided in the above. If the set bolt 3 is turned forward (right) and screwed in, the arc key 5 moves forward, and if it is turned reverse (left), The arc key 5 moves backward. The structure for moving the arc key 5 forward and backward is not limited to this.

A key plate 30 is provided which fits over both of the keyways 18 and 29 in the tube axis direction.

Upper pile A₁And lower pile A₂To cascade with
Pile A₁With a crane, lower pile A ₂Carry just above
Lower the pin joint material into the box joint material 2 fitting receiving cylinder part 22
1 is inserted. At that time, the arc key 5 is
While keeping it in Article 27, one of the keyways 18 and 29
Key plate 30 into place and stop with bolt 31 if necessary
(Fig. 5) and project from the keyway 18 or 29
Key plate 30 into the other keyway 18 or 29
go. Then, the end face 15 and the concave groove 14 of the pin joint material 1 and the end face
15 and the ridge 16 are the end face 23 and the concave groove 24 of the box joint material 2 and
Joining the receiving surface 25 and the concave groove 26 respectively,₁And lower pile A₂
Are non-rotatably connected to each other via the key plate 30
Will be. Also, the concave ridge 14 and the convex ridge 24 and the convex ridge 16 and the concave groove
26, the joint strength between the two joint materials 1 and 2
And, in particular, the bending resistance is increased.

Thereafter, the set bolt 3 is operated to push the arc key 5 into the outer groove 17. Thereby,
Arc key 5 will be fixed to a position astride the Ryomizojo 17,27, and the upper pile A ₁ and Shitakui A _2, to be inseparably firmly bonded through an arc key 5 Become.

FIG. 6 shows another embodiment of the apparatus of the present invention. In the above embodiment, the outer diameters of the two joint members ₁ and ₂ are substantially the same as those of the upper and lower piles A ₁ and A _{2. In} this embodiment, the inner diameters of the two joint members ₁ and ₂ are the same. The inner diameter of each of the piles 1 and 2 is substantially the same, and the outer diameter is larger than the outer diameter of each of the piles 1 and 2. In this embodiment, since there is no protrusion of the joint members 1 and 2 in the combined two piles 1 and 2, when the piles are buried by the middle digging method,
There is an advantage that insertion, excavation, and transport of excavated earth and sand can be performed smoothly. Other configurations are the same as those in the previous embodiment, and the description thereof is omitted.

Further, in the above embodiment, the upper pile A ₁ and Shitakui A
_Although it has the same diameter as ₂ , the device of the present invention can also be applied to vertical joints of different diameter piles. For example, as shown in FIG. 6, the upper pile A ₁ is a lower pile A ₂ in diameter may be larger in diameter. Furthermore, contrary to this, the upper pile A ₁ is a lower pile A ₂ a larger diameter may be small. The other configuration is the same as that of the previous embodiment, and the description is omitted.

In each of the above embodiments, the pin joint member 1 is provided on the upper pile and the box joint member 2 is provided on the lower pile. And the pin joint 1 on the lower pile. Also, the inner and outer grooves 17, 21 are provided in a plurality of steps, respectively, but it is possible to provide one or more necessary steps.

[0022]

As described above, according to the present invention,
In the vertical joint between the upper pile and the lower pile, which are steel pipe piles, the pin joint material protruding from one pile and the box joint material protruding from the other pile were inserted and provided on their joint surfaces. The arc keys housed in the inner and outer grooves are operated by an external operation.
Since the contract is made to straddle both the inner and outer grooves, the vertical joining of the upper and lower piles can be performed efficiently with extremely simple work, and the workability is easier than the conventional welding and screw joint methods. It is greatly improved.

The upper and lower piles are formed by a simple operation of fitting a key plate into a keyway in a pipe axis direction provided in the pin joint material when inserting the pin joint material into the box joint material. In this way, it is possible to keep the relationship that they cannot rotate with each other, and it is possible to reliably perform the burial construction by rotationally press-fitting the pile.

Further, in a configuration in which the end surface and the receiving surface and the end surface and the receiving surface of the fitting insertion tube portion and the fitting receiving tube portion are joined to each other and the concave and convex grooves are fitted, the joining and fitting of the two grooves allow the two fitting and fitting. The connection by fitting of the joint material is strengthened, and particularly, the bending resistance is enhanced.

[Brief description of the drawings]

FIG. 1 is a half cutaway side view showing an embodiment of the apparatus of the present invention.

FIG. 2 is a half sectional side view showing a portion where the key plate is fitted.

FIG. 3 is a half sectional view of the same.

FIG. 4 is an enlarged side sectional view of a contracted portion by an arc key;
(A) shows the state before the agreement, and (B) shows the state at the time of the agreement.

FIG. 5 is a perspective view showing an upper pile and a lower pile separately.

FIG. 6 is a half sectional side view showing another embodiment of the device of the present invention.

FIG. 7 is a half sectional side view showing still another embodiment.

[Explanation of symbols]

A ₁ Upper pile A ₂ Lower pile 1 Pin joint material 2 Box joint material 3 Set bolt 5 Arc key 11 Base tube part 12 Insertion tube part 13 Joining end surface 14 Concave streak 15 End surface 16 Convex 17 Outer groove 18 Tube axis direction Keyway 21 Base tube 22 Fitting tube 23 End surface 24 Convex ridge 25 Receiving surface 26 Concave groove 27 Inner groove 28 Screw hole 29 Tube axis direction key groove 30 Key plate

Continuing from the front page (72) Inventor Mitsugu Otsuki 1-6 Shiohama, Ichikawa-shi, Chiba Prefecture Inside the Kubota Ichikawa Plant Co., Ltd. Reference) 2D041 AA02 BA19 DB02 DB12 DB13 FA03 FA14

Claims (2)

[Claims] A male pin joint material is projected from one end of a steel pipe pile, and a female fitting to the pin joint material is fitted to a connection side end of another steel pipe pile longitudinally connected to the steel pipe pile. The box joint material of the shape is protruded, and the inner and outer grooves are provided facing each other on the mutual joining surface of the outer periphery of the pin joint material and the inner periphery of the box joint material. A set bolt which is screwed in the radial direction by operation from the outside of the box joint material accommodates a plurality of arc keys which are engaged over the inner and outer grooves at a plurality of intervals in the circumferential direction. A keyway in the pipe axis direction is provided facing the joint surface between the outer periphery of the material and the inner periphery of the box joint material, and a key plate is inserted into the keyways, and the two joint materials are non-rotatably connected to each other. A pipe jointing device for steel pipe piles. 2. A pin joint member is formed by extending a fitting insertion tube portion having a diameter smaller than that of the base cylinder portion through a connection end surface at the tip end of the pin connection material following the base cylinder portion, and a groove is formed in the connection end surface. At the same time, a ridge is provided around the distal end surface of the fitting / inserting tube portion, and the other box joint material is extended from the base tube portion to the fitting receiving tube portion which is externally fitted to the fitting / inserting tube portion. Formed at the end of the receiving cylinder portion, a convex groove is provided at the distal end of the fitting groove. The vertical joint device for a steel pipe pile according to claim 1, wherein the vertical joint device is provided.