JP3031659B2 - Longitudinal joint method of steel pipe pile and positioning device used for the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for vertically joining steel pipe piles having joint members and a positioning device used for the method.

[0002]

2. Description of the Related Art Splicing of steel pipe piles by welding is performed sideways when the site is wide, but when the site is narrow, another steel pipe pile is butt-welded to the steel pipe pile inserted into the burial hole. It is performed by the longitudinal joint method.

When a steel pipe pile having a joint member in the longitudinal direction of the outer periphery is longitudinally joined, not only the axial alignment of the upper pile and the lower pile to be joined, but also the position of the joint member between the upper pile and the lower pile. Conventionally, it is necessary to adjust the position in the circumferential direction of the pipe, and conventionally, a cargo handling device such as a chain or a nylon sling is hung on the lower end of the upper pile, and the upper pile is rotated.

[0004]

However, in this conventional method, it is difficult to easily rotate the upper pile in cm and mm units due to friction between the lower pile and the backing ring generated when the upper pile is installed. In addition, the swinging of the suspended upper pile also affects, so much labor and time is required for positioning,
There was a demand for an improvement in cascading work.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is intended to make it possible to easily and efficiently join a steel pipe pile having a joint by a method using a guide jig. Is what you do.

[0006]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. The method according to the first embodiment comprises an upper pile 1a and a lower pile 1b. The positioning projections 5 and 6 are fixed to the outer periphery of each connecting portion at a plurality of positions in the circumferential direction so as to be vertically opposed to each other, and the introduction engaging grooves 10 of the projections 5 fixed to the upper pile 1a are fixed. Is formed on the projection 6 fixed to the lower stake 1b, and the jig 7 is erected on the lower stake 1b. The stake 1a is lowered, the protrusion 5 is inserted into the introduction engagement groove 10, and the upper stake 1a is connected to the lower stake 1b.
It is characterized in that it is bonded on top.

Further, in the apparatus according to the second aspect, the upper pile 1a and the lower pile 1b provided with positioning projections 5, 6 on the outer periphery of the connection end, and the lower pile 1b A fitting hole 9 is provided to be removably fitted to the projection 6 and a receiving portion 11 formed in a funnel shape from the upper end of the main body 8 at a position above the fitting hole 9 and a projection of the upper pile 1a. The receiving screw 12 is formed to be considerably wider than the body 5, and the introduction engaging groove 10 for the protrusion 5 is provided. It is provided to be able to move forward and backward in the cross direction of
The positioning jig 7 is provided.

[0008]

[Function] Fit to the projection 6 of the lower pile 1b inserted into the ground,
The protrusion 5 of the upper pile 1a is lowered and inserted into the receiving portion 11 of the standing guide jig 8. At this time, even if the horizontal positions of the protrusions 5 and 6 are slightly shifted, the protrusions 5 move down in the horizontal direction while hitting the funnel slope of the receiving portion 11, and the position is corrected. This is done automatically.

When the projection 5 is seated in the receiving portion 12 and still has a positional deviation in the circumferential direction, the projections 5 are moved forward and backward by moving the adjusting screw rods 13 and 13 respectively. The upper pile 1a is moved slightly in the lateral direction within the portion 12, and accordingly, the upper pile 1a is slightly rotated, so that a minute circumferential positioning adjustment can be performed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a state in which an upper pile and a lower pile are connected, FIG. 4 shows a connection process, and FIG. 5 shows a guide jig used in the present invention.

In the present invention, a steel pipe pile provided with a pair of joint members 3 and 4 in the longitudinal direction of the outer circumference of the steel pipe 2 is used. In the illustrated example, one is a male joint member 3 and the other is a female joint member 4. However, the present invention is not limited to the illustrated shape. The shapes can be combined with each other.

In the steel pipe pile having the joint members 3 and 4 as described above, the joint members 3 and 4 are slightly inward from the end face of the steel pipe 2 as shown in FIGS. It is provided with the length to the position. A welding groove 5 is provided at the lower end of the steel pipe 2, and a backing ring 14 is provided in the upper end of the steel pipe 2 of the lower pile 1b so as to protrude upward.

In the present invention, first, both joint members 3, 4 are attached to the outer periphery of each end of the upper pile 1a and the lower pile 1b, which are steel pipe piles to be connected.
And a plurality of positioning projections 5, 5, 6, and 6, each having a square cubic shape, are fixed by welding or the like. In this case, the protrusions 5, 5 of the upper pile 1a and the lower pile 1b are made to face each other in the vertical direction (axial direction).

On the other hand, guide jigs 7, 7 for positioning the two piles 1a, 1b are prepared in relation to the projections 5, 6. As shown in FIG. 5, the guide jig 7 is provided with a fitting hole 9 at the lower part of a main body 8 formed of a vertically long plate so as to be detachable from the projection 6 of the lower pile 1b. Further, an introduction engagement groove 10 of the projection 5 including a funnel-shaped receiving port 11 and a receiving portion 12 following the receiving port 12 is provided below the upper end of the main body 8. The lower part of the funnel-shaped receiving port is formed in a width that allows the protrusion 5 of the upper pile to pass through, and the receiving section is formed.
Numeral 12 is formed wide so that the protrusion 5 can be moved to a considerable extent in the lateral direction.

A pair of adjusting screw rods 13 and 13 with push bolts or the like which advance and retreat in a direction crossing the main body 8 are provided at the upper and lower central positions of the receiving portion 12 of the main body 8, respectively. It is provided so that it may protrude freely.

Next, an embodiment in which the upper pile 1a and the lower pile 1b are vertically connected will be described. First, the lower pile 1b to which the projections 6, 6 are fixed is inserted into the excavation hole for pile construction, and the upper part thereof is fixed with the upper part protruding above the ground for a required length. The guide jigs 8, 8 are fitted to the protrusions 6, 6 in the fitting holes 9, and are erected.

The upper pile 1a to which the projections 5 and 5 are fixed is lifted by a crane and transported directly above the lower pile 1b.
And the projections 5, 5 of the upper stake 1a are directed toward the receiving openings 11 of the guide jigs 8, 8 erected on the lower stake 1b in the circumferential direction. While lowering the position, go down. Then, after the protrusions 5 reach the widely opened upper ends of the receiving ports 11, 11,
It is guided by the funnel slopes 11a, 11a of the receiving port 11 and proceeds into the receiving section 12.

In this case, the position of the upper stake 1a in the circumferential direction is substantially determined in accordance with the projection 5 introduced to the narrowed lower end of the receiving port 11. The projections 5, 5 are seated in the receiving portions 12, 12, and at the same time, the lower end surface of the steel pipe 2 of the upper pile 1a is joined to the upper end surface of the steel pipe 2 of the lower pile 1b.

By the above-mentioned method, the circumferential positioning of the upper pile 1a with respect to the lower pile 1b is substantially performed.
In the state where the protrusion 5 is introduced into the receiving portion 12 of the guide jig 8, both piles 1 a,
The upper and lower positions of the joint members 1, 3, 4, and 4 of 1 b may still be slightly shifted. In this case, the tips of the pair of adjusting screw rods 13 provided on the guide jig 8 are moved forward and backward by touching the side surfaces of the projection 5 to adjust the movement in the lateral direction in the receiving portion 12 of the projection 5. To do. Thereby, the upper pile 1a rotates in the circumferential direction along with the movement of the protrusion 5, and accurate circumferential positioning can be performed.

After the positioning of the upper and lower piles 1a, 1b is completed, welding 15 (see FIG. 1) is performed along the outer periphery of the joint end of the steel pipes 2, 2 of both the piles 1a, 1b, and the guide jigs 8, 8 are mounted. Remove. And the joint members 3 of the upper and lower piles 1a, 1b
If the splicing members 16 and 17 (see FIG. 1) are attached between 3, 4, and 4 by welding, the vertical joining of the upper pile 1a and the lower pile 1b will be completed.

FIG. 6 shows another embodiment of the guide jig 7. In this embodiment, a bolt insertion hole penetrating in the transverse direction is provided at the upper end of the main body 8 where the receiving port 11 is provided, and a tightening bolt 18 is provided to be freely tightened. The tightening bolt 18 is attached after the protrusion 5 has entered the receiving portion 12 and serves to prevent the upper end of the guide jig 7 from opening when a strong lateral force acts on the guide jig 7. Will be.

[0022]

As described above, according to the present invention,
Inserting the projecting body of the upper pile descending into the guide jig standing on the projecting body fixed to the lower pile so that it can be aligned in the circumferential direction at the time of joining the pile, The joining work can be performed easily and efficiently, and the pile installation time can be greatly reduced, and the circumferential position can be corrected accurately in mm units.

Further, the device used for this device has a simple structure, can be manufactured at low cost, and can be easily handled. In addition, the guide jig can be removed and used repeatedly after construction.
Further cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side sectional view of the main part.

FIG. 4 is an explanatory view showing a descending process of an upper pile.

FIG. 5 is a front view showing a guide jig.

FIG. 6 is a front view showing another embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 steel pipe pile 1 a upper pile 1 b lower pile 2 steel pipe 3, 4 joint member 5, 6 protrusion 7 guide jig 8 main body 9 fitting hole 10 introduction engagement groove 11 receiving part 12 receiving part 13 adjusting screw rod 18 tightening bolt

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Jikken 40-6046 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) E02D 5/24

Claims (2)

(57) [Claims] 1. A plurality of positioning projections are fixed to the outer periphery of each connecting portion of an upper pile and a lower pile at a plurality of positions in the circumferential direction so as to be vertically opposed to each other. A guide jig for positioning provided with an introductory engagement groove was formed, and this was fitted to a protrusion fixed to the lower pile, and was erected, and then lifted on the lower pile built in. A method of longitudinally joining steel pipe piles, comprising lowering an upper pile, inserting a protrusion into an introduction engagement groove, and joining the upper pile to a lower pile. 2. An upper stake and a lower stake provided with positioning projections on an outer periphery of a connection end, and a fitting hole removably engageable with the projection of the lower stake provided at a lower portion of the main body. At the upper position of the fitting hole, a receiving portion formed in a funnel shape from the upper end of the main body and a receiving portion formed substantially wider than the projecting portion of the upper pile following the receiving portion. And a guide jig for positioning, which is provided with an adjusting screw rod whose tip can be inserted into the receiving portion so as to be able to advance and retreat in the transverse direction of the main body. Pile vertical joint positioning device.