JPH0995939A - Longitudinal joint burying construction method for steel pipe pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the executing ability and economic ability of the longitudinal joint underground installation of a steel pipe pile. SOLUTION: Several pieces of regular sized steel pipe piles 3a, 3b are laterally joined on the ground and formed as a lower pile, and inserted in an underground hole 1, and a key reinforcement 5 is set on a bearing base 8 and supported with its head slightly protruded above the ground. Next the upper pile 3c of the regular sized steel pipe pile is suspended up and lowered on a lower pile, and they are mutually weldedly joined for ending longitudinal joint. After all longitudinally joined piles 3a, 3b, 3c are slightly suspended up to remove the key reinforcement 5, the piles 3a, 3b, 3c are lowered and inserted in the underground hole 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for burying ordinary steel pipe piles or steel pipe piles having joint members in the longitudinal direction by vertical connection.

[0002]

2. Description of the Related Art Steel pipe piles are manufactured to a fixed length for the convenience of manufacturing and transportation. However, when steel pipe piles longer than that are required, it is normal to use multiple steel pipe piles that have been delivered to the site. They are spliced together to form the required length and embedded. Conventionally, the steel pipe piles are joined to each other by welding in a state in which the steel pipe piles are laid down on the ground and formed into a required length. Then, this is lifted by a crane and suspended to carry out burial construction.

[0003]

As described above, in the construction of piles with a large depth that require the joining of steel pipe piles, in order to laterally join the steel pipe piles on the ground, a correspondingly large site is required. To do. At many construction sites, it is only possible to secure a site large enough to connect two steel pipe piles, and it is the actual situation that no more joints can be made. Therefore, it is not possible to bury piles with a large depth in urban areas where a large site is not available for construction.

Further, in order to hoist piles that have become long by joining them, a large-sized crane corresponding to them must be installed, which not only requires a large amount of cost, but also significantly increases the risk of work. become. Therefore, there has been a demand for improvement in the burial construction of steel pipe piles that require seaming.

The present invention has been made in view of the above circumstances, and in the process of inserting the steel pipe pile into the burial hole, that is, to vertically connect the lower pile previously inserted into the burial hole. The piles should be suspended for joining and welding, and in the case of steel pipe piles that have joint members, the method for accurately and easily aligning the joint members with each other should be adopted to increase the depth. It is intended to bury underground steel pipe piles safely, easily, and reliably and efficiently without the need for a long site or large crane.

[0006]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. In the construction method of claim 1, a plurality of steel pipe piles are grounded. To form lower piles 3a and 3b, insert the lower piles 3a and 3b into the embedding hole 1, and support the head with the head protruding above the ground. Steel pipe piles 3a, 3 having joint members that are vertically spliced after suspending an upper pile 3c that horizontally splices one or two pipes and performing longitudinal splicing
It is characterized in that the whole b, 3c is inserted into the buried hole.

Further, the construction method of claim 2 is such that the joint members 4, 4 are
A plurality of steel pipe piles having a
3b is formed, and the lower piles 3a and 3b are inserted into the burial hole 1 to support the head in a state of protruding above the ground, while joining the lower pile 3b and the upper pile 3a vertically connected to the lower pile 3b. Protrusions 10, 10 for alignment are provided at the ends of the protrusions 10 of the lower pile 3b.
After the guide jig 11 is fitted to the lower pile 3 and the guide jig 11 is erected, the upper pile 3c obtained by horizontally connecting one or two steel pipe piles is suspended on the lower pile 3b, and the projecting bodies 10 and 10 are guided and fixed. Lower stake 3 engaging with tool 11
The steel pipe piles 3a, 3b, 3c having joint members which are vertically connected to each other are inserted into the embedding hole 1 after being joined to c and vertically connected.

[0008]

Operation: A plurality of steel pipe piles 3a and 3b are laterally connected on the ground to form a lower pile. First, the lower piles 3a and 3b are the buried holes 1
And the head muscles are projected onto the ground, and the kanzashi muscles 5 are placed on and supported by the pedestal 8. The upper pile 3c is suspended and joined to the lower pile, and the upper pile 3c and the lower pile are joined by welding to form a vertical joint. Steel pipe piles 3a, 3b, 3c vertically connected to each other
Is lifted a little to remove the kanzashi muscle, and then suspended again to insert the whole into the embedding hole 1.

According to the construction method of claim 2, when the upper pile 3c is joined to the lower pile 3b, the guide jig 11 provided upright on the lower pile 3b is used.
By guiding and engaging the projection body 10 of the upper pile 3c with the introduction hole 13 of the above, the circumferential alignment of both piles 3c and 3b can be performed easily and reliably.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show the outline of construction in order of process.

When burying steel pipe piles, first, in the ground,
A buried hole 1 having a diameter larger than that of a steel pipe pile is excavated and formed to a predetermined depth, and soil cement 2 is filled therein. As the steel pipe pile 3 to be buried, a normal one simply formed of a steel pipe,
Alternatively, as shown in the figure, a steel pipe provided with a pair of joint members 4 and 4 in the longitudinal direction of the outer peripheral surface is used.

[0012] To the site, a factory-made standard (for example,
When the steel pipe pile 3 of 15 m) is carried in and the excavation hole 1 is long, 2 to 4 of the steel pipe piles 3 are spliced and buried. FIG.
4 shows an embodiment in which three steel pipe piles 3a, 3b, 3c are joined and buried. In this case, the two steel pipe piles 3a and 3b are joined together at their end faces in a state of being laid down on the ground, and laterally connected (joined) 9 by welding to form a lower pile.
Then, through holes 6 and 6 of the knapweed muscle 5 are provided at appropriate places above the lower piles 3a and 3b. In addition, the upper portion of the buried hole 1 is formed slightly wider, and the guide wall 7,
7, and pedestals 8 for supporting the piles are provided in the lower part thereof.

The lower piles 3a and 3b composed of two steel pipe piles are
As shown in Fig. 1, the crane is hoisted and the buried hole 1
It is dropped inside and inserted. At that time, the kakuza muscle 5 is inserted through the through holes 6 and 6, and both ends thereof are projected to the outside of the steel pipe. As shown in FIG. 2, the inserted lower piles 3a and 3b have their head ends projecting above the required height on the pedestal 8 by placing both ends of the kanzashi muscle 5 on the pedestals 8 and 8. ，
Suspended at 8. The projecting height is selected depending on the height position where the through holes 6 and 6 are provided and the depth position where the pedestals 8 and 8 are provided.

Next, the steel pipe pile 3C, which is the upper pile, is lifted by a crane and, as indicated by the arrow, the lower piles 3a, 3
While being aligned with b, it is lowered to join the end faces, and the two are joined by welding 9 to perform a vertical joint. As a result, a steel pipe pile having a predetermined length to be buried is formed. After that, as shown in FIG. 3, the vertically connected steel pipe piles 3a, 3b, 3c are lifted by a crane until the height of the kanzashi streak 5 is slightly above the ground, and the striking force is applied to the kanzashi streak 5. It is removed and, as shown in FIG. 4, it is lowered again to finish the insertion into the buried hole 1. After this insertion, the guide walls 7, 7 and the pedestals 8, 8 are removed, and the wide holes in which they are installed are backfilled.

Steel pipe piles 3a, 3 having joint members 4, 4
In the vertical connection between b and 3c, those joint members 4, 4 are connected.
Correct alignment between them is necessary. When the vertical connection of the steel pipe piles is performed by lying down on the ground as in the lower piles 3a and 3b, the positioning of the joint members 4 and 4 can be easily performed. However, when joining the upper pile 4C to the lower piles 3a and 3b inserted in the burial hole 1 by suspending them, not only the centering of the piles but also the circumferential alignment is required. Would be a hassle. In the present invention, such a problem of alignment is also solved.
Next, the embodiment will be described with reference to FIGS. 6 to 9.

In the steel pipe pile having the joint members 4 and 4, as shown in FIG. 5 and FIG.
The joint members 4 and 4 are provided with a length slightly inward from the end surface of the pile. In the present invention, the protrusions 10 and 10 for positioning are fixed to the outer circumferences of the joint ends of the steel pipe pile 3b and the upper pile 3c in the lower pile, which are located in the intermediate portions of the joint members 4 and 4, respectively. I'll do it. In this case, the upper and lower protrusions 10, 10 are opposed to each other in the axial direction of the pile.

On the other hand, a guide jig 11 is prepared in association with the projections 10 and 10. As shown in FIG. 9, this guide jig 11 is formed of a long long plate, and a protrusion 10 is formed on the lower part thereof.
And a fitting hole 12, and an upper open projection 10 at the top.
Introducing groove 13 is provided, and adjusting bolts 14, 14 are provided in the lower part of the introducing groove 13 so as to be movable back and forth in the introducing groove 13.

The work from inserting the lower piles 3a and 3b into the embedding hole 1 and suspending them in the hole and lifting the upper pile 3c by a crane and lowering it is the same as in the previous embodiment ( (See FIGS. 1, 2 and 5). In this case, while lowering the upper pile 3c, the positions of the joint members 4 and 4 of the upper pile 3c are
The positions of the joint members 4 and 4 of the lower pile are roughly matched. At that time, as shown in FIG. 6, the fitting jig 12 of the guide jig 11 is fitted into the protrusion 10 of the lower pile 3b to project the guide jig 11.

If the upper pile 3c is further lowered,
As shown in FIG. 7, the protrusion 10 of the upper pile 3c is a guide jig.
The upper pile 3c is joined and placed on the lower piles 3a and 3b while being guided and engaged with the introduction groove 13 which is opened upward. When the upper pile and the lower pile are joined, the joint members 4 and 4 may not be aligned left and right, and may be slightly displaced. In that case, if the adjusting bolts 14 provided on the guide jig 11 are moved back and forth to move the position of the protrusion 10 engaged in the introduction groove 13 laterally, the upper pile 3c will be As the protrusion 10 moves, it rotates in the circumferential direction, so that the joint members 4 and 4 can be properly aligned.

After the alignment of the upper and lower piles 3a, 3b is completed,
The joint ends of these are welded and joined together9, and at that time a guide jig is used.
Eleven are removed. In addition, the joint members 15 and 15 are provided between the joint members 4 and 4 of the upper and lower piles 3c and 3b (see FIGS. 7 and 8).
Is also attached by welding. The subsequent steps are the same as in the case of the previous embodiment (see FIGS. 3 and 4), and the description thereof will be omitted.

[0021]

As described above, according to the present invention,
When burying fixed-size steel pipe piles by splicing together, multiple piles are horizontally spliced and inserted into the burial hole, and suspended from the suspended lower pile, one or two steel pipe piles are spliced horizontally to suspend the upper pile. Since the steel pipe piles are vertically inserted and the entire steel pipe piles are inserted and buried, compared to the conventional method in which all the piles are horizontally spliced on the ground, the construction site can be reduced and the crane can be made larger. The work can be avoided safely and efficiently. In addition, it is possible to bury long piles in a small urban area.

In particular, according to the method of claim 2, in the vertical connection by suspending the piles, even if the steel pipe pile having the joint member, which is particularly difficult to align, is used for the construction, the alignment of the joint members can be surely performed. , It can be done easily and efficiently, and the construction period can be shortened.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention, showing a state in which a lower pile is inserted.

FIG. 2 is a schematic view showing a suspended state of the pile.

FIG. 3 is a schematic view showing a state in which the kanzaku muscle is removed.

FIG. 4 is a schematic view showing a state in which the burial is completed.

5 is an enlarged front cross-sectional view of a main part of FIG.

FIG. 6 is a sectional view of the same side where a guide jig is erected.

FIG. 7 is an enlarged side sectional view of the upper and lower piles joined together using a guide jig.

FIG. 8 is an enlarged front cross-sectional view showing a state in which the kanzashi muscle is removed.

FIG. 9 is an enlarged front view of the guide jig.

[Explanation of symbols]

 1 Buried hole 3a, 3b Steel pipe pile (lower pile) 3C Steel pipe pile (upper pile) 4 Joint member 5 Kanzashi muscle 7 Guide wall 8 Cradle 9 Joint part 10 Projection body 11 Guide jig 12 Fitting hole 13 Introduction groove 14 Adjustment bolt

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoji Hirose 3-1-3 Nihonbashi Muromachi, Chuo-ku, Tokyo Stock company Kubota Tokyo headquarters (72) Inventor Yoichi Yokoyama 3-1-3 Nihonbashi-Muromachi, Chuo-ku, Tokyo Company Kubota Tokyo Head Office (72) Inventor Hiroyuki Eguchi 1-6 Shiohama, Ichikawa, Chiba Kubota Ichikawa factory

Claims (2)

[Claims] 1. A lower pile is formed by horizontally connecting a plurality of steel pipe piles on the ground, and the lower pile is inserted into an embedding hole and supported with the head protruding above the ground. A steel pipe characterized by inserting an entire pile of a steel pipe having a joint member, which is vertically connected, after hanging an upper pile having one or two steel pipe piles horizontally spliced on top of the pile. Vertical pile construction method for piles. 2. A plurality of steel pipe piles having joint members are laterally connected on the ground to form a lower pile, and the lower pile is inserted into an embedding hole and supported with the head protruding above the ground. , On the other hand, the lower pile and the upper pile vertically connected to the lower pile are provided with alignment projections, which are fitted to the projections of the lower pile and the guide jig is erected. The upper pile, which is one or two steel pipe piles horizontally spliced, is hung, the protrusions are engaged with the guide jig to be joined to the lower pile, and the vertical splicing is performed. A method of vertically burying steel pipe piles, characterized in that the entire steel pipe pile having the above is inserted into the burying hole.