JP4621538B2 - Joining device for driving pile and upper column - Google Patents

Description

  The present invention relates to an apparatus for joining a driving pile and an upper column for foundation construction required when a building such as a bridge station is newly built on a railway line or platform of a station, for example.

  Conventionally, in order to construct the foundation of the building as described above, a plurality of reinforced concrete column piles 52 are placed on the ground as shown in FIG. A hollow cylindrical steel pipe column 55 is erected on the steel plate 53, and is connected between a radial protrusion 56 provided on the outer periphery of the lower end of the column and an axial rebar 57 provided on the upper end surface of the pile. 58 was disposed, and concrete 59 was cast over a predetermined thickness so as to cover them.

  However, in the foundation constructed as described above, since the placing pile 52 is made of reinforced concrete, it is difficult to transmit the force from the steel pipe column 55 to be joined, and the tensile force is also inferior, so there is a problem in terms of strength. was there. In addition, the concrete 59 to be placed needs to have its upper surface aligned with the height of the upper surface of the platform of the station, so it is necessary to reduce the height as much as possible. There was a problem that the construction period was long and the workability was remarkably bad.

  Therefore, the present invention solves the problems of the prior art, strengthens the integration of the driving pile and the steel pipe column, facilitates transmission of force from the steel pipe column to the driving pile, and is excellent in tensile force. Moreover, it is an object of the present invention to provide a joining apparatus for placing piles and upper columns, which does not require concrete placement and can shorten the construction period.

In order to solve the above-mentioned problem, the invention according to claim 1 is a joining device between a driving pile and an upper column for foundation construction required when building a building such as a bridge station, and a hollow cylinder Steel pipe piles are placed on the ground at predetermined intervals, steel plates for joining are welded between the upper ends of these steel pipe piles, and hollow cylindrical steel pipe columns are erected on the steel plates A plurality of longitudinal steel reinforcements arranged at predetermined intervals so that the lower end portion of the steel pipe column and the steel plate connect the steel plate on the line connecting the outer peripheral surface of the lower end portion of the steel pipe column and the upper end surface of the steel pipe pile. It is welded with a rib .

  The invention according to claim 2 is the invention according to claim 1, wherein the flanged receiving tube is supported on the outer periphery of the upper end portion of the steel pipe pile, the receiving portion is provided on the outer periphery of the steel pipe pile, and the flange is above the steel pipe pile. The steel sheet is fitted and welded so that it is substantially flush with the end face, and the flange of the receiving tube is welded.

This invention is as described above, and a plurality of hollow cylindrical steel pipe piles are placed on the ground at a predetermined interval, and a connecting steel plate is welded between the upper ends of these steel pipe piles. A plurality of hollow tube-shaped steel pipe columns are set up so that the lower end portion of the steel pipe column and the steel plate are connected to a steel plate on a line connecting the outer peripheral surface of the lower end portion of the steel pipe column and the upper end surface of the steel pipe pile. Since this is welded with longitudinal steel reinforcing ribs arranged at predetermined intervals, the integration of the steel pipe pile and the steel pipe column is stronger than before, and the force from the steel pipe pillar is transmitted to the steel pipe pile. It becomes easy. In addition, the tensile force is excellent. Furthermore, because the steel pipe pile and the steel pipe column are firmly welded via the steel plate, there is no need to place concrete at the joint between the two as in the conventional case, so there is no material cost and the construction cost is low. In addition to being excellent in that the construction period can be shortened.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal front view showing an embodiment, and FIG. 2 is a transverse plan view. 1 is a hollow cylindrical steel pipe pile, a plurality of (4 in the drawing), as is apparent from FIG. In this way, the ground is driven to a predetermined depth. The steel pipe pile 1 is driven by a rotary press-fitting action by a driving machine (not shown). Since the steel pipe pile 1 uses a leading (closed lower end) closed leading pile with a digging blade at the front end when placing, the ground pipe does not enter the hollow pipe and the upper end is opened.

  Each steel pipe pile 1 is formed so that the upper end thereof has the same height, and a receiving portion 2 is welded to the outer periphery of the upper end portion at the same height position, and the upper end portion of the steel pipe pile 1 is fitted to the receiving portion. The lower end portion of the combined receiving tube 3 is supported. An annular flange 4 is provided at the upper end of the receiving tube 3 so as to project outward so that the upper surface thereof is substantially flush with the upper end surface of the steel pipe pile 1. Between the upper ends of the steel pipe piles 1, a connecting steel plate 5 having a regular square shape is supported by the flange 4 of the receiving tube 3 and welded together with the flanges and the upper end surfaces of the steel pipe piles 1. In the steel plate 5, an opening 6 having the same diameter as that of the opening is formed in a portion corresponding to the upper end opening of each steel pipe pile 1. The opening 6 is drilled in the steel plate 5 and does not block the upper end opening of the steel pipe pile 1. The welding of the upper end opening edge of the steel pipe pile 1 and the opening 6 edge of the steel plate 5 is ensured from above the steel plate 5. This is because it is performed firmly. In this example, the receiving tube 3 is simply fitted to the upper end of the steel pipe pile 1 and the flange 4 is welded to the steel plate 5 after fitting. However, if necessary, the tube body other than the flange 4 of the receiving tube 3 You may weld with the outer peripheral surface of the steel pipe pile 1 after fitting. In actual construction, the receiving portion 2 is preferably welded in advance to the outer periphery of the upper end portion of the succeeding pile to be hit last in the steel pipe pile 1, and is also welded in this example. The receiving cylinder 3 is also fitted in advance to the upper end portion of the subsequent pile to be hit last.

  A steel pipe column 7 is erected on the steel plate 5 so as to be positioned at the center of each steel pipe pile 1 at an equal interval. The steel pipe column 7 is formed of a hollow cylindrical pipe like the steel pipe pile 1 but has a large diameter. On the line connecting the outer peripheral surface of the lower end of the steel pipe column 7 and the upper end surface of the steel pipe pile 1, there are a plurality of steel reinforcing ribs 8, preferably two to three (three in the drawing), and the outer peripheral surface of the lower end of the steel pipe column 7 And the steel plate 5 on the wire are welded at equal intervals. The reinforcing rib 8 has a triangular plate shape as is apparent from FIG.

  Since the construction is as described above, for example, in order to construct a foundation necessary for newly building a bridge station on the platform of the station, first, the steel pipe pile 1 is placed in a predetermined position as described above. At the time of placing, the above-mentioned placing machine is used, and by the rotary press-fitting action, first a leading pile with a digging blade is attached to the tip, and then the subsequent pile is connected to the preceding pile and the necessary number is placed. The receiving part 2 is welded in advance to the outer periphery of the upper end of the succeeding pile to be hit last, and the receiving cylinder 3 is fitted to the upper end of the succeeding pile with the lower end supported by the receiving part. When is finished, the upper end of the succeeding pile that was hit last is the same position as the ground line 9. The upper end position of the subsequent pile to be hit last is adjusted to be equal in each steel pipe pile 1. In FIG. 1, the trailing pile that was hit last is shown. In the above description, the receiving portion 2 is welded in advance and the receiving tube 3 is preliminarily fitted, but it goes without saying that these may be welded and fitted after placement of each steel pipe pile as necessary. .

  Next, the steel plate 5 is fitted so that the opening 6 thereof matches the upper end opening of the steel pipe pile 1, and the edges of both the openings are welded. Since welding can be performed on the steel plate 5, it is easy to work, reliable, and extremely easy to work. Next, the steel pipe column 7 is erected on the steel plate 5 so as to be positioned at the center of each steel pipe pile 1, and on the line connecting the outer peripheral surface of the lower end of the steel pipe column 7 and the upper end opening surface of each steel pipe pile 1 on the steel plate 5. The reinforcing ribs 8 are arranged, and the side edges of the ribs and the outer peripheral surface of the lower end of the steel pipe column 7 and the lower end edges of the ribs 8 and the upper surface of the steel plate 5 are welded. The reinforcing rib 8 may be welded to the outer peripheral surface of the lower end portion of the steel pipe column 7 in advance, and in that case, welding may be performed only on the lower end edge of the rib 8 and the upper surface of the steel plate 5.

  In this embodiment, the upper surface of the home 10 is the top of the reinforcing rib 8. The home 10 can be constructed not only by concrete placement but also by steel plate as shown in this example. In this case, the pillar 7 and the reinforcing rib 8 appear under the home 10 as shown in the figure. There is only. The place where concrete is not placed remains the space 11.

  According to the joining apparatus as described above, after placing the steel pipe pile 1 at a predetermined position on the ground, the steel plate 5 is arranged and welded thereon, and the steel pipe column 7 is further erected on the steel plate 5. By welding the reinforcing ribs 8 provided on the steel pipe column 7 to the steel plate 5, it is possible to construct a foundation for a bridge station very easily compared to using a conventional concrete pile. . At that time, there is no need for troublesome bar arrangement work and concrete placement at the joint between the steel pipe pile 1 and the steel pipe pillar 7, and the steel pipe pile 1 and the steel pipe pillar 7 made of the same material are connected via the steel plate 5 for connection. Therefore, the work can be performed quickly. Moreover, since the steel pipe pile 1 and the steel pipe column 7 are made of the same material, their integration is also stronger, the force from the steel pipe column 7 can be reliably transmitted to the steel pipe pile 1, and the tensile force is also excellent. It will be strong. In addition, the construction period can be shortened.

  In the above, since the upper end opening of the steel pipe pile 1 is not closed by the steel plate 5 and is opened, it is possible to fill the steel pipe pile 1 with concrete using the opening. The filled concrete is joined to the steel pipe pile 1 and acts to increase its strength.

  The shapes of the steel pipe piles 1 and the steel pipe columns 7 shown in the above-described embodiment show a preferable example, and may have configurations other than those illustrated. For example, a cylindrical shape is not necessarily required. The number of steel pipe piles 1 is arbitrary as long as the number of steel pipe piles 1 is plural, and the steel plate 5 used for joining does not necessarily have to use the receiving tube 3. Furthermore, it is preferable that the steel pipe pile 1, the steel pipe column 7, and the steel plate 5 are made of iron in order to be welded and connected. However, if the material can be welded, the specific configuration is not necessarily made of iron. The design can be changed or modified as appropriate during implementation.

It is a vertical front view which shows one embodiment of this invention. It is a cross-sectional plan view same as the above. It is drawing corresponding to FIG. 1 which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel pipe pile 2 Receiving part 3 Receptacle 4 Flange 5 Steel plate 6 Opening 7 Steel pipe pillar 8 Steel reinforcement rib (reinforcement member)

Claims (2)

It is a connecting device between the driving pile and the upper column for foundation construction required when building a building such as Hashigami Station, and a plurality of hollow cylindrical steel pipe piles are driven into the ground at a predetermined interval. A connecting steel plate is welded between the upper ends of these steel pipe piles, and a hollow tubular steel pipe column is erected on the steel plate, and the lower end portion of the steel pipe column and the steel plate are connected to the lower end portion of the steel pipe column. A cast pile and an upper column, which are welded with a plurality of longitudinal steel reinforcing ribs arranged at predetermined intervals so as to connect the outer peripheral surface and the steel plate on the line connecting the upper end surface of the steel pipe pile. Joining device with.   A flanged cylinder is fitted to the outer periphery of the upper end of the steel pipe pile, and the lower end is supported by a receiving part provided on the outer periphery of the steel pipe pile, and the flange is fitted so that it is substantially flush with the upper end surface of the steel pipe pile. The joining apparatus of the placing pile and upper pillar of Claim 1 by which the steel plate is supported and welded by the flange of the receiving cylinder.

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