JP2010059743A - Construction method of pier-type road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method of a pier-type road combining early opening of a road at the disaster restoration or the like and subsequent proper restoration work. <P>SOLUTION: The height of each of a plurality of driven steel pipe piles 3 is set to a predetermined height, and then a cylindrical pile head cap 2 with a plate member 12 mounted to the upper part is put on the head top of each steel pipe pile 3. A plurality of bolts 13 are screwed into threaded holes of nuts 18 welded to a cylindrical part 11 of each pile head cap 2, from the outside of the cylindrical part 11, and the outer periphery of the steel pipe pile 3 is pressed by the tip parts of the bolts 13 to fix the pile head cap 2 to the head top of the steel pipe pile 3. An H-shape steel cross beam 4 is fixed to the plate members 12 of a plurality of pile head caps 2 by bolts 15 and nuts 16, and H-shape steel main girders 5 are fixed to the H-shape steel cross beam 4 by bolts 15 and nuts 16. Lining plates 6 are laid on the H-shape steel main girders 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for constructing a pier type road in which a pile is placed in a place where a road is not provided, a road is constructed on the pile, and this is repeated one after another to extend the road.

As an example of such a pier type road construction method, the present applicant previously proposed and patented a pier type road construction method described in Patent Document 1 below. This pier type road construction method is to widen the road further to the valley side of the existing road on the slope, but welds a girder joint member called a pile head block to the top of the pile that has been placed. Then, the grading part of the grading girder in which the horizontal girder is fixed in advance is welded and fixed to the girder joining member, and the main girder is attached to the girder girder by bolts and nuts, and the main girder and the crossing girder are mounted on the girder joining member. Lay the road. The horizontal girder is a longitudinal girder in a direction intersecting the road extending direction, and the main girder is a longitudinal girder in the road extending direction. Moreover, there exists a thing described in the following patent document 2 as a joining member of a pile and a girder. In this pile and girder joining member, a flat plate material is preliminarily welded and fixed on the short cylindrical portion, and the short cylindrical portion is welded and fixed to the top of the pile, and then the girder member is placed on the flat plate material. Is mounted, and these girder members and flat plate materials are fixed with bolts and nuts.
Japanese Patent No. 3978644 JP 2008-57139 A

However, the pier type road described in Patent Document 1 is a full-scale road, for example, members such as a girder girder, main girder, pile head block, etc., in which a horizontal girder is fixed in advance, are designed according to specifications, It was manufactured at the factory, and it takes a relatively long period from the length of the manufacturing period to the completion of the road. For this reason, it is difficult to apply to early road opening in disaster recovery activities, for example. On the other hand, if the joint member of a pile and a girder described in Patent Document 2 is used, a relatively early road opening can be expected by using a steel beam girder for the girder member. However, since this joining member of a pile and a girder is what fixes a short cylindrical part to the top part of a pile by welding, for example, after constructing a temporary road once, for example, when constructing a full-scale road like patent documents 1 Therefore, it becomes difficult to remove the joining member.
The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a method for constructing a pier-type road that can achieve both early road opening and subsequent reconstruction after disaster recovery. To do.

  In order to solve the above-described problems, the method for constructing a pier-type road according to the present invention is to stake a pile on a non-road location, construct a road on the pile, and repeat this one after another to extend the road. A method for constructing a pier-type road, in which a plurality of piles piled up to a predetermined height, and then a cylindrical pile head with a flat plate attached to the top of each pile head Put a cap, screw a plurality of bolts from the outside of the cylindrical part into the screw holes formed in the cylindrical part of each pile head cap, and press the outer periphery of the pile at the tip part of those bolts The head cap is fixed to the top of the pile, the steel girders are fixed to the flat plate material of the pile head caps with bolts and nuts, and the lining plate is laid on these steel girders. Is.

Further, the plurality of bolts are screwed into the cylindrical portion of the pile head cap at equal intervals in the circumferential direction.
Also, when fixing the steel beam girder to the flat plate material of the pile head caps with bolts and nuts, fix the steel beam girder long in the direction intersecting the road extension direction to the flat plate material of the pile head cap with bolts and nuts. In addition, the main steel beams that are long in the direction intersecting with the steel beam cross beams are fixed to the steel beam cross beams with bolts and nuts.

  Thus, according to the pier type road construction method of the present invention, after the height of each of the plurality of piles set to a predetermined height, a flat plate material is attached to the top of each pile at the top. A plurality of bolts are screwed into the screw holes formed in the cylindrical portion of each pile head cap from the outside of the cylindrical portion, and the pile ends are The pile head cap is fixed to the top of the pile by pressing the outer periphery, the steel girders are fixed to the flat plate material of the pile head caps with bolts and nuts, and the lining plate is laid on these steel girders. Since the construction is constructed, it is possible to extend the road very easily as long as there is a pile head cap stock. The steel girders and pile head caps can be removed and the pile Since there is no damage the top, it is possible to construct a full-scale road by utilizing the pile. Moreover, the size of the pile is almost fixed, and since the removed pile head cap can be reused, the pile head cap stock itself is easy.

In addition, since a plurality of bolts are screwed to the cylindrical portion of the pile head cap at equal intervals in the circumferential direction, it is easy to obtain concentricity between the cylindrical portion of the pile head cap and the pile, and the balance is good. .
In addition, when fixing the steel beam girder to the flat plate material of multiple pile head caps with bolts and nuts, fix the steel beam girder long in the direction intersecting the road extension direction to the flat plate material of the pile head cap with bolts and nuts. Since the main steel girders that are long in the direction crossing the steel beam cross beams are fixed to the steel cross beams with bolts and nuts, the lining plate laid on the steel cross beam crosses the road extension direction. It can be arranged longitudinally in the direction, and the lining plate has good stability against traffic on the lining plate.

  Next, an embodiment of a pier type road construction method of the present invention will be described with reference to the drawings. FIG. 1 is a construction perspective view showing an embodiment of a pier type road construction method according to the present embodiment, and FIG. 2 is a front view thereof. The construction method of the pier type road of this embodiment is for constructing a temporary road for the purpose of disaster recovery, for example, as the first stage of the construction of the full-scale road described in Patent Document 1 described above. That is, after an early return of traffic is achieved by the jetty road of this embodiment, a full-scale road is constructed.

  The construction method of the pier type road of the present embodiment uses a so-called hand-stretching method in which a steel pipe pile is placed, a road is constructed on the steel pipe pile, and this is repeated one after another to extend the road. For example, as shown in FIG. 3A, this hand-stretching method is a method in which steel pipe piles 3 are placed in places where roads are not provided by heavy machinery C such as pile driving machines on the transmission base A, for example. A main girder 5 made of, for example, H-shaped steel is fixed above the steel pipe pile 3, and a lining plate 6 is laid for one span on the main girder 5. When the lining plate 6 is laid, the heavy machine C is advanced to that portion, and the steel pipe pile 3 is further driven in the place where the road is not provided, and the H-shaped steel main girder 5 is fixed above the steel pipe pile 3a. A lining plate 6 is laid for one span on the main girder 5. By repeating this, the road 20 is extended as shown in FIG. 3B, and when the construction of the road 20 for the final span is completed as shown in FIG. 3C, the heavy equipment C such as a pile driver is moved onto the terminal base B, for example.

  In such a hand-rolled method, the construction method of the pier type road according to this embodiment is as follows. Specifically, when the height of the steel pipe pile 3 is adjusted to a predetermined height as shown in FIGS. When the crown is cut so that the height of the pile 3 is constant, the pile head cap 2 is put on the crown of the steel pipe pile 3. The details of the pile head cap 2 will be described later, but the pile head cap 2 has a flat plate 12 welded and fixed to the upper end opening portion of the cylindrical portion 11 having a diameter larger than that of the steel pipe pile 3, and the opening portion thereof. Is obstructed. A plurality of screw holes are formed in the cylindrical portion 11 of the pile head cap 2 by a plurality of welded nuts, and a bolt 13 is screwed into each of the screw holes of the plurality of nuts. The tip of the bolt 13 screwed into the screw hole is pressed against the outer peripheral surface of the steel pipe pile 3 by the thrust of the screw, and the pile head cap 2 is fixed to the top of the steel pipe pile 3 by the reaction force applied to the screw hole. Is done.

  If the pile head cap 2 is fixed to the top of the steel pipe pile 3 in this way, the pile fixed to the top of the steel pipe pile 3 in which the transverse girders 4 made of H-shaped steel are aligned in the direction intersecting the road extending direction. The H-shaped steel cross beam 4 and the flat plate material 12 of the pile head cap 3 are fixed with bolts and nuts. Further, when the H-shaped steel cross girder 4 is fixed to the pile head cap 3 in this way, the main girder 5 made of H-shaped steel is hung over the H-shaped steel cross beams 4 aligned in the road extending direction. The H-shaped steel main beam 5 and the H-shaped steel beam 4 are fixed with bolts and nuts. In this case, when the H-shaped steel main girder 5 previously mounted on the H-shaped steel cross beam 4 and the H-shaped steel main girder 5 mounted later on the same H-shaped steel cross beam 4 interfere with each other, the H mounted later What is necessary is just to shift the position of the shape steel main beam 5 a little. Then, when the H-shaped steel main girder 5 for one span is fixed in this way, the lining plate 6 is laid longitudinally in a direction intersecting with the road extending direction so as to hang over the upper part. A vehicle or a person can pass directly on the lining board 6.

  In FIG. 4, the main junction structure of the construction method of the pier type road of this embodiment is shown. In this figure, the H-shaped steel cross beam 4 is stretched over the steel pipe pile 3. It can also be seen that reinforcing ribs 14 are erected between the cylindrical portion 11 of the pile head cap 3 and the flat plate 12. In the pile head cap 3, a reaction force acts when the tip of the bolt 13 screwed into the screw hole of the cylindrical portion 11 presses the outer peripheral surface of the steel pipe pile 3, and the reaction force is transferred from the bolt 13 to the screw hole. The bolt 13 and the screw hole are fixed by acting, whereby the pile head cap 3 is fixed to the top of the steel pipe pile 3. Further, the screw portion of the bolt 15 is inserted into the lower flange 4L of the H-shaped steel beam 4 mounted above the pile head cap 3 and the flat plate 12 of the pile head cap 3 from below, and from the lower flange 4L. The nut 16 is screwed and tightened to the thread portion protruding upward, and the H-shaped steel cross beam 4 is fixed to the pile head cap 3. Furthermore, the threaded portion of the bolt 15 is inserted from above into the lower flange 5L of the H-shaped steel main beam 5 mounted above the H-shaped steel beam 4 and the upper flange 4U of the H-shaped beam beam 4. A nut 16 is screwed and tightened to a screw portion protruding downward from the upper flange 4U, and the H-shaped steel main girder 5 is fixed to the H-shaped steel cross girder 4. And the longitudinal direction of the H-shaped steel main girder 5 is laid so that the longitudinal direction of the lining board 6 is aligned with the direction intersecting, that is, the direction intersecting with the road extending direction. By doing in this way, it becomes possible to suppress the position shift of the lining board 6 with respect to upper traffic, and it is excellent in stability.

  In FIG. 5, the detail of the pile head cap 2 is shown. As described above, since the cylindrical portion 11 of the pile head cap 2 is placed on the top of the steel pipe pile 3, an inner steel pipe slightly larger than the outer diameter of the steel pipe pile 3 is used. Inside the cylindrical portion 11 made of this steel pipe, a guide rib 17 having a cross-shaped cross section in plan view is provided separately from the reinforcing rib 11 described above. This guide rib 17 is for guiding the inner diameter of the steel pipe pile 3 and guiding the pile head cap 2 concentrically or substantially concentrically with the steel pipe pile 3. Of course, even if it is for guidance, the strength is also reinforced.

  A nut 18 is welded and fixed to the cylindrical portion 11 of the pile head cap 2 at a position slightly shifted from the guide rib 17 and at equal intervals in the circumferential direction, specifically every 90 °. A through hole (not shown) is formed in the cylindrical portion 11 corresponding to the screw hole portion. The screw hole of the nut 18 constitutes a screw hole into which the bolt 13 is screwed. Since the steel pipe constituting the cylindrical portion 11 is not so thick, it is easier to weld and fix the nut 18 than to weld and fix individual members to form screw holes (tapping).

  A long hole 19 for inserting a bolt 15 for fixing the H-shaped steel cross beam 4 is provided at a symmetrical position of the nut 18 sandwiching the guide rib 17 in the flat plate material 12 of the pile head cap 2. A notch 20 is opened at the opening position of the long hole 19 in the cylindrical portion 11 of the pile head cap 2. This notch 20 allows the operator to insert his / her hand so that the bolt 15 can be easily inserted, screwed and tightened.

  According to the pier type road construction method of this embodiment, when performing day and night work for the purpose of disaster recovery, for example, there is a track record of extending the road by 6 meters per day. That is, if the road restoration length is about 50 m, the road can be restored in about 8 days. If the temporary road can be restored in this way, as described in Patent Document 1, it is possible to construct a full-scale road while securing a part of the traffic function. When constructing a full road, the H-shaped steel main girder 5, the H-shaped steel cross girder 4, and the pile head cap 2 can be removed by removing the bolts 13 and 15 after removing the laid lining plate 6. And since the top part of the steel pipe pile 3 is not damaged, what is necessary is just to construct a full-scale road using the steel pipe pile 3. FIG. In addition, the road constructed according to the present embodiment may be used on a daily basis as it is.

  Thus, according to the construction method of the pier type road of this embodiment, after making the height of the plurality of cast steel pipe piles 3 into a predetermined height, respectively, the top of each steel pipe pile 3 is placed on the top. A cylindrical pile head cap 2 to which a flat plate 12 is attached is covered, and a plurality of nuts (screw holes) 18 welded (formed) to the cylindrical portion 11 of each pile head cap 2 from the outside of the cylindrical portion 11. The pile head cap 2 is fixed to the top of the steel pipe pile 3 by pressing the outer periphery of the steel pipe pile 3 with the bolts 13 and screwed with the tip ends of the bolts 13. 12 H-steel girders 4 and 5 are fixed with bolts 15 and nuts 16 and the lining plate 6 is laid on the H-steel girders 4 and 5 so that there is even a pile head cap 2 stock. For example, it is possible to extend the road very easily. Since the road can be opened and the bolts 13 and 15 are removed, all the steel girders 4 and 5 and the pile head cap 2 can be removed, and the top of the steel pipe pile 3 is not damaged. A full road can be constructed using the steel pipe pile 3. Moreover, since the magnitude | size of the steel pipe pile 3 is decided and the removed pile head cap 2 can be reused, the stock of the pile head cap 2 itself is easy.

Further, since the plurality of bolts 13 are screwed to the cylindrical portion 11 of the pile head cap 2 at equal intervals in the circumferential direction, the cylindrical portion 11 of the pile head cap 2 and the steel pipe pile 3 are concentric. Easy to obtain and well-balanced.
Further, when fixing the H-shaped steel girders 4 and 5 to the flat plate 12 of the plurality of pile head caps 2 with bolts 15 and nuts 16, the H-shaped steel cross girders 4 that are long in the direction intersecting with the road extending direction are used as the pile head cap 2 is fixed to the flat plate 12 with bolts 15 and nuts 16, and the H-shaped steel main beams 5 that are long in the direction intersecting the H-shaped steel beams 4 are fixed to the H-shaped steel beams 4 with bolts 15 and nuts 16. Therefore, the lining plate 6 laid on the H-shaped steel main girder 5 can be arranged in the longitudinal direction in the direction intersecting the road extension direction, and the lining plate is against the traffic on the lining plate 6. 6 stability is good.

It is a perspective view which shows one Embodiment of the construction method of the pier type road of this invention. It is a front view of the construction method of the pier type road of FIG. It is explanatory drawing of a hand-rolling method. It is detailed explanatory drawing of the main junction part of the pier type road of FIG. It is explanatory drawing of the pile head cap used for the construction method of the pier type road of FIG. 1, (a) is a top view, (b) is a partial cross section front view.

Explanation of symbols

  2 is a pile head cap, 3 is a steel pipe pile, 4 is an H-shaped steel girder, 5 is an H-shaped steel main girder, 6 is a lining plate, 11 is a cylindrical part, 12 is a flat plate, 13 is a bolt, 14 is a reinforcing rib , 15 bolts, 16 nuts, 17 guide ribs, 18 nuts (screw holes), 19 long holes, and 20 notches

Claims (3)

  A method for constructing a pier-type road in which a pile is placed in a place where there is no road, a road is built on the pile, and this is repeated one after another. After each height is set to a predetermined height, the top of each pile is covered with a cylindrical pile head cap with a flat plate attached to the top, and screw holes formed in the cylindrical portion of each pile head cap are covered. A plurality of bolts are screwed together from the outside of the cylindrical part, and the pile head cap is fixed to the top of the pile by pressing the outer periphery of the pile at the tip of the bolts, and the flat plate material of the plurality of pile head caps A method for constructing a pier type road characterized in that a steel beam girder is fixed with bolts and nuts and a lining plate is laid on the steel beam girder.   The pier-type road construction method according to claim 1, wherein the plurality of bolts are screwed into the cylindrical portion of the pile head cap at equal intervals in the circumferential direction.   When fixing the steel beam girder to the flat plate material of the plurality of pile head caps with bolts and nuts, fix the steel beam girder long in the direction intersecting the road extending direction to the flat plate material of the pile head cap with bolts and nuts, 3. A method for constructing a pier-type road according to claim 1 or 2, wherein a main steel beam girder that is long in a direction intersecting the steel beam cross beams is fixed to the steel beam cross beams with bolts and nuts.

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