JPH0415794Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a formwork receiving device for backfilling concrete in earth retaining shoring.

(Prior technology) For example, in underground construction work when constructing a high-rise building, a construction method is used in which sheet piles are driven in to form a so-called earth retaining wall and the inside of this earth retaining wall is dug. In order to prevent this, an H-shaped steel strip is installed, and concrete is backfilled between the strip and the sheet pile. When backfilling the concrete, it is necessary to use the Utility Model Application No. 51-43009
A formwork receiving metal fitting as seen in Japanese Patent No. 59-173741 is used.

(Problem to be solved by the invention) However, in the case of the frame receiving metal fitting described in the above-mentioned Japanese Utility Model Publication No. 51-43009, since the part fixed to the H-beam steel and the receiving rod are integrally constructed, the H If the gap between the shaped steel and the sheet pile (earth retaining wall) cannot be properly handled, and the gap is wide, the tip of the receiving rod will not reach the sheet pile, making support of the frame plate unstable, and if the gap is narrow, Since this becomes unusable, it is not only necessary to prepare several types of support fittings with different effective lengths, but also the weight of the filled concrete must be supported only by the tightening force of the bolts in the fixed part. Therefore, there are concerns about load capacity. Also, Jitsukai 1983
In the device described in Publication No. 173741, the above-mentioned problem is solved because the receiving rod is slidably supported on its support, but the support for the receiving rod is bored in the H-shaped steel. Since it is designed to be installed using the through hole in the H-shaped steel, the installation interval of the receiving rods is regulated by the through-hole drilled in the H-shaped steel, and the through-hole is used to connect the H-shaped steel. It has the disadvantage that it cannot be used in areas where the steel is used or for H-shaped steel without through holes.

The present invention aims to provide a formwork receiving device for backfilling concrete in earth retaining shoring, which overcomes the problems and inconveniences of the conventional devices described above.

(Means for Solving the Problems) The formwork receiving device for backfilling concrete according to the present invention has a usage mode shown in FIG.
A front support part 3 having a hanging member 2 for horizontally slidably supporting the receiving rod 1 and a rear support part 5 detachable from the lower edge of the rear wall 4B of the H-shaped steel 4
between the hanging member 2 and the rear support part 5, the front end part 6 is pivotally attached to the upper end part 7 of the hanging member 2, and the rear end part 8 is attached to the upper part of the rear support part 5. A support shaft 9 is provided which is longer than the inner dimension of the front and rear walls of the H-shaped steel which is pivoted and extends diagonally upward toward the front, and the front end 6 of the support shaft 9 extends upward from the lower side of the H-shaped steel 4 for raising the stomach. Front and rear walls 4 of H-shaped steel 4 in a tilted position
A, 4B, and after temporarily fixing the rear support part 5 to the lower edge of the rear wall 4B of the H-shaped steel 4, tighten the adjustment screw 15 or 24 of the front support part 3 to secure the support. The front end 6 of the shaft 9 is pressed against the upper part of the inner surface of the front wall 4A of the H-shaped steel 4, so that the front support part 3 is held in position so that it cannot be lowered. It is also possible to use a turnbuckle means as shown in FIGS. 5 and 6 as the support shaft 9, and a right-handed threaded rod 11 is screwed into one of the adjusting parts 10, and a left-handed threaded rod 12 is screwed into the other. A device equipped with an extendable mechanism called a so-called adjustment link tightening screw is used. This is adapted by making the length of the support shaft variable when the size of the H-shaped steel 4 is different.

(Function) As shown in FIG.
By attaching the support shaft 9 to the lower edge of the rear wall 4B of the type steel 4 and bringing the front end 6 of the support shaft 9 into contact with the upper inner surface of the front wall 4A of the H-type steel 4, the front support part 3 is prevented from descending, and the front The support part 3 can be placed below the H-shaped steel 4, the receiving rod 1 is supported so as to be movable back and forth, and can freely protrude toward the retaining wall, and the adjusting screw 15 or mat 24 can be tightened. The receiving rod 1 is fixed to the lower edge of the H-shaped steel 4 to support the bottom formwork 27 of the filled concrete C. Even if a large load is applied to the front half of the receiving rod 1 due to filling with concrete C, the load is applied from the front end 6 of the support shaft 9 to the H-shaped steel 4 side. Therefore, the receiving rod 1 is reliably held, and the receiving device can be easily removed after the concrete C has dried, which helps improve work efficiency.

(Embodiment) To explain in more detail the drawings showing the embodiment of the present invention, FIG. 1 shows a receiving device using a single receiving rod.
As shown in FIG. 2, the front support part 3 of the
4, a support plate 16 is inserted between the vertical rods 13, 13 and supported from below by an adjusting screw 15.
A hanging member 2 is provided to protrude upward from the center of the upper horizontal plate 14. As shown in FIG. 3, the rear support portion 5 includes a short tube body 17 through which the receiving rod 1 can be inserted, a protrusion 18 provided on the front side of the short tube body 17, and a rear side of the short tube body 17. a protruding piece 19 provided on and a tightening bolt 20 screwed into the protruding piece;
The lower edge of the rear wall 4B of the H-shaped steel 4 is positioned in the recess between the protrusion 18 and the projecting piece 19, and the rear support portion 5 is fixed to the H-shaped steel 4 by tightening the bolt 20. A support shaft 9 is adapted to have a front end 6 pivoted to an upper end 7 of the hanging member 2.
The rear end portion 8 is pivotally connected to the upper part of the rear support portion 5 and extends diagonally upward toward the front, and its length is longer than the inner dimension of the front and rear walls 4A, 4B of the H-shaped steel 4. It should be noted that the use of a turnbuckle as shown in FIGS. 5 and 6 as the support shaft 9 also belongs to the present invention, and as is well known, the turnbuckle has an adjustment part 10 in the center that can be rotated, and the adjustment part 10 A right-handed threaded rod 11 is screwed together from one side, and a left-handed threaded rod 12 is screwed from the other side. For example, the upper end 7 of the hanging member 2 is pivotally attached to the front end 6 of the right-handed threaded rod 11, Rear end 8
is pivotally attached to the protrusion 18 of the rear support portion 5, and the effective length of the turnbuckle is sufficiently larger than the inner width of the front and rear walls 4A, 4B of the H-shaped steel 4.

FIG. 5 shows an embodiment including a support portion that holds two receiving rods 1, 1 spaced apart from each other in parallel and slidably in the front and back direction. That is, the front support part 3 has through holes 2 on both sides for inserting and holding the receiving rods 1, 1.
1 and 21, a vertical hole 23 is bored in the center of the bar 22, and a hanging member 2 with a threaded portion is inserted into the vertical hole 23, and the lower end thereof is inserted. A nut 24 is screwed on, and the upper end 7 of the suspension member 2 is pivotally connected to the front end 6 of the turnbuckle. Further, the rear support portion 5 includes an L-shaped bar 26 having the same length as the bar 22 and having insertion holes 25, 25 for the receiving rods 1, 1 at the same position, and a front portion of the upper surface of the L-shaped bar 26. It consists of a protrusion 18 and a protrusion 19 provided with a tightening bolt 20 provided at the rear of the upper surface.
The rear end portion 8 of the turnbuckle is pivotally connected to the turnbuckle.

Also, FIG. 6 shows the front support part 3 in FIG. 5 above.
This shows an embodiment in which two hanging members 2, 2 and protrusions 18, 18 are provided on the rear support portion 5, respectively, and two turnbuckles are arranged.

(Effect of the invention) As described above, the formwork receiving device for backfilling concrete in the earth retaining shoring according to the present invention is as follows:
A front support part 3 for slidably supporting the H-shaped steel 4 in a horizontal direction, and a rear support part 5 that can be fixed to the lower edge of the rear wall 4B of the H-shaped steel 4, and a suspension extending upward from the front support part 3. A member 2 is provided, the hanging member 2
and the rear support part 5, the front end part 6 is pivoted to the upper end part 7 of the hanging member 2, and the rear end part 8 is pivoted to the upper part of the rear support part 5 and extends diagonally toward the front. Since the support shaft 9 extending upward is provided, the rear support part 5 is fixed to the lower edge of the rear wall 4B of the H-shaped steel 4, and the adjusting screw 15 or the nut 2 is attached to the rear support part 5.
4 and attach the front end 6 side of the support shaft 9 to the H-shaped steel 5.
By pulling down the inner surface of the front wall of the front wall, the front and rear walls 4A and 4B are fixedly tensioned with the support shaft 9, and the receiving rod 1 can be supported on the lower surface side of the H-shaped steel 4 so as to be freely movable back and forth. It can be freely projected between the shaped steel 4 and the sheet pile Y. Moreover, since the front support part 3 is suspended and supported by the front end part 6 of the support shaft 9 that abuts obliquely upward toward the inner surface of the front wall 4A of the H-shaped steel 4, the front support part 3 is suspended downward. The load bearing capacity is extremely high, and there is no fear that the receiving device will fall off due to the weight of concrete loaded on the protruding portion of the receiving rod 1. Therefore, the bolts 20 for temporarily fixing the rear support portion 5 do not necessarily have to be provided. Furthermore, since the receiving device can be easily attached to and removed from the H-shaped steel, it is useful in practical terms, such as helping to improve the workability of construction work.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view, and FIGS. 2 and 3 are views of the first embodiment.
FIG. 4 is a simplified side view of the front support part and rear support part in the figure, and FIGS. 5 and 6 are perspective views showing other embodiments. DESCRIPTION OF SYMBOLS 1... Receiving rod, 2... Hanging member, 3... Front support part, 4... H-shaped steel, 5... Rear support part, 6
...Front end of the support shaft, 7... Upper end of the hanging member, 8... Rear end of the support shaft, 9... Support shaft.

Claims (1)

[Claims for Utility Model Registration] (1) A receiving rod arranged on the lower side of the H-shaped steel to support the bottom formwork between the H-shaped steel and the sheet pile, and a receiving rod that slides in the horizontal direction. A front support part having a hanging member for freely supporting the frame and a rear support part detachable from the lower edge of the rear wall of the H-shaped steel are provided, and the front end part is disposed between the hanging member and the rear support part. A support shaft is provided which is longer than the inner dimension of the front and rear walls of the H-shaped steel, which is pivotally connected to the upper end of the hanging member, and whose rear end is pivotally connected to the upper part of the rear support part and extends obliquely upward. Formwork receiving device for backfilling concrete in earth retaining shoring. (2) The formwork receiving device according to claim 1, wherein the support shaft is a turnbuckle.