JP2017014861A - Permanent mold installation jig, and permanent mold installation method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance installation work efficiency of permanent mold, and enable the permanent mold to be installed readily even when a space from a steel sheet pile installed on a rear surface side is narrow.SOLUTION: A permanent mold installation jig includes: a frame installed in front of a steel sheet pile installed at a construction site where concrete is cast; and panel fixing metal fittings fixed at a plurality of locations on support posts constituting the frame and each having a through-hole for bolt fixing through which a bolt is pierced from the steel sheet pile side, the bolt being fastened on a rear surface of a rectangular mold panel positioned on a surface of the frame on a side opposite the steel sheet pile. The jig fixes a plurality of mold panels that have been laid continuously next to each other.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a jig for constructing a residual formwork which is installed on a concrete placement site and remains on the surface of the concrete even after the concrete placement, and a method for constructing a residual formwork using the jig. Is.

  When constructing sabo dams and hillside dams or river quays, formwork is placed before placing concrete. As such a formwork, a remaining formwork that remains on the surface of the concrete even after it has been placed and serves as a decorative surface of the work is generally used.

  The remaining formwork is usually constructed by arranging rectangular formwork panels having a certain size from below. Each formwork panel is fixed to an installation place by a supporting rebar called a separator, and adjacent formwork panels are connected by a predetermined metal fitting. Examples of metal fittings that connect formwork panels include one in which the corners of four formwork panels are fixed with one metal fitting and a separator is welded to the metal fittings (see Patent Document 1). .)

Japanese Patent Laying-Open No. 2015-86564 JP 2009-250021 A

  In the remaining formwork construction method in which the formwork panels are arranged, the work of aligning the formwork panels, connecting the formwork panels, welding the separators to the formwork panels and the fittings, and fixing the separators in place It was necessary to do. Therefore, it took a long time to construct the formwork panel.

  As a method to improve the construction efficiency of the remaining formwork, install a concrete frame with multiple window frames first, and fit and fix the formwork panel to the window frame of the frame from the back side It has been proposed to construct a remaining formwork (see Patent Document 2).

  In construction of river quays, etc., it is common to install steel sheet piles that prevent collapse of natural ground, and to construct the remaining formwork in front of the steel sheet piles. In such a case, there is no space for people to enter, and in such a case, construction by a method of fitting the formwork panel from the back side of the frame is impossible. Also, concrete frames are heavy and need to be installed using heavy machinery.

  Therefore, the present invention improves the construction efficiency of the remaining formwork and allows the remaining formwork to be easily installed even if the space between the steel sheet pile installed on the back side is narrow. It is intended to do.

  The residual mold construction jig according to the present invention is a frame steel that is fixed at a plurality of positions of a frame installed in front of a steel sheet pile installed at a site where concrete is placed and a column constituting the frame. A panel fixing bracket having a bolt fixing through hole for allowing a bolt fastened to the back surface of a rectangular formwork panel disposed on the surface opposite to the sheet pile from the steel sheet pile side, and a plurality of formwork The panels are fixed in a continuous state.

  The residual formwork construction method according to the present invention is a method for installing the residual formwork by installing the above-mentioned residual formwork construction jig in front of a steel sheet pile installed at a site where concrete is placed and welding the supporting rebar. Bolts for securing the formwork panel by placing the formwork panel on the surface opposite to the steel sheet pile of the remaining formwork construction jig secured to the steel sheet pile and the process of fixing the jig to the steel sheet pile Through the through-hole provided in the panel fixing bracket from the steel sheet pile side, and fastening the bolt to the formwork panel to fix the formwork panel to the remaining formwork construction jig. .

  The remaining formwork construction jig according to the present invention is a metal and ladder-like or lattice-like frame installed in front of a steel sheet pile, and is provided at a plurality of positions of the frame, and is opposite to the steel sheet pile of the frame. And a panel fixing bracket having a bolt fixing through hole through which a bolt fastened to the back surface of a rectangular formwork panel arranged on the surface of the steel sheet pile passes, and a plurality of formwork panels are connected to each other. Since it is fixed in the state, a plurality of formwork panels can be installed on the frame without an operator entering between the frame and the steel sheet pile. Since a plurality of formwork panels are fixed to the frame by fastening bolts after the frame is first installed at the remaining formwork construction position, the installation of the formwork panels becomes easy and the construction efficiency of the remaining formwork Can be improved.

  Moreover, since the frame is made of metal, one end of the supporting reinforcing bar can be welded to an arbitrary position, and can be fixed to the steel sheet pile by the supporting reinforcing bar. Therefore, it becomes easy to install the frame at the construction site of the remaining mold. In addition, since the metal frame is lighter than the concrete frame, a frame that can be transported manually can be constructed. In this case, the remaining mold can be constructed without using heavy machinery.

  In the remaining formwork construction method according to the present invention, after fixing the residual formwork construction jig to the steel sheet pile, the formwork panel is placed on the surface opposite to the steel sheet pile of the residual formwork construction jig. Place the formwork panel on the formwork panel by passing the bolts for placing and fixing the formwork panel from the steel sheet pile side through the through holes provided in the panel fixing bracket and fastening the bolts to the formwork panel. Since it is fixed to the jig, the formwork panel can be efficiently installed without an operator entering between the frame and the steel sheet pile.

It is a perspective view which shows one Example of the jig | tool for residual formwork construction. It is the perspective view which looked at the panel fixing metal fitting in the Example from the back side. It is the perspective view seen from the back side when one formwork panel is attached to the jig | tool for residual formwork construction of the Example. It is a figure for demonstrating the construction procedure of a residual formwork, Comprising: It is a perspective view which shows the state before installing the jig | tool for residual formwork construction. It is a figure for demonstrating the construction procedure of a residual formwork, Comprising: It is a perspective view which shows the state which installed the jig | tool for residual formwork construction in front of the steel sheet pile. It is a figure for demonstrating the construction procedure of a residual formwork, Comprising: It is a perspective view which shows the state which installs a formwork panel in the jig | tool for residual formwork construction installed ahead of the steel sheet pile.

  In the remaining formwork construction jig according to the present invention, a formwork panel is used in which female screws for fastening bolts are formed at the four corners of the back surface, and the panel fixing bracket is composed of four formwork panels. It is preferable that the corner portions are fixed while being connected. If it does so, the connection between the adjacent formwork panels will be made easily.

  Hereinafter, an embodiment of a residual mold construction jig (hereinafter referred to as a jig) and a residual mold construction method using the jig according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the jig 2 of this embodiment includes a ladder-shaped frame 3 and a plurality of positions of the support columns 4 provided horizontally among the support columns 4 constituting the frame 3. Panel fixing brackets 6 are provided at intervals. The frame 3 is made of steel, and the panel fixing bracket 6 is fixed to one surface of the frame 3 by welding. The surface of the jig 2 on which the panel fixture 6 is provided is the front surface, and the opposite surface is the back surface.

  As shown in FIG. 2, the panel fixing bracket 6 is provided with four through holes 8. As shown in FIG. 3, the through-hole 8 allows a bolt 12 for fixing the mold panel 10 to the front side of the jig 2 to penetrate from the back side of the jig 2. The formwork panel 10 fixed to the jig 2 has a rectangular shape, and female screws (not shown) for fastening the bolts 12 are formed at the four corners of the back surface. The formwork panel 10 is fixed to the jig 2 so that the surface thereof faces away from the steel sheet pile 14. The formwork panel 10 has, for example, a width dimension of 500 mm, a length dimension of 500 mm, a thickness dimension of 40 mm, and a weight of about 18 kg.

  One formwork panel 10 is fixed to the frame 3 by bolts 12 that pass through the through holes 8 of the four panel fixtures 6. The corners of the four formwork panels 10 are fixed to one panel fixing bracket 6 in a continuous state without any gap therebetween, thereby connecting adjacent formwork panels 10. The With this structure, the operator can hold the mold panel 10 on the front side of the jig 2 and reach the back side and fix it with the bolts 12 without going around the back side of the jig 2.

  The size of the frame 3 is, for example, about 2 m in both height and width. As each support | pillar 4 of the flame | frame 3, a cross-sectional shape can use a L-shaped, U-shaped thing, or a hollow prism. Thereby, the weight of the jig 2 as a whole is about 43 kg. Thereby, the operator can carry the jig 2 or install it on the site without using heavy machinery.

  A through hole 20 is provided on the side surface of the frame 3 of each jig 2 to allow a tension bolt for connecting two adjacent jigs 2 to pass therethrough. Before fixing each jig 2, it is easy to arrange each jig 2 on the same straight line by tensioning between adjacent jigs 2 with a tension bolt, and it becomes easy to construct the remaining formwork straightly. .

  Next, a method for constructing the remaining mold using the jig 2 of the above embodiment will be described with reference to FIGS.

  As FIG. 4 shows, the jig | tool 2 is arrange | positioned ahead of the steel sheet pile 14 installed in order to prevent the collapse of a natural ground. First, the attachment angle 16 is attached to the position of the reference height in front of the steel sheet pile 14 by welding. The reference height is a height for holding the jig 2 at a predetermined height by the mounting angle 16. The mounting angle 16 is for temporarily fixing the jig 2 by holding the frame 3 at a predetermined height.

  Next, the jig 2 is adjusted so that the front surface of the jig 2 faces away from the steel sheet pile 14 and the post of the frame 3 is hooked on the mounting angle 16 so that the jig 2 is arranged in the vertical direction. The tip end of 16 is welded to the column 3 and temporarily fixed. When a plurality of jigs 2 are installed side by side, after the first jig 2 is installed at a reference position, the next jig 2 is aligned with respect to the jig 2 and then the mounting angle is set. 16 is temporarily fixed by welding. As an alignment method, among the panel fixing brackets 6 provided in the jig 2 temporarily fixed first, the panel fixing bracket 6 at the end of the jig 2 side to be temporarily fixed next is attached to the panel fixing bracket 6. There is a method in which one end side is attached and the panel fixture 6 of the next jig 2 is attached to the other end side of the formwork panel 10. By performing the alignment of the adjacent jigs 2 using the mold panel 10, it is possible to prevent problems when the mold panel 10 is attached due to a dimensional error of the jig 2 or a positional deviation of the jig 2. .

  After temporarily fixing the required number of jigs 2 by the above method, as shown in FIG. 5, one end of the supporting rebar 18 is welded to the column 3 and the other end is welded to the steel sheet pile 14. To fix the book. The other end of the supporting reinforcing bar 18 can be fixed by using the unevenness of the steel sheet pile 5 and welding the other end of the supporting reinforcing bar 18 to the side surface of the convex portion of the steel sheet pile 5. Since each column 4 of the frame 3 is made of steel, one end of the supporting rebar 18 can be welded to an arbitrary position of the column 4, and the jig 2 can be easily fixed to the steel sheet pile 5.

  After all the jigs 2 are fixed to the steel sheet piles 14, as shown in FIG. 6, the form panel 10 is attached to each jig 2 from below. When attaching the formwork panel 10, the operator extends the hand to the back side and fastens the bolt 12 while pressing the formwork panel 10 on the front side of the jig 2 without going around the back side of the jig 2. Can do. Therefore, even when there is no space for a person to enter between the steel sheet pile 14 and the jig 2, the remaining formwork can be easily constructed.

  The frame 3 of the jig 2 described above has a plurality of pillars arranged in a horizontal direction in a ladder shape, but the present invention is not limited to this, and a plurality of pillars arranged in the vertical direction. The pillar may have a ladder shape, or may have a plurality of pillars orthogonal to each other in a lattice shape.

2 Remaining formwork jig 3 Frame 4 Support 6 Panel fixing bracket 8 Through hole 10 Formwork panel 12 Bolt 14 Steel sheet pile 16 Mounting angle 18 Supporting rebar

Claims (3)

A metal and ladder-like or lattice-like frame installed in front of a steel sheet pile installed at the site where concrete is placed;
Bolts fixed to a plurality of positions of the pillars constituting the frame and fastened to the back surface of a rectangular formwork panel disposed on a surface opposite to the steel sheet pile of the frame are penetrated from the steel sheet pile side. A panel fixing bracket having through holes for fixing bolts, and
A remaining formwork construction jig for fixing a plurality of formwork panels in a state of being continuous with each other. Female screws for fastening the bolts are formed at the four back corners of the mold panel,
The said panel fixing metal fitting is a jig | tool for residual formwork construction of Claim 1 which fixes, connecting the corner | angular part of four formwork panels. The residual formwork construction jig according to claim 1 or 2 is installed in front of a steel sheet pile installed at a site where concrete is placed, and the residual formwork construction jig is attached to the steel by welding a supporting rebar. Fixing to the sheet pile;
The formwork panel is arranged on the surface opposite to the steel sheet pile of the remaining formwork construction jig fixed to the steel sheet pile, and a bolt for fixing the formwork panel is provided from the steel sheet pile side. Passing the through hole provided in the panel fixing bracket and fastening the bolt to the formwork panel to fix the formwork panel to the remaining formwork construction jig. Construction method.

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