JP2001131956A - Mounting structure of permanent form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of permanent form capable of vertically setting a form to an inclined or distorted steel sheet pile and never limiting the fixing position of a metal fitting. SOLUTION: This mounting structure comprises a bottom plate 3 fixed to the front surface of a steel sheet pile 1, a positioning member 4, brackets 5 and 5, a horizontal beam 6 mounted on the brackets 5 and 5 with a small distance from the steel sheet pile 1, a vertical metal fitting 8 fixing to the horizontal beam 6 with an equal space, and a grating reinforcement 12 arranged on the outside of the steel sheet pile 1. A permanent form 14 is placed on the bottom plate 3 to allow the form reverse side to abut on the surface of the vertical metal fitting 8, the clearance between the permanent forms 14 and 14 is covered with a cover plate 14, and a bolt 17 is inserted to the clearance part of the form to fix the permanent form 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for preventing and reinforcing a steel structure such as a steel sheet pile using a permanent formwork.

[0002]

2. Description of the Related Art Conventionally, as a countermeasure against corrosion of a steel sheet pile, generally, an FRP cover having irregularities along its shape is attached to the sea side of the steel sheet pile with metal fittings, and the cover is filled with mortar and solidified. . However, an actual steel sheet pile has a large amount of distortion and inclination, which makes it difficult to align it with the uneven cover, and the uneven cover has the disadvantage of increasing the material and manufacturing costs.

[0003] For this reason, in recent years, a structure that can be easily attached to irregular steel sheet piles using a flat cover instead of unevenness has become widespread. Furthermore, since the FRP cover and the internal mortar have inevitably poor adhesion, to improve this, the cover itself is made of a concrete formwork, or two layers of FRP and concrete are prepared in advance, and a number of layers are formed between the formwork and the structure. Permanent forms for placing rebar have also appeared.

On the other hand, as a means for attaching a flat cover to a steel sheet pile, first, a plurality of studs or brackets are welded to the front face of a steel sheet pile as in Japanese Patent Application Laid-Open No. 60-159061, and after the cover is attached to this, There is a method of tightening with a nut from the outside. Second, Japanese Patent Laid-Open No. 57-137
No. 529, there is a method of welding a vertically long T-shaped bracket or hook to a steel sheet pile and dropping a concrete formwork from above onto the T-shaped bracket to fix it.

[0005] However, flat covers and molds have a disadvantage that the mortar pressure is large because the mortar filling amount is larger than that of the uneven cover, so that the resin cover is deformed or the hook portion is detached by the hook method. In addition, when a cover or a formwork is attached to a steel sheet pile that is distorted or tilted back and forth and left and right in the above-described manner, the formwork itself remains inclined. Furthermore, in the first method, it is necessary to make a hole in the cover, and in the second method, a gap is formed without the dropped formwork being in close contact with the T-shaped fitting,
If it is forcibly fixed, the concrete form will crack.
In addition, the second method removes the formwork from above, so it is effective for new construction. However, it cannot be applied to the existing steel sheet pile on which concrete is piled.

[0006] Japanese Patent Application Laid-Open No. 9-279568 discloses a structure that can increase the mounting strength of the permanent formwork and can cope with distortion in the longitudinal and lateral directions of the steel sheet pile. In the present invention,
After adjusting the metal fittings in each direction, the permanent form can be arranged vertically, and bolts are fixed through the gaps of the form, so that there is no need to make holes in the form.

[0007]

However, since this type of formwork is manufactured in a factory in a fixed size in advance, the positions of the metal fittings for fixing both ends of the formwork are also determined. There is a disadvantage that the position of the bracket is shifted laterally and cannot be attached to the convex portion of the steel sheet pile. JP-A-4-2653
In the mounting structure of No. 07, a horizontal beam is welded to the convex part of the steel sheet pile so that the bracket can be fixed anywhere.
In the first place, it is extremely difficult to weld a straight horizontal beam because the convex part of the steel sheet pile that is distorted and inclined is not straight.

The present invention has been made in view of the above circumstances, and has as its object to mount a permanent formwork in which a formwork can be installed vertically on a tilted or distorted steel sheet pile and the position of a bracket is not restricted. It is to provide a structure.

[0009]

In order to achieve the above object, the mounting structure of the present invention has a bottom plate and a beam receiver fixed to the front surface of a steel sheet pile or the like, and is attached to the beam receiver a little away from the steel sheet pile. A horizontal beam, a vertical fitting fixed to the horizontal beam, a reinforcing bar arranged outside the steel sheet pile, a permanent form placed on the bottom plate and in contact with the surface of the vertical fitting, and a permanent form. It comprises a cover plate that covers the gap, and a fastening member that fixes the boundary of the permanent form between the vertical fitting 8 and the cover plate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2 and 3 are a plan view, a partially cutaway front view and a side view of a permanent form mounting structure to which the present invention is applied. A bottom plate 3 for supporting the formwork is welded below the stud dowel 2 and the steel sheet pile 1 in order to enhance the adhesion with the steel sheet pile 1.

A positioning member 4 using angle steel and a pair of beam receivers 5 and 5 are alternately welded to the front surface of the convex portion of the steel sheet pile 1. The positioning member 4 is attached to the center of the projection, and the beam receivers 5 and 5 are attached to both sides of the projection. Further, as can be seen from FIG. 2, a plurality of beam receivers 5a and 5a are provided in the middle of the steel sheet pile 1. On the positioning member 4 and the beam receivers 5, 5, two horizontal beams 6 made of H steel are vertically arranged, and the horizontal beams 6 are fixed to the beam receivers 5, 5 slightly apart from the steel sheet pile 1. . Square holes 7 are formed at regular intervals in the horizontal beam 6,
The mortar to be filled later spreads up and down through the square holes 7.

Outside the horizontal beam 6, a vertical metal fitting 8 made of H steel is provided.
Are welded at regular intervals, and the positions of the vertical fittings 8 correspond to every other projection of the steel sheet pile 1. A plurality of holes 9 (FIG. 2) for passing bolts and nuts 10 are provided vertically outside the vertical metal fittings 8, and small beams 11 are formed on both sides of the middle portion of the metal fittings 8, and the lower surface of the small beams is a beam. It is supported by receivers 5a, 5a. On the sea side of the horizontal beam 6, a lattice reinforcing bar 12 for reinforcing the mortar is arranged substantially in parallel, and both ends of the reinforcing bar 12 are connected to a web portion of the vertical fitting 8 via a connection plate 13.

On the surface of the vertical fitting 8, permanent molds 14, 14 are provided.
Are in contact with a gap, and the lower end of the formwork 14 is supported by the bottom plate 3. It is desirable that the permanent form 14 is formed in a predetermined size by filling FRP with concrete in advance at a factory. The gap between the mold frames 14 is covered with an elongated resin cover plate 15, and is fixed from outside with a washer 16, a bolt 17, and a nut 10 of the vertical fitting 8.

Next, the order of mounting the permanent formwork 14 will be described. First, the stud dowel 2 is inserted into the recess of the steel sheet pile 1.
The bottom plate 3 is fixed to the submerged portion, and the positioning member 4 is horizontally welded to the steel sheet pile 1 at every other convex portion by using an instrument.

Next, the vertical brackets 8 are welded to the two horizontal beams 6 at regular intervals, assembled in a grid, and lifted by a crane.
The upper and lower horizontal beams 6 are placed on the positioning member 4, and the horizontal of the beams 6 and the vertical direction of the metal fittings 8 are adjusted. At this time, by positioning the horizontal beam 6 slightly away from the steel sheet pile 1 so as not to hit it, even if the steel sheet pile is distorted, the deviation in each direction can be corrected. In this state, the rear ends of the beam receivers 5 and 5 are welded to the convex portions of the steel sheet pile, and the front end is welded to the lower surface of the horizontal beam 6. In addition, it is desirable that the beam receivers 5a, 5a be fixed to the middle part of the steel sheet pile, and the small beams 11 of the vertical metal fittings 8 be placed thereon to distribute and support the weight of the entire metal fittings.

Next, the lattice reinforcing bars 12 provided with connection plates 13 at both ends are arranged substantially in parallel with the steel sheet pile 1, and the ends of each plate 13 are welded to the web portion of the vertical fitting 8. In the case of using a formwork in which a lattice reinforcing bar is buried in advance, this reinforcing work can be omitted.

Next, the mold 14 is placed on the bottom plate 3 while being suspended in a well-balanced manner by a crane and a rope (not shown).
The inside of both ends of 4 is brought into contact with the front surface of the vertical fitting 8. Subsequently, the boundary surfaces of the molds 14, 14 are covered with a cover plate 15, and bolts 17 are passed through the nuts 10 of the metal fittings 8 via washers 16 and fastened. Since the vertical fittings 8 are fixed to the horizontal beam 6 at equal intervals regardless of the distortion of the steel sheet pile 1, the nuts 10 and the bolts 17 of the fittings always coincide with each other, so that the conventional displacement does not occur. Further, the bolts 17 are fixed to the formwork 14,14.
Therefore, there is no need to provide a bolt hole in the mold itself.

When the mounting of each formwork 14 is completed, a mortar (not shown) is filled between the steel sheet pile 1 and the formwork 14. Since the horizontal beam 6 is provided with the square hole 7, the beam 6 does not hinder the inflow of mortar. Since the mortar is combined with the stud dowel 2, the beam 6, the metal fitting 8, the reinforcing bar 12, and the concrete layer on the inner surface of the formwork, the mortar does not peel off from the formwork 14 or the steel sheet pile 1 even if there is an external impact.

In the above embodiment, the positioning member 4 is temporarily fixed to the steel sheet pile 1 in order to facilitate the work of attaching the beam and the bracket, but the beam receivers 5, 5 are welded in a horizontal state from the beginning. , Member 4 can be omitted.
When the height difference between the seas is large and the vertical dimension of the mold is large, the mold 14 may be mounted in two or three steps.

[0020]

As described in detail above, according to the permanent form mounting structure of the present invention, the same size form can be installed vertically even with a steel sheet pile having a large inclination or distortion, and the mounting position of the metal fittings Has the effect of not being restricted.

[Brief description of the drawings]

FIG. 1 is a plan view of a mold mounting structure.

FIG. 2 is a front view in which a part of a mold is cut away.

FIG. 3 is a side view of the form mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel sheet pile 3 Bottom plate 5 Beam support 6 Horizontal beam 8 Vertical fitting 10 Nut 12 Grid reinforcement 14 Permanent formwork 15 Cover plate 17 Bolt

Claims (1)

[Claims] 1. A bottom plate 3 and beam receivers 5, 5 fixed to the front surface of a steel sheet pile 1 or the like, and beam receivers 5, 5 slightly apart from the steel sheet pile 1.
A horizontal beam 6 attached to the horizontal beam 6, a vertical fitting 8 fixed to the horizontal beam 6, and a reinforcing bar 12 disposed outside the steel sheet pile 1;
A permanent mold 14 placed on the bottom plate 3 and abutting against the surface of the vertical metal fitting 8, a cover plate 15 covering the gap between the permanent molds 14, 14, and a vertical metal fitting 8
Fastening members 10, 1 fixed between the cover plate 15 and the
7. A mounting structure for a permanent formwork comprising: