JPH09217412A - Construction method of grating to trench body and grating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote simplification and efficiency of the process of working and, at the same time, to simplify the construction of a form to reduce a cost and a construction period of time when a concrete form consisting of inside templates and outside templates forming side walls of a trench is erected on a concrete foundation panel, ready mixed concrete is placed on the concrete form to form a U-shaped trench body and a grating is constructed on the surface thereof. SOLUTION: A grating 1 is constructed on inside templates 12, certain parts on both sides are made as projection parts 4, they are projected from the inside templates 12 to set and, at the same time, concrete non-adhesive polystyrene foam liner members 8A and resin plate liner members 8B are provided in parallel with sides 5 and lower surface 6 of the projection parts 4 lengthwise of the projection parts 4 in succession. Then, ready-mixed concrete 16 is placed from the upper part of a concrete form 14 to form side walls 11A and 11b of a trench, and after the solidification thereof, the concrete form 14 is removed, and the molding of a trench body 10 and the construction of the grating 1 are simultaneously carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grating laying method which is fitted on an upper end of a U-shaped groove body and is laid in an upper opening of the groove body, and a grating.

[0002]

2. Description of the Related Art Grating is placed inside a rectangular frame.
It has a basic shape in which bearing materials such as bearing bars are arranged in a grid pattern, and the side walls of the groove are fitted and mounted on the upper end of a groove body made of concrete and having a U-shaped cross section. It is used so that pedestrians can pass through. The grating is laid so that it can be removed from the groove so that cleaning, maintenance, inspection and replacement of the groove can be performed freely.

The above-mentioned method of laying the grating in the groove is performed by the following procedure and method. That is, refer to FIG. 3. First, in forming the groove body 10 in which the grating 1 is laid, the concrete formwork 14 of the left and right groove side walls 11A and 11B of the groove body 10 is replaced with the concrete base 15 which is the bottom of the groove body 10. Stand upright. As the concrete formwork 14, an inner formwork 12 and an outer formwork 13 that surround the both sides of the groove side walls 11A and 11B are provided so as to face each other. A square bar 20 that extends in the direction is nailed, and an angle bar 21 with an anchor bolt is attached to the outer lower corner of the square bar 20 by nailing and attached to the groove side wall 11.
A concrete formwork 14 for placing A and 11B is formed.

Then, the ready-mixed concrete 16 is poured from the upper opening of the concrete form 14, and after the concrete is solidified, the concrete form 14 including the square members 20 is removed with the angle member 21 left, and the inside of the upper end is placed. A pair of groove side walls 11A and 11B having the grating mounting concave groove 9 is formed. Then, the grating 1 is removably fitted into the grating mounting groove 9 and is fitted and mounted.

[0005]

The above-mentioned conventional groove body 10
In the method of forming and the method of laying the grating, since the grating 1 is retrofitted to the groove 10 formed in advance into concrete in a predetermined shape, it becomes a two-step method, and the work process becomes complicated and troublesome. And the groove side wall 11A
Since it is necessary to attach and fix the corner members 20 and the angle members 21 to the concrete formwork 14 in order to provide the groove 9 for mounting the grating in 11B, the concrete formwork 1
The structure of No. 4 becomes complicated, and it takes time and effort to set up the formwork before placing concrete, and the cost increases.

The present invention provides a method of laying a grating on a groove body, which solves the above problems of the prior art, and the grating.

[0007]

According to the present invention for solving the above technical problems, "the left and right groove side walls of a groove body are concrete-cast into a concrete formwork in which an inner mold plate and an outer mold plate are erected upright. Formed, in the upper opening of the groove body, in laying by fitting the grating, the inner template of the concrete formwork is set lower than the pair of outer templates by the height of the grating, While installing the grating on the upper end, slightly on both ends of the grating in the setting posture,
Set to project in the direction of the outer mold plate to be a pair, continuously attach a liner material of non-concrete concrete to the tip surface and the lower surface of the projecting portion, and then pour concrete into the concrete formwork. Forming the groove side wall at the same time, laying a grating on the groove side wall, the method of laying grating on the groove body,

[In a grating which is installed by being installed in the grating mounting groove at the upper ends of the left and right groove side walls of the groove body having a U-shaped cross section, concrete non-adhesive is adhered to the side edge portion which is joined to the groove surface of the grating mounting groove. It is a grating featuring a structure with a liner material attached. The liner material is a foamed resin plate, a non-foamed resin plate, a wood plate, a rubber plate, which has non-concrete adhesiveness.
The liner material that is formed of paper plate / tape or metal plate such as aluminum plate / stainless plate, etc., of which the side line of the grating is attached, is temporarily adhered or hung so that it can be removed after the groove side wall is solidified with concrete. It may be stopped and locked and attached.

[0009]

The above-described method of laying grating of the present invention and the grating used therefor are such that the above-mentioned liner material is added to the side edge portion of the grating that is joined to the groove for mounting the grating on the side wall of the groove formed by pouring concrete. Since it is installed, even if concrete is placed with the grating placed on the concrete formwork, the grating does not adhere to the concrete on the side of the groove, so it can be removed from the groove body, and the side wall of the groove and the grating can be laid. By enabling it at the same time, a series of processes of concrete molding of the groove and laying of the grating can be simplified.

Since the grating with the liner material is simply mounted on the concrete formwork, the conventional square members 20 and angle members 21 are unnecessary, so that the setting work of the concrete formwork is simplified and the efficiency is improved. Can be converted.
If the liner material interposed between the lower surface of the side edge of the grating and the groove for mounting the grating is made to have appropriate pressure resistance and elastic strength, it functions as a cushioning material for the grating in the laid posture.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The method for laying a grating on a groove and the grating according to the present invention are carried out as follows.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A grating laying method and a grating according to an embodiment of the present invention will be described below in detail with reference to FIG. That is, the grating 1 in which the inner side of the frame portion 2 forming a rectangular frame body with the strip material in the vertical direction is partitioned in a lattice shape by the bearing material 3 and the like, the concrete formwork 14 is erected on the concrete base 15. In setting and pouring concrete, a groove body 10 having a U-shaped cross section having groove side walls 11A and 11B is locally formed, and laid on the upper end of the groove body 10, the groove body is formed by the following method / procedure. Grating 1 is laid at the same time as 10 concrete casting.

First, when the concrete formwork 14 consisting of the inner formwork 12 forming the left and right groove side walls 11A and 11B and the outer formwork 13 is set upright on the concrete bed 15, the inner formwork 12 is moved to the outer form. Grating 1 from board 13
The height of the grating 1 is set lower by an amount equivalent to the height H of the grating 1, and a part of the side edge portion of the grating 1 is equidistant from the pair of inner mold plates 12 facing each other toward the outer mold plate 13 forming a pair. Set and set the protruding portion 4 protruding to the.

Then, the protruding portion 4 of the grating 1
On the side surface 5 of the frame portion 2 that comes into contact with the front end surface of the frame portion 2, a liner material 8A made of a Styrofoam thin plate (about 5 m thickness) is attached by adhering it in the longitudinal direction of the frame portion 2 so that it can be easily removed. On the lower surface 6 of the protruding portion 4, a liner material 8B (having a thickness of about 5) made of hard rubber (or made of hard resin) having an appropriate pressure resistance and elastic strength is provided. The grating 1 which is attached in the direction and has the liner materials 8A and 8B is placed and set in the posture described above.

Thereafter, the fresh concrete 16 is poured from the upper openings of the pair of left and right concrete formwork 14 to be solidified, and after the solidification, the concrete formwork 14 is removed and the liner material 8A is removed and placed. Between the solidified groove side walls 11A and 11B and the frame portion 2 of the grating 1,
A corresponding clear lance 17 is provided, and the grating 1 is laid freely in the grating mounting groove 9 at the upper end of the groove body 10.

The embodiment of FIG. 1 described above has the above-mentioned action, and the grating mounting groove 9 of the groove sidewalls 11A and 11B made of concrete is joined to the side edge portion of the grating 1 with the liner material. 1 can be freely removed, and concrete pouring of the groove side walls 11A and 11B and pouring and molding of the groove body 10 can be performed at the same time. Since it is not necessary to provide the square members 20 and the angle members 21 on the concrete form 14, the structure and setting work of the concrete form 14 can be simplified, and the construction period and cost can be reduced.

The grating 1 of the present invention is not limited to the above-mentioned embodiment, and the liner material 8 is formed as an integral body having an L-shaped cross section and is fitted to the corner of the protruding portion of the grating 1 as shown in FIG. Wearable shape or protruding part 4
The liner material 8B attached to the lower surface 6 of the above may be simply affixed with a publicly known adhesive tape, and the liner material 8 may be attached after the formation of the grating 1 and transported to the construction site. Alternatively, the type may be prepared separately from the grating 1 and attached immediately before being placed on the concrete formwork 14.

The liner material 8B attached to the lower surface 6 of the protruding portion 4 is lifted and removed after the groove side walls 11A and 11B are solidified, and the liner material 8B is absent, and the grating 1 is laid. May be, frame 2
When it is necessary to remove the grating 1 while leaving the liner material 8A attached to the side surface 5 of the above, the grating 1 may be lifted and removed as it is,
Further, the liner material 8A may have a shape in which a hooking piece 18 and a pull-up handle 19 which are hooked to the frame portion 2 are provided in a protruding manner as shown in the figure.

[0019]

Industrial Applicability As described above, the method of laying grating in the groove body and the grating of the present invention are the same as those in the case where the groove body is concrete-cast on site using a concrete formwork. This has the effects of simplifying and streamlining the series of processes from casting concrete to laying grating and simplifying the structure of the concrete formwork, thereby shortening the construction period and reducing the construction cost.

[Brief description of drawings]

1A and 1B show a method of laying a grating on a groove and a grating according to an embodiment of the present invention, FIG. 1A is a front view for explaining the procedure / method of the laying method, and FIG. 1B is a perspective view of the grating.

FIG. 2 shows a grating liner material according to another embodiment of the present invention, in which (A), (B) and (C) are partial perspective views thereof.

FIG. 3 is an explanatory view of a procedure and a method of laying a grating on a conventional groove body.

[Explanation of symbols]

 1 grating 2 frame part 3 bearing bar 4 protruding part of grating 5 side surface of protruding part 6 lower surface of protruding part 8A / 8B liner material 9 groove for mounting grating 10 groove body 11A / 11B groove side wall 12 inner template 13 outer template 14 Concrete formwork 15 Concrete base 16 Raw concrete 18 Latching piece 19 Lifting handle

Claims (2)

[Claims] 1. Right and left groove side walls of the groove body are formed by concrete casting on a concrete formwork in which an inner mold plate and an outer mold plate are erected facing each other, and a grating is fitted in an upper opening portion of the groove body. When laying down, the inner template of the concrete formwork is set lower than the pair of outer template by the height of the grating, and the grating is placed on the upper end and both ends of the grating in the set posture are set. Set some of the parts by protruding in the direction of the outer template that forms a pair,
A liner material of non-concrete concrete is continuously attached to the tip surface and the lower surface of the protruding portion, and then concrete is cast into the concrete formwork to form the groove side wall, and at the same time, the groove side wall is grating. A method for laying gratings in a groove, which is characterized by laying. 2. In a grating which is installed by being installed in a grating mounting groove at the upper ends of the left and right groove side walls of a groove body having a U-shaped cross section, concrete non-concrete is provided at a side edge portion which is joined to the groove surface of the grating mounting groove. Grating featuring a structure in which a liner material of adhesive material is attached.