JP2001026975A - Construction method for lining plate for side ditch on farm road - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method for lining plate for side ditch capable of eliminating almost al of reinforcing bar arrangement work, form assembly work, and disassembly and removal works at site and rationalizing the construction works. SOLUTION: This construction method for a lining plate for side ditch on a farm road consists of a process in which a three-dimensional truss 2 with a concrete permanent form in which a concrete board 22 is integrally formed in a lower part of a three-dimensional welded reinforcing bar 21 is spread and provided by inserting a U-shaped bare 3 into the inside of the three-dimensional welded reinforcing bar 21 so as to pull it out in advance and putting both ends of the three-dimensional truss 2 with concrete permanent form on a bridge base 11 of a side ditch 1, a process in which the U-shaped bar 3 is pulled out of the three-dimensional truss 2 with concrete permanent form after spreading and providing the truss 2, a connection process in which a projection 4 is driven and erected in the bridge base 11 on an inner side of a bent part of the U-shaped bar 3, a nd a process in which concrete is placed on the three-dimensional welded reinforcing bar 21 and each three-dimensional truss 2 with concrete permanent form is connected to form the lining plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing a lining plate for a gutter on an agricultural road.

[0002]

2. Description of the Related Art FIG. 4 is a view showing a main part of a conventional method of constructing a gutter lining plate on an agricultural road. In this construction method, first, a formwork is installed so as to be flush with the abutment (11) of the gutter (1). At this time, the form is brought into contact with the inner side surface of the side groove (1) to set the position and the form is not dropped or warped by weight during the work or after the concrete is cast. A support was installed and held between the bottom surfaces of the side grooves (1). After the formwork is installed, the rebar is processed and assembled into an appropriate shape, and the rebar is attached to the abutment (11).
The rebar arrangement work is completed using a number of spacers or the like so as to float at a predetermined height from the surface. Then, concrete is cast so that a lining plate can be formed above the abutment (11) of the gutter (1), and concrete is supplied until the upper surface of the gutter (1) is flush. After the concrete is solidified, first, an operator enters the gutter (1), removes the support, disassemble the formwork, and sequentially places the mold inside the gutter (1). After that, the mold and the support were carried out from the side groove (1) to the outside.

[0003]

However, the method of installing the lining plate for gutters requires a lot of labor and requires a large number of workers, since the assembling work of the formwork and the reinforcing bar reinforcing work are performed on site. Met. Also, after dismantling the formwork, the worker enters the narrow gutter (1) and works, so the workability is very poor. When the mold is carried out in the narrow gutter (1),
They couldn't be used because they couldn't enter the transport equipment, so they had to rely on human power. In particular, since the formwork is large and bulky, it has to be carried out manually to a fixed-length entrance formed with a lining plate, which is a very heavy labor. For this reason, when the length of the lining plate is long, there is a problem in that the lining plate must be divided into a predetermined length and formed without being formed at once.

[0004] The present invention provides a method of installing a lining plate for a gutter on an agricultural road, which can omit a formwork operation, eliminates the need for particularly difficult formwork removal, facilitates on-site work, and streamlines the work. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems. Namely, a) a concrete dumping form in which a concrete slab is integrally formed below a three-dimensional welded reinforcing bar; A three-dimensional truss is prepared, and it can be pulled out from the opening side of the U-shaped reinforcing bar inside the three-dimensional welded reinforcing bar, and both ends of the three-dimensional truss with the concrete dumping formwork are placed and laid on the abutment in the gutter Process and b)
After laying, each U-shaped streak inserted into the three-dimensional truss with the concrete dumping formwork is pulled out, and the U-shaped streak drawing process of bringing the bent portion into contact with the abutment wall surface; A connection process in which a projection such as a concrete anchor or stud bolt is driven into the abutment inside the bent portion of the streak, and d) concrete is cast into the three-dimensional welded rebar, and each concrete dumping mold is laid. Forming the lining plate by integrating the framed space truss.

In the case where a lining plate is installed in a narrow gutter having a narrow abutment, a) a step of driving projections into the abutment on both sides of the gutter at a predetermined pitch and erecting the abutment; (3) a step of preparing a three-dimensional truss with a concrete dumping formwork in which a concrete plate is integrally formed below the reinforcing bars, and placing and laying both ends of the three-dimensional truss with the concrete dumping formwork on an abutment; A long reinforcing bar for connection is placed on the outside of the steel bar, and between the long reinforcing bar and the three-dimensional welded reinforcing bar is fixed with multiple short reinforcing bars by iron wire or welding, and the short reinforcing bar contacts the protrusion And d) a step of casting concrete on the three-dimensional welded reinforcing bar and forming a lining plate by integrating the laid three-dimensional truss with the concrete dumping formwork.

[0007]

1 and 2 are views showing an embodiment of the present invention. First, the numbers in the figures will be described. (1) is a concrete gutter for agricultural roads having an upper opening and a step at the upper edge. In addition, the abutment (11) indicates the lower part of the step provided on the upper edge of the side groove (1). (2) is a three-dimensional truss with a concrete dumping formwork in which concrete is cast into the lower part of a three-dimensional welded reinforcing bar (21) and a concrete slab (22) of a predetermined thickness is integrally formed, which is finished at a factory. Bring to the site. At this time, the thickness from the reinforcing bar required for the concrete structure, that is, the distance from the bottom surface to the lower reinforcing bar, should be at least 3 cm. The three-dimensional truss (2) with the concrete dumping formwork may use the structure of Japanese Patent Application No. 11-169099 proposed by the present inventor. (3) is a connecting U-shaped reinforcing steel bent in a U-shape, and the U-shaped reinforcing bar (3) is connected between the reinforcing bars in the longitudinal direction of the three-dimensional welded reinforcing bar (21) in advance in a factory. It is inserted so that it can be pulled out along. At this time, it is preferable to set the bent portion (31) of the U-shaped streak (3) to the outside and to set the U-shaped streak (3) with elasticity by slightly reducing the opening side thereof. good. (4) is a projection such as a concrete anchor or a stud bolt, and the projection (4) is set inside the bent portion (31) of the U-shaped streak (3) and into the abutment (11). Let me use it.

Next, a method for constructing the gutter lining plate on the agricultural road according to the present embodiment will be described. A U-shaped reinforcing bar (3) is inserted in advance at a factory between the respective reinforcing bars in the longitudinal direction of the three-dimensional welded reinforcing bar (21) so as to be able to be pulled out. First, a) The both ends of the three-dimensional truss (2) with concrete dumping formwork into which the U-shaped reinforcement (3) is inserted are placed and laid on the abutment (11) of the gutter (1). Next, after all the laying work is completed, the U-shaped streak (3) inserted into the three-dimensional truss (2) with concrete dumping formwork is pulled out, and the bent part (31) is applied to the wall of the abutment (11). B) A step of pulling out the U-shaped streak (3) is performed. Then, the inside of the bent portion (31) of the U-shaped streak (3) and the abutment (1
In 1), a projecting object (4) such as a concrete anchor or stud bolt is driven in to stand up. At this time, the projection (4) is not fixed to the U-shaped streak (3) as shown in FIG. Next, concrete is cast on the three-dimensional welded reinforcing bar (21), whereby the laid three-dimensional trusses (2) with the concrete dumping formwork are integrated, and d) the step of forming a lining plate is completed. The protrusion (4) is separated from the U-shaped reinforcing bar (3) and the three-dimensional welded reinforcing bar (21), but with concrete interposed therebetween, the three-dimensional truss with a concrete dumping formwork (2) is connected to the abutment of the gutter (1). The protrusion (4) fixed to (11) and the three-dimensional welded reinforcing bar (2
1) is integrated, and the lining plate is firmly formed on the upper part of the side groove (1). Therefore, the firmly formed lining plate can serve as a farm road.

FIG. 3 is a view showing another embodiment of the present invention, which is a method of constructing a lining plate having a narrow abutment (11) and capable of coping with a conventionally used gutter (1). First, the numbers in the figure will be described. (1) is a concrete gutter for an agricultural road having an open top and an abutment (11) at the upper edge. The gutter (1) has a narrow width of the abutment (11), but is the same as the above embodiment. May be used. In the above embodiment, when the abutment (11) has a narrow side groove (1), the bent portion (31) of the U-shaped streak (3) comes into contact with the projection (4) or the projection (4). (4) may not enter the inside of the bent portion (31). (2) uses the same three-dimensional truss (2) with a concrete dumping formwork as in the above embodiment. (3)
U-shaped streaks are not used. (4) is a projection such as a stud bolt. (5) is a long bar for connection arranged outside the projection (4), and the long bar (5) is arranged in a floating state by bundling. (6) is a short reinforcing bar having one end fixed to a long reinforcing bar (5) and a three-dimensional welded reinforcing bar (21) by an iron wire or welding, and fixed at a predetermined interval and a projection (4). Make sure that it does not touch the device.

Next, a method of constructing a lining plate for a gutter on an agricultural road according to another embodiment will be described. First, a) gutter
(1) A process is performed in which projections (4) such as stud bolts are driven into a narrow abutment (11) on both sides at a predetermined pitch so that the projections (4) are erected. This step may be performed after the installation step described later, or may be performed after connecting the long reinforcing bar (5) by iron wire or welding. B) Concrete is cast at the lower part of the three-dimensional welded reinforcing bar (21) and the concrete plate (2
A step of preparing a three-dimensional truss (2) with a concrete dumping formwork integrally formed with 2) and placing and laying both ends of the three-dimensional truss (2) with a concrete dumping formwork on the abutment (11). I do. Next, (c) a long reinforcing bar (5) for connection is arranged outside the protrusion (4), and the long reinforcing bar (5) is arranged.
A plurality of short reinforcing bars are provided between (5) and the three-dimensional welding reinforcing bar (21).
The connection step of confirming not to come into contact with the protrusion (4) while fixing with iron wire or welding using (6) is completed. And d) a step of casting concrete onto the three-dimensional welded reinforcing bar (21) and integrating the laid three-dimensional trusses (2) with the concrete dumping formwork to form a lining plate. For this reason, after the concrete is solidified, it is not necessary to remove the support and to disassemble the mold and carry out the form and the support from the side groove (1) as in the conventional art.

[0011]

The present invention having the above-described structure has the following effects.

According to the first aspect of the present invention, a) a three-dimensional welded reinforcing bar is provided.
A three-dimensional truss (2) with a concrete disposal form in which a concrete slab (22) is integrally formed at the lower part of the slab is prepared, and a U-shaped reinforcing bar (3) is previously inserted into the three-dimensional welded reinforcing bar (21) so as to be able to be drawn out. Placing the two ends of the three-dimensional truss with concrete dumping formwork (2) on the abutment (11) of the gutter (1) and laying it down; b) After laying, the three-dimensional truss with concrete dumping formwork (2) A U-shaped bar (3) drawn out of the U-shaped bar (3) for bringing the bent portion (31) into contact with the wall surface of the abutment (11); A connecting step of erecting the projections (4) so as not to contact the bars (3), and d) a concrete truss (2) with concrete dumping formwork by casting concrete on the three-dimensional welded reinforcing bar (21). And the step of forming a lining plate, On-site, there is no need for formwork assembling work and rebar arrangement work, so labor can be saved and work can be done with a small number of workers, streamlining construction,
The construction period can be shortened and costs can be reduced. In addition, since it is not necessary to dismantle and remove the formwork, it is necessary for workers to
(1) There is no need to work inside and its narrow gutter
In (1), a large bulky formwork does not have to be manually carried out to an exit of a predetermined length, so that a temporary female worker unsuitable for heavy work can work. Further, even when the lining plate becomes long, it is not necessary to perform the work by dividing the work into a predetermined length as in the related art, so that the work can be completed at once and the work efficiency is dramatically improved.

According to a second aspect of the present invention, the U-shaped reinforcing bar (3) is inserted between the reinforcing bars in the longitudinal direction of the three-dimensional welded reinforcing bar (21) so as to be able to be drawn out, so that the three-dimensional truss (2) with the concrete dumping formwork is connected. And the connection with the side groove (1) is a simple operation of driving the projection (4) into the inside of the bent portion (31) of the U-shaped streak (3) and placing concrete. Further, almost no rework or repair is required at the site, the construction period can be shortened, labor can be saved, and the cost can be reduced as compared with the conventional construction method.

According to the third aspect of the present invention, a) a step of driving projections (4) into the abutments (11) on both sides of the side groove (1) at a predetermined pitch to erect them, and (b) a three-dimensional welded reinforcing bar (21). A step of placing and laying both ends of a three-dimensional truss (2) with a concrete dumping formwork in which a concrete slab (22) is integrally formed at the lower part of the abutment (11); Connecting a long reinforcing bar (5) for connection on the outside and fixing it to the long reinforcing bar (5) and the three-dimensional welded reinforcing bar (21); And the step of forming the lining plate by integrating the laid trusses (2) with the concrete dumping formwork to be laid, whereby substantially the same effect as in claim 1 can be obtained. I can do it. In particular, when the lining plate is installed in the gutter (1) having the narrow abutment (11), the installation can be performed without touching the protrusion (4). Further, since the U-shaped reinforcing bar (3) is not inserted into the three-dimensional welded reinforcing bar (21) of the three-dimensional truss (2) with the concrete dumping formwork, the weight during transportation can be further reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is a plan view showing a main part of the embodiment of the present invention.

FIG. 3 is a plan view showing a main part of another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a main part of a conventional embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gutter 11 Abutment 2 Three-dimensional truss with concrete dumping formwork 21 Three-dimensional welded reinforcing bar 22 Concrete plate 4 Projection 5 Long reinforcing bar 6 Short reinforcing bar

Claims (3)

[Claims] 1. A method for constructing a gutter lining board on an agricultural road, comprising the following steps. B) A three-dimensional truss (2) with a concrete dumping formwork in which concrete is cast into the lower part of the three-dimensional welded reinforcing bar (21) and a concrete plate (22) is integrally formed, and the three-dimensional welded reinforcing bar (21) is provided. Can be inserted from the opening side of the connecting U-shaped reinforcement (3) and can be pulled out.
The process of placing and laying on the abutment (11). B) After laying, pull out the connecting U-shaped streak (3) inserted in the three-dimensional truss with concrete dumping formwork (2), and abut the bent part (31) on the wall of the abutment (11). A step of pulling out a U-shaped streak (3). C) A connecting step in which a projection (4) such as a concrete anchor or a stud bolt is driven into the bent portion (31) of the drawn-out U-shaped bar (3) and into the abutment (11) to be erected. D) Three-dimensional truss (2) with concrete cast-out formwork laid by placing concrete on the three-dimensional welded reinforcing bar (21)
A step of forming a lining plate by being integrated. 2. The three-dimensional welded reinforcing bar (2)
2. The method of claim 1, wherein the lining plate for a gutter on an agricultural road is inserted so as to be able to be drawn out between the reinforcing bars in the longitudinal direction. 3. A method for constructing a lining plate for a gutter on an agricultural road, comprising the following steps. B) A step of driving projections (4) such as stud bolts at a predetermined pitch into the abutments (11) on both sides of the side groove (1) to be erected. B) A three-dimensional truss with a concrete dumping formwork (2), in which concrete is cast under the three-dimensional welding reinforcing bar (21) and a concrete plate (22) is integrally formed, is prepared. A step of placing and laying both ends of 2) on the abutment (11). C) A long reinforcing bar (5) for connection outside the projection (4).
While the long reinforcing bar (5) and the three-dimensional welded reinforcing bar (21) are fixed by using a short reinforcing bar (6) by iron wire or welding, the short reinforcing bar (6) A connection step for confirming that the object (4) does not come into contact with the object (4). D) Three-dimensional truss (2) with concrete cast-out formwork laid by placing concrete on the three-dimensional welded reinforcing bar (21)
A step of forming a lining plate by being integrated.