JP3874576B2

JP3874576B2 - Construction method of gutter lining plate on farm road

Info

Publication number: JP3874576B2
Application number: JP20134799A
Authority: JP
Inventors: 勝人吉牟禮
Original assignee: 近藤鋼材株式会社
Priority date: 1999-07-15
Filing date: 1999-07-15
Publication date: 2007-01-31
Anticipated expiration: 2019-07-15
Also published as: JP2001026975A

Description

【０００１】
【発明の属する技術分野】
本発明は農道に於ける側溝用覆工板の施工方法に関する。
【０００２】
【従来の技術】
図４は従来の農道に於ける側溝用覆工板の施工方法の要部を示す図である。この施工方法は、先ず側溝(１)の橋台（11）と面一になるように、型枠を設置する。この時、前記型枠は側溝(１)の内側面に接触させて位置設定すると共に前記型枠が作業中やコンクリート打設した後、重量で落下したり反ったりしないように、前記型枠と側溝(１)の底面の間に支持具を設置させて保持していた。前記型枠が設置された後、鉄筋を加工して適宜な形状に組立てると共にその鉄筋が橋台（11）面から所定高さ浮くように多数のスペーサーなどを使用して鉄筋配筋作業を終了させる。そして側溝(１)の橋台（11）より上に覆工板が形成出来るようにコンクリート打設して側溝(１)の上面が面一になるまでコンクリートを供給する。コンクリートの固化後は、先ず始めに、作業者が側溝(１)の中に入って支持具を外し、更に型枠を分解して側溝(１)内部に順次置いて行く。その後、型枠や支持具を側溝(１)から外部へ搬出させていた。
【０００３】
【発明が解決しようとする課題】
しかしながら前記側溝用覆工板の施工方法は現場に於いて、型枠の組立作業や鉄筋配筋作業が行われるため、手間が掛ると共に多くの作業員が必要であった。また型枠の解体後、作業者が狭い側溝(１)の中に入って作業するため、非常に作業性が悪く、狭い側溝(１)の中に入って型枠を搬出する際は、運搬機械などが入らないのでそれらは使用出来ず、人力に頼るしかなかった。特に型枠は大きく嵩ばるため、覆工板が施工されて形成した一定長さの出入口まで人力で運び出さなければならず、大変な重労働であった。このため覆工板が長くなると、一気に形成させずに、所定長さに区切って施工しなければならない等の問題点があった。
【０００４】
本発明は型枠作業が省略でき、特に大変である型枠撤去が不要となって現場作業が容易で且つ施工の合理化が図れる農道に於ける側溝用覆工板の施工方法を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記問題点を解決するために本発明は成されたものであり、つまり、イ）縦筋，横筋，ウエブ筋が組合わされて形成する立体溶接鉄筋と、その下部にコンクリート打設して一体に形成されたコンクリート版とから成るコンクリート捨て型枠付き立体トラスを用意すると共に立体溶接鉄筋の内部に、接続用のＵ字筋の開口側から引出し可能に成し、そのコンクリート捨て型枠付き立体トラスの両端を、側溝の橋台に載置して敷設する工程と、ロ）敷設後、コンクリート捨て型枠付き立体トラスに差し込まれていた各Ｕ字筋を引出し、その折曲部を橋台の壁面に当接させるＵ字筋の引出し工程と、ハ）引出された各Ｕ字筋の折曲部の内側で且つ橋台に、コンクリートアンカーやスタッドボルトなどの突起物を打込んで立設させる接続工程と、ニ）立体溶接鉄筋の上方からコンクリート打設し、敷設された各コンクリート捨て型枠付き立体トラスが一体化されて覆工板を形成する工程とから構成する。
【０００６】
又、橋台の幅が狭い側溝に覆工板が施工される場合には、イ）側溝の両側の橋台に突起物を所定ピッチで打込んで立設させる工程と、ロ）縦筋，横筋，ウエブ筋が組合わされて形成する立体溶接鉄筋と、その下部にコンクリート打設して一体に形成されたコンクリート版とから成るコンクリート捨て型枠付き立体トラスを用意し、そのコンクリート捨て型枠付き立体トラスの両端を、橋台に載置して敷設する工程と、ハ）突起物の外側に接続用の長尺な鉄筋を配置し、且つ該長尺な鉄筋 ( ５ ) に一端が鉄線や溶接などで固定されると共に他端が前記立体溶接鉄筋（ 21 ）に固定される連結用の短い鉄筋（６）を用いて、前記長尺な鉄筋 ( ５ ) と前記立体溶接鉄筋（ 21 ）を固定しながら、その連結用の短い鉄筋が突起物に接触しないように確認する接続工程と、ニ）立体溶接鉄筋の上方からコンクリート打設し、敷設された各コンクリート捨て型枠付き立体トラスが一体化されて覆工板を形成する工程とから構成する。
【０００７】
【発明の実施の形態】
図１、図２は本発明の実施形態を示す図であり、先ず始めに図中の番号について説明する。(１)は上方が開口され且つ上縁に段差を有した農道用のコンクリート製の側溝である。尚、橋台（11）は側溝(１)の上縁に設けた段差の下段部を指す。（２）は縦筋，横筋，ウエブ筋が組合わされて形成する立体溶接鉄筋（ 21 ）と、その下部にコンクリート打設して一体に形成された所定厚さのコンクリート版 (22) とから成るコンクリート捨て型枠付き立体トラスであり、これは工場で仕上げたものを現場に持ち込む。尚、この時、コンクリート構造物で必要な鉄筋からの厚さ分、つまり、底面から下方の鉄筋までの距離を３cm以上確保しておく。又、前記コンクリート捨て型枠付き立体トラス（２）は本発明者が提案した特願平１１−１６９０９９号の構造のものを利用すれば良い。（３）はコンクリート鉄筋をＵ字状に折曲した接続用のＵ字筋であり、該Ｕ字筋（３）は予め工場に於いて、立体溶接鉄筋（21）から引出し可能に差し込んでおく。この時、Ｕ字筋（３）の折曲部（31）が外側に来るようにセットすると共にＵ字筋（３）の開口側を若干縮めて弾性を持たせた状態でセットしておくと良い。（４）はコンクリートアンカーやスタッドボルトなどの突起物であり、該突起物（４）はＵ字筋（３）の折曲部(31)の内側で且つ橋台（11）に打込んで立設させて使用する。
【０００８】
次に本実施形態の農道に於ける側溝用覆工板の施工方法について説明する。予め工場でＵ字筋（３）を立体溶接鉄筋（21）から引出し可能に差し込んでおく。先ず始めに、イ）Ｕ字筋（３）を差し込んだコンクリート捨て型枠付き立体トラス（２）の両端を、側溝(１)の橋台（11）に載置して敷設する。次に全ての敷設作業が完了後、コンクリート捨て型枠付き立体トラス（２）に差し込まれていたＵ字筋（３）を引出し、その折曲部（31）を橋台（11）の壁面に当接させるロ）Ｕ字筋（３）の引出し工程を行う。そして、Ｕ字筋（３）の折曲部(31)の内側で且つ橋台（11）に、コンクリートアンカーやスタッドボルトなどの突起物（４）を打込んで立設させる
ハ）接続工程が行われる。この時、図２のように突起物（４）はＵ字筋（３）と固定されていない状態である。次に立体溶接鉄筋（21）の上方からコンクリート打設することにより、敷設された各コンクリート捨て型枠付き立体トラス（２）が一体化されてニ）覆工板を形成する工程が終了するのである。前記突起物（４）はＵ字筋（３）及び立体溶接鉄筋（21）と離れているが、コンクリートを介在して、コンクリート捨て型枠付き立体トラス（２）は、側溝(１)の橋台（11）に固定した突起物（４）と立体溶接鉄筋（21）が一体化され、側溝(１)の上部に覆工板が強固に形成される。従って、強固に形成された覆工板は農道としての役割が果たせるものとなるのである。
【０００９】
図３は本発明の別実施形態を示す図であり、これは狭い橋台（11）を有した従来よく使用された側溝(１)に対応可能な覆工板の施工方法である。先ず始めに図中の番号について説明する。(１)は上方が開口され且つ上縁に橋台（11）を有した農道用のコンクリート製の側溝であり、この側溝(１)は橋台（11）の幅が狭いが、前記実施形態と同一のものを用いても良い。尚、前記実施形態に於いて、橋台（11）の幅が狭い側溝(１)を用いると、Ｕ字筋（３）の折曲部(31)と突起物（４）が接触或いは該突起物（４）が折曲部(31)の内側に入らない場合が発生する。（２）は前記実施形態と同一のコンクリート捨て型枠付き立体トラス(２)を用いる。（３）のＵ字筋は用いない。（４）はスタッドボルトなどの突起物である。（５）は突起物（４）の外側に配置した接続用の長尺な鉄筋であり、該長尺な鉄筋(５)は束だてによって浮いた状態で配置されている。（６）は長尺な鉄筋(５)と立体溶接鉄筋（21）に一端ずつを鉄線や溶接などで固定させて連結した短い鉄筋であり、これは所定間隔に固定すると共に突起物（４）に接触しないように確認して配置する。
【００１０】
次に別実施形態の農道に於ける側溝用覆工板の施工方法について説明する。先ず始めにイ）側溝(１)両側の幅の狭い橋台（11）にスタッドボルトなどの突起物（４）を所定ピッチで打込んで突起物（４）が立設される工程を行う。尚、この工程は後述する設置工程の後に行っても良く、或いは長尺な鉄筋(５)を鉄線や溶接などで連結した後に行っても良い。ロ）縦筋，横筋，ウエブ筋が組合わされて形成する立体溶接鉄筋（ 21 ）と、その下部にコンクリート打設して一体に形成されたコンクリート版 (22) とから成るコンクリート捨て型枠付き立体トラス（２）を用意し、そのコンクリート捨て型枠付き立体トラス（２）の両端を、前記橋台（11）に載置して敷設する工程を行う。次にハ）前記突起物（４）の外側に接続用の長尺な鉄筋(５)を配置し、且つ該長尺な鉄筋 ( ５ ) に一端が鉄線や溶接などで固定されると共に他端が前記立体溶接鉄筋（ 21 ）に固定される連結用の短い鉄筋（６）を用いて、前記長尺な鉄筋 ( ５ ) と前記立体溶接鉄筋（ 21 ）を固定しながら、その連結用の短い鉄筋（６）が前記突起物（４）に接触しないように確認する接続工程が終了する。そしてニ）前記立体溶接鉄筋（21）の上方からコンクリート打設し、敷設された各コンクリート捨て型枠付き立体トラス（２）が一体化されて覆工板を形成する工程を行う。このため、コンクリートの固化後は、従来の如き支持具を外したり、型枠を分解して側溝(１)から型枠や支持具を搬出させたりする作業は不要となるのである。
【００１１】
【発明の効果】
本発明はこのように構成させたことにより、下記に記載する効果を有する。
【００１２】
請求項１のようにイ）縦筋，横筋，ウエブ筋が組合わされて形成する立体溶接鉄筋（ 21 ）と、その下部にコンクリート打設して一体に形成されたコンクリート版 (22) とから成るコンクリート捨て型枠付き立体トラス（２）を用意すると共に前記立体溶接鉄筋（21）の内部にＵ字筋（３）を引出し可能に予め差し込み、そのコンクリート捨て型枠付き立体トラス（２）の両端を、側溝(１)の橋台（11）に載置して敷設する工程と、ロ）敷設後、コンクリート捨て型枠付き立体トラス（２）に差し込まれていたＵ字筋（３）を引出し、その折曲部（31）を橋台（11）の壁面に当接させるＵ字筋（３）の引出し工程と、ハ）引出されたＵ字筋（３）に突起物（４）を接触させないように立設する接続工程と、ニ）立体溶接鉄筋（21）の上方からコンクリート打設して各コンクリート捨て型枠付き立体トラス（２）が一体化されて覆工板を形成する工程とから成る施工方法とすることにより、現場に於いて、型枠の組立作業や鉄筋配筋作業が不要となるため、手間が省けると共に少ない作業員で作業が行え、施工の合理化が図れ、工期の短縮やコストダウンが可能となる。また型枠の解体撤去が不要となるため、従来の如き作業者が狭い側溝(１)の中に入って作業する必要がなく且つその狭い側溝(１)の中で大きく嵩ばる型枠を所定長さの出口まで人力で運び出さなくても良くなったので、力仕事に不向きな臨時の女性作業員でも作業が行えるものとなった。また覆工板が長くなる場合であっても、従来の如く所定長さに区切って施工しなくても良くなるので、一度で施工を完了させることができ、作業効率が飛躍的に向上する。
尚、前記Ｕ字筋（３）を立体溶接鉄筋（ 21 ）から引出し可能に差し込むことにより、コンクリート捨て型枠付き立体トラス（２）同士の結合や側溝 ( １ ) との結合が、Ｕ字筋（３）の折曲部（ 31 ）内側に突起物（４）を打込んでコンクリート打設させるだけの簡単な作業となる。又、現場に於いては殆ど手直しや修理が不要となり、従来の工法と比較して短工期で且つ省労力できると共にコスト削減も可能である。
【００１３】
請求項２のようにイ）側溝(１)の両側の橋台（11）に突起物（４）を所定ピッチで打込んで立設させる工程と、ロ）縦筋，横筋，ウエブ筋が組合わされて形成する立体溶接鉄筋（ 21 ）と、その下部にコンクリート打設して一体に形成されたコンクリート版 (22) とから成るコンクリート捨て型枠付き立体トラス（２）の両端を、橋台（11）に載置して敷設する工程と、ハ）突起物（４）の外側に接続用の長尺な鉄筋(５)を配置すると共にその長尺な鉄筋(５)と立体溶接鉄筋（21）と固定する接続工程と、ニ）立体溶接鉄筋（21）の上方からコンクリート打設し、敷設された各コンクリート捨て型枠付き立体トラス（２）が一体化されて覆工板を形成する工程とから成る施工方法とすることにより、請求項１と略同一の効果を得ることが出来る。特に、幅の狭い橋台（11）を有した側溝（１）に覆工板を施工する場合、突起物（４）に触らずに施工が可能である。またコンクリート捨て型枠付き立体トラス（２）の立体溶接鉄筋（21）にＵ字筋（３）を差し込むことがなくなるため、運搬時の重量がより減少できるものとなる。
【図面の簡単な説明】
【図１】本発明の実施形態の要部を示す断面図である。
【図２】本発明の実施形態の要部を示す平面図である。
【図３】本発明の別実施形態の要部を示す平面図である。
【図４】従来の実施形態の要部を示す断面図である。
【符号の説明】
１側溝
11 橋台
２コンクリート捨て型枠付き立体トラス
21 立体溶接鉄筋
22 コンクリート版
４突起物
５長尺な鉄筋
６短い鉄筋[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a gutter lining plate on an agricultural road.
[0002]
[Prior art]
FIG. 4 is a view showing a main part of a method for constructing a gutter lining plate in a conventional agricultural road. In this construction method, first, the formwork is installed so as to be flush with the abutment (11) of the gutter (1). At this time, the mold frame is positioned in contact with the inner surface of the side groove (1), and the mold frame is not dropped or warped by weight after work or after placing concrete. A support was installed and held between the bottom surfaces of the side grooves (1). After the formwork is installed, the reinforcing bars are worked by assembling them into an appropriate shape and using a number of spacers or the like so that the reinforcing bars float to a predetermined height from the abutment (11) surface. . Then, concrete is placed so that a lining plate can be formed above the abutment (11) of the side groove (1), and the concrete is supplied until the upper surface of the side groove (1) is flush. After the concrete is solidified, first, an operator enters the side groove (1), removes the support, disassembles the formwork, and sequentially places it in the side groove (1). Thereafter, the formwork and the support were carried out from the side groove (1).
[0003]
[Problems to be solved by the invention]
However, the method for constructing the side gutter lining plate is time-consuming and requires many workers because the work of assembling the formwork and rebar reinforcement work are performed on site. Also, after dismantling the formwork, the operator works in the narrow side groove (1), so the workability is very poor, and when carrying out the formwork in the narrow side groove (1), transport They couldn't be used because machines weren't included, and they had to rely on human power. In particular, the formwork was bulky, so it had to be carried out by hand to a fixed length of doorway formed by the lining plate, which was a heavy labor. For this reason, when a lining board became long, there existed problems, such as having to divide and construct to predetermined length, without forming at a stretch.
[0004]
The present invention provides a method for constructing a gutter lining plate on an agricultural road that can eliminate the work of the formwork, eliminates the need for formwork removal, which is particularly difficult, makes the work on-site easy and streamlines the construction. Objective.
[0005]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, that is, a) a solid welded reinforcing bar formed by combining vertical bars, horizontal bars, and web bars, and concrete placement in the lower part thereof. inside of the three-dimensional welding rebar with providing a concrete discarded formwork with space truss consisting of formed concrete panel, drawer capable forms from the opening side of the U-shaped muscle for connection, the concrete discarded formwork with truss (B) After laying, pull out each U-shaped streak inserted into the solid truss with a concrete formwork and place the bent part on the wall surface of the abutment. A step of pulling out U-shaped bars to be contacted; and c) a connecting step of placing protrusions such as concrete anchors and stud bolts on the inside of the bent portions of the pulled-out U-shaped bars and abutment. , D) And concreting from above the body welding rebar, the concrete discarded formwork with space truss laid is composed of a step of forming a lining plate are integrated.
[0006]
In addition, when a lining plate is constructed in a side gutter with a narrow width of the abutment, a) a process of placing protrusions on the abutment on both sides of the side gutter at a predetermined pitch, and b) a vertical line, a horizontal line, A three-dimensional truss with a concrete discarding mold consisting of a three-dimensional welded reinforcing bar formed by combining web bars and a concrete slab formed by placing concrete underneath is prepared. A step of placing both ends of the abutment on the abutment and laying a long reinforcing bar for connection on the outside of the projection , and one end of the long reinforcing bar ( 5 ) with a wire or welding While fixing the long reinforcing bar ( 5 ) and the solid welded rebar ( 21 ), the short reinforcing bar (6) that is fixed and the other end is fixed to the solid welded rebar ( 21 ) is used. Make sure that the connecting short rebar does not touch the projection It comprises a connecting step and d) a step of placing concrete from above the three-dimensional welded reinforcing bar and integrating the laid three-dimensional truss with a discarded concrete frame to form a lining plate.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 are diagrams showing an embodiment of the present invention. First, numbers in the drawings will be described. (1) is a concrete side groove for agricultural roads having an upper opening and a step on the upper edge. The abutment (11) refers to the lower step of the step provided at the upper edge of the side groove (1). (2) consists of a three-dimensional welded reinforcing bar ( 21 ) formed by combining vertical, horizontal and web bars, and a concrete plate (22) of a predetermined thickness integrally formed by placing concrete underneath. It is a three-dimensional truss with a discarded concrete formwork, which is brought to the site after finishing at the factory. At this time, the thickness from the reinforcing bar necessary for the concrete structure, that is, the distance from the bottom surface to the lower reinforcing bar is secured 3 cm or more. In addition, the three-dimensional truss (2) with a concrete discarding form may be the one having the structure of Japanese Patent Application No. 11-169099 proposed by the present inventor. (3) is a connecting U-bar which is a concrete rebar bent in a U-shape, and the U-bar (3) is inserted in advance in the factory so that it can be pulled out from the solid welding rebar (21). . At this time, if the bent portion (31) of the U-shaped line (3) is set so as to come to the outside, the opening side of the U-shaped line (3) is slightly shrunk and set with elasticity. good. (4) is a protrusion such as a concrete anchor or stud bolt, and the protrusion (4) is placed inside the bent part (31) of the U-shaped line (3) and driven into the abutment (11). Let it be used.
[0008]
Next, the construction method of the side groove lining board in the agricultural road of this embodiment is demonstrated. The U-shaped bar (3) is inserted in advance at the factory so that it can be pulled out from the solid welded bar (21). First of all, a) Place both ends of the solid truss (2) with a concrete throwing-out formwork (2) into which the U-shaped bars (3) are inserted on the abutment (11) of the gutter (1). Next, after all the laying work is completed, pull out the U-shaped bar (3) inserted into the solid truss (2) with the concrete disposal formwork, and hit the bent part (31) against the wall of the abutment (11). B) Pull out the U-shaped line (3). Then, a connection step is performed in which a protrusion (4) such as a concrete anchor or a stud bolt is driven and placed inside the bent portion (31) of the U-shaped line (3) and on the abutment (11). Is called. At this time, the protrusion (4) is not fixed to the U-shaped line (3) as shown in FIG. Next, by placing concrete from above the three-dimensional welded rebar (21), the laid three-dimensional truss (2) with each concrete disposal formwork is integrated and the process of forming the lining plate is completed. is there. The protrusion (4) is separated from the U-shaped bar (3) and the solid welded rebar (21), but the concrete truss (2) with the concrete-discarding formwork is installed on the abutment of the side groove (1). The protrusion (4) fixed to (11) and the solid welded rebar (21) are integrated, and a lining plate is firmly formed on the upper part of the side groove (1). Therefore, the firmly formed lining board can serve as a farm road.
[0009]
FIG. 3 is a diagram showing another embodiment of the present invention, which is a method of constructing a lining plate that can accommodate a conventionally used gutter (1) having a narrow abutment (11). First, the numbers in the figure will be described. (1) is a concrete side gutter for agricultural roads that is open at the top and has an abutment (11) at the upper edge. This side gutter (1) has the same width as the abutment (11), but is the same as the previous embodiment. May be used. In the above embodiment, when the side groove (1) having the narrow width of the abutment (11) is used, the bent portion (31) of the U-shaped line (3) and the projection (4) are in contact with each other or the projection. (4) may not enter the inside of the bent part (31). (2) uses the same three-dimensional truss (2) with a concrete disposal form as in the above embodiment. The U-shaped streak of (3) is not used. (4) is a protrusion such as a stud bolt. (5) is a long reinforcing bar for connection arranged outside the protrusion (4), and the long reinforcing bar (5) is arranged in a state of being floated by a bundle. (6) is a short reinforcing bar which is connected to a long reinforcing bar (5) and a solid welded reinforcing bar (21) by fixing one end at a time with a steel wire or welding. Make sure that it does not touch the battery.
[0010]
Next, a method for constructing a gutter lining plate in an agricultural road according to another embodiment will be described. First, a) a step of standing the protrusions (4) by driving the protrusions (4) such as stud bolts into a narrow abutment (11) on both sides of the side groove (1) at a predetermined pitch. In addition, this process may be performed after the installation process mentioned later, or may be performed after connecting a long rebar (5) with an iron wire or welding. (B) A three-dimensional welded concrete frame consisting of a three-dimensional welded reinforcing bar ( 21 ) formed by combining vertical bars, horizontal bars, and web bars, and a concrete plate (22) formed integrally by placing concrete underneath. The truss (2) is prepared, and the step of placing and laying both ends of the solid truss (2) with the concrete disposal formwork on the abutment (11) is performed. Next, a long reinforcing bar (5) for connection is arranged outside the projection (4) , and one end is fixed to the long reinforcing bar ( 5 ) by iron wire or welding and the other end. Using the short connecting rod (6) fixed to the solid welding rebar ( 21 ), the long reinforcing rod ( 5 ) and the solid welding rebar ( 21 ) are fixed while the short connecting rod is used. The connection process for confirming that the reinforcing bars (6) do not come into contact with the protrusions (4) is completed. And d) a step of placing concrete from above the three-dimensional welded rebar (21) and integrating the laid three-dimensional truss (2) with a discarded concrete frame to form a lining plate. For this reason, after the concrete is solidified, there is no need to remove the conventional support or to disassemble the mold and carry the mold or support out of the side groove (1).
[0011]
【The invention's effect】
The present invention is configured as described above and has the effects described below.
[0012]
As in claim 1, a) a three-dimensional welded reinforcing bar ( 21 ) formed by combining vertical bars, horizontal bars, and web bars, and a concrete plate (22) integrally formed by placing concrete underneath. Prepare a solid truss (2) with a discarded concrete frame and insert a U-shaped bar (3) into the solid welded rebar (21) so that it can be pulled out in advance. And (b) after laying, pull out the U-shaped bar (3) inserted into the solid truss (2) with the concrete disposal formwork, The step of pulling out the U-shaped line (3) that makes the bent portion (31) contact the wall surface of the abutment (11), and c) the protrusion (4) not to contact the pulled-out U-shaped line (3). a connecting step of vertically, the concrete from the top of d) sterically welded reinforcement (21) The construction method consists of the step of placing the three-dimensional truss (2) with each concrete disposal formwork and forming the lining plate, so that the assembly work of the formwork and the reinforcing bar Since the bar arrangement work is not required, the labor can be saved and the work can be performed with a small number of workers, the construction can be rationalized, the construction period can be shortened, and the cost can be reduced. In addition, since it is not necessary to dismantle and remove the formwork, it is not necessary for an operator like the prior art to enter the narrow side groove (1), and a predetermined large formwork is placed in the narrow side groove (1). Since it is no longer necessary to carry out to the exit of the length by manpower, even temporary female workers who are unsuitable for hard work can work. Further, even when the lining plate becomes long, it is not necessary to divide into a predetermined length as in the prior art, so that the construction can be completed at one time, and the working efficiency is dramatically improved.
Incidentally, by inserting a possible pull-out the U-shaped muscle (3) from the three-dimensional welded reinforcement (21), the bond between the concrete discarded formwork with space truss (2) binding and gutter between (1), U-shaped muscle This is a simple operation of placing the protrusion (4) inside the bent portion ( 31 ) of (3) and placing it in the concrete. In addition, almost no rework or repair is required on site, and the construction time is shorter and labor can be saved as compared with the conventional construction method, and the cost can be reduced.
[ 0013 ]
As in claim 2, a ) the step of placing the protrusions (4) on the abutments (11) on both sides of the side groove (1) at a predetermined pitch, and b) the vertical, horizontal, and web bars are combined. The ends of a solid truss (2) with a discarded concrete frame consisting of a three-dimensional welded rebar ( 21 ) and a concrete plate (22) formed by placing concrete underneath the bottom of the concrete truss (2) And c) placing a long reinforcing bar (5) for connection outside the protrusion (4), and connecting the long reinforcing bar (5) and the solid welded reinforcing bar (21) From the connecting step of fixing, and d) the step of placing concrete from above the three-dimensional welded rebar (21) and integrating the laid three-dimensional truss (2) with a concrete disposal formwork to form a lining plate By adopting the construction method, substantially the same effect as that of claim 1 can be obtained. In particular, when the lining plate is constructed in the side groove (1) having the narrow abutment (11), the construction can be performed without touching the protrusion (4). Further, since the U-shaped bar (3) is not inserted into the three-dimensional welded reinforcing bar (21) of the three-dimensional truss (2) with the concrete disposal mold, the weight during transportation can be further reduced.
[Brief description of the drawings]
FIG. 1 is a cross-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]
1 Side groove
11 Abutment 2 Solid truss with concrete formwork
21 Solid welded rebar
22 Concrete plate 4 Protrusion 5 Long reinforcing bar 6 Short reinforcing bar

Claims

A method for constructing a gutter lining plate on an agricultural road characterized by comprising the following steps.
B) A three-dimensional welded concrete frame consisting of a three-dimensional welded reinforcing bar ( 21 ) formed by combining vertical bars, horizontal bars, and web bars, and a concrete plate (22) integrally formed by placing concrete underneath. A truss (2) is prepared and inserted into the inside of the solid welded reinforcing bar (21) from the opening side of the connecting U-shaped bar (3) and can be pulled out. The step of placing both ends of 2) on the abutment (11) of the gutter (1) and laying.
B) After laying, pull out the connecting U-shaped bar (3) that was inserted into the solid truss (2) with the concrete disposal formwork, and contact the bent part (31) with the wall surface of the abutment (11) The drawing process of the U-shaped line (3) to be performed.
C) A connecting step in which protrusions (4) such as concrete anchors and stud bolts are driven upright inside the bent portion (31) of the drawn U-shaped line (3) and on the abutment (11).
D) A step of placing concrete from above the three-dimensional welded rebar (21) and integrating the laid three-dimensional truss (2) with a discarded concrete frame to form a lining plate.

A method for constructing a gutter lining plate on an agricultural road characterized by comprising the following steps.
B) A step of driving the abutments (11) on both sides of the side groove (1) by placing protrusions (4) such as stud bolts at a predetermined pitch and standing.
(B) A three-dimensional welded concrete frame consisting of a three-dimensional welded reinforcing bar ( 21 ) formed by combining vertical bars, horizontal bars, and web bars, and a concrete plate (22) formed integrally by placing concrete underneath. A step of preparing a truss (2) and placing both ends of the three-dimensional truss (2) with a concrete discarding frame on the abutment (11).
C) A long reinforcing bar (5) for connection is disposed outside the protrusion (4) , and one end is fixed to the long reinforcing bar ( 5 ) by an iron wire or welding and the other end is Using the short connecting rod (6) fixed to the solid welding rebar ( 21 ), the long reinforcing rod ( 5 ) and the solid welding rebar ( 21 ) are fixed while the short reinforcing rod ( 5 ) 6) A connecting step for confirming that the protrusion (4) does not come into contact with 6) .
D) A step of placing concrete from above the three-dimensional welded rebar (21) and integrating the laid three-dimensional truss (2) with a discarded concrete frame to form a lining plate.