JP2021161626A - Method of repairing catchment well - Google Patents

Method of repairing catchment well Download PDF

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JP2021161626A
JP2021161626A JP2020061337A JP2020061337A JP2021161626A JP 2021161626 A JP2021161626 A JP 2021161626A JP 2020061337 A JP2020061337 A JP 2020061337A JP 2020061337 A JP2020061337 A JP 2020061337A JP 2021161626 A JP2021161626 A JP 2021161626A
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repairing
reinforcing ring
catchment well
catchment
ring
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JP7393277B2 (en
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愛美 松本
Manami Matsumoto
栄昭 木村
Shigeaki Kimura
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JFE Metal Products and Engineering Inc
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Abstract

To provide a method of repairing a catchment well that can reinforce only a reinforcing ring where corrosion occurs without removing a reinforcing ring which has difficulty in work while maintaining sound liner plates and reinforcing ring.SOLUTION: A method for repairing an existing catchment well which is composed of a cylindrical member in which curved liner plates are continuously combined in a circumferential direction and an axial direction in a substantially cylindrical shape and continuously connected in the axial direction by an annular reinforcing ring, comprises: a step of attaching a connecting angle to an axial connecting flange that axially connects the liner plates located at least one of the upper side or the lower side of a corroded reinforcing ring when the reinforcing ring is corroded; and a reinforcing step of attaching an inner winding ring to the inner peripheral side of the connecting angle.SELECTED DRAWING: Figure 2

Description

本発明は、ライナープレートなどによって構成される集水井の補修方法に関する。 The present invention relates to a method for repairing a catchment well composed of a liner plate or the like.

従来、ライナープレートを用いて集水井を構成することが知られている。ライナープレートを用いた集水井は、工期の短縮、施工のしやすさ及び集水効率の高さなどの理由から、広く用いられている。 Conventionally, it is known that a water collecting well is constructed by using a liner plate. A water collecting well using a liner plate is widely used because of shortening the construction period, ease of construction, and high water collection efficiency.

このようなライナープレートを用いた集水井の構造は、湾曲したライナープレートを周方向及び軸方向に連続して略円筒状に組み合わせた円筒部材を複数構成し、これらの円筒部材を軸方向に重ねるとともに、円環状の補強リングによって軸方向に互いに連結して構成している。 The structure of the catchment well using such a liner plate comprises a plurality of cylindrical members in which curved liner plates are continuously combined in a circumferential direction and an axial direction in a substantially cylindrical shape, and these cylindrical members are stacked in the axial direction. At the same time, they are connected to each other in the axial direction by an annular reinforcing ring.

このような構成の集水井は、長期間の使用によって、例えば補強リングに腐食が生じる場合がある。補強リングに腐食が生じると、軸方向の耐荷重性能に影響が生じるため、これを補修する方法が知られている。 A catchment well having such a structure may cause corrosion, for example, in the reinforcing ring due to long-term use. Corrosion of the reinforcing ring affects the load bearing performance in the axial direction, and a method for repairing this is known.

この補修方法は種々の方法が知られているが、例えば、特許文献1に記載されたような工法が知られている。この工法は、いわゆる外巻工法と呼ばれており、以下の手順で行われている。(1)既設集水坑内の付属物を解体撤去する。(2)地上にてセグメントを円筒状に組立て、軸方向の接合を行い上端部の周方向にセット部材を取付け円筒ユニットを形成する。(3)既設集水坑の底部に設けられている集水桝上に一段目の円筒ユニットをセット部材が上側になるようにして吊り下ろし設置する。(4)以下、同様にして円筒ユニットを形成し、集水坑内に円筒ユニットを吊り下ろし、先行して設置した円筒ユニットのセット部材上に設置する作業を2段目から最終段目まで繰り返す。(5)各段の円筒ユニットを設置する毎、または全ての円筒ユニットを設置した後、既設集水坑内壁と円筒外周面との間隙に裏込め材を充填する。(6)円筒内の所定位置にボーリング装置を配置して集水坑外の地盤中に水平ボーリングを行い集水管をセットする。 Various repair methods are known, and for example, a construction method as described in Patent Document 1 is known. This method is the so-called outer winding method, and is performed by the following procedure. (1) Dismantle and remove the accessories in the existing catchment mine. (2) Assemble the segments into a cylindrical shape on the ground, join them in the axial direction, and attach the set member in the circumferential direction of the upper end to form a cylindrical unit. (3) The first-stage cylindrical unit is suspended and installed on the catchment basin provided at the bottom of the existing catchment pit so that the set member is on the upper side. (4) Hereinafter, the work of forming a cylindrical unit in the same manner, suspending the cylindrical unit in the catchment pit, and installing the cylindrical unit on the set member of the previously installed cylindrical unit is repeated from the second stage to the final stage. (5) Each time the cylindrical unit of each stage is installed, or after installing all the cylindrical units, the backfill material is filled in the gap between the inner wall of the existing water collecting pit and the outer peripheral surface of the cylinder. (6) A boring device is placed at a predetermined position in the cylinder, horizontal boring is performed in the ground outside the catchment pit, and a catchment pipe is set.

また、既存のライナープレートの内側に新たにライナープレート集水井を設置して、既存のライナープレートと新設したライナープレートの間に裏込め材を充填する内巻工法なども知られている。 Further, there is also known an inner winding method in which a liner plate collecting well is newly installed inside the existing liner plate and a backfill material is filled between the existing liner plate and the newly installed liner plate.

特開2000−282479号公報Japanese Unexamined Patent Publication No. 2000-282479

しかしながら、従来の補修方法は、健全なライナープレートや補強リングの内側又は外側に、既存の補強リングと同等のものを設置し機能の維持を図る補修方法であり、集水井全体を更新するために補修工期や費用がかかってしまい、健全なライナープレートを有効に活用できないという問題があった。 However, the conventional repair method is a repair method in which the same as the existing reinforcement ring is installed inside or outside a sound liner plate or reinforcement ring to maintain the function, and in order to renew the entire catchment well. There was a problem that a sound liner plate could not be used effectively because the repair work period and cost were required.

そこで本発明は、上記問題点に鑑みてされた発明であり、健全なライナープレートや補強リングは維持したまま、作業困難な補強リングの撤去を行わずに、腐食が生じた補強リングのみを補強することができる集水井の補修方法を提供することを目的とする。 Therefore, the present invention has been made in view of the above problems, and only the corroded reinforcing ring is reinforced without removing the difficult reinforcing ring while maintaining a sound liner plate and reinforcing ring. The purpose is to provide a method of repairing a catchment well that can be used.

本発明に係る集水井の補修方法は、湾曲したライナープレートを周方向及び軸方向に連続して略円筒状に組み合わせた円筒部材を円環状の補強リングによって軸方向に連続して連結して構成した既設の集水井の補修方法であって、前記補強リングが腐食した場合に、前記腐食した補強リングの上方または下方の少なくともいずれか一方に位置する前記ライナープレートを軸方向に連結する軸方向連結フランジに連結アングルを取り付ける工程と、前記連結アングルの内周側に内巻きリングを取り付ける補強工程と、を有することを特徴とする。 The method for repairing a water collecting well according to the present invention is configured by connecting cylindrical members in which curved liner plates are continuously formed in a substantially cylindrical shape in the circumferential direction and the axial direction by an annular reinforcing ring. This is a method of repairing an existing water collecting well, in which, when the reinforcing ring is corroded, the liner plate located at least one of the upper side and the lower side of the corroded reinforcing ring is axially connected. It is characterized by having a step of attaching a connecting angle to a flange and a reinforcing step of attaching an inner winding ring to the inner peripheral side of the connecting angle.

また、本発明に係る集水井の補修方法において、前記連結アングルは、前記ライナープレートを周方向に連結する周方向連結フランジと干渉しないように、周方向に分割されていると好適である。 Further, in the method for repairing a catchment well according to the present invention, it is preferable that the connecting angle is divided in the circumferential direction so as not to interfere with the circumferential connecting flange that connects the liner plate in the circumferential direction.

また、本発明に係る集水井の補修方法において、前記連結アングルは、前記軸方向連結フランジを上下に挟持する一対のL形鋼であると好適である。 Further, in the method for repairing a catchment well according to the present invention, it is preferable that the connecting angle is a pair of L-shaped steels that vertically sandwich the axial connecting flange.

また、本発明に係る集水井の補修方法において、前記内巻きリングは、前記腐食した補強リングの上方に取り付けられると好適である。 Further, in the method for repairing a catchment well according to the present invention, it is preferable that the inward winding ring is attached above the corroded reinforcing ring.

上記発明の概要は、本発明の必要な特徴の全てを列挙したものではなく、これらの特徴群のサブコンビネーションもまた発明となり得る。 The outline of the above invention does not list all the necessary features of the present invention, and subcombinations of these feature groups can also be inventions.

本発明に係る集水井の補修方法によれば、作業困難な腐食が生じた補強リングの撤去を行うことなく、新たに内巻きリングを設置することで補修及び補強を行うことができる。また、集水井全体を更新するのではなく、腐食が生じた補強リングのみの補修が可能になり、補修工期の短縮や費用削減を図ることができる。 According to the method for repairing a catchment well according to the present invention, repair and reinforcement can be performed by newly installing an inward winding ring without removing the reinforcing ring that has been corroded, which is difficult to work with. In addition, instead of renewing the entire catchment well, it is possible to repair only the corroded reinforcing ring, shortening the repair work period and reducing costs.

集水井の構成を示す断面図。Sectional drawing which shows the structure of the catchment well. 本発明の実施形態に係る集水井の補修方法を説明するための断面図。The cross-sectional view for demonstrating the repair method of the catchment well which concerns on embodiment of this invention. 本発明の実施形態に係る集水井の補修方法を説明するための軸方向断面図。A cross-sectional view in an axial direction for explaining a method of repairing a catchment well according to an embodiment of the present invention. 図3におけるA部拡大図。FIG. 3 is an enlarged view of part A in FIG.

以下、本発明を実施するための好適な実施形態について、図面を用いて説明する。なお、以下の実施形態は、各請求項に係る発明を限定するものではなく、また、実施形態の中で説明されている特徴の組み合わせの全てが発明の解決手段に必須であるとは限らない。 Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

図1は、集水井の構成を示す断面図であり、図2は、本発明の実施形態に係る集水井の補修方法を説明するための断面図であり、図3は、本発明の実施形態に係る集水井の補修方法を説明するための軸方向断面図であり、図4は、図3におけるA部拡大図である。 FIG. 1 is a cross-sectional view showing the configuration of a catchment well, FIG. 2 is a cross-sectional view for explaining a method of repairing the catchment well according to the embodiment of the present invention, and FIG. 3 is a cross-sectional view for explaining the embodiment of the present invention. It is an axial sectional view for demonstrating the repair method of the drainage well which concerns on FIG. 4, and FIG. 4 is an enlarged view of part A in FIG.

図1に示すように、本実施形態に係る集水井の補修方法の補修対象となる集水井1は、湾曲したライナープレート10を周方向及び軸方向に連続して略円筒状に組み合わせた円筒部材20を円環状の補強リング30によって軸方向に連続して連結して構成されている。 As shown in FIG. 1, the water collecting well 1 to be repaired by the water collecting well repair method according to the present embodiment is a cylindrical member in which curved liner plates 10 are continuously combined in a circumferential direction and an axial direction in a substantially cylindrical shape. 20 is continuously connected in the axial direction by an annular reinforcing ring 30.

ライナープレート10は、図2に示すように、波状に形成された鋼材の四辺に所定の間隔で接合孔12を有した軸方向連結フランジ11及び周方向連結フランジ13が形成されている。円筒部材20は、複数のライナープレート10を周方向及び軸方向に並べ、隣り合う軸方向連結フランジ11、11及び周方向連結フランジ13,13の接合孔12をボルト接合することで円筒状に組み合わされている。なお、軸方向に隣り合うライナープレート10は、軸方向に沿って周方向連結フランジ13が重畳しないように、ライナープレート10を千鳥状に配置している。 As shown in FIG. 2, the liner plate 10 is formed with an axial connecting flange 11 and a circumferential connecting flange 13 having joint holes 12 at predetermined intervals on four sides of a wavy steel material. The cylindrical member 20 is combined in a cylindrical shape by arranging a plurality of liner plates 10 in the circumferential direction and the axial direction and bolting the joint holes 12 of the adjacent axial connecting flanges 11 and 11 and the circumferential connecting flanges 13 and 13. Has been done. The liner plates 10 adjacent to each other in the axial direction are arranged in a staggered manner so that the circumferential connecting flanges 13 do not overlap along the axial direction.

集水井1は、この円筒部材20を軸方向に重ね合わせて構成されており、円筒部材20の間には、所望の剛性を確保する目的で、H形鋼などからなる補強リング30が介在している。補強リング30は、円筒部材20の軸方向端部に配置されたライナープレート10の軸方向連結フランジ11に連結されている。 The water collecting well 1 is configured by superimposing the cylindrical members 20 in the axial direction, and a reinforcing ring 30 made of H-shaped steel or the like is interposed between the cylindrical members 20 for the purpose of ensuring desired rigidity. ing. The reinforcing ring 30 is connected to the axial connecting flange 11 of the liner plate 10 arranged at the axial end of the cylindrical member 20.

次に、図2〜4を参照して、本実施形態に係る集水井の補修方法について説明を行う。図2に示すように、集水井1の使用によって、補強リングに腐食が生じた場合、本実施形態に係る集水井の補修方法は、当該腐食した補強リング31の少なくとも上方又は下方の少なくとも何れか一方に位置する軸方向連結フランジ11に連結アングル42を取り付ける工程と、当該連結アングル42の内周側に内巻きリング41を取りつける補強工程とを有する。 Next, a method of repairing the catchment well according to the present embodiment will be described with reference to FIGS. 2 to 4. As shown in FIG. 2, when the reinforcing ring is corroded by the use of the catchment well 1, the method of repairing the catchment well according to the present embodiment is at least either above or below the corroded reinforcement ring 31. It has a step of attaching the connecting angle 42 to the axial connecting flange 11 located on one side, and a reinforcing step of attaching the inner winding ring 41 to the inner peripheral side of the connecting angle 42.

図3に示すように、内巻きリング41及び連結アングル42からなる補強構造40は、腐食した補強リング31の上方及び下方の少なくとも何れか一方に形成されると好適であるが、腐食した補強リング31の耐荷重性能を考慮すると、腐食した補強リング31の上方に補強構造40を構成するとより好適である。 As shown in FIG. 3, the reinforcing structure 40 including the inward winding ring 41 and the connecting angle 42 is preferably formed on at least one of the upper side and the lower side of the corroded reinforcing ring 31, but the corroded reinforcing ring. Considering the load-bearing performance of 31, it is more preferable to configure the reinforcing structure 40 above the corroded reinforcing ring 31.

次に、図4を参照して、補強構造40の詳細について説明を行う。図4に示すように、腐食した補強リング31が取り付けられていた軸方向連結フランジ11を有するライナープレート10の相対する軸方向連結フランジ11に取り付けられた連結ボルト43を取り外し、軸方向連結フランジ11を上下から挟み込むように一対の連結アングル42を配置して、当該連結アングル42が軸方向連結フランジ11に連結ボルト43で連結されている。 Next, the details of the reinforcing structure 40 will be described with reference to FIG. As shown in FIG. 4, the connecting bolt 43 attached to the opposite axial connecting flange 11 of the liner plate 10 having the axial connecting flange 11 to which the corroded reinforcing ring 31 was attached is removed, and the axial connecting flange 11 is removed. A pair of connecting angles 42 are arranged so as to sandwich the connecting angles 42 from above and below, and the connecting angles 42 are connected to the axial connecting flange 11 by connecting bolts 43.

連結アングル42は、L形鋼で構成されると好適であり、L形鋼の一方のフランジを軸方向連結フランジ11に連結している。また、L形鋼の他方のフランジは、内巻きリング41が連結ボルト43によって連結されている。また、図2に示すように、連結アングル42は、集水井1の周方向に沿って延設されているが、円筒部材20の周方向連結フランジ13と干渉しないように、周方向に分割されている。 The connecting angle 42 is preferably made of L-shaped steel, and one flange of the L-shaped steel is connected to the axial connecting flange 11. Further, in the other flange of the L-shaped steel, the inner winding ring 41 is connected by a connecting bolt 43. Further, as shown in FIG. 2, the connecting angle 42 extends along the circumferential direction of the catchment well 1, but is divided in the circumferential direction so as not to interfere with the circumferential connecting flange 13 of the cylindrical member 20. ing.

内巻きリング41は、H形鋼で構成されると好適であり、集水井1の内周に沿って所定の曲率で湾曲している。なお、内巻きリング41と連結アングル42とを連結する連結ボルト43は、周方向連結フランジ13と干渉しないように、配置されている。 The inner winding ring 41 is preferably made of H-shaped steel and is curved with a predetermined curvature along the inner circumference of the catchment well 1. The connecting bolt 43 that connects the inner winding ring 41 and the connecting angle 42 is arranged so as not to interfere with the circumferential connecting flange 13.

このように構成された本実施形態に係る集水井の補修方法によれば、腐食した補強リング31の撤去を行うことなく、集水井1の内周に補強構造40を構築することで、補修及び補強を行うことができるので、腐食した補強リング31の撤去が不要となり、容易に集水井の補修を行うことができる。 According to the method for repairing the catchment well according to the present embodiment configured as described above, the repair and repair can be performed by constructing the reinforcement structure 40 on the inner circumference of the catchment well 1 without removing the corroded reinforcing ring 31. Since the reinforcement can be performed, it is not necessary to remove the corroded reinforcement ring 31, and the catchment well can be easily repaired.

また、従来の方法のように、集水井1全体を更新することなく、健全なライナープレート10や補強リング30を残したまま、既存の補強リング30と同等の性能を有する補強構造40を設置することができるので、十分な補強及び補修を行うことができると共に、補修工期の短縮や費用を大幅に削減することが可能となる。 Further, unlike the conventional method, the reinforcing structure 40 having the same performance as the existing reinforcing ring 30 is installed without updating the entire catchment well 1 while leaving the sound liner plate 10 and the reinforcing ring 30. Therefore, sufficient reinforcement and repair can be performed, and the repair work period can be shortened and the cost can be significantly reduced.

なお、以上の実施の形態では、腐食した補強リングの上方及び下方の両方に補強構造40を施した場合について説明を行ったが、上方又は下方の何れか一方のみに補強構造40を配置しても構わない。その様な変更又は改良を加えた形態も本発明の技術的範囲に含まれうることが、特許請求の範囲の記載から明らかである。 In the above embodiment, the case where the reinforcing structure 40 is applied to both the upper side and the lower side of the corroded reinforcing ring has been described, but the reinforcing structure 40 is arranged only on either the upper side or the lower side. It doesn't matter. It is clear from the description of the claims that the form with such changes or improvements may be included in the technical scope of the present invention.

1 集水井, 10 ライナープレート, 11 軸方向連結フランジ, 12 接合孔, 13 周方向連結フランジ, 20 円筒部材, 30 補強リング, 31 腐食した補強リング, 40 補強構造, 41 内巻きリング, 42 連結アングル, 43 連結ボルト。 1 Reservoir, 10 Liner plate, 11 Axial connecting flange, 12 Joint hole, 13 Circumferential connecting flange, 20 Cylindrical member, 30 Reinforcing ring, 31 Corroded reinforcing ring, 40 Reinforcing structure, 41 Inner winding ring, 42 Connecting angle , 43 Connecting bolts.

Claims (4)

湾曲したライナープレートを周方向及び軸方向に連続して略円筒状に組み合わせた円筒部材を円環状の補強リングによって軸方向に連続して連結して構成した既設の集水井の補修方法であって、
前記補強リングが腐食した場合に、前記腐食した補強リングの上方または下方の少なくともいずれか一方に位置する前記ライナープレートを軸方向に連結する軸方向連結フランジに連結アングルを取り付ける工程と、
前記連結アングルの内周側に内巻きリングを取り付ける補強工程と、を有することを特徴とする集水井の補修方法。
This is a repair method for an existing drainage well, which consists of a cylindrical member in which curved liner plates are continuously connected in the circumferential direction and the axial direction in a substantially cylindrical shape and continuously connected in the axial direction by an annular reinforcing ring. ,
When the reinforcing ring is corroded, a step of attaching a connecting angle to an axial connecting flange that axially connects the liner plate located at least one of the upper side or the lower side of the corroded reinforcing ring.
A method for repairing a catchment well, which comprises a reinforcing step of attaching an inner winding ring to the inner peripheral side of the connecting angle.
請求項1に記載の集水井の補修方法において、
前記連結アングルは、前記ライナープレートを周方向に連結する周方向連結フランジと干渉しないように、周方向に分割されていることを特徴とする集水井の補修方法。
In the method for repairing a catchment well according to claim 1,
A method for repairing a catchment well, wherein the connecting angle is divided in the circumferential direction so as not to interfere with the circumferential connecting flange that connects the liner plate in the circumferential direction.
請求項1または2に記載の集水井の補修方法において、
前記連結アングルは、前記軸方向連結フランジを上下に挟持する一対のL形鋼であることを特徴とする集水井の補修方法。
In the method for repairing a catchment well according to claim 1 or 2,
A method for repairing a catchment well, wherein the connecting angle is a pair of L-shaped steels that sandwich the axial connecting flange up and down.
請求項1から3のいずれか1項に記載の集水井の補修方法において、
前記内巻きリングは、前記腐食した補強リングの上方に取り付けられることを特徴とする集水井の補修方法。
In the method for repairing a catchment well according to any one of claims 1 to 3,
A method for repairing a catchment well, wherein the inward winding ring is attached above the corroded reinforcing ring.
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JP2000282479A (en) 1999-03-30 2000-10-10 Nippon Steel Corp Construction method for repairing existing catchment pile
JP2003221996A (en) 2002-01-31 2003-08-08 Jfe Metal Products & Engineering Inc Internal winding reinforced ring structure of liner plate shaft
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