JP5728403B2 - Earthquake response manhole protection method - Google Patents

Earthquake response manhole protection method Download PDF

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JP5728403B2
JP5728403B2 JP2012014209A JP2012014209A JP5728403B2 JP 5728403 B2 JP5728403 B2 JP 5728403B2 JP 2012014209 A JP2012014209 A JP 2012014209A JP 2012014209 A JP2012014209 A JP 2012014209A JP 5728403 B2 JP5728403 B2 JP 5728403B2
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concrete side
concrete
lump
sheet
jointed
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JP2013155479A (en
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今▲崎▼ 雄司
雄司 今▲崎▼
研三 佐藤
研三 佐藤
聡 南澤
聡 南澤
和輝 飯田
和輝 飯田
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Tokyo Metropolitan Sewerage Service Corp
Nippon Koei Co Ltd
Nippon Hume Corp
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Tokyo Metropolitan Sewerage Service Corp
Nippon Koei Co Ltd
Nippon Hume Corp
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Description

本発明は、積層されたコンクリート側塊の接合部の耐震化を図る地震対応人孔保護工法に関する。   The present invention relates to an earthquake-resistant manhole protecting method for improving the earthquake resistance of a joint portion of laminated concrete side blocks.

過去に発生した大きな地震において、下水道施設は甚大な被害を被り、市民生活に与えた影響は深刻なものであった。そのなかで、コンクリート側塊を積層して構築された下水道用の人孔にあっては、コンクリート側塊の接合部がずれるといった被害が多くみられ、接合部のずれから土砂や水が人孔内に流入し、下水道の機能が損なわれるといった事態が発生した。   Seismic facilities have been severely damaged by major earthquakes that occurred in the past, and the impact on citizens' lives was serious. Among them, there are many damages such as slipping of the joints of the concrete side blocks in the human holes for sewer constructed by laminating the concrete side blocks, and earth and sand and water are removed from the joints. The situation that it entered into the inside and the function of the sewer was damaged.

このため、地震により人孔のコンクリート側塊の接合部がずれたとき、接合部のずれから人孔内への土砂や水の流入を防ぐ手立てが求められており、そのための手段として、積層されたコンクリート側塊の接合部の内側に、内側の上下に内部シール材を設けたゴム製保護カラーを当接して、圧接治具によりゴム製保護カラーをコンクリート側塊に圧接させる地震対応人孔保護工法が提案されている(例えば、特許文献1参照。)。
ゴム製保護カラーは、胴部の略中央部に内方に突出して形成した伸縮調整部を設け、地震により人孔のコンクリート側塊の接合部がずれたとき、伸縮調整部が伸びてゴム製保護カラーで接合部を塞いだ状態を保持し、接合部のずれから人孔内への土砂や水の流入を防ぐことができるものとなっている。
For this reason, when the joint part of the concrete side block of the human hole is displaced due to an earthquake, a means to prevent the inflow of earth and sand and water into the human hole from the displacement of the joint part is required. An earthquake-resistant manhole protects a rubber protective collar with internal seals on the inside and abutting the inside of the joint of the concrete side lump, and presses the rubber protective collar against the concrete side lump with a pressure welding jig A construction method has been proposed (see, for example, Patent Document 1).
The protective collar made of rubber is provided with an expansion / contraction adjustment part that protrudes inwardly at the approximate center of the trunk, and when the joint of the concrete side block of the human hole is displaced due to an earthquake, the expansion / contraction adjustment part extends and is made of rubber The state where the joint portion is closed with the protective collar is maintained, and the inflow of earth and sand and water into the human hole from the displacement of the joint portion can be prevented.

特開2000−291034号公報Japanese Patent Laid-Open No. 2000-29134

しかしながら、この特許文献1参照に記載された地震対応人孔保護工法によれば、接合部のずれから人孔内へ流入する土砂や水の流入圧がゴム製保護カラーの伸縮調整部の伸び限界を超えると、ゴム製保護カラーが破断してしまうことになる。このため、土砂や水の流入圧を大きく予想した場合、この流入圧に耐えるために、いきおいゴム製保護カラーを厚く設定しなければならず、ゴム製保護カラーを厚くすると、その分、ゴム製保護カラーをコンクリート側塊に圧接させる作業が困難となり、また、コストアップにもなるといった問題があった。   However, according to the earthquake-resistant manhole protection construction method described in Patent Document 1, the inflow pressure of earth and sand flowing into the manhole due to the displacement of the joint is limited by the extension limit of the expansion / contraction adjustment portion of the rubber protective collar. Exceeding this will break the rubber protective collar. For this reason, when the inflow pressure of earth and sand or water is predicted to be large, in order to withstand this inflow pressure, it is necessary to set a thick rubber protective collar. There was a problem that it was difficult to press the protective collar against the concrete side block, and the cost was increased.

本発明の目的は、地震により人孔のコンクリート側塊の接合部がずれがあったとき、接合部のずれから人孔内への土砂や水の流入を有効に防いで人孔を保護することができる地震対応人孔保護工法を提供することにある。   The purpose of the present invention is to protect the human hole by effectively preventing the inflow of earth and sand into the human hole from the shift of the joint part when the joint part of the concrete side block of the human hole is displaced due to the earthquake. It is to provide an earthquake-resistant manhole protection method that can be used.

上記の目的を達成するために、請求項1に記載の発明は、積層されたコンクリート側塊の接合部の耐震化を図る地震対応人孔保護工法であって、引っ張り強度の強い合成樹脂で成形した可撓シートを基材として前記積層されたコンクリート側塊の内周に対応する筒状体を形成し、前記筒状体の胴部の概ね中央部位に、軸方向に展開可能な折り畳み部を周方向に形成し、前記筒状体における前記折り畳み部の両側の胴部分の外周面にコンクリート側塊接着面を設けた目地継ぎ筒状シートと、少なくとも前記コンクリート側塊の破壊よりも弱い力で破断する合成樹脂で成形した可撓シートを基材として、前記積層されたコンクリート側塊の内周に対応し且つ前記目地継ぎ筒状シートにおける折り畳み部の両側の胴部分の外周面に設けたコンクリート側塊接着面の間に収まる幅の筒状体を形成し、前記筒状体における胴部外周面をコンクリート側塊接着面とした目地継ぎ筒状シールとを用意し、前記目地継ぎ筒状シールを、前記積層されたコンクリート側塊の内側に接合部を跨ぐように配置し接着して固定し、次ぎに、前記目地継ぎ筒状シートを、前記積層されたコンクリート側塊の内側に前記目地継ぎ筒状シールを覆うように配置し、前記折り畳み部の両側の胴部分の外周面に設けた何れか一側のコンクリート側塊接着面を上側のコンクリート側塊の内側に、他側のコンクリート側塊接着面を下側のコンクリート側塊の内側に接着して固定することを特徴とする。   In order to achieve the above-mentioned object, the invention according to claim 1 is an earthquake-resistant manhole protecting method for seismicizing the joint portion of laminated concrete side blocks, which is molded from a synthetic resin having high tensile strength. The flexible sheet is used as a base material to form a cylindrical body corresponding to the inner periphery of the laminated concrete side block, and a foldable portion that can be expanded in the axial direction is formed at a substantially central portion of the body portion of the cylindrical body. The jointed tubular sheet formed in the circumferential direction and provided with a concrete side lump adhesive surface on the outer peripheral surface of the body portion on both sides of the folded portion of the tubular body, and at least with a force weaker than the destruction of the concrete side lump A flexible sheet formed of a synthetic resin that breaks, with a base material corresponding to the inner periphery of the laminated concrete side lump and provided on the outer peripheral surface of the trunk portion on both sides of the folded portion of the jointed tubular sheet Forming a cylindrical body having a width that fits between the side lump bonding surfaces, and preparing a jointed cylindrical seal having a body outer peripheral surface of the cylindrical body as a concrete side lump bonding surface; and the jointed cylindrical seal Is placed and bonded to the inside of the laminated concrete side block so as to straddle the joint, and then the jointed tubular sheet is connected to the inside of the laminated concrete side block. Arranged so as to cover the cylindrical seal, either side of the concrete side block bonding surface provided on the outer peripheral surface of the body portion on both sides of the folded part is inside the upper side concrete side block, the other side concrete side block The adhesive surface is bonded and fixed to the inside of the lower concrete side block.

請求項2に記載の発明は、請求項1に記載の、前記目地継ぎ筒状シート及び前記目地継ぎシールにおける前記コンクリート側塊接着面には合成繊維シートが溶着されていることを特徴とする。   A second aspect of the present invention is characterized in that a synthetic fiber sheet is welded to the concrete side lump bonding surface of the jointed tubular sheet and the jointed seal according to the first aspect.

請求項3に記載の発明は、請求項1または2に記載の、前記積層されたコンクリート側塊の上側のコンクリート側塊の内壁面の全部又は一部が錐体状の傾斜面となっているとき、前記目地継ぎ筒状シートの前記筒状体における前記折り畳み部の一側の胴部分の外壁面を前記上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成するとともに、前記目地継ぎ筒状シールの前記筒状体における胴部を軸方向に概ね2分し、一側の胴部分の外壁面を前記上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成することを特徴とする。   According to a third aspect of the present invention, all or part of the inner wall surface of the concrete side block on the upper side of the laminated concrete side block according to the first or second aspect is a cone-shaped inclined surface. When the outer wall surface of the body portion on one side of the folded portion of the tubular body of the jointed tubular sheet is a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the upper concrete side block And forming the cylindrical portion of the tubular body of the jointed cylindrical seal in the axial direction approximately in half so that the outer wall surface of the one-side trunk portion is a cone-shaped inclined surface of the upper concrete side lump. It forms in the corresponding cone-shaped inclined surface, It is characterized by the above-mentioned.

請求項4に記載の発明は、請求項3に記載の、前記積層されたコンクリート側塊の上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成された前記目地継ぎ筒状シートの前記筒状体における前記一側の胴部分の外壁面は、前記一側の胴部分を円周方向に沿って適宜間隔で且つ適宜角度の三角形に折り畳み前記一側の胴部分の開口部を縮径して形成され、また、前記積層されたコンクリート側塊の上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成された前記目地継ぎ筒状シールの前記筒状体における前記一側の胴部分の外壁面は、前記一側の胴部分を円周方向に沿って適宜間隔で且つ適宜角度の三角形に折り畳み前記一側の胴部分の開口部を縮径して形成されることを特徴とする。   Invention of Claim 4 was formed in the cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the concrete side block of the upper side of the laminated concrete side block of Claim 3 according to Claim 3. An outer wall surface of the one-side body portion of the tubular body of the jointed tubular sheet is formed by folding the one-side body portion into a triangle having an appropriate interval and an appropriate angle along the circumferential direction. The joint joint is formed by reducing the diameter of the opening of the portion and formed on a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the concrete side block on the upper side of the laminated concrete side block. The outer wall surface of the one-side body portion of the cylindrical body of the cylindrical seal is formed by folding the one-side body portion into a triangle at an appropriate interval and an appropriate angle along the circumferential direction. The opening is formed with a reduced diameter.

請求項1に記載の地震対応人孔保護工法によれば、引っ張り強度の強い合成樹脂で成形した可撓シートを基材として前記積層されたコンクリート側塊の内周に対応する筒状体を形成し、前記筒状体の胴部の概ね中央部位に、軸方向に展開可能な折り畳み部を周方向に形成し、前記筒状体における前記折り畳み部の両側の胴部分の外周面にコンクリート側塊接着面を設けた目地継ぎ筒状シートと、少なくとも前記コンクリート側塊の破壊よりも弱い力で破断する合成樹脂で成形した可撓シートを基材として、前記積層されたコンクリート側塊の内周に対応し且つ前記目地継ぎ筒状シートにおける折り畳み部の両側の胴部分の外周面に設けたコンクリート側塊接着面の間に収まる幅の筒状体を形成し、前記筒状体における胴部外周面をコンクリート側塊接着面とした目地継ぎ筒状シールとを用意し、前記目地継ぎシールを、前記積層されたコンクリート側塊の内側に接合部を跨ぐように配置し接着して固定し、次ぎに、前記目地継ぎ筒状シートを、前記積層されたコンクリート側塊の内側に前記目地継ぎ筒状シールを覆うように配置し、前記折り畳み部の両側の胴部分の外周面に設けた何れか一側のコンクリート側塊接着面を上側のコンクリート側塊の内側に、他側のコンクリート側塊接着面を下側のコンクリート側塊の内側に接着して固定するので、地震により人孔のコンクリート側塊の接合部がずれたとき、そのずれ幅が小さい場合は、前記目地継ぎシールがコンクリート側塊の接合部のずれに追随して変形し、人孔のコンクリート側塊の接合部のずれから人孔内への土砂や水の流入を防ぐことができる。
そして、コンクリート側塊の接合部のずれが、前記目地継ぎシールで固定されたコンクリート側塊の破壊強度を超えるほど大きい場合、コンクリート側塊の破壊の前に前記目地継ぎシールが破断して、コンクリート側塊のずれを妨げないので、コンクリート側塊の破壊を防止することができ、そして、コンクリート側塊の接合部のずれに追随して前記目地継ぎ筒状シートの胴部の概ね中央部位に形成されている折り畳み部が変形し、人孔のコンクリート側塊の接合部のずれから人孔内への土砂や水の流入を防ぐことができる。
また、前記目地継ぎ筒状シートと目地継ぎ筒状シールは、いずれも可撓シートを基材としているので、従来のゴム製に比べ薄く形成することができるから、人孔内部空間の狭窄が防げ、また軽量化が図れ、取り扱いが容易となり、コンクリート側塊への固定作業が容易に行え、またコストの低減化を図ることができる。
According to the earthquake-resistant manhole protecting method according to claim 1, a cylindrical body corresponding to the inner periphery of the laminated concrete side block is formed using a flexible sheet formed of a synthetic resin having a high tensile strength as a base material. And a folding part that can be expanded in the axial direction is formed in the circumferential direction at a substantially central portion of the body part of the cylindrical body, and a concrete side block is formed on the outer peripheral surface of the body part on both sides of the folding part in the cylindrical body. On the inner periphery of the laminated concrete side block, using as a base material a jointed tubular sheet provided with an adhesive surface and a flexible sheet formed with a synthetic resin that breaks at least with a weaker force than the destruction of the concrete side block Corresponding and forming a cylindrical body having a width that fits between the concrete side lump bonding surfaces provided on the outer peripheral surface of the trunk portion on both sides of the folded portion in the jointed tubular sheet, and the outer peripheral surface of the trunk portion in the cylindrical body The concree Preparing a joint-sealed cylindrical seal as a side lump bonding surface, and placing and bonding the joint joint seal so as to straddle the joint inside the laminated concrete side lump, and then, A jointed tubular sheet is arranged so as to cover the jointed tubular seal inside the laminated concrete side lump, and one side of the concrete provided on the outer peripheral surface of the body portion on both sides of the folded portion Adhering the side lump adhesive surface to the inside of the upper concrete side lump and the other side of the concrete side lump adhering to the inside of the lower concrete side lump, so the joint part of the concrete side lump of the human hole by earthquake When the displacement width is small, the joint seal is deformed following the displacement of the joint portion of the concrete side block, and the displacement of the joint portion of the concrete side block of the human hole into the human hole Sediment and water flow It is possible to prevent.
And, when the displacement of the joint part of the concrete side block is so large that it exceeds the fracture strength of the concrete side block fixed by the joint seal, the joint seal breaks before the concrete side block breaks, Since it does not hinder the displacement of the side lumps, it can prevent the destruction of the concrete side lumps, and follows the displacement of the joint portion of the concrete side lumps, and is formed at the substantially central part of the trunk of the jointed tubular sheet. The folding part currently deform | transformed can prevent inflow of earth and sand and water into a human hole from the shift | offset | difference of the junction part of the concrete side block of a human hole.
In addition, since the jointed tubular sheet and the jointed tubular seal are both made of a flexible sheet, the jointed tubular sheet can be formed thinner than a conventional rubber, so that the internal space of the human hole can be prevented from being narrowed. Further, the weight can be reduced, the handling becomes easy, the fixing work to the concrete side block can be easily performed, and the cost can be reduced.

請求項2に記載の地震対応人孔保護工法によれば、請求項1に記載の、前記目地継ぎ筒状シート及び前記目地継ぎシールにおける前記コンクリート側塊接着面には合成繊維シートが溶着されているので、接着剤により前記目地継ぎ筒状シート及び前記目地継ぎシールにおける前記コンクリート側塊接着面をコンクリート側塊に接着したとき、合成繊維シートの繊維がアンカーとなって、前記目地継ぎ筒状シート及び前記目地継ぎシールにおける前記コンクリート側塊接着面をコンクリート側塊に強固に固定することができる。   According to the earthquake-resistant manhole protection method of claim 2, a synthetic fiber sheet is welded to the concrete side lump bonding surface of the joint joint tubular sheet and the joint joint seal of claim 1. Therefore, when the concrete side block bonding surface in the joint joint cylindrical sheet and the joint joint seal is bonded to the concrete side block by an adhesive, the fiber of the synthetic fiber sheet becomes an anchor, and the joint joint cylindrical sheet And the concrete side block adhesion surface in the joint joint seal can be firmly fixed to the concrete side block.

請求項3に記載の地震対応人孔保護工法によれば、請求項1または2に記載の、前記積層されたコンクリート側塊の上側のコンクリート側塊の内壁面の全部又は一部が錐体状の傾斜面となっているとき、前記目地継ぎ筒状シートの前記筒状体における前記折り畳み部の一側の胴部分の外壁面を前記上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成するとともに、前記目地継ぎ筒状シールの前記筒状体における胴部を軸方向に概ね2分し、一側の胴部分の外壁面を前記上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成するので、上側のコンクリート側塊の内壁面の全部又は一部が錐体状の傾斜面となっている前記積層されたコンクリート側塊の内側に接合部を跨ぐように前記目地継ぎ筒状シール及び前記目地継ぎ筒状シートを確実に接着し固定することができる。   According to the earthquake-resistant manhole protecting method according to claim 3, all or part of the inner wall surface of the concrete side block above the laminated concrete side block according to claim 1 or 2 is conical. The outer wall surface of the body portion on one side of the folded portion of the tubular body of the jointed tubular sheet corresponds to the cone-shaped inclined surface of the upper concrete side lump. The cylindrical portion of the tubular joint of the jointed tubular seal is roughly divided into two in the axial direction, and the outer wall surface of one barrel portion is formed on the upper concrete side lump. The laminated concrete side is formed on a cone-shaped inclined surface corresponding to the cone-shaped inclined surface, so that all or part of the inner wall surface of the upper concrete side block is a cone-shaped inclined surface. The jointed tubular case is placed so as to straddle the joint inside the lump. Le and the joint splicing tubular sheet can be reliably adhered and fixed.

請求項4に記載の地震対応人孔保護工法によれば、請求項3に記載の、前記積層されたコンクリート側塊の上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成された前記目地継ぎ筒状シートの前記筒状体における前記一側の胴部分の外壁面は、前記一側の胴部分を円周方向に沿って適宜間隔で且つ適宜角度の三角形に折り畳み前記一側の胴部分の開口部を縮径して形成され、また、前記積層されたコンクリート側塊の上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成された前記目地継ぎ筒状シールの前記筒状体における前記一側の胴部分は、の外壁面は、前記一側の胴部分を円周方向に沿って適宜間隔で且つ適宜角度の三角形に折り畳み前記一側の胴部分の開口部を縮径して形成されるので、前記目地継ぎ筒状シートの前記筒状体における前記一側の胴部分の外壁面及び前記目地継ぎ筒状シールの前記筒状体における前記一側の胴部分の外壁面を、前記上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に容易に形成することができる。   According to the earthquake-resistant manhole protection method according to claim 4, the cone-shaped corresponding to the cone-shaped inclined surface of the concrete side block above the laminated concrete side block according to claim 3. An outer wall surface of the one-side body portion of the tubular body of the joint-jointed tubular sheet formed on the inclined surface is a triangle having an appropriate interval and an appropriate angle along the circumferential direction of the one-side body portion. A cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the concrete side block on the upper side of the laminated concrete side block formed by reducing the diameter of the opening of the body portion on one side An outer wall surface of the cylindrical portion of the tubular body of the joint-sealed cylindrical seal formed on the one side is a triangle with an appropriate interval and an appropriate angle along the circumferential direction of the one side barrel portion. Because it is formed by reducing the diameter of the opening of the body portion on one side The outer wall surface of the one-side body portion of the tubular body of the jointed tubular sheet and the outer wall surface of the one-side body portion of the tubular body of the joint-jointed tubular seal are arranged on the upper concrete side. It can be easily formed on a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the lump.

本発明に係る地震対応人孔保護工法の実施の形態の第1例を実施した人孔のコンクリート側塊の接合部位を示す縦断面図である。It is a longitudinal cross-sectional view which shows the joining site | part of the concrete side block of the human hole which implemented the 1st example of embodiment of the earthquake corresponding human hole protection construction method which concerns on this invention. 本発明に係る地震対応人孔保護工法の実施の形態の第1例で使用される目地継ぎ筒状シートを示す一部切り欠き中間省略正面図である。It is a partially notched middle abbreviation front view showing a jointed tubular sheet used in the first example of the embodiment of the earthquake-resistant manhole protecting method according to the present invention. 目地継ぎ筒状シートに形成された折り畳み部の折り畳み形状の他例を示す一部切り欠き中間省略正面図である。It is a partially notched middle abbreviation front view which shows the other example of the folding shape of the folding part formed in the joint joint cylindrical sheet | seat. 本発明に係る地震対応人孔保護工法の実施の形態の第1例で使用される目地継ぎ筒状シールの一例を示す一部切り欠き中間省略正面図である。It is a partially notched middle abbreviation front view showing an example of a jointed cylindrical seal used in the 1st example of an embodiment of an earthquake correspondence manhole protection construction method concerning the present invention. 本発明に係る地震対応人孔保護工法の実施の形態の第2例を実施した人孔のコンクリート側塊の接合部位を示す縦断面図である。It is a longitudinal cross-sectional view which shows the junction part of the concrete side block of the human hole which implemented the 2nd example of embodiment of the earthquake-resistant manhole protection construction method which concerns on this invention. 本発明に係る地震対応人孔保護工法の実施の形態の第2例で使用される目地継ぎ筒状シートを示す一部切り欠き中間省略正面図である。It is a partially notched middle abbreviated front view showing a jointed tubular sheet used in the second example of the embodiment of the earthquake-resistant manhole protecting method according to the present invention. 図6に示す目地継ぎ筒状シートにおける折り畳み部の一側の胴部分の外壁面を錐体状の傾斜面に形成した構造を示す説明図である。It is explanatory drawing which shows the structure which formed the outer wall surface of the trunk | drum part of the one side of the folding part in the jointed cylindrical sheet | seat shown in FIG. 6 in the cone-shaped inclined surface. 第2例で使用される目地継ぎ筒状シートに形成された折り畳み部の折り畳み形状の他例を示す一部切り欠き中間省略正面図である。It is a partially notched middle abbreviation front view showing other examples of the folding shape of the folding part formed in the jointed tubular sheet used in the second example. 本発明に係る地震対応人孔保護工法の実施の形態の第2例で使用される目地継ぎ筒状シールの一例を示す一部切り欠き中間省略正面図である。It is a partially notched middle abbreviation front view showing an example of a jointed cylindrical seal used in the 2nd example of an embodiment of an earthquake correspondence manhole protection construction method concerning the present invention. 本発明に係る地震対応人孔保護工法の実施の形態の第3例で使用される目地継ぎ筒状シートを示す一部切り欠き中間省略正面図である。It is a partially notched middle abbreviation front view showing a jointed tubular sheet used in the third example of the embodiment of the earthquake-resistant manhole protecting method according to the present invention. 本発明に係る地震対応人孔保護工法の実施の形態の第3例で使用される目地継ぎ筒状シールの一例を示す一部切り欠き中間省略正面図である。It is a partially notched middle abbreviation front view showing an example of a jointed cylindrical seal used in the 3rd example of an embodiment of an earthquake correspondence manhole protection construction method concerning the present invention.

以下、本発明に係る地震対応人孔保護工法を実施するための形態を詳細に説明する。
図1乃至図4は本発明に係る地震対応人孔保護工法の実施の形態の第1例を示すもので、図1は本例を実施した人孔のコンクリート側塊の接合部位を示す縦断面図、図2は本例で使用される目地継ぎ筒状シートを示す一部切り欠き中間省略正面図、図3は目地継ぎ筒状シートに形成された折り畳み部の折り畳み形状の他例を示す一部切り欠き中間省略正面図、図4は本例で使用される目地継ぎ筒状シールの一例を示す一部切り欠き中間省略正面図である。
Hereinafter, the form for implementing the earthquake corresponding manhole protection construction method which concerns on this invention is demonstrated in detail.
FIG. 1 to FIG. 4 show a first example of an embodiment of the seismic manhole protection method according to the present invention, and FIG. 1 is a longitudinal section showing a joint portion of a concrete side block of a manhole embodying this example. 2 is a partially cutaway front view showing a jointed tubular sheet used in this example, and FIG. 3 is a view showing another example of the folded shape of the folding portion formed in the jointed tubular sheet. FIG. 4 is a partially cutaway intermediate omitted front view showing an example of a jointed cylindrical seal used in this example.

本例の地震対応人孔保護工法は、上下のコンクリート側塊1,2の内壁面3,4が鉛直面となって積層されたコンクリート側塊1,2に対応した地震対応人孔保護工法である。 先ず、引っ張り強度の強い合成樹脂で成形した可撓シートを基材として積層されたコンクリート1,2側塊の内周に対応する筒状体5を形成し、筒状体5の胴部の概ね中央部位に、軸方向に展開可能な折り畳み部6を周方向に形成し、筒状体5における折り畳み部6の両側の胴部分5a,5bの外周面にコンクリート側塊接着面7を設けた目地継ぎ筒状シート8と、少なくともコンクリート側塊1,2の破壊よりも弱い力で破断する合成樹脂で成形した可撓シートを基材として、積層されたコンクリート側塊1,2の内周に対応し且つ目地継ぎ筒状シート8における折り畳み部6の両側の胴部分5a,5bの外周面に設けたコンクリート側塊接着面7の間隔L1に収まる幅L2(L1>L2)の筒状体9を形成し、筒状体9における胴部外周面をコンクリート側塊接着面10とした目地継ぎ筒状シール11とを用意する。   The earthquake-resistant manhole protection method of this example is an earthquake-resistant manhole protection method corresponding to the concrete side blocks 1 and 2 laminated with the inner wall surfaces 3 and 4 of the upper and lower concrete side blocks 1 and 2 being vertical surfaces. is there. First, the cylindrical body 5 corresponding to the inner periphery of the concrete 1 and 2 side lumps laminated with a flexible sheet formed of a synthetic resin having a high tensile strength as a base material is formed. The joint part which formed the folding part 6 which can be expand | deployed to an axial direction in the center part in the circumferential direction, and provided the concrete side lump adhesion surface 7 in the outer peripheral surface of the trunk | drum parts 5a and 5b of the both sides of the folding part 6 in the cylindrical body 5. Corresponding to the inner circumference of laminated concrete side chunks 1 and 2, using as a base material a flexible sheet molded with a tubular sheet 8 and at least a synthetic resin that breaks with a weaker force than the destruction of the concrete side chunks 1 and 2 In addition, a cylindrical body 9 having a width L2 (L1> L2) that fits in the interval L1 between the concrete side lump bonding surfaces 7 provided on the outer peripheral surfaces of the body portions 5a and 5b on both sides of the folded portion 6 in the jointed tubular sheet 8 is provided. Forming and outer periphery of the body portion of the cylindrical body 9 The prepared and joint splicing tubular seal 11 that concrete side lump adhesive surface 10.

さらに詳細には、前記目地継ぎ筒状シート8にあっては、筒状体5の基材となる可撓シートを成形する合成樹脂として、本例ではポリプロピレン、ポリエチレン、ポリ塩化ビニル等が使用される。この基材は平坦な表面を有し、その厚さは、人孔のコンクリート側塊1,2の接合部Aがずれたとき、このずれにより人孔内に流入する土砂や水の予想流入圧に対応できる厚さに設定されている。   More specifically, in the jointed tubular sheet 8, polypropylene, polyethylene, polyvinyl chloride, or the like is used as a synthetic resin for forming a flexible sheet serving as a base material of the tubular body 5 in this example. The This base material has a flat surface, and when the joint A between the concrete side blocks 1 and 2 of the human hole is displaced, the estimated inflow pressure of earth and sand or water flowing into the human hole due to this displacement. It is set to a thickness that can handle

また、筒状体5の胴部の中央に形成された折り畳み部6は、本例では、図2に示すように胴部の内側に向かって胴部の中央部が下縁部側に折り返された後、上縁側に折り返されて形成されている。
この折り畳み部6の折り返し量は、折り畳まれた状態にある折り畳み部6が展開したとき、人孔のコンクリート側塊1,2の接合部Aのずれに追随できる量として設定されている。
従って、折り畳み部6の折り畳み形状は、人孔のコンクリート側塊1,2の接合部Aのずれに追随できる量が確保できる限り、前記の形状に限られるものではなく、例えば、図3に示すように折り畳み部6が胴部の内側に向かって胴部の中央部が上下縁部側に折り返された後、さらに中央側に折り返されたものでもよい。
Further, in this example, the folded portion 6 formed at the center of the barrel portion of the cylindrical body 5 is folded toward the lower edge portion toward the inner side of the barrel portion as shown in FIG. And then folded back to the upper edge side.
The folding amount of the foldable portion 6 is set as an amount that can follow the displacement of the joint portion A of the concrete side lumps 1 and 2 of the human hole when the folded portion 6 in the folded state is unfolded.
Therefore, the folding shape of the folding portion 6 is not limited to the above-mentioned shape as long as an amount that can follow the displacement of the joint portion A of the concrete side blocks 1 and 2 of the human hole can be secured. For example, as shown in FIG. In this way, the folded portion 6 may be folded further toward the center after the center portion of the body portion is folded back toward the upper and lower edges toward the inside of the body portion.

また、本例では、折り畳み部6の両側にある胴部分5a、5bの外周面に設けられたコンクリート側塊接着面7に合成繊維シート12が溶着されている。この合成繊維シート12は、本例ではポリプロピレン、ポリエチレン、ポリスチレン、ポリ塩化ビニル等の繊維が使用され、また、合成繊維シート12は、織布、不織布の何れであってもよい。
なお、本例では、合成繊維シート12は、折り畳み部6の両側の胴部分5a、5bの外周面に設けられたコンクリート側塊接着面7に溶着されているが、筒状体5の胴部外周全面に溶着されていてもよい(図示せず。)。
Moreover, in this example, the synthetic fiber sheet 12 is welded to the concrete side lump bonding surfaces 7 provided on the outer peripheral surfaces of the trunk portions 5 a and 5 b on both sides of the folding portion 6. In this example, the synthetic fiber sheet 12 uses fibers such as polypropylene, polyethylene, polystyrene, and polyvinyl chloride. The synthetic fiber sheet 12 may be a woven fabric or a non-woven fabric.
In this example, the synthetic fiber sheet 12 is welded to the concrete side lump bonding surfaces 7 provided on the outer peripheral surfaces of the body portions 5 a and 5 b on both sides of the folded portion 6, but the body portion of the tubular body 5. It may be welded to the entire outer periphery (not shown).

このように構成される目地継ぎ筒状シート8は次ぎのようにして製造される。
先ず、筒状体5の胴部幅となる所定幅の帯状の基材を、コンクリート側塊1,2の内周に対応する長さに切断し、筒状体5の外周面となる面で、基材の中央に形成する折り畳み部6の両側の胴部分5a,5bに設けられたコンクリート側塊接着面7となる面に、長さ方向一端部に溶着部位を残して合成繊維シート12を溶着する。
The jointed tubular sheet 8 configured as described above is manufactured as follows.
First, a belt-like base material having a predetermined width that is the body width of the cylindrical body 5 is cut into a length corresponding to the inner periphery of the concrete side chunks 1 and 2, and the surface that becomes the outer peripheral surface of the cylindrical body 5. The synthetic fiber sheet 12 is left on one end in the length direction on the surface to be the concrete side lump bonding surface 7 provided on the body portions 5a and 5b on both sides of the folding portion 6 formed in the center of the base material. Weld.

次に、合成繊維シート12を溶着した基材の中央に、筒状体5の外周面となる基材の面側に向かって基材の中央部を下縁部側に折り返した後、上側に折り返して折り畳み、加熱プレスして折り畳み部6を形成する。
このようにして、折り畳み部6を形成した基材を、合成繊維シート12を溶着した面側が外面となるように、その一端部の溶着部位に他端部を重ねて溶着することにより円筒状体とし、目地継ぎ筒状シート8を形成する。
Next, at the center of the base material on which the synthetic fiber sheet 12 is welded, the central portion of the base material is folded back to the lower edge side toward the surface side of the base material that is the outer peripheral surface of the cylindrical body 5, and then the upper side. The folding part 6 is formed by folding and folding and heating and pressing.
Thus, a cylindrical body is formed by welding the base material on which the folded portion 6 is formed, with the other end overlapped on the welding portion of one end thereof so that the surface side on which the synthetic fiber sheet 12 is welded becomes the outer surface. Then, the jointed tubular sheet 8 is formed.

また、前記目地継ぎ筒状シール11にあっては、筒状体9の基材となる可撓シートを成形する合成樹脂として、本例ではポリプロピレン、ポリエチレン、ポリ塩化ビニル等が使用される。この基材は平坦な表面を有し、その厚さはコンクリート側塊1,2の破壊よりも弱い力で破断する厚さに設定されている。   In the jointed tubular seal 11, polypropylene, polyethylene, polyvinyl chloride, or the like is used in this example as a synthetic resin for forming a flexible sheet serving as a base material of the tubular body 9. This base material has a flat surface, and its thickness is set to a thickness at which it breaks with a force weaker than that of the concrete side blocks 1 and 2.

また、本例では、筒状体9における胴部外周面であるコンクリート側塊接着面10に合成繊維シート13が溶着されている。この合成繊維シート13は、本例ではポリプロピレン、ポリエチレン、ポリスチレン、ポリ塩化ビニル等の繊維が使用され、また、合成繊維シート13は、織布、不織布の何れであってもよい。   Moreover, in this example, the synthetic fiber sheet 13 is welded to the concrete side lump bonding surface 10 which is the outer peripheral surface of the body portion of the cylindrical body 9. In this example, the synthetic fiber sheet 13 is made of a fiber such as polypropylene, polyethylene, polystyrene, or polyvinyl chloride. The synthetic fiber sheet 13 may be a woven fabric or a non-woven fabric.

このように構成される目地継ぎ筒状シール11は次ぎのようにして製造される。
先ず、筒状体9の胴部幅となる所定幅の帯状の基材を、コンクリート側塊1,2の内周に対応する長さに切断し、筒状体9の胴部外周面であるコンクリート側塊接着面10に、長さ方向一端部に溶着部位を残して合成繊維シート13を溶着する。
The jointed tubular seal 11 configured as described above is manufactured as follows.
First, a belt-like base material having a predetermined width, which becomes the body width of the cylindrical body 9, is cut to a length corresponding to the inner periphery of the concrete side chunks 1 and 2, and is the body outer peripheral surface of the tubular body 9. The synthetic fiber sheet 13 is welded to the concrete side lump bonding surface 10 while leaving a welding portion at one end in the length direction.

次に、合成繊維シート13を溶着した基材を、合成繊維シート13を溶着した面側が外面となるように、その一端部の溶着部位に他端部を重ねて溶着することにより円筒状体とし、目地継ぎ筒状シール11を形成する。   Next, the base material on which the synthetic fiber sheet 13 is welded is formed into a cylindrical body by welding the other end portion on the welded portion of one end portion so that the surface side on which the synthetic fiber sheet 13 is welded is the outer surface. The jointed tubular seal 11 is formed.

本例の地震対応人孔保護工法は、上記のように構成した目地継ぎ筒状シート8と目地継ぎ筒状シール11を用意し、先ず、目地継ぎシール11を、積層されたコンクリート側塊1,2の内側に接合部Aを跨ぐように配置し、合成繊維シート13が溶着されているコンクリート側塊接着面10をコンクリート側塊1,2の内側に接着剤で接着し固定する。
このとき、コンクリート側塊接着面10には合成繊維シート13が溶着されているので、接着剤によりコンクリート側塊接着面10をコンクリート側塊1,2に接着したとき、合成繊維シート13の繊維がアンカーとなってコンクリート側塊接着面10をコンクリート側塊1,2に強固に固定することができる。
The earthquake-resistant manhole protection method of this example prepares a jointed tubular sheet 8 and a jointed tubular seal 11 configured as described above. First, the jointed joint seal 11 is made of a laminated concrete side block 1, The concrete side block bonding surface 10 on which the synthetic fiber sheet 13 is welded is bonded and fixed to the inside of the concrete side blocks 1 and 2 with an adhesive.
At this time, since the synthetic fiber sheet 13 is welded to the concrete side lump bonding surface 10, when the concrete side lump bonding surface 10 is bonded to the concrete side lump 1 and 2 with an adhesive, the fibers of the synthetic fiber sheet 13 are The concrete side lump bonding surface 10 can be firmly fixed to the concrete side lumps 1 and 2 as an anchor.

次ぎに、前記目地継ぎ筒状シート8を、折り畳み部6が折り畳まれた状態でコンクリート側塊1,2の内側に、目地継ぎ筒状シール11を覆うように配置する。   Next, the jointed tubular sheet 8 is arranged inside the concrete side blocks 1 and 2 so as to cover the jointed tubular seal 11 in a state in which the folded portion 6 is folded.

そして、一側の胴部分5aの外周面に設けられた合成繊維シート12が溶着されているコンクリート側塊接着面7を上側のコンクリート側塊1の内側に接着剤で接着し、他側の胴部分5bの外周面に設けられた合成繊維シート12が溶着されているコンクリート側塊接着面7を下側のコンクリート側塊2の内側に接着剤で接着し固定する。
このとき、筒状体5における折り畳み部6の両側にある胴部分5a、5bの外周面に設けられたコンクリート側塊接着面7には合成繊維シート12が溶着されているので、接着剤によりコンクリート側塊接着面7をコンクリート側塊1,2に接着したとき、合成繊維シート12の繊維がアンカーとなって、コンクリート側塊接着面7をコンクリート側塊1,2に強固に固定することができる。
このようにして第1例の地震対応人孔保護工法の実施が完了する(図1参照。)。
Then, the concrete side lump bonding surface 7 to which the synthetic fiber sheet 12 provided on the outer peripheral surface of the one side cylinder portion 5a is welded is bonded to the inside of the upper concrete side lump 1 with an adhesive, and the other side cylinder The concrete side lump bonding surface 7 on which the synthetic fiber sheet 12 provided on the outer peripheral surface of the portion 5b is welded is fixed to the inside of the lower concrete side lump 2 with an adhesive.
At this time, since the synthetic fiber sheet 12 is welded to the concrete side lump bonding surfaces 7 provided on the outer peripheral surfaces of the trunk portions 5a and 5b on both sides of the folding portion 6 in the cylindrical body 5, the concrete is adhered by the adhesive. When the side lump bonding surface 7 is bonded to the concrete side lump 1 and 2, the fibers of the synthetic fiber sheet 12 become anchors, and the concrete side lump bonding surface 7 can be firmly fixed to the concrete side lump 1 and 2. .
In this way, the implementation of the earthquake-resistant manhole protection method of the first example is completed (see FIG. 1).

上記第1例の地震対応人孔保護工法によれば、地震により人孔のコンクリート側塊1,2の接合部Aがずれたとき、そのずれ幅が小さい場合は、目地継ぎシール11がコンクリート側塊1,2の接合部Aのずれに追随して変形し、人孔のコンクリート側塊1,2の接合部Aのずれから人孔内への土砂や水の流入を防ぐ。   According to the earthquake-resistant manhole protection method of the first example, when the joint A of the concrete side blocks 1 and 2 of the manhole is displaced due to the earthquake, the joint joint seal 11 is on the concrete side when the displacement width is small. It deforms following the displacement of the joint portion A of the masses 1 and 2 and prevents inflow of earth and sand and water from the displacement of the joint portion A of the concrete side masses 1 and 2 of the human hole.

そして、コンクリート側塊1,2の接合部Aのずれが、目地継ぎシール11で固定されたコンクリート側塊1,2の破壊強度を超えるほど大きい場合、コンクリート側塊1,2の破壊の前に目地継ぎシール11が破断するので、コンクリート側塊1,2のずれの妨げとならず、コンクリート側塊1,2の破壊を防止することができ、そして、コンクリート側塊1,2の接合部Aのずれに追随して目地継ぎ筒状シート8の折り畳み部6が変形し、人孔のコンクリート側塊1,2の接合部Aのずれから人孔内への土砂や水の流入を防ぐ。   If the displacement of the joint A of the concrete side blocks 1 and 2 is large enough to exceed the breaking strength of the concrete side blocks 1 and 2 fixed by the joint joint seal 11, before the concrete side blocks 1 and 2 are broken. Since the joint seal 11 is broken, it does not hinder the displacement of the concrete side blocks 1 and 2, can prevent the concrete side blocks 1 and 2 from being broken, and the joint A of the concrete side blocks 1 and 2. The folding portion 6 of the jointed tubular sheet 8 is deformed following the displacement of the joint, and prevents inflow of earth and sand and water from the displacement of the joint portion A of the concrete side blocks 1 and 2 of the manhole.

また本例では、目地継ぎ筒状シート8及び目地継ぎ筒状シール11におけるコンクリート側塊接着面7,10には合成繊維シート12,13が溶着されているので、接着剤により目地継ぎ筒状シート8及び前記目地継ぎ筒状シール11におけるコンクリート側塊接着面7,10をコンクリート側塊1,2に接着したとき、合成繊維シート12,13の繊維がアンカーとなって、目地継ぎ筒状シート8及び目地継ぎ筒状シール11におけるコンクリート側塊接着面7,10をコンクリート側塊1,2に強固に固定することができる。   Moreover, in this example, since the synthetic fiber sheets 12 and 13 are welded to the concrete side lump bonding surfaces 7 and 10 in the jointed tubular sheet 8 and the jointed tubular seal 11, the jointed tubular sheet is bonded with an adhesive. 8 and when the concrete side block bonding surfaces 7 and 10 in the jointed tubular seal 11 are bonded to the concrete side blocks 1 and 2, the fibers of the synthetic fiber sheets 12 and 13 serve as anchors, and the jointed tubular sheet 8 And the concrete side lump bonding surfaces 7 and 10 in the jointed cylindrical seal 11 can be firmly fixed to the concrete side lumps 1 and 2.

図5乃至図9は本発明に係る地震対応人孔保護工法の実施の形態の第2例を示すもので、図5は本例を実施した人孔のコンクリート側塊の接合部位を示す縦断面図、図6は本例で使用される目地継ぎ筒状シートを示す一部切り欠き中間省略正面図、図7は図6に示す目地継ぎ筒状シートにおける折り畳み部の一側の胴部分の外壁面を錐体状の傾斜面に形成した構造を示す説明図、図8は本例で使用される目地継ぎ筒状シートに形成された折り畳み部の折り畳み形状の他例を示す一部切り欠き中間省略正面図、図9は本例で使用される目地継ぎ筒状シールの一例を示す一部切り欠き中間省略正面図である。
本例の地震対応人孔保護工法は、前記第1例と基本構成において変わるところが無く、第1例と同一の構成については同一の符号を付し、その詳細は第1例の説明を援用する。
FIGS. 5 to 9 show a second example of the embodiment of the seismic manhole protecting method according to the present invention, and FIG. 5 is a longitudinal sectional view showing the joint portion of the concrete side block of the manhole embodying the present example. FIG. 6 is a partially cutaway front view of the jointed tubular sheet used in the present embodiment, and FIG. 7 is an outside view of the body portion on one side of the folded portion of the jointed tubular sheet shown in FIG. FIG. 8 is an explanatory view showing a structure in which the wall surface is formed as a cone-shaped inclined surface, and FIG. 8 is a partially cutaway intermediate showing another example of the folding shape of the folding portion formed in the jointed tubular sheet used in this example FIG. 9 is an abbreviated front view, and FIG. 9 is a partially cutaway intermediate abbreviated front view showing an example of a jointed tubular seal used in this example.
The earthquake-resistant manhole protection method of this example has no difference in the basic configuration from the first example, the same reference numerals are given to the same configurations as the first example, and the details of the first example are used for the details. .

本例の地震対応人孔保護工法は、上側のコンクリート側塊1の内壁面3の全部が円錐の錐体状の傾斜面となっている積層されたコンクリート側塊1,2に対応した地震対応人孔保護工法である。
本例にあっても、第1例と同様、目地継ぎ筒状シート8と目地継ぎ筒状シール11を用意する。
目地継ぎ筒状シート8と目地継ぎ筒状シール11にあって、第1例との違いは、目地継ぎ筒状シート8の筒状体5における折り畳み部6の一側の胴部分5aの外壁面14を上側のコンクリート側塊1の錐体状の傾斜面に対応する錐体状の傾斜面に形成し、そして、目地継ぎ筒状シール11の筒状体9における胴部を軸方向に概ね2分し、一側の胴部分9aの外壁面15を上側のコンクリート側塊1の錐体状の傾斜面に対応する錐体状の傾斜面に形成する点だけである。
The seismic manhole protection method of this example is for earthquakes corresponding to stacked concrete side blocks 1 and 2 in which the entire inner wall surface 3 of the upper concrete side block 1 is a conical cone-shaped inclined surface. It is a manhole protection method.
Even in this example, the jointed tubular sheet 8 and the jointed tubular seal 11 are prepared as in the first example.
In the jointed tubular sheet 8 and the jointed tubular seal 11, the difference from the first example is that the outer wall surface of the body portion 5 a on one side of the folded portion 6 in the tubular body 5 of the jointed tubular sheet 8. 14 is formed in a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the upper concrete side block 1, and the body portion of the tubular body 9 of the jointed tubular seal 11 is approximately 2 in the axial direction. In other words, the outer wall surface 15 of the body portion 9a on one side is only formed on a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the upper concrete side block 1.

このように構成される目地継ぎ筒状シート8と目地継ぎ筒状シール11は次のようにして製造される。
目地継ぎ筒状シート8にあっては、第1例の目地継ぎ筒状シート8を使用し、筒状体5における折り畳み部6の一側の胴部分5a、本例では上側となる一側の胴部分5aを、図6に示すように、円周方向に沿って適宜間隔で且つ適宜角度の略三角形に折り返して折り畳んで縮径用折り畳み部16を設けて一側の胴部分5aの開口部を縮径させ、一側の胴部分5aの外壁面14が上側のコンクリート側塊1の錐体状の傾斜面に対応する錐体状の傾斜面となるように形成する。
前記一側の胴部分5aに設けた縮径用折り畳み部16は、胴部分5aを略三角形に折り返し加熱プレスして折り畳み、溶着して固定している。
The jointed tubular sheet 8 and the jointed tubular seal 11 configured as described above are manufactured as follows.
In the jointed tubular sheet 8, the jointed tubular sheet 8 of the first example is used, and the trunk portion 5 a on one side of the folded portion 6 in the tubular body 5, which is the upper side in this example. As shown in FIG. 6, the trunk portion 5a is folded back into a substantially triangular shape at an appropriate interval and at an appropriate angle along the circumferential direction to fold the trunk portion 5a, thereby providing a reduced diameter folding portion 16 to open the trunk portion 5a on one side. The outer wall surface 14 of the body portion 5a on one side is formed to be a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the upper concrete side lump 1.
The reduced-diameter folding portion 16 provided on the one-side body portion 5a is folded and heat-pressed by folding the body portion 5a into a substantially triangular shape, and is fixed by welding.

目地継ぎ筒状シール11にあっては、第1例の目地継ぎ筒状シール11を使用し、図6に示す目地継ぎ筒状シート8と同様に、筒状体9における一側の胴部分9a、本例では上側となる一側の胴部分9aを、円周方向に沿って適宜間隔で且つ適宜角度の略三角形に折り返して折り畳んで縮径用折り畳み部17を設けて一側の胴部分9aの開口部を縮径させ、一側の胴部分9aの外壁面15が上側のコンクリート側塊1の錐体状の傾斜面に対応する錐体状の傾斜面となるように形成する。
前記一側の胴部分9aに設けた縮径用折り畳み部17は、胴部分9aを略三角形に折り返し加熱プレスして折り畳み、溶着して固定している。
In the jointed tubular seal 11, the jointed tubular seal 11 of the first example is used, and similarly to the jointed tubular sheet 8 shown in FIG. 6, the trunk portion 9 a on one side of the tubular body 9. In this example, the upper side barrel portion 9a is folded back into a substantially triangular shape at an appropriate interval and at an appropriate angle along the circumferential direction, and is provided with a reduced diameter folding portion 17 to provide the lower side barrel portion 9a. The outer wall surface 15 of the body portion 9a on one side is formed so as to be a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the upper concrete side lump 1.
The reduced-diameter folding portion 17 provided on the one-side body portion 9a is folded and heat-pressed by folding the body portion 9a into a substantially triangular shape, and is fixed by welding.

本例の地震対応人孔保護工法は、上記のように構成した目地継ぎ筒状シート8と目地継ぎ筒状シール11を用意し、先ず、目地継ぎ筒状シール11を、外壁面15が錐体状の傾斜面に形成されている一側の胴部分9aを上向きとして、上側のコンクリート側塊1の内壁面3が錐体状の傾斜面となっているコンクリート側塊1,2の内側に、コンクリート側塊1,2の接合部Aを跨ぐように配置する。   The earthquake-resistant manhole protection method of this example prepares the jointed tubular sheet 8 and the jointed tubular seal 11 configured as described above. First, the jointed tubular seal 11 and the outer wall surface 15 are conical. The inner side wall 3 of the upper concrete side block 1 is a cone-shaped inclined surface on the inside of the concrete side blocks 1 and 2, with the one side barrel portion 9 a formed on the inclined surface facing upward. It arrange | positions so that the junction part A of the concrete side blocks 1 and 2 may be straddled.

そして、一側の胴部分9aの外周面からなる合成繊維シート13が溶着されているコンクリート側塊接着面10を上側のコンクリート側塊1の内側に接着剤で接着し、他側の胴部分9bの外周面からなる合成繊維シート13が溶着されているコンクリート側塊接着面10を下側のコンクリート側塊2の内側に接着剤で接着し固定する。
このとき、コンクリート側塊接着面10には合成繊維シート13が溶着されているので、接着剤によりコンクリート側塊接着面10をコンクリート側塊1,2に接着したとき、合成繊維シート13の繊維がアンカーとなって、コンクリート側塊接着面10をコンクリート側塊1,2に強固に固定することができる。
Then, the concrete side lump bonding surface 10 to which the synthetic fiber sheet 13 composed of the outer peripheral surface of the one side barrel portion 9a is welded is adhered to the inside of the upper concrete side lump 1 with an adhesive, and the other side barrel portion 9b. The concrete side lump adhesive surface 10 to which the synthetic fiber sheet 13 composed of the outer peripheral surface of the concrete side is welded and fixed to the inside of the lower concrete side lump 2 with an adhesive.
At this time, since the synthetic fiber sheet 13 is welded to the concrete side lump bonding surface 10, when the concrete side lump bonding surface 10 is bonded to the concrete side lump 1 and 2 with an adhesive, the fibers of the synthetic fiber sheet 13 are It becomes an anchor and the concrete side lump adhesion surface 10 can be firmly fixed to the concrete side lump 1 and 2.

次ぎに、前記目地継ぎ筒状シート8を、折り畳み部6が折り畳まれた状態で、且つ外壁面14が錐体状の傾斜面に形成されている一側の胴部分5aを上向きとして、前記コンクリート側塊1,2の内側に、目地継ぎシール筒状11を覆うように配置する。   Next, with the jointed tubular sheet 8 in a state in which the folded portion 6 is folded and the outer wall surface 14 is formed as a cone-shaped inclined surface, the one-side trunk portion 5a faces upward. It arrange | positions so that the joint joint cylinder 11 may be covered inside the side chunks 1 and 2. FIG.

そして、一側の胴部分5aの外周面に設けられた合成繊維シート12が溶着されているコンクリート側塊接着面7を上側のコンクリート側塊1の内側に接着剤で接着し、他側の胴部分5bの外周面に設けられた合成繊維シート12が溶着されているコンクリート側塊接着面7を下側のコンクリート側塊2の内側に接着剤で接着し固定する。
このとき、筒状体5における折り畳み部6の両側にある胴部分5a、5bの外周面に設けられたコンクリート側塊接着面7には合成繊維シート12が溶着されているので、接着剤によりコンクリート側塊接着面7をコンクリート側塊1,2に接着したとき、合成繊維シート12の繊維がアンカーとなって、コンクリート側塊接着面7をコンクリート側塊1,2に強固に固定することができる。
このようにして第2例の地震対応人孔保護工法の実施が完了する(図5参照。)。
Then, the concrete side lump bonding surface 7 to which the synthetic fiber sheet 12 provided on the outer peripheral surface of the one side cylinder portion 5a is welded is bonded to the inside of the upper concrete side lump 1 with an adhesive, and the other side cylinder The concrete side lump bonding surface 7 on which the synthetic fiber sheet 12 provided on the outer peripheral surface of the portion 5b is welded is fixed to the inside of the lower concrete side lump 2 with an adhesive.
At this time, since the synthetic fiber sheet 12 is welded to the concrete side lump bonding surfaces 7 provided on the outer peripheral surfaces of the trunk portions 5a and 5b on both sides of the folding portion 6 in the cylindrical body 5, the concrete is adhered by the adhesive. When the side lump bonding surface 7 is bonded to the concrete side lump 1 and 2, the fibers of the synthetic fiber sheet 12 become anchors, and the concrete side lump bonding surface 7 can be firmly fixed to the concrete side lump 1 and 2. .
In this way, the implementation of the earthquake-resistant manhole protection method of the second example is completed (see FIG. 5).

上記第2例の地震対応人孔保護工法によれば、上側のコンクリート側塊1の内壁面2の全部が錐体状の傾斜面となっている積層されたコンクリート側塊1,2の内側に接合部Aを跨ぐように目地継ぎ筒状シール8及び目地継ぎ筒状シート11を確実に接着し固定することができる。
その他の作用効果は前記した第1例と同様なので、第1例の説明を援用する。
According to the earthquake-resistant manhole protection method of the second example, the inner wall surface 2 of the upper concrete side block 1 is formed inside the laminated concrete side blocks 1 and 2 in which all of the inner wall surfaces 2 are cone-shaped inclined surfaces. The jointed tubular seal 8 and the jointed tubular sheet 11 can be reliably bonded and fixed so as to straddle the joint A.
Since other operational effects are the same as those of the first example described above, the description of the first example is cited.

図10は本発明に係る地震対応人孔保護工法の実施の形態の第3例で使用される目地継ぎ筒状シートを示す一部切り欠き中間省略正面図、図11は本発明に係る地震対応人孔保護工法の実施の形態の第3例で使用される目地継ぎ筒状シールの一例を示す一部切り欠き中間省略正面図である。
第3例の地震対応人孔保護工法は、上側のコンクリート側塊1の内壁面3の一部が円錐の錐体状の傾斜面となっている積層されたコンクリート側塊1,2に対応した地震対応人孔保護工法である。
本例の地震対応人孔保護工法は、前記第2例と基本構成において変わるところが無く、第2例と同一の構成については同一の符号を付し、その詳細は第2例の説明を援用する。
FIG. 10 is a partially cut-away middle front view showing a jointed tubular sheet used in the third example of the embodiment of the earthquake-resistant manhole protection method according to the present invention, and FIG. 11 is an earthquake response according to the present invention. It is a partially notched middle abbreviation front view showing an example of a jointed cylindrical seal used in the 3rd example of an embodiment of a manhole protection construction method.
The seismic manhole protection method of the third example corresponds to the laminated concrete side blocks 1 and 2 in which a part of the inner wall surface 3 of the upper concrete side block 1 is a conical cone-shaped inclined surface. It is an earthquake-resistant manhole protection method.
The earthquake-resistant manhole protection method of the present example is the same as the second example in the basic configuration, the same components as those in the second example are denoted by the same reference numerals, and the description of the second example is used for details. .

本例にあっても、第2例と同様、目地継ぎ筒状シート8と目地継ぎ筒状シール11を用意する。目地継ぎ筒状シート8と目地継ぎ筒状シール11にあって、第2例との違いは、目地継ぎ筒状シート8の筒状体5における折り畳み部6の一側の胴部分5aの外壁面14の一部を、内壁面3の一部が円錐の錐体状の傾斜面と上側のコンクリート側塊1の傾斜面に対応する錐体状の傾斜面に形成し、そして、目地継ぎ筒状シール11の筒状体9における胴部を軸方向に概ね2分し、一側の胴部分9aの外壁面15の一部を、内壁面3の一部が円錐の錐体状の傾斜面と上側のコンクリート側塊1の傾斜面に対応する錐体状の傾斜面に形成する点だけである。
このように構成される目地継ぎ筒状シート8と目地継ぎ筒状シール11は第2例の目地継ぎ筒状シート8と目地継ぎ筒状シール11と同様にして製造される。
Even in this example, the jointed tubular sheet 8 and the jointed tubular seal 11 are prepared as in the second example. The jointed tubular sheet 8 and the jointed tubular seal 11 are different from the second example in that the outer wall surface of the body portion 5a on one side of the folded portion 6 in the tubular body 5 of the jointed tubular sheet 8 A part of the inner wall surface 3 is formed into a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the cone and the inclined surface of the upper concrete side block 1, and a jointed tubular shape A cylindrical portion of the cylindrical body 9 of the seal 11 is roughly divided into two in the axial direction, a part of the outer wall surface 15 of the barrel part 9a on one side, a cone-shaped inclined surface with a part of the inner wall surface 3 being conical. It is only the point formed in the cone-shaped inclined surface corresponding to the inclined surface of the upper concrete side lump 1.
The jointed tubular sheet 8 and the jointed tubular seal 11 configured as described above are manufactured in the same manner as the jointed tubular sheet 8 and the jointed tubular seal 11 of the second example.

本例の地震対応人孔保護工法は、上記のように構成した目地継ぎ筒状シート8と目地継ぎ筒状シール11を用意し、第2例と同様にして目地継ぎ筒状シート8と目地継ぎ筒状シール11を上側のコンクリート側塊1の内壁面3の一部が錐体状の傾斜面となっているコンクリート側塊1,2の内側に接着剤で接着し固定する。
本例の作用効果は前記した第2例と同様なので、第2例の説明を援用する。
The seismic manhole protection method of this example prepares the jointed tubular sheet 8 and the jointed tubular seal 11 configured as described above, and jointed the tubular sheet 8 and the jointed joint as in the second example. The cylindrical seal 11 is bonded and fixed to the inside of the concrete side blocks 1 and 2 in which a part of the inner wall surface 3 of the upper concrete side block 1 is a cone-shaped inclined surface with an adhesive.
Since the effect of this example is the same as that of the second example described above, the description of the second example is cited.

なお、本発明に係る地震対応人孔保護工法は、第1例では、コンクリート側塊1,2の内壁面3,4の内周が円状となっているが、角状のコンクリート側塊1,2にも対応できる。また、第2例、第3例では、いずれも上側のコンクリート側塊1の内壁面3の全部または一部が円錐の錐体状の傾斜面となっているが、上側のコンクリート側塊1の内壁面3の全部一部が角錐の錐体状の傾斜面となっている積層されたコンクリート側塊にも対応できる。この場合の地震対応目地継ぎ手は、図示しないが、前記第1例、第2例、第3例に示す目地継ぎ筒状シート8と目地継ぎ筒状シール11を角筒状に設計変更するだけで済む。   In addition, in the 1st example, although the inner periphery of the inner wall surfaces 3 and 4 of the concrete side blocks 1 and 2 is circular in the first example, the seismic manhole protection method according to the present invention is a square concrete side block 1. , 2 can also be supported. In the second example and the third example, all or part of the inner wall surface 3 of the upper concrete side block 1 is a conical cone-shaped inclined surface. It is also possible to deal with laminated concrete side blocks in which a part of the inner wall surface 3 is a pyramid-shaped inclined surface of a pyramid. The earthquake joint joint in this case is not shown in the figure, but the joint joint tubular sheet 8 and joint joint tubular seal 11 shown in the first example, the second example, and the third example are simply changed to a square tubular design. That's it.

また、図示していないが、前記第1例、第2例、第3例にあって、目地継ぎ筒状シート8となる筒状体5に形成した折り畳み部6に、筒状体5を形成する基材となる可撓シートよりも破断強度の弱い放水用弱化部を設けておくこともできる。
放水用弱化部は筒状体5の折り畳み部6の一部に薄肉部を形成し、この薄肉部を放水用弱化部としてもよく、または折り畳み部6の一部を開口し、開口部に可撓シートよりも破断強度の弱い可撓シートを溶着して、該部を放水用弱化部としてもよい。
また、放水用弱化部にあっては、その破断強度は筒状体5を形成する基材となる可撓シートよりも僅かに弱い程度であることが好ましい。
このように、目地継ぎ筒状シート8となる筒状体5に形成した折り畳み部6に、筒状体5を形成する基材となる可撓シートよりも破断強度の弱い放水用弱化部を設けておくことにより、コンクリート側塊1,2の接合部Aのずれから人孔内へ流入した水の水圧が折り畳み部6に、筒状体5を形成する基材となる可撓シートの破断強度を超えるような水圧となって掛かった場合、折り畳み部6に設けた放水用弱化部が破断して人孔内へ流入した水が折り畳み部6から放水され、水圧による折り畳み部6の破断を防止できる。
Although not shown, the tubular body 5 is formed in the folding portion 6 formed in the tubular body 5 that becomes the jointed tubular sheet 8 in the first example, the second example, and the third example. It is also possible to provide a water discharge weakening portion having a breaking strength that is weaker than that of the flexible sheet to be the base material.
The water discharge weakening portion may be formed with a thin wall portion in a part of the folded portion 6 of the cylindrical body 5, and this thin wall portion may be used as the water discharge weakening portion, or a part of the folding portion 6 may be opened to be openable. A flexible sheet having a breaking strength lower than that of the flexible sheet may be welded, and the part may be used as a water discharge weakening part.
Moreover, in the weakening part for water discharge, it is preferable that the breaking strength is a little weaker than the flexible sheet used as the base material which forms the cylindrical body 5.
In this manner, the folding portion 6 formed on the tubular body 5 that becomes the jointed tubular sheet 8 is provided with a water discharge weakening portion that has a lower breaking strength than the flexible sheet that is the base material that forms the tubular body 5. The water pressure of the water that has flowed into the human hole from the displacement of the joint A of the concrete side blocks 1 and 2 causes the folding sheet 6 to have the breaking strength of the flexible sheet serving as the base material for forming the cylindrical body 5. When the water pressure exceeds the water level, the water discharge weakening part provided in the folding part 6 breaks and the water that flows into the human hole is discharged from the folding part 6 to prevent the folding part 6 from being broken by water pressure. it can.

また、本発明に係る地震対応人孔保護工法は、人孔に限らず、地下に埋設した埋設管の接合部に配置することにより、地震対応埋設管保護工法としても適用できる。   Moreover, the earthquake-resistant manhole protection construction method according to the present invention is not limited to the manhole, but can also be applied as an earthquake-resistant buried tube protection method by arranging it at the junction of the buried pipe buried underground.

1、2 コンクリート側塊
3、4 内壁面
5 筒状体
5a 一側(上側)の胴部分
5b 他側(下側)の胴部分
6 折り畳み部
7 コンクリート側塊接着面
8 目地継ぎ筒状シート
9 筒状体
9a 一側(上側)の胴部分
9b 他側(下側)の胴部分
10 コンクリート側塊接着面
11 目地継ぎ筒状シール
12、13 合成繊維シート
14、15 外壁面
16、17 縮径用折り畳み部
A 接合部
L1 地継ぎ筒状シートにおける折り畳み部の両側の胴部分の外周面に設けたコンクリー ト側塊接着面の間隔
L2 目地継ぎ筒状シールにおける筒状体の幅
DESCRIPTION OF SYMBOLS 1, 2 Concrete side block 3, 4 Inner wall surface 5 Tubular body 5a One side (upper side) trunk | drum part 5b The other side (lower side) trunk | drum part 6 Folding part 7 Concrete side lump adhesion surface 8 Jointed cylindrical sheet 9 Cylindrical body 9a One side (upper side) barrel portion 9b The other side (lower side) barrel portion 10 Concrete side lump bonding surface 11 Jointed cylindrical seals 12, 13 Synthetic fiber sheets 14, 15 Outer wall surfaces 16, 17 Folding part A Joint part L1 Interval of the concrete side lump adhering surface provided on the outer peripheral surface of the body part on both sides of the folded part in the jointed tubular sheet L2 Width of the tubular body in the jointed tubular seal

Claims (4)

積層されたコンクリート側塊の接合部の耐震化を図る地震対応人孔保護工法であって、 引っ張り強度の強い合成樹脂で成形した可撓シートを基材として前記積層されたコンクリート側塊の内周に対応する筒状体を形成し、前記筒状体の胴部の概ね中央部位に、軸方向に展開可能な折り畳み部を周方向に形成し、前記筒状体における前記折り畳み部の両側の胴部分の外周面にコンクリート側塊接着面を設けた目地継ぎ筒状シートと、少なくとも前記コンクリート側塊の破壊よりも弱い力で破断する合成樹脂で成形した可撓シートを基材として、前記積層されたコンクリート側塊の内周に対応し且つ前記目地継ぎ筒状シートにおける折り畳み部の両側の胴部分の外周面に設けたコンクリート側塊接着面の間に収まる幅の筒状体を形成し、前記筒状体における胴部外周面をコンクリート側塊接着面とした目地継ぎ筒状シールとを用意し、
前記目地継ぎ筒状シールを、前記積層されたコンクリート側塊の内側に接合部を跨ぐように配置し接着して固定し、次ぎに、前記目地継ぎ筒状シートを、前記積層されたコンクリート側塊の内側に前記目地継ぎ筒状シールを覆うように配置し、前記折り畳み部の両側の胴部分の外周面に設けた何れか一側のコンクリート側塊接着面を上側のコンクリート側塊の内側に、他側のコンクリート側塊接着面を下側のコンクリート側塊の内側に接着して固定することを特徴とする地震対応人孔保護工法。
An earthquake-resistant manhole protecting method for seismicizing the joints of laminated concrete side blocks, and using a flexible sheet molded from a synthetic resin with high tensile strength as the base material, the inner circumference of the laminated concrete side blocks A foldable portion expandable in the axial direction is formed in a circumferential direction at a substantially central portion of the barrel portion of the cylindrical body, and the barrels on both sides of the foldable portion in the cylindrical body are formed. The laminated sheet is formed by using a jointed tubular sheet having a concrete side lump adhesive surface on the outer peripheral surface of the part and a flexible sheet formed of a synthetic resin that breaks with at least a force weaker than the destruction of the concrete side lump. Forming a cylindrical body having a width corresponding to the inner periphery of the concrete side lump and being fitted between the concrete side lump bonding surfaces provided on the outer peripheral surfaces of the body portions on both sides of the folded portion in the jointed tubular sheet, Tubular Prepare a jointed tubular seal with the body outer peripheral surface of the body as a concrete side lump bonding surface,
The jointed tubular seal is disposed and bonded and fixed inside the laminated concrete side block so as to straddle the joint, and then the jointed tubular sheet is attached to the laminated concrete side piece. It is arranged so as to cover the jointed cylindrical seal inside, and one side of the concrete side lump bonding surface provided on the outer peripheral surface of the body portion on both sides of the folded portion is inside the upper concrete side lump, An earthquake-resistant manhole protection method characterized by adhering and fixing the other side concrete side lump adhesion surface to the inside of the lower side concrete lump.
前記目地継ぎ筒状シート及び前記目地継ぎシールにおける前記コンクリート側塊接着面には合成繊維シートが溶着されていることを特徴とする請求項1に記載の地震対応人孔保護工法。   The earthquake-resistant manhole protection method according to claim 1, wherein a synthetic fiber sheet is welded to the concrete side lump adhesion surface of the jointed tubular sheet and the jointed seal. 前記積層されたコンクリート側塊の上側のコンクリート側塊の内壁面の全部又は一部が錐体状の傾斜面となっているとき、前記目地継ぎ筒状シートの前記筒状体における前記折り畳み部の一側の胴部分の外壁面を前記上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成するとともに、前記目地継ぎ筒状シールの前記筒状体における胴部を軸方向に概ね2分し、一側の胴部分の外壁面を前記上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成することを特徴とする請求項1または2に記載の地震対応人孔保護工法。   When all or part of the inner wall surface of the concrete side block on the upper side of the laminated concrete side block is a cone-shaped inclined surface, the folding portion of the tubular body of the jointed tubular sheet The outer wall surface of the barrel portion on one side is formed into a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the upper concrete side block, and the barrel portion of the tubular body of the jointed tubular seal is formed The outer wall surface of the body portion on one side is formed into a cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the upper concrete side block. The earthquake-resistant manhole protection method described in 1 or 2. 前記積層されたコンクリート側塊の上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成された前記目地継ぎ筒状シートの前記筒状体における前記一側の胴部分の外壁面は、前記一側の胴部分を円周方向に沿って適宜間隔で且つ適宜角度の三角形に折り畳み前記一側の胴部分の開口部を縮径して形成され、また、前記積層されたコンクリート側塊の上側のコンクリート側塊の錐体状の傾斜面に対応する錐体状の傾斜面に形成された前記目地継ぎ筒状シールの前記筒状体における前記一側の胴部分の外壁面は、前記一側の胴部分を円周方向に沿って適宜間隔で且つ適宜角度の三角形に折り畳み前記一側の胴部分の開口部を縮径して形成されることを特徴とする請求項3に記載の地震対応人孔保護工法。   The cylinder on the one side of the tubular body of the jointed tubular sheet formed on the cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the concrete side block on the upper side of the laminated concrete side block. The outer wall surface of the portion is formed by folding the one-side body portion into a triangular shape at an appropriate interval and at an appropriate angle along the circumferential direction, and reducing the diameter of the opening portion of the one-side body portion. Of the barrel portion on the one side of the tubular body of the joint-sealed tubular seal formed on the cone-shaped inclined surface corresponding to the cone-shaped inclined surface of the concrete side block on the upper side of the concrete side block formed The outer wall surface is formed by folding the one-side body portion into a triangular shape at an appropriate interval and an appropriate angle along the circumferential direction, and reducing the diameter of the opening of the one-side body portion. Item 4. The earthquake-resistant manhole protection method described in item 3.
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