JP2020190112A - Manhole joint water-cutoff method - Google Patents

Manhole joint water-cutoff method Download PDF

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JP2020190112A
JP2020190112A JP2019095602A JP2019095602A JP2020190112A JP 2020190112 A JP2020190112 A JP 2020190112A JP 2019095602 A JP2019095602 A JP 2019095602A JP 2019095602 A JP2019095602 A JP 2019095602A JP 2020190112 A JP2020190112 A JP 2020190112A
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water
peripheral groove
joint
concrete side
groove portion
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JP7308381B2 (en
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今▲崎▼　雄司
Yuji Imazaki
雄司 今▲崎▼
陽 保坂
Akira Hosaka
陽 保坂
清宏 谷津
Kiyohiro Tanitsu
清宏 谷津
聡 南澤
Satoshi Minamizawa
聡 南澤
和輝 飯田
Kazuki Iida
和輝 飯田
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Tokyo Metropolitan Sewerage Service Corp
Nippon Koei Co Ltd
Nippon Hume Corp
Maithick Co
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Tokyo Metropolitan Sewerage Service Corp
Nippon Koei Co Ltd
Nippon Hume Corp
Maithick Co
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Abstract

To provide a manhole joint water-cutoff method that can block the inflow of water from a joint between stacked concrete side blocks for an existing dividable manhole.SOLUTION: For a joint 3 between stacked concrete side blocks 2, 2, the inner side is circumferentially cut along the joint 3 and at a predetermined depth within a range that does not exceed the outer wall surface of the concrete side blocks 2, 2 in order to form a circumferential groove 4 that opens on the inner side of the joint 3 between the concrete side blocks 2, 2. Next, the circumferential groove 4 is blocked by inserting a water-cutoff material 5 formed using a water swelling material or water expansion material into the bottom of the circumferential groove 4, and then the circumferential groove 4 is sealed by filling it with a water-cutoff adhesive 6.SELECTED DRAWING: Figure 1

Description

本発明は、積層されたコンクリート側塊の接合部から流入する水を止める人孔接合部止水工法に関する。 The present invention relates to a manhole joint water stopping method for stopping water flowing in from a joint of laminated concrete side blocks.

既設の分割人孔にあって、設置された地盤が環境の変化により含水地盤となり、積層されたコンクリート側塊の接合部からの浸水の恐れが発生し、また、浸水が発生する場合がある。
従来、積層されたコンクリート側塊の接合部からの浸水を防ぐ手段として、積層されたコンクリート側塊の接合部を、コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して、コンクリート側塊の接合部に内周側に開口する高さ方向所定幅の周溝部を形成し、周溝部に弾性接着剤を充填してシールしたり（例えば、特許文献１参照。）、また、積層されたコンクリート側塊の接合部に止水モルタルを配置する（例えば、特許文献２参照。）といったことが知られている。 In the existing split manhole, the installed ground becomes water-containing ground due to changes in the environment, and there is a risk of inundation from the joints of the laminated concrete side blocks, and inundation may occur.
Conventionally, as a means of preventing water from entering from the joint portion of the laminated concrete side mass, the joint portion of the laminated concrete side mass is extended from the inner peripheral side of the laminated concrete side mass to a predetermined position within a range not exceeding the outer peripheral wall surface. By cutting in the circumferential direction along the joint at a depth, a peripheral groove having a predetermined width in the height direction is formed at the joint of the concrete side block to open to the inner peripheral side, and the peripheral groove is filled with an elastic adhesive. It is known that the concrete can be sealed (for example, see Patent Document 1), and a waterproof mortar is placed at the joint of the laminated concrete side blocks (for example, see Patent Document 2).

特開２０１４−５８８４４号公報Japanese Unexamined Patent Publication No. 2014-58844 特開２０１６−２１７１１８号公報Japanese Unexamined Patent Publication No. 2016-217118

しかしながら、特許文献１に記載された積層されたコンクリート側塊の接合部からの浸水を防ぐ手段は、既に接合部からの浸水が発生している場合には、コンクリート側塊の接合部に形成した周溝部に弾性接着剤を充填しようとしても、流入する水の水圧が周溝部に充填した弾性接着剤の全周囲に掛かり、弾性接着剤は強い水圧を受けて周溝部から押し出されてしまい止水できないといった問題がある。また、接合部から浸水が発生していなくても、コンクリート側塊の接合部に周溝部を形成する過程で、接合部を通じて周溝部に浸水が発生した場合には、前記と同様に、周溝部に弾性接着剤を充填しようとしても、流入する水の水圧により弾性接着剤が押し出されてしまい止水できないといった問題がある。 However, the means for preventing water ingress from the joint portion of the laminated concrete side mass described in Patent Document 1 is formed at the joint portion of the concrete side mass when water infiltration from the joint portion has already occurred. Even if an attempt is made to fill the peripheral groove with the elastic adhesive, the water pressure of the inflowing water is applied to the entire circumference of the elastic adhesive filled in the peripheral groove, and the elastic adhesive is pushed out from the peripheral groove due to strong water pressure to stop water. There is a problem that it cannot be done. Further, even if water inundation does not occur from the joint, if water infiltrates through the joint in the process of forming the peripheral groove in the joint of the concrete side mass, the peripheral groove is similarly described above. Even if an attempt is made to fill the elastic adhesive, there is a problem that the elastic adhesive is pushed out by the water pressure of the inflowing water and the water cannot be stopped.

また、特許文献２に記載された積層されたコンクリート側塊の接合部からの浸水を防ぐ手段は、既に接合部からの浸水が発生している場合には、積層されたコンクリート側塊の接合部に止水モルタルを配置することができず止水できないといった問題がある。 Further, the means for preventing water ingress from the joint portion of the laminated concrete side mass described in Patent Document 2 is the joint portion of the laminated concrete side mass when water infiltration from the joint portion has already occurred. There is a problem that the water-stopping mortar cannot be placed in the water and the water cannot be stopped.

本発明者等は、かかる問題を解決すべく試験を重ねた結果、コンクリート側塊の接合部から流入する水の一部を接合部の途中からバイパスさせて接合部を流れる水量を減少させ、水圧を低下させることに着眼し、本発明を完成するに至った。 As a result of repeated tests to solve this problem, the present inventors reduced the amount of water flowing through the joint by bypassing a part of the water flowing from the joint of the concrete side block from the middle of the joint, and reduced the water pressure. We have completed the present invention by focusing on reducing the amount of water.

本発明の目的は、既設の分割人孔の積層されたコンクリート側塊の接合部から流入する水を止めることができる人孔接合部防水工法を提供することにある。 An object of the present invention is to provide a manhole joint waterproofing method capable of stopping water flowing in from a joint of concrete side blocks in which existing divided manholes are laminated.

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から流入する水を止める人孔接合部防水工法であって、積層された前記コンクリート側塊の接合部を、前記コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して前記コンクリート側塊の接合部に内周側に開口する周溝部を形成し、つぎに、前記周溝部の溝奥に水膨潤材又は水膨張材からなる止水材を挿入して前記周溝部を堰止めし、つぎに、前記周溝部に止水接着剤を充填してシールすることを特徴とする。 In order to achieve the above object, the invention according to claim 1 is a human hole joint waterproofing method for stopping water flowing in from a joint of laminated concrete side lumps, wherein the laminated concrete side lumps are laminated. The joint portion of the concrete side block is cut in the circumferential direction along the joint portion at a depth from the inner peripheral side of the concrete side block to a predetermined position within a range not exceeding the outer peripheral wall surface, and inside the joint portion of the concrete side block. A peripheral groove portion that opens on the peripheral side is formed, and then a water swelling material or a water blocking material made of a water expanding material is inserted into the groove depth of the peripheral groove portion to block the peripheral groove portion, and then the peripheral groove portion is blocked. The groove is filled with a waterproof adhesive to seal the groove.

請求項１に記載の発明によれば、積層された前記コンクリート側塊の接合部を、前記コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して前記コンクリート側塊の接合部に内周側に開口する周溝部を形成し、つぎに、前記周溝部の溝奥に水膨潤材又は水膨張材からなる止水材を挿入して前記周溝部を堰止めし、前記止水材を挿入することにより、外部から前記コンクリート側塊の接合部を通じて前記周溝部に流入する水を前記止水材が吸いこみ膨潤又は膨張して前記周溝部の内周に圧接することにより、前記周溝部が堰止めされる。このようにして堰止めした前記周溝部に止水接着剤を充填することにより、前記周溝部を確実にシールすることができる。 According to the invention of claim 1, the joint portion of the laminated concrete side mass is formed at a depth from the inner peripheral side of the concrete side mass to a predetermined position within a range not exceeding the outer peripheral wall surface. A peripheral groove portion that opens to the inner peripheral side is formed at the joint portion of the concrete side mass by cutting in the circumferential direction along the above, and then, a water blocking material made of a water swelling material or a water expanding material is formed in the groove depth of the peripheral groove portion. By inserting a material to block the peripheral groove portion and inserting the waterproof material, the waterproof material sucks water flowing into the peripheral groove portion from the outside through the joint portion of the concrete side mass and swells or swells. The peripheral groove portion is dammed by expanding and pressing against the inner circumference of the peripheral groove portion. By filling the peripheral groove portion dammed in this way with a waterproof adhesive, the peripheral groove portion can be reliably sealed.

請求項２に記載の発明は、積層されたコンクリート側塊の接合部から流入する水を止める人孔接合部防水工法であって、積層された前記コンクリート側塊の接合部を、前記コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して前記コンクリート側塊の接合部に内周側に開口する周溝部を形成するとともに、前記コンクリート側塊の壁部に、前記周溝部の奥部に連通し内周壁面に開口するバイパス穴を形成し、つぎに、前記周溝部の溝奥で、前記バイパス穴の手前或いは跨がる位置に水膨潤材又は水膨張材からなる止水材を挿入して前記周溝部を堰止めし、つぎに、前記周溝部に止水接着剤を充填してシールし、つぎに、前記コンクリート側塊の壁部に形成した前記バイパス穴にシール材を注入してシールすることを特徴とする。 The invention according to claim 2 is a method for waterproofing a human hole joint portion that stops water flowing in from a joint portion of the laminated concrete side mass, and the joint portion of the laminated concrete side mass is formed into the concrete side mass. A peripheral groove portion that opens to the inner peripheral side is formed at the joint portion of the concrete side mass by cutting in the circumferential direction along the joint portion at a depth from the inner peripheral side of the concrete to a predetermined position within a range not exceeding the outer peripheral wall surface. At the same time, a bypass hole is formed in the wall portion of the concrete side mass so as to communicate with the inner portion of the peripheral groove portion and open to the inner peripheral wall surface, and then, in the groove depth of the peripheral groove portion, in front of the bypass hole or in front of the bypass hole. A water-stopping material made of a water-swelling material or a water-swelling material is inserted at a straddling position to block the peripheral groove portion, and then the peripheral groove portion is filled with a waterproofing adhesive to seal it. It is characterized in that a sealing material is injected into the bypass hole formed in the wall portion of the concrete side block to seal the concrete side block.

請求項２に記載の発明によれば、積層された前記コンクリート側塊の接合部を、前記コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して前記コンクリート側塊の接合部に内周側に開口する周溝部を形成するとともに、前記コンクリート側塊の壁部に、前記周溝部の奥部に連通し内周壁面に開口するバイパス穴を形成することにより、外部からコンクリート側塊の接合部を通じて前記周溝部へ流入する水が前記バイパス穴に流れ、前記周溝部を流れる水量が減少し、水圧が低くなり、水膨潤材又は水膨張材からなる止水材が挿入し易い状態となる。
この状態で、前記周溝部の溝奥で、前記バイパス穴の手前或いは跨がる位置に水膨潤材又は水膨張材からなる止水材を挿入することにより、前記止水材が流入する水を吸いこみ膨潤又は膨張して前記周溝部の内周に圧接する。
前記周溝部の溝奥に挿入した前記止水材が前記バイパス穴の手前である場合、コンクリート側塊の接合部を通じて前記周溝部へ流入する水は前記周溝部の奥部に連通する前記バイパス穴に流れるので、前記周溝部の内周に圧接した前記止水材に掛かる水圧を低く抑えることができ、前記周溝部に流入した水で前記止水材が押し出されることなく、前記周溝部が前記止水材により確実に堰止められる。
また、前記周溝部の溝奥に挿入した前記止水材が前記バイパス穴に跨がっている場合、前記周溝部へ流入した水の圧力が上昇し、水圧により前記周溝部の内周に圧接した前記止水材が前記周溝部の開口側へ押し出されたとしても、前記止水材が前記バイパス穴から離れた時点で前記バイパス穴が開放され、前記周溝部に流入した水は前記バイパス穴に流れ、前記周溝部の内周に圧接した前記止水材に掛かる水圧が低くなり、前記止水材がそれ以上押し出されることなく、前記周溝部が前記止水材により確実に堰止められる。
このようにして堰止めした前記周溝部に止水接着剤を充填することにより、前記周溝部を確実にシールすることができる。
そして、前記周溝部に止水接着剤を充填したら、前記コンクリート側塊の壁部に形成した前記バイパス穴にシール材を注入してシールするが、前記バイパス穴内を流れる水量は少ないので水圧が低く、前記バイパス穴に注入した前記シール材が押し出されることがなく、前記バイパス穴を前記シール材で確実にシールすることができる。 According to the invention of claim 2, the joint portion of the laminated concrete side mass is formed at a depth from the inner peripheral side of the concrete side mass to a predetermined position within a range not exceeding the outer peripheral wall surface. By cutting in the circumferential direction along the above, a peripheral groove portion that opens to the inner peripheral side is formed at the joint portion of the concrete side mass, and the inner circumference is communicated with the wall portion of the concrete side mass and the inner portion of the peripheral groove portion. By forming a bypass hole that opens on the wall surface, water that flows into the peripheral groove portion from the outside through the joint portion of the concrete side block flows into the bypass hole, the amount of water flowing through the peripheral groove portion is reduced, and the water pressure is lowered. A water-stopping material made of a water-swelling material or a water-swelling material is easily inserted.
In this state, by inserting a water-stopping material made of a water-swelling material or a water-swelling material in front of or straddling the bypass hole in the groove depth of the peripheral groove portion, the water into which the water-stopping material flows can be introduced. It sucks in and swells or expands and presses against the inner circumference of the peripheral groove portion.
When the water blocking material inserted into the groove of the peripheral groove portion is in front of the bypass hole, the water flowing into the peripheral groove portion through the joint portion of the concrete side block communicates with the inner portion of the peripheral groove portion. The water pressure applied to the water blocking material that is in pressure contact with the inner circumference of the peripheral groove portion can be suppressed to a low level, and the peripheral groove portion can be moved to the peripheral groove portion without being pushed out by the water flowing into the peripheral groove portion. It is securely dammed by a waterproof material.
Further, when the water blocking material inserted into the groove depth of the peripheral groove portion straddles the bypass hole, the pressure of the water flowing into the peripheral groove portion increases, and the water pressure causes pressure contact with the inner circumference of the peripheral groove portion. Even if the water blocking material is pushed out to the opening side of the peripheral groove portion, the bypass hole is opened when the water blocking material is separated from the bypass hole, and the water flowing into the peripheral groove portion is the bypass hole. The water pressure applied to the water blocking material that has been pressed against the inner circumference of the peripheral groove portion becomes low, and the peripheral groove portion is reliably dammed by the water blocking material without further pushing out the water blocking material.
By filling the peripheral groove portion dammed in this way with a waterproof adhesive, the peripheral groove portion can be reliably sealed.
Then, when the peripheral groove portion is filled with the waterproof adhesive, a sealing material is injected into the bypass hole formed in the wall portion of the concrete side block to seal the seal, but the water pressure is low because the amount of water flowing in the bypass hole is small. The sealing material injected into the bypass hole is not extruded, and the bypass hole can be reliably sealed with the sealing material.

請求項３に記載の発明は、請求項２に記載の、前記コンクリート側塊の壁部に形成する前記バイパス穴は、前記周溝部の周方向に任意の間隔を空けて複数形成することを特徴とする。 The invention according to claim 3 is characterized in that, according to claim 2, a plurality of the bypass holes formed in the wall portion of the concrete side block are formed at arbitrary intervals in the circumferential direction of the peripheral groove portion. And.

請求項３に記載の発明によれば、前記コンクリート側塊の壁部に形成する前記バイパス穴は、前記周溝部の周方向に任意の間隔を空けて複数形成するので、複数形成した前記バイパス穴により、バイパスさせる水量を確保することができるとともに、バイパスする水を分散化することにより個々の前記バイパス穴の小径化が図れ、前記バイパス穴を流れる水の水圧を前記バイパス穴に注入したシール材を押し出さない水圧に抑える径にすることができることから、外部からコンクリート側塊の接合部を通じて前記周溝部へ流入する水量が多い場合であっても、前記周溝部に挿入した前記止水材が押し出されない程度に前記周溝部へ流入する水量を減少させ、水圧を低くすることができるとともに、前記バイパス穴を前記シール材で確実にシールすることができる。 According to the invention of claim 3, since a plurality of the bypass holes formed in the wall portion of the concrete side block are formed at arbitrary intervals in the circumferential direction of the peripheral groove portion, the plurality of bypass holes formed are formed. As a result, the amount of water to be bypassed can be secured, and the diameter of each bypass hole can be reduced by dispersing the bypassed water, and the sealing material in which the water pressure of the water flowing through the bypass hole is injected into the bypass hole. Since the diameter can be set to suppress the water pressure so as not to push out, even if the amount of water flowing into the peripheral groove portion from the outside through the joint portion of the concrete side mass is large, the water blocking material inserted into the peripheral groove portion pushes. The amount of water flowing into the peripheral groove portion can be reduced to the extent that it is not discharged, the water pressure can be lowered, and the bypass hole can be reliably sealed with the sealing material.

請求項４に記載の発明は、積層されたコンクリート側塊の接合部から流入する水を止める人孔接合部防水工法であって、積層された前記コンクリート側塊の接合部を、前記コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して前記コンクリート側塊の接合部に内周側に開口する周溝部を形成するとともに、前記コンクリート側塊の壁部に、前記コンクリート側塊の外周壁面と前記周溝部の奥部との間に存在する積層された前記コンクリート側塊の接合部に連通し内周壁面に開口するバイパス穴を形成し、つぎに、前記周溝部の溝奥に水膨潤材又は水膨張材からなる止水材を挿入して前記周溝部を堰止めし、つぎに、前記周溝部に止水接着剤を充填してシールし、つぎに、前記コンクリート側塊の壁部に形成した前記バイパス穴にシール材を注入してシールすることを特徴とする。 The invention according to claim 4 is a method for waterproofing a human-hole joint portion that stops water flowing in from a joint portion of the laminated concrete side mass, and the joint portion of the laminated concrete side mass is formed into the concrete side mass. A peripheral groove portion that opens to the inner peripheral side is formed at the joint portion of the concrete side block by cutting in the circumferential direction along the joint portion at a depth from the inner peripheral side of the concrete to a predetermined position within a range not exceeding the outer peripheral wall surface. At the same time, the wall portion of the concrete side mass communicates with the joint portion of the laminated concrete side mass existing between the outer peripheral wall surface of the concrete side mass and the inner portion of the peripheral groove portion, and is opened in the inner peripheral wall surface. A bypass hole is formed, and then a water-stopping material made of a water-swelling material or a water-swelling material is inserted into the groove of the peripheral groove to dam the peripheral groove, and then water is stopped in the peripheral groove. It is characterized in that it is filled with an adhesive and sealed, and then a sealing material is injected into the bypass hole formed in the wall portion of the concrete side block to seal the concrete.

請求項４に記載の発明によれば、積層された前記コンクリート側塊の接合部を、前記コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して前記コンクリート側塊の接合部に内周側に開口する周溝部を形成するとともに、前記コンクリート側塊の壁部に、前記コンクリート側塊の外周壁面と前記周溝部の奥部との間に存在する積層された前記コンクリート側塊の前記接合部に連通し内周壁面に開口する前記バイパス穴を形成することにより、外部からコンクリート側塊の接合部へ入った水が前記バイパス穴に流れ、これにより、水膨潤材又は水膨張材からなる前記止水材を挿入し易い状態となる。
この状態で、前記周溝部の溝奥に前記止水材を挿入することにより、前記止水材が流入する水を吸いこみ膨潤又は膨張して前記周溝部の内周に圧接する。
そして、外部からコンクリート側塊の前記接合部へ入った水は、前記接合部に連通する前記バイパス穴に流れるので、前記周溝部の内周に圧接した前記止水材に掛かる水圧を低く抑えることができ、前記接合部を通って前記周溝部に流入した水で前記止水材が押し出されることなく、前記周溝部が前記止水材により確実に堰止められる。
このようにして堰止めした前記周溝部に止水接着剤を充填することにより、前記周溝部を確実にシールすることができる。
そして、前記周溝部に止水接着剤を充填したら、前記コンクリート側塊の壁部に形成した前記バイパス穴にシール材を注入してシールするが、前記バイパス穴内を流れる水量は少ないので水圧が低く、前記バイパス穴に注入した前記シール材が押し出されることがなく、前記バイパス穴を前記シール材で確実にシールすることができる。 According to the invention of claim 4, the joint portion of the laminated concrete side mass is formed at a depth from the inner peripheral side of the concrete side mass to a predetermined position within a range not exceeding the outer peripheral wall surface. A peripheral groove portion that opens to the inner peripheral side is formed at the joint portion of the concrete side block by cutting along the circumferential direction, and the outer peripheral wall surface of the concrete side block and the peripheral groove portion are formed on the wall portion of the concrete side block. Water that has entered the joint portion of the concrete side mass from the outside by forming the bypass hole that communicates with the joint portion of the laminated concrete side mass existing between the inner portion and the inner peripheral wall surface. Flows into the bypass hole, which makes it easy to insert the water-stopping material made of the water-swelling material or the water-swelling material.
In this state, by inserting the water blocking material into the groove depth of the peripheral groove portion, the water blocking material sucks in the inflowing water and swells or expands to press contact with the inner circumference of the peripheral groove portion.
Then, the water that has entered the joint portion of the concrete side block from the outside flows into the bypass hole that communicates with the joint portion, so that the water pressure applied to the water blocking material that is pressed against the inner circumference of the peripheral groove portion is suppressed to a low level. The peripheral groove portion is reliably dammed by the water blocking material without the water blocking material being pushed out by the water flowing into the peripheral groove portion through the joint portion.
By filling the peripheral groove portion dammed in this way with a waterproof adhesive, the peripheral groove portion can be reliably sealed.
Then, when the peripheral groove portion is filled with the waterproof adhesive, a sealing material is injected into the bypass hole formed in the wall portion of the concrete side block to seal the seal, but the water pressure is low because the amount of water flowing in the bypass hole is small. The sealing material injected into the bypass hole is not extruded, and the bypass hole can be reliably sealed with the sealing material.

請求項５に記載の発明は、請求項４に記載の、前記コンクリート側塊の壁部に形成する前記バイパス穴は、前記コンクリート側塊の外周壁面と前記周溝部の奥部との間に存在する積層された前記コンクリート側塊の接合部の周方向に任意の間隔を空けて複数形成することを特徴とする。 According to a fifth aspect of the present invention, the bypass hole formed in the wall portion of the concrete side block according to the fourth aspect exists between the outer peripheral wall surface of the concrete side block and the inner portion of the peripheral groove portion. It is characterized in that a plurality of laminated concrete side blocks are formed at arbitrary intervals in the circumferential direction.

請求項５に記載の発明によれば、前記コンクリート側塊の壁部に形成する前記バイパス穴は、前記コンクリート側塊の外周壁面と前記周溝部の奥部との間に存在する積層された前記コンクリート側塊の接合部の周方向に任意の間隔を空けて複数形成するので、複数形成した前記バイパス穴により、バイパスさせる水量を確保することができるとともに、バイパスする水を分散化することにより個々の前記バイパス穴の小径化が図れ、前記バイパス穴を流れる水の水圧を前記バイパス穴に注入したシール材を押し出さない水圧に抑える径にすることができることから、外部からコンクリート側塊の接合部へ入る水量が多い場合であっても、前記周溝部に挿入した前記止水材が押し出されない程度に前記周溝部へ流入する水量を減少させ、水圧を低くすることができるとともに、前記バイパス穴を前記シール材で確実にシールすることができる。 According to the invention of claim 5, the bypass hole formed in the wall portion of the concrete side block is a laminated structure existing between the outer peripheral wall surface of the concrete side block and the inner portion of the peripheral groove portion. Since a plurality of concrete side blocks are formed at arbitrary intervals in the circumferential direction of the joint portion, the amount of water to be bypassed can be secured by the plurality of formed bypass holes, and the bypassed water can be dispersed individually. Since the diameter of the bypass hole can be reduced and the water pressure of the water flowing through the bypass hole can be suppressed to a water pressure that does not push out the sealing material injected into the bypass hole, from the outside to the joint portion of the concrete side mass. Even when the amount of water entering the peripheral groove is large, the amount of water flowing into the peripheral groove portion can be reduced to the extent that the water blocking material inserted into the peripheral groove portion is not extruded, the water pressure can be lowered, and the bypass hole can be formed. It can be reliably sealed with the sealing material.

請求項６に記載の発明は、請求項１から５のいずれか１項に記載の、前記周溝部に充填する止水接着剤は、少なくとも前記コンクリート側塊の破壊より弱い力で剪断する弾性接着剤であることを特徴とする。 In the invention according to claim 6, the water-stopping adhesive to be filled in the peripheral groove portion according to any one of claims 1 to 5 is elastically bonded by shearing at least with a force weaker than the fracture of the concrete side mass. It is characterized by being an agent.

請求項６に記載の発明によれば、前記周溝部に充填する止水接着剤は、少なくとも前記コンクリート側塊の破壊より弱い力で剪断する弾性接着剤であるので、地震によってコンクリート側塊の接合部が水平方向にずれたとき、水平方向にかかる応力は、コンクリート側塊の接合部に沿って周方向に切削された周溝部に充填された接合部全周にある弾性接着剤層全体に均等にかかることになるから、前記応力に対する耐力の向上が図れ、また、コンクリート側塊の接合部の水平方向へのずれが周溝部に充填された弾性接着剤で形成された弾性接着剤層の伸び率を超えた場合、コンクリート側塊に先んじて弾性接着剤層が剪断し、コンクリート側塊の破壊を防止することができるので、地震にも対応することができる。 According to the invention of claim 6, since the waterproof adhesive filled in the peripheral groove portion is an elastic adhesive that shears at least with a force weaker than the destruction of the concrete side mass, the concrete side mass is joined by an earthquake. When the portion is displaced in the horizontal direction, the stress applied in the horizontal direction is evenly distributed over the entire elastic adhesive layer around the joint portion filled in the peripheral groove portion cut in the circumferential direction along the joint portion of the concrete side mass. Therefore, it is possible to improve the resistance to the stress, and the lateral displacement of the joint portion of the concrete side block is the elongation of the elastic adhesive layer formed by the elastic adhesive filled in the peripheral groove portion. When the rate is exceeded, the elastic adhesive layer is sheared prior to the concrete side mass, and the destruction of the concrete side mass can be prevented, so that it is possible to cope with an earthquake.

以上のように、本発明に係る人孔接合部止水工法によれば、既設の分割人孔の積層されたコンクリート側塊の接合部から流入する水を容易に且つ確実に止めることができる。 As described above, according to the manhole joint water blocking method according to the present invention, it is possible to easily and surely stop the water flowing in from the joint portion of the concrete side mass in which the existing divided manholes are laminated.

本発明に係る人孔接合部止水工法の実施の形態の第１例を実施した人孔を示す縦断面図である。It is a vertical cross-sectional view which shows the manhole which carried out the 1st example of the embodiment of the manhole joint water stop method which concerns on this invention. 本発明に係る人孔接合部止水工法の第１例を実施する工程で、積層されたコンクリート側塊の接合部に周溝部を形成した状態を示す要部縦断説明図である。FIG. 5 is a vertical sectional explanatory view of a main part showing a state in which a peripheral groove portion is formed at a joint portion of laminated concrete side blocks in a step of carrying out the first example of the manhole joint water blocking method according to the present invention. 本発明に係る人孔接合部止水工法の第１例を実施する工程で、周溝部の周溝部内に止水材を挿入して周溝部を堰止めした状態を示す要部縦断説明図である。In the step of carrying out the first example of the manhole joint water blocking method according to the present invention, a vertical sectional explanatory view of a main part showing a state in which a water blocking material is inserted into the peripheral groove portion of the peripheral groove portion to dam the peripheral groove portion. is there. 本発明に係る人孔接合部止水工法の第１例を実施する工程で、周溝部に止水接着剤を充填してシールした状態を示す要部縦断説明図である。FIG. 5 is a vertical sectional explanatory view of a main part showing a state in which a peripheral groove portion is filled with a waterproof adhesive and sealed in a step of carrying out the first example of the manhole joint water blocking method according to the present invention. 本発明に係る人孔接合部止水工法の実施の形態の第２例を実施した人孔を示す縦断面図である。It is a vertical cross-sectional view which shows the manhole which carried out the 2nd example of the embodiment of the manhole joint water stop method which concerns on this invention. 本発明に係る人孔接合部止水工法の第２例を実施する工程で、積層されたコンクリート側塊の接合部に周溝部を形成した状態を示す要部縦断説明図である。FIG. 5 is a vertical sectional explanatory view of a main part showing a state in which a peripheral groove portion is formed at a joint portion of laminated concrete side blocks in a step of carrying out a second example of the manhole joint water blocking method according to the present invention. 本発明に係る人孔接合部止水工法の第２例を実施する工程で、コンクリート側塊の壁部に、周溝部の奥部に連通し内周壁面に開口するバイパス穴を形成した状態を示す要部縦断説明図である。In the step of carrying out the second example of the manhole joint water blocking method according to the present invention, a state in which a bypass hole is formed in the wall portion of the concrete side mass so as to communicate with the inner portion of the peripheral groove portion and open to the inner peripheral wall surface. It is explanatory drawing of the main part which shows. 本発明に係る人孔接合部止水工法の第２例を実施する工程で、コンクリート側塊の壁部に形成したバイパス穴の他例を示す要部縦断説明図である。FIG. 5 is a vertical sectional explanatory view of a main part showing another example of a bypass hole formed in a wall portion of a concrete side block in a step of carrying out a second example of the manhole joint water blocking method according to the present invention. 本発明に係る人孔接合部止水工法の第２例を実施する工程で、コンクリート側塊の壁部に形成したバイパス穴の他例を示す要部縦断説明図である。FIG. 5 is a vertical sectional explanatory view of a main part showing another example of a bypass hole formed in a wall portion of a concrete side block in a step of carrying out a second example of the manhole joint water blocking method according to the present invention. 本発明に係る人孔接合部止水工法の第２例を実施する工程で、周溝部の周溝部内に止水材を挿入して周溝部を堰止めした状態を示す要部縦断説明図である。In the step of carrying out the second example of the manhole joint water blocking method according to the present invention, a vertical sectional explanatory view of a main part showing a state in which a water blocking material is inserted into the peripheral groove portion of the peripheral groove portion to dam the peripheral groove portion. is there. 本発明に係る人孔接合部止水工法の第２例を実施する工程で、周溝部に止水接着剤を充填してシールした状態を示す要部縦断説明図である。FIG. 5 is a vertical sectional explanatory view of a main part showing a state in which a peripheral groove portion is filled with a waterproof adhesive and sealed in a step of carrying out a second example of the manhole joint water blocking method according to the present invention. 本発明に係る人孔接合部止水工法の第２例を実施する工程で、コンクリート側塊の壁部に形成したバイパス穴にシール材を注入してシールした状態を示す要部縦断説明図である。In the step of carrying out the second example of the manhole joint water blocking method according to the present invention, a vertical sectional explanatory view of a main part showing a state in which a sealing material is injected into a bypass hole formed in a wall portion of a concrete side block to seal the manhole. is there. 本発明に係る人孔接合部止水工法の実施の形態の第３例を実施した人孔を示す縦断面図である。It is a vertical cross-sectional view which shows the manhole which carried out the 3rd example of the embodiment of the manhole joint water stop method which concerns on this invention. 本発明に係る人孔接合部止水工法の第３例を実施する工程で、積層されたコンクリート側塊の接合部に周溝部を形成した状態を示す要部縦断説明図である。FIG. 5 is a vertical sectional explanatory view of a main part showing a state in which a peripheral groove portion is formed at a joint portion of laminated concrete side blocks in a step of carrying out a third example of the manhole joint water blocking method according to the present invention. 本発明に係る人孔接合部止水工法の第３例を実施する工程で、コンクリート側塊の壁部に、積層されたコンクリート側塊の接合部に連通し内周壁面に開口するバイパス穴を形成した状態を示す要部縦断説明図である。In the step of carrying out the third example of the manhole joint water blocking method according to the present invention, a bypass hole is formed in the wall portion of the concrete side mass by communicating with the joint portion of the laminated concrete side mass and opening in the inner peripheral wall surface. It is a vertical sectional explanatory view of a main part which shows the formed state. 本発明に係る人孔接合部止水工法の第３例を実施する工程で、周溝部の周溝部内に止水材を挿入して周溝部を堰止めした状態を示す要部縦断説明図である。In the step of carrying out the third example of the manhole joint water blocking method according to the present invention, a vertical sectional explanatory view of a main part showing a state in which a water blocking material is inserted into the peripheral groove portion of the peripheral groove portion to dam the peripheral groove portion. is there. 本発明に係る人孔接合部止水工法の第３例を実施する工程で、周溝部に止水接着剤を充填してシールした状態を示す要部縦断説明図である。FIG. 5 is a vertical sectional explanatory view of a main part showing a state in which a peripheral groove portion is filled with a waterproof adhesive and sealed in a step of carrying out a third example of the manhole joint water blocking method according to the present invention. 本発明に係る人孔接合部止水工法の第３例を実施する工程で、コンクリート側塊の壁部に形成したバイパス穴にシール材を注入してシールした状態を示す要部縦断説明図である。In the step of carrying out the third example of the manhole joint water blocking method according to the present invention, a vertical sectional explanatory view of a main part showing a state in which a sealing material is injected into a bypass hole formed in a wall portion of a concrete side block to seal the manhole. is there.

以下、本発明に係る人孔接合部止水工法を実施するための形態の一例を詳細に説明する。
図１乃至図４は本発明に係る人孔接合部止水工法の実施の形態の第１例を示すものであり、図１は第１例の人孔接合部止水工法を実施した人孔を示す縦断面図、図２は第１例の人孔接合部止水工法を実施する工程で、積層されたコンクリート側塊の接合部に周溝部を形成した状態を示す要部縦断説明図、図３は第１例の人孔接合部止水工法を実施する工程で、周溝部の周溝部内に止水材を挿入して周溝部を堰止めした状態を示す要部縦断説明図、図４は第１例の人孔接合部止水工法を実施する工程で、周溝部に止水接着剤を充填してシールした状態を示す要部縦断説明図である。 Hereinafter, an example of a mode for carrying out the manhole joint water blocking method according to the present invention will be described in detail.
1 to 4 show a first example of the embodiment of the manhole joint water stoppage method according to the present invention, and FIG. 1 shows a manhole in which the manhole joint water stoppage method of the first example is carried out. FIG. 2 is a vertical sectional explanatory view showing a state in which a peripheral groove portion is formed at a joint portion of the laminated concrete side blocks in the step of carrying out the manhole joint water blocking method of the first example. FIG. 3 is a vertical sectional explanatory view and a view of a main part showing a state in which a water blocking material is inserted into the peripheral groove portion of the peripheral groove portion to dam the peripheral groove portion in the step of implementing the manhole joint water blocking method of the first example. FIG. 4 is a vertical sectional explanatory view of a main part showing a state in which the peripheral groove portion is filled with a water blocking adhesive and sealed in the step of carrying out the manhole joint water blocking method of the first example.

第１例の人孔接合部止水工法は、既設の人孔１における上下に積層されたコンクリート側塊２，２の接合部３から流入する水を止める人孔接合部止水工法である。 The manhole joint water stoppage method of the first example is a manhole joint water stoppage method for stopping water flowing in from the joint portion 3 of the concrete side blocks 2 and 2 laminated on the upper and lower sides of the existing manhole 1.

まず、積層されたコンクリート側塊２，２の接合部３を、コンクリート側塊２，２の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部３に沿って周方向に切削してコンクリート側塊２，２の接合部３に内周側に開口する周溝部４を形成する（図２参照。）。 First, the joint portion 3 of the laminated concrete side lumps 2 and 2 is placed along the joint portion 3 at a depth from the inner peripheral side of the concrete side lumps 2 and 2 to a predetermined position within a range not exceeding the outer peripheral wall surface. By cutting in the circumferential direction, a peripheral groove portion 4 that opens to the inner peripheral side is formed at the joint portion 3 of the concrete side lumps 2 and 2 (see FIG. 2).

つぎに、周溝部４の溝奥に水膨潤止水材又は水膨張止水材からなる止水材５を環状に挿入する。本例では、紐状の止水材５を周溝部４に沿って挿入し環状としている。
周溝部４内に挿入された環状の止水材５は、流入する水を吸いこみ膨潤又は膨張して周溝部４の内周に圧接し、そして、周溝部４の内周に圧接した止水材に掛かる水圧は低くなっているので、流入した水で押し出されることなく周溝部４を堰止める（図３参照。）。
なお、止水材５の形状は、周溝部４に沿って挿入することができれば特に限定されないが、本例のように紐状に形成すると周溝部４に沿った止水材５の挿入を容易にすることができるので好適である。また、予め周溝部４の溝奥の周長に合わせた長さに形成した紐状の止水材５の両端を接合して環状の止水材５としてもよい。環状の止水材５によれば、周溝部４の所定位置への止水材５の挿入を素早く且つ容易に行うことができる。 Next, the water-stopping material 5 made of a water-swelling water-stopping material or a water-swelling water-stopping material is inserted in an annular shape into the groove of the peripheral groove portion 4. In this example, the string-shaped water blocking material 5 is inserted along the peripheral groove portion 4 to form an annular shape.
The annular water blocking material 5 inserted into the peripheral groove portion 4 sucks in the inflowing water, swells or expands, and press-contacts the inner circumference of the peripheral groove portion 4, and then press-contacts the inner circumference of the peripheral groove portion 4. Since the water pressure applied to the material is low, the peripheral groove portion 4 is blocked without being pushed out by the inflowing water (see FIG. 3).
The shape of the water blocking material 5 is not particularly limited as long as it can be inserted along the peripheral groove portion 4, but if it is formed in a string shape as in this example, the water blocking material 5 can be easily inserted along the peripheral groove portion 4. It is suitable because it can be used. Further, both ends of the string-shaped water blocking material 5 formed in advance to match the peripheral length of the groove depth of the peripheral groove portion 4 may be joined to form an annular water blocking material 5. According to the annular water blocking material 5, the water blocking material 5 can be quickly and easily inserted into the predetermined position of the peripheral groove portion 4.

ここで使用される止水材５となる水膨潤止水材、水膨張止水材としては、吸水性ゴム、吸水性ポリマー、親水性ポリマーなどがあげられる。本例では吸水性ポリマーを使用している。 Examples of the water-swelling water-stopping material and the water-swelling water-stopping material used here as the water-stopping material 5 include water-absorbent rubber, water-absorbent polymer, and hydrophilic polymer. In this example, a water-absorbent polymer is used.

本例では、周溝部４内に水膨潤止水材又は水膨張止水材の一方を止水材５として挿入しているが、水膨潤止水材と水膨張止水材を併せて止水材５として周溝部４内に挿入してもよい（図示せず。）。この場合、挿入する水膨潤止水材と水膨張止水材の後先については特に限定されない。 In this example, one of the water-swelling water-stopping material and the water-expanding water-stopping material is inserted as the water-stopping material 5 in the peripheral groove portion 4, but the water-swelling water-stopping material and the water-expanding water-stopping material are combined to stop water. As the material 5, it may be inserted into the peripheral groove portion 4 (not shown). In this case, the tip of the water-swelling water-stopping material and the water-swelling water-stopping material to be inserted is not particularly limited.

つぎに、周溝部４に止水接着剤６を充填してシールする（図４参照。）。
止水接着剤６にあっては、樹脂系接着剤、セメント型接着剤などが使用される。樹脂系接着剤としては、エポキシ樹脂、ウレタン樹脂、シリコーンゴム系樹脂などがあげられる。セメント型接着剤としては、ポリマーセメントモルタルがあげられる。 Next, the peripheral groove portion 4 is filled with the waterproof adhesive 6 and sealed (see FIG. 4).
As the water-stopping adhesive 6, a resin-based adhesive, a cement-type adhesive, or the like is used. Examples of the resin-based adhesive include epoxy resin, urethane resin, and silicone rubber-based resin. Examples of the cement type adhesive include polymer cement mortar.

第１例では、止水接着剤６は、少なくともコンクリート側塊２，２の破壊より弱い力で剪断する弾性接着剤を使用している。弾性接着剤としては、弾性エポキシ樹脂、シリコンエラストマー、ゴムフィラー、ポリウエアを使用した熱硬化性樹脂等を使用することができ特に限定されないが、接着性、コンクリート側塊２，２の変位に対する追従性、更には耐薬品性、耐水性といった点から弾性エポキシ樹脂が好ましい。 In the first example, the waterproof adhesive 6 uses an elastic adhesive that shears at least with a force weaker than the fracture of the concrete side lumps 2 and 2. As the elastic adhesive, an elastic epoxy resin, a silicon elastomer, a rubber filler, a thermosetting resin using polyware, or the like can be used and is not particularly limited, but has adhesiveness and followability to displacement of concrete side lumps 2 and 2. Further, an elastic epoxy resin is preferable from the viewpoint of chemical resistance and water resistance.

以上のように構成される第１例の人孔接合部止水工法によれば、積層されたコンクリート側塊２，２の接合部を、コンクリート側塊２，２の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部３に沿って周方向に切削してコンクリート側塊２，２の接合部３に内周側に開口する周溝部４を形成し、周溝部４の溝奥に水膨潤止水材又は水膨張止水材からなる止水材５を環状に挿入することにより、止水材５が流入する水を吸いこみ膨潤又は膨張して周溝部４の内周に圧接し、周溝部４が堰止めされる。このようにして堰止めした周溝部４に止水接着剤６を充填することにより、周溝部４を確実にシールすることができ、積層されたコンクリート側塊２，２の接合部３から人孔１内への水の流入を確実に止めることができる According to the human hole joint water blocking method of the first example configured as described above, the joint portion of the laminated concrete side lumps 2 and 2 is formed on the outer peripheral wall surface from the inner peripheral side of the concrete side lumps 2 and 2. A peripheral groove portion 4 that opens to the inner peripheral side is formed at the joint portion 3 of the concrete side lumps 2 and 2 by cutting in the circumferential direction along the joint portion 3 at a depth up to a predetermined position within a range not exceeding the circumference. By inserting a water-swelling water-stopping material or a water-stopping material 5 made of a water-expanding water-stopping material into the groove of the groove 4 in a ring shape, the water-stopping material 5 sucks in the inflowing water and swells or expands to expand the peripheral groove portion 4. The peripheral groove portion 4 is dammed by pressure contacting the inner circumference of the concrete. By filling the peripheral groove portion 4 damped in this way with the waterproof adhesive 6, the peripheral groove portion 4 can be reliably sealed, and a manhole is formed from the joint portion 3 of the laminated concrete side lumps 2 and 2. The inflow of water into 1 can be reliably stopped.

第１例では、止水接着剤６は、少なくともコンクリート側塊２，２の破壊より弱い力で剪断する弾性接着剤が使用されているので、地震によってコンクリート側塊２，２の接合部３が水平方向にずれたとき、水平方向にかかる応力は、コンクリート側塊２，２の接合部３に沿って周方向に切削された周溝部４に充填された接合部３全周にある弾性接着剤層全体に均等にかかることになるから、応力に対する耐力の向上が図れ、また、コンクリート側塊２，２の接合部３の水平方向へのずれが周溝部４に充填された弾性接着剤で形成された弾性接着剤層の伸び率を超えた場合、コンクリート側塊２，２に先んじて弾性接着剤層が剪断し、コンクリート側塊２，２の破壊を防止することができるので、地震にも対応することができる。 In the first example, since the waterproof adhesive 6 is an elastic adhesive that shears at least with a force weaker than the destruction of the concrete side lumps 2 and 2, the joint portion 3 of the concrete side lumps 2 and 2 is formed by the earthquake. When displaced in the horizontal direction, the stress applied in the horizontal direction is the elastic adhesive on the entire circumference of the joint portion 3 filled in the peripheral groove portion 4 cut in the circumferential direction along the joint portion 3 of the concrete side blocks 2 and 2. Since it is applied evenly to the entire layer, the resistance to stress can be improved, and the lateral displacement of the joint portion 3 of the concrete side lumps 2 and 2 is formed by the elastic adhesive filled in the peripheral groove portion 4. When the elongation rate of the elastic adhesive layer is exceeded, the elastic adhesive layer is sheared prior to the concrete side lumps 2 and 2, and the destruction of the concrete side lumps 2 and 2 can be prevented, so that even in an earthquake. Can be accommodated.

図５乃至図１２は本発明に係る人孔接合部止水工法の実施の形態の第２例を示すものであり、図５は第２例の人孔接合部止水工法を実施した人孔を示す縦断面図、図６は第２例の人孔接合部止水工法を実施する工程で、積層されたコンクリート側塊の接合部に周溝部を形成した状態を示す要部縦断説明図、図７は第２例の人孔接合部止水工法を実施する工程で、コンクリート側塊の壁部に、周溝部の奥部に連通し内周壁面に開口するバイパス穴を形成した状態を示す要部縦断説明図、図８は第２例の人孔接合部止水工法を実施する工程で、コンクリート側塊の壁部に形成したバイパス穴の他例を示す要部縦断説明図、図９は第２例の人孔接合部止水工法を実施する工程で、コンクリート側塊の壁部に形成したバイパス穴の他例を示す要部縦断説明図、図１０は第２例の人孔接合部止水工法を実施する工程で、周溝部の周溝部内に止水材を挿入して周溝部を堰止めした状態を示す要部縦断説明図、図１１は第２例の人孔接合部止水工法を実施する工程で、周溝部に止水接着剤を充填してシールした状態を示す要部縦断説明図、図１２は第２例の人孔接合部止水工法の第２例を実施する工程で、コンクリート側塊の壁部に形成したバイパス穴にシール材を注入してシールした状態を示す要部縦断説明図である。 5 to 12 show a second example of the embodiment of the manhole joint water stopping method according to the present invention, and FIG. 5 shows a manhole in which the manhole joint water stopping method of the second example is carried out. FIG. 6 is a vertical sectional explanatory view of a main part showing a state in which a peripheral groove portion is formed at a joint portion of a laminated concrete side mass in the step of carrying out the manhole joint water blocking method of the second example. FIG. 7 shows a state in which a bypass hole that communicates with the inner part of the peripheral groove portion and opens to the inner peripheral wall surface is formed in the wall portion of the concrete side mass in the step of carrying out the manhole joint water blocking method of the second example. FIG. 8 is an explanatory view of the vertical section of the main part, FIG. 9 is an explanatory view of the vertical section of the main part showing another example of the bypass hole formed in the wall portion of the manhole side block in the step of implementing the manhole joint water blocking method of the second example. Is a vertical section explanatory view of a main part showing another example of a bypass hole formed in the wall portion of the concrete side block in the step of implementing the manhole joint water blocking method of the second example, and FIG. 10 is a manhole joint of the second example. In the process of carrying out the partial water blocking method, a vertical sectional explanatory view of a main part showing a state in which a water blocking material is inserted into the peripheral groove portion of the peripheral groove portion to dam the peripheral groove portion, FIG. 11 shows a manhole joint portion of the second example. A longitudinal explanatory view of a main part showing a state in which a peripheral groove portion is filled with a waterproofing adhesive and sealed in a step of carrying out the water blocking method, FIG. 12 shows a second example of the manhole joint water stopping method of the second example. FIG. 5 is a vertical sectional explanatory view of a main part showing a state in which a sealing material is injected into a bypass hole formed in a wall portion of a concrete side block to seal the manhole.

第２例の人孔接合部止水工法は、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て説明する。
第２例は、第１例と同様に、既設の人孔１における上下に積層されたコンクリート側塊２，２の接合部３から流入する水を止める人孔接合部止水工法である。 The manhole joint water blocking method of the second example is the same as that of the first example in the basic configuration, and the same configuration as that of the first example will be described with the same reference numerals.
The second example is a manhole joint water-stopping method for stopping water flowing in from the joint 3 of the concrete side lumps 2 and 2 stacked vertically in the existing manhole 1 as in the first example.

第２例では、第１例と同様に、まず、積層されたコンクリート側塊２，２の接合部３を、コンクリート側塊２，２の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部３に沿って周方向に切削してコンクリート側塊２，２の接合部３に内周側に開口する周溝部４を形成する（図６参照。）。 In the second example, as in the first example, first, the joint portion 3 of the laminated concrete side lumps 2 and 2 is placed at a predetermined position within a range not exceeding the outer peripheral wall surface from the inner peripheral side of the concrete side lumps 2 and 2. By cutting in the circumferential direction along the joint portion 3 to form a peripheral groove portion 4 that opens to the inner peripheral side at the joint portion 3 of the concrete side blocks 2 and 2 (see FIG. 6).

つぎに、コンクリート側塊２，２の壁部に、周溝部４の奥部に連通し内周壁面に開口するバイパス穴７を形成する。バイパス穴７は、周溝部４へ挿入した後述する水膨潤止水材又は水膨張止水材からなる止水材５周溝部４へ流入する水の水圧により押し出されないように、外部からコンクリート側塊２，２の接合部３を通じて周溝部４へ流入する水の一部をバイパスさせるものである。 Next, a bypass hole 7 is formed in the wall portions of the concrete side blocks 2 and 2 so as to communicate with the inner portion of the peripheral groove portion 4 and open to the inner peripheral wall surface. The bypass hole 7 is formed from a water-swelling water-stopping material or a water-swelling water-stopping material, which will be described later, inserted into the peripheral groove portion 4. The bypass hole 7 is formed on the concrete side from the outside so as not to be pushed out by the water pressure of the water flowing into the peripheral groove portion 4. A part of the water flowing into the peripheral groove portion 4 through the joint portion 3 of the lumps 2 and 2 is bypassed.

第２例では、周溝部４を形成してからバイパス穴７を形成しているが、バイパス穴７を形成してから周溝部４を形成してもよい。 In the second example, the peripheral groove portion 4 is formed and then the bypass hole 7 is formed. However, the peripheral groove portion 4 may be formed after the bypass hole 7 is formed.

バイパス穴７は、バイパス穴７を流れる流量がバイパス穴７に挿入した後述するシール材を押し出さない水圧となる流量に制限する径であることを要する。従って、バイパス穴７へバイパスさせる水量が多い場合は、バイパス穴７を周溝部４の周方向に任意の間隔を空けて複数形成することが好ましい。
本例では、バイパス穴７を周溝部４の周方向に任意の間隔を空けて複数形成している（図７参照。）。バイパス穴７の間隔や個数は、バイパス穴７へバイパスさせる水量やバイパス穴７へ挿入するシール材の材質などにより適宜設定する。 The bypass hole 7 is required to have a diameter that limits the flow rate flowing through the bypass hole 7 to a water pressure that does not push out the sealing material inserted into the bypass hole 7, which will be described later. Therefore, when the amount of water to be bypassed to the bypass hole 7 is large, it is preferable to form a plurality of bypass holes 7 at arbitrary intervals in the circumferential direction of the peripheral groove portion 4.
In this example, a plurality of bypass holes 7 are formed at arbitrary intervals in the circumferential direction of the peripheral groove portion 4 (see FIG. 7). The interval and the number of the bypass holes 7 are appropriately set depending on the amount of water to be bypassed to the bypass holes 7 and the material of the sealing material to be inserted into the bypass holes 7.

また、本例では、バイパス穴７は接合部３を挟んで下側のコンクリート側塊２に形成しているが、これに限られるものではなく、図８に示すように、上側のコンクリート側塊２に形成してもよく、また、図９に示すように、下側と上側の両方のコンクリート側塊２，２に形成してもよい。 Further, in this example, the bypass hole 7 is formed in the lower concrete side block 2 with the joint portion 3 interposed therebetween, but the present invention is not limited to this, and as shown in FIG. 8, the upper concrete side block 7 is formed. It may be formed in 2 or, as shown in FIG. 9, it may be formed in both the lower and upper concrete side blocks 2 and 2.

つぎに、周溝部４の溝奥で、周溝部４内に開口するバイパス穴７の手前或いは跨がる位置に水膨潤材又は水膨張材からなる止水材５を環状に挿入する。本例では、バイパス穴７に跨がる位置に止水材５を挿入する。また、周溝部４に挿入する環状の止水材５は、第１例と同様に、紐状の止水材５を周溝部４に沿って挿入し環状としている。
周溝部４内に挿入された止水材５は、流入する水を吸いこみ膨潤又は膨張して周溝部４内周に圧接し、その結果、周溝部４へ流入した水の水圧が上昇し、水圧により周溝部４の内周に圧接した止水材５に高い水圧が掛かることになるが、この水圧により止水材５が周溝部４の開口側へ押し出されたとしても、止水材５がバイパス穴７から離れた時点でバイパス穴７が開放され、周溝部４に流入した水はバイパス穴７に流れ、周溝部４の内周に圧接している止水材５に掛かる水圧が低くなり、止水材５がそれ以上押し出されることなく周溝部４を堰止める（図１０参照。）。 Next, the water blocking material 5 made of a water swelling material or a water expanding material is inserted in an annular shape in the groove depth of the peripheral groove portion 4 in front of or at a position straddling the bypass hole 7 opening in the peripheral groove portion 4. In this example, the water blocking material 5 is inserted at a position straddling the bypass hole 7. Further, as the annular water blocking material 5 to be inserted into the peripheral groove portion 4, the string-shaped water blocking material 5 is inserted along the peripheral groove portion 4 to form an annular shape, as in the first example.
The water blocking material 5 inserted into the peripheral groove portion 4 sucks in the inflowing water, swells or expands, and presses against the inner circumference of the peripheral groove portion 4, and as a result, the water pressure of the water flowing into the peripheral groove portion 4 rises. A high water pressure is applied to the water blocking material 5 that is in pressure contact with the inner circumference of the peripheral groove portion 4 due to the water pressure. Even if the water blocking material 5 is pushed out to the opening side of the peripheral groove portion 4 by this water pressure, the water blocking material 5 When the water is separated from the bypass hole 7, the bypass hole 7 is opened, the water flowing into the peripheral groove portion 4 flows into the bypass hole 7, and the water pressure applied to the water blocking material 5 which is in pressure contact with the inner circumference of the peripheral groove portion 4 is low. Therefore, the water blocking material 5 is blocked from the peripheral groove portion 4 without being pushed out any more (see FIG. 10).

また、図示しないが、バイパス穴７の手前の位置に止水材５を挿入した場合、周溝部４内に挿入された止水材５は、流入する水を吸いこみ膨潤又は膨張して周溝部４内周に圧接し、そして、外部からコンクリート側塊２，２，の接合部３を通じて周溝部４へ流入する水がバイパス穴７に流れ、周溝部３を流れる水量が減少し、周溝部４の内周に圧接した止水材５に掛かる水圧は低くなっているので、流入した水で押し出されることなく周溝部４を堰止めることになる。 Further, although not shown, when the water blocking material 5 is inserted at a position in front of the bypass hole 7, the water blocking material 5 inserted into the peripheral groove portion 4 sucks in the inflowing water and swells or expands to the peripheral groove portion. Water that is pressure-welded to the inner circumference of 4 and flows from the outside through the joints 3 of the concrete side blocks 2 and 2 into the peripheral groove portion 4 flows into the bypass hole 7, the amount of water flowing through the peripheral groove portion 3 decreases, and the peripheral groove portion 4 Since the water pressure applied to the water blocking material 5 that is in pressure contact with the inner circumference of the water stopper 5 is low, the peripheral groove portion 4 is blocked without being pushed out by the inflowing water.

ここで使用される止水材５となる水膨潤止水材、水膨張止水材としては、第１例と同様、吸水性ゴム、吸水性ポリマー、親水性ポリマーなどがあげられる。第２例では吸水性ポリマーを使用している。 Examples of the water-swelling water-stopping material and the water-swelling water-stopping material used here as the water-stopping material 5 include a water-absorbent rubber, a water-absorbent polymer, and a hydrophilic polymer, as in the first example. In the second example, a water-absorbent polymer is used.

また、本例では、周溝部４内に水膨潤止水材又は水膨張止水材の一方を止水材５として挿入しているが、第１例と同様に、水膨潤止水材と水膨張止水材を併せて止水材５として周溝部４内に挿入してもよい（図示せず。）。この場合、挿入する水膨潤止水材と水膨張止水材の後先については特に限定されない。 Further, in this example, one of the water-swelling water-stopping material and the water-swelling water-stopping material is inserted as the water-stopping material 5 in the peripheral groove portion 4, but as in the first example, the water-swelling water-stopping material and water An expansion water blocking material may be combined as a water blocking material 5 and inserted into the peripheral groove portion 4 (not shown). In this case, the tip of the water-swelling water-stopping material and the water-swelling water-stopping material to be inserted is not particularly limited.

つぎに、周溝部４に止水接着剤６を充填してシールする（図１１参照。）。
止水接着剤６にあっては、樹脂系接着剤、セメント型接着剤などが使用される。樹脂系接着剤としては、エポキシ樹脂、ウレタン樹脂、シリコーンゴム系樹脂などがあげられる。セメント型接着剤としては、ポリマーセメントモルタルがあげられる。 Next, the peripheral groove portion 4 is filled with the waterproof adhesive 6 and sealed (see FIG. 11).
As the water-stopping adhesive 6, a resin-based adhesive, a cement-type adhesive, or the like is used. Examples of the resin-based adhesive include epoxy resin, urethane resin, and silicone rubber-based resin. Examples of the cement type adhesive include polymer cement mortar.

第２例では、止水接着剤６は第１例と同様に、少なくともコンクリート側塊２，２の破壊より弱い力で剪断する弾性接着剤を使用している。弾性接着剤としては、弾性エポキシ樹脂、シリコンエラストマー、ゴムフィラー、ポリウエアを使用した熱硬化性樹脂等が使用されるが特に限定されないが、接着性、コンクリート側塊２，２の変位に対する追従性、更には耐薬品性、耐水性といった点から弾性エポキシ樹脂が好ましい。 In the second example, as in the first example, the waterproof adhesive 6 uses an elastic adhesive that shears at least with a force weaker than the fracture of the concrete side lumps 2 and 2. As the elastic adhesive, an elastic epoxy resin, a silicon elastomer, a rubber filler, a thermosetting resin using polyware, or the like is used, but the adhesiveness and the followability to the displacement of the concrete side lumps 2 and 2 are not particularly limited. Further, an elastic epoxy resin is preferable from the viewpoint of chemical resistance and water resistance.

つぎに、コンクリート側塊２，２の壁部に形成したバイパス穴７にシール材８を注入してシールする（図１２参照。）。
第２例では、ゴム等の弾性体からなる栓９をバイパス穴７の奥に圧入して止水してからシール材８を注入してシールしている。
シール材８として、エポキシ樹脂、ポリマーセメントモルタルがあげられる。本例ではポリマーセメントモルタルを使用している。 Next, the sealing material 8 is injected into the bypass holes 7 formed in the walls of the concrete side blocks 2 and 2 to seal them (see FIG. 12).
In the second example, a stopper 9 made of an elastic body such as rubber is press-fitted into the depth of the bypass hole 7 to stop water, and then a sealing material 8 is injected to seal the seal.
Examples of the sealing material 8 include epoxy resin and polymer cement mortar. In this example, polymer cement mortar is used.

以上のように構成される第２例の人孔接合部止水工法によれば、積層されたコンクリート側塊２，２の接合部を、コンクリート側塊２，２の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部３に沿って周方向に切削してコンクリート側塊２，２の接合部３に内周側に開口する周溝部４を形成するとともに、コンクリート側塊２，２の壁部に、周溝部４の奥部に連通し内周壁面に開口するバイパス穴７を形成することにより、外部からコンクリート側塊２，２の接合部３を通じて周溝部４へ流入する水がバイパス穴７に流れ、周溝部４を流れる水量が減少し、水圧が低くなり止水材５が挿入し易い状態となる。 According to the human hole joint water blocking method of the second example configured as described above, the joint portion of the laminated concrete side lumps 2 and 2 is formed on the outer peripheral wall surface from the inner peripheral side of the concrete side lumps 2 and 2. At a depth to a predetermined position within a range that does not exceed, cutting is performed in the circumferential direction along the joint portion 3 to form a peripheral groove portion 4 that opens to the inner peripheral side at the joint portion 3 of the concrete side lumps 2 and 2. By forming a bypass hole 7 that communicates with the inner part of the peripheral groove portion 4 and opens to the inner peripheral wall surface in the wall portion of the concrete side lumps 2 and 2, the peripheral groove portion is formed from the outside through the joint portion 3 of the concrete side lumps 2 and 2. The water flowing into the 4 flows into the bypass hole 7, the amount of water flowing through the peripheral groove portion 4 decreases, the water pressure becomes low, and the water blocking material 5 becomes easy to insert.

この状態で、周溝部４の溝奥で、周溝部４内に開口するバイパス穴７の手前或いは跨がる位置に水膨潤材又は水膨張材からなる止水材５を環状に挿入することにより、止水材５が流入する水を吸いこみ膨潤又は膨張して周溝部４の内周に圧接する。
本例では、バイパス穴７に跨がる位置に止水材５を挿入したので、周溝部４内に挿入された止水材５は、流入する水を吸いこみ膨潤又は膨張して周溝部４内周に圧接し、その結果、周溝部４へ流入した水の水圧が上昇し、水圧により周溝部４の内周に圧接した止水材５に高い水圧が掛かることになるが、この水圧により止水材５が周溝部４の開口側へ押し出されたとしても、止水材５がバイパス穴７から離れた時点でバイパス穴７が開放され、周溝部４に流入した水はバイパス穴７に流れ、周溝部４の内周に圧接している止水材５に掛かる水圧が低くなり、止水材５がそれ以上押し出されることなく周溝部４が止水材５により確実に堰止められる。 In this state, by inserting a water-stopping material 5 made of a water-swelling material or a water-swelling material in an annular shape in the groove depth of the peripheral groove portion 4 in front of or straddling the bypass hole 7 that opens in the peripheral groove portion 4. , The water blocking material 5 sucks in the inflowing water, swells or expands, and presses against the inner circumference of the peripheral groove portion 4.
In this example, since the water blocking material 5 is inserted at a position straddling the bypass hole 7, the water blocking material 5 inserted in the peripheral groove portion 4 sucks in the inflowing water and swells or expands to the peripheral groove portion 4. As a result, the water pressure of the water flowing into the peripheral groove portion 4 rises due to pressure contact with the inner circumference, and a high water pressure is applied to the water blocking material 5 which is pressed against the inner circumference of the peripheral groove portion 4 due to the water pressure. Even if the water blocking material 5 is pushed out to the opening side of the peripheral groove portion 4, the bypass hole 7 is opened when the water blocking material 5 is separated from the bypass hole 7, and the water flowing into the peripheral groove portion 4 enters the bypass hole 7. The water pressure applied to the water blocking material 5 which flows and is in pressure contact with the inner circumference of the peripheral groove portion 4 becomes low, and the peripheral groove portion 4 is reliably dammed by the water blocking material 5 without further pushing out the water blocking material 5.

また、バイパス穴７の手前の位置に止水材５を挿入した場合は、コンクリート側塊２，２の接合部３を通じて周溝部４へ流入する水は周溝部４の奥部に連通するバイパス穴７に流れるので、周溝部４の内周に圧接した止水材５に掛かる水圧を低く抑えることができ、周溝部４に流入した水で止水材５が押し出されることなく、周溝部４が止水材５により確実に堰止められる。 Further, when the water blocking material 5 is inserted at a position in front of the bypass hole 7, the water flowing into the peripheral groove portion 4 through the joint portion 3 of the concrete side lumps 2 and 2 communicates with the inner portion of the peripheral groove portion 4. Since the water flows to the peripheral groove portion 4, the water pressure applied to the water blocking material 5 that is in pressure contact with the inner circumference of the peripheral groove portion 4 can be suppressed to a low level, and the peripheral groove portion 4 does not push out the water blocking material 5 by the water flowing into the peripheral groove portion 4. It is reliably dammed by the water blocking material 5.

また、本例では、バイパス穴７は接合部３を挟んで下側のコンクリート側塊２に形成しているが、図８に示すように、バイパス穴７が上側のコンクリート側塊２に形成されていても、外部からコンクリート側塊２，２，の接合部３を通じて周溝部４へ流入する水がバイパス穴７に流れ、周溝部３を流れる水量が減少し、周溝部４の内周に圧接した止水材５に掛かる水圧を低くすることができる。
また、図９に示すように、バイパス穴７が下側と上側の両方のコンクリート側塊２，２の両方に形成した場合には、外部からコンクリート側塊２，２，の接合部３を通じて周溝部４へ流入する水が上下のバイパス穴７に流れるので、多くの量の水をバイパスさせることができ、周溝部４へ流入する水の量が多くても周溝部３を流れる水量が減少し、周溝部４の内周に圧接した止水材５に掛かる水圧を低くすることができる。また、流入する水の量が少ない場合には、上側のバイパス穴７が通気穴となって下側のバイパス穴７内の水の流れをスムーズにすることができる。 Further, in this example, the bypass hole 7 is formed in the lower concrete side block 2 with the joint portion 3 interposed therebetween, but as shown in FIG. 8, the bypass hole 7 is formed in the upper concrete side block 2. Even so, the water flowing into the peripheral groove portion 4 from the outside through the joint portion 3 of the concrete side lumps 2 and 2 flows into the bypass hole 7, the amount of water flowing through the peripheral groove portion 3 decreases, and pressure welding is performed on the inner circumference of the peripheral groove portion 4. The water pressure applied to the water blocking material 5 can be reduced.
Further, as shown in FIG. 9, when the bypass hole 7 is formed in both the lower and upper concrete side lumps 2 and 2, the circumference is formed from the outside through the joint portion 3 of the concrete side lumps 2 and 2. Since the water flowing into the groove 4 flows into the upper and lower bypass holes 7, a large amount of water can be bypassed, and even if the amount of water flowing into the peripheral groove 4 is large, the amount of water flowing through the peripheral groove 3 decreases. The water pressure applied to the water blocking material 5 that is in pressure contact with the inner circumference of the peripheral groove portion 4 can be reduced. Further, when the amount of inflowing water is small, the upper bypass hole 7 becomes a ventilation hole, and the flow of water in the lower bypass hole 7 can be smoothed.

このようにして堰止めした周溝部４に止水接着剤６を充填することにより、周溝部４を確実にシールすることができる。
第２例では第１例と同様に、止水接着剤６は、少なくともコンクリート側塊の破壊より弱い力で剪断する弾性接着剤が使用されているので、地震によってコンクリート側塊の接合部が水平方向にずれたとき、水平方向にかかる応力は、コンクリート側塊の接合部に沿って周方向に切削された周溝部に充填された接合部全周にある弾性接着剤層全体に均等にかかることになるから、応力に対する耐力の向上が図れ、また、コンクリート側塊の接合部の水平方向へのずれが周溝部に充填された弾性接着剤で形成された弾性接着剤層の伸び率を超えた場合、コンクリート側塊に先んじて弾性接着剤層が剪断し、コンクリート側塊の破壊を防止することができるので、地震にも対応することができる。 By filling the peripheral groove portion 4 damped in this way with the waterproof adhesive 6, the peripheral groove portion 4 can be reliably sealed.
In the second example, as in the first example, the waterproof adhesive 6 uses an elastic adhesive that shears at least with a force weaker than the destruction of the concrete side mass, so that the joint portion of the concrete side mass is horizontal due to the earthquake. When deviated in the direction, the stress applied in the horizontal direction is evenly applied to the entire elastic adhesive layer on the entire circumference of the peripheral groove portion cut in the circumferential direction along the joint portion of the concrete side mass. Therefore, the resistance to stress can be improved, and the lateral displacement of the joint portion of the concrete side block exceeds the elongation rate of the elastic adhesive layer formed of the elastic adhesive filled in the peripheral groove portion. In this case, the elastic adhesive layer is sheared prior to the concrete side block to prevent the concrete side block from being destroyed, so that it is possible to cope with an earthquake.

そして、周溝部４に止水接着剤６を充填したら、コンクリート側塊２，２の壁部に形成したバイパス穴７にシール材８を注入してシールするが、バイパス穴７内を流れる水量は少ないので水圧が低く、バイパス穴７に注入したシール材８が押し出されることがなく、バイパス穴７をシール材８で確実にシールすることができる。特に、図８に示すように、バイパス穴７が上側のコンクリート側塊２に形成されていると、バイパス穴７へのシール材８の注入を容易に行うことができる。 Then, when the peripheral groove portion 4 is filled with the waterproof adhesive 6, the sealing material 8 is injected into the bypass hole 7 formed in the wall portion of the concrete side lumps 2 and 2 to seal the seal, but the amount of water flowing in the bypass hole 7 is Since the amount is small, the water pressure is low, the sealing material 8 injected into the bypass hole 7 is not extruded, and the bypass hole 7 can be reliably sealed with the sealing material 8. In particular, as shown in FIG. 8, when the bypass hole 7 is formed in the concrete side block 2 on the upper side, the sealing material 8 can be easily injected into the bypass hole 7.

第２例では、バイパス穴７を周溝部４の周方向に間隔を空けて複数形成しているので、複数形成したバイパス穴７により、バイパスさせる水量を確保することができるとともに、バイパスする水を分散化することにより個々のバイパス穴７の小径化が図れ、バイパス穴７を流れる水の水圧をバイパス穴７に注入したシール材８を押し出さない水圧に抑える径にすることができる。 In the second example, since a plurality of bypass holes 7 are formed at intervals in the circumferential direction of the peripheral groove portion 4, the amount of water to be bypassed can be secured by the plurality of bypass holes 7 formed, and the bypassed water can be provided. By decentralizing, the diameter of each bypass hole 7 can be reduced, and the water pressure of the water flowing through the bypass hole 7 can be reduced to a water pressure that does not push out the sealing material 8 injected into the bypass hole 7.

これにより、外部からコンクリート側塊２，２の接合部３を通じて周溝部４へ流入する水量が多い場合であっても、周溝部４に挿入した止水材５が押し出されない程度に周溝部４へ流入する水量を減少させ、水圧を低くすることができるとともに、バイパス穴７をシール材８で確実にシールすることができる。
また、第２例では、ゴム等の弾性体からなる栓９をバイパス穴７の奥に圧入して止水してからシール材８を注入してシールしているので、バイパス穴７の水の流れが無い状態でシール材８を注入することができ、シール材８の注入作業を容易に行うことができる。 As a result, even when the amount of water flowing into the peripheral groove portion 4 from the outside through the joint portion 3 of the concrete side lumps 2 and 2 is large, the peripheral groove portion 4 is not extruded to the extent that the water blocking material 5 inserted in the peripheral groove portion 4 is not pushed out. The amount of water flowing into the water can be reduced, the water pressure can be lowered, and the bypass hole 7 can be reliably sealed with the sealing material 8.
Further, in the second example, since the stopper 9 made of an elastic body such as rubber is press-fitted into the depth of the bypass hole 7 to stop the water, and then the sealing material 8 is injected to seal the water, the water in the bypass hole 7 is sealed. The sealing material 8 can be injected in a state where there is no flow, and the sealing material 8 can be easily injected.

図１３乃至図１８は本発明に係る人孔接合部止水工法の実施の形態の第３例を示すものであり、図１３は第３例の人孔接合部止水工法を実施した人孔を示す縦断面図、図１４は第３例の人孔接合部止水工法を実施する工程で、積層されたコンクリート側塊の接合部に周溝部を形成した状態を示す要部縦断説明図、図１５は第３例の人孔接合部止水工法を実施する工程で、コンクリート側塊の壁部に、周溝部の奥部に連通し内周壁面に開口するバイパス穴を形成した状態を示す要部縦断説明図、図１６は第３例の人孔接合部止水工法を実施する工程で、周溝部の周溝部内に止水材を挿入して周溝部を堰止めした状態を示す要部縦断説明図、図１７は第３例の人孔接合部止水工法を実施する工程で、周溝部に止水接着剤を充填してシールした状態を示す要部縦断説明図、図１８は第３例の人孔接合部止水工法の第２例を実施する工程で、コンクリート側塊の壁部に形成したバイパス穴にシール材を注入してシールした状態を示す要部縦断説明図である。 13 to 18 show a third example of the embodiment of the manhole joint water stopping method according to the present invention, and FIG. 13 shows a manhole in which the manhole joint water stopping method of the third example is carried out. FIG. 14 is a vertical sectional explanatory view of a main part showing a state in which a peripheral groove portion is formed at a joint portion of a laminated concrete side block in the step of carrying out the manhole joint water blocking method of the third example. FIG. 15 shows a state in which a bypass hole that communicates with the inner part of the peripheral groove portion and opens to the inner peripheral wall surface is formed in the wall portion of the concrete side mass in the step of carrying out the manhole joint water blocking method of the third example. The vertical section explanatory view of the main part and FIG. 16 show the state in which the water blocking material is inserted into the peripheral groove portion of the peripheral groove portion to dam the peripheral groove portion in the step of implementing the manhole joint water blocking method of the third example. Explanatory drawing of the vertical section of the part, FIG. 17 is an explanatory view of the vertical section of the main part showing a state in which the peripheral groove portion is filled with a waterproof adhesive and sealed in the step of carrying out the manhole joint water blocking method of the third example. In the step of carrying out the second example of the manhole joint water blocking method of the third example, a vertical sectional explanatory view of a main part showing a state in which a sealing material is injected into a bypass hole formed in the wall portion of the concrete side block to seal the manhole. is there.

第３例の人孔接合部止水工法は、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て説明する。
第３例は、第２例と同様に、既設の人孔１における上下に積層されたコンクリート側塊２，２の接合部３から流入する水を止める人孔接合部止水工法である。 The manhole joint water blocking method of the third example is the same as that of the second example in the basic configuration, and the same configuration as that of the second example will be described with the same reference numerals.
The third example is a manhole joint water-stopping method for stopping water flowing in from the joint 3 of the concrete side lumps 2 and 2 stacked vertically in the existing manhole 1 as in the second example.

第３例では、第２例と同様に、まず、積層されたコンクリート側塊２，２の接合部３を、コンクリート側塊２，２の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部３に沿って周方向に切削してコンクリート側塊２，２の接合部３に内周側に開口する周溝部４を形成する（図１４参照。）。 In the third example, as in the second example, first, the joint portion 3 of the laminated concrete side lumps 2 and 2 is placed at a predetermined position within a range not exceeding the outer peripheral wall surface from the inner peripheral side of the concrete side lumps 2 and 2. By cutting along the joint portion 3 in the circumferential direction to form a peripheral groove portion 4 that opens to the inner peripheral side at the joint portion 3 of the concrete side blocks 2 and 2 (see FIG. 14).

つぎに、コンクリート側塊２，２の壁部に、コンクリート側塊２，２の外周壁面と周溝部４の奥部との間に存在する積層されたコンクリート側塊２，２の接合部３に連通し内周壁面に開口するバイパス穴７を形成する。バイパス穴７は、周溝部４へ挿入した後述する水膨潤止水材又は水膨張止水材からなる止水材が周溝部４へ流入する水の水圧により押し出されないように、外部からコンクリート側塊２，２の接合部３に入った水の一部をバイパスさせるものである。 Next, on the wall portion of the concrete side lumps 2 and 2, the joint portion 3 of the laminated concrete side lumps 2 and 2 existing between the outer peripheral wall surface of the concrete side lumps 2 and 2 and the inner portion of the peripheral groove portion 4 A bypass hole 7 is formed to open on the inner peripheral wall surface of the communication. The bypass hole 7 is provided on the concrete side from the outside so that the water-swelling water-stopping material or the water-swelling water-stopping material, which will be described later, inserted into the peripheral groove 4 is not pushed out by the water pressure of the water flowing into the peripheral groove 4. A part of the water that has entered the joint portion 3 of the lumps 2 and 2 is bypassed.

第３例では、周溝部４を形成してからバイパス穴７を形成しているが、バイパス穴７を形成してから周溝部４を形成してもよい。 In the third example, the bypass hole 7 is formed after the peripheral groove portion 4 is formed, but the peripheral groove portion 4 may be formed after the bypass hole 7 is formed.

バイパス穴７は、バイパス穴７を流れる流量がバイパス穴７に挿入した後述するシール材を押し出さない水圧となる流量に制限する径であることを要する。従って、バイパス穴７へバイパスさせる水量が多い場合は、バイパス穴７は、コンクリート側塊２，２の接合部３の周方向に任意の間隔を空けて複数形成することが好ましい。
本例では、バイパス穴７を接合部３の周方向に任意の間隔を空けて複数形成している（図１５参照。）。バイパス穴７の間隔や個数は、バイパス穴７へバイパスさせる水量やバイパス穴７へ挿入するシール材の材質などにより適宜設定する。 The bypass hole 7 is required to have a diameter that limits the flow rate flowing through the bypass hole 7 to a water pressure that does not push out the sealing material inserted into the bypass hole 7, which will be described later. Therefore, when the amount of water to be bypassed to the bypass holes 7 is large, it is preferable to form a plurality of bypass holes 7 at arbitrary intervals in the circumferential direction of the joint portion 3 of the concrete side blocks 2 and 2.
In this example, a plurality of bypass holes 7 are formed at arbitrary intervals in the circumferential direction of the joint portion 3 (see FIG. 15). The interval and number of the bypass holes 7 are appropriately set depending on the amount of water bypassed to the bypass holes 7 and the material of the sealing material to be inserted into the bypass holes 7.

また、本例では、バイパス穴７は接合部３を挟んで下側のコンクリート側塊２に形成しているが、これに限られるものではなく、図示しないが、第２例と同様に、上側のコンクリート側塊２に形成してもよく、また、下側と上側の両方のコンクリート側塊２，２に形成してもよい。 Further, in this example, the bypass hole 7 is formed in the concrete side block 2 on the lower side with the joint portion 3 interposed therebetween, but the present invention is not limited to this, and although not shown, the upper side is similar to the second example. It may be formed on the concrete side lumps 2 of the above, or may be formed on both the lower and upper concrete side lumps 2 and 2.

つぎに、周溝部４の溝奥に水膨潤材又は水膨張材からなる止水材５を環状に挿入する。周溝部４に挿入する環状の止水材５は、第１例と同様に、紐状の止水材５を周溝部４に沿って挿入し環状としている。
周溝部４内に挿入された止水材５は、外部からコンクリート側塊２，２の接合部３へ入り、周溝部４内に流入する水を吸いこみ膨潤又は膨張して周溝部４内周に圧接する。そして、外部からコンクリート側塊２，２の接合部３へ入った水は、接合部３に連通するバイパス穴７に流れるので、周溝部４の内周に圧接している止水材５に掛かる接合部３を通って周溝部４に流入した水の圧力を低く抑えることができる。これにより、接合部３を通って周溝部４に流入した水で止水材５が押し出されることなく、周溝部４が止水材５により確実に堰止められる（図１６参照。）。 Next, a water-stopping material 5 made of a water-swelling material or a water-swelling material is inserted in an annular shape into the groove depth of the peripheral groove portion 4. As for the annular water blocking material 5 to be inserted into the peripheral groove portion 4, the string-shaped water blocking material 5 is inserted along the peripheral groove portion 4 to form an annular shape, as in the first example.
The water blocking material 5 inserted into the peripheral groove portion 4 enters the joint portion 3 of the concrete side lumps 2 and 2 from the outside, sucks in the water flowing into the peripheral groove portion 4, and swells or expands to expand the inner circumference of the peripheral groove portion 4. Press on. Then, the water that has entered the joint portion 3 of the concrete side lumps 2 and 2 from the outside flows into the bypass hole 7 that communicates with the joint portion 3, and thus is applied to the water blocking material 5 that is in pressure contact with the inner circumference of the peripheral groove portion 4. The pressure of the water flowing into the peripheral groove portion 4 through the joint portion 3 can be suppressed to a low level. As a result, the peripheral groove portion 4 is reliably dammed by the water blocking material 5 without being pushed out by the water flowing into the peripheral groove portion 4 through the joint portion 3 (see FIG. 16).

ここで使用される止水材５となる水膨潤止水材、水膨張止水材としては、第２例と同様、吸水性ゴム、吸水性ポリマー、親水性ポリマーなどがあげられる。第２例では吸水性ポリマーを使用している。 Examples of the water-swelling water-stopping material and the water-swelling water-stopping material used here as the water-stopping material 5 include a water-absorbent rubber, a water-absorbent polymer, and a hydrophilic polymer, as in the second example. In the second example, a water-absorbent polymer is used.

また、本例では、周溝部４内に水膨潤止水材又は水膨張止水材の一方を止水材５として挿入しているが、第１例と同様に、水膨潤止水材と水膨張止水材を併せて止水材５として周溝部４内に挿入してもよい（図示せず。）。この場合、挿入する水膨潤止水材と水膨張止水材の後先については特に限定されない。 Further, in this example, one of the water-swelling water-stopping material and the water-swelling water-stopping material is inserted as the water-stopping material 5 in the peripheral groove portion 4, but as in the first example, the water-swelling water-stopping material and water An expansion water blocking material may be combined as a water blocking material 5 and inserted into the peripheral groove portion 4 (not shown). In this case, the tip of the water-swelling water-stopping material and the water-swelling water-stopping material to be inserted is not particularly limited.

つぎに、周溝部４に止水接着剤６を充填してシールする（図１７参照。）。
止水接着剤６にあっては、樹脂系接着剤、セメント型接着剤などが使用される。樹脂系接着剤としては、エポキシ樹脂、ウレタン樹脂、シリコーンゴム系樹脂などがあげられる。セメント型接着剤としては、ポリマーセメントモルタルがあげられる。 Next, the peripheral groove portion 4 is filled with the waterproof adhesive 6 and sealed (see FIG. 17).
As the water-stopping adhesive 6, a resin-based adhesive, a cement-type adhesive, or the like is used. Examples of the resin-based adhesive include epoxy resin, urethane resin, and silicone rubber-based resin. Examples of the cement type adhesive include polymer cement mortar.

第３例では、止水接着剤６は第２例と同様に、少なくともコンクリート側塊２，２の破壊より弱い力で剪断する弾性接着剤を使用している。弾性接着剤としては、弾性エポキシ樹脂、シリコンエラストマー、ゴムフィラー、ポリウエアを使用した熱硬化性樹脂等が使用されるが特に限定されないが、接着性、コンクリート側塊２，２の変位に対する追従性、更には耐薬品性、耐水性といった点から弾性エポキシ樹脂が好ましい。 In the third example, as in the second example, the waterproof adhesive 6 uses an elastic adhesive that shears at least with a force weaker than the fracture of the concrete side lumps 2 and 2. As the elastic adhesive, an elastic epoxy resin, a silicon elastomer, a rubber filler, a thermosetting resin using polyware, or the like is used, but the adhesiveness and the followability to the displacement of the concrete side lumps 2 and 2 are not particularly limited. Further, an elastic epoxy resin is preferable from the viewpoint of chemical resistance and water resistance.

つぎに、コンクリート側塊２，２の壁部に形成したバイパス穴７にシール材８を注入してシールする（図１８参照。）。
第２例では、ゴム等の弾性体からなる栓９をバイパス穴７の奥に圧入して止水してからシール材８を注入してシールしている。
シール材８として、エポキシ樹脂、ポリマーセメントモルタルがあげられる。本例ではポリマーセメントモルタルを使用している。 Next, the sealing material 8 is injected into the bypass holes 7 formed in the walls of the concrete side blocks 2 and 2 to seal them (see FIG. 18).
In the second example, a stopper 9 made of an elastic body such as rubber is press-fitted into the depth of the bypass hole 7 to stop water, and then a sealing material 8 is injected to seal the seal.
Examples of the sealing material 8 include epoxy resin and polymer cement mortar. In this example, polymer cement mortar is used.

以上のように構成される第３例の人孔接合部止水工法によれば、積層されたコンクリート側塊２，２の接合部を、コンクリート側塊２，２の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部３に沿って周方向に切削してコンクリート側塊２，２の接合部３に内周側に開口する周溝部４を形成するとともに、コンクリート側塊２，２の壁部に、コンクリート側塊２，２の接合部３に連通し内周壁面に開口するバイパス穴７を形成することにより、接合部３を通じて周溝部４へ流入する水がバイパス穴７に流れ、周溝部４を流れる水量が減少し、水圧が低くなり止水材５が挿入し易い状態となる。 According to the human hole joint water blocking method of the third example configured as described above, the joint portion of the laminated concrete side lumps 2 and 2 is formed on the outer peripheral wall surface from the inner peripheral side of the concrete side lumps 2 and 2. At a depth to a predetermined position within a range that does not exceed, cutting is performed in the circumferential direction along the joint portion 3 to form a peripheral groove portion 4 that opens to the inner peripheral side at the joint portion 3 of the concrete side blocks 2 and 2. Water flowing into the peripheral groove 4 through the joint 3 by forming a bypass hole 7 that communicates with the joint 3 of the concrete side lumps 2 and 2 and opens in the inner peripheral wall surface on the wall of the concrete side lumps 2 and 2. Flows into the bypass hole 7, the amount of water flowing through the peripheral groove portion 4 decreases, the water pressure becomes low, and the water blocking material 5 becomes easy to insert.

この状態で、周溝部４の溝奥に止水材５を挿入することにより、止水材５が流入する水を吸いこみ膨潤又は膨張して周溝部４の内周に圧接する。
そして、外部からコンクリート側塊２，２の接合部３へ入った水は、接合部３に連通するバイパス穴７に流れるので、周溝部４の内周に圧接した止水材５に掛かる水圧を低く抑えることができ、接合部３を通って周溝部４に流入した水で止水材５が押し出されることなく、周溝部４が止水材５により確実に堰止められる。 In this state, by inserting the water blocking material 5 into the groove depth of the peripheral groove portion 4, the water blocking material 5 sucks in the inflowing water and swells or expands to press contact with the inner circumference of the peripheral groove portion 4.
Then, the water that has entered the joint portion 3 of the concrete side lumps 2 and 2 from the outside flows into the bypass hole 7 that communicates with the joint portion 3, so that the water pressure applied to the water blocking material 5 that is pressed against the inner circumference of the peripheral groove portion 4 is applied. It can be kept low, and the peripheral groove portion 4 is reliably dammed by the water blocking material 5 without pushing out the water blocking material 5 by the water flowing into the peripheral groove portion 4 through the joint portion 3.

このようにして堰止めした周溝部４に止水接着剤６を充填することにより、周溝部４を確実にシールすることができる。
第３例では第２例と同様に、止水接着剤６は、少なくともコンクリート側塊の破壊より弱い力で剪断する弾性接着剤が使用されているので、地震によってコンクリート側塊の接合部が水平方向にずれたとき、水平方向にかかる応力は、コンクリート側塊の接合部に沿って周方向に切削された周溝部に充填された接合部全周にある弾性接着剤層全体に均等にかかることになるから、応力に対する耐力の向上が図れ、また、コンクリート側塊の接合部の水平方向へのずれが周溝部に充填された弾性接着剤で形成された弾性接着剤層の伸び率を超えた場合、コンクリート側塊に先んじて弾性接着剤層が剪断し、コンクリート側塊の破壊を防止することができるので、地震にも対応することができる。 By filling the peripheral groove portion 4 damped in this way with the waterproof adhesive 6, the peripheral groove portion 4 can be reliably sealed.
In the third example, as in the second example, the waterproof adhesive 6 uses an elastic adhesive that shears at least with a force weaker than the destruction of the concrete side mass, so that the joint portion of the concrete side mass is horizontal due to the earthquake. When deviated in the direction, the stress applied in the horizontal direction is evenly applied to the entire elastic adhesive layer on the entire circumference of the peripheral groove portion cut in the circumferential direction along the joint portion of the concrete side mass. Therefore, the resistance to stress can be improved, and the lateral displacement of the joint portion of the concrete side block exceeds the elongation rate of the elastic adhesive layer formed of the elastic adhesive filled in the peripheral groove portion. In this case, the elastic adhesive layer is sheared prior to the concrete side block to prevent the concrete side block from being destroyed, so that it is possible to cope with an earthquake.

そして、周溝部４に止水接着剤６を充填したら、コンクリート側塊２，２の壁部に形成したバイパス穴７にシール材８を注入してシールするが、バイパス穴７内を流れる水量は少ないので水圧が低く、バイパス穴７に注入したシール材８が押し出されることがなく、バイパス穴７をシール材８で確実にシールすることができる。 Then, when the peripheral groove portion 4 is filled with the waterproof adhesive 6, the sealing material 8 is injected into the bypass hole 7 formed in the wall portion of the concrete side lumps 2 and 2 to seal the seal, but the amount of water flowing in the bypass hole 7 is Since the amount is small, the water pressure is low, the sealing material 8 injected into the bypass hole 7 is not extruded, and the bypass hole 7 can be reliably sealed with the sealing material 8.

第３例では、バイパス穴７を接合部３の周方向に任意の間隔を空けて複数形成しているので、複数形成したバイパス穴７により、バイパスさせる水量を確保することができるとともに、バイパスする水を分散化することにより個々のバイパス穴７の小径化が図れ、バイパス穴７を流れる水の水圧をバイパス穴７に注入したシール材８を押し出さない水圧に抑える径にすることができる。 In the third example, since a plurality of bypass holes 7 are formed at arbitrary intervals in the circumferential direction of the joint portion 3, the amount of water to be bypassed can be secured and bypassed by the plurality of bypass holes 7 formed. By dispersing the water, the diameter of each bypass hole 7 can be reduced, and the water pressure of the water flowing through the bypass hole 7 can be set to a diameter that does not push out the sealing material 8 injected into the bypass hole 7.

これにより、外部からコンクリート側塊２，２の接合部３を通じて周溝部４へ流入する水量が多い場合であっても、周溝部４に挿入した止水材５が押し出されない程度に周溝部４へ流入する水量を減少させ、水圧を低くすることができるとともに、バイパス穴７をシール材８で確実にシールすることができる。
また、第３例では、第２例と同様に、ゴム等の弾性体からなる栓９をバイパス穴７の奥に圧入して止水してからシール材８を注入してシールしているので、バイパス穴７の水の流れが無い状態でシール材８を注入することができ、シール材８の注入作業を容易に行うことができる。 As a result, even when the amount of water flowing into the peripheral groove portion 4 from the outside through the joint portion 3 of the concrete side lumps 2 and 2 is large, the peripheral groove portion 4 is not extruded to the extent that the water blocking material 5 inserted in the peripheral groove portion 4 is not pushed out. The amount of water flowing into the water can be reduced, the water pressure can be lowered, and the bypass hole 7 can be reliably sealed with the sealing material 8.
Further, in the third example, as in the second example, the stopper 9 made of an elastic body such as rubber is press-fitted into the depth of the bypass hole 7 to stop water, and then the sealing material 8 is injected to seal the seal. The sealing material 8 can be injected without the flow of water in the bypass hole 7, and the sealing material 8 can be easily injected.

１ 人孔
２，２ コンクリート側塊
３ 接合部
４ 周溝部
５ 止水材
６ 止水接着剤
７ バイパス穴
８ シール材
９ 栓
1 Manhole 2, 2 Concrete side block 3 Joint 4 Peripheral groove 5 Water blocking material 6 Water blocking adhesive 7 Bypass hole 8 Sealing material 9 Plug

Claims (6)

積層されたコンクリート側塊の接合部から流入する水を止める人孔接合部防水工法であって、積層された前記コンクリート側塊の接合部を、前記コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して前記コンクリート側塊の接合部に内周側に開口する周溝部を形成し、つぎに、前記周溝部の溝奥に水膨潤材又は水膨張材からなる止水材を挿入して前記周溝部を堰止めし、つぎに、前記周溝部に止水接着剤を充填してシールすることを特徴とする人孔接合部止水工法。 It is a human hole joint waterproofing method that stops the water flowing in from the joint of the laminated concrete side mass, and the joint of the laminated concrete side mass is extended from the inner peripheral side of the concrete side mass to the outer peripheral wall surface. At a depth to a predetermined position within a range that does not exist, cutting is performed in the circumferential direction along the joint portion to form a peripheral groove portion that opens to the inner peripheral side at the joint portion of the concrete side block, and then the peripheral groove portion A person characterized in that a water-stopping material made of a water-swelling material or a water-swelling material is inserted into the groove to dam the peripheral groove portion, and then the peripheral groove portion is filled with a water-stopping adhesive to seal the peripheral groove portion. Hole joint water stop method. 積層されたコンクリート側塊の接合部から流入する水を止める人孔接合部防水工法であって、積層された前記コンクリート側塊の接合部を、前記コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して前記コンクリート側塊の接合部に内周側に開口する周溝部を形成するとともに、前記コンクリート側塊の壁部に、前記周溝部の奥部に連通し内周壁面に開口するバイパス穴を形成し、つぎに、前記周溝部の溝奥で、前記バイパス穴の手前或いは跨がる位置に水膨潤材又は水膨張材からなる止水材を挿入して前記周溝部を堰止めし、つぎに、前記周溝部に止水接着剤を充填してシールし、つぎに、前記コンクリート側塊の壁部に形成した前記バイパス穴にシール材を注入してシールすることを特徴とする人孔接合部止水工法。 It is a human hole joint waterproofing method that stops the water flowing in from the joint of the laminated concrete side mass, and the joint of the laminated concrete side mass is extended from the inner peripheral side of the concrete side mass to the outer peripheral wall surface. A peripheral groove portion that opens to the inner peripheral side is formed at the joint portion of the concrete side mass by cutting in the circumferential direction along the joint portion at a depth to a predetermined position within a range that does not exist, and the wall of the concrete side mass. A bypass hole that communicates with the inner part of the peripheral groove portion and opens to the inner peripheral wall surface is formed in the portion, and then a water swelling material or a water swelling material or a water swelling material or a position that extends in front of or straddles the bypass hole in the groove of the peripheral groove portion. A water blocking material made of a water expansion material is inserted to dam the peripheral groove portion, then the peripheral groove portion is filled with a waterproof adhesive to seal it, and then it is formed on the wall portion of the concrete side block. A method for stopping water at a human hole joint, which comprises injecting a sealing material into the bypass hole to seal the concrete. 前記コンクリート側塊の壁部に形成する前記バイパス穴は、前記周溝部の周方向に任意の間隔を空けて複数形成することを特徴とする請求項２に記載の人孔接合部止水工法。 The manhole joint water blocking method according to claim 2, wherein a plurality of the bypass holes formed in the wall portion of the concrete side block are formed at arbitrary intervals in the circumferential direction of the peripheral groove portion. 積層されたコンクリート側塊の接合部から流入する水を止める人孔接合部防水工法であって、積層された前記コンクリート側塊の接合部を、前記コンクリート側塊の内周側から外周壁面を超えない範囲の所定の位置までの深さで、接合部に沿って周方向に切削して前記コンクリート側塊の接合部に内周側に開口する周溝部を形成するとともに、前記コンクリート側塊の壁部に、前記コンクリート側塊の外周壁面と前記周溝部の奥部との間に存在する積層された前記コンクリート側塊の接合部に連通し内周壁面に開口するバイパス穴を形成し、つぎに、前記周溝部の溝奥に水膨潤材又は水膨張材からなる止水材を挿入して前記周溝部を堰止めし、つぎに、前記周溝部に止水接着剤を充填してシールし、つぎに、前記コンクリート側塊の壁部に形成した前記バイパス穴にシール材を注入してシールすることを特徴とする人孔接合部止水工法。 It is a human hole joint waterproofing method that stops the water flowing in from the joint of the laminated concrete side mass, and the joint of the laminated concrete side mass is extended from the inner peripheral side of the concrete side mass to the outer peripheral wall surface. A peripheral groove portion that opens to the inner peripheral side is formed at the joint portion of the concrete side mass by cutting in the circumferential direction along the joint portion at a depth to a predetermined position within a range that does not exist, and the wall of the concrete side mass. A bypass hole is formed in the portion so as to communicate with the joint portion of the laminated concrete side mass existing between the outer peripheral wall surface of the concrete side mass and the inner portion of the peripheral groove portion and open to the inner peripheral wall surface. , A water-stopping material made of a water-swelling material or a water-swelling material is inserted into the groove depth of the peripheral groove to block the peripheral groove, and then the peripheral groove is filled with a water-stopping adhesive to seal it. Next, a human hole joint water blocking method, characterized in that a sealing material is injected into the bypass hole formed in the wall portion of the concrete side block to seal the concrete. 前記コンクリート側塊の壁部に形成する前記バイパス穴は、前記コンクリート側塊の外周壁面と前記周溝部の奥部との間に存在する積層された前記コンクリート側塊の接合部の周方向に任意の間隔を空けて複数形成することを特徴とする請求項４に記載の人孔接合部止水工法。 The bypass hole formed in the wall portion of the concrete side block is arbitrary in the circumferential direction of the joint portion of the laminated concrete side block existing between the outer peripheral wall surface of the concrete side block and the inner portion of the peripheral groove portion. The manhole joint water blocking method according to claim 4, wherein a plurality of concrete pieces are formed at intervals. 前記周溝部に充填する止水接着剤は、少なくとも前記コンクリート側塊の破壊より弱い力で剪断する弾性接着剤であることを特徴とする請求項１から５のいずれか１項に記載の人孔接合部止水工法。
The human hole according to any one of claims 1 to 5, wherein the waterproof adhesive to be filled in the peripheral groove portion is an elastic adhesive that shears at least with a force weaker than the fracture of the concrete side block. Joint water stop method.
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5273954U (en) * 1975-11-29 1977-06-02
JPS5791855U (en) * 1980-11-21 1982-06-05
JPS5811227A (en) * 1981-07-14 1983-01-22 Haneda Fume Can Kk Coupling method of vertical concrete cylinder
JPS6014145U (en) * 1983-07-07 1985-01-30 江端商事株式会社 Cylindrical body for manholes equipped with a hole for filling sealant and a circumferential groove
JPS62138747U (en) * 1986-02-21 1987-09-01
JPH07247564A (en) * 1994-03-11 1995-09-26 Nishikawa Rubber Co Ltd Annular sealing material for manhole joint
JP2002004312A (en) * 2000-06-23 2002-01-09 Three Bond Co Ltd Method and structure for joining aseismatic concrete member
JP2013194372A (en) * 2012-03-16 2013-09-30 Sanritsu:Kk Earthquake-proofing method of existent manhole
JP2014058844A (en) * 2012-09-19 2014-04-03 Tokyo Metropolitan Sewerage Service Corp Manhole protection method coping with earthquake

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5273954U (en) * 1975-11-29 1977-06-02
JPS5791855U (en) * 1980-11-21 1982-06-05
JPS5811227A (en) * 1981-07-14 1983-01-22 Haneda Fume Can Kk Coupling method of vertical concrete cylinder
JPS6014145U (en) * 1983-07-07 1985-01-30 江端商事株式会社 Cylindrical body for manholes equipped with a hole for filling sealant and a circumferential groove
JPS62138747U (en) * 1986-02-21 1987-09-01
JPH07247564A (en) * 1994-03-11 1995-09-26 Nishikawa Rubber Co Ltd Annular sealing material for manhole joint
JP2002004312A (en) * 2000-06-23 2002-01-09 Three Bond Co Ltd Method and structure for joining aseismatic concrete member
JP2013194372A (en) * 2012-03-16 2013-09-30 Sanritsu:Kk Earthquake-proofing method of existent manhole
JP2014058844A (en) * 2012-09-19 2014-04-03 Tokyo Metropolitan Sewerage Service Corp Manhole protection method coping with earthquake

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