JP2013100669A - Tubular buried object and manufacturing method thereof - Google Patents

Tubular buried object and manufacturing method thereof Download PDF

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JP2013100669A
JP2013100669A JP2011244510A JP2011244510A JP2013100669A JP 2013100669 A JP2013100669 A JP 2013100669A JP 2011244510 A JP2011244510 A JP 2011244510A JP 2011244510 A JP2011244510 A JP 2011244510A JP 2013100669 A JP2013100669 A JP 2013100669A
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tubular
sheet member
embedded object
wall surface
pair
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JP6061238B2 (en
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Takamitsu Tazawa
貴光 田澤
Kazuhiko Sekimoto
和彦 関本
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Shintoku Kogyo Co Ltd
Fujimura Fume Kan KK
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Shintoku Kogyo Co Ltd
Fujimura Fume Kan KK
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Abstract

PROBLEM TO BE SOLVED: To provide a tubular buried object in which earthquake resistance and water-tightness of a tubular buried object which has been buried already or is to be buried can be improved, and a manufacturing method thereof.SOLUTION: In a tubular buried object (1), a fragile part (3) is formed to induce cracking in a joint part (J) or on a wall surface between tubular buried objects (1) which are provided successively forward and backward. The tubular buried object (1) comprises a pair of recessed grooves (4) which are recessed on the wall surface of the tubular buried object (1) and at positions on both sides with the joint part (J) or the fragile part (3) interposed therebetween, a sheet member (6) which is disposed between one recessed groove (4a) and another recessed groove (4b) and covers the joint part (J) or the fragile part (3), and a fixing member (8) which is held internally between the recessed grooves (4) together with the sheet member (6) and holds and fixes the sheet member (6).

Description

本発明は、既に埋設され又は今後埋設される管渠に耐震性及び水密性を付与する管状埋設物及びその製造方法に関する。   The present invention relates to a tubular embedment that imparts earthquake resistance and water tightness to pipes that have already been buried or will be buried in the future, and a method for manufacturing the same.

高レベルな地震が発生すると、下水道、雨水排水、電気・通信、地下通路など、地下に埋設されている管渠(管状埋設物)に甚大な被害をおよぼし、その復旧には多大な時間と費用を要する。
地震時の地震動や地盤の不等沈下などによる管渠の被害としては、ひび、破損、抜け出し、ずれなどがあるが、これらは管渠の継目部分、あるいは地盤が変化する場所に集中して発生する。
When a high-level earthquake occurs, it will cause tremendous damage to pipes (tubular objects) buried underground such as sewers, rainwater drainage, electricity / communications, underground passages, etc., and it will take a lot of time and money to restore them. Cost.
Damage to pipes due to earthquake motion or uneven settlement of the ground during an earthquake includes cracks, breakage, slipping out, slipping, etc., but these are concentrated in the joints of pipes or where the ground changes. To do.

特に管渠の継目部分での抜け出しやずれ、地盤の急変部で管渠の折れ、破損などが発生すると、管渠内への浸水、土砂の流入・堆積がおこり、流下機能を阻害してしまう。
このような管渠被害への対応策として、最近では管渠の敷設時、あるいは築造時に耐震性を有する可撓継手や可撓部材が用いられるようになってきている。
In particular, if the pipe is pulled out or displaced at the seam, or if the pipe breaks or breaks at a sudden change in the ground, water will flow into the pipe, sediment will flow into or accumulate, and the flow-down function will be hindered. .
Recently, flexible joints and flexible members having earthquake resistance have been used as countermeasures against such damage to pipes when laying or building pipes.

特許文献1及び特許文献2に記載の発明は、環状シート部材(ゴム製)を目地部に設置して、その内側からステンレス製などの円筒形スリーブを拡径して、環状シート部材を管路内周面に押圧設置するものである。   In the inventions described in Patent Document 1 and Patent Document 2, an annular sheet member (made of rubber) is installed at the joint, a cylindrical sleeve made of stainless steel or the like is expanded from the inside thereof, and the annular sheet member is connected to the pipe It is pressed on the inner peripheral surface.

この方法は、円形の函渠では、円筒形のスリーブを拡径することにより、止水用部材である環状シート部材を管渠内周面に均等な力で押し付けることができるため、地震時などで管渠の抜出し、ずれなどがあった場合でも、その動きに追従して押圧力を保持して水密性の確保が可能となっている。   In this method, in the case of a circular box, by expanding the diameter of the cylindrical sleeve, it is possible to press the annular sheet member, which is a water-stopping member, against the inner peripheral surface of the pipe wall with an equal force. Even when the pipe rod is pulled out or displaced, it is possible to ensure water tightness by keeping the pressing force following the movement.

特開2006−144229号公報JP 2006-144229 A 特開2006−83888号公報JP 2006-83888 A

しかし、上記特許文献1及び特許文献2に記載のものでは、以下に示すような問題がある。   However, those described in Patent Document 1 and Patent Document 2 have the following problems.

(1)上記方法では、矩形、あるいは馬蹄形の管渠に環状シート部材を均等な力で押し付けることができない。   (1) In the above method, the annular sheet member cannot be pressed against the rectangular or horseshoe-shaped tube rod with equal force.

(2)管渠にホールインアンカーを打込んでボルトによって環状シート部材を固定する方法もあるが、この場合、土砂などの流入はある程度防止できるが、水圧がかかったときに、ボルトとボルトの間では、ボルト近傍に比べて加圧力が弱く、この部分から漏水が発生するため確実な水密性を確保することは難しい。   (2) There is a method of driving the hole-in anchor into the pipe rod and fixing the annular sheet member with bolts. In this case, inflow of earth and sand can be prevented to some extent, but when water pressure is applied, In the meantime, the applied pressure is weaker than that in the vicinity of the bolt, and water leakage occurs from this portion, so it is difficult to ensure reliable water tightness.

(3)ボルトによる固定と接着剤などで管渠と環状シート部材の接着を併用することも考えられるが、既設管渠では水などが流れている場合があり、確実な接着は困難である。また、地震時など動いた場合に、接着が剥がれてしまう虞れがある。   (3) Although it is conceivable to use a bolt and fixing the annular sheet member together by fixing with a bolt and an adhesive, water or the like may flow in the existing pipe so that reliable bonding is difficult. Moreover, there is a possibility that the adhesion may be peeled off when moving during an earthquake.

(4)剛性のある鋼材などで押え付ける方法も考えられるが、この場合、部材が流水面に突出するため流下機能を阻害する。また、部材が大掛かりになるため現実的でない。   (4) Although a method of pressing with a rigid steel material or the like is also conceivable, in this case, the member protrudes on the surface of the water flow so that the flow down function is hindered. Moreover, since a member becomes large, it is not realistic.

本発明は、上記した従来技術における問題点を解消すべく、既に埋設され又はこれから埋設される管状埋設物(管渠)の耐震性及び水密性を向上させる管状埋設物及びその製造方法を創出することを課題とする。   In order to solve the above-described problems in the prior art, the present invention creates a tubular buried object that improves the earthquake resistance and water tightness of a tubular buried object (pipe) that is already buried or will be buried in the future, and a method for manufacturing the same. This is the issue.

上記課題を解決するための手段のうち、第1の発明の構成は、前後に連設された管状埋設物間の継目部又は壁面にひび割れを誘導する脆弱部が形成された管状埋設物において、
管状埋設物の壁面で且つ継目部又は脆弱部を挟んだ両側の位置に凹設された一対の凹溝と、一方の凹溝と他方の凹溝との間に配置されて継目部又は脆弱部を覆うシート部材と、凹溝内にシート部材と共に挟み込まれてシート部材を保持固定する固定部材と、を有することを特徴とする、と云うものである。
Among the means for solving the above-mentioned problems, the configuration of the first invention is a tubular buried object in which a fragile part for inducing cracks is formed in a joint part or a wall surface between the tubular embedded parts arranged in front and rear,
A seam portion or a fragile portion that is disposed between a pair of concave grooves provided on both sides of the wall surface of the tubular embedded object and sandwiching the joint portion or the fragile portion, and one concave groove and the other concave groove. And a fixing member that is sandwiched together with the sheet member in the groove to hold and fix the sheet member.

第1の発明では、継目部又は脆弱部をシート部材で覆うことにより管状埋設物内への水の浸入、あるいは土砂の流入・堆積を防止するが、継目部又は脆弱部の両側に形成した一対の凹溝内に固定部材をシート部材と共に狭入することにより、シート部材の固定を達成する。   In the first invention, the seam portion or the fragile portion is covered with a sheet member to prevent water intrusion into the tubular buried object or inflow and accumulation of earth and sand, but a pair formed on both sides of the seam portion or the fragile portion. The fixing of the sheet member is achieved by narrowing the fixing member together with the sheet member in the concave groove.

凹溝は、管状埋設物の製造時に、埋設後に管状埋設物の継目部となる目地位置の近傍(管状埋設物の両端)にあらかじめ形成してもよいし、既設の管状埋設物の場合には、継目部を挟んだ両側の位置にそれぞれ削設することにより形成したものであってもよい。   The concave groove may be formed in advance in the vicinity of the joint position (both ends of the tubular embedded object) that becomes the joint portion of the tubular embedded object after the embedding, in the case of manufacturing the tubular embedded object. It may be formed by cutting at positions on both sides of the joint portion.

管状埋設物としては、例えばコンクリート製の流水管路を挙げることができるが、一般的な円筒状の管渠に限られるものではなく、例えば矩形状のボックスカルバート、多角形状、あるいは馬蹄形状の管渠などその他の形状から構成される管渠であってもよい。   Examples of the tubular embedment include concrete flowing water pipes, but are not limited to general cylindrical pipe culverts. For example, rectangular box culverts, polygonal or horseshoe-shaped pipes are used. It may be a tube tub composed of other shapes such as a jar.

また、第1の発明の他の構成は、請求項1に記載の発明において、シート部材の幅方向の両端に、断面U字形状からなる挟持部を形成した、と云うものである。   According to another configuration of the first invention, in the invention described in claim 1, sandwiching portions having a U-shaped cross section are formed at both ends in the width direction of the sheet member.

上記構成では、シート部材及び固定部材の凹溝内への挿入を容易にすると共に、シート部材の確実な固定を達成する。   In the above configuration, the sheet member and the fixing member can be easily inserted into the concave grooves, and the sheet member can be reliably fixed.

また、第1の発明の他の構成は、請求項1又は2に記載の発明において、シート部材が蛇腹状の伸縮部を備える、と云うものである。   According to another configuration of the first invention, in the invention according to claim 1 or 2, the sheet member includes a bellows-like stretchable portion.

上記構成では、シート部材の全体の大きさをコンパクト化することができると共に、蛇腹状の伸縮部がシート部材に大きな伸び代を付与することで、特に継目部に大きな隙間が発生した場合の対応が可能となる。   In the above configuration, the overall size of the sheet member can be reduced, and the bellows-like stretchable part gives the sheet member a large extension allowance, particularly when a large gap occurs in the joint part. Is possible.

また、第1の発明の他の構成は、請求項1乃至3のいずれか一項に記載の発明において、一対の凹溝内に、断面コの字形状からなる補強部材を設けた、と云うものである。   According to another configuration of the first invention, in the invention according to any one of the first to third aspects, a reinforcing member having a U-shaped cross section is provided in the pair of concave grooves. Is.

上記の構成では、凹溝の精度を高めることにより、固定部材と凹溝の壁面との間に挟んでシート部材を押え付ける圧着力の低下防止を達成する。補強部材の材質としては、金属製が好ましく、特には強度及び防錆効果に優れたステンレスが好ましい。   In the above configuration, by increasing the accuracy of the groove, it is possible to prevent a reduction in the pressing force that presses the sheet member between the fixing member and the wall surface of the groove. As the material of the reinforcing member, metal is preferable, and stainless steel excellent in strength and rust prevention effect is particularly preferable.

また、第1の発明の他の構成は、請求項1乃至4のいずれか一項に記載の発明において、固定部材を鋼管で形成した、と云うものである。   According to another configuration of the first invention, in the invention described in any one of the first to fourth aspects, the fixing member is formed of a steel pipe.

上記構成では、凹溝内に固定部材を挿入した後、固定部材を加圧して凹溝幅方向へ断面略楕円形状に変形させることで、凹溝の両壁面からのより強い反力を得てシート部材の確実な保持固定を達成する。   In the above configuration, after inserting the fixing member into the groove, the fixing member is pressurized and deformed into a substantially elliptical cross section in the groove width direction to obtain a stronger reaction force from both wall surfaces of the groove. Reliable holding and fixing of the sheet member is achieved.

また、第1の発明の他の構成は、請求項5記載の発明において、鋼管を断面楕円状とした、と云うものである。   According to another configuration of the first invention, in the invention described in claim 5, the steel pipe has an elliptical cross section.

上記構成では、幅寸法の狭い凹溝内への固定部材の挿入を容易にすると共に、固定部材を凹溝内で加圧・変形させることで、シート部材をより大きな力で凹溝幅方向に圧着することにより、固定部材の脱落防止を確実に達成する。   In the above configuration, it is easy to insert the fixing member into the groove having a narrow width, and the fixing member is pressed and deformed in the groove so that the sheet member is moved in the groove width direction with a greater force. By crimping, the fixing member is surely prevented from falling off.

また、第1の発明の他の構成は、請求項1乃至6のいずれか一項に記載の発明において、一対の凹溝を管状埋設物の壁面に沿って周状に形成すると共に、シート部材を環帯状に形成し且つ固定部材を線状又は円弧状に形成した、と云うものである。   According to another configuration of the first invention, in the invention according to any one of claims 1 to 6, a pair of concave grooves are formed circumferentially along the wall surface of the tubular embedded object, and the sheet member Is formed in a ring band shape, and the fixing member is formed in a linear shape or an arc shape.

上記構成では、環帯状のシート部材で管状埋設物の壁面を周方向に切れ目なく覆うことにより、地震動あるいは不等沈下などによって脆弱部に発生したひび割れ及び前後する管状埋設物間の継目部からの浸水や土砂の流入の防止を達成する。   In the above configuration, by covering the wall surface of the tubular buried object with a ring-shaped sheet member in the circumferential direction without any breaks, cracks generated in the fragile part due to seismic motion or unequal subsidence and the joint part between the tubular buried objects moving back and forth. Achieve prevention of inundation and inflow of earth and sand.

また、第1の発明の他の構成は、請求項1乃至7のいずれか一項に記載の発明において、一対の凹溝、シート部材及び固定部材を管状埋設物の内壁面に設けた、と云うものである。   According to another configuration of the first invention, in the invention according to any one of claims 1 to 7, a pair of concave grooves, a sheet member, and a fixing member are provided on the inner wall surface of the tubular embedded object. It is said.

すなわち、一対の凹溝、シート部材及び固定部材を管状埋設物の内壁面に設けることもできるし、埋設前の管状埋設物であれば管状埋設物の外壁面に設けることもできる。   That is, the pair of concave grooves, the sheet member, and the fixing member can be provided on the inner wall surface of the tubular embedded object, or can be provided on the outer wall surface of the tubular embedded object as long as it is a tubular embedded object before being embedded.

また、第1の発明の他の構成は、請求項1乃至8のいずれか一項に記載の発明において、シート部材を覆う保護カバーを設けた、と云うものである。   According to another configuration of the first invention, in the invention according to any one of claims 1 to 8, a protective cover for covering the sheet member is provided.

上記構成では、シート部材の表面を保護カバーで覆うことにより、地震動などによって管状埋設物の継目部が開き、土砂あるいは水などの圧力がシート部材に作用した際、シート部材が圧力により膨らみ管状埋設物の内側に突出することを防止する。   In the above configuration, by covering the surface of the sheet member with a protective cover, the seam portion of the tubular embedded object is opened due to earthquake motion or the like, and when the pressure of earth or sand or water acts on the sheet member, the sheet member expands due to the pressure and the tubular embedded Prevents protruding inside the object.

また、第1の発明の他の構成は、請求項9記載の発明において、保護カバーが、管状埋設物側に固定されてシート部材の両端部をそれぞれ覆う一対の端部カバーと、両端部を除くシート部材の中央部を覆うと共に端部カバーに対してスライド可能に取り付けられた中央カバーとを有して構成される、と云うものである。   According to another configuration of the first invention, in the invention according to claim 9, the protective cover includes a pair of end covers that are fixed to the tubular embedded object side and respectively cover both ends of the sheet member, and both ends. The sheet cover is configured to have a central cover that covers the central part of the sheet member excluding and is slidably attached to the end cover.

上記構成では、地震動などによって管状埋設物の継目部が開いてシート部材が伸び変形しても、それに追従して保護カバーがスライド移動することで変形後においてもシート部材を保護すると共に、シート部材が土砂あるいは水などの圧力により膨らみ、管状埋設物の内側への突出を防止することを達成する。   In the above configuration, even when the seam portion of the tubular embedded object is opened due to an earthquake motion and the sheet member is stretched and deformed, the protective cover slides to follow the sheet member to protect the sheet member even after the deformation, and the sheet member This swells due to the pressure of earth or sand or water, and achieves the prevention of the inward projection of the tubular buried object.

また、第1の発明の他の構成は、請求項1乃至10のいずれかに一項に記載の発明において、凹溝と対向する位置に、固定部材が凹溝から抜け出るのを防止する脱落防止部材を設けた、と云うものである。   According to another configuration of the first invention, in the invention according to any one of the first to tenth aspects, the falling member prevents the fixing member from coming out of the groove at a position facing the groove. It is said that a member is provided.

上記構成では、凹溝内からの固定部材の脱落防止をより確実に達成する。   With the above configuration, the prevention of the fixing member from falling out of the concave groove is more reliably achieved.

また第1の発明の他の構成は、請求項11に記載の発明において、端部カバーの一部を凹溝に対向させることにより脱落防止部材とした、と云うものである。   According to another configuration of the first invention, in the invention according to claim 11, a part of the end cover is made to face the concave groove to form a drop-off preventing member.

上記構成では、スライド可能に取り付けられた保護カバーにおける凹溝内からの固定部材の脱落防止を達成する。   In the above configuration, the fixing member is prevented from falling out of the recessed groove in the slidably attached protective cover.

また、第2の発明の構成は、前後に連設された管状埋設物間の継目部又は壁面にひび割れを誘導する脆弱部が形成された管状埋設物の製造方法において、
管状埋設物の壁面で且つ継目部又は脆弱部を挟んだ両側に一対の凹溝をそれぞれ凹設する第1の工程と、一方の凹溝と他方の凹溝との間にシート部材を配置されて継目部又は脆弱部を覆う第2の工程と、一対の固定部材をシート部材と共に一対の凹溝のそれぞれに狭入してシート部材を固定する第3の工程と、を有することを特徴とする、と云うものである。
Further, the configuration of the second invention is a method for producing a tubular embedded object in which a weakened portion that induces cracks is formed in a joint portion or a wall surface between the tubular embedded objects arranged in the front-rear direction.
A sheet member is disposed between the first step of forming a pair of concave grooves on both sides of the wall surface of the tubular embedded object and sandwiching the joint portion or the fragile portion, and one concave groove and the other concave groove. And a second step of covering the joint portion or the fragile portion, and a third step of narrowing the pair of fixing members together with the sheet member into each of the pair of concave grooves to fix the sheet member. It is said to be.

上記構成では、継目部又は脆弱部をシート部材で覆うと共に、継目部又は脆弱部の両側に形成した一対の凹溝内に固定部材を狭入することにより、シート部材を固定部材で強固に圧着して保持固定する管状埋設物の製造方法を達成する。   In the above configuration, the seam portion or the fragile portion is covered with the sheet member, and the sheet member is firmly crimped by the fixing member by narrowly inserting the fixing member into the pair of concave grooves formed on both sides of the seam portion or the fragile portion. Thus, the manufacturing method of the tubular embedded object to be held and fixed is achieved.

また、第2の発明の他の構成は、請求項13に記載の発明において、一対の凹溝をそれぞれ凹設する第1の工程の後に、一対の凹溝の内面に断面コの字形状からなる補強部材を設ける工程を有する、と云うものである。   According to another configuration of the second invention, in the invention according to claim 13, after the first step of forming the pair of concave grooves, the inner surfaces of the pair of concave grooves have a U-shaped cross section. It has the process of providing the reinforcing member which becomes.

上記構成では、凹溝内におけるシート部材を押える圧着力を一定とすることを達成する。   With the above-described configuration, it is possible to achieve a constant pressing force for pressing the sheet member in the groove.

また、第2の発明の他の構成は、請求項13又は14に記載の発明において、断面中空円形状の固定部材を凹溝内に挿入する第3の工程の後に、固定部材を加圧して凹溝幅方向へ断面略楕円形状に押し潰す工程を備える、と云うものである。   According to another configuration of the second invention, in the invention according to claim 13 or 14, the fixing member is pressurized after the third step of inserting the fixing member having a hollow circular cross section into the groove. It includes a step of crushing into a substantially elliptical cross section in the width direction of the groove.

上記構成では、固定部材を凹溝内で押し潰すことにより、シート部材に対する圧着力を高めることを達成する。   In the above configuration, the crimping force to the sheet member is increased by crushing the fixing member in the concave groove.

また、第2の発明の他の構成は、請求項13乃至15のいずれか一項に記載の発明において、第1乃至第3の工程を管状埋設物の内壁面に対して行う、と云うものである。   According to another configuration of the second invention, in the invention according to any one of claims 13 to 15, the first to third steps are performed on the inner wall surface of the tubular embedded object. It is.

上記構成では、埋設前の管状埋設物であるか、または既設の管状埋設物であるかを問わず、シート部材の迅速且つ容易な取り付けを達成する。   In the above configuration, the sheet member can be quickly and easily attached regardless of whether it is a tubular buried object before being buried or an existing tubular buried object.

本発明は、上記した構成となっているので、以下に示す効果を奏する。
第1の発明においては、管状埋設物の形状が円形であるか、矩形であるかなど、形状を問わず、高い水密性を備えた耐震継手構造からなる管状埋設物とすることができる。しかも簡単な構成であるため、ある程度の流水下でも施工することができ、施工乃至は製造コストを低減できる。
Since the present invention has the above-described configuration, the following effects can be obtained.
In 1st invention, it can be set as the tubular embedment which consists of an earthquake-resistant joint structure provided with high watertightness regardless of the shape whether the shape of the tubular embedment is circular or rectangular. And since it is a simple structure, it can construct even under a certain amount of flowing water, and construction or manufacturing cost can be reduced.

また、シート部材の幅方向の両端に、断面U字形状からなる挟持部を形成した構成にあっては、シート部材及び固定部材の凹溝内への挿入を容易とすることができると共に、シート部材が脱落しない程度に仮固定できるため、施工性が向上する。また、シート部材を設置固定した際に、シート部材両端部のはみ出しがないため、流下機能を阻害することがない。   Further, in the configuration in which the sandwiching portions having a U-shaped cross section are formed at both ends in the width direction of the sheet member, the sheet member and the fixing member can be easily inserted into the recessed grooves, and the sheet Since the member can be temporarily fixed to such an extent that the member does not fall off, the workability is improved. In addition, when the sheet member is installed and fixed, there is no protrusion of both ends of the sheet member, so that the flow-down function is not hindered.

また、シート部材が蛇腹状の伸縮部を備える構成にあっては、特に地震などにおいて、連設された一方の管状埋設物と他方の管状埋設物との継目部分(目地部分)に大きな外力が作用して互いに離れ、軸方向又は径方向に大きく位置ずれした場合であっても、蛇腹状の伸縮部がこれらの動きに追従して伸びることにより、管渠内への浸水及び土砂の流入の防止を効果的に達成することができる。また蛇腹状の伸縮部を有しないシート部材を用いる場合には、伸縮性に富むシート材料を選定する。   Further, in the configuration in which the sheet member includes the bellows-like stretchable part, particularly in an earthquake or the like, a large external force is applied to the joint portion (joint portion) between one tubular embedded object and the other tubular embedded object. Even when they are separated from each other and are greatly displaced in the axial direction or the radial direction, the bellows-like stretchable part extends following these movements, so that water intrusion and inflow of earth and sand into the pipe rod are prevented. Prevention can be achieved effectively. Moreover, when using the sheet | seat member which does not have a bellows-like expansion-contraction part, the sheet material which is rich in a stretching property is selected.

また、既設の管状埋設物では厳しい条件下での作業となるため、凹溝の深さ、幅、高さの各寸法を高精度に削設することが困難であり、凹溝に蛇行などの施工誤差が発生しやすい。   In addition, since the existing tubular buried works under severe conditions, it is difficult to cut the depth, width, and height dimensions of the groove with high accuracy, such as meandering in the groove. Construction errors are likely to occur.

そこで、一対の凹溝内に、断面コの字形状からなる補強部材を設けた構成にあっては、凹溝に曲がりや、幅の不均一、あるいは溝の角が欠けるなどの不具合が発生しても凹溝の精度を維持し、シート部材を押える圧着力の低下を防止することができる。よって、水圧が掛かった場合や地震時などにおいて、固定部材が凹溝から脱落し、シート部材の保持固定ができなくなって、浸水や土砂の流入が起こるような二次的災害の発生を未然に防止することが可能となる。   Therefore, in a configuration in which a reinforcing member having a U-shaped cross section is provided in a pair of concave grooves, problems such as bending of the concave grooves, uneven width, or missing corners of the grooves occur. However, it is possible to maintain the accuracy of the concave groove and prevent a decrease in the pressure-bonding force for pressing the sheet member. Therefore, when water pressure is applied or during an earthquake, the fixing member falls out of the recessed groove, and it becomes impossible to hold and fix the sheet member, so that secondary disasters such as inundation and inflow of earth and sand may occur. It becomes possible to prevent.

また、固定部材を鋼管で形成した構成にあっては、安価な部材であり、且つ管状埋設物の形状に合わせた加工が容易にできるため、施工コストを低廉なものとすることができる。また、施工後には鋼管は凹溝内に収納され、流水面側に突出されることがないため、流下機能の低下を防止することができる。   Moreover, in the structure which formed the fixing member with the steel pipe, since it is an inexpensive member and can be easily processed according to the shape of the tubular embedded object, the construction cost can be reduced. Moreover, since a steel pipe is accommodated in a ditch | groove after construction and it does not protrude to the flowing water surface side, the fall of a flow-down function can be prevented.

また、鋼管を断面楕円状とした構成にあっては、幅寸法の狭い凹溝内への固定部材の挿入を容易にすると共に、固定部材を凹溝内で加圧・変形させた状態において、シート部材からの反発力を大きくすることができるため、より強い挟持力でシート部材を確実に保持固定することができるので、固定部材を挿入する作業性が向上するばかりでなく、狭持力を向上させる効果も得られる。   In addition, in the configuration in which the steel pipe has an elliptical cross section, while facilitating insertion of the fixing member into the concave groove with a narrow width dimension, in a state where the fixing member is pressed and deformed in the concave groove, Since the repulsive force from the sheet member can be increased, the sheet member can be securely held and fixed with a stronger clamping force, so that not only the workability for inserting the fixing member is improved, but also the holding force is reduced. The effect to improve is also acquired.

また、一対の凹溝を管状埋設物の内面に沿って周状に形成すると共に、シート部材を環帯状に且つ固定部材を線状又は円弧状に形成した構成にあっては、シート部材で管状埋設物の内面を切れ目なく周状に覆う状態で保持固定することができるため、継目部又は脆弱部からの浸水あるいは土砂の流入を確実に防止することができる。   Further, in the configuration in which the pair of concave grooves are formed in a circumferential shape along the inner surface of the tubular embedded object, and the sheet member is formed in an annular shape and the fixing member is formed in a linear shape or an arc shape, the sheet member is tubular. Since the inner surface of the embedded object can be held and fixed in a state of covering the inner surface without a break, it is possible to reliably prevent water from entering from the joint portion or the weak portion or the inflow of earth and sand.

また、シート部材を覆う保護カバーを設けるようにした構成にあっては、シート部材を磨耗や損傷などから保護すると共に、地震動などによって管状埋設物の継目部が開き、土砂あるいは水などの圧力がシート部材に作用した際に、シート部材が圧力により膨らみ管状埋設物の内側に突出することを防止することができる。   In addition, in the configuration in which a protective cover for covering the sheet member is provided, the sheet member is protected from wear and damage, and the joint portion of the tubular embedded object is opened by an earthquake motion, so that pressure such as earth or sand or water is applied. When acting on the sheet member, it is possible to prevent the sheet member from expanding due to pressure and projecting to the inside of the tubular embedded object.

また、保護カバーが、管状埋設物側に固定されてシート部材の両端部をそれぞれ覆う一対の端部カバーと、両端部を除くシート部材の中央部を覆うと共に端部カバーに対してスライド可能に取り付けられた中央カバーとを有して構成されるとした構成にあっては、地震動などによって管状埋設物の継目部が開き、伸張変形したシート部材に土砂あるいは水などの圧力が作用しても、膨らんだシート部材が管状埋設物の内側に突出することを阻止することが可能となるため、流下機能の著しい低下を防止することができる。   In addition, the protective cover is fixed to the tubular embedded object side and covers a pair of end covers that respectively cover both end portions of the sheet member, and covers the center portion of the sheet member excluding both end portions and is slidable with respect to the end cover. In the configuration with the attached central cover, even if the seam portion of the tubular embedded object is opened due to an earthquake motion or the like, and the pressure of earth or sand or water acts on the stretched and deformed sheet member Since it becomes possible to prevent the swollen sheet member from projecting to the inside of the tubular embedded object, it is possible to prevent a significant decrease in the flow-down function.

また、凹溝と対向する位置に、固定部材が凹溝から抜け出るのを防止する脱落防止部材を設けた構成にあっては、固定部材の凹溝からの脱落を防止することにより、シート部材の保持固定状態を維持することができる。   Further, in the configuration in which the fixing member that prevents the fixing member from coming out of the concave groove is provided at a position facing the concave groove, by preventing the fixing member from falling out of the concave groove, The holding and fixing state can be maintained.

また、端部カバーの一部を凹溝に対向させることにより脱落防止部材とした構成にあっては、スライド可能に取り付けられた保護カバーにおける凹溝内からの固定部材の脱落防止を、他の部材を使用することなく簡単な構成で達成できる。   Further, in the configuration in which a part of the end cover is made to face the recessed groove to prevent the falling member, the fixing member is prevented from falling off from the recessed groove in the slidably attached protective cover. This can be achieved with a simple configuration without using any member.

また、第2の発明では、これから敷設する管状埋設物は勿論のこと、既設の管状埋設物に対しても高い水密性を有する耐震継手構造を付与することのできる管状埋設物の製造方法を提供することができる。
しかも円筒状であるか、矩形状、多角形状、あるいは馬蹄状であるか等、管状埋設物の形状を問わず、すべての管状埋設物に応用することが可能である。
In addition, in the second invention, there is provided a method for manufacturing a tubular buried object that can provide an earthquake-resistant joint structure having high water tightness to an existing tubular buried object as well as a tubular buried object to be laid from now on. can do.
In addition, the present invention can be applied to all tubular objects regardless of the shape of the tubular object, such as cylindrical, rectangular, polygonal, or horseshoe-shaped.

また、一対の凹溝をそれぞれ凹設する第1の工程の後に、一対の凹溝の内面に断面コの字形状からなる補強部材を設ける工程を有する構成にあっては、凹設精度の低い凹溝、あるいは強度の低い凹溝であっても、シート部材を確実に固定することができるようになる。   Further, in the configuration having a step of providing a reinforcing member having a U-shaped cross section on the inner surface of the pair of concave grooves after the first step of forming the pair of concave grooves, the accuracy of the concave configuration is low. Even if it is a ditch | groove or a ditch | groove with low intensity | strength, a sheet | seat member can be fixed now reliably.

また、断面中空円形状の固定部材を凹溝内に挿入する第3の工程の後に、固定部材を断面略楕円形状に押し潰す工程を備える構成にあっては、より大きな圧着力でシート部材を保持固定することが可能となるため、容易に固定部材及びシート部材が凹溝から離脱することがない。   Further, in the configuration including the step of crushing the fixing member into a substantially elliptical cross section after the third step of inserting the fixing member having a hollow circular cross section into the concave groove, the sheet member is pressed with a larger crimping force. Since it can be held and fixed, the fixing member and the sheet member are not easily detached from the concave groove.

また、第1乃至第3の工程を管状埋設物の内壁面に対して行う構成にあっては、シート部材等の取り付けを、管路内から行うことができるため、既設の管状埋設物の周囲を掘削する必要がなく、外壁面に取り付ける場合に比較して迅速且つ容易に行うことができる。   Further, in the configuration in which the first to third steps are performed on the inner wall surface of the tubular embedded object, since the sheet member and the like can be attached from the inside of the pipe line, the periphery of the existing tubular embedded object It is not necessary to excavate and can be performed quickly and easily as compared with the case of attaching to the outer wall surface.

本発明の実施の形態における管状埋設物としてボックスカルバートを示す斜視図である。It is a perspective view which shows a box culvert as a tubular buried thing in embodiment of this invention. 図1のII−II線における断面を拡大して示す斜視図である。It is a perspective view which expands and shows the cross section in the II-II line | wire of FIG. 本発明の第1実施例として凹溝部分を拡大して示す断面図である。It is sectional drawing which expands and shows a ditch | groove part as 1st Example of this invention. Aは補強部材の第1実施例を示す凹溝の拡大断面図、Bは補強部材の第2実施例を示す断面図である。A is an enlarged sectional view of a concave groove showing a first embodiment of the reinforcing member, and B is a sectional view showing a second embodiment of the reinforcing member. 本発明の第2実施例として凹溝部分を拡大して示す断面図である。It is sectional drawing which expands and shows a ditch | groove part as 2nd Example of this invention. シート部材の他の実施例の部分断面図を示し、Aは変動前の状態、Bは変動後の状態を示している。The fragmentary sectional view of other examples of a sheet member is shown, A shows the state before change, and B shows the state after change. シート部材の他の実施例を拡大して示す部分断面図である。It is a fragmentary sectional view expanding and showing other examples of a sheet member. 保護カバーを設けた第1実施例として管状埋設物の一部を示す断面図である。It is sectional drawing which shows a part of tubular embedding thing as 1st Example which provided the protective cover. 保護カバーを設けた第2実施例として管状埋設物の一部を示す断面図である。It is sectional drawing which shows a part of tubular embedding thing as 2nd Example which provided the protective cover. 保護カバーを設けた第3実施例として管状埋設物の一部を示す断面図である。It is sectional drawing which shows a part of tubular embedding thing as 3rd Example which provided the protective cover. 第3実施例の保護カバーの一部構成を示す斜視図である。It is a perspective view which shows a partial structure of the protective cover of 3rd Example. 第3実施例の保護カバーを管状埋設物としてのボックスカルバートに設けた実施例を示す断面図である。It is sectional drawing which shows the Example which provided the protective cover of 3rd Example in the box culvert as a tubular embedment. 保護カバーを設けた第4実施例として管状埋設物の一部を示す断面図である。It is sectional drawing which shows a part of tubular embedding thing as 4th Example which provided the protective cover.

以下、本発明の実施の形態について図面を参照しつつ説明する。
図1は本発明の実施の形態として管状埋設物及びその製造方法を示す斜視図、図2は図1のII−II線における断面を拡大して示す斜視図、図3は本発明の第1実施例として凹溝部分を拡大して示す断面図、図4Aは補強部材の第1実施例を示す凹溝の拡大断面図、Bは補強部材の第2実施例を示す断面図、図5は本発明の第2実施例として凹溝部分を拡大して示す断面図、図6はシート部材の他の実施例の部分断面図を示し、Aは変動前の状態、Bは変動後の状態を示している。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a tubular buried object and a manufacturing method thereof as an embodiment of the present invention, FIG. 2 is a perspective view showing an enlarged cross section taken along line II-II in FIG. 1, and FIG. FIG. 4A is an enlarged cross-sectional view of a concave groove showing a first embodiment of the reinforcing member, FIG. 4B is a cross-sectional view showing a second embodiment of the reinforcing member, and FIG. Sectional drawing which expands and shows a ditch | groove part as 2nd Example of this invention, FIG. 6 shows the fragmentary sectional view of the other Example of a sheet | seat member, A is a state before a fluctuation | variation, B is a state after a fluctuation | variation. Show.

本発明の管状埋設物1としては、例えば図1に示すような矩形形状からなるコンクリート製のボックスカルバート2である。ボックスカルバート2は、上壁面2a,下壁面2b,左壁面2c及び右壁面2dからなる4つの内壁面と、これらの4つの内壁面が隣接する角部に傾斜面2e,2e,2e及び2eを有して構成されている。一方の開口端である先端部2Aと他方の開口端である後端部2Bとの間がボックスカルバート2の長さ方向である。このようなボックスカルバート2は、長さ方向の前段に設けられたボックスカルバート2の後端部2Bに、その後段に設けられたボックスカルバート2の先端部2Aを連設させた状態で地中に埋設される。   The tubular buried object 1 of the present invention is a concrete box culvert 2 having a rectangular shape as shown in FIG. The box culvert 2 has four inner wall surfaces composed of an upper wall surface 2a, a lower wall surface 2b, a left wall surface 2c and a right wall surface 2d, and inclined surfaces 2e, 2e, 2e and 2e at corners where these four inner wall surfaces are adjacent to each other. It is configured. The length direction of the box culvert 2 is between the front end portion 2A which is one open end and the rear end portion 2B which is the other open end. Such a box culvert 2 is formed in the ground in a state in which the rear end 2B of the box culvert 2 provided at the front stage in the length direction is connected to the front end 2A of the box culvert 2 provided at the rear stage. Buried.

ここで、埋設後の地震動や地盤の不等沈下などにより、ボックスカルバート2の下壁面2b上に、例えば図1,2に示すようなひび割れを誘導する脆弱部3にひび割れが発生した場合を想定し、この場合の耐震性及び水密性を向上させる管状埋設物の製造方法について説明する。   Here, it is assumed that cracks have occurred on the weak wall 3 that induces cracks on the lower wall surface 2b of the box culvert 2, for example, due to seismic motion after burial or uneven settlement of the ground. And the manufacturing method of the tubular buried object which improves the earthquake resistance and water tightness in this case is demonstrated.

第1の工程では、ボックスカルバート2の内壁面、すなわち脆弱部3が形成された下壁面2bで、且つ脆弱部3の端からボックスカルバート2の長さ方向ほぼ等距離の両側の位置に、幅寸法20mm,深さ寸法30mm程度の一対の凹溝4(凹溝4a及び凹溝4b)を平均距離L1で凹設する。このような一対の凹溝4(凹溝4a及び凹溝4b)は、その他の内壁面、すなわち上壁面2a,左壁面2c、右壁面2d及びこれらの間の4つの傾斜面2eの内壁面にも平均距離L1を維持しながら互いに平行な状態で連続的に周設する。   In the first step, the inner wall surface of the box culvert 2, that is, the lower wall surface 2 b on which the weakened portion 3 is formed, and the width of the box culvert 2 at positions on both sides that are approximately equidistant from the end of the weakened portion 3 in the length direction. A pair of concave grooves 4 (concave groove 4a and concave groove 4b) having a dimension of about 20 mm and a depth of about 30 mm are recessed at an average distance L1. The pair of concave grooves 4 (the concave grooves 4a and the concave grooves 4b) are formed on the other inner wall surfaces, that is, the inner wall surfaces of the upper wall surface 2a, the left wall surface 2c, the right wall surface 2d, and the four inclined surfaces 2e therebetween. Are continuously provided in parallel with each other while maintaining the average distance L1.

第2の工程では、環帯状のシート部材6を、ボックスカルバート2の内部から脆弱部3及びその両端の一対の凹溝(凹溝4a及び凹溝4b)を覆うように設置する。環帯状のシート部材6は、一方の凹溝4aと他方の凹溝4bとの間の平均距離L1より若干広い幅寸法W1とする方が、余裕を持って固定することができる点で好ましい。なお、シート部材6は、可撓性及び防水性を有すると共に、引張り強さが強く伸縮性を有するゴムなどが好ましい。   In the second step, the ring-shaped sheet member 6 is installed from the inside of the box culvert 2 so as to cover the fragile portion 3 and the pair of concave grooves (the concave groove 4a and the concave groove 4b) at both ends thereof. It is preferable that the ring-shaped sheet member 6 has a width W1 that is slightly wider than the average distance L1 between the one concave groove 4a and the other concave groove 4b in that it can be fixed with a margin. In addition, the sheet member 6 is preferably made of rubber having flexibility and waterproofness, strong tensile strength, and stretchability.

第3の工程では、丸鋼8a又は鋼管8bからなる固定部材8をシート部材6の表面側から一方の凹溝4a内に共に挟み込まれるようにしながら挿入(狭入)することにより、シート部材6の幅方向の一端を一方の凹溝4a内に保持固定する。同様に、他の固定部材8をシート部材6の表面側から他方の凹溝4b内に狭入することにより、シート部材6の幅方向の他端を他方の凹溝4b内に保持固定する(図3参照)。   In the third step, the sheet member 6 is inserted (narrowed) while the fixing member 8 made of the round steel 8a or the steel pipe 8b is inserted into the concave groove 4a from the surface side of the sheet member 6 together. One end in the width direction is held and fixed in one concave groove 4a. Similarly, the other fixing member 8 is narrowly inserted into the other concave groove 4b from the surface side of the sheet member 6, whereby the other end in the width direction of the sheet member 6 is held and fixed in the other concave groove 4b ( (See FIG. 3).

なお、固定部材8の外形寸法φの寸法の範囲は、シート部材6の板厚寸法をt、凹溝4の幅寸法をW2としたときに、W2−2×tよりも大きく、幅寸法W2よりも小さい範囲(W2>φ>W2−2×t)で適宜決定することができる。これにより、強力な圧着力でシート部材6を、凹溝4の両側方向から保持固定することが可能となる。   The range of the outer dimension φ of the fixing member 8 is larger than W2-2 × t, where the thickness of the sheet member 6 is t and the width of the groove 4 is W2, and the width W2. Can be appropriately determined within a smaller range (W2> φ> W2-2 × t). Thereby, it becomes possible to hold and fix the sheet member 6 from both sides of the groove 4 with a strong pressure bonding force.

また、固定部材8の外形寸法φは、凹溝4の深さ寸法をHとしたときに、H−t以下であることが好ましい(φ≦H−t)。この範囲に設定することにより、固定部材8が完全に凹溝4内に収納され、流水面側に突出されることがなくなるため、管状埋設物1内における流下機能の低下を防止することが可能となる。   Further, the outer dimension φ of the fixing member 8 is preferably equal to or less than H−t (φ ≦ H−t), where H is the depth dimension of the concave groove 4. By setting within this range, the fixing member 8 is completely accommodated in the concave groove 4 and does not protrude toward the water surface, so that it is possible to prevent the flow-down function in the tubular buried object 1 from being lowered. It becomes.

図3に示すように、丸鋼8aからなる固定部材8をシート部材6と共に凹溝4内に狭入すると、凹溝4内で、シート部材6が主として幅方向の加圧力を受けて圧縮変形させられるため、シート部材6を強固に保持固定することが可能である。このような工程で製造されたボックスカルバート2は、ひび割れを誘導する脆弱部3に発生するひび割れに対して、優れた耐震性及び水密性を有した管状埋設物1となる。   As shown in FIG. 3, when the fixing member 8 made of round steel 8 a is inserted into the groove 4 together with the sheet member 6, the sheet member 6 is compressed and deformed in the groove 4 mainly under pressure in the width direction. Therefore, the sheet member 6 can be firmly held and fixed. The box culvert 2 manufactured by such a process becomes a tubular embedded 1 having excellent earthquake resistance and water tightness against cracks generated in the weakened portion 3 that induces cracks.

固定部材8を構成する丸鋼8aとしては、シート部材6同様にリング状である必要はなく、作業性を考慮して適宜分割したものを用いることができる。個々の固定部材8の長さ寸法の和は、上壁面2a,下壁面2b,左壁面2c及び右壁面2dからなる4つの内壁面と、これらの内壁面が隣接する角部の傾斜面2eからなる、ボックスカルバート2の内周面の長さ寸法と同じか、それよりも若干長い寸法であればよい。複数の固定部材8を用いることにより、各壁面又は傾斜面2eごとに強固に固定することができると共に、固定部材8を複数に分割することで、リング状に比べて狭入時の作業効率を高めることができる。   The round steel 8a constituting the fixing member 8 does not need to be ring-shaped like the sheet member 6, and can be appropriately divided in consideration of workability. The sum of the lengths of the individual fixing members 8 is obtained from four inner wall surfaces composed of the upper wall surface 2a, the lower wall surface 2b, the left wall surface 2c, and the right wall surface 2d, and the inclined surface 2e at the corner where these inner wall surfaces are adjacent to each other. Thus, the length may be the same as or slightly longer than the length of the inner peripheral surface of the box culvert 2. By using a plurality of fixing members 8, each wall surface or inclined surface 2 e can be firmly fixed, and by dividing the fixing member 8 into a plurality of parts, the working efficiency at the time of narrow insertion can be improved as compared with a ring shape. Can be increased.

なお、管状埋設物1の形状が円筒状である場合には、任意の長さ寸法からなる円弧状の固定部材8を用いることにより、上記同様の効果が期待できる。   In addition, when the shape of the tubular embedment 1 is cylindrical, the same effect as described above can be expected by using the arc-shaped fixing member 8 having an arbitrary length dimension.

また、図4Aに示すように、第2の工程の後に、一対の凹溝4内に、断面コの字形状からなる補強部材9をそれぞれ設ける工程を導入してもよい。補強部材9としては金属製、例えば強度的に強く、防錆作用も備えるステンレスなどが好適である。また、シート部材6を凹溝4内に狭入する際に、補強部材9あるいは凹溝4の角部分によるシート部材6の損傷を防止するために、補強部材9を図4Bに示すように上端部9aを側方に延長した延出部9b,9bを形成すると共に、上端部9aと延出部9bとの角に湾曲形状からなるR部9cを設けた断面形状としてもよい。なお、延出部9b,9bはボックスカルバート2の一つの壁面である下壁面2b内に埋設してもよいし、下壁面2b上に露出するように設けてもよい。   Further, as shown in FIG. 4A, a step of providing reinforcing members 9 each having a U-shaped cross section in the pair of concave grooves 4 may be introduced after the second step. The reinforcing member 9 is preferably made of metal, for example, stainless steel that is strong in strength and also has a rust preventive action. Further, when the sheet member 6 is narrowly inserted into the concave groove 4, the reinforcing member 9 is prevented from being damaged by the reinforcing member 9 or the corner portion of the concave groove 4 as shown in FIG. 4B. It is good also as cross-sectional shape which provided the extended part 9b and 9b which extended the part 9a to the side, and provided the R part 9c which made the curved shape in the corner | angular of the upper end part 9a and the extended part 9b. The extending portions 9b, 9b may be embedded in the lower wall surface 2b, which is one wall surface of the box culvert 2, or may be provided so as to be exposed on the lower wall surface 2b.

凹溝4に断面コの字形状の補強部材9を設けることにより、例えば凹設後の凹溝4に、曲がり、幅の不均一、あるいは角部が欠けるなどの不具合が発生しても、凹溝4の寸法精度を高度に維持することが可能である。このため、凹溝4と固定部材8との間に設けられた可撓性のシート部材6に作用する加圧力を、凹溝4の全周に亘って均一化することができる。このため、シート部材6及び固定部材8の脱落を防止することができると共に、より確実な水密性を確保することが可能となる。   By providing the U-shaped reinforcing member 9 in the concave groove 4, for example, even if a defect such as bending, non-uniform width, or lack of corners occurs in the concave groove 4 after being provided with a concave, The dimensional accuracy of the groove 4 can be maintained at a high level. For this reason, the applied pressure acting on the flexible sheet member 6 provided between the concave groove 4 and the fixing member 8 can be made uniform over the entire circumference of the concave groove 4. For this reason, it is possible to prevent the sheet member 6 and the fixing member 8 from falling off, and to ensure more reliable watertightness.

また、断面コの字形状からなる補強部材9を図4Aに示すように、上端部9aの幅寸法W3を底部9dの幅寸法W4よりも狭めた形状とすることで、狭入後の固定部材8が凹溝4からより抜け出し難くすることが可能となり、シート部材6の脱落防止をより確実にすることができる。   Further, as shown in FIG. 4A, the reinforcing member 9 having a U-shaped cross section has a shape in which the width dimension W3 of the upper end portion 9a is narrower than the width dimension W4 of the bottom portion 9d. It becomes possible to make it difficult for the 8 to come out of the concave groove 4, and to prevent the sheet member 6 from falling off.

固定部材8として鋼管8bを用いる場合には、図5に示すように、固定部材8をシート部材6と共に凹溝4内に狭入する第3の工程の後に、断面中空円形状の固定部材8を油圧ジャッキ等で加圧して凹溝幅方向へ押し潰して略楕円状に変形させてもよい。この工程を行うと、シート部材6の圧縮変形を凹溝幅方向に増大させることが可能となり、シート部材6を更に強固に保持固定することが可能な管状埋設物1とすることができる。   When a steel pipe 8b is used as the fixing member 8, as shown in FIG. 5, the fixing member 8 having a hollow circular cross section is formed after the third step of narrowing the fixing member 8 together with the sheet member 6 into the concave groove 4. May be pressed by a hydraulic jack or the like and crushed in the width direction of the groove to be deformed into a substantially elliptical shape. When this step is performed, the compressive deformation of the sheet member 6 can be increased in the groove width direction, and the tubular embedded object 1 that can hold and fix the sheet member 6 more firmly can be obtained.

なお、あらかじめ断面略楕円状の鋼管8bからなる固定部材8を用意し、シート部材6と共に一対の凹溝4内にそれぞれ狭入してもよい。この場合、固定部材8の長軸を下壁面2bに対して垂直に向く状態で狭入することになるので、固定部材8の凹溝4内への挿入が容易となる。また、狭入後に固定部材8を凹溝4内でジャッキ等により加圧して、長軸が下壁面2bに対して略平行に向くように変形させることで、上記同様にシート部材6を更に強固に保持固定することが可能となる。   A fixing member 8 made of a steel pipe 8b having a substantially elliptical cross section may be prepared in advance, and may be narrowly inserted into the pair of concave grooves 4 together with the sheet member 6. In this case, since the long axis of the fixing member 8 is narrowly inserted in a state of being perpendicular to the lower wall surface 2b, the insertion of the fixing member 8 into the concave groove 4 is facilitated. Further, the sheet member 6 is further strengthened in the same manner as described above by pressing the fixing member 8 with a jack or the like in the concave groove 4 after the narrow insertion and deforming the long axis to be substantially parallel to the lower wall surface 2b. It becomes possible to hold and fix to.

前段に連設されたボックスカルバート2の後端部2Bとその後段に設けられたボックスカルバート2の先端部2Aとの継目部については、上述の脆弱部3を継目部とみなし、上記同様、第1の工程として前段側のボックスカルバート2の後端部2Bに一方の凹溝4aを、後段側のボックスカルバート2の先端部2Aに他方の凹溝4bをそれぞれ凹設することにより、継目部において高い水密性及び耐震性を備える管状埋設物1とすることができる。   Regarding the joint portion between the rear end portion 2B of the box culvert 2 provided at the front stage and the front end portion 2A of the box culvert 2 provided at the rear stage, the above-described weakened portion 3 is regarded as a joint portion, As one step, one groove 4a is formed in the rear end 2B of the front box culvert 2 and the other groove 4b is formed in the front end 2A of the box culvert 2 on the rear stage. It can be set as the tubular buried object 1 provided with high watertightness and earthquake resistance.

このような製造工程による管状埋設物1の製造は、ボックスカルバート2の先端部2Aと後端部2Bにあらかじめ一対の凹溝4(4a,4b)を設けて製作することで、管状埋設物1の耐震化を埋設時に行うこともできるし、既に埋設され使用されている管状埋設物1に行うことも可能である。   The manufacturing of the tubular embedded object 1 by such a manufacturing process is performed by providing a pair of concave grooves 4 (4a, 4b) in advance at the front end portion 2A and the rear end portion 2B of the box culvert 2, so that the tubular embedded object 1 is manufactured. The seismic resistance can be performed at the time of embedment, or can be performed on a tubular embedment 1 that is already embedded and used.

また、地震時の地震動や地盤の不等沈下において、継目部の水密性に対する信頼性を向上させるためには、想定される変動量に対してある程度の余裕が生まれるように、より幅寸法W1の広いシート部材6を用いることが好ましいが、コスト、あるいは施工性の面からの制約等により、幅の広いシート部材6を使用するには限界がある。   In addition, in order to improve the reliability of the water tightness of the seam part in the ground motion and the uneven settlement of the ground at the time of the earthquake, the width dimension W1 is further increased so that a certain margin is created for the assumed fluctuation amount. Although it is preferable to use a wide sheet member 6, there is a limit to using a wide sheet member 6 due to cost or workability restrictions.

そこで、例えば図6A,Bに示すような、シート部材6が蛇腹状の伸縮部6Aを備える構成とすることで対応することが可能となる。図6A,Bに示すように、伸縮部6Aはシート部材6の両端を除く全体を蛇腹状の伸縮部6Aとした構成であってもよいし、中間部分の一部を蛇腹状に形成した構成であってもよい。   Therefore, for example, as shown in FIGS. 6A and 6B, the sheet member 6 can be accommodated by including a bellows-like stretchable portion 6A. As shown in FIGS. 6A and 6B, the expansion / contraction part 6A may have a configuration in which the entirety of the sheet member 6 excluding both ends is an accordion-type expansion / contraction part 6A, or a configuration in which a part of the intermediate part is formed in an accordion shape. It may be.

図6Aに示すように、地震動や不等沈下が起きる変動前の段階、すなわち前段のボックスカルバート2の後端部2Bとその後段のボックスカルバート2の先端部2Aとが連結されて継目部Jが形成された状態では伸縮部6Aは収縮状態にある。そして、図6Bに示すように、地震動や不等沈下が発生し、例えば前段のボックスカルバート2の後端部2Bとその後段のボックスカルバート2の先端部2Aとの間が軸方向に沿って離れ、この間に隙間Sが発生すると、伸縮部6Aがシート部材6の伸縮方向に大きく伸長することにより、隙間Sが形成された後も水密性を維持することが可能となる。   As shown in FIG. 6A, the stage before the change in which the seismic motion and unequal subsidence occur, that is, the rear end 2B of the preceding box culvert 2 and the front end 2A of the subsequent box culvert 2 are connected to form the joint J. In the formed state, the stretchable portion 6A is in a contracted state. Then, as shown in FIG. 6B, seismic motion or uneven settlement occurs, and for example, the rear end portion 2B of the preceding box culvert 2 and the front end portion 2A of the subsequent box culvert 2 are separated along the axial direction. When the gap S is generated in the meantime, the expansion / contraction part 6 </ b> A greatly extends in the expansion / contraction direction of the sheet member 6, so that the watertightness can be maintained even after the gap S is formed.

なお、このような伸縮部6Aによる効果は、前後するボックスカルバート2の長さ方向(シート部材6の伸縮方向)に位置ずれした場合だけでなく、これと略直交する剪断方向(径方向ともいう)に位置ずれした場合も同様に有効である。   In addition, the effect by such an expansion / contraction part 6A is not only the case where the position shifts in the length direction of the box culvert 2 that moves forward and backward (the expansion / contraction direction of the sheet member 6), but also the shear direction (also referred to as the radial direction) that is substantially orthogonal thereto. This is also effective when the position is shifted to ().

次に、シート部材の他の実施例について説明する。
図7はシート部材の他の実施例を拡大して示す部分断面図である。なお、図7ではシート部材の幅方向の一端のみを示しているが、他方の端部も同様の構成である。
図7に示すシート部材6が、上述のシート部材6と異なる点は、シート部材6の幅方向の両端に断面U字形状からなる挟持部6Bを形成した点にある。
Next, another embodiment of the sheet member will be described.
FIG. 7 is an enlarged partial sectional view showing another embodiment of the sheet member. In FIG. 7, only one end of the sheet member in the width direction is shown, but the other end has the same configuration.
The sheet member 6 shown in FIG. 7 is different from the above-described sheet member 6 in that sandwiching portions 6B each having a U-shaped cross section are formed at both ends of the sheet member 6 in the width direction.

挟持部6Bの外幅寸法Waは、凹溝4の幅寸法W2とほぼ同寸法で形成されている。また挟持部6B内の内壁6a,6a間の内幅寸法Wbは固定部材8の外形寸法φよりも狭い幅寸法で形成されている(φ>Wb)。このような挟持部6Bは、例えば図6に示すように伸縮部6Aの幅方向の両端にそれぞれ設けられる。
なお、この場合にも上述の断面コの字形状の補強部材9を凹溝4内に設置してもよく、この場合には補強部材9の両壁間の幅寸法がW2に設定される。
The outer width dimension Wa of the sandwiching portion 6B is formed to be substantially the same as the width dimension W2 of the concave groove 4. Further, the inner width dimension Wb between the inner walls 6a, 6a in the sandwiching portion 6B is formed to be narrower than the outer dimension dimension φ of the fixing member 8 (φ> Wb). For example, as shown in FIG. 6, such sandwiching portions 6 </ b> B are provided at both ends in the width direction of the stretchable portion 6 </ b> A.
In this case, the U-shaped reinforcing member 9 having a U-shaped cross section may be installed in the recessed groove 4, and in this case, the width dimension between both walls of the reinforcing member 9 is set to W2.

この実施例では、施工時において、挟持部6Bを凹溝4内に容易に挿入することができ、シート部材6が脱落しない程度に仮固定できるため、施工性が向上する。すなわち、管状埋設物1を短時間で製造することができる。また、シート部材6を固定部材8により、設置・固定した際に、シート部材6の両端部にはみ出しがないため、流下機能を阻害することがない。そして、挟持部6B内の内幅寸法Wbよりも広い外形寸法φからなる固定部材8を凹溝4内に狭入することにより、両幅方向からの強力な加圧力を発生させてシート部材6を強固に固定することが可能である。これにより、高い水密性及び耐震性を有する管状埋設物1とすることができる。   In this embodiment, at the time of construction, the clamping portion 6B can be easily inserted into the groove 4 and can be temporarily fixed to the extent that the sheet member 6 does not fall off, so that the workability is improved. That is, the tubular embedded object 1 can be manufactured in a short time. Further, when the sheet member 6 is installed and fixed by the fixing member 8, there is no protrusion at both ends of the sheet member 6, so that the flow-down function is not hindered. Then, the fixing member 8 having an outer dimension φ larger than the inner width dimension Wb in the sandwiching portion 6B is narrowly inserted into the groove 4 to generate a strong pressing force from both width directions, thereby generating the sheet member 6. Can be firmly fixed. Thereby, it can be set as the tubular buried object 1 which has high water-tightness and earthquake resistance.

さらに、シート部材6を磨耗や損傷から保護するため、以下に示すような保護カバー10を管状埋設物1の内壁面に取り付ける構成とすることが望ましい。
図8は保護カバーを設けた第1実施例として管状埋設物の一部を示す断面図、図9は保護カバーを設けた第2実施例として管状埋設物の一部を示す断面図、図10は保護カバーを設けた第3実施例として管状埋設物の一部を示す断面図、図11は第3実施例の保護カバーの一部構成を示す斜視図、図12は第3実施例の保護カバーを管状埋設物としてのボックスカルバートに設けた実施例を示す断面図、図13は実施例4として管状埋設物の一部を示す断面図である。なお、図8、図10及び図13は管状埋設物間に継目部が形成された例を、図9は管状埋設物の壁面にひび割れを誘導する脆弱部が形成された例を示している。
Furthermore, in order to protect the sheet member 6 from abrasion and damage, it is desirable that a protective cover 10 as described below is attached to the inner wall surface of the tubular embedded object 1.
FIG. 8 is a sectional view showing a part of a tubular embedded object as a first embodiment provided with a protective cover, FIG. 9 is a sectional view showing a part of a tubular embedded object as a second embodiment provided with a protective cover, and FIG. FIG. 11 is a cross-sectional view showing a part of a tubular embedded object as a third embodiment provided with a protective cover, FIG. 11 is a perspective view showing a partial configuration of the protective cover of the third embodiment, and FIG. 12 is a protection of the third embodiment. FIG. 13 is a cross-sectional view showing a part of a tubular embedded object as Example 4, in which a cover is provided in a box culvert as a tubular embedded object. 8, FIG. 10 and FIG. 13 show an example in which a seam portion is formed between tubular embedded objects, and FIG. 9 shows an example in which a weak portion for inducing cracks is formed on the wall surface of the tubular embedded object.

図8乃至図11に示す保護カバー10は、シート部材6を磨耗や損傷などから保護すると共に、地震動などによって管状埋設物の継目部が開き土砂あるいは水などの圧力がシート部材6に作用した際に、シート部材6が圧力により膨らみ、管状埋設物の内側に突出することを防止するためのものである。   The protective cover 10 shown in FIGS. 8 to 11 protects the sheet member 6 from abrasion, damage, and the like, and when the seam portion of the tubular embedded object opens due to earthquake motion or the like, and pressure such as earth or sand acts on the sheet member 6. In addition, the sheet member 6 is prevented from expanding due to pressure and protruding to the inside of the tubular embedded object.

図8及び図9の第1実施例及び第2実施例では、保護カバー10が主としてシート部材6の伸縮方向の両端部を覆う一対の端部カバー11,11と、シート部材6の中央を覆う中央カバー12とで構成される。   In the first and second embodiments of FIGS. 8 and 9, the protective cover 10 mainly covers a pair of end covers 11 and 11 that cover both ends of the sheet member 6 in the expansion and contraction direction, and the center of the sheet member 6. It is comprised with the center cover 12. FIG.

図8に示す第1実施例では、一対の端部カバー11,11が継目部Jを挟んでその両側の位置に設けられている。一方の端部カバー11は、一方の管状埋設物1の内壁である下壁面2bに、シート部材6の一方の端部を覆う状態で固定され、同様に他方の端部カバー11は、他方の管状埋設物1の内壁である下壁面2bに、シート部材6の他方の端部を覆う状態で固定されている。   In the first embodiment shown in FIG. 8, a pair of end covers 11, 11 are provided on both sides of the joint portion J. One end cover 11 is fixed to the lower wall surface 2b, which is the inner wall of one tubular embedded object 1, in a state of covering one end of the sheet member 6, and similarly, the other end cover 11 It is being fixed to the lower wall surface 2b which is an inner wall of the tubular buried thing 1 in the state which covers the other edge part of the sheet | seat member 6. FIG.

端部カバー11は、基部11aとこの基部11aから断面クランク状(または段差状)に形成されて継目部Jに向かって延びるカバー部11bとを有して構成されている。基部11aは管状埋設物1の内壁面である下壁面2bに固定ボルト16を介して取り付けられ、カバー部11bがシート部材6の一方の端部を覆っている。基部11aの段差部分は、凹溝4に対向配置されており、凹溝4から鋼管8bなどの固定部材8が抜け出てしまうことを防止する脱落防止部材15として機能している。またカバー部11bの下面には、内壁面である下壁面2b側に突出するガイド突起13がそれぞれ形成されている。ガイド突起13は、少なくともカバー部11bの前後方向(紙面と直交する方向)の両端に設けられている。   The end cover 11 includes a base portion 11a and a cover portion 11b that is formed in a cross-sectional crank shape (or step shape) from the base portion 11a and extends toward the joint portion J. The base portion 11 a is attached to the lower wall surface 2 b which is the inner wall surface of the tubular embedded object 1 via a fixing bolt 16, and the cover portion 11 b covers one end portion of the sheet member 6. The step portion of the base portion 11a is disposed so as to face the concave groove 4, and functions as a dropout prevention member 15 that prevents the fixing member 8 such as the steel pipe 8b from coming out of the concave groove 4. Moreover, the guide protrusion 13 which protrudes in the lower surface 2b side which is an inner wall surface is formed in the lower surface of the cover part 11b, respectively. The guide protrusions 13 are provided at least at both ends of the cover portion 11b in the front-rear direction (direction orthogonal to the paper surface).

他方、第1実施例に示す中央カバー12は平板状の部材であり、その前後方向の両端にはシート部材6が伸縮する方向を長手方向とするガイド長孔14が穿設されており、ガイド突起13がこのガイド長孔14に挿入されている。なお、このようなガイド長孔14は、ガイド突起13と対向する位置、すなわち少なくとも長手方向と直交する前後方向(紙面と直交する方向)の両端にそれぞれ設けられている。   On the other hand, the central cover 12 shown in the first embodiment is a flat plate member, and at both ends in the front-rear direction, guide long holes 14 whose longitudinal direction is the direction in which the sheet member 6 expands and contracts are formed. A protrusion 13 is inserted into the guide slot 14. Note that such guide long holes 14 are provided at positions facing the guide protrusions 13, that is, at both ends in at least the front-rear direction (direction orthogonal to the paper surface) orthogonal to the longitudinal direction.

中央カバー12は一対の端部カバー11の各カバー部11b,11bとシート部材6との間に配置されており、両端の端部カバー11,11は、ガイド突起13とガイド長孔14からなる案内機構によって案内されることにより、中央カバー12に対して長手方向(シート部材6の伸縮方向)に沿って相対的にスライド移動可能な状態にある。   The central cover 12 is disposed between the cover portions 11 b and 11 b of the pair of end covers 11 and the sheet member 6, and the end covers 11 and 11 at both ends include guide protrusions 13 and guide long holes 14. By being guided by the guide mechanism, it is in a state in which it can slide relative to the central cover 12 along the longitudinal direction (the direction in which the sheet member 6 extends and contracts).

図9に示す第2実施例は、中央カバー12を一対の端部カバー11の各カバー部11b,11bの上側(ボックスカルバート2の内部中心側)に設けるようにした構成である点、ガイド突起13を中央カバー12側に設け且つガイド長孔14を端部カバー11側に設けた点などにおいて上記第1実施例と相違するが、全体的な基本構成は図8の第1実施例と同様である。   The second embodiment shown in FIG. 9 is configured such that the center cover 12 is provided on the upper side of the cover portions 11b, 11b of the pair of end cover 11 (inside the inner center of the box culvert 2), the guide protrusion. 13 differs from the first embodiment in that 13 is provided on the center cover 12 side and the guide slot 14 is provided on the end cover 11 side, but the overall basic configuration is the same as that of the first embodiment of FIG. It is.

図8及び図9に示す第1実施例及び第2実施例では、地震動などによって隣接する管状埋設物1間の継目部Jが開くことにより、またはひび割れを誘導する脆弱部3にひび割れが発生することにより、継目部J又は脆弱部3に隙間が形成されることにより、シート部材6が伸長させられる。同時に、ガイド突起13がガイド長孔14内を移動するため、シート部材6の伸長に追従して一方の端部カバー11と他方の端部カバー11との対向間隔が広がる。   In the first and second embodiments shown in FIG. 8 and FIG. 9, a crack is generated in the fragile portion 3 that induces cracks by opening the joint portion J between adjacent tubular embedded objects 1 due to seismic motion or the like. Thereby, the sheet | seat member 6 is extended by forming a clearance gap in the joint part J or the weak part 3. FIG. At the same time, since the guide protrusion 13 moves in the guide long hole 14, the opposing distance between the one end cover 11 and the other end cover 11 is increased following the extension of the sheet member 6.

よって、土砂あるいは水などの圧力が、上記隙間を介してシート部材6に直接作用した場合でも、シート部材6が管状埋設物1の内側に大きく突出することを防止することができる。よって、流下機能の低下を小さくできる。
なお、ガイド突起13とガイド長孔14は、一方が端部カバー11側のカバー部11bに設けられ、他方が中央カバー12に設けられる構成であればよい。
Therefore, even when pressure such as earth or sand or water directly acts on the sheet member 6 through the gap, it is possible to prevent the sheet member 6 from projecting greatly inside the tubular embedded object 1. Therefore, the deterioration of the flow function can be reduced.
The guide protrusion 13 and the guide slot 14 may be configured such that one is provided in the cover portion 11b on the end cover 11 side and the other is provided in the center cover 12.

図10乃至図13に示すように、第3及び第4実施例に示す保護カバー10は平板状の金属板(例えばステンレス)から形成された第1部材10Aと第2部材10Bとを複数枚組み合わせることにより構成される。第1部材10A及び第2部材10Bは、平板部10aの幅方向(伸縮方向と同方向)の両端を鈍角状に折り曲げて形成したテーパ部10b,10bを備えた部材である。特に、第2部材10Bは平板部10aの長手方向の2箇所の位置で鈍角(図11では略135度)に折り曲げることにより、長手方向両側の平板部10aと平板部10aとが互いに直交するように形成された部材である。   As shown in FIGS. 10 to 13, the protective cover 10 shown in the third and fourth embodiments is a combination of a plurality of first members 10 </ b> A and second members 10 </ b> B formed of a flat metal plate (for example, stainless steel). It is constituted by. The first member 10A and the second member 10B are members provided with tapered portions 10b and 10b formed by bending both ends of the flat plate portion 10a in the width direction (the same direction as the expansion and contraction direction) into obtuse angles. In particular, the second member 10B is bent at an obtuse angle (approximately 135 degrees in FIG. 11) at two positions in the longitudinal direction of the flat plate portion 10a so that the flat plate portions 10a and 10a on both sides in the longitudinal direction are orthogonal to each other. It is the member formed in.

図12に示すように、第1部材10Aが上壁面2a,下壁面2b,左壁面2c及び右壁面2dからなる4つの内壁面に対向配置され、第2部材10Bがこれらの4つの内壁面と隣接する角部である4つの傾斜面2eに対向して設けられることにより、保護カバー10は管状埋設物1の内壁面に沿って周状に設置される。
このように設置された保護カバー10は、例えば図13に示すように保護カバー10の長手方向の両端を押さえ付ける機能を備えた保持部材17と固定ボルト18とによって取り付けることができる。なお、このような保持部材17は、周方向に並ぶ保護カバー10の両端に沿って周状に取り付けてもよいし、あるいは保護カバー10の両端の任意の位置に、周方向に間隔を置いて複数取り付けるようにしてもよい。
As shown in FIG. 12, the first member 10A is disposed opposite to four inner wall surfaces composed of an upper wall surface 2a, a lower wall surface 2b, a left wall surface 2c, and a right wall surface 2d, and the second member 10B is connected to these four inner wall surfaces. The protective cover 10 is circumferentially installed along the inner wall surface of the tubular embedded object 1 by being provided to face the four inclined surfaces 2e that are adjacent corner portions.
For example, as shown in FIG. 13, the protective cover 10 installed in this way can be attached by a holding member 17 and a fixing bolt 18 having a function of pressing both ends in the longitudinal direction of the protective cover 10. Such holding members 17 may be attached circumferentially along both ends of the protective cover 10 aligned in the circumferential direction, or at an arbitrary position on both ends of the protective cover 10 with an interval in the circumferential direction. A plurality may be attached.

図10及び図13に示すように、第3及び第4実施例においてもシート部材6が保護カバー10によって覆われるため、シート部材6が流水面に突出することがない。また第1部材10A及び第2部材10Bのテーパ部10b,10bが流水の上流側及び下流側に配置されるようになるため、流下機能の低下を抑えることが可能である。   As shown in FIGS. 10 and 13, since the sheet member 6 is covered with the protective cover 10 in the third and fourth embodiments, the sheet member 6 does not protrude from the water surface. Moreover, since the taper portions 10b and 10b of the first member 10A and the second member 10B are arranged on the upstream side and the downstream side of the flowing water, it is possible to suppress a decrease in the flowing-down function.

なお、第3及び第4実施例に示す保護カバー10は、ボックスカルバート2の下壁面2bなど平面に限って使用されるものではなく、第2部材10Bを内壁面に倣う形状で形成することにより、例えば円筒状や馬蹄形状の内壁面を有する管状埋設物1に使用することも可能である。   The protective cover 10 shown in the third and fourth embodiments is not limited to a flat surface such as the lower wall surface 2b of the box culvert 2, and is formed by forming the second member 10B in a shape that follows the inner wall surface. For example, it can also be used for the tubular embedded object 1 having a cylindrical or horseshoe-shaped inner wall surface.

また、図9に示すように、第3実施例においても、シート部材6の脱落をより確実に防止するために、凹溝4と対向する位置に脱落防止部材15及びこれを固定する固定ボルト16を設けた構成とすることが好ましい。なお、脱落防止部材15は、管状埋設物1の形状あるいは大きさなどを考慮して、任意の位置に任意の個数取り付けることができる。なお、図13の第4実施例に示すように、固定部材8の脱落防止のため、固定部材8と保護カバー10との隙間にスペーサ19を入れるとよい。   As shown in FIG. 9, also in the third embodiment, in order to prevent the sheet member 6 from falling off more reliably, the dropping prevention member 15 and a fixing bolt 16 for fixing the same at a position facing the concave groove 4 are provided. It is preferable to have a configuration in which In addition, in consideration of the shape or size of the tubular embedded object 1, any number of dropout prevention members 15 can be attached at any position. As shown in the fourth embodiment of FIG. 13, a spacer 19 may be inserted in the gap between the fixing member 8 and the protective cover 10 to prevent the fixing member 8 from falling off.

以上、実施例に沿って本発明の構成とその作用効果について説明したが、本発明の実施の形態は上記実施例に限定されるものではない。   As mentioned above, although the structure of this invention and its effect were demonstrated along the Example, embodiment of this invention is not limited to the said Example.

例えば、上記実施の形態では、既に地中に埋設され、管渠の壁面に地震時などにひび割れを誘導するために形成された脆弱部又は管渠の継目部に対して耐震性及び水密性を付与する管状埋設物及びその製造方法について説明したが、本発明はこれに限られるものではなく、これから埋設される管状埋設物に対しても有効である。   For example, in the above-described embodiment, seismic resistance and water tightness are provided to the brittle part or the joint part of the pipe already embedded in the ground and formed to induce cracks in the wall of the pipe during an earthquake or the like. Although the tubular embedment to be provided and the manufacturing method thereof have been described, the present invention is not limited to this, and is also effective for a tubular embedment to be embedded.

すなわち、埋設される前の管状埋設物1の内壁面に、あらかじめ凹溝4を、長さ方向に沿って所定間隔で複数形成しておくことにより、あるいは管状埋設物1の後端部及び前端部に周設しておくことにより、管状埋設物1の埋設時に地盤の急変部にあたる箇所あるいは管渠の継目部Jに対して、あらかじめ設けておいた一対の凹溝4(4a,4b)間にシート部材6を配置し、上記同様に固定部材8,8で保持固定するようにすればよい。この場合、凹溝4の形成は、型枠内にコンクリートを流し込んで管状埋設物1を築造する段階で同時に形成することが可能である。この際同時に、各凹溝4内に断面コの字状の補強部材9を埋め込むことも可能である。   That is, by forming a plurality of concave grooves 4 at predetermined intervals along the length direction in advance on the inner wall surface of the tubular embedded object 1 before being embedded, or the rear end portion and the front end of the tubular embedded object 1 Between the pair of concave grooves 4 (4a, 4b) provided in advance with respect to a place corresponding to a sudden change part of the ground or the joint part J of the pipe rod when the tubular buried object 1 is buried. The sheet member 6 may be disposed on the base plate and held and fixed by the fixing members 8 and 8 as described above. In this case, the concave grooves 4 can be formed at the same time when the tubular buried object 1 is built by pouring concrete into the mold. At the same time, it is also possible to embed a U-shaped reinforcing member 9 in each concave groove 4.

また上記実施の形態では、シート部材6を、管状埋設物1の内壁面に取り付けた構成を示して説明したが、本発明はこれに限られるものではなく、埋設前の管状埋設物1であれば、管状埋設物1の外壁面にシート部材6を取り付ける構成とすることもできる。この場合、上で説明した第1〜第3の工程については、管状埋設物1の外壁面に対して行うことは勿論である。   Moreover, in the said embodiment, although the structure which attached the sheet | seat member 6 to the inner wall surface of the tubular buried thing 1 was shown and demonstrated, this invention is not restricted to this, What is the tubular buried thing 1 before being buried? For example, the sheet member 6 may be attached to the outer wall surface of the tubular embedded object 1. In this case, it goes without saying that the first to third steps described above are performed on the outer wall surface of the tubular embedded object 1.

管状埋設物1の外壁面にシート部材6を取り付ける構成では、内側に取り付ける場合に比較し、内面側にシート部材6や保護カバー10などが管状埋設物1内に露出されないため、流下機能の低下を防止することができる。   In the configuration in which the sheet member 6 is attached to the outer wall surface of the tubular embedded object 1, since the sheet member 6, the protective cover 10, and the like are not exposed in the tubular embedded object 1 on the inner surface side, compared with the case where the sheet member 6 is attached on the inner side, the flow down function is deteriorated. Can be prevented.

本発明の管状埋設物は、地中の埋設される下水道、雨水排水、電気・通信、地下通路などを構成するコンクリート製のボックスカルバートや円筒状の管渠の分野における用途展開をさらに広い領域で図ることができる。   The tubular buried object of the present invention can be used in a wider range of applications in the field of concrete box culverts and cylindrical pipes that constitute underground sewers, rainwater drainage, electricity / communications, underground passages, etc. Can be planned.

1 ; 管状埋設物
2 ; ボックスカルバート
2A ; 先端部
2B ; 後端部
2a ; 上壁面
2b ; 下壁面
2c ; 左壁面
2d ; 右壁面
2e ; 傾斜面
3 ; 脆弱部
4 ; (一対の)凹溝
4a ; 一方の凹溝
4b ; 他方の凹溝
6 ; シート部材
6A ; 伸縮部
6B ; 挟持部
6a ; 挟持部の内壁
8 ; 固定部材
8a ; 丸鋼
8b ; 管鋼
9 ; 補強部材
10 ; 保護カバー
10A; 第1部材
10B ; 第2部材
10a ; 平板部
10b ; テーパ部
11 ; 端部カバー
11a ; 基部
11b ; カバー部
12 ; 中央カバー12a
13 ; ガイド突起
14 ; ガイド長孔
15 ; 脱落防止部材
16 ; 固定ボルト
17 ; 保持部材
18 ; 固定ボルト
J ; 継目部
19 ; スペーサ
DESCRIPTION OF SYMBOLS 1; Tubular embedded object 2; Box culvert 2A; Front-end | tip part 2B; Rear-end part 2a; Upper wall surface 2b; Lower wall surface 2c; Left wall surface 2d; 4a; one concave groove 4b; the other concave groove 6; sheet member 6A; expansion and contraction part 6B; clamping part 6a; inner wall 8 of the clamping part; fixing member 8a; round steel 8b; 10A; 1st member 10B; 2nd member 10a; Flat plate part 10b; Tapered part 11; End cover 11a; Base part 11b; Cover part 12;
13; guide projection 14; guide slot 15; drop-off prevention member 16; fixing bolt 17; holding member 18; fixing bolt J; joint 19;

Claims (16)

前後に連設された管状埋設物(1)間の継目部(J)又は壁面にひび割れを誘導する脆弱部(3)が形成された管状埋設物(1)において、
前記管状埋設物(1)の壁面で且つ前記継目部(J)又は前記脆弱部(3)を挟んだ両側の位置に凹設された一対の凹溝(4)と、一方の凹溝(4a)と他方の凹溝(4b)との間に配置されて前記継目部(J)又は前記脆弱部(3)を覆うシート部材(6)と、前記凹溝(4)内に前記シート部材(6)と共に挟み込まれて前記シート部材(6)を保持固定する固定部材(8)と、を有することを特徴とする管状埋設物。
In the tubular embedment (1) in which the joint (J) between the tubular embedments (1) arranged in the front-rear direction or the fragile part (3) that induces cracks on the wall surface is formed,
A pair of grooves (4) that are recessed on the wall surface of the tubular embedded object (1) and on both sides of the joint (J) or the fragile part (3), and one groove (4a) ) And the other concave groove (4b) to cover the seam portion (J) or the weakened portion (3), and the sheet member (6) in the concave groove (4). 6) A tubular embedded object having a fixing member (8) sandwiched together with the sheet member (6) to hold and fix the sheet member (6).
シート部材(6)の幅方向の両端に、断面U字形状からなる挟持部(6B)を形成した管状埋設物。 A tubular embedded object in which sandwiching portions (6B) having a U-shaped cross section are formed at both ends in the width direction of the sheet member (6). シート部材(6)が蛇腹状の伸縮部(6A)を備えたものである請求項1又は2記載の管状埋設物。 The tubular embedded article according to claim 1 or 2, wherein the sheet member (6) is provided with a bellows-like stretchable part (6A). 一対の凹溝(4)内に、断面コの字形状からなる補強部材(9)を設けた請求項1乃至3のいずれか一項に記載の管状埋設物。 The tubular embedded article according to any one of claims 1 to 3, wherein a reinforcing member (9) having a U-shaped cross section is provided in the pair of concave grooves (4). 固定部材(8)を鋼管(8b)で形成した請求項1乃至4のいずれか一項に記載の管状埋設物。 The tubular embedded object according to any one of claims 1 to 4, wherein the fixing member (8) is formed of a steel pipe (8b). 鋼管(8b)を断面楕円状とした請求項5記載の管状埋設物。 The tubular buried object according to claim 5, wherein the steel pipe (8b) has an elliptical cross section. 一対の凹溝(4)を管状埋設物(1)の壁面に沿って周状に形成すると共に、シート部材(6)を環帯状に形成し且つ固定部材(8)を線状又は円弧状に形成した請求項1乃至6のいずれか一項に記載の管状埋設物。 The pair of concave grooves (4) are formed in a circumferential shape along the wall surface of the tubular embedded object (1), the sheet member (6) is formed in an annular shape, and the fixing member (8) is formed in a linear shape or an arc shape. The tubular embedded object according to any one of claims 1 to 6, which is formed. 一対の凹溝(4)、シート部材(6)及び固定部材(8)を管状埋設物(1)の内壁面に設けた請求項1乃至7のいずれか一項に記載の管状埋設物。 The tubular embedded object according to any one of claims 1 to 7, wherein the pair of concave grooves (4), the sheet member (6), and the fixing member (8) are provided on the inner wall surface of the tubular embedded object (1). シート部材(6)を覆う保護カバー(10)を設けた請求項1乃至8のいずれか一項に記載の管状埋設物。 The tubular embedded object according to any one of claims 1 to 8, further comprising a protective cover (10) that covers the sheet member (6). 保護カバー(10)が、管状埋設物(1)側に固定されてシート部材(6)の両端部をそれぞれ覆う一対の端部カバー(11)と、前記両端部を除くシート部材(6)の中央部を覆うと共に前記端部カバー(11)に対してスライド可能に取り付けられた中央カバー(12)とを有して構成される請求項9記載の管状埋設物。 A protective cover (10) is fixed to the tubular embedded object (1) side and covers a pair of end covers (11) respectively covering both ends of the sheet member (6), and a sheet member (6) excluding the both ends. The tubular embedded article according to claim 9, comprising a central cover (12) that covers the central part and is slidably attached to the end cover (11). 凹溝(4)と対向する位置に、固定部材(8)が前記凹溝(4)から抜け出るのを防止する脱落防止部材(15)を設けた請求項1乃至10のいずれか一項に記載の管状埋設物。 The drop-off preventing member (15) for preventing the fixing member (8) from coming out of the recessed groove (4) is provided at a position facing the recessed groove (4). Tubular buried object. 端部カバー(11)の一部を凹溝(4)に対向させることにより脱落防止部材(15)とした請求項11記載の管状埋設物。 The tubular embedded object according to claim 11, wherein a part of the end cover (11) is opposed to the concave groove (4) to form a drop-off preventing member (15). 前後に連設された管状埋設物(1)間の継目部(J)又は壁面にひび割れを誘導する脆弱部(3)が形成された管状埋設物の製造方法において、
前記管状埋設物(1)の壁面で且つ前記継目部(J)又は前記脆弱部(3)を挟んだ両側に一対の凹溝(4)をそれぞれ凹設する第1の工程と、一方の凹溝(4a)と他方の凹溝(4b)との間にシート部材(6)を配置されて前記継目部(J)又は前記脆弱部(3)を覆う第2の工程と、一対の固定部材(8)を前記シート部材(6)と共に前記一対の凹溝(4a,4b)のそれぞれに挿入して前記シート部材(6)を固定する第3の工程と、を有することを特徴とする管状埋設物の製造方法。
In the method for producing a tubular embedded object in which a joint (J) between the tubular embedded objects (1) arranged in the front and rear (1) or a fragile part (3) for inducing cracks on the wall surface is formed,
A first step of forming a pair of concave grooves (4) on both sides of the wall of the tubular embedded object (1) and sandwiching the joint portion (J) or the fragile portion (3); A second step in which a sheet member (6) is disposed between the groove (4a) and the other concave groove (4b) to cover the joint (J) or the weakened portion (3), and a pair of fixing members And (3) inserting the sheet member (6) together with the sheet member (6) into each of the pair of concave grooves (4a, 4b) to fix the sheet member (6). Manufacturing method for buried objects.
一対の凹溝(4)をそれぞれ凹設する第1の工程の後に、前記一対の凹溝(4)の内面に断面コの字形状からなる補強部材(9)を設ける工程を有する請求項13記載の管状埋設物の製造方法。 14. A step of providing a reinforcing member (9) having a U-shaped cross section on the inner surface of the pair of concave grooves (4) after the first step of forming the pair of concave grooves (4). The manufacturing method of the tubular buried thing of description. 断面中空円形状の固定部材(8)を凹溝(4)内に挿入する第3の工程の後に、前記固定部材(8)を断面略楕円形状に押し潰す工程を備える請求項13又は14記載の管状埋設物の製造方法。 The step of crushing the fixing member (8) into a substantially elliptical cross section after the third step of inserting the fixing member (8) having a hollow circular cross section into the concave groove (4). Manufacturing method for tubular embedded objects. 第1乃至第3の工程を管状埋設物(1)の内壁面に対して行う請求項13乃至15のいずれか一項に記載の管状埋設物の製造方法。
The method for manufacturing a tubular embedded object according to any one of claims 13 to 15, wherein the first to third steps are performed on the inner wall surface of the tubular embedded object (1).
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