JP2011196037A - Lock bolt fastening structure - Google Patents

Lock bolt fastening structure Download PDF

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Publication number
JP2011196037A
JP2011196037A JP2010061794A JP2010061794A JP2011196037A JP 2011196037 A JP2011196037 A JP 2011196037A JP 2010061794 A JP2010061794 A JP 2010061794A JP 2010061794 A JP2010061794 A JP 2010061794A JP 2011196037 A JP2011196037 A JP 2011196037A
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JP
Japan
Prior art keywords
nut
plate
lock bolt
curved surface
natural ground
Prior art date
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Pending
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JP2010061794A
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Japanese (ja)
Inventor
Hiroshi Okada
弘 岡田
Tsutomu Kobayashi
勉 小林
Hideyuki Honma
英幸 本間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nishimatsu Construction Co Ltd
Hokuetsu Metal Co Ltd
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Nishimatsu Construction Co Ltd
Hokuetsu Metal Co Ltd
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Publication date
Application filed by Nishimatsu Construction Co Ltd, Hokuetsu Metal Co Ltd filed Critical Nishimatsu Construction Co Ltd
Priority to JP2010061794A priority Critical patent/JP2011196037A/en
Publication of JP2011196037A publication Critical patent/JP2011196037A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To fit a plate to the surface of a natural ground even if a lock bolt is not driven at right angle to the surface of the natural ground but driven diagonally in a structure in which a nut is fastened to the base end of the lock bolt while being placed on a plate.SOLUTION: In this structure in which the nut 3 is fastened to the base end of the lock bolt 1 fixed to the natural ground while being placed on the plate 2, the seat surface of the nut 3 against the plate 2 is formed in a curved part 31. The seat surface of the plate 2 on the nut 3 is formed in a curved part 21 corresponding to the curved part 31 of the nut 3. A recess 22 for storing the nut 3 is formed in the plate 2.

Description

本発明は、地山に定着させたロックボルト基端部にプレートに重ねてナットを締め付ける構造に関する。   The present invention relates to a structure in which a nut is tightened by overlapping a plate on a base end portion of a lock bolt fixed on a natural ground.

ロックボルトは、山岳トンネル工法において、トンネル周囲の地山に挿入して定着させ、突出する基端部にナットを螺合させて締め付けを行うことにより、地山の耐荷性能を向上させる。
通常、ロックボルト施工後の地山には防水シートが被せられ、その後に次工程へと移っていく。そこで、防水シートを被せ易くするため、また、被せた防水シートが傷まないようにするため、ロックボルト施工後の基端部の突出長を短くする工夫がなされてきた。
In the mountain tunnel construction method, the rock bolt is inserted and fixed in a natural ground around the tunnel, and a nut is screwed into a protruding base end to tighten, thereby improving the load resistance performance of the natural ground.
Normally, a waterproof sheet is put on the natural ground after the rock bolt construction, and then it moves to the next process. Therefore, in order to make it easier to cover the waterproof sheet and to prevent the covered waterproof sheet from being damaged, a device has been devised to shorten the protruding length of the base end after the construction of the lock bolt.

特許文献1には、地山に定着させたロックボルト基端部に、プレートに一体化結合したナットを締め付ける構造が開示されている。
特許文献2には、プレートに重ねてナットを、ロックボルト基端部に締め付ける構造が開示されている。
特許文献3には、プレートとナットをテーパ形状で係合する構造が開示されている。
Patent Document 1 discloses a structure in which a nut integrally joined to a plate is fastened to a base end portion of a lock bolt fixed to a natural ground.
Patent Document 2 discloses a structure in which a nut is overlapped on a plate and a nut is fastened to a base end portion of a lock bolt.
Patent Document 3 discloses a structure in which a plate and a nut are engaged in a tapered shape.

特開平7−119393号公報JP-A-7-119393 特開2001−323799号公報JP 2001-323799 A 特開2009−293196号公報JP 2009-293196 A

しかし、特許文献1−3のような従来の締付構造では、ロックボルト基端部に対しプレート及びナットの座面が直角となっているため、地山の表面に対し直角にロックボルトを打設しないと、プレートの片側が浮いてしまう問題があった。   However, in the conventional tightening structure as disclosed in Patent Documents 1-3, the seat surface of the plate and nut is at a right angle to the base end of the lock bolt. Otherwise, there was a problem that one side of the plate floated.

本発明の課題は、ロックボルト基端部にプレートに重ねてナットを締め付ける構造において、地山の表面に対し直角にロックボルトが打設されていなくて傾斜していても、地山表面にプレートを密着させられるようにすることである。   It is an object of the present invention to provide a structure in which a nut is tightened by overlapping a plate on the base end portion of a lock bolt, even if the lock bolt is not placed at a right angle to the surface of the natural ground and is inclined, It is to be able to adhere.

以上の課題を解決するため、請求項1に記載の発明は、地山に定着させたロックボルト基端部にプレートに重ねてナットを締め付ける構造であって、前記ナットの前記プレートに対する座面を曲面部に形成したことを特徴とする。   In order to solve the above-described problems, the invention according to claim 1 is a structure in which a nut is fastened to a base of a lock bolt fixed to a natural ground and is tightened on a plate, and a seating surface of the nut with respect to the plate is provided. It is characterized by being formed on a curved surface portion.

請求項2に記載の発明は、請求項1に記載のロックボルト締付構造であって、前記プレートの前記ナットの着座面を、前記ナットの曲面部に対応する曲面部に形成したことを特徴とする。   The invention according to claim 2 is the lock bolt tightening structure according to claim 1, wherein the seating surface of the nut of the plate is formed in a curved surface portion corresponding to the curved surface portion of the nut. And

請求項3に記載の発明は、請求項1または2に記載のロックボルト締付構造であって、前記プレートに前記ナットを収容する窪み部を形成したことを特徴とする。   A third aspect of the present invention is the lock bolt tightening structure according to the first or second aspect, characterized in that a recess for accommodating the nut is formed in the plate.

本発明によれば、地山の表面に対し直角にロックボルトが打設されていなくて傾斜していても、地山表面にプレートを密着させることができる。   According to the present invention, the plate can be brought into close contact with the surface of the natural ground even if the lock bolt is not driven at right angles to the surface of the natural ground and is inclined.

本発明を適用したロックボルト締付構造の実施形態1の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of Embodiment 1 of the lock bolt fastening structure to which this invention is applied. 実施形態2のプレートを示す平面図(a)とその中央縦断面図(b)である。It is the top view (a) which shows the plate of Embodiment 2, and its center longitudinal cross-sectional view (b). 実施形態2のナットを示す平面図(a)とその正面半断面図(b)と側面半断面図(c)と底面図(d)である。It is the top view (a) which shows the nut of Embodiment 2, its front half sectional view (b), a side half sectional view (c), and a bottom view (d). 実施形態2のプレート及びナットによるロックボルト締付構造を示す平面図(a)とその中央縦断面図(b)である。It is the top view (a) which shows the lock bolt fastening structure by the plate and nut of Embodiment 2, and its center longitudinal cross-sectional view (b).

以下、図を参照して本発明を実施するための形態を詳細に説明する。
(実施形態1)
図1(a)及び(b)は本発明を適用したロックボルト締付構造の実施形態1の構成を示すもので、図中、1はロックボルト、2はプレート、3はナット、Gは地山である。
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
1 (a) and 1 (b) show the configuration of Embodiment 1 of a lock bolt fastening structure to which the present invention is applied. In the figure, 1 is a lock bolt, 2 is a plate, 3 is a nut, and G is a ground. It is a mountain.

図示のように、地山Gに定着させたロックボルト1の基端部にプレート2に重ねてナット3が締め付けられている。   As shown in the drawing, a nut 3 is tightened on the base plate 2 of the lock bolt 1 fixed to the natural ground G so as to overlap the plate 2.

ナット3は、図示のように、プレート2に対する座面が曲面部31に形成されている。   As shown in the drawing, the nut 3 has a curved surface 31 with a seating surface for the plate 2.

プレート2は、ロックボルト1の基端部が挿入される貫通孔の周囲でナット3の着座部が、図示のように、ナット3の曲面部31に対応した同様曲率の凹みによる曲面部21に形成されている。   In the plate 2, the seating portion of the nut 3 around the through hole into which the base end portion of the lock bolt 1 is inserted becomes a curved surface portion 21 having a similar curvature corresponding to the curved surface portion 31 of the nut 3 as shown in the figure. Is formed.

また、プレート2には、地山Gに定着させたロックボルト1の基端部に締め付けた状態のナット3を収容する深さの窪み部22が形成されており、この窪み部22に貫通孔及び曲面部21が形成されている。   The plate 2 is formed with a recess 22 having a depth for receiving the nut 3 in a state of being fastened to the base end of the lock bolt 1 fixed to the ground G. The recess 22 has a through hole. And the curved surface part 21 is formed.

以上、実施形態のプレート2及びナット3を用いることで、地山Gに定着させたロックボルト1の基端部にプレート2に重ねてナット3を締め付けると、図示したように、地山Gの表面に対し直角にロックボルト1が打設されていなくて傾斜していた場合でも、プレート2の曲面部21にナット3の曲面部31が着座して傾斜角度に追従するため、地山Gの表面にプレート2を密着させることができる。   As described above, by using the plate 2 and the nut 3 of the embodiment, when the nut 3 is tightened on the base end portion of the lock bolt 1 fixed to the natural ground G so as to overlap the plate 2, Even when the lock bolt 1 is not driven at right angles to the surface and is inclined, the curved surface portion 31 of the nut 3 is seated on the curved surface portion 21 of the plate 2 and follows the inclination angle. The plate 2 can be brought into close contact with the surface.

そして、ロックボルト1の基端部に締め付けた状態のナット3は、プレート2の窪み部22に収容された状態になって、施工後の地山Gの表面はほぼなだらかとなる。このため、図示しない防水シートで容易に地山Gを覆うことができ、防水シートがナット等によって傷められることもない。   And the nut 3 of the state fastened by the base end part of the lock bolt 1 will be in the state accommodated in the hollow part 22 of the plate 2, and the surface of the natural ground G after construction will become substantially gentle. For this reason, the natural ground G can be easily covered with a waterproof sheet (not shown), and the waterproof sheet is not damaged by a nut or the like.

(実施形態2)
図2(a)及び(b)は実施形態2のプレート2を示すもので、図示のように、プレート2には、前述した実施形態1と曲率が異なる、すなわち、曲率が小さい凹みによる曲面部21及び窪み部22が形成されている。
(Embodiment 2)
2 (a) and 2 (b) show the plate 2 of the second embodiment. As shown in the figure, the plate 2 has a curved portion having a curvature different from that of the first embodiment, that is, a dent having a small curvature. 21 and the recessed part 22 are formed.

図3(a)から(d)は実施形態2のナット3を示すもので、図示のように、ナット3の座面は、ナット2の曲面部21に対応した同様曲率の曲面部31に形成されている。   3A to 3D show the nut 3 according to the second embodiment. As shown in the figure, the seat surface of the nut 3 is formed on a curved surface portion 31 having the same curvature corresponding to the curved surface portion 21 of the nut 2. Has been.

図4(a)及び(b)は実施形態2のプレート2及びナット3によるロックボルト1の締付構造を示すもので、図示のように、地山Gに定着させたロックボルト1の基端部にプレート2に重ねてナット3を締め付けた状態で、プレート2の曲面部21にナット3の曲面部31が着座している。   4 (a) and 4 (b) show the tightening structure of the lock bolt 1 by the plate 2 and the nut 3 of the second embodiment, and the base end of the lock bolt 1 fixed to the natural ground G as shown in the figure. The curved surface portion 31 of the nut 3 is seated on the curved surface portion 21 of the plate 2 in a state where the nut 3 is tightened while being overlapped with the plate 2.

従って、前述した実施形態1と同様、例えば地山Gの表面に対しロックボルト1が傾斜して打設された場合でも、プレート2の曲面部21とナット3の曲面部31との当接により傾斜角度に追従して、プレート2が地山Gの表面に密着する。   Therefore, as in the first embodiment described above, for example, even when the lock bolt 1 is driven to be inclined with respect to the surface of the natural ground G, the curved surface portion 21 of the plate 2 and the curved surface portion 31 of the nut 3 are in contact with each other. The plate 2 closely contacts the surface of the natural ground G following the inclination angle.

なお、以上の実施形態においては、ナット及びプレートに曲面部を形成したが、本発明はこれに限定されるものではなく、少なくともナットの座面を曲面部に形成しただけであってもよい。
また、曲面部の曲率等も任意であり、その他、具体的な細部構造等についても適宜に変更可能であることは勿論である。
In the above embodiment, the curved surface portion is formed on the nut and the plate, but the present invention is not limited to this, and at least the seat surface of the nut may be formed on the curved surface portion.
Further, the curvature of the curved surface portion is arbitrary, and it is needless to say that other specific detailed structures can be appropriately changed.

1 ロックボルト
2 プレート
21 曲面部
22 窪み部
3 ナット
31 曲面部
G 地山
DESCRIPTION OF SYMBOLS 1 Rock bolt 2 Plate 21 Curved surface part 22 Indented part 3 Nut 31 Curved surface part G Ground

Claims (3)

地山に定着させたロックボルト基端部にプレートに重ねてナットを締め付ける構造であって、
前記ナットの前記プレートに対する座面を曲面部に形成したことを特徴とするロックボルト締付構造。
It is a structure that tightens the nut on the plate at the base end of the lock bolt fixed on the ground,
A lock bolt tightening structure, wherein a seat surface of the nut with respect to the plate is formed in a curved surface portion.
前記プレートの前記ナットの着座面を、前記ナットの曲面部に対応する曲面部に形成したことを特徴とする請求項1に記載のロックボルト締付構造。   The lock bolt fastening structure according to claim 1, wherein a seating surface of the nut of the plate is formed in a curved surface portion corresponding to the curved surface portion of the nut. 前記プレートに前記ナットを収容する窪み部を形成したことを特徴とする請求項1または2に記載のロックボルト締付構造。   The lock bolt tightening structure according to claim 1 or 2, wherein a recess for accommodating the nut is formed in the plate.
JP2010061794A 2010-03-18 2010-03-18 Lock bolt fastening structure Pending JP2011196037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010061794A JP2011196037A (en) 2010-03-18 2010-03-18 Lock bolt fastening structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010061794A JP2011196037A (en) 2010-03-18 2010-03-18 Lock bolt fastening structure

Publications (1)

Publication Number Publication Date
JP2011196037A true JP2011196037A (en) 2011-10-06

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Application Number Title Priority Date Filing Date
JP2010061794A Pending JP2011196037A (en) 2010-03-18 2010-03-18 Lock bolt fastening structure

Country Status (1)

Country Link
JP (1) JP2011196037A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5825400U (en) * 1982-05-10 1983-02-17 建設フアスナ−株式会社 Anchor plate for lock anchor
JPS61217000A (en) * 1985-01-30 1986-09-26 デイツカ−ホツフ・ウント・ウイドマン・アクチエンゲゼルシヤフト Apparatus for anchoring tensile material of anchor, especially, lock anchor
JPH10280899A (en) * 1997-04-02 1998-10-20 Kfc Ltd Nut-bearing plate combined body

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5825400U (en) * 1982-05-10 1983-02-17 建設フアスナ−株式会社 Anchor plate for lock anchor
JPS61217000A (en) * 1985-01-30 1986-09-26 デイツカ−ホツフ・ウント・ウイドマン・アクチエンゲゼルシヤフト Apparatus for anchoring tensile material of anchor, especially, lock anchor
JPH10280899A (en) * 1997-04-02 1998-10-20 Kfc Ltd Nut-bearing plate combined body

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