JP3546115B2

JP3546115B2 - Waterproof panel mounting device for the final joint of a buried box

Info

Publication number: JP3546115B2
Application number: JP26102696A
Authority: JP
Inventors: 昌夫保川; 勝明三谷; 弘文達
Original assignee: Kumagai Gumi Co Ltd
Current assignee: Kumagai Gumi Co Ltd
Priority date: 1996-10-01
Filing date: 1996-10-01
Publication date: 2004-07-21
Anticipated expiration: 2016-10-01
Also published as: JPH10102522A

Description

【０００１】
【発明の属する技術分野】
本発明は沈埋トンネルを構築する際に沈設された沈埋函最終継手部の止水構造に関するものである。
【０００２】
【従来の技術及び発明が解決しようとする課題】
従来、沈埋トンネルを構築する際は沈埋函を沈設して順次連結していき、沈埋函最終継手部は一般的に止水パネル方式で接続している。しかし、止水パネル方式は排水によるゴムガスケットの反力を一時的に受けるため、潜水夫の作業によって沈埋函の端面間に反力受けのストラット鋼材を設置する必要がある。
【０００３】
また、側面の止水パネルを設置した後に底面の止水パネルを設置するのが困難であり、潜水夫の作業時間が長くなることが多い。更に、止水パネル間の止水性を確保するのに手間が掛かりコストアップの要因になっている。
【０００４】
そこで、沈設された沈埋函最終継手部を接続するに際して、ストラット鋼材の設置をなくすとともに止水パネルの取り付けを簡単にし、潜水夫の作業を極力少なくしてコストダウンを図るために解決すべき技術的課題が生じてくるのであり、本発明はこの課題を解決することを目的とする。
【０００５】
【課題を解決するための手段】
本発明は上記目的を達成するために提案されたものであり、順次沈設して連結された沈埋函最終継手部の止水構造に於いて、止水パネルは外側パネルと内側パネルとからなり、且つ、その間に膨張可能なゴム袋を介装してあり、一方、沈埋函最終継手部の外壁面に電磁石を設置して前記外側パネルを吸着可能にし、且つ、この外壁面にガイドを突設するとともに該ガイドに係合するガイド溝を前記外側パネルに設け、更に、前記ゴム袋へ固化材を圧入して膨張させたときに、ゴム袋の端部にて沈埋函の端面を圧接するように形成するとともに、前記止水パネルのゴム袋とこれに隣接する止水パネルのゴム袋との間に、チューブ形のパッキンを設けた沈埋函最終継手部の止水構造を提供するものである。
【０００６】
【発明の実施の形態】
以下、本発明の実施の形態を図面に従って詳述する。図１乃至図３は沈埋函最終継手部の止水パネル１０を示し、鋼鉄製またはプレキャストコンクリート製の外側パネル１１と内側パネル１２とを２枚合わせにし、且つ、その間に膨張可能なゴム袋１３を介装してある。該ゴム袋１３は外側パネル１１の下面と内側パネル１２の上面に貼着されており、外側パネル１１の上面に突設した注入口１４から流体を注入することにより、二点鎖線で示すように、該ゴム袋１３が膨張して外側パネル１１と内側パネル１２とが離間するように形成してある。また、外側パネル１１の左右両端にガイド溝１５を設ける。このガイド溝１５のピッチは、後述する沈埋函外壁面に突設したガイド２０の間隔と同一ピッチにする。
【０００７】
図４及び図５は沈埋函最終継手部１６を示し、沈設された沈埋函１７の端面には段設部１８を設けてあり、沈埋函１７の内部はバルクヘッド１９で遮蔽されている。沈埋函１７の外壁面には所定間隔でガイド２０を突設し、二点鎖線で示すように、止水パネル１０を装着する際に前記ガイド溝１５をこのガイド２０へ係合すれば、止水パネル１０は正確に位置決めされて沈埋函最終継手部１６に取り付けられる。従って、止水パネル１０を装着したときに取り付け位置を微調整する必要はない。
【０００８】
ここで、前記段設部１８に電磁石２１を設置する。該電磁石２１は沈埋函１７の外壁面に適宜間隔で埋設され、鋼鉄製の止水パネル１０を装着する際には沈埋函１７の内部から電磁石２１を作動して、外側パネル１１の裏面を磁力にて吸着する。例えば、沈埋函最終継手部１６の底面側に止水パネル１０を装着する場合は、施工箇所の近傍に止水パネル１０をセットすれば、電磁石２１により止水パネル１０が沈埋函１７に吸着されて保持される。従って、止水パネル１０の保持が容易となり、従来は長時間に亘って行われていた潜水夫の作業が著しく短縮される。
【０００９】
沈埋函最終継手部１６に止水パネル１０を順次装着し、沈埋函１７，１７の間を止水パネル１０で被蔽した後は、図６に示すように、外側パネル１１の上面に突設した注入口１４にホース２２を接続する。第１工程では、一つ置きの止水パネル１０の注入口１４に夫々ホース２２を接続し、前記ゴム袋１３内にセメント系或いはそれに類する固化材２３を圧入する。然るときは、ゴム袋１３が膨張して沈埋函１７，１７の端面をゴム袋１３の左右両端部が圧接するとともに、図３の二点鎖線で示したように、ゴム袋１３の前後両端部が止水パネル１０の両側から少しはみ出す。ゴム袋１３の前端または後端には、チューブ形のパッキン２４を装着しておく。
【００１０】
膨張して硬化したゴム袋１３は、バルクヘッド１９，１９間の水を排水するときに止水材の役目を受け持つとともに、沈埋函１７，１７の端面間に生じる反力を受けるストラットの役目を果たす。尚、図７に示すように、沈埋函１７の端面に凹部２５（または凸部）を設けておく。
【００１１】
そして、ゴム袋１３内の固化材が固まった後、第２工程では、残りの止水パネル１０の注入口１４に夫々ホース２２を接続し、ゴム袋１３内に固化材２３を圧入して膨張させる。このとき、隣接する止水パネル１０がゴム袋１３の膨張によって相互に干渉しないように、予め止水パネル１０，１０の前後間隙を最適寸法に設定しておく。
【００１２】
図８に示すように、各ゴム袋１３が硬化した時点で、前記チューブ形のパッキン２４内に固化材を圧入して膨張させ、隣接する止水パネル１０，１０のゴム袋１３，１３間の止水を行う。このパッキン２４により止水パネル１０，１０間の止水が確実になされる。そして、このパッキン２４内の固化材が固まり、すべての止水パネル１０が止水された状態で固定された後に、前記電磁石２１の作動を解除する。
【００１３】
而して、沈埋函最終継手部１６の双方のバルクヘッド１９，１９間の水をポンプで排水し、沈埋函１７，１７を水圧接合する。このとき、止水パネル１０には沈埋函１７，１７が引き寄せられる方向に応力が作用するが、硬化したゴム袋１３がトンネル軸方向の反力となる。また、図７で説明した凹部２５（または凸部）が、止水パネル１０のトンネル軸直角方向の剪断力に対する支えとなる。
【００１４】
尚、本発明は、本発明の精神を逸脱しない限り種々の改変を為すことができ、そして、本発明が該改変されたものに及ぶことは当然である。
【００１５】
【発明の効果】
以上説明したように、本発明では沈埋函最終継手部に止水パネルを装着する際に、沈埋函の外壁面に突設したガイドに止水パネルのガイド溝を係合させて位置決めを行い、電磁石の作動によって止水パネルを外壁面に吸着させる。従って、止水パネルの位置合わせが正確で微調整の必要がなく、止水パネルの保持性も良好である。また、固化材で膨張したゴム袋の端部にて沈埋函の端面を圧接するので、高い止水性を確保できるとともに沈埋函の端面間に生じる反力を該ゴム袋にて受けることが出来る。このため、従来必要とされていたストラット鋼材の設置が不要となり、潜水夫の作業を減少できる。
【００１６】
斯くして、沈埋函最終継手部の止水性が向上し、止水パネルのみで確実に止水できるとともに、止水パネルの取付作業が簡略化され、工期を短縮してコストダウンを図ることができる。
【図面の簡単な説明】
図は本発明の実施の形態を示すものである。
【図１】止水パネルの正面図。
【図２】止水パネルの平面図。
【図３】止水パネルの底面図。
【図４】沈埋函最終継手部の断面図。
【図５】沈埋函最終継手部の拡大平面図。
【図６】止水パネルのゴム袋へ固化材を圧入した状態の沈埋函最終継手部の断面図。
【図７】沈埋函の端面に凹部を設けた沈埋函最終継手部の拡大断面図。
【図８】隣接する止水パネルのゴム袋間に設けたパッキンを示す拡大断面図。
【符号の説明】
１０止水パネル
１１外側パネル
１２内側パネル
１３ゴム袋
１５ガイド溝
１６沈埋函最終継手部
１７沈埋函
２０ガイド
２１電磁石
２３固化材
２４パッキン[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a water-stop structure of a final joint of a buried box laid when a buried tunnel is constructed.
[0002]
Problems to be solved by the prior art and the invention
Conventionally, when constructing a submerged tunnel, a submerged box is submerged and connected sequentially, and the final joint of the submerged box is generally connected by a water stop panel method. However, since the water stop panel system temporarily receives the reaction force of the rubber gasket due to drainage, it is necessary to install a strut steel material to receive the reaction force between the end faces of the submerged box by the work of the diver.
[0003]
In addition, it is difficult to install the water stop panel on the bottom surface after installing the water stop panel on the side surface, and the work time of the diver often becomes long. Further, it takes time and effort to secure the water stoppage between the water stop panels, resulting in an increase in cost.
[0004]
Therefore, when connecting the final joint of the submerged buried box, a technology that should be solved in order to eliminate the installation of strut steel, simplify the installation of the water stop panel, reduce the work of the diver and minimize the cost Therefore, an object of the present invention is to solve this problem.
[0005]
[Means for Solving the Problems]
The present invention has been proposed in order to achieve the above object, and in the water stopping structure of the buried box final joint portion which is sequentially sunk and connected, the water stopping panel includes an outer panel and an inner panel, In addition, an inflatable rubber bag is interposed therebetween, and an electromagnet is installed on the outer wall surface of the final joint of the submerged box to enable the outer panel to be attracted, and a guide is projected on the outer wall surface. And a guide groove for engaging the guide is provided on the outer panel. Further, when the solidified material is press-fitted into the rubber bag and expanded, the end face of the sunk box is pressed against the end of the rubber bag. And a waterproof structure of a final joint of a submerged box in which a tube-shaped packing is provided between the rubber bag of the waterproof panel and the rubber bag of the waterproof panel adjacent thereto. .
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 3 show a waterproof panel 10 at the final joint portion of a submerged box. An outer panel 11 and an inner panel 12 made of steel or precast concrete are combined and an inflatable rubber bag 13 is interposed therebetween. Is interposed. The rubber bag 13 is attached to the lower surface of the outer panel 11 and the upper surface of the inner panel 12, and by injecting a fluid from an inlet 14 protruding from the upper surface of the outer panel 11, as shown by a two-dot chain line. The outer bag 11 and the inner panel 12 are formed so that the rubber bag 13 expands and separates. Further, guide grooves 15 are provided at both left and right ends of the outer panel 11. The pitch of the guide grooves 15 is the same as the interval between the guides 20 projecting from the outer wall surface of the submerged box described later.
[0007]
FIGS. 4 and 5 show the final joint 16 of the submerged box, and a stepped portion 18 is provided on the end face of the submerged box 17, and the inside of the submerged box 17 is shielded by a bulkhead 19. Guides 20 are provided at predetermined intervals on the outer wall surface of the submerged box 17, and as shown by a two-dot chain line, when the guide groove 15 is The water panel 10 is accurately positioned and mounted on the final joint 16 of the submerged box. Therefore, it is not necessary to finely adjust the mounting position when the water stop panel 10 is mounted.
[0008]
Here, an electromagnet 21 is installed on the stepped portion 18. The electromagnet 21 is buried at an appropriate interval on the outer wall surface of the submerged box 17. When the steel water-stop panel 10 is mounted, the electromagnet 21 is operated from the inside of the submerged box 17 to apply a magnetic force to the back surface of the outer panel 11. Adsorb with. For example, when installing the water stop panel 10 on the bottom surface side of the final joint section 16 of the buried box, if the water stop panel 10 is set near the construction location, the water stop panel 10 is adsorbed to the buried box 17 by the electromagnet 21. Is held. Therefore, holding of the water stop panel 10 becomes easy, and the work of the diver, which has conventionally been performed for a long time, is significantly reduced.
[0009]
After the water stop panel 10 is sequentially mounted on the final joint 16 of the buried box, and the space between the buried boxes 17, 17 is covered with the water stop panel 10, as shown in FIG. The hose 22 is connected to the inlet 14 thus set. In the first step, hoses 22 are respectively connected to the inlets 14 of every other water stop panel 10, and a cement-based or similar solidifying material 23 is pressed into the rubber bag 13. At that time, the rubber bag 13 expands and the right and left ends of the rubber bag 13 press against the end faces of the sunk boxes 17, 17 and, as shown by the two-dot chain line in FIG. The part slightly protrudes from both sides of the water stop panel 10. A tube-shaped packing 24 is attached to the front end or the rear end of the rubber bag 13.
[0010]
The rubber bag 13 which has been inflated and hardened serves as a water-stopping material when draining water between the bulkheads 19 and 19, and also serves as a strut which receives a reaction force generated between the end faces of the submerged boxes 17 and 17. Fulfill. In addition, as shown in FIG. 7, a concave portion 25 (or a convex portion) is provided on an end surface of the immersion box 17.
[0011]
Then, after the solidified material in the rubber bag 13 is solidified, in the second step, hoses 22 are respectively connected to the inlets 14 of the remaining water stop panel 10, and the solidified material 23 is pressed into the rubber bag 13 to expand. Let it. At this time, the front and rear gaps between the water stop panels 10 and 10 are set to an optimum size in advance so that the adjacent water stop panels 10 do not interfere with each other due to the expansion of the rubber bag 13.
[0012]
As shown in FIG. 8, when each of the rubber bags 13 is cured, the solidified material is press-fitted into the tube-shaped packing 24 to expand the space between the rubber bags 13, 13 of the adjacent waterproofing panels 10, 10. Stop water. The packing 24 ensures that water is stopped between the water stop panels 10 and 10. Then, after the solidified material in the packing 24 is solidified and all the water stop panels 10 are fixed in a state where water is stopped, the operation of the electromagnet 21 is released.
[0013]
Then, the water between the bulkheads 19 of the final joint 16 of the buried box is drained by a pump, and the buried boxes 17 are hydraulically joined. At this time, stress acts on the water stop panel 10 in the direction in which the buried boxes 17 are drawn, but the cured rubber bag 13 becomes a reaction force in the tunnel axial direction. The concave portion 25 (or convex portion) described with reference to FIG. 7 serves as a support for the shearing force of the water stop panel 10 in the direction perpendicular to the tunnel axis.
[0014]
The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.
[0015]
【The invention's effect】
As described above, in the present invention, when mounting the water stop panel on the final joint of the buried box, positioning is performed by engaging the guide groove of the water stop panel with the guide protruding from the outer wall surface of the buried box, The water stop panel is attracted to the outer wall surface by the operation of the electromagnet. Accordingly, the positioning of the water stop panel is accurate and does not require fine adjustment, and the water stop panel has good holding properties. In addition, since the end face of the buried box is pressed against the end of the rubber bag expanded with the solidified material, high waterproofness can be ensured and the reaction force generated between the end faces of the buried box can be received by the rubber bag. For this reason, the installation of the strut steel material which has been required conventionally becomes unnecessary, and the work of the diver can be reduced.
[0016]
In this way, the waterproofness of the final joint of the submerged box is improved, water can be reliably stopped only with the waterproofing panel, the work of mounting the waterproofing panel is simplified, the construction period is shortened, and the cost is reduced. it can.
[Brief description of the drawings]
The figure shows an embodiment of the present invention.
FIG. 1 is a front view of a water stop panel.
FIG. 2 is a plan view of a water stop panel.
FIG. 3 is a bottom view of the water stop panel.
FIG. 4 is a cross-sectional view of the final joint of the buried box.
FIG. 5 is an enlarged plan view of a final joint part of the submerged box.
FIG. 6 is a cross-sectional view of the final joint of the submerged box in a state where the solidified material is pressed into the rubber bag of the water stop panel.
FIG. 7 is an enlarged cross-sectional view of a final joint portion of the immersion box in which a concave portion is provided on an end surface of the immersion box.
FIG. 8 is an enlarged cross-sectional view showing a packing provided between rubber bags of adjacent water stop panels.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Water stop panel 11 Outer panel 12 Inner panel 13 Rubber bag 15 Guide groove 16 Submerged box final joint part 17 Submerged box 20 Guide 21 Electromagnet 23 Solidified material 24 Packing

Claims

順次沈設して連結された沈埋函最終継手部の止水構造に於いて、止水パネルは外側パネルと内側パネルとからなり、且つ、その間に膨張可能なゴム袋を介装してあり、一方、沈埋函最終継手部の外壁面に電磁石を設置して前記外側パネルを吸着可能にし、且つ、この外壁面にガイドを突設するとともに該ガイドに係合するガイド溝を前記外側パネルに設け、更に、前記ゴム袋へ固化材を圧入して膨張させたときに、ゴム袋の端部にて沈埋函の端面を圧接するように形成するとともに、前記止水パネルのゴム袋とこれに隣接する止水パネルのゴム袋との間に、チューブ形のパッキンを設けたことを特徴とする沈埋函最終継手部の止水構造。In the watertight structure of the final joint of the buried box, which is successively sunk and connected, the waterstop panel consists of an outer panel and an inner panel, and an inflatable rubber bag is interposed between them. Installing an electromagnet on the outer wall surface of the final joint of the submerged box to allow the outer panel to be attracted, and providing a guide groove on the outer wall surface with a guide protruding from the outer wall surface and engaging the guide. Further, when the solidified material is press-fitted into the rubber bag and expanded, the end of the rubber bag is formed so as to be pressed against the end surface of the rubber bag, and the rubber bag of the water-stop panel is adjacent to the rubber bag. A waterproof structure at the final joint of a buried box, wherein a tube-shaped packing is provided between the waterproof bag and the rubber bag of the waterproof panel.