JP5132435B2 - Installation method of water stop box and water stop box - Google Patents

Installation method of water stop box and water stop box Download PDF

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JP5132435B2
JP5132435B2 JP2008159326A JP2008159326A JP5132435B2 JP 5132435 B2 JP5132435 B2 JP 5132435B2 JP 2008159326 A JP2008159326 A JP 2008159326A JP 2008159326 A JP2008159326 A JP 2008159326A JP 5132435 B2 JP5132435 B2 JP 5132435B2
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water
buoyancy
water stop
sheet pile
steel sheet
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JP2010001615A (en
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光明 宮田
浩一朗 山田
晴喜 谷口
圭一 北角
正一 鈴木
勝之 池信
光志 平下
敬 熊▲崎▼
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株式会社アイ・エイチ・アイ・アムテック
深田サルベージ建設株式会社
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本発明は、港湾の岸壁や護岸等における水中構造物として鋼製矢板を使用した構造物、すなわち鋼製矢板構造物の検査、清掃、補修、補強工事等の補修関連作業用の空間を確保するための止水箱を鋼製矢板構造物の表面に取り付け設置する方法と、これに使用する止水箱に関するものである。   The present invention secures a space for repair-related work such as inspection, cleaning, repair, reinforcement work, etc. of a structure using a steel sheet pile as an underwater structure at a harbor quay or revetment. It is related with the method of attaching and installing the water stop box for steel on the surface of a steel sheet pile structure, and the water stop box used for this.

港湾の岸壁等において水中構造物として鋼製矢板を使用した鋼製矢板構造物は、竣工後、かなりの年月が経過したものが多くて老朽化しており、その劣化状態に適した補修、補強工事が必要になる。特に、腐蝕や損傷の多い干満帯や飛沫帯等の鋼製矢板構造物の気液変動部での検査、補修、補強工事においては、従来のダイバーによる水中工事は困難であることから、気中工事を可能にできるように海水の影響を受けない所定の作業空間を確保することが望まれ、その要望に応えるために、前面開放形の止水箱を鋼製矢板構造物に当接させて所定の作業空間を確保する工法が開発され提案されている。   Steel sheet pile structures that use steel sheet piles as underwater structures on the quay of a port, etc., have been aged for many years after completion, and are repaired and reinforced according to their deteriorated state. Construction is required. In particular, it is difficult to perform underwater construction using conventional divers in the inspection, repair, and reinforcement work of steel sheet pile structures such as corroded and damaged strips, which are often corroded and damaged, in the gas-liquid fluctuation area. It is desirable to secure a predetermined working space that is not affected by seawater so that construction can be performed. In order to meet this demand, a water-stop box with an open front is brought into contact with the steel sheet pile structure to determine the predetermined space. A construction method to secure a working space has been developed and proposed.

例えば、下記の特許文献1には、前面が開放形状をなす止水箱の底板部の前端部及び両側板部の前端部に、鋼製矢板に対して当接するチューブ状のシール材を設けておいて、該シール材を鋼製矢板に当接させて止水箱と鋼製矢板の間を止水し、所定の作業空間を保有することが提案されており、その設置のために、岸壁近くの陸上に仮設した支持台に懸垂棹をピン連結し、該懸垂棹により前記止水箱を懸垂状に支持し、該懸垂棹の回動により前記止水箱を海側に降ろして鋼製矢板構造物に当接させて取り付けることが示されている。   For example, in Patent Document 1 below, a tube-shaped sealing material that comes into contact with a steel sheet pile is provided at the front end portion of the bottom plate portion and the front end portions of both side plate portions of the water stop box whose front surface is open. It is proposed that the sealing material is brought into contact with the steel sheet pile to stop water between the water stop box and the steel sheet pile, and that a predetermined work space is maintained. A suspension rod is pin-connected to a support base temporarily installed on land, the water stop box is supported in a suspended shape by the suspension rod, and the water stop box is lowered to the sea side by rotation of the suspension rod to form a steel sheet pile structure. It is shown to be mounted in contact.

また、特許文献2には、前面が開放形状をなす止水箱の底板部及び両側板部の前端部にそれぞれゴム材や発泡樹脂等の弾性体を装着しておいて、該弾性体を鋼製矢板の表面に当接させることで止水箱と鋼製矢板の間を止水し、所定の作業空間を保有することが提案され、その設置のために、該止水箱をクレーン等の起重機により吊り下げて海側に降ろして取り付けることが示されている。   In Patent Document 2, elastic bodies such as rubber material and foamed resin are respectively attached to the bottom plate portion and the front end portions of both side plate portions of the water stop box whose front surface is open, and the elastic bodies are made of steel. It is proposed that the water stop box and the steel sheet pile be stopped by abutting against the surface of the sheet pile, and that a predetermined work space is retained, and the water stop box is suspended by a crane or other hoist for the installation. It is shown to be lowered and mounted on the sea side.

このように、従来工法においては、前記止水箱を岸壁近くの陸部に設置したアーム式懸垂装置やクレーン等により吊り下げて海側に降ろし、これを岸壁の鋼製矢板構造物に当接させるように操作して取り付けて設置している。
実開昭62−163532号公報 特開2003−212186号公報
Thus, in the conventional construction method, the water stop box is suspended by an arm-type suspension device or crane installed in the land near the quay and lowered to the sea side, and this is brought into contact with the steel sheet pile structure on the quay. It is operated and installed as follows.
Japanese Utility Model Publication No. 62-163532 JP 2003-212186 A

陸上の起重機等を利用する従来の設置の方法では、岸壁近くの陸部に懸垂装置や起重機等を設置する必要があり、これらの工事用機材の設置に十分に耐える強度が要求されるが、港湾の陸部表面のコンクリート等の舗装部分も劣化が進行していて、前記起重機等の工事用機材の設置に必要とされる強度を保持できず、前記機材を設置できない場合がある。また、作業対象となる港湾の岸壁に近接して防潮堤が設けられていて、陸上部に起重機等の工事用機材を搬入・設置するスペースを確保するのが困難な場合も多い。さらに、岩場等の起伏の激しい地形の場合にも、前記機材を搬入・設置するのが困難な場合がある。仮に、狭小なスペースしかなくて前記工事用機材を設置できない場合には、前記止水箱を取り付ける作業が困難になる。   In the conventional installation method using on-shore hoist, etc., it is necessary to install a suspension device, hoist, etc. on the land near the quay, and it is required to have sufficient strength to withstand the installation of these construction equipment. The pavement part such as concrete on the surface of the land portion of the harbor is also deteriorated, and the strength required for installation of construction equipment such as the hoist cannot be maintained, and the equipment may not be installed. In addition, there are often seawalls close to the quay of the port to be worked on, and it is often difficult to secure a space for carrying construction equipment such as hoists on the land. Furthermore, it may be difficult to carry in and install the equipment even in the case of rocky terrain. If the construction equipment cannot be installed because there is only a small space, it is difficult to attach the water stop box.

また、陸上からの起重機等による吊り下げ方式では、鋼製矢板構造物の表面と止水箱の相対的な関係が起重機の操作位置から確認できないため、作業上の安全面での不安要素となり、それだけ水中のダイバーの負担が大きくなる。さらに、工事範囲の規模によっては、工事の進捗により前記止水箱の設置個所を移動させる必要があるが、この止水箱の設置個所の移動に合わせて、起重機等の工事用機材の設置個所も同時に移動させる必要があり、その移動のための労力が大きくなる。   Also, with the suspension method using a hoist from the land, the relative relationship between the surface of the steel sheet pile structure and the water stop box cannot be confirmed from the operation position of the hoist, which is an uneasy factor in terms of work safety. The burden on divers in the water increases. Furthermore, depending on the scale of the construction area, it may be necessary to move the installation location of the water stop box as the construction progresses. It is necessary to move, and the labor for the movement becomes large.

また、クレーン等の起重機を備える専用の作業船を使用して、海上からの起重機の操作で止水箱を鋼製矢板構造物の表面に当接させて取り付けて設置することも考えられているが、この専用の作業船を使用する場合は、対象とする鋼製矢板構造物を備える岸壁付近まで作業船が入り込める十分に大きな水路が必要であり、作業船が通れない比較的狭隘な水路が存する場合、該水路より内方の岸壁には利用できない。   In addition, it is also considered to use a dedicated work ship equipped with a hoist such as a crane, and install the water stop box in contact with the surface of the steel sheet pile structure by operating the hoist from the sea. When using this dedicated work ship, there must be a sufficiently large water channel that allows the work ship to enter the quay near the target steel sheet pile structure, and there is a relatively narrow water channel through which the work ship cannot pass. In this case, it cannot be used on the quay inside the waterway.

さらに、止水箱設置のための支援設備として、陸上に設置した起重機等の機材を使用する場合、あるいは専用の作業船を用いる場合のいずれにおいても、これらの支援設備のために莫大な費用が必要になると言った問題がある。   In addition, as a support facility for installing a water stoppage box, enormous costs are required for these support facilities, whether using equipment such as a hoist installed on land or using a dedicated work boat. There is a problem that said.

本発明は、上記の問題点を解決するためになしたものであり、老朽化した鋼製矢板構造物の検査、補修、補強工事等の補修関連作業に際して、作業空間を確保するための止水箱を鋼製矢板構造物の表面に取り付け設置する方法として、特に、前記止水箱自体を海面に浮かせて曳行できる構造にして、比較的狭隘な水路より内方の港湾内にも曳行して持ち込むことができ、しかも起重機や専用の作業船のような大がかりな支援設備や機材を使用せずとも、該止水箱を所定の姿勢及び深度に保持して鋼製矢板構造物の表面に当接させて取り付けて設置することができ、取り付け作業を能率よく行える、止水箱の設置方法及び止水箱を提供するものである。   The present invention has been made in order to solve the above-described problems, and is a water stop box for securing a work space for repair-related work such as inspection, repair, and reinforcement work of an old steel sheet pile structure. As a method of installing and installing the steel sheet pile structure on the surface of the steel sheet pile structure, in particular, make the water stop box itself floatable on the sea surface, and carry it into the harbor inside the relatively narrow waterway. Even without using large support equipment or equipment such as a hoist or a dedicated work boat, the water stop box is held in a predetermined posture and depth and brought into contact with the surface of the steel sheet pile structure. The present invention provides a water-stop box installation method and a water-stop box that can be installed and installed, and that can be installed efficiently.

本発明の止水箱の設置方法は、鋼製矢板構造物を備える岸壁において、前記鋼製矢板構造物の補修関連作業に際して、作業空間を確保するための前面開放形の止水箱を鋼製矢板構造物の表面に取り付け設置する方法であって、上記の課題を解決するために、前記止水箱の底板部、後板部および両側板部の外面に、それぞれ空気と水が給排可能な浮力タンクを付設しておいて、該止水箱を、各浮力タンクの空気と水の給排による浮力調整により、前面を上に向けるように傾倒姿勢にして海面に浮かせて設置予定個所の鋼製矢板構造物の前方へ曳行し、該鋼製矢板構造物の前方において浮力タンクの浮力調整により該止水箱を竪姿勢にするとともに深度を調整して、該止水箱の前面を鋼製矢板構造物に対向させ、該止水箱を鋼製矢板構造物の表面に引き寄せ当接させて取り付けることを特徴とする。
The water stop box installation method of the present invention is a steel sheet pile structure in which a front open water stop box for securing a work space is provided for repair work related to the steel sheet pile structure in a quay equipped with a steel sheet pile structure. In order to solve the above problems, a buoyancy tank capable of supplying and discharging air and water to the outer surfaces of the bottom plate portion, the rear plate portion, and the both side plate portions of the water stop box , respectively. sure it attached to, the water stop box by buoyancy by air and water supply and discharge of the buoyancy tanks, steel sheet pile installation plan point float on the sea surface in the inclined posture to direct upward the front structure and towed to the front of the object, in front of the steel-made sheet pile structure, by adjusting the depth while the vertical posture該止water box by buoyancy of the buoyancy tank, the front face of該止water box to a steel sheet pile structure The water stop box is made to face the surface of the steel sheet pile structure. It is brought into contact drawn to wherein the attaching.

この止水箱の設置方法によれば、止水箱自体を海面に浮かせることで、港湾内等の任意の岸壁の個所に曳行することができ、例えば比較的狭隘な水路でも小型船で曳行できて、該水路より内方の比較的狭い港湾内の個所にも止水箱を持ち込み設置することができる。しかも、前記浮力タンクの浮力調整により前記止水箱の姿勢及び深度を容易に調整でき、またそのために止水箱の前面を鋼製矢板構造物と対向させるのも容易になる。そのため、専用の作業船や起重機等の大がかりな支援設備を使用せずに、前記止水箱を、例えば鋼製矢板構造物との間に設けた牽引手段等により該鋼製矢板構造物の側に引き寄せることにより、鋼製矢板構造物の表面に対し所定の深度位置に取り付けることができる。   According to the installation method of this water stop box, by floating the water stop box itself on the sea surface, it is possible to coast to any quay part in the harbor, etc. A water stop box can be brought in and installed at a location in a relatively narrow harbor inside the water channel. In addition, the attitude and depth of the water stop box can be easily adjusted by adjusting the buoyancy of the buoyancy tank, and for this purpose, it is easy to make the front face of the water stop box face the steel sheet pile structure. Therefore, without using a large-scale support facility such as a dedicated work boat or a hoist, the water stop box is placed on the steel sheet pile structure side by traction means provided between the steel sheet pile structure, for example. By pulling, it can be attached to a predetermined depth position with respect to the surface of the steel sheet pile structure.

特に、前記止水箱の底板部、後板部および両側板部の外面に、それぞれ空気と水が給排可能な浮力タンクが付設されており、各浮力タンクの空気と水の給排による浮力調整により、曳行時は前面を上に向けるように傾倒姿勢にして浮かせ、さらに設置予定個所の鋼製矢板構造物の前方において、該止水箱を竪姿勢にするとともに深度を調整して該止水箱の前面を鋼製矢板構造物に対向させることができるので、前記止水箱を鋼製矢板構造物の表面に対し所定の深度位置に調整して取り付けることができる。
In particular, buoyancy tanks capable of supplying and discharging air and water are respectively attached to the outer surfaces of the bottom plate portion, rear plate portion and both side plate portions of the water stop box, and buoyancy adjustment by supplying and discharging air and water in each buoyancy tank Therefore, when coasting, it floats in a tilted position with the front side facing up, and in front of the steel sheet pile structure where the installation is to be made, Since the front surface can be opposed to the steel sheet pile structure, the water stop box can be adjusted and attached to the surface of the steel sheet pile structure at a predetermined depth.

前記の設置方法に使用する本発明の止水箱は、水中の鋼製矢板構造物に当接させて作業空間を形成するための止水箱で、底板部、後板部および両側板部により前面及び上面が開放形をなすように形成され、前記底板部及び両側板部の前端部にそれぞれ鋼製矢板構造物の壁面に当接する止水用の弾性体が装着されてなる止水箱において、前記底板部、後板部および両側板部の外面に、それぞれ空気と水との給排により浮力調整が可能な浮力タンクが付設され、各浮力タンクの浮力調整により、曳行時は前面を上に向けるように傾倒姿勢にして海面に浮かせることができ、かつ設置予定個所の鋼製矢板構造物の前方では、該止水箱を竪姿勢にして深度を調整できるように設けられてなることを特徴とする。
The water stop box of the present invention used in the above installation method is a water stop box for forming a work space by abutting against an underwater steel sheet pile structure, and includes a front plate and a rear plate portion and both side plate portions. In the water stop box, the bottom plate is formed such that an upper surface is formed in an open shape, and a water stop elastic body abutting against the wall surface of the steel sheet pile structure is attached to the front end portions of the bottom plate portion and the both side plate portions, respectively. A buoyancy tank that can be adjusted for buoyancy by supplying and discharging air and water is attached to the outer surfaces of the front, rear, and both side plate sections, and the front of the buoyancy tank faces upward when coasting by adjusting the buoyancy of each buoyancy tank. It is characterized by being provided so as to be able to float on the sea surface in a tilted position and to adjust the depth in front of the steel sheet pile structure to be installed in a standing position .

この止水箱を使用することにより、各浮力タンクの浮力調整により、止水箱を海面に浮かせて前面を上に向けるように傾倒させ抵抗を少なくした状態で設置予定個所近くの海面まで容易に曳行でき、しかも、設置予定個所の前方において所定の姿勢及び深度に調整して鋼製矢板構造物の表面に取り付けることができ、上記の本発明の設置方法を好適にかつ容易に実施できる。
By using this water stopping box, the buoyancy of the buoyancy tanks, easily front float water stopping box to sea level until tilting is allowed nearby installation will place the resistor at least in a state in sea surface to direct upward towed In addition, it can be adjusted to a predetermined heel posture and depth in front of the planned installation location and attached to the surface of the steel sheet pile structure, and the above-described installation method of the present invention can be suitably and easily performed.

前記の止水箱において、前記後板部および両側板部に付設された浮力タンクには、それぞれタンク上部に空気給排用の弁付き口部が、タンク下部に給排水用の弁付き口部が設けられ、竪姿勢において浮力調整可能に設けられてなるものが好ましい。これにより、例えば、浮力を上げるときは、タンク内の水を下部の給排水用口部から排出するのと同時に、上部の給排気用口部から空気を給入し、また浮力を低下させるときは、上部の空気給排用口部から空気を排出しながら下部の給排水用口部から水を給入することにより、タンク内の空気と水の置き換えによる浮力調整を容易に行うことができる。   In the water stop box, each of the buoyancy tanks attached to the rear plate portion and the both side plate portions is provided with a valve-equipped port for supplying and discharging air at the upper part of the tank and a valve-equipped port for supplying and discharging water at the lower part of the tank. It is preferable that the buoyancy can be adjusted in the heel posture. Thus, for example, when raising the buoyancy, drain water from the lower water supply / drainage port at the same time as supplying air from the upper air supply / exhaust port and lowering the buoyancy. By supplying water from the lower water supply / drainage port while discharging air from the upper air supply / discharge port, it is possible to easily adjust the buoyancy by replacing the air and water in the tank.

前記の止水箱において、前記後板部および両側板部に付設された浮力タンクは、空気充填時の浮力が上部側ほど大きくなる形状の内部室が形成されてなるものが好ましい。これにより、止水箱の上部側を上にして傾倒させた状態に保持して海面に浮かべることができ、曳行時の抵抗を小さくし安定性をよくすることができる。   In the water stop box, it is preferable that the buoyancy tank attached to the rear plate portion and the both side plate portions is formed with an internal chamber having a shape in which the buoyancy at the time of air filling increases toward the upper side. Thereby, it can hold | maintain in the state inclined with the upper side of the water stop box up, and it can float on the sea surface, can reduce the resistance at the time of coasting, and can improve stability.

前記底板部、後板部および両側板部に付設された各浮力タンクは、内部室が複数の室に画成され、各室毎に空気及び水の給排が可能に設けられてなるものが好ましい。これにより各浮力タンクの浮力を止水箱の形態や姿勢に応じて適宜調整でき、海面に安定性よく浮かせて曳行できる。   Each buoyancy tank attached to the bottom plate portion, the rear plate portion, and the both side plate portions has an internal chamber defined in a plurality of chambers, and each chamber is provided so as to be able to supply and discharge air and water. preferable. As a result, the buoyancy of each buoyancy tank can be adjusted as appropriate according to the form and posture of the water stop box, and can float while stably floating on the sea surface.

また、前記止水箱の上端部に、該上端部の水没を抑制する浮力タンクが設けられてなるものが好ましい。   Further, it is preferable that a buoyancy tank that suppresses submergence of the upper end portion is provided at the upper end portion of the water stop box.

上記したように、本発明の止水箱の設置方法及び止水箱によれば、老朽化した鋼製矢板構造物の検査、清掃、補修、補強工事等の補修関連工事を施工する場合において、前記止水箱を設置する際、前記止水箱自体を海面に浮かべて小型船等で曳行して岸壁の任意の設置予定個所の近くまで容易に持ち込むことができる。例えば、小型船や止水箱が航行できれば、比較的狭い港湾内にも容易に曳行して持ち込むことができる。しかも、浮力調整により海面に浮かせた止水箱の姿勢及び深度を調整することができるため、作業船や起重機等の大がかりな支援設備を使用せずに、該止水箱を所定の深度に調整して鋼製矢板構造物に対向させて取り付けることができる。   As described above, according to the water-stop box installation method and water-stop box of the present invention, when performing repair-related work such as inspection, cleaning, repair, reinforcement work, etc. of an old steel sheet pile structure, When installing a water box, the water stop box itself can be floated on the sea surface and coasted with a small boat or the like, and can be easily brought to any place near the planned installation site on the quay. For example, if a small ship or a water stop box can navigate, it can be easily coasted and brought into a relatively small harbor. Moreover, since the attitude and depth of the water-stopping box floating on the sea surface can be adjusted by adjusting the buoyancy, the water-stopping box can be adjusted to a predetermined depth without using a large support facility such as a work boat or a hoist. It can be attached to the steel sheet pile structure.

さらに、本発明によれば、作業空間を確保するための止水箱を、海面に浮かせて海側からの作業で容易に設置できるので、前記止水箱の設置時間を大幅に短縮でき、また、岸壁近くの陸部が岩場等の起伏の激しい地形であったり、狭小なスペースしかない場合であっても、前記止水箱を問題なく取り付け設置できる。そのため、止水箱を取り付け使用する場合の作業時間及び労力を大幅に削減でき、ひいては鋼製矢板構造物の補修作業の効率化、合理化、低コスト化を図ることができる。   Furthermore, according to the present invention, since the water stop box for securing the work space can be easily installed by floating from the sea surface and working from the sea side, the installation time of the water stop box can be greatly reduced, and the quay Even if the nearby land is a rough terrain such as a rocky place or there is only a small space, the water stop box can be installed and installed without any problem. Therefore, the work time and labor when the water stop box is attached and used can be greatly reduced, and the efficiency, rationalization, and cost reduction of the repair work of the steel sheet pile structure can be achieved.

次に、本発明の実施の形態を図面に示す実施例に基づいて説明する。   Next, embodiments of the present invention will be described based on examples shown in the drawings.

図1は、本発明の実施に使用する止水箱の概略斜視図、図2は同上の止水箱の背面側からの斜視図、図3は同止水箱の平面図、図4は前図のIV−IV線の断面図、図5A及び図5Bは後板部の浮力タンクの浮力調整状態の略示説明図、図6は側板部の浮力タンクの浮力調整状態の略示説明図、図7は後板部の浮力タンクの変更例を示す略示説明図、図8は側板部の浮力タンクの変更例を示す略示説明図、図9〜図11は止水箱の姿勢制御状態の説明図、図12は止水箱の設置状態の断面図である。   FIG. 1 is a schematic perspective view of a water stop box used in the practice of the present invention, FIG. 2 is a perspective view from the back side of the water stop box, FIG. 3 is a plan view of the water stop box, and FIG. 5A and 5B are schematic illustrations of the buoyancy adjustment state of the buoyancy tank of the rear plate portion, FIG. 6 is a schematic illustration of the buoyancy adjustment state of the buoyancy tank of the side plate portion, and FIG. FIG. 8 is a schematic explanatory view showing a modification example of the buoyancy tank of the rear plate part, FIG. 8 is a schematic explanatory view showing a modification example of the buoyancy tank of the side plate part, and FIGS. 9 to 11 are explanatory views of the posture control state of the water stop box, FIG. 12 is a cross-sectional view of the water stop box installed.

図において、Aは本発明の設置方法の実施に使用する止水箱である。この止水箱Aは、平面矩形の底板部2と、該底板部2の後端部に連結された後板部3と、該底板部2の両側に連結されかつ前記後板部3に連結された両側板部4,4とにより、岸壁50における鋼製矢板構造物51との対向側になる前面及び上面が開放形をなす箱本体1が構成されてなる。   In the figure, A is a water stop box used for carrying out the installation method of the present invention. The water stop box A is connected to the bottom plate portion 2 having a rectangular plane, the rear plate portion 3 connected to the rear end portion of the bottom plate portion 2, the both sides of the bottom plate portion 2, and the rear plate portion 3. The box body 1 having an open front surface and an upper surface that are opposite to the steel sheet pile structure 51 in the quay wall 50 is configured by the both side plate portions 4 and 4.

前記底板部2、後板部3及び両側板部4,4は、それぞれ鋼材等よりなる枠や桟等を骨組にしてその内外に鉄板等を張り付けた二重壁構造をなしているが、後述する浮力タンクの付設構造を考慮して、骨組に1枚の板材を張り付けて構成することもできる。いずれにしても、前記底板部2、後板部3及び両側板部4,4は、相互に溶接手段等により一体に連結され、該連結部分からは水が浸入しないように構成される。なお、図の場合は、前記箱本体1の下部の本体部1aの上に、上部体1bがボルト締結手段等により締結されることにより、止水箱として必要な高さを保有するように構成されており、該上部体1bの両側板部4b,4bの前端部の上部には、岸壁50における前方に張り出した突縁部50aに対応する切欠部4c、4cが設けられている。   The bottom plate portion 2, the rear plate portion 3, and the both side plate portions 4 and 4 each have a double wall structure in which a frame or crosspiece made of steel or the like is used as a framework and an iron plate or the like is attached to the inside or outside of the frame. In consideration of the attached structure of the buoyancy tank, a single plate material can be attached to the frame. In any case, the bottom plate portion 2, the rear plate portion 3, and the side plate portions 4 and 4 are integrally connected to each other by welding means or the like, and are configured so that water does not enter from the connection portion. In the case of the figure, the upper body 1b is fastened by a bolt fastening means or the like on the lower body portion 1a of the box body 1 so as to have a necessary height as a water stop box. In the upper part of the front end portions of the both side plate portions 4b, 4b of the upper body 1b, notches 4c, 4c corresponding to the protruding edge portions 50a of the quay wall 50 are provided.

前記底板部2の前端部は、鋼製矢板構造物51の表面の凹部51aと凸部51bに略対応する凹凸形状をなしている。2aは前記凹部51aに嵌合する突出部分を示している。前記両側板部4,4は、前記底板部2の前端部が鋼製矢板構造物51に対し凹凸形状に対応して当接するときに、前記両側板部4,4の前端部が鋼製矢板構造物51の凹部51aの内底面に当接するように形成され、前記底板部2の凹凸形状をなす前端部の突出部分2aと同程度突出している。前記両側板部4,4の前端部が、鋼製矢板構造物51の凸部51bの面に当接するように形成しておくこともできるが、当接時の安定性の点からは凹部51aの内底面に当接するように設けておくのが望ましい。   The front end portion of the bottom plate portion 2 has a concavo-convex shape substantially corresponding to the concave portion 51 a and the convex portion 51 b on the surface of the steel sheet pile structure 51. Reference numeral 2a denotes a protruding portion that fits into the recess 51a. When the front end portion of the bottom plate portion 2 comes into contact with the steel sheet pile structure 51 corresponding to the uneven shape, the front end portions of the side plate portions 4 and 4 are steel sheet piles. It is formed so as to be in contact with the inner bottom surface of the recess 51 a of the structure 51, and protrudes to the same extent as the protruding portion 2 a of the front end portion that forms the concavo-convex shape of the bottom plate portion 2. The front end portions of the both side plate portions 4 and 4 may be formed so as to abut against the surface of the convex portion 51b of the steel sheet pile structure 51. However, in terms of stability at the time of abutment, the concave portion 51a is used. It is desirable to provide it so that it may contact | abut to the inner bottom face.

通常、これらの底板部2及び左右両側板部4,4の前端部には、それぞれ鋼製矢板構造物51に対する当接時の緩衝及び気密性保持のために弾性体25及び45が付設されている。これらの弾性体25及び45は、通常のゴム材のほか、スポンジ状ゴム材や中空のチューブ状物を利用することもできる。前記底板部2における前端部の凹凸形状における突出部分2aについては、その周縁部に前記弾性体25を凸部51bの前面に当接する部分に連続して設けておくほか、該突出部分2aの全体を、弾性係数の異なる複数枚のゴム板を重ね合わせた弾性体、その他の弾力性を有する弾性体により形成し、鋼製矢板構造物51の凹部51aに対し弾力的に押し込めるように形成しておくこともできる。   Usually, elastic bodies 25 and 45 are attached to the front end portions of the bottom plate portion 2 and the left and right side plate portions 4 and 4 for buffering and maintaining airtightness when contacting the steel sheet pile structure 51, respectively. Yes. As these elastic bodies 25 and 45, a sponge rubber material or a hollow tube-like material can be used in addition to a normal rubber material. About the protrusion part 2a in the uneven | corrugated shape of the front-end part in the said baseplate part 2, the said elastic body 25 is continuously provided in the peripheral part to the part contact | abutted to the front surface of the convex part 51b, and this protrusion part 2a whole Is formed of an elastic body in which a plurality of rubber plates having different elastic coefficients are overlapped, or another elastic body having elasticity, and is formed so as to be elastically pushed into the concave portion 51a of the steel sheet pile structure 51. It can also be left.

なお、前記鋼製矢板構造物51の凹凸形状は、Z型やU型等の鋼製矢板の種類によって異なるので、前記底板部2の前端部の凹凸形状についても、前記鋼製矢板構造物51の形状に応じてそれぞれに適した形状に形成される。   In addition, since the uneven | corrugated shape of the said steel sheet pile structure 51 changes with kinds of steel sheet piles, such as Z type and U type, also about the uneven | corrugated shape of the front-end part of the said bottom plate part 2, the said steel sheet pile structure 51 is. It is formed in a shape suitable for each according to the shape.

符号5は、前記箱本体1の内部の前記底板部2上に設置した作業用床体で、枠体に多孔板等の網状体を張設して形成したものからなる。符号6は前記箱本体1内の前記床体5の下部に浸入した水を排水するための排水ポンプ、符号7は前記排水ポンプ6に接続された排水管、8は前記箱本体1を保持しかつ岸壁50の鋼製矢板構造物51の側に引き寄せるためのレバーブロック等の牽引手段や連結部材9を係止するための係止部である。このほか、必要に応じて、両側板部4,4の上端部等の所要の個所に、クレーン等による吊り下げ用の係止部(図示せず)も設けられる。   Reference numeral 5 is a working floor body installed on the bottom plate portion 2 inside the box body 1 and is formed by stretching a net-like body such as a perforated plate on a frame body. Reference numeral 6 denotes a drainage pump for draining water that has entered the lower part of the floor body 5 in the box body 1, reference numeral 7 denotes a drain pipe connected to the drainage pump 6, and 8 denotes a holder for holding the box body 1. And it is a latching part for latching traction means, such as a lever block, and the connection member 9 for drawing near to the steel sheet pile structure 51 side of the quay 50. In addition, if necessary, a suspension portion (not shown) for suspension by a crane or the like is provided at a required portion such as the upper end portions of the side plate portions 4 and 4.

前記止水箱Aの箱本体1における底板部2、後板部3及び両側板部4,4の外面には、それぞれ浮力調整が可能な浮力タンク20、30及び40,40が付設されており、各浮力タンク20、30及び40の浮力調整により、海面に浮かせることができるように設けられ、さらに浮力調整を利用して、海面に浮かせた状態の姿勢及び深度を調整できるように設けられている。前記底板部2の浮力タンク20については、前記鋼製矢板構造物51の凹部51aに嵌まり込む突出部分2aを除く領域の下面に設けられ、また両側板部4,4の浮力タンク40についても、前記底板部2の浮力タンク20と同様に、鋼製矢板構造物51の凹部51aに嵌まり込む前端部を除く領域の外面に設けられている。   Buoyancy tanks 20, 30 and 40, 40 capable of adjusting buoyancy are attached to the outer surfaces of the bottom plate portion 2, the rear plate portion 3, and the side plate portions 4, 4 in the box body 1 of the water stop box A, respectively. It is provided so that it can float on the sea surface by adjusting the buoyancy of each of the buoyancy tanks 20, 30 and 40. Further, it is provided so that the attitude and depth of the state floated on the sea surface can be adjusted using buoyancy adjustment. . About the buoyancy tank 20 of the said bottom plate part 2, it is provided in the lower surface of the area | region except the protrusion part 2a fitted in the recessed part 51a of the said steel sheet pile structure 51, and also about the buoyancy tank 40 of the both-sides board parts 4 and 4. Like the buoyancy tank 20 of the bottom plate portion 2, the bottom plate portion 2 is provided on the outer surface of the region excluding the front end portion that fits into the recess 51 a of the steel sheet pile structure 51.

前記各浮力タンク20、30及び40の浮力調整の手段としては、種々の実施が可能であるが、本発明では、各浮力タンク20、30及び40について、それぞれ空気と水の給排が可能に設けられ、この空気と水の給排により浮力調整できるように設けられる。そのため、前記各浮力タンク20、30及び40には、それぞれ空気及び水の給排用口部が設けられる。 Various means can be used as means for adjusting the buoyancy of each of the buoyancy tanks 20, 30 and 40. In the present invention, air and water can be supplied to and discharged from the buoyancy tanks 20, 30 and 40, respectively. It is provided so that buoyancy can be adjusted by supplying and discharging air and water. Therefore, the buoyancy tanks 20, 30 and 40 are provided with air and water supply / discharge ports, respectively.

例えば、前記後板部3及び側板部4の各浮力タンク30及び40には、空気給排用の弁付き口部31及び41と、水(海水)を給排できる給排水用の弁付き口部32及び42が設けられ、内部に空気を充填することにより各タンクの浮力を最大に保持でき、また、前記内部の空気に置き換えて水を給入することにより、浮力を漸次低下させることができるようになっている。底板部2の浮力タンク20についても、図示は省略しているが、前記同様の空気給排用の弁付き口部及び給排水用の弁付き口部が設けられる。   For example, each of the buoyancy tanks 30 and 40 of the rear plate portion 3 and the side plate portion 4 has valve-equipped ports 31 and 41 for supplying and discharging air and a valve-equipped port for supplying and discharging water (seawater). 32 and 42 are provided, and the buoyancy of each tank can be kept at the maximum by filling the inside with air, and the buoyancy can be gradually reduced by supplying water instead of the inside air. It is like that. Although not shown, the buoyancy tank 20 of the bottom plate portion 2 is also provided with a valve-equipped mouth portion for supplying and discharging air and a valve-equipped mouth portion for supplying and discharging water similar to those described above.

特に、後板部3及び両側板部4,4の浮力タンク30及び40における空気給排用の弁付き口部31及び41はタンク上部に、また給排水用の弁付き口部32及び42はタンク下部に設けられており、例えば、浮力を上げるときは、図5A及び図6のように、タンク内の水を下部の給排水用の口部32及び42から排出するのと同時に、上部の空気給排用の口部31及び41から空気を給入し、また浮力を低下させるときは、図5Bのように上部の空気給排用の口部31及び41から空気を排出しながら下部の給排水用の口部32及び42から水を給入できるように設けられており、竪姿勢において空気と水の置き換えによる浮力調整を容易に行えるようになっている。   In particular, the valve-equipped port portions 31 and 41 for air supply / discharge in the buoyancy tanks 30 and 40 of the rear plate portion 3 and the side plate portions 4 and 4 are the tank upper portion, and the valve-equipped port portions 32 and 42 for water supply / drainage are the tanks. For example, when raising the buoyancy, as shown in FIGS. 5A and 6, the water in the tank is discharged from the lower water supply / drainage ports 32 and 42 and at the same time the upper air supply When supplying air from the exhaust ports 31 and 41 and lowering the buoyancy, as shown in FIG. 5B, while discharging air from the upper air supply and exhaust ports 31 and 41, It is provided so that water can be supplied from the mouth portions 32 and 42, and the buoyancy adjustment by the replacement of air and water can be easily performed in the heel posture.

なお、前記の空気及び水の給排には必要に応じてポンプ手段を利用する。特に空気の給入にはポンプ手段を利用するのが好ましい。   In addition, a pump means is utilized for supply and discharge of the air and water as necessary. In particular, it is preferable to use pump means for air supply.

前記後板部3及び両側板部4,4には、安全装置として、開閉弁付きのオーバーフロー用管33及び43が設けられ、水を給入する際に、一定以上の水量の給入を抑制するように設けられている。その手段として、図示する実施例の場合は、空気給排用の弁付き口部31,41を、通常状態において、空気の給入はできるが、排出を阻止できる逆止弁31a,41aを設けておき、これとは別に、上端から所要の高さ位置まで垂下したオーバーフロー管33及び43が設けられ、タンク内部への給水時には該オーバーフロー管33及び43の下端が水没するまでは、該オーバーフロー管33及び43の開閉弁33a及び43aを開にして、該オーバーフロー管33及び43を通じて排気することで給水でき、かつオーバーフロー管33及び43の下端が水没すると、上部空間の空気がある程度圧縮されるまで給水でき、かつそれ以上になるとオーバーフロー管33及び43を通じて排水されることで、一定以上の給水を阻止できるようになっている(図5A,B及び図6)。これにより、過剰に給水により浮力が低下して沈下するのを防止できるようになっている。また、空気の給入時には前記オーバーフロー管33,34の開閉弁33a,43aを閉にして、給排水用の弁付き口部32,42から水を排出しながら給入し充填する。一定量の給入が完了した後は給排水用の口部32,42を閉じて、給入した空気による浮力を確保する。   The rear plate portion 3 and the side plate portions 4 and 4 are provided with overflow pipes 33 and 43 with an on-off valve as a safety device to suppress the supply of a water amount above a certain level when water is supplied. It is provided to do. As the means, in the case of the illustrated embodiment, the valve-equipped ports 31 and 41 for supplying and discharging air are provided with check valves 31a and 41a that can supply air but prevent discharge in a normal state. Separately from this, overflow pipes 33 and 43 hanging from the upper end to a required height position are provided, and when the water is supplied into the tank, the overflow pipes 33 and 43 are submerged until the lower ends are submerged. By opening the on-off valves 33a and 43a of 33 and 43 and exhausting through the overflow pipes 33 and 43, water can be supplied, and when the lower ends of the overflow pipes 33 and 43 are submerged, the air in the upper space is compressed to some extent. Water can be supplied, and if it exceeds that, it will be drained through the overflow pipes 33 and 43 to prevent water supply above a certain level. Are I (Figure 5A, B and 6). Thereby, it can prevent that buoyancy falls and sinks by excessive water supply. Further, when air is supplied, the on-off valves 33a and 43a of the overflow pipes 33 and 34 are closed, and water is supplied and filled while discharging water from the valve-equipped ports 32 and 42 for water supply and drainage. After a certain amount of supply is completed, the water supply / drain ports 32 and 42 are closed to ensure buoyancy due to the supplied air.

前記のオーバーフロー管33及び43は、必ずしも必要ではなく、前記各弁付き口部31、41の開閉を制御することにより、内部の水量を設定できかつ浮力調整を行うこともできる。   The overflow pipes 33 and 43 are not always necessary. By controlling the opening and closing of the valve-equipped mouth portions 31 and 41, the amount of water inside can be set and buoyancy can be adjusted.

このほか、安全のために、エアバッグのように、インフレータガスを利用して急激に気体を給入できる安全装置を設けておくこともできる。   In addition, for safety, a safety device that can rapidly supply gas using an inflator gas, such as an airbag, can be provided.

前記後板部3および両側板部4,4に付設された浮力タンク30及び40は、通常の長方体形状をなすものとするほか、空気充填時の浮力が上部側ほど大きくなる形状、例えば図7及び図8のようにタンク表裏板間の間隔が上部側ほど大きくなるように形成しておくのが、海面に浮かせた状態において、止水箱1の上端部の側を上にして海面上に持ち上げた傾倒姿勢に保持することが容易に可能になり、好ましい。   The buoyancy tanks 30 and 40 attached to the rear plate portion 3 and the side plate portions 4 and 4 have a normal rectangular shape, and a shape in which the buoyancy at the time of air filling increases toward the upper side, for example, As shown in FIGS. 7 and 8, the space between the tank front and back plates is formed so as to increase toward the upper side. In the state of floating on the sea surface, the top end side of the water stop box 1 is on the sea surface. Therefore, it is possible to easily maintain the tilted posture lifted to the height, which is preferable.

前記底板部2、後板部3および両側板部4,4に付設された各浮力タンク20,30及び40は、図のような単一の内部室を有するタンクのほか、内部室を複数の室に区画形成して、各室毎に空気及び水の給排を可能に設けて実施することも、また複数のタンクを接合して構成し、各タンク毎に浮力調整できるように構成することもできる。この場合、各浮力タンク20,30及び40の浮力を、止水箱Aの形態や姿勢に応じて適宜調整でき、海面に安定性よく浮かせて曳行でき、かつ竪姿勢にするのも容易に可能になる。   Each of the buoyancy tanks 20, 30 and 40 attached to the bottom plate portion 2, the rear plate portion 3 and the both side plate portions 4 and 4 includes a tank having a single inner chamber as shown in FIG. It can be divided into chambers and air and water can be supplied and discharged for each chamber, or it can be constructed by joining multiple tanks so that buoyancy can be adjusted for each tank. You can also. In this case, the buoyancy of each of the buoyancy tanks 20, 30, and 40 can be adjusted as appropriate according to the form and posture of the water stop box A. Become.

前記の止水箱Aは、鋼製矢板構造物51を備える岸壁50が存する港湾等において、岸壁50に続く陸部のスペースが十分に広い場所、或いは専用の作業船から、クレーン等により海面に降ろして、該止水箱Aの外面に付設した浮力タンク20,30及び40の浮力により海面に浮かべ、該止水箱Aを小型船(図示せず)により港湾内等の岸壁50における任意の設置予定個所の鋼製矢板構造物51の前方近くまで曳行する。   In the harbor where the quay 50 provided with the steel sheet pile structure 51 exists, the water-stopping box A is lowered to the sea surface by a crane or the like from a place where a land space following the quay 50 is sufficiently wide or from a dedicated work ship. The buoyancy tanks 20, 30 and 40 attached to the outer surface of the water-stopping box A float on the sea surface, and the water-stopping box A is installed on a quay 50 such as in a harbor by a small ship (not shown). Coast to near the front of the steel sheet pile structure 51.

この際、前記各浮力タンク20,30及び40の浮力を適宜調整して、例えば、図9のように、前記止水箱Aの前面を上向きにしてかつ上端部を水没させずに傾倒姿勢に保持して、特に好ましくは底板部2の前端部が海面よりやや上方位置になるように保持して浮かべることにより、前記小型船による曳行時の抵抗を抑え、かつ安定性よく曳行できることになる。また、前記のように小型船で曳行できるため、前記止水箱A及び小型船が通過できる比較的狭い水路より内方にまで曳行して持ち込むことができる。   At this time, the buoyancy of each of the buoyancy tanks 20, 30 and 40 is adjusted as appropriate, for example, as shown in FIG. 9, with the front surface of the water stop box A facing upward and the tilted position maintained without submerging the upper end. Thus, particularly preferably, the front end of the bottom plate portion 2 is held and floated so as to be slightly above the sea surface, so that resistance during coasting by the small boat can be suppressed and coasting can be performed with high stability. Moreover, since it can be coasted with a small ship as mentioned above, it can be carried inward from the comparatively narrow water channel which the said water stop box A and a small ship can pass through.

前記止水箱Aを、岸壁50の設置予定個所の鋼製矢板構造物51の前方近くまで曳行した後、前記各浮力タンク20,30及び40のそれぞれの浮力を調整することにより、図10及び図11のように、前記止水箱Aを竪姿勢にするとともに、海面下に沈みこむ深度を、鋼製矢板構造物51における設置高さに対応するように調整する。例えば、底板部2に付設した浮力タンク20の空気排出、水の給入により浮力を小さくし、さらに後板部3に付設した浮力タンク30及び両側板部4、4に付設した浮力タンク40の浮力を大きくすることにより、作業用床体5や排水ポンプ6により重量が大きくなっている底板部2の側が沈下して竪姿勢にでき、さらに、この状態での各浮力タンク20,30,40の浮力調整により深度も調整できる。   10 and FIG. 10 by adjusting the buoyancy of each of the buoyancy tanks 20, 30, and 40 after laminating the water stop box A to near the front of the steel sheet pile structure 51 where the quay 50 is to be installed. 11, the waterstop box A is set in a dredging posture, and the depth of sinking under the sea surface is adjusted so as to correspond to the installation height in the steel sheet pile structure 51. For example, the buoyancy tank 20 attached to the bottom plate portion 2 is reduced in buoyancy by discharging air and supplying water, and the buoyancy tank 30 attached to the rear plate portion 3 and the buoyancy tank 40 attached to both side plate portions 4 and 4 By increasing the buoyancy, the side of the bottom plate 2 that has increased in weight due to the working floor 5 and the drainage pump 6 can sink to a dredged posture, and each buoyancy tank 20, 30, 40 in this state can be made. The depth can be adjusted by adjusting the buoyancy.

こうして、竪姿勢にした前記止水箱Aの前面を、設置予定個所の鋼製矢板構造物51に対し対向させて近づけ、ダイバー等が前記止水箱A及び鋼製矢板構造物51における設置個所を確認し位置合わせしながら、前記止水箱Aの前面、すなわち底板部2、両側板部4,4の前端部を前記鋼製矢板構造物51に対し当接させるとともに、該止水箱Aと鋼製矢板構造物51との間に架け渡した牽引手段、すなわち止水箱Aに有する係止部8と、鋼製矢板構造物51に予め取設したフック等の係止部との間に架け渡したチェーンブロックやレバーブロック等の牽引手段や連結部材9等により連結し、該連結部材9等により鋼製矢板構造物51に引きつけるようにする。   In this way, the front surface of the water stop box A in the saddle position is brought close to the steel sheet pile structure 51 where the installation is planned, and a diver confirms the installation location in the water stop box A and the steel sheet pile structure 51. While aligning, the front surface of the water stop box A, that is, the front end portions of the bottom plate portion 2 and the side plate portions 4 and 4 are brought into contact with the steel sheet pile structure 51, and the water stop box A and the steel sheet pile are brought into contact with each other. Traction means spanned between the structure 51, that is, a chain spanned between the locking portion 8 of the waterstop box A and a locking portion such as a hook previously installed in the steel sheet pile structure 51. They are connected by pulling means such as a block or a lever block, a connecting member 9 or the like, and attracted to the steel sheet pile structure 51 by the connecting member 9 or the like.

そして、前記止水箱A内の海水を排水ポンプ6で排出することにより、該止水箱Aに作用する水圧を利用して該止水箱Aの前端部を前記鋼製矢板構造物51の表面に対し強く密着させるようにして水密性を確保し、所定の作業空間を確保する(図12)。通常、この状態において、前記牽引手段により鋼製矢板構造物51に対し締結した状態に保持する。 このようにして、止水箱Aによる作業空間内での所定の補修関連作業が完了し、該止水箱Aの設置位置を、前記作業完了個所に続く作業予定個所に変更する場合は、前記牽引手段による鋼製矢板構造物51との連結を外して、各浮力タンク20,30及び40の浮力で前記竪姿勢で浮かせたまま鋼製矢板構造物51の表面から離し、そのまま次の補修対象個所に移動させて前記同様に鋼製矢板構造物の表面に対向させて牽引手段により鋼製矢板構造物51に引き寄せ当接させて取り付ければよく、大型のクレーン等を使用せずに設置位置を移動させることができる。やや離れた岸壁の鋼製矢板構造物の作業個所まで移動させる場合は、前記同様に小型船で曳行すればよい。   And by discharging the seawater in the water stop box A with the drainage pump 6, the front end of the water stop box A is made to the surface of the steel sheet pile structure 51 using the water pressure acting on the water stop box A. Water tightness is ensured by tightly adhering to a predetermined work space (FIG. 12). Normally, in this state, the steel sheet pile structure 51 is held in a state of being fastened by the pulling means. Thus, when the predetermined repair-related work in the work space by the water stop box A is completed, and the installation position of the water stop box A is changed to a planned work place following the work completion place, the traction means Is removed from the surface of the steel sheet pile structure 51 with the buoyancy of each of the buoyancy tanks 20, 30 and 40 left floating in the above-mentioned posture, and directly to the next repair target location. It is only necessary to move and install the steel sheet pile structure 51 so that the steel sheet pile structure 51 is attracted to and brought into contact with the steel sheet pile structure 51 by the traction means, and the installation position is moved without using a large crane or the like. be able to. When moving to a work place of a steel sheet pile structure on a slightly separated quay, it may be coasted with a small boat as described above.

このように、本発明の止水箱Aを用いることにより、鋼製矢板構造物51の補修作業のための作業空間を確保する止水箱Aの設置作業を、クレーン等の起重機や専用の大型の作業船を用いることなく、海面に浮かべた状態で設置でき、安全にかつ容易に作業でき、設置作業を効率化できる。さらに設置位置を変更する場合にも、海面に浮かべた状態で容易に移動できる。また、岸壁における陸部が岩場等の起伏の激しい地形であったり、狭小なスペースしかない場合であっても、海面を曳行して移動させることで、前記止水箱を所定の設置予定個所の鋼製矢板構造物に問題なく設置することができ、以て、鋼製矢板構造物の補修関連作業を効率化でき、作業費用の低減を図ることができる。   Thus, by using the water stop box A of the present invention, installation work of the water stop box A that secures a work space for repair work of the steel sheet pile structure 51 can be carried out by a hoist such as a crane or a dedicated large-scale work. It can be installed in a floating state without using a ship, can be operated safely and easily, and the installation work can be made more efficient. Furthermore, when changing the installation position, it can be easily moved while floating on the sea surface. In addition, even if the land on the quay is a rocky terrain or when there is only a narrow space, the waterstop box can be moved by coasting the sea surface to move the water stop box to a predetermined location. The sheet pile structure can be installed without any problem, so that the work related to the repair of the steel sheet pile structure can be made more efficient, and the work cost can be reduced.

本発明の止水箱の設置方法び止水箱は、港湾における岸壁の鋼製矢板構造物の検査、清掃、補修及び補強等の補修関連作業に好適に利用でき、また港湾以外の岸壁における鋼製矢板構造物の補修関連作業にも好適に利用できる。   The waterstop box installation method according to the present invention can be suitably used for repair-related work such as inspection, cleaning, repair and reinforcement of steel sheet pile structures on the quay at the harbor, and steel sheet piles at the quay other than the harbor. It can also be suitably used for work related to the repair of structures.

本発明において使用する止水箱の概略斜視図である。It is a schematic perspective view of the water stop box used in the present invention. 同止水箱の背面側からの斜視図である。It is a perspective view from the back side of the water stop box. 同止水箱の略示平面図である。It is a schematic plan view of the water stop box. 前図のIV−IV線における断面図である。It is sectional drawing in the IV-IV line of the previous figure. 後板部の浮力タンクの浮力調整状態の略示説明図である。It is a schematic explanatory drawing of the buoyancy adjustment state of the buoyancy tank of a rear board part. 後板部の浮力タンクの浮力調整状態の略示説明図である。It is a schematic explanatory drawing of the buoyancy adjustment state of the buoyancy tank of a rear board part. 側板部の浮力タンクの浮力調整状態の略示説明図である。It is a schematic explanatory drawing of the buoyancy adjustment state of the buoyancy tank of a side plate part. 後板部の浮力タンクの変更例を示す略示説明図である。It is a schematic explanatory drawing which shows the example of a change of the buoyancy tank of a rear-plate part. 側板部の浮力タンクの変更例を示す略示説明図である。It is a schematic explanatory drawing which shows the example of a change of the buoyancy tank of a side-plate part. 止水箱の姿勢制御状態の説明図である。It is explanatory drawing of the attitude | position control state of a water stop box. 止水箱の姿勢制御状態の説明図である。It is explanatory drawing of the attitude | position control state of a water stop box. 止水箱の姿勢制御状態の説明図である。It is explanatory drawing of the attitude | position control state of a water stop box. 止水箱の設置状態の説明図である。It is explanatory drawing of the installation state of a water stop box.

符号の説明Explanation of symbols

A…止水箱、1…箱本体、1a…本体部、1b…上部体、2…底板部、2a…突出部分、3…後板部、4…側板部、4b…上部体の側板部、4c…切欠部、5…作業用床体、6…排水ポンプ、7…配水管、8…係止部、9…連結部材、20,30,40…浮力タンク、31,41…空気給排用の弁付き口部、32,42…給排水用の弁付き口部、33,43…オーバーフロー管、50…岸壁、51…鋼製矢板構造物、51a…凹部、51b…凸部。   A ... Water stop box, 1 ... Box body, 1a ... Main body part, 1b ... Upper body, 2 ... Bottom plate part, 2a ... Protruding part, 3 ... Rear plate part, 4 ... Side plate part, 4b ... Side plate part of upper body, 4c ... notches, 5 ... working floor, 6 ... drainage pump, 7 ... water distribution pipe, 8 ... locking part, 9 ... coupling member, 20, 30, 40 ... buoyancy tank, 31, 41 ... for air supply / discharge Mouth with valve, 32, 42 ... Mouth with valve for water supply / drainage, 33, 43 ... Overflow pipe, 50 ... Quay, 51 ... Steel sheet pile structure, 51a ... Recess, 51b ... Projection.

Claims (6)

鋼製矢板構造物を備える岸壁において、前記鋼製矢板構造物の補修関連作業に際して、作業空間を確保するための前面開放形の止水箱を鋼製矢板構造物の表面に取り付け設置する方法であって、
前記止水箱の底板部、後板部および両側板部の外面に、それぞれ空気と水が給排可能な浮力タンクを付設しておいて、該止水箱を、各浮力タンクの空気と水の給排による浮力調整により、前面を上に向けるように傾倒姿勢にして海面に浮かせて設置予定個所の鋼製矢板構造物の前方へ曳行し、該鋼製矢板構造物の前方において浮力タンクの浮力調整により該止水箱を竪姿勢にするとともに深度を調整して、該止水箱の前面を鋼製矢板構造物に対向させ、該止水箱を鋼製矢板構造物の表面に引き寄せ当接させて取り付けることを特徴とする止水箱の設置方法。
In a quay equipped with a steel sheet pile structure, in the repair-related work of the steel sheet pile structure, a front open water stop box for securing a work space is attached to the surface of the steel sheet pile structure. And
A bottom plate portion of the water stop box, the outer surface of the rear plate portion and side plate portions, respectively had been attached air and water supplying and discharging buoyancy tanks, the water stopping boxes, feeding of air and water in each buoyancy tank the buoyancy due to discharge, and towed to the tilting attitude to direct upward the front to the front of the steel sheet pile structures will be established locations float on the sea surface, in front of the steel-made sheet pile structure, the buoyancy tank buoyancy adjust the depth as well as the該止water box in vertical posture by adjusting the front of該止water box is opposed to a steel sheet pile structure, installing a該止water box by abutting attracted to the surface of the steel sheet pile structure The installation method of the water stop box characterized by the above-mentioned.
水中の鋼製矢板構造物に当接させて作業空間を形成するための止水箱で、底板部、後板部および両側板部により前面及び上面が開放形をなすように形成され、前記底板部及び両側板部の前端部にそれぞれ鋼製矢板構造物の壁面に当接する止水用の弾性体が装着されてなる止水箱において、
前記底板部、後板部および両側板部の外面に、それぞれ空気と水との給排により浮力調整が可能な浮力タンクが付設され、各浮力タンクの浮力調整により、曳行時は前面を上に向けるように傾倒姿勢にして海面に浮かせることができ、かつ設置予定個所の鋼製矢板構造物の前方では、該止水箱を竪姿勢にして深度を調整できるように設けられてなることを特徴とする止水箱。
A water stop box for forming a work space by abutting against an underwater steel sheet pile structure, wherein the bottom plate portion, the rear plate portion and both side plate portions are formed such that the front surface and the upper surface are open, and the bottom plate portion And in the water stop box in which an elastic body for water stop that comes into contact with the wall surface of the steel sheet pile structure is attached to the front end of each side plate part,
The bottom plate portion, the outer surface of the rear plate portion and side plate portions, are respectively attached buoyancy tanks capable of buoyancy by supply and discharge of air and water, the buoyancy of the buoyancy tanks, when towed in the upper front It can be floated on the sea surface in a tilted posture so that it is directed , and in front of the steel sheet pile structure at the place where it is to be installed , it is provided so that the depth can be adjusted with the waterstop box in a dredged posture A water-stopping box.
前記後板部および両側板部に付設された浮力タンクには、それぞれタンク上部に空気の給排用の弁付き口部が、タンク下部に給排水用の弁付き口部が設けられ、竪姿勢において浮力調整可能に設けられてなる請求項2に記載の止水箱。 The buoyancy tanks attached to the rear plate portion and the both side plate portions are each provided with a valve-equipped mouth portion for supplying and discharging air at the upper portion of the tank and a valve-equipped mouth portion for supplying and discharging water at the lower portion of the tank. The water stop box according to claim 2 provided so that buoyancy adjustment is possible. 前記後板部および両側板部に付設された浮力タンクは、空気充填時の浮力が上部側ほど大きくなる形状の内部室が形成されてなる請求項2又は3に記載の止水箱。 4. The waterstop box according to claim 2, wherein the buoyancy tank attached to the rear plate portion and the both side plate portions is formed with an internal chamber having a shape in which buoyancy during air filling increases toward the upper side. 前記底板部、後板部および両側板部に付設された各浮力タンクは、内部室が複数の室に画成され、各室毎に空気及び水の給排が可能に設けられてなる請求項2又は3に記載の止水箱。 Each of the buoyancy tanks attached to the bottom plate portion, the rear plate portion, and the both side plate portions has an inner chamber defined in a plurality of chambers, and each chamber is provided so as to be able to supply and discharge air and water. The water stop box according to 2 or 3 . 止水箱の上端部に、該上端部の水没を抑制する浮力タンクが設けられてなる請求項2〜5のいずれか1項に記載の止水箱。 The water stop box according to any one of claims 2 to 5, wherein a buoyancy tank that suppresses submergence of the upper end portion is provided at an upper end portion of the water stop box.
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JP3410584B2 (en) * 1995-07-12 2003-05-26 五洋建設株式会社 Temporary closing method and temporary closing box at deep water
JP2926475B2 (en) * 1996-05-15 1999-07-28 日野海洋開発株式会社 Dry work box
JP4749987B2 (en) * 2006-10-10 2011-08-17 五洋建設株式会社 Temporary deadline work box

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