JP2010261165A - Structure and construction method for temporarily installing incidental equipment in coastal work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a temporal and economic loss by making constructibility excellent. <P>SOLUTION: In a temporary installation of a pier 2, a plurality of column piles 21, cross girders 22, and stringers 23 with water passing holes are used, while the column piles 21 are driven, the cross girders 22 are laid on the column piles 21, and the stringers 23 are planarly laid on the cross girders 22, respectively. In the temporary installation of earth retaining, a plurality of soldier beams, each of which is provided with a joint composed of a pair of sandwich portions extending in a vertical direction, and a plurality of flat plates for prevention of ocean waves are used. The plurality of soldier beams are driven while having each joint of the adjacent soldier beams respectively face each other, and the respective flat plates are installed in the state of being fitted of the joints of the soldier beams, respectively. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、沿岸工事の付帯設備仮設構造及び工法に関し、特に、海洋、港湾などの水域に接する沿岸部で行う沿岸工事に伴い、当該沿岸部に仮設する桟橋、土留の構造及びその工法に関する。   The present invention relates to a temporary structure and a construction method for ancillary facilities for coastal construction, and more particularly to a structure of a pier, a soil retaining, and a construction method for the temporary construction in a coastal area that touches a water area such as the ocean and a harbor.

海の沿岸部に設置された各種設備の補修工事等、沿岸部で工事を行う場合、沿岸部に工事用車両や建設機械の移動その他の作業用通路を通すために、沿岸部の基線から沿岸部の工事領域にかけて桟橋を仮設し、また、海からの波浪が工事の妨げになるので、これを防止するために、沿岸部の工事領域の周囲に土留を仮設するなど、沿岸工事に伴い、沿岸付帯設備を仮設する必要がある。   When repairing various facilities installed on the coastal area of the sea, such as repair work on the coastal area, the coastal line from the coastal line to the coastal area in order to pass construction vehicles, construction machinery and other work passages. A temporary pier was constructed over the construction area, and the waves from the sea hindered the construction. It is necessary to install a temporary coastal facility.

図１１及び図１２に従来の桟橋を示している。図１１及び図１２に示すように、従来の桟橋４は鋼材からなる柱杭４１、…、横桁４２、…、縦桁４３、…、及び覆工板４４、…などにより構築される。この桟橋４の場合、まず、沿岸部の基線上所定の位置に桟橋の乗り入れ部４０を設ける。この場合、図１３に示すように、乗り入れ部４０はその周囲に自立式の鋼矢板（鉄板）４０１、…を打ち込み、海砂で盛土し、盛土の上に鉄板４０２を敷いて形成する。なお、乗り入れ部４０周囲の鋼矢板４０１、…により海砂の流出を防止しているが、海砂は（沿岸水域の）波浪により流出するため、これを日々管理する必要があり、盛土が流出したら、盛土を元に戻すことにより対処する。次に、図１１、図１２に示すように、複数の柱杭４１、…を桟橋の乗り入れ部４０から沿岸部の工事領域に向けて並列に所定の間隔で打設する。次いで、これら柱杭４１、…の上に複数の横桁４２、…を桟橋の幅方向に向けて桟橋の延びる方向に並列に架設し、さらに、これら横桁４２、…上に複数の縦桁４３、…を桟橋の幅方向に並列にかつ桟橋の延びる方向に連続的に架設する。そして、図１４に示すように、複数の縦桁４３、…の上に覆工板４４、…を敷設し、その両側に手摺４５を設置する。なお、各鋼材の接続はボルト、ナットにより行う。このような工程を繰り返し行い、桟橋４を乗り入れ部４０から沿岸部の工事領域まで仮設する。このようにして沿岸部に作業用通路を通し、工事用車両や建設機械の移動に供する。この種の仮設桟橋は特許文献１などに記載されている。   11 and 12 show a conventional jetty. As shown in FIG. 11 and FIG. 12, the conventional pier 4 is constructed by column piles 41 made of steel,..., Cross girders 42..., Vertical girders 43. In the case of this jetty 4, first, a jetty entry portion 40 is provided at a predetermined position on the base line of the coastal area. In this case, as shown in FIG. 13, the loading section 40 is formed by driving a self-supporting steel sheet pile (iron plate) 401 around the periphery thereof, embedding with sea sand, and laying an iron plate 402 on the embankment. In addition, although the steel sheet pile 401 around the entry part 40 prevents the sea sand from flowing out, the sea sand flows out due to the waves (in the coastal waters), so this needs to be managed every day and the embankment flows out. Then, deal with it by returning the embankment. Next, as shown in FIGS. 11 and 12, a plurality of pillar piles 41,... Are driven in parallel at predetermined intervals from the jetty entry part 40 toward the coastal construction area. Next, a plurality of cross girders 42,... Are laid in parallel on the pillar piles 41,... In the width direction of the pier, and the plurality of vertical girders are placed on the cross girders 42,. 43,... Are continuously installed in parallel with the width direction of the jetty and in the extending direction of the jetty. Then, as shown in FIG. 14, lining plates 44,... Are laid on a plurality of stringers 43, and handrails 45 are installed on both sides thereof. Each steel material is connected with bolts and nuts. Such a process is repeated, and the pier 4 is temporarily installed from the entry part 40 to the construction area in the coastal area. In this way, the working path is passed through the coastal area, and the construction vehicle and the construction machine are moved. This type of temporary pier is described in Patent Document 1 and the like.

図１５及び図１６に従来の仮設土留を示している。図１５及び図１６に示すように、従来の仮設土留５は複数の鋼矢板（鉄板）５１、…、及び腹起し、切梁５２、…などで自立式鋼矢板式により築上される。この場合、まず、沿岸部の工事領域周囲の締切り箇所に鋼矢板５１、…を一列（一重鋼矢板方式の場合）又は二列（二重鋼矢板方式の場合）にして連続して打ち込む。そして、これら鋼矢板５１、…を腹起し、切梁５２、…により支承する。このようにして沿岸部の工事領域を複数の鋼矢板５１、…で取り囲み、海洋の波浪を防止する。この種の仮設土留は特許文献２などに記載されている。   15 and 16 show a conventional temporary earth retaining. As shown in FIGS. 15 and 16, the conventional temporary earth retaining 5 is constructed by a self-supporting steel sheet pile type with a plurality of steel sheet piles (iron plates) 51,. In this case, first, steel sheet piles 51,... Are continuously driven in a single row (in the case of a single steel sheet pile method) or in a double row (in the case of a double steel sheet pile method) at a cut-off location around the construction area in the coastal area. And these steel sheet piles 51, ... are raised, and are supported by the cutting beams 52, .... In this way, the construction area in the coastal area is surrounded by a plurality of steel sheet piles 51, to prevent ocean waves. This type of temporary earth retaining is described in Patent Document 2 and the like.

特開２００６−１０４７０９公報JP 2006-104709 A 特開平７−１８６６８号公報Japanese Patent Laid-Open No. 7-18668

しかしながら、上記従来の沿岸工事の付帯設備仮設構造及び工法では、次のような課題がある。
（１）桟橋の覆工板が沿岸水域の波浪、高波の波力により移動したり外れたりするため、覆工板の探索と復旧作業が必要になり、これに要する時間的、経済的損出が大きい。この覆工板が水域中に落ちたりでもしたら、復旧は極めて困難で、経済的損出は甚大である。しかも、沿岸付近の天気は一定しないため、沿岸工事の工程に影響が出ることは必至である。
（２）この覆工板の一部が（沿岸水域の波浪、高波の波力により）外れたりすると、これが横桁、縦桁、ブレースなどに衝接して、これらの鋼材を損傷させるため、これら鋼材の補修が必要になり、これに要する時間的、経済的損出が大きい。既述のとおり、沿岸付近の天気は一定しないため、沿岸工事の工程に影響が出ることは避けられない。
（３）上記（１）、（２）により沿岸工事を一時的に中断しなければならない。
（４）桟橋の乗り入れ部（盛土）は沿岸部の（悪）天候、時化、潮などの変化により、日々崩れるため、その都度、乗り入れ部を復旧しなければならない。
（５）桟橋の乗り入れ部（盛土）が崩壊することになれば、乗り入れ部から敷鉄板や鋼矢板が流出して復旧作業が煩雑になるので、これを未然に防止するために、乗り入れ部の管理が頻繁に必要となる。
（６）この乗り入れ部の復旧が完了しない間は、工事用車両や建設機械などが桟橋に乗り入れできないので、沿岸工事は中断する他ない。
（７）土留を鋼矢板、及び腹起し、切梁などで自立式鋼矢板式により仮設するので、仮設工事の途中で、打ち込み後の鋼矢板の板面に沿岸水域の波浪を受けたりすると、その自立自体が不能となる。このため、沿岸部での土留の設置は容易ではなく、土留の設置に多くの時間を必要とする。土留を撤去する場合も同様である。なお、この場合、鋼矢板を波浪に耐え得る構造に変えることで対応することもできるが、クレーン、材料の重量が増大するため、桟橋の補強や構造の見直しが必要になり、これに要する作業や経済的な負担が大きい。 However, there are the following problems in the conventional temporary construction and construction method of the incidental facilities for the coastal construction described above.
(1) Because the lining plates of the pier are moved and detached due to the waves of the coastal waters and the wave power of the high waves, it is necessary to search for the lining plates and restore them. Is big. Even if this lining board falls into the water, recovery is extremely difficult and the economic loss is enormous. Moreover, since the weather around the coast is not constant, it is inevitable that the coastal construction process will be affected.
(2) If a part of this lining plate comes off (due to the wave of coastal waters, wave force of high waves), it will collide with the cross beam, vertical beam, brace, etc. and damage these steel materials. Steel materials need to be repaired, and the time and economic losses required for this are large. As mentioned above, the weather around the coast is not constant, so it is inevitable that the coastal construction process will be affected.
(3) Coastal construction must be temporarily suspended by the above (1) and (2).
(4) The pier entrance (banking) collapses daily due to changes in coastal (bad) weather, weathering, tides, etc., so the entrance must be restored each time.
(5) If the landing section (banking) of the pier collapses, the iron plate and steel sheet pile will flow out from the landing section, and the restoration work will be complicated. To prevent this, Management is often required.
(6) Since construction vehicles and construction machines cannot enter the pier while the restoration of this entry section is not completed, coastal construction will only be interrupted.
(7) Since the earth retaining is temporarily installed with a steel sheet pile and a self-supporting steel sheet pile type with a cut beam, etc., during the temporary construction work, if the surface of the steel sheet pile after driving is subjected to waves in the coastal waters The independence itself becomes impossible. For this reason, it is not easy to install a retaining ring in the coastal area, and it takes a lot of time to install the retaining ring. The same applies when removing the retaining ring. In this case, the steel sheet pile can be changed to a structure that can withstand waves, but the weight of the crane and material will increase, so it will be necessary to reinforce the pier and review the structure. The economic burden is large.

本発明は、このような従来の課題を解決するものであり、この種の沿岸工事の付帯設備仮設構造及び工法において、覆工板が沿岸水域の波浪、高波の波力により移動したり外れたりすることに対して行う覆工板の探索と復旧作業、さらに、この覆工板の一部が外れて横桁、縦桁、ブレースなどに衝接しこれら鋼材を損傷させることに対して行う補修作業を一切不要とし、時間的、経済的な損出をなくすこと、しかも、波浪、高波の波力を軽減でき、施工性に優れた桟橋にすること、さらに、乗り入れ部の盛土の流出を少なくし、乗り入れ部の管理、及び復旧作業を軽減すること、併せて、乗り入れ部を簡易かつ経済的（低コスト）に形成すること、また、土留を簡易かつ短時間にしかも経済的（低コスト）に設置及び撤去すること、併せて波浪を確実に防止すること、などを目的とする。   The present invention solves such a conventional problem, and in this type of incidental facility temporary construction and construction method for coastal construction, the lining plate is moved or detached due to the waves of the coastal waters or the wave power of high waves. Search and recovery work for the lining plate to be performed, and repair work to damage these steel materials by partly detaching the lining plate and coming into contact with the horizontal, vertical and braces. Eliminates time and economic loss, reduces wave power from waves and high waves, makes the pier excellent in workability, and reduces the outflow of embankments at the entrance. , Reduce the management and restoration work of the entry part, and also form the entry part easily and economically (low cost), and make the earth retaining simple, short and economical (low cost) Installation and removal, combined with waves To reliably prevent, for the purpose of such.

上記目的を達成するために、本発明は、沿岸工事に伴い、沿岸部の基線から沿岸部の工事領域まで桟橋を仮設して作業用通路を通すとともに、前記工事領域の周囲に土留を仮設して沿岸水域の波浪を防止する、沿岸工事の付帯設備仮設構造において、桟橋は、前記沿岸部の基線と前記沿岸部の工事領域までの間に並列に所定の間隔で打設される複数の柱杭と、前記複数の柱杭の上に前記桟橋の幅方向に向けて前記桟橋の延びる方向に並列に架設される複数の横桁と、前記複数の横桁上に前記桟橋の幅方向に並列にかつ前記桟橋の延びる方向に連続的に架設される複数の縦桁とを備え、前記複数の縦桁は当該各縦桁に通水孔が穿たれて、前記桟橋の幅方向に相互に近接して前記桟橋の延びる方向に相互に連接して敷設される、ことを要旨とする。   In order to achieve the above object, according to the present invention, along with coastal construction, a pier is temporarily installed from a coastal base line to a coastal construction area to pass a work passage, and a soil retaining wall is temporarily installed around the construction area. In the temporary construction of ancillary facilities for coastal construction that prevents coastal waters, the pier is a plurality of columns that are placed in parallel between the base line of the coastal area and the construction area of the coastal area at predetermined intervals. A pile, a plurality of cross beams installed in parallel in the direction of the jetty extending in the width direction of the jetty on the plurality of column piles, and a parallel in the width direction of the jetty on the plurality of cross girders And a plurality of stringers continuously installed in the extending direction of the pier, the plurality of stringers having water passage holes formed in the respective stringers and being close to each other in the width direction of the pier The gist is that the piers are connected to each other in the extending direction of the pier.

また、この構造においては、各部に次のような構成を備えることが好ましい。
（１）柱杭、横桁、縦桁はＨ型鋼が採用される。
（２）沿岸部の基線上所定の位置から前記沿岸部の内方に向けて所定の範囲の周囲に複数の矢板が打設され、当該領域内が盛土され、鉄板が敷設されてなる桟橋の乗り入れ部を備え、前記矢板がタイロッド方式により支承される。
（３）土留は、工事領域の周囲に沿って所定の間隔に打設される複数の親杭と、前記各親杭間に設置される波浪防止用の複数の平板とを備え、前記各親杭は隣り合う各々の相互に対向する面に上下方向に延びる一対の挟持部からなるジョイントを有し、前記各平板は前記各親杭間に前記各ジョイント間に嵌め込まれて設置される。
（４）親杭はＨ型鋼、平板は鉄板、ジョイントはＬ型鋼がそれぞれ採用される。 Moreover, in this structure, it is preferable to provide each part with the following configuration.
(1) H-shaped steel is adopted for column piles, cross girders, and vertical girders.
(2) A pier in which a plurality of sheet piles are placed around a predetermined range from a predetermined position on the coastal base line toward the inside of the coastal area, the area is embanked, and an iron plate is laid. The sheet pile is provided by a tie rod system.
(3) The retaining ring includes a plurality of parent piles placed at predetermined intervals along the circumference of the construction area, and a plurality of wave prevention flat plates installed between the parent piles. A pile has a joint which consists of a pair of pinching parts extended in the up-and-down direction on each mutually opposing surface, and each above-mentioned flat plate is inserted between each above-mentioned joint between each above-mentioned parent pile, and is installed.
(4) The parent pile is an H-shaped steel, the flat plate is an iron plate, and the joint is an L-shaped steel.

上記目的を達成するために、本発明は、沿岸工事に伴い、沿岸部の基線から沿岸部の工事領域まで桟橋を仮設して作業用通路を通すとともに、前記工事領域の周囲に土留を仮設して沿岸水域の波浪を防止する、沿岸工事の付帯設備仮設工法において、桟橋の仮設は、複数の柱杭、横桁、及び通水孔を設けた縦桁を用い、前記複数の柱杭を前記沿岸部の基線と前記沿岸部の工事領域との間に並列に所定の間隔で打設し、前記複数の柱杭の上に前記複数の横桁を前記桟橋の幅方向に向けて前記桟橋の延びる方向に並列に架設して、前記複数の横桁上に前記複数の縦桁を前記桟橋の幅方向に並列に相互に近接して、かつ前記桟橋の延びる方向に相互に連接して敷設する、ことを要旨とする。   In order to achieve the above object, according to the present invention, along with coastal construction, a pier is temporarily installed from a coastal base line to a coastal construction area to pass a work passage, and a soil retaining wall is temporarily installed around the construction area. In the incidental facility temporary construction method for preventing coastal waters, the pier temporary construction uses a plurality of pillar piles, horizontal girders, and vertical girder provided with water holes, and the plurality of pillar piles are Between the base line of the coastal area and the construction area of the coastal area at a predetermined interval in parallel, the plurality of cross beams on the plurality of pillar piles in the width direction of the pier, A plurality of vertical beams are laid in parallel in the extending direction, and the plurality of vertical beams are laid in parallel to each other in the width direction of the pier and connected to each other in the extending direction of the pier. This is the gist.

また、この工法においては、土留の仮設は、上下方向に延びる一対の挟持部からなるジョイントを設けた複数の親杭と、波浪防止用の複数の平板を用い、前記複数の親杭を工事領域の周囲に沿って所定の間隔に隣り合う各親杭の各ジョイントを相互に対向させつつ打設して、前記各平板を前記各親杭間に前記各ジョイント間に嵌め込むことにより設置する。   Further, in this construction method, the temporary retaining of the retaining ring uses a plurality of parent piles provided with joints including a pair of sandwiching portions extending in the vertical direction and a plurality of flat plates for preventing waves, and the plurality of parent piles are used as a construction area. The respective joints of the respective parent piles that are adjacent to each other at a predetermined interval along the periphery of the pile are placed while facing each other, and the respective flat plates are installed by being fitted between the respective joints between the respective parent piles.

本発明の沿岸工事の付帯設備仮設構造及び工法では、上記の各構成及び各工法により、次のような効果を奏することができる。
（１）この桟橋では、覆工板を使用しないので、従来の、覆工板が沿岸水域の波浪、高波の波力により移動したり外れたりすることに対して行う覆工板の探索と復旧作業、さらに、この覆工板の一部が外れて横桁、縦桁、ブレースなどに衝接しこれら鋼材を損傷させることに対して行う補修作業を一切不要とし、時間的、経済的な損出をなくすことができ、工期のロスを大幅に減少することができる。しかも、従来の覆工板に代えて、通水孔を設けた縦桁を敷き詰めて、通路面を構成するので、通路面の剛性を高めて波浪、高波に対して強くすることができ、他面で、通水孔の作用により波浪、高波の波力を軽減することができ、この通路面が従来のように移動したり外れたりすることがなく、破損することもない。この構造により、多少の波浪でも、（沿岸工事の）作業が可能となる。また、従来の覆工板がないことで、横桁、縦桁の各接続部に隙間が多くなり、施工性がよい利点がある。
（２）この桟橋の乗り入れ部では、乗り入れ部の周囲に矢板を打設し、この矢板をタイロッド方式により支承するので、乗り入れ部の盛土の流出を少なくすることができ、これにより、乗り入れ部の管理、及び復旧作業を大幅に軽減することができる。しかも、このタイロッド方式による合成強度により、矢板が従来に比べて小さく軽量のものですみ、乗り入れ部を簡易かつ経済的（低コスト）に形成することができる。
（３）この土留では、複数の親杭を工事領域の周囲に沿って所定の間隔に打設して、複数の平板をそれぞれ各親杭間に各親杭の各ジョイント間に嵌め込むことにより設置するので、土留を小さな材料で対応可能な単純な構造にして、土留を簡易かつ短時間にしかも経済的（低コスト）に設置又は撤去することができる。この場合、各親杭間に所定の間隔があり、各親杭を連結していないので、波浪に対して強く、また、各平板を各親杭のジョイントに嵌め込むだけなので、波浪状況に応じて施工手順を決め、又は変更することができ、施工性が極めてよい。さらに、複数の平板を複数の親杭間にジョイントを介して支持することで、軽量の矢板を使用しても、波浪を確実に防止することができる。 In the incidental facility temporary structure and construction method for coastal construction of the present invention, the following effects can be achieved by the above-described configurations and construction methods.
(1) Since this pier does not use a lining plate, the search and recovery of the lining plate that is performed when the lining plate is moved or detached due to waves in the coastal waters or wave force of high waves. There is no need for any work, and no repair work is required to damage these steel materials by detaching a part of the lining plate and coming into contact with a cross beam, vertical beam, brace, etc. Can be eliminated, and the loss of the construction period can be greatly reduced. In addition, instead of the conventional lining plate, a stringer with water passage holes is laid down to configure the passage surface, so that the rigidity of the passage surface can be increased and strong against waves and high waves. On the surface, waves and high wave forces can be reduced by the action of the water passage hole, and the passage surface does not move or come off as in the conventional case, and is not damaged. This structure enables work (coastal work) even with some waves. Moreover, since there is no conventional lining board, there are many gaps in each connecting portion of the cross beam and the vertical beam, and there is an advantage that the workability is good.
(2) At the entrance part of this pier, a sheet pile is placed around the entry part, and this sheet pile is supported by the tie rod method, so that the outflow of the embankment at the entry part can be reduced. Management and recovery work can be greatly reduced. In addition, the combined strength of the tie rod method allows the sheet pile to be smaller and lighter than conventional ones, and the entry portion can be formed easily and economically (low cost).
(3) In this earth retaining, by placing a plurality of parent piles at predetermined intervals along the circumference of the construction area, and inserting a plurality of flat plates between each parent pile between each joint of each parent pile. Since it is installed, it is possible to install or remove the soil retainer simply, in a short time and economically (low cost), with a simple structure that can handle the soil retaining material with a small material. In this case, there is a predetermined interval between each parent pile, and each parent pile is not connected, so it is strong against waves and only fits each flat plate into the joint of each parent pile. The construction procedure can be determined or changed, and the workability is very good. Furthermore, by supporting a plurality of flat plates via a joint between a plurality of parent piles, it is possible to reliably prevent waves even if a lightweight sheet pile is used.

本発明の一実施の形態における沿岸工事の付帯設備仮設構造及び工法を示す平面図The top view which shows the incidental equipment temporary structure and construction method of coastal construction in one embodiment of this invention 同構造及び工法により仮設された桟橋の乗り入れ部及び桟橋の一部省略側面断面図Side section of the pier that is temporarily installed by the same structure and construction method and a partly omitted side view of the pier 同構造及び工法により仮設された桟橋の乗り入れ部及び桟橋の一部省略平面断面図Partially omitted plan cross-sectional view of the pier entry part and the pier temporarily constructed by the same structure and construction method 同構造及び工法により仮設された桟橋の一部省略正面断面図Partially omitted front cross-sectional view of the pier temporarily constructed by the same structure and construction method 同構造及び工法により仮設された桟橋の一部省略平面図Partially omitted plan view of the pier temporarily constructed by the same structure and construction method 同構造及び工法により仮設された土留の平面図Top view of the retaining wall temporarily constructed by the same structure and construction method 同構造及び工法により仮設された土留の側面断面図Side cross-sectional view of the retaining wall temporarily constructed by the same structure and construction method 同構造及び工法により仮設された土留の要部拡大平面断面図The main part enlarged plan sectional view of the earth retaining wall temporarily constructed by the same structure and construction method 同構造及び工法により仮設された土留の要部拡大平面断面図The main part enlarged plan sectional view of the earth retaining wall temporarily constructed by the structure and construction method 同構造及び工法による土留の平板に使用する鉄板の正面図Front view of iron plate used for earth retaining plate by the same structure and construction method 従来の沿岸工事の付帯設備仮設構造及び工法により仮設された桟橋の乗り入れ部及び桟橋の一部省略側面断面図Side view of a side view of a part of the pier that has been temporarily installed by the construction method and a temporary structure of ancillary facilities for conventional coastal construction and a part of the pier. 同構造及び工法により仮設された桟橋の一部省略正面断面図Partially omitted front cross-sectional view of the pier temporarily constructed by the same structure and construction method 同構造及び工法により仮設された桟橋の乗り入れ部及び桟橋の一部省略平面断面図Partially omitted plan cross-sectional view of the pier entry part and the pier temporarily constructed by the same structure and construction method 同構造及び工法により仮設された桟橋の一部省略平面図Partially omitted plan view of the pier temporarily constructed by the same structure and construction method 同構造及び工法により仮設された土留の平面図Top view of the retaining wall temporarily constructed by the same structure and construction method 同構造及び工法により仮設された土留の側面断面図Side cross-sectional view of the retaining wall temporarily constructed by the same structure and construction method

次に、この発明を実施するための形態について図を用いて説明する。図１乃至図１０にこの発明の一実施の形態を示している。この実施の形態では、海の沿岸部に設置された塩水取水設備に海水で腐食した取水管があり、この取水管の取替工事（沿岸工事）を行うため、沿岸部の基線（浜線）から沿岸部の工事領域まで桟橋を仮設し、沿岸部の工事領域の周囲に土留を仮設する場合を例示する。図１に示すように、この沿岸部は浜線Ｌからおよそ３０ｍ乃至４０ｍのところまで遠浅の砂浜で、その先が水深およそ２５ｍ乃至３０ｍの落ち込みになっている。その地点で、波浪が大きくなり、砂浜に打ち上げられる。引き波も波浪が大きいため、浜線Ｌは刻一刻変化する。天候は変わりやすく、時化のときもあれば、台風のときもある。このような状況の沿岸部に塩水取水設備Ａが設置されている。この設備Ａは、浜線Ｌから４０ｍ位のところに、ポンプ場ａが設置され、このポンプ場ａから海側及び陸側に送水管ｂ、ｃが延ばされている。海側の送水管ｂはポンプ場ａから海洋に向けて架台ｅを介して設置され、その先端に海水の取水管ｄが設けられる。陸側の送水管ｃはポンプ場ａから内陸に向けて橋脚ｆを介して設置され、陸側の除砂装置ｇを介して供給先へ連結される。この仮設工事では、浜線Ｌ上の所定の位置から陸側の送水管ｃ、ポンプ場ａ、及び海側の送水管ｂに沿って取水管ｄの近傍まで桟橋２を仮設して浜線Ｌ上の所定の位置と取水管ｄとの間に作業用通路を通し、取水管ｄの周囲に土留３を仮設して海洋からの波浪を防止する。   Next, embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 10 show an embodiment of the present invention. In this embodiment, there is an intake pipe corroded by seawater in the saltwater intake facility installed in the coastal area of the sea. The replacement line (coastal work) of this intake pipe is carried out, so the baseline of the coastal area (beach line) An example is shown in which a pier is temporarily constructed from the construction area to the coastal area, and a earth retaining wall is temporarily constructed around the construction area in the coastal area. As shown in FIG. 1, this coastal area is a shallow sandy beach from the beach line L to about 30 m to 40 m, and the tip of the coast is a depression of about 25 m to 30 m in depth. At that point, the waves grow and are launched onto a sandy beach. Because the waves are also large, the beach line L changes every moment. The weather is variable and can be tempered or typhoon. The salt water intake facility A is installed in the coastal area in such a situation. In this facility A, a pump station a is installed at a position about 40 m from the beach line L, and water pipes b and c are extended from the pump station a to the sea side and the land side. The water supply pipe b on the sea side is installed from the pumping station a toward the ocean via a mount e, and a water intake pipe d for seawater is provided at the tip thereof. The water pipe c on the land side is installed from the pump station a toward the inland via the bridge pier f, and is connected to the supply destination via the sand removal device g on the land side. In this temporary construction, the pier 2 is temporarily installed from a predetermined position on the beach line L to the vicinity of the intake pipe d along the water supply pipe c on the land side, the pump station a, and the water supply pipe b on the sea side. A work passage is passed between the upper predetermined position and the intake pipe d, and the earth retaining wall 3 is temporarily installed around the intake pipe d to prevent waves from the ocean.

図２及び図３に桟橋の乗り入れ部を示している。図２及び図３に示すように、桟橋の乗り入れ部１は沿岸部の浜線Ｌ上所定の位置から沿岸部の内方に向けて、つまり海方向所定の範囲に形成され、浜線Ｌから略同じレベルの平面状に延出される。この乗り入れ部１は、当該所定の範囲の周囲に複数の鋼矢板１１、…が打設され、当該領域内が海砂により盛土され、この盛土の上に鉄板１２が敷設されて形成される。この乗り入れ部１では、鋼矢板１１は控え工及びタイ材を用いるタイロッド方式により支承される。この場合、各鋼矢板１１、…間はタイロッド又はタイワイヤーなどのタイ材により連結され、各鋼矢板１１、…はこれらタイ材により引張られて支承される。なお、このタイロッド方式による合成強度により、鋼矢板１１を軽量化して、鋼矢板１１に２型矢板を使用する。   FIG. 2 and FIG. 3 show the entrance part of the pier. As shown in FIG. 2 and FIG. 3, the landing part 1 of the pier is formed from a predetermined position on the beach line L in the coastal area toward the inside of the coastal area, that is, in a predetermined range in the sea direction. It is extended to a plane of substantially the same level. The loading section 1 is formed by placing a plurality of steel sheet piles 11 around the predetermined range, embedding the area with sea sand, and laying an iron plate 12 on the embankment. In this entry part 1, the steel sheet pile 11 is supported by a tie rod method using a tie and a tie material. In this case, the steel sheet piles 11 are connected by tie materials such as tie rods or tie wires, and the steel sheet piles 11 are pulled and supported by these tie materials. In addition, the steel sheet pile 11 is reduced in weight by the synthetic strength by this tie rod system, and a 2 type sheet pile is used for the steel sheet pile 11.

図２及び図４、図５に桟橋を示している。図２及び図４に示すように、桟橋２は、複数の柱杭２１、…、複数の横桁２２、…、複数の縦桁２３、…などにより構築される。複数の柱杭２１、…は沿岸部の基線と沿岸部の工事領域までの間に並列に所定の間隔で打設される。この場合、柱杭２１はＨ型鋼が採用され、複数のＨ型鋼が浜線Ｌに延出形成された乗り入れ部１から沿岸部の取水管ｄまでの間に並列に所定の間隔で打ち込まれる。なお、これらの柱杭２１、…を安定させるため、各柱杭２１、…間にブレース２１１、…などが取り付けられる。複数の横桁２２、…は複数の柱杭２１、…の上に桟橋の幅方向に向けて桟橋の延びる方向に並列に架設される。この場合、横桁２２はＨ型鋼が採用され、複数のＨ型鋼が複数の柱杭２１、…の上に、Ｈ型鋼の両側フランジを上下にして両端を桟橋の幅方向に向け、桟橋の延びる方向に並列に架設される。複数の縦桁２３、…は通水孔が穿たれて、複数の横桁２２、…上に桟橋の幅方向に並列に相互に近接してかつ桟橋の延びる方向に相互に連接して連続的に架設され、複数の縦桁２３、…が全体として平面状に敷設される。この場合、縦桁２３はＨ型鋼が採用され、両側のフランジ面に多数の通水孔が穿たれる。これらのＨ型鋼は複数の横桁２２、…上に、図４及び図５に示すように、Ｈ型鋼の両側フランジを上下にして両端を桟橋の延びる方向に向け、桟橋の幅方向に並列に相互に所定の小さい（この場合、５ｃｍほどの）間隔で近接して、かつ桟橋の延びる方向に相互に連接して架設される。このように多数の縦桁２３、…が複数の横桁２２、…上に架け渡され平面状に敷設されて、横桁２２、…上に桟橋の通路面が形成される。そして、両側の各縦桁２３、…に沿って手摺２４、２４が設置固定される。なお、これら鋼材の接続に、ボルト・ナットが使用されるが、この場合、波浪の波力でナットが緩まないように、ダブルナットにして、溶接により固定されることが好ましい。   The pier is shown in FIGS. 2, 4, and 5. As shown in FIGS. 2 and 4, the pier 2 is constructed by a plurality of pillar piles 21,..., A plurality of horizontal girders 22,. The plurality of pillar piles 21 are placed in parallel at predetermined intervals between the coastal base line and the coastal construction area. In this case, the pillar pile 21 is made of H-shaped steel, and a plurality of H-shaped steels are driven in parallel at a predetermined interval from the loading portion 1 where the H-shaped steel extends to the beach line L to the intake pipe d in the coastal area. In addition, in order to stabilize these pillar piles 21, ..., braces 211, ... are attached between each pillar pile 21, .... The plurality of cross girders 22,... Are laid in parallel on the plurality of pillar piles 21,. In this case, the cross girder 22 is made of H-shaped steel, and the plurality of H-shaped steels extend on the plurality of column piles 21,... It is installed in parallel in the direction. The plurality of vertical girders 23,... Are continuously connected to each other in parallel with the width direction of the jetty and connected to each other in the extending direction of the jetty. A plurality of vertical beams 23 are laid in a planar shape as a whole. In this case, the stringer 23 is made of H-shaped steel, and a large number of water holes are formed in the flange surfaces on both sides. As shown in FIGS. 4 and 5, these H-shaped steels are arranged in parallel with the width direction of the pier on the plurality of cross beams 22, as shown in FIGS. They are installed close to each other at a predetermined small interval (in this case, about 5 cm) and connected to each other in the extending direction of the jetty. In this way, a large number of vertical girders 23,... Are bridged over a plurality of horizontal girders 22,. And the handrails 24 and 24 are installed and fixed along the vertical girders 23 on both sides. Bolts and nuts are used to connect these steel materials. In this case, it is preferable that the nuts are fixed by welding so that the nuts are not loosened by the wave force of waves.

図６乃至図１０に土留を示している。図６、図７に示すように、土留３は複数の親杭３１、…と波浪防止用の複数の平板３２、…とにより組み立てられる。複数の親杭３１、…はそれぞれ打設配列されたときの隣り合う各々の相互に対向する面に上下方向に延びる一対の挟持部３３１、３３１からなるジョイント３３を備え、工事領域の周囲に沿って所定の間隔に打設される。この場合、図８に示すように、親杭３１はＨ型鋼が採用され、ジョイント３３の一対の挟持部３３１、３３１にＬ型鋼が採用されて、工事領域の角部に打設される親杭３１は、一方のフランジ面及び一方のウェブ面のそれぞれ幅方向略中央に、一対のＬ型鋼が（各Ｌ型鋼の長さ方向を）上下に向けて（平板３２の厚さよりも大きい）所定の間隔で並列に固着されてジョイント３３が形成され、工事領域の角部間に打設される親杭３１は、両方のフランジ面のそれぞれ幅方向略中央に、一対のＬ型鋼が（各Ｌ型鋼の長さ方向を）上下に向けて（平板の厚さよりも大きい）所定の間隔で並列に固着されてジョイント３３が形成される。なお、このジョイント３３は、図７に示すように、親杭３１の根入れ部分に設ける必要はない。このようにして、図６に示すように、複数のＨ型鋼は角部のもの及び角部間のものがそれぞれ、沿岸部の取水管ｄの周囲を略矩形状に取り囲むようにしてかつ各親杭３１、…の各ジョイント３３、…を各親杭３１、…の配列方向に向けて打ち込まれ、相互に隣り合う各親杭３１、…の各ジョイント３３、…が相互に対向される。複数の平板３２は所定の大きさ、形状を有し、これら親杭３１、…間に設置される。この場合、平板３２は陸加工とし、鉄板により所定の大きさの矩形状に形成される。さらに、平板３２の両側縁部にはそれぞれ、図９に示すように、各親杭３１、…の各ジョイント３３、…の隙間を塞ぐためのゴム材からなる塞ぎ部材３４が取り付けられる。また、この平板３２は、図１０に示すように、複数（例えば２枚）の鉄板を繋ぎジョイント３５で連結して形成されてもよい。さらに、この平板３２は、図１０に示すように、クレーンの吊り下げ用に、上部の２箇所にそれぞれ吊り下ろし用金具３６、３６が固着され、これらの金具３６、３６にワイヤ３７を介して玉掛け用フック３８が取り付けられることが好ましい。このようにして複数の平板３２、…はそれぞれ、（クレーンによる吊り下げ、落とし込みにより）各親杭３１、…間に各親杭３１、…の各ジョイント３３、…間に嵌め込まれて設置される。そして、各親杭３１の各ジョイント３３の隙間は各平板３２両側の塞ぎ部材３４により塞がれて、砂止め（砂の浸入が防止）される。   The earth retaining is shown in FIGS. As shown in FIGS. 6 and 7, the earth retaining wall 3 is assembled by a plurality of parent piles 31,... And a plurality of flat plates 32 for preventing waves. Each of the plurality of parent piles 31 is provided with a joint 33 composed of a pair of sandwiching portions 331 and 331 extending in the vertical direction on the mutually facing surfaces adjacent to each other when placed and arranged, along the periphery of the construction area Are placed at predetermined intervals. In this case, as shown in FIG. 8, H-shaped steel is adopted for the parent pile 31, L-shaped steel is adopted for the pair of sandwiching portions 331 and 331 of the joint 33, and the parent pile is driven at the corner of the construction area. 31 is a predetermined pair of L-shaped steels (in the length direction of each L-shaped steel) vertically (greater than the thickness of the flat plate 32) at approximately the center in the width direction of one flange surface and one web surface. The parent pile 31 that is fixed in parallel at an interval to form a joint 33 and is driven between the corners of the construction area has a pair of L-shaped steels (each L-shaped steel at the center in the width direction of both flange surfaces). The joint 33 is formed by being fixed in parallel at a predetermined interval (larger than the thickness of the flat plate) in the vertical direction (in the length direction). In addition, it is not necessary to provide this joint 33 in the root insertion part of the main pile 31, as shown in FIG. In this way, as shown in FIG. 6, the plurality of H-shaped steels have corner portions and those between the corner portions so as to surround the intake pipe d in the coastal area in a substantially rectangular shape, and The joints 33 of the piles 31 are driven in the arrangement direction of the parent piles 31 and the joints 33 of the parent piles 31 adjacent to each other are opposed to each other. The plurality of flat plates 32 have a predetermined size and shape, and are installed between the parent piles 31. In this case, the flat plate 32 is land-processed, and is formed into a rectangular shape with a predetermined size by an iron plate. Further, as shown in FIG. 9, closing members 34 made of a rubber material for closing the gaps between the joints 33 of the respective parent piles 31 are attached to both side edges of the flat plate 32. Further, as shown in FIG. 10, the flat plate 32 may be formed by connecting a plurality of (for example, two) iron plates and connecting them with a joint 35. Further, as shown in FIG. 10, the flat plate 32 has hanging brackets 36, 36 fixed to the upper two portions for hanging the crane, and these brackets 36, 36 are connected via wires 37. It is preferable that a sling hook 38 is attached. In this way, the plurality of flat plates 32,... Are respectively fitted and installed between the respective parent piles 31,... Between the respective parent piles 31,. . And the clearance gap between each joint 33 of each parent pile 31 is block | closed by the blocking member 34 of each flat plate 32 both sides, and sand stop (prevention of sand penetration) is carried out.

この付帯設備の仮設工法について図１を用い、さらに図２乃至図６及び図９参照しながら説明する。図１において、この工法では、桟橋の乗り入れ部１を仮設する工程、桟橋２を仮設する工程、土留３を仮設する工程を順次行う。   The temporary construction method of this incidental facility will be described with reference to FIG. 1 and further with reference to FIGS. 2 to 6 and 9. In FIG. 1, in this construction method, a step of temporarily installing the landing portion 1 of the pier, a step of temporarily setting the pier 2, and a step of temporarily setting the earth retaining 3 are sequentially performed.

桟橋の乗り入れ部１を作る工程では、まず、図３に示すように、沿岸部の浜線Ｌ上所定の位置から沿岸部の内方（海の方向）に向けて所定の範囲の周囲に、当該所定の範囲を略矩形状に取り囲むようにして複数の鋼矢板１１、…を打設する。この場合、各鋼矢板１１をタイロッド又はタイワイヤーなどのタイ材により連結する、タイロッド方式により支承する。そして、当該範囲内を海砂により盛土し、この盛土の上に鉄板１２を敷設する。このようにして桟橋の乗り入れ部１を浜線Ｌ上所定の位置から略同じレベルの平面状に延出する。   In the step of making the pier entry part 1, as shown in FIG. 3, first, around a predetermined range from a predetermined position on the beach line L of the coastal part toward the inside of the coastal part (the direction of the sea), A plurality of steel sheet piles 11 are placed so as to surround the predetermined range in a substantially rectangular shape. In this case, each steel sheet pile 11 is supported by a tie rod system in which tie materials such as tie rods or tie wires are connected. And the said range is embanked with sea sand, and the iron plate 12 is laid on this embankment. In this way, the landing portion 1 of the pier is extended from a predetermined position on the beach line L to a plane of substantially the same level.

桟橋の仮設工程では、まず、図２に示すように、複数の柱杭（Ｈ型鋼）２１、…を沿岸部の基線と沿岸部の工事領域までの間に並列に所定の間隔で打設する。この場合、複数の柱杭２１、…を浜線Ｌに延出形成された乗り入れ部１から沿岸部の取水管ｄまでの間に並列に所定の間隔で打ち込む。なお、これらの柱杭２１、…を安定させるため、各柱杭２１、…間にブレース２１１などを取り付ける。続いて、図２及び図４に示すように、複数の柱杭２１、…の上に複数の横桁（Ｈ型鋼）２２、…を（Ｈ型鋼の両側フランジを上下にして）両端を桟橋の幅方向に向け、桟橋の延びる方向に並列に架設する。次いで、図４及び図５に示すように、複数の横桁２２、…の上に複数の縦桁（Ｈ型鋼）２３、…を桟橋の幅方向に並列にかつ桟橋の延びる方向に連続的に架設する。この場合、複数の縦桁２３、…に複数の通水孔を穿設し、これらの縦桁２３、…を桟橋の幅方向に相互に近接して並列に桟橋の延びる方向に相互に連接して架設し、これらの縦桁２３、…を複数の横桁２２、…上に平面状に敷設する。そして、この両側の各縦桁２３、…に沿って手摺２４、２４を設置固定する。   In the temporary construction process of the pier, first, as shown in FIG. 2, a plurality of pillar piles (H-shaped steel) 21 are placed in parallel at predetermined intervals between the base line of the coastal area and the construction area of the coastal area. . In this case, a plurality of pillar piles 21,... Are driven in parallel at a predetermined interval from the loading portion 1 formed to extend to the beach line L to the intake pipe d in the coastal area. In addition, in order to stabilize these pillar piles 21, ..., the brace 211 etc. are attached between each pillar pile 21, .... Subsequently, as shown in FIGS. 2 and 4, a plurality of cross beams (H-shaped steel) 22,... Are placed on a plurality of column piles 21,. Install in parallel in the width direction and in the direction the pier extends. Next, as shown in FIGS. 4 and 5, a plurality of stringers (H-shaped steel) 23,... Are continuously arranged in parallel with the width direction of the jetty and in a direction in which the jetty extends. Erection. In this case, a plurality of water passage holes are formed in the plurality of vertical beams 23,..., And these vertical beams 23,. These vertical girders 23,... Are laid in a flat shape on the plural horizontal girders 22,. And the handrails 24 and 24 are installed and fixed along the vertical girders 23 on both sides.

土留の仮設工程では、まず、図６に示すように、複数の親杭（Ｈ型鋼）３１、…を先行して工事領域の周囲に沿って所定の間隔に打設する。この場合、各親杭３１の周囲２方向の面に上下方向に延びる一対の挟持部（Ｌ型鋼）３３１、３３１からなるジョイント３３を設け、各親杭３１の各ジョイント３３を各親杭３１の配列方向に向けて打ち込み、相互に隣り合う各親杭３１の各ジョイント３３を相互に対向させる。そして、図６に示すように、所定の大きさ及び形状の複数の平板（鉄板）３２、…を、これら親杭３１、…間に設置する。この場合、平板３２の両側縁部にそれぞれ、図９に示すように、各親杭３１の各ジョイント３３の隙間を塞ぐためのゴム材からなる塞ぎ部材３４、３４を取り付けて、各平板３２を（クレーンによる吊り上げ、落とし込みにより）各親杭３１、３１間に各親杭３１、３１の各ジョイント３３、３３間に嵌め込み設置し、同時に、各平板３２両側の各塞ぎ部材３４で各親杭３１、３１の各ジョイント３３、３３の隙間を塞ぎ、砂止めする。   In the temporary construction process of the earth retaining, first, as shown in FIG. 6, a plurality of parent piles (H-shaped steel) 31 are preceded and placed at predetermined intervals along the periphery of the construction area. In this case, the joint 33 which consists of a pair of clamping part (L-shaped steel) 331 and 331 extended to an up-down direction is provided in the surface of 2 directions around each parent pile 31, and each joint 33 of each parent pile 31 is attached to each parent pile 31. Driving in the arrangement direction, the joints 33 of the parent piles 31 adjacent to each other are opposed to each other. Then, as shown in FIG. 6, a plurality of flat plates (iron plates) 32 of a predetermined size and shape are installed between the parent piles 31. In this case, as shown in FIG. 9, closing members 34 and 34 made of a rubber material for closing the gaps of the joints 33 of the parent piles 31 are attached to both side edges of the flat plate 32, respectively. Each parent pile 31 is installed by fitting between each joint 33, 33 of each parent pile 31, 31 between each parent pile 31, 31 (by lifting and dropping by a crane), and at the same time, with each closing member 34 on both sides of each flat plate 32. , 31 to close the gaps between the joints 33 and 33, and to prevent sand.

以上説明したように、この構造及び工法では、従来の覆工板を使用しないので、従来、覆工板が沿岸水域の波浪、高波の波力により移動したり外れたりすることに対して行う覆工板の探索と復旧作業、さらに、この覆工板の一部が外れて横桁、縦桁、ブレースなどに衝接しこれら鋼材を損傷させることに対して行う補修作業を一切不要とし、時間的、経済的な損出をなくすことができ、工期のロスを大幅に減少することができる。しかも、従来の覆工板に代えて、桟橋２の上面に通水孔を設けた複数の縦桁２３、…を略平面状に敷き詰めて、通路面を構成するので、通路面の剛性を高めて波浪、高波に対して強くすることができ、他面で通水孔の作用により波浪、高波の波力を軽減することができ、この通路面が従来のように移動したり外れたりすることがなく、破損することもない。したがって、この桟橋２によれば、多少の波浪ならば、沿岸工事が可能となる。また、覆工板がないことで、横桁２２、縦桁２３の各接続部に隙間が多くなり、施工性を大幅に向上させることができる。   As described above, since the conventional lining plate is not used in this structure and construction method, conventionally, the lining plate is conventionally used for the movement and detachment caused by the waves in the coastal waters and the wave force of high waves. There is no need to search for and restore the work board, and repair work to prevent damage to these steel materials due to a part of the lining board coming off and colliding with the cross beam, vertical girder, brace, etc. Economic loss can be eliminated and construction period loss can be greatly reduced. Moreover, instead of the conventional lining plate, a plurality of vertical girders 23 provided with water passage holes on the upper surface of the pier 2 are laid in a substantially flat shape to constitute the passage surface, so that the rigidity of the passage surface is increased. It can be strong against waves and high waves, and the wave surface of waves and waves can be reduced by the action of the water flow holes on the other side. There is no damage. Therefore, according to this pier 2, coastal construction is possible if there is some wave. Moreover, since there is no lining board, a clearance gap increases in each connection part of the horizontal beam 22 and the vertical beam 23, and workability | operativity can be improved significantly.

また、この構造及び工法では、桟橋の乗り入れ部１の周囲に複数の鋼矢板１１、…を打設し、これらの鋼矢板１１、…をタイロッド方式により支承するので、乗り入れ部１の盛土の流出を少なくして、乗り入れ部１の管理、及び復旧作業を大幅に軽減することができる。しかも、このタイロッド方式による合成強度により、各鋼矢板１１に小さく軽量のものを用いることができ、乗り入れ部１を簡易かつ経済的（低コスト）に形成することができる。   Further, in this structure and construction method, a plurality of steel sheet piles 11,... Are placed around the pier entry part 1, and these steel sheet piles 11,. Can be reduced, and the management and restoration work of the entry section 1 can be greatly reduced. In addition, due to the combined strength by this tie rod method, small and lightweight steel sheet piles 11 can be used, and the loading portion 1 can be formed simply and economically (low cost).

さらに、この構造及び工法では、土留３を複数の親杭３１、…を工事領域の周囲に沿って所定の間隔に打設して、複数の鉄板３２、…をそれぞれ各親杭３１、…間に各親杭、…間の各ジョイント３３、…に嵌め込むことにより設置するので、土留３を小さな材料で対応可能な単純な構造により設置することができ、土留３を簡易かつ短時間に、しかも経済的（低コスト）に設置又は撤去することができる。この場合、各親杭３１、…間に所定の間隔があり、それぞれを連結していないので、波浪に強く、また、各鉄板３２、…を各親杭３１、…のジョイント３３、…間に嵌め込むだけなので、波浪状況に応じて施工手順を決定又は変更することができ、施工性が極めてよい。さらに、複数の鉄板３２、…を複数の親杭３１、…間に挟持式のジョイント３３、…を介して支持するようにしたので、軽量の鉄板３２を使用しても、波浪を確実に防止することができる。   Furthermore, in this structure and construction method, a plurality of parent piles 31 are placed at predetermined intervals along the periphery of the construction area, and a plurality of iron plates 32 are respectively placed between the parent piles 31. Since each of the parent piles is installed by being fitted into each joint 33 between, the earth retaining 3 can be installed with a simple structure capable of handling with a small material, and the earth retaining 3 can be easily and in a short time. Moreover, it can be installed or removed economically (low cost). In this case, there is a predetermined interval between the parent piles 31,..., And they are not connected to each other, so that they are resistant to waves, and the iron plates 32,... Are connected between the joints 33,. Since it is only fitted, the construction procedure can be determined or changed according to the wave condition, and the workability is extremely good. Furthermore, since a plurality of iron plates 32,... Are supported via a plurality of parent piles 31,... Sandwiched joints 33,. can do.

なお、この実施の形態で採用された各種の型鋼や鉄板はこれに限定されるものではなく、同じ構成、機能を有する限り、他の材料に変更可能であることは言うまでもない。   In addition, it is needless to say that various types of steel and iron plates employed in this embodiment are not limited to this, and can be changed to other materials as long as they have the same configuration and function.

１ 桟橋の乗り入れ部
１１ 鋼矢板
１２ 鉄板
２ 桟橋
２１ 柱杭
２１１ ブレース
２２ 横桁
２３ 縦桁
２４ 手摺
３ 土留
３１ 親杭
３２ 平板（鉄板）
３３ ジョイント
３３１、３３１ 挟持部
３４ 塞ぎ部材
３５ 繋ぎジョイント
３６ 吊り下ろし金具
３７ ワイヤ
３８ 玉賭け用フック
Ａ 塩水取水設備
ａ ポンプ場
ｂ 海側の送水管
ｃ 陸側の送水管
ｄ 取水管
ｅ 架台
ｆ 橋脚
ｇ 除砂装置
Ｌ 浜線（沿岸部の基線） DESCRIPTION OF SYMBOLS 1 Pier pier 11 Steel sheet pile 12 Iron plate 2 Pier 21 Pillar pile 211 Brace 22 Horizontal girder 23 Vertical girder 24 Handrail 3 Dust 31 Parent pile 32 Flat plate (Iron plate)
33 Joints 331, 331 Nipping part 34 Closing member 35 Connecting joint 36 Hanging metal fittings 37 Wire 38 Ball betting hook A Salt water intake equipment a Pumping station b Sea side water supply pipe c Land side water supply pipe d Intake pipe e Mounting base f Pier g Sand removal device L Beach (baseline of coastal area)

Claims (7)

沿岸工事に伴い、沿岸部の基線から沿岸部の工事領域まで桟橋を仮設して作業用通路を通すとともに、前記工事領域の周囲に土留を仮設して沿岸水域の波浪を防止する、沿岸工事の付帯設備仮設構造において、
桟橋は、
前記沿岸部の基線と前記沿岸部の工事領域までの間に並列に所定の間隔で打設される複数の柱杭と、
前記複数の柱杭の上に前記桟橋の幅方向に向けて前記桟橋の延びる方向に並列に架設される複数の横桁と、
前記複数の横桁上に前記桟橋の幅方向に並列にかつ前記桟橋の延びる方向に連続的に架設される複数の縦桁と、
を備え、
前記複数の縦桁は当該各縦桁に通水孔が穿たれて、前記桟橋の幅方向に相互に近接して前記桟橋の延びる方向に相互に連接して敷設される、
ことを特徴とする沿岸工事の付帯設備仮設構造。 Along with coastal construction, a temporary pier is constructed from the coastal baseline to the coastal construction area to pass through the work passage, and a sediment is temporarily built around the construction area to prevent waves in the coastal water area. In the incidental equipment temporary structure,
The pier
A plurality of pillar piles driven in parallel at a predetermined interval between the base line of the coastal area and the construction area of the coastal area;
A plurality of cross girders laid in parallel in the direction of the pier in the width direction of the pier on the plurality of pillar piles;
A plurality of vertical beams arranged in parallel in the width direction of the pier on the plurality of cross beams and continuously in the extending direction of the pier;
With
The plurality of vertical girders are pierced with water passage holes in the respective vertical girders, and are laid in close proximity to each other in the width direction of the pier and connected to each other in the direction in which the pier extends.
Temporary structure of incidental facilities for coastal construction. 柱杭、横桁、縦桁はＨ型鋼が採用される請求項１に記載の沿岸工事の付帯設備仮設構造。   The auxiliary structure for coastal construction according to claim 1, wherein the pillar pile, the horizontal girder, and the vertical girder are made of H-shaped steel. 沿岸部の基線上所定の位置から前記沿岸部の内方に向けて所定の範囲の周囲に複数の矢板が打設され、当該領域内が盛土され、鉄板が敷設されてなる桟橋の乗り入れ部を備え、前記矢板がタイロッド方式により支承される請求項１又は２に記載の沿岸工事の付帯設備仮設構造。   A plurality of sheet piles are placed around a predetermined range from a predetermined position on the base line of the coastal area toward the inside of the coastal area, and the entrance portion of the pier where the area is embanked and an iron plate is laid is provided. The auxiliary structure for coastal construction according to claim 1 or 2, wherein the sheet pile is supported by a tie rod system. 土留は、
工事領域の周囲に沿って所定の間隔に打設される複数の親杭と、
前記各親杭間に設置される波浪防止用の複数の平板と、
を備え、
前記各親杭は隣り合う各々の相互に対向する面に上下方向に延びる一対の挟持部からなるジョイントを有し、
前記各平板は前記各親杭間に前記各ジョイント間に嵌め込まれて設置される、
請求項１乃至３のいずれかに記載の沿岸工事の付帯設備仮設構造。 Doji is
A plurality of parent piles driven at predetermined intervals along the periphery of the construction area;
A plurality of flat plates for preventing waves installed between the parent piles;
With
Each of the parent piles has a joint composed of a pair of sandwiching portions extending in the vertical direction on the surfaces facing each other adjacent to each other.
Each flat plate is installed by being fitted between the joints between the parent piles.
A temporary structure for incidental facilities for coastal construction according to any one of claims 1 to 3. 親杭はＨ型鋼、平板は鉄板、ジョイントはＬ型鋼がそれぞれ採用される請求項１乃至４のいずれかに記載の沿岸工事の付帯設備仮設構造。   The auxiliary construction for coastal construction according to any one of claims 1 to 4, wherein the main pile is an H-shaped steel, the flat plate is an iron plate, and the joint is an L-shaped steel. 沿岸工事に伴い、沿岸部の基線から沿岸部の工事領域まで桟橋を仮設して作業用通路を通すとともに、前記工事領域の周囲に土留を仮設して沿岸水域の波浪を防止する、沿岸工事の付帯設備仮設工法において、
桟橋の仮設は、
複数の柱杭、横桁、及び通水孔を設けた縦桁を用い、
前記複数の柱杭を前記沿岸部の基線と前記沿岸部の工事領域との間に並列に所定の間隔で打設し、
前記複数の柱杭の上に前記複数の横桁を前記桟橋の幅方向に向けて前記桟橋の延びる方向に並列に架設して、
前記複数の横桁上に前記複数の縦桁を前記桟橋の幅方向に並列に相互に近接して、かつ前記桟橋の延びる方向に相互に連接して敷設する、
ことを特徴とする沿岸工事の付帯設備仮設工法。 Along with coastal construction, a temporary pier is constructed from the coastal baseline to the coastal construction area to pass through the work passage, and a sediment is temporarily built around the construction area to prevent waves in the coastal water area. In the incidental equipment temporary construction method,
The temporary construction of the pier
Using vertical pillars with multiple pillar piles, horizontal girders, and water holes,
Placing the plurality of pillar piles at a predetermined interval in parallel between the base line of the coastal area and the construction area of the coastal area,
On the plurality of pillar piles, the plurality of cross beams are laid in parallel in the direction in which the pier extends in the width direction of the pier,
Laying the plurality of longitudinal girders on the plurality of transverse girders in close proximity to each other in parallel in the width direction of the jetty and connected to each other in the extending direction of the jetty;
Temporary construction method for incidental facilities for coastal construction. 土留の仮設は、上下方向に延びる一対の挟持部からなるジョイントを設けた複数の親杭と、波浪防止用の複数の平板を用い、前記複数の親杭を工事領域の周囲に沿って所定の間隔に隣り合う各親杭の各ジョイントを相互に対向させつつ打設して、前記各平板を前記各親杭間に前記各ジョイント間に嵌め込むことにより設置する請求項６に記載の沿岸工事の付帯設備仮設工法。   Temporary construction of the earth retaining uses a plurality of parent piles provided with joints composed of a pair of sandwiching portions extending in the vertical direction and a plurality of flat plates for preventing waves, and the plurality of parent piles are arranged along a periphery of the construction area with a predetermined length. The coastal construction according to claim 6, wherein each joint of each parent pile adjacent to the interval is placed while facing each other, and each flat plate is installed by fitting between each joint between each parent pile. Ancillary equipment temporary construction method.

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