JP4925092B2 - Temporary scaffolding for coastal construction - Google Patents

Temporary scaffolding for coastal construction Download PDF

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JP4925092B2
JP4925092B2 JP2006076075A JP2006076075A JP4925092B2 JP 4925092 B2 JP4925092 B2 JP 4925092B2 JP 2006076075 A JP2006076075 A JP 2006076075A JP 2006076075 A JP2006076075 A JP 2006076075A JP 4925092 B2 JP4925092 B2 JP 4925092B2
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work stage
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temporary scaffold
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肇一 田中
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Fudo Tetra Corp
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本発明は、特に、河川や海辺に構築された水上構造物近傍における水側で各種作業を行うための移動式の水際工事用仮設足場に関するものである。なお、本明細書において、「水上構造物」とは締切り工や橋梁などを総称するものである。「締切り工」とは、鋼矢板や鋼管矢板などの仮設締切り工のほか、本設の防波堤や堤防なども含む。     In particular, the present invention relates to a mobile temporary construction scaffold for performing various operations on the water side in the vicinity of a floating structure constructed on a river or seaside. In the present specification, the “water structure” is a general term for a cut-off work, a bridge, and the like. “Cut-off work” includes temporary cut-off works such as steel sheet piles and steel pipe sheet piles, as well as permanent breakwaters and dikes.

河川改修工事や臨海の埋立工事などにおいては、鋼矢板等の締切り工を基礎地盤まで建て込んで水辺と陸地間を締切ったり水路間を仕切るようにしている。締切った後は、例えば、締切り工近傍の水底や海底地盤の地盤改良や浚渫作業などを行う。そのような場合は、水深が浅かったり水路が狭いと、大形の専用重機船を投入することが不可能となる。そこで、従来では、図７に例示したように、鋼矢板１に隣接して水底に建て込まれ、かつブレース１００により補強された複数の仮設柱１０１の上部に仮設足場１０２となる作業ステージを構築し、この作業ステージ上に施工用重機１０３、ボーリングマシン１０４などを設置し、水底下に向けてそれぞれ目的の施工を行うようにしている。なお、この関連技術として、特許文献１にはメインフレームと鋼杭を交互に組付けて沖合に延ばす仮設桟橋の施工方法が開示されている。   In river renovation work and seaside landfill work, steel sheet piles and other deadlines are built up to the foundation ground to close the waterside and land and partition the waterways. After the deadline, for example, ground improvement or dredging work is performed on the water bottom or seabed near the deadline. In such a case, if the water depth is shallow or the water channel is narrow, it is impossible to introduce a large dedicated heavy machinery ship. Therefore, conventionally, as illustrated in FIG. 7, a work stage is constructed which becomes a temporary scaffold 102 on a plurality of temporary pillars 101 which are built on the bottom of the water adjacent to the steel sheet pile 1 and reinforced by the braces 100. Then, the construction heavy machine 103, the boring machine 104, and the like are installed on the work stage, and the intended construction is performed under the water bottom. As this related technique, Patent Document 1 discloses a construction method for a temporary jetty in which main frames and steel piles are alternately assembled and extended offshore.

また、従来の他の仮設足場として、図８に示すように、係留式のフロート１０６（浮体）を水面上に浮かせ、その一端側をロープなどを介して鋼矢板１側に係留し、他端側を水底にアンカーを介して係留させるようにしたものもある。このフロート１０６上には、前述のごとき重機や設備などを設置し、それらで水底に向けて施工を行うものもある。このフロート式仮設足場では、アンカーを引き上げた後、陸上側からロープ牽引により隣工区に移動できる。なお、この関連技術として、特許文献２に示す桟橋構造物を対象とした作業用装置がある。この装置要部は、浮体上部に昇降可能なステージを設けるとともに、桟橋の支持杭にグリッパを介して連結したものである。 As another conventional temporary scaffold, as shown in FIG. 8, a mooring type float 106 ( floating body) is floated on the water surface, and one end side thereof is moored to the steel sheet pile 1 side via a rope or the like, and the other end Some are moored to the bottom of the water via anchors. On the float 106 , there are some which are installed with heavy machinery or equipment as described above and work toward the bottom of the water with them. In this float type temporary scaffolding, the anchor can be lifted and then moved to the adjacent work area by rope towing from the land side. In addition, as this related technique, there is a working device for a jetty structure shown in Patent Document 2. The main part of the apparatus is provided with a stage that can be raised and lowered at the upper part of the floating body, and is connected to a support pile of a pier via a gripper.

特開２００５−８３１７９号公報JP 2005-83179 A 特開平１０−３２５１２６号公報Japanese Patent Laid-Open No. 10-325126

図７に示される仮設足場１０２では、組み立てられた区域内での施工を完了した後、隣工区に移る際の手順として、重機や設備の撤去、足場の解体撤去、及び再構築、再搬入等の作業が必要となり、作業能率が悪いものとなる。なお、特許文献１に示される施工方法を応用すれば、仮設足場を隣工区に構築しつつ連続施工を行うことが可能であるが、その場合にもやはり撤去作業などに時間と手間がかかる。   In the temporary scaffold 102 shown in FIG. 7, after completing the construction in the assembled area, as a procedure for moving to the adjacent work area, removal of heavy machinery and equipment, dismantling and removal of the scaffold, reconstruction, re-loading, etc. Therefore, the work efficiency is poor. In addition, if the construction method shown by patent document 1 is applied, it is possible to perform continuous construction, constructing a temporary scaffold in the adjacent work area, but also in that case, it takes time and labor for the removal work.

図８に示される仮設足場では、浮力を得るために大きな面積が必要であり、例えば、河川に浮べた場合には川幅がフロート１０６に占有されてしまうため河川を航行する他の船舶の航路障害要因となり、またフロート上を重機などが移動すると荷重の偏在により傾斜しやすいという問題などがある。なお、特許文献２に示される装置は、仮設桟橋の下側での作業用に特化したもので、本発明対象である河川や海辺に構築された水上構造物付近の仮設足場に応用できない。 The temporary scaffold shown in FIG. 8 requires a large area to obtain buoyancy. For example, when floating on a river, the width of the river is occupied by the float 106, and therefore, the channel obstruction of other ships that navigate the river. There is a problem that when a heavy machine or the like moves on the float, it tends to be inclined due to uneven distribution of the load. The device disclosed in Patent Document 2 is specialized for work under the temporary pier, and cannot be applied to a temporary scaffold in the vicinity of a floating structure constructed on the river or the sea that is the subject of the present invention.

本発明の目的は、以上の課題を解決するもので、例えば、川幅を大きく占有することなく、構築が簡単で移動も良好となる水際工事用仮設足場を提供することにある。   An object of the present invention is to solve the above-described problems. For example, it is an object of the present invention to provide a temporary scaffold for coastal construction that does not occupy a large river width and is easy to construct and good in movement.

前記目的を達成するため本発明の水際工事用仮設足場は、河川や海辺に構築された鋼矢板又は堤防である水上構造物近傍における水側で各種作業を行うための移動式の水際工事用仮設足場であって、前記水上構造物近傍の水面上に浮遊状態に配置された台船と、前記水上構造物に支持され、かつその水上構造物に沿って水平方向に移動可能に配置された移動体と、一端が前記台船に設けられた支持体に対し昇降可能に連結支持されるとともに、他端が前記移動体に対しヒンジ部を介して揺動可能に連結支持されている作業ステージとを備え、前記作業ステージ上に機器類などを設置した状態で、前記台船と移動体並びに作業ステージを前記水上構造物に沿って一体ものとして移動可能にしたことを特徴としている。 In order to achieve the above object, the temporary scaffold for the waterside construction of the present invention is a mobile temporary construction for the waterside construction for performing various operations on the water side in the vicinity of the floating structure which is a steel sheet pile or a dike constructed on the river or seaside. A scaffold, which is a scaffold, placed in a floating state on the water surface near the water structure , and a movement supported by the water structure and arranged to be movable in the horizontal direction along the water structure and body, one end is vertically movably connected to and supported relative to the support provided in the barge, the work stage and the other end is swingably connected to and supported through the hinge portion against the moving body And the carriage, the movable body, and the work stage can be moved integrally along the water structure in a state in which equipment and the like are installed on the work stage.

以上の水際工事用足場は、例えば、水上構造物が鋼矢板や鋼管矢板などの締切り工の場合、該締切り工付近の水底または海底地盤の土質調査、地盤改良、浚渫作業等を締切り工に沿って連続して行うときに有効となる。    For example, when the above-mentioned scaffold for waterside construction is a cut-off work such as a steel sheet pile or steel pipe sheet pile, the soil investigation, ground improvement, dredging work, etc. in the vicinity of the cut-off work is performed in accordance with the cut-off work. This is effective when performed continuously.

以上の本発明にあっては次のように具体化されることが好ましい。すなわち、前記支持体に対し前記作業ステージの一端を昇降調整する油圧シリンダと、前記作業ステージに配置された傾斜センサとを少なくとも有し、前記傾斜センサの計測値が常時ほぼ水平を指示すように前記油圧シリンダが伸縮制御される構成である（請求項２）。 In the present invention described above, it is preferable to be embodied as follows . That is, a hydraulic cylinder over the previous SL support for lifting adjust one end of the work stage having at least a tilt sensor disposed on the working stage, the measurement value of the inclination sensor is so instructs a substantially horizontal at all times Further, the hydraulic cylinder is controlled to extend and contract (claim 2 ).

請求項１の発明では、例えば、台船を選択することで浅瀬などにも対応しやすく、河川などの場合に川幅を大きく占有しなくてもよくなり、作業ステージごと移動できるため工区の移動を効率よく行え、移動作業に伴う施工用重機や設備などの機器類の解体や再組立などの手間を省力化することができる。これにより、本発明の水際工事用仮設足場は、例えば、水上構造物が鋼矢板や鋼管矢板などの締切り工の場合、締切り工付近の水底または海底地盤の土質調査、地盤改良、浚渫作業などを連続して効率よく施工できるようにする。また、水上構造物が橋梁などの場合、前記作業ステージを利用して、橋の強度検査や補修工事、或いは塗装工等を連続的に効率よく施工できるようにする。   In the invention of claim 1, for example, it is easy to cope with shallow waters by selecting a trolley, and it is not necessary to occupy a large river width in the case of rivers, etc. It is efficient and can save labor for dismantling and reassembling equipment such as heavy equipment and equipment for construction. As a result, the temporary scaffold for coastal construction according to the present invention, for example, when the floating structure is a cut-off work such as a steel sheet pile or a steel pipe sheet pile, conducts soil investigation, ground improvement, dredging work, etc. in the vicinity of the cut-off work. Make it possible to construct continuously and efficiently. When the floating structure is a bridge or the like, the work stage is used so that the bridge strength inspection, repair work, or painter can be continuously and efficiently constructed.

請求項２の発明では、請求項１の作用・効果に加え、例えば、干満差や波浪などに起因する作業ステージの傾斜や動揺を未然に防止可能にして、作業ステージを常に最適な水平状態に維持できるようにする。 The inventions of claim 2, in addition to the operation and effect of claim 1, for example, the tilt and sway of the work stage due like tidal difference and wave and enables prevented, always optimal horizontal state working stage To be able to maintain.

（第１形態）図１〜図４は本発明の第１形態を示すもので、図１はボーリングマシンにより地盤調査している状態を模式的に示す一部拡大図を含む斜視図、図２は地盤調査結果に基づき地盤改良している状態を模式的に示す断面図、図３は図２のＡ矢視方向における模式側面図、図４（ａ），（ｂ）は干満差による作業ステージの水平調整を行っている状態を示す模式断面図である。 (First Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention, and FIG. 1 is a perspective view including a partially enlarged view schematically showing a ground investigation state by a boring machine, FIG. sectional view showing a state of ground improvement based on the ground survey results schematically, the Figure 3 is a schematic side view of a arrow direction in FIG. 2, FIG. 4 (a), (b) the work by tidal difference It is a schematic cross section which shows the state which is performing the horizontal adjustment of a stage.

図１〜図４において、符号１は連続壁である鋼矢板、符号２は本発明を適用した水際工事用仮設足場である。鋼矢板１は、陸上部と河川との境界部に沿って、地盤基礎側まで多数建て込まれて一列に配列されている。仮設足場２は、河川側にあって、鋼矢板１の配列方向に沿って移動可能に設けられている。   1-4, the code | symbol 1 is a steel sheet pile which is a continuous wall, and the code | symbol 2 is a temporary scaffold for the waterside construction to which this invention is applied. A large number of steel sheet piles 1 are built up to the ground foundation side and arranged in a line along the boundary between the land and the river. The temporary scaffold 2 is provided on the river side so as to be movable along the arrangement direction of the steel sheet piles 1.

すなわち、仮設足場２は、鋼矢板１に沿って河川の水面上に浮遊状態に配置された台船３と、鋼矢板１上に跨設した状態で支持されるとともに、鋼矢板１の配列方向つまり水平方向に沿って移動可能な移動体４と、台船３の略中央部に突設された下支持体５及び該下支持体５に昇降可能に嵌合された上支持体６と、上下支持体５，６の内部にあって、両者間に介在された昇降用の油圧シリンダ７と、上支持体６と移動体４との間に連結支持されている作業ステージ８とを備えている。   That is, the temporary scaffold 2 is supported in a state where the temporary scaffolding 2 is suspended on the water surface of the river along the steel sheet piles 1 and the steel sheet piles 1 and is arranged in the arrangement direction of the steel sheet piles 1. That is, the movable body 4 that can move along the horizontal direction, the lower support 5 that protrudes from the substantially central portion of the carriage 3, and the upper support 6 that is fitted to the lower support 5 so as to be movable up and down, Inside the upper and lower supports 5, 6, an elevating hydraulic cylinder 7 interposed between them and a work stage 8 connected and supported between the upper support 6 and the movable body 4 are provided. Yes.

このうち、台船３は、大型トラックなどにより施工現場まで搬送可能な縦横寸法であり、前記河川の水深に応じた浅喫水の曳航式台船が用いられる。これに対し、移動体４は、例えば、技研製作所製の商品名サイレントパイラーと類似した構造の走式矢板圧入装置である。この装置特徴は、鋼矢板１の上縁に跨設した状態で支持されるサドル部１０と、サドル部１０の下両側に突設されて、図２のごとく鋼矢板１の両側部を挟持してサドル部１０を鋼矢板１上に強固に拘束する複数の固定用クランプ１１と、サドル部１０の前方両側に出没可能に配置されて鋼矢板１の両側を挟持する不図示の前後進用クランプとを備えている。そして、この装置（移動体４）は、サドル部１０の一側部がヒンジ部９を介して作業ステージ８の他端に揺動可能に連結支持された状態で、台船３の移動に連動させて、固定用クランプ１１を両側部から離間するとともに、前後進用クランプを駆動制御することで（鋼矢板１に反力を取って）尺取虫状に移動される。なお、この例では、鋼矢板１の片側が陸上部になっている。その陸上部側には、例えば、この移動体４とともに移動可能な油圧装置１２が配置され、油圧ホース１３などを介して移動体４に駆動動力を供給している。   Of these, the trolley 3 has vertical and horizontal dimensions that can be conveyed to a construction site by a large truck or the like, and a shallow draft towed trolley according to the water depth of the river is used. On the other hand, the moving body 4 is, for example, a traveling type sheet pile press-in device having a structure similar to a trade name Silent Piler manufactured by Giken. This device is characterized by a saddle portion 10 supported in a state of straddling the upper edge of the steel sheet pile 1, and projecting on both lower sides of the saddle portion 10 to sandwich both side portions of the steel sheet pile 1 as shown in FIG. And a plurality of fixing clamps 11 for firmly restraining the saddle portion 10 on the steel sheet pile 1 and a forward / backward clamp (not shown) that is disposed so as to be able to protrude and retract on both front sides of the saddle portion 10 and sandwiches both sides of the steel sheet pile 1. And. The apparatus (moving body 4) is interlocked with the movement of the carriage 3 in a state in which one side of the saddle portion 10 is swingably connected to the other end of the work stage 8 via the hinge portion 9. Thus, the fixing clamp 11 is moved away from the both sides, and is moved in the form of a worm by driving and controlling the forward / rearward movement clamp (using a reaction force on the steel sheet pile 1). In this example, one side of the steel sheet pile 1 is a land portion. On the land portion side, for example, a hydraulic device 12 movable with the moving body 4 is disposed, and driving power is supplied to the moving body 4 via a hydraulic hose 13 or the like.

作業ステージ８は、上支持体６に対し一端が連結支持され、かつ他端が移動体４に対しヒンジ部９を介して揺動可能に連結支持されている。また、作業ステージ８は、上側適宜位置に配設された不図示の傾斜センサと、該傾斜センサの出力信号を受信して当該傾斜センサの値が常に水平（所定範囲の水平度）を指示するように前記油圧シリンダ７を伸縮制御するための不図示のフィードバック制御手段とを有している。そして、以上の足場構造では、例えば、図４（ａ）に示したように、前記制御手段により、満潮時（ＨＷＬ）には油圧シリンダ７は縮小し、図４（ｂ）に示したように、干潮時（ＬＷＬ）には油圧シリンダ７は伸張し、その結果、作業ステージ８が常にほぼ水平に保たれて上支持体６と移動体４との間に支持され、これによって干満の潮位差Ｈによる作業ステージ８の不用意な傾斜が防止可能となる。   The work stage 8 has one end connected and supported to the upper support 6 and the other end connected to and supported by the movable body 4 via a hinge portion 9 so as to be swingable. In addition, the work stage 8 receives a tilt sensor (not shown) disposed at an appropriate position on the upper side and an output signal of the tilt sensor, and indicates that the value of the tilt sensor is always horizontal (a predetermined range of horizontality). In this way, it has feedback control means (not shown) for controlling the expansion and contraction of the hydraulic cylinder 7. In the above scaffold structure, for example, as shown in FIG. 4 (a), the hydraulic cylinder 7 is reduced by the control means at high tide (HWL), as shown in FIG. 4 (b). At low tide (LWL), the hydraulic cylinder 7 extends, and as a result, the work stage 8 is always kept substantially horizontal and is supported between the upper support 6 and the movable body 4, thereby the difference in tide level Inadvertent tilting of the work stage 8 due to H can be prevented.

なお、以上のような機能は、干満のようなゆっくりとした潮位差だけでなく、海沿いで使用した場合に受ける波浪や、台船３の付近を他の船舶や舟艇が航行することによる敷浪によっても台船３は上下に揺動するが、それら一時的な揺動に対しても油圧シリンダ７の伸縮制御により作業ステージ８がほぼ水平に維持されるようにする。   The functions described above are not only a slow tide level difference such as tidal flow, but also the waves received when used along the sea, and the laying caused by other ships and boats navigating the vicinity of the carriage 3. As a result, the carriage 3 swings up and down, but the work stage 8 is maintained substantially horizontal by the expansion and contraction control of the hydraulic cylinder 7 even with respect to the temporary swing.

（作動）以上の仮設足場２において、図１では、作業ステージ８上にボーリングマシン１４が配置され、水底地盤に向けて採取用パイプ１５を貫入してボーリング調査を行っている状態を示している。このボーリングマシン１４は、作業ステージ８の長手方向に沿って移動可能であって、鋼矢板１の近傍から、作業ステージ８上の最も離れた位置までの間の数カ所でサンプル採取を行えるようになっている。 (Operation) In the temporary scaffold 2 described above, FIG. 1 shows a state where the boring machine 14 is disposed on the work stage 8 and the boring survey is conducted by penetrating the sampling pipe 15 toward the bottom of the ground. . The boring machine 14 can move along the longitudinal direction of the work stage 8 and can take samples at several points from the vicinity of the steel sheet pile 1 to the farthest position on the work stage 8. ing.

この採取結果に基づき鋼矢板１の近傍の地層特性が把握され、改良すべき地層の状態や、その状態に基づく改良すべき深度分布などが設計可能となる。以上の採取動作に引続き、図２〜図４に示すごとく、例えば、仮設足場２に後続して移動する同一の仮設足場２の作業ステージ８上に設置された地盤改良用重機１６を用いた地盤改良作業がなされる。   Based on this sampling result, the formation characteristics near the steel sheet pile 1 are grasped, and the state of the formation to be improved and the depth distribution to be improved based on the state can be designed. 2 to 4, for example, the ground using the ground improvement heavy machine 16 installed on the work stage 8 of the same temporary scaffold 2 that moves following the temporary scaffold 2 as shown in FIGS. Improvement work is done.

この重機１６は、例えば、作業ステージ８の長手方向に沿って移動可能なベースマシン１７と、ベースマシン１７の先端部にあって作業ステージ８の側縁に鉛直に立設されたガイドポスト１８と、ガイドポスト１８に対して回転かつ昇降可能に配置された掘削用ケーシング１９と、ケーシング１９の先端に設けられてケーシング内を通じて供給される改良剤などとともに地盤下の所定深度まで混合攪拌するためのオーガ部２０とを備えている。   The heavy machine 16 includes, for example, a base machine 17 that can move along the longitudinal direction of the work stage 8, and a guide post 18 that stands vertically at the side edge of the work stage 8 at the tip of the base machine 17. The excavating casing 19 is arranged so as to be able to rotate and move up and down with respect to the guide post 18, and the improvement agent provided at the front end of the casing 19 and supplied through the casing for mixing and stirring to a predetermined depth below the ground. And an auger section 20.

なお、ケーシング１９には、供給管が内設されており、該供給管に対しスイベルジョイント２１及びグラウトポンプ２２などを介して製造プラント２３で製造された改良剤が供給される。実施工では、このように改良剤を供給し注入しつつ、地盤内を所定深度まで攪拌混合することにより、地盤内にはソイルセメント柱などが造成される。このようにして一回の地盤改良作業が終了したら、重機を移動して次の改良範囲の上部に位置して同一作業を行うことにより、矢板１の近傍からステージ８上の最も離れた位置の数カ所で連続したソイルセメント柱列などが造成されることになる。   In addition, a supply pipe is provided in the casing 19, and the improving agent manufactured in the manufacturing plant 23 is supplied to the supply pipe via the swivel joint 21 and the grout pump 22. In the construction work, a soil cement column or the like is formed in the ground by stirring and mixing the ground to a predetermined depth while supplying and injecting the improving agent. When the ground improvement work is completed once in this way, the heavy machine is moved and positioned at the upper part of the next improvement range and the same work is performed, so that the position farthest from the sheet pile 1 on the stage 8 is reached. A series of soil cement columns will be created in several places.

また、図２と図４では、説明の便宜上、同一の作業ステージ８に重機１６と製造プラント２３を共存させた状態に設置した。但し、構造的には、製造プラント２３を台船１上に設置しても良いし、台船１の浮力などの関係で製造プラント２３を当該仮設足場２から分離し、特に図３に例示したように、後続して当該台船３に曳航される同形又は類似の台船３上に設置し、ホース２４などを介して重機１６側に接続することが望ましい。 In FIGS. 2 and 4, for convenience of explanation, the heavy machine 16 and the manufacturing plant 23 are installed in the same work stage 8 in a coexisting state. However, structurally, the manufacturing plant 23 may be installed on the carriage 1 or the manufacturing plant 23 is separated from the temporary scaffold 2 due to the buoyancy of the carriage 1, and particularly illustrated in FIG. As described above, it is desirable to install on a similar or similar carrier 3 to be subsequently towed by the carrier 3 and connect to the heavy machinery 16 side via a hose 24 or the like.

従って、以上の形態例では、例えば、鋼矢板１の建て込み開始後に、これに後続して仮設足場２の搬入と組立及び、これに後続する改良剤用の製造用台船などを投入すれば、鋼矢板１の建て込み作業に後続して連続的に矢板近辺の水面下の地質調査と、該調査結果に基づいた地盤改良作業を連続的に行うことができ、最終の作業終点位置でのみ、それぞれの解体撤去を行うだけよく作業効率を飛躍的に向上できる。   Accordingly, in the above embodiment, for example, after the start of the construction of the steel sheet pile 1, the temporary scaffolding 2 can be subsequently carried in and assembled, and the manufacturing carrier for the improving agent can be subsequently introduced. Following the construction work of the steel sheet pile 1, it is possible to continuously perform geological surveys under the surface of the water near the sheet piles and ground improvement work based on the survey results, only at the final work end position The work efficiency can be drastically improved by simply dismantling and removing each.

（第２形態）図５は、前記鋼矢板１によって、例えば、河川を左右二つの水路に仕切るような場合の一例を示している。なお、この説明では、第１形態と同一又は類似の部材や箇所には同一符号を付して、重複した説明を極力省く。図５において、鋼矢板１を挟む左右の水路には、台船３がそれぞれ配置されるとともに、仮設足場２が各台船３と移動体４とを利用して鋼矢板１の両側に設けられている。各仮設足場２は、鋼矢板１上に跨設された移動体４を共通の移動及び片側支持手段として活用しており、各作業ステージ８が移動体４の両側部に対応する他端をヒンジ部９を介してそれぞれ揺動可能に連結支持されている。 (Second Mode) FIG. 5 shows an example in which the steel sheet pile 1 partitions a river into two right and left water channels. In this description, the same or similar members and parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted as much as possible. In FIG. 5, the left and right water channels sandwiching the steel sheet pile 1 are each provided with a base boat 3, and temporary scaffolds 2 are provided on both sides of the steel sheet pile 1 using each base boat 3 and the moving body 4. ing. Each temporary scaffold 2 utilizes the movable body 4 straddling the steel sheet pile 1 as a common movement and one-side support means, and each work stage 8 has the other end corresponding to both sides of the movable body 4 Each of them is connected and supported so as to be swingable through the joint portion 9 .

図５では、各作業ステージ８上にボーリングマシン１４を搭載し、その採取用パイプ１５を水底地盤に貫入して地盤調査を行っている状態を示しているが、同一の仮設足場２を後続させ、各作業ステージ８に搭載された重機を用いて地盤改良を行うことができることは勿論である。また、図示しないが、移動体４に駆動動力を与えるための油圧装置などはいずれか一方の作業ステージ８上に設置すればよい。以上の第２形態では、例えば、鋼矢板１によって２つに仕切られた水路内の鋼矢板１近傍における水底地盤の土質調査、地盤改良などを同時かつ連続して行うことができる。   FIG. 5 shows a state in which the boring machine 14 is mounted on each work stage 8 and the sampling pipe 15 penetrates into the water bottom ground, and the ground investigation is performed, but the same temporary scaffold 2 is followed. Of course, it is possible to improve the ground using heavy equipment mounted on each work stage 8. Although not shown, a hydraulic device or the like for applying driving power to the moving body 4 may be installed on either one of the work stages 8. In the above second embodiment, for example, soil investigation and ground improvement of the bottom soil in the vicinity of the steel sheet pile 1 in the water channel partitioned into two by the steel sheet pile 1 can be performed simultaneously and continuously.

（第３形態）図６は、堤防近辺の地盤改良に適用した構成例を示している。なお、この説明でも、第１形態と同一又は類似の部材や箇所には同一符号を付して、重複した説明を極力省くことにする。図６において、堤防３０の提頂（上壁）における海側縁部には、仮設軌条３１がその提長方向に沿って敷設され、この軌条３１上に強固に拘束支持されつつ、その長手方向に沿って移動可能な移動体３２が配置され、この移動体３２の海側側部はヒンジ部９を介して作業ステージ８の他端に連結している。 (Third embodiment) FIG. 6 shows a configuration example applied to ground improvement in the vicinity of a bank. In this description as well, the same or similar members and places as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted as much as possible. In FIG. 6, a temporary rail 31 is laid along the lengthwise direction at the sea side edge portion at the top (upper wall) of the embankment 30, and the longitudinal direction of the railroad 31 is firmly restrained and supported on the rail 31. A movable body 32 that can move along the line is disposed, and the sea side portion of the movable body 32 is connected to the other end of the work stage 8 via a hinge portion 9.

なお、図６では、作業ステージ８上に重機１６を搭載して堤防３０の近辺の海底地盤の地盤改良を行っているが、これに先立ち、必要に応じボーリングが実施される。また、各形態例では、鋼矢板１あるいは堤防３０近辺の水底地盤の地盤改良工法に適用した場合を示したが、これら締切り工近辺の水際における浚渫工事などにも適用でき、特にダムの提体近傍の浚渫作業用仮設足場として好適なものとなる。さらに本発明の仮設足場は、橋梁などの補修工事や塗装工などのにも適用展開できることも勿論である。   In FIG. 6, the heavy machinery 16 is mounted on the work stage 8 to improve the ground of the seabed near the embankment 30, but prior to this, boring is performed as necessary. Moreover, in each form example, the case where it applied to the ground improvement method of the bottom of the sea near the steel sheet pile 1 or the embankment 30 was shown. It is suitable as a temporary scaffold for the nearby dredging work. Furthermore, the temporary scaffold according to the present invention can be applied and expanded to repair work such as bridges and painters.

第１形態の仮設足場を示す一部拡大部を含む模式斜視図である。It is a model perspective view containing the partial expansion part which shows the temporary scaffold of a 1st form. 第１形態の仮設足場を断面した模式縦断面図である。It is the model longitudinal cross-sectional view which carried out the cross section of the temporary scaffold of a 1st form. 図２のＡ矢視における模式側面図である。It is a model side view in A arrow view of FIG. （ａ），（ｂ）は干満差による作業ステージの水平調整を示す断面図である。(A), (b) is sectional drawing which shows the horizontal adjustment of the work stage by a tidal difference. 第２形態の仮設足場を示す模式斜視図である。It is a model perspective view which shows the temporary scaffold of a 2nd form. 第３形態の仮設足場を示す模式断面図である。It is a schematic cross section which shows the temporary scaffold of a 3rd form. 従来の組立て式仮設足場を示す模式斜視図である。It is a model perspective view which shows the conventional assembly-type temporary scaffold. 従来のフロート式仮設足場を示す模式斜視図である。It is a model perspective view which shows the conventional float type temporary scaffold.

１・・・鋼矢板（水上構造物）
２・・・仮設足場
３・・・台船
４，３２・・・移動体
５，６・・・支持体（５は下支持体、６は上支持体）
７・・・油圧シリンダ
８・・・作業ステージ
９・・・ヒンジ部
１１・・・固定用クランプ
１４・・・ボーリングマシン
１５・・・採取用パイプ
１６・・・地盤改良用重機
３０・・・堤防（水上構造物） 1 ... Steel sheet pile (water structure)
2 ... Temporary scaffolding 3 ... Boat 4,32 ... Moving body 5,6 ... Support (5 is the lower support, 6 is the upper support)
DESCRIPTION OF SYMBOLS 7 ... Hydraulic cylinder 8 ... Work stage 9 ... Hinge part 11 ... Clamp for fixation 14 ... Boring machine 15 ... Pipe for sampling 16 ... Heavy machine for ground improvement 30 ... Embankment (water structure)

Claims (2)

河川や海辺に構築された鋼矢板又は堤防である水上構造物近傍における水側で各種作業を行うための移動式の水際工事用仮設足場であって、
前記水上構造物近傍の水面上に浮遊状態に配置された台船と、
前記水上構造物に支持され、かつその水上構造物に沿って水平方向に移動可能に配置された移動体と、
一端が前記台船に設けられた支持体に対し昇降可能に連結支持されるとともに、他端が前記移動体に対しヒンジ部を介して揺動可能に連結支持されている作業ステージとを備え、
前記作業ステージ上に機器類などを設置した状態で、前記台船と移動体並びに作業ステージを前記水上構造物に沿って一体ものとして移動可能にしたことを特徴とする水際工事用仮設足場。 A mobile scaffolding temporary scaffold for performing various operations on the water side in the vicinity of a floating structure that is a steel sheet pile or embankment built on a river or seaside,
A barge that is disposed on a floating state on water structure near above the water,
A movable body supported by the water structure and arranged to be movable in the horizontal direction along the water structure;
One end is vertically movably connected to and supported relative to the support provided in the barge, and a work stage which other end is swingably connected to and supported through the hinge portion against the moving body,
A temporary scaffold for waterside construction, wherein the carriage, the moving body, and the work stage can be moved integrally along the water structure in a state in which equipment or the like is installed on the work stage. 前記支持体に対し前記作業ステージの一端を昇降調整する油圧シリンダと、前記作業ステージに配置された傾斜センサとを少なくとも有し、前記傾斜センサの計測値が常時ほぼ水平を指示すように前記油圧シリンダが伸縮制御される請求項１に記載の水際工事用仮設足場。   The hydraulic pressure cylinder includes at least a hydraulic cylinder that adjusts one end of the work stage relative to the support, and a tilt sensor disposed on the work stage, and the hydraulic pressure is set so that the measured value of the tilt sensor always indicates almost horizontal. The temporary scaffold for waterside construction according to claim 1, wherein the cylinder is extended and contracted.
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