JP2847145B2 - Water casting structure and construction method thereof - Google Patents
Water casting structure and construction method thereofInfo
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- JP2847145B2 JP2847145B2 JP11545690A JP11545690A JP2847145B2 JP 2847145 B2 JP2847145 B2 JP 2847145B2 JP 11545690 A JP11545690 A JP 11545690A JP 11545690 A JP11545690 A JP 11545690A JP 2847145 B2 JP2847145 B2 JP 2847145B2
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- water
- casting structure
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、海洋・河川土木、養魚、海洋汚染防止等の
分野で有用な水上から浮遊状態で打設される水上打設構
造物及びその構築方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a water casting structure which is useful in the fields of marine and river civil engineering, fish farming, marine pollution prevention, etc. Concerning the construction method.
［従来の技術及び発明が解決しようとする課題］ 従来、水上に浮遊構造体を設置しようとした場合、地
上でその軽量構造体を築造した後、それを水上に移送す
ることによって行っていた。[Problems to be Solved by the Related Art and the Invention] Conventionally, when an attempt is made to install a floating structure on water, it has been performed by constructing the lightweight structure on the ground and then transferring it to the water.
浮遊構造体には水上構造物又は水中構造物があり、水
上構造物としては、石油プラットフォームやケーソンの
ような浮遊構造物と、人工島や海底トンネルのような固
定構造物があるが、こうした構造物を構築する方法とし
ては、現地に大掛かりな仮設構造物を構築したのち、
構造物を造る方法と、陸上にて構造物を構築したの
ち、台船等に載せて現場まで曳航し、設置する方法、の
２種があった。Floating structures include floating structures and underwater structures.Floating structures include floating structures such as oil platforms and caissons, and fixed structures such as artificial islands and submarine tunnels. As a method of constructing a structure, after constructing a large temporary structure on the site,
There are two methods: a method of constructing a structure, and a method of constructing the structure on land, placing it on a barge or the like, towing it to the site, and installing it.
ところが、の方法では仮設構造物の構築例えば足場
の確保や、外殻壁の構築などに多大な労力を要するほ
か、材料を現地まで輸送することも大変であった。また
の方法では構造物の設置に際して巨大な揚重機械を必
要とするほか、現場までの曳航にも多大な労力が必要で
あった。However, this method requires a great deal of labor for constructing a temporary structure, for example, securing a scaffold, constructing an outer shell wall, and it is also difficult to transport materials to the site. In addition, the method requires a huge lifting machine when installing the structure, and requires a great deal of labor to tow to the site.
このように従来技術には、現場が水上であると言う特
殊事情のため、陸上とは異なった困難性があった。As described above, the prior art has a difficulty different from that on land because of the special circumstances that the site is on the water.
また従来、水面上の簡易仕切り壁の構築にオイルフェ
ンスなどが使用されているが、現場で製作することは容
易でなかった。例えば、石油採掘用プラットフォームや
タンカーからのオイルの流出に際して、短時間で容易に
防護体を築造することができなく、被害が増大する場合
があった。Conventionally, an oil fence or the like has been used to construct a simple partition wall on the water surface, but it has not been easy to manufacture it on site. For example, when oil spills from an oil mining platform or a tanker, a protective body cannot be easily constructed in a short time, and damage may be increased.
［課題を解決するための手段］ 本発明者は上記問題を解決すべく鋭意研究の結果、従
来技術の問題を解決する新規な本発明方法を開発した。
本願発明は、水上打設構造物及びその構築方法に係るも
のである。[Means for Solving the Problems] As a result of intensive studies to solve the above problems, the present inventors have developed a novel method of the present invention that solves the problems of the prior art.
The present invention relates to a water casting structure and a method of constructing the same.
すなわち、構造物の発明は、ゲルタイムが数秒ないし
数十秒である瞬結性軽量材料を、水面上に撒き出して打
設・形成されてなることを特徴とする水上打設構造物で
ある。That is, the invention of the structure is a water casting structure characterized by being sprinkled and formed by sprinkling a quick-setting lightweight material having a gel time of several seconds to several tens of seconds on the water surface.
該構造物の発明においては、水上打設構造物が、底面
及び／又は側面に不透水性ないし半透水性のシート又は
袋を貼着してなるものであってもよく、また水上打設構
造物が、底部に又は内部に多数の浮遊性の塊状体、粒状
体、中空体、繊維体等の浮遊材料を配してなるものであ
ってもよく、そして水上打設構造物が、ワイヤー、ロー
プ、網、軽量筋材、繊維等の補強材を配設してなるもの
であってもよい。さらにそれら水上打設構造物は、水面
又は水中に浮揚されていてもよく、また、その底面が水
底地盤に定着されてなるものであってもよい。In the invention of this structure, the water casting structure may be a structure in which an impermeable or semi-permeable sheet or bag is adhered to the bottom surface and / or the side surface. The object may be one in which a large number of floating masses, granules, hollow bodies, fibrous bodies, or other floating materials are arranged on the bottom or inside, and the water casting structure may be a wire, It may be one in which a reinforcing material such as a rope, a net, a lightweight reinforcing material, or a fiber is provided. Further, the above water casting structure may be levitated on the water surface or in the water, and may have a bottom surface fixed to the underwater ground.
次に構築方法の発明は、ゲルタイムが数秒ないし数十
秒である瞬結性軽量材料を、水面に撒き出して打設する
ことを特徴とする水上打設構造物の構築方法である。Next, an invention of a construction method is a construction method of a water casting structure characterized by sprinkling a light-curing light-weight material having a gel time of several seconds to several tens of seconds on the water surface.
該方法においては、構築される構造物は、通常、水面
又は水中に浮揚されてなるものであるが、継続的な打設
による積層高の増大によってその底面が水底地盤に到達
・定着されてなるものであってもよい。In this method, the structure to be constructed is usually levitated on the surface of the water or in the water, but the bottom surface thereof reaches and is fixed on the underwater ground due to an increase in the stacking height due to continuous casting. It may be something.
また、本発明の水上打設構造物の構築方法は、水面上
の所要区域にオイルフェンスなどの連続状の浮遊体を敷
設して区切った後、該浮遊体によって区切られた水面上
に、前記瞬結性軽量材料を、撒き出して打設する方法で
ある。さらに、水面上の所要区域の仕切り手段は、シー
トパイルや鋼管矢板などの仕切壁で区切ってもよい。Further, the method for constructing a water casting structure according to the present invention, after laying and separating a continuous floating body such as an oil fence in a required area on the water surface, on the water surface partitioned by the floating body, This is a method in which a quick-setting light-weight material is scattered and poured. Furthermore, the partitioning means for the required area on the water surface may be partitioned by a partition wall such as a sheet pile or a steel pipe sheet pile.
シートパイルや鋼管矢板で仕切った場合、その水面付
近の仕切壁の内側面に可動性型枠を付設し、打設瞬結性
軽量材料が硬化した後、可動性型枠を動かすことによっ
て、仕切壁と硬化瞬結性軽量材料との間にクリアランス
を生じさせ、両者間に発生する付着を防止することも好
ましい。When a sheet pile or steel pipe sheet pile is used to partition, a movable formwork is attached to the inner surface of the partition wall near the water surface, and the movable formwork is moved after the casting quick-setting lightweight material has hardened. It is also preferred that a clearance be created between the wall and the hardened, light-setting material to prevent adhesion between them.
さらにまた、本発明の方法は、水面上の所要区域に、
不透水性ないし半透水性のシート又は袋を張り、その上
部より前記瞬結性軽量材料を撒き出して打設するように
してもよい。Still further, the method of the present invention provides
An impermeable or semi-permeable sheet or bag may be stretched, and the instantaneous light-weight material may be scattered and poured from above.
そしてまた、水面上の所要区域を浮遊体やシートパイ
ル等の仕切壁で区切った後、その区域内に多数の浮遊性
の塊状体、粒状体、中空体、繊維体等の浮遊材料を浮遊
させ、次いで、その上部から前記瞬結性軽量材料を撒き
出して打設してもよい。Also, after a required area on the water surface is divided by a partition wall such as a floating body or a sheet pile, a large number of floating masses, granules, hollow bodies, and fibrous bodies are floated in the area. Then, the flashing light-weight material may be sprinkled out from the upper portion and cast.
上記いずれの方法の場合にあっても、水上打設構造物
を構築するに際して、前記浮遊材料やワイヤー、ロー
プ、網、軽量筋材、プラスチック繊維、金属繊維等の補
強材を配設し、瞬結性軽量材料を撒き出して打設するこ
ともできる。In any of the above methods, when constructing a submerged structure, the above-mentioned floating material and reinforcing materials such as wires, ropes, nets, lightweight bars, plastic fibers, and metal fibers are provided, and It is also possible to sprinkle a light-weight material to be cast.
なお、通常、上記浮遊構造物にはアンカーを垂下して
その流失を防止する。Usually, an anchor is hung on the floating structure to prevent the floating structure from flowing off.
上記本発明における瞬結性軽量材料としては、例えば
セメントのような無機水硬性硬化剤、水、起泡剤及び
急結剤の混合物からなり、気泡が均一分散されて含有さ
れている軽量材料組成物やウレタンプレポリマーであ
るイソシアネートあるいはポリイソシアネートのような
有機水硬性硬化剤と水との混合物やアクリルアミド水
溶液と起泡剤と触媒との混合物等が挙げられる。As the quick-setting light-weight material in the present invention, for example, a light-weight material composition comprising a mixture of an inorganic hydraulic hardener such as cement, water, a foaming agent, and a quick-setting agent, and in which bubbles are uniformly dispersed and contained. And a mixture of an organic hydraulic hardener such as isocyanate or polyisocyanate, which is a urethane prepolymer, and water, and a mixture of an aqueous acrylamide solution, a foaming agent, and a catalyst.
そして、上記瞬結性軽量材料のゲルタイム（固結する
のに必要な時間）は数秒ないし数十秒であるため、材料
の構成成分の最終混合は、打設箇所付近で行うことが好
ましい。Since the gel time (time required for consolidation) of the instantaneous setting light-weight material is several seconds to several tens of seconds, the final mixing of the constituent components of the material is preferably performed in the vicinity of the casting location.
特に、急結剤、触媒等の混合は打設箇所直前部で行う
ことが好ましい。これにより、材料スラリー等のホース
による送給を容易とし、かつ水上への瞬結打設を確実化
できる。これらの混合は、各組成成分毎の各送給ホース
の先端を、打設箇所近くで交叉させるように配置して放
出することによって行うか、あるいは二重管からなる送
給ホースで各組成成分を圧送し、その先端から各成分を
混合放出するようにすることもできる。In particular, it is preferable that the mixing of the quick-setting agent, the catalyst, and the like be performed immediately before the casting location. This facilitates the supply of the material slurry or the like by the hose, and ensures the instantaneous connection and installation on the water. The mixing is carried out by arranging and discharging the tips of the feed hoses for each component so that they cross each other near the casting point, or by using a feed hose consisting of a double pipe. , And each component can be mixed and released from its tip.
なお、該組成物にはその他各種充填材を加配してもよ
いことは言うまでもない。Needless to say, various other fillers may be added to the composition.
［実施例］ 次に本発明を実施例によって詳細に説明する。[Examples] Next, the present invention will be described in detail with reference to examples.
本発明の水上打設用軽量材料による浮揚構造物の築造
方法についての概要を説明すると、まず、起泡剤と水の
混合物を撹拌して十分に起泡させ、これにセメントスラ
リーを均一に混合してして発泡ペーストとする。これ
に、急結剤としての水ガラス水溶液を混合して、水面上
に撒き出して打設する。該混合物は数秒ないし数十秒間
で固結する。The outline of the method of constructing a floating structure using the light-weight material for water casting according to the present invention will be described.First, a mixture of a foaming agent and water is stirred to sufficiently foam, and a cement slurry is uniformly mixed with the mixture. To form a foamed paste. To this, a water glass aqueous solution as a quick setting agent is mixed, and is scattered and poured onto the water surface. The mixture sets in seconds to tens of seconds.
このゲルタイムは、発泡ベーストと水ガラスとの混合
比によって調整することができる。This gel time can be adjusted by the mixing ratio between the foam base and the water glass.
使用される起泡剤としては、膠質ブチルスルフォン酸
ナフタレン、ゼラチン、カゼイン等の蛋白質の誘導体、
サポニン、樹脂石鹸、硫酸ラウリルソーダ等が挙げられ
る。Examples of the foaming agents used include naphthalene colloid butyl sulfonate, gelatin, and derivatives of proteins such as casein;
Saponin, resin soap, lauryl sulfate soda and the like.
また、急結剤としては、水ガラス、重クロム酸カリ、
ケイフッ化ソーダ、アルミン酸ソーダ、塩化アルミニウ
ム、塩化カルシウム等が挙げられるが、特に水ガラスが
好ましい。In addition, as a quick setting agent, water glass, potassium dichromate,
Examples thereof include sodium fluorosilicate, sodium aluminate, aluminum chloride, and calcium chloride, with water glass being particularly preferred.
なお、通常水ガラスとしては、JIS3号品（SiO2含量28
〜30％）が用いられる。In addition, JIS No. 3 product (SiO 2 content 28
~ 30%) is used.
急結剤としての水ガラスの使用は、瞬結性、強度発現
性、安全性等の点から特に好適である。The use of water glass as a quick setting agent is particularly suitable from the viewpoints of quick setting, strength development, safety and the like.
また硬化剤としてセメントを用いているが、これは瞬
結性及び長期強度を確保する等のため、特に好ましいも
のである。In addition, cement is used as a hardening agent, which is particularly preferable because it secures quick setting and long-term strength.
第１図（Ａ）に図示するごとく、以上の発泡ペースト
及び水ガラス水溶液の調整を作業船１上で行い、両材料
を別々に２本のホース又は二重管によって送給ホース２
の先端まで圧送し、そこで両者を混合して水面上に撒き
出すことによって、水上に浮揚構造物３を打設・築造す
る。As shown in FIG. 1 (A), the above-mentioned adjustment of the foaming paste and the aqueous solution of water glass is performed on the work boat 1, and the two materials are separately fed by two hoses or a double hose.
, And the two are mixed and scattered on the surface of the water to cast and build the floating structure 3 on the water.
該作業を続行することにより、第１図（Ｂ）に示すご
とく大容積の浮揚構造物３を構築する。By continuing the work, a large-volume floating structure 3 is constructed as shown in FIG. 1 (B).
次に本発明に係る瞬結性軽量材料の好適組成例につい
て説明する。瞬結性軽量材料においては、特に下記のご
とき、発泡ペーストの組成及び水ガラスの組成が好まし
い。Next, a description will be given of a preferred composition example of the quick-setting lightweight material according to the present invention. In the quick-setting light-weight material, the composition of the foaming paste and the composition of water glass are particularly preferable as described below.
［a:発泡ペーストの組成］ セメント:100重量部、 水 :30〜200重量部 起泡剤 :0.1〜５重量部 気泡安定剤:0.1〜５重量部 気泡量:250〜900l/m3 ［b:水ガラス水溶液の組成］ 水ガラス（JIS3号） :100重量部 水 :30〜200重量部 ゲルタイム調製剤（塩類） :0.1〜10重量部 ｛ａ液とｂ液の混合比（重量比）｝ a:b＝1:0.1〜1:3.5 次に、上記組成範囲の中から下記組成の瞬結性軽量材
料を調製し、水上へ打設した例を具体的に説明する。[A: Composition of foaming paste] Cement: 100 parts by weight, water: 30 to 200 parts by weight Foaming agent: 0.1 to 5 parts by weight Cell stabilizer: 0.1 to 5 parts by weight Cellular amount: 250 to 900 l / m 3 [b : Composition of aqueous solution of water glass] Water glass (JIS No. 3): 100 parts by weight Water: 30 to 200 parts by weight Gel time preparation (salts): 0.1 to 10 parts by weight {mixing ratio of liquid a and liquid b (weight ratio)} a: b = 1: 0.1 to 1: 3.5 Next, an example in which a quick-setting light-weight material having the following composition is prepared from the above composition range and cast on water will be specifically described.
［発泡ペーストの組成］ セメント:100重量部、 水 :100重量部 起泡剤 :0.7重量部 気泡安定剤:0.1重量部 気泡量:650l/m3 である発泡ペーストと、 ［水ガラス水溶液の組成］ 水ガラス（JIS3号） :100重量部 水 :50重量部 ゲルタイム調製剤（塩類） :0.1重量部 である水ガラス水溶液とを、 ：＝1:0.16の割合（重量比）で混合し、該瞬結性軽
量材料を、前記第１図説明方法と同様にして水上に打設
した。[Composition of foam Paste cement: 100 parts by weight, water: 100 parts by weight Foaming agent: 0.7 parts by weight foam stabilizer: 0.1 parts by weight amount of bubbles: and 650L / m 3 at a foam paste Composition of waterglass solution Water glass (JIS No. 3): 100 parts by weight Water: 50 parts by weight Gel time adjuster (salts): 0.1 part by weight of an aqueous solution of water glass is mixed at a ratio of 1: 0.16 (weight ratio). A quick-setting lightweight material was cast on water in the same manner as in the method described with reference to FIG.
その結果、混合物のゲルタイムは５秒であり、硬化物
の密度は0.6ton/m3であり、打設後60秒の硬化浮揚構造
物の圧縮強度は0.1kgf/cm2、打設後２時間後の圧縮強度
は3kgf/cm2であった。そしてこの浮揚構造物は長期間に
わたって、浮遊状態を持続することが確認されている。As a result, the gel time of the mixture was 5 seconds, the density of the cured product was 0.6 ton / m 3 , the compressive strength of the cured floating structure 60 seconds after casting was 0.1 kgf / cm 2 , and 2 hours after casting. The subsequent compressive strength was 3 kgf / cm 2 . It has been confirmed that this floating structure maintains a floating state for a long period of time.
次に本実施例で使用される各配合成分について説明す
る。Next, each compounding component used in the present example will be described.
急結剤としての水ガラス 水ガラスは、通常市販の３号水ガラス（Na2O・3SiO2
・aq）が使用されるが、該水ガラス原液（SiO2:28〜30
％、Na2O:9〜10％、残：水）の粘度は高く、そのままで
は移動速度が遅い。このため、水を事前に添加して水ガ
ラス液の粘度を下げ、移動速度を速くすることが望まし
い。これは通常の水ガラス系薬液注入での水ガラスの使
用方法と同様であり、よく知られている事柄である。な
お、多量の発泡ペーストに少量の水ガラス原液（急結
剤）を混合することは均一混合の意味からも非常に混合
である。Water glass as a quick setting agent Water glass is usually commercially available No. 3 water glass (Na 2 O · 3SiO 2
Aq) is used, but the water glass stock solution (SiO 2 : 28-30)
%, Na 2 O: 9~10% , remainder: water viscosity) is high, is as it is slow movement speed. Therefore, it is desirable to add water in advance to lower the viscosity of the water glass liquid and increase the moving speed. This is the same as the method of using water glass in the usual water glass-based chemical injection, and is a well-known matter. It should be noted that mixing a small amount of an undiluted water glass solution (quick binder) with a large amount of a foaming paste is very mixing from the viewpoint of uniform mixing.
起泡剤 起泡剤について説明すると、本発明においても通常の
セメント系混合物に使用される膠質ブチルスルフォン酸
ナフタレンや蛋白質などの起泡剤が用いられる。一般的
な界面活性剤であればセメント重量の５％程度が上限で
ある。好ましくは、３％以下である。Foaming agent When the foaming agent is explained, also in the present invention, a foaming agent such as naphthalene colloid butylsulfonate or protein used in a usual cement-based mixture is used. For a general surfactant, the upper limit is about 5% of the cement weight. Preferably, it is 3% or less.
密度を1.0ton/m3以下とするためには160l/m3の気泡が
必要となる。この気泡を得るには起泡剤の添加率は0.05
％程度以上必要となるが、気泡の安定性などの点から、
好ましくは0.2％以上である。In order to reduce the density to 1.0 ton / m 3 or less, 160 l / m 3 bubbles are required. To obtain these bubbles, the rate of addition of the foaming agent is 0.05
% Or more, but in terms of air bubble stability,
Preferably it is 0.2% or more.
水量 発泡ペースト中の水量は、200％以下（特に好ましく
は100％以下）が、強度発現上から好ましい。なお、強
度発現は起泡剤の添加量によって大きく影響を受けるた
め、最適水量も変化する。Amount of water The amount of water in the foaming paste is preferably 200% or less (particularly preferably 100% or less) from the viewpoint of strength development. Since the strength development is greatly affected by the amount of the foaming agent added, the optimum amount of water also changes.
セメント量 単位セメント量の増加とともに初期強度が増加する
が、単位セメント量が50kg/m3程度であっても強度発現
が望める。必要となる水上打設構造物の初期強度は用途
によって異なるが、取扱の点から0.5kgf/cm2以上が望ま
しい。Cement amount Although the initial strength increases with an increase in the unit cement amount, the strength can be expected even when the unit cement amount is about 50 kg / m 3 . The required initial strength of the water casting structure varies depending on the application, but is preferably 0.5 kgf / cm 2 or more from the viewpoint of handling.
このため、単位セメント量としては好ましくは150kg/
m3以上が必要となる。For this reason, the unit cement amount is preferably 150 kg /
m 3 or more is required.
セメントと水ガラスの比率 材料を瞬結させるのは急激な凝集反応であり、この反
応が進むには各材料（セメントと水ガラス）の比率が適
正でなければならない。The ratio of cement to water glass It is a rapid agglutination reaction that causes the materials to flash together, and the ratio of each material (cement to water glass) must be appropriate for this reaction to proceed.
水ガラスの量が少なくなると強度が大幅に減少する。
水ガラス（JIS3号品）は少なくともセメントの30％以上
必要である。When the amount of water glass is reduced, the strength is greatly reduced.
Water glass (JIS No. 3) needs at least 30% of cement.
上記のごとく、本発明の水上打設用瞬結性軽量材料は
極めて簡単な組成材料から構成されるものであるが、そ
の製造においても通常の土木用のミキサー、ポンプ等が
使用できる。As described above, the quick-setting light-weight material for water casting according to the present invention is composed of an extremely simple composition material, but a general civil engineering mixer, pump or the like can be used in the production thereof.
そして、水上にそのまま撒きだすことによって、浮揚
体として打設できるため、作業も容易である。Then, since it can be cast as a floating body by being directly scattered on the water, the work is also easy.
さらに改変例として、水中に構造物を構築するに際し
て、まず水面に浮遊する構造物を構築し、続いてその上
に土砂やコンクリート、モルタルを打設して構造物全体
を完成させることもできる。Further, as a modified example, when constructing a structure underwater, it is also possible to construct a structure floating on the water surface first, and then cast earth and sand, concrete, and mortar thereon to complete the entire structure.
［水上打設例］ 次に本発明による水上打設例のいくつかを図面にした
がって説明する。[Examples of water casting] Some examples of water casting according to the present invention will be described with reference to the drawings.
打設例1: 第１図（Ａ）、（Ｂ）に図示するごとく、下記の作業
を作業船１や水上に設置した仮設プラントなどで行い、
瞬結性軽量材料の各成分を送給ホース２にて移送し、打
設箇所近くで混合して水上に撒き出すことにより、浮揚
構造物３を打設・築造する。Casting example 1: As shown in Fig. 1 (A) and (B), the following work is performed on the work boat 1 or a temporary plant installed on the water,
Each component of the instantaneous light-weight material is transferred by the feeding hose 2, mixed near the casting site and scattered on the water to cast and build the floating structure 3.
なお、本打設例で用いた瞬結性軽量材料の配合は、前
記発泡ペーストと水ガラス水溶液との1:0.16（重量
比）混合物である。The composition of the quick-setting light-weight material used in the present casting example is a 1: 0.16 (weight ratio) mixture of the foaming paste and the aqueous glass solution.
該両者混合液はゲルタイムが５秒であるので、水上撒
き出し物は水上に到達すると間もなく、固結し、浮揚構
造物３が水上に打設・築造できた。Since the mixed solution had a gel time of 5 seconds, the material sprayed on the water solidified soon after reaching the surface of the water, and the floating structure 3 could be cast and built on the water.
潮の干満や波浪による揺動等を回避する目的で、該浮
揚構造物３の底部を水底まで沈める必要がある場合に
は、その上部や中央に砂などの材料を築盛すればよい。When it is necessary to sink the bottom of the floating structure 3 to the bottom of the water for the purpose of avoiding the ebb and flow of the tide and the rocking caused by the waves, a material such as sand may be laid on the upper portion or the center.
打設例2: 第２図図示のごとく、打設に先立ってまず長い中空フ
ロート４を水面４に浮遊配設して打設領域を区分けす
る。Casting Example 2: As shown in FIG. 2, prior to casting, a long hollow float 4 is first floated on the water surface 4 to divide the casting area.
次いで、作業船１上で瞬結性軽量材料の調製を行い、
その領域内に瞬結性軽量材料を撒き出して、浮揚構造物
３を打設・構築する。Next, a light-curing light-weight material is prepared on the work boat 1,
A flashing light-weight material is scattered in the area, and the floating structure 3 is cast and constructed.
なお、瞬結性軽量材料の調製及び打設方法は、打設例
１のものと同様である。Note that the method of preparing and placing the quick-set lightweight material is the same as that of the casting example 1.
浮揚構造物３はアンカー５によって固定することが原
則であるが、水面の静寂性が保てる場合などの条件下で
はで使用する必要はない。In principle, the floating structure 3 is fixed by the anchor 5, but it is not necessary to use the floating structure 3 under conditions such as when the water surface can be kept quiet.
打設の継続積層により、第２図（Ｂ）から（Ｃ）のご
とく水底地盤７に達する大容積物になる。With the continuous lamination of the casting, it becomes a large volume reaching the underwater ground 7 as shown in FIGS. 2 (B) to 2 (C).
該浮揚構造物３を沈める場合には、打設例１で説明し
たと同様にすればよい。The sinking of the floating structure 3 may be performed in the same manner as described in the first casting example.
打設例3: まず、第３図（Ａ）図示のごとく、水底地盤７から水
面上へ突出するようにシートパイルや鋼管矢板６を立設
し、打設領域に仕切り構造物を造る。Casting Example 3: First, as shown in FIG. 3 (A), a sheet pile or a steel pipe sheet pile 6 is erected so as to protrude above the water surface from the underwater ground 7, and a partition structure is formed in the casting area.
次いで、作業船１上で瞬結性軽量材料の調製を行い、
その領域内に瞬結性軽量材料を撒き出して、浮揚構造物
３を打設・構築する（第３図（Ｂ））。Next, a light-curing light-weight material is prepared on the work boat 1,
A flashing light-weight material is scattered in the area, and the floating structure 3 is cast and constructed (FIG. 3 (B)).
なお、瞬結性軽量材料の調製及び打設方法は、打設例
１のものと同様である。Note that the method of preparing and placing the quick-set lightweight material is the same as that of the casting example 1.
打設例4: まず、第３図（Ａ）図示のごとく、水底地盤７から水
面上へ突出するようにシートパイルや鋼管矢板６を立設
し、打設領域に仕切り構造物を造る。Casting Example 4: First, as shown in FIG. 3 (A), a sheet pile or a steel pipe sheet pile 6 is erected so as to protrude above the water surface from the underground ground 7, and a partition structure is formed in the casting area.
次いで、第４図（Ａ）図示のごとく、仕切り構造物の
シートパイルや鋼管矢板６の上部内周面にゴム袋等で造
った可動性型枠８を付ける。なお、該可動性型枠は圧縮
空気又は液体の導入口と排出口を有しており、圧縮空気
又は液体の導入、排出によりその容積を増減して、型枠
を動かすものである。Next, as shown in FIG. 4 (A), a movable formwork 8 made of a rubber bag or the like is attached to the sheet pile of the partition structure or the upper inner peripheral surface of the steel pipe sheet pile 6. The movable mold has an inlet and an outlet for compressed air or liquid, and the volume is increased or decreased by introducing or discharging compressed air or liquid to move the mold.
そこで、作業船１上で瞬結性軽量材料の調製を行い、
その打設領域内に可動性型枠８を膨出した状態で瞬結性
軽量材料を撒き出して、浮揚構造物３を打設・構築する
（第４図（Ｂ））。Therefore, on the work boat 1, a quick-setting light-weight material was prepared,
In the state where the movable form 8 is swelled in the casting area, an instantaneous light-weight material is scattered to cast and build the floating structure 3 (FIG. 4 (B)).
所定量の軽量材料（例えば１日の施工分）が打設でき
た段階で可動性型枠８をその仲の圧縮空気を一部排出さ
せて移動させ、第４図（Ｃ）図示のごとく、打設材料と
仕切り構造物との間にクリアランスを発生させる。これ
によって、打設構造物と鋼管矢板等の仕切り構造物とが
付着することを回避する。When a predetermined amount of a lightweight material (for example, one day's work) has been cast, the movable form 8 is moved by partially discharging the compressed air there between, and as shown in FIG. A clearance is generated between the building material and the partition structure. This prevents the driving structure and the partition structure such as the steel pipe sheet pile from adhering.
なお、瞬結性軽量材料の調製及び打設方法は、打設例
１のものと同様である。Note that the method of preparing and placing the quick-set lightweight material is the same as that of the casting example 1.
以上を繰り返して、軽量の構造体を確実に築造する。 By repeating the above, a lightweight structure is reliably built.
打設例5: 第５図（Ａ）〜（Ｆ）に図示するごとく、各種方法で
水上の打設領域全面にシートや袋９を張り、その上から
瞬結性軽量材料を撒き出し打設浮揚構造物を築造する。Casting example 5: As shown in FIGS. 5 (A) to 5 (F), a sheet or bag 9 is spread over the entire casting area on the water by various methods, and a flashing light-weight material is sprinkled over the sheet or bag 9 to cast and float. Build the structure.
（Ａ）図はシートパイルや鋼管矢板６で区分けした領
域内の水面に、周辺部にフロート４で端部を保持させた
シート９を浮かべ、その上から瞬結性軽量材料を撒き出
して、打設する例である。(A) The figure shows a sheet 9 whose edge is held by a float 4 on the water surface in an area divided by a sheet pile or a steel pipe sheet pile 6, and a flashing light-weight material is sprinkled over the sheet 9, This is an example of casting.
この場合は、波があっても静寂性が保てて打設物が一
部飛び離れることがなく、また浮揚構造物の周囲面を防
水状態にするので長期間の水上浮揚をより確実なものと
することができる。In this case, even if there is a wave, silence can be maintained and part of the cast object does not fly away, and the surrounding surface of the floating structure is made waterproof, so that long-term floating on the water is more reliable It can be.
このときにシートや袋の上に水が溜まっていても、施
工上は問題ない。At this time, even if water accumulates on the sheet or bag, there is no problem in construction.
（Ｂ）図は図分けした領域内の水面に、周辺部に浮き
４で端部を保持させたシート９を浮かべ、浮き４をアン
カー５で固定し、シート９の上から瞬結性軽量材料を撒
き出して、打設する例である。(B) The drawing shows a sheet 9 having an edge held by a float 4 on the water surface in the divided area, and fixing the float 4 with an anchor 5. This is an example of distributing and placing.
シートや袋９はフロート４とアンカー５とによって固
定することが原則であるが、水面の静寂性が保てる場合
などの条件下では使用する必要はない。In principle, the sheet or bag 9 is fixed by the float 4 and the anchor 5, but it is not necessary to use the sheet or bag 9 under conditions such as when the water surface can be kept quiet.
上記水面上の所要区域に、不透水性ないし半透水性の
シート又は袋を張り、その上部より前記瞬結性軽量材料
を撒き出して打設する方法によれば、水面の水と直面し
ないので、荒波の場合であっても瞬結性軽量材料が水中
へ拡散・逸失するようなことが防止できる。According to the method in which an impermeable or semi-permeable sheet or bag is stretched over the required area on the water surface and the instantaneous light-weight material is scattered and poured from the upper part thereof, it does not face water on the water surface. Even in the case of rough waves, it is possible to prevent the instantaneous light-weight material from diffusing or losing into water.
この場合も、（Ａ）の場合と同様の作用効果が発揮さ
れる。Also in this case, the same operation and effect as in the case of (A) are exhibited.
（Ｃ）図は（Ｂ）図のものにロープ製の網体10を張っ
て、シート９を補強した状態の斜視図である。(C) is a perspective view of the state shown in (B) in which a rope net 10 is stretched to reinforce the sheet 9.
（Ｄ）図はシート９を２枚重ねて張設した例を（Ｅ）
図は袋９′をつなげて張設した例を、（Ｆ）図はつなげ
た袋９′の底部をロープ製の網体10で補強した例を、各
々示している。(D) shows an example in which two sheets 9 are stacked and stretched (E).
The figure shows an example in which the bags 9 'are connected and stretched, and the figure (F) shows an example in which the bottom of the connected bags 9' is reinforced with a rope net 10.
なお、以上各例における瞬結性軽量材料の調製及び打
設方法は、打設例１のものと同様である。Note that the method of preparing and casting the light-onset light-weight material in each of the above examples is the same as that of the casting example 1.
打設例6: 第６図（Ａ）図示のごとく、打設に先立ってまず長い
中空フロート４を水面に浮遊配設して打設領域を区分け
し、次いで、区分け領域内水面に軽量浮遊粒状体11、例
えば発泡パーライト、軽石小塊、中空ガラスビーズ等を
撒いて一面に浮遊させる。Casting Example 6: As shown in FIG. 6 (A), prior to casting, first, a long hollow float 4 is floated on the water surface to divide the casting area, and then the lightweight floating granular material is placed on the water surface in the sorting area. 11. For example, scatter foamed perlite, pumice lumps, hollow glass beads, etc., and float them all over.
他方、作業船１上で瞬結性軽量材料の調製を行い、そ
の領域内の浮遊粒状体11上に瞬結性軽量材料を撒き出し
て、（Ｂ）図示のごとく浮遊構造物３を打設・構築す
る。On the other hand, an instantaneous light-weight material is prepared on the work boat 1, and the instantaneous light-weight material is scattered on the floating granular material 11 in that region, and (B) the floating structure 3 is cast as shown in the drawing. ·To construct.
なお、瞬結性軽量材料の調製及び打設方法は、打設例
１のものと同様である。Note that the method of preparing and placing the quick-set lightweight material is the same as that of the casting example 1.
浮揚構造物３はアンカー５によって固定することが原
則であるが、水面の静寂性が保てる場合などの条件下で
き使用する必要はない。It is a principle that the floating structure 3 is fixed by the anchor 5, but it is not necessary to use the floating structure 3 under conditions such as when the water surface can be kept quiet.
打設例7: 第７図（Ａ）、（Ｂ）図示のごとく、打設に先立って
まず長い中空フロート４を水面に浮遊配設して打設領域
を区分けし、次いで、区分け領域内水面にロープ製網体
10を張りながら、瞬結性軽量材料をその上から撒き出
し、これを繰り返すことにより、内部がロープ製網体10
で補強された浮揚構造物３が水上に構築される。Casting Example 7: As shown in FIGS. 7 (A) and 7 (B), prior to casting, first, a long hollow float 4 is floated on the water surface to divide the casting area, and then to the inside of the dividing area water surface. Rope net
While stretching, sprinkle a quick-setting light-weight material from above and repeat this to make the inside of the rope net 10
Floating structure 3 reinforced with is constructed on the water.
なお、瞬結性軽量材料の調製及び打設方法は、打設例
１のものと同様である。浮揚構造物３はアンカー５によ
って固定してある。Note that the method of preparing and placing the quick-set lightweight material is the same as that of the casting example 1. The floating structure 3 is fixed by an anchor 5.
以上の打設例は、浮揚構造物３を施工現地で打設した
ものであるが、海洋等の遠隔箇所に浮揚構造物を設置す
る場合は、予め陸地に近い水域で浮揚構造物３を築造
し、それをを設置地点まで曳航などして運搬した後、ア
ンカー等によって停留設置してもよい。In the above example, the levitating structure 3 is cast at the construction site. However, when the levitating structure is installed at a remote place such as the ocean, the levitating structure 3 is constructed in advance in a water area close to land. It may be transported by towing it to the installation point or the like, and then stopped and installed by an anchor or the like.
こうして構築された浮揚構造物は、耐海水性に優れか
つ軽量で浮揚性であり、機械的強度も確保できるため、
浮揚地盤の築造、例えば石油掘削用人工島の築造、橋脚
基礎構築用人工島の築造、水面上の簡易仕切り壁の築造
などに好適に使用できる。The floating structure constructed in this way has excellent seawater resistance, is lightweight and buoyant, and can secure mechanical strength.
It can be suitably used for construction of a floating ground, for example, construction of an artificial island for oil drilling, construction of an artificial island for pier foundation construction, construction of a simple partition wall on the water surface, and the like.
こうした直接的に打設材料を水面上に撒き出して浮揚
構造物を構築することは、従来例のない新規なものであ
る。The construction of a floating structure by directly spilling the casting material onto the water surface is a novel thing that has never been seen before.
本発明により構築した浮揚構造物はそのまま可動構造
物として使用できるほか、固定構造物構築用の仮設構造
物として広範に使用できるため、それにより従来困難で
あった水上での作業を容易かつ迅速にすすめることが可
能となる。The floating structure constructed according to the present invention can be used as a movable structure as it is, and can be widely used as a temporary structure for constructing a fixed structure, so that work on water, which was conventionally difficult, can be performed easily and quickly. It becomes possible to recommend.
［発明の効果］ 上記のとおり本発明の水上打設構造物は、短時間で構
築でき、また大きな仮設装置を必要としないため、従来
技術に比し建設コストが低減できる。[Effects of the Invention] As described above, the surface casting structure according to the present invention can be constructed in a short time and does not require a large temporary device, so that the construction cost can be reduced as compared with the related art.
また本発明の方法によれば、瞬結性軽量材料は軽量か
つ数秒ないし数十秒で瞬結するため、水上においてその
まま打設して、海洋、湖沼等に浮遊する地盤等の構造物
を容易に構築できる。Further, according to the method of the present invention, since the light-setting light-weight material is light-weight and flashes in a few seconds to several tens of seconds, it can be cast directly on water to easily remove a structure such as the ground floating on the ocean, lake or marsh. Can be built.
本発明により構築した浮揚構造物はそのまま可動構造
物として使用できるほか、固定構造物構築用の仮設構造
物として広範に使用できるため、それにより従来困難で
あった水上での作業を容易かつ迅速にすすめることが可
能となる。The floating structure constructed according to the present invention can be used as a movable structure as it is, and can be widely used as a temporary structure for constructing a fixed structure, so that work on water, which was conventionally difficult, can be performed easily and quickly. It becomes possible to recommend.
さらに、構築材料は、打設時に起泡・膨張させるた
め、現場へ搬入すべき原材料は少量で済み、よって原材
料の搬送が容易かつ低コストなものとなる。Further, since the building material is foamed and expanded at the time of casting, only a small amount of the raw material is required to be carried to the site, so that the transport of the raw material is easy and at low cost.
さらに、本発明の構築方法の実施において必要なミキ
サー、ポンプなどの機器は、通常の土木機械がそのまま
使用でき、特殊な機器を用意する必要がない。Further, as the equipment such as a mixer and a pump necessary for carrying out the construction method of the present invention, an ordinary civil engineering machine can be used as it is, and there is no need to prepare special equipment.
そして本発明に係る水上打設用軽量材料は打設と同時
に水面上に浮揚するため、従来困難であった水上での打
設作業が容易に実施できる。And since the lightweight material for water casting according to the present invention floats on the water surface at the same time as the casting, the casting work on the water, which was conventionally difficult, can be easily performed.
第１図（Ａ）ないし第７図（Ｂ）は、本発明の水上打設
構造物の各種打設例を示す。 1:作業船,2:送給ホース,3:浮揚構造物,4:フロート,5:ア
ンカー,6:鋼管矢板,7:水底地盤,8:可動性型枠,9:シー
ト,9′：袋、10:網体,11:浮遊粒状体1 (A) to 7 (B) show various examples of the water casting structure of the present invention. 1: Work boat, 2: Feeding hose, 3: Floating structure, 4: Float, 5: Anchor, 6: Steel pipe sheet pile, 7: Underwater ground, 8: Mobile formwork, 9: Seat, 9 ': Bag , 10: Net, 11: Floating granular material
Claims (15)
性軽量材料を、水面上に撒き出して打設・形成されてな
ることを特徴とする水上打設構造物。1. A water casting structure, characterized in that a quick-setting light-weight material having a gel time of several seconds to several tens of seconds is scattered onto a water surface to be cast and formed.
不透水性ないし半透水性のシート又は袋を貼着してなる
ものであることを特徴とする請求項１記載の水上打設構
造物。2. The water casting device according to claim 1, wherein the water casting structure is formed by attaching an impermeable or semi-permeable sheet or bag to the bottom and / or side surfaces. Construction structure.
の浮遊性の塊状体、粒状体、中空体、繊維体等の浮遊材
料を配してなるものであることを特徴とする請求項１又
は２記載の水上打設構造物。3. The water casting structure is characterized in that a large number of floating masses, granules, hollow bodies, fibrous bodies, and the like are disposed on the bottom or inside thereof. The water casting structure according to claim 1 or 2.
網、軽量筋材、繊維等の補強材を配設してなるものであ
ることを特徴とする請求項１ないし３のいずれかに記載
の水上打設構造物。4. The submerged structure comprises a wire, a rope,
The water casting structure according to any one of claims 1 to 3, wherein a reinforcing material such as a net, a lightweight reinforcing bar, or a fiber is provided.
れてなることを特徴とする請求項１ないし４のいずれか
に記載の水上打設構造物。5. The submerged casting structure according to claim 1, wherein the submerged casting structure is floated on the surface of the water or underwater.
定着されてなることを特徴とする請求項１ないし４のい
ずれかに記載の水上打設構造物。6. The submerged casting structure according to claim 1, wherein the submerged casting structure has a bottom surface fixed to the underwater ground.
性軽量材料を、水面上に撒き出して打設することを特徴
とする水上打設構造物の構築方法。7. A method for constructing a water casting structure, comprising: sprinkling a flashing light-weight material having a gel time of several seconds to several tens of seconds on the water surface.
れてなるものであることを特徴とする請求項７記載の水
上打設構造物の構築方法。8. The method for constructing a water casting structure according to claim 7, wherein the water casting structure is floated on the water surface or in the water.
定着されてなるものであることを特徴とする請求項７記
載の水上打設構造物の構築方法。9. The method of constructing a submerged casting structure according to claim 7, wherein the submerged casting structure has a bottom surface fixed to the underwater ground.
の連続状の浮遊体を敷設して区切った後、該浮遊体によ
って区切られた水面上に、ゲルタイムが数秒ないし数十
秒である瞬結性軽量材料を、直接撒き出して打設するこ
とを特徴とする請求項８又は９に記載の水上打設構造物
の構築方法。10. A continuous floating body such as an oil fence is laid in a required area on the surface of the water to separate the floating body, and then, on the surface of the water separated by the floating body, a gel time of several seconds to several tens of seconds is applied. The construction method of a water casting structure according to claim 8 or 9, wherein the lightweight material is directly scattered and cast.
矢板などの仕切壁で区切った後、該区切られた水面上か
ら、ゲルタイムが数秒ないし数十秒である瞬結性軽量材
料を、直接撒き出して打設することを特徴とする請求項
８ないし10のいずれかに記載の水上打設構造物の構築方
法。11. After a required area on the water surface is partitioned by a partition wall such as a sheet pile or a steel pipe sheet pile, from the partitioned water surface, a flash-onset lightweight material having a gel time of several seconds to several tens of seconds is directly transferred. The method for constructing a water casting structure according to any one of claims 8 to 10, wherein the method is scattered and poured.
透水性のシート又は袋を張り、その上部より、ゲルタイ
ムが数秒ないし数十秒である瞬結性軽量材料を撒き出し
て打設することを特徴とする請求項10又は11記載の水上
打設構造物の構築方法。12. An impervious or semi-permeable sheet or bag is stretched over a required area on the water surface, and a flashing light-weight material having a gel time of several seconds to tens of seconds is sprinkled from the upper portion thereof and cast. 12. The method for constructing a submerged casting structure according to claim 10, wherein:
ル等の仕切壁で区切った後、その区域内に多数の浮遊性
の塊状体、粒状体、中空体、繊維体等の浮遊材料を浮遊
させ、次いで、その上部からゲルタイムが数秒ないし数
十秒である瞬結性軽量材料を撒き出して打設することを
特徴とする請求項８又は９記載の水上打設構造物の構築
方法。13. A required area on the water surface is divided by a partition wall such as a floating body or a sheet pile, and then a large number of floating masses, granules, hollow bodies, fibrous bodies, etc. are suspended in the area. The method for constructing a water casting structure according to claim 8 or 9, wherein the material is floated, and then a flashing light-weight material having a gel time of several seconds to several tens of seconds is scattered from the upper portion and cast.
数の浮遊性の塊状体、粒状体、中空体、繊維体等の浮遊
材料を配設し、瞬結性軽量材料を撒き出して打設するこ
とを特徴とする請求項７ないし13のいずれかに記載の水
上打設構造物の構築方法。14. When constructing a water casting structure, a large number of floating masses, granules, hollow bodies, fibrous bodies, etc., are arranged, and a flashing lightweight material is sprinkled. The method for constructing a submerged structure according to any one of claims 7 to 13, wherein the submerged structure is installed.
イヤー、ロープ、網、軽量筋材、繊維等の補強材を配設
し、瞬結性軽量材料を撒き出して打設することを特徴と
する請求項７ないし14のいずれかに記載の水上打設構造
物の構築方法。15. When constructing a water casting structure, a reinforcing material such as a wire, a rope, a net, a lightweight reinforcing material, a fiber, or the like is provided, and an instantaneous light-weight material is scattered and cast. The method for constructing a submerged structure according to any one of claims 7 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11545690A JP2847145B2 (en) | 1990-05-01 | 1990-05-01 | Water casting structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11545690A JP2847145B2 (en) | 1990-05-01 | 1990-05-01 | Water casting structure and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0414512A JPH0414512A (en) | 1992-01-20 |
| JP2847145B2 true JP2847145B2 (en) | 1999-01-13 |
Family
ID=14663004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11545690A Expired - Fee Related JP2847145B2 (en) | 1990-05-01 | 1990-05-01 | Water casting structure and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2847145B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05112288A (en) * | 1991-10-21 | 1993-05-07 | Fujita Corp | Building method for floating structure |
-
1990
- 1990-05-01 JP JP11545690A patent/JP2847145B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0414512A (en) | 1992-01-20 |
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