JPH07292648A - Construction of artificial island - Google Patents
Construction of artificial islandInfo
- Publication number
- JPH07292648A JPH07292648A JP8641894A JP8641894A JPH07292648A JP H07292648 A JPH07292648 A JP H07292648A JP 8641894 A JP8641894 A JP 8641894A JP 8641894 A JP8641894 A JP 8641894A JP H07292648 A JPH07292648 A JP H07292648A
- Authority
- JP
- Japan
- Prior art keywords
- water
- artificial island
- sheet
- embankment
- construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は湖沼部や河川内で、地盤
の非常に悪い個所での人工島の築造方法に係るものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an artificial island in a very poor ground such as a lake or a river.
【０００２】[0002]
【従来の技術】従来、人工島の築造や築堤に際しては、
鋼矢板、鋼管矢板等で自立、また補助としてタイロッド
等を利用して完全に締切り、その内部を埋戻し、盛土し
て築堤、人工島の築造を行うか、あるいはまた土砂を投
入できるだけ投入して軟弱地盤の土の入れ替えが済むま
で土砂の投入を続け、築堤、人工島の築造を行ってい
た。2. Description of the Related Art Conventionally, when constructing or embanking artificial islands,
Self-supporting with steel sheet piles, steel pipe sheet piles, etc., or completely closed by using tie rods etc. as an aid, backfilling the inside, embankment to build embankments, artificial islands, or throw in as much sand as possible. Until the soil on the soft ground was replaced, earth and sand were continuously added to build embankments and artificial islands.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら鋼矢板、
鋼管矢板等で自立する方法では工事費が嵩む。後者の支
持地盤までの土の入れ替えを行う方法はヒービング等に
よって、周辺に対する影響が大きく、また整然とした線
形の仕上げが困難で、工事費が嵩み、工期が長びく他に
水の汚濁が大きい。[Problems to be Solved by the Invention] However, a steel sheet pile,
Construction costs will increase with the method of self-supporting with steel pipe sheet piles. The latter method of exchanging soil up to the supporting ground has a large effect on the surroundings due to heaving and the like, and it is difficult to orderly and linearly finish, construction costs are high, construction period is long, and water pollution is large.
【０００４】本発明は前記従来技術の有する問題点に鑑
みて提案されたもので、その目的とするところは、施工
性に優れ、工期が短縮され、水の汚濁が防止され、周辺
に悪影響を及ぼすことがない人工島の築造方法を提供す
る点にある。The present invention has been proposed in view of the above problems of the prior art, and its object is to provide excellent workability, shorten the construction period, prevent water pollution, and prevent adverse effects on the surrounding area. The point is to provide a method of constructing an artificial island that does not affect it.
【０００５】[0005]
【課題を解決するための手段】前記の目的を達成するた
め、本発明に係る人工島築造方法によれば、水底地盤に
締切り材を打設して人工島築造物の外郭を形成したの
ち、前記締切り材を跨いで盛土高に応じた範囲の水面に
透水性を有するシートを敷設し、同シート上部に水面よ
り上まで砂又は砂質土で埋戻し、盛土をするものであ
る。In order to achieve the above-mentioned object, according to the artificial island construction method of the present invention, after forming the outer shell of the artificial island construction by driving a shutoff material in the water bottom ground, A sheet having water permeability is laid on the water surface in a range corresponding to the height of the embankment across the cutoff member, and the upper portion of the sheet is backfilled with sand or sandy soil above the water surface for embankment.
【０００６】[0006]
【作用】本発明によれば前記したように、水底地盤に鋼
矢板等の締切り材を打設して人工島築造物の外郭を形成
し、盛土高に対応した範囲の水面に透水性を有するシー
トを敷設して、同シート上に水面上まで砂又は砂質土で
埋め戻すことによって、前記シート下面側の水は透水性
を有するシートより排除され、同シートはシート上の埋
戻し土とともに水底面に着座し、さらに同シート上の埋
戻し土上面に盛土することによって地盤が圧密沈下され
る。このときも締切り部内の埋戻し、盛土の水分が前記
シートを透過することによりシートの沈降及び地盤の圧
密を妨げない。According to the present invention, as described above, the outer wall of the artificial island structure is formed by driving a cutoff material such as steel sheet pile on the bottom of the water, and the water surface in the range corresponding to the embankment height has water permeability. By laying a sheet and backfilling it with sand or sandy soil up to the surface of the water, the water on the lower surface side of the sheet is excluded from the sheet having water permeability, and the sheet together with the backfilling soil on the sheet. The ground is consolidated and settled by sitting on the bottom of the water and embankment on the upper surface of the backfill soil on the same sheet. Also at this time, the backfilling in the shut-off portion and the water content of the embankment permeate the sheet, so that sedimentation of the sheet and consolidation of the ground are not hindered.
【０００７】かくして締切り材内によって外周水面と区
画された人工島が築造され、同人工島内の埋戻し、盛土
に際して、前記したように敷設されたシートによって汚
濁水の人工島外方への流出が防止される。In this way, an artificial island is constructed which is partitioned from the outer water surface by the shutoff material, and when the artificial island is backfilled or embanked, the sheet laid as described above causes the polluted water to flow to the outside of the artificial island. To be prevented.
【０００８】[0008]
【実施例】以下、本発明を図示の実施例について説明す
る。図１（イ）（ロ）は人工島Ａの平面図及び鋼矢板打
設ラインＢを示し、点線部ａは人工島の法尻平面位置を
示す。水底地盤１の所定位置に前記打設ラインＢに沿っ
て鋼矢板２等より構成された締切り材を打設する。この
際、締切り材は盛土に応じてその必要長さが決定され
る。The present invention will be described below with reference to the illustrated embodiments. FIGS. 1A and 1B show a plan view of the artificial island A and a steel sheet pile driving line B, and a dotted line portion a shows the slope bottom plane position of the artificial island. A cutoff member made of steel sheet pile 2 or the like is driven along the driving line B at a predetermined position of the water bottom ground 1. At this time, the required length of the cutoff material is determined according to the embankment.
【０００９】次いで鋼矢板２群に跨がって周辺水面に浮
くシート３を敷設する。前記シート３は例えばＰＰＦα
−５０００（商品名：大洋興業株式会社製造，ポリプロ
ピレン製透水係数≒２×１０-2）等の如き、ある程度の
透水性を有するものが使用される。シート３は陸上部に
おいて重合部に設けた複数の接合用孔４に連綴されたロ
ープ５で接合され、且つ補強されている。Next, a sheet 3 is laid across the group of steel sheet piles 2 and floating on the surrounding water surface. The sheet 3 is, for example, PPFα
-5000 (trade name: manufactured by Taiyo Kogyo Co., Ltd., polypropylene water permeability coefficient ≈ 2 × 10 -2 ) and the like having a certain water permeability are used. The sheet 3 is joined and reinforced by a rope 5 that is continuously bound to a plurality of joining holes 4 provided in the overlapping portion in the land portion.
【００１０】なお、シートの接合方法は、本実施例に限
定されるものではなくシート同志が離れなければよく、
例えばところどころをロープ等で結んでもよく、さらに
シート端部にマジックテープあるいはホックのごときも
のを取り付けて接合してもよい。かくして構成されたシ
ート３は盛土高に応じて必要な強度、特に敷設範囲を定
められるものであって、シート端部を台船に連結し、水
面に浮いた状態で設置場所に引き出し、鋼矢板２群を跨
いでその周辺水面に敷設するものである。シート３の引
き出し距離が大きい場合には、曳航されるシート３の周
囲に浮子を取りつける等の方法を用いるのが望ましい。The method of joining the sheets is not limited to this embodiment, and it is sufficient if the sheets are not separated from each other.
For example, some parts may be tied together with a rope or the like, and a velcro or hook may be attached to the end of the sheet to join them. The sheet 3 thus configured has a required strength, particularly a laying range, which is determined according to the height of the embankment. The sheet end is connected to a pontoon and pulled out to the installation site in a state of floating on the water surface. It is laid on the water surface around the two groups. When the pull-out distance of the seat 3 is large, it is desirable to use a method such as attaching a float around the towed seat 3.
【００１１】一方、施工中の沈下量を想定し、水面下の
必要土量を計算する。次いで前記シート３上に上述のよ
うに計算された砂、乃至砂質土による埋戻し盛土６を行
い、前記シート３を水底地盤１面まで沈設するものであ
り、盛土に応じて水底地盤１の沈下が進む。図中３′は
このようにして沈下したシートを示す。図中ｔは盛土
厚、ｔ1 は盛土層の沈下量でＣは計画仕上面を示す。On the other hand, assuming the amount of subsidence during construction, the required amount of soil below the water surface is calculated. Then, backfill embankment 6 with sand or sandy soil calculated as described above is performed on the sheet 3, and the sheet 3 is submerged to the surface of the water bottom ground 1. Subsidence proceeds. In the figure, 3'denotes the sheet submerged in this way. In the figure, t is the embankment thickness, t 1 is the subsidence amount of the embankment layer, and C is the planned finished surface.
【００１２】なお運搬土量の大きいときはポンプ船で排
砂管を介して搬送するか、バージだけで行ってもよく、
更に鋼矢板２は水面より上に出す。When the amount of soil to be transported is large, it may be transported by a pump ship through a sand discharging pipe, or only by a barge.
Further, the steel sheet pile 2 is projected above the water surface.
【００１３】[0013]
【発明の効果】本発明によれば前記したように、水底地
盤に締切り材を打設して人工島の外郭を画成し、前記締
切り材を跨いで盛土高に応じた範囲に透水性を有するシ
ートを敷設し、水面より上まで砂又は砂質土で埋戻し、
盛土することによって人工島を築造するようにしたの
で、前記締切り材によって設計に沿った人工島の築造物
の外郭が画成され、人工島を構成する盛土がシートによ
って保護され、上部盛土を重機で転圧、締め込み施工可
能となり、ヒービング、円弧滑りが防止され、工期が短
縮され、工費が節減できる。更に締切り部内の埋戻し、
盛土に際して、前記シートの透水性により埋戻し、盛土
による圧密が水の抵抗を受けることなく円滑に行われ
る。且つ同シートにより汚濁水の外への流出が防止さ
れ、周辺の水の汚濁を防止できる。As described above, according to the present invention, the outer wall of the artificial island is defined by placing a cutoff material on the submarine ground, and the water permeability is set in the range depending on the embankment height across the cutoff material. Laying a sheet that has, backfill with sand or sandy soil above the water surface,
Since the artificial island is constructed by embankment, the outer wall of the artificial island structure according to the design is defined by the cutoff material, the embankment forming the artificial island is protected by the sheet, and the upper embankment is heavy-duty machine. With this, compaction and tightening can be performed, heaving and arc sliding are prevented, the construction period is shortened, and the construction cost can be reduced. Furthermore, backfilling in the deadline,
Upon embankment, the sheet is backfilled by water permeability, and the compaction by the embankment is smoothly performed without receiving water resistance. In addition, the sheet prevents the polluted water from flowing out and prevents the surrounding water from being polluted.
【図１】（イ）（ロ）は夫々本発明によって築造された
人工島の平面図及び締切り材打設ラインである。1A and 1B are respectively a plan view of an artificial island constructed according to the present invention and a cut-off material placing line.
【図２】シート敷設状態を示す平面図である。FIG. 2 is a plan view showing a seat laying state.
【図３】埋戻し、盛土状況を示す縦断面図である。FIG. 3 is a vertical cross-sectional view showing backfilling and embankment conditions.
【図４】シート接合部の平面図である。FIG. 4 is a plan view of a sheet joining portion.
【図５】図４の矢視イ−イ図である。5 is a view taken along the line EE in FIG.
【図６】接合用ロープによるシートの接合状況を示す平
面図である。FIG. 6 is a plan view showing how the sheets are joined by a joining rope.
【図７】図５の断面図である。7 is a cross-sectional view of FIG.
Ａ 人工島 Ｂ 鋼矢板打設ライン Ｃ 計画仕上面 ａ 法尻平面 １ 水底地盤 ２ 鋼矢板 ３ シート ３′ シート ４ 接合用孔 ５ ロープ ６ 埋戻し盛土 A Artificial Island B Steel Sheet Pile Placing Line C Planned Surface a Hojiri Plane 1 Bottom Floor 2 Steel Sheet Pile 3 Sheet 3'Sheet 4 Joining Hole 5 Rope 6 Backfill Embankment
Claims (1)
造物の外郭を形成したのち、前記締切り材を跨いで盛土
高に応じた範囲の水面に透水性を有するシートを敷設
し、同シート上部に水面より上まで砂又は砂質土で埋戻
し、盛土をすることを特徴とする人工島築造方法。Claims: 1. Forming an outer shell of an artificial island structure by casting a cutoff material on the water bottom ground, and laying a water-permeable sheet on the water surface in a range corresponding to the embankment height across the cutoff material, A method for constructing an artificial island, characterized in that the upper part of the sheet is backfilled with sand or sandy soil to a level above the surface of the water and embankment is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8641894A JPH07292648A (en) | 1994-04-25 | 1994-04-25 | Construction of artificial island |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8641894A JPH07292648A (en) | 1994-04-25 | 1994-04-25 | Construction of artificial island |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07292648A true JPH07292648A (en) | 1995-11-07 |
Family
ID=13886341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8641894A Pending JPH07292648A (en) | 1994-04-25 | 1994-04-25 | Construction of artificial island |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07292648A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233452A (en) * | 2013-04-25 | 2013-08-07 | 中交第三航务工程局有限公司 | Transportation method for pre-assembled main cellular sheet pile 1/4 cylinders of cellular steel sheet piles |
| CN107190761A (en) * | 2017-07-05 | 2017-09-22 | 中交天航环保工程有限公司 | A kind of artificial bamboo raft cofferdam and its process for constructing |
| CN107386239A (en) * | 2017-07-18 | 2017-11-24 | 中铁隧道勘测设计院有限公司 | A kind of bridge-type man-made island |
| CN109024539A (en) * | 2018-07-27 | 2018-12-18 | 武汉冶建筑安装工程有限责任公司 | Rainy band airport cliff of displacement area high roadbed construction method |
| CN117661512A (en) * | 2023-11-09 | 2024-03-08 | 中交二航局第一工程有限公司 | Time-saving and material-saving control method for flexible shore protection hydraulic reclamation port |
-
1994
- 1994-04-25 JP JP8641894A patent/JPH07292648A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233452A (en) * | 2013-04-25 | 2013-08-07 | 中交第三航务工程局有限公司 | Transportation method for pre-assembled main cellular sheet pile 1/4 cylinders of cellular steel sheet piles |
| CN107190761A (en) * | 2017-07-05 | 2017-09-22 | 中交天航环保工程有限公司 | A kind of artificial bamboo raft cofferdam and its process for constructing |
| CN107386239A (en) * | 2017-07-18 | 2017-11-24 | 中铁隧道勘测设计院有限公司 | A kind of bridge-type man-made island |
| CN109024539A (en) * | 2018-07-27 | 2018-12-18 | 武汉冶建筑安装工程有限责任公司 | Rainy band airport cliff of displacement area high roadbed construction method |
| CN117661512A (en) * | 2023-11-09 | 2024-03-08 | 中交二航局第一工程有限公司 | Time-saving and material-saving control method for flexible shore protection hydraulic reclamation port |
| CN117661512B (en) * | 2023-11-09 | 2024-04-26 | 中交二航局第一工程有限公司 | Time-saving and material-saving control method for flexible shore protection hydraulic reclamation port |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH07292648A (en) | Construction of artificial island | |
| JPH11323936A (en) | Banking structure and stabilizing construction method therefor | |
| JPS61155516A (en) | Slope stabilization work and reinforcement therefor | |
| JP2003320335A (en) | Sea surface waste disposal yard and management method therefor | |
| CN214401844U (en) | Gravity type cofferdam | |
| JP2000290936A (en) | Method and caisson for constructing bridge pier footing | |
| JP3288137B2 (en) | Artificial island construction method | |
| JPH0552364B2 (en) | ||
| JP2866225B2 (en) | Ground reinforcement method | |
| JP2002201623A (en) | Double sheet pile bulkhead and method of constructing the bulkhead | |
| CN217537020U (en) | A outer drainage structure for secretly burying box culvert | |
| KR101404471B1 (en) | Embankment constuction by buoyancy and water pressure on the part prevention of injury and in the force functioning bottom, a mat and execution method for filter | |
| JPH07127038A (en) | Water barrier sheet laying method | |
| JP2626427B2 (en) | Construction method of multi-layer bag and embankment for embankment using excavated sludge | |
| JP2004238993A (en) | Impervious structure of revetment, and construction method for revetment | |
| JP2655322B2 (en) | Construction method of revetment structure | |
| JPH05280058A (en) | Caisson structure | |
| JP3030571B2 (en) | Outer shell of offshore structure and construction method of offshore structure | |
| JPH07310861A (en) | Laying method for underground buried pipe | |
| JPH0913344A (en) | Deformation preventive method of double closing dike | |
| JPH08113935A (en) | Artificial island | |
| CN115217066A (en) | Seepage-proofing reinforced island wall structure and construction method thereof | |
| JP2745097B2 (en) | Construction method of low temperature liquefied gas underground tank | |
| JPS6237171B2 (en) | ||
| JPS5937370B2 (en) | Sand embankment method |