JPS6157721A - Method of constructing underwater foundation of multipile jacket structure - Google Patents
Method of constructing underwater foundation of multipile jacket structureInfo
- Publication number
- JPS6157721A JPS6157721A JP17757884A JP17757884A JPS6157721A JP S6157721 A JPS6157721 A JP S6157721A JP 17757884 A JP17757884 A JP 17757884A JP 17757884 A JP17757884 A JP 17757884A JP S6157721 A JPS6157721 A JP S6157721A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- pile
- jacket structure
- concrete
- column
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/34—Foundations for sinking or earthquake territories
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Foundations (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、比較的水深の大きい水域に橋脚その他の構
造物を建設する場合に採用するマルチパイルジャケット
構造の水中基礎施工法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an underwater foundation construction method for a multi-pile jacket structure, which is employed when constructing bridge piers and other structures in relatively deep waters. .
−1−^1
〔従来技術〕
従来、大きい水深(例えば20〜30fn)の水底地盤
に水中基礎を施工する場合は、多柱式基礎およびケーソ
ン基礎等が採用されている。例えば昭和56年4月、総
合土木研究所発行「基礎工」第6巻第4号第58〜66
頁、第91〜97頁参照。-1-^1 [Prior Art] Conventionally, when constructing an underwater foundation on underwater ground at a large water depth (for example, 20 to 30 fn), a multi-column foundation, a caisson foundation, etc. have been adopted. For example, April 1981, Public Works Research Institute, "Fundamentals", Volume 6, No. 4, No. 58-66.
See pages 91-97.
しかし水底地盤が非常に軟弱でしかもその軟弱地盤の層
が厚いとき(例えば20m〜40m)、前記基礎を採用
すると、多柱式基礎の場合は地震時の水平変位が大きく
、またケーソン基礎の場合はケーソンの沈設作業が困難
であるという問題がある0
〔発明の目的、構成〕
この発明は前述の問題を有利に解決できるマルチパイル
ジャケット構造の水中基礎施工法を提供することを目的
とするものであって、この発明の要旨とするところは、
連結部材1により相互に連結された複数の鋼製柱2内の
周囲に多数の区画室6を設け、その区画室6内に杭ガイ
ド部材を設けて基礎用鋼製ジャケット構造体4を構成し
、そのジャケット構造体4を水底地盤に設置したのち、
各杭ガイド部材に鋼杭5を嵌挿して水底地盤に打込み、
次に前記区画室3内あるいは鋼製柱2の上部内にコンク
リート6を充填して、そのコンクリート乙により鋼杭5
をジャケット構造体4に結合することを特徴とするマル
チパイルジャケット構造の水中基礎施工法にある。However, when the underwater ground is very weak and the layer of the soft ground is thick (e.g. 20m to 40m), if the above foundation is adopted, the horizontal displacement during an earthquake will be large in the case of a multi-column foundation, and in the case of a caisson foundation. There is a problem that the work of sinking a caisson is difficult. [Object of the invention, structure] The object of the invention is to provide an underwater foundation construction method for a multi-pile jacket structure that can advantageously solve the above-mentioned problems. The gist of this invention is,
A large number of compartments 6 are provided around a plurality of steel columns 2 interconnected by connecting members 1, and pile guide members are provided in the compartments 6 to constitute a foundation steel jacket structure 4. , After installing the jacket structure 4 on the underwater ground,
Insert the steel pile 5 into each pile guide member and drive it into the underwater ground,
Next, concrete 6 is filled into the compartment 3 or the upper part of the steel pillar 2, and the concrete 6 is used to form the steel pile 5.
An underwater foundation construction method for a multi-pile jacket structure is provided, which is characterized in that the above is connected to a jacket structure 4.
次にこの発明を図示の例に6につて詳卸1に1悦明する
。Next, this invention will be explained in detail in Section 6 using the illustrated example.
第6図ないし第9図はこの発明の実施例において使用す
る基礎用鋼製ジャケット構造体4を示すものであって、
数本(図示の場合は5本)の断面円形の鋼製柱2が前後
および左右方向に間隔をおいて配置され、隣り合う各鋼
製柱2の中間部および下部は鋼製連結部材1を介して溶
接により連結され、°かつ各鋼製柱2の上端部は鋼製ま
たは鉄骨コンクリート製の頂盤7に連結され、さらに各
鋼製柱2の中央部に配置された鋼製内柱8と鋼製柱2と
は放射状に配置された補強兼区画用鋼製リブプレート9
を介して連結され、前記鋼製柱2、鋼製内柱8および多
数のりブグレート9により構成された多数の区画室ろ内
の上部に、下方に向かつて漸次縮小している截頭円錐形
の下部杭ガイド部材10が配置され、その下部杭ガイド
部材10は ″区画室ろの周壁に対し支持部材1
1および溶接により固定されている。この下部杭ガイド
部材10を第8図に示す位置よりさらに上方の位置例え
ば鋼製柱2の最」二部付近にも設けて、杭ガイド機能を
高めるようにしてもよい。6 to 9 show a basic steel jacket structure 4 used in an embodiment of the present invention,
Several (five in the case of illustration) steel columns 2 with a circular cross section are arranged at intervals in the front-rear and left-right directions, and the middle and lower parts of each adjacent steel column 2 are provided with a steel connecting member 1. The upper end of each steel column 2 is connected to a top plate 7 made of steel or steel frame concrete, and a steel inner column 8 disposed in the center of each steel column 2 is connected to the top plate 7 made of steel or steel concrete. and steel columns 2 are reinforcing and partitioning steel rib plates 9 arranged radially.
A truncated conical shape that gradually decreases downward is installed in the upper part of the multiple compartment chambers formed by the steel column 2, the steel inner column 8, and the multiple grate plates 9. A lower pile guide member 10 is disposed, and the lower pile guide member 10 is attached to the support member 1 against the peripheral wall of the compartment compartment.
1 and fixed by welding. This lower pile guide member 10 may be provided at a position further above the position shown in FIG. 8, for example near the secondmost part of the steel column 2, to enhance the pile guide function.
各区画室乙の下部に、下方に向かって漸次縮小する截頭
円錐形部分とその下端に連続する筒体とからなる下部杭
ガイド部材12が配置され、そのT部杭ガイド部材12
は区画室ろの周壁に対し支持部材13および溶接により
固定され、かつ鋼製柱2および鋼製内柱8の下端部を塞
ぐ鋼製底板14は鋼製柱2および鋼製内柱8の下端部に
対し溶接 1により固着され、さらに鋼製内柱8内
の下部に鉄骨部材15が溶接により固着され、また前記
下部杭ガイド部材120筒体は鋼製底板14を貫通して
下方に突出している。A lower pile guide member 12 consisting of a truncated conical portion that gradually contracts downward and a cylindrical body continuous to its lower end is arranged at the bottom of each compartment B, and the T-section pile guide member 12
is fixed to the peripheral wall of the compartment chamber by a support member 13 and welding, and a steel bottom plate 14 that closes the lower ends of the steel columns 2 and the steel inner columns 8 is the lower end of the steel columns 2 and the steel inner columns 8. A steel frame member 15 is further fixed to the lower part of the steel inner column 8 by welding, and the cylindrical body of the lower pile guide member 120 penetrates the steel bottom plate 14 and protrudes downward. There is.
前記下部杭ガイド部材12の筒体の内側にゴム製止水リ
ング16が固定され、かつ前記区画室ろ内には、上部ガ
イド部材10と下部ガイド部材12との間において鋼製
補強リング17が溶接により固着されている。A rubber water stop ring 16 is fixed to the inside of the cylindrical body of the lower pile guide member 12, and a steel reinforcing ring 17 is fixed inside the compartment between the upper guide member 10 and the lower guide member 12. Fixed by welding.
前述のような構成のジャケット構造物4は、海上輸送に
便利な工場、陸上ヤードあるいはドック等で十分な品質
管理のもとに製作される。なお頂盤7を鋼製とする場合
は当然ながら、頂盤7を鉄骨コンクリート製とする場合
でも、杭打ち等の施工を制約しない限り鉄骨部材を組込
んでジャケット構造体4を製作することができる。The jacket structure 4 having the above-mentioned configuration is manufactured under sufficient quality control in a factory, land yard, dock, etc. convenient for marine transportation. Naturally, if the top plate 7 is made of steel, even if the top plate 7 is made of steel concrete, it is possible to manufacture the jacket structure 4 by incorporating steel members as long as there are no restrictions on construction such as pile driving. can.
前記連結部材1としては、断面円形または断面矩形で全
長にわたって同一断面のものあるいは鋼製柱との接合箇
所を拡大した変断面のものを使用してもよく、!f、た
鋼製柱と連結部(」との接合部に補強用鋼板リブを溶接
により固着してもよい。The connecting member 1 may be circular or rectangular in cross section and have the same cross section over its entire length, or may have a modified cross section in which the joint with the steel column is enlarged. f. A reinforcing steel plate rib may be fixed by welding to the joint between the steel column and the connecting part.
前記鋼製柱2としては例えば直径10n1程朋のものが
数本用いられるので、ジャケット構造物4の重量はかな
り大きくなる(例えば1000〜2000トン)が、鋼
製内柱8および連結部材1の浮力を利用してジャケット
構造物4を浮上曳航したのち、鋼製内柱8に注水して浮
力を調整することにより、ジャケット構造物を比較的容
易に沈設することができる。Since several steel columns 2 with a diameter of, for example, 10n1 are used, the weight of the jacket structure 4 is quite large (for example, 1000 to 2000 tons), but the weight of the steel inner columns 8 and the connecting member 1 is quite large. After the jacket structure 4 is floated and towed using buoyancy, water is poured into the steel inner column 8 to adjust the buoyancy, thereby making it possible to sink the jacket structure relatively easily.
前記止水リング16の一例としてはゴム製中空リングを
使用し、鋼杭5を打設したのち、その中空リング内に空
気を圧入して膨張させることにより、中空リングを鋼杭
5の外周面に圧接させてもよい。As an example of the water stop ring 16, a rubber hollow ring is used, and after driving the steel pile 5, air is injected into the hollow ring and expanded, so that the hollow ring is attached to the outer peripheral surface of the steel pile 5. It may be pressed against the
前記鋼製ジャケット構造体を使用して水中基礎を施工す
る場合は、まず予め水底地盤のジャケット構造体設置予
定位置に、ジャケット構造体を工事期間中支承するため
に、第10図に例示したような杭により支持された受台
22を施工し、ジャケット構造体4をその受台上に沈設
載置したのち、ジャケット構造体の横方向位置およびレ
ベルを調整する。When constructing an underwater foundation using the above-mentioned steel jacket structure, first install the jacket structure on the underwater ground at the planned location to support the jacket structure during the construction period, as shown in Fig. 10. After constructing the pedestal 22 supported by a pile, and placing the jacket structure 4 on the pedestal, the lateral position and level of the jacket structure are adjusted.
次に鋼杭(鋼管杭)5を上部ガイド部材10、下部ガイ
ド部材12および止水リング16に挿通し、ジャケット
構造体4の上部を足場として鋼杭の打設を行なう。この
鋼杭5の処理としては、第11図に示すようにコンクリ
−)6Aで主に鋼製柱2の上部において固定する方法と
、第2図に示すように固定に必要な長さをもって鋼杭5
を切断してコンクリート6で鋼製柱2の下部において固
定する方法がある。ここでは、後者の鋼杭5を適切な位
置で切断する場合の鋼杭5の処理方法を述べる。Next, the steel pile (steel pipe pile) 5 is inserted through the upper guide member 10, the lower guide member 12, and the water stop ring 16, and the steel pile is driven using the upper part of the jacket structure 4 as a foothold. This steel pile 5 can be fixed mainly at the top of the steel column 2 using concrete (6A) as shown in Fig. Pile 5
There is a method of cutting it and fixing it at the bottom of the steel column 2 with concrete 6. Here, a method for processing the steel pile 5 in the latter case where the steel pile 5 is cut at an appropriate position will be described.
まず前記止水リング16を働らかせて止水を行ない、前
記区画室ろ内の水を排出してドライの状態にしたのち、
区画室3内にコンクリート6を打設し、鋼杭5の頭部を
そのコンクリート中に埋込む。このようにして各区画室
3について順次杭打ち、ドライの状態にしてからのコン
クリート打設金行彦ったのち、鋼製内柱8内を排水して
コンクIJ −) 18を打設して、鉄骨コンクリート
構造の底盤全構成する。First, the water stop ring 16 is operated to stop the water, and after draining the water in the compartment and making it dry,
Concrete 6 is placed in the compartment 3, and the head of the steel pile 5 is embedded in the concrete. In this way, after piling each compartment 3 one after another and placing concrete in a dry state, the inside of the steel inner columns 8 was drained and concrete IJ-) 18 was poured, and the steel frame It consists of the entire base of the concrete structure.
なお、鋼杭5と鋼製柱2との固定において更に結合を強
めるためには、−例として第12図に示すように、鋼製
柱2、鋼製内柱8および鋼杭5へのジベル20の固定や
コンクリートの補強のために鉄筋21の数句施工を行な
うとよい。次にジャケット構造体4における頂盤7に橋
脚19の下端部を固定する。In order to further strengthen the bond between the steel pile 5 and the steel column 2, for example, as shown in FIG. It is a good idea to install several reinforcing bars 21 to fix the parts 20 and reinforce the concrete. Next, the lower end of the pier 19 is fixed to the top plate 7 of the jacket structure 4.
この発明によれば、軟弱な水底地盤に設置した鋼製ジャ
ケット構造体4における鋼製柱2内の周囲の多数の区画
室3から鋼杭5を水底地盤に打込むので、地震力に代表
される水平方向の大きな荷重に対して、ジャケット構造
体4が多数の鋼杭5の耐力を有効に集約して抵抗するこ
とになり、そのためジャケット構造体4の水平方向の変
位を小さくすることができ、さらに鋼製柱2内の周囲に
多数の区画室3を設けたので、鋼杭5を切断する場合に
は、コンクリート乙による鋼杭5と鋼製柱2との結合を
杭1本ずつ行うことができ、そのため施工が確実であり
、また水深が大きく厚い軟弱地盤にジャケット構造体4
を設置した場合は、必然的に鋼杭5が長尺になるが、そ
の長尺の鋼杭5を前記各区画室ろに設けられた杭ガイド
部材によりガイドして打設するので、直杭はもとより斜
杭についても容易にかつ精度よく打設することができ、
したがって、大水深でしかも基礎を支える地盤が軟弱で
厚い地層である場合の基礎施工に適している等の効果が
得られる。According to this invention, the steel piles 5 are driven into the underwater ground from a large number of compartments 3 around the steel column 2 in the steel jacket structure 4 installed on the soft underwater ground. The jacket structure 4 effectively concentrates the strength of a large number of steel piles 5 to resist a large horizontal load, and therefore the horizontal displacement of the jacket structure 4 can be reduced. Furthermore, since a large number of compartments 3 are provided around the steel column 2, when cutting the steel pile 5, the steel pile 5 and the steel column 2 are connected one by one using concrete B. Therefore, the construction is reliable, and the jacket structure 4 can be installed on soft ground with large water depth and thick water.
If a steel pile 5 is installed, the steel pile 5 will inevitably be long, but since the long steel pile 5 is guided and driven by the pile guide member provided in each compartment, a straight pile is not required. Not only can inclined piles be driven easily and accurately,
Therefore, effects such as being suitable for foundation construction in deep water and where the ground supporting the foundation is soft and thick strata can be obtained.
第1図はこの発明の方法により施工された水中基礎の側
面図、第2図はその水中基礎におけるジャケット構造体
と鋼杭との結合部を示す縦断側面図である。第3図々い
し第9図はこの発明の実施例において用いられる基礎用
鋼製ジャケット構造体を示すものであって、第6図は側
面図、第4図は平面図、第5図は第6図のA−A線断面
図、第6図は第3図のB−B線断面図、第7図は第6図
のC−C線断面図、第8図は鋼製柱の内部構造を示す縦
断側面図、第9図は第8図のD−D線断面図である。第
10図は水底地盤に設置した受台上にジャケット構造体
を載置した状態を示す側面図、第11図は鋼製柱の上部
で鋼杭を固定する場合の側面図、第12図は鋼杭とジャ
ケット構造体との結合部の他の例を示す縦断側面図であ
る。
図において、1は連結部材、2は鋼製柱、3は区画室、
4は鋼製ジャケット構造体、5は鋼杭、6はコンクリー
ト、7は鋼製または鉄骨コンクリート製頂盤、8は鋼製
内柱、9は鋼製リブプレート、10は上部杭ガイド部材
、12は下部杭ガイド部材、14は鋼製底板、16はゴ
ム製止水リング、18は・コンクリート、20はジベル
、21は鉄筋、22は受台である。FIG. 1 is a side view of an underwater foundation constructed by the method of the present invention, and FIG. 2 is a longitudinal sectional side view showing a joint between a jacket structure and a steel pile in the underwater foundation. Figures 3 to 9 show a basic steel jacket structure used in an embodiment of the present invention, with Figure 6 being a side view, Figure 4 being a plan view, and Figure 5 being a side view. 6 is a cross-sectional view taken along the line A-A in Figure 6, Figure 6 is a cross-sectional view taken along the line B-B in Figure 3, Figure 7 is a cross-sectional view taken along the line C-C in Figure 6, and Figure 8 is the internal structure of the steel column. FIG. 9 is a sectional view taken along line D-D in FIG. 8. Figure 10 is a side view showing the jacket structure placed on a pedestal installed in the underwater ground, Figure 11 is a side view when a steel pile is fixed at the top of a steel column, and Figure 12 is FIG. 7 is a longitudinal side view showing another example of a joint between a steel pile and a jacket structure. In the figure, 1 is a connecting member, 2 is a steel column, 3 is a compartment,
4 is a steel jacket structure, 5 is a steel pile, 6 is concrete, 7 is a steel or steel concrete top plate, 8 is a steel inner column, 9 is a steel rib plate, 10 is an upper pile guide member, 12 14 is a lower pile guide member, 14 is a steel bottom plate, 16 is a rubber water stop ring, 18 is concrete, 20 is a dowel, 21 is a reinforcing bar, and 22 is a pedestal.
Claims (1)
周囲に多数の区画室3を設け、その区画室3内に杭ガイ
ド部材を設けて基礎用鋼製ジャケット構造体4を構成し
、そのジャケット構造体4を水底地盤に設置したのち、
各杭ガイド部材に鋼杭5を嵌挿して水底地盤に打込み、
次に前記区画室3内あるいは鋼製柱2の上部内にコンク
リート6を充填して、そのコンクリート6により鋼杭5
をジャケット構造体4に結合することを特徴とするマル
チパイルジャケット構造の水中基礎施工法。A large number of compartments 3 are provided around a plurality of steel columns 2 interconnected by connecting members 1, and pile guide members are provided in the compartments 3 to constitute a foundation steel jacket structure 4. , After installing the jacket structure 4 on the underwater ground,
Insert the steel pile 5 into each pile guide member and drive it into the underwater ground,
Next, the inside of the compartment 3 or the upper part of the steel pillar 2 is filled with concrete 6, and the concrete 6 is used to 5 the steel pile 5.
An underwater foundation construction method for a multi-pile jacket structure, which is characterized by combining the above with a jacket structure 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17757884A JPS6157721A (en) | 1984-08-28 | 1984-08-28 | Method of constructing underwater foundation of multipile jacket structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17757884A JPS6157721A (en) | 1984-08-28 | 1984-08-28 | Method of constructing underwater foundation of multipile jacket structure |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6157721A true JPS6157721A (en) | 1986-03-24 |
Family
ID=16033417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17757884A Pending JPS6157721A (en) | 1984-08-28 | 1984-08-28 | Method of constructing underwater foundation of multipile jacket structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6157721A (en) |
Cited By (9)
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WO2000001893A1 (en) * | 1998-07-02 | 2000-01-13 | Robert Lawson | Improved constructional support |
AU752228B2 (en) * | 1998-07-02 | 2002-09-12 | Robert Lawson | Improved constructional support |
JP2005194867A (en) * | 2003-12-12 | 2005-07-21 | Jfe Engineering Kk | External pressure resisting structure and its constructing method |
JP2010216150A (en) * | 2009-03-17 | 2010-09-30 | Jfe Steel Corp | Pier foundation structure and pier foundation construction method |
JP2010248734A (en) * | 2009-04-13 | 2010-11-04 | Jfe Steel Corp | Bridge pier foundation structure |
JP2013044085A (en) * | 2011-08-22 | 2013-03-04 | Michihiro Oe | Underwater foundation and installation method for underwater foundation |
KR20140140440A (en) * | 2013-05-29 | 2014-12-09 | 한국해양과학기술원 | Hybrid support structure and method for installing the same |
JP2015021275A (en) * | 2013-07-18 | 2015-02-02 | 株式会社安藤・間 | Modification method of underwater structure |
CN105133632A (en) * | 2015-08-19 | 2015-12-09 | 天津港航工程有限公司 | Offshore wind turbine foundation structure and construction method thereof |
-
1984
- 1984-08-28 JP JP17757884A patent/JPS6157721A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000001893A1 (en) * | 1998-07-02 | 2000-01-13 | Robert Lawson | Improved constructional support |
EP1092066A1 (en) * | 1998-07-02 | 2001-04-18 | Robert Lawson | Improved constructional support |
AU752228B2 (en) * | 1998-07-02 | 2002-09-12 | Robert Lawson | Improved constructional support |
EP1092066A4 (en) * | 1998-07-02 | 2003-05-14 | Robert Lawson | Improved constructional support |
JP2005194867A (en) * | 2003-12-12 | 2005-07-21 | Jfe Engineering Kk | External pressure resisting structure and its constructing method |
JP2010216150A (en) * | 2009-03-17 | 2010-09-30 | Jfe Steel Corp | Pier foundation structure and pier foundation construction method |
JP2010248734A (en) * | 2009-04-13 | 2010-11-04 | Jfe Steel Corp | Bridge pier foundation structure |
JP2013044085A (en) * | 2011-08-22 | 2013-03-04 | Michihiro Oe | Underwater foundation and installation method for underwater foundation |
KR20140140440A (en) * | 2013-05-29 | 2014-12-09 | 한국해양과학기술원 | Hybrid support structure and method for installing the same |
JP2015021275A (en) * | 2013-07-18 | 2015-02-02 | 株式会社安藤・間 | Modification method of underwater structure |
CN105133632A (en) * | 2015-08-19 | 2015-12-09 | 天津港航工程有限公司 | Offshore wind turbine foundation structure and construction method thereof |
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