JPS60119817A - Construction work of structure - Google Patents

Construction work of structure

Info

Publication number
JPS60119817A
JPS60119817A JP22675283A JP22675283A JPS60119817A JP S60119817 A JPS60119817 A JP S60119817A JP 22675283 A JP22675283 A JP 22675283A JP 22675283 A JP22675283 A JP 22675283A JP S60119817 A JPS60119817 A JP S60119817A
Authority
JP
Japan
Prior art keywords
anchor
ground
grout
head
pit
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
Application number
JP22675283A
Other languages
Japanese (ja)
Inventor
Nobuaki Tokunaga
徳永 信明
Jun Kudo
工藤 旬
Masaru Matsuura
勝 松浦
Masao Korematsu
是松 雅雄
Motoyoshi Ishii
元悦 石井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP22675283A priority Critical patent/JPS60119817A/en
Publication of JPS60119817A publication Critical patent/JPS60119817A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • E02D5/80Ground anchors
    • E02D5/808Ground anchors anchored by using exclusively a bonding material

Abstract

PURPOSE:To construct structures having structurally high reliability by a method in which the free long portion of an anchor whose lower part is fixed to the ground is tensely introduced into and fixed to a structure on the ground's surface. CONSTITUTION:An earth anchor A is penetrated into an excavated pit 2 in the seabed ground 1. The upper free long portion 3a3 projected from the ground 1 is introduced into a jacket structure B, and a grout 7 is injected under pressure into the structure B and the pit 2 to fix the lower end 3a1 of the anchor A to the pit 2. The upper free long portion 3a3 of the twist steel wire 3 of the anchor A is tensed by a jack and fixed through a wedge 9 to the hole of the anchor head 8. The tension force of the head of the anchor A is transmitted as a compression force to the ground 1 through the head 8 and a distribution plate from the structure B. Tensile load to be applied to the anchor A is also transmitted to the grout 7 and the ground 1.

Description

【発明の詳細な説明】 従来のアースアンカーには仮設用として用いられる場合
と、永久構造物として用いられる場合とがある。仮設用
アンカーとしては地下のオープンカット等における山留
アンカーが主な例である。
DETAILED DESCRIPTION OF THE INVENTION Conventional earth anchors can be used either temporarily or permanently. The main example of a temporary anchor is a mountain anchor for underground open cuts.

更に牽引用反力アンカー、工事用クレン基礎のアンカー
、各種鋼橋の懸架用アンカー等にも利用されている。
It is also used as reaction force anchors for traction, anchors for construction crane foundations, suspension anchors for various steel bridges, etc.

永久構造物のアンカーの使用例としては引張力が生じる
建物の鉛直方向アンカー、各種鉄塔、吊橋、地上り防止
工等がある。
Examples of the use of anchors for permanent structures include vertical anchors for buildings where tensile forces occur, various steel towers, suspension bridges, and ground protection works.

本発明は前記アースアンカーの特徴を利用して。The present invention utilizes the characteristics of the earth anchor.

海岸の沿岸地域等、大きな水平力が働き、且つ地盤面で
作業できないような個所において構造的に信頼度の高い
構造物な構築する改良された工法を提供することを目的
として提案されたもので、地盤内に下底部を碇着された
アンカー材の自由長部を前記地盤上の構造物内に導入緊
張し、同構造物に碇着することを特徴とする構造物の構
築工法に係るものである。
This was proposed with the aim of providing an improved construction method for constructing structures with high structural reliability in locations such as coastal areas where large horizontal forces act and where it is impossible to work on the ground surface. , a method for constructing a structure, characterized in that a free length part of an anchor material whose lower base is anchored in the ground is introduced into a structure on the ground, tensioned, and anchored to the structure. It is.

本発明においては前記したように、地盤内に下底部を碇
着されたアンカー材の自由長部を、前記地盤上の構造物
内にまで導入し、同自由長部を緊張して前記構造物に碇
着するようにしたので、アンカー材と構造物とが一体化
され、且つ地盤面から成る1ノベルの高さまで、アンカ
ー材の緊張、碇着等の作業の行なえる位置を変えること
ができる。
In the present invention, as described above, the free length part of the anchor material whose lower bottom part is anchored in the ground is introduced into the structure on the ground, and the free length part is tensioned to secure the anchor material to the structure. Since the anchor material and the structure are integrated, the tension of the anchor material and the position where anchoring work can be changed can be changed up to the height of one novel consisting of the ground surface. .

このことは沿岸地域等、常時破波等が発生し、地盤面で
の作業が困難で且つ大きな水平力が作用し、それによる
引抜力が大きな構造物の構築に有利である。
This is advantageous for constructing structures such as coastal areas, where breaking waves occur constantly, making it difficult to work on the ground surface, and where large horizontal forces act, resulting in large pulling forces.

また前記アンカー材を緊張して基盤上の構造物に碇着す
るようにしたので、アンカー材の導入力により構造物と
基盤との間における摩擦抵抗が増大し、構造物が軽−゛
であっても大きな滑動抵抗が得られる。
In addition, since the anchor material is anchored to the structure on the base by tensioning it, the force of introduction of the anchor material increases the frictional resistance between the structure and the base, making the structure lighter. Great sliding resistance can be obtained even when the

また本工法は比較的小規模な建設機械で施工でき、工費
が節減され、工期が縮減される等、本発明は多くの利点
を有するものである。
Furthermore, the present invention has many advantages, such as being able to perform construction using relatively small-scale construction machinery, reducing construction costs and shortening the construction period.

以下本発明を沿岸より沖合に延長されたザイホン管を支
持する構造物であるジャケットストラフチャを、海底岩
盤に設置するのに適用した図示の実施例について説明す
る。
Hereinafter, an illustrated embodiment in which the present invention is applied to installing a jacket strafe, which is a structure supporting a ziphon pipe extended from the coast to offshore, on a seabed bedrock will be described.

海面上より海底地盤(1)にポーリングして構成された
掘削孔(2)にアースアンカー囚を挿入する。
An earth anchor is inserted into a drill hole (2) constructed by poling into the seabed ground (1) from above the sea surface.

アースアンカー(Alは鋼撚線(3)の先端碇着部(3
α1)を除く自由長部(3α2)(3α3)の外周にグ
リース、瀝青物質等が被υされてグラウト中で目出に伸
長できるように構成され、前記碇着部(3a1)及び岩
盤内の下部自由長部(3α2)の外周に亘って保護管(
4)が同心状に包葎され、海水による鋼撚線の侵蝕が防
止されている。更に前記碇着部に3αl)においては予
め地上部において同碇着部(3α1)と保淳管(4)と
の間にグラウト(5)が横裂されている。
Earth anchor (Al is the tip anchoring part (3) of the steel stranded wire (3)
The outer periphery of the free length portions (3α2) (3α3) excluding α1) is coated with grease, bituminous material, etc., so that they can be expanded in the grout, and the anchoring portion (3a1) and the rock A protective tube (
4) is wrapped concentrically to prevent seawater from corroding the stranded steel wire. Further, in the anchoring part (3αl), a grout (5) is previously split horizontally between the anchoring part (3α1) and the maintenance pipe (4) above the ground.

図中(6)は同保護管(4)内に配設されたモルタル(
5)の漏洩防止用蓋片である。
In the figure (6) is the mortar (
5) is the leakage prevention lid piece.

かくl−てアースアンカー(Alを地盤(1)の1屈削
孔(2)に挿入したのち、同岩盤(1)上部に突出する
上部自由長部(3α3)を、岩盤(1)上のジャケット
ストラフチャ(B)内に導入するとともに、同ジャケッ
トストラクチャ(Bl及び前記掘削孔(2)内にグラウ
トポンプによってグラウト(力を圧入して、アースアン
カー(Alの下端碇着部(3αl)を地盤(1)の掘削
孔(2)に碇着する。
After inserting the earth anchor (Al) into the bent hole (2) of the ground (1), the upper free length part (3α3) protruding from the top of the rock (1) is inserted into the ground (1). At the same time, grout is introduced into the jacket structure (B) and into the excavation hole (2) using a grout pump. Anchor in the excavated hole (2) in the ground (1).

次いで前記アースアンカー(Alにおける鋼撚線(3)
の上部自由長部(3α3)を油圧ジヤツキで枢持して緊
張し、アンカーヘラ)’ (8)のPC鋼撚線挿貫孔に
楔(9)を介して楔止し、アースアンカーtA)の頭部
の緊張力をアンカーヘラ)’ (8)及び支圧板(10
)を介して圧縮力としてジャケットストラフチャ(El
から岩盤(1)に伝達せしめる。一方、アースアンカー
囚に作用する引張り荷重は、周囲のグラウト(力及び地
盤(1)に伝達される。図中圓はロードセル、αりは保
護管、([3)はジャケットストラフチャ(Blのベー
スである。
Then the earth anchor (steel strands in Al (3)
The upper free length part (3α3) of is pivoted and tensioned with a hydraulic jack, and the anchor spatula)' (8) is wedged into the PC steel stranded wire insertion hole through the wedge (9), and the earth anchor tA) is The tension force on the head of the anchor spatula)' (8) and the bearing plate (10
) as a compressive force through the jacket struture (El
It is transmitted from to the bedrock (1). On the other hand, the tensile load acting on the earth anchor is transmitted to the surrounding grout (force) and the ground (1). It is the base of

従って上記の力はジャケットストラフチャ(B)のベー
ス側面と地盤(1)面とで釣合っている。このため地盤
(1)は岩盤等の剛性の高いものが望ましい。
Therefore, the above force is balanced between the side surface of the base of the jacket strafe (B) and the surface of the ground (1). For this reason, it is desirable that the ground (1) be highly rigid, such as rock.

ジャケットストラフチャ(B)の設計荷重として、アー
スアンカーの必要初期導入力をPt、ジャケットストラ
フチャ(B)に作用する最大圧縮力をR、アースアンカ
ーのPC鋼撚線に作用する最大張力なPt2とすれば、 pt=α・Wt R=Pt+α・Wr Pi2=Pt+β・Wt となる。
As the design load of the jacket struf- ture (B), the required initial introduction force of the earth anchor is Pt, the maximum compressive force acting on the jacket struf- ture (B) is R, and the maximum tension acting on the PC steel strand of the earth anchor. If Pt2 is set as follows, pt=α·Wt R=Pt+α·Wr Pi2=Pt+β·Wt.

ここでWt:引抜側最大外力 Wr:押込側最大外力 α= K1 /Kl + K2 β= K2/Kl +に2 に1;ジャケットストラフチャのばね常数に2:PC鋼
撚線のばね常数 第2図ハPt2.R9R1と外力Wとの関係を示し、同
図から判るようにジャケットストラフチャ(B)はアー
スアンカー(Atの初期張力P4に外力を加えた荷重(
Pi+αwr )に耐えうるように設計すれば、その他
は通常のアースアンカーと同じ手順で設計条件が確立で
きる。
Here, Wt: Maximum external force on the pulling side Wr: Maximum external force on the pushing side α = K1 / Kl + K2 β = K2 / Kl Figure 2 Pt2. The relationship between R9R1 and the external force W is shown, and as can be seen from the figure, the jacket strafe (B) has a load (the initial tension P4 of the earth anchor (At) plus the external force).
If it is designed to withstand Pi+αwr), other design conditions can be established using the same procedure as for ordinary earth anchors.

図示の実施例においてはアースアンカー鎮)のPC鋼撚
線(3)における上部自由長部(3α3)をジャケット
ストラフチャ(B)内に導入して緊張、碇着したことに
よって、アースアンカー(A)とジャケットストラフチ
ャ((財)とが一体となり、地盤(1)面から成るレベ
ルの高さまでPC銅撚線緊張等の作業を行な乏−る位置
を変えることができる。このため沿岸地域等、地盤面で
の作業が困難で、且つ非常に大きな水平力が作用し、そ
れによる引抜力が大きな構造の構祭に有利となる。また
アースアンカー囚の導入力によって、ジャケットストラ
フチャ(Blと地盤(1)との間の摩擦抵抗が増大し、
構造物が軽量であるのにもかかわらず、大きな滑動抵抗
が得られる。
In the illustrated embodiment, the upper free length (3α3) of the PC steel stranded wire (3) of the earth anchor (earth anchor) is introduced into the jacket struf- ture (B), tensioned, and anchored. A) and the jacket strafe (foundation) are integrated, and it is possible to change the position where work such as tensioning the PC copper stranded wire is done up to the level of the ground (1). This is advantageous for structures with structures where it is difficult to work on the ground, such as in coastal areas, where very large horizontal forces act, and the resulting pull-out force is large.In addition, the introduction force of the earth anchor allows the jacket straft to be The frictional resistance between Bl and the ground (1) increases,
Although the structure is lightweight, it provides high sliding resistance.

更に海底地盤のポーリング、アースアンカー挿入、グラ
ウト注入、PC鋼撚線の緊張という工程で、すべて海面
上で施工されるが、建設機絨が比較的小規模であって、
経済性に優れ、工期が短縮されるものである。
Furthermore, the process of poling the seabed, inserting the earth anchor, injecting grout, and tensioning the PC steel strands is all carried out on the sea surface, but the construction equipment used is relatively small.
It is highly economical and shortens the construction period.

以上本発明を実ji+i f!11について説明したが
、本発明は勿論このような実施例にだけ局限されるもの
ではなく、不発明の411神を逸脱しない範囲内で種々
の設δ1の改変を施しうるものである。
The present invention has been put into practice! 11 has been described, but the present invention is of course not limited to such an embodiment, and various modifications of the configuration δ1 can be made within the scope of the invention of 411.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係る構造物の横築工法の一実施例の実
施状況を示す縦断面図、第2図は外力とアースアンカー
のP’C銅撚線張力及び桁造物内の力の関係を示す図表
である。 囚・・・アースアンカー、(Bl・・・ジャケットスト
ラフチャ、(1)・・・地盤、(3)・・・PC鋼撚線
、(3α)・・・碇着部、(3b)(3C)・・・自由
長部、(7)・・・グラウト、(8)・・・アンカーヘ
ッド、10)・・・支圧板 第1M 外: 押 第20 5(w) 第1頁の続き @発明者石井 元悦 広島市西区観音新町4丁目6番2汚 三菱重工業株式会
社広島造船所内
Fig. 1 is a longitudinal cross-sectional view showing the implementation status of one embodiment of the horizontal construction method for structures according to the present invention, and Fig. 2 shows the relationship between external force, P'C copper stranded wire tension of the earth anchor, and force within the girder structure. This is a chart showing the relationship. Prisoner...Earth anchor, (Bl...Jacket strafe, (1)...Ground, (3)...PC steel stranded wire, (3α)...Anchoring part, (3b)( 3C)... Free length part, (7)... Grout, (8)... Anchor head, 10)... Bearing plate No. 1M Outside: Push No. 20 5(w) Continuation of page 1 @ Inventor Motoetsu Ishii 4-6-2 Kannon Shinmachi, Nishi-ku, Hiroshima City, Mitsubishi Heavy Industries, Ltd. Hiroshima Shipyard

Claims (1)

【特許請求の範囲】[Claims] 地盤内に下底部を碇着されたアンカー材の自由長部を前
記地盤上の構造物内に導入緊張し、同構造物に碇着する
ことを特徴とする構造物の構築工法。
A method for constructing a structure, characterized in that a free length part of an anchor material whose lower base is anchored in the ground is introduced into a structure on the ground, tensioned, and anchored to the structure.
JP22675283A 1983-12-02 1983-12-02 Construction work of structure Pending JPS60119817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22675283A JPS60119817A (en) 1983-12-02 1983-12-02 Construction work of structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22675283A JPS60119817A (en) 1983-12-02 1983-12-02 Construction work of structure

Publications (1)

Publication Number Publication Date
JPS60119817A true JPS60119817A (en) 1985-06-27

Family

ID=16850050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22675283A Pending JPS60119817A (en) 1983-12-02 1983-12-02 Construction work of structure

Country Status (1)

Country Link
JP (1) JPS60119817A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6282117A (en) * 1985-10-07 1987-04-15 Taisei Corp Anchor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6282117A (en) * 1985-10-07 1987-04-15 Taisei Corp Anchor

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