JPS6138015A - Sheathing work - Google Patents

Sheathing work

Info

Publication number
JPS6138015A
JPS6138015A JP16118184A JP16118184A JPS6138015A JP S6138015 A JPS6138015 A JP S6138015A JP 16118184 A JP16118184 A JP 16118184A JP 16118184 A JP16118184 A JP 16118184A JP S6138015 A JPS6138015 A JP S6138015A
Authority
JP
Japan
Prior art keywords
sheath
ground
small
pile
excavation
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.)
Granted
Application number
JP16118184A
Other languages
Japanese (ja)
Other versions
JPH0137530B2 (en
Inventor
Kunimitsu Yamada
邦光 山田
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.)
Kensetsu Kiso Engineering Co Ltd
Original Assignee
Kensetsu Kiso Engineering Co 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 Kensetsu Kiso Engineering Co Ltd filed Critical Kensetsu Kiso Engineering Co Ltd
Priority to JP16118184A priority Critical patent/JPS6138015A/en
Publication of JPS6138015A publication Critical patent/JPS6138015A/en
Publication of JPH0137530B2 publication Critical patent/JPH0137530B2/ja
Granted legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

PURPOSE:To make sheathing work easier by a method in which a tension steel member thrust through a sheath is penetrated into an excavated hole, concrete is placed into the hole and the sheath to form a small-diameter pile, and the pile is fixed to the ground by anchors driven into the ground during the excavation. CONSTITUTION:Holes 1 are excavated at an adequate interval in the natural ground, and a tension steel member 2 thrust through a sheath 3 is penetrated into the holes 1. Cement mortar or paste 4 is injected into the holes 1 and the sheath 3 for form a small-diameter pile 5. The ground is excavated in the order of A, B, and C along the pile 5, anchors 6 are driven into the ground during the excavation, and the pile 5 is fixed by an anchor plate 7.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は掘削地山の土留工法に関するものである。[Detailed description of the invention] Industrial applications This invention relates to an earth retaining method for excavated ground.

従来技術 土留工法として広く採用されている工法とじてH形鋼を
適宜間隔離もて地山に下方に向って打ち込み、掘削に従
って木製の矢板を隣シ合うH形鋼間に挿入して地山の崩
壊を防止する工法が存在する。
Conventional earth retaining method is a widely adopted construction method in which H-beams are separated at appropriate intervals and driven downward into the ground, and wooden sheet piles are inserted between adjacent H-beams as the excavation progresses. There are construction methods to prevent collapse.

この工法は現在都市部の大型の工事現場で多く採用され
ている。
This construction method is currently being used at many large-scale construction sites in urban areas.

この発明が解決すべき問題点 しかし上記の工法で問題となるのは山岳部の工事には適
さないことである。すなわち山岳部においては地山が急
勾配であり、工事の規模が非常に小さくH形鋼を打ち込
み、埋設するだけの大きな架設段取りが行えないことが
多いことである。
Problems to be Solved by the Invention However, the problem with the above construction method is that it is not suitable for construction in mountainous areas. In other words, in mountainous areas, the ground is steep and the scale of the construction work is so small that it is often impossible to carry out large-scale erection setups such as driving and burying H-beams.

問題点を解決するための手段 この発明にがかる土留工法は、掘削予定位置に掘削方向
に沿って適宜間隔離して下方に向って削孔を形成し、該
削孔内にシース内に挿通された引張鋼材を挿入し、該削
孔及びシース内にコンクリート等を注入して細径杭を形
成し、掘削に伴って地山に打設したアンカーによって細
径杭を地山に固定することによって上記の問題点を解消
するものである。
Means for Solving the Problems In the earth retaining method according to the present invention, holes are formed downward at appropriate intervals along the excavation direction at the planned excavation location, and a sheath is inserted into the holes. By inserting a tensile steel material and injecting concrete etc. into the drilled hole and sheath to form a small diameter pile, the small diameter pile is fixed to the ground with an anchor driven into the ground during excavation. This solves the problem of.

実施例 以下図に示す実施例に基づきこの発明を施工順序に沿っ
て説明する。
EXAMPLES The present invention will be explained below in accordance with the construction order based on the examples shown in the drawings.

(1)削孔の形成 地山の掘削予定位置に掘削方向に治って適宜間隔離して
下方に向って削孔1を複数形成する。掘削には小口径の
ポーリング機を使用すればよく、現場への搬入、削孔作
業も容易で山岳部での施工に適している。
(1) Formation of Drilled Holes A plurality of drilled holes 1 are formed at the planned excavation position of the ground in the excavation direction and spaced apart appropriately and downward. A small-diameter poling machine can be used for excavation, and it is easy to transport to the site and drill holes, making it suitable for construction in mountainous areas.

(2)引張鋼材の挿入 削孔1内にシース3内に挿通され友引張鋼材2を挿入す
る。
(2) Insertion of tensile steel material A tensile steel material 2 is inserted through the sheath 3 into the drilled hole 1.

引張鋼材2はPCストランド、フレキシブル鉄筋等比較
的屈曲が容易な材料が採用できる。
As the tensile steel material 2, relatively easily bendable materials such as PC strands and flexible reinforcing bars can be used.

シース3としては鋼製の異形スパイラルシース、樹脂系
異形シース、全網製の円筒状シース、薄肉鋼管等が採用
できる。
As the sheath 3, a modified spiral sheath made of steel, a modified resin sheath, a cylindrical sheath made of all-mesh, a thin-walled steel pipe, etc. can be used.

引張鋼材2の下端は掘削予定の道路面等よりも充分深く
位置せしめておく。
The lower end of the tensile steel material 2 is positioned sufficiently deeper than the road surface where excavation is planned.

(3)細径杭の形成 削孔1及びシース3内にモルタル若しくはセメントペー
スト4を注入して細径杭5を形成する。
(3) Forming a small diameter pile Mortar or cement paste 4 is injected into the drilled hole 1 and the sheath 3 to form a small diameter pile 5.

モルタル等4はシース3内にて硬化するため、掘削後に
水平土圧荷重によって細径杭が変形することによって、
モルタル等4にクラック等が発生してもシース3によっ
てモルタル等4が引張鋼材2から剥れることがない。特
に、網状のシース3を使用すればシース3外周のモルタ
ル等4とシース3内のモルタル等4がつながって一体化
でき、従ってモルタル等4の剥離が生じない。
Since the mortar etc. 4 hardens within the sheath 3, the small diameter pile is deformed by the horizontal earth pressure load after excavation.
Even if cracks or the like occur in the mortar or the like 4, the mortar or the like 4 will not be separated from the tensile steel material 2 due to the sheath 3. In particular, if a net-like sheath 3 is used, the mortar, etc. 4 on the outer periphery of the sheath 3 and the mortar, etc. 4 inside the sheath 3 can be connected and integrated, so that separation of the mortar, etc. 4 does not occur.

(4)掘削 地山を掘削予定線、すなわち細径杭5に沿って掘削する
。掘削は第2図に示すように数段階に分け、A、B、C
の順に序々に上方から掘削する。
(4) The excavated ground is excavated along the planned excavation line, that is, along the small diameter piles 5. The excavation is divided into several stages as shown in Figure 2, A, B, and C.
Excavate from above in this order.

(第2図) (5)  アンカー打設 掘削に伴ってアンカー6を細径杭5に沿って打設する。(Figure 2) (5) Anchor placement An anchor 6 is driven along the small diameter pile 5 along with the excavation.

アンカー6としては締付は式アンカー、コンクリート接
着式アンカー等公知のアンカーが使用できる。
As the anchor 6, a known anchor such as a tightening type anchor or a concrete adhesive type anchor can be used.

アンカー6によって細径杭5を固定する。すなわちアン
カー6のアンカープレート7によって細径杭5を押えて
細径杭5を固定する。
A small diameter pile 5 is fixed by an anchor 6. That is, the small diameter pile 5 is held down by the anchor plate 7 of the anchor 6 and the small diameter pile 5 is fixed.

細径杭5に水平土圧荷重がかかった場合、細径杭5は土
圧によって第4図のように屈曲する。細径杭5の直径は
出来るだけ小さい方が施工性が良く、従って経済性が高
いが、あまりに直径が小さいと地山との接触面積が小さ
くなり、地山の支圧耐力が不足し、まだ地山の剪断切れ
が発生する。
When a horizontal earth pressure load is applied to the small diameter pile 5, the small diameter pile 5 is bent as shown in FIG. 4 due to the earth pressure. The smaller the diameter of the small-diameter pile 5, the better the construction is, and therefore the more economical. However, if the diameter is too small, the contact area with the ground will be small, and the bearing capacity of the ground will be insufficient, and the Shear breaks in the ground occur.

細径杭5によって水平土圧荷重を支える場合、第5図に
示すように隣9合う細径杭5,5間の地山内にアーチ作
用が働き、地山の大きな崩壊を防ぐ。
When the horizontal earth pressure load is supported by the small-diameter piles 5, as shown in FIG. 5, an arching effect acts within the ground between the nine adjacent small-diameter piles 5, 5, thereby preventing large collapse of the ground.

(6)  その他 以上のように細径杭5を使用して地山の崩壊を防止する
が、細径杭5をそのまま永久構造物として使用すること
もできる。
(6) Others Although the small-diameter piles 5 are used to prevent the collapse of the ground as described above, the small-diameter piles 5 can also be used as is as a permanent structure.

また隣り合う細径杭5,5はモルタル等7を吹付ける等
、或いは格子状に型枠を組んで型枠内・に鉄筋を配筋し
、コンクリートを打設してコンクリート構造物を構築す
ることができる。
In addition, adjacent small-diameter piles 5 and 5 are sprayed with mortar or the like 7, or a formwork is assembled in a lattice pattern, reinforcing bars are placed inside the formwork, and concrete is poured to construct a concrete structure. be able to.

地山が比較的軟弱な場合は径の大きなシース3を使用し
て地山を支えてもよい。(第6図)発明の効果 この発明は以上のような構成を有するため、以下のよう
な効果を得ることができる。
If the ground is relatively soft, a sheath 3 with a large diameter may be used to support the ground. (FIG. 6) Effects of the Invention Since the present invention has the above-described configuration, the following effects can be obtained.

■ ポーリング機械によって削孔し、シース内に挿通し
た引張鋼材を挿入し、モルタル等を注入して掘削に伴っ
てアンカーによって引張鋼材を固定するだけであるため
、現場への資材、機械等の搬入、施工が容易であり、山
岳部での施工にも適している。
■ The only thing you need to do is to drill a hole with a poling machine, insert the tensile steel material through the sheath, inject mortar, etc., and fix the tensile steel material with anchors as the excavation is carried out, making it easy to transport materials and machinery to the site. It is easy to construct and is suitable for construction in mountainous areas.

@ 細径杭は引張鋼材をシース内に挿通してモルタル等
を注入して地山を支えるため、地山との接触面積が大き
くなり、地力の支圧耐力も充分であり、地山に剪断切れ
が発生することもない。
@ Small-diameter piles support the ground by inserting tensile steel into the sheath and injecting mortar, etc., so the contact area with the ground is large, the bearing capacity of the ground is sufficient, and the pile does not shear into the ground. No breakage occurs.

O引張鋼材はシース内に挿通してモルタル等を注入する
だめ、細径杭が屈曲してもモルタル等が剥離することが
ない。
Since the O-tensile steel material is inserted into the sheath and mortar etc. is injected into it, the mortar etc. will not peel off even if the small diameter pile is bent.

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

第1図及び第2図はこの発明の施工順序縦断面図、第3
図は横断面図、第4図は細径杭の一部縦断面図、第5図
及び第6図は細径杭によって土留している状態の横断面
図、第7図は細径杭の一部拡大縦断面図である。 1・・削孔、2・・引張鋼材、3・・シース、4・・モ
ルタル等、5・・細径杭、6・・アンカ第3図
Figures 1 and 2 are longitudinal cross-sectional views of the construction sequence of this invention;
The figure is a cross-sectional view, Figure 4 is a partial longitudinal cross-sectional view of a small-diameter pile, Figures 5 and 6 are cross-sectional views of a state in which soil is retained by a small-diameter pile, and Figure 7 is a cross-sectional view of a small-diameter pile. It is a partially enlarged vertical cross-sectional view. 1. Hole drilling, 2. Tensile steel material, 3. Sheath, 4. Mortar, etc., 5. Small diameter pile, 6. Anchor Fig. 3

Claims (2)

【特許請求の範囲】[Claims] (1)掘削予定位置に掘削方向に沿って適宜間隔離して
下方に向って削孔を形成し、該削孔内にシース内に挿通
された引張鋼材を挿入し、該削孔及びシース内にコンク
リート等を注入して細径杭を形成し、掘削に伴って地山
に打設したアンカーによって細径杭を地山に固定したこ
とを特徴とする土留工法。
(1) Drill holes are formed downward at appropriate intervals along the excavation direction at the planned excavation location, and a tensile steel material inserted through the sheath is inserted into the drill hole, and the tensile steel material inserted into the sheath is An earth retaining method characterized by forming small-diameter piles by pouring concrete, etc., and fixing the small-diameter piles to the ground using anchors driven into the ground during excavation.
(2)上記工法においてシースとして網状のシースを使
用することを特徴とする特許請求の範囲第1項記載の土
留工法。
(2) The earth retaining method according to claim 1, wherein a net-like sheath is used as the sheath in the method.
JP16118184A 1984-07-31 1984-07-31 Sheathing work Granted JPS6138015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16118184A JPS6138015A (en) 1984-07-31 1984-07-31 Sheathing work

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16118184A JPS6138015A (en) 1984-07-31 1984-07-31 Sheathing work

Publications (2)

Publication Number Publication Date
JPS6138015A true JPS6138015A (en) 1986-02-24
JPH0137530B2 JPH0137530B2 (en) 1989-08-08

Family

ID=15730123

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16118184A Granted JPS6138015A (en) 1984-07-31 1984-07-31 Sheathing work

Country Status (1)

Country Link
JP (1) JPS6138015A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62197520A (en) * 1986-02-26 1987-09-01 Kumagai Gumi Ltd Stabilization of cut ground
JPH03111630U (en) * 1990-02-28 1991-11-15
US6299386B1 (en) * 1999-06-09 2001-10-09 R. John Byrne Method and apparatus for a shoring wall

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62197520A (en) * 1986-02-26 1987-09-01 Kumagai Gumi Ltd Stabilization of cut ground
JPH03111630U (en) * 1990-02-28 1991-11-15
US6299386B1 (en) * 1999-06-09 2001-10-09 R. John Byrne Method and apparatus for a shoring wall

Also Published As

Publication number Publication date
JPH0137530B2 (en) 1989-08-08

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