JPH0461132B2 - - Google Patents
Info
- Publication number
- JPH0461132B2 JPH0461132B2 JP60193423A JP19342385A JPH0461132B2 JP H0461132 B2 JPH0461132 B2 JP H0461132B2 JP 60193423 A JP60193423 A JP 60193423A JP 19342385 A JP19342385 A JP 19342385A JP H0461132 B2 JPH0461132 B2 JP H0461132B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- earth retaining
- wire mesh
- reinforcing wire
- arch
- 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.)
- Expired - Lifetime
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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安定化を図る土留工法に
関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an earth retaining method for stabilizing excavated ground.
本件発明者は既に特願昭55−20844号（特公昭
59−25051号）として、アーチ状に掘削した地山
に型枠を格子状に組み、硬化材を吹付けて土留梁
枠を構築する土留工法を開示している。
The inventor of this case has already filed Japanese Patent Application No. 55-20844.
No. 59-25051) discloses an earth retaining method in which formwork is assembled in a lattice pattern on a ground excavated in an arch shape, and a hardening material is sprayed to construct an earth retaining beam frame.
土留梁枠はアーチ状となり、既にトンネル、ダ
ム等において採用されて確認済みである通り、ア
ーチ形状は荷重に対し極めて顕著な耐力を示し、
前記出願においても、水平方向の優れたアーチ効
果を得ることができる。 The earth retaining beam frame has an arch shape, and as has already been confirmed by being used in tunnels, dams, etc., the arch shape exhibits extremely significant load resistance.
Also in the above application, an excellent arch effect in the horizontal direction can be obtained.
上記の発明は土留工法として極めて有効な効果
を得ることができるが、地山に沿つて型枠を組む
という作業が必要である。
Although the above-mentioned invention can achieve extremely effective effects as an earth retaining method, it requires the work of assembling formwork along the ground.
また、比較的崩落の危険性の小さい地山におい
ては、土留梁枠を構築することまでは必要のない
場合もあり、また単なる従来の吹付け工法では不
安が残ることもある。 Furthermore, in geological formations where the risk of collapse is relatively low, it may not be necessary to construct a retaining beam frame, and there may be concerns about simply using the conventional spraying method.
更に格子状の梁では格子梁の間の土砂が抜け出
す危険性があり、作業員の安全の問題が生じてい
た。 Furthermore, with lattice-shaped beams, there is a risk that earth and sand may escape between the lattice beams, creating a safety issue for workers.
この発明は、吹付け土留工法においてアーチ効
果を導入したもので、地山を横断面が地山方向に
凸状のアーチ形が連続するよう、かつ傾斜面とな
るように掘削し、アーチ部とアーチ部との境界部
に沿つて地盤に打込まれた杭を地山へ略直角に埋
設した複数のアンカーによつて固定し、次いで地
山に沿つて補強金網部材を敷設し掘削地山にセメ
ント系硬化材を吹付け、土留壁を構築するもので
ある。
This invention introduces an arch effect in the sprayed earth retaining method, and excavates the ground so that the cross section is a continuous convex arch shape in the direction of the ground and has an inclined surface. Piles driven into the ground along the boundary with the arch are fixed with multiple anchors buried approximately perpendicular to the ground, and then reinforcing wire mesh members are laid along the ground to attach to the excavated ground. A retaining wall is constructed by spraying cement-based hardening material.
吹付け硬化材のアーチ部材としての効果によつ
て、施工の簡易性と経済性の高い土留工を可能と
したものである。 The effectiveness of the spray hardened material as an arch member has made it possible to construct earth retaining structures that are simple and highly economical.
また補強金網部材によつて施工中の地山の崩落
を防止する。 Additionally, the reinforcing wire mesh members will prevent the ground from collapsing during construction.
以下図に示す一実施例に基づきこの考案を詳細
に説明する。
This invention will be explained in detail below based on an embodiment shown in the drawings.
(1) 掘削（第２図、第５図）
地山１を掘削する。地山１は地山に向かつて凸
状となる複数の横断面アーチ形が左右に連続する
よう掘削する。(1) Excavation (Figures 2 and 5) Excavate the ground 1. The ground 1 is excavated so that a plurality of arch-shaped cross sections that become convex toward the ground are continuous from side to side.
(2) アンカーの打設（第６図）
地山１のアーチ部とアーチ部との境界部Ａに沿
つて杭６を地盤へ打設し、境界部Ａに複数のアン
カー２を打設し杭６をアンカー２によつて固定す
る。アンカー２としては公知の様々な形式のもの
が使用できる。(2) Driving anchors (Fig. 6) Pile 6 is driven into the ground along boundary A between the arches of the ground 1, and multiple anchors 2 are driven in boundary A. The pile 6 is fixed by the anchor 2. As the anchor 2, various known types can be used.
(3) 補強金網部材の敷設（第３図、第７図）
地山１に沿つて補強金網部材３を敷設する。補
強金網部材３としては鉄筋を格子状に組んだもの
や、エキスパンドメタル等が使用可能である。(3) Laying the reinforcing wire mesh members (Figures 3 and 7) Laying the reinforcing wire mesh members 3 along the ground 1. As the reinforcing wire mesh member 3, a material made of reinforcing bars arranged in a lattice shape, expanded metal, etc. can be used.
この補強金網部材３を横断面円弧状に屈曲して
地山１に沿わし、定着金具又は溶接等によつてア
ンカー２に固定する。 This reinforcing wire mesh member 3 is bent to have an arcuate cross section, placed along the ground 1, and fixed to the anchor 2 by a fixing metal fitting, welding, or the like.
補強金網部材３を地山に沿わして敷設するの
で、施工中の地山の崩落を防ぎ作業員の安全を確
保できる。 Since the reinforcing wire mesh member 3 is laid along the ground, it is possible to prevent the ground from collapsing during construction and ensure the safety of workers.
(4) セメント系硬化材の吹付け（第８図）
地山１へモルタル、コンクリート等のセメント
系硬化材４を吹付け、アーチ形状の土留壁５を構
築する。(4) Spraying of cement-based hardening material (Figure 8) A cement-based hardening material 4 such as mortar or concrete is sprayed onto the ground 1 to construct an arch-shaped retaining wall 5.
アーチ形状の土留壁５は単にフラツトな土留壁
と異なり、アーチ効果によつて極めて大きな耐力
を得ることができる。すなわちフラツトな土留壁
において地山が崩壊するときは曲げにより破壊力
として作用するが、この発明のアーチ形状の土留
壁５は土圧が圧縮力として作用し、圧縮力に対し
強度を発揮するセメント系硬化材によつて構築し
た土留壁５は極めて大きな耐力を示す。 The arch-shaped earth retaining wall 5 is different from a simply flat earth retaining wall, and can obtain an extremely large strength due to the arch effect. In other words, when the ground collapses in a flat earth retaining wall, the bending acts as a destructive force, but in the arch-shaped earth retaining wall 5 of this invention, the earth pressure acts as a compressive force, and cement is used to exert strength against the compressive force. The earth retaining wall 5 constructed from hardened material exhibits extremely high strength.
掘削方向の鉛直の杭（又は柱）６をアンカー２
の反力点に使用することが出来るので、水平方向
の梁は実質的に必要なく、経済性が高い施工が可
能となる。 Anchor 2 with a vertical pile (or pillar) 6 in the excavation direction
Since it can be used as a reaction force point, there is virtually no need for horizontal beams, allowing for highly economical construction.
この発明は以上のような構成を有し、地山を横
断面がその方向に凸状のアーチ形が連続するよう
な傾斜面に掘削し、アーチ部とアーチ部との境界
部に沿つて地盤に打込まれた杭を地山へ略直角に
埋設したアンカーによつて固定し、地山に沿つて
補強金網部材を敷設しセメント系硬化材を吹付け
構築するものであるから、極めて簡易な施工で、
経済的に極めて大きな耐力を得ることが可能な土
留壁を施工可能となる。
This invention has the above-mentioned configuration, and excavates the ground into an inclined surface with a convex arch shape that continues in the cross section in that direction, and excavates the ground along the boundary between the arch parts. The construction method is extremely simple, as the piles driven into the ground are fixed with anchors buried approximately perpendicularly into the ground, reinforcing wire mesh members are laid along the ground, and cement-based hardening material is sprayed. In construction,
It becomes possible to construct earth retaining walls that can economically obtain extremely high bearing strength.
また補強金網部材を地山を敷設することによつ
て施工中の地山の小さに崩落を防ぐことができ、
作業員の安全を確保できる。 In addition, by laying reinforced wire mesh members on the ground, it is possible to prevent small collapses of the ground during construction.
The safety of workers can be ensured.
第１図はこの発明の一実施例の斜視図、第２図
〜第４図は施工順序の縦断面図、第５図〜第８図
は施工順序の横断面図である。
１……地山、２……アンカー、３……補強金網
部材、４……セメント系硬化材、５……土留壁、
６……杭。
FIG. 1 is a perspective view of one embodiment of the present invention, FIGS. 2 to 4 are longitudinal cross-sectional views of the construction sequence, and FIGS. 5 to 8 are cross-sectional views of the construction sequence. 1... Earth, 2... Anchor, 3... Reinforced wire mesh member, 4... Cement-based hardening material, 5... Earth retaining wall,
6...Pile.
Claims (1)
連続するよう、かつ傾斜面となるように掘削し、
アーチ部とアーチ部との境界部に沿つて地盤に打
込まれた杭を地山へ略直角に埋設した複数のアン
カーによつて固定し、次いで地山に沿つて補強金
網部材を敷設し掘削地山にセメント系硬化材を吹
付け土留壁を構築することを特徴とする土留工
法。 ２ 補強金網部材は鉄筋を素材としたことを特徴
とする特許請求の範囲第１項記載の土留工法。 ３ 補強金網部材をエキスパンドメタルとしたこ
とを特徴とする特許請求の範囲第１項記載の土留
工法。[Claims] 1. Excavating the ground so that the cross section has a continuous convex arch shape in the direction of the ground and has an inclined surface,
Piles driven into the ground along the boundaries between the arches are fixed with multiple anchors buried approximately at right angles to the ground, then reinforcing wire mesh members are laid along the ground and excavated. An earth retaining method characterized by constructing an earth retaining wall by spraying cement-based hardening material onto the ground. 2. The earth retaining method according to claim 1, wherein the reinforcing wire mesh member is made of reinforcing bars. 3. The earth retaining method according to claim 1, characterized in that the reinforcing wire mesh member is made of expanded metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19342385A JPS6255328A (en) | 1985-09-02 | 1985-09-02 | Sheathing work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19342385A JPS6255328A (en) | 1985-09-02 | 1985-09-02 | Sheathing work |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6255328A JPS6255328A (en) | 1987-03-11 |
| JPH0461132B2 true JPH0461132B2 (en) | 1992-09-30 |
Family
ID=16307721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19342385A Granted JPS6255328A (en) | 1985-09-02 | 1985-09-02 | Sheathing work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6255328A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57130629A (en) * | 1981-02-06 | 1982-08-13 | Nittoku Kensetsu Kk | Laying of metal netting in slope protection work |
-
1985
- 1985-09-02 JP JP19342385A patent/JPS6255328A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57130629A (en) * | 1981-02-06 | 1982-08-13 | Nittoku Kensetsu Kk | Laying of metal netting in slope protection work |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6255328A (en) | 1987-03-11 |
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