JP2000226981A - Execution of earth-retaining work for shaft - Google Patents
Execution of earth-retaining work for shaftInfo
- Publication number
- JP2000226981A JP2000226981A JP11029694A JP2969499A JP2000226981A JP 2000226981 A JP2000226981 A JP 2000226981A JP 11029694 A JP11029694 A JP 11029694A JP 2969499 A JP2969499 A JP 2969499A JP 2000226981 A JP2000226981 A JP 2000226981A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- bag body
- fluid
- bag
- gap
- 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
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、立坑の側壁の崩
落や緩みを防止するために、掘削した立坑側壁を順次土
留覆工しながら段階的に掘削して立坑を構築するための
施工法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for constructing a shaft by excavating the shaft of an excavated shaft in a stepwise manner while lining the excavation in order to prevent collapse and loosening of the side wall of the shaft. Things.
【０００２】[0002]
【従来の技術】一般に、深礎工等の立坑を掘削する際に
は、所要深さ掘削した後その側壁の土留をした上で、さ
らにその下方を掘削する必要があるが、従来の立坑側壁
の土留は作業員が孔内に入って人力でコンクリートの吹
き付け作業を行う場合が少なくないが、吹付作業を人力
で行っているため、孔深部では側壁の崩落等の危険が伴
い、安全上問題があった。2. Description of the Related Art In general, when excavating a shaft such as a deep foundation, it is necessary to excavate a required depth, and then dig a ground below the excavation. In many cases, workers enter the holes and spray concrete by hand.However, since the spraying work is performed manually, there is a danger of side walls collapsing at the depth of the hole, which is a safety problem. was there.
【０００３】そのため、掘削から吹付までの作業を機械
化した施工装置として、地上から立坑内に昇降自在に吊
り下げられたガイドパイプや支持架台などの昇降部材に
掘削装置や吹付装置を装備し、掘削と吹付を地上から遠
隔操作で自動的に行うようにした自動掘削吹付装置（特
許第２５５３９８６号、同第２６０２７５３号、同第２
６０４６６９号特開平６−８１５７７号、特開平１０−
１０２９７３号）も各種提案されている。[0003] Therefore, as a construction device which mechanized the work from excavation to spraying, a lifting device such as a guide pipe and a support base suspended from the ground in a vertical shaft is provided with a drilling device and a spraying device. Excavation and spraying equipment that automatically and remotely performs spraying from the ground by remote control (Patent Nos. 2553986, 2602753, and 2nd)
604669, JP-A-6-81577, JP-A-10-
No. 102973) have also been proposed.
【０００４】また、立坑内に支持した支持架台に吹付ノ
ズルを昇降及び旋回自在に設置し、吹付作業を自動的に
行いようにした装置も提案されている（特公平７−８１
４００号）。Further, there has been proposed a device in which a spray nozzle is installed on a support base supported in a shaft so as to be able to move up and down and swivel so as to automatically perform a spraying operation (Japanese Patent Publication No. 7-81).
No. 400).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、自動掘
削吹付装置や自動吹付装置では機械設備が大規模になる
ためコスト高を免れない上に、施工場所によっては機械
の搬入が困難となるなどの問題がある。However, in the automatic excavation spraying apparatus and the automatic spraying apparatus, the cost of the equipment is unavoidable due to the large size of the equipment, and it is difficult to carry in the machine depending on the construction site. There is.
【０００６】[0006]
【課題を解決するための手段】掘削した立坑側壁をモル
タルなどのグラウト材で覆工するための型枠として、柔
軟で気密性を有するシートにより内部が中空で全体が筒
状に形成された膨張収縮自在な袋体を用い、その内部に
エアーや水などの流体を充填して膨張させることによ
り、自立性のある定型的な型枠としての形態に容易に成
形および組立てることができる。As a formwork for covering the excavated shaft of a shaft with a grout material such as mortar, a flexible and airtight sheet is used to form a hollow inside and a tubular body as a whole. By using a shrinkable bag and filling it with a fluid such as air or water to expand it, it can be easily formed and assembled into a self-supporting fixed form.
【０００７】そして、この袋体と立坑側壁との間隙に注
入したグラウト材が硬化した後、この袋体をその内部の
流体を排出させて収縮させることにより、容易にコンク
リートから剥離させて脱型解体することができ、これを
小さく折り畳んで軽量コンパクトな型枠資材として手軽
に持ち運びまたは狭いスペースに収納することが可能と
なり、その後の掘削作業を迅速かつ円滑に行うことがで
きる。After the grout material injected into the gap between the bag and the side wall of the shaft is hardened, the bag is discharged from the concrete and shrunk, thereby easily peeling off the concrete and removing the mold. It can be dismantled, folded small and easily carried as a lightweight and compact form material or stored in a narrow space, and subsequent excavation work can be performed quickly and smoothly.
【０００８】また、袋体を水槽のような有底筒状に形成
し、その内側の空洞部に水を充填することにより、袋体
の型枠としての形態を安定的に保持させ、また充填した
水の重量で袋体の底面を立坑の底部に圧着させて止水シ
ールし、袋体底面からのグラウト材の漏れを確実に防止
することができる。[0008] Further, the bag body is formed into a bottomed cylindrical shape such as a water tank, and water is filled in a cavity inside the bag body so that the form of the bag body as a formwork can be stably maintained. With the weight of the water, the bottom surface of the bag is pressed against the bottom of the shaft to seal the water, and leakage of the grout material from the bottom surface of the bag can be reliably prevented.
【０００９】さらに、袋体底部に粉粒体や液体からなる
錘を設置することにより、その錘の重量と変形自在性に
より袋体の底面を立坑の底部にその凹凸に倣って確実に
圧着させて止水シールし、袋体底面からのグラウト材の
漏れを確実に防止することができる。Further, by installing a weight made of a powder or a granular material or a liquid at the bottom of the bag body, the weight of the weight and its flexibility allow the bottom surface of the bag body to be securely pressed against the bottom of the shaft according to the unevenness. To prevent the grout material from leaking from the bottom surface of the bag body.
【００１０】[0010]
【実施例】図１に示すように、立坑１を所要深度掘削
後、その孔内にゴムシートやゴム引きの布などの柔軟で
気密性をもったシートにより内部が中空で、かつ全体的
に筒状に成形された膨張収縮自在な袋体２を、その上端
に取付けた複数本のワイヤーなどの吊り索３により吊り
込む。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, after a shaft 1 is excavated to a required depth, the inside thereof is hollowed by a flexible and airtight sheet such as a rubber sheet or a rubberized cloth in the hole, and the whole is entirely hollow. An inflatable / contractible bag body 2 formed in a tubular shape is suspended by a suspension cable 3 such as a plurality of wires attached to the upper end thereof.
【００１１】そして、この立坑１内において袋体１の中
空部内に水や気体などの流体４を充填することにより膨
張させて、筒状の型枠としての形態に安定的に保持さ
せ、その外周面が立坑側壁に対して所要間隙（グラウト
材による覆工厚）を保持するように設置する。Then, in the shaft 1, the hollow portion of the bag body 1 is filled with a fluid 4 such as water or gas, so that the fluid is inflated and stably held in the form of a cylindrical mold. The surface shall be installed so as to maintain the required gap (thickness of lining by grout material) with respect to the shaft wall.
【００１２】この袋体２としては、型枠として自立性を
保つために内部を一部の連通孔で一連に連通する多数の
ブロックに区画してブロック毎に膨張収縮するように構
成し、また必要に応じて要所部分に縦横の補強ロッドを
取り付けて全体の強度を強化する。The bag body 2 is structured such that the interior is divided into a large number of blocks that are communicated in series with some of the communication holes in order to maintain independence as a mold frame, and is expanded and contracted for each block. Attach vertical and horizontal reinforcing rods to key points as needed to enhance overall strength.
【００１３】このように袋体２を設置した後、図２に示
すように膨張した袋体１と立坑側壁との間隙内にモルタ
ルやコンクリートなどのグラウト材５を注入し、これが
硬化した後に、図３に示すように袋体１をその内部の流
体を排出することにより収縮させて、脱型する。After the bag 2 has been installed in this way, a grout material 5 such as mortar or concrete is poured into the gap between the expanded bag 1 and the side wall of the shaft as shown in FIG. As shown in FIG. 3, the bag 1 is contracted by discharging the fluid therein, and is released.
【００１４】その後は順次所要深度掘削する都度、各掘
削段階で同様の工程を連続的に繰り返して掘削施工を完
了する。Thereafter, every time the required depth is excavated, the same process is repeated continuously at each excavation stage to complete the excavation.
【００１５】袋体２には、これを立坑１内に設置したと
きにその底面を立坑１の掘削した凹凸のある底部に密接
させて、この底面の接地部において後に打設するグラウ
ト材の漏れを防止するための止水手段を設ける必要があ
る。When the bag body 2 is installed in the shaft 1, the bottom surface of the bag body 2 is brought into close contact with the excavated bottom of the shaft 1, and leakage of grout material to be cast later at the grounding portion of the bottom surface. It is necessary to provide a water stoppage means for preventing water leakage.
【００１６】この止水手段として図４、図５に示す実施
例においては、袋体１を立坑１の掘削高さよりも高さの
高い有底筒状の水槽形状に形成し、この袋体１を立坑１
内に吊り込んでその中空部内に流体４を注入して膨張さ
せた後、この袋体１の内側の空洞部内に水６を充填し、
この水の重量で底面を立坑１の底部に圧着させ、立坑底
部の凹凸に倣って袋体１の底面を密着接地させること
で、止水シールするように構成する。In the embodiment shown in FIGS. 4 and 5, the bag 1 is formed as a bottomed cylindrical water tank having a height higher than the excavation height of the shaft 1, and the bag 1 is used as the water stopping means. Shaft 1
After inflation and inflation of the fluid 4 into the hollow portion of the bag 1, the cavity 6 inside the bag 1 is filled with water 6.
With the weight of the water, the bottom surface is pressed against the bottom of the shaft 1, and the bottom surface of the bag 1 is closely contacted and grounded according to the unevenness of the shaft bottom, so as to seal the water stop.
【００１７】さらに他の止水手段として図６、図７に示
す実施例においては、袋体１の底部に砂などの粉粒体や
水、シリコーンなどの液体（ゲル状を含む）からなる錘
７を設置することにより、その錘の重量と変形自在性に
より袋体の底面を立坑の底部にその凹凸に倣って密着接
地させることで、止水シールするように構成する。In the embodiment shown in FIGS. 6 and 7 as still another water stopping means, a weight made of a powder (such as sand) or a liquid (including gel) such as water or silicone is provided on the bottom of the bag 1. By installing 7, the bottom surface of the bag body is brought into close contact with the bottom of the shaft according to the unevenness due to the weight and deformability of the weight, so as to seal the water stop.
【００１８】[0018]
【発明の効果】以上の通りこの発明によれば、膨張収縮
自在な袋体の内部にエアーや水などの流体を充填して膨
張させることにより、自立性のある定型的な型枠として
の形態に容易に成形および組立てることができる。As described above, according to the present invention, a self-supporting fixed form is formed by filling a fluid such as air or water into the inflatable and contractible bag to expand the bag. It can be easily molded and assembled.
【００１９】また、この型枠と立坑側壁との間隙に注入
したコンクリートが硬化した後、この袋体をその内部の
流体を排出させて収縮させることにより、容易にコンク
リートから剥離させて脱型解体することができ、これを
小さく折り畳んで軽量コンパクトな型枠資材として手軽
に持ち運びまたは狭いスペースに収納することが可能と
なり、その後の掘削作業を迅速かつ円滑に行うことがで
きる。Further, after the concrete poured into the gap between the formwork and the side wall of the shaft is hardened, the bag body is discharged to discharge the fluid therein and shrink, so that the bag body is easily peeled off from the concrete to be dismantled. This makes it possible to easily carry it or store it in a narrow space as a lightweight and compact form material by folding it small, so that subsequent excavation work can be performed quickly and smoothly.
【００２０】また、袋体を水槽のような有底筒状に形成
し、その内側の空洞部に水を充填することにより、型枠
としての袋体の形態を安定的に保持させ、また充填した
水の重量で袋体の底面を立坑の底部に圧着させて止水シ
ールし、袋体底面からのグラウト材の漏れを確実に防止
することができる。Further, the bag body is formed into a bottomed cylindrical shape such as a water tank, and water is filled into a hollow portion inside the bag body, so that the form of the bag body as a mold can be stably maintained. With the weight of the water, the bottom surface of the bag is pressed against the bottom of the shaft to seal the water, and leakage of the grout material from the bottom surface of the bag can be reliably prevented.
【００２１】さらに、袋体底部に粉粒体や液体からなる
錘を設置することにより、その錘の重量と変形自在性に
より袋体の底面を立坑の底部にその凹凸に倣って確実に
圧着させて止水シールし、同様に袋体底面からのグラウ
ト材の漏れを確実に防止することができる。Further, by installing a weight made of a powder or a granular material or a liquid at the bottom of the bag body, the weight of the weight and its flexibility allow the bottom surface of the bag body to be securely pressed against the bottom of the shaft according to the unevenness. To prevent the grout material from leaking from the bottom surface of the bag body.
【図１】この発明による袋体の設置状態を示す縦断正面
図である。FIG. 1 is a vertical sectional front view showing an installed state of a bag according to the present invention.
【図２】この発明によるグラウト材の打設状態を示す縦
断正面図である。FIG. 2 is a longitudinal sectional front view showing a grouting state according to the present invention.
【図３】この発明による袋体の収縮状態を示す縦断正面
図である。FIG. 3 is a vertical sectional front view showing a contracted state of the bag body according to the present invention.
【図４】この発明による他の態様の袋体の設置状態を示
す縦断正面図である。FIG. 4 is a longitudinal sectional front view showing an installed state of a bag according to another embodiment of the present invention.
【図５】この発明による他の態様の袋体を用いた場合の
グラウト材の打設状態を示す縦断正面図である。FIG. 5 is a vertical sectional front view showing a grouting state when a bag according to another embodiment of the present invention is used.
【図６】この発明によるさらに他の態様の袋体の設置状
態を示す縦断正面図である。FIG. 6 is a longitudinal sectional front view showing a state of installation of a bag according to still another embodiment of the present invention.
【図７】この発明によるさらに他の態様の袋体を用いた
場合のグラウト材の打設状態を示す縦断正面図である。 １ 立坑 ２ 袋体 ３ 吊り索 ４ 流体 ５ グラウト材 ６ 水 ７ 錘FIG. 7 is a longitudinal sectional front view showing a grouting state when a bag according to still another embodiment of the present invention is used. DESCRIPTION OF SYMBOLS 1 Vertical shaft 2 Bag body 3 Hanging cable 4 Fluid 5 Grout material 6 Water 7 Weight
Claims (3)
の各段階において、柔軟で気密性を有するシートにより
内部が中空で全体が筒状に形成された膨張収縮自在な袋
体を、その中空部内に流体を充填することにより膨張さ
せてその外周面が立坑側壁に対して所要間隙を保持する
型枠として設置し、この膨張した袋体と立坑側壁との間
隙内にモルタル等のグラウト材を注入し、このグラウト
材が硬化した後、前記袋体をその内部の流体を排出する
ことにより収縮させて脱型することを特徴とする立坑土
留工の施工法。When a shaft is excavated at a required depth stepwise, in each stage of excavation, a flexible and airtight sheet is used to form an inflatable and contractible bag body having a hollow inside and a cylindrical shape as a whole. The hollow portion is expanded by filling with a fluid, and the outer peripheral surface is installed as a formwork that maintains a required gap with respect to the shaft wall, and grout such as mortar is placed in the gap between the expanded bag body and the shaft wall. Material is injected, and after the grout material is hardened, the bag body is contracted by discharging a fluid inside the grout material, and the bag is released from the mold.
の各段階において、柔軟で気密性を有するシートにより
内部が中空で全体が有底筒状に形成された膨張収縮自在
な袋体を、その中空部内に流体を充填することにより膨
張させ、さらにその内側の空洞部に水を充填することに
より所定形状に保持させて、その外周面が立坑側壁に対
して所要間隙を保持する型枠として設置し、この袋体と
立坑側壁との間隙内にモルタル等のグラウト材を注入
し、このグラウト材が硬化した後、前記袋体をその内部
の流体及び空洞部内の水を排出することにより収縮させ
て脱型することを特徴とする立坑土留工の施工法。2. An inflatable and shrinkable bag body having a hollow interior and a bottomed cylindrical shape formed by a flexible and airtight sheet at each stage of excavation when excavating a shaft at a required depth. Is filled with a fluid in the hollow portion to expand the fluid, and further filled into the hollow portion with water to maintain a predetermined shape, and the outer peripheral surface of the mold has a required gap with respect to the shaft wall. It is installed as a frame, a grout material such as mortar is injected into a gap between the bag body and the side wall of the shaft, and after the grout material is hardened, the bag body is drained of fluid therein and water in the cavity. A method for constructing a vertical shaft earth retaining method, wherein the shaft is contracted and removed from the mold.
の各段階において、柔軟で気密性を有するシートにより
内部が中空で全体が筒状に形成され、かつ底部に粉粒体
や液体からなる錘を設置した膨張収縮自在な袋体を、そ
の中空部内に流体を充填することにより膨張させてその
外周面が立坑側壁に対して所要間隙を保持し、かつ前記
袋体の底面を前記錘により立坑底部に密着させた型枠と
して設置し、この袋体と立坑側壁との間隙内にモルタル
等のグラウト材を注入し、これが硬化後前記袋体をその
内部の流体及び空洞部内の水を排出することにより収縮
させて脱型することを特徴とする立坑土留工の施工法。3. When excavating a shaft in a required depth stepwise, at each stage of excavation, a flexible and airtight sheet is used to form a hollow and entirely cylindrical body, and a granular material or liquid is formed at the bottom. An inflatable and deflated bag body provided with a weight consisting of is inflated by filling a fluid into a hollow portion thereof so that an outer peripheral surface thereof maintains a required gap with respect to a shaft wall, and the bottom surface of the bag body is A grout material such as mortar is injected into the gap between the bag body and the side wall of the shaft, and the bag body is cured. A method of constructing a vertical shaft excavation, which is characterized in that it is shrunk by discharging air to remove it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11029694A JP2000226981A (en) | 1999-02-08 | 1999-02-08 | Execution of earth-retaining work for shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11029694A JP2000226981A (en) | 1999-02-08 | 1999-02-08 | Execution of earth-retaining work for shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000226981A true JP2000226981A (en) | 2000-08-15 |
Family
ID=12283225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11029694A Pending JP2000226981A (en) | 1999-02-08 | 1999-02-08 | Execution of earth-retaining work for shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000226981A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100944873B1 (en) | 2009-06-05 | 2010-03-04 | 이영암 | Manufacturing method of grounding stone made from concrete |
| CN106836258A (en) * | 2017-03-27 | 2017-06-13 | 中国十七冶集团有限公司 | A kind of large-scale ground storehouse basis foundation trench uses interior formwork rapid constructing method |
| CN108560545A (en) * | 2018-05-24 | 2018-09-21 | 中国建筑第八工程局有限公司 | The construction method of the anti-collapse hole of rotary digging stake and anti-collapse aperture apparatus |
-
1999
- 1999-02-08 JP JP11029694A patent/JP2000226981A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100944873B1 (en) | 2009-06-05 | 2010-03-04 | 이영암 | Manufacturing method of grounding stone made from concrete |
| CN106836258A (en) * | 2017-03-27 | 2017-06-13 | 中国十七冶集团有限公司 | A kind of large-scale ground storehouse basis foundation trench uses interior formwork rapid constructing method |
| CN108560545A (en) * | 2018-05-24 | 2018-09-21 | 中国建筑第八工程局有限公司 | The construction method of the anti-collapse hole of rotary digging stake and anti-collapse aperture apparatus |
| CN108560545B (en) * | 2018-05-24 | 2020-10-27 | 中国建筑第八工程局有限公司 | Construction method for preventing hole collapse of rotary digging pile and hole collapse preventing device |
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