JP2903081B2 - Shaft passing method of shield construction - Google Patents
Shaft passing method of shield constructionInfo
- Publication number
- JP2903081B2 JP2903081B2 JP30849294A JP30849294A JP2903081B2 JP 2903081 B2 JP2903081 B2 JP 2903081B2 JP 30849294 A JP30849294 A JP 30849294A JP 30849294 A JP30849294 A JP 30849294A JP 2903081 B2 JP2903081 B2 JP 2903081B2
- Authority
- JP
- Japan
- Prior art keywords
- caisson
- shield
- passage
- construction
- shaft
- 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 - Fee Related
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、シールド工事の立坑通
過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 shaft passage method for shield work.
【０００２】[0002]
【従来の技術】シールド工事において、中間立坑を先に
構築しておいて、シールド機をそのまま通過（スルー）
させる工法は最近、施工例が増加している。2. Description of the Related Art In shield construction, an intermediate shaft is constructed first, and the shield machine is passed as it is (through).
Recently, the number of construction methods has increased.
【０００３】従来の工法は、図４に示すように、立坑構
築としてケーソン１をニューマチックケーソン工法で沈
設する。このケーソン１の側壁には通過坑口２が設けら
れているが、この通過坑口２は鋼板等の仮壁３で閉塞し
てケーソン１の沈設に支障のないようにしている。In a conventional method, as shown in FIG. 4, a caisson 1 is laid by a pneumatic caisson method as a shaft. A passage wellhead 2 is provided on the side wall of the caisson 1. The passage wellhead 2 is closed by a temporary wall 3 made of a steel plate or the like so that the caisson 1 is not obstructed.
【０００４】図５に示すようにケーソン１が所定の深度
まで沈設したならば、図６に示すように通過坑口２の周
囲はコラムジェットグラウト工法等の薬液注入工法等で
地盤改良４を施すとともに仮壁３を撤去して、図７に示
すようにケーソン１の内部に発泡モルタル５を打設す
る。[0004] When the caisson 1 is sunk to a predetermined depth as shown in FIG. 5, as shown in FIG. 6, ground improvement 4 is performed around the passage wellhead 2 by a chemical injection method such as a column jet grout method. The temporary wall 3 is removed, and a foam mortar 5 is cast inside the caisson 1 as shown in FIG.
【０００５】このようにしてから通過坑口２を介して発
泡モルタル５をシールドマシンで切削してケーソン１を
貫通させてシールドを施工する。[0005] After that, the foam mortar 5 is cut by the shield machine through the passage well 2 and the caisson 1 is penetrated to perform the shield.
【０００６】[0006]
【発明が解決しようとする課題】前記従来の工法では、
ケーソン１を所定の深度まで沈設した立坑の構築後に仮
壁３を撤去するが、この時の土圧および水圧に対抗する
地盤改良４のゾーンが必要となる。特に深度が深い場合
にはその時の漏水等が問題となり、地盤改良４の範囲も
増大し、地盤改良である補助工法の工期と費用も大きな
ものとなる。In the above-mentioned conventional method,
The temporary wall 3 is removed after the construction of the shaft in which the caisson 1 is sunk to a predetermined depth. In particular, when the depth is deep, water leakage or the like at that time becomes a problem, the range of the ground improvement 4 increases, and the construction period and cost of the auxiliary construction method for the ground improvement become large.
【０００７】本発明の目的は前記従来例の不都合を解消
し、地盤改良の範囲が不要か、もしくは従来よりも非常
に少なくてすみ、工費が低廉で、工期も短縮でき、ま
た、仮壁解体時の地山開放状況も無くなるので安定した
施工が得られるシールド工事の立坑通過工法を提供する
ことにある。An object of the present invention is to eliminate the disadvantages of the above-mentioned prior art and to eliminate the need for ground improvement or to make it much smaller than before, to reduce the construction cost, shorten the construction period, and dismantle the temporary wall. An object of the present invention is to provide a shaft passage method for shield work in which stable construction can be obtained because the situation of open ground at the time is eliminated.
【０００８】[0008]
【課題を解決するための手段】本発明は前記目的を達成
するため、シールドの通過坑口を有するケーソンの内部
に予め発泡モルタルを充填しておき、このケーソンを立
坑を構築するものとして沈設後、前記通過坑口を介して
シールドを前記ケーソンの発泡モルタル充填部に貫通さ
せること、および、通過坑口周囲には地盤改良を施すこ
とを要旨とするものである。According to the present invention, in order to achieve the above object, a caisson having a shield wellhead is filled with foam mortar in advance, and the caisson is laid as a construction of a shaft, The gist of the present invention is to penetrate a shield through the filling portion of the foam mortar of the caisson through the passage wellhead, and to perform ground improvement around the passage wellhead.
【０００９】[0009]
【作用】請求項１記載の本発明によれば、シールドの通
過坑口を有するケーソンの内部は予め発泡モルタルで充
填されているので、このケーソンを沈設するのに、通過
坑口を仮壁で閉塞する必要がないか、簡単なものでよ
く、また、通過坑口を介して地下水や土砂がケーソン内
部に流入するおそれもない。According to the first aspect of the present invention, the inside of the caisson having the passage wellhead of the shield is previously filled with the foam mortar. Therefore, when the caisson is laid, the passage wellhead is closed with the temporary wall. It is not necessary or simple, and there is no danger of groundwater or sediment flowing into the caisson through the passageway.
【００１０】請求項２記載の本発明によれば、前記作用
に加えて、通過坑周囲には地盤改良を施すことにより、
シールドマシンが発泡モルタルを切削・解体した時のシ
ールドマシンテールボイドの土圧および水圧の抵抗とす
ることができ、テールボイドの隙間は小さいので、この
地盤改良はごく僅かなものでよい。According to the second aspect of the present invention, in addition to the above-mentioned operation, by performing ground improvement around the passage pit,
When the shield machine cuts and dismantles the foam mortar, the earth pressure and the water pressure resistance of the shield machine tail void can be used. Since the gap between the tail voids is small, this ground improvement may be very small.
【００１１】[0011]
【実施例】以下、図面について本発明の実施例を詳細に
説明する。図１〜図３は本発明のシールド工事の立坑通
過工法の各工程を示す縦断正面図であり、前記従来例を
示す図４〜図７と同一構成要素には同一参照符号を付し
たものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 are vertical sectional front views showing respective steps of a shaft passage construction method of shield construction according to the present invention, and the same components as those in FIGS. 4 to 7 showing the conventional example are denoted by the same reference numerals. is there.
【００１２】立坑構築としては側壁に通過坑口２を設け
たケーソン１をニューマチックケーソン工法で沈設する
点は前記従来例と同じであるが、図１に示すように、こ
のケーソン１は内部に予め発泡モルタル５を充填してお
く。In the construction of a shaft, the caisson 1 provided with the passage portal 2 on the side wall is laid down by the pneumatic caisson method as in the prior art, but as shown in FIG. The mortar 5 is filled in advance.
【００１３】なお、通過坑口２はそのまま開放したもの
でもよいが、無収縮モルタル６で簡易な閉塞を行ってお
いてもよい。Although the passage well 2 may be opened as it is, it may be simply closed with a non-shrink mortar 6.
【００１４】このようにして図２に示すように、予め発
泡モルタル５を充填したケーソン１をニューマチックケ
ーソン工法で所定深度まで沈設する。As shown in FIG. 2, the caisson 1 previously filled with the foam mortar 5 is laid down to a predetermined depth by the pneumatic caisson method.
【００１５】そして、前記通過坑口２を介してシールド
マシンで前記無収縮モルタル６および発泡モルタル５を
切削し、ケーソン１を横方向に貫通するシールドを施工
する。Then, the non-shrinkable mortar 6 and the foamed mortar 5 are cut by the shield machine through the passing wellhead 2, and a shield penetrating the caisson 1 in the lateral direction is installed.
【００１６】なお、その際、通過坑口２の周囲には地盤
改良４を施しておけば、前記無収縮モルタル６や発泡モ
ルタル５の解体時のシールドマシンテールボイドの土
圧、水圧に対抗することができる。この地盤改良４はわ
ずかな範囲のものでよい。At this time, if the ground improvement 4 is provided around the passage wellhead 2, the earth pressure and the water pressure of the shield machine tail void at the time of dismantling the non-shrink mortar 6 and the foam mortar 5 can be improved. it can. This ground improvement 4 may be of a small range.
【００１７】[0017]
【発明の効果】以上述べたように本発明のシールド工事
の立坑通過工法は、地盤改良の範囲が不要か、もしくは
従来よりも非常に少なくてすみ、工費が低廉で、工期も
短縮できるものである。また、仮壁解体時の地山開放状
況も無くなるので安定した施工が得られるものである。As described above, the shaft passage method of shield construction according to the present invention does not require or requires much less ground improvement, and the construction cost is low and the construction period can be shortened. is there. In addition, since there is no need to open the ground when the temporary wall is dismantled, stable construction can be obtained.
【図１】本発明のシールド工事の立坑通過工法の第１工
程を示す縦断正面図である。FIG. 1 is a vertical sectional front view showing a first step of a shaft passage construction method of shield work according to the present invention.
【図２】本発明のシールド工事の立坑通過工法の第２工
程を示す縦断正面図である。FIG. 2 is a vertical sectional front view showing a second step of the shaft passage construction method of the shield work according to the present invention.
【図３】本発明のシールド工事の立坑通過工法の第３工
程を示す縦断正面図である。FIG. 3 is a vertical sectional front view showing a third step of the shaft passage construction method of the shield construction according to the present invention.
【図４】従来例を示す第１工程の縦断正面図である。FIG. 4 is a vertical front view of a first step showing a conventional example.
【図５】従来例を示す第２工程の縦断正面図である。FIG. 5 is a vertical sectional front view of a second step showing a conventional example.
【図６】従来例を示す第３工程の縦断正面図である。FIG. 6 is a vertical sectional front view of a third step showing a conventional example.
【図７】従来例を示す第４工程の縦断正面図である。FIG. 7 is a vertical sectional front view of a fourth step showing a conventional example.
１…ケーソン ２…通過坑口 ３…仮壁 ４…地盤改良 ５…発泡モルタル ６…無収縮モル
タルDESCRIPTION OF SYMBOLS 1 ... Caisson 2 ... Passing wellhead 3 ... Temporary wall 4 ... Ground improvement 5 ... Foaming mortar 6 ... Non-shrink mortar
フロントページの続き (72)発明者 大脇 正志 東京都港区元赤坂一丁目３番８号 鹿島 建設株式会社 東京支店内 (72)発明者 桑原 弘昌 東京都港区芝浦四丁目16番36号 東京電 力株式会社 地中線建設所内 (72)発明者 大塚 幸男 東京都港区芝浦四丁目16番36号 東京電 力株式会社 地中線建設所内 (72)発明者 清水 幸政 東京都港区芝浦四丁目16番36号 東京電 力株式会社 地中線建設所内 (72)発明者 神尾 正充 東京都港区芝浦四丁目16番36号 東京電 力株式会社 地中線建設所内 (72)発明者 伊藤 輝一 東京都千代田区内幸町一丁目１番３号 東京電力株式会社 送変電建設本部内 (72)発明者 細谷 道隆 群馬県前橋市本町一丁目８番16号 東京 電力株式会社 群馬支店内 (58)調査した分野(Int.Cl.6，ＤＢ名) E21D 9/06 301 Continued on the front page (72) Inventor Masashi Owaki 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Hiromasa Kuwahara 4--16-36 Shibaura, Minato-ku, Tokyo TEPCO (72) Inventor Yukio Otsuka 4--16, Shibaura, Minato-ku, Tokyo Tokyo Electric Power Co., Ltd. Underground Line Construction (72) Inventor Yukimasa Shimizu 4-chome Shibaura, Minato-ku, Tokyo 16-36 Tokyo Electric Power Co., Ltd. Underground Line Construction Plant (72) Inventor Masamitsu Kamio 16-36-36 Shibaura, Minato-ku, Tokyo Tokyo Electric Power Company Co., Ltd. Underground Line Construction Plant (72) Inventor Teruichi Ito 1-3-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Co., Inc.Transmission and Substation Construction Headquarters (72) Inventor Michitaka Hosoya 1-8-16 Honcho, Maebashi-shi, Gunma Prefecture Tokyo Electric Power Co., Inc.Gunma Branch (58) Field (Int.Cl. 6 , DB name) E21D 9/06 301
Claims (2)
内部に予め発泡モルタルを充填しておき、このケーソン
を立坑を構築するものとして沈設後、前記通過坑口を介
してシールドを前記ケーソンの発泡モルタル充填部に貫
通させることを特徴としたシールド工事の立坑通過工
法。1. A caisson having a shield passage through-hole is filled with foam mortar in advance, and the caisson is laid as a vertical shaft, and then the shield is filled through the passage well with the caisson. Shaft passing method of shield construction characterized by penetrating through the section.
１記載のシールド工事の立坑通過工法。2. The vertical shaft passage method for shield work according to claim 1, wherein the ground is improved around the passage entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30849294A JP2903081B2 (en) | 1994-12-13 | 1994-12-13 | Shaft passing method of shield construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30849294A JP2903081B2 (en) | 1994-12-13 | 1994-12-13 | Shaft passing method of shield construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08165896A JPH08165896A (en) | 1996-06-25 |
| JP2903081B2 true JP2903081B2 (en) | 1999-06-07 |
Family
ID=17981668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30849294A Expired - Fee Related JP2903081B2 (en) | 1994-12-13 | 1994-12-13 | Shaft passing method of shield construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2903081B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008019663A (en) * | 2006-07-14 | 2008-01-31 | Maeda Corp | Tunnel construction method |
| CN109826630B (en) * | 2019-02-02 | 2024-04-09 | 上海城建水务工程有限公司 | Precast concrete open caisson device for pipe jacking construction and construction method thereof |
-
1994
- 1994-12-13 JP JP30849294A patent/JP2903081B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08165896A (en) | 1996-06-25 |
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