JP3084500B2 - How to build underground space - Google Patents
How to build underground spaceInfo
- Publication number
- JP3084500B2 JP3084500B2 JP04260577A JP26057792A JP3084500B2 JP 3084500 B2 JP3084500 B2 JP 3084500B2 JP 04260577 A JP04260577 A JP 04260577A JP 26057792 A JP26057792 A JP 26057792A JP 3084500 B2 JP3084500 B2 JP 3084500B2
- Authority
- JP
- Japan
- Prior art keywords
- tunnel
- underground space
- constructed
- shaft
- tunnels
- 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
Description
【0001】[0001]
【産業上の利用分野】本発明は、地下空間の構築方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an underground space.
【0002】[0002]
【従来の技術】近年、地下の有効利用に伴い、都市部に
おける地下大空間の施工が頻繁に行われている。図4
は、従来の地下空間の施工方法を示す説明図である。従
来は、地下空間aを構築する場合、先ず立坑よりシ−ル
ドマシンを発進させ、間隔をおいて複数の先行トンネル
bを構築し、その周辺地盤を改良して地盤改良体cを造
成する。次に、先行トンネルb間に後行トンネルdを構
築して、同じ様に地盤改良体eを造成する。そして、先
行後行トンネルb、dにより包囲される内部地盤を掘削
し、吹付コンクリ−トf、覆工コンクリ−トgを施工し
て地下空間aを構築する。2. Description of the Related Art In recent years, large underground spaces in urban areas have been frequently constructed with the effective use of underground spaces. FIG.
FIG. 2 is an explanatory view showing a conventional method of constructing an underground space. Conventionally, when constructing an underground space a, first, a shield machine is started from a shaft, a plurality of preceding tunnels b are constructed at intervals, and the surrounding ground is improved to construct a ground improvement body c. Next, the following tunnel d is constructed between the preceding tunnel b and the ground improvement body e is similarly constructed. Then, the inner ground surrounded by the preceding and following trailing tunnels b and d is excavated, and a spraying concrete f and a lining concrete g are constructed to construct an underground space a.
【0003】[0003]
【発明が解決しようとする課題】上記の従来技術には、
次のような問題点が存在する。 <イ>地下空間aの強度は、主に先行後行トンネルb、
dにより確保される。しかし、大空間となった場合等に
は、ア−チアクションがききにくく、強度面における信
頼性が低下する。SUMMARY OF THE INVENTION The above prior arts include:
The following problems exist. <B> The strength of the underground space a is mainly
d. However, in the case of a large space or the like, the arc action is difficult to be performed, and the reliability in terms of strength decreases.
【0004】<ロ>上記のように強度的な問題から、内
部掘削の際には、分割施工せざるを得ず、施工能率の低
下とコストアップの原因となる。<B> Due to the problem of strength as described above, in the case of internal excavation, it is inevitable to carry out divisional construction, which causes a decrease in construction efficiency and an increase in cost.
【0005】<ハ>大断面の地下空間の場合は、シ−ル
ドマシンの発進口及び到達口の寸法も大きくなるため、
発進立坑及び到達立坑の規模が大きくなり、用地の確保
が困難となる。<C> In the case of an underground space having a large cross section, the dimensions of the starting port and the reaching port of the shield machine become large.
The scales of the starting shaft and the reaching shaft become large, and it becomes difficult to secure land.
【0006】[0006]
【課題を解決するための手段】本発明は、上記のような
問題点を解決するためになされたもので、強度の信頼性
の向上、施工能率の向上及びコストの削減を図ることが
できる地下空間の構築方法を提供することを目的とす
る。即ち、本発明は、立坑からシ−ルドマシンを発進さ
せ、地下空間の掘削予定範囲の外周囲に、間隔をおいて
複数の先行トンネルを構築し、この先行トンネルの周囲
地盤を補強改良し、同様に立坑からシ−ルドマシンを発
進させ、先行トンネル間に後行トンネルを構築し、この
後行トンネルの周囲地盤を補強改良した後、先行あるい
は後行トンネル内からシ−ルドマシンを先行後行トンネ
ルの内側に沿ってル−プ状に発進させて、複数のル−プ
状トンネルを構築し、先行後行トンネル及びル−プ状ト
ンネルの内側を掘削して地下空間を構築する、地下空間
の構築方法である。また、前記先行及び後行トンネルの
構築は、発進立坑から複数のシ−ルドマシンを密集させ
た状態で発進させ、次第に間隔を広げて地下空間の掘削
予定範囲の外周囲を包囲した後、到達立坑に再び密集さ
せて到達させて行う、地下空間の構築方法である。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can improve the reliability of strength, the efficiency of construction, and reduce the cost. An object of the present invention is to provide a space construction method. That is, according to the present invention, a shield machine is started from a shaft, a plurality of leading tunnels are constructed at intervals around the underground space to be excavated, and the ground surrounding the leading tunnel is reinforced and improved. Then, a shield machine is started from the shaft, a trailing tunnel is constructed between the leading tunnels, and the ground around the trailing tunnel is reinforced and improved. Construction of an underground space, in which a plurality of loop tunnels are constructed by starting in a loop along the inside and excavating the inside of the preceding trailing tunnel and the loop tunnel to construct an underground space. Is the way. In the construction of the leading and trailing tunnels, a plurality of shield machines are started from the starting shaft in a dense state, and gradually widened to surround the outer periphery of the planned excavation area of the underground space, and then reach the reaching shaft. This is a method of constructing an underground space that is made to reach again and reach a high density.
【0007】[0007]
【実施例】以下、図面を参照しながら、本発明の一実施
例について説明する。 <イ>先行トンネルの構築(図1) 先行トンネル1は、図1に示すように、シ−ルドマシン
を発進立坑2から発進させ、図示しない到達立坑に到達
させて構築する。ここで、発進立坑2及び到達立坑は、
シ−ルドマシンを密集させて発進、到達させるため、小
規模のものでよい。先ず、発進立坑2から複数のシ−ル
ドマシンを環状に密集させて発進させる。次第にシ−ル
ドマシン間の間隔を広げて行き、地下空間6の掘削予定
範囲の外周囲を包囲する。なお本実施例では、ド−ム状
の地下空間を構築する場合を例に挙げて説明する。 そ
の後、シ−ルドマシンを到達立坑に再び密集させて到達
させ、先行トンネル1の構築を終了する。また、先行ト
ンネル1に先行してあるいは同時に、地下空間6の底部
中央等に位置する様に、作業用トンネル11を構築す
る。この作業用トンネル11は、ル−プ状トンネル5の
構築用のシ−ルドマシンを内部から発進できる径を確保
する。そして、上記先行トンネル1及び作業トンネル1
1の構築後、これらの周囲地盤の補強改良を行い、地盤
改良体3を造成する。地盤改良の方法としては、先行ト
ンネル1等の内部より改良する方法や、掘進しながら周
囲の地盤を攪拌して造成する方法等の種々の方法が採用
できる。An embodiment of the present invention will be described below with reference to the drawings. <A> Construction of the preceding tunnel (FIG. 1) As shown in FIG. 1, the preceding tunnel 1 is constructed by starting the shield machine from the starting shaft 2 and reaching the reaching shaft (not shown). Here, the starting shaft 2 and the reaching shaft,
A small-scale machine is sufficient for starting and reaching the shield machines in a dense manner. First, a plurality of shield machines are densely formed in a ring shape from the starting shaft 2 and started. The distance between the shield machines is gradually widened to surround the underground space 6 outside the planned excavation area. In this embodiment, a case where a dome-shaped underground space is constructed will be described as an example. Thereafter, the shield machines are again brought close to the arrival shaft to reach the arrival shaft, and the construction of the preceding tunnel 1 is completed. Further, the working tunnel 11 is constructed so as to be located at the bottom center or the like of the underground space 6 before or simultaneously with the preceding tunnel 1. The working tunnel 11 has a diameter enough to start a shield machine for constructing the loop-shaped tunnel 5 from the inside. Then, the preceding tunnel 1 and the working tunnel 1
After the construction of 1, the surrounding ground is reinforced and improved, and the ground improvement body 3 is formed. As a method of ground improvement, various methods such as a method of improving the inside of the preceding tunnel 1 or the like and a method of stirring and forming the surrounding ground while digging can be adopted.
【0008】<ロ>後行トンネルの構築(図1、2) 後行トンネル4は、図1に示すように、同様に発進立坑
2からシ−ルドマシンを発進させ、先行トンネル1間に
構築する。この場合、シ−ルドマシンは、密集する先行
トンネル1群の外側に近接させて発進立坑2から発進さ
せる。地盤改良体3を切削しながらシ−ルドマシンを掘
進させ、図2に示すように次第に間隔を広げると共に先
行トンネル1間に割り込ませる。そして、図1に示すよ
うに先行トンネル1と同一断面環状線内に位置させ、先
行トンネル1と共に地下空間6の掘削予定範囲の外周囲
を包囲する。その後、次第に間隔を狭めて到達立坑近傍
において再び密集させて到達させる。 後行トンネル4
の構築後は、先行トンネル1と同様に、周囲地盤の補強
改良を行い、地盤改良体31を造成する。これにより、
一体構造の環状覆工体が形成され、地下空間6の掘削予
定範囲の外周囲が包囲される。<B> Construction of the trailing tunnel (FIGS. 1 and 2) The trailing tunnel 4 is constructed between the leading tunnel 1 by similarly starting a shield machine from the starting shaft 2 as shown in FIG. . In this case, the shield machine is started from the starting shaft 2 in close proximity to the outside of the group of densely located preceding tunnels 1. The shield machine is excavated while cutting the ground improvement body 3 to gradually widen the gap as shown in FIG. Then, as shown in FIG. 1, it is positioned in the same annular line as the preceding tunnel 1 and surrounds the outer periphery of the planned excavation area of the underground space 6 together with the preceding tunnel 1. After that, the space is gradually narrowed, and the air is again densely brought near the arrival shaft to reach the arrival shaft. Subsequent tunnel 4
After the construction of (1), similar to the preceding tunnel 1, the surrounding ground is reinforced and improved to form the ground improvement body 31. This allows
An annular lining body having an integral structure is formed, and the outer periphery of the planned excavation area of the underground space 6 is surrounded.
【0009】<ハ>ル−プ状トンネルの構築(図1、
3) ル−プ状トンネル5は、図1、3に示すように、作業用
トンネル11内から、先行後行トンネル1、4の内側に
沿って、ル−プ状にシ−ルドマシン51を発進させて構
築する。このル−プ状トンネル5は、先行後行トンネル
1、4に対して肋骨状に間隔をおいて複数構築する。な
お、ル−プ状トンネル5間は密集させて構築しても良
い。このようにル−プ状トンネル5を構築することによ
って、環状覆工体を内側から支持し、補強することがで
きる。<C> Construction of a loop-shaped tunnel (FIG. 1,
3) As shown in FIGS. 1 and 3, the loop tunnel 5 starts the shield machine 51 in a loop shape from inside the working tunnel 11 along the inside of the preceding trailing tunnels 1 and 4. Let's build. The loop-shaped tunnel 5 is constructed with a plurality of ribs spaced apart from the preceding and following tunnels 1 and 4. The loop-shaped tunnel 5 may be constructed densely. By constructing the loop-shaped tunnel 5 in this way, the annular lining can be supported and reinforced from the inside.
【0010】<ニ>内部掘削及び内面処理(図1) ル−プ状トンネル5の構築完了後、先行後行トンネル
1、4及びル−プ状トンネル5の内側を掘削する。そし
て最後に、掘削空間の内面に、吹付コンクリ−ト61等
の内面処理を施して、地下空間6の構築を完了する。な
お、環状覆工体とル−プ状トンネル5との間に空隙が発
生している場合は、充填材を充填して空隙を埋めてお
く。<D> Internal Excavation and Inner Surface Treatment (FIG. 1) After the completion of the loop-shaped tunnel 5, the inside of the preceding trailing tunnels 1, 4 and the loop-shaped tunnel 5 are excavated. Finally, the inner surface of the excavation space is subjected to an inner surface treatment such as a spray concrete 61 to complete the construction of the underground space 6. When a gap is formed between the annular lining body and the loop-shaped tunnel 5, the gap is filled with a filler.
【0011】[0011]
【本発明の効果】本発明は以上説明したようになるた
め、次のような効果を得ることができる。 <イ>従来の先行後行トンネルの内側に、複数のル−プ
トンネルを構築して、肋骨状に地下空間を補強すること
ができる。そのため、地下空間の強度面における信頼性
を向上させることができる。Since the present invention has been described above, the following effects can be obtained. <B> A plurality of loop tunnels can be constructed inside the conventional preceding and trailing tunnels to reinforce the underground space in a rib shape. Therefore, the reliability in the strength aspect of the underground space can be improved.
【0012】<ロ>ル−プ状トンネルによる補強効果の
ため、地下空間を一挙に全断面掘削でき、施工能率の向
上及び施工コストの削減を図ることができる。<2> Due to the reinforcing effect of the loop-shaped tunnel, the underground space can be excavated in all sections at once, thereby improving construction efficiency and reducing construction costs.
【0013】<ハ>先行後行トンネルの構築は、シ−ル
ドマシンを密集した状態で発進立坑から発進させ、かつ
密集した状態で到達立坑に到達させる。そのため、大断
面の地下空間の構築の場合でも、発進口及び到達口が小
さくて済む。従って、発進立坑及び到達立坑の規模が大
きくならず、用地問題を解消できる。<C> In the construction of the preceding trailing tunnel, the shield machines are started from the starting shaft in a dense state and reach the reaching shaft in a dense state. Therefore, even in the case of constructing an underground space having a large cross section, the starting port and the reaching port can be small. Therefore, the scales of the starting shaft and the reaching shaft are not increased, and the land problem can be solved.
【0014】<ニ>シ−ルドマシンの台数を増やすこと
で、任意の断面寸法の地下空間を構築することができ
る。<D> By increasing the number of shield machines, an underground space having an arbitrary cross-sectional dimension can be constructed.
【0015】<ホ>他の利用分野としては、道路トンネ
ルの分岐、合流部等の断面変化部の施工にも適してい
る。<E> As another application field, the present invention is also suitable for the construction of a cross-section changing portion such as a branch or a junction of a road tunnel.
【図1】 本発明の施工全体の説明図FIG. 1 is an explanatory view of the entire construction of the present invention.
【図2】 先行後行トンネル施工の説明図[Fig. 2] Explanatory drawing of preceding and succeeding tunnel construction
【図3】 ル−プ状トンネル施工の説明図FIG. 3 is an explanatory view of loop-shaped tunnel construction.
【図4】 従来技術の説明図FIG. 4 is an explanatory view of a conventional technique.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI E21D 13/00 (58)調査した分野(Int.Cl.7,DB名) E21D 13/00 - 13/02 E21D 9/04 ──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 7 identification code FI E21D 13/00 (58) Investigated field (Int.Cl. 7 , DB name) E21D 13/00-13/02 E21D 9/04
Claims (2)
下空間の掘削予定範囲の外周囲に、間隔をおいて複数の
先行トンネルを構築し、この先行トンネルの周囲地盤を
補強改良し、 同様に立坑からシ−ルドマシンを発進させ、先行トンネ
ル間に後行トンネルを構築し、この後行トンネルの周囲
地盤を補強改良した後、 先行あるいは後行トンネル内からシ−ルドマシンを先行
後行トンネルの内側に沿ってル−プ状に発進させて、複
数のル−プ状トンネルを構築し、 先行後行トンネル及びル−プ状トンネルの内側を掘削し
て地下空間を構築する、 地下空間の構築方法。1. A shield machine is started from a shaft, and a plurality of leading tunnels are constructed at intervals around the underground space to be excavated, and the ground surrounding the leading tunnel is reinforced and improved. A shield machine is started from the shaft, a trailing tunnel is constructed between the leading tunnels, and the ground around the trailing tunnel is reinforced and improved. A plurality of loop-shaped tunnels are constructed by taking off in a loop along the road, and an underground space is constructed by excavating the inside of the preceding trailing tunnel and the loop-shaped tunnel. .
坑から複数のシ−ルドマシンを密集させた状態で発進さ
せ、次第に間隔を広げて地下空間の掘削予定範囲の外周
囲を包囲した後、到達立坑に再び密集させて到達させて
行う、請求項1記載の地下空間の構築方法。2. The preceding and following tunnels are constructed by starting a plurality of shield machines in a dense state from a starting shaft, gradually widening the interval, and surrounding the perimeter of the underground space to be excavated. The method for constructing an underground space according to claim 1, wherein the underground space is constructed so as to reach the reaching shaft again.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04260577A JP3084500B2 (en) | 1992-09-04 | 1992-09-04 | How to build underground space |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04260577A JP3084500B2 (en) | 1992-09-04 | 1992-09-04 | How to build underground space |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0681597A JPH0681597A (en) | 1994-03-22 |
JP3084500B2 true JP3084500B2 (en) | 2000-09-04 |
Family
ID=17349888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP04260577A Expired - Fee Related JP3084500B2 (en) | 1992-09-04 | 1992-09-04 | How to build underground space |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3084500B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007224532A (en) * | 2006-02-22 | 2007-09-06 | Taisei Corp | Construction method for underground structure |
JP2007332720A (en) * | 2006-06-19 | 2007-12-27 | Taisei Corp | Construction method for underground structure |
Families Citing this family (11)
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JP3366579B2 (en) * | 1998-10-19 | 2003-01-14 | 株式会社熊谷組 | How to install an invert in the bottom of an existing mountain tunnel |
JP4730595B2 (en) * | 2005-11-04 | 2011-07-20 | 清水建設株式会社 | Construction method of underground cavity |
JP4803429B2 (en) * | 2006-02-15 | 2011-10-26 | 清水建設株式会社 | Construction method of underground cavity |
JP4803428B2 (en) * | 2006-02-15 | 2011-10-26 | 清水建設株式会社 | Tunnel construction method |
JP4816327B2 (en) * | 2006-08-22 | 2011-11-16 | 株式会社大林組 | Widening part formation method of shield tunnel |
JP4793655B2 (en) * | 2007-05-07 | 2011-10-12 | 清水建設株式会社 | Tunnel construction method |
JP5308116B2 (en) * | 2008-10-08 | 2013-10-09 | 大成建設株式会社 | How to build a tunnel |
JP6268523B2 (en) * | 2014-02-10 | 2018-01-31 | 株式会社大林組 | Construction method of large section tunnel |
JP6268522B2 (en) * | 2014-02-10 | 2018-01-31 | 株式会社大林組 | Widening part formation method of shield tunnel |
JP6268521B2 (en) * | 2014-02-10 | 2018-01-31 | 株式会社大林組 | Widening part formation method of shield tunnel |
JP2018150767A (en) * | 2017-03-14 | 2018-09-27 | 鹿島建設株式会社 | Construction method of underground structure |
-
1992
- 1992-09-04 JP JP04260577A patent/JP3084500B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007224532A (en) * | 2006-02-22 | 2007-09-06 | Taisei Corp | Construction method for underground structure |
JP4566927B2 (en) * | 2006-02-22 | 2010-10-20 | 大成建設株式会社 | Construction method of underground structure |
JP2007332720A (en) * | 2006-06-19 | 2007-12-27 | Taisei Corp | Construction method for underground structure |
JP4641283B2 (en) * | 2006-06-19 | 2011-03-02 | 大成建設株式会社 | Construction method of underground structure |
Also Published As
Publication number | Publication date |
---|---|
JPH0681597A (en) | 1994-03-22 |
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