JP4184400B2 - Construction method of underground structure - Google Patents

Construction method of underground structure Download PDF

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JP4184400B2
JP4184400B2 JP2006275093A JP2006275093A JP4184400B2 JP 4184400 B2 JP4184400 B2 JP 4184400B2 JP 2006275093 A JP2006275093 A JP 2006275093A JP 2006275093 A JP2006275093 A JP 2006275093A JP 4184400 B2 JP4184400 B2 JP 4184400B2
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box
underground
lining
board
construction
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JP2008095293A (en
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誠 植村
廣明 竹川
賢治郎 植村
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誠 植村
賢治郎 植村
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本発明は、道路下に構築するトンネルなどの地下構造物の構築方法に関するものである。   The present invention relates to a method for constructing an underground structure such as a tunnel constructed under a road.
道路下などに複数のコンクリート函体を縦列に埋設してトンネルなどの地下構造物を構築する方法として、例えば、開削工法やトンネル工法があり、開削工法は地上から掘削機で函体埋設用の溝を掘削しながら、この掘削溝内に地上からコンクリート函体を吊下げて順次埋設していく。   As a method of constructing underground structures such as tunnels by burying a plurality of concrete boxes under a road, etc., there are, for example, an excavation method and a tunnel method. While excavating the ditch, the concrete box is suspended from the ground and buried in the excavation ditch.
一方、シールド工法は、シールド機で地中を掘削し、立坑からコンクリート函体を吊下げ、掘削溝内に順次埋設していく。   On the other hand, the shield method excavates the ground with a shield machine, suspends a concrete box from a vertical shaft, and embeds it sequentially in the excavation trench.
前記従来技術は、当業者間で一般的に行われているものであり、文献公知発明にかかるものではない。   The prior art is generally performed by those skilled in the art, and is not related to a known literature invention.
前記開削工法は、コストはかからないが、開削であるため上部交通の制限が大きくなる不都合がある。   The excavation method is not costly, but has an inconvenience that the upper traffic is greatly restricted because of the excavation.
これに対して、シールド工法は、地上に開口する部分は立坑の出入口のみであるから、上部交通の制限はほとんどないが、コストがかかる。   On the other hand, since the shield method is only the entrance to the shaft, the part that opens to the ground is almost free from upper traffic, but it is expensive.
本発明は前記従来例の不都合を解消するものとして、開削工法とシールド工法を組み合わせ、開削工法に比較して上部交通制限を少なくでき、また、シールド工法に比較して開削工法を併用するため経済的なものとすることができ、さらに土被り0で施工できて施工性も向上できる地下構造物の構築方法を提供するものである。   The present invention eliminates the inconvenience of the conventional example, and combines the open-cut method and the shield method, so that the upper traffic restriction can be reduced compared to the open-cut method, and the open-cut method is used in combination with the shield method. Further, the present invention provides a method for constructing an underground structure that can be constructed with zero soil covering and can improve the workability.
請求項1記載の発明は、地下に複数の函体を縦列に連続させて埋設する地下構造物の構築方法において、構築場所の一方の端から覆工板を設置して他方の端に向けて推進するとともに、他方の端から開渠函体の函体下部を覆工板の下方に推進し、次に、覆工板を引戻しながら函体下部の上に函体上床板を所定位置まで推進させて設置することを要旨とするものである。   The invention according to claim 1 is a construction method of an underground structure in which a plurality of boxes are continuously buried in a column in the basement, and a lining plate is installed from one end of the construction place toward the other end. While propelling, push the lower part of the unfolded box from the other end to the lower side of the lining board, and then push the box upper floor board to the specified position on the lower part of the box while pulling back the lining board. The gist is to let it be installed.
請求項1記載の本発明によれば、覆工板を設置して上部交通を確保したうえで、覆工板の下方をオープンシールド工法で掘削してここに開渠函体の函体下部を推進させ、その後、覆工板を引戻しながら覆工板と入れ替りに函体下部の上に函体上床板をスライドさせながら設置するようにしたから、車両は覆工板に替えて函体上床板の上を交通できる。   According to the first aspect of the present invention, after the lining plate is installed to secure the upper traffic, the lower portion of the lining plate is excavated by the open shield method and the lower portion of the open box is formed here. After that, it was installed by sliding the box upper floor board on the lower part of the box in place of the lining board while pulling back the lining board. You can traffic on the top.
よって、交通制限を最小限に抑えることができ、また、土被りも0にでき、施工性が向上する。   Therefore, the traffic restriction can be minimized, and the earth covering can be reduced to 0, thereby improving the workability.
請求項2記載の発明は、函体下部の推進は覆工板の下方に配設した掘削機で覆工板下方を掘削して函体下部の推進スペースを確保して行うことを要旨とするものである。   The gist of the invention described in claim 2 is that the lower part of the box is propelled by excavating the lower part of the lining plate with an excavator disposed below the lining board to secure a propulsion space below the box. Is.
請求項2記載の本発明によれば、函体下部を推進させるためのスペースは、覆工板の下方の地中に配設した掘削機で掘削して確保されるから、地上に掘削機を配置しての開削工法で掘削溝を掘削せずにすみ、上部交通の制限を少なくできる。   According to the second aspect of the present invention, the space for propelling the lower part of the box is secured by excavating with an excavator disposed in the ground below the lining plate. It is possible to reduce the restriction of upper traffic without digging the excavation groove by the open-cut method.
以上述べたように本発明の地下構造物の構築方法は、施工場所に覆工板をスライドさせながら設置し、その下方に開渠函体の函体下部を設置した後、覆工板をスライドさせて撤去しながら、これと入れ替えに函体上床板をスライドさせながら函体下部の上に設置するから、覆工板および函体上床板と、車両が交通できる場所を常時確保でき、最小限の交通制限で函体を敷設できる。   As described above, the construction method of the underground structure of the present invention is to install the lining plate while sliding the lining plate at the construction site, and after installing the lower part of the open box body below it, slide the lining plate. It is installed on the lower part of the box while sliding the box upper floor board to replace it while removing it. Boxes can be laid with traffic restrictions.
また、土被りも0にでき、施工性が向上する。   Moreover, the earth covering can be reduced to 0, and the workability is improved.
以下、図面について本発明の実施形態を詳細に説明する。図1は本発明の地下構造物の構築方法の実施形態を示す第1工程の側面図、図2は同上正面図で、本発明は車両交通のある道路23の下方に、開渠型のコンクリート函体によりトンネルなどの地下構造物を構築するため方法である。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a first step showing an embodiment of a construction method of an underground structure according to the present invention, FIG. 2 is a front view of the same, and the present invention is an open type concrete below a road 23 with vehicle traffic. This is a method for constructing underground structures such as tunnels using boxes.
第1工程として、図1、図2に示すように施工場所の地上の道路23をバックホー8などの掘削機で開削工法で掘削し、覆工板桁受(レール)1を設置する。図中2はPC板、3は砕石基礎、4はガイドプレートを示す。   As a first step, as shown in FIGS. 1 and 2, a ground road 23 at a construction site is excavated by an excavation method using an excavator such as a backhoe 8, and a lining plate girder (rail) 1 is installed. In the figure, 2 is a PC plate, 3 is a crushed stone foundation, and 4 is a guide plate.
また、9は資材などの搬入用のトラックであり、道路23は開削しない部分を車両11の走行路として確保しておく。10は走行車線を表示するコーンである。   Reference numeral 9 denotes a truck for carrying materials and the like, and a portion of the road 23 that is not excavated is secured as a travel path of the vehicle 11. Reference numeral 10 denotes a cone for displaying a traveling lane.
第2工程として、図3、図4に示すように覆工板受桁5と覆工板6とを上空制限のない部分で設置・組立てし、図3において右側の発進立坑側をバックホー8で掘削しながら、図3において左側の到達立坑側に支圧コンクリート16と覆工板推進ジャッキ13を設置する。図中12は掘削土を排出するためのダンプトラックを示す。   As a second step, as shown in FIG. 3 and FIG. 4, the lining plate receiving girder 5 and the lining plate 6 are installed / assembled at a portion where there is no upper limit, and in FIG. While excavating, the bearing concrete 16 and the lining board propulsion jack 13 are installed on the left side shaft side in FIG. In the figure, reference numeral 12 denotes a dump truck for discharging excavated soil.
そして、組立てられた覆工板受桁5と覆工板6とを覆工板桁受(レール)1にそって覆工板推進ジャッキ13で発進立坑の方向に押出し推進する。   Then, the assembled lining plate receiving girder 5 and lining plate 6 are pushed and pushed in the direction of the starting shaft by the lining plate propulsion jack 13 along the lining plate girder (rail) 1.
図中15は覆工板推進用ストラットを示し、覆工板推進ジャッキ13と支圧コンクリート16との間に適宜配設する。   In the figure, reference numeral 15 denotes a lining plate propulsion strut, which is appropriately disposed between the lining plate propulsion jack 13 and the bearing concrete 16.
この状態では覆工板6の上が車両11の走行路となる。   In this state, the top of the lining plate 6 is the travel path of the vehicle 11.
このように車両11の走行路を確保したうえで、第3工程として発進立坑を築造し、ここに元押しジャッキ19を配設し、発進立坑側からオープンシールド機20を到達立坑の方向に向けて推進し、オープンシールド機20内に配置したバックホー8などの掘削機で掘削を行い、覆工板6の下方を前進する。図中17は掘削土を排出するためのベルトコンベア、18は転倒式トロバケットを示す。   In this way, after securing the traveling path of the vehicle 11, a start shaft is constructed as the third step, a main push jack 19 is disposed here, and the open shield machine 20 is directed from the start shaft side toward the reaching shaft. The excavator such as the backhoe 8 disposed in the open shield machine 20 is excavated to advance below the lining plate 6. In the figure, 17 is a belt conveyor for discharging excavated soil, and 18 is an overturning type trobucket.
掘削された空間に発進立坑から開渠型のコンクリート函体の函体下部7aをクレーン14などで吊り降ろし、元押しジャッキ19で到達立坑の方向に押出し推進する。この間も車両11は覆工板6の上を走行する。   The box lower part 7a of the open type concrete box is suspended from the starting shaft in the excavated space by a crane 14 or the like, and pushed out by the main push jack 19 in the direction of the reaching shaft. During this time, the vehicle 11 travels on the lining plate 6.
函体下部7aの全てが到達立坑側まで推進された状態では、第4工程の図7に示すように覆工板受桁5および覆工板6は函体下部7aで支持されている。   In a state where all of the box lower part 7a is propelled to the reach shaft side, as shown in FIG. 7 of the fourth step, the lining plate receiving girder 5 and the lining board 6 are supported by the box lower part 7a.
この第4工程では、クレーン14で覆工板推進用ストラット15を撤去し、覆工板受桁5および覆工板6を覆工板推進ジャッキ13で到達立坑側に引戻し撤去しながら、同時に函体上床板7bを発進立坑側から、上床板推進ジャッキ21で推進し押出す。この状態で函体上床板7bは函体下部7aの上面をスライドして前進する。これにより、覆工板6を函体上床板7bと入れ替える。   In this fourth step, the lining plate propulsion struts 15 are removed by the crane 14, and the lining plate receiving girder 5 and the lining plate 6 are pulled back and removed to the reach shaft side by the lining plate propulsion jack 13, and at the same time, The upper floor board 7b is propelled from the start shaft side by the upper floor board propulsion jack 21 and pushed out. In this state, the box upper floor board 7b slides on the upper surface of the box lower part 7a and advances. Thereby, the lining board 6 is replaced with the box upper floor board 7b.
全ての覆工板6が函体上床板7bと入れ替り、函体上床板7bを所定位置に設置完了後、函体下部7aと函体上床板7bとを上下緊結用PC鋼棒22で緊結して地下構造物であるトンネルを構築する。   After all the lining boards 6 have been replaced with the box upper floor board 7b and the box upper floor board 7b has been installed at a predetermined position, the box lower part 7a and the box upper floor board 7b are fastened by the PC steel rods 22 for vertical fastening. And build a tunnel that is an underground structure.
図9、図10は第5工程を示し、前記のようにして覆工板6と入替えに函体下部7aの上に函体上床板7bを設置した地下構造物は、函体上床板7bの上面が道路23の表面と同一面に位置するから、土被り0の施工となり、施工性がよい。そして、車両11は函体上床板7bの上面を走行することになる。   FIG. 9 and FIG. 10 show the fifth step, and the underground structure in which the box upper floor board 7b is installed on the box lower part 7a in place of the lining board 6 as described above is the case of the box upper floor board 7b. Since the upper surface is located on the same plane as the surface of the road 23, the construction is performed with zero earth covering, and the workability is good. And the vehicle 11 will drive | work the upper surface of the box top floor board 7b.
本発明の地下構造物の構築方法の実施形態を示す第1工程の縦断側面図である。It is a vertical side view of the 1st process which shows embodiment of the construction method of the underground structure of the present invention. 本発明の地下構造物の構築方法の実施形態を示す第1工程の縦断正面図である。It is a vertical front view of the 1st process which shows embodiment of the construction method of the underground structure of this invention. 本発明の地下構造物の構築方法の実施形態を示す第2工程の縦断側面図である。It is a vertical side view of the 2nd process which shows embodiment of the construction method of the underground structure of this invention. 本発明の地下構造物の構築方法の実施形態を示す第2工程の縦断正面図である。It is a vertical front view of the 2nd process which shows embodiment of the construction method of the underground structure of this invention. 本発明の地下構造物の構築方法の実施形態を示す第3工程の縦断側面図である。It is a vertical side view of the 3rd process which shows embodiment of the construction method of the underground structure of this invention. 本発明の地下構造物の構築方法の実施形態を示す第3工程の縦断正面図である。It is a vertical front view of the 3rd process which shows embodiment of the construction method of the underground structure of this invention. 本発明の地下構造物の構築方法の実施形態を示す第4工程の縦断側面図である。It is a vertical side view of the 4th process which shows embodiment of the construction method of the underground structure of this invention. 本発明の地下構造物の構築方法の実施形態を示す第4工程の縦断正面図である。It is a vertical front view of the 4th process which shows embodiment of the construction method of the underground structure of this invention. 本発明の地下構造物の構築方法の実施形態を示す第5工程の縦断側面図である。It is a vertical side view of the 5th process which shows embodiment of the construction method of the underground structure of this invention. 本発明の地下構造物の構築方法の実施形態を示す第5工程の縦断正面図である。It is a vertical front view of the 5th process which shows embodiment of the construction method of the underground structure of this invention.
符号の説明Explanation of symbols
1 覆工板桁受 2 PC板
3 砕石基礎 4 ガイドプレート
5 覆工板受桁 6 覆工板
7a 函体下部 7b 函体上床板
8 バックホー 9 トラック
10 コーン 11 車両
12 ダンプトラック 13 覆工板推進ジャッキ
14 クレーン 15 覆工板推進用ストラット
16 支圧コンクリート 17 ベルトコンベア
18 転倒式トロバケット 19 元押しジャッキ
20 オープンシールド機 21 上床板推進ジャッキ
22 上下緊結用PC鋼棒 23 道路
DESCRIPTION OF SYMBOLS 1 Covering board girder 2 PC board 3 Crushed stone foundation 4 Guide plate 5 Covering board receiving girder 6 Covering board 7a Box lower part 7b Boxing upper floor board 8 Backhoe 9 Truck 10 Cone 11 Vehicle 12 Dump truck 13 Covering board propulsion Jack 14 Crane 15 Struts for lining board promotion 16 Concrete supported 17 Belt conveyor 18 Trolley bucket 19 Former push jack 20 Open shield machine 21 Upper floor board propulsion jack 22 PC steel bar for upper and lower binding 23 Road

Claims (2)

  1. 地下に複数の函体を縦列に連続させて埋設する地下構造物の構築方法において、構築場所の一方の端から覆工板を設置して他方の端に向けて推進するとともに、他方の端から開渠函体の函体下部を覆工板の下方に推進し、次に、覆工板を引戻しながら函体下部の上に函体上床板を所定位置まで推進させて設置することを特徴とする地下構造物の構築方法。   In the construction method of an underground structure in which multiple boxes are buried in series in the basement, a lining plate is installed from one end of the construction site and propelled toward the other end, and from the other end The lower part of the unfolded box is pushed below the lining board, and then the upper floor board is pushed to the predetermined position on the lower part of the box while the lining board is pulled back. To build underground structures.
  2. 函体下部の推進は覆工板の下方に配設した掘削機で覆工板下方を掘削して函体下部の推進スペースを確保して行う請求項1記載の地下構造物の構築方法。   2. The method for constructing an underground structure according to claim 1, wherein propulsion of the lower part of the box is performed by excavating the lower part of the lining plate with an excavator disposed below the lining board to secure a propulsion space below the box.
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