JPH0765455B2 - Construction method for branch / joint of shield tunnel and temporary bulkhead construction device for branch / joint - Google Patents

Construction method for branch / joint of shield tunnel and temporary bulkhead construction device for branch / joint

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Publication number
JPH0765455B2
JPH0765455B2 JP1138368A JP13836889A JPH0765455B2 JP H0765455 B2 JPH0765455 B2 JP H0765455B2 JP 1138368 A JP1138368 A JP 1138368A JP 13836889 A JP13836889 A JP 13836889A JP H0765455 B2 JPH0765455 B2 JP H0765455B2
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JP
Japan
Prior art keywords
tunnel
shield
trailing
branch
construction
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
Application number
JP1138368A
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Japanese (ja)
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JPH035600A (en
Inventor
稔 中村
修二 倉木
宗男 吉村
寿夫 林
敏則 水谷
徹 渡辺
英人 真下
英樹 荻原
義雄 足立
俊夫 鈴木
Original Assignee
三井建設株式会社
佐藤工業株式会社
建設省土木研究所長
新日本製鐵株式会社
清水建設株式会社
石川島播磨重工業株式会社
西松建設株式会社
鹿島建設株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三井建設株式会社, 佐藤工業株式会社, 建設省土木研究所長, 新日本製鐵株式会社, 清水建設株式会社, 石川島播磨重工業株式会社, 西松建設株式会社, 鹿島建設株式会社 filed Critical 三井建設株式会社
Priority to JP1138368A priority Critical patent/JPH0765455B2/en
Publication of JPH035600A publication Critical patent/JPH035600A/en
Publication of JPH0765455B2 publication Critical patent/JPH0765455B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is applied to the construction of a junction / junction of an underground road interchange, a junction of an underground waterway, a junction of a subway, etc. by a shield construction method. The present invention relates to a method for constructing a branch / joint of a shield tunnel and a temporary partition construction device for the branch / joint used in the method.

[Problems to be Solved by Prior Art and Invention]

Conventionally, the branch / joint construction of shield tunnels has been performed by the so-called open cut method.

This type of construction method is to earth retaining according to the shape of the tunnel, excavating the inside of this earth retaining from the ground, and then backfilling the underground structure, and if it is shallow, it is an economical method. However, there was a problem that construction became difficult as the depth increased.

For this reason, when the underground structure is deep, it is carried out by combining the vertical shaft and the tunnel, but there is a problem that the vertical shaft becomes large and uneconomical construction is forced in the Intergenge where the tunnel gradually branches. is there.

There is also a method of using the NATM method in combination with ground improvement, but when the construction area becomes considerably deep, there was a problem that it could not be adopted if the ground was not very stable in terms of reliability.

Furthermore, there is also a method of constructing a branch / junction by constructing two tunnels at a branch / junction as close as possible, and then removing a part of the segment of the branch / junction. However, the ground is greatly exposed when a part of the segment is removed, and in order to make this exposed ground self-sustaining, it is necessary to carry out ground improvement such as large-scale freezing construction method and chemical injection method. There was a problem that the construction cost increased significantly.

The present invention has been made to solve the above problems, can reduce the construction range of ground improvement, does not require an auxiliary construction method, it is possible to improve workability, economic efficiency, and safety during construction. It is an object of the present invention to provide a method for constructing a branch / joint part of a shield tunnel and a temporary bulkhead construction device for a branch / joint part.

[Means for Solving the Problems]

According to a first aspect of the present invention, there is provided a method for constructing a branch / joint portion of a shield tunnel, wherein the leading tunnel is provided at a branch / joint portion between the leading tunnel and a trailing tunnel when a lining body of the leading tunnel is installed. And constructing a temporary bulkhead that separates the trailing tunnel from the trailing tunnel, and then digging the trailing tunnel from the diagonal direction toward the temporary bulkhead while installing the lining body of the trailing tunnel to install the leading tunnel. And a trailing tunnel at the temporary bulkhead, and then ground improvement of the ground around the junction / junction between the preceding tunnel and the trailing tunnel, and then removing the temporary bulkhead Join the leading tunnel and the trailing tunnel, and then
It is characterized in that columns or girders are installed at a branching / joining portion between the preceding tunnel and the following tunnel.

A temporary bulkhead construction device for branching / joining a shield tunnel according to claim 2 of the present invention is attached to a shield frame body of a shield machine for excavating a preceding tunnel, and turns in a circumferential direction of the shield tunnel. Swivel frame, a primary telescopic guide rod that is attached to the swivel frame and slides in the diametrical direction of the shield tunnel, and a tip of the primary telescopic guide rod that is attached via a support arm to the diameter of the shield tunnel. It is characterized by comprising a secondary telescopic guide rod that slides in a direction, and a suspension beam that is attached to a tip end portion of the secondary telescopic guide rod and holds a temporary partition wall.

In the method for constructing the branch / joint portion of the shield tunnel according to the third aspect of the present invention, the shield machine of the trailing tunnel can pass through a part of the circumference of the branch / joint portion of the preceding tunnel. The primary lining of the tunnel is performed by a segmented segmental segment having a recess and a temporary partition that separates the leading tunnel and the trailing tunnel, and then passes through the recess of the segment by the shield machine. To build a trailing tunnel, and then improve the ground around the branch / joint, and then remove the temporary bulkhead to join the leading tunnel and trailing tunnel. Next, columns or girders are installed at the branch / joint portions.

〔Example〕

A method for constructing a branching / joining portion of a shield tunnel according to claim 1 of the present invention will be described based on an embodiment illustrating the embodiment (see FIGS. 1 to 7).

First, while excavating the preceding tunnel A, the segments are assembled on the inner periphery of the preceding tunnel A to construct the lining body 1.

In this case, the temporary partition walls 2 are constructed by assembling flat plate-shaped segments at the junction between the leading tunnel A and the trailing tunnel B described later.

Further, a backfilling material 3 such as low-strength mortar or styrofoam is applied to the backside of the temporary partition 2, and the backfilling material 4 is poured outside the backfilling material 3.

Next, the trailing tunnel B is excavated obliquely toward the temporary partition wall 2, and the injection pipe and the freezing pipe 5 are inserted into the surrounding ground at the junction between the leading tunnel A and the trailing tunnel B to insert the surrounding pipe into the surrounding ground. To improve the ground.

Next, by removing the temporary bulkhead 2, the preceding tunnel A and the below-mentioned tunnel B are joined, and if necessary, the middle pillar 6 is built between the preceding tunnel A and the following tunnel B (fourth
(See the figure), or a column 6 or a girder 7 for reinforcing the lining 1 is installed between the leading tunnel A and the trailing tunnel B (see FIGS. 4 and 5).

6 and 7 show a temporary bulkhead construction device according to the second aspect of the present invention, and the temporary bulkhead 2 at the branch / joint portion of the shield tunnel is constructed by this device.

In the figure, the shield frame body 8 of the shield machine
In addition, a swivel frame 9 is mounted so as to swivel in the circumferential direction of the tunnel. The swivel frame 9 is swung freely by a swivel motor 10 attached to the shield frame body 8.

Two left and right support arms 11 are attached in parallel to the rear surface of the revolving frame 9, and a primary telescopic guide rod 12 and a primary telescopic jack 14 are attached to the left and right support arms 11, respectively. Telescopic jack 14
It is slidable in the diameter direction of the tunnel.

A support arm 13 is attached to the tip portion of the primary expansion / contraction guide rod 12, and the support arm 13 is attached to the segment assembling position in a protruding state and interferes with a segment already assembled when the temporary bulkhead 2 is assembled. It is configured in such a shape that it does not (see FIG. 6).

A secondary telescopic guide rod is attached to the tip of the left and right support arms 13.
15 and the secondary telescopic jack 17 are attached respectively, and the secondary telescopic guide rod 15 is slidable in the diameter direction of the tunnel by the secondary telescopic jack 17.

A temporary spacing wall 2 is provided at the lower end of the left and right secondary telescopic guide rods 15.
A suspension beam 16 for holding and assembling is suspended. The suspension beam 16 and the secondary expansion / contraction guide rod 15 do not interfere with the already assembled segments when the heating partition wall 2 is assembled.

Next, a method of constructing a branching / joining portion of a shield tunnel according to claim 3 of the present invention will be described based on an embodiment illustrated (see FIGS. 8 to 20).

FIG. 8 is a plan view showing a branching / joining section of a shield tunnel being constructed by this construction method, and FIGS. 9 and 10 are sectional views taken along line II-II and III-III in FIG.
In the branching / joining section of the preceding tunnel, a recess that allows the shield machine C of the following tunnel B to pass through part of the circumference
A segment 19 made of concrete or steel, which has an oval cross-section and has a temporary partition wall 31 for partitioning the leading tunnel A and the trailing tunnel B, is first covered, and the recess 18 is dug into the leading tunnel A. At the same time, the shield machine C for backfilling from the injection port provided in the segment 19 and for excavating the trailing tunnel B is provided with the backfilling portion 20 of the recess 18.
The tunnel B is constructed by digging so as to pass through.

FIG. 11 shows a case where the trailing tunnel B merges with the leading tunnel A, and then the shield tunneling machine C continues to dig the trailing tunnel B, and the trailing tunnel B gradually separates from the leading tunnel A. The construction method is also applied in this case.

FIG. 12 shows a segment 19 used in the branching / joining section of the shield tunnel, and a recess 18 is formed in the joining portion of the trailing tunnel B.

Reference numeral 21 is a bolt hole for passing a bolt (not shown) for joining the segments.

FIG. 13 shows a segment 22 installed between the main body having a circular cross section in the preceding tunnel A and the branching / joining portion.
Shows the end plate of the segment 19 corresponding to the recess 18
23 are formed.

17 to 20 show the construction process of the preceding tunnel A,
The shield tunnel machine D for excavating the preceding tunnel A is used to excavate the preceding tunnel A, and at the same time, the known tunnel 24 is used in the erector portion (rear part) of this shield excavator D to construct a single-circle section tunnel. Line the inner circumference of A (see Fig. 17).

In the figure, reference numeral 25 is a shield jack for advancing the shield machine D, and 26 is a shield machine D.
A tail seal that closes the gap between the assembled segment 24 and 27 is a skin plate that forms the outer periphery of the shield machine D.

When the shield machine D arrives at the tunnel branching / joining start point, the segment 22 shown in FIG. 13 is assembled, and at the same time, the shield plate machine D and the tail seal 29 are provided to partition the ground of the recess 18 and the inside of the tunnel. And are newly installed (see Figures 14 and 15).

Further, a shield jack 30 for advancing the shield machine D is newly installed as needed (Figs. 14 and 15).
(See Figure and Figure 18).

In this case, the ground of the recess 18 is temporarily exposed,
If necessary, ground protection work will be carried out on the 18 recesses.

Next, the preceding tunnel A is excavated by the shield machine D having the end plate 28 and the tail seal 29 installed as described above, and at the same time, the segment 19 shown in FIG. 12 is assembled and the inner circumference of the preceding tunnel A is lined. (See Figure 18).

In this case, the space of the concave portion 18 is backfilled by injecting excavated soil or soil cement from an injection port previously provided in the segment 19 (see FIG. 19).

In this way, when the excavation of the branching / joining section of the shield tunnel is completed, the shield machine D is returned to the state before remodeling in the process reverse to that of FIG. Line the tunnel cross section back to a single circle by lining it with the same segment 22 as shown.

Hereinafter, the same steps as those shown in FIG. 17 are repeated to excavate the preceding tunnel A.

When the construction of the branching / joining section of the preceding tunnel A is completed as described above, the shield tunneling machine C of the following tunnel B excavates the following tunnel B so as to pass through the backfilled portion 20 of the recess 18.

When the preceding tunnel A and the following tunnel B merge, the 16th
As shown in the figure, the partition wall 31 between the leading tunnel A and the trailing tunnel B is removed, the tunnel junction is constructed, and the structure of the branch / junction section of the tunnel is constructed.

In the embodiment, the case where the leading tunnel A and the trailing tunnel B are joined left and right has been described, but a case where they are joined up and down can be constructed by the same method (see FIG. 21).

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

Since a temporary partition is provided on the side of the lining body of the leading shield and the trailing tunnel is made to coincide with this temporary partition, the two tunnels can be easily connected by removing the temporary partition. In addition, in this case, the device of the present invention has the effect that the temporary partition wall can be assembled separately from the segment for assembling the lining body, so that the construction is easy.

At the branching / joining part of the shield tunnel, the primary lining of the tunnel is performed by the segment with the next circular cross-section that has a concave part in the part of the circumference in the branching / joining section of the preceding tunnel, and then the trailing part of the same segment It is an attempt to construct a trailing tunnel by excavating in a state where the tunnel shield machine is merged.The trailing tunnel is joined in the state of being fitted to the leading tunnel. The construction range for ground improvement is small,
The exposed part is reduced, the construction cost is significantly reduced, and
When the branching / joining section is constructed, the exposed portion of the natural ground is reduced, so that there is an effect that safety during construction is improved.

Further, since columns or girders for reinforcing the lining body are installed at the branching / joining portion, the strength is extremely stable.

Furthermore, auxiliary construction methods such as the roof shield construction method, the pipe roof construction method, and the kanzashi girder press-fitting construction method are not required, so that the construction cost is reduced and the construction period is shortened.

[Brief description of drawings]

1 to 5 are sectional views of a tunnel showing construction steps of a method for constructing a branch / joint portion of a shield tunnel according to claim 1 of the present invention, and FIGS. 6 and 7 are the construction steps. A side view and a front view of the temporary bulkhead construction device used in the method, FIG. 8 is a plan view showing the construction situation of the branch / joint portion of the shield tunnel, and FIGS. 9 and 10 are respectively I in FIG.
-I line, II-II line sectional view, 11th is a plan view showing the construction situation of the branch / joint of the shield tunnel, and Figures 12 and 13 are the segments used for the branch / joint of the shield tunnel, respectively. FIG. 14 is a partial cross-sectional plan view of the shield machine, FIG. 15 is a sectional view taken along the line III-III in FIG. 14, and FIG. 16 is the claim 3 according to the present invention. Vertical cross-sectional view of the shield tunnel branch / joint constructed by the construction method, Figures 17 to 20 are vertical cross-sectional views showing the construction process of the preceding tunnel, and Figure 21 is the joining of the preceding and succeeding tunnels vertically. Side view of the tunnel branch showing the broken state,
Figures 22, 23 and 24 show IV-IV in Figure 21.
FIG. 6 is a sectional view taken along the line V-V and the line VI-VI. A ... Leading tunnel, B ... Trailing tunnel, C, D ...
Shield machine, 1 ... Lining body, 2 ... Temporary bulkhead, 3,
4 ... backfill material, 5 ... injection tube and freezing tube, 6 ... pillar,
7 ... girder beam, 8 ... shield frame body, 9 ... swivel frame, 10 ... swivel motor, 11 ... support arm, 12
…… Primary telescopic guide rod, 13 …… Support arm, 14 ……
Primary telescopic jack, 15 ... Secondary telescopic guide rod, 16 ...
… Suspended beam, 17 …… Secondary telescopic jack, 18 …… Recessed part, 19
…… Segment, 20 …… Backfill part, 21 …… Bolt hole, 22 …… Segment, 23 …… Tube, 24 …… Segment, 25 …… Shield jack, 26 …… Tail seal, 27
...... Skin plate, 28 ...... Wife plate, 29 ...... Tail seal, 30 …… Shield jack, 31 …… Temporary bulkhead.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 999999999 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Corporation (71) Applicant 999999999 2-6, Otemachi, Chiyoda-ku, Tokyo No. 3 (71) Applicant 999999999 Nishimatsu Construction Co., Ltd. 1-20-10 Toranomon, Minato-ku, Tokyo (71) Applicant 999999999 Mitsui Construction Co., Ltd. 3-10-1 Iwamoto-cho, Chiyoda-ku, Tokyo (72) Inventor Yoshio Adachi 1 Asahi, Tsukuba City, Ibaraki Prefectural Institute of Civil Engineering, Ministry of Construction (72) Inventor Toshinori Mizutani 1st Asahi, Tsukuba City, Ibaraki Prefecture Institute of Civil Engineering, Ministry of Construction (72) Hideto Mashita 1 Asahi, Tsukuba, Ibaraki Prefecture Address Ministry of Construction, Civil Engineering Research Institute (72) Inventor Toshio Suzuki 2-2-1 Otemachi, Chiyoda-ku, Tokyo Ishi Kawashima Harima Heavy Industries Co., Ltd. (72) Akito Yoshimura Muneo Moto-Akasaka 1-2-7, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Shuji Kuraki 4-12-20 Nihonbashihonmachi, Chuo-ku, Tokyo Sato Kogyo Co., Ltd. (72) Invention Author Hideki Ogihara 2-16-1, Kyobashi, Chuo-ku, Tokyo Within Kiyoto Construction Co., Ltd. (72) Inventor Minoru Nakamura 2-3-6 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (72) Inventor Toru Watanabe 1-20-10 Toranomon, Minato-ku, Tokyo Nishimatsu Construction Co., Ltd. (72) Inventor Toshio Hayashi 3-10-1 Iwamotocho, Chiyoda-ku, Tokyo Mitsui Construction Co., Ltd. (56) Reference References JP-A-1-192995 (JP, A) JP-A-64-66394 (JP, A)

Claims (3)

[Claims]
1. A method of constructing a branch / joint portion of a shield tunnel comprising a preceding tunnel and a trailing tunnel constructed after the preceding tunnel is constructed, wherein the preceding tunnel is used when a lining body of the preceding tunnel is installed. And a temporary partition for partitioning the leading tunnel and the trailing tunnel at the branching / joining portion of the trailing tunnel and
While excavating the trailing tunnel from the oblique direction toward the temporary partition wall, the covering body of the trailing tunnel is installed to match the preceding tunnel and the trailing tunnel at the temporary partition wall portion, and then, Ground improvement of the ground around the branch / joint is performed, then the temporary bulkhead is removed to join the leading tunnel and the trailing tunnel, and then a pillar or girder is added to the branch / joint. A method of constructing a branch / joint part of a shield tunnel, which is characterized by installing
2. A temporary installation installed at a branch / junction of a shield tunnel composed of a leading tunnel and a trailing tunnel constructed after the leading tunnel is constructed so as to partition the leading tunnel and the trailing tunnel. In a temporary bulkhead construction device for branching / joining for constructing a bulkhead, a swivel frame which is attached to a shield frame body of a shield machine for excavating the preceding tunnel and swivels in the circumferential direction of the shield tunnel, and this swivel A primary telescopic guide rod that is attached to a frame and slides in the diametrical direction of the shield tunnel, and a secondary telescopic guide that is attached to the tip end of the primary telescopic guide rod via a support arm and that slides in the diametrical direction of the shield tunnel. The expansion guide rod and the secondary expansion guide rod are attached to the tip end of the temporary expansion partition. Temporary partition wall construction system of branching and joining portion of the shield tunnel, characterized by comprising a hanger beam lifting.
3. A method of constructing a branch / junction of a shield tunnel comprising a preceding tunnel and a trailing tunnel constructed after the construction of the preceding tunnel, wherein the branch / join of the preceding tunnel has a circumference of one. The primary lining of the tunnel is performed by a segmented segmental segment having a concave portion through which the shield machine of the trailing tunnel can pass, and a temporary partition wall separating the leading tunnel and the trailing tunnel, Next, the shield tunneling machine excavates so as to pass through the recessed portion of the segment to construct a trailing tunnel, and then the ground around the branch / joint is improved, and then the temporary partition wall. Is removed to join the leading tunnel and the trailing tunnel, and then a pillar or girder beam is installed at the branching / joining portion to construct the branching / jointing portion of the shield tunnel. Law.
JP1138368A 1989-05-31 1989-05-31 Construction method for branch / joint of shield tunnel and temporary bulkhead construction device for branch / joint Expired - Lifetime JPH0765455B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1138368A JPH0765455B2 (en) 1989-05-31 1989-05-31 Construction method for branch / joint of shield tunnel and temporary bulkhead construction device for branch / joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1138368A JPH0765455B2 (en) 1989-05-31 1989-05-31 Construction method for branch / joint of shield tunnel and temporary bulkhead construction device for branch / joint

Publications (2)

Publication Number Publication Date
JPH035600A JPH035600A (en) 1991-01-11
JPH0765455B2 true JPH0765455B2 (en) 1995-07-19

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JP4593913B2 (en) * 2003-12-26 2010-12-08 株式会社間組 How to build a branch tunnel
JP4485373B2 (en) * 2005-01-24 2010-06-23 大成建設株式会社 Construction method of tunnel junction
JP4534069B2 (en) * 2005-07-08 2010-09-01 ジャパントンネルシステムズ株式会社 Parallel tunnel joining method
JP4587919B2 (en) * 2005-09-13 2010-11-24 日立造船株式会社 How to construct a junction and junction of shield tunnel
JP4587918B2 (en) * 2005-09-13 2010-11-24 日立造船株式会社 How to construct a junction and junction of shield tunnel
JP4634308B2 (en) * 2006-01-18 2011-02-23 大成建設株式会社 Segment box or propulsion box and air mortar block composite, and construction method for multiple section tunnel
JP4730608B2 (en) * 2006-06-05 2011-07-20 清水建設株式会社 segment
JP4934416B2 (en) * 2006-06-09 2012-05-16 前田建設工業株式会社 How to construct a junction and junction of shield tunnel
JP2008019663A (en) * 2006-07-14 2008-01-31 Hazama Corp Tunnel construction method
JP4598746B2 (en) * 2006-12-11 2010-12-15 新日本製鐵株式会社 Tunnel structure and construction method at branch and junction
JP4824653B2 (en) * 2007-09-04 2011-11-30 鹿島建設株式会社 Tunnel junction and method of constructing tunnel junction
CN104395555B (en) 2012-07-09 2016-03-16 株式会社小松制作所 Tunnelling servicing unit
JP5513559B2 (en) 2012-07-09 2014-06-04 株式会社小松製作所 Tunnel excavation method
JP6101171B2 (en) * 2013-08-06 2017-03-22 大成建設株式会社 Shield tunnel joining segment, joining structure and joining method

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