JPH06330693A - Assembling method of segment for rectangular shield of large section - Google Patents

Abstract

PURPOSE:To facilitate fitting of a large sized segment so as to improve execution efficiency in case of construction of a horizontal tunnel of large section by carrying a segment in the fitting conditiom into the tunnel, grasping it with erectors after horizontally suspending by means of hoists and the like, and fitting it without turning over it. CONSTITUTION:An upper side part segment piece 10 of rectangular section is carried in a tunnel by means of a carriage 3 in the condition of facing the finish surface 10a downward. Next it is horizontally suspended by hoists 5 and the like, grasped by erectors 2, lifted in the condition, and fitted by means of bolts and the like. It is not turned over in the tunnel. Hereby, a large sized and broad segment can be fitted, and execution efficiency can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a rectangular shield segment having a large cross section having a width of 7 m or more.

[0002]

2. Description of the Related Art A conventional rectangular cross-section shield has a tunnel width of about 5 m as shown in FIG.
The segment length of the piece is short. For this reason, the method of assembling the segment has been a method of assembling the segment carried by the trolley by rotating the segment in a predetermined direction with the erector. Therefore, the segment 1 on the upper side shown in FIG. 9 is carried by the carriage with the finished surface 1a thereof facing upward,
It is gripped by the erector 2 in this position,
It can be assembled by rotating it.

[0003]

Even in the case of a one-lane ramp on a road or the like, the tunnel has a lateral dimension of about 7 to 12 m, and construction of a large-section rectangular shield is required. In the construction of a large-section rectangular shield, if the number of segments is increased and the number of joints is increased, the rigidity of the rectangular shield is reduced and the deformation is increased. Therefore, it is effective to reduce the number of divisions of the segment and thus the number of joints. However, if the number of joints is limited to about 8 divisions as in the conventional case, the length of a segment of one piece becomes long. Therefore, as shown in FIG. In the method, the erector 2 cannot be gripped and rotated in the tunnel, and the assembly cannot be performed.

Therefore, an object of the present invention is to provide a method capable of reducing the number of joints of a rectangular shield segment having a large cross section with a large tunnel lateral dimension, while easily assembling a segment piece having a long upper side portion. That is.

[0005]

As a means for solving the above problems, in the method of assembling a rectangular shield segment having a large cross section according to the present invention, the segment piece 10 at the upper side of the large cross section rectangular shield has a finished surface. In the assembled position, the segment piece 10 is first hoisted horizontally by the hoist 5 or the like to a height at which the erector 2 can grip it. When the height is reached, the lower surface side of the segment piece 10 is gripped by the erector 2 to change the load, and then the erector 2 lifts the segment piece 1 to join the fitting joint to the upper side portion. It is characterized by performing.

According to the present invention, a total of two erectors 2 are installed side by side, and the segment piece 10 of the upper side portion is horizontally hung up to a predetermined height by a hoist 5 or the like.
On the lower surface side, the two erectors 2 and 2 jointly grip the two left and right places in a well-balanced manner to rebalance the load,
It is also characterized in that it is assembled on the upper side.

[0007]

The carriage 3 carries the segment piece 10 at the upper side with the finished surface 10a facing downward to the assembly position. The hoist 5 horizontally suspends the segment piece 10 to a height at which the segment piece 10 can be gripped by the erector 2. Erecta 2
When the segment piece 10 is gripped, it is not necessary to rotate the segment piece 10 and the assembly to the upper side portion can be performed by a linear operation as it is.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 7 sequentially show the steps of assembling a rectangular shield segment having a large cross section. First, as shown in FIG. 1, the corner segment piece 4 of the lower side portion is carried by the carriage 3 to the assembled position. Next, as shown in FIG. 2, a total of two erectors 2, 2 installed side by side in the assembling position side by side are operated respectively, and the finished surface 4a is attached to both left and right corners of the lower side of the rectangular shield. Assemble the corner segment pieces 4 facing inward. The arrangement of the two erectors 2 and 2 secures an open space 6 in the central portion of the rectangular shield cross section, and the open space 6 can accommodate equipment such as a power supply line, a hydraulic cable, and an earth discharging device. Have been considered to.

In FIG. 3, similarly to the above, the two erectors 2 are operated, and the finished surface 7a is arranged such that the lower side of the rectangular shield is housed between the left and right corner segment pieces 4.
Assemble the segment piece 7 of the lower side portion with the upward facing. Next, on the left and right corner segment pieces 4, the segment pieces 8 on both the left and right sides with the finished surface 8a facing inward are respectively assembled (see FIG. 4). Further, on the segment pieces 8 on both the left and right sides, a finished surface 9a is formed.
The corner segment pieces 9 on the left and right of the upper side with the inner side facing inward are respectively assembled, and the joints are respectively joined (FIG. 5).
reference).

Finally, the segment piece 10 on the upper side is carried in by the carriage 3 with the finished surface 10a facing downward (see FIG. 6). The segment piece 10 on the upper side
Is hoisted in a horizontal posture by two hoists 5 (or other hoisting devices of the same kind) provided on the ceiling part inside the shield mine, to a height at which it can be supported by the erector 2. Then, as shown in FIG. 7, the two left and right sides of the segment piece 10 are operated as a joint action of the two erectors 2.
The places are gripped in a well-balanced manner and the load with the hoist 5 is changed. Therefore, the erector 2 does not rotate the segment piece 10 but linearly moves in such a manner that the finished surface 10a is kept in a downward position between the left and right corner segment pieces 4 and 4 at the upper side of the rectangular shield. Assemble.

In the above-described embodiment, the method of holding and assembling the segment pieces by using the two erectors 2 and 2 has been described, but the invention is not limited to this. As shown in FIG. 8, it is also possible to hold and assemble the segment pieces by the single erector 2 installed in the central portion of the shield tunnel. Further, as a lifting means in place of the hoist 5 in FIG. 6, a method of lifting the segment pieces by a lifting device or the like equipped on the rear carriage can also be implemented.

[0012]

According to the method of assembling a rectangular shield segment having a large cross section according to the present invention, the segment piece 10 of the upper side portion having a long lateral dimension can be easily and quickly rotated without rotating within the rectangular shield cross section. Assembled. Further, by using the two erectors 2 and 2, it is possible to grasp the long segment piece 10 at two locations in a well-balanced manner, so that the bending moment generated can be reduced and the segment piece 10 is not damaged. Further, since equipment such as hydraulic cables can be stored in the open space 6 formed in the central portion of the rectangular shield cross section between the two erectors 2 and 2, it is not necessary to temporarily remove the equipment at the time of segment assembly, The large-section rectangular shield work can be done efficiently.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a rectangular shield showing a state where a corner segment piece is loaded.

FIG. 2 is a cross-sectional view of a rectangular shield showing a state where a corner segment piece of a lower side portion is assembled with two erectors.

FIG. 3 is a cross-sectional view of a rectangular shield showing a state in which a segment piece of a lower side portion is assembled with two erectors.

FIG. 4 is a cross-sectional view of a rectangular shield showing a state in which side pieces of segment pieces are assembled by two erectors.

FIG. 5 is a cross-sectional view of the rectangular shield showing a state in which the corner segment pieces on the upper side are assembled with two erectors.

FIG. 6 is a cross-sectional view of a rectangular shield showing a state in which a segment piece of an upper side portion is carried in.

FIG. 7 is a cross-sectional view of the rectangular shield showing a state in which the segment pieces of the upper side portion are assembled with two erectors.

FIG. 8 is a cross-sectional view of the rectangular shield showing a state in which the segment pieces of the upper side portion are assembled with one erector.

FIG. 9 is a cross-sectional view of a rectangular shield showing a segment assembled state of an erector according to a conventional method.

FIG. 10 is a cross-sectional view of a rectangular shield showing an assembled state of a horizontally long segment by a conventional method.

[Explanation of symbols]

 10 Segment piece 10a Finished surface 2 Electa 3 Truck 5 Hoist

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Hashiba 21-21 Ginza, Chuo-ku, Tokyo Stock company Takenaka Civil Engineering (72) Inventor Hiroyoshi Tagawa 8-21 Ginza, Chuo-ku, Tokyo Shares Company Takenaka Civil Engineering (72) Inventor Hiroshi Sakurai 8-21-1 Ginza, Chuo-ku, Tokyo Stock Company Takenaka Civil Engineering (72) Yoshifumi Fujii 8-21-1 Ginza, Chuo-ku, Tokyo Stock Company Takenaka Civil Engineering (72) Inventor Tadahiro Fukumoto 8-21, Ginza, Chuo-ku, Tokyo Stock company Takenaka Civil Engineering (72) Inventor Tetsuki Nagashima 1-1-1, Wadazaki-cho, Hyogo-ku, Kobe Sanbishi Heavy Industry Co., Ltd. Kobe Shipyard (72) Inventor Taishi Nanase 1-1-1, Wadazakicho, Hyogo-ku, Kobe Sanryo Heavy Industries Co., Ltd. Kobe Shipyard

Claims (2)

[Claims] 1. A method of assembling a rectangular shield segment having a large cross section with an erector, wherein the segment piece at the upper side of the rectangular shield is carried in with its finished surface facing downward, and in the assembled position, the segment piece is first Hoist it horizontally to a height where it can be grasped by an erector, and when it reaches the height, hold the bottom side of the segment piece with the erector for refilling, and then lift the segment piece with the erector. A method for assembling a rectangular shield segment having a large cross section, characterized in that a fitting joint is joined to an upper side portion. 2. A total of two erectors are arranged side by side, and the segment piece of the upper side portion is horizontally suspended by a hoist or the like to a predetermined height. The method for assembling a rectangular shield segment having a large cross section according to claim 1, characterized in that the segment is assembled on the upper side portion by gripping in a well-balanced manner and refilling.