JPH0772480B2 - Assembly method of segment lining in upper and lower combined shield tunnel - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of assembling a segment lining in an upper and lower combined shield tunnel in which the lower part of the upper shield tunnel and the upper part of the lower shield tunnel are connected. is there.

[Conventional technology]

Conventionally, as a method of assembling a segment lining in a combined upper and lower shield tunnel, as disclosed in Japanese Patent Laid-Open No. 60-141993, a lower cutout circular upper shield machine equipped with an upper excavator and a lower excavator are provided. Combined with a lower shield machine with an upper notched circular shape equipped with a machine, an upper and lower combined type shield machine is configured, and a middle workbench is provided in the vertical middle in the shield tail of the upper and lower combined type shield machine. In the shield tail of the shield machine, assemble the segment lining of the lower tunnel, and erection the floor slab over the upper end of the assembled upper notched circular segment. It has been proposed to assemble the upper tunnel segment lining on the workbench.

[Problems to be solved by the invention]

However, in the case of the conventional segment lining assembly method, when the segment lining of the upper tunnel is assembled, the floor slab segment is already arranged on the middle workbench, so the middle workbench is used to It is not possible to assemble segment linings for tunnels.

Also, in the case of the conventional segment lining assembly method, since the middle workbench cannot be used for assembling the segment of the upper tunnel, the middle workbench is omitted and one ring of lower part is provided in the shield tail of the upper and lower combined shield machine. It is conceivable to sequentially assemble the tunnel segment and the upper tunnel segment from the bottom to the top. However, in this case, it takes a long time to assemble the segments per ring, and when assembling the segments on the upper part of the tunnel, the height from the lower part of the tunnel is considerably high, which is very dangerous.

It is possible to increase the number of workers in order to shorten the assembly work time of the segment per ring, but when working in the same cross section, the work space is narrow, so increase the number of workers who work at one time. However, work efficiency does not improve so much.

Also, in order to shorten the segment assembly time per ring, it is possible to assemble the segments at different locations at the same time. In this case, however, a large work scaffold is required, so the equipment cost is low. Since the work space becomes high and the work space becomes narrow due to the installation of the large work scaffold, the workability of assembling becomes poor.

[Object and Structure of Invention]

An object of the present invention is to provide a method of assembling a segment lining in an upper / lower combined shield tunnel that can advantageously solve the above-mentioned problems, and the gist of the present invention is to provide an upper / lower combined shield machine. A method of assembling a lower segment lining and an upper segment lining following tunnel excavation by
The lower half segment ring 1 for assembling the lower half segment ring 1 and the upper half segment ring 2 for assembling the upper half segment ring 2 at a position preceding by at least one ring in the tunnel longitudinal direction. This is a method of assembling a segment lining in an upper-lower composite shield tunnel, which is characterized by performing at least one ring in the tunnel longitudinal direction prior to assembling the upper half segment ring 2 at the same position in the longitudinal direction.

〔Example〕

 The present invention will now be described in detail with reference to the illustrated example.

Fig. 1 shows the relationship between the upper and lower combined shield machine and the segment lining, Fig. 2 shows the erector bearing state in the segment lining, and Fig. 3 shows the front view of the upper and lower combined shield machine. Then, the lower part of the upper tubular body 8 having the lower cut-out circular cross-section and the upper part of the lower tubular body 9 having the upper and lower cut-out circular cross-section are integrally combined to form an upper and lower composite tubular body 10.
A partition wall 11 is integrally provided in the front part of the inside of the inside 10, and a circular upper soil stopper cutter 12 is arranged concentrically with the upper cylindrical body 8 in the front portion of the partition wall 11, and a circular lower soil stopper cutter 13 is
The lower cylindrical body 9 is provided between the partition wall 11 and the upper soil retaining cutter 12.
Are arranged concentrically with each other, the lower portion of the upper soil stopper cutter 12 and the upper portion of the lower soil stopper cutter 13 overlap with each other, and the upper soil stopper cutter 12 and the lower soil stopper cutter 13 are provided with a soil intake slit 14. The earth retaining face plate 15 and a large number of bits 16 are provided.

A drive shaft 17 fixed to the center of the upper soil stopper cutter 12 is supported by a bearing 18 fixed to a partition wall 11, and a drive shaft 19 fixed to the center of the lower soil stopper cutter 13 is a partition wall 11.
A bearing shaft 20 fixed to the drive shaft 17 of the upper soil stopper cutter 12 is connected to an output shaft of an upper planetary gear reducer 21 fixed to the partition wall 11, and the upper planetary gear reducer 21
The rotating shaft of the motor 22 fixed to the casing is connected to the input shaft of the upper planetary gear reducer 21 via the gear transmission mechanism, and the drive shaft 19 of the lower soil stopper cutter 13 is fixed to the partition wall 11. The rotation shaft of the motor 24, which is connected to the output shaft of the lower planetary gear reducer 23 and is fixed to the casing of the lower planetary gear reducer 23, is connected to the input shaft of the lower planetary gear reducer 23 via the gear transmission mechanism. ing.

A large number of propulsion jacks 25 are provided around the inside of the upper and lower composite cylinders 10.
And an upper erector 26 having an erector driving motor 41 and an erector support ring 27 having a cutout portion at the lower part thereof are provided in the upper cylinder body 8, and the erector support ring 27 is an upper and lower composite cylinder body. The upper erector 26 is rotatably supported by a plurality of bearing rollers 42 which are supported by the support roller 42 provided around the inside of the erector support ring 27.

Inside the lower tubular body 9, a lower-stage erector 28 having a motor 43 for driving an erector is provided, and an erector support ring 44 having a cutout portion is provided at an upper portion thereof, and the erector support ring 44 is supported by the upper and lower composite tubular body 10. And a large number of bearing rollers provided around the inside of the erector support ring 44.
A lower erector 28 is rotatably supported by 45.

A lower pressure chamber 30 is provided between the partition wall 11 and the lower soil stopper cutter 13.
Is provided, the upper pressure chamber 29 between the partition wall 46 provided above the front portion of the lower soil stopper cutter 13 and the upper soil stopper cutter 12 disposed at the front portion of the partition wall 46, and A muddy water supply pipe and a mud discharge pipe (not shown) are connected to the pressure chambers 29 and 30, respectively.

In the case of excavating an upper and lower composite tunnel using the upper and lower composite shield machine 31 configured as described above, and assembling an upper and lower composite segment lining following the excavation, the upper and lower composite shield machine 5th in 31 shield tail
As shown in FIG. 9 to FIG. 9, a plurality of arc-shaped segments 32, 3
3,34,35 and unequal length V-shaped joint segment 5 having long arm 3 at the lower part and short arm 4 at the upper part and unequal having long arm 3 at the upper part and short arm 4 at the lower part Assembling the lower half segment ring 1 consisting of the long V-shaped joint segment 6 and at the upper part of the lower half segment ring 1,
Assembling the upper half segment ring 2 consisting of a plurality of arc-shaped segments 36, 37, 38, 39 and the key segment 40 in sequence,
Further, the tunnel middle-stage floor slab segment 7 is erected and fixed across the steps provided on the left and right joint segment segments 5 and 6. In this case, the lower half segment ring 1 is assembled by one ring in the tunnel longitudinal direction before the upper half segment ring 2 is assembled, that is, the upper half segment ring 2 is assembled from the lower half segment ring 1. Also, after delaying by one ring, and after assembling the lower half segment ring 1 at the forefront, the segment for tunnel middle deck over the joint segments 5 and 6 on both upper and lower sides of the lower half segment ring 1 7
Erected and fixed.

The segments forming the lower half segment ring 1 are sequentially assembled from the lower part to the upper part in the order of the arcuate segments 32 to 35 and the joining segment segments 5 and 6, and the segments forming the upper half segment ring 2 are assembled. , The arc-shaped segments 36 to 39 and the key segment 40 in this order from the bottom to the top, and immediately after the lower half segment ring 1 has been assembled, the lower half segment ring 1 has an upper joint segment. As shown in FIG. 1, the segment 7 for the middle deck of the tunnel is erected and fixed over 5 and 6.

Further, a joint segment 5 having the long arm 3 at the lower portion and the short arm 4 at the upper portion and a joint portion segment 6 having the long arm 3 at the upper portion and having the short arm 4 at the lower portion are alternately arranged in the tunnel longitudinal direction. The lower half segment ring 1 and the upper half segment ring 2 are arranged so that they are in mesh with each other, and, as shown in FIGS. 8 and 9, upper and lower composite segment rings that are adjacent in the tunnel longitudinal direction. The respective segments other than the joint segment segments 5 and 6 in FIG.

Adjacent segments are connected by a joint or the like having bolts, but since joints of the segments are known, detailed description thereof will be omitted.

Since the long arm 3 of the joint segment 6 in the lower half segment ring 1 and the segment 36 in the upper half segment ring 2 overlap each other in the longitudinal direction of the tunnel, before the lower half segment ring 1 is assembled, the segment 36 is provided as an existing segment ring. Preferably, it is linked to the segment in. In this case, the jack 25 for propulsion in the upper tubular body 8
And, as the jack for moving the upper-stage erector 26, one having a stroke larger by one ring than usual is used.

The joint segment 6 having the long arm 3 on the upper portion and the tunnel middle deck slab segment 7 can be assembled and installed by either the upper erector 26 or the lower erector 28.

In addition, as shown in FIG. 1 and FIG.
In the rear part of the lower erector 28, the lower half segment ring shape holding temporary frame 48 and the upper half segment ring shape holding temporary frame 49, which are equipped with hydraulic expansion and contraction struts 47 on the left and right sides respectively, and the lower half segment ring 1 and It is preferably located inside the upper half segment ring 2.

〔The invention's effect〕

According to the present invention, in the method of assembling the lower segment lining and the upper segment lining following the tunnel excavation by the upper and lower combined shield machine, the lower erector 28 for assembling the lower half segment ring 1 and the upper half segment ring 2 are assembled. It is used at a position that precedes the upper erector 26 for assembly by at least one ring in the tunnel longitudinal direction, and the assembly of the lower half segment ring 1 is performed more than that of the upper half segment ring 2 at the same position in the tunnel longitudinal direction. In the tunnel longitudinal direction, at least one ring precedes the lower half segment ring 1 and the upper half segment ring 2 at different positions in the tunnel longitudinal direction, that is, the lower half segment ring 1 and the lower half segment thereof. At least one ring behind the ring 1 in the longitudinal direction of the tunnel The segment ring 2 and the segment ring 2 can be assembled at the same time and without being influenced by each other. Therefore, the assembly work of the segment lining in the upper and lower combined shield tunnel can be performed efficiently and safely, and the segment assembly work position is the tunnel. Since the upper half segment ring 2 and the lower half segment ring 1 at the same position in the tunnel longitudinal direction are assembled at once at the different positions in the longitudinal direction, the assembling work is easy and The segment position adjustment work at the time of assembly is easy, and since the tunnel middle slab segment 7 is erected and fixed to the preceding lower half segment ring 1, the tunnel middle slab segment 7
Can be used as a work scaffold, and therefore, the effect that the work scaffold can be reduced can be obtained.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical cross-sectional side view showing the relationship between an upper and lower combined shield machine and a segment lining, and FIG. 2 shows an erector support state in the segment lining. Rear view, FIG. 3 is a front view of the upper and lower combined shield machine, FIG. 4 is a vertical sectional front view showing the relationship between the segment lining and the temporary frame for retaining the segment ring shape, and FIG. FIG. 6 is a left side view of the upper and lower composite type segment linings during assembly work, FIG. 7 is a right side view thereof, and FIG. 8 is C of FIG.
-C line sectional drawing, FIG. 9 is the DD sectional view taken on the line of FIG. In the figure, 1 is a lower half segment ring, 2 is an upper half segment ring, 3 is a long arm, 4 is a short arm, 5 and 6 are joint segments, 7 is a segment for a tunnel middle deck, and 10 is a segment.
Is an upper and lower composite cylinder body, 11 is a partition wall, 12 is an upper earth retaining cutter, 13
Is a lower earth retaining cutter, 21 is an upper planetary gear reducer, 22 is a motor, 23 is a lower planetary gear reducer, 24 is a motor, 25 is a propulsion jack, 26 is an upper erector, 27 is an erector support ring, and 28 is a lower stage. An erector, 29 is an upper pressure chamber, 30 is a lower pressure chamber, 31 is an upper and lower combined shield machine, 32 to 40 are segments, and 44 is an erector support ring.

Claims (1)

[Claims] 1. A method for assembling a lower segment lining and an upper segment lining following tunnel excavation by a combined upper and lower shield machine, wherein a lower erector 28 for assembling a lower half segment ring 1 is attached to an upper half segment ring 2.
Used at a position that precedes the upper erector 26 for assembling the at least one ring in the tunnel longitudinal direction,
The upper and lower composite shields are characterized in that the lower half segment ring 1 is assembled prior to the assembly of the upper half segment ring 2 at the same position in the tunnel longitudinal direction by at least one ring in the tunnel longitudinal direction. Assembly method for segment lining in tunnels.