JP2678048B2 - How to construct a lining ring for a shield tunnel - Google Patents

Description

The present invention relates to a method for constructing a lining ring of a vertical multiple shield tunnel by assembling segments into a shape in which a plurality of pseudo circular portions are vertically connected in multiple stages. .

[Conventional technology]

As shown in Fig. 18, the conventionally known multiple shield tunnel has a lining ring constructed by assembling segments (A, B, K) in a shape in which multiple rows of pseudo-circular parts are connected in the horizontal direction. In such a horizontal multiple shield tunnel, the inner bottom of the skin plate of the shield machine is used as a segment storage and work floor, and by independently operating the erectors 50, 50 'installed in parallel in the machine,
The assembly of the segments in each row could be performed.

It is said that the vertical multiple shield tunnel is advantageous in that the tunnel occupation width is smaller than that of the horizontal multiple shield tunnel, but no construction technology has been announced at this stage.

[Problems to be solved by the invention]

In a vertical multiple shield tunnel, for example, in the case of a double tunnel type, as shown in FIG. 17, an arc-shaped A segment that divides the upper and lower two stages of the pseudo-circular portion, and a B segment that serves as the floor plate of the upper stage and One lining ring is formed by the K ₁ and K ₂ segments of substantially V-shaped cross section joining the steps. The segments can be assembled using the upper and lower two-stage erectors installed at the rear of the shield machine corresponding to the pseudo-circular parts of each stage, but the B segment that is the floor plate of the upper stage is the segment assembly process. Since it is inserted at the end of the above, it is necessary to separately provide a temporary floor board serving as a segment storage space and a working floor during the segment assembly by the upper erector between the stages. Moreover, this temporary floor plate must be movable to a position where it does not interfere with the segment during segment assembly, and if such a movable temporary floor plate is to be provided inside the shield machine, the structure of the main body becomes complicated. However, there are restrictions in terms of space.

An object of the present invention is to solve the above-mentioned problems and to provide a method capable of safely and efficiently performing a segment assembling operation for constructing a lining ring of a vertical multiple shield tunnel.

[Means for solving the problem]

In order to achieve the above object, in the invention according to claim 1,
When constructing a lining ring for a vertical multiple shield tunnel by assembling segments into a shape in which multiple pseudo-circular sections are vertically connected, install it at the rear of the shield machine corresponding to the multiple pseudo-circular sections. It is characterized in that the segment is assembled by using the above-mentioned plurality of stages of erectors, and when the segment is assembled by the upper stage erector, the lower stage erector holds a temporary floor board to serve as a segment storage space and a work floor.

Further, in the invention according to claim 2, when the segment is assembled by the lower erector, the temporary floor board is held by the upper erector instead of the lower erector.

[Action]

The multiple stages of erectors equipped in the shield machine have the functions of hoisting and transporting the segment to a predetermined position by turning, expanding and contracting the arm, and moving the grip forward and backward. Therefore, if the lower floor erector holds the temporary floorboard and pushes it up to a predetermined position between the floors, this temporary floorboard can be used as a segment storage space and work floor for the upper level erector, and can be temporarily used during segment assembly by the upper level erector. The floor plate can be moved to a position where it does not interfere with the segment while being held by the lower erector.

Also, when segment assembly is performed by the lower erector that does not require a temporary floorboard, if the temporary floorboard is held by the upper erector, it is only necessary to exchange the temporary floorboard between the upper and lower erectors, and the temporary floorboard is separated. Eliminates the hassle of taking it out to a place or reloading it when using it.

〔Example〕

 Hereinafter, the illustrated embodiment will be described.

FIG. 2 is a vertical sectional view of a vertical double shield excavator used in the present embodiment, FIG. 3 is a left side view thereof, and FIG. 4 is an enlarged view of an erector part on the right side.

The cross section of the shield is similar to the segment assembly shape shown in FIG. 17, and is composed of two upper and lower pseudo-circular portions and an inverted arc-shaped joint portion. On the front surface of the shield main body 1, two rotary cutters 2, 2 'having the same center as the pseudo-circular portions of the respective sections of the shield cross section are arranged in the same plane. Are partially overlapped and are synchronously driven in opposite directions so that the cut spokes do not interfere with each other. A cutter drive motor 4, an earth-moving screw conveyor 5, a propulsion shield jack 6 and the like are installed in the machine separated from the face by the partition wall 3, and further, in the rear part of the shield body 1 for assembling two upper and lower stages. Erectors 7 and 8 are installed.

5 is a side view of the upper erector 7, FIG. 6 is a sectional view taken along line AA of FIG. 5, FIG. 7 is a sectional view taken along line BB of FIG. 5, and FIG. FIG.

As shown in these figures, the upper erector comprises a pair of arms 12, 12 'each having one end fixed to an axially symmetric position of the above-mentioned turning ring 10 on the same turning ring 10 driven by a turning motor 9. , Guide portions 13, 13 'of the arms 12, 12'
Is fixed by a pair of hoisting parts 14 and 14 'that are guided by the shield and can move in parallel to the shield axial direction and the arms 12 and 12', and the hoisting parts 14 and 14 'are perpendicular to the shield axial direction. Pushing jacks 15 and 15 'for expanding and contracting, and sliders 17 and 17' supported by respective hoisting portions 14 and 14 'via guide rods 16 and 16' and movable back and forth in the shield axial direction.
And the sliders 17, 1
7'and the slide jacks 19 and 19 'for moving the grips 18 and 18' coupled thereto back and forth, the segment steady rests 20 and 20 'arranged on the side surfaces of the lifting portions 14 and 14', and the lifting portion 14 , 14 ', segment steady rest 20, 20'
Equipped with a pair of left and right independent lifting devices 11 and 11 'consisting of steady rest jacks 21 and 21' for expanding and contracting, and between each pair of lifting devices 11 and 11 ' A space 22 for loading a segment is provided in each of the hoisting devices 11, 11 ′, and each lifting device 11, 11 ′ has a function of gripping, pushing, moving back and forth, and a steady rest so that either single operation or simultaneous operation can be selected. I am doing it.

9 is a side view of the lower erector 8, FIG. 10 is a sectional view taken along the line DD in FIG. 9, and FIG. 11 is a view taken in the direction of the arrow E in FIG.

As shown in these drawings, the lower-stage erector 8 has a pair of arms 24, 24 ', one end of which is fixed to an axially symmetrical position of the swivel ring 23 on a swivel ring 23 driven by a swivel motor 9'. And the guide portions 25, 25 'of the arms 24, 24'
The suspension beam 26 that is guided by the shield beam and is movable in the direction perpendicular to the shield axis direction, and the pressing jacks 27 and 2 that are fixed to the arms 24 and 24 ′ and that extend and retract the suspension beam 26.
7 ', a slider 29 supported by the suspension beam 26 via guide rods 28, 28', and movable back and forth in the shield axial direction,
A slide jack 31 fixed to the suspension beam 26 and for moving a slider 29 and a grip 30 coupled thereto back and forth, and a segment steady rest 3 arranged at both ends of the suspension beam 26.
2, 32 'and steady rest jacks 33, 33' which are fixed to the suspension beam 26 and expand and contract the segment steady rests 32, 32 '.
It is equipped with a single lifting device consisting of and, and this lifting device is provided with the functions of gripping, pushing, moving back and forth, and steadying the segment. , A pair of temporary floor board mounting portions 35, 35 'for holding the temporary floor board 34 and a temporary floor board receiving portion 36,
36 'is provided.

12 is a plan view of the temporary floor board 34, FIG. 13 is a partially enlarged view thereof, FIG. 14 is a sectional view taken along line FF of FIG. 13, FIG. 15 is a sectional view taken along line GG of FIG. 13, and FIG. Figures (a) and (b) are a front view and a side view of the temporary floor board lifting links 39, 39 '.

As shown in these figures, the temporary floor board 34 is made by frame-forming steel material, and is provided downward at a position corresponding to the temporary floor board mounting portions 35, 35 'provided on the suspension beam 26 of the lower erector 8 described above. A pair of projecting fittings 37, 37 'are fixedly attached, and the temporary floorboard 34 is lowered by inserting the pins 38 into the temporary floorboard mounting portions 35, 35' and the pin holes at the bottom of the fittings 37, 37 '. It can be held by the erector 8. Also, a pair of links 39, 39 'are pinned in the upper pin holes of the fittings 37, 37'.
They are connected by 40, and the pair of links 39, 39 'are raised vertically, and the pins 41 are inserted into the pin holes of each link and the pair of grips 18, 18' of the upper erector 7 to temporarily The floor plate 34 can be held by the upper erector 7. When the temporary floor board 34 is held by the lower erector 8,
By tilting the links 39, 39 'horizontally as shown by the chain double-dashed line in Fig. 14, these links are pulled in from the floor, and there is no obstacle in using them as a segment storage space and work floor for the upper erector 7. I am trying.

The vertical dimension a of the temporary floor board 34 is the L dimension in FIG. 17 (the length of the B segment inserted between the steps at the end of the segment assembly process).
The width b is made slightly smaller, and the lateral dimension b is substantially equal to the segment width W.

Next, the segment assembling procedure will be described with reference to FIG.
As shown in Fig. 17, the segment consists of four kinds of segments, A, B, K ₁ and K ₂ , and the long K ₁ segment of both wings and the short K ₂ segment of both wings are interchanged for each ring. Thus, the joint positions of the A segment and the K ₁ and K ₂ segments are shifted to form a staggered arrangement in the shield axis direction.

In FIG. 1, a hatched portion of a segment indicates an assembling completed portion, and a non-hatched portion indicates an incompletely assembled portion, and the assembly proceeds from (a) to (m).

(A) shows a state in which the lower stage A segment is assembled using the lower stage erector 8, and at this time, the temporary floor board 34 is held by the upper stage erector 7.

After the assembly of the lower stage A segment is completed, the temporary floor board 34 is transferred from the upper stage erector 7 to the lower stage erector 8 as shown in (b).

(C) shows a state in which the temporary floor board 34 held by the lower erector 8 is pushed up to a predetermined position between the steps, and the K ₁ segment is loaded on it.

(D) and (e) show a state in which the left lifting device 11 of the upper erector is independently operated to assemble the K ₁ segment, and the pressing jacks 27, 2 of the lower erector 8 are adjusted accordingly.
The temporary floor plate 34 is moved to a position where it does not interfere with the K ₁ segment being assembled by performing the pulling-in operation of 7 ′ and the pivoting operation of the arms 24, 24 ′.

(F) shows the completed assembly state of K ₁ segment.

(G) shows a state in which the temporary floor board 34 is returned to a predetermined position between steps and the upper A segment is carried on the temporary floor board 34.

(H) shows a state in which the upper-stage A segment is assembled by independently operating the right-side lifting device 11 ′ of the upper-stage erector 7. At this time, the pressing jacks 27, 2 of the lower-stage erector 8 are also assembled.
The temporary floor plate 34 is moved to a position where it does not interfere with the A segment being assembled by pulling in 7 '.

After the assembly of the upper A segment is completed, as shown in (i), the temporary floor board 34 is returned to the predetermined position between the stages, and the K ₂ segment is loaded on it.

(J) and (k) are left-side lifting devices for the upper erector 7.
11 shows a state in which K ₂ segment is being operated by operating it independently, and in accordance with that, the pressing jack retraction operation and arm turning operation of the lower erector 8 are performed, and the temporary floor board is placed at a position that does not interfere with the K ₂ segment being assembled. Move 34.

After the assembly of the K ₂ segment is completed, as shown in (1), the temporary floor board 34 is returned to a predetermined position between the steps, and the B segment is carried on it.

(M): Left and right lifting devices 11, 11 'of the upper erector 7
Is operated simultaneously to suspend the B segment, and the pressing jacks 27, 27 'of the lower erector 8 are retracted to complete the assembly of the B segment.

As described above, the segment assembly for one ring is completed, and after the shield is propelled, the temporary floor plate 34 is transferred from the lower stage erector 8 to the upper stage erector 7 to perform the next segment assembly.

As is apparent from FIG. 1, the temporary floorboard held by the lower erector is used as a floor for work such as fastening the bolts at the segment storage and the segment joint, and segment assembly is performed by the upper erector. By holding the upper erector, a series of segment assembly work can be safely and efficiently performed.

In the above embodiment, the quasi-circular portion of the lining ring has two upper and lower tiers, but the same method as above can be applied even if the number of tiers is three or four.

It is also clear from the above description that the non-invention is not limited to the case of the segment of the specific division method as shown in the drawing, and can be applied regardless of the segment division method.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the temporary floor board which should become the said segment storage and a work floor at the time of segment assembly by an upper stage erector can be easily provided without complicating the main body structure of a shield machine, and the segment assembly by an upper stage erector can be carried out. It is also possible to easily move the temporary floorboard to a position where it does not interfere with the segment by the pressing jack extension / contraction operation of the middle and lower erectors and the arm turning operation. In addition, if the temporary floorboards are exchanged between the upper and lower erectors and the upper erectors hold the temporary floorboards during segment assembly by the lower erectors, it is possible to save the labor of loading and unloading the temporary floorboards. Construction of a lining ring in a multiple shield tunnel can be performed safely and efficiently.

[Brief description of the drawings]

1 (a) to 1 (m) are diagrams of a segment assembling process in one embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a shield machine used in the present embodiment, FIG. 4 is an enlarged view of the erector part on the right side, FIG. 5 is a cut-away side view of the upper erector, FIG. 6 is a sectional view taken along line AA of FIG. 5, and FIG.
FIG. 8 is a sectional view taken along line C-B of FIG. 4, FIG. 9 is a cut-away side view of the lower erector, and FIG. 10 is DD of FIG.
Sectional view, FIG. 11 is a view taken in the direction of arrow E in FIG. 4, FIG. 12 is a plan view of the temporary floorboard, FIG. 13 is a partially enlarged view thereof, and FIG. 14 is F of FIG.
-F sectional view, FIG. 15 is a sectional view taken along line GG of FIG. 13, FIGS. 16 (a) and 16 (b) are a front view and a side view of a temporary floor board lifting link, and FIG. 17 is this embodiment. FIG. 18 is a diagram showing the segment assembly shape of FIG. 18, and FIG. 18 is a segment assembly procedure diagram in a conventional horizontal multiple shield tunnel. 1 ... Shield body, 7 ... Upper erector, 8 ... Lower erector, 34 ... Temporary floorboard, A, B, K ₁ , K ₂ ...... Segment

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hidetsugu Yamazaki 650 Jinrachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura factory (56) Reference JP-A-1-187299 (JP, A)

Claims (2)

(57) [Claims] 1. When constructing a lining ring of a vertical multiple shield tunnel by assembling segments in a shape in which a plurality of pseudo circular portions are connected in a vertical direction, shield digging is performed corresponding to the plurality of pseudo circular portions. A segment is assembled using multiple stages of erectors installed at the rear of the machine, and when the upper stage erector is assembled, the lower floor erector holds the temporary floorboard that should serve as the segment storage space and work floor. Tunnel lining ring construction method. 2. The method for constructing a lining ring for a shield tunnel according to claim 1, wherein the temporary floor board is held by the upper erector instead of the lower erector when the segment is assembled by the lower erector.