JPS63189598A - Shield excavator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a shield excavator suitable for use in constructing tunnel linings using cast-in-place concrete.

(b), Prior Art Recently, various proposals have been made for lining a tunnel excavated by a shield excavator with cast-in-place concrete.

(C)0The problem that the invention aims to solveHowever, now t
! The technology for effectively filling detail voids has not been established, and there is an urgent need to develop a shield excavator that can reliably fill the tail voids.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a shield drilling machine that can reliably fill tail voids.

(d) Means for solving the four-layer point, that is, the present invention has an outer shell (2), and a press ring (7) is installed inside the outer shell (2). Excavation direction t
A mold support member (11) is provided inside the press ring (7) so as to be movable with respect to the outer shell (2), and the mold support member (11) l and the mold are provided so as to be movable. A frame position adjustment means (11c) is provided, and an excavation jack (6) is provided on the formwork support member (11).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description should not be limited to the descriptions in the drawings. The following r (el
The same applies to the column ``, action''.

(e) 0 effect With the above-described configuration, the present invention acts so that the press ring (7) pressurizes the injected filling member (21) and fills it into the tail void (27). .

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a shield 1 according to the present invention! Figure 2 is a cross-sectional view taken along line n-II in Figure 1, Figure 3 is a cross-sectional view taken along line ■-■ in Figure 1, and Figure 4 is a cross-sectional view showing one embodiment of the iI cutting machine. An enlarged view of the jacking part of the shield excavator, Figure 5 is a cross-sectional view of Figure 4 ■-■
FIG. 3 is a process diagram showing an example of constructing a lining using the seal excavator cutting machine according to the present invention.

The shield excavator 1 has a cylindrical outer shell 2, as shown in FIG.
A cutter 3 is rotatably supported on the left side of the figure. The cutter 3 is driven by a drive motor 5 provided on a partition wall 2a of the outer shell 2, which is provided to block the space inside the outer shell 2 in the left-right direction.
Furthermore, a plurality of road jacks 6 are arranged on the partition wall 2a in an annular arrangement along the outer shell 2, as shown in FIGS. 1 and 2. Old road jack 6
A ram 6a is provided to be able to protrude and retreat in the directions of arrows A and B, and a press ring 7 formed in a cylindrical shape is provided inside the outer shell 2 so as to be in contact with the inner surface of the outer shell 2. , B
It is provided so as to be slidable in the direction. As shown in FIG. 2, the press ring 7 has a plurality of press ring jacks 9 arranged at predetermined intervals along the outer shell 2°. In between the second
As shown in the figures and FIG.
, that is, it is provided facing toward the rear of the shield excavator 1. Concrete discharge pipe] 0 (111) A cylinder 10b for cleaning the inside of the discharge pipe is provided with a rod 10c that can protrude and retreat in the directions of arrows C and D, and furthermore, a concrete supply hose 30 is attached to the discharge pipe 10. Connected.

By the way, at the tip of the ram 6a of the i-urethral jack 6,
A gauge ring 11 formed in an annular shape is attached, and the gauge ring 11 has an engagement f as shown in FIG.
il 11 a is formed in an annular shape around the entire circumference of the gauge ring 11 . Further, at the lower end of the gauge ring 11 in the figure, a collar 11b is formed in an annular shape.
As shown in FIG. 2, four positioning bolts 11C serving as formwork position adjustment means are screwed into 1b at 90° pitches. Furthermore, as shown in FIGS. 2 and 3, the gauge ring 11 is provided with a mold 13 assembled in an annular shape and connected in the left-right direction in FIG.

Since the shield 18 excavator 1 has the above configuration, when penalizing the tunnel 15, the cutter 3 is rotated by the drive motor 5, and the ram 6a of the excavation jack 6 is projected in the direction B in FIG. Then, the cutter 3 is pressed in the direction of the face 16, that is, in the direction of arrow A, via the partition wall 2a and the outer shell 2. Then, due to the pressing force, the cutter 3 and the face 16 come into contact with each other with a predetermined contact pressure, and the face 16 is excavated by the cutter 3. At the same time, the outer shell 2 is propelled in the direction A, and the tunnel 15 is moved toward the shield excavator 1. It is formed at the rear, that is, to the right in FIG.

In this way, as the tunnel 15 is formed, it is necessary to construct the lining 20 to prevent the excavated earth 19 from collapsing, and the construction of the lining 20 is performed in the following steps. That is, the shield excavator 1
When the excavation has been carried out in the A direction by the length Ll of the ring, the ram 6a of the excavation jack 6 is in the direction B as shown in FIG.
It is in a state of protruding in the direction, and the press ring 7
has also moved in the B direction.

In this state, the positioning bolt 11ciell is moved downward in the figure, that is, toward the center of the shield excavator 1, and the abutment and engagement between the positioning bolt llc and the formwork 13 is released. Next, as shown in FIG. 7, the ram 6a is moved back in the A direction by a distance 1aL1.

Then, the gauge ring 11 moves in the A direction away from the stop 22A and the formwork 13A of the part where the concrete 21 was placed just before, and a distance glL1 is created between the end stop 22A and the formwork 13A and the gauge ring 11. A space is formed.

Therefore, as shown by the imaginary line in FIG. 7, a reinforcing member 12 made of a steel plate, reinforcing bar, etc. is installed in the space along with a stopper 226 via the engagement groove 11a, and is further placed in contact with the formwork 13A. The formwork 138 is assembled and installed, and a concrete placement space 23 is formed between the formwork 13 , the gauge ring 11 (l! stop 22 ), the press ring 7 and the end stop 224 .

At this time, the positional relationship of the formwork 13 with respect to the gauge ring 11 is adjusted by appropriately rotating the four positioning bolts 11C attached to the gauge ring 11, as shown in FIG. By engaging and further rotating the bolt llc in this state, the formwork 13 can be adjusted by moving it in the directions of arrows E, F, G, and H in FIG. 3 via the bolt 11C. This results in
Adjustment can be made so that the inner surface 20a of the lining 20 cast and formed by the formwork 13 is formed at an accurate position based on the design.

When the formwork 138 is installed in the predetermined position, the concrete supply pipe 25 is connected to the formwork 13 as shown in FIG. to be poured. At this time, the air in the concrete placement space 23 is discharged to the outside through the air vent pipe 13a provided appropriately in the formwork 13, so that the pouring operation of the concrete 21 into the concrete placement space 23 is performed. is carried out smoothly.

After the concrete 21 has been placed in the concrete placement space 23 in this way, the press ring jack 9 is driven to gradually retreat the press ring 7 in the direction A, as shown in FIG. Then, after the press ring 7 passes, the outer shell 2 and the poured concrete 21
A space 26 is formed between them. Therefore, as the press ring 7 moves in the A direction, the concrete 21 is delivered from the concrete discharge pipe 10 to the space 2, as shown in FIG.
6 and fills the space 26 with concrete 1 and 21. The press ring 7 moves in six directions, and as shown in FIG.
2. As shown in FIG. 12, when the excavation jack 6 is driven to protrude in the ram 6a-t-B direction, the cutter 3 is rotated to start the excavation operation.

Then, as described above, the outer shell 2 starts moving in six directions, and after the outer shell 2 moves, a tail void 27 is formed between the poured and filled concrete 21 and the ground 19. Therefore, as the outer shell 2 moves in six directions, the press ring jack 9 is driven to gradually move the press ring 7 in the B direction in synchronization with the movement of the outer shell 2. Then, the unhardened concrete in the concrete placement space 23 and the space 26 that was previously placed is pressed by the press ring 7 and flows to fill the tail void 2f. In this way, as shown in FIG. 13, when the press ring 7 is moved in the direction B as the outer shell 2 moves in the A direction, the tail void 27 that occurs as a result of the movement of the outer shell 2 can be effectively filled. It is being done. Note that the press ring 7 has an annular shape as a whole.

As a result, the filling member such as the concrete 21 is pressed with uniform pressure over the entire circumference of the ring, and therefore the filling operation of the tail void 27 is performed uniformly and in good condition over the entire circumference of the outer shell 2. In this way, when the outer shell 2 is propelled by one ring, the press ring 7 has its side surface 7a aligned with the rear end of the outer shell 2, as shown in FIG. Construction is complete.

At this time, the pouring surface 29 of the concrete 21 is formed into a step-like shape by the movement of the press ring 7, as shown in FIG.

(g) 0 Effects of the Invention As explained above, according to the present invention, the outer shell 2 is provided, and the press ring 7 is provided inside the outer shell 2 so as to be movable in the excavation direction of the outer shell 2. Furthermore, a formwork support member such as a gauge ring 11 is provided inside the press ring 7 so as to be movable with respect to the outer shell 2, and a formwork support member such as a positioning pole 1-11c is provided on the formwork support member 11. Since the position adjusting means is provided and the digging jack 6 is provided on the formwork support member 11, the tail void 27 is effectively filled with the filling member pressurized by the press ring 7, resulting in high reliability. It becomes possible to construct a tunnel lining. Moreover, since the pouring surface 29 of the filling member in the lining 20 is formed in a step-like shape, the water-stopping effect is large.

In addition, since the formwork support member is provided with a means for adjusting the position of the formwork, it becomes possible to position the formwork 13 at the exact construction position of the lining 20, and highly reliable construction becomes possible. Furthermore, even when a deformed formwork is used as a formwork in the case of curve construction, etc., the formwork can be held and positioned at an appropriate position by the position adjustment means. In addition, as the position adjustment means of the formwork, the formwork 13,
Of course, any device may be used as long as the position in the directions of arrows E, F, G, and H in FIG. 3 can be adjusted, and in addition to the positioning bolt 11c, a hydraulic jack or the like may also be used.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing an embodiment of a shield excavator according to the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG.
Figure 4 is an enlarged view of the jacking part of the shield l bending machine; Figure 5 is a cross-sectional view taken along line ■-■ in Figure 4; Figures 6 to 1
FIG. 3 is a process diagram showing an example of constructing a lining using the shield excavator according to the present invention. 1...Shield excavator 2...Outer shell 6...1! ! Advance jack 7...Press ring 11...Form support member (gauge ring) 11c
...Position adjustment means (positioning bolt) 13...
... Formwork 20 ... Lining applicant Mitsui Construction Co., Ltd. agent Patent attorney Phase 1) Figure 2 Figure 6 Figure 7 Figure 8 Figure 10 Figure 11 Figure 12 figure

Claims (1)

[Claims] It has an outer shell, a press ring is provided inside the outer shell so as to be movable in the excavation direction of the outer shell, and a form support member is provided inside the press ring relative to the outer shell. What is claimed is: 1. A shield excavator, wherein the formwork support member is provided with a formwork position adjustment means, and the formwork support member is provided with an excavation jack.