JPS63304896A - Shielding 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 capable of constructing a lining with cast-in-place concrete.

(b), Prior Art Recently, many proposals have been made to construct a tunnel lining excavated by a shield excavator using cast-in-place concrete, and the present applicant has also proposed Japanese Patent Application No. 61-36145, etc. proposed a shield excavator having a press ring that compresses concrete and a gauge ring that supports the formwork and obtains a propulsion reaction force from the formwork.

(C) 0 Problems to be Solved by the Invention However, in a shield excavator with such a structure, if the press ring and gauge ring can move diagonally with respect to the axis of the shield outer shell, the shield N can be removed. It becomes easier to deal with rolling and pitching.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a shield excavator in which a press ring and/or a gauge ring can be moved obliquely to the axis of the shield shell.

(d) Means for solving the zero problem, that is, the present invention provides a means for solving the problem of A lining (3a, 7a) made of a flexible material is provided on at least one of the spaces between the two.

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 provides linings (3a, 7
The deformation of a) acts to enable the press ring (3) and gauge ring (7) to move obliquely with respect to the axis (ST) of the outer shell (2).

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

FIG. 1 is a sectional view showing an embodiment of a shield excavator according to the present invention. FIG. 2 is a perspective view of a press ring. FIG. 3 is a perspective view of another example of the press ring.

As shown in FIG. 1, the shield excavator 1 has a cylindrical outer shell 2, and a known cutter (not shown) is provided on the left side of the outer shell 2 in FIG. There is. A press ring 3 formed in a cylindrical shape is supported inside the outer shell 2 so as to be movable in the directions of arrows A and B, which are the tunnel excavation directions. A plurality of drive cylinders 5 are arranged along the inner peripheral surface, and the drive cylinders 5 and the press ring 3 are pivotally connected via rods 5a of the drive cylinders 5. Therefore, the drive cylinder 5
By driving the rod 5a to protrude and retreat in the direction of the arrow A1B, the press ring 3 can be moved in the direction of the arrow ASB.

In addition, the outer circumferential surface of the press ring 3, therefore the press ring 3
As shown in FIG. 2, a lining 3a made of a flexible material such as rubber or high-molecular polyethylene is adhered between the outer shell 2 and the outer shell 2. As shown in FIG.

As shown in FIG. 1, a cylindrical gauge ring 7 is provided inside the press ring 3 so as to be slidable in the directions of arrows A and B, and the gauge ring 7 and the outer shell A plurality of propulsion jacks 9 are disposed along the inner circumferential surface of the outer shell 2 between the outer shell 2 and the outer shell 2, each having a rod 9a pivotally attached to the gauge ring 7.

Also, the outer peripheral surface of the gauge ring 7, therefore the gauge ring 7
A lining 7a made of a flexible material such as rubber or high-molecular polyethylene is attached between the press ring 3 and the press ring 3, and a lining 7a made of a flexible material such as rubber or high-molecular polyethylene is attached to the right side of the gauge ring 7 in the figure. A plurality of formworks 10 are formed in the directions of arrows A and B, that is, one of the tunnels 12! ! They are connected in the forward direction. In addition, number 11 is a skin plate provided at the rear end of the outer shell 2, and number 12 is a skin plate provided in an annular shape by air to prevent poured concrete from leaking between the gauge ring 7 and the press ring 3. It is an air fence that is inflated.

Since the shield excavator 1 has the above configuration,
When excavating the tunnel 12, if the lining 13 is formed of cast-in-place concrete, the outer shell 2 is
After excavating in the direction shown in Figure 1, formwork 1
0 is assembled and installed between the gauge ring 7 and the formwork 10' of the part where the lining 13 has already been constructed, and at the same time, the concrete between the assembled formwork 10 and the inner peripheral surface 2a of the outer shell 2 is installed. In the casting space 15, a reinforcing member 16 such as a reinforcing bar or a perforated iron plate is assembled and installed in a cylindrical shape. Next, in this state, concrete mortar 17 ("concrete mortar" here means "concrete" or "mortar") is supplied into the concrete placement space 15. In this state, the press ring 3 is moved in the direction of arrow B by the drive cylinder 5.
direction, the tip 3b of the press ring 3 is moved to a position where it substantially coincides with the rear end of the outer shell 2, as shown by the imaginary line in the figure, so that the concrete/mortar is moved to a position where the tip 3b of the press ring 3 substantially coincides with the rear end of the outer shell 2. and the formwork 10.

In this way, when a predetermined amount of concrete mortar has been placed between the press ring inner peripheral surface 3C and the formwork 10, the press ring 3 is moved while retreating in the direction of arrow A. As a result, concrete mortar is placed in a space 15a shown by diagonal lines in FIG. 1.

In this way, when the press ring 3 is moved to its full stroke in the direction of arrow A and concrete/mortar is placed in the space 15a, the propulsion jack 9 is driven to take a reaction force from the formwork 10 via the gauge ring 7. In the shape, start digging in direction A. At the same time, the press ring 3 is made to protrude in the direction of arrow B and is filled and cast into the space 15a,
The still fluid concrete mortar is pressed towards the skin plate 11. Then, as a result of the old path, the outer shell 2 moves in the direction A, and after the outer shell 2 passes, a tail void 19 is formed on the right side of the skin plate 11 in FIG.
The concrete mortar in the space 15a compressed by the press ring 3 flows into the tail void 19.
is effectively filled. In this way, when the shield excavation ml excavates a predetermined distance in the direction A and the press ring 3 is moved and driven to its full stroke in the direction of arrow B, the first bending movement is temporarily stopped and the gauge ring 7 is moved back in the direction of arrow A. let me,
A new formwork 10 is installed between the gauge ring 7 and the formwork 10゜ that the gauge ring 7 was in contact with and on which the lining 13 was constructed by this pouring, and the next lining 13 is constructed. enter the cycle.

In addition, pitching and rolling occur in the outer shell 2 in the middle of the old road, and in order to correct this, the press ring 3 and the gauge ring 7 are held at a predetermined angle with respect to the excavation direction, that is, the axis ST of the outer shell 2. It becomes necessary to move it in the B direction. However, even in such a case, a lining 3a is provided on the outer periphery of the press ring 3, and a gauge ring 7 is also provided.
Since the lining 7a is also provided on the outer periphery of the press ring 3, even if the press ring 3 is moved at a predetermined angle with respect to the outer shell axis ST, the lining 3a17a is deformed.
Since the movement is allowed, the correction operation is performed smoothly.

The same effect can be achieved even if the gauge ring 7 is moved at a predetermined angle with respect to the outer shell axis ST; in this case, the lining 7a is deformed to allow the movement, and the correction operation is performed smoothly.

In the above embodiment, the lining 3a is formed all around the press ring 3, but the lining 3a is formed so that the press ring 3 is formed at a predetermined angle with respect to the axis ST of the outer shell 2. As long as they can move in the A1B direction, it is not necessary to form them all around the press ring 3, and as shown in FIG. 3, it is also possible to install them at predetermined intervals. The same applies to the lining 7a of the gauge ring 7.

(g) 0 Effects of the Invention As explained above, according to the present invention, at least one of between the inner circumferential surface of the outer shell 2 and the press ring 3, and between the press ring 3 and the gauge ring 7, The lining 3a is constructed by providing the linings 3a and 7a made of a flexible material.

By deforming 7a, it becomes possible to move the press ring 3 and/or the gauge ring 7 diagonally at a predetermined angle with respect to the axis ST of the outer shell 2, and the rolling of the shield excavator 1 and Pitching can be corrected easily.

In addition, since the fitting relationship between the press ring 3 and the gauge ring 7 can be kept in a rough state, precise machining etc. are not required, and the press ring 3 and the gauge ring 7 can be manufactured only by can manufacturing work. It is possible to do this and is extremely economical.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a shield excavator according to the present invention. FIG. 2 is a perspective view of a press ring. FIG. 3 is a perspective view of another example of the press ring. 1...Shield tl Ill elf2...
Outer shell 3... Press rings 3n, 7n... Lining 7... Gauge ring s'r... Axis center Applicant Mitsui Construction Co., Ltd. 1 Agent Patent attorney Phase 1) Shinji ( 2 idiots) Figure 2 Figure 3 Q

Claims (1)

[Scope of Claims] It has an outer shell, a press ring is provided inside the outer shell so as to be movable along the axis of the outer shell, and a gauge ring is provided inside the press ring along the axis of the outer shell. In the shield excavator configured to be movable along the center, a flexible material is provided between at least one of the inner peripheral surface of the outer shell and the press ring, and between the press ring and the gauge ring. A shield excavator configured with a lining made of.