JPH02101296A - Shield drilling machine and construction method using shield drilling machine - Google Patents

Abstract

PURPOSE:To construct a tunnel with cast-in-place concrete and a segment by installing a formwork or a segment inside a press ring provided inside an outer hull and movable in the propulsion direction. CONSTITUTION:When construction is to be performed with cast-in-place concrete, a formwork 13 is installed inside a press ring 7. A gauge ring jack 6 is driven to press a gauge ring 11 to the formwork 13 side, and concrete 33 is placed between the formwork 13 and the press ring 7. A shield drilling machine 1 is advanced in the arrow A direction, then the similar process is repeated to construct a tunnel. When the tunnel is to be constructed with a segment in the aquifer ground or the like, the segment is assembled inside the press ring 7, a seal means is provided between the outer periphery of the segment and the inner periphery of the press ring 7, and a filler material is placed on the outside of the seal means.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a shield excavator capable of constructing a lining using both cast-in-place concrete and segments, and a method for constructing a lining using a shield excavator. Concerning construction methods.

(b), Prior Art Recently, in Japanese Patent Laid-Open Publication No. 303073/1984, a proposal has been made to form a tunnel excavated by a shield excavator using cast-in-place concrete without using segments.

(C) 0 Problems to be Solved by the Invention However, in some on-site situations, it may be preferable to construct the lining in segments. It would be desirable to develop a method for constructing the structure.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a shield excavator capable of constructing both cast-in-place concrete and segments, and a method for constructing a lining using the shield excavator.

(d) Means for solving problem 1, that is, the present invention has an outer shell (2), and a press ring (7) is disposed inside the outer shell (2) so as to be freely movable in the tunnel advancing direction. A gauge ring (
11) movable in the direction of tunnel excavation, and a shield excavator configured by arranging a plurality of urethral jacks (6) on the gauge ring (11) to line the tunnel resulting from excavation. When constructing with cast-in-place concrete, formwork (1) is placed inside the press ring (7).
3) and press the formwork (13) and press ring (7).
If the lining is constructed by pouring concrete between the press ring (7) and the segment (31), assemble the segment (31) inside the press ring (7) and the segment (3). )) and the inner circumferential surface (71) of the press ring (7).
32) and a filler (33) on the outside of the sealing means.
It should be constructed in such a way that it would be poured.

Further, the present invention has an outer shell (2), a press ring (7) is provided inside the outer shell (2) so as to be movable in the direction of tunnel advancement, and a gauge is provided inside the press ring (7). ring(
11) so as to be movable in the tunnel excavation direction, and furthermore, a plurality of excavation jacks (6) are provided on the gauge ring (11).
It is divided into an inner peripheral jack (6A) and an outer peripheral jack (6,), and is arranged alternately on the circumference with different diameters (DI, D2).

Furthermore, the present invention has an outer shell (2), a press ring (7) is provided inside the outer shell (2) so as to be movable in the bending direction of the tunnel 1, and a press ring (7) is provided inside the press ring (7). A gauge ring (11) is provided to be movable in one bending direction of the tunnel, and the gauge ring (11) is further provided with a plurality of digging jacks (6), divided into an inner jack (6A) and an outer jack (611). When constructing a lining with cast-in-place concrete for a tunnel resulting from excavation using shield excavators arranged alternately on the circumference with different diameters (DI, D2), it is necessary to When the circumferential jack (6A) is mainly driven to take the propulsive reaction force of the shield excavator from the position facing the formwork (13), and the lining is constructed with segments (31), the outer circumferential jack (6a) The shield excavator is mainly driven so that the propulsion reaction force of the shield excavator is taken from a position facing the segment (31).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on 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 sealing means (31b, 32
) is cast on the outside of the segment (31).
3) The shield acts to prevent intrusion into the inside of the excavator.

In addition, when constructing a lining with cast-in-place concrete, the inner peripheral jack (6A) of the excavation jacks (6) is mainly driven, and when constructing a lining with segments (31), the outer peripheral jack It mainly drives the jack (6) and acts to take up the propulsive reaction force.

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

Fig. 1 is a view of the shield excavator according to the present invention in the direction of arrow I in Fig. 5, and Fig. 2 is a cross-sectional view of the vicinity of the gauge ring when constructing a lining with cast-in-place concrete using the shield excavator according to the present invention. , Fig. 3 is a cross-sectional view of the vicinity of the gauge ring when a lining is constructed using segments using the shield excavator according to the present invention, and Fig. 4 is a sectional view of the vicinity of the gauge ring when a lining is constructed using segments using the shield excavator according to the present invention. FIG. 5 is a sectional view showing an embodiment of the shield excavator according to the present invention.

The shield excavator 1, as shown in FIGS. 1 and 5,
The cutter 3 has a cylindrical outer shell 2, and a cutter 3 is rotatably supported on the front surface of the outer shell 2, that is, on the left side surface in FIG. The cutter 3 is connected to 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. A plurality of them are arranged in an annular shape along the outer shell 2. The ram 6a is indicated by arrow A on the excavation jack 6.
, are provided so as to be able to protrude and retract freely in the B direction, and furthermore, the outer shell 2
A press ring 7 formed in a cylindrical shape is provided inside the press ring 7 in contact with the inner surface of the outer shell 2 so as to be slidable in the directions of arrows A and B, which are the excavation directions. A plurality of press ring jacks 9 are arranged on the press ring 7 at predetermined intervals along the outer shell 2, and the press ring 7 further includes:
As shown in FIG. 2, a plurality of concrete discharge pipes 7b are provided with the discharge lower C at the tip facing the side surface 7a of the press ring 7, that is, the rear of the shield excavator 1.

By the way, as already mentioned, the gauge ring 11 has a plurality of digging jacks 6 arranged along the inner circumference of the outer shell 2, and the opening jacks 6 have a diameter as shown in FIG. It has an inner peripheral jack 6A arranged on the circumference of Dl and an outer peripheral jack 6 arranged on the circumference of diameter D2. The inner peripheral jacks 6A and the outer peripheral jacks 6B are arranged alternately.

Further, as shown in FIG. 5, a gauge ring 11 formed in an annular shape is attached to the tip of the ram 6a of the road jack 6, and the gauge ring 11 has an engaging groove 11a.
is formed in an annular shape around the entire circumference of the gauge ring 11. Further, the gauge ring 11 is provided with a formwork 13 which is assembled into an annular shape and is connected to the reinforcing member 12 in the left-right direction in FIG.

Since the shield excavator 1 has the above configuration,
When constructing a lining with cast-in-place concrete using the shield excavator 1, as shown in FIGS. 2 and 5, the formwork 13 is assembled and installed in a circular shape, and the formwork 13 and A concrete placement space 30 is formed between the ring 7 and the ring 7.
A reinforcing material 12 such as reinforcing bars or iron plates is installed inside. In this state, among the gauge ring jacks 6, the inner peripheral jack 6 on the inner peripheral side is mainly driven, and the outer peripheral jack 6 on the outer peripheral side is driven as a subsidiary to press the gauge ring 11 against the formwork 13, and then Concrete 33 in concrete pouring space 30
Pour inside. In this state, the shield 1 bending machine 1 is made to dig in the direction of arrow A to form a tunnel (however, the urethral reaction force at this time is taken from the formwork 13 side. is located on the inner circumferential side of the concrete casting space 30 where the concrete is poured, but it is mainly used to remove reaction force 1 bending jack 6
is the inner circumferential jack 6A disposed on the inner circumferential side, so the inner circumferential jack 6 and the formwork 13 face each other via the gauge ring 11, as shown in FIG. 2, and one urethral reaction force without producing harmful rotational moments, etc.
It can be removed from the formwork 13 side.

The method of constructing the lining using cast-in-place concrete is as follows:
Since it is described in detail in Japanese Patent Application Laid-Open No. 61-303073, etc., the explanation thereof will be omitted here.

Next, if it is difficult to construct a lining with cast-in-place concrete due to water-logged ground, etc., as shown in FIG. Build the lining according to 31. When the segments 31 are assembled in an annular shape, between the outer circumference of the segment 31 and the inner circumference of the press ring 7,
Inject quick-setting grout or attach water-resistant stickers,
A seal layer 32 is formed on the outer peripheral surface 31a of the segment 31. Next, drive the excavation jack 6 to move the gauge ring 11 in the direction of arrow B in FIG. 3, so that the gauge ring 11 and the segment 31 come into contact with each other. In this state, furthermore, the inner and outer peripheral jacks 6B of the opening jacks 6 are mainly driven, and the inner peripheral jacks 6A on the inner peripheral side are driven as a subsidiary to start digging while taking the reaction force to the segment 31, A tunnel is formed in the direction of arrow A. In this case, the outer peripheral jack 6B is mainly driven and the reaction force is taken away, so the segment 31 and the outer peripheral jack 6B, which were originally arranged in the concrete placement space 30 part in FIG.
They are opposed to each other via the gauge ring 11, and the propulsive reaction force can be taken from the segment 31 portion without creating harmful rotational moments or the like.

In this way, the shield excavator 1 excavates in the direction of arrow A,
After the press ring 7 has passed, between the segment 31 and the ground 19, concrete 33 is placed and supplied as a filler from a concrete discharge pipe 7b provided in the press ring 7. In addition, since a sealing layer 32 is formed between the assembled segments 31 and the press ring 7, the poured concrete 33 is sealed to the segments 31.
It does not flow into the inside of the shield excavator through the gap between the outer circumferential surface of the press ring 7 and the inner circumferential surface of the press ring 7.

Note that the sealing means such as the sealing layer 32 is the press ring 7.
Any configuration may be used as long as it exhibits a sealing function between the segment 31 and the assembled segment 31. For example, as shown in FIG. Of course, it is also possible to provide a sealing member 31b that makes contact with the pressure.

(g) Effects of the first 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 bending direction of the tunnel 1. A shield excavator is used in which a gauge ring 11 is provided inside a press ring 7 so as to be movable in the tunnel excavation direction, and a plurality of excavation jacks 6 are arranged on the gauge ring 11. When constructing the construction with cast-in-place concrete, a formwork 13 is installed inside the press ring 7, concrete is poured between the formwork 13 and the press ring 7, and the lining is constructed. When constructing with segments 31, the segments 31 should be assembled inside the press ring 7, and a seal layer 32 and a seal member 31b should be installed between the outer peripheral surface 31a of the segment 31 and the inner peripheral surface 7a of the press ring 7. The structure is configured such that a sealing means is formed, and a filler such as concrete is placed on the outside of the sealing means. This prevents the shield from entering the excavation machine through the gaps, and allows construction of a lining using cast-in-place concrete or segments 31 in accordance with the conditions at the construction site.

It also has an outer shell 2, and a press ring 7 inside the outer shell 2.
A gauge ring 11 is provided inside the press ring 7 so as to be movable in the direction of tunnel excavation, and the gauge ring 11 is provided with a plurality of l urethral jacks 6, an inner peripheral jack 6, etc. Since the outer jacks 6a are arranged alternately on the circumference with different diameters D1 and D2, when constructing a lining with cast-in-place concrete, the inner jacks 6A are mainly driven. In the case where the propulsive reaction force is taken from the side of the inner jack 6A facing the formwork and the lining is constructed using segments, the outer jack 6 is mainly driven, and the outer jack 68 facing the segment 31 is Propulsive reaction force can be taken from the side, and the lining can be constructed using cast-in-place concrete and segments 31.

It also has an outer shell 2, and a press ring 7 inside the outer shell 2.
is provided movably in the direction of tunnel excavation, and a gauge ring 11 is provided inside the press ring 7 so as to be movable in the direction of tunnel excavation, and furthermore, the gauge ring 11 is provided with a plurality of excavation jacks 6, an inner circumference jack 6A and an outer circumference. Using shield excavators arranged alternately on the circumference with different diameters DI and D2, the lining is constructed using cast-in-place concrete for the tunnel created as a result of one bending. In this case, when the inner peripheral jack 6A is mainly driven to take the propulsive reaction force of the shield excavator from the position facing the formwork 13 and the lining is constructed using the segments 31,
Since the configuration is such that the propulsive reaction force of the shield excavator is taken from the position facing the segment 31 by mainly driving the outer peripheral jack 66, the propulsive reaction force can be taken without generating any harmful rotational moment, and the process is smooth. This makes it possible to create a new path.

[Brief explanation of the drawing]

Fig. 1 is a view of the shield excavator according to the present invention in the direction of arrow I in Fig. 5, and Fig. 2 is a cut-off near the gauge ring when constructing a lining with cast-in-place concrete using the shield excavator according to the present invention. Figure 3 is a sectional view of the vicinity of the gauge ring when a lining is constructed using segments using the shield excavator according to the present invention, and Figure 4 is a sectional view of the lining constructed using segments using the shield excavator according to the present invention. FIG. 5 is a sectional view showing an embodiment of the shield excavator according to the present invention. 6... Excavation jack 6A... Inner circumference jack 6B... Outer circumference jack 7... Press ring 7a... Inner circumference surface 11... ... Gauge ring 13 ... Formwork 31 ... Segment 31a ... Outer peripheral surface 31b ... Sealing means (seal N material) 32 ...
...Seal layer 33...Filling material (concrete)

Claims (3)

[Claims] (1) It has an outer shell, a press ring is provided inside the outer shell so as to be movable in the tunnel excavation direction, a gauge ring is provided inside the press ring so as to be movable in the tunnel excavation direction, and a gauge ring is further provided. When using a shield excavator configured with a plurality of excavation jacks arranged in the tunnel, and constructing a lining with cast-in-place concrete for the tunnel created as a result of excavation, a formwork is installed inside the press ring. , when constructing by pouring concrete between the formwork and the press ring, and constructing the lining with segments, assemble the segments inside the press ring, and connect the outer peripheral surface of the segment and the press ring. 1. A method for constructing a lining using a shield excavator, comprising: forming a sealing means between the sealing means and the inner circumferential surface; and depositing a filler on the outside of the sealing means. (2) It has an outer shell, a press ring is provided inside the outer shell so as to be movable in the tunnel excavation direction, a gauge ring is provided inside the press ring so as to be movable in the tunnel excavation direction, and a gauge ring is further provided. A shield excavator that consists of multiple excavation jacks, divided into inner jacks and outer jacks, arranged alternately on a circumference with different diameters. (3) It has an outer shell, a press ring is provided inside the outer shell so as to be movable in the tunnel excavation direction, a gauge ring is provided inside the press ring so as to be movable in the tunnel excavation direction, and a gauge ring is further provided. A shield excavator is used to line the tunnel that results from excavation using a shield excavator consisting of multiple excavation jacks, divided into inner jacks and outer jacks, arranged alternately on a circumference with different diameters. When constructing with cast-in-place concrete, the inner jack is mainly driven to take the propulsive reaction force of the shield excavator from the position facing the formwork, and when the lining is constructed in segments, the outer jack is A method for constructing a lining using a shield excavator configured to mainly drive the shield excavator so that the propulsive reaction force of the shield excavator is taken from a position facing the segment.