JPH11229754A - Advanced shaft-type shield drilling method and equipment - Google Patents

Abstract

(57) [Summary] (Modified) [Problem] An advanced shaft-type shield excavation method capable of removing a segment constructed as an advanced shaft-type tunnel and assembling a segment of a subsequent main shaft tunnel. And provide the equipment. A pilot tunnel excavator is used to excavate a shaft section, a pilot segment is assembled, a pilot tunnel is constructed, and a pilot tunnel is used as a guide to excavate the main tunnel using a shield excavator. The segment 2 is assembled, the pilot segment is removed, the main tunnel is shifted from the shaft in the forward direction, and the main tunnel segment is supplied from the shaft in the rear direction. A concentric revolving part 3 is installed between the main tunnel segment and the pilot segment, and an erector 4 that rotates along the revolving part is attached. The erector is equipped with a telescopic jack 5 and both telescopic jacks are provided. A segment gripping member 61 was provided at the tip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield excavation method and an apparatus therefor in an urban area.

[0002]

2. Description of the Related Art In a city area, when a shield excavation method with a large cross section is employed, a large amount of earth and sand is generated, and depending on the road conditions at a place where a shield machine is to be set up, it is difficult to carry out the earth and sand. This can be a factor in lowering the excavation speed.

[0003] In order to solve this problem, there is a plan to apply the excavation method of the advanced tunnel and the main tunnel, which is conventionally performed by the mountain tunnel method, to the shield excavation method. In other words, the plan is to use a shaft with good traffic conditions such as roads and easy to carry out earth and sand as a dedicated shaft for the removal of residual soil, and use a shaft with poor traffic conditions such as roads as a base for segment import and various equipment import / export. is there.

[0004] In this case, however, the segment constructed as an advanced shaft tunnel must be removed, and the following problem occurs when the removal erector for that purpose is used in the same manner as before. The shape and performance of the erector are too small to be used as an erector for the following main tunnel (large section), and an erector for another main tunnel (large section) must be provided. Even if the removal erector is independent or attached to the shield excavator, the members for supporting the segment will be large, and the working space inside the shield excavator will be large. Is inefficient and inefficient.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and is intended to remove a segment constructed as an advanced tunnel and to remove a segment of a subsequent main tunnel. It is an object of the present invention to provide an advanced shaft-type shield excavation method and apparatus capable of assembling and carrying out.

[0006]

The present invention relates to a shield excavation method for excavating an advanced tunnel in a mountain tunnel and a main tunnel using a shield excavator in an urban area. Advanced drilling with an excavator, assembling a pilot segment to construct a pilot tunnel, drilling with a shield tunnel excavator for the main tunnel using the pilot tunnel as a guide, assembling the segment for the main tunnel, and removing the pilot segment This is an advanced shaft-type shield excavation method, characterized in that the main shaft tunnel is shifted from the shaft in front of the excavation direction, and the main tunnel tunnel segment is supplied from the shaft in the rear of the excavation direction. This is an equipment for a shaft-type shield excavation method, which includes a tunnel for main shaft tunnel and a pyro In the middle of the segment, a concentric turning part is installed, an erector that rotates along the turning part is attached, and the erector is equipped with a telescopic jack that expands and contracts in both directions inside and outside the turning part. Both end portions are equipped with a segment gripping member,
This is an advanced shaft type shield excavator.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

<A> Overall Configuration FIG. 1 is a front view of an erector 4 device in an advanced shaft shield excavator according to the present invention. Electa 4 device,
An intermediate portion between a pilot segment 1 of a tunnel constructed by an advanced shaft (hereinafter referred to as a pilot tunnel) and a main tunnel segment 2 of a large-section tunnel (hereinafter referred to as a main tunnel) constructed subsequently. A concentric turning part 3 is installed, and an erector 4 that rotates along the turning part 3 is mounted. The erector 4 is equipped with a telescopic jack 5 that expands and contracts in both directions inside and outside the turning part 3. At both ends of the jack 5, a segment gripping member 61,
62 are equipped.

<B> Turning Part The turning part 3 is installed in a shield excavator for excavating the main tunnel, and is installed at an intermediate position between the pilot segment 1 and the main tunnel segment 2. It is installed concentrically.

<C> Elector FIG. 2 is a perspective view of the erector 4 according to the present invention. The erector 4 includes a segment gripping member 61 for gripping the pilot segment 1, a segment gripping member 62 for gripping the main tunnel segment 2, and two telescopic jacks 5, 5 connecting the segment gripping members 61, 62. It consists of.

<D> Segment gripping member As described above, the segment gripping members 61 and 62 are connected by the two extendable jacks 5 and 5, and the segment gripping member 61 matches the curvature of the pilot segment 1 and The segment gripping member 62 is curved in accordance with the curvature of the main tunnel segment 2. At the center of both segment gripping members 61 and 62, a support piece 7 for engaging a gripping tool 9 (FIG. 3) described later is installed.
The pilot segment 1 and the main shaft tunnel segment 2 are configured to be fixed to both segment gripping members 61 and 62 by engaging the gripping tool in the support piece 7. Further, support jacks are provided at the ends of the grip members 61 and 62 in order to adjust the posture of the segments. (Not shown)

<E> Telescopic Jack The telescopic jack 5 is a commonly used jack, and both ends of the rod 52 built in the cylinder 51 are fixed to the both-segment gripping members 61 and 62 by an arbitrary method. It is configured as follows. In addition, the central portion of the cylinder 51 is fixed to the revolving unit 3, and by rotating the revolving unit 3, the elector 4 is simultaneously rotated.

<F> Pilot Segment FIG. 3 is a perspective view of a pilot segment 1 according to the present invention. A grout hole 8 penetrates the center of the pilot segment 1, and a screw hole in the grout hole 8 is cut in the same direction as the thread of the gripper 9 (FIG. 2). The segment cross section perpendicular to the tunnel axis direction is
It is formed so as to have a cross section that is enlarged toward the outside of the tunnel cross section.

[0014]

The advanced shaft-type shield excavation method according to the present invention will be described below.

<A> Installation of shafts FIGS. 4 and 5 are longitudinal sectional views showing an advanced shaft type shield excavation state according to the present invention. In FIGS. 4 and 5, A is a shaft installed in a place with a large traffic volume such as a car and a bad road condition, and B is a shaft installed in a place with a good road condition. In the present invention, the shaft B installed in a place where road conditions are good is used as a dedicated shaft for carrying out excavated earth and sand, and the shaft A installed in a place where traffic such as automobiles is heavy and road conditions are poor is used for loading a segment. And used as a shaft for carrying in and out of various facilities. The efficiency of shield excavation work is greatly improved by properly using the shafts A and B according to the purpose of installation.

<B> Construction of Pilot Tunnel In FIG. 4, a pilot shield excavator 10 is carried into the shaft B, and the pilot tunnel 1 is
1 is built until shaft A is reached. The segment used for constructing the pilot tunnel 11 is the pilot segment 1 (FIG. 3).

<C> Construction of the main tunnel After completion of the construction of the pilot tunnel, the main tunnel is constructed. (Fig. 5)

Referring to FIG. 5, a shield tunneling excavator 12 for a main shaft tunnel is carried into a shaft A, and a tunnel 13 for a main shaft is dug until reaching a shaft B. When excavating the main tunnel 13, the existing pilot tunnel 11 is used as a guide. Excavation is carried out by a normal shield excavator, but the removal of excavated earth and sand is performed by installing a shearing device in the existing pilot tunnel 11 and setting the shaft B installed in a location with good road conditions to carry out excavated earth and sand. It is carried out from this shaft B as a dedicated shaft.

Removal of Pilot Segment As the main tunnel 13 excavates, the existing pilot segment 2 which becomes an obstacle is removed. 1 and 2, one segment gripping member 62 of the erector 4 that rotates along the turning portion 3 functions as an assembly for gripping the main tunnel segment 2 and the other segment gripping member. Reference numeral 61 functions to hold the pilot segment 2 and remove it. Each of the segments 1 and 2 is fixed to the segment holding members 61 and 62 by screwing the holding tool 9 into the support piece 7. (FIGS. 2 and 3) The removal of the pilot segment 1 is performed by extending the rod 52 of the telescopic jack 5 and inserting the support piece 7 of the segment gripping member 61 into the grout hole 8 of the pilot segment 1, 9 is screwed into the support piece 7 and fixed, the connecting bolt (not shown) between the segments 1 and 1 is removed, and the rod 52 of the telescopic jack 5 is contracted, whereby the pilot segment 1 is removed. Since the pilot segment 1 is formed so as to have a cross section enlarged toward the outside of the tunnel cross section, when the rod 52 of the telescopic jack 5 is contracted, it can be removed without resistance.

Assembling of the tunnel for main tunnel The assembly of the segment for main tunnel is performed by extending the rod 52 of the telescopic jack 5 so that the support piece 7 of the segment gripping member 62 is formed in a grout hole (see FIG. (Not shown), the fixing tool 9 is screwed into the support piece 7 and fixed, and moved to the segment assembling position.
The assembling work is performed in the same manner as in the related art.

[0021]

[Embodiment 2] FIG. 6 is a front view showing another embodiment of the present invention. The erector 4 in this embodiment is
The rotary table 14 is mounted on the erector 4 that rotates along the turning section 3, and the segment gripping member 6 is mounted on only one end of the telescopic jack 5. The segment gripping member 6 is expanded and contracted by the expansion and contraction operation of the expansion and contraction jack 5, and the pilot segment 1 is gripped and removed. In addition, the turntable 14 of the erector 4 is rotated to grip and assemble the main tunnel segment 2. Work.

[0022]

Third Embodiment FIG. 7 is a front view showing still another embodiment of the present invention. The erector 4 in the present embodiment is provided with a segment gripping member 62 for assembling the tunnel tunnel segment 2 on one of the erectors 4 rotating along the swivel section 3, and is provided at a 180-degree symmetric position of the erector On the other side, a segment gripping member 61 for removing the pilot segment 1 is provided on the turntable 14. In the present embodiment, it is necessary to assemble the tunnel shaft segment 2 at a position symmetrical with respect to the pilot segment 1 by 180 degrees.
When the pilot segment 1 is gripped by the segment gripping member 61 and removed, the rotating disk 14 can be removed by rotating the turntable 180 by 180 degrees.

[0023]

Since the present invention has been described above,
The following effects can be obtained. <B> The erector is economical because the swivel can be used in common for removing the pilot segment and assembling the main tunnel segment. <B> Since the pilot segment can be removed in a large space outside, safety and work efficiency are improved. <C> The compactness of the elector device improves workability and economy.

[Brief description of the drawings]

FIG. 1 is a front view of an erector device in an advanced shaft shield excavator according to the present invention.

FIG. 2 is a perspective view of an erector.

FIG. 3 is a perspective view of a pilot segment.

FIG. 4 is a vertical sectional view showing an advanced shaft type shield excavation state according to the present invention.

FIG. 5 is a vertical cross-sectional view showing the state of the state of the art of an advanced shaft shield excavation.

FIG. 6 is a front view showing another embodiment of the present invention.

FIG. 7 is a front view showing still another embodiment of the present invention.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Kaji 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Masahiro Nakamura 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (72) Inventor Masahiko Sugiyama 1-1-1 Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Prefecture

Claims (6)

[Claims] The present invention relates to a shield excavation method for excavating an advanced tunnel in a mountain tunnel and a main tunnel using a shield excavator in an urban area. Drilling, assembling pilot segments to construct a pilot tunnel, excavating with a shield tunneling machine for the main tunnel using the pilot tunnel as a guide, assembling the main tunnel segment, removing the pilot segment, and An advanced shaft-type shield excavation method, in which the main shaft tunnel is displaced from the vertical shaft, and the main shaft tunnel segment is supplied from the shaft in the rear of the excavation direction. 2. The advanced shaft-type shield excavation method according to claim 1, wherein the pilot segment is dismantled and removed toward the outside of the pilot tunnel. . 3. An advanced shaft shield excavation method according to claim 1, wherein the pilot segment has a grout hole penetrating therethrough, and the segment cross section perpendicular to the tunnel axial direction is: An advanced shaft-type shield excavation method characterized by a cross section that expands outward. 4. An apparatus according to claim 1, wherein a concentric revolving part is provided between the main tunnel segment and the pilot segment. Equipped with an erector that rotates along the revolving part, the erector is equipped with a telescopic jack that expands and contracts in both directions inside and outside the revolving part, and the distal end of the telescopic jack is equipped with a segment gripping member. An advanced shaft-type shield drilling rig, characterized in that: 5. The advanced shaft-type shield excavator according to claim 4, wherein a rotating disk is provided on the erector that rotates along the turning portion, and a segment gripping member is provided only on one end of the telescopic jack. An advanced shaft-type shield drilling rig, characterized in that: 6. An advanced shaft-type shield excavator according to claim 4, wherein one of the erectors rotating along the turning portion is provided with a segment gripping member for assembling a segment for the main tunnel. An advanced shaft-type shield excavator, wherein a gripping member for removing a pilot segment is provided on a turntable at another one of the 180-degree symmetric positions of the erector.