JP3434782B2 - Starting method and starting device for shield machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for starting a shield machine for excavating under a road or under a river where it is difficult to construct a vertical shaft.
The present invention relates to a starting method and a starting device of a shield machine for branch excavation of a wide tunnel that constructs a junction / junction of an interchange, a substation, and a junction of a sewer pipe.

[0002]

2. Description of the Related Art Conventionally, when constructing a subway station or the like under a road, the road lane is reduced and the work zone is relocated while earth retaining is performed and then construction is performed by the excavation method. Exploration, relocation, and restoration work for the items were required. Therefore, on highways with heavy traffic, work was only done at night. Also, when constructing under a river,
It was necessary to close a part of the river.

On the other hand, Japanese Patent Laid-Open No. 10-317876 discloses a technique for excavating a tunnel having a wide rectangular cross section such as a subway station with a parent-child shield machine, and Japanese Patent No. 2700714 discloses a technique for branching a shield. Patent No. 2
It is disclosed in Japanese Patent No. 951096, Japanese Patent No. 2835390, and Japanese Patent No. 2921824. However, these techniques do not branch a wide tunnel for constructing a subway station building and excavate with a shield machine when it is difficult to open and cut a starting shaft such as under a road or under a river. Further, when the excavation distance from the vertical shaft is short, using a shield machine unnecessarily complicates the excavator, resulting in increased man-hours and costs.

[0004]

Therefore, according to the present invention, for example, in the case of constructing a subway station or the like under a road or river without excavating a start shaft on a road or river that is difficult to excavate, It is an object of the present invention to provide a starter method and a starter device for a shield machine in which a vertical shaft is provided in an unobtrusive place, a relatively short distance is excavated from the vertical shaft, and a tunnel is branched and excavated.

[0005]

According to the method for starting a shield machine of the present invention, a shield machine in which a predetermined number of shield machines are propulsively press-fitted with the propulsion machine at the head by means of an original push jack arranged in the start shaft. In the starting method of the method, a source pushing jack is directly applied to the propulsion unit to dig a certain distance underground from the starting shaft, and then a shield machine is connected to the rear of the propulsion unit and the source pushing jack is connected to the shield unit. Repeatedly pushing out the force of the above for the number of the predetermined shield machines. Further, according to the starting method of the shield machine of the present invention, it is a starting method of the shield machine in which a predetermined number of shield machines are propulsively press-fitted with the propulsion machine at the head by the source push jack arranged in the starting shaft. After directly driving the thruster into the propulsion machine and excavating the ground for a certain distance from the starting shaft, connect the shield machine to the rear of the propulsion machine and directly apply the force of the thruster to the shield machine. Pushing out is repeated for a predetermined number of shield machines, and a rear propulsion pipe is connected to the rear of the shield machine, and the force of the original push jack is directly applied to the rear propulsion pipe to push it out. Then, according to the starter of the shield machine of the present invention, a predetermined number of shield machines are sequentially connected to the rear of the propulsion machine, and a source jack is provided between the shield machine closest to the start shaft and the start shaft. ing. Furthermore, according to the starting device of the shield machine of the present invention, a predetermined number of shield machines are sequentially connected to the rear of the propulsion machine, and the rear propulsion pipe is connected to the rear of the shield machine closest to the starting shaft side. A push jack is provided between the rear propulsion pipe and the starting shaft.

Therefore, according to the present invention, the starting shaft is excavated at a place apart from the road or river which is not the shield starting portion, and a plurality of shield machines are thrust-pressed from the starting shaft with the propulsion machine at the head. It is possible to efficiently excavate a wide tunnel in which a subway station building is constructed by setting it at a predetermined starting position and promoting those shield machines. And, except for the starting shaft, since it is non-excavation work, construction work can be performed continuously day and night, shortening the construction period and reducing the construction cost.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below by taking as an example a case where an underground station section is constructed under a road by a rectangular shield machine. In FIG. 1, a rectangular propulsion machine 2 and a divided rectangular shield machine 3 are provided in a place avoiding a road (not shown).
a to 3d (hereinafter, referred to as shield machine 3 if no distinction is required), the largest of the rear propulsion pipes 7, and the starting shaft 1 in which the rear push wheel 6 and the original push jack 5 can be arranged. Is being built.

A plurality of rectangular shield machines 1 (two stations in the illustrated example), four rectangular shield machines 3a to 3d in the illustrated example are provided from the start shaft 1 in the direction perpendicular to the bottom of the road.
(However, in the figure, the shield machine 3 is already excavated, and the steel segment 4 following it is shown), and the rear propulsion pipe 7 is pushed out by a source push jack 5 described later.

Next, the starting method of the shield machine will be described. First, the starting shaft 1 is excavated at a place where the excavation can be performed, such as along a road, in such a size that the shield machine 3 can be arranged. Then, as shown in FIG. 2, the rectangular propulsion unit 2 is set in the starting shaft 1 in the direction perpendicular to the excavation direction (along the road) of the shield machine 3, and the push jack 5 is pushed.
To start excavation (propulsion start process).

Further, when the propulsion unit 2 is pushed out as shown in FIG. 3, the first shield unit 3a is connected to the rear side of the propulsion unit 2 and similarly pushed and pushed by the original push jack 5. Similarly, the second shield machine 3b is provided behind the first shield machine 3a, and the third shield machine 3c is provided behind it.
・ Procedures are sequentially connected to each other (propulsion machine propulsion process), and as shown in FIG. 4, the rear propulsion pipe 7 and the push wheel 6 are connected to the rear of the shield machine 3d, and each shield machine 3a- 3d is pressed and propelled to a predetermined starting position (shield machine setting process).

Then, the shield machine 3 is separated from the propulsion machine 2 and the rear propulsion pipe 7, each shield machine 3 starts tunnel excavation (shield machine starting step), and the steel segment 4 is laid.

[0012]

INDUSTRIAL APPLICABILITY The present invention is configured as described above, and the starting shaft can be excavated at a place apart from roads and rivers. In the case of excavation, it is possible to perform continuous construction work day and night without relocating the work zone by reducing lanes or working only at night. Moreover, the trial digging, relocation, and restoration work of the buried objects are almost unnecessary, and therefore, the construction period and the construction cost can be shortened.

[Brief description of drawings]

FIG. 1 is a perspective view showing a construction state of the present invention.

FIG. 2 is a sectional view illustrating a propulsion starting step.

FIG. 3 is a sectional view illustrating a propulsion unit propulsion process.

FIG. 4 is a cross-sectional view illustrating a shield machine setting step.

[Explanation of symbols]

1 ... Starting shaft 2 ... Rectangular propulsion machine 3, 3a-3d ... Rectangle shield machine 4 ... steel segment 5 ... original push jack 6 ... push ring 7 ... Rear propulsion tube

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-11-93562 (JP, A) JP-A-11-173070 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 9/06 301 E21D 9/06 311

Claims (4)

(57) [Claims] 1. A method of starting a shield machine in which a predetermined number of shield machines (3) are thrust-pressed with a thruster (2) at the head by a push jack (5) arranged in a start shaft (1). Then, after directly pushing the original push jack (5) to the propulsion unit (2) to excavate the ground for a certain distance from the starting shaft (1), the shield machine (3) is provided behind the propulsion unit (2). Is connected to the shield machine (3) and the force of the original push jack (5) is directly applied to the shield machine (3) to push it out.
a) The starting method of the shield machine is characterized by repeating the number of times. 2. A method of starting a shield machine, in which a predetermined number of shield machines (3) are thrust-pressed with a thruster (2) at the head by a push jack (5) arranged in a start shaft (1). Then, after directly pushing the original push jack (5) to the propulsion unit (2) to excavate the ground for a certain distance from the starting shaft (1), the shield machine (3) is provided behind the propulsion unit (2). Is connected to the shield machine (3) and the force of the original push jack (5) is directly applied to the shield machine (3) to push it out.
(a, ...) Repeatedly for the number of times, the rear propulsion pipe (7) is connected to the rear of the shield machine (3), and the force of the push jack (5) is directly applied to the rear propulsion pipe (7). Starting method of shield machine characterized by pushing and pushing. 3. A predetermined number of shield machines (3a, ...) Are sequentially connected behind the propulsion machine (2), and the shield machine (3d) and the start shaft (1) are closest to the start shaft (1) side. ) Is provided with a source push jack (5), a starter for a shield machine. 4. A predetermined number of shield machines (3a, ...) Are sequentially connected behind the propulsion machine (2), and rearward propulsion is provided behind the shield machine (3d) closest to the starting shaft (1) side. A starting device for a shield machine, characterized in that a pipe (7) is connected and a source push jack (5) is provided between the rear propulsion pipe (7) and the starting shaft (1).