JP2001065289A - Structure of shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute borng work even in the soft ground with easily loosening earth and sand without influence on the surrounding by arranging earth/sand retaining plates on both side surfaces of a shield machine, and almost vertically constituting these plates so as to be positioned higher than the ground surface. SOLUTION: Earth/sand retaining plates 2 are arranged around the shield machine. These earth/sand retaining plates are installed on front both side surfaces of the shield machine, both side surfaces of a cylinder body and rear both side surfaces. An angle for installing the earth/sand retaining plates 2 is set almost vertically, and the upper end is constituted to be positioned higher than the ground surface for advancing the shield machine. Thus, since the earth/ sand retaining plates 2 are projected forward in the advancing direction of the shield machine 1, a loosening range of front earth and sand can be restricted, and a lateral extension can be checked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a shield machine.

[0002]

[Problems to be Solved by the Invention] There are the following problems when a shield tunnel is constructed in a state with little earth covering or in a soft ground.

<A> As shown in FIG. 4, earth and sand b in front of the shield excavator a in the excavation direction is loosened, and the earth and sand b on the left and right sides are attracted to exert an influence over a wide range. <B> When backfilling the segment after passing through the shield machine a, the backfill soil flows right and left and diffuses, and it is difficult to backfill a predetermined position. Therefore, an appropriate load may not be applied to the shield tunnel. <C> After passing through the shield excavator a, the left and right earth and sand may be loosened and the surrounding earth and sand may be attracted to affect a wide area.

[0004]

The object of the present invention is to solve the above-mentioned conventional problems, and to perform construction without affecting the surroundings even in the case of construction on soft ground where the earth and sand is easy to loosen or on the water bottom. It is an object of the present invention to provide a structure of a shield machine that can be used.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a shield machine according to the present invention has a structure in which a jack is provided in a horizontal direction inside a cylindrical body, and segments are assembled behind the cylindrical body. In the shield tunneling machine which constructs a shield tunnel and propulses by taking a reaction force in this shield tunnel, the soil excavation plates are provided on both front sides of the shield tunneling machine, both sides of the cylindrical body part, both sides on the rear side, The sediment blocking plate is installed so that it is positioned almost vertically at the time of construction, and the upper end of the sediment blocking plate is located at a height higher than the ground surface promoted by the shield excavator. It is what it was.

[0006]

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

<A> Shield machine The main body of the shield machine 1 is provided with a jack in a horizontal direction inside a cylindrical body, and assembles segments behind the cylindrical body to form a shield tunnel 12.
This device is basically the same as the conventional device, which is propelled by taking a reaction force to 2. The shield machine 1 is provided with a cutter 11 on the front side, and excavates earth and sand with the cutter 11 and discharges the earth backward.

<B> Earth and sand blocking plate 2. In the shield machine 1 as described above, a sediment blocking plate 2 is provided around the shield machine 1. The earth and sand prevention plate 2 is attached to both front side surfaces of the shield machine 1, both side surfaces of the cylindrical body, and both rear side surfaces. By being attached to both sides in front of the shield machine, the earth and sand prevention plates 2 project forward from the cutter 11 on both sides thereof. The angle at which the earth and sand prevention plate 2 is attached is such that the shield excavator 1 is attached at a substantially vertical position when the shield machine 1 is installed. The upper end of the earth and sand prevention plate 2 is configured to be located at a position higher than the ground surface propelled by the shield machine 1.

<C> A slide of the earth and sand prevention plate 2. The sediment blocking plates 2 provided on both the front and rear sides of the shield machine 1 may be configured to be housed in the cylindrical body of the shield machine 1. If it does so, the earth and sand prevention board 2 can be taken in and out according to the property of the surrounding earth and sand, and a projecting distance can be corrected and construction can be performed under optimal conditions.

<D> Installation of a weight tank. A tank capable of storing water as weight can be provided on the upper part of the cylindrical body of the shield machine 1. This tank is a sediment blocking plate 2 provided on both sides of the cylindrical body of the shield machine 1.
And a transverse plate provided in the transverse direction between the earth and sand blocking plates 2 on both sides can be used. By injecting water or the like as a weight into the space surrounded by the sediment blocking plates 2 on both sides and the transverse plates on both sides, it can be used as resistance against the floating of the shield machine 1. Furthermore, if the inside of the tank is divided into a plurality of parts and the position of the water to be injected is changed, rolling and pitching of the shield machine 1 can be countered.

<E> Construction of tunnel. For example, when constructing a shield tunnel 12 at the bottom of the water,
The shield machine 1 according to the present invention is provided with a sediment blocking plate 2 which is directed forward before excavation of soil by rotation and swinging of a cutter 11.
Penetrates into the ground. Therefore, the influence of the excavation direction on the left and right earth and sand can be prevented. Even after the shield machine 1 has passed, it is possible to prevent the earth and sand from flowing into the cylinder body on the left and right sides of the cylinder body by the blocking plate, so that the left and right earth and sand are not loosened. The shield tunnel 12 is constructed backward as the digging progresses, and the upper part is backfilled with earth and sand. In that case shield excavator 1
The earth and sand blocking plate 2 also protrudes rearward, so that backfilled earth and sand does not flow out and diffuse around, and the earth and sand is placed on a predetermined position of the shield tunnel 12 as required. Can be stacked.

[0012]

As described above, the structure of the shield machine according to the present invention has the following effects. <A> A sediment blocking plate 2 is provided so as to project forward in the direction in which the shield machine 1 excavates. Therefore, the slack range of the earth and sand in front can be restricted, and the spread to the left and right can be prevented. <B> The movement of the earth and sand around the cylindrical body of the shield machine 1 is prevented, and the earth and sand do not flow. <C> Since the backfilling earth and sand can also restrain the backfilling area by the blocking plate, the required predetermined position can be backfilled without the backfilling soil escaping to the surroundings. <D> If the projecting distance is adjusted by inserting and removing the earth and sand blocking plate 2 according to the properties of the surrounding earth and sand, construction can be performed under optimum conditions.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of a structure of a shield machine according to the present invention.

FIG. 2 is an explanatory diagram of another embodiment.

FIG. 3 is an explanatory view of a construction state.

FIG. 4 is an explanatory diagram showing a construction state of a conventional shield machine on soft ground.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshimi Ino 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Nobuaki Kobayashi 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation F term (reference) 2D054 AA10 AC16 2D055 AA08 BA01 BB01

Claims (3)

[Claims] 1. A jack is provided in a horizontal direction inside a cylindrical body,
The shield tunnel is constructed by assembling the segments behind the cylinder and constructing a shield tunnel by propelling by taking a reaction force to this shield tunnel. In the shield excavator, both sides in front of the shield excavator, both sides of the cylinder, and both sides in the rear The earth and sand prevention plate was installed on the surface, and this earth and sand prevention plate was provided so as to be located almost vertically at the time of construction, and the upper end of the earth and sand prevention plate was configured to be at a height higher than the ground surface promoted by the shield excavator The structure of the shield machine. 2. The structure of a shield machine according to claim 1, wherein the sediment blocking plate is configured to be housed in the cylindrical side of the shield machine. 3. The tank according to claim 1, wherein a tank capable of storing water as a weight is provided at an upper portion of the cylindrical body of the shield machine.
Structure of shield machine