JPH0274794A - Tunnel excavator - Google Patents

Abstract

PURPOSE:To make it possible to perform soil discharging work easily and efficiently on loading excavated muck nearly completely by providing a soil discharging plate on an excavator basic body at the working face side top end, and forming the soil discharging plate on a top end apron in bend along an excavation cross section. CONSTITUTION:A moving device 2 is composed of a base 4 made to ground on a bottom lining surface 3 and a shassis 6 loaded with an excavator basic body. A soil discharging plate 13 provided on the shassis 6 at the working face side top end is detachably attached with a top end apron 15 formed in bend along an excavation cross section to the basic body member 14 thereof at the top end 14a. If this tunnel excavator is used, discharge efficiency for excavated muck can be improved, again lining space after excavation can be secured easily by separating the top end apron from the basic body member.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a tunnel excavator used for excavating underground, underground, etc.

"Prior Art" Generally, in tunnel excavators such as free-section excavators, a gathering method is used for loading and rearward transportation of each excavation.

In this gathering method, a soil removal plate is installed at the tip of the excavator's face side, and the shear after excavation is temporarily loaded, and this is transported and discharged to the rear of the excavator using a belt conveyor, etc. It has become.

``Problems to be Solved by the Invention'' However, in the above-mentioned gathering method, when the inner peripheral surface of the excavation shaft is lined with concrete after excavating the earth and sand at the face, the tunnel installed on the lining surface of the excavation shaft There is a step equal to the thickness of the lining between the height of the installation surface of the excavator and the height of the excavation shear removal surface (i.e., the position of the excavation cross section). If only the soil removal plate was used, excavation debris equivalent to the thickness of the lining remained, and the remaining excavation debris had to be removed manually. In addition, since the earth removal plate is not formed along the excavation cross section, the excavation shear leaks backward from the left and right sides of the earth removal plate, resulting in poor work efficiency and soil removal efficiency. Ta.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tunnel excavator that can easily and efficiently carry out shearing work.

``Means for Solving the Problems'' This invention provides an earth removal plate at the face-side tip of the excavator body for loading excavated shears to the rear, and this earth removal plate can be attached to and detached from the main body. The tip apron is provided with a tip apron to be attached, and the tip apron is curved along the excavation cross section.

"Function" According to the tunnel excavator according to the present invention, the tip apron is curved along the excavation cross section to almost completely scoop up excavation slag and ship it to the rear of the excavator main body. By leaving the apron on the face, a lining space is created in the area where the excavated soil is removed.

Embodiment FIGS. 1 to 4 show an embodiment of the present invention. In these figures, reference numeral 1 is an excavator main body, reference numeral 2 is a moving device that carries the excavator main body l and moves it along the excavation direction. This is the main component of the machine.

The moving device 2 is configured to move t to the lower lining surface 3 of the excavation shaft T.
The chassis 6 is mainly composed of a base 4 that is placed on the ground, and a chassis 6 that is supported by the base 4 via a guide wheel 5 so as to be slidable horizontally and longitudinally, and on which the excavator main body l is mounted on the upper surface 6a. A cylinder mechanism 7 is provided between the base 4 and the chassis 6 and the lower lining 3 of the excavation shaft T for alternately advancing or retracting them along the excavation direction of the excavation shaft T. When the base 4 is moved forward or backward, when the chassis 6 is pushed up and supported from the lower lining surface 3 of the excavation shaft T, a push-up mechanism 8 is provided which levitates the base 4.

The cylinder mechanism 7 includes a pair of propulsion cylinders 9°9 (
(only one is shown in FIG. 1), and this propulsion cylinder 9 consists of a cylinder body 10 and a cylinder body 10
The rear end 10a of the cylinder body 10 is connected to the base 4, and the tip 11a of the telescopic rod 11 is connected to the chassis 6. Chassis 6 and base 4
Relative movement is possible in the direction of separating them from each other or in the direction of bringing them closer to each other.

The push-up mechanism 8 includes a pair of skis 12.12 whose upper ends are pivotally supported on the lower surface of the chassis 6 and whose lower ends have a contact surface 12a with the lower lining surface 3 of the excavation shaft T;
It is composed of a pair of telescoping jacks (not shown) whose ends are connected to the other end of the ski 12 and the lower surface of the chassis 6, and each telescoping jack is extended to lower each ski 12. By pressing the lining surface 3 to ground 1, the reaction force is used to push up the chassis 6 and the base 4.
It is something that makes you levitate.

In the tunnel excavator having such a configuration, an earth removal plate 13, which is a feature of the present invention, is provided at the end of the face side of the chassis 6.

This earth removal plate 13 is for collecting excavated debris, loading it rearward, and transporting it, and its tip 14a is curved so as to almost follow the lower lining surface 3 of the excavation shaft T, and its inner surface is semicircular. a semi-cylindrical tip apron 1 which is removably attached to the tip 14a of the main body 14 and is curved along the cross section of the excavation shaft T.
It is composed of 5. At approximately the center of the interior of the main body 14, a pick-up loading device 17 is provided with a belt conveyor 16 for transporting and discharging the excavated waste to the rear.
is located.

If the means for attaching the main body 14 of the earth removal plate 13 and the tip apron 15 is, for example, a tenon joint, they can be joined with one touch when moving forward, and can be easily separated without any resistance when moving backward.

Next, a method for discharging excavation waste using the tunnel excavator configured as described above will be explained according to the excavation work of the excavation shaft T.

In the state shown in FIG. 1, the base 4 and the main body 14 of the earth removal plate 13 are grounded on the lower lining surface 3 of the excavation shaft T, the base 3 supports the weight of the machine and the excavation reaction force, and the earth removal plate 13 The tip apron 15 is pressed into the face of the mountain to be excavated. From this state, without excavating the earth and sand at the face, the cylinder mechanism 7 is driven to advance the shovel 6 and gradually advance the earth removal plate 13 to the position shown in FIG. 3. At this time, the excavation stubs produced by the excavation are substantially collected by the tip apron 15 moving forward along the excavation cross section and the main body 14 behind it, and then transported and discharged rearward by the shear loading device 16.

When the excavation and displacement of the excavation shaft T for a predetermined distance is completed, as shown in FIG. lining surface 3. and,
Concrete is sprayed onto the inner peripheral surface of the excavation shaft T in the lining space thus formed to form the lining surface 3.

Next, the chassis 6 is advanced to attach the tip 14a of the main body 14 of the earth plate 13 to the rear end of the tip apron 15 in the face, and the base 4 is advanced to the newly formed lower lining surface 3. When grounded, the state will be as shown in FIG.

After that, the excavation hole 'r can be dug by repeating the above procedure.

According to this embodiment, the following excellent effects are achieved.

■The tip apron 15, which is curved along the excavation cross section, can be separated from the main body 14 of the earth removal plate 13, so that only the main body 14 is retreated to the lining surface 3, leaving the tip apron 15 in the face. Therefore, the lining space can be easily secured, and the problem that the entire earth removal plate 13 cannot be accommodated within the rear lining surface 3 which is narrower than the excavation cross section can be solved.

(2) By curving the tip apron 15 along the excavation cross section, the problem of the excavation shear flowing backward from the left and right sides of the earth removal plate 13 is eliminated, and the efficiency of excavation shear discharge can be improved. In addition, since no excavation sludge is left due to the thickness dimension of the lower lining surface 3, there is no need for manual soil removal work, and it is suitable for automatic excavation using a computer or the like, improving work efficiency. Can be done.

"Effects of the Invention" As explained in detail above, according to the tunnel excavator of the present invention, an earth removal plate is provided at the tip of the face side of the excavator body for loading excavated debris rearward. Since the structure includes a main body and a tip apron that is detachably attached to the main body, and the tip apron is curved along the excavation cross section, excavated shear can be almost completely loaded and removed. Upper work can be done easily and efficiently. In addition, by separating the tip apron from the main body,
Lining space after excavation can be easily secured.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention. Figure 1 is a configuration diagram showing a tunnel excavator installed in an excavation shaft, and Figure 2 is an arrow 1-1 in Figure 1. The perspective view, FIG. 3, and FIG. 4 are shown to explain the procedure for removing earth from excavation debris, and each is a configuration diagram showing a state in which a tunnel excavator is installed in an excavation shaft. ! ... Excavator main body, 3 ... Lower lining surface, 13 ... Earth removal plate, 14 ... Main body, 15 ... Tip apron.

Claims (1)

[Claims] An earth removal plate for loading excavation shears rearward is provided at the tip of the face side of the excavator body, and this earth removal plate includes a main body and a tip apron that is detachably attached to the main body, and A tunnel excavator characterized in that the apron is curved along the excavation cross section.