JPH0749750B2 - Auger side excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION “Industrial field of application” The present invention is directed to the unconsolidated ground such as sandy soil, cohesive soil or silt, slopes, tunnel face, etc. Alternatively, the present invention relates to an auger side excavator capable of continuously excavating in a slit shape in the vertical direction.

"Conventional technology" When excavating slopes of unconsolidated ground such as sandy soil and silt or tunnel face, collapse of face and subsidence of the ground surface are likely to occur. For this reason, prior to tunnel excavation, a number of holes are excavated with an auger, trencher, etc., with the positions slightly shifted to form slit-shaped excavation grooves extending in the tunnel transverse direction and the longitudinal direction around the tunnel arch portion. Then, there is known a construction method in which a quick-hardening concrete is placed in a slit-shaped excavation groove and construction is performed while constructing a thin-wall concrete arch shell for reinforcement.

"Problems to be solved by the invention" As in the conventional example, when excavating a tunnel face while constructing a thin concrete arch shell, since there is no machine that can excavate thinly in a slit shape, a large number of holes in a trencher, etc. There was a problem that the work efficiency was low and the trencher could not excavate a depth of 2 m or more. Further, in the slit-shaped excavation groove having a large number of continuous holes, the inner surface of the groove becomes uneven, and the thickness of the thin-walled concrete shell becomes uneven, so that rapid hardening concrete cannot be effectively used.

Therefore, in order to easily construct a slit-shaped excavation groove, the present invention makes it possible to move an auger that has been vertically excavated and pushed into a tunnel face, etc., while being horizontally, vertically or diagonally excavated. Provide an excavator.

"Means for Solving the Problem" The present invention is an auger side face excavator capable of constructing a slit-shaped excavation groove by moving a screw auger in a direction perpendicular to the pushing direction, for example, traveling The boom was attached to the workbench of the heavy equipment, and the guide frame was attached to the tip of the boom to hold the screw auger with a bit. The screw auger can be rotated by a motor and can be pushed along a guide frame by a jack, and a pushing portion is provided at the tip of the guide frame so as to be held in contact with a tunnel face or the like.

In addition, the boom is configured to be capable of expanding and contracting in the vertical direction, a swinging device for swinging the boom in a vertical plane is provided at the base of the boom, and the boom tip is moved in the vertical direction, the horizontal direction, or an arbitrary direction by a screw. The auger is also designed to move.

[Operation] When constructing a slit-shaped excavation groove in a tunnel face using the auger side excavator of the above means, first, while rotating the screw auger with a bit, push it into the natural ground with a jack, and make a vertical direction to the tunnel face. To drill a hole. After the screw auger finishes the drilling of the specified length, while rotating the screw auger while pushing it into the natural ground, while rotating the boom on the vertical plane with its swing device, the boom is extended (contracted). Then, the screw auger is moved in a direction perpendicular to the pushing direction, and a slit-shaped excavation groove is formed along the arch of the tunnel. When the work range of the boom is exceeded, the traveling heavy equipment can be moved to construct a slit-shaped excavation groove over a wide range.

After that, if a quick-hardening concrete is placed in the slit-shaped excavation groove, a thin concrete arch shell is constructed, and excavation of the tunnel face can be performed safely and efficiently.

[Example] An example of the present invention will be described with reference to Figs. The workbench 1a of the traveling heavy machine 1 is capable of turning on a horizontal plane, and the base of the boom 3 is attached to the workbench 1a via a turning device 2. The boom 3 is configured to be extendable / contractible by a hydraulic cylinder (not shown), and the boom can be swung in an arcuate lateral direction on a vertical plane by a turning device 2 provided at the base of the boom. The turning device 2 is driven by a hydraulic motor (not shown).

At the tip of the boom 3, a rail-shaped guide frame 4 projecting forward of the heavy machine is swingably supported, and the guide frame 4 is operated by a jack 5 attached to the tip of the boom 3. . A screw auger 6 is slidably held on the upper surface of the guide frame 4, and the base of the screw auger 6 is pushed along the guide frame 4 by a hydraulic jack 7 attached to the guide frame 4. The screw auger 6 is
It is adapted to be rotationally driven by a hydraulic motor 8 provided at the base thereof. A bit 9 is attached to the screw portion of the screw auger 6 except for the rear end portion thereof, which facilitates excavation.

The tip of the guide frame 4 is provided with a pressing portion 10 for contacting a facet of a tunnel or the like.
The screw auger 6 is brought into contact with the tunnel face when the swivel device 2 swivels or the boom 3 expands and contracts to move the screw auger 6 horizontally or vertically.
The rotation or movement of is stable.

[Advantages of the Invention] The auger side excavator of the present invention can move a screw auger with a bit horizontally, vertically or in any direction (vertical direction to the pushing direction of the screw auger). It is possible to easily excavate the slit-shaped excavation groove with a substantially uniform width. If the excavation width is changed to one with a different screw auger outer diameter, the excavation width can be easily changed, and it is also possible to construct a slit-shaped excavation groove having a depth of 2 m or more.

[Brief description of drawings]

FIG. 1 is a side view of an auger side excavator of the present invention, FIG. 2 is a front view of the excavator, and FIG. 3 is a side view of a screw auger. 2; swivel device, 3; boom 4, guide frame, 6; screw auger 7; jack, 8; motor 10; pressing part

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hirokazu Kami 4-6-15 Sendagaya, Shibuya-ku, Tokyo Within Fujita Industry Co., Ltd. (72) Yoichi Mimura 4-6-115 Sendagaya, Shibuya-ku, Tokyo Fujita Industry Co., Ltd. (56) Reference JP-A-63-83390 (JP, A) JP-A-57-133935 (JP, A) JP-A-62-197598 (JP, A) JP-B-57-2880 (JP, B2)

Claims (1)

[Claims] 1. An auger side excavator capable of constructing a slit-shaped excavation groove by moving a screw auger in a direction at right angles to the pushing direction, the swivel rotating on a vertical plane on a workbench. A device is provided, the base of the boom is attached to the swivel device to enable the boom to swivel, a guide frame is swingably provided at the tip of the boom, and the guide frame holds a screw auger with a bit rotated by a motor. At the same time, the screw auger can be pushed by the jack along the guide frame,
An auger side surface excavator, which is provided with a pressing portion at the tip of the guide frame for holding the guide frame in contact with a tunnel face or the like.