JPS5844190A - Shield drilling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Traditionally, the excavation method in places where there is groundwater has been the manual shield method using a combination of pressure air method and chemical injection method, or the mechanized shield method using a combination of mud pressure method and mud pressure method. However, it is not only difficult to use these methods without completely loosening the ground, but also it is difficult to carry out construction without completely loosening the ground, and in areas shallower than the diameter of the seal V, there is a risk of upheaval or subsidence of the ground surface during construction. This may cause problems and make construction impossible.

The present invention was proposed with the aim of eliminating such defects and providing an improved shield excavator capable of excavating the ground without loosening it. A cylindrical rotary cutting member mounted to be movable forward and backward together with the main body, a rotary excavating disk rotatably disposed along the inner peripheral surface of the rotary cutting member, and a rotary excavating disk connected to the central axis of the disk. shield excavation comprising: a horizontal earth removal member configured to carry out excavated soil rearward; and a rotary excavation earth removal member mounted in the rotary cutting member so as to be movable forward and backward. It is related to the machine.

As described above, in the shield excavator according to the present invention, the cylindrical rotary cutting member is mounted on the front end of the shield body so as to be rotatable and movable forward and backward together with the shield body. The rotary cutting member is not rotated together with the main body of the seal 1 in advance of the phase-shifting excavation and earth removal member; [as the rotary cutting member is penetrated into the ground, the ground is cut into a cylindrical shape by the rotary cutting member, Moreover, since the cut soil is compacted and contained by the rotary cutting member, there is little effect of upheaval or subsidence of the ground surface during excavation.

In the shield excavator according to the present invention, a rotary excavator is mounted in the ground cut and supported by the cylindrical rotary cutting member so as to be able to move forward and backward with respect to the rotary cutting member. The rotary excavation disk is rotated and moved forward, and while the rotary excavation disk supports the earth pressure, the cylindrical cut soil held in the aged rotary cutting member is excavated, and the axis of the excavation disk marked Ail is excavated. Since the excavated soil is carried out backwards by the horizontal earth removal member connected to the shield, it is possible to excavate the ground without loosening the ground in the shield ml cross section.

According to the present invention, excavation can be carried out without loosening the ground with such a simple configuration, and excavation in areas with shallow overburden can be carried out without any problems, and auxiliary construction methods can be used even in areas with low groundwater pressure. It is something that can be applied to each gong.

The present invention will be described below with reference to the illustrated embodiments.

(1) is the shield body, and the shield jack (2) mounted on the ring beam is extended by taking the reaction force from the segment (3) assembled at the rear of the shield body (1). The shield body il+ can be moved forward.

(4) is a cylindrical rotary cutting member, which is rotatably mounted on the shield body +11 via a taper roller (5) mounted on the shield body +11, and a cutter (6) is attached to the front edge.
is arranged, and an inner gear fixed to the rear end meshes with the drive gear (8) of the motor (Ml) mounted on the shield body (1) to drive the motor (Ml). By rotating the rotary cutting member (4), the rotary cutting member (4) is driven to rotate.

(9) is a screw auger constituting the horizontal soil removal member, which is disposed along the central axis inside the shield body (1), and the horizontal casing (9a) of the screw auger (9) is arranged along the central axis inside the shield body (1). It is slidably inserted into the horizontal guide tube f11 attached to the ring beam of 1), and is moved forward and backward by the jack 011 disposed between the guide tube a and the horizontal casing (9a). It has become.

Note that a protruding ridge O2 extending in the axial direction is provided on the outer periphery of the horizontal casing (9a), and is slidably fitted into the slot (10a) provided in the guide tube (IIK). Rotation of the casing (9a) is prevented.

OJ is a rotary excavation disk, and a cylindrical portion 041 is integrally protruded from the center thereof, cutters (Is and cutter slits are arranged radially on the front surface of the disk (131), and the cylindrical portion (
A cutter Oe is disposed on the periphery of the cylinder 141, and a cutter Oe barrel and cutter slits are disposed radially on the disk On, which is integrally constructed in the same circle as the cylindrical portion.

The cylindrical rotary cutting part 4 (
4) Roller rolling along the inner circumferential surface of (19)
”.

The rear end is equipped with a roller surrounding that rolls around the annular part f2Llli arranged on the outer periphery of the front screw casing (9a), and the auger shaft (9) of the front screw auger (9) is mounted on the rear end. The tip of the auger shaft (9b) is fixed to the disk (17), and the auger shaft (9b) is thus mounted on the horizontal casing (9a).
9b) By driving the drive motor (M2), the disk 0 is driven to rotate together with the central cylindrical portion (14).

Note that the rotary excavation disk 0 (is formed into a hollow body, and the excavated soil taken into the hollow part through the cutter slit is taken in through the intake port (9c) provided in the horizontal casing (9a).
It can be carried into the casing (9a) through the casing (9a).

In the figure, (9d) is a soil discharge port provided at the rear end of the horizontal casing (9a), (221 is a conveyor that conveys the soil from the soil discharge port (9d) rearward, and (231 is an erector) -1 (241 is a roller interposed between the rear end of the rotary cutting member (4) and the shield body fil.

Since the shield excavator of the present invention is configured as described above, the motor (Ml) is driven Tkh, and the shield jack 0υ is extended by taking a reaction force to the segment (3), and the rotary cutting member (4) is propelled together with the shield body fil while rotating. The rotary cutting member (4) cuts the ground into a cylindrical shape with the cutter (6) on the front edge, and the cut ground is rotary cut while being consolidated by the inner tapered surface of the cutter (6). Element(
4) and held by the same member (4).

(See FIG. 2) At this time, the rotary excavation disk 13) stops driving, and the jack aυ pressurizes the ground held by the rotary cutting member (41).

Next, the motor (M2) is driven T, and the jack +Ill is driven 17 to rotate the rotary excavation disk (131).
The cylindrical part 04) provided integrally with this is rotated and propelled to excavate the cylindrical ground held by the rotary cutting disc G31, and the excavated soil is passed through the screw auger (9). Transferred to (transferred to).

The soil is transferred to the conveyor area from the soil discharge port (9d) and is taken out of the mine. Or<1. The earth held by the rotary cutting member 14) is excavated by the rotary excavation disk O3 and the cylindrical portion Q4) up to the front end of the rotary cutting member 14).

Note that at this time, the rotary cutting member (4) is stopped.

Cutting of the ground by the rotary cutting member (41).

And when the excavation of the ground held by the rotary excavation disk OJ and the Ail member (4) by the cylindrical part 0 is completed,
The shield jack (2) is retracted, a new segment (3) is assembled (see Fig. 1), and the above process is then repeated to excavate the tunnel 1°.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIGS. 1 and 2 show an example of a shield excavator according to the present invention.
FIG. 6 is a longitudinal sectional side view showing the operating state of the embodiment, and FIG. 6 is a front view thereof. +11---Shield body, +21---Shield jack, +41---One cylindrical rotary cutting member, (71---
Inner gear, F81--Drive gear, (91--Screw auger, old) -M-Jack, 03-m=Cylindrical drilling disk, n4J--Cylindrical part, (Ml) (M2) -
-One motor

Claims (1)

[Claims] (b) A cylindrical rotary cutting member rotatably mounted on the front end of the shield body so that it can move forward and backward together with the shield body, and rotatably arranged along the inner circumferential surface of the rotary cutting member. a horizontal tilling member connected to the central axis of the disc and configured to carry out soil excavated by the disc rearward; A shield excavator characterized by comprising a suspended rotary excavating and removing member.