Oval telescopic actuator of tunnel shield

FIELD: mining.

SUBSTANCE: actuator of a tunnel shield with oval shape comprises a central rotor tool, two horizontal side tools and two vertical drum tools. The actuator is telescopically connected to a shield shell along centres of rotation of side and vertical tools, and also via a square opening in a tight partition along the centre of gravity with oval section and a square guide passing through it.

EFFECT: invention provides for correction of shield shell position and position of tunnel section as direction of tools rotation changes.

5 dwg

 

The present invention relates to the mining industry, namely the tunneling shields, and can be used in tunneling transport and utility of rational - oval - shaped cross-section.

Known rotary-planetary Executive body of the tunneling shield, allowing you to develop the bottom of the oval cross-sectional shape that includes a centrally located rotary element of the faceplate and the planetary mechanism consisting of three swivel arms, each of which is equipped with a rotary cutting head which provides the extension section from round to oval [1]. The disadvantage of this device is its complexity, it is not in contact with the bottom throughout its surface, which adversely affects the stability of the face, and this rotary-planetary work body does not allow stable to maintain its position during the shifting of the panel of the complex.

Also known Executive body of the tunnel shield is oval in shape and includes a Central rotor, two horizontal sides and two vertical drum work body [2]. The disadvantages of this device is that it is not connected telescopically with shell shield, so when you rotate the Executive body around the longitudinal axis passing through the center of gravity of the cross section by changing n the Board of rotation of the working bodies, shell shield does not turn.

The technical result of the invention is the provision of adjusting the position of the enclosure, and hence the position of the cross section of the tunnel in the direction of rotation of the working bodies.

This is achieved by the fact that the Executive authority of the tunnel shield oval telescopically connected with the shell of the shield at the centers of rotation of the lateral and vertical working bodies, as well as through the square hole in the airtight partition through the center of gravity of the oval cross section and telescopically passing through her square guide.

The device illustrated by the drawings.

Figure 1 shows the TBM (tunnel boring machine powered system) proposed by the Executive body.

Figure 2 shows views of the Executive body of the TBM from a face.

Figure 3 shows one working body of the drum type TBM.

Figure 4 shows a side working body of TBM.

Figure 5 shows a longitudinal section of the side of the working body.

The Executive body of the tunneling shield consists of a Central rotor of the working body in the form of the faceplate 1 and the two side working bodies 2 and 3, each of which is made in the form of a body of rotation about the horizontal Central axis of the cross section of the tunnel curved generatrix corresponding to the arch, on which the barn lateral arches and circles pairing them two vertical 4 and 5 of the working bodies of the drum type, the end faces of which correspond to the arch and back to the arch of the tunnel, the actuators of each of the working body are inside that allows them to service and repair. On the outer surface of the working bodies of the fixed Portorosa tools: milling cutter 6, the cutters 7 and scrapers 8 (see figure 1, 2, 3, 4). When drilling in hard rocks of the working bodies equipped with milling cutters and scrapers, in the rocks of medium strength - cutters and scrapers, and in weak rocks scrapers. The Executive body of the tunneling shield is separated hermetic diaphragm 9 (partition)that allows tunneling in complex hydrogeological conditions with rock or suspension of the counterweight to the slaughter.

Shield case can be articulated (figure 1 conventionally not shown)that increases the rate of penetration by 25-30% due to the continuous development of the breed without stopping for the installation of the lining and (optionally) allows you to place the tunnel on curved sections with radii of curvature less than 100 meters.

Central, rotary working body 1, is installed through the bearing on the axle, made in the form of a pipe with a diameter up to 2 m and is located in the center of gravity of the tunneling shield, which is also directing the Executive body of the TBM, working bodies 2, 3, 4 and 5 (smpeg, 2, 3, 4) are mounted through bearings on their axes associated cantilever rigidly to the guide, each on two bearings 10 (figure 5), an inner diameter of about two meters, which allows service personnel through the bearing to get inside the working bodies. The drive of each of the working body can be hydraulic or electric terresteris control according to the following scheme: the toothed rack 11, is fixed to the inner surface of the working body, it is engaged by the sprocket 12 of the actuator, mounted on a fixed axis and consisting of a reduction gear 13 and 14 electric or hydraulic motors (figure 4 and 5 axis working body conventionally not shown).

The move of the Executive body on the face can be done in two ways:

by the impact of hydraulic jacks Executive body 15 per square guide rail 16 (1);

by shifting the entire panel of the complex (TBM), building on the tunnel lining panel jacks 17 or from the second section of the shield, repertoi in the surrounding mountain grapelli when the hinge body shield (not shown conventionally).

We offer Executive body of the shield also allows you to influence the position of the oval cross section of the tunnel when the shifting of the panel of the complex by changing the direction of rotation RA is ocij bodies. It should be noted here that all mechanized shields have a tendency to spin when shifting relative to its longitudinal axis due to various reasons, among which may be called the force of gravity, the center of gravity along the longitudinal axis of the shield as a result of defects in design and manufacture, as a result of the slaughter at the simultaneous development of a working body and other

When tunneling round cross-sectional shape that does not have a decisive influence on the construction of the tunnel, because when you rotate the shield around its longitudinal axis of the shell, which is going to the next ring, remains round.

When tunneling oval cross-sectional shape that is elongated relative to the horizontal (vertical) axis, the stable position of the cross section of the tunnel is of crucial significance. In addition, the roadway of a road tunnel with multi-lane vehicles oval cross-sectional shape should be horizontal when the straight road and have a slope in the turn of her to resist the forces of inertia in the movement of cars on the turn.

The Executive body of the tunneling shield oval telescopically connected with the shell of the shield at the centers of rotation of the lateral and vertical working bodies, as well as through the square the hole (conventionally not shown) in a sealed diaphragm (septum) 9 through the center of gravity of the oval cross section and telescopically passing through her square guide rail 16.

The Executive body of the tunneling machine operates as follows.

At the same time drives all working bodies, then served the Executive body of the downhole hydraulic jacks 15 (figure 1).

And when rock weights destroyed breed in the working area between the bottom and the hermetic diaphragm plastification special Gidrodinamika served in the required amount in the working area dispersed throughout its volume. The pressure of the weights is continuously monitored and maintained at hydrodiuril slaughter through from one side of the issuance of the breed screw conveyor 20, on the other hand a corresponding shifting of the shield on the bottom.

When hydroprogne for hermetic diaphragm is transported through pipes solution of bentonite clay and compressed air, which provide the necessary counterweight to the slaughter in unstable rocks. When this liquid mixture of destroyed rock and bentonite clay is thrown to the surface by pumps through pipes, where the produce Department of bentonite clay and water from the rock. After this, the solution bentonite clay is fed into the working zone through the pipes for reuse, and rock dump trucks and transported to storage.

When turning the multi-lane highway tunnel it is necessary to provide the rotation panel of the complex along the longitudinal axis defined on the first corner to the left or right, in order to ensure the slope of the road surface. This can be done by changing the direction of rotation of five working organs that make up the Executive body of the tunnel complex when it is shifting. If necessary, change the position of the oval cross section of the tunnel from horizontal to vertical can also be done with the shield advancing, changing the direction of rotation of its elements (working bodies). In this invention the Executive body telescopically connected with the shell of the shield, which is especially important for sewer tunnels.

The Executive body of the TBM consists of five working organs: Central 1 in the form of a faceplate, which rotates on a bearing fixed inside the round (in the form of a pipe guide, and guide changes the cross section by the square at the intersection of it with the aperture, and two lateral 2, 3 and two vertical 4, 5 working bodies. All these four working body on the axis of rotation have the same cylindrical protrusions 18 (figure 3). These protrusions are telescopically in the channel 19, is rigidly connected with the shell shield. Thus, the shield advancing while developing face with the corresponding direction of rotation of Executive bodies 1, 2, 3, 4, 5 rotate the oval enclosure at a certain angle when it is shifting and, with edutella, on the same corner of the tunnel lining collected on it.

Sources of information

1. Wpimeuoj, Usimamizi "Latest Japanese technology shield tunneling".

2. RF patent №2376473 classes 21D 9/087 and AS 27/24, 2008

The Executive body of the tunnel shield is oval in shape and includes a Central rotor, two horizontal sides and two vertical drum working body, characterized in that it is telescopically connected with the shell of the shield at the centers of rotation of the lateral and vertical working bodies, as well as through the square hole in the airtight partition through the center of gravity of the oval cross section and telescopically passing through her square guide.



 

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