Operating member of driving shield of oval shape

FIELD: mining.

SUBSTANCE: invention refers to mining industry, namely to driving shields, and may be used during building of highway, railway and public tunnels. Operating member of driving shield includes centre rotor working organ in the form of faceplate, working organs with rock-breaking tools on outer surface for creation of oval form of tunnel section, actuating device of working organs and traveling mechanism. In order to create oval form of tunnel section, working organs are designed as two side and two vertical working organs of drum-type. Each side working organ is designed in the form of body of revolution arranged in relation to cross centroidal principal axis of tunnel section, with bow-shaped element corresponding to arch, half of side arches and perimetres of their connection. End surfaces of vertical working organs of drum-type correspond to arch and floor arch of tunnel. Central working organ is installed by means of bearing on axis located in centre of gravity of driving shield, this axis is also operating member guide. At that side working organs and vertical working organs are installed by means of bearings on their axes rigidly cantilever connected to guide. At that each of mentioned working organs is provided with actuating device, and traveling mechanism is designed in the form of hydraulic jacks.

EFFECT: providing of driving of tunnel of optimal oval shape transverse and establishing of conditions for maximum mechanisation and automation of all operating processes during tunnel building.

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 Executive body of the tunneling shield in the form of a table [1].

The disadvantage of this Executive body is the possibility of tunneling only circular cross-section, which is not always rational, for example, the useful area of the three-lane road tunnel is 48% of the total 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 [2].

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.

The objective of the proposed invention is the provision of tunneling Optim the school oval cross-sectional shape while reducing the cost of development of the breed, as well as creating conditions for maximum mechanization and automation of all production processes in the construction of the tunnel.

This is achieved by the fact that the Executive authority of the tunnel shield includes a Central rotary working body in the form of a table, working bodies to obtain an oval-shaped cross-section of the tunnel, made in the form of two lateral and two vertical working bodies of the drum type, with each side working the body in the form of bodies of rotation, positioned relative to the horizontal Central axis of the cross section of the tunnel with a curved generatrix corresponding to the arch, half of the lateral arches and circles their mates, and the end surface of the vertical working bodies of the drum-type correspond to the arch and back to the arch of the tunnel with rock-forming tools on the external surfaces of the Central working body installed by a bearing on an axis located at the center of gravity of the tunnel shield, which is also the guide of the Executive body, and lateral attachments and vertical working bodies established by bearings on their axes associated cantilever rigidly with the rail, with each of these working bodies has the drive and the transfer mechanism made in the form of hydraulic d is Kratov.

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 of the working 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 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 importance, as this can lead to marriage. For example, a road tunnel with multi-lane vehicles oval cross-sectional shape should be elongated along the horizontal axis while keeping the dimension of the approximation of the structure throughout its length. To comply with this what about the conditions necessary to:

- the width of the traffic lanes was 4 m;

- tall size was 5 m;

- the sidewalks of 1 m and 0.75 m;

- when turning the tunnel roadway had the inclination, etc.

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 lateral element of the working body TBM.

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

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, half of the lateral arches and circles their mates, 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 rock working the 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, which allows the penetration in difficult hydrogeological conditions with rock or suspension of the counterweight to the slaughter.

The shield case may be hinged (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.

The Central rotary working body 1 is mounted by a bearing on an axis located at the center of gravity of the tunnel shield, which is also directing the Executive of the working body, attachments 2, 3, 4 and 5 (see figure 1, 2, 3, 4) are mounted through bearings on their axes associated cantilever rigidly with a guide on each of the two bearings 10 (figure 5), an inner diameter of about two meters, which allows service personnel through the bearing is free to get into the working parts. 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 carried is of asterisk 12 drive mounted on the fixed axis and consisting of a reduction gear 13 and an electric or hydraulic motor (axis of the working body is 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 (not shown) on the guide rail 15;

by shifting the entire panel of the complex (TBM) with repulsion from the tunnel lining 16 flush jacks 17 or from the second section of the shield, repertoi in the surrounding mountain grapelli when the hinge body of the shield.

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 14 (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 by, on the one hand, issuing breed screw loader, on the other hand, a corresponding shifting of the shield on the bottom.

When hydroprogne for hermetic diaphragm is transported through pipes solution bentonite gli is s and the 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 trucks is disposed at the dump.

Sources of information

1. Vpoll, Senyukov, Anemoscope, Vghhmaow. "Tunnels and subways". Moscow, "Transport", 1975.

2. Wpimeuoj, Usimamizi. "The latest Japanese technology shield tunneling".

The Executive body of the tunneling machine, comprising a Central rotary working body in the form of a table, working bodies with rock cutting tools on the outer surface for receiving the oval cross section of the tunnel, the drive of the working bodies and the transfer mechanism, characterized in that the working bodies to obtain an oval-shaped cross-section of the tunnel is made in the form of two lateral and two vertical working bodies of the drum type, with each side working the body in the form of bodies of rotation, positioned relative to the horizontal Central axis of the cross section of the tunnel with a curved generatrix corresponding to the arch, half of the lateral arches and circles them the interface is, and the end surface of the vertical working bodies of the drum-type correspond to the arch and back to the arch of the tunnel, the Central working body established by a bearing on an axis located at the center of gravity of the tunnel shield, which is also the guide of the Executive body, and lateral attachments and vertical working bodies established by bearings on their axes associated cantilever rigidly with the rail, with each of these working bodies has the drive and the transfer mechanism is made in the form of hydraulic jacks.



 

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