Tunnel shield

 

(57) Abstract:

The invention relates to underground construction, in particular for the construction of tunnels using the tunnel shields with a sliding formwork, and can be used in the construction of underground structures from monolithic extruded concrete. The objective of the invention is to improve the operational reliability and quality of the lining of underground structures. Tunnel shield includes a housing forming a section of the casing connected to the housing of the shield, transition sections of the casing and the supporting section. The end surface of the transition sections and the supporting sections are spherical with the possibility of rotation on the surface of a sphere with the axis of rotation on the longitudinal axis of the shield. The node connecting the sections of the casing is made in the form of a flexible cable, zapakowanego in roller blocks and secured with the possibility to adjust its tension. One group of roller units mounted on the inner surface of the forming section, and the other on the inner surface of the supporting section connected between a common zapasovany flexible cable. Each transition section and the supporting section is made integral in the radial direction and the s on the inner surface of each section. 5 Il.

The invention relates to underground construction, in particular for the construction of tunnels using the tunnel shields with a sliding formwork, and can be used in the construction of underground structures from monolithic extruded concrete.

Famous shield with sliding formwork for the construction of the lining of tunnels containing the forming section, is rigidly connected with the shield, and through the transition section connected with the supporting sections with bending in the vertical and horizontal planes.with. The USSR 334359, CL E 21 D 11/10 from 1970).

The disadvantage of this design is the low possibility of maneuvering the forming section of the casing relative to the transition section and the low reliability of the design, due to the fact that it is possible jamming of the pressing ring and the tail of the enclosure.

The closest technical solution with respect to the proposed combination of essential characteristics is a tunneling shield, comprising a housing forming a section of the casing connected to the housing, transitional sections of the formwork and support section, while the end surface of the transition section and the supporting section is rodolniy axis of the shield, the node connecting the sections of the casing in the form of a flexible cable, zapakowanego in roller blocks and secured with the possibility to adjust its tension. C. the USSR 935622, CL E 21 D 11/00 from 15.06.1982 year).

The disadvantage of this device is that the roller blocks are located at the transition sections of the formwork elements and tensioning a flexible cable secured to each of them, making it difficult adjustment and tension control between the partitions into one effort. This may result in the disclosure of the junction of the least covered of the connection node, leading to leaking of concrete mix into the open space and, consequently, to the damage of the device and the deterioration of the tunnel lining.

Task to be solved by the claimed invention is directed, is to improve the reliability and quality of the lining of underground structures.

The problem is solved due to the fact that in the tunneling shield, comprising a housing forming a section of the casing connected to the housing of the shield, transition sections of the casing and the supporting section, the end surface of the transition sections and the supporting sections are spherical with the possibility of rotation of these sections on the surface of SPEA in roller blocks and secured with the possibility to adjust its tension, roller units mounted on the inner surface of the forming section and the inner surface of the supporting section and are connected by a common zapasovany flexible cable, each transition section and the supporting section is made integral in the radial direction of the segments, between which there is trapezoidal wedges, Rethimno attached via elastic elements on the inner surface of each section.

The analysis of the prior art, including searching by the patent and scientific and technical information sources, has allowed to establish that the applicant is not detected similar, characterized by the signs of the claimed invention set forth in the claims.

In Fig.1 presents a General view of the tunneling shield.

In Fig.2 - section A-a and B-B in Fig.1.

In Fig.3 - callout In Fig.1.

In Fig.4 - section G-G in Fig.2.

In Fig.5 - callout D in Fig.2.

Tunnel shield includes a housing 1, a press ring 2 forming section 3 forms, transitional 4 sections of the casing, the end surface 5 of each of which are spherical supporting section 6, the end surface of which side of the transition with the matured roller units 7, connected between a common zapasovany flexible cable 8, the ends of which are secured under tension wire 9 made in the form of a threaded mechanism 10 located in the bracket 11. Each transition section 4 and the supporting section 6 is made integral in the radial direction of the segments 12 and 13, between which are trapezoidal wedges 14, secured to the inner surface of the segments 12 and 13 by means of bolt connections 15 through elastic elements 16.

Tunnel shield works as follows.

After placing the concrete mixture of the press ring 2 is carried out by pressing with a simultaneous movement of the shield on the bottom. In the process of moving the shield when changing direction of movement of the forming section 3, connected with the housing 1, is rotated relative to the sections 4 and 6 by means of sliding on the spherical surface abutting end portions of the sections around the center of rotation located on the longitudinal axis of the shield. In this case, depending on the magnitude and direction of deviation of the body of the shield will change and the angle of rotation at the connection node of the sections of formwork, by changing the distance between the sections on different sides (decreasing on the inner side of the turn and increases the site of connection of a flexible cable, zapakowanego in roller blocks. The presence of trapezoidal wedges 14, installed via elastic elements 16, allows you to deform the sections of the casing in the radial direction within the elastic deformation, which eliminates the possibility of jamming of the sections of the casing at curved sections of the track when the deviation section of casing in a stage setting and hardening of concrete.

This design allows the device to provide the same intimate contact between abutting sections of the formwork due to the presence of General cable, passing through all the sections of the casing, which increases the operational reliability of the tunneling machine and the quality of the lining of underground structures.

Tunnel shield, comprising a housing forming a section of the casing connected to the housing of the shield, transition sections of the casing and the supporting section, the end surfaces of which are spherical, with the possibility of rotation of these sections on the surface of a sphere with the axis of rotation on the longitudinal axis of the shield, the node connecting the sections of the casing in the form of a flexible cable, zapakowanego in roller blocks and secured with the possibility to adjust its tension, characterized in that the roller units mounted on the DNAs is bsim zapasovany flexible cable, each transition section and the supporting section is made integral in the radial direction of the segments, between which there is trapezoidal wedges, Rethimno attached via elastic elements on the inner surface of each section.

 

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EFFECT: improved efficiency of operation owing to prevention of formation of air locks in concrete line and accumulation of mix at bottom of vessel.

2 dwg

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