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Tunnel shields ![]()
Tunnel shield «Kristall» with rotor actuator is designed for mechanized construction of tunnels with monolithic compressed interior finish of 1700 mm in diameter in the mixed and water-saturated soils of 1-1 U category as per SNP Sh-P-77 with hydrostatic pressure up to 0,25 MPa and hydraulic transportation of the worked out soil.
Tunnel shield «Topaz» with rotor actuator is designed for mechanized construction of tunnels with monolithic compressed interior finish of 3,36 m in diameter in the mixed and water-saturated soils with pressure up to 0,25 MPa and in rocks with strength up to 80 MPa having boulders up to 450 mm.
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| Name of parameters | Shield "Kristall" | Shield "Topaz" | | Outer diameter of shield, mm | 2040 | 4020 | | Number of jacks: | | | | shield jacks | 8 | | | control jacks | 6 | | | jacks for drawing up the forms | 6 | | | Pressure in the hydraulic system, MPa | 32 | 32 | | Actuator: | | | | type | rotor | rotor | | torque, KNm | 240 | 1400 | | rotational speed, rpm | 1,5 | 1,82 | | Technical speed of tunnel construction, m/hr | 0,5 | 0,5 | | Nominal voltage of power supply, V | 380 | 380 | | Frequency of power supply, Hz | 50 | 50 | | Total installed capacity (without pumps of water supply and exhaustion), KW | 70 | - | | Capacity of devices for soil extraction from the stope, m3/hr | - | 100 | | Min. radius of tunnel curvature, m | - | 100 |
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