Thrust hydraulic cylinder adjusting method capable of realizing unbalance loading resistance of rectangular shield
An adjustment method and technology of rectangular shield, which are applied in earth-moving drilling, mining equipment, tunnels, etc., can solve the problems of affecting the construction quality of tunnels, increasing the difficulty of adjustment, and crushing segments, so as to increase the scope of applicable strata, Reduced propulsion system deformation, protection from damage
Active Publication Date: 2019-09-24
HUNAN UNIV OF SCI & TECH
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Problems solved by technology
However, none of the existing propulsion systems can solve the eccentric load phenomenon caused by the special geological conditions or self-weight of the shield, and the external direction-changing load. Excessive eccentric loads will cause the segments to be crushed, resulting in water leakage from the segments, and eventually Affects the construction quality of the tunnel; the existing method of adjusting the external eccentric load requires adjusting all hydraulic cylinders, and adjusting the positions of all hydraulic cylinders at one time is not only difficult to adjust, but also low in efficiency
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[0046] Such as figure 2 shown and Figure 6 As shown, the rectangular shield machine mainly includes a shield head 1, a hydraulic cylinder 2, a shield shell 3, a support shoe 5, and a screw conveyor 6; the cutter head on the shield head 1 cuts rocks and soil through the screw conveyor 6, The left end of the hydraulic cylinder 2 is connected to the shield head 1, the right end is hinged to the support shoe 5, and finally pushes against the segment 4, and the reaction force of the segment 4 is used to drive the shield forward; the oil inlet of each hydraulic cylinder 2 is connected to There is a pressure sensor, and the pressure sensor is connected with a central controller, a data acquisition and processing module is arranged in the central controller, and the central controller is connected with a display module.
[0047] Such as Figure 4 As shown, when combined external resistance torque M 合 Intersects the side parallel to the y-axis of the rectangle in the direction F...
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The invention discloses a thrust hydraulic cylinder adjusting method capable of realizing unbalance loading resistance of a rectangular shield. Based on a stress model of the rectangular shield in the tunneling process, according to the measured magnitude of thrust of each thrust hydraulic cylinder, resultant external resistance torque of external loads acted on the shield is reversely derived; a line in a direction perpendicular to the resultant external resistance torque is defined as a layout position line; the positions of the hydraulic cylinders on two edges of the diagonal point with the shortest travel from the layout position line in the rectangular shield are adjusted, that is, the hydraulic cylinders on the adjacent long and short edges of the rectangular diagonal point are adjusted, and the positions of the two hydraulic cylinders are nearest the diagonal point, so that the optimal layout of the hydraulic cylinders of a shield propelling system is realized; and finally, the thrust value of each hydraulic cylinder is the same, so that the force of the hydraulic cylinders acted on pipe pieces is uniform, the destruction of the pipe pieces is prevented, and the unbalance loading phenomenon of the shield caused by the geological condition difference or self weight and turning loads is solved.
Description
technical field [0001] The invention belongs to the technical field of shield tunneling, and in particular relates to a method for adjusting a propulsion hydraulic cylinder for realizing anti-eccentric load of a rectangular shield. Background technique [0002] The rectangular shield propulsion system is a key component of the rectangular shield, which mainly undertakes the excavation task of the entire shield. However, none of the existing propulsion systems can solve the eccentric load phenomenon caused by the special geological conditions or self-weight of the shield, and the external direction-changing load. Excessive eccentric loads will cause the segment to be crushed, resulting in water leakage from the segment, and eventually It affects the construction quality of the tunnel; in the prior art, the adjustment method for the external eccentric load needs to adjust all the hydraulic cylinders, and adjusting the positions of all the hydraulic cylinders at one time is not...
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IPC IPC(8): E21D9/06
CPCE21D9/0621
Inventor 邓孔书尹祝融曾露丁一成徐尤南周建军冯平法孙振川李凤远张兵李宏波
Owner HUNAN UNIV OF SCI & TECH