A method of splitting and breaking large-sized pebble boulders with a shield heavy-duty tearing knife

Abstract

The invention discloses a method for splitting and crushing large-diameter pebble boulders with a shield heavy-duty tearing knife. The method for splitting and crushing large-size pebble boulders with a shield heavy-duty tearing knife includes the following steps: 1: Set a heavy-duty tearing knife on the panel and spokes of the shield cutter head; Step 2: The heavy-duty tearing knife rotates and chisels into large-sized pebble boulders, so that the large-size pebble boulders are chiseled into deformation; step 3: The heavy-duty tearing knife chiseled into the large-sized pebble boulder forms a compacted nucleus in the inner region of the large-sized pebble boulder; Step 4: The heavy-duty tearing knife squeezes the large-sized boulder Pebble boulders, expanding the cracks of the large-size pebble boulders; step 5: the large-size pebble boulders are broken under the action of the cracks and the chiseling of the heavy-duty tearing knife. The hammer splitting effect of the heavy-duty tearing knife is used to excavate the strata rich in super-large-sized pebble boulders and their composite strata, which solves the problem of low efficiency of shield tunneling in strata rich in super-large-size pebble boulders.

Description

technical field [0001] The invention relates to the technical field of splitting and crushing pebble boulders with large particle diameters, in particular to a method for splitting and crushing pebble boulders with large particle diameters by a shield heavy-duty tearing knife. Background technique [0002] The formation rich in ultra-large-sized boulders is looser than the hard-rock formation, and it is difficult for the formation to provide support to keep large-sized pebbles and boulders in a stable state. [0003] Using a shield cutter head equipped with a single disc hob for rock breaking will make it difficult for a shield cutter head equipped with a single disc hob to achieve rolling rock breaking, and the hob ring rotates in pebble and boulder formations It is difficult to start, and it is easy to cause the partial wear of the hob to fail. [0004] It is difficult for the cutter to break the pebbles and boulders due to the high strength of ordinary soft soil cutters,...

AI Technical Summary

Problems solved by technology

[0003] Using a shield cutter head equipped with a single disc hob for rock breaking will make it difficult for a shield cutter head equipped with a single disc hob to achieve rolling rock breaking, and the hob ring rotates in pebble and boulder formations It is difficult to start, and it is easy to cause the partial wear of the hob to fail

[0004] Common soft soil cutters are used to cut and break rocks. Due to the high strength of pebbles and boulders, it is difficult for the cutter to break them, and it is easy to cause the cutter to break and fail.

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