Drilling anchoring pre-supporting system based on shield operation and construction method

A pre-support and anchoring technology, which is applied in earth-moving drilling, installation of bolts, mining equipment, etc., can solve the problems of affecting the quality of anchoring, low drilling efficiency, and scrapping of anchoring holes, so as to increase the stability of anchoring and improve drilling. Efficiency and the effect of improving anchorage quality
CN113738418APending Publication Date: 2021-12-03GUIZHOU SINODRILLS EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUIZHOU SINODRILLS EQUIP
Publication Date
2021-12-03

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Abstract

The invention discloses a drilling anchoring pre-supporting system based on shield operation and a construction method, and aims to provide the drilling anchoring pre-supporting system and the construction method based on the drilling anchoring pre-supporting system. The system comprises an MF quick-change drill rod, a drill shank and an anchor rod; the anchor rod (1) is composed of a drill bit (1-1) connected with an anchoring pipe, a pipe shoe (1-6) connected with the anchoring pipe through a pipe opening lock catch connector and a PVC pipe (1-7) connected with the pipe shoe; and the pipe opening lock catch connector is composed of a lock catch female connector (1-4) connected with the anchoring pipe and a lock catch male connector (1-5) connected with the MF quick-change drill rod (4), and a spiral through groove (1-4-1) of the lock catch female connector (1-4) is matched with a spiral cam groove (1-5-1) of the lock catch male connector (1-5). According to the system, the cutting boundary (7) of the tunnel face (6) is determined firstly, the system is obliquely chiseled into the rock mass (5), the MF quick-change drill rod (4) is withdrawn from the PVC pipe (1-7), and the tunnel face (6) is cut after grouting solidification.
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Description

technical field

[0001] The invention relates to a tunnel drilling and anchoring pre-support system and a construction method, in particular to a drilling and anchoring pre-support system based on shield tunneling operations, and a construction method based on the drilling and anchoring pre-support system. Background technique

[0002] As we all know, the support of underground engineering can be divided into pre-support and post-support according to the construction time of support structure. The support that reinforces the rock strata of the cave body before excavation of the tunnel is called pre-support, and the support that reinforces the rock strata of the cave body after excavation of the tunnel is called post-support. The working face that is constantly advancing during the excavation of the tunnel is called the face of the tunnel.

[0003] In order to strengthen the rock formation in the unexcavated area in front of the tunnel face, prevent deformation and collapse o...

Claims

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