Guiding and rectifying device for sandy cobble stratum pipe shed construction

Abstract

The invention relates to a guiding and rectifying device for sandy cobble stratum pipe shed construction. The guiding and rectifying device comprises a circular ring and a fixed unit, wherein the circular ring is arranged in a pipe shed steel pipe, the axis of the circular ring is parallel to that of the pipe shed steel pipe, a guiding hole for a drill pipe to penetrate through is formed in the circular ring, and the drilling of the drill pipe is guided and rectified through the guiding hole; and the fixed unit is arranged on the outer side surface of the circular ring, is arranged between thecircular ring and the pipe shed steel pipe and is used for keeping the axis of the circular ring parallel to the axis of the pipe shed steel pipe. The guiding and rectifying device for the sandy cobble stratum pipe shed construction has the beneficial effects that the guiding and rectifying device is matched with sandy cobble stratum super-long pipe shed construction, and the axis position of thedrill pipe can be controlled, so that the drilling direction of a drill bit can be controlled, and the precision of the drilling direction is guaranteed in a construction process; and additionally, when the drilling direction deviates, the axis direction of the drill pipe is adjusted by adjusting the extension length of a screw rod, so that the drilling direction of the drill bit is changed, andthe deviation rectifying purpose is achieved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction protection, and more specifically relates to a construction guide and deviation correction device for pipe sheds in sand and pebble formations. Background technique [0002] Pipe shed support technology has developed rapidly in recent years, and has been gradually adopted in large quantities in the construction of subway shield tunnels to support and reinforce the ground. The pipe shed support technology has the advantages of long advance support distance and high rigidity, and can be better applied to unsteady drilling working faces and water-bearing formations. The pipe shed and the tunnel structure together form a support system, which can effectively control the deformation of the surrounding rock. [0003] Although the pipe shed support has the advantages of the above applications, it also has certain defects. For example, it is difficult to construct an ultra-long pipe shed in a...

AI Technical Summary

Problems solved by technology

[0003] Although the pipe shed support has the advantages of the above applications, it also has certain defects. For example, it is difficult to construct an ultra-long pipe shed in a sandy pebble formation, especially in a sandy pebble formation with a large particle size and high content. Construction in sand and pebble formations with the characteristics of poor self-stabilization and other characteristics often has problems such as uncontrollable drilling accuracy and large deviations, which limits the use of ultra-long pipe shed support structures in sand and pebble formations

However, the deflection correcting drill bits used in the existing pipe shed construction are not suitable for the construction of sand and pebble formations.

Images