Device and method for dynamically adjusting angle of feet-lock anchor pipe in tunnel

Abstract

The invention relates to the technical field of tunnel feet-lock anchor pipe installation, in particular to a dynamic adjusting device and method for the angle of a feet-lock anchor pipe in a tunnel, and the dynamic adjusting device comprises two guide pipes which are used for guiding a drill bit; the two ends of the pushing piece are correspondingly connected to the two guide pipes respectively; the two fixing plate sets are arranged between the two guide pipes; the shaft pin is detachably connected to the fixing plate and correspondingly extends into the abdominal cavity of the arch foot I-shaped steel; and the fixing bolts are arranged at the ends, extending into the abdominal cavity of the arch foot I-shaped steel, of the shaft pins and abut against the inner side of the flange of the arch foot I-shaped steel so as to fix the guide pipes. The adjusting device is simple in structure, all materials are common materials in building construction, it can be guaranteed that the angle error of the tunnel feet-lock anchor pipe is within 5 degrees through the adjusting device, the qualification rate of weld joints of feet-lock connecting ribs is greatly increased, and the production efficiency is improved. And meanwhile, the problems that the angle error is large and the lock foot connecting rib is difficult to weld due to original manual drilling are solved.

Description

technical field [0001] The invention belongs to the technical field of tunnel foot-locking anchor pipe installation, and in particular relates to a device and method for dynamically adjusting the angle of a foot-locking anchor pipe in a tunnel. Background technique [0002] In the field of tunnel construction, the locking foot anchor pipe is an important part of the initial support. When the arch foot is exposed in the construction of the step method or the guide pit method, the locking foot anchor pipe plays a very strong role in limiting settlement and convergence. The foot-locking anchor pipe is generally installed on both sides of the profiled steel arch, close to the flange plate of the steel frame, and is installed and grouted by a hand-held rock drill or bolt machine. The monitoring and measurement data can have various parameters, but generally the downward depression angle is mainly used to resist the vertical and horizontal in-situ stress of the surrounding rock it...

AI Technical Summary

Problems solved by technology

At present, the lock foot anchor pipe is mainly drilled by hand-held rock drills, and the angle is generally 30~50°, which is usually manually drilled. Because the position of each drilling hole is different, the angle error of the worker's drilling angle is large, and the monitoring and measurement results cannot be used. Dynamic adjustment cannot meet the advanced concept of tunnel dynamic management

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