Tunnel underground excavation pipe shed guide pipe drilling construction precision control method

Abstract

The invention discloses a tunnel underground excavation pipe shed guide pipe drilling construction precision control method. The method comprises the following steps that S1, a guide wall is installed; s2, a working platform is erected, a drilling machine is in place, and it is ensured that the axis of a drilling rod of the drilling machine is matched with the axis of an orifice pipe; s3, drilling is conducted, specifically, the height of a drilling machine platform is determined according to the adjustable range of a drilling machine and the drilling sequence, and due to the fact that the drilling sequence of the drilling machine is conducted from the high hole site to the low hole site, the position of the platform is gradually lowered from top to bottom correspondingly; s4, auxiliary positioning is conducted through a laser demarcation device, deviation adjustment is conducted in the drilling process of the pipe roof pipe, and one-time positioning adjustment is conducted on a section of pipe roof pipe to be drilled; s5, a support is adjusted, and the drilling deviation of the pipe roof pipe is adjusted by adjusting the support; and S6, a stop-grouting plug is installed. The problem can be effectively solved by adopting a method for assisting precision control through the laser demarcation device, and the overall precision when the pipe shed pipe is drilled into the guide pipe is guaranteed.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a method for controlling the construction accuracy of a guide pipe hole in a tunnel digging pipe shed. Background technique [0002] The advanced large pipe shed is an advanced supporting structure during shallow burial and underground excavation in underground structural engineering. Its essence is to pre-drill and install thick-walled steel pipes with a large moment of inertia on the buried arc of the lining arch ring of the underground tunnel or structural project to be excavated to play a temporary advanced supporting role to prevent soil collapse and The surface subsides to ensure the safe operation of the excavation and subsequent support processes. During the construction of the existing pipe shed method, the pipe shed often deviates during the drilling process, so that the drilling length of the pipe shed at one time is limited. [0003] At present, the...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for controlling the drilling accuracy of guide pipes in tunnel excavation pipe sheds. This method can fully solve the problems and difficulties in the construction accuracy control of guide pipe drillings.

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