Prefabricated type tunnel foot-lock anchors rod and steel frame connecting member

Abstract

The invention discloses are prefabricated type tunnel foot-lock anchor rods and a steel frame connecting member and belongs to the technical filed of tunnel engineering. The steel frame connecting member are composed of the foot-lock anchor rods, a support steel frame, positioning annular pieces, a left bolt sleeve, a right bolt sleeve and a bolt buckle. In the preparation stage, firstly, the ends (on the side where the ends are connected with the steel frame) of the foot-lock anchor rods are subjected to thread machining pretreatment; and secondly, according to the designed positions and construction angles of the foot-lock anchor rods, the positioning annular pieces are welded to the corresponding positions of the support steel frame. In the construction stage, the foot-lock anchor rods are subjected to precise positioning construction through the front and rear positioning annular pieces of the support steel frame; and then the foot-lock anchor rods on the two sides of the support steel frame are connected to be a whole in an anchoring mode through the prefabricated left bolt sleeve, the right bolt sleeve and a bolt fastener. By adopting the structure, the foot-lock anchor rods can be constructed precisely and stably connected with the support steel frame, the overall stability of a tunnel primary supporting structure is improved, and the difficult problem of tunnel engineering construction is effectively solved.

Description

Technical field [0001] The invention relates to a steel frame connection component, in particular to a prefabricated tunnel lock foot anchor rod and a steel frame connection component, and belongs to the technical field of tunnel engineering. Background technique [0002] In recent years, with the vigorous development of railway construction, tunnel engineering projects have become more common, and the engineering geological conditions involved have become increasingly complex. When constructing the main tunnel, auxiliary tunnel or auxiliary cavern in the area with poor surrounding rock, it is usually necessary to add lock-foot anchor rods in the area of ​​the side wall during the initial support process to enhance the overall stability of the initial support structure and prevent arching Feet shrink and arch out. However, when the main tunnel, auxiliary tunnel or auxiliary cavern is constructed in the area with poor surrounding rock. [0003] However, in the current construction...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the engineering problem of poor connection between the current tunnel support steel frame and the lock-foot bolt, and propose a set of prefabricated tunnel lock-foot bolt and steel frame connection components: and realize the standardization and factory production of the connection components

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