Butt joint device for achieving staggered layer folding of adjacent arch frames and arch frame splicing method

Abstract

The invention discloses a butt joint device for achieving staggered layer folding of adjacent arch frames and an arch frame splicing method. The butt joint device comprises a first connecting base and a second connecting base; the first connecting base and the second connecting base are connected with the two adjacent arch frames correspondingly; the mutual rotation connecting relation capable of enabling the two adjacent arch frames to be in a folded state or a butt joint state is formed between the first connecting base and the second connecting base; during folding rotation, a gap capable of enabling the first connecting base and the second connecting base to deviate from the rotation face and used for driving the adjacent arch frames to be folded in a staggered layer manner exists between the first connecting base and the second connecting base; and during butt joint rotation, the first connecting base and the second connecting base are driven to eliminate deflection through mutual rotation cooperation so as to drive the adjacent arch frames to be aligned. The two adjacent arch frames can rotate around a rotation shaft while rotating, the folding size of the adjacent arch frames is minimum, and transportation is convenient. The butt joint device is provided with a guiding correcting device, guiding correcting is facilitated when the adjacent arch frames are unfolded, and bolt fast penetrating and installing are convenient.

Description

technical field [0001] The invention relates to the field of underground engineering, in particular to a butt joint device and an arch splicing method for realizing staggered folding of adjacent arches. Background technique [0002] During the construction of the tunnel, it is necessary to erect a steel arch frame in the excavated rock. The existing construction method is to transport multiple sections of arch steel into the tunnel, and manually install and splice each section to form a whole steel arch frame. The splicing requires connecting flanges Several bolts at the plate, and the entire splicing process is completed in the tunnel. The existing arches are heavy, and the installation of the steel arches mainly depends on manpower, which is time-consuming and labor-intensive, and the light in the tunnel is weak. The bolts connecting the flange plates of the two arches are the most difficult and least efficient in the erection link. Time-consuming process. [0003] At pr...

AI Technical Summary

Problems solved by technology

When the folding arch is in a folded state, it is convenient for transportation.” The left arch section and the right arch section in the comparison document are respectively hinged with the top arch section by hinge hinges. The tail end of the arch section is folded to the left and right sides of the top arch section, but this plan is more idealized. In actual production, it is not possible to produce such a large gap at the tail ends of the left and right arch sections only through a slight vibration on the hinge shaft. misalignment in the vertical plane

The hinges in the comparison document are fixedly connected to the left arch section, right arch section and top arch section. The hinges cannot be disassembled. After the steel arch is installed, the hinges will no longer play any role, and a tunnel usually needs to be erected thousands of Tens of thousands of steel arches, and each steel arch contains multiple hinges, so the erection cost is greatly increased, resulting in huge waste

When the left arch section, the right arch section and the top arch section in the comparison file are docked, there is a certain gap due to the hinge joint method, which makes the centerline of the bolt hole at the joint of the left arch section, the right arch section and the top arch section misaligned. Bolts are difficult to wear once, which greatly increases the labor intensity of workers

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