CN111425227A - Bolt buckle type connecting device suitable for steel arch frame segment of tunnel and mounting method thereof - Google Patents

Abstract

A bolt buckle type connecting device for steel arch frame sections of a tunnel is characterized in that an arch frame can be divided into n sections of steel arches, wherein n is a positive integer not less than 2, and two adjacent sections of the n sections of steel arches are connected through a hinge type chain. And to provide a method of installing a bolt-and-snap connection for a steel arch segment of a tunnel. The invention provides a bolt buckle type connecting device for a steel arch frame segment of a tunnel and an installation method thereof, which are easy to disassemble and detect, high in working efficiency and good in safety.

Description

Bolt buckle type connecting device suitable for steel arch frame segment of tunnel and mounting method thereof

Technical Field

The invention relates to the field of underground engineering construction, in particular to a bolt buckle type connecting device suitable for a steel arch frame segment of a tunnel and an installation method thereof,

background

When a tunnel is tunneled in poor surrounding rocks, a steel arch is one of necessary supporting members, particularly, if a section steel frame is reasonably and timely installed, the supporting effect can be immediately exerted, which is very important for guaranteeing construction safety and controlling formation deformation, and is incomparable with other supporting members. Under the existing conventional method, after each round of tunnel excavation is finished, workers are generally required to complete the positioning of a steel arch under the condition of being close to an excavation surface, and then an arch bridge is installed and arch feet are fixed. The erection method divides the steel arch frame into a plurality of sections, manually erects and installs the sections by sections, and then connects the sections by bolts, so that the construction safety is poor, the speed is low, the occupied operation cycle time is long, and the erection quality is also problematic. The current situation is improved to a certain extent, but the bolt screwing efficiency is not too high, the method has certain danger, and the method is not easy to disassemble and detect.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the bolt buckle type connecting device for the steel arch frame segment of the tunnel and the installation method thereof, which are easy to disassemble and detect, higher in working efficiency and better in safety.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a bolt buckle type connecting device for steel arch frame sections of a tunnel is characterized in that an arch frame can be divided into n sections of steel arches, wherein n is a positive integer not less than 2, and two adjacent sections of the n sections of steel arches are connected through a hinge type chain.

Furthermore, the end part of the hinge type hinge is provided with a hinge shaft and two connecting steel plates which are connected with the hinge shaft and can rotate around the hinge shaft respectively, and the two connecting steel plates are also fixed on the end surfaces of two adjacent steel arches respectively.

Furthermore, corresponding bolt buckle structures are respectively arranged at corresponding positions on the two connecting steel plates; when the steel arch centering is unfolded in place, the adjacent two sections of steel arches are fixed through the bolt buckle structures on the two connecting steel plates, and the fixed support of the steel arch centering is realized.

Furthermore, the hinge shaft of the hinge type hinge is positioned on the inner side of the steel arch frame and is perpendicular to the tunnel excavation surface. Therefore, when the steel arch frame is transversely unfolded on an excavation surface, the core soil can obstruct the unfolding of the steel arch frame when the excavation method of reserving the core soil is adopted, and therefore the steel arch frame is particularly suitable for common tunnels.

A method of installing a bolt-on connection suitable for a steel arch segment of a tunnel, comprising the steps of:

(1) taking a plurality of sections of steel arches, sequentially connecting the steel arches by hinge type hinge to form a whole, and then completely folding and conveying the steel arches to the bottom of the arch;

(2) lifting the top of the steel arch by using a telescopic arm operation vehicle, erecting the folded steel arch at a designed position, and then automatically unfolding;

(3) after the steel arch frame is erected and positioned, welding and fixing the arch springing of the newly erected steel arch frame and the arch springing of the steel arch frame which is fixedly installed in the prior art by adopting steel bars;

(4) closing the hinge type hinge between two adjacent sections of steel arches, and completely closing the upper steel plate and the lower steel plate;

(5) and inserting the two bolts into the bolt holes on the two sides of the steel plate respectively.

The invention has the following beneficial effects: 1) the steel arch frame can be integrally folded after being processed, and transportation is convenient. 2) The installation is mainly mechanical installation and is manually assisted in positioning and connection. 3) One steel arch can be installed at one time, and the construction efficiency is high, the speed is high and the cost is low.

Drawings

FIG. 1 is a schematic view of the finishing structure of the present invention;

FIG. 2 is a schematic view of a hinge and a bolt hole at the junction of adjacent steel arches of the present invention;

FIG. 3 is a schematic view of the latch of the present invention

FIG. 4 is a schematic view of the rear side of the steel arch after the installation of the joint

FIG. 5 is a schematic view of the inner side of the steel arch after the steel arch joint is installed

In the figure, 1-steel arch, 2-hinge, 3-hinge shaft, 4-connecting steel plate, 5-bolt hole, 6-bolt head, 7-bolt and 8-bolt tail.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 1 to 5, the snap-in type connecting device for the steel arch frame segments of the tunnel comprises five steel arches 1, wherein two adjacent steel arches 1 in the five steel arches 1 are connected through a hinge type hinge 2. The hinge type hinge 2 comprises a hinge shaft 3 and two connecting steel plates 4 which are connected with the hinge shaft 3 and can respectively rotate around the hinge shaft, and the two connecting steel plates 4 are respectively and fixedly connected with the end surfaces of two adjacent steel arches 1. Bolt holes 5 are formed in the two connecting steel plates 4; when the steel arch 1 is unfolded in place, the adjacent two sections of steel arches 1 are structurally fixed with the bolt holes 5 and the bolts 7, so that the fixed support of the steel arch 1 is realized. And a hinge shaft 3 of the hinge type hinge 2 is positioned on the inner side of the steel arch 1 and meets the condition that the hinge shaft 3 is vertical to the tunnel excavation surface.

A method of installing a bolt-on connection suitable for a steel arch segment of a tunnel, comprising the steps of:

(1) taking five sections of steel arches 1, sequentially connecting the five sections of steel arches by hinge type hinge joints 2 to form a whole, and then completely folding and conveying the steel arches to the bottom of the arch;

(2) lifting the top of the steel arch 1 frame by using a telescopic arm operation vehicle, erecting the folded steel arch 1 frame at a designed position, and then automatically unfolding;

(3) after the steel arch 1 frame is erected and positioned, welding and fixing the arch springing of the newly erected steel arch 1 frame and the arch springing of the steel arch 1 frame which is fixedly installed in the past by adopting steel bars;

(4) closing and fixing a hinge type hinge 2 between two adjacent sections of steel arches 1, and completely closing an upper steel plate and a lower steel plate;

(5) two bolts 7 are respectively inserted into the bolt holes 5 at two sides of the steel plate.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (5)

1. The bolt-buckle type connecting device for the steel arch frame sections of the tunnel is characterized in that an arch frame is divided into n sections of steel arches, wherein n is a positive integer not less than 2, and two adjacent sections of the n sections of steel arches are connected through a hinge type chain hinge.

2. A bolt-buckle type connecting device for steel arch sections of tunnels as claimed in claim 1, wherein the hinge-type hinge has a hinge shaft at its end, and two connecting steel plates connecting the hinge shaft and respectively rotating around it, and the two connecting steel plates are fixed to the end faces of two adjacent steel arches respectively.

3. The bolt-buckle type connecting device for the steel arch section of the tunnel as claimed in claim 2, wherein the two connecting steel plates are welded with corresponding bolt-buckle structures at corresponding positions respectively; when the steel arch frame is unfolded in place, the adjacent two sections of steel arches are fixed by the bolt buckle structure, so that the fixed support of the steel arch frame is realized.

4. A bolt-on type connecting device for steel arch sections of tunnels as claimed in claim 2, wherein the hinge axis of the hinge is located at the inner side of the steel arch and is perpendicular to the tunnel excavation face.

5. A method of installing a bolt-and-snap connection device for a steel arch segment of a tunnel according to claim 1, characterized in that it comprises the following steps:

(1) taking a plurality of sections of steel arches, sequentially connecting the steel arches by hinge type hinge to form a whole, and then completely folding and conveying the steel arches to the bottom of the arch;

(2) lifting the top of the steel arch by using a telescopic arm operation vehicle, erecting the folded steel arch at a designed position, and then automatically unfolding;

(3) after the steel arch frame is erected and positioned, welding and fixing the arch springing of the newly erected steel arch frame and the arch springing of the steel arch frame which is fixedly installed in the prior art by adopting steel bars;

(4) closing the hinge type hinge between two adjacent sections of steel arches, and completely closing the upper steel plate and the lower steel plate;

(5) and inserting the two bolts into the bolt holes on the two sides of the steel plate respectively.

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