阅读说明：本技术 一种钢管-h型钢拱架隧洞支护结构 (Steel pipe-H shaped steel bow member tunnel supporting construction ) 是由 魏军政 刘赪 李凌志 黄双林 王飞 赵秋林 池佐华 张萌 李一然 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种钢管-H型钢拱架隧洞支护结构。隧道钢拱架支护是我国隧道工程建设过程中较为常用的一种技术形式。本发明包括多个沿隧洞轴向设置的型钢拱架,型钢拱架之间通过圆弧状纵向连接钢管固定连接；型钢拱架外形为圆弧状,由多个H型钢拱架通过螺栓固定连接形成。本发明增强了型钢拱架间的整体性、稳定性,提高了整体结构的强度、刚度以及抗冲击性能；圆弧型H型钢角部部位固定焊接有圆弧形连接钢管,增大了H型钢的刚度及承载能力,使其具有更好的抗冲击能力,有效减小变形、扭曲现象,降低岩爆灾害所带来的风险。(The invention discloses a steel pipe-H-shaped steel arch tunnel supporting structure. The tunnel steel arch frame support is a commonly used technical form in the tunnel engineering construction process of China. The tunnel comprises a plurality of profile steel arches which are arranged along the axial direction of a tunnel, wherein the profile steel arches are fixedly connected through arc-shaped longitudinal connecting steel pipes; the profile steel arch is arc-shaped and is formed by fixedly connecting a plurality of H-shaped steel arches through bolts. The invention enhances the integrity and stability among the section steel arches, and improves the strength, rigidity and shock resistance of the whole structure; the arc-shaped connecting steel pipe is fixedly welded at the corner part of the arc-shaped H-shaped steel, so that the rigidity and the bearing capacity of the H-shaped steel are improved, the H-shaped steel has better impact resistance, the deformation and distortion phenomena are effectively reduced, and the risk caused by rock burst disasters is reduced.)

1. The utility model provides a steel pipe-H shaped steel bow member tunnel supporting construction which characterized in that: the tunnel structural steel arch comprises a plurality of structural steel arches (1) arranged along the axial direction of a tunnel, wherein the structural steel arches (1) are fixedly connected through longitudinal connecting steel pipes (2); the shape of the longitudinal connecting steel pipe (2) is arc-shaped;

the profile steel arch (1) is arc-shaped and is formed by fixedly connecting a plurality of H-shaped steel arches (3) through bolts; the H-shaped steel arch frame (3) comprises circular H-shaped steel (4), circular connecting steel pipes (5), U-shaped steel plates (6) and connecting side plates (7);

the U-shaped steel plates (6) are fixedly connected to two ends of the circular arc H-shaped steel (4), two opposite surfaces of each U-shaped steel plate (6) are overlapped with the inner surface of the flange of the circular arc H-shaped steel (4), the opening ends of the U-shaped steel plates (6) are fixedly connected with connecting side plates (7), and bolt connecting holes are formed in the connecting side plates (7); the arc-shaped connecting steel pipe (5) is fixedly connected with the arc-shaped H-shaped steel (4), and the outer surface of the arc-shaped connecting steel pipe (5) is tangent to the web plate and the inner surface of the flange of the arc-shaped H-shaped steel (4); and two ends of the circular arc-shaped connecting steel pipe (5) are fixedly connected with the U-shaped steel plate (6).

2. The steel pipe-H-shaped steel arch tunnel supporting structure of claim 1, wherein: the profile steel arch (1) is fixedly connected with the longitudinal connecting steel pipe (2) in a welding mode.

3. The steel pipe-H-shaped steel arch tunnel supporting structure of claim 2, wherein: the U-shaped steel plate (6) is fixedly connected with the arc-shaped H-shaped steel (4) and the connecting side plate (7) in a welding mode.

Technical Field

The invention belongs to the technical field of high-buried-depth tunnels and underground engineering, and particularly relates to a steel pipe-H-shaped steel arch tunnel supporting structure.

Background

The tunnel steel arch support is a technical form commonly used in the tunnel engineering construction process of China, and the top and the periphery of a tunnel need to be supported in order to better fix the tunnel, particularly surrounding rocks with poor geology, in the construction process. The steel arch has better bearing capacity, can play a better supporting role in the construction process, and is a main supporting main body of tunnel engineering. Along with more and more tunnel projects for deeply burying large and long tunnels in China, the problem of faced rockburst disasters is more and more prominent, the frequent rockburst disasters threaten the personal safety of constructors and the safety of construction machinery and equipment, the supporting cost is increased, the construction progress is influenced, and large-scale block-shaped and plate-shaped spalling, ejection and flying-out can be realized when the rockburst grade is higher. In severe cases, rocks with the weight of the top ton are bounced off the arch to cause scale collapse induced by rock burst, rock burst has no obvious sign before the rock burst occurs, the rock burst occurs with abruptness, uncertainty and randomness, the problem is generally relieved by reducing the distance between the steel arches, but the problem is not effectively controlled due to the defects of the rigidity and the shock resistance of the steel arches.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides a steel pipe-H-shaped steel arch tunnel supporting structure which has better bearing capacity and impact resistance and reduces risks caused by rockburst disasters.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a steel pipe-H-shaped steel arch tunnel supporting structure comprises a plurality of shaped steel arches arranged along the axial direction of a tunnel, wherein the shaped steel arches are fixedly connected through longitudinal connecting steel pipes; the shape of the longitudinal connecting steel pipe is arc-shaped;

the profile steel arch is arc-shaped and is formed by fixedly connecting a plurality of H-shaped steel arches through bolts; the H-shaped steel arch comprises circular-arc-shaped H-shaped steel, circular-arc-shaped connecting steel pipes, U-shaped steel plates and connecting side plates;

the U-shaped steel plates are fixedly connected to two ends of the circular arc H-shaped steel, two opposite surfaces of each U-shaped steel plate are overlapped with the inner surface of the flange of the circular arc H-shaped steel, the opening ends of the U-shaped steel plates are fixedly connected with connecting side plates, and bolt connecting holes are formed in the connecting side plates; the arc-shaped connecting steel pipe is fixedly connected with the arc-shaped H-shaped steel, and the outer surface of the arc-shaped connecting steel pipe is tangent to the inner surfaces of the web plate and the flange of the arc-shaped H-shaped steel; two ends of the circular arc connecting steel pipe are fixedly connected with the U-shaped steel plate;

specifically, the profile steel arch and the longitudinal connecting steel pipe are fixedly connected in a welding mode;

specifically, the U-shaped steel plate, the arc-shaped H-shaped steel and the connecting side plate are fixedly connected in a welding mode.

The invention has the beneficial effects that:

1) the steel arches are fixedly connected through the arc-shaped longitudinal connecting steel pipes, so that each steel arch is effectively connected together, the integrity and stability of the steel arches are enhanced, and the strength, rigidity and impact resistance of the integral structure are improved;

2) the arc-shaped connecting steel pipe is fixedly welded at the corner part of the arc-shaped H-shaped steel, so that the rigidity and the bearing capacity of the H-shaped steel are improved, the H-shaped steel has better impact resistance, the phenomena of deformation and distortion are effectively reduced, and the risk caused by rock burst disasters is reduced;

drawings

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

FIG. 2 is a schematic structural diagram of a steel arch;

FIG. 3 is a schematic view of the connection of H-shaped steel arch centering;

FIG. 4 is a schematic view of the connection between the circular-arc H-shaped steel and the circular-arc connecting steel pipe;

in the figure, 1-section steel arch, 2-longitudinal connecting steel pipes, 3-H-section steel arch, 4-arc H-section steel, 5-arc connecting steel pipes, 6-U-shaped steel plates and 7-connecting side plates.

Detailed Description

The present invention will be described in detail with reference to specific embodiments.

As shown in fig. 1, the overall structure of the invention is schematically illustrated, the invention comprises a plurality of profile steel arches 1 arranged along the axial direction of a tunnel, and the profile steel arches 1 are fixedly connected with each other through longitudinal connecting steel pipes 2; the shape of the longitudinal connecting steel pipe 2 is arc-shaped; the profile steel arch 1 is fixedly connected with the longitudinal connecting steel pipe 2 in a welding mode; the steel arches 1 are effectively connected, the integrity and the stability of the steel arches are enhanced, and the strength, the rigidity and the shock resistance of the integral structure are improved;

as shown in the structural schematic diagram of the steel arch 1 in fig. 2, the steel arch 1 is arc-shaped and is formed by fixedly connecting 3H-shaped steel arches 3 through bolts; the H-shaped steel arch 3 comprises circular H-shaped steel 4, circular connecting steel pipes 5, U-shaped steel plates 6 and connecting side plates 7;

as shown in fig. 3, a schematic connection diagram of an H-shaped steel arch and a schematic connection diagram of an arc-shaped H-shaped steel and an arc-shaped connecting steel pipe in fig. 4, the U-shaped steel plates 6 are fixedly connected to two ends of the arc-shaped H-shaped steel 4 in a welding manner, and two opposite surfaces of the U-shaped steel plates 6 are overlapped with the inner surface of the flange of the arc-shaped H-shaped steel 4; the open end of the U-shaped steel plate 6 is fixedly connected with a connecting side plate 7 in a welding mode; the connecting side plate 7 is provided with a bolt connecting hole; the H-shaped steel arch frames 3 are connected with each other through bolt connecting holes on the connecting side plates 7 by using bolts;

the arc-shaped connecting steel pipe 5 is fixedly connected with the arc-shaped H-shaped steel 4 in a welding mode, and the outer surface of the arc-shaped connecting steel pipe 5 is tangent to the web plate and the inner surface of the flange of the arc-shaped H-shaped steel 4; two ends of the circular arc connecting steel pipe 5 are fixedly connected with the U-shaped steel plate 6 in a welding mode; the arc-shaped connecting steel pipe is fixedly welded at the corner part of the arc-shaped H-shaped steel, so that the rigidity and the bearing capacity of the H-shaped steel are increased, the H-shaped steel has better impact resistance, and the deformation and distortion phenomena are effectively reduced; the U-shaped steel plates 6 are arranged at two ends of the circular arc H-shaped steel 4, so that the structural strength of the two ends of the circular arc H-shaped steel 4 can be enhanced, meanwhile, the space required by construction of the arch frame butt joint bolt is reserved, and end support is provided for the circular arc connecting steel pipe 5.

The construction method comprises the following steps: fixedly connecting a plurality of H-shaped steel arches 3 through bolts to form an arc-shaped steel arch 1, and after the sizes of all parts reach the design standard, re-fastening all the bolts once to ensure reliable connection; after one steel arch truss is constructed, prefabricated circular arc-shaped longitudinal connecting steel pipes 2 are manufactured, one ends of the longitudinal connecting steel pipes 2 are welded on the manufactured steel arch truss to enable the middle points of the longitudinal connecting steel pipes to be tightly attached to surrounding rocks, then the next steel arch truss is manufactured, the other ends of the longitudinal connecting steel pipes 2 are welded on the steel arch truss, and the steps are sequentially repeated to finish the integral supporting.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "secured" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.