CN217976237U - Tunnel steel pipe type arch frame high-strength quick connecting device and tunnel supporting system - Google Patents
Tunnel steel pipe type arch frame high-strength quick connecting device and tunnel supporting system Download PDFInfo
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- CN217976237U CN217976237U CN202222314476.5U CN202222314476U CN217976237U CN 217976237 U CN217976237 U CN 217976237U CN 202222314476 U CN202222314476 U CN 202222314476U CN 217976237 U CN217976237 U CN 217976237U
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Abstract
The utility model relates to the technical field of tunnel engineering construction support, in particular to a high-strength quick connecting device of a tunnel steel pipe type arch frame and a tunnel support system, which comprises an inner connecting piece, an outer connecting piece and a high-strength connecting bolt; interior connecting piece is used for installing in contact tunnel headroom one side, outer connecting piece is used for installing in contact country rock one side, interior connecting piece with the relative lock of outer connecting piece to form cross hollow structure through the high-strength connecting bolt connection, cross hollow structure has preceding opening and the back opening that is used for the hoop to connect the steel pipe bow member festival section with the under shed and is used for longitudinal connection longitudinal tie spare. The utility model provides a connecting device can realize assembling fast of steel pipe bow member festival section and longitudinal tie spare, and has avoided establishing processes such as preformed hole or welding on the bow member, and the installation is simple and easy, and construction speed is fast, and connecting device has increased the thickness of bow member node simultaneously, has improved the intensity of node to a certain extent.
Description
Technical Field
The utility model relates to a technical field is strutted in tunnel engineering construction, concretely relates to tunnel steel pipe type arch frame high-strength quick connecting device and tunnel support system.
Background
With the continuous high-quality development of economy in China, railways and highways in China are constructed as in the daytime, but the breadth of China is vast, unstable surrounding rocks with high ground stress and low compressive strength are often encountered in the tunnel excavation process, and the situations of large deformation, instability and the like are easy to occur. The commonly used steel arch or grid arch is large in consumption, difficult to weld and mount, high in manufacturing cost and slow in construction progress, and the corresponding steel pipe concrete arch is large in support rigidity and small in deformation amount, so that the method is a good method for solving the problem of difficult support in a weak surrounding rock stratum.
The steel pipe concrete arch center is formed by installing a plurality of sections of steel pipe concrete in sections, joint sleeves or flange plates are generally used for splicing steel pipes in engineering, so that the steel pipes are arranged along the circumferential direction of the inner wall of a tunnel to form an arch attached to the inner wall of the tunnel, and the supporting effect on the tunnel is exerted. In a large deformation tunnel, as surrounding rock deformation is large, a concrete filled steel tube arch is extruded, and stress concentration can be generated when the arch deforms at a joint, so that the joint is often a weak part of the arch and can even break, and the integral collapse of the arch is caused. The existing steel pipe concrete arch center connection mode is characterized in that longitudinal connection and circumferential connection are independent, construction procedures are complicated, time and labor are consumed, welding is mainly used on site, integrity is poor, a preformed hole needs to be formed in the arch center in the longitudinal connection, and the integral structure of the arch center can be affected.
Disclosure of Invention
An object of the utility model is to provide a tunnel steel pipe type hunch frame high-speed joint device and tunnel support system, the installation of not only on-the-spot being convenient for effectively realizes steel pipe supporting construction's quick vertical and horizontal connection, promotes the wholeness ability, possesses the ability of back slip casting simultaneously, improves bearing capacity.
In order to achieve the purpose, the technical scheme of the utility model is a high-strength quick connecting device for a tunnel steel pipe type arch, which comprises an inner connecting piece, an outer connecting piece and a high-strength connecting bolt; interior connecting piece is used for installing in contact tunnel headroom one side, outer connecting piece is used for installing in contact country rock one side, interior connecting piece with the relative lock of outer connecting piece to form cross hollow structure through the high strong connecting bolt connection, cross hollow structure has the fore-shed and the back opening that are used for hoop connection steel pipe bow member section and are used for longitudinal tie connecting piece.
Furthermore, the inner connecting piece is provided with a grouting hole.
Furthermore, the inner connecting piece and the outer connecting piece both comprise a longitudinal semicircular pipe and an annular semicircular pipe which are arranged in a cross manner, and the buckling surface of the longitudinal semicircular pipe and the buckling surface of the annular semicircular pipe are on the same plane; and the longitudinal semicircular pipe is provided with a semicircular hole for the circumferential semicircular pipe to pass through, or the circumferential semicircular pipe is provided with a semicircular hole for the longitudinal semicircular pipe to pass through.
Furthermore, rib plates are arranged at four outer corner parts of the inner connecting piece and the outer connecting piece, a plurality of bolt holes are arranged on the rib plates at intervals, and the bolt holes on the inner connecting piece and the bolt holes on the outer connecting piece are in one-to-one correspondence and are respectively connected through the high-strength connecting bolts.
Furthermore, the rib plate is L-shaped, and two sides of the rib plate are respectively connected with the longitudinal semicircular pipe and the annular semicircular pipe.
Furthermore, a plurality of bolt holes are arranged on two sides of the rib plate at intervals.
Further, the diameter of the upper opening and the lower opening is slightly smaller than the diameter of the steel tube arch section.
Further, the diameter of the front opening and the rear opening is slightly smaller than the diameter of the longitudinal connector.
The utility model also provides a tunnel supporting system, which comprises a plurality of steel pipe arches arranged at intervals along the longitudinal direction, wherein the adjacent steel pipe arches are connected by a plurality of longitudinal connecting pieces, and each steel pipe arch is formed by splicing a plurality of steel pipe arch segments along the circumferential direction; the steel tube arch segment is connected with the joint of the longitudinal connecting piece by adopting the connecting device, and concrete is poured into the steel tube arch and the connecting device.
Furthermore, the longitudinal connecting piece adopts a steel pipe or a concrete-filled steel pipe short column, the steel pipe arch frame adopts a basalt composite fiber steel pipe, and the connecting device adopts a basalt composite fiber semicircular steel pipe.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) The connecting device provided by the utility model can realize the rapid assembly of the steel tube arch frame segment and the longitudinal connecting piece, and avoids the processes of arranging a preformed hole or welding on the arch frame, the installation is simple and easy, the construction speed is high, meanwhile, the connecting device increases the thickness of the node of the arch frame, and the strength of the node is improved to a certain extent;
(2) The four ends of the connecting device provided by the utility model can be connected, and the same node joint is used between the circumferential steel tube arch frame segments and between the longitudinal connecting pieces, thereby simplifying the construction process and improving the construction efficiency;
(3) The connecting device provided by the utility model is formed by connecting an inner connecting piece and an outer connecting piece which are symmetrical in structure through high-strength connecting bolts, is convenient to install, can be prefabricated in a factory, and ensures the quality of the structure;
(4) The utility model provides a last reservation of connecting device has later stage grouting hole, when the steel pipe needs the slip casting or carries out the reinforcement, the grouting hole that the accessible was reserved carries out the slip casting, realizes the interior stability of joint.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an inner connecting member and an outer connecting member provided in an embodiment of the present invention;
fig. 2 is a schematic structural view of a tunnel steel pipe type arch frame high-strength quick connecting device provided by the embodiment of the invention;
fig. 3 is a schematic structural view of a tunnel supporting system provided by an embodiment of the present invention;
in the figure: 1. a connecting device; 11. a lining connecting piece; 12. an outer connecting member; 13. a high-strength connecting bolt; 14. a longitudinal semi-circular tube; 15. a circular semicircular pipe; 16. a rib plate; 17. bolt holes; 18. a front opening; 19. a rear opening; 2. a steel tube arch segment; 3. a longitudinal connector.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The embodiment provides a high-strength quick connecting device for a tunnel steel pipe type arch frame, as shown in fig. 1-2, the connecting device 1 comprises an inner connecting piece 11, an outer connecting piece 12 and a high-strength connecting bolt 13; the inner connecting piece 11 is used for being installed on one side of a clearance of a contact tunnel, the outer connecting piece 12 is used for being installed on one side of a contact surrounding rock, the inner connecting piece 11 and the outer connecting piece 12 are buckled oppositely and connected through a high-strength connecting bolt 13 to form a cross hollow structure, and the cross hollow structure is provided with four openings, namely an upper opening and a lower opening which are used for annularly connecting the steel pipe arch section 2 and a front opening 18 and a rear opening 19 which are used for longitudinally connecting the longitudinal connecting piece 3.
Above-mentioned connecting device 1's four openings all can be connected, also can select whole openings or partial opening to connect as required, can realize assembling fast of steel pipe bow member section 2 and longitudinal connecting piece 3, and avoided establishing processes such as preformed hole or welding on the bow member, the installation is simple and easy, and construction speed is fast, and connecting device 1 has increased the thickness of bow member node simultaneously, has improved the intensity of node to a certain extent.
Furthermore, the inner connecting piece 11 is provided with a grouting hole for grouting a tunnel supporting system; after the steel tube arch and the longitudinal connecting piece 3 are connected through the connecting device 1 to form a grid structure, when the steel tube needs grouting or reinforcement, the grouting is performed into the connecting device 1 and the steel tube through the grouting holes, so that the stability in the joint device is improved, and the bearing capacity and the integrity of a tunnel supporting system are improved.
Specifically, the inner connector 11 and the outer connector 12 of the present embodiment both include longitudinal semicircular tubes 14 and circumferential semicircular tubes 15 arranged in a crisscross manner, and a fastening surface of the longitudinal semicircular tube 14 and a fastening surface of the circumferential semicircular tube 15 in the same connector are on the same plane, so as to fasten the inner connector 11 and the outer connector 12; the diameters of the longitudinal semicircular tube 14 and the circumferential semicircular tube 15 are different, so that the longitudinal semicircular tube 14 and the circumferential semicircular tube 15 can be conveniently assembled, as an implementation mode, when the diameter of the longitudinal semicircular tube 14 is larger than that of the circumferential semicircular tube 15, a semicircular hole for the circumferential semicircular tube 15 to penetrate through can be formed in the longitudinal semicircular tube 14, at the moment, the circumferential semicircular tube 15 is located on the inner side of the longitudinal semicircular tube 14, and the circumferential semicircular tube 15 and the longitudinal semicircular tube 14 are in sealing fit; as another embodiment, when the diameter of the circumferential semicircular tube 15 is larger than that of the longitudinal semicircular tube 14, a semicircular hole for the longitudinal semicircular tube 14 to pass through may be provided on the circumferential semicircular tube 15, and the longitudinal semicircular tube 14 is located inside the circumferential semicircular tube 15. Wherein, the inner connecting member 11 and the outer connecting member 12 can be prefabricated in a factory and then transported to a site for assembly.
As shown in fig. 1 and 2, rib plates 16 are arranged at four outer corners of the inner connecting member 11 and the outer connecting member 12, a plurality of bolt holes 17 are arranged on the rib plates 16 at intervals, and the bolt holes 17 on the inner connecting member 11 and the outer connecting member 12 are in one-to-one correspondence and are respectively connected through high-strength connecting bolts 13. Optimally, the rib plates 16 are L-shaped, two edges of the rib plates 16 are respectively connected with the longitudinal semicircular pipes 14 and the circumferential semicircular pipes 15, the rib plates can be connected in a welding mode, meanwhile, a plurality of bolt holes 17 are formed in the two edges of the rib plates 16 at intervals, and the high-strength connecting bolts 13 penetrate through the corresponding bolt holes 17 in the inner connecting piece 11 and the outer connecting piece 12 and are screwed up through nuts, so that the inner connecting piece 11 and the outer connecting piece 12 are spliced and fixed into a whole. The rib plates 16 at the four outer corners of the inner connecting member 11 and the outer connecting member 12 have the same shape and size, and the bolt holes 17 of the rib plates 16 are symmetrically arranged.
In the embodiment, the diameters of the upper opening and the lower opening are slightly smaller than the diameter of the steel pipe arch section 2, so that the steel pipe arch section 2 can be embedded into the steel pipe arch section, and slurry does not leak between the upper opening and the steel pipe arch section 2 and between the lower opening and the steel pipe arch section 2; the diameter of the front opening 18 and the rear opening 19 is slightly smaller than the diameter of the longitudinal connector 3, so that the longitudinal connector 3 can be inserted into the front opening 18 and the rear opening 19, and slurry cannot leak between the front opening 18 and the longitudinal connector 3 and between the rear opening 19 and the longitudinal connector 3.
As shown in fig. 3, this embodiment further provides a tunnel supporting system, which includes a plurality of steel pipe arches arranged at intervals along the longitudinal direction, adjacent steel pipe arches are connected by a plurality of longitudinal connecting members 3, and each steel pipe arch is formed by annularly splicing a plurality of steel pipe arch segments 2; the joints of the steel tube arch sections 2 and the longitudinal connecting pieces 3 are connected by the connecting device 1, and concrete is poured into the steel tube arch and the connecting device 1. Because the same node is used between the steel pipe arch frame sections 2 and between the longitudinal connecting pieces 3, the node is annularly and upwards opposite to the outer connecting piece 12 through the inner connecting piece 11 of the connecting device 1 to buckle and wrap the node spliced by the steel pipe arch frame sections 2, and then the node is locked through the high-strength connecting bolts 13 arranged along the annular direction, the longitudinal connecting pieces 3 are respectively embedded into the front opening 18 and the rear opening 19 of the connecting device 1 in the longitudinal direction, and then the node is locked through the high-strength connecting bolts 13 arranged along the longitudinal direction, the construction process is simplified, the construction efficiency is improved, and the integrity and the stability of a supporting system are improved.
Further, the longitudinal connecting piece 3 is a steel pipe or a steel pipe concrete short column, and when the longitudinal connecting piece 3 is a steel pipe, the steel pipe arch frame, the longitudinal connecting piece 3 and the connecting device 1 are formed by one-step pouring, so that the integrity is improved; the steel pipe arch is made of basalt composite fiber steel pipes, the connecting device 1 is made of basalt composite fiber semicircular steel pipes, and basalt composite fiber materials are coated outside the steel pipes, so that the steel pipe arch has high compression strength and high shear strength, and the arch is high in bearing capacity and high in deformation resistance.
The embodiment also provides a construction method of the tunnel supporting system, which comprises the following steps:
firstly, conveying a steel pipe arch frame section prefabricated in a factory to a specified position in a tunnel by using a conveying device;
step two, clamping and lifting the two steel pipe arch sections by a steel arch assembling machine to butt the steel pipe arch sections along the inner wall of the tunnel;
thirdly, the outer connecting piece 12 is pressed close to the butt joint of the steel pipe arch sections wrapped by the surrounding rock, and the inner connecting piece 11 is placed in parallel and symmetrical to the outer connecting piece 12 and wraps the butt joint of the steel pipe arch sections;
step four, embedding the longitudinal connecting piece 3 of the previous ring into a front opening 18 of the connecting device 1 formed by the inner connecting piece 11 and the outer connecting piece 12 in the longitudinal direction, and taking the other longitudinal connecting piece 3 and a rear opening 19 of the connecting device 1;
step five, sequentially penetrating the high-strength connecting bolt 13 through the butted inner connecting piece 11 and outer connecting piece 12, correspondingly assembling a nut and screwing;
sixthly, repeating the steps until a plurality of steel pipe arch sections are assembled into a ring;
and seventhly, after a plurality of steel pipe arches are connected and fixed through the longitudinal connecting pieces 3, injecting concrete into all the steel pipes through the grouting holes in the inner connecting pieces 11 to form a complete tunnel supporting system.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a tunnel steel pipe type bow member high-speed joint device that excels in which: comprises an inner connecting piece, an outer connecting piece and a high-strength connecting bolt; interior connecting piece is used for installing in contact tunnel headroom one side, outer connecting piece is used for installing in contact country rock one side, interior connecting piece with the relative lock of outer connecting piece to form cross hollow structure through the high-strength connecting bolt connection, cross hollow structure has preceding opening and the back opening that is used for the hoop to connect the steel pipe bow member festival section with the under shed and is used for longitudinal connection longitudinal tie spare.
2. The tunnel steel pipe type arch frame high-strength quick connecting device of claim 1, wherein: and the inner connecting piece is provided with a grouting hole.
3. The tunnel steel pipe type arch frame high-strength quick connecting device of claim 1, wherein: the inner connecting piece and the outer connecting piece both comprise longitudinal semicircular pipes and annular semicircular pipes which are arranged in a cross manner, and the buckling surfaces of the longitudinal semicircular pipes and the annular semicircular pipes are on the same plane; the longitudinal semicircular pipe is provided with a semicircular hole for the circumferential semicircular pipe to pass through, or the circumferential semicircular pipe is provided with a semicircular hole for the longitudinal semicircular pipe to pass through.
4. The tunnel steel pipe type arch frame high-strength quick connecting device of claim 3, wherein: ribs are arranged at four outer corners of the inner connecting piece and the outer connecting piece respectively, a plurality of bolt holes are arranged on the ribs at intervals, and the bolt holes on the inner connecting piece and the outer connecting piece are in one-to-one correspondence and are connected through high-strength connecting bolts respectively.
5. The tunnel steel pipe type arch frame high-strength quick connecting device according to claim 4, wherein: the rib plate is L-shaped, and two sides of the rib plate are respectively connected with the longitudinal semicircular pipe and the annular semicircular pipe.
6. The tunnel steel pipe type arch frame high-strength quick connecting device of claim 5, wherein: and a plurality of bolt holes are arranged on two sides of the rib plate at intervals.
7. The tunnel steel pipe type arch frame high-strength quick connecting device according to claim 1, wherein: the diameters of the upper opening and the lower opening are slightly smaller than the diameter of the steel pipe arch frame section.
8. The tunnel steel pipe type arch frame high-strength quick connecting device according to claim 1, wherein: the diameter of the front opening and the rear opening is slightly smaller than the diameter of the longitudinal connecting piece.
9. A tunnel supporting system comprises a plurality of steel pipe arches which are arranged at intervals along the longitudinal direction, wherein adjacent steel pipe arches are connected through a plurality of longitudinal connecting pieces, and each steel pipe arch is formed by splicing a plurality of steel pipe arch sections along the circumferential direction; the method is characterized in that: the steel tube arch segments are connected with the joints of the longitudinal connectors by using the connecting device according to any one of claims 1 to 8, and the steel tube arch and the connecting device are poured with concrete.
10. A tunnel support system as claimed in claim 9, wherein: the longitudinal connecting piece adopts a steel pipe or a steel pipe concrete short column, the steel pipe arch frame adopts a basalt composite fiber steel pipe, and the connecting device adopts a basalt composite fiber semicircular steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222314476.5U CN217976237U (en) | 2022-08-31 | 2022-08-31 | Tunnel steel pipe type arch frame high-strength quick connecting device and tunnel supporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222314476.5U CN217976237U (en) | 2022-08-31 | 2022-08-31 | Tunnel steel pipe type arch frame high-strength quick connecting device and tunnel supporting system |
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| Publication Number | Publication Date |
|---|---|
| CN217976237U true CN217976237U (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222314476.5U Active CN217976237U (en) | 2022-08-31 | 2022-08-31 | Tunnel steel pipe type arch frame high-strength quick connecting device and tunnel supporting system |
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|---|---|
| CN (1) | CN217976237U (en) |
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- 2022-08-31 CN CN202222314476.5U patent/CN217976237U/en active Active
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