CN216043771U - Mechanical connecting device for longitudinal steel bars of tunnel steel arch frame - Google Patents
Mechanical connecting device for longitudinal steel bars of tunnel steel arch frame Download PDFInfo
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- CN216043771U CN216043771U CN202122490690.1U CN202122490690U CN216043771U CN 216043771 U CN216043771 U CN 216043771U CN 202122490690 U CN202122490690 U CN 202122490690U CN 216043771 U CN216043771 U CN 216043771U
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Abstract
The utility model relates to a mechanical connecting device for longitudinal steel bars of a tunnel steel arch, belonging to the field of tunnel construction and comprising a connecting steel plate, longitudinal connecting steel bars, a fixing device and a steel arch; the connecting steel plate and the steel arch frame are welded into a whole; a first hole and a second hole are respectively formed in the two ends of the connecting steel plate; the longitudinal connecting steel bar penetrates through the first hole or the second hole, and the fixing device is used for locking the longitudinal connecting steel bar with the first hole or the second hole to form an integral stress system. The steel arch truss has the advantages that through the non-welding connection structure of the longitudinal connecting steel bars, not only is the fire source causing gas explosion reduced, but also the steel arch truss is firmly connected, meets the construction requirements of different working conditions, and is convenient to construct and high in efficiency.
Description
Technical Field
The utility model belongs to the field of tunnel construction, and particularly relates to a longitudinal mechanical connecting device for a steel arch frame.
Background
In the construction process of high gas tunnels, gas combustion and explosion accidents are often caused by the fact that gas prevention and control measures are not in place. The important point for preventing gas explosion is to control the ignition source. In the primary support process of the tunnel, the traditional longitudinal connecting steel bar and the steel arch frame are connected by adopting a welding process, and high-temperature sparks are inevitably generated by welding, so that gas accidents are caused. In order to solve the problem, people change the traditional welding operation of longitudinal connecting steel bars and steel arches into mechanical connection, and avoid the fire operation in a high-gas tunnel, thereby reducing the occurrence of gas accidents and ensuring the safety of operating personnel in the tunnel.
Chinese utility model CN209925006U discloses a fire-free connection assembly for primary arch centering of a high-gas tunnel, wherein a connection rib connection plate is welded at a preset position of the primary arch centering of the tunnel, and connection holes are arranged on the connection rib connection plate and positioned at two sides of the arch centering; two ends of the connecting rib are respectively welded with a connecting rib plate, wherein the connecting rib plate at one end is provided with a fixed hole, and the connecting rib plate at the other end is provided with a movable hole; the connecting ribs are arranged between adjacent tunnel primary arch centering, namely, one end of each connecting rib is fixedly connected with a connecting hole of a connecting rib connecting plate preset on the tunnel primary arch centering through a connecting bolt, and the other end of each connecting rib is fixedly connected with a connecting hole of a connecting rib connecting plate preset on the adjacent tunnel primary arch centering through a movable hole of the connecting rib plate. The fire-extinguishing connecting component can effectively reduce the fire source causing gas explosion, but has the defect that the connecting position of the connecting steel bar is arranged outside the arch center instead of the inner side and the outer side. The device is difficult to be normally installed in actual construction, and the practicability is extremely poor.
The Chinese patent CN112127913A discloses a longitudinal mechanical connection method for steel arches, which is characterized in that preformed holes are respectively arranged at the arch crown, the bottom and the arch waist of each steel arch, clamping plates with holes are respectively arranged in front of and behind the preformed holes of each steel arch, and the steel arches arranged in front and at the back are connected through connecting ribs with screw openings. The disadvantage of this connection is that the need to open holes in the steel arch web affects the overall structure of the steel arch, and in many construction designs it is explicitly forbidden to open holes in the web.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the longitudinal connection process of the steel arch, the utility model provides a novel steel arch longitudinal mechanical connection device without fire by improving the traditional welding process of connecting reinforcing steel bars. Specifically, the utility model discloses the following technical scheme:
a mechanical connecting device for longitudinal steel bars of a tunnel steel arch comprises connecting steel plates, longitudinal connecting steel bars, a fixing device and a steel arch. The connecting steel plate and the steel arch frame are welded into a whole; a first hole and a second hole are respectively formed in the two ends of the connecting steel plate; the longitudinal connecting steel bar penetrates through the first hole or the second hole, and the fixing device is used for locking the longitudinal connecting steel bar with the first hole or the second hole.
In actual operation, at the site of site prefabrication, the connecting steel plate is welded with the steel arch frame in advance to form a whole. And in a construction site, the longitudinal connecting steel bars sequentially penetrate through the first holes of the connecting steel plates on the two adjacent steel arch frames, and the longitudinal connecting steel bars and the first holes are locked by a fixing device, so that the longitudinal connection of the adjacent steel arch frames can be realized. Then another longitudinal connecting steel bar is used for connecting an adjacent steel arch frame, the longitudinal connecting steel bar sequentially penetrates through second holes in the connecting steel plates of the two adjacent steel arch frames, and the other longitudinal connecting steel bar is locked with the second holes by a fixing device, so that the longitudinal connection of the three adjacent steel arch frames can be realized. The process is repeated, so that the longitudinal connection of a series of steel arches can be realized.
Preferably, the end of the longitudinal connecting steel bar is provided with an external thread; the fixing device is a connecting sleeve and is provided with an internal thread; the longitudinal connecting steel bar external thread corresponds to the connecting sleeve internal thread, and the longitudinal connecting steel bar can be locked with the first hole or the second hole. In actual construction, the external threads of the longitudinal connecting steel bars are rolled by a rolling machine tool in a prefabricating and processing factory, and the rolled threads are formed at one time. After the construction of the primary steel arch and the longitudinal connecting steel bars is finished, the longitudinal connecting steel bars and the steel arch connecting steel plates are bolted together through the connecting sleeves to form an integral stress system.
Preferably, one end of the longitudinal connecting steel bar is provided with an external thread, and the other end is a fixed end. The minimum diameter of the fixed end of the longitudinal connecting steel bar is larger than the maximum diameter of the first hole or the second hole; the fixing device is a connecting sleeve provided with internal threads; the longitudinal connecting steel bar external thread corresponds to the connecting sleeve internal thread, and the longitudinal connecting steel bar can be locked with the first hole or the second hole. When the connecting sleeve is used, the threaded end of the longitudinal connecting steel bar sequentially penetrates through the first hole or the second hole, then the threaded end of the longitudinal connecting steel bar is screwed by the connecting sleeve, and the longitudinal connecting steel bar is locked with the first hole or the second hole.
The utility model has the advantages that through the non-welding connection structure of the longitudinal connection reinforcing steel bar, not only the fire source causing gas explosion is reduced, but also the steel arch frame is firmly connected, meets the construction requirements of different working conditions, and has convenient construction and high efficiency.
Drawings
FIG. 1 is a side view of the present invention;
fig. 2 is a front view of the present invention.
Description of reference numerals: connecting steel plate 1, vertical connecting reinforcement 2, connecting sleeve 3, steel bow member 4.
Detailed Description
The utility model will be further described and explained with reference to fig. 1 and 2, and a preferred embodiment of the utility model.
The utility model provides a tunnel steel bow member longitudinal reinforcement mechanical connection device, contains connecting steel plate 1, longitudinal connection reinforcing bar 2, connecting sleeve 3 and steel bow member 4. The connecting steel plate 1 and the steel arch frame 4 are welded into a whole; and a first hole and a second hole are respectively arranged at two ends of the connecting steel plate 1. The connecting steel plate 1 is welded when the primary steel arch frame 4 is processed in a prefabrication field, a first hole and a second hole are respectively formed in the two ends of the connecting steel plate 1, and the diameter of the hole needs to be larger than that of the longitudinal connecting steel bar 2, so that the longitudinal connecting steel bar 2 can be conveniently inserted.
The diameter of the longitudinal connecting steel bar 2 is 4 mm. One end of the screw thread is rolled by a rolling machine tool in a processing factory in advance, the screw thread is formed at one time, and the length of the screw thread needs to meet the requirement of the specification. The other end of the longitudinal connecting steel bar 2 is a fixed end, and the minimum diameter of the fixed end is larger than the maximum diameter of the first hole or the second hole. The connecting sleeve 3 is provided with an internal thread. The external threads of the longitudinal connecting steel bars 2 correspond to the internal threads of the connecting sleeve 3, so that the longitudinal connecting steel bars 2 can be locked with the first holes or the second holes. When the connecting device is used, the threaded end of the longitudinal connecting steel bar 2 sequentially penetrates through the first hole or the second hole, the threaded end of the longitudinal connecting steel bar 2 is screwed by the connecting sleeve 3, and then the longitudinal connecting steel bar 2 is locked with the first hole or the second hole, so that the longitudinal connecting steel bar 2 and the connecting steel plate 1 of the steel arch frame 4 are bolted together through the connecting sleeve 3, and an integral stress system is formed.
It should be expressly noted that the above-mentioned embodiments and figures do not limit the utility model in any way. Any technical solutions identical or similar to those of the connecting steel plate, the longitudinal connecting steel bar and the fixing device of the present invention are not beyond the protection scope of the claims of the present invention as long as they are not creative efforts of those skilled in the art.
Claims (3)
1. A longitudinal steel bar mechanical connecting device of a tunnel steel arch comprises a connecting steel plate (1) and a steel arch (4); the connecting steel plate (1) and the steel arch frame (4) are welded into a whole; the connecting steel plate is characterized in that a first hole and a second hole are respectively formed in two ends of the connecting steel plate (1); the mechanical connecting device for the longitudinal steel bars of the tunnel steel arch frame further comprises longitudinal connecting steel bars (2) and a fixing device, and the longitudinal connecting steel bars (2) can penetrate through the first holes or the second holes; the fixing device is used for locking the longitudinal connecting steel bar (2) with the first hole or the second hole.
2. A mechanical connection device for longitudinal steel bars of tunnel steel arch according to claim 1, characterized in that the ends of the longitudinal connection steel bars (2) are provided with external threads; the fixing device is a connecting sleeve (3) provided with internal threads; the external thread of the longitudinal connecting steel bar (2) corresponds to the internal thread of the connecting sleeve (3).
3. A mechanical connection device for longitudinal steel bars of tunnel steel arch according to claim 2, characterized in that one end of the longitudinal connection steel bar (2) is provided with external thread and the other end is a fixed end; the minimum diameter of longitudinal tie bar (2) stiff end is greater than the maximum diameter of first hole or second hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122490690.1U CN216043771U (en) | 2021-10-14 | 2021-10-14 | Mechanical connecting device for longitudinal steel bars of tunnel steel arch frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122490690.1U CN216043771U (en) | 2021-10-14 | 2021-10-14 | Mechanical connecting device for longitudinal steel bars of tunnel steel arch frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216043771U true CN216043771U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122490690.1U Active CN216043771U (en) | 2021-10-14 | 2021-10-14 | Mechanical connecting device for longitudinal steel bars of tunnel steel arch frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216043771U (en) |
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2021
- 2021-10-14 CN CN202122490690.1U patent/CN216043771U/en active Active
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