CN213016380U - Surrounding rock tunnel preliminary bracing steelframe - Google Patents
Surrounding rock tunnel preliminary bracing steelframe Download PDFInfo
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- CN213016380U CN213016380U CN202020390047.4U CN202020390047U CN213016380U CN 213016380 U CN213016380 U CN 213016380U CN 202020390047 U CN202020390047 U CN 202020390047U CN 213016380 U CN213016380 U CN 213016380U
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- steel grating
- fixedly connected
- tunnel
- guide steel
- support frame
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Abstract
The utility model belongs to the technical field of the tunnel preliminary bracing, concretely relates to steel frame is strutted in country rock tunnel preliminary bracing, the problem that the country rock deformation of rapid development leads to the safety risk easily when having solved conventional grid steelframe under the unfavorable geological tunnel construction condition and being not enough to resist tunnel excavation, lead the steel grating under including, lead the steel grating in the steel grating upper end fixedly connected with, lead the steel grating on the fixedly connected with of steel grating upper end in well, lead steel grating lower extreme fixedly connected with invert steel grating down, on lead the steel grating below and be provided with the support frame, support frame below fixedly connected with supports the base. The utility model discloses can change the height of support frame, adapt to the not high country rock tunnel support of co-altitude, steel grating can provide stronger intensity and rigidity to early country rock tunnel, and the conventional grid steelframe is not enough to resist the country rock deformation of rapid development when tunnel excavation leads to the safety risk easily under the adverse geology tunnel construction condition more effectively.
Description
Technical Field
The utility model belongs to the technical field of the tunnel preliminary bracing, concretely relates to surrounding rock tunnel preliminary bracing steelframe.
Background
The primary support formed by grid steel frames or section steel frames, anchor rods and sprayed concrete is generally adopted to resist the deformation of weak surrounding rocks after the tunnel is excavated. At present, most of the commonly used grid steel frames are formed by combining 4 main steel bars and a certain amount of stirrups. Compared with the steel frame made of section steel, the grid steel frame has the advantages of good economical efficiency, good adherence with sprayed concrete, portability, flexibility, convenience for construction and erection and the like, but also has the outstanding problems of insufficient early strength and rigidity and the like.
For example, under the condition of poor tunnel geological conditions, such as lava geology, karst cave geology or geological conditions with large water content, surrounding rock deformation which is rapidly developed after tunnel excavation is difficult to resist by using the existing grid steel frame, and whether a novel grid steel frame capable of improving early strength and rigidity exists is extremely important.
Disclosure of Invention
The utility model discloses a conventional grid steelframe is not enough to resist the problem that the country rock deformation of rapid development leads to the safety risk easily when tunnel excavation under the adverse geology tunnel construction condition, provides a country rock tunnel preliminary bracing steelframe.
The utility model discloses a realize through following technical scheme: the utility model provides a surrounding rock tunnel preliminary bracing steelframe, lead steel grating including down, lead steel grating in the steel grating upper end fixedly connected with down, lead steel grating on the well steel grating upper end fixedly connected with, lead steel grating lower extreme fixedly connected with invert steel grating down, it is provided with the support frame to lead steel grating below on, support frame below fixedly connected with supports the base, the support base passes through stationary blade and tunnel bottom fixed connection, support frame upper end fixed mounting has perpendicular bracing piece, support frame middle part both sides fixed mounting has the bearing diagonal, support frame fixed mounting has the anchor strut, lead steel grating down, well steel grating, on lead the inside equal fixed mounting of steel grating and invert steel grating and consolidate the reinforcing bar, it has the stirrup to consolidate the horizontal fixed mounting of reinforcing bar.
The supporting base top is provided with the connecting hole, it has the bolt round pin to support the base transversely to run through, the support frame lower extreme passes through the connecting hole to be installed in supporting the base, the support frame lower extreme is provided with a plurality of bolt pinhole, bolt round pin and bolt pinhole threaded connection, the stationary blade four corners is provided with the reinforcement hole, the stationary blade is through reinforcing hole and expansion bolts and tunnel bottom fixed connection, through the connection of adjusting bolt round pin and bolt pinhole, the height of support frame can be adjusted, be applicable to not high tunnel.
Preferably, lead under and lead between the steel grating and well and lead in and lead between the steel grating and the last steel grating and connect including flange piece, connecting bolt and nut, the equal fixedly connected with flange piece of the steel grating of both sides, it has connecting bolt to run through between two flange pieces, threaded connection has the nut on the outer connecting bolt of two flange pieces, connect through two flange pieces and connecting bolt between two adjacent steel gratings, only need screw up the nut and can make two steel grating fixed connection.
The first connecting block is movably connected between the connecting flange pieces, the connecting shaft penetrates through the first connecting block, and the first connecting block is rotatably connected with the second connecting block through the connecting shaft.
Compared with the prior art, the utility model has the advantages that:
(1) the utility model discloses during the use, after the initial excavation of country rock tunnel, lead the steel grating under in tunnel excavation contour line installation piecing together, in lead the steel grating, on lead the steel grating and be located the invert steel grating of tunnel bottom, provide intensity and rigidity support for country rock tunnel initial stage, erect bracing piece and bearing diagonal pole and provide the supporting role for the steel grating, it is unlikely to warp to consolidate reinforcing bar and stirrup and guarantees the structure of steel grating, the bolt pinhole can change the height of support frame with the cooperation of bolt pin, adapt to the not high country rock tunnel support of co-altitude, the steel grating can provide stronger intensity and rigidity to early country rock tunnel, more can effectively resist under the unfavorable geological tunnel construction condition conventional grid steelframe and be not enough to resist the country rock deformation of rapid development when tunnel excavation and lead to the safety risk easily.
(2) The utility model discloses be provided with the flange piece, can adjust the distance of two flange pieces through the outer nut of adjustment flange piece, it can be fixed with two flange pieces to screw up the nut to with adjacent steel grating fixed connection, can put into first connecting block between one flange piece, it can be fixed with two flange connection pieces to screw up the nut, the second connecting block is perpendicular with the support frame, can become the perpendicular bracing piece and the bearing diagonal pole that have the supporting role.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the steel grating structure of the present invention;
FIG. 3 is a schematic view of the supporting base structure of the present invention;
FIG. 4 is a schematic view of the connection structure of the support frame and the bolt pin of the present invention;
FIG. 5 is a schematic view of the connection structure of the support rod and the steel grating of the present invention;
fig. 6 is a schematic view of a connection structure of the first connection block and the second connection block of the present invention.
In the figure: 1-lower steel guide grid, 2-middle steel guide grid, 3-upper steel guide grid, 4-inverted arch steel guide grid, 5-vertical support rod, 6-support frame, 7-reinforcing rod, 8-inclined support rod, 9-support base, 10-fixing piece, 11-reinforcing steel bar, 12-stirrup, 13-connecting hole, 14-bolt pin, 15-bolt pin hole, 16-reinforcing hole, 17-connecting flange piece, 18-connecting bolt, 19-nut, 20-first connecting block, 21-second connecting block and 22-connecting shaft.
Detailed Description
The present invention will be further described with reference to fig. 1 to 6 in conjunction with the embodiments.
Example 1: referring to fig. 1, a surrounding rock tunnel preliminary bracing steelframe, including leading steel grating 1 down, lead steel grating 2 in leading 1 upper end fixedly connected with of steel grating down, lead steel grating 3 on leading 2 upper end fixedly connected with of steel grating down, lead 1 lower extreme fixedly connected with invert steel grating 4 of steel grating down, it is provided with support frame 6 to lead 3 below of steel grating on, support frame 6 below fixedly connected with supports base 9, support base 9 passes through stationary blade 10 and ground fixed connection, 6 upper ends fixed mounting of support frame has vertical support rod 5, 6 middle part both sides fixed mounting of support frame has bearing diagonal 8, 6 fixed mounting of support frame has anchor strut 7, lead steel grating 1 down, well steel grating 2, lead inside equal fixed mounting of steel grating 3 and invert steel grating 4 on and have reinforcing bar 11, reinforcing bar 11 horizontal fixed mounting has stirrup 12.
Support 9 top of base and be provided with connecting hole 13, support base 9 transversely runs through there is bolt pin 14, and 6 lower extremes of support frame pass through connecting hole 13 to be installed in supporting base 9, and 6 lower extremes of support frame are provided with a plurality of bolt pinhole 15, bolt pin 14 and bolt pinhole 15 threaded connection, and four angular position of stationary blade 10 are provided with reinforcing hole 16, and stationary blade 10 is through reinforcing hole 16 and expansion bolts and tunnel bottom fixed connection.
When the utility model is used, after the initial excavation of the surrounding rock tunnel, the lower guide steel grating 1 and the middle guide steel grating 2 which are assembled together are installed on the tunnel excavation contour line, go up and lead steel grating 3 and be located the inverted arch steel grating 4 of tunnel bottom, supporting seat 9 is through reinforcing hole 16 and expansion bolts and tunnel bottom fixed connection on the stationary blade 10, install support frame 6 on the supporting seat 9, it provides the supporting role for steel grating to install vertical support pole 5 and bearing diagonal pole 8 on the support frame 6, the inside fixed mounting of steel grating has reinforcing bar 11, reinforcing bar 11 transversely installs stirrup 12, guarantee that steel grating's structure is unlikely to warp, 6 lower extremes of support frame and connecting hole 13 match, bolt pinhole 15 can change the height of support frame 6 with 14 cooperations of bolt pin, adapt to not co-altitude country rock tunnel support, steel grating can provide stronger intensity and rigidity to early country rock tunnel.
Example 2: referring to fig. 5 and 6, the difference between the steel grids 1 and 2 and between the steel grids 2 and 3 is that the joints between the steel grids 1 and 2 include connecting flange pieces 17, connecting bolts 18 and nuts 19, the steel grids on both sides are fixedly connected with the connecting flange pieces 17, the connecting bolts 18 penetrate between the two connecting flange pieces 17, and the nuts 19 are connected to the connecting bolts 18 outside the two connecting flange pieces 17 through threads.
The first connecting block 20 is movably connected between the connecting flange pieces 17, the connecting shaft 22 penetrates through the first connecting block 20, and the first connecting block 20 is rotatably connected with the second connecting block 21 through the connecting shaft 22. The utility model discloses be provided with flange piece 17, connect through connecting bolt 18 between two flange pieces 17, can adjust the distance of two flange pieces through adjusting the outer nut 19 of flange piece 17, it can be fixed with two flange pieces 17 to screw up nut 19, thereby with adjacent steel grating fixed connection, can put into first connecting block 20 between the connection flange piece 17, it can be fixed with first connecting block 20 and two flange connection pieces 17 to screw up nut 19, first connecting block 20 rotates through inside connecting axle 22 with second connecting block 21 and is connected.
Claims (2)
1. The utility model provides a surrounding rock tunnel preliminary bracing steelframe which characterized in that: comprises a lower guide steel grating (1), a middle guide steel grating (2) is fixedly connected at the upper end of the lower guide steel grating (1), an upper guide steel grating (3) is fixedly connected at the upper end of the middle guide steel grating (2), an inverted arch steel grating (4) is fixedly connected at the lower end of the lower guide steel grating (1), a support frame (6) is arranged below the upper guide steel grating (3), a support base (9) is fixedly connected below the support frame (6), the support base (9) is fixedly connected with the bottom of a tunnel through a fixing piece (10), a vertical support rod (5) is fixedly arranged at the upper end of the support frame (6), oblique support rods (8) are fixedly arranged at two sides of the middle part of the support frame (6), reinforcing rods (7) are fixedly arranged on the support frame (6), reinforcing steel bars (11) are fixedly arranged in the lower guide steel grating (1), the middle guide steel grating (2), the upper guide steel grating (, the reinforcement steel bar (11) is transversely and fixedly provided with a stirrup (12); the top end of the supporting base (9) is provided with a connecting hole (13), a bolt pin (14) transversely penetrates through the supporting base (9), the lower end of the supporting frame (6) is installed in the supporting base (9) through the connecting hole (13), the lower end of the supporting frame (6) is provided with a plurality of bolt pin holes (15), the bolt pin (14) is in threaded connection with the bolt pin holes (15), reinforcing holes (16) are formed in four corners of the fixing piece (10), and the fixing piece (10) is fixedly connected with the bottom of the tunnel through the reinforcing holes (16) and the expansion bolts; the joints between the lower guide steel grating (1) and the middle guide steel grating (2) and between the middle guide steel grating (2) and the upper guide steel grating (3) comprise connecting flange pieces (17), connecting bolts (18) and nuts (19), the steel gratings on two sides are fixedly connected with the connecting flange pieces (17), the connecting bolts (18) penetrate between the two connecting flange pieces (17), and the two connecting flange pieces (17) are connected with the nuts (19) through the outer connecting bolts (18) in a threaded manner.
2. The surrounding rock tunnel preliminary bracing steelframe of claim 1, characterized by: the first connecting block (20) is movably connected between the connecting flange pieces (17), the connecting shaft (22) penetrates through the first connecting block (20), and the first connecting block (20) is rotatably connected with the second connecting block (21) through the connecting shaft (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020390047.4U CN213016380U (en) | 2020-03-25 | 2020-03-25 | Surrounding rock tunnel preliminary bracing steelframe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020390047.4U CN213016380U (en) | 2020-03-25 | 2020-03-25 | Surrounding rock tunnel preliminary bracing steelframe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213016380U true CN213016380U (en) | 2021-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020390047.4U Active CN213016380U (en) | 2020-03-25 | 2020-03-25 | Surrounding rock tunnel preliminary bracing steelframe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213016380U (en) |
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2020
- 2020-03-25 CN CN202020390047.4U patent/CN213016380U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20230417 Address after: No. 51, Bosheng Village, Changbin Road, Xiuying District, Haikou City, Hainan Province, 570312 Patentee after: China Railway 12th Bureau Group Hainan Engineering Co.,Ltd. Patentee after: THE 2ND ENGINEERING CO.,LTD. OF CHINA RAILWAY 12TH BUREAU GROUP Patentee after: CHINA RAILWAY 12TH BUREAU GROUP Co.,Ltd. Address before: 030032 No. 19 South Renmin Road, Xiaodian District, Shanxi, Taiyuan Patentee before: THE 2ND ENGINEERING CO.,LTD. OF CHINA RAILWAY 12TH BUREAU GROUP Patentee before: CHINA RAILWAY 12TH BUREAU GROUP Co.,Ltd. |