CN116950687B - Tunnel supporting system penetrating through multilayer goaf and construction method thereof - Google Patents
Tunnel supporting system penetrating through multilayer goaf and construction method thereof Download PDFInfo
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- CN116950687B CN116950687B CN202311211929.4A CN202311211929A CN116950687B CN 116950687 B CN116950687 B CN 116950687B CN 202311211929 A CN202311211929 A CN 202311211929A CN 116950687 B CN116950687 B CN 116950687B
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- 230000000149 penetrating effect Effects 0.000 title claims abstract description 12
- 238000010276 construction Methods 0.000 title abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims abstract description 58
- 239000011435 rock Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 4
- 238000005065 mining Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
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- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel supporting system penetrating through a multilayer goaf and a construction method thereof, and relates to the technical field of tunnel supporting, wherein the tunnel supporting system comprises a concrete supporting beam and a connecting assembly connected with the concrete supporting beam, the connecting assembly is uniformly arranged along the end part of the concrete supporting beam and comprises a I-shaped frame, two ends of the I-shaped frame are provided with connecting screw steels, the connecting screw steels are connected with the end part of the concrete supporting beam, the connecting assembly is provided with a telescopic mechanism, the telescopic mechanism is connected with a positioning frame II, a tensioning mechanism is arranged between the telescopic mechanism and the positioning frame II, the positioning frame II and a tunnel rock wall are connected through concrete pouring, and a center tensioning mechanism is arranged between the telescopic mechanism and the I-shaped frame; the deformation quantity is provided through the telescopic mechanism, the stable support is ensured, and the central tensioning mechanism and the tensioning mechanism are combined to provide a good support effect on the mining subsidence part.
Description
Technical Field
The invention relates to the technical field of tunnel support, in particular to a tunnel support system penetrating through a multilayer goaf and a construction method thereof.
Background
Goaf refers to a hollow area left after underground mineral products are mined, and can be divided into an old mining area, a present mining area and a future mining area according to the mining time of the mineral products. After the ore body is extracted, a three-collapse zone, a water guide fracture zone and a bending zone are formed upwards from the roof strata. After the mining is completed, the overlying strata is lost to support, the original balance condition is destroyed, so that the overlying strata is deformed in a moving way until collapse is destroyed, and finally various buildings on the ground are deformed and destroyed, and the ground is sunk and sunken in a large area.
With the continuous development of domestic road traffic, the tunnel inevitably encounters a poor geological section of the goaf. In the past, the hazard recognition of the goaf is insufficient, and the goaf is often hurriedly passed when being traversed, so that the tunnel is damaged to different degrees in construction and operation stages, such as broken lining structures, intrusion limits of tunnel outlines and the like. The tunnel supporting system is used for protecting the safety of a tunnel, but the existing tunnel supporting system cannot adapt to the uneven settlement of the tunnel caused by the collapse of the goaf, so that the safety of the tunnel in the uneven settlement process cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a tunnel supporting system penetrating through a multilayer goaf and a construction method thereof, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a pass through tunnel support system in multilayer goaf, includes concrete supporting beam and the coupling assembling who links to each other between with the concrete supporting beam, coupling assembling evenly sets up along the tip of concrete supporting beam, coupling assembling includes the spool, the both ends of spool are provided with the connection screw thread steel, the end connection of connection screw thread steel and concrete supporting beam, be provided with telescopic machanism on the coupling assembling, telescopic machanism is connected with locating rack II, be provided with straining device between telescopic machanism and the locating rack II, be connected through concrete placement between locating rack II and straining device and the tunnel rock wall, be provided with central straining device between telescopic machanism and the spool.
The telescopic mechanism comprises a telescopic groove arranged at the center of the I-shaped frame, a plug-in shaft is arranged in the telescopic groove, connecting discs are arranged at two ends of the plug-in shaft, annular grooves are formed in the side edges of the connecting discs, connecting frames are arranged in the annular grooves in a matched mode, the end portions of the connecting frames are rotationally connected with first sliding frames, arc clamping blocks are arranged on the connecting frames, the radius of an arc of each arc clamping block is equal to the radius of a circle of each annular groove, the connecting frames are arranged between the arc clamping blocks and the annular grooves in a sliding mode, the first sliding frames are connected with the edges of the I-shaped frame in a sliding mode in a clamping mode, fixing plates are symmetrically arranged at two ends of the telescopic groove, first clamping grooves and second clamping grooves are formed in the first fixing plates in a matched mode, second clamping grooves are arranged in the matched mode with the edges of the I-shaped frame, and first plunger springs are arranged between the first positioning frames and the first sliding frames.
As a further scheme of the invention: the center tensioning mechanism comprises a middle frame, one end of the middle frame is fixedly connected with a plug-in shaft, the other end of the middle frame is connected with a shape returning frame, the center tensioning mechanism further comprises a first adjusting groove arranged on the shape returning frame, a second adjusting groove is arranged on the inner side of the shape returning frame, a plug-in groove is arranged on a second positioning frame, the second positioning frame is matched with the second adjusting groove of the shape returning frame through the plug-in groove, a clamping flange is arranged at the end of the plug-in groove, the clamping flange is connected with the second adjusting groove in a locking mode through a clamping bolt, a second sliding frame is slidably arranged on the first adjusting groove, a connecting rod is rotatably arranged at one end of the second sliding frame, a rotary connecting portion is arranged on the first sliding frame, a plunger spring II is rotatably connected between the connecting rod and the rotary connecting portion, a tensioning mechanism is arranged between the other end of the second sliding frame and the second positioning frame, and the shape returning frame is connected with the second positioning frame through the tensioning mechanism.
As still further aspects of the invention: the tensioning mechanism comprises a tensioning frame arranged at the end part of the inserting groove, the tensioning frame is arranged on the inner side of the square frame, a connecting flange is arranged on the tensioning frame, a connecting steel cable is arranged between the connecting flange and the second sliding frame, a positioning plate is arranged in the square frame, tensioning steel cables are uniformly arranged on the positioning plate, the other ends of the tensioning steel cables penetrate out of the end part of the second positioning frame, the tensioning steel cables penetrate through the second positioning frame and are connected with positioning screw-thread steel, and the positioning screw-thread steel is fixed in a tunnel rock wall in an penetrating mode.
As still further aspects of the invention: the end of the middle frame is provided with a splicing groove, one end of the splicing groove is opened, the other end of the splicing groove is closed, the edge of the square frame is provided with splicing blocks, the square frame is installed through matching between the splicing blocks and the splicing groove, and the open end of the splicing groove is screwed with a locking bolt.
As still further aspects of the invention: the connecting frame is connected with the sliding frame I in a matched mode, and the connecting screw thread is connected with the sliding frame I through screw threads.
As still further aspects of the invention: the tensioning steel ropes are symmetrically arranged on two sides of the second locating frame, and the tensioning steel ropes, the locating screw thread steel and the second locating frame are in tensioning connection through nuts.
As still further aspects of the invention: the first sliding frame is symmetrically arranged on two sides of the plug-in shaft, and the second plunger spring is provided with two groups.
The construction method of the tunnel supporting system penetrating through the multilayer goaf comprises the following steps:
s1, fixing positioning screw steel and a positioning frame II on a tunnel rock wall, pouring and positioning by combining concrete, uniformly installing a tensioning steel rope in the positioning frame II, and connecting the tensioning steel rope with a square frame;
s2, connecting the square frame with an I-shaped frame provided with a plug-in shaft, installing a first sliding frame on the I-shaped frame, and installing a connecting frame between the connecting disc and the first sliding frame through a hinge bolt;
and S3, fixedly pouring and connecting the connection screw steel at the end part of the I-shaped frame with the concrete support beam in a combined mode, installing a plunger spring I in a combined mode, and tensioning and installing a plunger spring II between the sliding frame I and the square frame I.
Compared with the prior art, the invention has the beneficial effects that:
(1) When soil layers collapse between the concrete supporting beams, the concrete supporting beams are tensioned through the telescopic mechanism. When the concrete supporting beam falls down, the central tensioning mechanism is combined with the connecting frame, the first sliding frame, the connecting disc and the telescopic groove to realize deformation compensation, the first sliding frame moves along the upper side of the axial telescopic groove after being mutually close to the I-shaped frame, meanwhile, the first plunger spring is shortened to provide stability of the integral structure, and the central tensioning mechanism is extended to compensate deformation. The two ends of the connecting frame are respectively connected with the connecting disc and the first sliding frame in a rotating way, so that the I-shaped frame deformation quantity is provided, and meanwhile, the supporting rigidity of the connecting frame can be ensured.
(2) The second positioning frame is connected with the shape returning frame in an inserting mode through the inserting grooves, the second positioning frame is connected with the shape returning frame in a matching mode of the clamping bolts, and when the second positioning frame is separated from the shape returning frame under the acting force generated by the mining subsidence of the tunnel, the second plunger spring stretches to provide deformation compensation quantity.
(3) In order to ensure that deformation is reliably provided and stable connection between the two support beams is ensured, a tensioning steel rope is arranged between the two support beams, wherein the tensioning steel rope is uniformly distributed, when the two support beams are in a trend of mutual separation, the tensioning steel rope is tensioned, meanwhile, the second plunger spring drives the second sliding frame to move in the first adjusting groove, and the connecting steel rope is combined to limit the mutual separation between the second positioning frame and the second support beams, so that the adjacent concrete support beams and the fixed connection between the two support beams and the deep tunnel walls are ensured.
Drawings
Fig. 1 is a schematic view of the mounting structure of the present invention.
Fig. 2 is a schematic diagram of the overall structure of the present invention.
Fig. 3 is a schematic view of an installation structure of the connecting assembly and the telescopic mechanism in the present invention.
Fig. 4 is a schematic diagram of a split structure of a connection assembly and a telescopic mechanism in the present invention.
FIG. 5 is a schematic view of the installation structure of the center tension mechanism and the tension mechanism in the present invention.
Fig. 6 is a schematic structural view of the central tension mechanism in the present invention.
Fig. 7 is a schematic structural diagram of a second positioning frame in the present invention.
FIG. 8 is a schematic diagram of the connection structure of the tensioning mechanism and the loop frame in the present invention.
In the figure: 1. a concrete support beam; 2. a connection assembly; 20. the I-shaped frame; 200. a fixing plate; 21. connecting screw-thread steel; 22. a telescopic slot; 3. a telescoping mechanism; 30. a plug-in shaft; 31. a connecting disc; 310. an annular groove; 32. a connecting frame; 320. arc-shaped clamping blocks; 33. a first sliding frame; 34. a first positioning frame; 340. the clamping groove I; 341. a clamping groove II; 35. a plunger spring I; 36. a middle frame; 360. a splice groove; 361. a locking bolt; 37. a hinge bolt; 4. a central tensioning mechanism; 40. a shape-returning frame; 41. splicing blocks; 42. a plunger spring II; 43. a connecting rod; 44. an adjusting groove I; 45. an adjusting groove II; 5. a positioning frame II; 51. a plug-in groove; 52. a tensioning frame; 53. a connecting flange; 54. a clamping flange; 55. clamping a bolt; 6. a tensioning mechanism; 60. a second sliding frame; 61. connecting a steel cable; 62. tensioning the steel rope; 63. positioning deformed steel bars; 64. and (5) positioning the plate.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the specific embodiments.
As shown in fig. 1 and 2, the tunnel supporting system penetrating through the multilayer goaf comprises a concrete supporting beam 1 and a connecting component 2 connected with the concrete supporting beam 1, wherein the connecting component 2 is uniformly arranged along the end part of the concrete supporting beam 1, the connecting component 2 comprises an I-shaped frame 20, two ends of the I-shaped frame 20 are provided with connecting threaded steels 21, the connecting threaded steels 21 are connected with the end part of the concrete supporting beam 1, a telescopic mechanism 3 is arranged on the connecting component 2, the telescopic mechanism 3 is connected with a positioning frame two 5, a tensioning mechanism 6 is arranged between the telescopic mechanism 3 and the positioning frame two 5, the positioning frame two 5 and the tensioning mechanism 6 are connected with a tunnel rock wall through concrete pouring, and a central tensioning mechanism 4 is arranged between the telescopic mechanism 3 and the I-shaped frame 20.
Specifically, in order to ensure the reliability in the tunneling process of the tunnel, collapse is avoided, when the multilayer goaf is penetrated, the concrete support beams 1 distributed in the tunnel are combined with the connecting assembly 2 and the locating frame II 5 to be fixedly connected with the deep rock wall of the tunnel, so that the fixed connection between the concrete support beams 1 and the reliable and stable connection between the concrete support beams 1 and the inner wall of the tunnel are realized, and when the goaf collapses or sinks, the adjacent concrete support beams 1 can ensure stable connection and avoid direct collapse or collapse.
As shown in fig. 3 and 4, the telescopic mechanism 3 includes a telescopic slot 22 disposed at a central portion of the i-frame 20, a plugging shaft 30 is mounted in the telescopic slot 22, connecting discs 31 are disposed at two ends of the plugging shaft 30, annular grooves 310 are disposed at sides of the connecting discs 31, a connecting frame 32 is mounted in the annular grooves 310 in an matched manner, a first sliding frame 33 is rotatably connected to an end portion of the connecting frame 32, an arc clamping block 320 is disposed on the connecting frame 32, an arc radius of the arc clamping block 320 is equal to a circular radius of the annular groove 310, the connecting frame 32 is mounted in a sliding fit manner with the annular groove 310 through the arc clamping block 320, the first sliding frame 33 is in sliding clamping connection with an edge of the i-frame 20, fixing plates 200 are symmetrically disposed at two ends of the telescopic slot 22, a first positioning frame 34 is mounted on the fixing plates 34 in a matched manner, a first clamping groove 340 and a second clamping groove 341 are mounted in a matched manner with the fixing plates 200, and a first sliding frame 35 is mounted between the edge of the second clamping block 320 and the first sliding frame 33.
Specifically, when soil layer collapse occurs between the concrete support beams 1, tension is achieved between the concrete support beams 1 through the telescopic mechanism 3. When the concrete supporting beam 1 falls down, the central tension mechanism 4 combines the connecting frame 32, the first sliding frame 33, the connecting disc and the telescopic groove 22 to realize deformation compensation, the first sliding frame 33 moves to the upper side of the telescopic groove 22 along the I-shaped frame 20 after being mutually close, meanwhile, the first plunger spring 35 shortens to provide stability of the integral structure, and the central tension mechanism 4 stretches to compensate deformation amount.
More specifically, both ends of the link frame 32 are rotatably connected to the connection plate 31 and the first carriage 33, respectively, and the support rigidity of the link frame 32 can be ensured while providing the deformation amount of the spool frame 20.
Further, as shown in fig. 5, 6 and 7, the central tensioning mechanism 4 includes a middle frame 36, one end of the middle frame 36 is fixedly connected with the inserting shaft 30, the other end of the middle frame 36 is connected with the returning frame 40, the central tensioning mechanism 4 further includes a first adjusting groove 44 disposed on the returning frame 40, a second adjusting groove 45 is disposed on the inner side of the returning frame 40, an inserting groove 51 is disposed on the second positioning frame 5, the second positioning frame 5 is matched with the second adjusting groove 45 of the returning frame 40 through the inserting groove 51, a clamping flange 54 is disposed at an end of the inserting groove 51, the clamping flange 54 is connected with the second adjusting groove 45 through a clamping bolt 55, a second sliding frame 60 is slidably mounted on the first adjusting groove 44, a connecting rod 43 is rotatably disposed at one end of the second sliding frame 60, a second plunger spring 42 is rotatably connected between the connecting rod 43 and the rotating connecting part, a second tensioning mechanism 5 is disposed between the other end of the second sliding frame 60 and the second positioning frame 5, and the second tensioning mechanism 6 is connected with the second positioning frame 5 through the second tensioning mechanism 6.
Specifically, the second positioning frame 5 is inserted into the return frame 40 through the insertion groove 51, and is connected with the return frame 40 under the cooperation of the clamping bolt 55, and when the second positioning frame 5 is separated from the return frame 40 under the action force generated by the mining subsidence of the tunnel, the second plunger spring 42 stretches to provide the deformation compensation amount.
Further, as shown in fig. 7 and 8, the tensioning mechanism 6 includes a tensioning frame 52 disposed at an end of the plugging slot 51, the tensioning frame 52 is disposed at an inner side of the clip frame 40, a connection flange 53 is disposed on the tensioning frame 52, a connection steel cable 61 is disposed between the connection flange 53 and the second carriage 60, a positioning plate 64 is disposed in the clip frame 40, a tensioning steel cable 62 is uniformly disposed on the positioning plate 64, the other end of the tensioning steel cable 62 penetrates out of an end of the second positioning frame 5, the tensioning steel cable 62 penetrates through the second positioning frame 5 and is connected with a positioning screw steel 63, and the positioning screw steel 63 is inserted and fixed in a tunnel rock wall.
Specifically, in order to ensure stable connection with the tunnel rock wall and the concrete support beam 1 while reliably providing deformation, tension cables 62 are arranged between the loop-shaped frame 40 and the positioning frame two 5, wherein the tension cables 62 are uniformly distributed, when the loop-shaped frame 40 and the positioning frame two 5 have a tendency of being separated from each other, the tension cables 62 are tensioned, meanwhile, the plunger spring two 42 drives the sliding frame two 60 to move in the adjusting groove one 44, and the connection cables 61 limit the mutual separation between the positioning frame two 5 and the loop-shaped frame 40, so that the fixed connection between the adjacent concrete support beam 1 and the deep tunnel rock wall is ensured.
Further, as shown in fig. 3, 4, 5 and 6, the end of the intermediate frame 36 is provided with a splicing groove 360, one end of the splicing groove 360 is opened, the other end of the splicing groove is closed, the edge of the clip frame 40 is provided with a splicing block 41, the clip frame 40 is mounted in cooperation with the splicing groove 360 through the splicing block 41, and the open end of the splicing groove 360 is rotatably mounted with a locking bolt 361.
Further, as shown in fig. 3, a hinge bolt 37 is disposed between the connecting frame 32 and the first sliding frame 33, a connecting thread is disposed at an end of the hinge bolt 37, a middle portion of the hinge bolt 37 is smoothly disposed, the connecting frame 32 is cooperatively connected with the smooth section, and the connecting thread is in threaded connection with the first sliding frame 33.
Further, the tightening steel ropes 62 are symmetrically arranged at two sides of the second positioning frame 5, and the tightening steel ropes 62, the positioning threaded steel 63 and the second positioning frame 5 are in tightening connection through nuts.
Further, the first sliding frame 33 is symmetrically arranged at two sides of the plugging shaft 30, and the second plunger spring 42 is provided with two groups.
The construction method of the tunnel supporting system penetrating through the multilayer goaf comprises the following steps:
s1, fixing a positioning screw steel 63 and a positioning frame II 5 on a tunnel rock wall, pouring and positioning by combining concrete, uniformly installing a tensioning steel cable 62 in the positioning frame II 5, and connecting the tensioning steel cable 62 with the square frame 40;
s2, connecting the rectangular frame 40 with the I-shaped frame 20 provided with the plug-in shaft 30, mounting a first sliding frame 33 on the I-shaped frame 20, and mounting a connecting frame 32 between the connecting disc 31 and the first sliding frame 33 through a hinge bolt 37;
s3, fixedly pouring and connecting the connecting screw steel 21 at the end part of the I-shaped frame 20 with the concrete supporting beam 1 by combining concrete, installing the plunger spring I35 by combining the positioning frame I34, and tensioning and installing the plunger spring II 42 between the sliding frame I33 and the rectangular frame 40.
The working principle of the embodiment of the invention is as follows:
as shown in fig. 1-8, in order to ensure reliability in the tunneling process of the tunnel, collapse is avoided, when a multilayer goaf is traversed, the concrete support beams 1 distributed in the tunnel are combined with the connecting assembly 2 and the positioning frame two 5 to be fixedly connected with the deep rock wall of the tunnel, so that the fixed connection between the concrete support beams 1 and the reliable stable connection between the concrete support beams 1 and the inner wall of the tunnel are realized, and when the goaf collapses or sinks, the adjacent concrete support beams 1 can ensure stable connection and avoid direct collapse or collapse. When soil layers collapse between the concrete supporting beams 1, the concrete supporting beams 1 are tensioned through the telescopic mechanism 3. When the concrete supporting beam 1 falls down, the central tension mechanism 4 combines the connecting frame 32, the first sliding frame 33, the connecting disc and the telescopic groove 22 to realize deformation compensation, the first sliding frame 33 moves to the upper side of the telescopic groove 22 along the I-shaped frame 20 after being mutually close, meanwhile, the first plunger spring 35 shortens to provide stability of the integral structure, and the central tension mechanism 4 stretches to compensate deformation amount. Both ends of the link frame 32 are rotatably connected to the connection plate 31 and the first carriage 33, respectively, and the support rigidity of the link frame 32 can be ensured while providing the deformation amount of the spool frame 20. The second positioning frame 5 is inserted into the rectangular frame 40 through the insertion groove 51 and is connected with the rectangular frame 40 under the cooperation of the clamping bolts 55, and when the second positioning frame 5 is separated from the rectangular frame 40 under the action force generated by the mining subsidence of the tunnel, the second plunger spring 42 stretches to provide deformation compensation quantity. In order to ensure that the deformation amount is reliably provided and the stable connection between the two support beams 1 and the tunnel rock wall is ensured, tensioning steel ropes 62 are arranged between the two support beams 40 and the two positioning frames 5, wherein the tensioning steel ropes 62 are uniformly distributed, when the two support beams 40 and the two positioning frames 5 have the tendency of mutual separation, the tensioning steel ropes 62 are tensioned, meanwhile, the two plunger springs 42 drive the two sliding frames 60 to move in the first adjusting grooves 44, the mutual separation between the two positioning frames 5 and the two support beams 40 is limited by combining the connecting steel ropes 61, and the fixed connection between the adjacent two support beams 1 and the rock wall of the deep tunnel is further ensured.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The tunnel supporting system penetrating through the multilayer goaf comprises a concrete supporting beam (1) and a connecting component (2) connected with the concrete supporting beam (1), wherein the connecting component (2) is uniformly arranged along the end part of the concrete supporting beam (1), the tunnel supporting system is characterized in that the connecting component (2) comprises an I-shaped frame (20), two ends of the I-shaped frame (20) are provided with connecting screw steels (21), the connecting screw steels (21) are connected with the end part of the concrete supporting beam (1), a telescopic mechanism (3) is arranged on the connecting component (2), the telescopic mechanism (3) is connected with a locating frame II (5), a tensioning mechanism (6) is arranged between the telescopic mechanism (3) and the locating frame II (5), the locating frame II (5) and a tunnel rock wall are connected through concrete pouring, and a central tensioning mechanism (4) is arranged between the telescopic mechanism (3) and the I-shaped frame (20);
the telescopic mechanism (3) comprises a telescopic groove (22) arranged at the central part of the I-shaped frame (20), a connecting disc (31) is arranged at the two ends of the connecting disc (30) in the telescopic groove (22), an annular groove (310) is arranged at the side edge of the connecting disc (31), a connecting frame (32) is arranged in the annular groove (310) in a matched mode, a first sliding frame (33) is rotatably connected with the end part of the connecting frame (32), an arc clamping block (320) is arranged on the connecting frame (32), the arc radius of the arc clamping block (320) is equal to the circular radius of the annular groove (310), the connecting frame (32) is arranged between the arc clamping block (320) and the annular groove (310) in a sliding mode, the first sliding frame (33) is connected with the edge of the I-shaped frame (20) in a sliding mode, a fixing plate (200) is symmetrically arranged at the two ends of the telescopic groove (22), a first positioning frame (34) is clamped on the fixing plate (200), a second positioning frame (34) is clamped with the first positioning frame (340) in a matched mode, and the second positioning frame (340) is matched with the second positioning frame (341) in a matched mode, a plunger spring I (35) is arranged between the positioning frame I (34) and the sliding frame I (33);
the center tensioning mechanism (4) comprises a middle frame (36), one end of the middle frame (36) is fixedly connected with the plug-in shaft (30), the other end of the middle frame (36) is connected with the return frame (40), the center tensioning mechanism (4) further comprises a first adjusting groove (44) arranged on the return frame (40), a second adjusting groove (45) is arranged on the inner side of the return frame (40), a plug-in groove (51) is arranged on the second positioning frame (5), the second positioning frame (5) is matched with the second adjusting groove (45) of the return frame (40) through the plug-in groove (51), a clamping flange (54) is arranged at the end part of the plug-in groove (51), the clamping flange (54) is connected with the second adjusting groove (45) in a locking manner through a clamping bolt (55), a second sliding frame (60) is arranged on the first adjusting groove (44) in a sliding manner, a connecting rod (43) is rotatably arranged at one end of the second sliding frame (60), a connecting rod (33) is arranged on the first sliding frame, a connecting rod (6) is arranged between the second rotating frame (33) and the second rotating frame (6), the loop-shaped frame (40) is connected with the positioning frame II (5) through the tensioning mechanism (6).
2. Tunnel support system through multilayer goaf according to claim 1, characterized in that the tensioning mechanism (6) comprises a tensioning frame (52) arranged at the end of the inserting groove (51), the tensioning frame (52) is arranged at the inner side of the square frame (40), a connecting flange (53) is arranged on the tensioning frame (52), a connecting steel cable (61) is arranged between the connecting flange (53) and the second sliding frame (60), a positioning plate (64) is arranged in the square frame (40), tensioning steel cables (62) are uniformly arranged on the positioning plate (64), the other end of each tensioning steel cable (62) penetrates out of the end of the second positioning frame (5), each tensioning steel cable (62) penetrates through the second positioning frame (5) and is connected with a positioning threaded steel (63), and the positioning threaded steel (63) is fixed in a tunnel rock wall in an penetrating mode.
3. The tunnel supporting system crossing a multilayer goaf according to claim 2, wherein a splice groove (360) is formed in the end portion of the intermediate frame (36), one end of the splice groove (360) is opened, the other end of the splice groove is closed, a splice block (41) is arranged at the edge of the rectangular frame (40), the rectangular frame (40) is mounted in a matched manner between the splice block (41) and the splice groove (360), and a locking bolt (361) is mounted in a screwed manner at the open end of the splice groove (360).
4. A tunnel support system crossing a multilayer goaf according to claim 3, characterized in that a hinge bolt (37) is arranged between the connecting frame (32) and the first sliding frame (33), the end part of the hinge bolt (37) is provided with a connecting thread, the middle part of the hinge bolt (37) is smooth, the connecting frame (32) is connected with the smooth section in a matched manner, and the connecting thread is connected with the first sliding frame (33) in a threaded manner.
5. The tunnel supporting system penetrating through the multilayer goaf according to claim 4, wherein the tightening steel ropes (62) are symmetrically arranged on two sides of the second locating frame (5), and the tightening steel ropes (62) and the locating screw steels (63) are in tightening connection with the second locating frame (5) through nuts.
6. The tunnel supporting system through the multilayer goaf according to claim 5, wherein the first sliding frame (33) is symmetrically arranged at two sides of the inserting shaft (30), and the second plunger spring (42) is provided with two groups.
7. The method of constructing a tunnel support system through a multi-layered goaf of claim 6, comprising the steps of:
s1, fixing a positioning screw steel (63) and a positioning frame II (5) on a tunnel rock wall, pouring and positioning by combining concrete, uniformly installing a tensioning steel cable (62) in the positioning frame II (5), and connecting the tensioning steel cable (62) with a return frame (40);
s2, connecting the square frame (40) with the I-shaped frame (20) provided with the plug-in shaft (30), installing a first sliding frame (33) on the I-shaped frame (20), and installing a connecting frame (32) between the connecting disc (31) and the first sliding frame (33) through a hinge bolt (37);
s3, fixedly pouring and connecting the connection screw steel (21) at the end part of the I-shaped frame (20) and the concrete support beam (1) by combining concrete, installing the plunger spring I (35) by combining the positioning frame I (34), and tensioning and installing the plunger spring II (42) between the sliding frame I (33) and the square frame (40).
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| CN117948163B (en) * | 2024-03-26 | 2024-06-11 | 洛阳展尚建筑工程有限公司 | Supporting frame for preventing tunnel from collapsing |
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