阅读说明：本技术 隧道装配式内撑环拱衬砌加固结构及其拼装方法 (Tunnel assembly type inner supporting ring arch lining reinforcing structure and assembling method thereof ) 是由 赵立财 于 2021-07-04 设计创作，主要内容包括：本发明公开了隧道装配式内撑环拱衬砌加固结构及其拼装方法,涉及隧道施工技术领域,包括软岩层,所述软岩层的内侧壁安装有型钢拱架,且型钢拱架的内侧焊接有钢筋网,所述钢筋网的内侧连接有内撑环拱,且内撑环拱包括有环拱单元预制件,所述环拱单元预制件的一侧开设有第一凹槽,所述环拱单元预制件的另一侧内部开设有滑行槽。本发明的有益效果是：通过在软岩地区开挖的隧道内架设定型化内撑环拱,环拱单元预制件的两端分别为第一混凝土喷射层与第一凹槽,将环拱单元预制件的凸起插入到相邻环拱单元预制件的第一凹槽当中,最终形成内撑环拱,与传统的施工方法相比,本技术的内撑环拱拼接速度快,对工人的施工技术要求较低,具有高效性。(The invention discloses a tunnel assembly type inner supporting ring arch lining reinforcing structure and an assembling method thereof, and relates to the technical field of tunnel construction. The invention has the beneficial effects that: the shaped inner supporting ring arch is erected in the tunnel excavated in the soft rock area, the two ends of the ring arch unit prefabricated member are respectively provided with the first concrete spraying layer and the first groove, the bulge of the ring arch unit prefabricated member is inserted into the first grooves of the adjacent ring arch unit prefabricated members, and finally the inner supporting ring arch is formed.)

1. Tunnel assembled inner support ring encircles lining cutting reinforced structure, including soft rock stratum (1), its characterized in that: the steel arch centering (2) is installed on the inner side wall of the soft rock stratum (1), a steel mesh (3) is welded on the inner side of the steel arch centering (2), an inner supporting ring arch (4) is connected to the inner side of the steel mesh (3), the inner supporting ring arch (4) comprises a ring arch unit prefabricated member (34), a first groove (5) is formed in one side of the ring arch unit prefabricated member (34), a sliding groove (6) is formed in the other side of the ring arch unit prefabricated member (34), locking pin holes (7) are formed in the bottom end of the sliding groove (6), a sliding plate (35) is placed on the inner side of the sliding groove (6), a plurality of groups of bulges (8) are fixedly connected to one side of the sliding plate (35), a first concrete injection layer (9) is poured between the steel mesh (3) and the steel arch centering (2), a reserved groove (10) is formed in the middle of the bottom end of the ring arch unit prefabricated member (34), a hemispherical conical head (11) is placed on the inner side of the reserved groove (10), a telescopic pipe (12) is welded at the bottom of the hemispherical conical head (11), a rotary handle (13) is fixedly connected to the upper portion of the outer side of the telescopic pipe (12), a bottom round pipe (14) is in threaded connection with the lower portion of the outer side of the telescopic pipe (12), a first support frame (16) is installed at the bottom end of the bottom round pipe (14), the side surface of the first support frame (16) is connected with the bottom round pipe (14) through a rotatable support seat (15), a first support wheel (17) is installed at the bottom end of the first support frame (16), a first prefabricated bottom plate (18) is connected to one side of the lower portion inside the soft rock stratum (1) in a pouring mode, a second prefabricated bottom plate (36) is spliced to the other side of the first prefabricated bottom plate (18), and a tunnel bottom soft rock (39) is arranged at the bottom of the soft rock stratum (1), and the soft rock (39) at the bottom of the tunnel is connected with the first prefabricated bottom plate (18) and the second prefabricated bottom plate (36) through a plurality of groups of anti-skid nails (19), and a second concrete spraying layer (38) is poured between the reinforcing mesh (3) and the inner supporting ring arch (4).

2. The tunnel-fabricated inner bracing ring arch lining reinforcing structure of claim 1, wherein: the preformed groove (10) and the ring arch unit prefabricated part (34) are of an integrated structure through the grooving, and the inner side of the preformed groove (10) and the outer side of the hemispherical conical head (11) are distributed in a tightly attached state.

3. The tunnel-fabricated inner bracing ring arch lining reinforcing structure of claim 1, wherein: the central axis of the telescopic pipe (12) coincides with the central axis of the bottom round pipe (14), and the telescopic pipe (12) forms a telescopic structure with the first support frame (16) through the bottom round pipe (14).

4. The tunnel-fabricated inner bracing ring arch lining reinforcing structure of claim 1, wherein: the sliding groove (6) and the ring arch unit prefabricated member (34) form an integrated structure through the open groove, and the inner side of the sliding groove (6) is in interference connection with the outer side of the sliding plate (35).

5. The tunnel-fabricated inner bracing ring arch lining reinforcing structure of claim 1, wherein: the bulges (8) and the sliding plates (35) are distributed in a vertical state, and the sliding plates (35) and the ring arch unit prefabricated members (34) form a locking structure through the locking pin holes (7), the sliding grooves (6).

6. The tunnel-fabricated inner bracing ring arch lining reinforcing structure of claim 1, wherein: the ring arch unit prefabricated members (34) are of arc-shaped structures, and a splicing structure is formed between the two groups of ring arch unit prefabricated members (34) through the protrusions (8) and the first grooves (5).

7. Tunnel assembled inner support ring encircles lining cutting reinforced structure's device of assembling, including steelframe (20), its characterized in that: the steel frame is characterized in that a movable groove (21) is formed in the inner side of the steel frame (20), T-shaped rods (22) are placed on the inner side of the movable groove (21), two fixing rings (23) are welded at the top end of the steel frame (20), nuts (25) are connected to two sides of the fixing rings (23) in an abutting mode, threaded rods (24) are connected to the middle of the inner side of the fixing rings (23) in a threaded mode, a bottom plate (26) is connected to the bottom end of the T-shaped rods (22), two second grooves (27) are formed in the top end of the bottom plate (26), barb panels (28) are placed on the inner sides of the second grooves (27), the barb panels (28) are connected with the bottom plate (26) through connecting shafts (37), supporting rods (29) are connected to one side of the barb panels (28) in a hooking mode, rotating rings (30) are movably connected to the tail ends of the supporting rods (29), and the rotating rings (30) are fixedly connected with the bottom plate (26), the bottom welding of bottom plate (26) has second support frame (31), and second supporting wheel (32) are installed to the bottom of second support frame (31), rope ladder (33) are installed to bottom one side of bottom plate (26).

8. The assembling method of the tunnel assembly type inner supporting ring arch lining reinforcing structure comprises the steps of steel bar mesh (3) building, second concrete spraying layer (38) spraying, inner supporting ring arch (4) installing and inner supporting ring arch (4) lining reinforcing, and is characterized in that: the construction of the reinforcing mesh (3) and the spraying of the second concrete spraying layer (38) comprise the following steps:

step one, manually rotating the threaded rod (24) to enable the moving directions of the threaded rod (24) to be different, driving the barb panel (28) connected by the steel frame (20) to slide along the second groove (27) on the inner side of the top end of the bottom plate (26) and rotate around the connecting shaft (37), and enabling the tail end of the barb panel (28) to abut against the inner wall of the steel mesh reinforcement (3) with the pre-installed arch structure;

step two, the support rod (29) is hooked at the barb panel (28), so that the barb panel (28), the support rod (29) and the bottom plate (26) form a triangular structure, and the support force to the reinforcing mesh (3) is enhanced;

and thirdly, manually spraying a second concrete spraying layer (38) on the inner wall of the reinforcing mesh (3).

9. The tunnel assembly type inner supporting ring arch lining reinforcing structure and the assembling method thereof according to claims 1 to 8, wherein: the installation steps of the inner supporting ring arch (4) are as follows:

firstly, two adjacent ring arch unit prefabricated members (34) can be spliced by respectively arranging a first groove (5) and a protrusion (8) at two ends of the ring arch unit prefabricated members (34);

step two, because the inside one side of ring unit prefab (34) has seted up sliding groove (6), be convenient for the manual work promote that slide plate (35) slide along sliding groove (6) to drive arch (8) rather than being connected and carry out concertina movement, and insert in first recess (5) of next ring unit prefab (34), simultaneously, slide plate (35) push to lockpin hole (7), and then conveniently carry out quick installation and demolish work to ring unit prefab (34).

10. The tunnel assembly type inner supporting ring arch lining reinforcing structure and the assembling method thereof according to claims 1 to 8, wherein: the lining reinforcing step of the inner supporting ring arch (4) is as follows:

step one, a preformed groove (10) is formed in the middle of the bottom end of a prefabricated part (34) of an annular arch unit, a hemispherical conical head (11) at the top end of a first support frame (16) can be stably inserted into the preformed groove (10) in an inner supporting annular arch (4), so that the first support frame (16) can stably provide supporting acting force for the inner supporting annular arch (4), a rotating handle (13) is held by a hand manually, a telescopic pipe (12) is rotated, telescopic operation is performed between the telescopic pipe and a bottom circular pipe (14), and the hemispherical conical head (11) is conveniently and rapidly abutted against the inner side of the preformed groove (10) to be fixed;

and step two, the extension tubes (12) on two sides of the outer wall of the first support frame (16) are rotated simultaneously, so that the extension tubes and the bottom circular tube (14) are rotated in a threaded manner, the hemispherical conical heads (11) on the extension tubes are extended into the reserved grooves (10) in the ring arch unit prefabricated members (34), supporting operation of the ring arch unit prefabricated members (34) on two sides is completed, and the direction of the extension tubes (12) is adjusted under the rotating action of the rotatable support base (15), so that the supporting work of the ring arch unit prefabricated members (34) is conveniently and rapidly completed.

Technical Field

The invention relates to the technical field of tunnel construction, in particular to a tunnel assembly type inner supporting ring arch lining reinforcing structure and an assembling method thereof.

Background

In order to control the stress of surrounding rocks to be released and deformed properly, increase the structural safety and facilitate construction, primary supports need to be arranged after tunnels are excavated, and in soft rock areas with poor geology, the common primary supports cannot meet the support requirements, so that the phenomena of large deformation of the primary supports, local collapse of the tunnels due to insufficient support force and the like can occur, and how to solve the problem becomes a great difficulty in engineering.

The method is characterized in that a long anchor rod is often used, the reserved deformation is increased, double-layer primary support and a prestressed anchor cable are often used, a surrounding rock expanding excavation and prestressed anchor cable support control technology is also proposed, a telescopic steel frame control method is also used abroad, the methods are mainly based on the angle of reinforcing surrounding rocks, a telescopic steel frame and a 9-13 m long anchor rod are used for controlling primary support deformation, the method is complex and high in cost in construction, the deformation needs to be accurately predicted when the reserved deformation is increased, and the method is difficult to achieve in actual construction. The improvement of the hole shape, the leaving of longitudinal seams on the injection layer or the multiple support are all measures for treating the large deformation of the initial support of the tunnel, but the application is not strong and has certain blindness. The control of the large deformation of the primary support is started from multiple directions of geology, design, monitoring and construction.

Disclosure of Invention

The invention aims to provide a tunnel assembly type inner supporting ring arch lining reinforcing structure and an assembling method thereof, and solves the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the tunnel assembly type inner supporting ring arch lining reinforcing structure comprises a soft rock stratum, wherein a section steel arch frame is installed on the inner side wall of the soft rock stratum, a steel bar mesh is welded on the inner side of the section steel arch frame, an inner supporting ring arch is connected on the inner side of the steel bar mesh and comprises a ring arch unit prefabricated member, a first groove is formed in one side of the ring arch unit prefabricated member, a sliding groove is formed in the other side of the ring arch unit prefabricated member, a locking pin hole is formed in the bottom end of the sliding groove, a sliding plate is placed on the inner side of the sliding groove, a plurality of groups of bulges are fixedly connected on one side of the sliding plate, a first concrete spraying layer is poured between the steel bar mesh and the section steel arch frame, a reserved groove is formed in the middle of the bottom end of the ring arch unit prefabricated member, a hemispherical conical head is placed on the inner side of the reserved groove, and a telescopic pipe is welded at the bottom of the hemispherical conical head, and the outside top fixedly connected with of flexible pipe is rotatory handle, the outside below threaded connection of flexible pipe has the bottom pipe, and the bottom of bottom pipe installs first support frame, the side of first support frame is connected with the bottom pipe through rotatable supporting seat, and the bottom of first support frame installs first supporting wheel, pour and be connected with first prefabricated bottom plate on one side of the inside below of soft stratum, and the opposite side concatenation of first prefabricated bottom plate has the prefabricated bottom plate of second, settle the bottom of soft stratum has tunnel bottom soft rock, and all be connected through the multiunit antiskid ribbed tile between tunnel bottom soft rock and first prefabricated bottom plate, the second prefabricated bottom plate, pour the second concrete spray layer between reinforcing bar net and the inner support ring arch.

Optionally, the preformed groove and the ring arch unit prefabricated member form an integrated structure through the open groove, and the inner side of the preformed groove and the outer side of the hemispherical conical head are distributed in a tightly attached state.

Optionally, the central axis of the telescopic pipe coincides with the central axis of the bottom circular pipe, and the telescopic pipe forms a telescopic structure with the first support frame through the bottom circular pipe.

Optionally, the sliding groove and the ring arch unit prefabricated member form an integrated structure through the open groove, and the inner side of the sliding groove is in abutting connection with the outer side of the sliding plate.

Optionally, the protrusions and the sliding plates are distributed in a vertical state, and the sliding plates and the ring arch unit prefabricated member form a locking structure through locking pin holes, sliding grooves and the ring arch unit prefabricated member.

Optionally, the ring arch unit prefabricated members are of arc-shaped structures, and a splicing structure is formed between the two groups of ring arch unit prefabricated members through the protrusions and the first grooves.

The assembling device of the tunnel assembly type inner supporting ring arch lining reinforcing structure comprises a steel frame, the inner side of the steel frame is provided with a movable groove, and the inner side of the movable groove is provided with a T-shaped rod, the top end of the steel frame is welded with two groups of fixing rings, the two sides of the fixing rings are connected with nuts in a butting way, the middle part of the inner side of the fixing ring is in threaded connection with a threaded rod, the bottom end of the T-shaped rod is connected with a bottom plate, two groups of second grooves are arranged at the top end of the bottom plate, barb panels are arranged on the inner sides of the second grooves, the barb panel is connected with the bottom plate through a connecting shaft, one side of the barb panel is hooked and connected with a supporting rod, the tail end of the supporting rod is movably connected with a rotating ring, the rotating ring is fixedly connected with the bottom plate, the bottom end of the bottom plate is welded with a second supporting frame, and the bottom of the second support frame is provided with a second support wheel, and one side of the bottom plate is provided with a rope ladder.

The assembling method of the assembled inner supporting ring arch lining reinforcing structure of the tunnel comprises the steps of steel bar mesh building, second concrete spraying layer spraying, inner supporting ring arch installation and inner supporting ring arch lining reinforcing, wherein the steps of steel bar mesh building construction and second concrete spraying layer spraying are as follows:

step one, manually rotating a threaded rod to enable the threaded rod to move in different directions, driving a barb panel connected by a steel frame to slide along a second groove on the inner side of the top end of a bottom plate and rotate around a connecting shaft to enable the tail end of the barb panel to abut against the inner wall of a steel bar mesh with an arch structure which is additionally arranged in advance;

step two, the support rod is hooked at the barb panel, so that the barb panel, the support rod and the bottom plate form a triangular structure, and the support force of the reinforcing mesh is enhanced;

and thirdly, manually spraying the second concrete spraying layer on the inner wall of the reinforcing mesh.

Optionally, the installation steps of the inner supporting ring arch are as follows:

step one, two adjacent ring arch unit prefabricated parts can be spliced by respectively arranging a first groove and a bulge at two ends of the ring arch unit prefabricated part;

and step two, because the sliding groove is formed in one side of the inner part of the ring arch unit prefabricated member, the sliding plate can be conveniently pushed to slide along the sliding groove manually, the protrusion connected with the sliding plate is driven to perform telescopic motion, the sliding plate is inserted into the first groove of the next ring arch unit prefabricated member, and meanwhile, the sliding plate is pushed into the lock pin hole, so that the ring arch unit prefabricated member can be conveniently and quickly installed and dismantled.

Optionally, the lining reinforcing step of the inner supporting ring arch is as follows:

step one, a preformed groove is formed in the middle of the bottom end of a prefabricated part of an annular arch unit, so that a hemispherical conical head at the top end of a first support frame can be stably inserted into the preformed groove in an inner supporting annular arch, the first support frame can stably provide supporting acting force for the inner supporting annular arch, and a handle is manually held by a hand to rotate a telescopic pipe, so that telescopic operation is performed between the handle and a bottom circular pipe, and the hemispherical conical head is conveniently and quickly abutted against the inner side of the preformed groove to be fixed;

and step two, the extension tubes on two sides of the outer wall of the first support frame are rotated simultaneously, so that the extension tubes and the bottom circular tube are rotated in a threaded manner, the hemispherical conical heads on the extension tubes extend into the preformed grooves in the ring arch unit prefabricated members, the supporting operation of the ring arch unit prefabricated members on two side surfaces is completed, and the direction of the extension tubes is adjusted under the rotating action of the rotatable support base, so that the supporting work of the ring arch unit prefabricated members is conveniently and quickly completed.

The invention provides a tunnel assembly type inner supporting ring arch lining reinforcing structure and an assembling method thereof, and the tunnel assembly type inner supporting ring arch lining reinforcing structure has the following beneficial effects:

1. according to the construction method, the shaped inner supporting ring arch is erected in the tunnel excavated in the soft rock area, the first concrete spraying layer and the first groove are respectively arranged at the two ends of the ring arch unit prefabricated member, the bulge of the ring arch unit prefabricated member is inserted into the first groove of the adjacent ring arch unit prefabricated member, and the inner supporting ring arch is finally formed.

2. According to the invention, through setting the reserved groove in the middle of the bottom end of the prefabricated part of the annular arch unit, a constructor can conveniently adjust the rotary handle to enable the telescopic pipe to extend upwards from the lower side of the inner side of the bottom circular pipe, and the hemispherical conical head can more stably extend into the reserved groove in the inner supporting annular arch, so that the telescopic pipe can be effectively prevented from deviating and falling off in the stress process, and the installation stability of the inner supporting annular arch can be effectively ensured.

3. According to the invention, through the setting that the threaded rod is in threaded connection with the middle part of the inner side of the fixing ring, a constructor can conveniently rotate the nut to enable the steel frame to synchronously move along with the threaded rod, so that the width of the steel frame can be enlarged or reduced, the constructor can conveniently complete construction of each part in a tunnel, and in addition, the constructor can conveniently adapt to construction work of tunnel mouths with different sizes by shortening the width of the steel frame.

4. According to the invention, the support rods on the bottom plate are adjusted, so that the support rods can be tightly attached to the barb panel under the action of the rotating ring to form a triangular structure, thereby effectively abutting against the upper reinforcing mesh, further providing a stable operating platform for constructors, and effectively ensuring the rapid tunnel construction operation.

5. According to the invention, through the arrangement of the sliding grooves in the ring arch unit prefabricated members, a constructor can conveniently promote the two adjacent ring arch unit prefabricated members to perform rapid splicing work in a sliding plate mode, so that the low working efficiency of tunnel construction caused by the slow splicing work efficiency of the inner supporting ring arch can be effectively avoided.

Drawings

FIG. 1 is a schematic structural diagram of a tunnel assembled inner supporting ring arch lining reinforcing structure and an assembling method thereof;

FIG. 2 is a schematic diagram of a primary supporting construction structure of a soft rock tunnel of the assembled inner supporting ring arch lining reinforcing structure of the tunnel and the assembling method thereof;

FIG. 3 is a schematic structural diagram of a prefabricated member of a ring arch unit of the assembled inner supporting ring arch lining reinforcing structure for a tunnel and the assembling method thereof;

FIG. 4 is a schematic view of an inner side structure of an end part of a prefabricated member of a ring arch unit of the assembled inner supporting ring arch lining reinforcing structure of the tunnel and the assembling method thereof;

FIG. 5 is a schematic structural view of the inner connection part of a steel frame and a T-shaped rod of the tunnel assembly type inner supporting ring arch lining reinforcing structure and the assembling method thereof;

fig. 6 is a schematic structural view of a joint of a barb panel and a support rod of the assembled inner support ring arch lining reinforcing structure for a tunnel and the assembling method thereof.

In the figure: 1. a soft rock formation; 2. a profile steel arch frame; 3. a reinforcing mesh; 4. an inner supporting ring arch; 5. a first groove; 6. a sliding groove; 7. a lock pin hole; 8. a protrusion; 9. a first concrete sprayed layer; 10. reserving a groove; 11. a hemispherical conical head; 12. a telescopic pipe; 13. rotating the grip; 14. a bottom circular tube; 15. the supporting seat can be rotated; 16. a first support frame; 17. a first support wheel; 18. a first prefabricated base plate; 19. anti-skid nails; 20. a steel frame; 21. a movable groove; 22. a T-shaped rod; 23. a fixing ring; 24. a threaded rod; 25. a nut; 26. a base plate; 27. a second groove; 28. a barbed panel; 29. a support bar; 30. a rotating ring; 31. a second support frame; 32. a second support wheel; 33. a rope ladder; 34. an annular arch unit prefabricated part; 35. a slide plate; 36. a second prefabricated base plate; 37. a connecting shaft; 38. a second concrete spray layer; 39. soft rock at the bottom of the tunnel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-6, the present invention provides a technical solution: a tunnel assembly type inner supporting ring arch lining reinforcing structure and an assembling method thereof comprise a soft rock stratum 1, a section steel arch frame 2 is installed on the inner side wall of the soft rock stratum 1, a reinforcing mesh 3 is welded on the inner side of the section steel arch frame 2, an inner supporting ring arch 4 is connected on the inner side of the reinforcing mesh 3, the inner supporting ring arch 4 comprises a ring arch unit prefabricated member 34, a first groove 5 is formed in one side of the ring arch unit prefabricated member 34, a sliding groove 6 is formed in the other side of the ring arch unit prefabricated member 34, a locking pin hole 7 is formed in the bottom end of the sliding groove 6, a sliding plate 35 is placed on the inner side of the sliding groove 6, a plurality of groups of bulges 8 are fixedly connected on one side of the sliding plate 35, a first concrete injection layer 9 is poured between the reinforcing mesh 3 and the section steel arch frame 2, a reserved groove 10 is formed in the middle of the bottom end of the ring arch unit prefabricated member 34, a hemispherical conical head 11 is placed on the inner side of the reserved groove 10, a telescopic pipe 12 is welded at the bottom of the hemispherical conical head 11, a rotary handle 13 is fixedly connected above the outer side of the extension tube 12, a bottom round tube 14 is in threaded connection with the lower part of the outer side of the extension tube 12, a first support frame 16 is installed at the bottom end of the bottom round tube 14, the side surface of the first support frame 16 is connected with the bottom round tube 14 through a rotatable support seat 15, a first support wheel 17 is installed at the bottom end of the first support frame 16, a first prefabricated bottom plate 18 is connected with one side of the lower part of the inner part of the soft rock layer 1 in a pouring mode, a second prefabricated bottom plate 36 is connected with the other side of the first prefabricated bottom plate 18 in a splicing mode, a tunnel bottom soft rock 39 is arranged at the bottom end of the soft rock layer 1, the tunnel bottom soft rock 39 is connected with the first prefabricated bottom plate 18 and the second prefabricated bottom plate 36 through a plurality of groups of anti-skid nails 19, meanwhile, a water stop belt can be arranged at the intersection between the first prefabricated bottom plate 18 and the second prefabricated bottom plate 36, so that the water seepage phenomenon at the prefabricated bottom plate in the tunnel is prevented, and a second concrete spraying layer 38 is poured between the reinforcing mesh 3 and the inner supporting ring arch 4.

Further, the preformed groove 10 is the integral structure through fluting and ring arch unit prefab 34, and the inboard of preformed groove 10 is closely laminating state distribution with the outside of hemisphere conical head 11, and through closely laminating distribution, the hemisphere conical head 11 of being convenient for can be more stable insert in the preformed groove 10 to can effectual improvement internal stay encircle 4's installation stability.

Further, the axis of the telescopic pipe 12 coincides with the axis of the bottom circular pipe 14, and the telescopic pipe 12 forms a telescopic structure with the first support frame 16 through the bottom circular pipe 14, so that the constructor can conveniently adjust the mode of rotating the grip 13 to enable the hemispherical conical head 11 to be stably inserted into the preformed groove 10 of the ring arch unit prefabricated part 34, thereby effectively avoiding the telescopic pipe 12 from deviating and falling off in the stress process.

Further, the sliding groove 6 and the ring arch unit prefabricated member 34 are of an integrated structure through the groove, the inner side of the sliding groove 6 is in contact connection with the outer side of the sliding plate 35, and the sliding plate 35 can move correspondingly in the sliding groove 6 conveniently through the contact connection.

Furthermore, the protrusions 8 and the sliding plates 35 are distributed in a vertical state, the sliding plates 35 form a locking structure with the ring arch unit prefabricated members 34 through the locking pin holes 7 and the sliding grooves 6, and through the locking structure, a constructor can conveniently arrange the sliding plates 35 in the locking pin holes 7 to complete rapid insertion work on the two adjacent ring arch unit prefabricated members 34.

Further, the unit prefab 34 is arc column structure is encircleed to the ring, and constitutes mosaic structure through arch 8, first recess 5 between two sets of ring unit prefabs 34, through mosaic structure, the constructor of being convenient for can be quick carry out concatenation work to the unit prefab 34 is encircleed to the ring under arch 8 and first recess 5's combination to can effectually practice thrift the not time wasted of concatenation work.

The assembling device of the tunnel assembly type inner supporting ring arch lining reinforcing structure comprises a steel frame 20, a movable groove 21 is formed in the inner side of the steel frame 20, T-shaped rods 22 are placed on the inner side of the movable groove 21, two fixing rings 23 are welded at the top end of the steel frame 20, nuts 25 are connected to two sides of the fixing rings 23 in a butting mode, threaded rods 24 are connected to the middle portions of the inner sides of the fixing rings 23 in a threaded mode, a bottom plate 26 is connected to the bottom end of each T-shaped rod 22, two second grooves 27 are formed in the top end of the bottom plate 26, barb panels 28 are placed on the inner sides of the second grooves 27 and connected with the bottom plate 26 through connecting shafts 37, supporting rods 29 are connected to one sides of the barb panels 28 in a hooking mode, a rotating ring 30 is movably connected to the tail ends of the supporting rods 29, the rotating ring 30 is fixedly connected with the bottom plate 26, second supporting frames 31 are welded at the bottom end of the bottom plate 26, and second supporting wheels 32 are installed at the bottom ends of the second supporting frames 31, a rope ladder 33 is installed at one side of the bottom plate 26.

The assembling method of the tunnel assembly type inner supporting ring arch lining reinforcing structure comprises the steps of building a steel bar mesh 3, spraying a second concrete spraying layer 38, installing an inner supporting ring arch 4 and reinforcing the inner supporting ring arch 4 in a lining mode, wherein the steps of building construction of the steel bar mesh 3 and spraying the second concrete spraying layer 38 are as follows:

step one, manually rotating the threaded rod 24 to enable the moving directions of the threaded rod 24 to be different, and driving the barbed panel 28 connected by the steel frame 20 to slide along the second groove 27 on the inner side of the top end of the bottom plate 26 and rotate around the connecting shaft 37, so that the tail end of the barbed panel 28 abuts against the inner wall of the steel mesh reinforcement 3 with the pre-installed arch structure;

step two, the support rod 29 is hooked at the barb panel 28, so that the barb panel 28, the support rod 29 and the bottom plate 26 form a triangular structure, and the support strength of the reinforcing mesh 3 is enhanced;

and step three, manually spraying the second concrete spraying layer 38 on the inner wall of the reinforcing mesh 3.

Further, the installation steps of the inner supporting ring arch 4 are as follows:

step one, two adjacent ring arch unit prefabricated members 34 can be spliced through the first groove 5 and the bulge 8 at the two ends of the ring arch unit prefabricated members 34 respectively;

step two, because the sliding groove 6 is formed in one side of the inside of the ring arch unit prefabricated member 34, the sliding plate 35 is conveniently pushed to slide along the sliding groove 6 manually, the protrusion 8 connected with the sliding plate is driven to perform telescopic motion, the sliding plate is inserted into the first groove 5 of the next ring arch unit prefabricated member 34, meanwhile, the sliding plate 35 is pushed into the lock pin hole 7, and then the ring arch unit prefabricated member 34 is conveniently and rapidly installed and dismantled.

Further, the lining reinforcing step of the inner supporting ring arch 4 is as follows:

step one, a preformed groove 10 is formed in the middle of the bottom end of a prefabricated part 34 of an annular arch unit, so that a hemispherical conical head 11 at the top end of a first support frame 16 can be stably inserted into the preformed groove 10 in an inner supporting annular arch 4, the first support frame 16 can stably provide supporting acting force for the inner supporting annular arch 4, a rotating handle 13 is held by a hand manually, a telescopic pipe 12 is rotated, telescopic operation is performed between the telescopic pipe 12 and a bottom circular pipe 14, and the hemispherical conical head 11 is conveniently and rapidly abutted against the inner side of the preformed groove 10 to be fixed;

and step two, simultaneously rotating the extension tubes 12 on two sides of the outer wall of the first support frame 16 to enable the extension tubes to rotate with the bottom round tube 14 in a threaded manner, further enabling the hemispherical conical heads 11 on the extension tubes to extend into the reserved grooves 10 in the ring arch unit prefabricated members 34 to complete supporting operation of the ring arch unit prefabricated members 34 on two side faces, and adjusting the directions of the extension tubes 12 under the rotating action of the rotatable support base 15 to facilitate fast completing supporting operation of the ring arch unit prefabricated members 34.

In conclusion, when the tunnel assembly type inner supporting ring arch lining reinforcing structure and the assembling method thereof are used, under the combination of the protrusion 8 and the first groove 5, a constructor can conveniently and rapidly splice the adjacent ring arch unit prefabricated members 34, so that the inner supporting ring arch 4 can reinforce the primary support, and the components required to be used for the primary support comprise the section steel arch 2 and the first concrete spraying layer 9, the inner wall of the soft rock tunnel is subjected to the primary support operation through the section steel arch 2 and the first concrete spraying layer 9, the reinforcing steel bar net 3 is attached to the first concrete spraying layer 9 through the building of the reinforcing steel bar net 3, the second concrete spraying layer 38 is manually sprayed and poured on the surface of the reinforcing steel bar net 3, and the screw rod 24 is connected to the middle part of the inner side of the fixing ring 23 in a threaded manner, so that the constructor can conveniently rotate the screw nut 25 to enable the steel frame 20 to move outwards along with the screw rod 24, thereby enabling the width of the steel frame 20 to be enlarged, so that the barbed panel 28 connected by the steel frame 20 slides along the second groove 27 on the inner side of the top end of the base plate 26, and it rotates around the connecting shaft 37, so that the tip of the barbed panel 28 abuts against the inner wall of the steel mesh 3 of the previously installed arch structure, and by hooking the support bar 29 to the barbed panel 28, the support bar 29 and the base plate 26 form a triangular structure, and the supporting force to the steel mesh 3 is enhanced, and then, the second support frame 31 is advanced forward by the rolling action of the second support wheel 32, and the first support frame 16 installed behind it is also advanced forward by the rolling action of the first support wheel 17 to the installation area of the steel mesh 3, and is rotated by the action of the screw thread connection of the telescopic tube 12 in the middle of the top end of the first support frame 16 and the bottom circular tube 14, so that the constructor can rotate the rotating grip 13, the hemispherical conical head 11 at the top of the extension tube 12 can be stably inserted into the preformed groove 10 in the ring arch unit prefabricated member 34, so that the limitation operation of the ring arch unit prefabricated member 34 at the top is realized, the first groove 5 and the protrusion 8 are respectively arranged at two ends of the ring arch unit prefabricated member 34, two adjacent ring arch unit prefabricated members 34 can be spliced, the sliding groove 6 is formed in one side of the inside of the ring arch unit prefabricated member 34, the sliding plate 35 is conveniently pushed to slide along the sliding groove 6 manually, the protrusion 8 connected with the sliding plate is driven to perform telescopic motion, the sliding plate is inserted into the first groove 5 of the next ring arch unit prefabricated member 34, and meanwhile, the sliding plate 35 is pushed into the locking pin hole 7, so that the ring arch unit prefabricated member 34 can be conveniently and rapidly installed and dismantled.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.