Permanent and temporary combined structure for reconstruction and extension of existing single-hole tunnel

Abstract

The embodiment of the invention provides a permanent and temporary combined structure for reconstruction and extension of a single-hole existing tunnel, and relates to the field of tunnel construction. The permanent and temporary combined structure for reconstruction and expansion of the existing single-hole tunnel comprises a fixing frame, an existing tunnel supporting frame is fixedly connected to one side of the fixing frame, and a newly-built tunnel supporting frame used in cooperation with the existing tunnel supporting frame is fixedly connected to the other side of the fixing frame; an inner cavity of the fixing frame is fixedly connected with a sealing frame, and an air supply assembly, a conveying assembly and a reinforcing assembly which are used in cooperation with the existing tunnel supporting frame and the newly-built tunnel supporting frame are arranged in the inner cavity of the fixing frame. The permanent and temporary combined structure for reconstruction and expansion of the single-hole existing tunnel has the advantages of being easy to operate and low in construction and disassembly difficulty, achieving the flexible permanent and temporary supporting conversion effect on the combined portal of the existing tunnel and the newly-built tunnel according to construction and traffic requirements, meanwhile meeting the traffic requirements of the existing tunnel or the newly-built tunnel, and preventing the traffic jam condition.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel construction, and more specifically, to a permanent and temporary combined structure for the reconstruction and expansion of an existing single-hole tunnel. Background Art

[0002] Existing roads often need to be rebuilt and expanded due to the increase in traffic volume or the occurrence of tunnel diseases. Existing tunnels are generally built a long time ago. Due to the limitations of the construction age, they have limitations in terms of the overall site selection principles, lining structure, construction technology, material durability, etc. At the same time, the geological conditions and topographic conditions of the tunnel site are constantly changing. Therefore, existing tunnels may have sections with diseases that cannot be completely cured or the cost of curing them is very high, such as large areas of surrounding rock at high positions of the tunnel entrance and deformation of the tunnel lining. In view of this situation, if all tunnels are completely abandoned and new tunnels are built, they may be affected by the objective conditions of the construction area and the site selection is limited. Abandoning tunnels that have not suffered from diseases or can be reinforced by engineering measures will also cause waste of the project and increase the difficulty and construction period of the construction. Therefore, some existing tunnels are used, and then expanded and rebuilt from existing tunnels, and sections with diseases that cannot be completely cured or the cost of curing them are abandoned. There are more and more engineering cases in which new tunnels are formed by renovation and expansion.

[0003] During the reconstruction and expansion of existing tunnels, there will be overlapping portal sections between the existing tunnel and the newly built tunnel. In order to ensure the construction safety of the combined portal sections of the existing tunnel and the newly built tunnel, conventional backfilling, arch protection, temporary I-beams, prestressed anchor rods and other measures are often used to support the area. The operation is complicated and the construction and disassembly are difficult. In addition, during the combined portal support of the existing tunnel and the newly built tunnel, it is impossible to effectively provide traffic guarantee for the existing tunnel, resulting in the closure of both the existing tunnel and the newly built tunnel, making the traffic more congested. Summary of the invention

[0004] This application aims to solve at least one of the technical problems in the prior art that conventional support measures are not only complicated to operate, difficult to construct and dismantle, but also cannot be used to flexibly convert the existing tunnel and the newly built tunnel into permanent and temporary support according to construction and traffic needs, and the existing tunnel and the newly built tunnel need to be closed, resulting in inaccessibility and traffic congestion. To this end, this application proposes a permanent and temporary combined structure for the expansion and reconstruction of a single-hole existing tunnel.

[0005] According to the embodiment of the present application, the permanent and temporary combined structure for the reconstruction and expansion of a single-hole existing tunnel includes: a fixed frame, one side of which is fixedly connected to an existing tunnel support frame, and the other side of which is fixedly connected to a newly built tunnel support frame used in conjunction with the existing tunnel support frame;

[0006] The inner cavity of the fixing frame is fixedly connected with a sealing frame, and the inner cavity of the fixing frame is respectively provided with an air supply component, a conveying component and a reinforcement component used in conjunction with an existing tunnel support frame and a newly built tunnel support frame;

[0007] An extension component and an indication component are respectively arranged on one side of the fixing frame away from the existing tunnel supporting frame and the newly-built tunnel supporting frame.

[0008] According to some embodiments of the present application, the air supply assembly includes a driving motor, which is fixed in the inner cavity of a fixed frame, the output shaft of the driving motor is fixedly connected to a driving gear and a driven gear is meshed on one side of the driving gear, the inner cavity of the driven gear is fixedly connected to a concave rod and a rotating sleeve is rotatably connected to the center of the concave rod, the surface wall of the rotating sleeve is fixedly connected to a connecting rod and a piston that slides with the sealing frame is hinged on the other side of the connecting rod.

[0009] According to some embodiments of the present application, the conveying assembly includes a first boosting pipe, two groups of the first boosting pipe are connected on the side of the sealing frame close to the piston, the other ends of the two groups of the first boosting pipes are connected with a three-way joint and both ends of the three-way joint are connected with an arc-shaped main pipe fixedly matched with the existing tunnel support frame and the newly built tunnel support frame, the inner ends of the two groups of the arc-shaped main pipes are connected with a straight branch pipe and the middle ends of the straight branch pipes are connected with an arc-shaped branch pipe.

[0010] According to some embodiments of the present application, the reinforcement component includes reserved holes, and the reserved holes are opened around the existing tunnel support frame and the newly built tunnel support frame. One end of the two groups of straight branch pipes and arc branch pipes are connected with a positioning cylinder and the inner wall of the positioning cylinder is slidably connected with a sliding seat, one side of the two groups of sliding seats is fixedly connected with an anchor rod used in conjunction with the reserved holes, one side of the two groups of sliding seats is fixedly connected with a pull rod and the other side of the pull rod is fixedly connected with a telescopic soft cover used in conjunction with the existing tunnel support frame and the newly built tunnel support frame.

[0011] According to some embodiments of the present application, the extension component includes a limit cylinder, which is embedded in a side of the fixed frame away from the existing tunnel support frame and the newly built tunnel support frame, the other side of the sealing frame close to the piston is connected to a second boosting pipe and the bottom end of the second boosting pipe is connected to an air storage tank, the outlet of the air storage tank is connected to an air outlet pipe and the other end of the air outlet pipe is connected to a telescopic bag that slides with the limit cylinder, and the inner cavity of the telescopic bag is fixedly connected to an elastic rope.

[0012] According to some embodiments of the present application, the indication assembly includes an elongated tube, which is embedded in the surroundings of the fixed frame near the limiting tube, the inner cavity of the elongated tube is slidably connected to a long rod, and the side of the elongated rod away from the fixed frame is fixedly connected to a warning frame fixedly matched with the telescopic bag, the upper and lower sides of the warning frame are provided with indication arrows and the inner cavity of the indication arrows is embedded with LED lamp beads, and both sides of the bottom of the warning frame are fixedly connected to movable wheels.

[0013] According to some embodiments of the present application, the outer surfaces of the two groups of anchor rods are sleeved with buffer springs used in conjunction with the sliding seat and the positioning cylinder.

[0014] According to some embodiments of the present application, the two groups of anchor rods and tension rods are distributed in a staggered state along the central axis of the existing tunnel support frame and the newly built tunnel support frame, respectively.

[0015] According to some embodiments of the present application, the outlet of the sealing frame is connected to a pressure relief pipe, and a pressure relief valve is provided at one end of the pressure relief pipe away from the sealing frame.

[0016] According to some embodiments of the present application, a positioning cone is fixedly connected to one side of the existing tunnel support frame and the newly-built tunnel support frame close to the reserved hole.

[0017] The beneficial effect of the present application is that when supporting the opening of the existing tunnel combined with the newly built tunnel, the driving motor of the air supply component first provides the driving source, and the driving gear and the driven gear drive the concave rod, the rotating sleeve, the connecting rod and the piston to perform reciprocating work and generate pressurized gas, which is then supplied to the two groups of positioning cylinders of the reinforcement component through the two groups of three-way joints, the arc main pipe, the straight branch pipe and the arc branch pipe in sequence by the two first pressurized gas pipes of the conveying component. Under the action of the high-pressure gas pressure, the two groups of sliding seats are forced to drive the two groups of anchor rods to pass through the reserved holes and reach the rock walls of the openings of the existing tunnel and the newly built tunnel. At the same time, the two groups of telescopic soft covers are pulled up by the two groups of pull rods to protect the opening area of ​​the existing tunnel combined with the newly built tunnel to prevent accidents caused by the falling of rocks, thereby improving the passing and construction safety of the opening of the existing tunnel combined with the newly built tunnel. The permanent and temporary combined structure, according to the characteristics of insufficient light in the tunnel, when warning passing pedestrians and vehicles, the second booster pipe of the extension component supplies the pressurized gas into the gas tank for temporary storage, and forces the telescopic bag in the limit cylinder to drive the elastic rope and the warning frame of the indicator component to extend forward to the predetermined position through the outlet pipe. Under the sliding support of the long cylinder and the long rod, and the movement of the two sets of moving wheels, after being in place, one set of indicator arrows and LED lamp beads on the warning frame flash, and point to the direction of the existing tunnel or the new tunnel accordingly, so that pedestrians and vehicles know the direction of travel to prevent obstruction of construction and accidents. It has the advantages of simple operation, low difficulty in construction and disassembly, and according to construction and traffic needs, it can realize the flexible permanent and temporary support conversion effect for the combined openings of the existing tunnel and the new tunnel, while meeting the traffic needs of the existing tunnel or the new tunnel to prevent traffic congestion.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to an embodiment of the present application;

[0021] Figure 2 It is a three-dimensional structural working state diagram of a permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to an embodiment of the present application;

[0022] Figure 3It is a partial cross-sectional view of the initial state of the three-dimensional structure of the permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to an embodiment of the present application;

[0023] Figure 4 It is a partial cross-sectional view of the three-dimensional structure working state of the permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to an embodiment of the present application;

[0024] Figure 5 It is a three-dimensional structural interior view of a permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to an embodiment of the present application;

[0025] Figure 6 It is a front view of the structure of the air supply assembly, the conveying assembly and the reinforcement assembly according to an embodiment of the present application;

[0026] Figure 7 is a partial front cross-sectional view of the conveying assembly and the reinforcement assembly structure according to an embodiment of the present application;

[0027] Figure 8 It is a front view of the extension component and the indication component structure according to an embodiment of the present application;

[0028] Fig. 9 is a partial cross-sectional view of a telescopic bag structure according to an embodiment of the present application;

[0029] Fig.10 is a side view of the rotating assembly structure according to an embodiment of the present application;

[0030] Fig.11 is a partial front cross-sectional view of the air guide assembly structure according to an embodiment of the present application;

[0031] Fig.12 It is a front view of the fixing frame structure according to an embodiment of the present application.

[0032] Icons: 1. Fixed frame; 2. Existing tunnel support frame; 3. New tunnel support frame; 4. Sealing frame; 5. Air supply assembly; 51. Driving motor; 52. Driving gear; 53. Driven gear; 54. Concave rod; 55. Rotating sleeve; 56. Connecting rod; 57. Piston; 6. Conveying assembly; 61. First booster pipe; 62. Three-way joint; 63. Arc main pipe; 64. Straight branch pipe; 65. Arc branch pipe; 7. Reinforcement assembly; 71. Reserved hole; 72. Positioning cylinder; 73. Sliding seat; 74. Anchor rod; 75. Pull rod; 76. Telescopic soft cover; 8. Extension assembly; 81. Limit cylinder; 82. Second booster pipe; 83. Gas storage tank; 84 , exhaust pipe; 85, telescopic bag; 86, elastic rope; 9, indicator assembly; 91, long tube; 92, long rod; 93, warning frame; 94, indicator arrow; 95, LED lamp bead; 96, moving wheel; 10, wind cover; 11, rotating assembly; 111, rotating gear; 112, first disc; 113, second disc; 114, sliding sleeve; 115, bent rod; 116, fan; 12, air guide assembly; 121, flow equalizing net; 122, guide frame; 123, flow equalizing plate; 124, impeller; 125, guide fan; 13, buffer spring; 14, pressure relief pipe; 15, positioning cone; 16, annular slide rail; 17, limit slider. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0034] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] The following describes a permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to an embodiment of the present application with reference to the accompanying drawings.

[0042] like Figure 1-Figure 12 As shown, the permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to an embodiment of the present application includes: a fixed frame 1, one side of the fixed frame 1 is fixedly connected to an existing tunnel support frame 2, and the other side of the fixed frame 1 is fixedly connected to a newly built tunnel support frame 3 used in conjunction with the existing tunnel support frame 2;

[0043] The inner cavity of the fixed frame 1 is fixedly connected with a sealing frame 4, and the inner cavity of the fixed frame 1 is respectively provided with an air supply component 5, a conveying component 6 and a reinforcement component 7 used in conjunction with the existing tunnel support frame 2 and the newly built tunnel support frame 3;

[0044] An extension component 8 and an indication component 9 are respectively provided on one side of the fixing frame 1 away from the existing tunnel supporting frame 2 and the newly-built tunnel supporting frame 3 .

[0045] like Figures 6 to 9 It is shown that during the use of conventional support measures, not only is the operation complicated, but the construction and disassembly are difficult, and it is not possible to flexibly perform permanent support conversion operations on the combined openings of the existing tunnel and the newly built tunnel according to the construction and traffic needs. The air supply component 5 includes a driving motor 51, which is fixed in the inner cavity of the fixed frame 1. The output shaft of the driving motor 51 is fixedly connected to a driving gear 52, and one side of the driving gear 52 is meshed with a driven gear 53. The inner cavity of the driven gear 53 is fixedly connected to a concave rod 54, and the center of the concave rod 54 is rotatably connected to a rotating sleeve 55. The surface wall of the rotating sleeve 55 is fixedly connected to a connecting rod 56, and the other side of the connecting rod 56 is hinged with a piston 57 that is slidably matched with the sealing frame 4. When supporting the combined opening of the existing tunnel and the newly built tunnel, the driving motor 51 of the air supply component 5 first provides a driving source, and the driving gear 52 and the driven gear 53 drive the concave rod 54, the rotating sleeve 55, the connecting rod 56 and the piston 57 to perform reciprocating work and generate pressurized gas.

[0046] The conveying assembly 6 includes a first boosting pipe 61, two groups of first boosting pipes 61 are connected at one side of the sealing frame 4 close to the piston 57, the other ends of the two groups of first boosting pipes 61 are connected with a three-way joint 62, and both ends of the three-way joint 62 are connected with an arc main pipe 63 fixedly matched with the existing tunnel support frame 2 and the newly built tunnel support frame 3, the inner ends of the two groups of arc main pipes 63 are connected with a straight branch pipe 64, and the middle ends of the straight branch pipe 64 are connected with an arc branch pipe 65;

[0047] The reinforcement component 7 includes a reserved hole 71, and the reserved hole 71 is opened around the existing tunnel support frame 2 and the newly built tunnel support frame 3. One end of the two groups of straight branch pipes 64 and the arc branch pipe 65 is connected with a positioning cylinder 72, and the inner wall of the positioning cylinder 72 is slidably connected with a slide seat 73. One side of the two groups of slide seats 73 is fixedly connected with an anchor rod 74 used in conjunction with the reserved hole 71. One side of the two groups of slide seats 73 is fixedly connected with a pull rod 75, and the other side of the pull rod 75 is fixedly connected with a telescopic soft cover 76 used in conjunction with the existing tunnel support frame 2 and the newly built tunnel support frame 3. The two first ends of the conveying component 6 The booster pipe 61 is sequentially fed into the two sets of positioning tubes 72 of the reinforcement assembly 7 through two sets of three-way joints 62, arc main pipes 63, straight branch pipes 64 and arc branch pipes 65. Under the action of high-pressure gas pressure, the two sets of slide seats 73 are forced to drive the two sets of anchor rods 74 through the reserved holes 71 to reach the rock walls of the existing tunnel and the newly built tunnel entrances. At the same time, the two sets of telescopic soft covers 76 are pulled up by the two sets of pull rods 75 to protect the entrance area where the existing tunnel and the newly built tunnel are combined, so as to prevent accidents caused by the falling of debris and improve the passing and construction safety of the entrance where the existing tunnel and the newly built tunnel are combined.

[0048] And during the period of using conventional support measures to protect the existing tunnel and the newly built tunnel in combination with the entrance, the existing tunnel and the newly built tunnel need to be closed, resulting in inaccessibility to traffic, causing traffic congestion, and also having no indication function. The extension component 8 includes a limit cylinder 81, which is embedded in the side of the fixed frame 1 away from the existing tunnel support frame 2 and the newly built tunnel support frame 3. The other side of the sealing frame 4 close to the piston 57 is connected to a second boosting pipe 82, and the bottom end of the second boosting pipe 82 is connected to an air storage tank 83, the outlet of the air storage tank 83 is connected to an air outlet pipe 84, and the other end of the air outlet pipe 84 is connected to a telescopic bag 85 that slidably cooperates with the limit cylinder 81, and the inner cavity of the telescopic bag 85 is fixedly connected to an elastic rope 86;

[0049] The indicating assembly 9 comprises an elongated tube 91, which is embedded around the fixing frame 1 near the limiting tube 81. The inner cavity of the elongated tube 91 is slidably connected with an elongated rod 92. The side of the elongated rod 92 away from the fixing frame 1 is fixedly connected with a warning frame 93 fixedly matched with the telescopic bag 85. The upper and lower sides of the warning frame 93 are provided with indicating arrows 94, and the inner cavity of the indicating arrows 94 is embedded with LED lamp beads 95. Both sides of the bottom of the warning frame 93 are fixedly connected with moving wheels 96. According to the characteristics of insufficient light in the tunnel, when warning passing pedestrians and vehicles, the second boosting pipe 82 of the extension assembly 8 supplies the pressurized gas into the gas tank 83 for temporary storage, and forces the telescopic bag 85 in the limiting tube 81 through the outlet pipe 84. The bag 85 drives the elastic rope 86 and the warning frame 93 of the indicator assembly 9 to extend forward to a predetermined position. Under the sliding support of the long tube 91 and the long rod 92 and the movement of the two sets of moving wheels 96, after being in place, one set of indicating arrows 94 and LED lamp beads 95 on the warning frame 93 flash and point to the direction of the existing tunnel or the newly built tunnel accordingly, so that pedestrians and vehicles know the direction of travel to prevent obstruction of construction and accidents. The operation is simple, the construction and disassembly difficulty is low, and according to the construction and traffic requirements, the existing tunnel and the newly built tunnel are combined to realize the flexible permanent support conversion effect, and at the same time meet the traffic requirements of the existing tunnel or the newly built tunnel to prevent traffic congestion.

[0050] The outer surfaces of the two groups of anchor rods 74 are sleeved with buffer springs 13 used in conjunction with the slide seat 73 and the positioning tube 72 to buffer the insertion stroke of the two groups of anchor rods 74 and also provide elastic reset compensation for the two groups of anchor rods 74 in the reset state;

[0051] Two groups of anchor rods 74 and tie rods 75 are respectively distributed in a staggered state along the central axis of the existing tunnel support frame 2 and the newly built tunnel support frame 3, and the rock wall of the combined entrance of the existing tunnel and the newly built tunnel is tightly reinforced to improve the support stability of the combined entrance of the existing tunnel and the newly built tunnel to prevent shaking;

[0052] The outlet of the sealing frame 4 is connected to a pressure relief pipe 14. A pressure relief valve is provided at one end of the pressure relief pipe 14 away from the sealing frame 4 to exhaust and relieve the excess pressurized gas to prevent safety accidents caused by excessive gas pressure.

[0053] A positioning cone 15 is fixedly connected to one side of the existing tunnel support frame 2 and the newly built tunnel support frame 3 near the reserved hole 71 to pre-position the existing tunnel support frame 2 and the newly built tunnel support frame 3 with the existing tunnel and the newly built tunnel entrance rock wall to prevent dislocation.

[0054] like Fig.10 and Fig.11It is shown that due to the poor air circulation in the tunnel, dust will be generated during the construction process in the tunnel, and it is relatively hot and stuffy, it is not possible to provide fresh air function for the existing tunnel and the new tunnel combined with the cave entrance during the tunnel expansion period. The construction environment is poor, which causes harm to the health of the construction workers. The side of the fixed frame 1 close to the warning frame 93 is fixedly connected with a wind cover 10. The inner cavity of the wind cover 10 is respectively provided with a rotating component 11 and an air guide component 12. The rotating component 11 includes a rotating gear 111. The rotating gear 111 is meshed with the side of the driven gear 53 away from the driving gear 52, and the rotating gear 111 is away from the side of the driven gear 53. A first disc 112 is fixedly connected, and a second disc 113 used in conjunction with the first disc 112 is arranged on one side of the wind cover 10 close to the fixed frame 1. Slide sleeves 114 are embedded in the four sides of the first disc 112 and the second disc 113 facing each other, and a bent rod 115 is slidably connected to the inner wall of the slide sleeve 114. A fan 116 used in conjunction with the wind cover 10 is fixedly connected to the center of the second disc 113 away from the first disc 112, generating wind force in the wind cover 10, providing a fresh air source for the combined entrance of the existing tunnel and the newly built tunnel, and ventilating and cooling the area in front of the combined entrance of the existing tunnel and the newly built tunnel;

[0055] An annular slide rail 16 is provided on one side of the fixing frame 1 close to the wind shield 10. The inner cavity of the annular slide rail 16 is slidably connected with a limiting slider 17 fixedly matched with the second disc 113 around the inner cavity, providing rotation support compensation for the second disc 113, improving the rotation stability of the second disc 113, and preventing the second disc 113 from shaking and tilting during rotation.

[0056] The air guide assembly 12 includes a flow equalizing net 121, which is fixed on the side of the wind hood 10 away from the fixed frame 1, the upper and lower sides of the wind hood 10 are connected with a flow guide frame 122, and the air outlet of the flow guide frame 122 is fixedly connected with a flow equalizing plate 123, the side of the flow guide frame 122 close to the wind hood 10 is rotatably connected with an impeller 124 used in conjunction with the fan 116, and the other side of the impeller 124 is fixedly connected with a guide fan 125 used in conjunction with the flow equalizing plate 123, so as to ventilate and reduce heat around the existing tunnel and the newly built tunnel combined with the cave entrance, speed up the air flow speed in the tunnel, improve the comfort of the tunnel construction environment, and also play an auxiliary dust removal role, which is beneficial to the workers' construction work.

[0057] Specifically, the working principle of the permanent and temporary combined structure of the single-hole existing tunnel expansion and reconstruction is as follows: when supporting the tunnel entrance where the existing tunnel and the newly built tunnel are combined, a reinforcement groove is first chiseled out in the rock wall of the tunnel entrance where the existing tunnel and the newly built tunnel are combined, and the positioning cones 15 on the existing tunnel support frame 2 and the newly built tunnel support frame 3 are inserted into the rock wall of the tunnel entrance where the existing tunnel and the newly built tunnel are combined, and the reserved hole 71 is aligned with the reinforcement groove chiseled in advance, and then the drive motor 51 is controlled to start and drive the drive gear 52 to rotate, the drive gear 52 drives the concave rod 54 on the driven gear 53 to rotate, and the concave rod 54 drives the piston 57 on the connecting rod 56 through the rotating sleeve 55 to do up and down work in the sealing frame 4, and generate pressurized gas in the sealing frame 4, and the pressurized gas passes through the two first boosting pipes 61 The two groups of three-way joints 62 arrive in the two groups of arc main pipes 63, and then are supplied into the two groups of positioning tubes 72 by the two groups of straight branch pipes 64 and the two groups of arc branch pipes 65, and high pressure is generated in the two groups of positioning tubes 72, and the two groups of slides 73 are forced to drive the two groups of anchor rods 74 to pass through the reserved holes 71 on the existing tunnel support frame 2 and the newly built tunnel support frame 3 and insert into the reinforcement grooves chiseled in advance, so that the existing tunnel support frame 2 and the newly built tunnel support frame 3 complete the support work for the combined opening of the existing tunnel and the newly built tunnel. At the same time, the two groups of slides 73 drive the pull rod 75 to move up synchronously and drive the two groups of telescopic soft covers 76 to pull up, so that the two groups of telescopic soft covers 76 are close to the existing tunnel support frame 2 and the newly built tunnel support frame 3, and the existing tunnel support frame 2 and the newly built tunnel support frame 3 area are protected and shielded;

[0058] After the support work is completed at the combined entrance of the existing tunnel and the newly built tunnel, the valves on the two first boosting pipes 61 are closed, and the valve on the second boosting pipe 82 is opened. At the same time, the piston 57 continues to work, and the generated pressurized gas passes through the second boosting pipe 82 to reach the gas storage tank 83, and then the valve on the gas outlet pipe 84 is opened, and the pressurized gas in the gas storage tank 83 is supplied to the telescopic bag 85. With the continuous supply of the pressurized gas, the telescopic bag 85 is forced to extend forward in the limit tube 81, and the elastic rope 86 is pulled. The long tube 91 and the long rod 92 provide sliding support compensation for the warning frame 93, and the two sets of moving wheels 96 provide movement compensation for the warning frame 93. The telescopic bag 85 extending forward drives the warning frame 93 to move forward to a predetermined position. According to the current construction and traffic conditions of the existing tunnel and the newly built tunnel, one set of indicator arrows 94 and LED lamp beads 95 on the warning frame 93 are controlled to light up, and pedestrians and vehicles pass according to the arrows on the warning frame 93.

[0059] At the same time, the driving motor 51 drives the driven gear 53 to rotate through the driving gear 52, and the driven gear 53 also drives the rotating gear 111 to rotate. During this period, the piston 57 is still working, and the generated pressurized gas is supplied to the gas storage tank 83 through the second supercharging pipe 82 for temporary storage, and the valve on the gas outlet pipe 84 is closed. If the gas pressure in the gas storage tank 83 is too high, the pressure relief valve on the pressure relief pipe 14 can be directly opened to directly discharge the excess gas. Then the rotating gear 111 drives the first disc 112 to rotate, and the first disc 112 drives the three bent rods 115 to rotate through the sliding sleeve 114. The annular slide rail 16 and the limit slider 17 provide rotation support compensation for the second disc 113, and the three bent rods 115 drive the second disc 113 to rotate, and the second disc 113 drives the fan 116 to rotate and generate wind in the wind cover 10, and then the wind is blown forward evenly by the flow equalizing net 121 to blow the heat and assist in dust removal in the space in front of the fixed frame 1.

[0060] When the fan 116 rotates, it also drives the two sets of impellers 124 to rotate. The two sets of impellers 124 drive the two sets of guide fans 125 to rotate in the two sets of guide frames 122 and generate wind. The wind generated by the fan 116 flows into the two sets of guide frames 122 and merges with the wind generated by the two sets of guide fans 125. The merged wind passes through the two sets of flow equalizing plates 123 to blow to the space around the fixed frame 1 to reduce heat and assist in dust removal.

[0061] It should be noted that the specific model and specifications of the drive motor 51 need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be repeated in detail.

[0062] The power supply and principle of the driving motor 51 are clear to those skilled in the art and will not be described in detail here.

[0063] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0064] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A single-hole existing tunnel reconstruction and expansion combined with a permanent and temporary structure, characterized in that: include: A fixed frame (1), wherein one side of the fixed frame (1) is fixedly connected to an existing tunnel support frame (2), and the other side of the fixed frame (1) is fixedly connected to a newly built tunnel support frame (3) used in conjunction with the existing tunnel support frame (2); The inner cavity of the fixed frame (1) is fixedly connected to a sealing frame (4), and the inner cavity of the fixed frame (1) is respectively provided with an air supply component (5), a conveying component (6) and a reinforcement component (7) for use with an existing tunnel support frame (2) and a newly built tunnel support frame (3); An extension component (8) and an indication component (9) are respectively arranged on the side of the fixed frame (1) away from the existing tunnel support frame (2) and the newly-built tunnel support frame (3).

2. The permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to claim 1 is characterized in that: The air supply assembly (5) comprises a driving motor (51), the driving motor (51) being fixed in the inner cavity of the fixing frame (1), the output shaft of the driving motor (51) being fixedly connected to a driving gear (52), and one side of the driving gear (52) being meshed with a driven gear (53), the inner cavity of the driven gear (53) being fixedly connected to a concave rod (54), and the center of the concave rod (54) being rotatably connected to a rotating sleeve (55), the surface wall of the rotating sleeve (55) being fixedly connected to a connecting rod (56), and the other side of the connecting rod (56) being hinged to a piston (57) which is slidably matched with the sealing frame (4).

3. The permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to claim 2 is characterized in that: The conveying assembly (6) comprises a first boosting pipe (61), two groups of the first boosting pipe (61) are connected at one side of the sealing frame (4) close to the piston (57), the other ends of the two groups of the first boosting pipe (61) are connected to a three-way joint (62), and both ends of the three-way joint (62) are connected to an arc main pipe (63) fixedly matched with the existing tunnel support frame (2) and the newly built tunnel support frame (3), the inner ends of the two groups of the arc main pipes (63) are connected to a straight branch pipe (64), and the middle ends of the straight branch pipe (64) are connected to an arc branch pipe (65).

4. The permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to claim 3 is characterized in that: The reinforcement component (7) includes a reserved hole (71), and the reserved hole (71) is opened around the existing tunnel support frame (2) and the newly built tunnel support frame (3). One end of the two groups of straight branch pipes (64) and the arc branch pipe (65) is connected to a positioning cylinder (72), and the inner wall of the positioning cylinder (72) is slidably connected to a sliding seat (73). One side of the two groups of sliding seats (73) is fixedly connected to an anchor rod (74) used in conjunction with the reserved hole (71), and one side of the two groups of sliding seats (73) is fixedly connected to a pull rod (75), and the other side of the pull rod (75) is fixedly connected to a telescopic soft cover (76) used in conjunction with the existing tunnel support frame (2) and the newly built tunnel support frame (3).

5. The permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to claim 1 is characterized in that: The extension assembly (8) comprises a limiting cylinder (81), wherein the limiting cylinder (81) is embedded in a side of the fixing frame (1) away from the existing tunnel support frame (2) and the newly-built tunnel support frame (3); the other side of the sealing frame (4) close to the piston (57) is connected to a second boosting pipe (82), and the bottom end of the second boosting pipe (82) is connected to an air storage tank (83); the outlet of the air storage tank (83) is connected to an air outlet pipe (84), and the other end of the air outlet pipe (84) is connected to a telescopic bag (85) that is slidably matched with the limiting cylinder (81); and the inner cavity of the telescopic bag (85) is fixedly connected to an elastic rope (86).

6. The permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to claim 1 is characterized in that: The indicating assembly (9) comprises an elongated tube (91), the elongated tube (91) being embedded around the fixing frame (1) near the limiting tube (81), the inner cavity of the elongated tube (91) being slidably connected to an elongated rod (92), the side of the elongated rod (92) away from the fixing frame (1) being fixedly connected to a warning frame (93) fixedly matched with the telescopic bag (85), the upper and lower sides of the warning frame (93) being provided with indicating arrows (94), and the inner cavity of the indicating arrows (94) being embedded with LED lamp beads (95), and the two sides of the bottom of the warning frame (93) being fixedly connected to moving wheels (96).

7. The permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to claim 4 is characterized in that: The outer surfaces of the two groups of anchor rods (74) are sleeved with buffer springs (13) used in conjunction with the slide seat (73) and the positioning cylinder (72).

8. The permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to claim 4 is characterized in that: The two groups of anchor rods (74) and pull rods (75) are respectively distributed in a staggered state along the central axis of the existing tunnel support frame (2) and the newly built tunnel support frame (3).

9. The permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to claim 1 is characterized in that: The outlet of the sealing frame (4) is connected to a pressure relief pipe (14), and a pressure relief valve is provided at one end of the pressure relief pipe (14) away from the sealing frame (4).

10. The permanent and temporary combined structure for reconstruction and expansion of a single-hole existing tunnel according to claim 1 is characterized in that: A positioning cone (15) is fixedly connected to one side of the existing tunnel support frame (2) and the newly built tunnel support frame (3) close to the reserved hole (71).

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