A longitudinal grouting pipe with formwork for preventing voids in secondary tunnel lining

Abstract

The present invention discloses a tunnel secondary lining anti-emptying longitudinal grouting pipe with a mold, which relates to the technical field of tunnel secondary lining arch grouting with a mold, and comprises a rotating connecting pipe and a plurality of extension pipes. The plurality of extension pipes can be detachably connected to each other end to end, and a long pipe is formed after connection, and the long pipe is prefabricated in the secondary lining of the arch. The rotating connecting pipe is detachably connected to one end of the extension pipe. In addition, quick connectors are provided on the rotating connecting pipe and the plurality of extension pipes, and a connecting internal thread is provided on each pipe. The present invention can flexibly adapt to the needs of on-site working conditions by combining a rotating connecting pipe and a plurality of extension pipes, and solves the problem that the grouting pipe is too long to be flexibly operated. In addition, the quick connector and the connecting internal thread on the connecting pipe body and the extension pipe body can very conveniently realize the extension or truncation between pipes, and also facilitate the grouting connection, which greatly improves the work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel secondary lining arch grouting with mold, in particular to a tunnel secondary lining anti-emptying longitudinal grouting pipe with mold. Background Art

[0002] The quality defects of the tunnel secondary lining, such as hollowing and cavitation, are still common problems in the current secondary lining construction. According to the statistics of defects in the quality inspection and examination of the tunnel construction process and the quality inspection and acceptance of the completed project, there are many problems of hollowing and cavitation in the arch and waist of the secondary lining, and some of the problems are quite serious, which cause hidden dangers to the design structure and have a great impact on the operational safety of railways, highways and municipal roads. They have always been the focus of the railway, highway and municipal road construction units, railway bureaus, highway bureaus and the Quality Supervision and Administration Bureau of China Railway Corporation.

[0003] The main reasons for the voids and cavities in the arch and waist of the tunnel secondary lining are: (1) Due to poor working performance such as concrete fluidity and workability, the concrete does not flow well after being pumped into the arch formwork of the secondary lining trolley, resulting in partial failure to fill. (2) During the vibration process of the trolley arch formwork attached vibrator, the arch concrete may continue to sink and become void. (3) The designed longitudinal slope of the tunnel will cause the arch concrete to flow from the high end to the low end, which may easily cause the high end to not be filled. (4) When the concrete is capped, factors such as blockage of the pumping pipe and untimely concrete supply will cause the concrete entering the formwork to be close to initial setting and its fluidity is blocked, which may cause partial failure to fill.

[0004] The radial grouting of the RPC pipe with formwork for the second lining arch is a new technology promoted in the domestic railway tunnel construction in recent years. Before pouring concrete, the RPC grouting pipe is installed on the grouting pipe hole reserved at the center line of the trolley arch template. The pipe mouth is cut with a "cross" groove and pushed to the waterproof board and the initial support surface. The outer diameter of the pipe is 36mm and the inner diameter is 15mm. When the second lining concrete is capped and poured, it can also be judged whether the part is filled with concrete by whether the RPC pipe mouth overflows. The arch grouting with formwork is completed within 3-6 hours after the arch concrete capping is completed. Generally, 4 holes are arranged longitudinally on the 12m long second lining trolley. If the current hole is grouting, the adjacent hole is used as an exhaust hole. If the grouting pressure exceeds 1.0MPa or the adjacent hole overflows, it can be replaced with the next hole for grouting until all holes are grouted or overflowed. The grouting material with formwork can be purchased from the market as a finished micro-expansion mixture mortar, which can achieve the same strength as concrete. For specific content, please refer to the utility model patent: CN207297034U, tunnel secondary lining concrete arch backfill grouting device.

[0005] The problems with the above technical solution are: (1) Generally, a 12m trolley is equipped with 4 RPC grouting pipe holes, and the holes are arranged at intervals. Construction experience and radar detection have found that the voids and cavities in the arch concrete are irregular, and the void points may not be exactly at the grouting hole positions. Grouting may not be able to fill all the voids in the arch. (2) The grouting pipe holes and the adjacent exhaust pipe holes may not be spatially connected. Grouting and discharging the gas in the closed space is only an ideal condition. Therefore, even if the grouting pressure is reached, it may not be truly filled. (3) Radar non-destructive testing shows that this grouting process still cannot ensure that all the voids in the arch can be filled with grouting.

[0006] In order to solve the above problems, we have developed a new method: a grouting pipe is set on the top of the second lining arch along the arch axis. During the grouting backfill, the grouting pipe is pulled out while injecting slurry into the grouting pipe, so as to achieve a good backfill effect. However, during the pouring of the second lining concrete, the grouting pipe will be firmly stuck or even fixed in the concrete due to the solidification of the concrete, so it needs to be rotated continuously to prevent it from solidifying. In addition, because the pouring of the second lining of a tunnel is relatively long, if traditional pipes are used, it is impossible to flexibly connect with the grouting device, and because of the long length, the operation is very inconvenient. Summary of the invention

[0007] In order to solve the above problems, the present invention adopts the following technical solutions:

[0008] A tunnel secondary lining anti-emptying longitudinal grouting pipe with a mold, comprising a rotating connecting pipe and a plurality of extension pipes;

[0009] A plurality of the extension pipes can be detachably connected end to end to form a long pipe, which is prefabricated in the second lining of the vault;

[0010] The rotating connecting tube is detachably connected to one end of the extension tube.

[0011] Preferably, the rotating connecting tube comprises a connecting tube body;

[0012] A rotating tube quick connector is provided at one end of the connecting pipe body, and a connecting internal thread is provided on the inner wall of the other end;

[0013] A clamping portion is fixedly provided on the outer periphery of the connecting pipe body;

[0014] The extension tube comprises an extension tube body, one end of which is provided with a connecting external thread, and the connecting external thread matches and corresponds to the connecting internal thread;

[0015] An extension tube internal thread is arranged on the inner wall of the other end of the extension tube body. The extension tube internal thread has the same structure as the connecting internal thread and can be matched and connected with the connecting external thread on another extension tube.

[0016] Preferably, an extension tube quick connector is fixedly provided on the outer end of the connecting external thread;

[0017] The structure of the extension tube quick connector is the same as that of the rotating tube quick connector.

[0018] Preferably, the clamping portion is in a polygonal column structure.

[0019] Preferably, the polygonal column structure is a regular hexagon.

[0020] Preferably, the rotating tube quick connector and the extension tube quick connector are both F-type quick connectors.

[0021] Preferably, the rotating connecting tube and the extension tube are both made of stainless steel.

[0022] The present invention can flexibly adapt to the needs of on-site working conditions by combining a rotating connecting pipe and multiple extension pipes, thereby solving the problem that the grouting pipe is too long to be flexibly operated. In addition, the quick connector and the connecting internal thread on the connecting pipe body and the extension pipe body can very conveniently realize the extension or truncation between pipes, and also facilitate the grouting connection, greatly improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the grouting pipe provided by the present invention;

[0024] Figure 2 It is a structural schematic diagram of a rotating connecting pipe;

[0025] Figure 3 It is a schematic diagram of the structure of the extension tube;

[0026] Figure 4 It is the overall structure diagram of the tunnel secondary lining arch anti-emptying longitudinal pipe withdrawal type molded grouting equipment;

[0027] Figure 5 It is a structural diagram of the rotating mechanism in the longitudinal pipe-retracting type grouting equipment with mold for preventing the secondary lining arch of the tunnel from falling out;

[0028] Figure 6 It is a structural diagram of the first clamping device in the tunnel secondary lining arch anti-emptying longitudinal pipe withdrawal type molded grouting equipment;

[0029] Figure 7 This is a structural diagram of the base of the tunnel secondary lining arch anti-emptying longitudinal pipe withdrawal type molded grouting equipment;

[0030] Figure 8 It is a structural diagram of the pipe pulling mechanism in the longitudinal pipe withdrawal type grouting equipment with mold for preventing hollowing out of the arch of the secondary lining of the tunnel;

[0031] Fig. 9 It is a stereoscopic diagram from another angle of the tube pulling mechanism in the tunnel secondary lining arch anti-emptying longitudinal tube withdrawal type with-form grouting equipment;

[0032] Fig.10 It is an exploded view of the pipe pulling mechanism in the longitudinal pipe withdrawal type grouting equipment with mold for preventing the secondary lining arch of the tunnel from falling out;

[0033] Fig.11 This is a structural diagram of the tunnel secondary lining arch anti-emptying longitudinal pipe-retracting grouting equipment with mold, including the longitudinal slide, lifting platform and overall support frame;

[0034] Fig.12 It is a schematic diagram of the grouting pipe after being inserted into the anti-emptying longitudinal pipe-withdrawing grouting equipment with mold in the arch of the secondary lining of the tunnel. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the implementation mode of the present application clearer, the following will be combined with the implementation mode of the present application. Figures 1 to 11 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. 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 application for which protection is sought, but merely represents selected embodiments of the present application.

[0036] like Figure 1 As shown, a tunnel secondary lining anti-emptying longitudinal grouting pipe with a mold includes a rotating connecting pipe 70 and a plurality of extension pipes 71. The plurality of extension pipes 71 can be detachably connected to each other end to form a long pipe, which is prefabricated in the secondary lining of the vault. In order to prevent corrosion, the rotating connecting pipe 70 and the extension pipe 71 are both made of stainless steel. The rotating connecting pipe 70 is detachably connected to one end of the extension pipe 71.

[0037] Specifically, Figure 2As shown, the rotating connecting pipe 70 includes a connecting pipe body 700. The connecting pipe body 700 is a stainless steel pipe. A rotating pipe quick connector 701 is provided at one end of the connecting pipe body 700. The rotating pipe quick connector 701 is a common F-type stainless steel quick connector, which can be quickly connected to an external joint. A connecting internal thread 703 is provided on the inner wall of the other end of the connecting pipe body 700. The connecting internal thread 703 is used to interconnect and communicate with the extension pipe 71. In addition, since the grouting pipe 7 needs to be continuously rotated to prevent it from being solidified by concrete, in order to increase the clamping force during rotation, a clamping portion 702 is fixedly provided on the periphery of the connecting pipe body 700.

[0038] like Figure 3 As shown, the extension tube 71 includes an extension tube body 710, which is also a stainless steel tube, and its specifications are the same as those of the above-mentioned connecting tube body 700, but the length is longer. One end of the extension tube body 710 is provided with a connecting external thread 712, and the connecting external thread 712 matches and corresponds to the connecting internal thread 703. The two pipes can be combined with each other through threaded connection and transmit torque. The inner wall of the other end of the extension tube body 710 is provided with an extension tube internal thread 713, and the extension tube internal thread 713 has the same structure as the connecting internal thread 703, and can match and connect with the connecting external thread 712 on another extension tube 71.

[0039] It should be noted that the connection method of the above two pipes is not limited to threaded connection, and can also adopt a snap connection method, a sleeve connection method, etc. As long as the two pipes can be connected and the torque can be transmitted, it falls within the scope of the present invention.

[0040] Considering that the grouting is affected by the excessive length of the grouting pipe 7 during its outward movement, an extension pipe quick connector 711 is fixedly provided at the outer end of the external thread 712, so that it can be removed after pulling out a whole extension pipe 71, and the next extension pipe can be used to grout the second lining vault, which greatly facilitates the operation of the operator. It should be noted that the structure of the extension pipe quick connector 711 is the same as that of the rotating pipe quick connector 701, so that it can be arbitrarily combined into a required length to adapt to the on-site conditions.

[0041] In addition, the clamping portion 702 is a polygonal column structure, and in this embodiment, the polygonal column structure is preferably a regular hexagon, which can transmit torque well in conjunction with the corresponding clamping mechanism.

[0042] At the same time, it should be noted that the rotating tube quick connector 701 and the extension tube quick connector 711 are both F-type quick connectors, so that they can be combined arbitrarily without affecting their respective functions.

[0043] In order to clearly explain the use process of the longitudinal grouting pipe with mold for preventing the secondary lining of the tunnel from degassing, it is necessary to explain it in conjunction with another longitudinal retreat-type grouting equipment with mold for preventing the arch of the secondary lining of the tunnel from degassing invented by the inventor.

[0044] like Figures 4 to 12 As shown, the tunnel secondary lining arch anti-emptying longitudinal pipe withdrawal type molded grouting equipment includes a base 1, a rotating mechanism 2, and a pipe pulling mechanism 3.

[0045] The rotating mechanism 2 and the pipe pulling mechanism 3 are respectively fixed on the base 1, and the centers of the two are located on the same straight line. The rotating mechanism 2 includes a rotating device 20 and a first clamping device 21. Among them, the rotating device 20 is a hollow structure, and a grouting pipe 7 can be penetrated therein. The rotating device 20 can be made of a rotary reducer or a swing hydraulic cylinder. The rotating part of the rotating device 20 is fixedly connected to the first clamping device 21. The rotating part of the rotating device 20 can drive the first clamping device 21 to rotate at a certain angle. The first clamping device 21 can adopt a clamping mechanism commonly used on machine tools, or other forms of clamping methods, as long as the clamping or loosening of the grouting pipe 7 can be easily achieved.

[0046] The tube pulling mechanism 3 includes a second clamping device 30, a linear motion mechanism 31 and a tube pulling connecting frame 32. The linear motion mechanism 31 is fixedly arranged on the base 1. The linear motion mechanism 31 can be a linear hydraulic cylinder, a linear air cylinder or a linear electric cylinder and a screw transmission mechanism, etc., as long as it can achieve linear reciprocating motion. The moving part of the linear motion mechanism 31 is fixedly connected to the tube pulling connecting frame 32, and one side of the tube pulling connecting frame 32 is fixedly connected to the second clamping device 30. The second clamping device 30 is similar in structure to the first clamping device 21, and can refer to each other or be used interchangeably.

[0047] In order to make the structure more compact and the force more reasonable, the base 1 includes a bottom plate 10, a rotating mechanism fixing platform 11, a door frame 13, and a support arm 14. The rotating mechanism fixing platform 11 is fixedly arranged at one end of the bottom plate 10, and a rotating device 20 is fixedly arranged on the rotating mechanism fixing platform 11. The rotating mechanism fixing platform 11 is an inverted U-shaped structure, and the purpose is to raise the rotating device 20. Its specific structure can be welded by using channel steel or plate.

[0048] A door frame 13 is fixedly provided at the other end of the bottom plate 10, and the door frame 13 is perpendicular to the bottom plate 10. The door frame 13 is an arch-shaped structure, and a linear motion mechanism 31 is fixedly provided on both sides of the door frame 13 close to the rotating device 20 by screws. Two support arms 14 are fixedly provided on both sides of the other side of the door frame 13 away from the rotating device 20, and the support arms 14 are vertically provided on the door frame 13. In order to make the structure more solid, a rib plate 15 is also fixedly provided between the support arm 14 and the door frame 13.

[0049] The tube extraction connection frame 32 includes a guide rail 320 , a sliding block 321 , a supporting connection beam 322 , and a supporting connection flange 323 .

[0050] The guide rails 320 are square guide rails, which are fixedly arranged on the support arms 14 by screws. The sliders 321 are slidably arranged on the guide rails 320 .

[0051] The support connecting beam 322 is an L-shaped structure, and its bottom is fixed on the slider 321 by screws. A support connecting flange 323 is fixedly provided on one side of the middle part of the support connecting beam 322. The moving part of the linear motion mechanism 31 is fixedly connected to the support connecting beam 322, and the forward and backward movement of the moving part of the linear motion mechanism 31 can drive the support connecting beam 322 and the slider 321 to slide forward and backward along the guide rail 320. The support connecting flange 323 is fixedly connected to the second clamping device 30.

[0052] In addition, a hollow groove 12 is provided on the bottom plate 10. The hollow groove 12 can reduce the weight and can also prevent the first clamping device 21 from interfering with the bottom plate due to height issues when rotating.

[0053] In order to simplify the structure and reduce the cost, the rotating device 20 is a swinging hydraulic cylinder with a flange, and the swing angle of the hydraulic cylinder is 60 degrees. The first clamping device 21 includes a rotating pipe flange 210, a rotating pipe fixed semi-cylinder 211, a rotating pipe slide fixed ear 212, a rotating pipe slide 213, a rotating pipe movable semi-cylinder 214 and a clamping cylinder 215. Among them, the rotating pipe flange 210 is a disc-shaped structure, and a through hole is opened in the center for inserting the grouting pipe 7. A rotating pipe fixed semi-cylinder 211 is fixedly arranged around the center of the circle on one side of the rotating pipe flange 210. The rotating pipe fixed semi-cylinder 211 is a semi-cylindrical structure, and a polygonal through hole is opened on the central axis along the axial direction, and the through hole is used as a clamp for clamping the grouting pipe 7. The rotating pipe slide fixed ears 212 are fixedly arranged on both sides of the rotating pipe fixed semi-cylinder 211. The rotating tube slide bar fixing ear 212 is a vertically arranged sleeve structure, in which the rotating tube slide bar 213 can be passed and fixed.

[0054] The rotating tube movable semi-cylinder 214 is also a semi-cylindrical structure, with a clamping opening in the center, corresponding to the above-mentioned rotating tube fixed semi-cylinder 211, but it is not fixed on the rotating tube flange 210. Rotating tube sliding sleeves 2140 are vertically fixed on both sides of the rotating tube movable semi-cylinder 214, and the rotating tube movable semi-cylinder 214 corresponds to and matches with the rotating tube fixed semi-cylinder 211.

[0055] The clamping cylinder 215 is a linear motion cylinder, such as a hydraulic cylinder, a pneumatic cylinder or an electric cylinder, etc. A rotating tube slide rod 213 is fixedly provided on both sides of its cylinder body. The rotating tube slide rod 213 is inserted into the rotating tube sliding sleeve 2140 and the rotating tube slide rod fixing ear 212.

[0056] The bottom of the rotating tube movable semi-cylinder 214 is fixedly connected to one end of the piston rod 2150 of the clamping cylinder 215. The piston rod 2150 can be extended and retracted to drive the rotating tube movable semi-cylinder 214 to slide up and down along the rotating tube slide bar 213. The rotating part of the rotating device 20 is fixedly connected to the rotating tube flange 210.

[0057] In order to further simplify the structure and reduce the cost, the linear motion mechanism 31 adopts a linear hydraulic cylinder for easy purchase and assembly.

[0058] The second clamping device 30 includes a pipe pulling flange 300, a pipe pulling fixed semi-cylinder 301, a pipe pulling slide fixing ear 303, a pipe pulling slide 304, a pipe pulling movable semi-cylinder 305 and a pipe pulling clamping cylinder 306. The pipe pulling flange 300 is a disc-shaped structure, and a through hole is opened in the center thereof for passing the grouting pipe 7. A pipe pulling fixed semi-cylinder 301 is fixedly arranged on one side of the pipe pulling flange 300, and a pipe pulling slide fixing ear 303 is fixedly arranged on both sides of the pipe pulling fixed semi-cylinder 301, and a pipe pulling slide 304 is fixedly arranged in the pipe pulling slide fixing ear 303. A pipe pulling movable semi-cylinder 305 can also be slidably arranged on the pipe pulling slide 304. The bottom of the pipe pulling slide 304 is fixedly connected to the pipe pulling clamping cylinder 306. The piston rod 3060 of the pipe pulling clamping cylinder 306 is fixedly connected to the bottom of the pipe pulling movable semi-cylinder 305. As can be seen from the above and the figure, the structure of the second clamping device 30 is very similar to that of the first clamping device 21, except that the shape of the clamping opening is not exactly the same. Figure 8 It can be seen that the clamping opening of the second clamping device 30 is a square structure. Figure 5 It can be seen that the clamping opening of the first clamping device 21 is a hexagonal structure. Such a design can effectively prevent the grouting pipe 7 from being difficult to disengage from the clamping opening due to the same structure.

[0059] In addition, in order to further ensure that the grouting pipe 7 is not easily loosened after being clamped by the first clamping device 21 and the second clamping device 30, the central through hole of the pipe pulling flange 300 is not on the same axis as the central through hole of the pipe rotating flange 210. In other words, the clamping opening of the first clamping device 21 and the clamping opening of the second clamping device 30 are not on the same axis, and the two are staggered at a certain distance in horizontal position, such as 1 to 3 cm, so that the grouting pipe 7 can be pulled out from the clamping opening by the staggered force.

[0060] Since the device is heavy and inconvenient to adjust, in order to solve this problem, a longitudinal slide 4 is also included, which includes a slide rail 40, a slide block 41, a slide base 42, a slide bearing seat 43, a slide screw 45 and a slide turntable 46. Two slide rails 40 are fixedly arranged on the slide base 42 in parallel.

[0061] The two slide rails 40 are slidably provided with slide blocks 41, and the bottom plate 10 is fixedly connected to the slide blocks 41. A slide bearing seat 43 is fixedly provided on one side of the slide base 42, and a bearing is provided therein, and a slide screw 45 is rotatably passed through the bearing. One end of the slide screw 45 is rotatably connected to the bottom of the bottom plate 10, and the other end of the slide screw 45 is fixedly connected to the slide turntable 46.

[0062] In addition, a lifting platform 5 is also included, and the lifting platform 5 includes a lifting platform base 50, a lifting platform sliding sleeve 51, a lifting platform slide rod 52, a lifting platform screw rod 53, and a lifting platform turntable 54. A plurality of lifting platform sliding sleeves 51 are fixedly arranged on the lifting platform base 50, and a lifting platform slide rod 52 is slidably inserted in the lifting platform sliding sleeve 51, and the top of the lifting platform slide rod 52 is fixedly connected to the bottom of the slide base 42. The bottom of the slide base 42 is also rotatably connected to the lifting platform screw rod 53, and the lifting platform screw rod 53 is inserted in the lifting platform base 50. A lifting platform turntable 54 is also rotatably arranged on the lifting platform base 50, and a threaded hole is opened in the center of the lifting platform turntable 54, and the threaded hole matches the lifting platform screw rod 53, and the lifting platform screw rod 53 is inserted in the threaded hole of the lifting platform turntable 54.

[0063] The overall support frame 6 is also included, and the overall support frame 6 includes a top plate 60 and support legs 61. Four support legs 61 are fixedly arranged at the four corners of the bottom of the top plate 60. A lifting platform base 50 is fixedly arranged on the top of the top plate 60, and a slide rod hole 600 is opened on the top plate 60, and the lifting platform slide rod 52 can be inserted into the slide rod hole 600.

[0064] The clamping cylinder 215 , the linear motion mechanism 31 , and the tube pulling clamping cylinder 306 are all linear hydraulic cylinders, linear air cylinders, or linear electric cylinders.

[0065] In addition, it also includes a control system and a grouting device. The control system includes a controller and a solenoid valve, a contactor or a frequency converter. The grouting device includes a grouting pump, a grouting hose and a pressure gauge. The inlet and outlet of the grouting pump are respectively connected to the grouting hose, and the grouting hose at the outlet of the grouting pump is connected to the outer end of the grouting pipe pre-buried in the second lining arch; the pressure gauge is used to detect the pressure in the grouting pipe. The output end of the controller is connected to the solenoid valve and the contactor respectively, and the solenoid valve is used to control the action of the linear motion mechanism and the clamping device. The contactor or frequency converter is used to control the grouting pump. In order to facilitate external control, the controller is also connected to the control button or communication module to receive external control instructions. The communication module includes a wireless communication module or a wired communication module, which can realize remote control. Since such a control system is relatively simple, it is a common timing control method, such as PLC control or single-chip microcomputer control, and the grouting mechanism is also an existing technology, so it will not be described in detail here.

[0066] When working, first Figure 1 The tunnel secondary lining arch anti-emptying longitudinal pipe-retracting type molded grouting equipment shown is transported and moved to a trolley, and the height of the slide base 42 can be adjusted up and down by rotating the lifting platform turntable 54. When the lifting platform turntable 54 rotates forward, the lifting platform screw 53 is relatively reversed, the lifting platform screw 53 rises, and the slide base 42 also rises, and vice versa. When the slide turntable 46 is rotated, the slide screw 45 is also driven to rotate, and the slide screw 45 drives the bottom plate 10 to move longitudinally along the slide guide rail 40 to achieve left and right adjustment. The above mechanisms are all mature technologies and can be directly applied or referenced.

[0067] After adjusting the rotating mechanism 2 to the grouting pipe 7 pre-buried in the second lining vault by using the lifting platform 5 and the longitudinal slide 4, the grouting pipe 7 is inserted into the rotating mechanism 2 and the pipe pulling mechanism 3, and extends from the tail of the pipe pulling mechanism 3, as shown in FIG. Fig.12 As shown, the structure of the tunnel is omitted in the figure. A hose connected to the cement slurry is put on the end of the grouting pipe 7, and a connector matching the F-type connector is also provided at the end of the hose, so that a quick connection can be achieved. It should be noted here that the first clamping device 21 should be clamped on the clamping portion (702) to better transmit torque.

[0068] After installation, the control system is started. The control system first controls the swing hydraulic cylinder as the rotating device 20 to return to its original position, that is, the first clamping device 21 is perpendicular to the ground; then the clamping cylinder 215 in the first clamping device 21 is controlled to push out its piston rod 2150, thereby driving the rotating semi-cylinder 214 to move upward and clamp the clamping part (702) on the grouting pipe 7. At this time, the pipe pulling mechanism 3 does not work and is in a loose state. After the first clamping device 21 clamps the clamping portion (702) on the grouting pipe 7, the rotating device 20 drives the first clamping device 21 and the clamping portion (702) on the grouting pipe 7 to rotate 60°; then the clamping cylinder 215 is controlled to retract its piston rod 2150, thereby releasing the clamping portion (702) on the grouting pipe 7; after releasing, the rotating device 20 rotates 60° in the opposite direction and returns to the original state; then the clamping cylinder 215 in the first clamping device 21 is controlled to push out its piston rod 2150, thereby driving the rotating pipe movable semi-cylinder 214 to move upward and clamp the grouting pipe 7; then the rotating device 20 drives the first clamping device 21 and the grouting pipe 7 to rotate 60°. This cycle is repeated to continuously realize the rotation of the grouting pipe 7. For each rotation of the grouting pipe 7, the rotating mechanism 2 needs to cooperate 6 times. Such a design can avoid the pipeline connected to the clamping cylinder 215 from being entangled and causing failure. Through the above-mentioned rotation, the problem of the grouting pipe 7 being firmly fixed due to the solidification of concrete can be prevented.

[0069] When the concrete of the second lining reaches a certain hardness, cement slurry begins to be injected into the vault cavity. At this time, the control system first stops the rotation operation of the rotating mechanism 2 and controls the first clamping device 21 to loosen. Then the tube pulling clamping cylinder 306 on the second clamping device 30 is controlled to extend its piston rod 3060, driving the tube pulling movable semi-cylinder 305 to clamp the grouting pipe 7; after clamping, the linear motion mechanism 31 is controlled to move outward, that is, the piston rod of the hydraulic cylinder extends outward. During the extension process, the grouting pipe 7 can be driven to be pulled out a distance. After the pulling action is completed, the control system controls the grouting pump to pump cement slurry from the hose into the grouting pipe 7, thereby realizing a step of grouting. During the grouting process, the pressure on the pipeline can be used to determine whether it is full. After it is full, the grouting at this stage can be stopped and the next grouting cycle can be entered. After the grouting is full, the control system controls the grouting pump to stop working, and then repeats the above-mentioned actions again: control the tube pulling clamping cylinder 306 on the second clamping device 30 to extend its piston rod 3060, driving the tube pulling movable semi-cylinder 305 to clamp the grouting pipe 7; after clamping, control the linear motion mechanism 31 to move outward, that is, the piston rod of the hydraulic cylinder extends outward. During the extension process, the grouting pipe 7 can be driven to be pulled out a distance. After the pulling out action is completed, the control system controls the grouting pump to pump cement slurry from the hose into the grouting pipe 7. This cycle is repeated, and the grouting work can be completed little by little. Due to the use of hydraulic clamping and tube pulling, the workload of the operator is greatly reduced.

[0070] During the grouting and pipe pulling process, if one extension pipe (71) has been pulled out, the two adjacent extension pipes (71) can be rotated in opposite directions or the connecting pipe (70) can be rotated to separate the two from each other, and then the joint of the grouting hose can be connected to the extension pipe quick connector (711) of the next extension pipe (71). In this way, it can be ensured that the length of the grouting pipe 7 outside is not too long, thereby not affecting the grouting operation.

Claims

1. A tunnel secondary lining anti-emptying longitudinal molded grouting pipe, characterized in that: It comprises a rotating connecting tube (70) and a plurality of extension tubes (71); A plurality of the extension pipes (71) can be detachably connected end to end to form a long pipe, which is prefabricated in the second lining of the vault; The rotating connecting tube (70) is detachably connected to one end of the extension tube (71); The rotating connecting pipe (70) comprises a connecting pipe body (700); One end of the connecting pipe body (700) is provided with a rotating pipe quick connector (701), and the inner wall of the other end is provided with a connecting internal thread (703); A clamping portion (702) is fixedly provided on the outer periphery of the connecting pipe body (700), and the clamping portion (702) is in a polygonal column structure; The extension tube (71) comprises an extension tube body (710), one end of the extension tube body (710) is provided with a connecting external thread (712), and the connecting external thread (712) and the connecting internal thread (703) are matched and correspond to each other; An extension tube internal thread (713) is provided on the inner wall of the other end of the extension tube body (710); the extension tube internal thread (713) has the same structure as the connecting internal thread (703) and can be matched and connected with the connecting external thread (712) on another extension tube (71); An extension tube quick connector (711) is also fixedly provided on the outer end of the connecting external thread (712); The structure of the extension tube quick connector (711) is the same as that of the rotating tube quick connector (701); wherein, During implementation, when pouring concrete into the second lining vault, the rotating connecting pipe (70) is first connected to the joint of the grouting hose through the rotating pipe quick connector (701), and the rotating connecting pipe (70) is driven to rotate to drive the extension pipe (71) to rotate together; when the concrete of the second lining reaches a certain hardness, the rotating connecting pipe (70) is stopped from being driven to rotate, and the grouting pipe is driven to extend outwards for a certain distance, and then cement slurry is pumped into the grouting pipe. After the grouting at this stage is full, the grouting pipe is driven to extend outwards for a certain distance, and then cement slurry is pumped into the grouting pipe until the grouting at this stage is full, and the operation is repeated until the grouting of the second lining vault at this point is completed.

2. The tunnel secondary lining anti-emptying longitudinal molded grouting pipe according to claim 1 is characterized by: The polygonal column structure is a regular hexagon.

3. The tunnel secondary lining anti-emptying longitudinal molded grouting pipe according to claim 1 is characterized by: The rotating tube quick connector (701) and the extension tube quick connector (711) are both F-type quick connectors.

4. A tunnel secondary lining anti-emptying longitudinal molded grouting pipe according to claim 1 or 2, characterized in that: The rotating connecting tube (70) and the extension tube (71) are both made of stainless steel.

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