CN110617085A - Tunnel secondary lining anti-hollow longitudinal strip mold grouting pipe - Google Patents

Abstract

The invention discloses a tunnel secondary lining anti-stripping longitudinal strip mold grouting pipe, relates to the technical field of strip mold grouting of a tunnel secondary lining arch part, and comprises a rotary connecting pipe and a plurality of extension pipes. Many the extension pipe can be connected by mutually dismantling end to end, forms a long pipe after the connection, and this long pipe is prefabricated in two linings of vault. The rotary connecting pipe is detachably connected with one end of the extension pipe. In addition, all be provided with the high-speed joint head on rotating connecting pipe and many extension pipes, all be provided with on each pipe and connect the internal thread. The invention can flexibly adapt to the requirement of the field working condition by combining the rotary connecting pipe and the plurality of extension pipes, and solves the problem that the grouting pipe is too long and cannot be flexibly operated. In addition, the quick connectors and the connection internal threads on the connecting pipe body and the extension pipe body can conveniently realize the extension or cut between pipes, the grouting connection is also convenient, and the working efficiency is greatly improved.

Description

Tunnel secondary lining anti-hollow longitudinal strip mold grouting pipe

Technical Field

The invention relates to the technical field of strip mold grouting of a secondary lining arch part of a tunnel, in particular to a secondary lining anti-void longitudinal strip mold grouting pipe of the tunnel.

Background

The problems of secondary lining void and cavity quality defect of the tunnel are still the common problems of the current secondary lining construction. According to the conventional statistical data of the defect problems of quality detection and inspection in the tunnel engineering construction process and quality detection and acceptance of completion of engineering, the problems of hollowing and cavities of arch parts and arch waists of the two linings are more, the partial problems are more serious, the potential safety hazard of the design structure is caused, the safety influence on the operation safety of railways, highways and municipal roads is greater, and the two linings are always concerned by the railway, highway, municipal road construction units, railway bureaus, public bureaus and total railway quality supervision and management bureaus.

The reasons for the void and cavity at the arch part and the arch waist part of the tunnel secondary lining are as follows: (1) due to poor working performance of concrete such as fluidity, workability and the like, the concrete is not good in fluidity and is not filled locally after being pumped into the arch part template of the two-lined trolley. (2) The phenomenon that the arch concrete continuously sinks to be emptied possibly exists in the vibrating process of the trolley arch formwork attaching vibrator. (3) The tunnel design longitudinal slope tends to make the concrete of the arch part flow from the high end to the low end, and the high end is easily not filled. (4) When the concrete is capped, the factors of pumping pipes, blocking pipes, untimely concrete supply and the like cause the condition that the flowability of the concrete entering the mold is blocked due to the approach of initial setting, and the local part is not filled with the concrete.

Two lining vault area mould RPC pipe radial grouting is the new technique of the domestic railway tunnel construction popularization in recent years. And before concrete is poured, an RPC grouting pipe is arranged on a grouting pipe hole reserved in the center line position of the formwork of the arch part of the trolley, a pipe orifice is cut into a cross-shaped groove and jacked to the waterproof plate and the primary support surface, the outer diameter of the pipe is 36mm, the inner diameter of the pipe is 15mm, and whether the position is filled with concrete or not can be judged by judging whether the RPC pipe orifice overflows the concrete or not when the secondary lining concrete is capped and poured. And (3) completing arch part mould grouting within 3-6h after the vault concrete top sealing grouting is completed, generally longitudinally arranging 4 holes on a 12m long two-lining trolley, taking the adjacent hole as an exhaust hole if the hole is grouted, and replacing the next hole for grouting if the grouting pressure exceeds 1.0MPa or the adjacent hole overflows, until all holes are grouted or overflowed. The slurry with the mold can purchase the finished product of the micro-expansion mixture mortar in the market, and can achieve the same strength of concrete. For details, reference may be made to the utility model patent: CN207297034U, tunnel secondary lining concrete arch top backfill grouting device.

The problems existing in the technical scheme are as follows: (1) generally, a 12m trolley is provided with 4 holes of RPC grouting pipes, the holes are arranged at intervals, and construction experience and radar detection show that the concrete void and the cavity of the arch crown are irregular, the void point is unlikely to be right at the position of the grouting hole, and grouting is unlikely to fill all the voids of the arch part. (2) The grouting pipe hole is not necessarily in spatial communication with the adjacent exhaust pipe hole, and it is only an ideal situation to exhaust the gas in the closed space while grouting, so that the grouting pressure is not necessarily true full. (3) Radar nondestructive testing shows that the grouting process still cannot ensure that the arch part is empty and can be grouted and refilled and full.

In order to solve the above problems, we have developed a new method: and a grouting pipe is arranged on the top of the arch crown of the two linings along the axial direction of the arch, and the grouting pipe is pulled out while grout is injected into the grouting pipe during grouting backfilling, so that a good backfilling effect can be realized. However, during the casting of the secondary lining concrete, the grouting pipe is firmly stuck or even fixed in the concrete due to the solidification of the concrete, and thus it is required to be continuously rotated to prevent it from being solidified. In addition, because the pouring of one section of tunnel secondary lining is longer, if use traditional tubular product, can't realize being connected with slip casting device in a flexible way, because length overlength moreover, the operation is very inconvenient.

Disclosure of Invention

In order to solve the problems, the invention adopts the following technical scheme:

a tunnel secondary lining anti-hollow-out longitudinal belt mold grouting pipe comprises a rotary connecting pipe and a plurality of extension pipes;

the plurality of extension pipes can be detachably connected end to form a long pipe, and the long pipe is prefabricated in the second vault lining;

the rotary connecting pipe is detachably connected with one end of the extension pipe.

Preferably, the rotary connection pipe includes a connection pipe body;

one end of the connecting pipe body is provided with a rotating pipe quick connector, and the inner wall of the other end of the connecting pipe body is provided with a connecting internal thread;

the periphery of the connecting pipe body is fixedly provided with a clamping part;

the extension pipe comprises an extension pipe body, wherein one end of the extension pipe body is provided with a connecting external thread, and the connecting external thread and the connecting internal thread are matched and correspond to each other;

the inner wall of the other end of the extension pipe body is provided with an extension pipe internal thread, the extension pipe internal thread is the same as the connection internal thread in structure and can be connected with the connection external thread on the other extension pipe in a matched mode.

Preferably, an extension pipe quick connector is fixedly arranged at the outer end part of the connecting external thread;

the structure of the extension pipe quick connector is the same as that of the rotary pipe quick connector.

Preferably, the clamping part is in a polygonal column structure.

Preferably, the polygonal column structure is a regular hexagon.

Preferably, the rotating pipe quick connector and the extension pipe quick connector are both F-shaped quick connectors.

Preferably, the rotary connecting pipe and the extension pipe are both made of stainless steel materials.

The invention can flexibly adapt to the requirement of the field working condition by combining the rotary connecting pipe and the plurality of extension pipes, and solves the problem that the grouting pipe is too long and cannot be flexibly operated. In addition, the quick connectors and the connection internal threads on the connecting pipe body and the extension pipe body can conveniently realize the extension or cut between pipes, the grouting connection is also convenient, and the working efficiency is greatly improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a grouting pipe provided by the present invention;

FIG. 2 is a schematic view of a rotary joint pipe;

FIG. 3 is a schematic view of the structure of the extension tube;

FIG. 4 is a general structure diagram of a tunnel secondary lining arch anti-void longitudinal pipe withdrawing type belt mold grouting device;

FIG. 5 is a structural diagram of a rotating mechanism in the anti-void longitudinal pipe withdrawing type belt mold grouting equipment for the secondary lining arch part of the tunnel;

FIG. 6 is a structural diagram of a first clamping device in the anti-void longitudinal pipe withdrawing type belt mold grouting equipment for the secondary lining arch part of the tunnel;

FIG. 7 is a structural diagram of a base in the anti-void longitudinal pipe withdrawing type belt mold grouting equipment for the secondary lining arch part of the tunnel;

FIG. 8 is a structural diagram of a pipe drawing mechanism in the anti-void longitudinal pipe withdrawing type belt mold grouting equipment for the secondary lining arch part of the tunnel;

FIG. 9 is a perspective view of another perspective of a tube drawing mechanism in the anti-void longitudinal withdrawal type molded grouting equipment for the secondary lining arch of the tunnel;

FIG. 10 is an exploded view of a pipe drawing mechanism in the anti-void longitudinal pipe withdrawal type belt mold grouting equipment for the secondary lining arch part of the tunnel;

FIG. 11 is a structural diagram of a longitudinal sliding table, a lifting platform and a general support frame in the anti-void longitudinal withdrawal type belt mold grouting equipment for the secondary lining arch part of the tunnel;

FIG. 12 is a schematic view of the grouting pipe inserted into the anti-void longitudinal withdrawal pipe type belt mold grouting equipment for the secondary lining arch of the tunnel.

Detailed Description

For purposes of making the objects, aspects and advantages of the embodiments of the present application more apparent and complete description of the embodiments of the present application, reference is now made to FIG. 1 ~ 11 of the embodiments of the present application, which is illustrated in the accompanying drawings as a part of the embodiments of the present application and not in the entirety of the embodiments of the present application.

As shown in fig. 1, the anti-void longitudinal strip mold grouting pipe for the secondary lining of the tunnel comprises a rotary connecting pipe 70 and a plurality of extension pipes 71. The plurality of extension pipes 71 can be detachably connected end to form a long pipe, and the long pipe is prefabricated in the vault two liners. To prevent corrosion, the rotary connection pipe 70 and the extension pipe 71 are made of stainless steel. The rotary connection pipe 70 is detachably connected to one end of the extension pipe 71.

Specifically, as shown in fig. 2, the rotary connection pipe 70 includes a connection pipe body 700. The connector body 700 is a stainless steel tube. One end of the connecting pipe body 700 is provided with a rotating pipe quick connector 701, and the rotating pipe quick connector 701 is a common F-shaped stainless steel quick connector and can be quickly connected with an external connector. The inner wall of the other end of the connecting pipe body 700 is provided with a connecting internal thread 703. The connecting female screw 703 is for interconnecting and communicating with the extension pipe 71. In addition, since the grout pipe 7 needs to be continuously rotated to prevent the concrete from being solidified, a grip part 702 is fixedly provided on the outer circumference of the connecting pipe body 700 in order to increase a grip force at the time of rotation.

As shown in fig. 3, the extension pipe 71 includes an extension pipe body 710, and the extension pipe body 710 is also a stainless steel pipe having the same size as the above-mentioned connection pipe body 700 but having a long length. One end of the extension pipe body 710 is provided with a connection external thread 712, the connection external thread 712 and the connection internal thread 703 are matched and corresponding to each other, and 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 pipe body 710 is provided with an extension pipe internal thread 713, and the extension pipe internal thread 713 has the same structure as the connection internal thread 703 and can be matched and connected with the connection external thread 712 on the other extension pipe 71.

It should be noted that the connection mode of the two pipes is not limited to the threaded connection, and a snap connection mode, a sleeve connection mode, etc. may be adopted, as long as the two pipes can be connected and the torque can be transmitted, which all fall into the scope of the present invention.

Considering that the grouting pipe 7 affects grouting due to overlong length in the outward moving process, an extension pipe quick connector 711 is fixedly arranged at the outer end part of the connecting external thread 712, so that the extension pipe can be detached after the whole extension pipe 71 is pulled out, and the next extension pipe is used for grouting the two lining arch tops, thereby greatly facilitating the operation of operators. It should be noted that the extension tube quick connector 711 is identical in structure to the swivel tube quick connector 701, so that it can be arbitrarily combined to a desired length to suit the field situation.

The holding portion 702 has a polygonal column structure, and the polygonal column structure is preferably a regular hexagon in this embodiment. The torque can be well transmitted by matching with a corresponding clamping mechanism.

Meanwhile, it should be noted that the rotating pipe quick connector 701 and the extension pipe quick connector 711 are F-type quick connectors. So that the respective functions can be arbitrarily combined without being affected.

In order to clearly illustrate the use process of the tunnel secondary lining anti-stripping longitudinal strip mold grouting pipe, another tunnel secondary lining arch anti-stripping longitudinal strip mold grouting device invented by the inventor needs to be matched for description.

As shown in FIG. 4 ~ 12, the anti-void longitudinal withdrawal pipe type strip mold grouting equipment for the secondary lining arch part of the tunnel comprises a base 1, a rotating mechanism 2 and a pipe drawing mechanism 3.

The rotating mechanism 2 and the tube drawing mechanism 3 are respectively fixed on the base 1, and the centers of the rotating mechanism and the tube drawing mechanism are positioned on the same straight line. The turning mechanism 2 comprises a rotating means 20 and a first clamping means 21. Wherein, the rotating device 20 is a hollow structure, and a grouting pipe 7 can be arranged in the hollow structure in a penetrating way. The rotating device 20 can be made of a rotary speed reducer or a swing hydraulic cylinder. The rotating part of the rotating device 20 is fixedly connected with 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 may be a clamping mechanism commonly used in machine tools, or may be other clamping means as long as the clamping or releasing of the grouting pipe 7 can be conveniently realized.

The tube drawing mechanism 3 comprises a second clamping device 30, a linear motion mechanism 31 and a tube drawing connecting frame 32. The base 1 is fixedly provided with a linear motion mechanism 31, and the linear motion mechanism 31 can be a linear hydraulic cylinder, a linear air cylinder or a linear electric cylinder, a screw rod transmission mechanism and the like as long as linear reciprocating motion can be realized. The moving part of the linear motion mechanism 31 is fixedly connected with the tube drawing connecting frame 32, and one side of the tube drawing connecting frame 32 is fixedly connected with the second clamping device 30. The second clamping device 30 is similar in construction to the first clamping device 21 and may be used interchangeably or alternatively.

In order to make the structure more compact and the stress more reasonable, the base 1 comprises a bottom plate 10, a rotating mechanism fixing table 11, a gantry 13 and a supporting arm 14. A rotating mechanism fixing table 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 table 11. The swivel mechanism mounting block 11 is in the form of an inverted U-shaped structure for the purpose of raising the swivel mechanism 20. The concrete structure can be formed by welding channel steel or plates.

The other end of the bottom plate 10 is fixedly provided with a door frame 13, and the door frame 13 is perpendicular to the bottom plate 10. The gantry 13 is in an arch-shaped structure, and two sides of one surface of the gantry 13, which is close to the rotating device 20, are respectively fixedly provided with a linear motion mechanism 31 by screws. Two supporting arms 14 are respectively fixedly arranged on two sides of the other side of the door frame 13 far away from the rotating device 20, and the supporting arms 14 are vertically arranged on the door frame 13. In order to make the structure more firm, a rib 15 is fixedly arranged between the supporting arm 14 and the door frame 13.

The pipe drawing connecting frame 32 comprises a guide rail 320, a sliding block 321, a support connecting beam 322 and a support connecting flange 323.

The guide rails 320 are square guide rails, which are respectively fixed to the support arms 14 by screws. The slider 321 is slidably disposed on the guide rail 320.

The support connecting beam 322 is an L-shaped structure, and the bottom thereof is fixed on the slider 321 by screws. A support connecting flange 323 is fixedly arranged 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 with the support connecting beam 322, and the support connecting beam 322 and the slider 321 can be driven to slide back and forth along the guide rail 320 by the back and forth movement of the moving part of the linear motion mechanism 31. The support connection flange 323 is fixedly connected to the second clamping device 30.

In addition, the bottom plate 10 is further provided with a hollow groove 12, the hollow groove 12 can reduce the weight, and the first clamping device 21 can interfere with the bottom plate due to height problems when rotating.

In order to simplify the structure and reduce the cost, the rotating device 20 is a swing hydraulic cylinder with a flange, and the swing angle of the hydraulic cylinder is 60 degrees. The first clamping device 21 comprises a pipe rotating flange 210, a pipe rotating fixing semi-cylinder 211, a pipe rotating slide bar fixing lug 212, a pipe rotating slide bar 213, a pipe rotating movable semi-cylinder 214 and a clamping cylinder 215. Wherein, the rotating pipe flange 210 is a disc structure, a through hole is arranged at the center for penetrating the grouting pipe 7, and a rotating pipe fixing semi-cylinder 211 is fixedly arranged on one side of the rotating pipe flange 210 along the circle center. The rotating pipe fixing semicylinder 211 is a semicylinder structure, a polygonal through hole is axially formed in the central shaft of the rotating pipe fixing semicylinder, and the through hole serves as a clamping opening for clamping the grouting pipe 7. Two sides of the rotating pipe fixing semi-cylinder 211 are respectively and fixedly provided with a rotating pipe sliding rod fixing lug 212. The tube slide bar fixing lug 212 is a vertically arranged sleeve structure, and a tube slide bar 213 can be inserted and fixed in the sleeve structure.

The rotating pipe movable semi-cylinder 214 is also a semi-cylinder structure, and a clamping opening is formed in the center of the rotating pipe movable semi-cylinder and corresponds to the rotating pipe fixed semi-cylinder 211, but the rotating pipe movable semi-cylinder is not fixed on the rotating pipe flange 210. A rotating pipe sliding sleeve 2140 is vertically and fixedly arranged on both sides of the rotating pipe movable semi-cylinder 214, and the rotating pipe movable semi-cylinder 214 and the rotating pipe fixed semi-cylinder 211 are correspondingly matched with each other.

The clamping cylinder 215 is a linear moving cylinder, such as a hydraulic cylinder, an air cylinder or an electric cylinder, and two sides of the cylinder body are respectively and fixedly provided with a rotating pipe sliding rod 213, and the rotating pipe sliding rod 213 is arranged in the rotating pipe sliding sleeve 2140 and the rotating pipe sliding rod fixing lug 212 in a penetrating manner.

The bottom of the rotating pipe movable semi-cylinder 214 is fixedly connected with one end of a piston rod 2150 of the clamping cylinder 215, and the rotating pipe movable semi-cylinder 214 can be driven to slide up and down along the rotating pipe sliding rod 213 through the extension and retraction of the piston rod 2150. The rotating portion of the rotating device 20 is fixedly connected to the pipe transfer flange 210.

In order to further simplify the structure and reduce the cost, the linear motion mechanism 31 employs a linear hydraulic cylinder for easy procurement and assembly.

The second clamping device 30 comprises a pipe drawing flange plate 300, a pipe drawing fixing semi-cylinder 301, a pipe drawing slide bar fixing lug 303, a pipe drawing slide bar 304, a pipe drawing movable semi-cylinder 305 and a pipe drawing clamping cylinder 306. The tube drawing flange 300 is a disc-shaped structure, and a through hole is formed in the center of the tube drawing flange for penetrating through the grouting tube 7. A tube drawing fixing semi-cylinder 301 is fixedly arranged on one side of the tube drawing flange 300, tube drawing slide bar fixing lugs 303 are respectively and fixedly arranged on two sides of the tube drawing fixing semi-cylinder 301, and a tube drawing slide bar 304 is fixedly arranged in the tube drawing slide bar fixing lugs 303 in a penetrating manner. The pipe drawing sliding rod 304 is also provided with a pipe drawing movable semi-cylinder 305 in a sliding way. The bottom of the tube drawing slide bar 304 is fixedly connected with a tube drawing clamping cylinder 306. The piston rod 3060 of the tube drawing clamping cylinder 306 is fixedly connected with the bottom of the tube drawing movable semi-cylinder 305. As can be seen from the above and the drawings, the structure of the second clamping device 30 is very close to that of the first clamping device 21, but the shape of the nip is not exactly the same, as can be seen from fig. 8, the nip of the second clamping device 30 has a square structure, and as can be seen from fig. 5, the nip of the first clamping device 21 has a hexagonal structure. Such a design can effectively prevent the grouting pipe 7 from not being separated from the clamping opening due to the same structure.

In addition, in order to further ensure that the grouting pipe 7 is not easy to loosen after the first clamping device 21 and the second clamping device 30 are clamped, the central through hole of the pipe drawing flange 300 and the central through hole of the pipe rotating flange 210 are not on the same axis, that is, 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 are staggered from each other in a horizontal position by a certain distance, such as 1 ~ 3 cm, so that the grouting pipe 7 can be pulled out of the clamping openings by means of the staggered force.

Because the device is comparatively heavy and inconvenient to adjust, in order to solve the problem, the longitudinal sliding table 4 is further included, and the longitudinal sliding table 4 comprises a sliding table guide rail 40, a sliding table sliding block 41, a sliding table base 42, a sliding table bearing seat 43, a sliding table screw rod 45 and a sliding table turntable 46. Two sliding table guide rails 40 are fixedly arranged on the sliding table base 42 in parallel.

The two sliding table guide rails 40 are respectively provided with a sliding table sliding block 41 in a sliding manner, and the bottom plate 10 is fixedly connected with the sliding table sliding block 41. One side of the sliding table base 42 is fixedly provided with a sliding table bearing seat 43, a bearing is arranged in the sliding table bearing seat, and a sliding table screw rod 45 is rotatably arranged in the bearing in a penetrating manner. One end of the sliding table screw rod 45 is rotatably connected with the bottom of the bottom plate 10, and the other end of the sliding table screw rod 45 is fixedly connected with the sliding table turntable 46.

In addition, the lifting platform 5 is further included, and the lifting platform 5 includes a lifting platform base 50, a lifting platform sliding sleeve 51, a lifting platform sliding rod 52, a lifting platform screw 53 and a lifting platform turntable 54. A plurality of lifting platform sliding sleeves 51 are fixedly arranged on the lifting platform base 50, a lifting platform sliding rod 52 is slidably arranged in the lifting platform sliding sleeves 51 in a penetrating manner, and the top of the lifting platform sliding rod 52 is fixedly connected with the bottom of the sliding table base 42. The bottom of the sliding table base 42 is rotatably connected with a lifting platform screw rod 53, the lifting platform screw rod 53 is arranged in the lifting platform base 50 in a penetrating mode, a lifting platform turntable 54 is further arranged on the lifting platform base 50 in a rotating mode, a threaded hole is formed in the center of the lifting platform turntable 54 and matched with the lifting platform screw rod 53, and the lifting platform screw rod 53 is arranged in the threaded hole of the lifting platform turntable 54 in a penetrating mode.

The general support frame 6 is further included, and the general support frame 6 comprises a top plate 60 and support legs 61. Four supporting legs 61 are fixedly arranged at four corners of the bottom of the top plate 60. The lifting platform base 50 is fixedly arranged on the top plate 60, a sliding rod hole 600 is formed in the top plate 60, and the lifting platform sliding rod 52 can be arranged in the sliding rod hole 600 in a penetrating manner.

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

In addition, the grouting device also comprises a control system and a grouting device. The control system comprises a controller, an electromagnetic valve, a contactor or a frequency converter. The grouting device comprises a grouting pump, a grouting hose and a pressure gauge, wherein the inlet and the outlet of the grouting pump are respectively connected with the grouting hose, and the grouting hose at the outlet of the grouting pump is connected with the outer end of a grouting pipe embedded in the arch top of the second liner; the pressure gauge is used for detecting the pressure in the grouting pipe. The output end of the controller is respectively connected with the electromagnetic valve and the contactor, and the electromagnetic valve is used for controlling the actions of the linear motion mechanism and the clamping device. The contactor or the frequency converter is used for controlling the grouting pump. In order to facilitate external control, the controller is also connected with a control button or a communication module and used for receiving an external control command. The communication module comprises a wireless communication module or a wired communication module, and remote control can be realized. Because such a control system is relatively simple and is a common sequential control mode, for example, the control can be realized by using a PLC (programmable logic controller) or a single chip microcomputer, and the grouting mechanism is also the prior art, too much description is not given here.

During operation, the tunnel secondary lining arch anti-empty longitudinal pipe withdrawing type belt mold grouting equipment shown in fig. 1 is conveyed and moved to a trolley, and the height of the sliding table 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 rotates reversely relatively, the lifting platform screw 53 ascends, the sliding table base 42 also ascends, and otherwise, the lifting platform turntable descends. When the sliding table turntable 46 is rotated, the sliding table screw rod 45 is driven to rotate, and the sliding table screw rod 45 drives the bottom plate 10 to longitudinally move along the sliding table guide rail 40, so that the left and right adjustment is realized. The mechanisms are mature technologies and can be directly applied or used for reference.

After the rotating mechanism 2 is adjusted to the grouting pipe 7 pre-buried in the arch top of the two liners by using the lifting platform 5 and the longitudinal sliding table 4, the grouting pipe 7 is inserted into the rotating mechanism 2 and the pipe drawing mechanism 3 and extends out of the tail part of the pipe drawing mechanism 3, as shown in fig. 12, the structure of a tunnel is omitted in the drawing. The end part of the grouting pipe 7 is sleeved with a hose connected with cement paste, and the end part of the hose is correspondingly provided with a joint matched with the F-shaped connector, so that quick connection can be realized. It is to be noted here that the first clamping device 21 should clamp onto the clamping portion (702) in order to better transmit the torque.

After the installation, starting a control system, wherein the control system firstly controls a swing hydraulic cylinder serving as a rotating device 20 to restore the original position, namely the first clamping device 21 is vertical to the ground; then the clamping cylinder 215 in the first clamping device 21 is controlled to push out the piston rod 2150, so as to drive the rotating pipe movable semi-cylinder 214 to move upwards and clamp the clamping part (702) on the grouting pipe 7. At this time, the tube drawing mechanism 3 does not operate and is in a released state. After the first clamping device 21 clamps the clamping part (702) on the grouting pipe 7, the rotating device 20 drives the first clamping device 21 and the clamping part (702) on the grouting pipe 7 to rotate by an angle of 60 degrees; next, the clamping cylinder 215 is controlled to retract the piston rod 2150 thereof, thereby releasing the grip (702) on the grout pipe 7; after loosening, the rotating device 20 rotates reversely by an angle of 60 degrees and returns to the original state; then, the clamping cylinder 215 in the first clamping device 21 is controlled to push out the piston rod 2150, so as to drive the rotating pipe movable semi-cylinder 214 to move upwards and clamp the grouting pipe 7; the rotating device 20 then drives the first clamping device 21 and the grouting pipe 7 to rotate by an angle of 60 °. In this way, the rotation of the grouting pipe 7 can be continuously achieved. The rotating mechanism 2 needs to cooperate 6 times per rotation of the grouting pipe 7. Such a design can avoid a malfunction due to a winding of the pipe connected to the clamping cylinder 215. By the above-described rotation, the problem that the concrete is solidified to firmly fix the grout pipe 7 can be prevented.

When the concrete of the second liner reaches a certain hardness, cement slurry is injected into the vault cavity. At this time, the control system first stops the turning operation of the turning mechanism 2 and controls the first clamp device 21 to be released. Then, the tube drawing clamping cylinder 306 on the second clamping device 30 is controlled to extend the piston rod 3060 thereof, so as to drive the tube drawing movable semi-cylinder 305 to clamp the grouting tube 7; after clamping, the linear motion mechanism 31 is controlled to move outwards, i.e. the piston rod of the hydraulic cylinder extends outwards. In the process of extending, the grouting pipe 7 can be driven to be pulled out for a certain distance. After the pulling-out action is finished, the control system controls the grouting pump to pump cement slurry into the grouting pipe 7 from the hose, and therefore grouting in one step is achieved. In the grouting process, whether the grouting is completed or not can be judged through the pressure on the pipeline, and after the grouting is completed, the grouting at the stage can be stopped, and the next grouting period is started. After the grouting is full, the control system controls the grouting pump to stop working, and then the actions are repeated again: controlling a tube drawing clamping cylinder 306 on the second clamping device 30 to extend a piston rod 3060 of the tube drawing clamping cylinder to drive the tube drawing movable semi-cylinder 305 to clamp the grouting tube 7; after clamping, the linear motion mechanism 31 is controlled to move outwards, i.e. the piston rod of the hydraulic cylinder extends outwards. In the process of extending, the grouting pipe 7 can be driven to be pulled out for a certain distance. After the pulling-out action is finished, the control system controls the grouting pump to pump cement slurry into the grouting pipe 7 from the hose. The grouting work can be completed at a little by a little after the steps are repeated. Due to the adoption of hydraulic clamping and tube drawing, the workload of operators is greatly reduced.

In the grouting and pipe drawing processes, if one extension pipe (71) is drawn out, the two adjacent extension pipes (71) can be separated from each other by reversely rotating the extension pipes (71) or the connecting pipe (70), and then the joint of the grouting hose is connected with the extension pipe quick connector (711) of the next extension pipe (71), so that the length of the grouting pipe 7 outside can be ensured not to be too long, and the grouting operation is not influenced.

Claims (7)

1. A tunnel secondary lining anti-hollow longitudinal strip mold grouting pipe is characterized by comprising a rotary connecting pipe (70) and a plurality of extension pipes (71);

the plurality of extension pipes (71) can be detachably connected end to form a long pipe, and the long pipe is prefabricated in the second vault lining;

the rotary connecting pipe (70) is detachably connected with one end of the extension pipe (71).

2. The anti-void longitudinal strip mold grouting pipe for the secondary lining of the tunnel according to claim 1, characterized in that:

the rotary connection pipe (70) includes a connection 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 part (702) is fixedly arranged on the periphery of the connecting pipe body (700);

the extension pipe (71) comprises an extension pipe body (710), one end of the extension pipe body (710) is provided with a connecting external thread (712), and the connecting external thread (712) is matched and corresponds to the connecting internal thread (703);

the inner wall of the other end of the extension pipe body (710) is provided with extension pipe internal threads (713), and the extension pipe internal threads (713) have the same structure as the connection internal threads (703) and can be connected with the connection external threads (712) on the other extension pipe (71) in a matched mode.

3. The anti-void longitudinal strip mold grouting pipe for the secondary lining of the tunnel according to claim 2, characterized in that:

the outer end part of the connecting external thread (712) is also fixedly provided with an extension pipe quick connector (711);

the structure of the extension pipe quick connector (711) is the same as that of the rotating pipe quick connector (701).

4. The anti-void longitudinal strip mold grouting pipe for the secondary lining of the tunnel according to claim 2, characterized in that:

the clamping part (702) is of a polygonal column structure.

5. The anti-void longitudinal strip mold grouting pipe for the secondary lining of the tunnel according to claim 4, characterized in that:

the polygonal column structure is a regular hexagon.

6. The tunnel secondary lining anti-run-out longitudinal strip mold grouting pipe of claim 2 or 3, characterized in that:

the rotating pipe quick connector (701) and the extension pipe quick connector (711) are F-shaped quick connectors.

7. The anti-run-out longitudinal strip mold grouting pipe for the secondary lining of a tunnel according to any one of claims 1 ~ 5, wherein:

the rotary connecting pipe (70) and the extension pipe (71) are both made of stainless steel materials.