An advanced guide pipe driving device for loess stratum and its construction technology

Abstract

The present application relates to an advanced guide pipe driving device for loess strata and its construction technology, belonging to the technical field of tunnel construction. It includes a base, a drilling assembly and a grouting assembly; the drilling assembly is arranged above the base. The drilling assembly includes a drill barrel and an installation barrel. The drill barrel is coaxially rotatably connected outside the installation barrel. A cone bit is provided at one end of the drill barrel away from the base. One end of the drill barrel close to the base is rotatably connected to the base. A driving member is provided at one end of the drill barrel close to the base. A closing member is arranged inside one end of the installation barrel away from the base. The closing member includes an installation ring, a rotating ring and a plurality of closing blades. The installation ring is connected to the inner side wall of the installation barrel. The rotating ring is rotatably connected inside the installation barrel. The plurality of closing blades are located between the installation ring and the rotating ring and can close the opening of the installation ring. The grouting assembly includes a grouting pipe and a grouting machine. One end of the grouting pipe penetrates through the installation ring, and the other end extends to one end of the installation barrel close to the base. The present application has the effect of improving the coaxiality between the grouting guide pipe and the drill hole.

Description

Technical Field

[0001] This application relates to the technical field of tunnel construction, and in particular to a device for driving advanced ducts in loess strata and its construction technology. Background Art

[0002] The advanced small duct is a technological method in the tunneling construction process of tunnel engineering, mainly used for pre-support in soft and broken zones with short self-stabilization time, shallow buried sections, portal bias sections, sand layers, sand and pebble layers, fault fracture zones and other sections.

[0003] Chinese invention patent with publication number CN112012749A discloses a tunnel advanced grouting small duct and construction method, including a pipe head and a pipe body. The pipe head and the pipe body are integrally arranged. A pressurizing component is arranged at one end of the pipe body far from the pipe head. The pressurizing component includes a plug, a connecting rod, a push plate and a feed pipe. The plug is located inside the pipe body. One end of the connecting rod is fixedly connected to the side wall of the plug far from the pipe head. The length direction of the connecting rod is parallel to the length direction of the pipe body. The other end of the connecting rod is fixedly connected to the push plate. The feed pipe is fixedly connected to the end of the push plate far from the connecting rod. Through holes are formed on the side walls of the push plate and the plug where they are connected to the connecting rod. Through holes are also arranged along the length direction of the connecting rod. The through holes penetrate through the inside of the connecting rod. The through holes are connected to each other. The feed pipe is communicated with the pipe body through the through holes.

[0004] Regarding the above related technologies, the inventor believes that before inserting the pipe head into the tunnel in the above patent, it is necessary to drill holes on the periphery of the tunnel. After drilling, the pipe head is inserted into the pipe body towards the hole and the pipe body is grouted. The coaxiality between the axis of the grouted pipe body and the drill hole is poor, and the thickness of the concrete wrapped around the periphery of the pipe body is different, resulting in poor stability of the formed grouting duct. Summary of the Invention

[0005] In order to improve the coaxiality between the grouting duct and the drill hole, this application provides a device for driving advanced ducts in loess strata and its construction technology.

[0006] In a first aspect, a device for driving advanced ducts in loess strata provided by this application adopts the following technical solution:

[0007] A device for driving an advanced guide pipe in loess stratum, comprising a base, a drilling assembly and a grouting assembly; a moving member is provided below the base; the drilling assembly is arranged above the base, and the drilling assembly includes a drill barrel and an installation barrel. Both the drill barrel and the installation barrel are horizontally arranged. The drill barrel is coaxially and rotatably connected outside the installation barrel. A cone bit is provided at one end of the drill barrel away from the base. One end of the drill barrel close to the base is rotatably connected to the base. A driving member is provided at one end of the drill barrel close to the base, and the driving member is used to drive the drill barrel to rotate. A closing member is arranged inside one end of the installation barrel away from the base. The closing member includes an installation ring, a rotating ring and a plurality of closing blades. The peripheral side of the installation ring is fixedly connected to the inner side wall of the installation barrel. The rotating ring is rotatably connected inside the installation barrel. The rotating ring is located at one end of the installation ring close to the base. The plurality of closing blades are located between the installation ring and the rotating ring. The closing blades are slidably connected to both the installation ring and the ends of the rotating ring close to the closing blades. A rotating cylinder is provided at one end of the rotating ring away from the closing blades, and the rotating cylinder is used to rotate the rotating ring. The rotating ring is used to drive the plurality of closing blades to slide along the installation ring. The plurality of closing blades can close the opening of the installation ring. The installation ring, the rotating ring and the installation barrel are coaxially arranged. A reinforcing rod is placed at one end of the rotating ring away from the installation ring. The diameter of the reinforcing rod is equal to or smaller than the ring opening of the installation ring; the grouting assembly includes a grouting pipe and a grouting machine. One end of the grouting pipe penetrates through the installation ring, and the other end extends to one end of the installation barrel close to the base. A relief through hole is opened at one end of the rotating cylinder close to the installation ring, and the relief through hole is used to make way for the grouting pipe. The grouting machine is communicated with the end of the grouting pipe extending out of the installation barrel.

[0008] By adopting the above technical solution, when reinforcing a tunnel, the drill barrel is directed towards the end of the tunnel, the reinforcing rod is placed inside the rotating cylinder, the driving member is started, and the driving member drives the drill barrel to drill the loess stratum on the periphery of the tunnel. When drilling, the plurality of closing blades are in a closed state. When the drilling depth is the same as the length of the reinforcing rod, the rotating cylinder is rotated, the rotating cylinder drives the rotating ring to rotate, and the plurality of closing blades are driven by the rotating ring to slide along the installation ring and the rotating ring, so that the plurality of closing blades are in an open state. The reinforcing rod is pressed, the drill barrel, the installation barrel and the rotating cylinder are withdrawn, and the reinforcing rod is left in the drill hole. While withdrawing the drill barrel, the installation barrel and the rotating cylinder, the grouting machine is started, and the concrete slurry enters the drill hole through the grouting pipe, and the reinforcing rod is cast in the drill hole to improve the coaxiality of the grouting guide pipe and the drill hole.

[0009] Optionally, an installation through-hole is provided at the center of the installation ring. The installation through-hole is a regular hexagon. Installation sliding grooves are provided at the length of each side of the installation through-hole close to it. The length of the installation sliding groove is greater than the side length of the installation through-hole. The six installation sliding grooves are in a spiral shape as a whole, and the spiral direction is the same as the rotation direction when opening the closing blade. One end of the closing blade close to the installation sliding groove is provided with a sliding strip. The sliding strip is located in the installation sliding groove and can slide along the installation sliding groove. One end of the closing blade far from the installation sliding groove is provided with a guiding column. Guiding grooves are provided at the position of the rotating ring close to the guiding column. The guiding column is located in the guiding groove and can slide along the guiding groove. The guiding column can approach or move away from the axis of the installation ring. There are six closing blades. The closing blade is a trapezoidal piece with an inner angle of 60 degrees, and the end with an inner angle of 60 degrees faces the axis of the installation ring. One long side of the closing blade far from the 60-degree inner angle is an arc-shaped side. The closing blade can close the installation through-hole.

[0010] By adopting the above technical solution, when the rotating cylinder drives the rotating ring to rotate, the installation ring is in a fixed state, and the six closing blades rotate clockwise or counterclockwise at the same time, so as to open or close the installation through-hole. When the closing blade is in the open state, the guiding column is located at one end of the guiding groove far from the axis of the installation ring, and the sliding strip is located at one end of the installation sliding groove extending out of the side length of the installation through-hole.

[0011] Optionally, the rotating cylinder is hollow, a placement cavity is formed between the rotating cylinders, the grouting pipe is located in the placement cavity, and a plurality of rotating plates are provided at the opening of the rotating cylinder far from the closing member. The rotating plates straddle the placement cavity and are connected to the rotating cylinder.

[0012] By adopting the above technical solution, the placement cavity is convenient for installing the grouting pipe. When rotating the rotating cylinder, just hold the rotating plate, which is convenient for rotating the rotating cylinder.

[0013] Optionally, one end of the grouting pipe extending out of the installation ring is communicated with a grouting ring, and a plurality of grouting ports are circumferentially provided at one end of the grouting ring far from the grouting pipe.

[0014] By adopting the above technical solution, it is convenient to grout between the drill hole and the reinforcement rod, and the grouting efficiency is improved.

[0015] Optionally, at least one limiting bearing is provided between the installation cylinder and the drill cylinder.

[0016] By adopting the above technical solution, the friction between the drill cylinder and the installation cylinder is reduced, and the service life of the drill cylinder and the installation cylinder is improved.

[0017] Optionally, a lifting member is provided between the base and the drill tube. A placement table is provided between the lifting member and the drill tube. An installation table is provided between the placement table and the drill tube. A sliding groove is formed in the placement table. One end of the installation table close to the placement table is provided with a sliding block. The sliding block is located in the sliding groove and can slide along the sliding groove. The sliding direction of the sliding block is horizontal to the axis of the drill tube. One end of the drill tube away from the closing member is rotatably connected to the installation table. One end of the driving member is connected to the drill tube, and the other end is connected to the installation table.

[0018] By adopting the above technical solution, when drilling, the installation table is pushed, so as to push the drill tube. The lifting table can adjust the height of the drill tube, which is convenient for the operator to drill, put in the reinforcement rod and pour the casting.

[0019] Optionally, the driving member includes a gear ring, a gear and a driving motor. The gear ring is sleeved on one end of the drill tube away from the closing member and is fixedly connected. The gear is located on one side of the gear ring and meshes with the gear ring. The driving motor is coaxially connected to the gear. One end of the driving motor away from the gear is connected to the installation table.

[0020] By adopting the above technical solution, when drilling, the driving motor is started. The driving motor drives the gear to rotate. The gear drives the gear ring to rotate. While the gear ring rotates, the drill rod rotates, and the roller cone drills the end of the tunnel.

[0021] Optionally, at least one placement groove is formed in one end of the drill tube close to the closing member. A scraping block is provided in the placement groove. One end of the scraping block is rotatably connected in the placement groove, and the other end can be retracted into the placement groove. One end of the scraping block away from its rotating end is connected with a pull rope. The pull rope penetrates through the drill tube along the axis direction of the drill tube and extends out of one end of the drill tube away from the scraping block.

[0022] By adopting the above technical solution, when the drill tube is pulled out, the pull rope is pulled, so that one end of the scraping block away from its rotating end extends out of the placement groove, and grooves are scraped on the inner side wall of the drill hole. When pouring the concrete slurry, the concrete slurry fills into the grooves, increasing the stability of the concrete slurry in the drill hole and further improving the stability of the reinforcement rod in the drill hole.

[0023] Optionally, a plurality of reinforcement grooves are formed on the outer peripheral side of the reinforcement rod.

[0024] By adopting the above technical solution, when pouring the concrete slurry, it flows into the reinforcement grooves, increasing the friction between the concrete slurry and the reinforcement rod and further strengthening the reinforcement rod.

[0025] On the other hand, the present application also provides a construction process applicable to a device for driving an advanced guide pipe in the loess stratum as described above.

[0026] A construction process for driving an advanced guide pipe in the loess stratum, and its construction steps are as follows:

[0027] S1. After marking the positions where the reinforcement rods need to be driven in, push the driving device to the tunnel section, and use the lifting member to adjust the height of the drilling cylinder so that the end of the drilling cylinder with the rock bits abuts against the tunnel section;

[0028] S2. Rotate the rotating cylinder. After the plurality of closing blades are in the closed state, insert the reinforcement rods;

[0029] S3. Push the reinforcement rods and the mounting table to drill the tunnel;

[0030] S4. Rotate the rotating cylinder to open the plurality of closing blades, push the reinforcement rods so that the end of the reinforcement rod close to the bottom wall of the drill hole abuts against the bottom wall of the drill hole, and at the same time, withdraw the drilling cylinder and perform grouting;

[0031] S41. Before grouting, pull the scraping block to the unfolded state. The scraping block scrapes grooves on the inner wall of the drill hole, and fills the grooves while grouting;

[0032] S5. Completely withdraw the drilling cylinder, level the pouring surface, drill and cast on the other side of the tunnel again, and perform operations after the concrete slurry on the same side has solidified to a certain extent.

[0033] By adopting the above technical solution, the reinforcement rods are brought into the drill holes during drilling, and after the drilling is completed, while withdrawing the drilling cylinder, the space between the reinforcement rods and the drill holes is cast, improving the coaxiality of the reinforcement rods and the drill holes, thereby improving the coaxiality of the grouting conduits and the drill holes.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. By placing the reinforcement rods into the drill holes together during drilling, withdrawing the drilling cylinder after the drilling is completed, and casting the space between the drill holes and the reinforcement rods while withdrawing the drilling cylinder, stabilizing the reinforcement rods during casting until the drilling cylinder is completely withdrawn from the drill holes and the concrete slurry is completely filled, thereby improving the coaxiality of the grouting conduits and the drill holes;

[0036] 2. By providing the scraping block, the scraping block is located in the placement groove during drilling. When the drilling cylinder is withdrawn, the scraping block extends out of the placement groove to scrape grooves on the inner side wall of the drill hole, improving the reinforcement strength between the concrete slurry and the drill hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of an advanced duct driving device for loess strata according to an embodiment of the present application.

[0038] Figure 2 is a partial structural schematic diagram of an advanced duct driving device for loess strata according to an embodiment of the present application.

[0039] Figure 3 is an exploded view of a closing member according to an embodiment of the present application.

[0040] Figure 4 It is an exploded view of the sealing member of the embodiment of the present application from another perspective.

[0041] Figure 5 It is a partial stereoscopic schematic diagram of an advance guide tube driving device for loess formations according to an embodiment of the present application.

[0042] Figure 6 It is a partial stereoscopic schematic diagram from another perspective of an advance guide tube driving device for loess formations according to an embodiment of the present application.

[0043] Figure 7 This is a partial structural diagram of an advance guide tube driving device for loess formations according to an embodiment of the present application.

[0044] Explanation of reference numerals: 1. base; 11. moving part; 12. placing table; 121. sliding groove; 13. mounting table; 131. sliding block; 2. drilling assembly; 21. drill barrel; 211. placing groove; 22. mounting barrel; 23. gear; 24. limit bearing; 25. driving part; 251. gear ring; 252. gear; 253. driving motor; 3. grouting assembly; 31. grouting pipe; 32. grouting machine; 3 3. Grouting ring; 34. Grouting port; 4. Lifting piece; 5. Closing piece; 51. Mounting ring; 511. Mounting hole; 512. Mounting slide; 52. Rotating ring; 521. Guide groove; 53. Closing blade; 531. Slide bar; 532. Guide column; 54. Rotating cylinder; 541. Clearance hole; 55. Rotating plate; 6. Reinforcement rod; 61. Reinforcement groove; 7. Scraper block; 71. Pull rope; 72. Limit handle. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-7 This application is described in further detail.

[0046] The embodiment of the present application discloses an advance guide tube driving device for loess formations.

[0047] Reference Figure 1 and Figure 2, A device for driving an advanced guide pipe into the loess stratum, comprising a base 1, a drilling assembly 2 and a grouting assembly 3; a moving member 11 is provided below the base 1, and the moving member 11 is used to move the base 1. The moving member 11 can be two fixed pulleys and two brake wheels or four brake wheels. In this embodiment, it is four brake wheels; the drilling assembly 2 is arranged above the base 1. The drilling assembly 2 includes a drill barrel 21 and a mounting barrel 22. Both the drill barrel 21 and the mounting barrel 22 are horizontally arranged. The drill barrel 21 is coaxially rotatably connected to the outside of the mounting barrel 22. A limiting bearing 24 can be arranged between the mounting barrel 22 and the drill barrel 21, or two limiting bearings 24 can be arranged. In this embodiment, two limiting bearings 24 are arranged. The two limiting bearings 24 are symmetrically arranged at both ends of the mounting barrel 22. The limiting bearing 24 is a ball bearing. The limiting bearing 24 facilitates the rotation of the drill barrel 21 along the outer peripheral side of the mounting barrel 22. A roller cone 23 is welded to one end of the drill barrel 21 away from the base 1. The roller cone 23 facilitates the drill barrel 21 to drill the tunnel section.

[0048] Refer to Figure 1 and Figure 2 , A lifting member 4 is fixedly connected between the base 1 and the drill barrel 21 by bolts. The lifting member 4 can be an oil cylinder or a jack. In this embodiment, it is a jack. The top of the lifting member 4 is also connected to a placement table 12 by bolts. The upper surface of the placement table 12 is slidably connected to a mounting table 13. Two sliding grooves 121 are symmetrically formed on the surface of the placement table 12 along the width direction of the placement table 12. The sliding grooves 121 are dovetail grooves. One end of the mounting table 13 close to the placement table 12 is welded with a sliding block 131. The sliding block 131 is a dovetail block. The sliding block 131 is located in the sliding groove 121 and can slide along the sliding groove 121. The sliding direction of the sliding block 131 is horizontal with the axis of the drill barrel 21.

[0049] Specifically, refer to Figure 1 and Figure 2 , The drill barrel 21 is connected to the mounting table 13 through a fixing seat. The drill barrel 21 is rotatably connected to the fixing seat on the mounting table 13 through a bearing. One end of the drill barrel 21 close to the base 1 is provided with a driving member 25. The driving member 25 is used to drive the drill barrel 21 to rotate. The driving member 25 includes a gear ring 251, a gear 252 and a driving motor 253. The gear ring 251 is sleeved and welded on the outer side wall of one end of the drill barrel 21 away from the closing member. The gear 252 is located on one side of the gear ring 251 and meshes with the gear ring 251. The driving motor 253 is coaxially connected to the gear 252. One end of the driving motor 253 away from the gear 252 is also connected to the mounting table 13 through a fixing seat. The driving motor 253 is a servo motor.

[0050] Furthermore, refer to Figure 2 , Figure 3 and Figure 4, a closing member 5 is provided inside one end of the installation cylinder 22 away from the base 1. The closing member 5 includes an installation ring 51, a rotating ring 52, and a plurality of closing blades 53. The installation ring 51, the rotating ring 52, and the installation cylinder 22 are all coaxially arranged. The circumferential side wall of the installation ring 51 is welded to the inner side wall of the installation cylinder 22. The rotating ring 52 is rotatably connected inside the installation cylinder 22. The rotating ring 52 is located at one end of the installation ring 51 close to the base 1. The plurality of closing blades 53 are located between the installation ring 51 and the rotating ring 52. The closing blades 53 are slidably connected to both the installation ring 51 and the ends of the rotating ring 52 close to the closing blades 53. A rotating cylinder 54 is welded to one end of the rotating ring 52 away from the closing blades 53. The rotating cylinder 54 is used to rotate the rotating ring 52. The rotating ring 52 is used to drive the six closing blades to rotate clockwise or counterclockwise simultaneously.

[0051] Refer to Figure 2 , Figure 3 and Figure 4 , an installation through hole 511 is opened at the center of the installation ring 51. The installation through hole 511 is a regular hexagon. Installation chutes 512 are opened at the side lengths close to each installation through hole 511. The length of the installation chutes 512 is greater than the side length of the installation through hole 511. Each installation chute 512 is parallel to the side length of the installation through hole 511 close to it. The six installation chutes 512 are circumferentially arrayed in a clockwise direction. That is to say, the six installation chutes 512 are in a spiral shape as a whole, and the spiral direction is the same as the rotation direction when opening the closing blades 53. A sliding bar 531 is welded to one end of the closing blade 53 close to the installation chute 512. The sliding bar 531 is located inside the installation chute 512 and can slide along the installation chute 512. A guiding column 532 is welded to one end of the closing blade 53 away from the installation chute 512. Guiding grooves 521 are opened at the positions of the rotating ring 52 close to the guiding column 532. The guiding column 532 is located inside the guiding grooves 521 and can slide along the guiding grooves 521. The guiding column 532 can approach or move away from the axis of the installation ring 51. There are six closing blades 53. The closing blades 53 are trapezoidal pieces with one inner angle of 60 degrees, and the ends with the 60-degree inner angle all face the axis of the installation ring 51. One long side of the closing blade 53 away from the 60-degree inner angle is an arc-shaped side. The closing blades 53 can close the installation through hole 511. The adjacent two blades are limited by a slider-chute method to further guide the closing blades 53 and improve the stability of the closing blades 53 during drilling.

[0052] Refer to Figure 5, a reinforcing rod 6 is placed at one end of the rotating ring 52 away from the mounting ring 51. The reinforcing rod 6 is inserted into the rotating cylinder 54. The diameter of the reinforcing rod 6 is equal to or smaller than the mounting through-hole 511, so that the reinforcing rod 6 can pass through the mounting through-hole 511. A plurality of reinforcing grooves 61 are formed on the outer peripheral side of the reinforcing rod 6; the grouting assembly 3 includes a grouting pipe 31 and a grouting machine 32. The grouting pipe 31 is a flexible pipe. One end of the grouting pipe 31 penetrates through the mounting ring 51, and the other end extends to one end of the mounting cylinder 22 close to the base 1. The grouting machine 32 is communicated with the end of the grouting pipe 31 extending out of the mounting cylinder 22. The rotating cylinder 54 is hollow. A placement cavity is formed between the rotating cylinders 54. The grouting pipe 31 is located in the placement cavity. A relief through-hole 541 is formed at one end of the rotating cylinder 54 close to the mounting ring 51. The relief through-hole 541 is used to provide relief for the grouting pipe 31. One end of the grouting pipe 31 extending out of the mounting ring 51 is communicated with a grouting ring 33. The grouting pipe 31 is welded to the grouting ring 33. The grouting ring 33 is welded to the surface of the mounting ring 51 away from the rotating ring 52 through fixation. A plurality of grouting ports 34 are circumferentially formed at one end of the grouting ring 33 away from the grouting pipe 31. The plurality of grouting ports 34 facilitate grouting into the drill hole and improve the grouting efficiency. A plurality of rotating plates 55 are provided at the opening of the rotating cylinder 54 away from the closing member. The rotating plates 55 span across the placement cavity and are connected to the rotating cylinder 54. Both ends of the rotating plate 55 are welded to the rotating cylinder 54.

[0053] Referring to Figure 6 and Figure 7 , at least one placement groove 211 is formed at one end of the drill cylinder 21 close to the closing member. The placement groove 211 can be one, two or three. In this embodiment, two placement grooves 211 are provided. The two placement grooves 211 are symmetrically arranged at one end of the drill cylinder 21 provided with the roller cutters 23. A scraping block 7 is arranged in the placement groove 211. One end of the scraping block 7 is rotatably connected in the placement groove 211 through a rotating shaft, and the other end can be retracted into the placement groove 211. A pulling rope 71 is tied to one end of the scraping block 7 away from its rotating end. The pulling rope 71 penetrates through the drill cylinder 21 along the axial direction of the drill cylinder 21 and extends out of one end of the drill cylinder 21 away from the scraping block 7. A limiting handle 72 is adhered to one end of the pulling rope 71 away from the scraping block 7. When pulling the pulling rope 71, hold the limiting handle 72 to pull.

[0054] The implementation principle of an advanced guide pipe driving device for loess strata in an embodiment of this application is as follows: While drilling, the reinforcement rod 6 is driven into the drill hole. After drilling, while the drill barrel 21 is withdrawn, concrete slurry is grouted. At the same time, the scraping block 7 scrapes grooves on the inner wall of the drill hole, and a reinforcement strip is formed between the concrete slurry and the grooves. The reinforcement groove 61 on the reinforcement rod 6 can also form a reinforcement strip, improving the strength between the reinforcement rod 6 and the concrete slurry. When the drill barrel 21 is withdrawn, the closure member is opened, and the closure member makes the installation through hole 511 in an open state. The operator pushes the reinforcement rod 6 so that one end of the reinforcement rod 6 located in the drill hole abuts against the loess stratum. While the drill barrel 21 is withdrawn, concrete slurry is cast, so that the thickness of the concrete cast on the periphery of the reinforcement rod 6 approaches the same, thereby improving the coaxiality of the grouting guide pipe and the drill hole.

[0055] In addition, this application also discloses the construction steps of a construction process for an advanced guide pipe driving in loess strata:

[0056] S1. After marking the position where the reinforcement rod 6 needs to be driven, push the driving device to the tunnel section, and use the lifting member 4 to adjust the height of the drill barrel 21 so that one end of the drill barrel 21 provided with the roller bits 23 abuts against the tunnel section.

[0057] S2. Rotate the rotating cylinder 54 so that the plurality of closing blades 53 are in a closed state and then insert the reinforcement rod 6. [[ID=IO]]

[0058] S3. Push the reinforcement rod 6 and the mounting table 13 to drill the tunnel.

[0059] S4. Rotate the rotating cylinder 54 to open the plurality of closing blades 53, push the reinforcement rod 6 so that one end of the reinforcement rod 6 close to the bottom wall of the drill hole abuts against the bottom wall of the drill hole, and at the same time withdraw the drill barrel 21 and perform grouting.

[0060] S41. Before grouting, pull the scraping block 7 to the unfolded state, and the scraping block 7 scrapes grooves on the inner wall of the drill hole, and fills the grooves while grouting.

[0061] S5. Completely withdraw the drill barrel 21, level the casting surface, drill and cast on the other side of the tunnel again, and wait until the concrete slurry on the same side has solidified to a certain extent before proceeding with the operation.

[0062] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An advanced guide pipe driving device for loess strata, characterized in that: It comprises a base (1), a drilling assembly (2) and a grouting assembly (3); A moving part (11) is provided below the base (1); A drilling assembly (2) is arranged above the base (1). The drilling assembly (2) includes a drill barrel (21) and a mounting barrel (22). The drill barrel (21) and the mounting barrel (22) are both arranged horizontally. The drill barrel (21) is coaxially rotatably connected to the outside of the mounting barrel (22). A gear wheel (23) is provided at one end of the drill barrel (21) away from the base (1). An end of the drill barrel (21) close to the base (1) is rotatably connected to the base (1). A driving member (25) is provided at one end of the drill barrel (21) close to the base (1). The driving member (25) is used to drive the drill barrel (21) to rotate. A closing member (5) is provided inside the end of the mounting barrel (22) away from the base (1). The closing member (5) includes a mounting ring (51), a rotating ring (52) and a plurality of closed blades (53). The circumferential side of the mounting ring (51) is fixedly connected to the inner side wall of the mounting barrel (22). The rotating ring (52) is rotatably connected to the inside of the mounting barrel (22). The rotating ring (52) is located at one end of the mounting ring (51) close to the base (1), and a plurality of closed blades (53) are located between the mounting ring (51) and the rotating ring (52). The closed blades (53) are all slidably connected to the mounting ring (51) and one end of the rotating ring (52) close to the closed blades (53). The end of the rotating ring (52) away from the closed blades (53) is provided with a rotating cylinder (54). The rotating cylinder (54) is used to rotate the rotating ring (52). The rotating ring (52) is used to drive the plurality of closed blades (53) to slide along the mounting ring (51). The plurality of closed blades (53) can close the opening of the mounting ring (51). The mounting ring (51), the rotating ring (52) and the mounting cylinder (22) are coaxially arranged. A reinforcing rod (6) is placed at one end of the rotating ring (52) away from the mounting ring (51). The diameter of the reinforcing rod (6) is equal to or smaller than the ring opening of the mounting ring (51). The grouting assembly (3) includes a grouting pipe (31) and a grouting machine (32), one end of the grouting pipe (31) passes through the mounting ring (51), and the other end extends to the end of the mounting cylinder (22) close to the base (1), and a clearance hole (541) is provided at the end of the rotating cylinder (54) close to the mounting ring (51), and the clearance hole (541) is used to make way for the grouting pipe (31), and the grouting machine (32) is connected to the end of the grouting pipe (31) extending from the mounting cylinder (22); A mounting through hole (511) is provided at the center of the mounting ring (51). The mounting through hole (511) is a regular hexagon. Mounting chutes (512) are provided at the sides near each side length of the mounting through hole (511). The length of the mounting chute (512) is greater than the side length of the mounting through hole (511). The six mounting chutes (512) are in a spiral shape as a whole, and the spiral direction is the same as the rotation direction when opening the closing blade (53). A slide bar (531) is provided at one end of the closing blade (53) close to the mounting chute (512). The slide bar (531) is located in the mounting chute (512) and can slide along the mounting chute (512). A guiding column (532) is provided at the end of the closing blade (53) away from the mounting chute (512). Guiding grooves (521) are provided at the positions of the rotating ring (52) close to the guiding column (532). The guiding column (532) is located in the guiding groove (521) and can slide along the guiding groove (521). The guiding column (532) can approach or move away from the axis of the mounting ring (51). There are six closing blades (53). The closing blade (53) is a trapezoidal sheet with an inner angle of 60 degrees, and the ends with an inner angle of 60 degrees all face the axis of the mounting ring (51). One long side of the closing blade (53) away from the 60-degree inner angle is an arc edge. The closing blade (53) can close the mounting through hole (511). The rotating cylinder (54) is provided with a hollow interior, and a placement cavity is formed inside the rotating cylinder (54). The grouting pipe (31) is located in the placement cavity. A plurality of rotating plates (55) are provided at the opening of the rotating cylinder (54) away from the closing member. The rotating plates (55) straddle the placement cavity and are connected to the rotating cylinder (54).

2. The advanced guide pipe driving device for loess stratum according to claim 1, characterized in that: One end of the grouting pipe (31) extending out of the mounting ring (51) is communicated with a grouting ring (33). A plurality of grouting ports (34) are circumferentially provided at one end of the grouting ring (33) away from the grouting pipe (31).

3. The advanced guide pipe driving device for loess stratum according to claim 1, characterized in that: At least one limiting bearing (24) is provided between the mounting cylinder (22) and the drilling cylinder (21).

4. A device for driving an advanced duct in loess stratum according to claim 1, characterized in that: A lifting member (4) is provided between the base (1) and the drilling cylinder (21). A placement table (12) is provided between the lifting member (4) and the drilling cylinder (21). An installation table (13) is provided between the placement table (12) and the drilling cylinder (21). A sliding groove (121) is provided on the placement table (12). A sliding block (131) is provided at one end of the installation table (13) close to the placement table (12). The sliding block (131) is located in the sliding groove (121) and can slide along the sliding groove (121). The sliding direction of the sliding block (131) is horizontal with respect to the axis of the drilling cylinder (21). One end of the drilling cylinder (21) away from the closing member (5) is rotatably connected to the installation table (13). One end of the driving member (25) is connected to the drilling cylinder (21), and the other end is connected to the installation table (13).

5. A device for driving an advanced guide pipe in a loess stratum according to claim 1, characterized in that: The driving member (25) includes a ring gear (251), a gear (252), and a driving motor (253). The ring gear (251) is sleeved on one end of the drill pipe (21) away from the closing member and is fixedly connected. The gear (252) is located on one side of the ring gear (251) and meshes with the ring gear (251). The driving motor (253) is coaxially connected to the gear (252), and one end of the driving motor (253) away from the gear (252) is connected to the mounting table (13).

6. The advanced guide pipe driving device for loess stratum according to claim 1, characterized in that: At least one placement groove (211) is formed at one end of the drill pipe (21) close to the closing member. A scraping block (7) is arranged in the placement groove (211). One end of the scraping block (7) is rotatably connected in the placement groove (211), and the other end can be retracted into the placement groove (211). A pulling rope (71) is connected to the end of the scraping block (7) away from its rotating end. The pulling rope (71) penetrates through the drill pipe (21) along the axial direction of the drill pipe (21) and extends out of one end of the drill pipe (21) away from the scraping block (7).

7. A device for driving an advanced conduit into the loess stratum according to claim 1, characterized in that: A plurality of reinforcing grooves (61) are formed on the outer peripheral side of the reinforcing rod (6).

8. A construction process for driving the advanced conduit in the loess stratum, which is used for a device for driving the advanced conduit in the loess stratum described in any one of claims 1-7 above, is characterized in that, The construction steps are as follows: S1. After marking the position where the reinforcing rod (6) needs to be driven in, push the driving device to the tunnel section, and use the lifting member (4) to adjust the height of the drill pipe (21) so that the end of the drill pipe (21) provided with the roller cutters (23) abuts against the tunnel section. S2. Rotate the rotating cylinder (54) to make the plurality of closing blades (53) in a closed state, and then insert the reinforcing rod (6). S3. Push the reinforcing rod (6) and the mounting table (13) to drill the tunnel. S4. Rotate the rotating cylinder (54) to open the plurality of closing blades (53), push the reinforcing rod (6) so that one end of the reinforcing rod (6) close to the bottom wall of the drill hole abuts against the bottom wall of the drill hole, and at the same time, withdraw the drill pipe (21) and perform grouting. S41. Before grouting, pull the scraping block (7) to the unfolded state, and the scraping block (7) scrapes grooves on the inner wall of the drill hole, and fills the grooves while grouting. S5. Completely withdraw the drill pipe (21), level the pouring surface, drill and pour on the other side of the tunnel again, and wait until the concrete slurry on the same side has solidified to a certain extent before proceeding with the operation.

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