Working device for water and mud bursting position of tunnel and treatment method

Abstract

The working device comprises a working platform and a magnetic drill rod type anchor rod, the working platform comprises a lifting frame, a bearing platform is arranged at the top of the lifting frame, a drill rod power source is arranged on the upper surface of the bearing platform in a sliding mode, and pulleys are arranged at the bottom end of the lifting frame; the working platform is arranged on the guide rail, the magnetic drill rod type anchor rod comprises a spiral anchoring head, a grouting drill rod is arranged at the tail end of the spiral anchoring head, a plurality of threaded magnetic sleeves are arranged on the grouting drill rod in a sleeving mode, and steel pipes are arranged outside the threaded magnetic sleeves. By providing an advanced curtain grouting construction method and a novel material, the problem of water burst and mud burst of the tunnel is solved; a magnetic drill rod method is provided to achieve accurate drilling, and the grouting efficiency is improved; and in combination with a specially-designed pipe shed structure, the construction efficiency and the supporting effect are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, in particular to a working device and a treatment method for water gushing and mud bursting in a tunnel. Background Art

[0002] In tunnel construction, pipe-roof support is an important measure to prevent ground subsidence and loosening of surrounding rock. Traditional pipe-roof support methods mostly use crawler-type pipe-roof drilling rigs for drilling and steel pipe installation, but there are problems such as limited drilling length, complex construction platform construction, and difficulty in ensuring drilling accuracy and grouting efficiency. Especially under complex geological conditions, these problems are particularly prominent, affecting construction progress and safety. In addition, tunnel construction with rich aquatic layers often encounters tunnel water gushing problems, which together with loose soil tunnel projects cause water gushing and mud bursting problems.

[0003] Therefore, it is urgently necessary to provide a working device and a treatment method for water and mud bursts in tunnels to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a working device and a treatment method for water and mud bursts in tunnels to solve the problems raised in the background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a working device for use in water and mud bursting places in tunnels, comprising a working platform and a magnetic drill rod type anchor rod, the working platform comprising a lifting frame, a bearing platform is provided on the top of the lifting frame, a drill rod power source is slidably provided on the upper surface of the bearing platform, a pulley is provided at the bottom end of the lifting frame, the working platform is arranged on a guide rail, the magnetic drill rod type anchor rod comprises a spiral anchor head, a grouting drill rod is provided at the tail end of the spiral anchor head, a plurality of threaded magnetic sleeves are sleeved on the grouting drill rod, and a steel pipe is provided outside the threaded magnetic sleeve.

[0006] Preferably, a plurality of slurry outlet holes are evenly arranged on the side wall of the threaded magnetic sleeve.

[0007] Preferably, the lifting frame is a scissor-type support telescopic structure.

[0008] Preferably, a slide rail is provided on the surface of the bearing platform, and the drill rod power source is installed on the slide rail.

[0009] Preferably, the bottom of the working platform is mounted on a guide rail via a pulley.

[0010] Preferably, the grouting drill rod shaft is provided with threads, and the inner wall of the threaded magnetic sleeve is provided with threads.

[0011] Preferably, the surface of the spiral anchor head is provided with threads, and the spiral anchor head is made of hard metal.

[0012] Preferably, a discharge port is provided at the end of the steel pipe.

[0013] In addition, the present invention also discloses a method for treating a working device at a tunnel water inrush and mud inrush, which comprises the following steps: Step 1: Pre-construct the mortar stop wall, which is made of ordinary cement material and has a height from the middle step to the arch. At the same time, reserve a working platform behind the face to facilitate the drilling rig operation. Step 2: After drilling with a drilling rig, insert a magnetic rod at the initial stage, and use a double-liquid grouting device to inject GAGM slurry. The grouting sequence is carried out according to the principle of "from outside to inside, from top to bottom, and skipping holes at intervals" to achieve the purpose of hole grouting and compaction reinforcement; Step 3: After the slurry is initially solidified, the magnetic rod is taken out for recovery; Step 4: Carry out pipe shed support construction; excavate a pipe shed studio in the tunnel as the working space during the entire construction process; Step 5: Set a guide wall on the rear side wall of the pipe shed studio, and bury the pipe shed guide structure in the guide wall; Step 6: Build a working platform in the pipe shed studio, and the working platform can move up, down, left, and right during the construction process; Step 7: Connect the magnetic drill rod screw anchor rod to the drill rod power source and drill it into the guide structure. The drilled spiral anchor head punches a hole at the front end so that the rear end steel pipe reaches the predetermined hole depth. Step 8: Inject GAGM slurry into the steel pipe through the grouting drill pipe and the slurry outlet hole; Step 9: Repeat the above steps until the pipe-roof support construction of all preset drilled holes is completed.

[0014] Furthermore, the GAGM slurry is composed of liquid A and liquid B, wherein the components of liquid A are cement, water, polyacrylamide, flocculant and micron-grade magnetic powder, and the specific ratio thereof is 53:53:12:2:80; and the liquid B is water glass with a dilution degree of 70%. The present invention has the following beneficial effects: 1. The present invention adopts a new material GAGM slurry, which can effectively inject slurry over a large area to treat water and mud inrush in tunnels. For tunnels with considerable water flow, it can effectively treat the problem and carry out subsequent normal construction; 2. The present invention adopts a magnetic drill rod type tunnel pipe shed device to achieve precise drilling through a magnetic drill rod, thereby improving drilling accuracy and construction efficiency; the reserved pores and discharge ports of the steel pipe can discharge rock debris around the drilling rig, reduce drilling resistance, and reduce construction difficulty and cost; after the magnetic drill rod completes grouting, it supports the pipe shed together with the magnetic mortar and steel pipe, thereby improving the stability of the pipe shed; 3. The construction method of the present invention is simple and easy to implement, and is applicable to tunnel projects under various geological conditions, and has broad prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of water and mud burst in a tunnel according to the present invention; Figure 2 It is a schematic diagram of the cross-section diagram of the tunnel advanced curtain grouting reinforcement involved in the present invention; Figure 3 This is a schematic diagram of the structure of the pipe-roof studio in the present invention; Figure 4 It is a schematic diagram of the lifting frame structure in the present invention; Figure 5 It is a schematic diagram of the structure of the magnetic drill rod type anchor in the present invention; Figure 6 It is a schematic diagram of the magnetic drill rod type anchor grouting and sleeve discharge in the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: See also Figures 1 to 6 A working device for use in tunnel water and mud bursting places, comprising a working platform 1 and a magnetic drill rod type anchor 2, wherein the working platform 1 comprises a lifting frame 1.1, a bearing platform 1.2 is provided on the top of the lifting frame 1.1, a drill rod power source 1.3 is slidably provided on the upper surface of the bearing platform 1.2, a pulley 1.4 is provided at the bottom end of the lifting frame 1.1, the working platform 1 is arranged on a guide rail 3, the magnetic drill rod type anchor 2 comprises a spiral anchor head 2.1, a grouting drill rod 2.2 is provided at the tail end of the spiral anchor head 2.1, a plurality of threaded magnetic sleeves 2.4 are sleeved on the grouting drill rod 2.2, and a steel pipe 2.3 is provided outside the threaded magnetic sleeve 2.4.

[0017] Preferably, a plurality of slurry outlet holes 2.4.1 are evenly arranged on the side wall of the threaded magnetic sleeve 2.4.

[0018] Preferably, the lifting frame 1.1 is a scissor-type support telescopic structure.

[0019] Preferably, a slide rail 1.2.1 is provided on the surface of the carrying platform 1.2, and the drill rod power source 1.3 is installed on the slide rail 1.2.1. The drill rod power source can continuously provide power to the drill rod, and a drill rod power tong can be used specifically.

[0020] Preferably, the bottom of the working platform 1 is mounted on the guide rail 3 via a pulley 1.4. The working platform 1 can move forward and backward on the guide rail 3.

[0021] Preferably, the grouting drill rod 2.2 is provided with threads, and the inner wall of the threaded magnetic sleeve 2.4 is provided with threads. The threads can be overlapped according to the required length of the steel pipe.

[0022] Preferably, the surface of the spiral anchor head 2.1 is provided with threads, and the spiral anchor head 2.1 is made of hard metal.

[0023] Preferably, the end of the steel pipe 2.3 is provided with a discharge port 2.3.1. The steel pipe 2.3 is arc welded to the tail end of the spiral anchor head 2.1, and is brought into the reserved pipe shelf hole position by the spiral anchor head 2.1 to support the pipe shelf guide structure. The steel pipe 2.3 has a discharge port 2.3.1, and the debris can be discharged through the discharge port during the process of the drill bit throwing away the rock formation.

[0024] In addition, the present invention also discloses a method for treating a working device at a tunnel water inrush and mud inrush, which comprises the following steps: Step 1: Pre-construction of grout-stopping wall, which is made of ordinary cement material and has a height from the middle step to the arch; at the same time, a working platform is reserved behind the tunnel face to facilitate the drilling rig; the upper section is reinforced with advanced curtain grouting to improve the stratum, stabilize the bottom layer, improve the bearing capacity of the stratum, ensure the safety of tunnel excavation and structure, and curtain grouting can carry out comprehensive compaction grouting on the tunnel face to treat large-area water seepage at the edge of the tunnel and the tunnel face; Step 2: After drilling with a drilling rig, insert a magnetic rod at the initial stage, and use a double-liquid grouting device to inject GAGM slurry. The grouting sequence is carried out according to the principle of "from outside to inside, from top to bottom, and skip holes at intervals" to achieve the purpose of hole grouting and compaction reinforcement; the double-liquid grouting method is used to inject GAGM slurry. This material has a short initial setting time, a high retention rate, high strength after initial setting, and good anti-seepage performance. After injection, it can effectively reinforce the stratum for improvement and solve the problem of water gushing and mud bursting during tunnel construction. Step 3: After the slurry is initially solidified, the magnetic rod is taken out for recovery; Step 4: Carry out pipe shed support construction; excavate a pipe shed studio in the tunnel as the working space during the entire construction process; Step 5: Set a guide wall on the rear side wall of the pipe shed studio, and bury the pipe shed guide structure in the guide wall; Step 6: Lay a working platform 1 in the pipe shed studio, and the working platform 1 can move up, down, left, and right during the construction process; Step 7: Connect the magnetic drill rod screw anchor rod 2 to the drill rod power source 1.3 and drill it into the guide structure. Drill the spiral anchor head 2.1 at the front end to make the rear end steel pipe 2.3 reach the predetermined hole depth. Step 8: injecting GAGM slurry into the steel pipe through the grouting drill pipe 2.2 and the slurry outlet hole 2.4.1; Step 9: Repeat the above steps until the pipe-roof support construction of all preset drilled holes is completed.

[0025] Furthermore, the GAGM slurry is composed of liquid A and liquid B, wherein the components of liquid A are cement, water, polyacrylamide, flocculant and micron-grade magnetic powder, and the specific ratio thereof is 53:53:12:2:80; and the liquid B is water glass with a dilution degree of 70%. The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A working device for use in tunnel water and mud bursts, characterized in that: The invention comprises a working platform (1) and a magnetic drill rod type anchor rod (2), wherein the working platform (1) comprises a lifting frame (1.1), a bearing platform (1.2) is provided on the top of the lifting frame (1.1), a drill rod power source (1.3) is slidably provided on the upper surface of the bearing platform (1.2), a pulley (1.4) is provided at the bottom end of the lifting frame (1.1), the working platform (1) is arranged on a guide rail (3), the magnetic drill rod type anchor rod (2) comprises a spiral anchor head (2.1), a grouting drill rod (2.2) is provided at the rear end of the spiral anchor head (2.1), a plurality of threaded magnetic sleeves (2.4) are sleeved on the grouting drill rod (2.2), and a steel pipe (2.3) is provided outside the threaded magnetic sleeve (2.4).

2. A working device for use in tunnel water and mud bursts according to claim 1, characterized in that: A plurality of slurry outlet holes (2.4.1) are evenly arranged on the side wall of the threaded magnetic sleeve (2.4).

3. A working device for use in tunnel water and mud bursts according to claim 1, characterized in that: The lifting frame (1.1) is a scissor-type support telescopic structure.

4. A working device for use in tunnel water and mud bursts according to claim 1, characterized in that: A slide rail (1.2.1) is provided on the surface of the bearing platform (1.2), and the drill rod power source (1.3) is installed on the slide rail (1.2.1).

5. A working device for use in tunnel water and mud bursts according to claim 1, characterized in that: The bottom of the working platform (1) is mounted on a guide rail (3) via a pulley (1.4).

6. A working device for use in tunnel water and mud bursts according to claim 1, characterized in that: The shaft of the grouting drill rod (2.2) is provided with threads, and the inner wall of the threaded magnetic sleeve (2.4) is provided with threads.

7. A working device for use in tunnel water and mud bursts according to claim 1, characterized in that: The surface of the spiral anchor head (2.1) is provided with threads, and the spiral anchor head (2.1) is made of hard metal.

8. A working device for use in tunnel water and mud bursts according to claim 1, characterized in that: The end of the steel pipe (2.3) is provided with a discharge port (2.3.1).

9. A method for treating water and mud bursts at a working device in a tunnel according to any one of claims 1 to 8, characterized in that: It includes the following steps: Step 1: Pre-construct the mortar stop wall, which is made of ordinary cement material and has a height from the middle step to the arch. At the same time, reserve a working platform behind the face to facilitate the drilling rig operation. Step 2: After drilling with a drilling rig, insert a magnetic rod at the initial stage, and use a double-liquid grouting device to inject GAGM slurry. The grouting sequence is carried out according to the principle of "from outside to inside, from top to bottom, and skipping holes at intervals" to achieve the purpose of hole grouting and compaction reinforcement; Step 3: After the slurry is initially solidified, the magnetic rod is taken out for recovery; Step 4: Carry out pipe shed support construction; excavate a pipe shed studio in the tunnel as the working space during the entire construction process; Step 5: Set a guide wall on the rear side wall of the pipe shed studio, and bury the pipe shed guide structure in the guide wall; Step 6: Build a working platform (1) in the pipe shed studio, wherein the working platform (1) can move up, down, left, and right during the construction process; Step 7: Connect the magnetic drill rod screw anchor rod (2) to the drill rod power source (1.3) and drill it into the guide structure. The drilled spiral anchor head (2.1) drills a hole at the front end so that the rear end steel pipe (2.3) reaches a predetermined hole depth. Step 8: Inject GAGM slurry into the steel pipe through the grouting drill pipe (2.2) and the slurry outlet hole (2.4.1); Step 9: Repeat the above steps until the pipe-roof support construction of all preset drilled holes is completed.

10. A method for treating water and mud bursts at a working device in a tunnel according to claim 9, characterized in that: The GAGM slurry is composed of liquid A and liquid B. The components of liquid A are cement, water, polyacrylamide, flocculant and micron-grade magnetic powder, and the specific ratio is 53:53:12:2:80; the liquid B is water glass with a dilution of 70%.

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