Glass fiber bolt installation device, self-advancing glass fiber bolt and installation method

Abstract

The present invention relates to a glass fiber bolt installation device, a self-advancing glass fiber bolt and an installation method. The object of the present invention is to provide a glass fiber bolt installation device, a self-advancing glass fiber bolt and an installation method. The technical solution of the present invention is: a glass fiber bolt installation device, characterized in that: it has a drill pipe, one end of the drill pipe is detachably installed with a drill bit, a thread is made on the other end of the drill pipe, and a clamping member capable of clamping with the end of the glass fiber bolt is provided on the drill bit. The drill pipe and the drill bit are detachably connected through a circumferential locking mechanism and an axial clamping mechanism. The present invention is applicable to the temporary support of underground projects under complex geological conditions, especially applicable to the support of fault zones, broken zones, soft rocks, and soil tunnel faces where drilling is difficult.

Description

Technical Field

[0001] The present invention relates to a glass fiber bolt installation device, a self-advancing glass fiber bolt and an installation method. It is applicable to the temporary support of underground projects under complex geological conditions, especially applicable to the support of fault zones, broken zones, soft rocks, and soil tunnel faces where drilling is difficult. Background Art

[0002] Under complex geological conditions, it is often difficult to form a drill hole due to reasons such as hole collapse and drill sticking, making it difficult to apply conventional bolts. The installation of the support consumes a lot of time, affects the construction efficiency, threatens the construction safety. The application of self-advancing bolts has achieved good results and accelerated the construction progress under complex geological conditions.

[0003] The Advanced Deformation Analysis of Rock and Soil Construction (ADECO-RS) method, also known as the "New Italian Method", believes that the stability of the tunnel face is of great significance to the safety of the tunnel. For fault zones, broken zones, soft rocks, and soft soil tunnels, after applying the "New Italian Method" for tunnel face support, full-face excavation of the tunnel can be achieved, which is convenient for construction organization and the application of large construction equipment, and improves the construction efficiency.

[0004] Glass fiber bolts have the characteristics of high longitudinal tensile strength, low shear strength, and easy removal. For the reinforcement of temporary projects such as tunnel faces, the construction efficiency can be improved and the construction safety can be guaranteed. Self-advancing metal bolts are difficult to remove and are not suitable for the support of temporary projects such as tunnel faces.

[0005] However, for tunnel faces that need to be reinforced with glass fiber bolts, the geological conditions are usually poor, and it is relatively easy to have the phenomenon of difficult hole formation. The installation of glass fiber bolts may consume a lot of time, affect the construction period, and it is difficult to give full play to the advantages of the "New Italian Method". Summary of the Invention

[0006] The technical problem to be solved by the present invention is: in view of the above problems, to provide a glass fiber bolt installation device, a self-advancing glass fiber bolt and an installation method.

[0007] The technical solution adopted by the present invention is: a glass fiber bolt installation device, characterized in that: it has a drill rod, one end of the drill rod is detachably installed with a drill bit, the other end of the drill rod is provided with a thread, and the drill bit is provided with a clamping member that can be clamped with the end of the glass fiber bolt.

[0008] The drill rod and the drill bit are detachably connected through a circumferential locking mechanism and an axial clamping mechanism.

[0009] The circumferential locking mechanism includes a T-shaped connection head made on the drill bit installation end of the drill rod and perpendicular to the axis of the drill rod, and a connection groove made on the end face of the drill rod installation end of the drill bit and adapted to the T-shaped connection head.

[0010] The drill bit is provided with grouting holes penetrating through the drill bit along its axial direction.

[0011] The axial clamping mechanism includes a connecting sleeve coaxially made on the end face of the drill pipe mounting end of the drill bit, a circle of spring buckles made on the inner wall of the connecting sleeve, and a semi-elliptical protrusion made on the outer wall of the drill bit mounting end of the drill pipe that can cooperate with the spring buckles to achieve axial locking.

[0012] The clamping part is a rubber ring made in a circle on the outer wall of the connecting sleeve.

[0013] A self-advancing glass fiber bolt used in cooperation with the glass fiber bolt installation device, characterized in that: the inner diameter of the glass fiber bolt is larger than the diameter of the drill pipe, the outer diameter is smaller than the diameter of the drill bit, one end of the glass fiber bolt is provided with a clamping part that can cooperate with the clamping part on the drill bit to realize the clamping and fixing of the drill bit and the glass fiber bolt, and the other end of the glass fiber bolt is provided with a thread.

[0014] The glass fiber bolt body is provided with grouting holes.

[0015] The clamping part is a gradually changing opening made on the inner wall of the end of the glass fiber bolt. The inner diameter of the gradually changing opening gradually decreases from its end inward. The outer diameter of the outer end of the gradually changing opening is slightly larger than the outer diameter of the rubber ring, and the inner diameter of the inner end of the gradually changing opening is slightly smaller than the outer diameter of the rubber ring.

[0016] An installation method of the self-advancing glass fiber bolt, characterized in that:

[0017] Connect one end of the drill pipe to the drill bit, sleeved the glass fiber bolt on the drill pipe, and connect the other end of the drill pipe to the drilling rig;

[0018] At the engineering position where the glass fiber bolt needs to be applied, drill a hole through the drill bit, and drill the glass fiber bolt sleeved on the drill pipe. When the length of the drill pipe and the glass fiber bolt outside the hole is less than 20 cm, connect the next drill pipe and the glass fiber bolt section through the sleeve and the thread until the applied length reaches the support requirement;

[0019] When the drilling is completed and the glass fiber bolt reaches the designated installation position, pull out the drill pipe outward from the hole to separate the drill pipe from the drill bit, and at the same time, fix the connection between the drill bit and the end of the glass fiber bolt during the process of pulling out the drill pipe;

[0020] Perform grouting through the glass fiber bolt, and diffuse through the grouting holes of the drill bit and the grouting holes of the hollow glass fiber bolt body, so that the slurry can better wrap the glass fiber bolt body, realizing the rapid installation of the glass fiber bolt under complex geological conditions.

[0021] The beneficial effects of the present invention are as follows: In the glass fiber bolt installation device of the present invention, the drill bit is detachably installed on the drill rod. A clamping member is provided on the drill bit, which can separate the drill rod from the drill bit after the drilling is completed and fix the drill bit to the end of the glass fiber bolt. The rubber ring between the drill bit and the glass fiber bolt achieves a pressure - starting effect during subsequent grouting.

[0022] The present invention sleeves the glass fiber bolt on the drill rod. After the drill bit drills a hole, the glass fiber bolt can be quickly installed into the hole, improving the construction efficiency and ensuring the construction safety. Brief Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the embodiment.

[0024] Figure 2 It is a schematic structural diagram of the drill bit part in the embodiment.

[0025] Figure 3 It is a schematic structural diagram of the drill rod in the embodiment.

[0026] Figure 4 It is a schematic connection diagram of the drill bit and the drill rod in the embodiment.

[0027] 1. Drill rod; 2. Glass fiber bolt; 3. Drill bit; 4. Rubber ring; 5. T - shaped connector; 6. Semi - elliptical protrusion; 7. Spring buckle; 8. Grouting hole. Detailed Embodiment

[0028] This embodiment is a glass fiber bolt installation method for quickly installing glass fiber bolts, which is installed using a glass fiber bolt installation device.

[0029] In this example, the glass fiber bolt installation device has a drilling rig, a drill rod, and a drill bit. The drill rod is a round rod with a length of 0.5 - 1.0 m. One end of the drill rod is detachably installed with the drill bit through a circumferential locking mechanism and an axial clamping mechanism. The other end of the drill rod is provided with threads. The threads on the drill rod are convenient for connecting the drill rod to the drilling rig on one hand and for lengthening the drill rod on the other hand. By connecting multiple drill rods through sleeves, it meets the requirements of the support length of the glass fiber bolt.

[0030] In this embodiment, the circumferential locking mechanism includes a T - shaped connector made on the drill - bit installation end of the drill rod and perpendicular to the axis of the drill rod, and a connection groove made on the end face of the drill - rod installation end of the drill bit and adapted to the T - shaped connector. The drill rod is inserted into the connection groove of the drill bit through the T - shaped connector to achieve coaxial connection between the drill rod and the drill bit, so that the drill rod drives the drill bit to rotate synchronously when rotating.

[0031] In this example, a grouting hole is made along the axis of the drill bit and penetrates the drill bit. The grouting hole communicates with the connection groove at the end of the drill bit, which is convenient for injecting slurry after the drilling is completed, so that the slurry can better wrap the glass fiber bolt and achieve a reinforcement effect.

[0032] In this embodiment, the axial clamping mechanism includes a connecting sleeve coaxially formed on the end face of the drill pipe mounting end of the drill bit. A circle of spring buckles is formed on the inner wall of the connecting sleeve, and a semi-elliptical protrusion capable of cooperating with the spring buckle to achieve axial locking is formed on the outer wall of the drill bit mounting end of the drill pipe. The drill pipe is inserted into the connecting sleeve, and the axial position is locked through the cooperation of the semi-elliptical protrusion on the drill pipe and the spring buckle.

[0033] In this example, a clamping member capable of cooperating with the end of the glass fiber bolt to achieve clamping is provided on the outer wall of the connecting sleeve. The clamping member is a circle of rubber rings coaxially connected to the outer wall of the connecting sleeve.

[0034] In this embodiment, the length of the glass fiber bolt is adapted to the drill pipe, with a hollow structure of 0.5 - 1.0 m. The inner diameter of the glass fiber bolt is slightly larger than the outer diameter of the connecting sleeve and can be nested outside the drill pipe. One end of the glass fiber bolt is provided with a clamping portion capable of cooperating with the rubber ring on the drill bit to achieve clamping and fixing of the drill bit and the glass fiber bolt. The other end of the glass fiber bolt is provided with threads, which facilitate the extension of the hollow glass fiber bolt. Multiple glass fiber bolts are connected through a sleeve to meet the requirements of the support length.

[0035] To avoid blockage of the grouting hole of the drill bit or other conditions, grouting holes can be provided on the body of the glass fiber bolt to achieve the grouting effect.

[0036] In this embodiment, the clamping portion is a gradually changing opening formed on the inner wall of the end of the glass fiber bolt. The inner diameter of the gradually changing opening gradually decreases from the end of the glass fiber bolt inward. The outer diameter of the outer end of the gradually changing opening is slightly larger than the outer diameter of the rubber ring, and the inner diameter of the inner end of the gradually changing opening is slightly smaller than the outer diameter of the rubber ring.

[0037] The specific installation method of the glass fiber bolt in this embodiment is as follows:

[0038] Take 1 drill pipe and insert the drill pipe into the connecting sleeve of the drill bit until the T-shaped connecting head on the drill pipe is inserted into the connecting groove on the drill bit and the semi-elliptical protrusion on the drill pipe cooperates with the spring buckle in the connecting sleeve to achieve clamping and fixing;

[0039] Put the hollow glass fiber bolt on the drill pipe;

[0040] Connect the drill pipe to the drilling rig;

[0041] At the engineering position where the glass fiber bolt needs to be applied, drill a hole and drill the connected self-advancing hollow glass fiber bolt into it;

[0042] When the length of the drill pipe or the glass fiber bolt outside the drill hole is less than 20 cm, connect the next drill pipe and glass fiber bolt section through a sleeve until the applied length reaches the support requirement;

[0043] When the drilling is completed and the glass fiber bolt reaches the designated installation position, the drill pipe is pulled out axially along the drill pipe to separate the drill pipe from the drill bit. At the same time, during the process of pulling out the drill pipe, the drill bit and the glass fiber bolt are clamped through the gradually changing opening of the rubber ring. During subsequent grouting, the rubber ring achieves the effect of pressure rise.;

[0044] Grouting is carried out through the hollow glass fiber bolt and diffused through the grouting holes of the drill bit and the rod body of the glass fiber bolt, so that the slurry can better wrap the rod body and realize the rapid installation of the glass fiber bolt under complex geological conditions.

Claims

1. An installation method of a self-advancing glass fiber bolt, characterized in that: Installed by using a glass fiber bolt installation device. The glass fiber bolt installation device has a drill, a drill pipe and a drill bit. One end of the drill pipe is detachably installed with the drill bit, and the other end of the drill pipe is provided with threads. The drill bit is provided with a clamping member that can be clamped with the end of the glass fiber bolt. The drill pipe and the drill bit are detachably connected through a circumferential locking mechanism and an axial clamping mechanism. The circumferential locking mechanism includes a T-shaped connector and a connecting groove. The T-shaped connector is placed on the drill bit installation end of the drill pipe and is perpendicular to the axis of the drill pipe. The connecting groove is placed on the end face of the drill bit for installing the drill pipe and is adapted to the T-shaped connector. The drill bit is provided with a grouting hole that penetrates the drill bit axially. The axial clamping mechanism includes a connecting sleeve and a semi-elliptical protrusion. The connecting sleeve is coaxially placed on the end face of the drill bit for installing the drill pipe, and a circle of spring buckles are made on the inner wall of the connecting sleeve. The semi-elliptical protrusion is placed on the outer wall of the drill bit installation end of the drill pipe, and the semi-elliptical protrusion can cooperate with the spring buckle to achieve axial locking. The inner diameter of the glass fiber bolt is larger than the diameter of the drill pipe, and the outer diameter is smaller than the diameter of the drill bit. One end of the glass fiber bolt is provided with a clamping part that can cooperate with the clamping member on the drill bit to realize the clamping and fixing of the drill bit and the glass fiber bolt. The other end of the glass fiber bolt is provided with threads. The clamping member is a rubber ring placed on the outer wall of the connecting sleeve. The clamping part is a gradually changing opening placed on the inner wall of the end of the glass fiber bolt. The inner diameter of the gradually changing opening gradually decreases from its end inward. The outer diameter of the outer end of the gradually changing opening is slightly larger than the outer diameter of the rubber ring, and the inner diameter of the inner end of the gradually changing opening is slightly smaller than the outer diameter of the rubber ring. The glass fiber bolt rod body is provided with grouting holes. The installation method includes: Take 1 drill pipe, insert the drill pipe into the connecting sleeve of the drill bit until the T-shaped connector on the drill pipe is inserted into the connecting groove on the drill bit and the semi-elliptical protrusion on the drill pipe cooperates with the spring buckle in the connecting sleeve to achieve clamping and fixing. Put the hollow glass fiber bolt on the drill pipe. Connect the drill pipe to the drill. At the engineering position where the glass fiber bolt needs to be applied, drill a hole and drill the connected self-advancing hollow glass fiber bolt into it. When the length of the drill pipe or the glass fiber bolt outside the hole is less than 20 cm, connect the next drill pipe and glass fiber bolt section through a sleeve until the applied length reaches the support requirement. When the drilling is completed and the glass fiber bolt reaches the designated installation position, pull out the drill pipe axially outward along the axis of the drill pipe so that the drill pipe is separated from the drill bit. At the same time, during the process of pulling out the drill pipe, the drill bit and the glass fiber bolt are clamped through the cooperation of the rubber ring and the gradually changing opening, and the rubber ring achieves the pressure-raising effect during subsequent grouting. Perform grouting through the hollow glass fiber bolt, and the grout diffuses through the grouting hole of the drill bit and the grouting hole of the glass fiber bolt rod body, so that the grout wraps the rod body, realizing the rapid installation of the glass fiber bolt under complex geological conditions.

Images