Fault fracture zone fissure rock mass grouting device and method thereof

Abstract

The present application relates to the technical field of fault fracture zone rock mass reinforcement, and discloses a fault fracture zone fissure rock mass grouting device, wherein a tunnel is excavated by a heading machine in a rock mass layer, a rotating ring is arranged at the tail of the heading machine, an extender is arranged on the rotating ring, a cross beam is arranged at the extending end of the extender, and a fissure reinforcement device is slidably connected to the cross beam. The present application has the following beneficial effects: the grid plate can act as a reinforcing steel framework structure in the reinforcing body, thereby improving the tensile stress and shear stress of the reinforcing body, and further improving the reinforcement effect on the fissure; the front end section and the rear end section of the anchor rod are intermittently coaxial or misaligned; the concrete slurry can be directly injected into the fissure, thereby avoiding the blockage of the concrete slurry in the anchor rod and the dense filling in the fissure.

Description

Technical Field

[0001] This invention relates to the field of fault fracture zone rock mass reinforcement technology, and in particular to a grouting device for fractured rock mass in fault fracture zones. Background Technology

[0002] In tunnel and underground engineering construction, it is inevitable to traverse fault fracture zones. The rock mass in these areas typically exhibits well-developed joints and fissures, is fractured, and has extremely poor self-stability. To ensure construction safety and long-term structural stability, effective reinforcement of the fractured rock mass within the fault fracture zone is essential. Among existing technologies, grouting reinforcement is one of the most commonly used methods. Its principle involves injecting concrete grout into the fractures of the rock mass using grouting equipment. After the grout solidifies and hardens, it binds the fractured rock fragments into a cohesive whole, thereby improving the integrity and strength of the rock mass. Currently, existing grouting devices for fractured rock masses in fault fracture zones typically include a grouting pump, a grout mixing tank, a grouting pipe, and a grout stopper. The working process involves drilling grouting holes in the rock mass, lowering the grouting pipe into the hole to a predetermined depth, sealing the hole section with a grout stopper, and then using the grouting pump to inject grout under high pressure, allowing it to penetrate and fill the surrounding rock fractures. This traditional grouting method relies entirely on the solidified rock mass formed by the grout itself to cement the rock blocks. In areas with extremely harsh geological conditions, such as fault fracture zones, where rock fissures are often highly developed and complexly distributed, the reinforcement ring formed by simply relying on the grout-cemented rock mass is essentially a "plain concrete" structure. This structure lacks an effective steel reinforcement framework to withstand tensile and shear stresses. Rock masses cemented solely by grout-cemented rock masses have low overall tensile and shear strength, making them prone to brittle failure under long-term ground pressure or disturbance. This can lead to cracking, spalling, or even collapse of the tunnel walls, seriously threatening the long-term stability and operational safety of the tunnel structure. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a grouting device for fractured rock masses in fault zones.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A grouting device for fractured rock mass in fault zones is used to excavate tunnels within the rock mass using a tunnel boring machine. The tunnel boring machine has a rotating ring at its tail end, on which is mounted an expansion joint. A crossbeam is mounted on the expansion end of the expansion joint, and a fracture reinforcement device is slidably connected to the crossbeam. The fracture reinforcement device includes a cover with one open side, inside which a grid plate is snapped. One side of the cover has a clearance hole containing a guide block. One side of the guide block has a guide hole. Anchor bolts are driven into the fractured areas on the inner wall of the tunnel through the guide hole. Simultaneously, the pins of the grid plate are inserted into the inner wall of the tunnel. A grouting pipe is inserted into the anchor bolt through the guide hole, and a sealing plug is used to seal the gap between the guide hole and the grouting pipe.

[0005] Furthermore, the anchor bolt includes a front end section and a rear end section, wherein the front end section can be slidably connected along the radial direction of the rear end section, thereby making the front end section and the rear end section coaxial or misaligned.

[0006] Furthermore, the housing is provided with an arc-shaped beam, the arc-shaped beam is provided with a clearance groove, the anchor rod passes through the clearance groove, the arc-shaped beam is provided with an installation groove, and the installation groove is provided with a wobbling connection device.

[0007] Furthermore, the swaying connection device includes a base plate, on the side of the base plate facing the anchor rod, a swaying block is provided on one side of the swaying block, the front end section of the anchor rod is located in the arc-shaped groove, and a lifting device is installed on the top outer side of the cover, the telescopic end of the lifting device extends into the cover and is detachably connected to the arc-shaped beam.

[0008] Furthermore, the substrate is rotatably connected in the mounting groove via a rotating shaft. A slot is provided on one side of the substrate. When the substrate rotates, the slot engages with the grid plate. An angle adjustment device is installed on the arc-shaped beam, and the driving device is used to adjust the rotation angle of the substrate.

[0009] The present invention also discloses a grouting method for fractured rock mass in fault fracture zone, wherein the above-mentioned grouting device for fractured rock mass in fault fracture zone is used to grout and reinforce the fractured rock mass in fault fracture zone.

[0010] Advantages of this invention: The mesh plate can act as a steel reinforcement skeleton within the reinforced body, thereby increasing the tensile and shear stresses of the reinforced body and thus improving the reinforcement effect on cracks. The front and rear sections of the anchor rods are intermittently coaxial or misaligned, allowing concrete grout to be directly injected into the cracks, preventing the concrete grout from clogging inside the anchor rods and causing the cracks to be densely filled. The base plate is rotated, thereby locking the base plate and the mesh plate together to form an integral reinforced steel mesh structure, further improving the reinforcement effect on cracks. Attached Figure Description

[0011] Figure 1This is a schematic diagram of the basic structure of the grouting device for fractured rock mass in fault zones provided by the present invention; Figure 2 yes Figure 1 A schematic diagram of the basic structure of a tunneling machine (excluding the tunneling machine); Figure 3 yes Figure 1 Enlarged view of point A; Figure 4 This is a schematic diagram of the basic structure of a crack reinforcement device; Figure 5 yes Figure 1 A schematic diagram of the basic structure without the casing; Figure 6 yes Figure 5 Cross-sectional view; Figure 7 yes Figure 6 Enlarged view of point M. Detailed Implementation

[0012] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0013] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0014] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0015] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0016] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] Example 1 like Figures 1-7 As shown, the grouting device for fractured rock mass in the fault fracture zone of this embodiment excavates a tunnel 700 within the rock mass layer 100 using a tunnel boring machine 200. The tail of the tunnel boring machine 200 is equipped with a rotating ring 300, on which an expansion joint 400 is mounted. The expansion joint 400 is a prior art technology. A crossbeam 500 is mounted on the telescopic end of the expansion joint 400, and a fracture reinforcement device 600 is slidably connected to the crossbeam 500. During use, the rotating ring 300 rotates, thereby aligning the fracture reinforcement device 600 with the fracture. The fracture is reinforced by the fracture reinforcement device 600. During the reinforcement process, the tunnel boring machine 200 does not need to stop and can continue to excavate forward. The fracture reinforcement device 600 and the fracture in the tunnel 700 remain relatively stationary. As the tunnel boring machine 200 continues to rotate and move forward, the rotating ring 300 and the crossbeam 500 also move forward, resulting in relative displacement between the fracture reinforcement device 600 and the crossbeam 500. Therefore, when the crack is reinforced by the crack reinforcement device 600, it will not affect the normal tunneling operation of the tunneling machine 200.

[0019] In this embodiment, the crack reinforcement device 600 includes a cover 1 with one open side. The open side of the cover 1 is arc-shaped and matches the inner wall of the tunnel 700. A grid plate 3 is snapped into the cover 1. A clearance hole is provided on one side of the cover 1, and a guide block 11 is installed in the clearance hole. A guide hole is provided on one side of the guide block 11. Anchor rods 2 are driven into the crack location on the inner wall of the tunnel 700 from the guide hole. At the same time as the anchor rods are driven in, the pins of the grid plate 3 are inserted into the inner wall of the tunnel 700. The anchor rod 2 includes a front end section 21 and a rear end section 22. The front end section 21 can slide along the radial direction of the rear end section 22, so that the front end section 21 and the rear end section 22 are coaxial or misaligned.

[0020] An arc-shaped beam 4 is provided inside the casing 1. The arc-shaped beam 4 has a clearance groove through which the anchor rod 2 passes. The arc-shaped beam 4 has a mounting groove 40, within which a wobbling connection device 6 is installed. The wobbling connection device 6 includes a base plate 61. A wobbling block 63 is mounted on the side of the base plate 61 facing the anchor rod 2. An arc-shaped groove is provided on one side of the wobbling block 63, and the front end section 21 of the anchor rod 2 is located within the arc-shaped groove. A lifting device 5 is mounted on the top outer side of the casing 1. The telescopic end of the lifting device 5 extends into the casing 1 and is detachably connected to the arc-shaped beam 4. The lifting device 5 is prior art; during use, a release agent needs to be applied to the telescopic end of the lifting device 5. The substrate 61 is rotatably connected within the mounting groove 40 via a rotating shaft 43. A slot 62 is provided on one side of the substrate 61; when the substrate 61 rotates, the slot 62 engages with the grid plate 3. An angle adjustment device is mounted on the arc-shaped beam 4, and a driving device is used to adjust the rotation angle of the substrate 61. A driving hole is provided on one side of the mounting groove 40, within which the rotating shaft 43 can be rotatably or slidably connected. A ball is mounted on the rotating shaft 43, and a spiral groove is provided on the inner wall of the driving hole, within which the ball slides. The driving device includes a pull rope 44, which passes through the threaded groove 42 of the arc-shaped beam 4 and extends to the outside of the cover 1. When the substrate 61 needs to rotate, simply pulling the pull rope 44 achieves this, thereby engaging the substrate 61 with the grid plate 3.

[0021] This invention also discloses a grouting method for fractured rock masses in fault zones, using the aforementioned grouting device for reinforcing fractured rock masses in fault zones. During grouting, a grouting pipe 13 is inserted into the anchor rod 2 through a guide hole, and the gap between the guide hole and the grouting pipe 13 is sealed by a sealing plug 12. Concrete solution is injected into the grouting pipe 13, entering the anchor rod 2 and gradually penetrating into the rock mass layer 100 and the fractures. Simultaneously, excess grout forms a solidified body within the casing 1, further enhancing the reinforcement effect on the fractures. A metal mesh plate 3 is present within the solidified body. After curing, the mesh plate 3 acts as a reinforcing steel skeleton within the solidified body, increasing the tensile and shear stresses, thereby improving the reinforcement effect on the fractures.

[0022] Simultaneously, after the concrete grout is injected, the lifting device 5 drives the arc-shaped beam 4 to move up and down. On the one hand, the arc-shaped beam 4 creates a disturbance force within the casing 1, effectively preventing segregation of the concrete grout and expelling air from the grout within the casing 1. On the other hand, as the arc-shaped beam 4 moves up and down, the base plate 61 and the swaying block 63 also move up and down. The swaying block 63 drives the rear end section 22 of the anchor rod 2 to move up and down, causing the front end section 21 and the rear end section 22 to intermittently coaxialize or misalign. When the front end section 21 and the rear end section 22 are misaligned, the concrete grout can be directly injected into the crack, preventing the concrete grout from clogging within the anchor rod 2 and causing the crack to be densely filled. Before the concrete grout initially sets, the pull rope 44 is pulled upwards, causing the base plate 61 to rotate and thus engaging the base plate 61 with the mesh plate 3, forming an integrated reinforced steel mesh structure, further improving the reinforcement effect on the crack. After the concrete slurry reaches 75% of its design strength, the expansion joint 400 drives the crossbeam 500 and the cover 1 to retract, thereby removing the cover 1.

Claims

1. A grouting device for fractured rock mass in a fault zone, characterized in that, A tunnel (700) is excavated within the rock mass layer (100) by a tunnel boring machine (200). The tunnel boring machine (200) has a rotating ring (300) at its tail end, and an expansion joint (400) is mounted on the rotating ring (300). A crossbeam (500) is mounted on the telescopic end of the expansion joint (400), and a fracture reinforcement device (600) is slidably connected to the crossbeam (500). The fracture reinforcement device (600) includes a cover (1) with one side open, and a grid plate (3) is snapped into the cover (1). The shell (1) has a clearance hole on one side, and a guide block (11) is installed in the clearance hole. The guide block (11) has a guide hole on one side. An anchor rod (2) is driven into the inner wall of the tunnel (700) from the guide hole to the location where there is a crack. At the same time as driving in the anchor rod, the pin of the grid plate (3) is inserted into the inner wall of the tunnel (700). The grouting pipe (13) is inserted into the anchor rod (2) from the guide hole. The gap between the guide hole and the grouting pipe (13) is sealed by the sealing plug (12).

2. The grouting device for fractured rock mass in fault zones according to claim 1, characterized in that: The anchor rod (2) includes a front end section (21) and a rear end section (22). The front end section (21) can slide along the radial direction of the rear end section (22), so that the front end section (21) and the rear end section (22) are coaxial or misaligned.

3. The grouting device for fractured rock mass in fault zones according to claim 2, characterized in that: The casing (1) is provided with an arc-shaped beam (4), the arc-shaped beam (4) is provided with a relief groove, the anchor rod (2) passes through the relief groove, the arc-shaped beam (4) is provided with an installation groove (40), and the installation groove (40) is provided with a swaying connection device (6).

4. The grouting device for fractured rock mass in fault zones according to claim 3, characterized in that: The swaying connection device (6) includes a base plate (61), on which a swaying block (63) is mounted on the side facing the anchor rod (2). An arc groove is provided on one side of the swaying block (63). The front end section (21) of the anchor rod (2) is located in the arc groove. A lifting device (5) is mounted on the top outer side of the cover (1). The telescopic end of the lifting device (5) extends into the cover (1) and is detachably connected to the arc beam (4).

5. The grouting device for fractured rock mass in fault-bounded zones according to claim 4, characterized in that: The substrate (61) is rotatably connected in the mounting groove (40) via a rotating shaft (43). A slot (62) is provided on one side of the substrate (61). When the substrate (61) rotates, the slot (62) engages with the grid plate (3). An angle adjustment device is installed on the arc beam (4). The driving device is used to adjust the rotation angle of the substrate (61).

6. A grouting method for fractured rock masses in fault zones, characterized in that: The grouting device for fractured rock mass in fault fracture zone as described in any one of claims 1-5 is used to reinforce the fractured rock mass in fault fracture zone by grouting.

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