A device for processing boulders under a shield tunnel

Abstract

This utility model relates to the field of tunnel boring machine (TBM) construction technology, and in particular to a device for handling isolated boulders during TBM tunneling. The device includes a mobile carrier, grouting equipment, a drive unit, and a drilling grouting rod. The grouting equipment and the drive unit are both mounted on the mobile carrier. The drive unit drives the drilling grouting rod, and the grouting equipment is connected to the drilling grouting rod, which has grouting holes. The advantages of this utility model are: it enables blast drilling of isolated boulders and grouting of the soil at the tunnel face, ensuring the quality and effectiveness of boulder treatment; it allows for automated control based on exploration results, improving construction efficiency and quality; and its simple and reasonable structure, strong mobility, and suitability for widespread application.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine (TBM) construction technology, and in particular to a device for handling isolated boulders during TBM tunneling. Background Technology

[0002] The isolated boulders in the shield tunnel section cause severe damage to the shield machine's cutterhead and cutters, requiring frequent pressurized entry for cutterhead replacement, which significantly impacts the construction schedule and increases construction costs. Due to the complexity of the engineering geology, if the cutterhead is damaged or the strata do not meet the conditions for pressurized entry, the project will face significant obstacles. Therefore, it is necessary to address the isolated boulders in the shield tunnel section.

[0003] Currently, the handling of isolated boulders is mainly divided into salvage and blasting based on their volume. Smaller boulders can be directly salvaged using salvage equipment, while larger boulders that cannot be salvaged need to be blasted to break them into smaller pieces before salvage, or they can be directly broken into pieces that are suitable for the cutterhead and cutters of the tunnel boring machine according to the design.

[0004] However, when blasting isolated boulders, the blasting force will act on the tunnel face during the tunnel boring machine's excavation process, causing the tunnel face to become loose and unstable, which is detrimental to the subsequent tunneling process of the tunnel boring machine. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the existing technology by providing a device for handling isolated boulders during tunnel boring machine (TBM) operations. This device simultaneously performs explosive drilling on the boulders and grouting of the soil at the tunnel face, ensuring the quality and capacity of the boulder handling process.

[0006] The objective of this utility model is achieved through the following technical solution: A device for handling isolated boulders during tunnel boring machine (TBM) passage is characterized by comprising a mobile vehicle, a grouting device, a drive device, and a drilling grouting rod, wherein the grouting device and the drive device are both mounted on the mobile vehicle, the drive device is connected to drive the drilling grouting rod, the grouting device is connected to the drilling grouting rod, and the drilling grouting rod has grouting holes.

[0007] The drive device is equipped with a depth sensor and a controller. The depth sensor is located on the drill grouting rod, and the controller is connected to the depth sensor and controls the working state of the drive device based on the data collected by the depth sensor.

[0008] The drive device is connected to drive the drilling grouting rod to drill down and rotate.

[0009] The grouting rod adopts an extendable assembly structure.

[0010] The grouting hole has a temporary sealing body, which seals the grouting hole during the drilling process of the grouting rod. When the grouting rod is grouting, the temporary sealing body is removed from the grouting hole under the grouting pressure.

[0011] The advantages of this utility model are: it enables explosive drilling of boulders and grouting of the soil in the working face area, ensuring the treatment quality and capacity of boulders; it can achieve automated control based on exploration results, improving construction efficiency and quality; and it has a simple and reasonable structure, strong mobility, and is suitable for widespread application. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the grouting rod of this utility model. Detailed Implementation

[0013] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art: like Figure 1-2 As shown in the figure, 1-10 represent: mobile vehicle 1, grouting equipment 2, drive device 3, drill grouting rod 4, boulder 5, grouting reinforcement area 6, tunnel section shield 7, connector 8, drill bit 9, grouting hole 10.

[0014] Example: Figure 1 and Figure 2 As shown, in this embodiment, the boulder treatment device under the tunnel section shield is used to treat the boulder intruding into the tunnel section shield 7. On the one hand, it opens an explosion hole on the boulder 5 for subsequent explosion treatment. On the other hand, it grouts and reinforces the soil between the boulder 5 and the tunnel section shield 7 to ensure the stability of the tunnel section shield face within the range of the boulder explosion treatment.

[0015] Specifically, the boulder treatment device in this embodiment includes a mobile vehicle 1, which can be an engineering vehicle that travels on land or a boat that travels in water. The mobile vehicle 1 is used to carry various functional equipment, mainly including grouting equipment 2, drive device 3 and drilling grouting rod 4.

[0016] The grouting equipment 2 is mounted on the mobile carrier 1 and includes a grout storage container for storing grouting slurry, a pump body for pumping grouting solution, and a pipe connecting the grout storage container and the drill grouting rod 4. In use, the pump body can pump the grouting slurry in the grout storage container to the drill grouting rod 4.

[0017] The drive unit 3 is mounted on the mobile carrier 1 and can refer to existing rotary drilling rigs. It has a slewing mechanism, such as a ring-shaped slewing head, which can be fixedly mounted around the drill grouting rod 4. The slewing head can rotate under power, thereby driving the drill grouting rod 4 to rotate. The drive unit 3 also has a lifting mechanism, which can drive the slewing head to lift and lower, so that the drill grouting rod 4 can both rotate and be lifted and lowered.

[0018] like Figure 2 As shown, the grouting drill rod 4 includes a rod body whose length is matched to the depth of the boulder to be treated provided by the exploration operation. When the depth is deep, the grouting drill pipe 4 can be assembled using a splicing structure. For example, grouting drill pipe segments can be prefabricated in sections, with threaded structures at both ends of the prefabricated grouting drill pipe segments. This allows the prefabricated grouting drill pipe segments to form a detachable splicing structure through threaded engagement, thus meeting the depth requirements for boulder treatment. The material and structural parameters of the grouting drill pipe 4 are designed and calculated based on the required borehole strength. Several evenly arranged grouting holes 10 are opened in the lower part of the rod body of the grouting drill rod 4. Grout pumped by the grouting equipment 2 can be sprayed out from each grouting hole 10 to reinforce the soil at the corresponding location.

[0019] In this embodiment, to prevent the grouting holes 10 from becoming blocked during drilling, temporary sealing bodies, such as sealing plugs, are provided at the location of each grouting hole 10 to temporarily block the grouting hole 10. When the grouting equipment 2 performs pressure grouting, the pressure of the grout can push open the temporary sealing bodies to facilitate grouting. In some cases, the grouting hole 10 may also be further equipped with a one-way valve or other device to further prevent the backflow of the grout, and an existing device or component to prevent blockage is provided at the opening of the valve body.

[0020] A drill bit 9, which is conical in shape, is provided at the bottom of the grouting pipe 4. The strength of the drill bit 9 is greater than that of the grouting pipe 4, so as to drill holes in boulders. A connector 8 is provided at the top of the grouting pipe 4. The connector 8 is used to connect with the drive device 3 to ensure a stable connection between the grouting pipe 4 and the drive device 3.

[0021] In this embodiment, in order to improve construction efficiency and construction quality, a depth sensor and a controller can be further installed on the device. The depth sensor is installed on the drilling grouting rod 4 to determine the depth when it is drilled down, while the controller can receive the data from the depth sensor and connect to drive the grouting equipment 2 and the drive device 3 to work.

[0022] In this embodiment, when applied, Figure 1 For example, the following methods are included: 1) Conduct exploration work on the boulder 5 affecting the shield tunnel 7 section to determine various parameters of the boulder 5, such as its location, boundaries, volume, and properties. Based on the condition of the boulder 5 and in accordance with the specifications, determine a specific plan for its blasting treatment, and also assess the impact of the blasting plan on the soil at the tunnel face of the shield tunnel 7 section. In this embodiment, the grouting reinforcement area 6 is the area mainly affected by the blasting force.

[0023] 2) Drive the mobile vehicle 1 to the designated location. Assemble the drilling grouting pipe 4 in situ and connect the drilling grouting pipe 4 to the grouting equipment 2 and the drive device 3.

[0024] 3) Start the drive unit 3 to drive the drill grouting rod 4 to rotate and descend. The drill grouting rod 4 gradually descends until it contacts the boulder 5, at which point the drill bit 9 rotates to drill a hole in the boulder 5. Throughout the process, the depth sensor collects the depth of the drill grouting rod 4 in real time, especially the depth of the drill bit 9.

[0025] 4) As the grouting rod 4 is lowered, the drill bit 9 penetrates the boulder 5 and reaches the grouting reinforcement area 6. Drilling continues to a certain depth so that the grouting hole 10 of the grouting rod 4 is located within the grouting reinforcement area. During this process, the drilling depth of the grouting rod 4 is strictly controlled to avoid adverse effects on the tunnel boring machine 7.

[0026] 5) Start the grouting equipment 2 to grout the drill grouting rod 4. The grout is sprayed from the grouting hole 10 into the grouting reinforcement area 6 to achieve grouting reinforcement of the grouting reinforcement area 6. In some cases, during the grouting process of the drill grouting rod 4, the drive device 3 still drives the drill grouting rod 4 to rotate to improve the uniformity of grouting reinforcement.

[0027] 6) After completion, the drilling and grouting rod 4 is lifted by the drive device 3 for recovery. At this time, the boulder 5 has completed the drilling and opening of the blast hole, and the grouting reinforcement area 6 within the blast influence range has been grouted and reinforced.

[0028] 7) Repeat this process, drilling and opening holes in boulder 5 according to the specific plan for blasting operations, while simultaneously reinforcing the grouting reinforcement area 6.

[0029] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A device for handling isolated boulders during tunnel boring machine (TBM) passage, characterized in that: The device includes a mobile carrier, grouting equipment, a drive unit, and a drilling grouting rod. The grouting equipment and the drive unit are both mounted on the mobile carrier. The drive unit is connected to drive the drilling grouting rod. The grouting equipment is in communication with the drilling grouting rod, and the drilling grouting rod has grouting holes.

2. The device for handling isolated boulders during tunnel boring machine (TBM) passage according to claim 1, characterized in that: The drive device is equipped with a depth sensor and a controller. The depth sensor is located on the drill grouting rod, and the controller is connected to the depth sensor and controls the working state of the drive device based on the data collected by the depth sensor.

3. The device for handling isolated boulders during tunnel boring machine (TBM) passage according to claim 1, characterized in that: The drive device is connected to drive the drilling grouting rod to drill down and rotate.

4. The device for handling isolated boulders during tunnel boring machine (TBM) passage according to claim 1, characterized in that: The grouting rod adopts an extendable assembly structure.

5. The device for handling isolated boulders during tunnel boring machine (TBM) passage according to claim 1, characterized in that: The grouting hole has a temporary sealing body, which seals the grouting hole during the drilling process of the grouting rod. When the grouting rod is grouting, the temporary sealing body is removed from the grouting hole under the grouting pressure.

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