A non-explosive construction tunnel face extrusion deformation testing device

Abstract

The application discloses a kind of non-blasting construction tunnel face extrusion deformation testing device, including mobile trolley, at least two measuring cylinders are fixedly connected on mobile trolley upper side, the mobile trolley is equipped with two lifting columns, lifting column upper end is fixedly connected support frame, support frame bottom is slidably connected sliding seat, sliding seat one side is fixedly connected drive motor, the main shaft of drive motor is fixedly connected telescopic cantilever, telescopic cantilever telescopic end is equipped with outer drill cylinder, outer drill cylinder end is threadedly connected circular ring, circular ring end is equipped with incisor.The present application is driven to face by mobile trolley, outer drill cylinder rotates and drills sample, sample is taken out together with outer drill cylinder, after sample is taken out, drive motor drives telescopic cantilever to rotate to vertical state, then lifting column descends, sample in outer drill cylinder is placed in the latex film of measuring cylinder, so as to facilitate rapid test in construction site, and two measuring cylinders are used, can be drilled from different positions of face sample, to facilitate improving test efficiency.

Description

Technical Field

[0001] This invention relates to the field of geotechnical testing equipment, and in particular to a testing device for extrusion deformation at the tunnel face during non-blasting construction. Background Technology

[0002] In recent years, with the rapid and efficient development of my country's national economy and urbanization, the urban population has grown rapidly, leading to increasingly serious urban traffic congestion. The construction of urban rail transit can effectively alleviate urban traffic pressure. Currently, due to its advantages over ordinary transportation, such as faster speed, larger carrying capacity, cleaner and more comfortable riding environment, and greater safety and punctuality, the subway has become one of the main modes of urban rail transit. When subway construction extends to older urban areas in the city center, the impact of surrounding buildings and underground municipal pipelines is unavoidable. In my country, the construction of subway station ancillary structures mostly adopts the open-cut method, with some pedestrian crossings constructed using the cut-and-cover method. With the increasing demands for safety and environmental protection across the country, in order to reduce the interference of subway construction in urban centers, especially older urban areas, and to reduce construction pollution, various provinces and cities in my country have begun to gradually promote non-blasting construction methods to replace traditional blasting. Non-blasting methods combine mechanical and manual excavation, minimizing the impact of subway tunnel construction on the surrounding environment. In non-blasting tunnel construction, personnel and equipment spend extended periods at the tunnel face, an area characterized by intense stress and high risk. Timely assessment of the stability of the rock mass at the tunnel face is crucial not only for ensuring the safety of personnel and equipment but also for improving the construction efficiency of subway tunnels. Displacement testing, such as extrusion deformation of the rock mass at the tunnel face, is an important means of understanding and assessing the stability of the tunnel face, and extrusion deformation testing devices are indispensable monitoring and measurement instruments.

[0003] A patent application (CN201410210387.3) discloses a testing device comprising a cylindrical pressure chamber formed by a sealed sidewall, a top cover, and a base; a hydraulic cylinder fixed in a groove in the middle of the upper surface of the base, with the piston of the hydraulic cylinder extending upward into the pressure chamber; an exhaust valve located near the sidewall of the top cover; a cylinder barrel with a diameter smaller than the hydraulic cylinder sealed in a cylinder groove in the middle of the bottom surface of the top cover, the cylinder groove having a vent hole extending out of the top cover; a displacement measuring rod connected to the piston of the cylinder barrel, the upper end of the displacement measuring rod extending out of the top cover and connected to a displacement dial gauge; and a water inlet valve located in the part of the base between the pressure chamber and the hydraulic cylinder. This device suffers from drawbacks such as difficulty in drilling samples, inability to perform rapid comparative experiments, inconvenience in installing the retrieved samples, and potential sample damage, thus affecting the testing process. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a non-explosive construction face extrusion deformation testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A non-explosive construction face extrusion deformation testing device includes a mobile trolley, with at least two measuring cylinders fixedly connected to the upper side of the mobile trolley. The mobile trolley is equipped with two lifting columns, with a support frame fixedly connected to the upper end of the lifting columns. A sliding seat is slidably connected to the bottom of the support frame. A drive motor is fixedly connected to one side of the sliding seat. A telescopic cantilever is fixedly connected to the main shaft of the drive motor. An external drill cylinder is provided at the telescopic end of the telescopic cantilever. A ring is threadedly connected to the end of the external drill cylinder, and the end of the ring is provided with cutting teeth.

[0007] The telescopic cantilever includes a sleeve, a hydraulic rod is fixedly connected inside the sleeve, a square rod is slidably connected to one end of the sleeve, and the telescopic end of the hydraulic rod is fixedly connected to the square rod.

[0008] A support plate is fixedly connected to the end of a square rod, and a first motor is fixedly connected to one side of the support plate. The outer drill barrel is rotatably connected to the support plate. A first gear is fixedly connected to the spindle of the first motor, and a second gear is fixedly connected to the end of the outer drill barrel. The first gear and the second gear mesh.

[0009] A support rod is fixedly connected to one side of the support plate, and a horizontal plate is fixedly connected to one end of the support rod. The horizontal plate is rotatably connected to the inner drill cylinder, which is coaxial with the outer drill cylinder. The main shaft of the first motor is fixedly connected to the first pulley, and a second pulley is fixedly connected to one end of the inner drill cylinder. A transmission belt is mounted on the first pulley and the second pulley.

[0010] A support rod is fixedly connected to one side of the casing, and a baffle is fixedly connected to the support rod. A first sealing plug is fixedly connected to the middle of one side of the baffle. The first sealing plug is corresponding to the inner hole of the inner drill barrel. A round rod is fixedly connected to each end of the baffle. A disc is provided at the end of the two round rods. The disc is rotatably and axially slidingly connected to the inner drill barrel. A second sealing plug is fixedly connected to one side of the disc. The second sealing plug is corresponding to the inner hole of the outer drill barrel.

[0011] The disc has two guide holes, and the rod passes through the guide holes and is slidably connected. A boss is provided in the middle of the rod, and a support spring is installed between the boss and the disc.

[0012] The square rod is provided with a through groove for avoidance. A side rod is fixedly connected to one side of the disc, and the side rod passes through the through groove. A column is fixedly connected to the upper side of the moving trolley, and the column is set corresponding to the side rod.

[0013] A side plate is fixedly connected to one side of the square rod, and the side plate is slidably connected to the square rod. A circular plate is fixedly connected to one end of the square rod, and a second spring is fixedly connected between the circular plate and the side plate. An inclined surface is provided at the other end of the square rod, and the inclined surface contacts the side rod.

[0014] The advantages of this invention are as follows: The non-explosive construction face extrusion deformation testing device provided by this invention uses a mobile trolley to travel to the face of the working face, the outer drill cylinder rotates to drill and extract the sample, and the sample is extracted together with the outer drill cylinder. After the sample is extracted, the drive motor drives the telescopic cantilever to rotate to a vertical position, and then the lifting column descends to place the sample in the outer drill cylinder into the latex film of the measuring cylinder. This facilitates rapid testing on the construction site. Moreover, the use of two measuring cylinders allows for the extraction of samples from different positions on the working face, which improves testing efficiency.

[0015] This invention allows the second sealing plug to separate from the outer drill cylinder by sliding the disc relative to the rod, facilitating the sample's detachment under gravity. Meanwhile, the first sealing plug remains in the inner drill cylinder, leaving residue from the sample opening inside. This residue is retained in the inner drill cylinder by negative pressure, preventing it from entering the measuring cylinder along with the outer drill cylinder. This eliminates the need for additional cleaning or allows for simple cleaning before proceeding to the next step, thereby improving the efficiency of sample extraction and installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the basic structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the external drill barrel after it has been verticalized according to the present invention;

[0018] Figure 3 This is a schematic diagram of the installation structure of the outer drill barrel in this invention;

[0019] Figure 4 yes Figure 3 A magnified view of point E in the image. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Example 1

[0022] like Figure 1-4 As shown, the present invention provides a non-explosive construction face extrusion deformation testing device, including a mobile trolley 1, with at least two measuring cylinders 2 fixedly connected to the upper side of the mobile trolley 1;

[0023] The structure of the measuring cylinder 2 adopts the structure disclosed in the test device and test method for the relationship between tunnel face constraint pressure and extrusion deformation with patent publication number CN104007247A;

[0024] Specifically, it includes a cylinder, an upper cover on the upper side of the cylinder, a cylinder barrel at the bottom of the upper cover, a dial indicator or displacement sensor on the upper side of the upper cover, and a latex film inside the cylinder.

[0025] The basic testing principle is as follows: the sample is placed inside the latex film, the cavity between the latex film and the cylinder is filled with water to simulate the surrounding rock pressure, an axial thrust is applied to the bottom of the sample to simulate axial pressure, and the push rod inside the cylinder moves outward to act on a dial gauge or displacement sensor to obtain the extrusion deformation.

[0026] The mobile trolley 1 is equipped with two lifting columns 12. The lifting columns 12 are hydraulically driven for lifting. The upper end of the lifting column 12 is fixedly connected to the support frame 13. The bottom of the support frame 13 is slidably connected to the sliding seat 14. The sliding seat 14 is driven to slide by a screw motor. One side of the sliding seat 14 is fixedly connected to the drive motor 15. The main shaft of the drive motor 15 is fixedly connected to the telescopic cantilever 3. The telescopic end of the telescopic cantilever 3 is equipped with an outer drill cylinder 4. The end of the outer drill cylinder 4 is threadedly connected to a ring 5. The end of the ring 5 is equipped with cutting teeth.

[0027] This invention involves a mobile trolley 1 moving to the working face, a lifting column 12 adjusting the height of the outer drill cylinder 4, and a sliding seat 14 sliding to a position at the bottom of the support frame 13. A telescopic cantilever 3 then pushes the outer drill cylinder 4 to the working face. The outer drill cylinder 4 rotates to drill the sample, and additionally drills a hole at one end of the sample for placing the cylinder of the measuring cylinder 2. A process hole is drilled downwards from the ground surface. After the sample from the outer drill cylinder 4 reaches the process hole, it facilitates separation of the sample tail end. The sample is then removed along with the outer drill cylinder 4. After removing the sample, a wrench is used to remove the end ring 5, and the sample end face is manually trimmed. After sample extraction, the drive motor 15 drives the telescopic cantilever 3 to rotate to a vertical position. Subsequently, the lifting column 12 descends, placing the sample from the outer drill cylinder 4 into the latex film of the measuring cylinder 2. This facilitates rapid testing on the construction site. Furthermore, the use of two measuring cylinders 2 allows for sample drilling from different positions on the working face, improving testing efficiency.

[0028] Example 2

[0029] Since the sample in Example 1 also needs to have holes drilled in it to facilitate the placement of the cylinder at the bottom of the measuring cylinder 2, the drill bit inside the sample is prone to deflection. Therefore, this example discloses a new implementation method.

[0030] In this embodiment, as Figure 1-4 As shown, the telescopic cantilever 3 includes a sleeve 31, a hydraulic rod is fixedly connected inside the sleeve 31, a square rod 32 is slidably connected to one end of the sleeve 31, and the telescopic end of the hydraulic rod is fixedly connected to the square rod 32.

[0031] The square rod 32 is fixedly connected to the end of the support plate 6. The first motor 61 is fixedly connected to one side of the support plate 6. The outer drill barrel 4 is rotatably connected to the support plate 6. The main shaft of the first motor 61 is fixedly connected to the first gear 62. The end of the outer drill barrel 4 is fixedly connected to the second gear 63. The first gear 62 and the second gear 63 mesh.

[0032] A support rod 64 is fixedly connected to one side of the support plate 6, and a horizontal plate 65 is fixedly connected to one end of the support rod 64. The horizontal plate 65 is rotatably connected to the inner drill barrel 7. The inner drill barrel 7 is coaxial with the outer drill barrel 4. The main shaft of the first motor 61 is fixedly connected to the first pulley 71. One end of the inner drill barrel 7 is fixedly connected to the second pulley 72. A transmission belt 73 is installed on the first pulley 71 and the second pulley 72.

[0033] Example 3

[0034] In Example 2, since both ends of the inner drill cylinder 7 and the outer drill cylinder 4 are open, when the cylinder is vertical, the sample will slide out of the outer drill cylinder 4, which cannot guarantee that the sample will be transferred smoothly into the measuring cylinder 2. In this example, a structure is disclosed to prevent the sample from slipping out of the outer drill cylinder 4.

[0035] Specifically, such as Figure 1-4 As shown, a support rod 8 is fixedly connected to one side of the casing 31, and a baffle 81 is fixedly connected to the support rod 8. A first sealing plug 82 is fixedly connected to the middle of one side of the baffle 81. The first sealing plug 82 is correspondingly set to the inner hole of the inner drill barrel 7. A round rod 83 is fixedly connected to each end of the baffle 81. A disc 84 is provided at the end of the two round rods 83. The disc 84 is rotatably and axially slidingly connected to the inner drill barrel 7. A second sealing plug 85 is fixedly connected to one side of the disc 84. The second sealing plug 85 is correspondingly set to the inner hole of the outer drill barrel 4.

[0036] After the outer drill barrel 4 drills the sample, the square rod 32 of the telescopic cantilever 3 retracts, and both the inner drill barrel 7 and the outer drill barrel 4 move toward the casing 31. Correspondingly, the first sealing plug 82 blocks one end of the inner drill barrel 7, and the second sealing plug 85 blocks one end of the outer drill barrel 4. The sample is in contact with the inner wall of the outer drill barrel 4. If the gap is large, a plastic sheet is embedded between the sample and the outer drill barrel 4 at the other end. After the outer drill barrel 4 is vertical, the sample can remain stably in the outer drill barrel 4 due to the external atmospheric pressure. This makes it easy to move the sample stably into the measuring cylinder 2 without sample breakage or damage from manual movement. This makes it portable and fast. Compared with manual sampling and testing, it can significantly improve efficiency and ensure that the test is closer to the actual working face condition.

[0037] Example 4

[0038] Furthermore, such as Figure 1-4As shown, the disc 84 has two guide holes, and the round rod 83 passes through the guide holes and is slidably connected. A boss 831 is provided in the middle of the round rod 83, and a support spring 832 is installed between the boss 831 and the disc 84. The square rod 32 has a clearance groove 321. A side rod 9 is fixedly connected to one side of the disc 84. The side rod 9 passes through the groove 321. A column 91 is fixedly connected to the upper side of the moving trolley 1. The column 91 is set corresponding to the side rod 9. A side plate 92 is fixedly connected to one side of the square rod 32. The side plate 92 is slidably connected to the square rod 93. A circular plate 94 is fixedly connected to one end of the square rod 93. A second spring 95 is fixedly connected between the circular plate 94 and the side plate 92. An inclined surface 96 is provided at the other end of the square rod 93. The inclined surface 96 contacts the side rod 9.

[0039] In this embodiment, the outer drill cylinder 4, with its cutting teeth removed, pushes the latex film of the measuring cylinder 2 downwards. As the outer drill cylinder 4 descends, the side rod 9 is blocked after contacting the column 91. As the outer drill cylinder 4 continues to descend, the disc 84 slides relative to the circular rod 83, causing the second sealing plug 85 to separate from the outer drill cylinder 4. This facilitates the sample falling off under gravity, while the first sealing plug 82 still blocks the inner drill cylinder 7. Residue from the sample opening will remain in the inner drill cylinder 7. This residue is retained in the inner drill cylinder 7 by negative pressure, preventing it from entering the measuring cylinder 2 along with the outer drill cylinder 4. Thus, no additional cleaning is required, or only simple cleaning is needed, allowing for quick progress in the next step of the work, thereby improving the efficiency of sample digging and installation.

[0040] The working principle of this invention is as follows:

[0041] This invention uses a mobile trolley 1 to travel to the working face, where an outer drill cylinder 4 rotates to drill and extract a sample. The sample is then extracted along with the outer drill cylinder 4. After the sample is extracted, a drive motor 15 drives a telescopic cantilever 3 to rotate to a vertical position. Subsequently, a lifting column 12 descends, placing the sample from the outer drill cylinder 4 into the latex film of a measuring cylinder 2. This facilitates rapid testing on the construction site. Furthermore, the use of two measuring cylinders 2 allows for the extraction of samples from different positions on the working face, thereby improving testing efficiency.

[0042] Furthermore, by sliding the disc 84 relative to the rod 83, the second sealing plug 85 is separated from the outer drill cylinder 4, which facilitates the sample falling off under gravity. Meanwhile, the first sealing plug 82 still blocks the inner drill cylinder 7, and the residue from the sample opening will remain in the inner drill cylinder 7. It is kept in the inner drill cylinder 7 by the negative pressure, preventing the residue from entering the measuring cylinder 2 along with the outer drill cylinder 4. Therefore, no additional cleaning is required or only simple cleaning is needed to quickly proceed to the next step, thereby improving the efficiency of sample digging and installation.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-blasting tunnel face extrusion deformation testing device, comprising a mobile trolley (1), wherein at least two measuring cylinders (2) are fixedly connected to the upper side of the mobile trolley (1), characterized in that: The mobile trolley (1) is equipped with two lifting columns (12). The upper end of the lifting column (12) is fixedly connected to the support frame (13). The bottom of the support frame (13) is slidably connected to the sliding seat (14). The side of the sliding seat (14) is fixedly connected to the drive motor (15). The main shaft of the drive motor (15) is fixedly connected to the telescopic cantilever (3). The telescopic end of the telescopic cantilever (3) is equipped with an outer drill cylinder (4). The end of the outer drill cylinder (4) is threadedly connected to a ring (5). The end of the ring (5) is equipped with cutting teeth. The telescopic cantilever (3) includes a sleeve (31), a hydraulic rod is fixedly connected inside the sleeve (31), a square rod (32) is slidably connected to one end of the sleeve (31), and the telescopic end of the hydraulic rod is fixedly connected to the square rod (32). A support plate (6) is fixedly connected to the end of a square rod (32), and a first motor (61) is fixedly connected to one side of the support plate (6). The outer drill barrel (4) is rotatably connected to the support plate (6). The main shaft of the first motor (61) is fixedly connected to a first gear (62), and a second gear (63) is fixedly connected to the end of the outer drill barrel (4). The first gear (62) and the second gear (63) mesh with each other. A support rod (64) is fixedly connected to one side of the support plate (6), and a horizontal plate (65) is fixedly connected to one end of the support rod (64). The horizontal plate (65) is rotatably connected to the inner drill cylinder (7). The inner drill cylinder (7) is coaxial with the outer drill cylinder (4). The main shaft of the first motor (61) is fixedly connected to the first pulley (71). One end of the inner drill cylinder (7) is fixedly connected to the second pulley (72). A transmission belt (73) is mounted on the first pulley (71) and the second pulley (72). A support rod (8) is fixedly connected to one side of the casing (31), and a baffle (81) is fixedly connected to the support rod (8). A first sealing plug (82) is fixedly connected to the middle of one side of the baffle (81). The first sealing plug (82) is correspondingly set to the inner hole of the inner drill barrel (7). A round rod (83) is fixedly connected to each end of the baffle (81). A disc (84) is provided at the end of the two round rods (83). The disc (84) is rotatably and axially slidingly connected to the inner drill barrel (7). A second sealing plug (85) is fixedly connected to one side of the disc (84). The second sealing plug (85) is correspondingly set to the inner hole of the outer drill barrel (4). The disc (84) is provided with two guide holes, the round rod (83) passes through the guide holes and is slidably connected, the round rod (83) is provided with a boss (831) in the middle, and a support spring (832) is installed between the boss (831) and the disc (84); The square rod (32) is provided with a through groove (321) for avoidance. The side rod (9) is fixedly connected to one side of the disc (84). The side rod (9) passes through the through groove (321). The upper side of the moving trolley (1) is fixedly connected to a column (91). The column (91) is set corresponding to the side rod (9).

2. The extrusion deformation testing device for non-blasting tunnel face according to claim 1, characterized in that: The square rod (32) is fixedly connected to a side plate (92) on one side. The side plate (92) is slidably connected to the square rod (93). One end of the square rod (93) is fixedly connected to a circular plate (94). A second spring (95) is fixedly connected between the circular plate (94) and the side plate (92). The other end of the square rod (93) is provided with an inclined surface (96), which contacts the side rod (9).

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