Outdoor test device and method for simulating automatic rotation of shield cutter head

Abstract

The invention relates to an outdoor test device and method for simulating automatic rotation of a shield cutterhead, the device comprises a central positioning rod, a plurality of connecting rods, a plurality of walking trolleys, a plurality of supporting brackets and a metal sheet, the central positioning rod is fixed on the ground, one end of each connecting rod is rotatably connected with the central positioning rod, and the other end of each connecting rod is rotatably connected with the metal sheet. The supporting brackets are fixed on the connecting rod, the metal sheet is supported by a plurality of supporting brackets fixed on the connecting rod, and the two sides of each supporting bracket are connected with supporting wheels; under the traction effect of the connecting rods, the walking trolleys drive the connecting rods to rotate forwards and backwards with the center positioning rod as the circle center, the metal sheets on the supporting supports are driven to rotate along with the connecting rods, and rotation of spokes and a panel in a shield cutter disc is simulated. Compared with the prior art, the characteristic that the circular shield cutter disc rotates around the center is effectively simulated, and the device has the advantages of being simple in structure, high in driving efficiency and the like.

Description

Technical Field

[0001] This invention relates to the field of shield cutterhead testing technology, and in particular to an outdoor testing device and method for simulating the automatic rotation of a shield cutterhead. Background Technology

[0002] Due to the complex and variable geological environment and the intricate urban structures, tunnel boring machines (TBMs) are prone to encountering unknown obstacles such as boulders and pile foundations during tunnel construction, which can adversely affect the normal excavation process. Therefore, advanced detection technologies are needed to conduct real-time monitoring during TBM excavation. Domestic and international advanced technologies for TBMs mainly include seismic wave methods, electrical resistivity tomography (EDT) methods, and ground-penetrating radar (GPR). Research is needed on mounting GPR on the TBM cutterhead for advanced detection. Mechanical research and scaled-down indoor model tests have been conducted to address the issue of mounting ground-penetrating radar antennas on the cutterhead of a 6-meter diameter subway tunnel shield. For example, invention publication CN116717266A discloses an indoor test device and method for shield tunnel advance prediction, comprising: multiple interconnected unit wooden boxes, the inner side of which is lined with a waterproof layer; a simulated soil layer housed within the unit wooden boxes; and obstacles, including metal and concrete embedded parts, embedded within the simulated soil layer, spaced apart. This scheme uses an indoor model box to test the detection effectiveness of different detection methods on obstacles such as boulders.

[0003] However, the detection effectiveness of ground-penetrating radar (GPR) technology and other geophysical exploration techniques such as acoustic waves is related to the frequency of the electromagnetic or mechanical waves used. Different frequencies of electromagnetic or mechanical waves have different detection depths and attenuation rates. To improve the detection depth, lower frequency electromagnetic or mechanical waves should be selected. This will lead to an increase in the size of the signal transmitting device. Indoor scaled-down model tests are no longer sufficient to verify the actual detection capabilities of GPR and other detection devices. Therefore, it is necessary to build an outdoor full-scale model test device to conduct outdoor tests.

[0004] The 6-meter diameter TBM advanced detection test conducted by the European NeTTUN research project still uses the traditional method of manually dragging the ground-penetrating radar antenna. This method is time-consuming and labor-intensive, and cannot simulate the complex characteristics of the spoke and panel structure of the tunnel boring machine (TBM) cutterhead. TBM cutterheads are made of pure metal, with diameters ranging from 6 to 15 meters. Their actual weight is enormous; a 6-meter diameter TBM cutterhead commonly used in subway tunnels weighs tens of tons, while a 15-meter diameter TBM cutterhead used in ultra-large diameter highway tunnels can weigh hundreds of tons. It is clearly difficult to place a full-scale TBM cutterhead horizontally on the ground and conduct rotational tests with various detection devices. If a scaled-down TBM cutterhead is used, the reduced cutterhead size will also reduce the size of the mounted equipment, making it difficult to test the detection effects of different detection devices on electromagnetic or mechanical waves of the actual frequencies.

[0005] Therefore, it is necessary to design a test device that can simulate the structure and circumferential rotation characteristics of shield cutterheads of arbitrary diameters, and is also efficient, lightweight, and easy to mount with different detection equipment. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art by providing an outdoor test device and method for simulating the automatic rotation of a shield cutterhead that can simulate the structure and circumferential rotation characteristics of shield cutterheads of arbitrary diameters, and is also highly efficient, lightweight, and easy to carry with different detection devices.

[0007] The objective of this invention can be achieved through the following technical solutions: An outdoor test device for simulating the automatic rotation of a tunnel boring machine cutterhead includes a central positioning rod, connecting rods, a traveling trolley, support brackets, and a thin metal plate. The central positioning rod is fixed to the ground. There are multiple connecting rods, traveling trolleys, and support brackets. Each connecting rod is rotatably connected to the central positioning rod at one end and to the corresponding traveling trolley at the other end. The support brackets are fixed to the connecting rods. The thin metal plate is supported by multiple support brackets fixed to the connecting rods and is used to simulate the panel in the structure of the tunnel boring machine cutterhead. Support wheels are connected to both sides of the support brackets. Under the traction of the connecting rod, each traveling trolley drives the connecting rod to rotate in both directions around the central positioning rod, causing the metal plate on the support bracket to rotate accordingly, simulating the rotation of the spokes and panels in the shield cutterhead.

[0008] Furthermore, the central positioning rod includes a stainless steel needle, a slip ring, and a fixing knob. The stainless steel needle is used to insert into the soil layer to fix the rotation center of the entire device. The slip ring and the fixing knob are both fitted onto the stainless steel needle. The slip ring has an interface for connecting to the connecting rod. The bottom of the slip ring is supported by the fixing knob. The fixing knob's fixed position on the stainless steel needle is adjustable.

[0009] Furthermore, the connecting rod includes multiple segments of first carbon fiber rods connected in sequence. Adjacent segments of the first carbon fiber rods are connected to each other by a round tube connector. There is an opening at the overlap of the first carbon fiber rod and the round tube connector, so that the first carbon fiber rod and the round tube connector can be fixed by a pin through the opening.

[0010] Furthermore, the number of the first carbon fiber rods is set according to the diameter of the shield cutterhead to be simulated.

[0011] Furthermore, the support bracket includes a second carbon fiber rod and multiple fasteners. The multiple fasteners are sequentially connected to the second carbon fiber rod. The fastener located in the middle is connected to both the second carbon fiber rod and the first carbon fiber rod. The bottoms of the fasteners located on both sides are respectively fixed with corresponding support wheels.

[0012] Furthermore, the shape of the fastener is square, rectangular, elliptical, or irregular.

[0013] Furthermore, the metal sheet is provided with openings at corresponding positions to the support bracket, and the metal sheet and the mounting bracket are fixed by nylon cable ties through the openings.

[0014] Furthermore, the trolley is a unicycle with a main wheel, the drive mechanism of the main wheel is connected to a mobile power source, and auxiliary omnidirectional wheels for maintaining the balance of the unicycle are installed on both sides of the main wheel. The trolley is provided with a connection port connected to the connecting rod.

[0015] Furthermore, the outdoor testing device also includes a ground-penetrating radar antenna or an ultrasonic probe, which is suspended or tied to a support frame by nylon cable ties.

[0016] The present invention also provides an outdoor testing method for an outdoor testing device for simulating the automatic rotation of a tunnel boring machine cutterhead as described above, comprising the following steps: Insert the center positioning rod into the soil layer; Based on the diameter of the shield cutterhead to be simulated, select connecting rods of corresponding lengths, connect them around the center positioning rod, and set up corresponding traveling trolleys. A support bracket is installed on the connecting rod, and the thin metal plate is installed on the support bracket; According to the test requirements, a ground-penetrating radar antenna and / or an ultrasonic probe are mounted on the support bracket to simulate the automatic rotation detection effect test of different detection devices under the condition of carrying a shield cutterhead; The traveling trolley is started, and after it moves, it rotates around the central positioning rod, which drives the support bracket on the connecting rod to rotate around the central positioning rod as well, thus simulating the automatic rotation of the shield cutterhead.

[0017] Compared with the prior art, the present invention has the following advantages: (1) The present invention simulates the rotating device of the shield cutterhead by means of a central positioning rod, a connecting rod and a traveling trolley. The traction of the connecting rod constrains the movement trajectory of the traveling trolley to a circle, effectively realizing the characteristic of simulating the rotation of a circular shield cutterhead around the center. Furthermore, the length of the connecting rod can be adjusted to simulate a cutterhead of any diameter. A support bracket with a support wheel is used to stably support the thin metal plate to simulate the rotation of the spokes and panels in the shield cutterhead. The support bracket can be equipped with radar antennas, ultrasonic probes and other detection devices, which can simulate the automatic rotation detection effect test of different detection devices when the shield cutterhead is mounted.

[0018] (2) The present invention has a simple structure, high driving efficiency, and is easy to disassemble, transport and install, avoiding the transportation and movement problems caused by the weight of the actual size shield cutterhead, which is as high as tens of tons.

[0019] (3) The present invention can simulate the characteristic of repeated rotation around the center during actual shield tunneling, and is also adjustable in size, lightweight, efficient and easy to move. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an outdoor test device for simulating the automatic rotation of a tunnel boring machine cutterhead, provided in an embodiment of the present invention. Figure 2 This is a perspective view of a central positioning rod provided in an embodiment of the present invention; Figure 3 This is a perspective view of a connecting rod provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of a walking vehicle provided in an embodiment of the present invention; Figure 5 This is a perspective view of a support bracket provided in an embodiment of the present invention; In the diagram, 1. Center positioning rod; 101. Stainless steel needle; 102. Slip ring; 103. Fixing knob; 2. Connecting rod; 201. First carbon fiber rod; 202. Round tube connector; 203. Pin; 3. Walking trolley; 301. Power supply; 302. Main wheel; 303. Auxiliary omnidirectional wheel; 304. Connection port; 4. Support bracket; 401. Second carbon fiber rod; 402. Fixing component; 403. Support wheel; 5. Metal sheet. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0027] Example 1 like Figure 1 As shown, this embodiment provides an outdoor test device for simulating the automatic rotation of a tunnel boring machine cutterhead, including a central positioning rod 1, a connecting rod 2, a traveling trolley 3, a support bracket 4, and a metal plate 5. The central positioning rod 1 is fixed to the ground. There are multiple connecting rods 2, traveling trolleys 3, and support brackets 4. Each connecting rod 2 is rotatably connected to the central positioning rod 1 at one end and to the corresponding traveling trolley 3 at the other end. The support brackets 4 are fixed to the connecting rods 2. The metal plate 5 is supported by multiple support brackets 4 fixed to the connecting rods 2 and is used to simulate the panel in the structure of the tunnel boring machine cutterhead. Support wheels 403 are connected to both sides of the support brackets 4. Under the traction of the connecting rod 2, each traveling trolley 3 drives the connecting rod 2 to rotate in both directions around the central positioning rod 1, causing the metal plate 5 on the support bracket 4 to rotate accordingly, simulating the rotation of the spokes and panels in the shield cutterhead.

[0028] Among them: the number of connecting rod 2 and traveling trolley 3 is one or more, which can be flexibly set according to the simulated shield cutterhead; the number of support brackets 4 mounted on the connecting rod 2 is one or more.

[0029] The walking trolley 3 is equipped with a mobile power supply and rotates bidirectionally around the central positioning rod 1.

[0030] The number of connecting rods and traveling trolleys should be at least one, and can be flexibly set according to the structural characteristics of the simulated shield cutterhead.

[0031] The connecting rod is equipped with at least one support bracket.

[0032] Preferably, multiple support brackets on the same connecting rod are parallel to each other and all perpendicular to the connecting rod to facilitate installation.

[0033] Preferably, the spacing between the support brackets on the same connecting rod is determined by a uniform distribution method based on the length of the connecting rod and the number of support brackets.

[0034] Preferably, the minimum distance between the support bracket and the center positioning rod and the trolley is such that it does not affect the rotation of the support bracket and the trolley.

[0035] Specifically, such as Figure 2 As shown, the center positioning rod 1 includes a stainless steel needle 101, a slip ring 102, and a fixing knob 103. The stainless steel needle 101 is used to insert into the soil layer to fix the rotation center of the entire device. The slip ring 102 and the fixing knob 103 are both sleeved on the stainless steel needle 101. The slip ring 102 is provided with an interface for connecting to the connecting rod 2. The bottom of the slip ring 102 is supported by the fixing knob 103. The fixed position of the fixing knob 103 on the stainless steel needle 101 is adjustable.

[0036] Specifically, the stainless steel needle 101 is inserted into the soil to fix the rotation center of the device. The slip ring 102 has an interface for connecting to the connecting rod 2. The slip ring 102 is fitted onto the stainless steel needle 101 and rotates freely to ensure no frictional resistance between the connecting rod 2 and the stainless steel needle 101 during rotation. The slip ring 102's height on the stainless steel needle 101 is freely adjustable. Its height is adjusted at the bottom by a fixing knob 102, and tightening the fixing knob 103 fixes the height position of the slip ring 102.

[0037] After fixing the position of the center positioning rod 1, connect one end of the connecting rod 2 to the interface on the slip ring 102 on the center positioning rod 1.

[0038] The connecting rod 2 includes multiple segments of first carbon fiber rods 201 connected in sequence. Adjacent segments of the first carbon fiber rods 201 are connected to each other by a round tube connector 202. There is an opening at the overlap of the first carbon fiber rods 201 and the round tube connector 202, so that the first carbon fiber rods 201 and the round tube connector 202 can be fixed by a pin 203 through the opening.

[0039] The number of the first carbon fiber rods 201 is set according to the diameter of the shield cutterhead to be simulated.

[0040] like Figure 3As shown, in this embodiment, the connecting rod 2 is composed of four sections of first carbon fiber rod 201. There is a round tube connector 202 between two sections of first carbon fiber rod 201. There is an opening at the overlap between the first carbon fiber rod 201 and the round tube connector 202. The rod is fixed by inserting two pins 203 into the opening.

[0041] The support bracket 4 includes a second carbon fiber rod 401 and multiple fasteners 402. The multiple fasteners 402 are connected to the second carbon fiber rod 401 in sequence. The fastener 402 located in the middle is connected to the second carbon fiber rod 401 and the first carbon fiber rod 201 respectively. The bottom of the fasteners 402 located on both sides is fixed with corresponding support wheels 403 respectively.

[0042] The shapes of the fasteners include, but are not limited to, square, rectangular, oval, and irregular shapes.

[0043] Optionally, the metal sheet 5 and the support bracket 4 are provided with openings at corresponding positions, and the metal sheet 5 and the mounting bracket are fixed by nylon cable ties through the openings.

[0044] Optionally, the outdoor test device may also include a ground-penetrating radar antenna or an ultrasonic probe. The ground-penetrating radar antenna and the ultrasonic probe are suspended or tied to the support bracket 4 by nylon cable ties, but the fixing method includes, but is not limited to, cable tie suspension and cable tie binding.

[0045] The trolley 3 is a unicycle with a main wheel 302. The drive mechanism of the main wheel 302 is connected to a mobile power supply 301. Auxiliary universal wheels 303 for maintaining the balance of the unicycle are installed on both sides of the main wheel 302. The trolley 3 is provided with a connection port 304 connected to the connecting rod 2.

[0046] In this embodiment, while connecting the four segments of the first carbon fiber rod 201 of the connecting rod 2, the support bracket 4 is fixed to the connecting rod 2 according to its position. Figure 5 As shown, three square fasteners 403 are installed on the support bracket 4. The square fastener 402 in the middle is used to fix the second carbon fiber rod 401 of the support bracket 4 and the first carbon fiber rod 201 of the connecting rod 2; the square fasteners 401 on both sides are used to fix the support wheel 403.

[0047] When a metal plate 5 or a ground-penetrating radar antenna or other detection equipment is installed on the second carbon fiber rod 401, the connecting rod 2 will bend downward under the action of gravity. At this time, the support wheel 403 will play the role of supporting and controlling the deformation.

[0048] After the first carbon fiber rods 201 are connected one by one, one end of the last first carbon fiber rod 201 is connected to the interface 304 on the side of the traveling trolley 3.

[0049] like Figure 4 As shown, the walking trolley 3 is a unicycle with a main wheel 302 and is equipped with a mobile power supply 301, so it does not need an external power supply to avoid the problem of power cord tangling during the rotation of the unicycle.

[0050] Example 2 This embodiment also provides an outdoor testing method for an outdoor testing device simulating the automatic rotation of a tunnel boring machine cutterhead, as described in Embodiment 1, comprising the following steps: Insert the center positioning rod 1 into the soil layer; Based on the diameter of the shield cutterhead to be simulated, select connecting rods 2 of corresponding length, connect them around the center positioning rod 1, and set up corresponding traveling trolleys 3. A support bracket 4 is installed on the connecting rod 2, and the metal sheet 5 is installed on the support bracket 4. According to the test requirements, a ground-penetrating radar antenna and / or an ultrasonic probe are mounted on the support bracket 4 to simulate the automatic rotation detection effect test of different detection devices under the condition of carrying the shield cutterhead; Start the traveling trolley 3. After the traveling trolley 3 moves, it rotates around the central positioning rod 1, which drives the support bracket 4 on the connecting rod 2 to rotate around the central positioning rod 1 as well, thereby simulating the automatic rotation of the shield cutterhead.

[0051] That is, when the mobile power supply 301 on the traveling trolley 3 is started, the main wheel 302 begins to move under the drive of the motor. The auxiliary universal wheel 303 determines the direction of movement under the drive of the main wheel 302 and maintains balance when the main wheel 302 encounters uneven ground and wobbles back and forth. Due to the traction of the connecting rod 2, the traveling trolley 3 rotates around the central positioning rod 1 after moving, which drives the support bracket 4 on the connecting rod 2 to rotate around the central positioning rod 1 as well. This simulates the automatic rotation of the shield cutterhead, solving the problem that the real shield cutterhead is too heavy to use and the scaled-down cutterhead cannot actually carry the detection equipment.

[0052] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An outdoor test device for simulating the automatic rotation of a tunnel boring machine cutterhead, characterized in that, The device includes a central positioning rod (1), a connecting rod (2), a traveling trolley (3), a support bracket (4), and a metal plate (5). The central positioning rod (1) is fixed to the ground. There are multiple connecting rods (2), traveling trolleys (3), and support brackets (4). Each connecting rod (2) is rotatably connected to the central positioning rod (1) at one end and connected to the corresponding traveling trolley (3) at the other end. The support brackets (4) are fixed on the connecting rods (2). The metal plate (5) is supported by multiple support brackets (4) fixed on the connecting rods (2) and is used to simulate the panel in the shield cutterhead structure. Support wheels (403) are connected to both sides of the support brackets (4). Under the traction of the connecting rod (2), each traveling trolley (3) drives the connecting rod (2) to rotate and move in both directions around the center positioning rod (1), causing the metal plate (5) on the support bracket (4) to rotate accordingly, simulating the rotation of the spokes and panels in the shield cutterhead.

2. The outdoor test device for simulating automatic rotation of a tunnel boring machine cutterhead according to claim 1, characterized in that, The center positioning rod (1) includes a stainless steel needle (101), a slip ring (102), and a fixing knob (103). The stainless steel needle (101) is used to insert into the soil layer to fix the rotation center of the entire device. The slip ring (102) and the fixing knob (103) are both sleeved on the stainless steel needle (101). The slip ring (102) is provided with an interface for connecting the connecting rod (2). The bottom of the slip ring (102) is supported by the fixing knob (103). The fixing position of the fixing knob (103) on the stainless steel needle (101) is adjustable.

3. The outdoor test device for simulating automatic rotation of a tunnel boring machine cutterhead according to claim 1, characterized in that, The connecting rod (2) includes multiple segments of first carbon fiber rods (201) connected in sequence. Adjacent segments of first carbon fiber rods (201) are connected to each other by a round tube connector (202). There is an opening at the overlap of the first carbon fiber rod (201) and the round tube connector (202) so that the first carbon fiber rod (201) and the round tube connector (202) can be fixed by a pin (203) through the opening.

4. The outdoor test device for simulating automatic rotation of a tunnel boring machine cutterhead according to claim 3, characterized in that, The number of the first carbon fiber rods (201) is set according to the diameter of the shield cutterhead to be simulated.

5. The outdoor test device for simulating automatic rotation of a tunnel boring machine cutterhead according to claim 3, characterized in that, The support bracket (4) includes a second carbon fiber rod (401) and multiple fasteners (402). The multiple fasteners (402) are connected to the second carbon fiber rod (401) in sequence. The fastener (402) in the middle is connected to the second carbon fiber rod (401) and the first carbon fiber rod (201) respectively. The bottom of the fasteners (402) on both sides is fixed with corresponding support wheels (403).

6. The outdoor test device for simulating automatic rotation of a tunnel boring machine cutterhead according to claim 5, characterized in that, The shape of the fastener (402) is square, rectangular, elliptical or irregular.

7. The outdoor test device for simulating automatic rotation of a tunnel boring machine cutterhead according to claim 1, characterized in that, The metal sheet (5) and the support bracket (4) are provided with openings at corresponding positions, and the metal sheet (5) and the mounting bracket are fixed by nylon cable ties through the openings.

8. The outdoor test device for simulating automatic rotation of a tunnel boring machine cutterhead according to claim 1, characterized in that, The walking trolley (3) is a unicycle with a main wheel (302). The drive mechanism of the main wheel (302) is connected to a mobile power supply (301). Auxiliary universal wheels (303) for maintaining the balance of the unicycle are installed on both sides of the main wheel (302). The walking trolley (3) is provided with a connection port (304) connected to the connecting rod (2).

9. The outdoor test device for simulating automatic rotation of a tunnel boring machine cutterhead according to claim 1, characterized in that, The outdoor test device also includes a ground-penetrating radar antenna or an ultrasonic probe, which is suspended or tied to a support bracket (4) by nylon cable ties.

10. An outdoor testing method for an outdoor testing device simulating automatic rotation of a tunnel boring machine cutterhead as described in any one of claims 1-9, characterized in that, Includes the following steps: Insert the center positioning rod (1) into the soil layer; According to the diameter of the shield cutterhead to be simulated, select the corresponding length of connecting rod (2), connect it around the center positioning rod (1), and set the corresponding traveling trolley (3). A support bracket (4) is set on the connecting rod (2), and a metal sheet (5) is installed on the support bracket (4); According to the test requirements, a ground-penetrating radar antenna and / or an ultrasonic probe are mounted on the support bracket (4) to simulate the automatic rotation detection effect test of different detection devices under the condition of mounting the shield cutterhead; Start the traveling trolley (3). After the traveling trolley (3) moves, it rotates around the central positioning rod (1), which drives the support bracket (4) on the connecting rod (2) to rotate around the central positioning rod (1) in the same way, thereby simulating the automatic rotation of the shield cutterhead.

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