Vertical pipe jacking test system and method based on multi-parameter dynamic cooperative control

Abstract

The invention discloses a vertical pipe jacking test system and method based on multi-parameter dynamic cooperative control, and the system comprises a vertical pipe jacking device and a model box, the vertical pipe jacking device comprises a bottom plate, and the bottom plate is provided with a first motor and a second motor; the output end of the first motor is connected with one end of the central rotating rod, and the other end of the central rotating rod is connected with the cutter head; the first motor drives the central rotating rod to drive the cutterhead to rotate, so that the process that the cutterhead cuts a soil body in vertical pipe jacking construction is simulated; a spiral blade is mounted on the central rotating rod, and a soil outlet is formed in the tail end of the spiral blade; the second motor drives the ball screw, and the ball screw is connected with the lifting plate and the top plate, so that the soil body tunneling process in the vertical pipe jacking construction is simulated; the model box is used for containing a test soil body, and an opening in the bottom of the model box is opposite to and coaxial with the cutter head in the vertical pipe jacking device.

Description

Technical Field

[0001] This invention belongs to the field of underground engineering technology, and in particular relates to a vertical pipe jacking test system and method based on multi-parameter dynamic collaborative control. Background Technology

[0002] Vertical shafts, serving as working shafts, ventilation shafts, and air-raid shelter shafts, play a crucial role in the development of urban rail transit, integrated utility tunnels, and underground spaces. Currently, most vertical shaft construction employs the open-cut method, which occupies surface space for extended periods, obstructs road traffic, and has low construction efficiency. To address this, the vertical pipe jacking method has been proposed. As a novel vertical shaft construction method, vertical pipe jacking involves opening a tunnel above an existing horizontal tunnel and excavating vertically from the underground tunnel to the surface to construct the shaft. This method significantly improves construction efficiency, reduces time spent on surface traffic, minimizes environmental impact, and has broad application prospects. Currently, research on vertical pipe jacking is limited both domestically and internationally, and existing vertical pipe jacking technology is still in the research and exploration stage. During vertical pipe jacking construction, the stress on the soil above the pipe changes with decreasing burial depth, which differs significantly from horizontal pipe jacking. To ensure safer and more efficient vertical pipe jacking operations, it is essential to conduct vertical pipe jacking model tests to explore the stress and deformation mechanism of the soil under the combined effects of cutterhead rotation speed and jacking speed.

[0003] Similar construction methods to the vertical pipe jacking method include the vertical jacking method and the upward tunneling shield method. The vertical jacking method is mainly used in coastal and riverine water intake and drainage pipeline projects. It is suitable for situations where the entire shaft structure is prefabricated and rapid shaft formation is required. It is a shaft construction process in which prefabricated pipe sections are directly pushed into the soil within a pre-constructed horizontal tunnel using jacking equipment, without cutting the soil. However, excessive jacking force may cause deformation and cracking of the jacking riser and instability of the horizontal tunnel; insufficient jacking force will prevent successful jacking. The upward tunneling shield method involves the cutterhead of the upward-facing shield machine cutting through the soil to achieve upward tunneling, and finally assembling the segments at the tail of the shield to form a shaft.

[0004] To more realistically simulate the vertical pipe jacking construction process and explore the stress and deformation mechanism of the soil during vertical pipe jacking, Chinese patent CN112112653A discloses a vertical pipe jacking simulation device and method. The shortcomings of this solution are: 1) The tunneling head has a simple structure, and the cutterhead cannot be installed or replaced at the tunneling head position. It only cuts the soil through the tunneling head, which simplifies the process of the cutterhead cutting the soil during vertical pipe jacking construction.

[0005] 2) A liquid bladder is installed inside the pipe jacking machine. After the soil is cut, it enters the machine and the liquid bladder is squeezed to expel the liquid. The amount of soil removed is indirectly measured by measuring the volume of the expelled liquid. However, this indirect measurement of soil removal is prone to error, and the cut soil is not actually discharged from the pipe jacking machine.

[0006] 3) When using only a single jack to push the pipe jacking machine body, there were problems during the test that the pipe jacking machine deviated from the axis and the machine body could not always remain vertical.

[0007] Currently, to meet the practical engineering needs of vertical pipe jacking construction, Chinese patent CN116104497A discloses a vertical jacking device and its usage method for shield tunnels. This device mainly consists of two parts: a pipe jacking head and a jacking mechanism. The jacking mechanism uses multiple jacks to provide excavation force, causing the pipe jacking head to jack into the soil. The cutterhead of the pipe jacking head then cuts the soil, and concrete is sprayed from the grouting pipe, completing the segment jacking step in vertical pipe jacking construction. The shortcomings of this solution are: 1) The jacking device uses multiple jacks to provide tunneling force, but these jacks operate independently, making it impossible to precisely control the jacking speed. If the jacks are not jacking in sync, the jacking machine head may still deviate from the axis.

[0008] 2) The device uses a micro motor to control the rotation of the cutterhead and a jack to control the lifting speed. It cannot change the cutterhead speed and lifting speed during construction, and cannot meet the need to change the cutterhead speed and lifting speed during the vertical pipe jacking model test. It also cannot study the influence of the synergistic effect of the cutterhead speed and lifting speed on the stress and deformation mechanism of the soil. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a vertical pipe jacking test system and method based on multi-parameter dynamic collaborative control.

[0010] In a first aspect, embodiments of the present invention provide a vertical pipe jacking test system based on multi-parameter dynamic collaborative control, the system comprising a vertical pipe jacking device and a model box, wherein: Vertical pipe jacking device, including: A base plate on which a first motor and a second motor are mounted; The output end of the first motor is connected to one end of the central rotating rod, and the other end of the central rotating rod is connected to the cutterhead; the first motor drives the central rotating rod to rotate the cutterhead, thereby simulating the process of the cutterhead cutting the soil in vertical pipe jacking construction; The central rotating rod is equipped with helical blades, and the end of the helical blades is provided with a soil outlet. The second motor drives the ball screw, which is connected to the lifting plate and the top plate respectively, thereby simulating the process of excavating soil in vertical pipe jacking construction; A model box is used to hold test soil. The bottom opening of the model box is opposite to and coaxially arranged with the cutterhead in the vertical pipe jacking device.

[0011] Secondly, embodiments of the present invention provide a vertical pipe jacking test method based on multi-parameter dynamic collaborative control, implemented based on the aforementioned vertical pipe jacking test system based on multi-parameter dynamic collaborative control. The method includes the following steps: Install the model box on the top plate of the vertical pipe jacking device, so that the bottom opening of the model box is opposite to and coaxially arranged with the cutter head of the vertical pipe jacking device; Dry sand was filled into the model box using the sand rain method. After the soil was covered, a thin cloth was laid on the ground and displacement sensors were installed. The first motor is started, which drives the central rotating rod to rotate the cutterhead, thereby simulating the process of the cutterhead cutting the soil in vertical pipe jacking construction; the cut soil is discharged from the outlet under the drive of the spiral blades. The second motor is started to drive the ball screw, which in turn drives the lifting plate to rise, thereby simulating the process of excavating soil in vertical pipe jacking construction. As the overburden depth decreases, the vertical earth pressure decreases. Based on the changes in earth pressure and the tunneling conditions, the speeds of the first motor and the second motor are adjusted to match the jacking force with the vertical earth pressure, thereby achieving multi-parameter dynamic coordinated control. When the cutterhead penetrates the soil layer, the first and second motors stop, and the displacement sensor is removed. The second motor is then started to rotate in the opposite direction, driving the ball screw to lower the lifting plate to the initial position, thus completing a set of vertical pipe jacking model tests.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The vertical pipe jacking device provided by the present invention is equipped with a spiral blade, and the end of the spiral blade is provided with a soil outlet, which can transport the cut soil downwards, so as to collect the cut soil from the soil outlet and directly measure the amount of soil discharged.

[0013] (2) This invention uses a second motor to drive a ball screw to raise the lifting plate, thereby simulating the process of excavating soil in vertical pipe jacking construction; wherein, the ball screw plays a guiding role. By rotating four ball screws to drive the lifting plate to rise and fall, the vertical pipe jacking machine body can be kept vertical at all times, solving the problem of the vertical pipe jacking machine body deviating from the axis. By controlling the vertical jacking with a single second motor, the jacking synchronization can be maintained, realizing the verticality of the vertical pipe axis during the tunneling process, avoiding the problem of the vertical pipe axis shifting due to the asynchronous jacking of multiple jacks.

[0014] (3) The cutterhead provided by the present invention is a replaceable structure. Considering the influence of the cutterhead opening ratio on the vertical pipe jacking construction process, in order to better adapt to the geological characteristics, the cutterhead includes at least three opening ratios of 36%, 54% and 68%, so as to more realistically simulate the process of the cutterhead cutting the soil.

[0015] (4) During the vertical pipe jacking construction process, the vertical earth pressure gradually decreases, so the required jacking force should also match the vertical earth pressure. This invention adjusts the cutter head speed and jacking speed by controlling the speed of the first motor and starting the second motor, thereby changing the magnitude of the jacking force to adapt to the changes in vertical earth pressure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A front sectional view of the vertical pipe jacking device provided in an embodiment of the invention; Figure 2 A side sectional view of a vertical pipe jacking device provided for an embodiment of the invention; Figure 3 A top sectional view (I-I) of the vertical pipe jacking device provided for an embodiment of the invention; Figure 4 A top sectional view (II-II) of the vertical pipe jacking device provided for an embodiment of the invention; Figure 5 A front view of the cutterhead structure in a vertical pipe jacking test system provided for an embodiment of the invention; Figure 6 A top view of the cutterhead structure in a vertical pipe jacking test system provided for an embodiment of the invention; Figure 7 A schematic diagram of the model box in the vertical pipe jacking test system provided for an embodiment of the invention; Figure 8 A flowchart of a vertical pipe jacking test method provided for embodiments of the invention; In the diagram, 1. First motor; 2. Second motor; 3. Reducer; 4. Coupling; 5. Connecting device; 6. Transmission device; 7. Housing; 8. Central rotating rod; 9. Helical blade; 10. Cutter head; 11. Cutter head fixing device; 12. Base plate; 13. Lifting plate; 14. Top plate; 15. Ball screw; 16. Top plate connecting device; 17. Lifting plate connecting device; 18. Excavation port; 19. Model box. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0019] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0020] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of this invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0021] The present invention will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0022] Vertical pipe jacking combines the advantages of both vertical jacking and upward tunneling shield tunneling methods for shaft construction. Compared to vertical jacking, vertical pipe jacking uses a cutterhead to cut the soil, reducing the need for jacking force. Compared to upward tunneling shield tunneling, vertical pipe jacking uses precast concrete pipe sections instead of segment assembly, improving the construction efficiency of the shaft.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment of the invention provides a vertical pipe jacking test system based on multi-parameter dynamic collaborative control. The system includes a vertical pipe jacking device and a model box 19, wherein: Vertical pipe jacking device, including: The base plate 12 is a rigid mounting base on which a first motor 1, a second motor 2, a reducer 3, a coupling 4, and a transmission device 6 are mounted. The output end of the first motor 1 is connected to one end of the central rotating rod 8 through the connecting device 5, and the other end of the central rotating rod 8 is connected to the cutter head 10 through the cutter head fixing device 11; the first motor 1 drives the central rotating rod 8 to rotate the cutter head 10, thereby simulating the process of the cutter head cutting the soil in vertical pipe jacking construction; A spiral blade 9 is installed on the central rotating rod 8, and a soil outlet 18 is provided at the end of the spiral blade 9. The second motor 2 drives the ball screw 15, which is connected to the lifting plate 13 and the top plate 14 respectively through the lifting plate connecting device 17 and the top plate connecting device 16, thereby simulating the process of excavating soil in vertical pipe jacking construction. Model box 19 is used to hold the test soil. The bottom opening of the model box 19 is opposite to and coaxially arranged with the cutter head 10 in the vertical pipe jacking device, so as to realize the vertical pipe jacking device to push in from bottom to top and cut the soil during the test.

[0024] Furthermore, such as Figure 5 and Figure 6 As shown, the cutter head 10 has a detachable structure, and the cutter head 10 includes at least three opening ratios of 36%, 54%, and 68%.

[0025] It should be noted that the cutterhead provided by the present invention is a replaceable structure. Considering the influence of the cutterhead opening ratio on the vertical pipe jacking construction process, in order to better adapt to the geological characteristics, the cutterhead includes at least three opening ratios of 36%, 54%, and 68%. During the test, cutterheads 10 with different opening ratios can be replaced according to the working conditions, and comparative tests can be carried out to more realistically simulate the process of the cutterhead cutting the soil.

[0026] Furthermore, a spiral blade 9 is installed on the central rotating rod 8, and a soil outlet 18 is provided at the end of the spiral blade 9. The spiral blade 9 is used to transport the soil cut by the cutter head 10 downward to the soil outlet 18. The soil outlet 18 is a sloping pipe structure with a slope, and its free end extends out of the vertical jacking device to discharge the cut soil so as to measure the amount of soil discharged during the test.

[0027] Furthermore, a housing 7 is installed on the lifting plate 13, forming a closed vertical jacking cavity between it and the cutter head 10. The housing 7 vertically covers the helical blades 9 and the central rotating rod 8 to limit the diffusion of the cut soil outside the housing 7. The housing 7 is preferably a cylindrical or polygonal cylindrical structure. Furthermore, such as Figure 4As shown, four transmission devices are symmetrically arranged at the four corners of the base plate 12. The second motor 2 is coupled to the transmission device via a reducer and a coupling. The transmission device is connected to the ball screw 15. The second motor 2 drives the transmission device to drive the ball screw 15 to rotate, thereby achieving synchronous lifting of the four ball screws 15.

[0028] Furthermore, such as Figure 7 As shown, the model box 19 is made of transparent acrylic, and a weatherstripping is provided at the bottom opening of the model box 19 to reduce sand leakage.

[0029] Furthermore, displacement sensors are arranged on the soil of the model box 19. The displacement sensors are arranged in a cross shape with a measuring point spacing of 150mm and a total of 9 measuring points.

[0030] Furthermore, the system also includes a controller for controlling the first motor 1 and the second motor 2. The controller adjusts the speed of the first motor 1 and the speed of the second motor 2 in real time according to the changes in the soil cover depth, jacking displacement or jacking force at different stages of vertical pipe jacking construction, so as to achieve multi-parameter dynamic coordinated control between the speed of the cutterhead 10 and the vertical jacking speed.

[0031] This study investigates the combined effects of three construction parameters—cutterhead opening ratio, cutterhead rotation speed, and jacking speed—on surface settlement. Dry sand was used in the experiment, and cutterheads with opening ratios of 36%, 54%, and 68% were selected. The initial cutterhead rotation speed was determined to be 2 rpm, and the initial jacking speed to be 2 cm / min. During vertical pipe jacking construction, the vertical earth pressure decreases with decreasing overburden depth. To adapt to this change, the jacking force should also decrease accordingly. Since the jacking force and cutterhead rotation speed / jacking speed of the vertical pipe jacking device are closely related, the jacking force can be indirectly adjusted by changing the cutterhead rotation speed and jacking speed to match the vertical earth pressure.

[0032] like Figure 8 As shown, this embodiment of the invention provides a vertical pipe jacking test method based on multi-parameter dynamic collaborative control, implemented based on the aforementioned vertical pipe jacking test system based on multi-parameter dynamic collaborative control. The method includes the following steps: Attach weatherstripping to the bottom opening of the model box 19 to reduce sand leakage; install the model box 19 on the top plate 14 of the vertical jacking device so that the bottom opening of the model box 19 is opposite to and coaxially arranged with the cutter head 10 of the vertical jacking device. Dry sand is filled into the model box 19 using the sand rain method. After the soil covering is completed, a thin cloth is laid on the ground surface, and displacement sensors are arranged. In this example, the displacement gauges are arranged in a cross shape with a measuring point spacing of 150mm and a total of 9 measuring points. The process of filling dry sand is as follows: the dry sand falls freely through the screen to simulate the deposition process of natural sandy soil. The first motor 1 is started, which drives the central rotating rod 8 to rotate the spiral blade 9 and the cutter head 10, thereby simulating the process of the cutter head cutting the soil in vertical pipe jacking construction; the cut soil is discharged from the outlet 18 under the drive of the spiral blade 9. The second motor 2 is started, and the ball screw 15 is driven through the reducer 3, coupling 4 and transmission device 6. The ball screw 15 converts the rotary motion into linear motion. The ball screw drives the lifting plate 13 to rise, so that the vertical pipe jacking device on the lifting plate 13 enters the test soil layer, thereby simulating the process of excavating soil in vertical pipe jacking construction. As the experiment progressed, the overburden depth decreased and the vertical earth pressure decreased. To adapt to this change, based on the earth pressure change and tunneling conditions, the speeds of the first motor 1 and the second motor 2 were adjusted to match the jacking force with the vertical earth pressure, thereby achieving multi-parameter dynamic coordinated control. When the cutterhead 10 penetrates the soil layer, the first motor 1 and the second motor 2 stop, the displacement sensor is removed, and the surface settlement data is collected and processed. The second motor 2 is then started to rotate in the opposite direction, driving the ball screw 15 to lower the lifting plate 13 to the initial position, completing one set of vertical pipe jacking model tests. The model box and vertical pipe jacking device are cleaned to prepare for the next set of tests.

[0033] Through the above structure and working process, the vertical pipe jacking test system of the present invention can simulate the actual vertical pipe jacking construction process under laboratory conditions, realize the controllable changes of multiple parameters such as cutterhead opening ratio, cutterhead rotation speed and jacking speed, study the stratum response law under the synergistic effect of different construction parameters, and provide a reference for the optimization of vertical pipe jacking construction parameters in actual engineering.

[0034] In summary, the vertical pipe jacking device provided by this invention is equipped with helical blades, the ends of which are provided with soil outlets. These outlets allow for downward transport of the cut soil, facilitating collection and direct measurement of the excavated soil. This invention uses a second motor to drive ball screws, which in turn raise the lifting plate, simulating the process of excavating soil during vertical pipe jacking construction. The ball screws act as guides. The rotation of four ball screws, driving the lifting plate's rise and fall, ensures the vertical pipe jacking machine remains vertical, solving the problem of the machine deviating from its axis. Controlling the vertical jacking with a single second motor maintains synchronous jacking, ensuring the verticality of the vertical pipe's axis during excavation and avoiding the problem of axis deviation caused by asynchronous jacking from multiple jacks. During vertical pipe jacking construction, the vertical earth pressure gradually decreases; therefore, the required jacking force should match the vertical earth pressure. This invention adjusts the cutterhead speed and jacking speed by controlling the speed of the first motor and starting the speed of the second motor, thereby changing the magnitude of the jacking force to adapt to changes in vertical earth pressure.

[0035] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only.

[0036] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A vertical pipe jacking test system based on multi-parameter dynamic collaborative control, characterized in that, The system includes a vertical pipe jacking device and a model box (19), wherein: Vertical pipe jacking device, including: A base plate (12) on which a first motor (1) and a second motor (2) are mounted; The output end of the first motor (1) is connected to one end of the central rotating rod (8), and the other end of the central rotating rod (8) is connected to the cutter head (10); the first motor (1) drives the central rotating rod (8) to rotate the cutter head (10), thereby simulating the process of the cutter head cutting the soil in vertical pipe jacking construction; A spiral blade (9) is installed on the central rotating rod (8), and a soil outlet (18) is provided at the end of the spiral blade (9). The second motor (2) drives the ball screw (15), which is connected to the lifting plate (13) and the top plate (14) respectively, thereby simulating the process of excavating soil in vertical pipe jacking construction; Model box (19), which is used to hold test soil, has a bottom opening opposite to and coaxially arranged with the cutterhead (10) in the vertical pipe jacking device.

2. The vertical pipe jacking test system based on multi-parameter dynamic collaborative control according to claim 1, characterized in that, The cutter head (10) is a detachable structure, and the cutter head (10) includes at least three opening ratios of 36%, 54% and 68%.

3. The vertical pipe jacking test system based on multi-parameter dynamic collaborative control according to claim 1, characterized in that, The central rotating rod (8) is equipped with a spiral blade (9), and the end of the spiral blade (9) is provided with a soil outlet (18). The spiral blade (9) is used to transport the soil cut by the cutter head (10) downward to the soil outlet (18). The soil outlet (18) is a sloping pipe used to discharge the cut soil.

4. The vertical pipe jacking test system based on multi-parameter dynamic collaborative control according to claim 1, characterized in that, The lifting plate (13) is equipped with a housing (7) and forms a closed vertical jacking cavity with the cutter head (10). The housing (7) covers the spiral blades (9) and the central rotating rod (8) in the vertical direction to limit the diffusion of the cutting soil outside the housing (7).

5. A vertical pipe jacking test system based on multi-parameter dynamic collaborative control according to claim 1, characterized in that, Four transmission devices are symmetrically arranged at the four corners of the base plate (12). The second motor (2) is coupled to the transmission device via a reducer and a coupling. The transmission device is connected to the ball screw (15). The second motor (2) drives the transmission device to drive the ball screw (15) to rotate, thereby achieving synchronous lifting of the four ball screws (15).

6. The vertical pipe jacking test system based on multi-parameter dynamic collaborative control according to claim 1, characterized in that, The bottom opening of the model box (19) is provided with a weatherstripping to reduce sand leakage from the model box (19).

7. A vertical pipe jacking test system based on multi-parameter dynamic collaborative control according to claim 1, characterized in that, Displacement sensors are arranged on the soil of the model box (19). The displacement sensors are arranged in a "+" shape with a measuring point spacing of 150mm and a total of 9 measuring points.

8. A vertical pipe jacking test system based on multi-parameter dynamic collaborative control according to claim 1, characterized in that, The system also includes a controller for controlling the first motor (1) and the second motor (2). The controller adjusts the speed of the first motor (1) and the speed of the second motor (2) in real time according to the changes in the soil cover depth, jacking displacement or jacking force at different stages of vertical pipe jacking construction, so that the speed of the cutterhead (10) and the vertical jacking speed can achieve multi-parameter dynamic coordinated control.

9. A vertical pipe jacking test method based on multi-parameter dynamic collaborative control, characterized in that, The method is based on the vertical pipe jacking test system based on multi-parameter dynamic collaborative control as described in any one of claims 1-8, and includes the following steps: Install the model box (19) on the top plate (14) of the vertical pipe jacking device, so that the bottom opening of the model box (19) is opposite to and coaxially arranged with the cutter head (10) of the vertical pipe jacking device; Dry sand was filled into the model box (19) by sand rain method. After the soil covering was completed, a thin cloth was laid on the ground and displacement sensors were arranged. Start the first motor (1) to drive the central rotating rod (8) to rotate the cutter head (10), thereby simulating the process of the cutter head cutting the soil in the vertical pipe jacking construction; the cut soil is discharged from the outlet (18) under the drive of the spiral blades (9); Start the second motor (2) to drive the ball screw (15), which in turn drives the lifting plate (13) to rise, thereby simulating the process of excavating soil in vertical pipe jacking construction; As the overburden depth decreases, the vertical earth pressure decreases. Based on the earth pressure change and tunneling conditions, the speed of the first motor (1) and the second motor (2) are adjusted to match the jacking force with the vertical earth pressure, thereby achieving multi-parameter dynamic coordinated control. When the cutterhead (10) penetrates the soil layer, the first motor (1) and the second motor (2) stop, and the displacement sensor is removed; the second motor (2) is started to rotate in the opposite direction, driving the ball screw (15) to drive the lifting plate (13) to descend to the initial position, thus completing a set of vertical pipe jacking model tests.

10. A vertical pipe jacking test method based on multi-parameter dynamic collaborative control according to claim 9, characterized in that, In the initial working conditions of the vertical pipe jacking model test, the cutterhead rotation speed was set to 2 rpm and the jacking speed was set to 2 cm / min.

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