阅读说明：本技术 一种埋地管道的模拟试验装置 (Simulation test device for buried pipeline ) 是由 倪芃芃 陈清树 刘建强 刘光荣 谢琪武 叶明鸽 于 2021-05-31 设计创作，主要内容包括：本发明提供了一种埋地管道的模拟试验装置,涉及管道测试领域。埋地管道的模拟试验装置包括基座、试验箱、竖向加载机构和边界加载机构,试验箱安装在基座上,竖向加载机构安装在试验箱的下部以模拟土体的局部沉陷；试验箱包括端板,端板上开设有活动孔,端板上滑动安装有对应活动孔的挡土板,挡土板中贯穿设有传力件,传力件的一端用于与试验管道连接；边界加载机构包括升降结构和拉伸驱动结构,升降结构固定在基座上,拉伸驱动结构安装在升降结构上,拉伸驱动结构与传力件的另一端传动连接。通过拉伸驱动结构对试验管道的端部产生轴向拉力作用,真实模拟出埋地管道的直线段对弯曲段的非线性约束作用,以及在不均匀沉陷区下管道的受力形态。(The invention provides a simulation test device for a buried pipeline, and relates to the field of pipeline testing. The simulation test device for the buried pipeline comprises a base, a test box, a vertical loading mechanism and a boundary loading mechanism, wherein the test box is installed on the base, and the vertical loading mechanism is installed at the lower part of the test box to simulate the local subsidence of a soil body; the test box comprises an end plate, wherein a movable hole is formed in the end plate, a retaining plate corresponding to the movable hole is slidably mounted on the end plate, a force transmission piece penetrates through the retaining plate, and one end of the force transmission piece is connected with a test pipeline; the boundary loading mechanism comprises a lifting structure and a stretching driving structure, the lifting structure is fixed on the base, the stretching driving structure is installed on the lifting structure, and the stretching driving structure is in transmission connection with the other end of the force transmission piece. The axial tension effect is generated on the end part of the test pipeline through the stretching driving structure, the nonlinear constraint effect of a straight line section of the buried pipeline on a bending section and the stress form of the pipeline in an uneven subsidence area are truly simulated.)

1. A simulation test device for a buried pipeline is characterized by comprising a base, a test box, a vertical loading mechanism and a boundary loading mechanism, wherein the test box is installed on the base, and the vertical loading mechanism is installed at the lower part of the test box to simulate local subsidence of a soil body;

the test box comprises an end plate, a movable hole is formed in the end plate, a retaining plate corresponding to the movable hole is slidably mounted on the end plate, a force transmission piece penetrates through the retaining plate, and one end of the force transmission piece is connected with a test pipeline in the test box;

the boundary loading mechanism comprises a lifting structure and a stretching driving structure, the lifting structure is fixed on the base, the stretching driving structure is installed on the lifting structure, and the stretching driving structure is in transmission connection with the other end of the force transmission piece.

2. The simulation test device of the buried pipeline according to claim 1, wherein the base comprises a bottom plate and an outer stand, the test box and the vertical loading mechanism are respectively installed on the bottom plate, the outer stand is fixedly arranged on the outer side of the boundary loading mechanism, and the end part, far away from the force transmission piece, of the tensile driving structure is assembled on the outer stand in a vertically sliding mode.

3. A simulation test device for a buried pipeline according to claim 2, wherein the tensile driving structure is an electro-hydraulic servo actuator, and a load sensor is connected between the electro-hydraulic servo actuator and the force transmission piece.

4. The simulation test device of the buried pipeline according to claim 3, wherein the electro-hydraulic servo actuator comprises an actuator body with a built-in displacement sensor, a servo valve, a first hinge and a second hinge, the servo valve is arranged on the actuator body with the built-in displacement sensor, the first hinge is connected between the actuator body with the built-in displacement sensor and the force transmission piece, and the second hinge is arranged at the end part, close to the outer vertical frame, of the actuator body with the built-in displacement sensor.

5. The simulation test device for the buried pipeline according to claim 3, wherein a vertical rail is arranged on the inner side of the outer vertical frame, the cross section of the vertical rail is T-shaped, a sliding block is assembled in the vertical rail in a sliding mode, the electro-hydraulic servo actuator is connected with the sliding block, and the sliding block is matched with the outer edge of the vertical rail in a blocking mode.

6. A simulation test device for a buried pipeline according to claim 2, wherein a fixing support is provided on the bottom plate, the test box is fixedly provided on the fixing support, and the test box has an opening portion overhanging to the outside of the fixing support;

the vertical loading mechanism is arranged on the lower side of the opening part and comprises a settling plate and a vertical loading piece, the settling plate is in concave-convex fit with the opening part, and the vertical loading piece is arranged on the bottom plate and is in transmission connection with the settling plate.

7. The simulation test device of the buried pipeline according to claim 1, wherein the force transmission piece is a force transmission rod, a vertical displacement sensor for detecting the displacement of the force transmission rod is further arranged on the outer side of the end plate, a through hole is formed in the soil retaining plate, and the force transmission rod penetrates through the through hole in a direction perpendicular to the plate surface of the soil retaining plate.

8. A simulation test device for a buried pipeline according to claim 7, wherein a flange bearing is arranged at the through hole of the soil blocking plate, and the dowel is inserted into an inner hole of the flange bearing.

9. The simulation test device for the buried pipeline according to claim 1, wherein the test box is in a rectangular parallelepiped shape, the test box comprises two side plates which are arranged in parallel with the test pipeline at intervals, a viewing window is arranged in the middle of the front side plate of the test box, and a foam layer is lined on the inner wall of the test box.

10. A simulation test device for a buried pipeline according to claim 1, wherein there are two boundary loading mechanisms, namely a first boundary loading mechanism and a second boundary loading mechanism, and the first boundary loading mechanism and the second boundary loading mechanism have the same structure;

the test box is in a cuboid shape and comprises two end plates which are oppositely arranged, the first boundary loading mechanism is arranged on the outer side of one end plate, and the second boundary loading mechanism is arranged on the outer side of the other end plate.

Technical Field

The invention relates to the technical field of pipeline testing, in particular to a simulation test device for a buried pipeline.

Background

Underground pipelines are called "urban lifelines" and have functions of water supply and drainage, gas transmission and heat supply, electric power communication, and the like. In a geological disaster prone area, the safety of the buried pipeline is affected by the uneven settlement of the ground, and the stress form of the buried pipeline needs to be tested and evaluated.

In practice, the linear distance for laying the buried pipeline is very long, under the action of uneven settlement of the stratum, the stress form of the buried pipeline is divided into an anchoring section (without stress) and a non-anchoring section (under stress) according to the position of an anchoring point, and the non-anchoring section can be divided into a straight section at a far stratum sudden change position and a bending section at a near stratum sudden change position.

At present, a common buried pipeline test is mainly completed by utilizing an indoor model box test, for example, the Chinese invention patent application with the application publication number of CN105203387A and the application publication number of 2015.12.30 discloses a pipe soil simulation test device under the influence of site settlement and faults, and particularly discloses that the test device comprises a fixed box body, a vertical moving box body and a horizontal moving box body which are sequentially arranged, soil bodies in the three box bodies are an organically combined whole, and a test pipeline penetrates through the three box bodies; the fixed box body is welded or anchored on the fixed table, the vertical movable box body is arranged on the temporary support rack and is removed before the test is started; the horizontal moving box body is arranged on the limiting track through a pulley assembly arranged at the bottom of the horizontal moving box body; the loading part comprises MTS power equipment, a vertical loading jack and a transverse loading jack. The settlement displacement of the movable box body is controlled through MTS power equipment, and the stress influence of different burial depths on the pipeline can be simulated by adjusting the pressure of the vertical loading jack.

However, the length of a test pipeline in the existing simulation test device is far smaller than the actual length of the pipeline, if the test pipeline is anchored in a fixed box body, the end part of the test pipeline forms a fixed boundary, the axial force of the pipeline is amplified in a stress test, the bending moment is weakened, and the constraint effect of a straight line section of the buried pipeline on a bending section cannot be truly simulated; if no constraint measure is taken at the two ends of the test pipeline, the end parts form free boundaries, so that the pipeline in the test is settled along with the settled soil body, the bending moment of the pipeline is amplified, and the axial force is weakened.

In summary, the conventional testing device cannot truly and equivalently measure the straight-line section of the stress form of the pipeline no matter the fixed boundary or the free boundary, and the stress form of the pipeline in the uneven subsidence area cannot be accurately tested due to the obvious difference between the stress form of the straight-line section and the end condition of the pipeline in the actual working condition.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a simulation test apparatus for a buried pipeline, so as to solve the problems that the constraint effect of a straight line segment of the buried pipeline on a bending section cannot be truly simulated, and the stress form of the pipeline in an uneven settlement area cannot be accurately tested.

The technical scheme of the simulation test device for the buried pipeline is as follows:

the simulation test device for the buried pipeline comprises a base, a test box, a vertical loading mechanism and a boundary loading mechanism, wherein the test box is installed on the base, and the vertical loading mechanism is installed at the lower part of the test box to simulate the local subsidence of a soil body;

the test box comprises an end plate, a movable hole is formed in the end plate, a retaining plate corresponding to the movable hole is slidably mounted on the end plate, a force transmission piece penetrates through the retaining plate, and one end of the force transmission piece is connected with a test pipeline in the test box;

the boundary loading mechanism comprises a lifting structure and a stretching driving structure, the lifting structure is fixed on the base, the stretching driving structure is installed on the lifting structure, and the stretching driving structure is in transmission connection with the other end of the force transmission piece.

Furthermore, the base comprises a bottom plate and an outer vertical frame, the test box and the vertical loading mechanism are respectively installed on the bottom plate, the outer vertical frame is fixedly arranged on the outer side of the boundary loading mechanism, and the end part, far away from the force transmission piece, of the tensile driving structure is assembled on the outer vertical frame in a vertically sliding mode.

Furthermore, the stretching driving structure is an electro-hydraulic servo actuator, and a load sensor is connected between the electro-hydraulic servo actuator and the force transmission piece.

Furthermore, the electro-hydraulic servo actuator comprises an actuator body with a built-in displacement sensor, a servo valve, a first hinge and a second hinge, wherein the servo valve is arranged on the actuator body with the built-in displacement sensor, the first hinge is connected between the actuator body with the built-in displacement sensor and the force transmission piece, and the second hinge is arranged at the end part, close to the outer vertical frame, of the actuator body with the built-in displacement sensor.

Furthermore, a vertical rail is arranged on the inner side of the outer vertical frame, the cross section of the vertical rail is in a T shape, a sliding block is assembled in the vertical rail in a sliding mode, the electro-hydraulic servo actuator is connected with the sliding block, and the sliding block is in blocking fit with the outer edge of the vertical rail.

Furthermore, a fixed support is arranged on the bottom plate, the test box is fixedly arranged on the fixed support, and the test box is provided with an opening part which is suspended to the outer side of the fixed support;

the vertical loading mechanism is arranged on the lower side of the opening part and comprises a settling plate and a vertical loading piece, the settling plate is in concave-convex fit with the opening part, and the vertical loading piece is arranged on the bottom plate and is in transmission connection with the settling plate.

Further, pass the power piece and be the dowel steel, the outside of end plate still is equipped with the vertical displacement sensor who is used for detecting the dowel steel displacement volume, the through-hole has been seted up on the fender apron, the dowel steel perpendicular to the face direction of fender apron is worn to establish in the through-hole.

Furthermore, a flange bearing is arranged at a through hole of the soil retaining plate, and the dowel bar is arranged in an inner hole of the flange bearing in a penetrating manner.

Furthermore, the test box is cuboid, the test box comprises two side plates which are parallel to the test pipeline and are arranged at intervals, an observation window is arranged in the middle of the front side plate of the test box, and a foam layer is lined on the inner wall of the test box.

Furthermore, two boundary loading mechanisms are arranged, namely a first boundary loading mechanism and a second boundary loading mechanism, and the first boundary loading mechanism and the second boundary loading mechanism have the same structure;

the test box is in a cuboid shape and comprises two end plates which are oppositely arranged, the first boundary loading mechanism is arranged on the outer side of one end plate, and the second boundary loading mechanism is arranged on the outer side of the other end plate.

Has the advantages that: the simulation test device for the buried pipeline adopts a base, a test box, a vertical loading mechanism and a boundary loading mechanism, wherein the vertical loading mechanism can simulate local subsidence of a soil body, the boundary loading mechanism comprises a lifting structure and a tensile driving structure, the tensile driving structure is connected with a test pipeline in the box through a force transmission piece, the constraint force on the end part of the test pipeline in the test process is always acted on the axis direction of the pipeline through the lifting structure, the axial tension effect is generated on the end part of the test pipeline through the tensile driving structure, the stressed deformation of the test pipeline in the test box is closer to the stressed deformation of the buried pipeline under the actual condition, the nonlinear constraint effect of a straight line segment of the buried pipeline on a bending segment can be truly simulated, and the stressed form of the pipeline in an uneven subsidence area is accurately tested.

And, the movable hole has been seted up on the end plate of proof box, and slidable mounting has the fender apron that corresponds the movable hole on the end plate, runs through in the fender apron to be equipped with and passes power piece, transmits the constraint effect of boundary loading mechanism to test pipeline through passing power piece, utilizes the fender apron to play the effect of sheltering from to the soil body of incasement, avoids the outside scattering of soil layer among the test procedure, and whole analogue test is truer and more accurate.

Finally, the up-and-down sliding design of the boundary loading mechanism and the arrangement of the cross-shaped hole positions of the dowel bars can meet the test requirements of different pipeline burial depths and different pipe diameters; the middle part of the front side plate of the test box is provided with an observation window, and the development track and the distribution range of the soil layer shear band can be determined by combining the particle imaging speed measurement technology.

Drawings

Fig. 1 is a schematic structural view of a simulation test apparatus for a buried pipeline in an embodiment of the simulation test apparatus for a buried pipeline according to the present invention;

FIG. 2 is an enlarged schematic view of the tension driving mechanism of FIG. 1;

fig. 3 is a schematic front view of a simulation test apparatus for a buried pipeline (omitting a lifting structure) in an embodiment of the simulation test apparatus for a buried pipeline of the present invention;

fig. 4 is a schematic top view of a buried pipeline simulation test apparatus in an embodiment of the buried pipeline simulation test apparatus of the present invention;

fig. 5 is a schematic right view of a simulation test apparatus for a buried pipeline in an embodiment of the simulation test apparatus for a buried pipeline of the present invention;

fig. 6 is a schematic view of boundary loading force-time in a specific embodiment of a simulation test apparatus of a buried pipeline of the present invention.

In the figure: 1-a base, 10-a bottom plate, 11-an outer vertical frame and 12-a fixed support;

2-test box, 21-end plate, 22-soil retaining plate, 23-side plate, 24-observation window, 25-foam layer, 26-flange bearing and 27-vertical displacement sensor;

the device comprises a vertical loading mechanism, a settlement plate 30, an electro-hydraulic servo actuator 4, an actuator body with a displacement sensor 40, a force transmission piece 41, a load sensor 42, a servo valve 43, a sliding block 44, a first hinge 45, a second hinge 46, a lifting structure 5 and a test pipeline 6.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In a specific embodiment 1 of the simulation test device for the buried pipeline of the present invention, as shown in fig. 1 to 6, the simulation test device for the buried pipeline includes a base 1, a test box 2, a vertical loading mechanism 3 and a boundary loading mechanism, the test box 2 is installed on the base 1, and the vertical loading mechanism 3 is installed at the lower part of the test box 2 to simulate local subsidence of a soil body; the test box 2 comprises an end plate 21, a movable hole is formed in the end plate 21, a retaining plate 22 corresponding to the movable hole is slidably mounted on the end plate 21, a force transmission piece 41 penetrates through the retaining plate 22, and one end of the force transmission piece 41 is used for being connected with a test pipeline 6 in the box; the boundary loading mechanism comprises a lifting structure 5 and a stretching driving structure, wherein the lifting structure 5 is fixed on the base 1, the stretching driving structure is installed on the lifting structure 5, and the stretching driving structure is in transmission connection with the other end of the force transmission piece 41.

The simulation test device of the buried pipeline adopts the structural design of a base 1, a test box 2, a vertical loading mechanism 3 and a boundary loading mechanism, wherein, the vertical loading mechanism 3 can simulate the local subsidence of the soil body, the boundary loading mechanism comprises a lifting structure 5 and a stretching driving structure, the stretching driving structure is connected with a test pipeline 6 in the box through a force transmission piece 41, the lifting structure 5 is used for realizing that the constraining force on the end part of the test pipeline 6 always acts on the axial direction of the pipeline in the test process, the tensile driving structure generates axial tension on the end part of the test pipeline 6, so that the stressed deformation of the test pipeline 6 in the test box 5 is closer to the stressed deformation of the buried pipeline under the actual condition, the nonlinear constraint effect of the straight line segment of the buried pipeline on the bending segment can be truly simulated, and the stress form of the pipeline in the uneven settlement area can be accurately tested. Moreover, the end plate 21 is provided with a movable hole, the end plate 21 is provided with a retaining plate 22 corresponding to the movable hole in a sliding manner, the retaining plate 22 is internally provided with a force transmission piece 41 in a penetrating manner, the constraint effect of the boundary loading mechanism is transmitted to the test pipeline 6 through the force transmission piece 41, the retaining plate 22 is utilized to shield the soil body in the box, the soil layer is prevented from scattering outwards in the test process, and the whole simulation test is more real and accurate.

In this embodiment, the base 1 includes a bottom plate 10 and an outer vertical frame 11, the test box 2 and the vertical loading mechanism 3 are respectively installed on the bottom plate 10, the outer vertical frame 11 is fixedly arranged outside the boundary loading mechanism, and the end of the tensile driving structure 4 far away from the force transmission member 41 is vertically slidably assembled on the outer vertical frame 11. With on test box 2 and the 3 mounting bottom plate 10 of vertical loading mechanism, guaranteed the stability of test box 2 when the test, adopt welded fastening between outer grudging post 11 and the bottom plate 10, the effect of sliding guide has been played about the tip that passes power piece 41 was kept away from to tensile drive structure 4 to outer grudging post 11 that is fixed in bottom plate 10, ensures the precision that tensile drive structure 4 reciprocated.

Wherein, the inside of outer grudging post 11 is provided with vertical track, and the vertical track's of outer grudging post 11 cross-sectional shape is the T font, and the slip 44 is equipped with in the vertical track to the slip, and electrohydraulic servo actuator 4 is connected with slip 44, and the slip 44 cooperates with the outer edge stop of the vertical track of outer grudging post 11. The cross section of the vertical rail of the outer vertical frame 11 is designed to be T-shaped, and the outer edge of the vertical rail is matched with the sliding block in a blocking mode, so that the accurate output of the boundary constraint force is guaranteed, and the lateral support performance of the stretching driving structure 4 is improved.

Specifically, the stretching driving structure is an electro-hydraulic servo actuator 4, and a load sensor 42 is connected between the electro-hydraulic servo actuator 4 and the force transmission piece 41. The electro-hydraulic servo actuator 4 comprises an actuator body 40 with a built-in displacement sensor, a servo valve 43, a first hinge 45 and a second hinge 46, wherein the servo valve 43 is arranged on the actuator body 40 with the built-in displacement sensor, the first hinge 45 is connected between the actuator body 40 with the built-in displacement sensor and a force transmission part 41, and the second hinge 46 is arranged at the end part, close to the outer vertical frame 11, of the actuator body 40 with the built-in displacement sensor. The actuator body 40 with the built-in displacement sensor converts hydraulic energy into mechanical energy, and the speed, direction and displacement of output load are more accurate.

The electro-hydraulic servo actuator 4 is externally connected with a control system, a boundary loading force-time relation program embedded in a computer sends out an instruction, as shown in fig. 6, the constraint force of the end part of a test pipeline 6 is accurately input, and the nonlinear constraint effect of a pipeline straight-line section at a far stratum sudden change position on a pipeline bending section in an actual working condition is effectively simulated.

A fixed support 12 is arranged on the bottom plate 10, the test box 2 is fixedly arranged on the fixed support 12, and the test box 2 is provided with an opening part which is suspended to the outer side of the fixed support 12; vertical loading mechanism 3 arranges the downside at the opening part of proof box 2, and vertical loading mechanism 3 includes subside board 30 and vertical loading piece, subsides board 30 and the unsmooth cooperation of opening part, and vertical loading piece sets up on bottom plate 10 and is connected with subside board 30 transmission.

Specifically, vertical loading pieces are provided with four, the four vertical loading pieces are fixed on the lower side of the settlement plate 30 through screws respectively, a displacement sensor and a load sensor are arranged in the vertical loading pieces, and a control system is externally connected to ensure that the four vertical loading pieces synchronously reduce the settlement plate 30 step by step, so that the purpose of simulating uneven settlement of a soil layer is realized.

The power transmission piece 41 is a dowel bar, the outer side of the end plate 22 is also provided with a vertical displacement sensor 27 for detecting the displacement of the dowel bar, the retaining plate 22 is provided with a through hole, and the dowel bar is perpendicular to the plate surface direction of the retaining plate 22 and penetrates through the through hole. The vertical displacement of the dowel bar and the end of the test pipeline 6 is detected by a vertical displacement sensor 27, a flange bearing 26 is arranged at the perforated part of the soil guard plate 22, and the dowel bar is arranged in an inner hole of the flange bearing 26 in a penetrating way. And, be provided with the rectangle cavity in end plate 22, the fender board 22 slidable mounting is in the rectangle cavity, has all scribbled lubricating oil in the vertical track of rectangle cavity and outer grudging post 11, has reduced the sliding friction power.

The test box 2 is cuboid, the test box 2 comprises two side plates 23 which are parallel to the test pipeline and are arranged at intervals, an observation window 24 is arranged in the middle of the front side plate of the test box 2, and a foam layer 25 is lined on the inner wall of the test box 2. The foam layer 25 can eliminate the friction force between the soil body and the inner wall of the box, and realize the simulation of the soil body at infinite distance; and, utilize the foam blanket 25 to guarantee that the settlement plate 30 can smooth descending motion, and prevent that soil body granule from outwards falling from the clearance between settlement plate 30 and the proof box 2 inner wall.

The two boundary loading mechanisms 4 are respectively a first boundary loading mechanism and a second boundary loading mechanism, and the first boundary loading mechanism and the second boundary loading mechanism have the same structure; the test chamber 2 is shaped as a rectangular parallelepiped, the test chamber 2 includes two end plates 21 arranged opposite to each other, the first boundary loading mechanism is arranged on the outer side of one end plate, and the second boundary loading mechanism is arranged on the outer side of the other end plate.

Before a test, filling soil into a test box 2 in layers and compacting, arranging a test pipeline 6 along the length direction of the test box 2, pre-attaching a strain gauge, a distributed optical fiber measuring element and the like on the pipeline according to the test purpose, connecting the end part of the test pipeline 6 with a cross hole of a dowel bar, realizing the connection and assembly of the test pipeline 6 and the dowel bar through bolts and screws, designing the vertical sliding of a boundary loading mechanism and arranging the cross hole of the dowel bar, and meeting the test requirements of different pipeline burial depths and different pipe diameters; and (3) installing a vertical displacement sensor 27 on the outer side of the end plate 21, utilizing the ejector pin to push against the dowel bar and setting a certain compression amount, and continuously filling and compacting in layers until the test requirements are met.

According to the test scheme, starting the test, sending an instruction by a computer embedded program, starting four vertical loading pieces of the vertical loading mechanism 3 to work through a control system, descending the settlement plates 30 step by step in a synchronous and coordinated manner, and simulating uneven settlement of the stratum in a real working condition; when the stratum sinks, a boundary loading force-time relation program embedded in a computer sends out an instruction, so that the test pipeline 6 generates an internal force response and a deformation result under the action of a constraint force at the end part of the test pipeline 6 in the test process, the nonlinear constraint action of the pipeline straight-line section at the far stratum mutation part on the pipeline bending section in the actual working condition is realized, the axial displacement of the end part of the test pipeline 6 can be monitored by a displacement sensor hole arranged in the electro-hydraulic servo actuator 4, and the tensile strength of the test pipeline 6 is further analyzed in combination with the applied constraint force; meanwhile, the vertical displacement of the end part of the test pipeline 6 is monitored according to the vertical displacement sensor 27, a computer embedded program sends out an instruction, the automatic lifting of the lifting structure 5 is controlled through a control system, the position of the electro-hydraulic servo actuator 4 and the end part of the test pipeline 6 are always on the same horizontal line in the test process, the constraint force on the end part of the test pipeline 6 is always acted on the axis direction of the pipeline, and the development track of the soil layer shear band is automatically and continuously captured and shot through the observation window 24 by adopting a camera.

After the test is finished, the stress and deformation of the test pipe 6 are analyzed according to the data acquired by the data acquisition equipment, the more accurate stress form of the test pipe 6 is obtained, the distribution range of the soil layer shear zone is determined by combining the particle imaging speed measurement technology, the failure mechanism of the buried pipeline is further disclosed, and the economic and reasonable design parameters of the buried pipeline in the uneven subsidence area on the ground are provided.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.