A test device and method for the settlement of pipeline network on roadbed slope.

Abstract

This invention provides a test device and method for the settlement of pipeline networks on roadbed slopes, including a support frame, an outlet pipe, an inlet pipe, a slope model, pipelines, a pressure plate, a hydraulic cylinder, a blower mechanism, and ropes. The slope model is located inside the support frame, and the pipelines are pre-embedded inside the slope model. A rope is attached to both ends of the pipelines, with the other end of the rope wound around the support frame. The pressure plate is located above the slope model. A hydraulic cylinder is hinged to the actuator of a linear drive mechanism, and the power output end of the hydraulic cylinder is hinged to the pressure plate. The blower mechanism is positioned circumferentially around the support frame. During pipeline settlement, the ropes are pulled downwards synchronously. The settlement amount of the pipeline can be determined by the amount of rope unwinding, thus simulating the settlement of the buried pipeline network within the roadbed slope under soil erosion conditions. This allows for adjustments to the slope's inclination and compaction based on the test data during actual slope construction, providing a theoretical basis for actual slope construction.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering, specifically to a test device and method for the settlement of roadbed slope pipelines. Background Technology

[0002] Slope stability refers to the degree of stability of the rock and soil of a slope under certain slope height and angle conditions. Artificial slopes may slip and fail under load, wind, earthquakes, rainfall, and other inducing factors. In urban highways, to meet water and power supply requirements, pipelines are sometimes laid through the interior of the roadbed slope. In windy and rainy conditions, the slope will experience soil erosion, necessitating the assessment of whether the pipelines are at risk of subsidence.

[0003] Publication number CN113533696A discloses a model test device for simulating the instability and failure of rock and soil slopes. This device investigates slope stability by constructing a slope model and then simulating a rainfall environment. Publication number CN109283317A discloses an indoor simulated rainfall environment test device and method for open-pit mine slope deformation. This prior art also investigates slope stability by constructing a slope model and then simulating a rainfall environment. Although both of these prior technologies investigate slope stability, some slopes may have buried pipes or pipe networks installed inside. Studying only the slope stability cannot investigate whether the internal pipe network has settled. Summary of the Invention

[0004] The purpose of this invention is to provide a test device and method for roadbed slope pipe network settlement, so as to solve the problems mentioned in the background art.

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

[0006] A roadbed slope pipe network settlement test device includes a support frame, an outlet pipe, an inlet pipe, a slope model, pipes, a pressure plate, a hydraulic cylinder, a blower mechanism, and ropes. The outlet pipe is arranged above the support frame, and a spray head is provided at the bottom of the outlet pipe. The outlet pipe is connected to the inlet pipe. The slope model is located inside the support frame.

[0007] The pipe is pre-embedded inside the slope model, and a rope is attached to both ends of the pipe. The other end of the rope is wound around the support frame. When the pipe sinks, it will pull the rope down synchronously. The sinking amount of the pipe can be obtained by the amount of rope unwinding. The pressure plate is located above the slope model. A linear drive mechanism is horizontally placed on both sides of the support frame. The actuator of the linear drive mechanism is hinged with a hydraulic cylinder, and the power output end of the hydraulic cylinder is hinged to the pressure plate. The blower is arranged around the circumference of the support frame.

[0008] Preferably, a winding wheel is rotatably mounted on the support frame, wherein one end of the rope is wound on the winding wheel and the other end is tied to the pipe, a pointer is provided on the side of the winding wheel, and a scale is also provided on the support frame, wherein the pointer is aligned with the scale.

[0009] Preferably, the blower mechanism includes an annular support, a sliding frame, and a blower. The annular support is located around the circumference of the support frame, the sliding frame is fitted onto the annular support and forms a sliding pair on the annular support, and the blower is located on the sliding frame and faces the slope model.

[0010] Preferably, the support frame is provided with a vertical pole, and the annular bracket cooperates with the vertical pole, thereby forming a sliding pair in the vertical direction.

[0011] Preferably, the linear drive mechanism consists of a linear guide rail and a linear motor. The linear guide rail is connected to the side of the support frame, and the linear motor is mounted on the linear guide rail. The base of the hydraulic cylinder is hinged to the linear motor.

[0012] Preferably, the pressure plate is provided with a contact plate on the side of the slope model, and a pressure sensor is provided between the contact plate and the pressure plate to detect the force exerted by the contact plate on the slope model.

[0013] A method for testing the settlement of pipeline networks on roadbed slopes includes the following steps:

[0014] S1. Insert the support frame into the soil, and then select the material to make the slope model according to the geological conditions of the site. Then construct the slope model. During the construction of the slope model, pre-embed pipes, and tie ropes to the ends of the pipes.

[0015] S2 connects to an external water source through the inlet pipe, and then the water is diverted to the sprinkler head through the outlet pipe, so that the sprinkler head simulates rainfall;

[0016] S3, the blower mechanism blows air during simulated rainfall to further simulate the real outdoor environment;

[0017] S4. Simulated rainfall will cause soil erosion in the slope model, which will lead to pipeline subsidence. At this time, the pipeline is pulled down by the rope under the action of gravity. The amount of downward movement of the rope is the amount of pipeline subsidence. This provides a theoretical basis for the pipeline subsidence caused by rainy weather. Furthermore, by changing the slope of the slope model and the compaction of the soil layer, the pipeline subsidence caused by soil erosion can be avoided.

[0018] Preferably, the specific method for constructing the slope model and pre-embedding the pipe in S1 is as follows: the required materials are stacked on the test platform, and the pipe is placed while the materials are stacked. At this time, the slope model does not have an actual slope. Then, the angle of the pressure plate is adjusted by using a hydraulic cylinder, and then the hydraulic cylinders at both ends of the pressure plate move synchronously, so that the inclined pressure plate compacts the slope model. Then, the compacted slope model shows the slope shape.

[0019] Preferably, the method for detecting the sinking amount of the pipeline in S4 is as follows: when the pipeline sinks, the rope is pulled down, and the rope is unwound from the winding wheel, which then rotates. The pointer on the side of the winding wheel swings accordingly, and the rotation angle of the winding wheel can be directly obtained from the dial. The amount of rope unwound is then calculated, and the amount of pipeline sinking is the amount of the pipeline sinking.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention pulls the rope down synchronously when the pipeline sinks. The amount of pipeline sinking can be obtained by the amount of rope unwinding. This simulates the sinking of the buried pipeline network inside the roadbed slope under water and soil flow conditions. In actual slope construction, the slope inclination and compaction can be changed according to the test data, providing a theoretical basis for actual slope construction. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a side view of the overall structure of the present invention;

[0024] Figure 3 This is a three-dimensional schematic diagram of the blower mechanism in this invention;

[0025] Figure 4 for Figure 1 Schematic diagram of section A in the middle;

[0026] Figure 5 for Figure 1 Schematic diagram of section B in the middle.

[0027] In the diagram: 1. Support frame, 2. Outlet pipe, 3. Inlet pipe, 4. Slope model, 5. Pipe, 6. Pressure plate, 7. Hydraulic cylinder, 8. Blower mechanism, 9. Rope, 21. Spray head, 71. Linear guide rail, 72. Linear motor, 81. Ring bracket, 82. Sliding frame, 83. Fan, 84. Upright pole, 91. Winding wheel, 92. Pointer, 93. Dial. Detailed Implementation

[0028] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example:

[0030] Please see Figures 1 to 5 The present invention provides a technical solution:

[0031] A roadbed slope pipe network settlement test device includes a support frame 1, an outlet pipe 2, an inlet pipe 3, a slope model 4, pipes 5, a pressure plate 6, a hydraulic cylinder 7, a blower mechanism 8, and ropes 9, wherein:

[0032] The water outlet pipe 2 is arranged above the support frame 1. The number of water outlet pipes 2 is reasonably selected according to the range of the simulated area and evenly distributed. The bottom of the water outlet pipe 2 is equipped with a spray head 21, which can spray raindrop-shaped water. The water outlet pipe 2 is connected to the water inlet pipe 3. The water inlet pipe 3 is equipped with an inlet for connecting to an external water source. The slope model 4 is located inside the support frame 1.

[0033] Slope Model 4 is a test model constructed using on-site soil layers, while... Figure 1 and 2 The slope model 4 shown is for illustrative purposes only. In actual experiments, it can be a stepped, multi-tiered slope. Furthermore, the circumferential end face of slope model 4 is not vertical; circumferential slope protection is required to prevent collapse during compaction of the slope surface. Pipes 5 are pre-embedded inside slope model 4, forming a network of multiple pipes 5. Each pipe 5 has a rope 9 attached to both ends, with the other end of the rope 9 wound around the support frame 1. As the pipe 5 sinks, it pulls the rope downwards synchronously. The amount of sinking of the pipe 5 can be determined by the amount of rope 9 unwound. Since both ends of the pipe 5 are secured with ropes 9, even if only one end of the pipe 5 sinks, the amount of sinking of the pipe 5 can be determined by the amount of unwinding of the corresponding end rope 9. The pressure plate 6 is located above the slope model 4. A linear drive mechanism is horizontally placed on both sides of the support frame 1. The actuator of the linear drive mechanism is hinged with a hydraulic cylinder 7, and the power output end of the hydraulic cylinder 7 is hinged to the pressure plate 6. Therefore, the angle of the pressure plate 6 can be changed by the hydraulic cylinder 7, and the slope can be compacted when the two hydraulic cylinders 7 push the pressure plate 6 down synchronously. The blower mechanism 8 is set in the circumference of the support frame 1.

[0034] In a preferred embodiment, a winding wheel 91 is rotatably mounted on the support frame 1. One end of the rope 9 is wound around the winding wheel 91, and the other end is attached to the pipe 5. A pointer 92 is provided on the side of the winding wheel 91, and a scale 93 is also provided on the support frame 1, with the pointer 92 facing the scale 93. In this embodiment, the rope 9 pulls the winding wheel 91 to unwind, thereby driving the pointer 92 to swing on the scale 93, thus determining the amount of rope 9 unwound.

[0035] As a preferred embodiment, the unwinding amount detection of rope 9 is not limited to pointer 92 and dial 93. Marking lines can also be drawn on rope 9, and the initial height of the marking lines can be used as a reference. The amount of downward movement of the marking lines relative to the support frame 1 is the amount of downward movement of rope 9. The amount of downward movement of rope 9 can then be measured with a ruler.

[0036] In a preferred embodiment, the blower mechanism 8 includes an annular support 81, a sliding frame 82, and a blower 83. The annular support 81 is located circumferentially on the support frame 1. The sliding frame 82 is fitted onto the annular support 81 and forms a sliding pair on the annular support 81. The blower 83 is mounted on the sliding frame 82 and faces the slope model 4. By moving the sliding frame 82, the position of the blower 83 can be changed to simulate different wind directions. The blower mechanism 8 disclosed in this embodiment can change the position of the blower 83 manually. Of course, it is not limited to manual adjustment. It can also be used with an annular belt drive assembly or a chain drive assembly. The sliding frame 82 is connected to the belt or chain, so that the position of the sliding frame 82 can be automatically adjusted to change the wind direction.

[0037] In a preferred embodiment, the support frame 1 is provided with a vertical rod 84, and the annular bracket 81 cooperates with the vertical rod 84, thereby forming a sliding pair in the vertical direction. As a result, the height of the annular bracket 81, which is the support component of the blower mechanism 8 as a whole, is adjustable, thereby adapting to slopes of different heights.

[0038] In a preferred embodiment, the annular bracket 81 and the upright 84 can also have a large frictional force, so that the annular bracket 81 cannot move up or down along the upright 84 without the action of external force, thus avoiding the intervention of other limiting components. Of course, limiting components can also be intervened. Preferably, a limiting bolt is provided in the threaded hole on the annular bracket 81, and the end of the limiting bolt contacts the upright 84 to achieve the effect of fixing the annular bracket 81.

[0039] Of course, in a preferred embodiment, the linear drive mechanism consists of a linear guide rail 71 and a linear motor 72. The linear guide rail 71 is connected to the side of the support frame 1, and the linear motor 72 is mounted on the linear guide rail 71. The base of the hydraulic cylinder 7 is hinged to the linear motor 72. The linear drive mechanism used in this invention is not limited to this; it can also be a linear drive component consisting of a lead screw drive pair or a long-distance linear cylinder.

[0040] In a preferred embodiment, a contact plate is provided on the side of the pressure plate 6 near the slope model 4, and a pressure sensor is provided between the contact plate and the pressure plate 6 to detect the force exerted by the contact plate on the slope model 4. The reaction force generated when the contact plate contacts the slope model 4 is applied to the pressure sensor, thereby determining the magnitude of the compaction force on the slope model 4. The pressure sensor disclosed in this embodiment is preferably a sensor assembly with a numerical display, which can directly determine the magnitude of the force detected by the sensor without needing to feed back the detected value. Pressure sensors with numerical displays are a commonly used technique, and their specific models and operating principles will not be described here.

[0041] A method for testing the settlement of pipeline networks on roadbed slopes includes the following steps:

[0042] S1. Insert the support frame 1 into the soil, and then select the material to manufacture the slope model 4 according to the geological conditions of the site. The material is the soil on site. Then, construct the slope model 4. During the construction of the slope model 4, pre-embed pipes 5, with ropes 9 attached to the ends of the pipes 5. The specific method of constructing the slope model 4 and pre-embedding the pipes 5 is as follows: stack the required materials on the test platform and place the pipes 5 while stacking the materials. At this time, the slope model 4 does not have an actual slope. Then, use hydraulic cylinders 7 to adjust the angle of the pressure plate 6. Then, the hydraulic cylinders 7 at both ends of the pressure plate 6 act synchronously, so that the inclined pressure plate 6 compacts the slope model 4. After compaction, the slope model 4 shows the slope shape. Before compaction, arrange the slope protection around the slope model 4 to prevent the slope model 4 from collapsing under the action of external forces. The slope protection is made of the same material as the slope model 4.

[0043] S2, the water source is connected to the inlet pipe 3, and then the water is diverted to the sprinkler head 21 through the outlet pipe 2, so the sprinkler head 21 simulates rainfall;

[0044] S3, during simulated rainfall, blower mechanism 8 blows air to further simulate the real outdoor environment;

[0045] S4. Simulated rainfall will cause soil erosion in slope model 4, leading to the sinking of pipe 5. At this time, pipe 5 pulls down rope 9 under the action of gravity. The amount of downward movement of rope 9 is the amount of sinking of pipe 5. This provides a theoretical basis for the sinking of pipe 5 caused by rainy weather. Furthermore, by changing the slope of slope model 4 and the compaction of the soil layer, the sinking of pipe 5 caused by soil erosion can be avoided. The sinking of pipe 5 is detected as follows: when pipe 5 sinks, it pulls down rope 9. Rope 9 is unwound from winding wheel 91, causing winding wheel 91 to rotate. The pointer 92 on the side of winding wheel 91 swings accordingly. The rotation angle of winding wheel 91 can be directly obtained from the scale 93, and the unwound amount of rope 9 can be calculated. The unwound amount of rope 9 is the sinking amount of pipe 5.

[0046] The specific process of compacting the slope model 4 using the pressure plate 6 in the above experimental method is as follows: with the attached... Figure 2 As a reference for the left and right directions, the hydraulic cylinder 7 on the left first pushes the pressure plate 6 to tilt. Then, the hydraulic cylinders 7 on both sides simultaneously push the pressure plate 6 to descend. The tilted pressure plate 6 will then compact the unformed slope model 4. After the current area is compacted, the hydraulic cylinders 7 on both sides simultaneously pull back the pressure plate 6 to rise. Then, the linear drive mechanism drives the pressure plate 6 to move to the position of the slope model 4 to be compacted. Then, the above compaction steps are repeated to construct a slope model 4 with a fixed slope and compaction degree.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A roadbed slope pipe network settlement test device, comprising a support frame (1), an outlet pipe (2), an inlet pipe (3), a slope model (4), a pipe (5), a pressure plate (6), a hydraulic cylinder (7), a blower mechanism (8), and a rope (9), wherein the outlet pipe (2) is arranged above the support frame (1), and a spray head (21) is provided at the bottom of the outlet pipe (2), the outlet pipe (2) is connected to the inlet pipe (3), and the slope model (4) is located inside the support frame (1), characterized in that: The pipe (5) is embedded inside the slope model (4), and a rope (9) is attached to both ends of the pipe (5). The other end of the rope (9) is wound around the support frame (1). When the pipe (5) sinks, it will pull the rope to move down synchronously. The sinking amount of the pipe (5) can be obtained by the amount of unwinding of the rope (9). The pressure plate (6) is located above the slope model (4). A straight-line drive mechanism is horizontally placed on both sides of the support frame (1). A hydraulic cylinder (7) is hinged on the execution part of the straight-line drive mechanism. The power output end of the hydraulic cylinder (7) is hinged to the pressure plate (6). The blower mechanism (8) is set in the circumference of the support frame (1).

2. The roadbed slope pipeline settlement test device according to claim 1, characterized in that: A winding wheel (91) is rotatably mounted on the support frame (1), wherein one end of the rope (9) is wound on the winding wheel (91) and the other end is tied to the pipe (5). A pointer (92) is provided on the side of the winding wheel (91), and a scale (93) is also provided on the support frame (1), wherein the pointer (92) is facing the scale (93).

3. The roadbed slope pipeline settlement test device according to claim 1, characterized in that: The blower mechanism (8) includes an annular support (81), a sliding frame (82) and a blower (83). The annular support (81) is located around the support frame (1). The sliding frame (82) is fitted on the annular support (81) and forms a sliding pair on the annular support (81). The blower (83) is located on the sliding frame (82) and faces the slope model (4).

4. The roadbed slope pipeline settlement test device according to claim 3, characterized in that: The support frame (1) is provided with a vertical rod (84), and the ring bracket (81) cooperates with the vertical rod (84), thereby forming a sliding pair in the vertical direction.

5. The roadbed slope pipeline settlement test device according to claim 1, characterized in that: The linear drive mechanism consists of a linear guide rail (71) and a linear motor (72). The linear guide rail (71) is connected to the side of the support frame (1), and the linear motor (72) is mounted on the linear guide rail (71). The base of the hydraulic cylinder (7) is hinged to the linear motor (72).

6. The roadbed slope pipeline settlement test device according to claim 1, characterized in that: The pressure plate (6) has a contact plate on the side close to the slope model (4), and a pressure sensor is provided between the contact plate and the pressure plate (6) to detect the force exerted by the contact plate on the slope model (4).

7. A method for testing the settlement of a roadbed slope pipeline network, based on the roadbed slope pipeline network settlement test apparatus described in any one of claims 1-6, characterized in that, Includes the following steps: S1, insert the support frame (1) into the soil, and then select the material to make the slope model (4) according to the geological conditions of the site, and then construct the slope model (4). During the construction of the slope model (4), pre-embed the pipe (5), and tie the end of the pipe (5) with a rope (9). S2, through the inlet pipe (3) connected to an external water source, and then through the outlet pipe (2) diverted to the sprinkler head (21), where the sprinkler head (21) simulates rainfall; S3, the blower mechanism (8) blows air during simulated rainfall to further simulate the real outdoor environment; S4, simulated precipitation will cause soil erosion in the slope model (4), and the pipeline (5) will sink. At this time, the pipeline (5) will pull down the rope (9) under the action of gravity. The amount of downward movement of the rope (9) is the amount of sinking of the pipeline (5). This provides a theoretical basis for the sinking of the pipeline (5) caused by rainy weather. Then, by changing the slope of the slope model (4) and the compaction of the soil layer, the sinking of the pipeline (5) caused by soil erosion can be avoided.

8. The method for testing the settlement of pipeline network on a roadbed slope according to claim 7, characterized in that: The specific method for constructing the slope model (4) and pre-embedding the pipe (5) in S1 is as follows: the required materials are stacked on the test bench, and the pipe (5) is placed while the materials are stacked. At this time, the slope model (4) does not have an actual slope. Then, the angle of the pressure plate (6) is adjusted by the hydraulic cylinder (7), and then the hydraulic cylinders (7) at both ends of the pressure plate (6) move synchronously, so that the inclined pressure plate (6) compacts the slope model (4). The compacted slope model (4) shows the slope shape.

9. A test method for roadbed slope pipe network settlement according to claim 7, characterized in that: The method for detecting the sinking amount of the pipe (5) in S4 is as follows: when the pipe (5) sinks, the rope (9) will be pulled down, the rope (9) will be unwound from the winding wheel (91), and the winding wheel (91) will rotate. The pointer (92) on the side of the winding wheel (91) will swing accordingly. The rotation angle of the winding wheel (91) can be directly obtained from the scale (93), and the unwinding amount of the rope (9) can be calculated. The unwinding amount of the rope (9) is the sinking amount of the pipe (5).

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