Test device for optimizing construction parameters of underground pipeline

Abstract

The utility model provides a test device for optimizing construction parameters of an underground pipeline, and relates to the technical field of test devices. In the process that the pipeline synchronously moves downwards in stratum compression deformation, the sliding plate can move downwards along with the pipeline, support of the test box assembly on the pipeline is weakened, the real stress condition of the underground pipeline is restored, and powerful guarantee can be provided for design of various parameters in underground pipeline construction; comprising the steps that under the conditions of different stratum characteristics and different load loading, the design of a cushion layer for optimizing pipe laying method construction is researched, or the slurry proportion and grouting hole layout for optimizing pipe jacking method construction are researched, and the grouting resistance reduction mechanism can be researched through the test phenomenon and result.

Description

Technical Field

[0001] This utility model relates to the field of experimental device technology, specifically to an experimental device for optimizing underground pipeline construction parameters. Background Technology

[0002] With the vigorous advancement of urbanization, municipal engineering construction has become increasingly important in socio-economic development, and the number of underground pipelines is increasing year by year. Pipe laying and pipe jacking are commonly used underground pipeline construction methods. Pipe laying, as a traditional open-cut construction technique, is relatively easy to implement. However, after operation, the pipeline is susceptible to deformation due to overhead loads, which can jeopardize its operation. Pipe jacking is a trenchless construction technique with the advantage of minimal environmental impact, but the construction difficulty gradually increases during long-distance jacking. Geotechnical engineering problems are complex and varied; under different soil conditions and complex environments, there are still issues with the unreasonable design of construction parameters for pipe laying and pipe jacking.

[0003] Therefore, there is a need to explore a multifunctional experimental device for optimizing underground pipeline construction parameters. This device would investigate the effects of different bedding materials on optimizing the stress on buried pipes, and the effects of different grouting parameters on reducing friction during pipe jacking. This would provide a reference for future underground pipeline construction parameter design and ensure the safety and reliability of its practical application. Currently, some scholars have already explored the optimization of underground pipeline construction parameters. For example, Li Tongda et al. conducted large-scale indoor cyclic shear tests to study the deformation characteristics of pebble-crushed stone bedding layers. Yang Hongjun et al., based on the Zhengzhou rectangular pipe jacking tunnel project, studied the effects of pipe jacking drag reduction technologies such as grouting hole layout, thixotropic mud preparation, optimized grouting pipeline design, and pipe section surface waxing. While these technologies have been successfully implemented in the field, the design schemes for construction parameters are not universally applicable due to varying geological environments in different regions. Therefore, there is an urgent need for a multifunctional experimental device for optimizing underground pipeline construction parameters. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a test device for optimizing underground pipeline construction parameters, which solves the problem that tests for optimizing underground pipeline construction parameters cannot simulate the stress optimization effect of different subbase materials under different load conditions.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A test apparatus for optimizing underground pipeline construction parameters, the test apparatus comprising: a test chamber assembly;

[0007] The test chamber assembly includes: a frame, tempered glass, double-layer steel plates, a sliding plate, a gantry beam, and a load transfer frame;

[0008] The front and back of the frame are encapsulated with tempered glass.

[0009] The left and right sides of the frame are enclosed by double-layer steel plates and sliding plates. The top beam and bottom beam of the frame are provided with strip holes for the sliding plates to slide vertically. The left and right sides of the frame are enclosed by double-layer steel plates on both sides of the sliding plates, and the two sides of the sliding plates are inserted into the gaps of the double-layer steel plates.

[0010] The gantry beam is installed on the top beam by a bracket, and the load transfer frame is installed at the bottom of the gantry beam by a jack.

[0011] The support frame is equipped with a support beam, which is connected to a hook via a rope. The hook suspends the upward-moving sliding plate. The bottom of the suspended sliding plate is still accommodated in the slot of the bottom beam.

[0012] The sliding plate has a circular hole in the middle that matches the pipe.

[0013] Preferably, the top of the bracket is provided with several supports, and the two ends of the support beam are installed in the supports.

[0014] Preferably, the test chamber assembly contains soil and rock material, the pipe is buried in the soil and rock material, both ends of the pipe are aligned with the circular hole, and a soil pressure cell sensor is buried above the pipe.

[0015] Preferably, the testing apparatus further includes: a deformation measurement component;

[0016] The deformation measurement assembly includes: a support rod, a measuring beam, and a displacement sensor;

[0017] The outer wall of the frame is provided with several hooks, and the two ends of the support rod are installed in the hooks. A measuring beam is erected between the two support rods on the left and right sides of the frame. The measuring beam passes through the round hole and the pipe. A displacement sensor is fixed on the measuring beam to monitor the deformation of the pipe under the load applied by the load transfer frame.

[0018] Preferably, the test apparatus further includes: a jacking assembly;

[0019] The jacking assembly includes: a reaction wall, an actuator, and a PC;

[0020] A first flange is provided at the end of the pipe;

[0021] The reaction wall has multiple sets of screw holes;

[0022] The actuator is provided with a second flange and a third flange at both ends;

[0023] The first flange is connected to the second flange, and the third flange is connected to the bolts and screw holes.

[0024] The PC is connected to the actuator and is used to control the extension and retraction of the actuator, and to record the jacking thrust of the actuator throughout the process.

[0025] Preferably, the test apparatus further includes: a slurry delivery assembly;

[0026] The grouting assembly includes: a grouting pump and a grouting pipe;

[0027] The pipe wall is provided with grouting holes;

[0028] The grout pump is connected to the grouting hole via a grouting pipe and is used to transport slurry to the outside of the pipeline.

[0029] Preferably, a force transmission frame is provided below the load transfer frame, and the force transmission frame includes: a plurality of I-beams;

[0030] The I-beams are perpendicular to the extension direction of the load transfer frame, and the I-beams are placed on top of the soil and rock material.

[0031] Preferably, as shown in the figure, a force transmission frame is provided below the load transfer frame, and the force transmission frame includes: a load plate and several I-beams;

[0032] The extension direction of the I-beam is perpendicular to that of the load transfer frame. The load plate is placed on top of the soil and rock material, and the I-beam is installed on top of the load plate.

[0033] This invention provides a test device for optimizing underground pipeline construction parameters. Compared with the prior art, it has the following advantages:

[0034] In this invention, during the synchronous downward movement of the pipeline under compression deformation in the stratum, the sliding plate can move downward with the pipeline, reducing the support of the test chamber components on the pipeline, restoring the true stress condition of the underground pipeline, and providing strong support for the design of various parameters in the construction of underground pipelines; including: being able to study and optimize the design of the subbase for buried pipe construction under different stratum characteristics and different load conditions, or to study and optimize the mud ratio and grouting hole layout for pipe jacking construction, and being able to study the grouting drag reduction mechanism through experimental phenomena and results. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is an isometric drawing of the test chamber assembly and deformation measurement assembly in this utility model;

[0037] Figure 2 This is the assembly front view of the test chamber component and the deformation measurement component in this utility model;

[0038] Figure 3 This is an assembly side view of the test chamber assembly and deformation measurement assembly in this utility model;

[0039] Figure 4 This is a top view of the assembly of the test chamber component and the deformation measurement component in this utility model;

[0040] Figure 5 This is an isometric view of the assembly of the test chamber assembly, the jacking assembly, and the slurry conveying assembly in this utility model;

[0041] Figure 6 This is a front view of the assembly of the test chamber assembly, the jacking assembly, and the slurry conveying assembly in this utility model;

[0042] Figure 7 This is an assembly side view of the test chamber assembly, jacking assembly, and slurry delivery assembly in this utility model;

[0043] Figure 8 This is a top view of the assembly of the test chamber assembly, the jacking assembly, and the slurry conveying assembly in this utility model;

[0044] The reference numerals in the figure are as follows: 1. Support; 2. Earth pressure cell sensor; 3. Frame; 4. Pipe; 5. Tempered glass; 6. Support beam; 7. Rope; 8. Hook; 9. Gantry beam; 10. Jack; 11. Load transfer frame; 12. Strip hole; 13. Support; 14. Load plate; 15. Top beam; 16. Sliding plate; 17. Measuring beam; 18. Support rod; 19. Hook; 20. Double-layer steel plate; 21. Displacement sensor; 22. Grouting pump; 23. Grouting pipe; 24. First flange; 25. Second flange; 26. Reaction wall; 27. Actuator; 28. Third flange; 29. ​​PC; 30. Test chamber assembly. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0046] This application provides a test device for optimizing underground pipeline construction parameters, addressing the problem that tests for optimizing underground pipeline construction parameters cannot simulate the stress optimization effect of different subbase materials under different load conditions.

[0047] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0048] Example 1:

[0049] like Figures 1 to 8 As shown, this utility model provides a test device for optimizing underground pipeline construction parameters, the test device including: test chamber assembly 30;

[0050] The test chamber assembly 30 includes: a frame 3, tempered glass 5, double-layer steel plate 20, sliding plate 16, gantry beam 9, and load transfer frame 11;

[0051] The front and rear of the frame 3 are encapsulated with tempered glass 5;

[0052] The left and right sides of the frame 3 are enclosed by double-layer steel plates 20 and sliding plates 16. The top beam 15 and bottom beam of the frame 3 are provided with strip holes 12 for the sliding plates 16 to slide vertically. The left and right sides of the frame 3 are enclosed by double-layer steel plates 20 on both sides of the sliding plates 16, and the two sides of the sliding plates 16 are inserted into the gaps of the double-layer steel plates 20.

[0053] The gantry beam 9 is mounted on the top beam 15 via the bracket 13, and the load transfer frame 11 is mounted on the bottom of the gantry beam 9 via the jack 10.

[0054] The support beam 6 is provided on the bracket 13. The support beam 6 is connected to the hook 8 by the rope 7. The hook 8 suspends the upward sliding plate 16. The bottom of the sliding plate 16 in the suspended state is still accommodated in the strip hole 12 of the bottom beam to prevent the soil and rock material in the test chamber assembly 30 from leaking out from the bottom of the sliding plate 16.

[0055] The sliding plate 16 has a circular hole in the middle for matching the pipe 4.

[0056] like Figures 1 to 8 As shown, the top of the bracket 13 is provided with several supports 1, and the two ends of the support beam 6 are installed in the supports 1.

[0057] like Figures 1-4 As shown, the test chamber assembly 30 contains soil and rock material, the pipe 4 is buried in the soil and rock material, the two ends of the pipe 4 are aligned with the round hole, and the soil pressure box sensor 2 is buried above the pipe 4.

[0058] like Figures 1-4 As shown, the test apparatus further includes: a deformation measurement component;

[0059] The deformation measurement assembly includes: a support rod 18, a measuring beam 17, and a displacement sensor 21;

[0060] The outer wall of the frame 3 is provided with several hooks 19. The two ends of the support rod 18 are installed in the hooks 19. A measuring beam 17 is erected between the two support rods 18 on the left and right sides of the frame 3. The measuring beam 17 passes through the round hole and the pipe 4. A displacement sensor 21 is fixed on the measuring beam 17 to monitor the deformation of the pipe 4 under the load applied by the load transfer frame 11.

[0061] like Figures 5-8 As shown, the test apparatus further includes: a jacking assembly;

[0062] The jacking assembly includes: a reaction wall 26, an actuator 27, and a PC 29;

[0063] The end of the pipe 4 is provided with a first flange 24;

[0064] The reaction wall 26 has multiple sets of screw holes;

[0065] The actuator 27 is provided with a second flange 25 and a third flange 28 at its two ends respectively;

[0066] The first flange 24 is connected to the second flange 25, and the third flange 28 is connected to the third flange by bolts and screw holes;

[0067] The PC29 is connected to the actuator 27 and is used to control the extension and retraction of the actuator 27, and to record the jacking thrust of the actuator 27 throughout the process.

[0068] like Figures 5-8 As shown, the test apparatus also includes: a slurry delivery assembly;

[0069] The grouting assembly includes: a grouting pump 22 and a grouting pipe 23;

[0070] The pipe wall of the pipe 4 is provided with grouting holes;

[0071] The grout pump 22 is connected to the grouting hole through the grouting pipe 23 and is used to transport the slurry to the outside of the pipeline 4.

[0072] Example 2:

[0073] like Figure 1 As shown, a force transmission frame is provided below the load transfer frame 11, and the force transmission frame includes: several I-beams;

[0074] The I-beam is perpendicular to the extension direction of the load transfer frame 11, and the I-beam is placed on top of the soil and rock material.

[0075] Example 3:

[0076] like Figure 1 As shown, a force transmission frame is provided below the load transfer frame 11. The force transmission frame includes a load plate 14 and several I-beams.

[0077] The extension direction of the I-beam is perpendicular to that of the load transfer frame 11. The load plate 14 is placed on top of the soil and rock material, and the I-beam is installed on top of the load plate 14.

[0078] Example 4:

[0079] The test methods of the test device include: buried pipe test method;

[0080] The buried pipe testing method includes the following steps:

[0081] S1. The upward sliding plate 16 is suspended at a certain height by the hook 8;

[0082] S2. The prepared soil and rock material is injected in layers into the test chamber assembly 30, whose inner walls are coated with lubricating grease. The pre-designed cushion material is buried below the pipe 4. After filling the soil to a certain height, the pipe 4 is buried. The soil is continued to be filled and the soil pressure cell sensor 2 is set at the predetermined position.

[0083] S3. After the backfilling is completed, release the hook 8 and unlock the sliding steel plate 16. According to the required load distribution pattern, place a matching force transmission frame on top of the soil material or do not place a force transmission frame.

[0084] S4. After the deformation of the soil and rock material has stabilized, install the support rod 18 and the measuring beam 17, and adjust the displacement sensor 21 on the measuring beam 17 so that it is positioned at the top, waist and bottom of the pipe 4.

[0085] S5. Start the jack 10, displacement sensor 21, earth pressure cell sensor 2 and various monitoring instruments to load the top surface of the soil and rock material. During the loading process, the pipe 4 moves downward synchronously with the compression deformation of the stratum. Since the sliding plate 16 can slide downward, the test chamber assembly 30 does not provide additional support force to both ends of the pipe 4.

[0086] S6. After recording the monitoring data of the displacement sensor 21, earth pressure cell sensor 2 and other monitoring instruments throughout the entire process, this round of testing ends;

[0087] S7. Replace with other types of padding materials and repeat S1 to S6 until the optimal padding material is found, at which point the test ends.

[0088] Example 5:

[0089] The test methods of the test apparatus include: pipe jacking test method;

[0090] The pipe jacking test method includes the following steps:

[0091] S1. The upward sliding plate 16 is suspended at a certain height by the hook 8;

[0092] S2. The prepared soil and rock material is injected in layers into the test chamber assembly 30, whose inner walls are coated with lubricating grease. After filling the soil to a certain height, the pipe 4 is buried. One section of the pipe 4 extends out of the test chamber assembly 30 through a round hole. Soil is continued to be filled and the soil pressure cell sensor 2 is set at the predetermined position.

[0093] S3. After the backfilling is completed, release the hook 8 and unlock the sliding steel plate 16. According to the required load distribution pattern, place a matching force transmission frame on top of the soil material or do not place a force transmission frame.

[0094] S4. Start the jack 10 and earth pressure cell sensor 2 to load the top surface of the soil and rock material. During the loading process, the pipe 4 moves downward synchronously with the compression deformation of the stratum. Since the sliding plate 16 can slide downward, the test chamber assembly 30 does not provide additional support force to both ends of the pipe 4.

[0095] S5. After the deformation of the soil and rock material has stabilized, select a suitable position on the reaction wall 26 to install the actuator 27, so that the axis of the actuator 27 coincides with the axis of the pipe 4, and the pipe 4 is connected to the actuator 27.

[0096] S6. The grout pump 22 delivers slurry to the outside of the pipeline 4 through the grout pipe 23 and the grouting hole;

[0097] S7. After the grouting is sufficient, start the actuator 27 to push the pipe 4 so that the pipe 4 moves in a uniform linear motion. PC29 records the pushing force of the actuator 27 throughout the process. This pushing force is the resistance force on the pipe 4. After pushing a specified distance, this round of test ends.

[0098] S8. Use mud materials with different proportions, adjust the distribution of grouting holes, and repeat S1 to S7 until the design with minimum resistance is found, obtain the optimal mud proportion and the optimal grouting hole distribution design, and the test ends.

[0099] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0100] In this embodiment of the utility model, during the synchronous downward movement of the pipeline 4 under the compression deformation of the stratum, the sliding plate 16 can move downward with the pipeline 4, reducing the support of the test chamber assembly 30 on the pipeline 4, restoring the real stress situation of the underground pipeline, and providing strong support for the design of various parameters in the construction of underground pipelines; including: being able to study and optimize the design of the subbase for buried pipe construction under different stratum characteristics and different load conditions, or to study and optimize the mud ratio and grouting hole layout for pipe jacking construction, and being able to study the grouting drag reduction mechanism through experimental phenomena and results.

[0101] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0102] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A test apparatus for optimizing underground pipeline construction parameters, characterized in that, The test apparatus includes: a test chamber assembly (30); The test chamber assembly (30) includes: a frame (3), tempered glass (5), double-layer steel plate (20), sliding plate (16), gantry beam (9) and load transfer frame (11); The front and back of the frame (3) are encapsulated with tempered glass (5); The left and right sides of the frame (3) are enclosed by double-layer steel plates (20) and sliding plates (16). The top beam (15) and bottom beam of the frame (3) are provided with strip holes (12) for the sliding plates (16) to slide vertically. The left and right sides of the frame (3) are enclosed by double-layer steel plates (20) on both sides of the sliding plates (16). The two sides of the sliding plates (16) are inserted into the gaps of the double-layer steel plates (20). The gantry beam (9) is installed on the top beam (15) by the bracket (13), and the load transfer frame (11) is installed at the bottom of the gantry beam (9) by the jack (10); The bracket (13) is provided with a support beam (6), and the support beam (6) is connected to a hook (8) by a rope (7). The hook (8) suspends the sliding plate (16) that is moving upward. The bottom of the sliding plate (16) in the suspended state is still accommodated in the strip hole (12) of the bottom beam. The sliding plate (16) has a circular hole in the middle for matching the pipe (4).

2. The experimental apparatus for optimizing underground pipeline construction parameters as described in claim 1, characterized in that, The top of the bracket (13) is provided with several supports (1), and the two ends of the support beam (6) are installed in the supports (1).

3. The experimental apparatus for optimizing underground pipeline construction parameters as described in claim 1, characterized in that, The test chamber assembly (30) contains soil and rock materials, and the pipe (4) is buried in the soil and rock materials. The two ends of the pipe (4) are aligned with the round hole, and the soil pressure box sensor (2) is buried above the pipe (4).

4. The experimental apparatus for optimizing underground pipeline construction parameters as described in claim 1, characterized in that, The testing apparatus further includes: a deformation measurement component; The deformation measurement assembly includes: a support rod (18), a measuring beam (17), and a displacement sensor (21). The outer wall of the frame (3) is provided with several hooks (19), and the two ends of the support rod (18) are installed in the hooks (19). A measuring beam (17) is erected between the two support rods (18) on the left and right sides of the frame (3). The measuring beam (17) passes through the round hole and the pipe (4). A displacement sensor (21) is fixed on the measuring beam (17) to monitor the deformation of the pipe (4) under the load applied by the load transfer frame (11).

5. The experimental apparatus for optimizing underground pipeline construction parameters as described in claim 1, characterized in that, The testing apparatus also includes: a jacking assembly; The jacking assembly includes: a reaction wall (26), an actuator (27), and a PC (29); The end of the pipe (4) is provided with a first flange (24). The reaction wall (26) has multiple sets of screw holes; The actuator (27) is provided with a second flange (25) and a third flange (28) at its two ends respectively. The first flange (24) is flange-connected to the second flange (25), and the third flange (28) is connected to the bolts and screw holes; The PC (29) is connected to the actuator (27) to control the extension and retraction of the actuator (27) and to record the jacking thrust of the actuator (27) throughout the process.

6. The experimental apparatus for optimizing underground pipeline construction parameters as described in claim 1, characterized in that, The test apparatus also includes: a slurry delivery assembly; The grouting assembly includes: a grouting pump (22) and a grouting pipe (23); The pipe wall of the pipe (4) is provided with grouting holes; The grout pump (22) is connected to the grouting hole through the grouting pipe (23) and is used to transport the slurry to the outside of the pipeline (4).

7. The experimental apparatus for optimizing underground pipeline construction parameters as described in claim 1, characterized in that, A force transmission frame is provided below the load transfer frame (11), and the force transmission frame includes: several I-beams; The extension direction of the I-beam is perpendicular to that of the load transfer frame (11), and the I-beam is placed on top of the soil and rock material.

8. The experimental apparatus for optimizing underground pipeline construction parameters as described in claim 1, characterized in that, A force transmission frame is provided below the load transfer frame (11), and the force transmission frame includes: a load plate (14) and several I-beams; The extension direction of the I-beam is perpendicular to that of the load transfer frame (11), the load plate (14) is placed on top of the soil material, and the I-beam is installed on top of the load plate (14).

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