Pipe jacking model test device crossing multiple stratums
By simulating a variety of formations in the pipe jacking model test device and monitoring parameters during the jacking process in real time, the problem that traditional test devices cannot effectively simulate the complexity of the formation is solved, and more comprehensive and accurate test data is achieved.
Patent Information
- Application Number
- CN202411228739.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-01-21
AI Technical Summary
The traditional hoisting model test device cannot effectively simulate the variability and complexity of the formation in actual engineering, resulting in insufficient comprehensive test data.
A pipe jacking model test device spanning various formations is designed. By pouring different geological materials into the interior of the formation simulation module box, various formations are simulated, and an air pump is used to drive the sheet air bag to squeeze the module box to achieve Close fit of formation simulation. At the same time, the pipe jacking structure has built-in displacement sensors and jacking force sensors to monitor the jacking force and displacement changes during the jacking process in real time.
It achieves effective simulation of a variety of formations, expands the comprehensiveness of test data, can more realistically simulate the progress of pipe jacking under different formation conditions, and provides more accurate test data.
Smart Images
Figure CN119334404A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of formation jacking pipe test devices, in particular to a jacking pipe jacking model test device spanning multiple formations. Background Art
[0002] In order to verify the effectiveness of the jacking construction design, including the jacking path, diameter, material and construction method, it is usually necessary to conduct a jacking test, that is, to detect various data by jacking the jacking pipe in the formation. In the traditional technical solution, homogeneous soil or sand is placed in the test platform as a simulated formation, and the progress of the jacking pipe is observed by controlling the jacking speed and jacking force to complete the jacking test of the formation.
[0003] A patent document with publication number CN102278117B discloses a parallel jacking construction simulation device in the field of construction engineering technology, including: a simulation box, connecting pipe sections, a supporting mechanism, a construction simulation mechanism and a test module. The simulation box is provided with a simulated soil body and multiple connecting pipe sections run through the simulation box in parallel. The supporting mechanism and the construction simulation structure are respectively arranged at both ends of the connecting pipe sections, and the test module is connected to the simulation box.
[0004] In the traditional technical scheme, when conducting a jacking model test, homogeneous soil or sand is placed in a simulation box as a simulated stratum, and then the jacking pipe is pushed into this simulated stratum to complete the test process. However, this method ignores the variability and complexity of the strata in actual projects. In actual projects, the jacking pipe does not only contact one type of soil when it is jacking. Therefore, the test data of the traditional technical scheme is not comprehensive enough.
[0005] To this end, the present invention provides a pipe jacking model test device that spans multiple strata. Summary of the invention
[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.
[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: a pipe jacking model test device across multiple strata described in the present invention comprises a jacking member and a test box fixedly installed on one side of the jacking member, a jacking pipe structure is installed inside the jacking member, an air pump is installed on the side of the test box, and a formation simulation module box 1, a formation simulation module box 2 and a formation simulation module box 3 are slidably installed inside the test box, and the formation simulation module box 1, the formation simulation module box 2 and the formation simulation module box 3 are components made of the same structure;
[0008] The jacking pipe structure includes a jacking pipe and multiple loading pipes, a displacement sensor is fixedly installed inside one end of the jacking pipe, a through groove is penetrated through the test box toward the position of the jacking component, channel components are installed on both sides of the formation simulation module box one, and the channel components are used to open the channels outside and inside the formation simulation module box one, and different geological materials are poured into the formation simulation module box one, the formation simulation module box two and the formation simulation module box three.
[0009] Preferably, the jacking member includes a plurality of advancement columns and a pushing block, wherein an embedding groove is provided inside the pushing block, a jacking force sensor is installed on the inner wall of the embedding groove, and the pushing block is movably installed with the plurality of advancement columns.
[0010] Preferably, a bottom opening groove is opened on the bottom side of the test box, and a plurality of bottom fixing columns are fixedly installed above the bottom opening groove. The plurality of bottom fixing columns are located at the inner bottom of the test box, and a heating and cooling component is installed inside the test box.
[0011] Preferably, a sheet-like airbag is fixedly mounted on the inner wall of the test box away from the jacking member, and the sheet-like airbag is connected to an air pump, and the air pump is used to supply air to the interior of the sheet-like airbag.
[0012] Preferably, a plurality of resistance strain gauge pressure sensors are inserted into various positions in the geological materials inside the formation simulation module box one, the formation simulation module box two and the formation simulation module box three.
[0013] Preferably, the formation simulation module box includes a top cover and two side panels fixedly installed directly below the top cover, a bottom plate fixedly installed below the two side panels, and two plastic layers fixedly installed between the top cover and the bottom plate. The two plastic layers and the side panels, the top cover and the bottom plate constitute an enclosed space, the channel component is installed inside the plastic layer, and a flip cover plate is movably installed inside the top cover.
[0014] Preferably, the channel component includes a fixed plate fixedly installed inside the plastic layer, a through groove is provided inside the fixed plate, the through groove penetrates the outside world and the interior of the formation simulation module box, a sliding groove is provided inside the fixed plate, two sliding semicircular pieces are slidably installed inside the sliding groove, two spring guide columns and a connecting rope are fixedly installed on the side edges of the sliding semicircular pieces, one end of the two spring guide columns are fixedly connected to the inner wall of the sliding groove, and one end of the connecting rope extends out of the fixed plate and is located inside the plastic layer.
[0015] Preferably, a plurality of opening members are installed above the top cover, and the plurality of opening members include a sliding column slidably embedded in the top cover, one end of the sliding column is connected to a corresponding connecting rope, and a lifting round block is fixedly installed on the upper end of the sliding column.
[0016] Preferably, a through groove is opened inside the top cover, and a rectangular groove is opened inside the side plate, and the through groove and the rectangular groove are connected.
[0017] Preferably, groundwater simulation component one, groundwater simulation component two and groundwater simulation component three are fixedly installed inside the rectangular groove, the upper ends of the groundwater simulation component one, groundwater simulation component two and groundwater simulation component three are located on the upper side of the formation simulation module box one, the lengths of the groundwater simulation component one, groundwater simulation component two and groundwater simulation component three are gradually arranged, the groundwater simulation component one includes a flat water pipe and a water valve, and the water valve extends from the inside of the rectangular groove to the inside of the formation simulation module box one.
[0018] The beneficial effects of the present invention are as follows:
[0019] 1. The present invention discloses a pipe jacking model test device that spans multiple strata. Different geological materials are poured into the interior of formation simulation module box one, formation simulation module box two and formation simulation module box three to simulate multiple strata in actual work. Formation simulation module box one, formation simulation module box two and formation simulation module box three are sequentially embedded into the interior of the test box. The pipe jacking structure can be jacked into the interior of formation simulation module box two and formation simulation module box three to complete pipe jacking tests on multiple strata. Because the pressures of the pipe jacking structure fed to the jacking force sensor in different stratum materials are different, and a displacement sensor is provided at the end of the top pipe, the displacement sensor and the jacking force sensor are provided to monitor the changes in jacking force and displacement during the jacking process in real time.
[0020] 2. The present invention relates to a pipe jacking model test device that spans multiple strata. After formation simulation module box one, formation simulation module box two and formation simulation module box three are embedded into a test box, an air pump is used to inflate the interior of a sheet-like airbag. The sheet-like airbag is inflated and then squeezes the formation simulation module box one, formation simulation module box two and formation simulation module box three, so that the formation simulation module box one, formation simulation module box two and formation simulation module box three fit closely together, allowing the pipe jacking structure to be pushed into the geological material at all times.
[0021] 3. The jacking pipe model test device spanning multiple strata described in the present invention, when jacking through the jacking pipe structure inside the formation simulation module box one, the formation simulation module box two and the formation simulation module box three, will drive the movement of geological materials inside the formation simulation module box one, the formation simulation module box two and the formation simulation module box three, and resistance strain gauge pressure sensors are inserted at various positions of these geological materials. The moving geological materials will squeeze the resistance strain gauge pressure sensors, and the formation deformation and stress distribution can be understood to a certain extent through the pressure changes of the resistance strain gauge pressure sensors. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The present invention will be further described below in conjunction with the accompanying drawings.
[0023] Figure 1 It is an overall stereogram of the present invention;
[0024] Figure 2 It is a three-dimensional schematic diagram of the jacking pipe structure in the present invention;
[0025] Figure 3 It is a three-dimensional schematic diagram of the jacking member and the test box in the present invention;
[0026] Figure 4 It is a plan view of a formation simulation module box in the present invention;
[0027] Figure 5 It is a three-dimensional schematic diagram of a formation simulation module box in the present invention;
[0028] Figure 6 It is a three-dimensional schematic diagram of the channel component in the present invention;
[0029] Figure 7 It is a three-dimensional schematic diagram of the opening component in the present invention;
[0030] Figure 8 It is a three-dimensional schematic diagram of the groundwater simulation component in the present invention.
[0031] In the figure: 1, jacking member; 11, advancing column; 12, pushing block; 13, embedded groove; 14, jacking force sensor; 2, test box; 21, bottom fixed column; 22, through groove; 23, bottom opening groove; 24, sheet airbag; 3, jacking pipe structure; 31, loading pipe; 32, top pipe; 33, displacement sensor; 4, formation simulation module box 1; 41, top cover; 411, flip cover plate; 412, through strip groove; 42, bottom plate; 43, side plate; 431, rectangular groove; 44 , plastic layer; 45, groundwater simulation component one; 451, flat water pipe; 452, water valve; 46, groundwater simulation component two; 47, groundwater simulation component three; 5, formation simulation module box two; 6, formation simulation module box three; 7, air pump; 8, channel component; 81, fixed plate; 82, sliding semicircular piece; 821, spring guide column; 822, connecting rope; 811, through groove; 812, sliding groove; 9, opening component; 91, lifting round block; 92, sliding column. DETAILED DESCRIPTION
[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0033] Embodiment 1
[0034] like Figure 1-5 As shown, a pipe jacking model test device across multiple strata according to an embodiment of the present invention comprises a jacking member 1 and a test box 2 fixedly installed on one side of the jacking member 1, a jacking pipe structure 3 is installed inside the jacking member 1, an air pump 7 is installed on the side of the test box 2, a formation simulation module box 1 4, a formation simulation module box 2 5 and a formation simulation module box 3 6 are slidably installed inside the test box 2, and the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 are components made of the same structure;
[0035] The top pipe structure 3 includes a top pipe 32 and a plurality of loading pipes 31. A displacement sensor 33 is fixedly installed inside one end of the top pipe 32. A through slot 22 is provided through the test box 2 toward the jacking member 1. Channel members 8 are installed on both sides of the formation simulation module box 1 4. The channel members 8 are used to open the channels outside and inside the formation simulation module box 1 4. Different geological materials are poured into the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6.
[0036] The jacking member 1 includes a plurality of jacking columns 11 and a push block 12 . An embedding groove 13 is provided inside the push block 12 . A jacking force sensor 14 is installed on the inner wall of the embedding groove 13 . The push block 12 and the plurality of jacking columns 11 are movably installed.
[0037] Specifically, when conducting the pipe jacking test, firstly, different geological materials are poured into the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 to simulate various formations in actual work, and the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 are sequentially embedded in the test box 2, and then the top pipe 32 is taken and embedded in the embedded groove 13, and the push block 12 can slide through the advancement column 11 to push the top pipe 32 to move into the test box 2, and the top pipe 32 enters into the through groove 22. Inside the test box 2, the passage of the formation simulation module box 4 is opened through the channel member 8, so that one end of the top pipe 32 can enter the inside of the formation simulation module box 4. When the push block 12 moves to the limit position, one end of the top pipe 32 is located inside the formation simulation module box 4, and the top pipe 32 is still embedded in the through groove 22. At this time, the push block 12 moves away from the test box 2 and moves in the opposite direction to the limit position, and the embedded groove 13 is separated from the top pipe 32. A loading pipe 31 is embedded in the embedded groove 13, and then the push block 12 drives the loading pipe 31 to move, and the loading pipe 31 is moved. When the loading pipe 31 moves toward the top pipe 32, the loading pipe 31 will be integrated with the top pipe 32 to form a whole, and then the top force sensor 14 will push the whole top pipe structure 3 formed by the loading pipe 31 and the top pipe 32 to continue to push inside the formation simulation module box 1 4. A plurality of loading pipes 31 are provided. In the same way, the top pipe structure 3 can continuously increase its length, and then continuously push inside the test box 2, open the channel member 8 provided in the formation simulation module box 2 5 and the formation simulation module box 3 6, so that the top pipe structure 3 can push to the formation simulation module box 2 5 and the formation The interior of the simulation module box 3 6 is used to complete the jacking test of various strata, because the jacking feed pressure of the jacking structure 3 in different stratum materials and the jacking force sensor 14 are different, and a displacement sensor 33 is arranged at the end of the top pipe 32. The displacement sensor 33 and the jacking force sensor 14 are used to monitor the jacking force and displacement changes during the jacking process in real time. At the same time, the movement of the pushing block 12 is controlled by a programmable controller, which can realize the precise adjustment of the jacking speed, simulating the jacking of the jacking structure 3 in different geological materials, and the detected data is more in line with reality.
[0038] like Figure 3 As shown, a bottom opening groove 23 is opened on the bottom side of the test box 2, and a plurality of bottom fixing columns 21 are fixedly installed above the bottom opening groove 23. The plurality of bottom fixing columns 21 are located at the inner bottom of the test box 2, and a heating and cooling component is installed inside the test box 2.
[0039] A sheet-like airbag 24 is fixedly mounted on the inner wall of the test box 2 away from the jacking member 1 . The sheet-like airbag 24 is connected to an air pump 7 . The air pump 7 is used to supply air to the interior of the sheet-like airbag 24 .
[0040] Specifically, when the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 are embedded in the test box 2, the bottoms of the three are in contact with the multiple bottom fixing columns 21, and there are spacings between the multiple bottom fixing columns 21. When the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 open the channel through the channel member 8, the formation materials inside them may leak, and the leaked geological materials will fall into the inner bottom of the test box 2 through the multiple bottom fixing columns 21 and accumulate. These accumulated formation materials can be cleaned through the bottom opening groove 23. The interior of the test box 2 is equipped with heating and cooling components for simulating the formation environment under different temperature conditions. When the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 are embedded in the test box 2, the air pump 7 is used to inflate the interior of the sheet airbag 24. The sheet airbag 24 is inflated and then squeezes the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6, so that the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 fit closely together, so that the jacking structure 3 is always pushed into the geological material.
[0041] like Figure 4 As shown, a plurality of resistance strain gauge pressure sensors are inserted into various positions of the geological materials inside the formation simulation module box 1 4 , the formation simulation module box 2 5 and the formation simulation module box 3 6 .
[0042] Specifically, when the jacking pipe structure 3 is pushed into the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6, it will drive the movement of the geological materials inside the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6, and resistance strain gauge pressure sensors are inserted at various positions of these geological materials. The moving geological materials will squeeze the resistance strain gauge pressure sensors. The pressure changes of the resistance strain gauge pressure sensors can be used to understand the formation deformation and stress distribution to a certain extent.
[0043] like Figure 5 As shown, the formation simulation module box 4 includes a top cover 41 and two side panels 43 fixedly installed directly below the top cover 41, a bottom plate 42 is fixedly installed below the two side panels 43, and two plastic layers 44 are fixedly installed between the top cover 41 and the bottom plate 42. The two plastic layers 44 and the side panels 43, the top cover 41 and the bottom plate 42 constitute an enclosed space, the channel member 8 is installed inside the plastic layer 44, and a flip cover plate 411 is movably installed inside the top cover 41.
[0044] Specifically, geological materials are poured into the interior of the formation simulation module box 1 4 by flipping the flip cover plate 411, and a large amount of geological materials are poured into the interior of the formation simulation module box 1 4 until the plastic layer 44 is deformed and expanded outward. The same is true for the formation simulation module box 2 5 and the formation simulation module box 3 6. In this case, when the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 are embedded in the test box 2, the several sides of the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 can fit perfectly, and when the top pipe 32 is pushed into the formation simulation module box 1 4, it will also affect the formation materials inside the formation simulation module box 2 5 and the formation simulation module box 3 6, which is more in line with reality. When the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 are placed, the position of each channel component 8 is adjusted so that the multiple channel components 8 and the through groove 22 are on the same horizontal plane.
[0045] like Figure 6-7 As shown, the channel component 8 includes a fixed plate 81 fixedly installed inside the plastic layer 44, a through groove 811 is opened inside the fixed plate 81, and the through groove 811 penetrates the outside and the interior of the formation simulation module box 4, a sliding groove 812 is opened inside the fixed plate 81, and two sliding semicircular pieces 82 are slidably installed inside the sliding groove 812, and two spring guide columns 821 and a connecting rope 822 are fixedly installed on the side of the sliding semicircular piece 82, one end of the two spring guide columns 821 is fixedly connected to the inner wall of the sliding groove 812, and one end of the connecting rope 822 extends out of the fixed plate 81 and is located inside the plastic layer 44.
[0046] A plurality of opening members 9 are installed above the top cover 41 , and the plurality of opening members 9 include a sliding column 92 slidably embedded in the top cover 41 , one end of the sliding column 92 is connected to the corresponding connecting rope 822 , and a lifting round block 91 is fixedly installed on the upper end of the sliding column 92 .
[0047] Specifically, when it is necessary to open the channel of the formation simulation module box 4 through the channel component 8 to allow the top pipe structure 3 to enter the interior of the formation simulation module box 4, the lifting block 91 and the sliding column 92 are taken up and lifted. At this time, the connecting rope 822 will be pulled. The connecting rope 822 is originally loose inside the plastic layer 44. At this time, the spring of the spring guide column 821 is in a natural state, and the two sliding semicircular pieces 82 fit tightly, which can prevent the formation material inside the formation simulation module box 4 from leaking. The pulled connecting rope 822 will drive the sliding semicircular pieces 82 to move, that is, at this time, the two sliding semicircular pieces 82 move in the opposite direction inside the sliding groove 812, revealing the through groove 811. At this time, the top pipe structure 3 blocked on one side of the through groove 811 can continue to be pushed into the interior of the formation simulation module box 4, and the top pipe structure 3 can be pushed into the interior of the formation simulation module box 4 without affecting the deformation and movement of the formation material inside the formation simulation module box 4.
[0048] Embodiment 2
[0049] like Figure 7-8 As shown, compared with Example 1, another embodiment of the present invention is: a through groove 412 is opened inside the top cover 41, a rectangular groove 431 is opened inside the side plate 43, the through groove 412 and the rectangular groove 431 are connected, and a groundwater simulation component 1 45, a groundwater simulation component 2 46 and a groundwater simulation component 3 47 are fixedly installed inside the rectangular groove 431, the upper ends of the groundwater simulation component 1 45, the groundwater simulation component 2 46 and the groundwater simulation component 3 47 are located on the upper side of the formation simulation module box 1 4, the lengths of the groundwater simulation component 1 45, the groundwater simulation component 2 46 and the groundwater simulation component 3 47 are gradually changed, the groundwater simulation component 1 45 includes a flat water pipe 451 and a water valve 452, and the water valve 452 extends from the inside of the rectangular groove 431 to the inside of the formation simulation module box 1 4.
[0050] Specifically, in order to simulate the existence of groundwater in the stratum, water is poured into the flat water pipe 451. At this time, the water will drop through the flat water pipe 451 to the position of the water valve 452, and the water is poured into the stratum material through the water valve 452. Moreover, the water valve 452 is installed inside the through-slot 412 and the rectangular slot 431. Water can be poured into the jacking process to simulate groundwater. The effect of groundwater just entering the stratum on the jacking of the jacking structure 3 can be simulated. The water valves 452 set at different heights of the groundwater simulation component 1 45, the groundwater simulation component 2 46 and the groundwater simulation component 3 47 can be simulated to simulate the presence of groundwater in strata at different heights.
[0051] Working principle: When conducting a pipe jacking test, firstly, different geological materials are poured into the interior of the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 to simulate various formations in actual work, and the formation simulation module box 1 4, the formation simulation module box 2 5 and the formation simulation module box 3 6 are sequentially embedded into the interior of the test box 2, and then the top pipe 32 is taken and embedded into the inside of the embedding groove 13, and the pushing block 12 can slide through the advancing column 11 to push the top pipe 32 to move into the inside of the test box 2, and the top pipe 32 enters the interior of the test box 2 through the through groove 22, and the channel of the formation simulation module box 1 4 is opened through the channel component 8, so that one end of the top pipe 32 can enter the formation simulation module box 1 4, when the pushing block 12 moves to the extreme position, one end of the top pipe 32 is located inside the formation simulation module box 4, and the top pipe 32 is still embedded in the through groove 22. At this time, the pushing block 12 moves away from the test box 2 in the opposite direction to the extreme position, and the embedded groove 13 is separated from the top pipe 32. A loading pipe 31 is embedded in the embedded groove 13, and then the pushing block 12 drives the loading pipe 31 to move. When the loading pipe 31 moves toward the top pipe 32, the loading pipe 31 will be embedded with the top pipe 32 to form a whole, and then the overall top pipe structure 3 formed by the loading pipe 31 and the top pipe 32 is pushed again by the top force sensor 14 to continue to push inside the formation simulation module box 4. A plurality of loading pipes 31 are provided, and in the same way, the top pipe structure 3 can continuously increase its length, and then continuously push forward inside the test box 2, open the channel member 8 provided in the formation simulation module box 2 5 and the formation simulation module box 3 6, so that the jacking pipe structure 3 can be pushed forward into the interior of the formation simulation module box 2 5 and the formation simulation module box 3 6, to complete the jacking test of various formations, because the jacking feed and the jacking force sensor 14 of the jacking pipe structure 3 are different in different formation materials, and a displacement sensor 33 is provided at the end of the top pipe 32, and the displacement sensor 33 and the jacking force sensor 14 are provided for real-time monitoring of the jacking force and displacement changes during the jacking process, and at the same time, the movement of the push block 12 is controlled by a programmable controller, which can realize the precise adjustment of the jacking speed, simulating the jacking pipe structure 3 The data detected during the jacking in different geological materials are more in line with reality. In order to simulate the existence of groundwater in the stratum, water is poured into the flat water pipe 451. At this time, the water will drop through the flat water pipe 451 to the position of the water valve 452, and the water is poured into the stratum material through the water valve 452. Moreover, the water valve 452 is installed inside the through-slot 412 and the rectangular slot 431. Water can be poured into the jacking process to simulate groundwater. The influence of groundwater just entering the stratum on the jacking of the jacking structure 3 can be simulated. The water valves 452 set at different heights of the groundwater simulation component 1 45, the groundwater simulation component 2 46 and the groundwater simulation component 3 47 can be simulated to simulate the existence of groundwater in strata at different heights.
[0052] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A pipe jacking model test device for crossing multiple strata, comprising a jacking member (1) and a test box (2) fixedly mounted on one side of the jacking member (1), a jacking pipe structure (3) being mounted inside the jacking member (1), and an air pump (7) being mounted on the side of the test box (2), characterized in that: The test box (2) is internally slidably installed with a formation simulation module box one (4), a formation simulation module box two (5) and a formation simulation module box three (6), wherein the formation simulation module box one (4), the formation simulation module box two (5) and the formation simulation module box three (6) are components made of the same structure; The jacking pipe structure (3) comprises a jacking pipe (32) and a plurality of loading pipes (31), a displacement sensor (33) is fixedly installed inside one end of the jacking pipe (32), a through slot (22) is provided through the test box (2) towards the position of the jacking member (1), channel members (8) are installed on both sides of the formation simulation module box one (4), and the channel members (8) are used to open the channels outside and inside the formation simulation module box one (4), and different geological materials are filled inside the formation simulation module box one (4), the formation simulation module box two (5) and the formation simulation module box three (6); The jacking member (1) comprises a plurality of jacking columns (11) and a pushing block (12); a groove (13) is provided inside the pushing block (12); a jacking force sensor (14) is installed on the inner wall of the groove (13); and the pushing block (12) is movably installed with the plurality of jacking columns (11).
2. A pipe jacking model test device across various strata according to claim 1, characterized in that: A bottom opening groove (23) is provided on the bottom side of the test box (2), and a plurality of bottom fixing columns (21) are fixedly installed above the bottom opening groove (23).
3. The pipe jacking model test device across various strata according to claim 1 is characterized by: The plurality of bottom fixing columns (21) are located at the inner bottom of the test box (2), and a heating and cooling component is installed inside the test box (2).
4. The pipe jacking model test device across various strata according to claim 3 is characterized by: A sheet-like airbag (24) is fixedly mounted on the inner wall of the test box (2) away from the jacking member (1); the sheet-like airbag (24) is connected to an air pump (7); and the air pump (7) is used to supply air to the interior of the sheet-like airbag (24).
5. The pipe jacking model test device across various strata according to claim 1 is characterized by: A plurality of resistance strain gauge pressure sensors are inserted into various positions of the geological materials inside the formation simulation module box one (4), the formation simulation module box two (5) and the formation simulation module box three (6).
6. The pipe jacking model test device across various strata according to claim 1 is characterized by: The formation simulation module box (4) comprises a top cover (41) and two side panels (43) fixedly installed directly below the top cover (41), a bottom plate (42) fixedly installed below the two side panels (43), two plastic layers (44) fixedly installed between the top cover (41) and the bottom plate (42), the two plastic layers (44) and the side panels (43), the top cover (41) and the bottom plate (42) form a closed space, the channel component (8) is installed inside the plastic layer (44), and a flip cover plate (411) is movably installed inside the top cover (41).
7. The pipe jacking model test device across various strata according to claim 6 is characterized by: The channel component (8) includes a fixed plate (81) fixedly installed inside the plastic layer (44), a through groove (811) is provided inside the fixed plate (81), and the through groove (811) penetrates the outside and the inside of the formation simulation module box (4), a sliding groove (812) is provided inside the fixed plate (81), and two sliding semicircular pieces (82) are slidably installed inside the sliding groove (812), and two spring guide pillars (821) and a connecting rope (822) are fixedly installed on the side of the sliding semicircular piece (82), one end of the two spring guide pillars (821) is fixedly connected to the inner wall of the sliding groove (812), and one end of the connecting rope (822) extends out of the fixed plate (81) and is located inside the plastic layer (44).
8. The pipe jacking model test device across various strata according to claim 7, characterized in that: A plurality of opening members (9) are installed above the top cover (41), and the plurality of opening members (9) include a sliding column (92) slidably embedded in the interior of the top cover (41), one end of the sliding column (92) is connected to a corresponding connecting rope (822), and a lifting round block (91) is fixedly installed on the upper end of the sliding column (92).
9. The pipe jacking model test device across various strata according to claim 6, characterized in that: A through groove (412) is formed inside the top cover (41), and a rectangular groove (431) is formed inside the side plate (43), and the through groove (412) and the rectangular groove (431) are connected.
10. The pipe jacking model test device across various strata according to claim 9, characterized in that: A groundwater simulation component 1 (45), a groundwater simulation component 2 (46) and a groundwater simulation component 3 (47) are fixedly installed inside the rectangular groove (431); the upper ends of the groundwater simulation component 1 (45), the groundwater simulation component 2 (46) and the groundwater simulation component 3 (47) are located on the upper side of the formation simulation module box 1 (4); the lengths of the groundwater simulation component 1 (45), the groundwater simulation component 2 (46) and the groundwater simulation component 3 (47) are gradually changed; the groundwater simulation component 1 (45) includes a flat water pipe (451) and a water valve (452); the water valve (452) extends from the inside of the rectangular groove (431) to the inside of the formation simulation module box 1 (4).
Citation Information
Patent Citations
Parallel pipe jacking construction simulation device
CN102278117B