CN116486672A - Underground structure still water buoyancy model test device - Google Patents
Underground structure still water buoyancy model test device Download PDFInfo
- Publication number
- CN116486672A CN116486672A CN202310469720.1A CN202310469720A CN116486672A CN 116486672 A CN116486672 A CN 116486672A CN 202310469720 A CN202310469720 A CN 202310469720A CN 116486672 A CN116486672 A CN 116486672A
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- water
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- pipe
- bottom end
- underground structure
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 219
- 238000012360 testing method Methods 0.000 title claims abstract description 35
- 239000002689 soil Substances 0.000 claims abstract description 26
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 13
- 230000002706 hydrostatic effect Effects 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 239000004576 sand Substances 0.000 abstract description 16
- 239000011148 porous material Substances 0.000 abstract description 14
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 238000004162 soil erosion Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 239000011888 foil Substances 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/12—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of liquids or gases
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/40—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for geology
Abstract
The invention discloses a static water buoyancy model test device of an underground structure, which belongs to the technical field of geotechnical indoor test devices and comprises an outer tank and an inner tank, wherein a water distribution mechanism is arranged in the outer tank, a water tank is arranged on the outer side of the outer tank, the water distribution mechanism is communicated with the water tank, and a plurality of water outlet slow flow heads are arranged at the bottom end of the water distribution mechanism; according to the invention, by arranging the water outlet slow flow head, water flow is ensured to slowly pass through sand when water injection is performed in a test, and soil erosion caused by too high speed when the water flow is contacted with the sand is avoided, so that a piping influence test is formed. The invention can regulate and control the sand-soil pore ratio by compressing the sand volume, and indirectly obtain the buoyancy value by combining the digital display push-pull force and the strain gauge, and the pore water pressure and the soil pressure are respectively measured by the pressure measuring tube and the soil pressure sensor, so that the invention provides data support for exploring the relativity of the pore water pressure, the soil pressure and the buoyancy of the underground structure and provides theoretical basis for exploring the action mechanism of the buoyancy of the underground structure.
Description
Technical Field
The invention belongs to the technical field of geotechnical indoor test devices, and particularly relates to a static water buoyancy model test device for an underground structure.
Background
Along with the development of economy, the development scale of underground space is larger and larger, a large amount of groundwater is generated in the pores of soil body and cracks of rock body, buoyancy effect is generated on an underground structure, buoyancy suffered by the underground structure is reasonably determined, and the safety, economy and reliability of underground engineering are important, so that the research on the buoyancy effect of groundwater in the foundation on the underground structure is of great scientific significance. Because of the lack of unified understanding of academia and engineering in theory, tests are currently being used as the most important and reliable research means.
In the prior art, a groundwater buoyancy effect simulation effect mainly adopts a groundwater buoyancy model with an underground structure, the model simulates the underground structure model, namely an inner box, by adjusting the weight and the water quality to achieve a critical state of buoyancy damage, and finally the buoyancy is obtained, but water flow can directly contact with a soil layer when flowing in from a water inlet, so that the contacted soil layer is easy to form scouring, a small-range piping phenomenon is caused, and the test is influenced. Therefore, it is needed to provide a model test device for the hydrostatic buoyancy of an underground structure, so as to solve the technical problems in the prior art.
Disclosure of Invention
The invention aims to provide a model test device for the hydrostatic buoyancy of an underground structure, which aims to solve the problems in the prior art.
In order to achieve the above purpose, the invention provides a static water buoyancy model test device of an underground structure, which comprises an outer box and an inner box arranged in the outer box, wherein the bottom end of the outer box is provided with a threaded hole, a connecting pipe is connected in the threaded hole in a threaded manner, a water distribution mechanism is arranged in the outer box, the top end of the connecting pipe is detachably connected with the water distribution mechanism, a water tank is arranged outside the outer box, a water pump is arranged in the water tank, the water outlet end of the water pump is communicated with the bottom end of the connecting pipe through a pipeline, a valve is arranged on the pipeline, and the pipeline is detachably connected with the connecting pipe; the bottom end of the water distribution mechanism is provided with a plurality of water outlet slow flow heads, and the bottom ends of the water outlet slow flow heads are in contact fit with the bottom wall of the outer box; the top fixedly connected with bracing piece of outer case, the bottom fixedly connected with digital display push-pull force meter of bracing piece, the bottom fixedly connected with connecting rod of digital display push-pull force meter, the bottom fixedly connected with foil gage of connecting rod, the foil gage set up in on the inboard bottom plate of inner box.
Preferably, the water distribution mechanism comprises a plurality of water supply pipes which are arranged in parallel, wherein two ends of each water supply pipe are sealed, the water supply pipes are arranged along the horizontal direction, a communicating pipe is arranged between two adjacent water supply pipes, and two ends of the communicating pipe are respectively communicated with the two water supply pipes; a threaded connector is arranged at the bottom end of any water supply pipe, and the top end of the connecting pipe is in threaded fit with the threaded connector; the bottom of any water supply pipe is provided with a plurality of water outlet slow flow heads, and the number of the water outlet slow flow heads on the same water supply pipe is not less than two.
Preferably, the water outlet slow flow head comprises a water outlet cap fixedly arranged at the bottom end of the water supply pipe, and a plurality of water outlet holes are formed in the bottom end of the water outlet cap; a floating plate is arranged in the water outlet cap and is in clearance fit with the inner wall of the water outlet cap; the water outlet cap is internally provided with a water outlet pipe, the top end of the water outlet pipe is fixedly communicated with the water supply pipe, the floating plate is arranged below the water outlet pipe, and a plurality of water outlet notches are formed in the side wall of the bottom of the water outlet pipe along the circumferential direction.
Preferably, the top fixedly connected with two connecting plates of play water cap, two the connecting plate symmetry sets up, the installing port has been seted up on the connecting plate, demountable installation has the sponge strip in the installing port, the bottom of sponge strip with the inboard bottom plate contact cooperation of outer case, the length direction of sponge strip is followed the axis direction setting of delivery pipe.
Preferably, pressing pieces are arranged on two opposite sides of the water outlet cap, each pressing piece comprises a baffle plate fixedly mounted on the water outlet cap, a telescopic rod is fixedly connected to the middle of the bottom end of each baffle plate, a pressing block is fixedly connected to the bottom end of each telescopic rod, the bottom end of each pressing block is abutted to the corresponding sponge strip, the pressing blocks are in sliding fit with the connecting plates, and the width of each pressing block is not smaller than that of each mounting opening; the bottom end of the baffle is fixedly connected with a telescopic pipe, the bottom end of the telescopic pipe is fixedly connected with the pressing block, and the telescopic rod is sleeved on the inner side of the telescopic pipe; the telescopic pipe is internally provided with a spring, the spring is sleeved on the telescopic rod, and two ends of the spring are respectively abutted with the pressing block and the baffle.
Preferably, the inner diameter of the top end of the water outlet hole is smaller than the inner diameter of the bottom end of the water outlet hole.
Preferably, a sealing plate is fixedly sleeved on the outer wall of the connecting pipe, a ring groove is formed in the bottom end of the sealing plate, and the connecting pipe and the ring groove are coaxially arranged; and a sealing ring is fixedly arranged in the annular groove and is abutted with the bottom plate of the outer box.
Preferably, a plurality of pressure measuring pipes are arranged on any side wall of the outer box, and the plurality of pressure measuring pipes are arranged in the vertical direction.
Preferably, four right angle positions on the outer side of the bottom of the inner box are provided with soil pressure sensors, and four right angle positions on the top end of the inner box are provided with displacement sensors.
Preferably, the bottom of the outer box is detachably provided with a supporting frame.
Compared with the prior art, the invention has the following advantages and technical effects:
according to the underground structure hydrostatic buoyancy model test device, through the arrangement of the water outlet slow flow head, water flow can be enabled to slowly pass through sand when water injection is tested, and the phenomenon that soil layers are scoured and piping influences are formed due to too high speed when water flow is contacted with the sand is avoided. The invention can regulate and control the sand-soil pore ratio by compressing the sand volume, and indirectly obtain the buoyancy value by combining the digital display push-pull force and the strain gauge, and the pore water pressure and the soil pressure are respectively measured by the pressure measuring tube and the soil pressure sensor, so that the invention provides data support for exploring the relativity of the pore water pressure, the soil pressure and the buoyancy of the underground structure and provides theoretical basis for further exploring the action mechanism of the buoyancy of the underground structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a test device for a model of the hydrostatic buoyancy of an underground structure;
FIG. 2 is an enlarged view of a portion of FIG. 1A in accordance with the present invention;
FIG. 3 is a top view of the water distribution mechanism of the present invention;
the device comprises an outer box-1, an inner box-2, a connecting pipe-3, a water tank-4, a water pump-5, a pipeline-6, a valve-7, a supporting rod-8, a digital display push-pull meter-9, a connecting rod-10, a strain gauge-11, a water supply pipe-12, a communicating pipe-13, a threaded interface-14, a water outlet cap-15, a water outlet hole-16, a floating plate-17, a water outlet pipe-18, a water outlet notch-19, a connecting plate-20, a sponge strip-21, a baffle-22, a telescopic rod-23, a pressing block-24, a telescopic pipe-25, a spring-26, a sealing plate-27, a sealing ring-28, a pressure measuring pipe-29, a soil pressure sensor-30, a displacement sensor-31 and a supporting frame-32.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present invention. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The invention provides a static water buoyancy model test device of an underground structure, which comprises an outer box 1 and an inner box 2 arranged in the outer box 1, wherein a threaded hole is formed in the bottom end of the outer box 1, a connecting pipe 3 is connected in the threaded hole in a threaded way, a water distribution mechanism is arranged in the outer box 1, the top end of the connecting pipe 3 is detachably connected with the water distribution mechanism, a water tank 4 is arranged on the outer side of the outer box 1, a water pump 5 is arranged in the water tank 4, the water outlet end of the water pump 5 is communicated with the bottom end of the connecting pipe 3 through a pipeline 6, a valve 7 is arranged on the pipeline 6, and the pipeline 6 is detachably connected with the connecting pipe 3; the bottom end of the water distribution mechanism is provided with a plurality of water outlet slow flow heads, and the bottom ends of the water outlet slow flow heads are in contact fit with the bottom wall of the outer box 1; the top fixedly connected with bracing piece 8 of outer tank 1, the bottom fixedly connected with digital display push-pull force meter 9 of bracing piece 8, the bottom fixedly connected with connecting rod 10 of digital display push-pull force meter 9, the bottom fixedly connected with foil gage 11 of connecting rod 10, foil gage 11 sets up on the inboard bottom plate of inner tank 2.
Furthermore, in order to facilitate the assembly and disassembly of the test device and to enable rapid water injection during the test, the water distribution mechanism comprises a plurality of water supply pipes 12 which are arranged in parallel, wherein two ends of the water supply pipes 12 are sealed, the water supply pipes 12 are arranged along the horizontal direction, a communicating pipe 13 is arranged between two adjacent water supply pipes 12, and two ends of the communicating pipe 13 are respectively communicated with the two water supply pipes 12; the bottom end of any water supply pipe 12 is provided with a screwed joint 14, and the top end of the connecting pipe 3 is in screwed fit with the screwed joint 14; the bottom of any water supply pipe 12 is provided with a plurality of water outlet slow flow heads, and the number of the water outlet slow flow heads on the same water supply pipe 12 is not less than two.
Further, in order to reduce the flow rate of water during water injection and avoid piping, the water outlet slow flow head comprises a water outlet cap 15 fixedly arranged at the bottom end of the water supply pipe 12, and a plurality of water outlet holes 16 are formed in the bottom end of the water outlet cap 15; a floating plate 17 is arranged in the water outlet cap 15, and the floating plate 17 is in clearance fit with the inner wall of the water outlet cap 15; a water outlet pipe 18 is arranged in the water outlet cap 15, the top end of the water outlet pipe 18 is fixedly communicated with the water supply pipe 12, the floating plate 17 is arranged below the water outlet pipe 18, and a plurality of water outlet notches 19 are formed in the side wall of the bottom of the water outlet pipe 18 along the circumferential direction.
In order to further reduce the flow rate of water during water injection, two connecting plates 20 are fixedly connected to the top end of the water outlet cap 15, the two connecting plates 20 are symmetrically arranged, mounting openings are formed in the connecting plates 20, sponge strips 21 are detachably mounted in the mounting openings, the bottom ends of the sponge strips 21 are in contact fit with the inner bottom plate of the outer box 1, and the length direction of the sponge strips 21 is arranged along the axis direction of the water supply pipe 12.
Further, in order to avoid that when sand is filled in the outer box 1, the sponge strip 21 deforms under the action of the sand, so that the sponge strip 21 cannot function, pressing pieces are arranged on two opposite sides of the water outlet cap 15, each pressing piece comprises a baffle 22 fixedly arranged on the water outlet cap 15, a telescopic rod 23 is fixedly connected to the middle of the bottom end of the baffle 22, a pressing block 24 is fixedly connected to the bottom end of the telescopic rod 23, the bottom end of the pressing block 24 is abutted to the sponge strip 21, the pressing block 24 is in sliding fit with the connecting plate 20, and the width of the pressing block 24 is not smaller than the width of the mounting port; the bottom end of the baffle 22 is fixedly connected with a telescopic pipe 25, the bottom end of the telescopic pipe 25 is fixedly connected with a pressing block 24, and the telescopic rod 23 is sleeved on the inner side of the telescopic pipe 25; a spring 26 is arranged in the telescopic pipe 25, the spring 26 is sleeved on the telescopic rod 23, and two ends of the spring 26 are respectively abutted with the pressing block 24 and the baffle 22.
Further, in order to reduce the flow rate of water flowing out of the water outlet cap 15, the top end inner diameter of the water outlet hole 16 is designed to be smaller than the bottom end inner diameter of the water outlet hole 16.
Further, in order to prevent water in the outer box 1 from seeping out from a threaded hole at the bottom and affecting test results, a sealing plate 27 is fixedly sleeved on the outer wall of the connecting pipe 3, a ring groove is formed in the bottom end of the sealing plate 27, and the connecting pipe 3 and the ring groove are coaxially arranged; a sealing ring 28 is fixedly arranged in the ring groove, and the sealing ring 28 is abutted with the bottom plate of the outer box 1.
Further, in order to explore pore water pressure suffered by the underground structure, a plurality of pressure measuring pipes 29 are installed on any side wall of the outer box 1, and the plurality of pressure measuring pipes 29 are arranged along the vertical direction.
Further, in order to explore pore water pressure suffered by the underground structure, soil pressure sensors 30 are respectively arranged at four right angles on the outer side of the bottom of the inner box 2, and displacement sensors 31 are respectively arranged at four right angles on the top end of the inner box 2 in order to conveniently measure displacement generated by the inner box 2 under buoyancy.
Further, the bottom end of the outer case 1 is detachably provided with a supporting frame 32.
The invention provides a device for testing a static water buoyancy model of an underground structure, which comprises the following specific steps:
s1, assembling a test device, mounting a connecting pipe 3 at the bottom of an outer box 1, connecting a water distribution mechanism with the connecting pipe 3 through a threaded interface 14, and then connecting the connecting pipe 3 with a water pump 5 in a water tank 4 through a pipeline 6;
s2, filling soil layer by layer, and tamping and compacting the sand uniformly to a required pore ratio;
s3, installing a soil pressure sensor 30, a strain gauge 11, a displacement sensor 31 and a digital display push-pull gauge 9 on the inner box 2, burying the inner box 2 into the outer box 1 according to the designed embedded height of the inner box 2, and continuously filling soil to the designed ground height;
s4, opening the water pump 5 and the valve 7 to fill water into the outer tank 1, water in the water tank 4 sequentially enters the water outlet cap 15 through the pipeline 6, the connecting pipe 3, the water supply pipe 12 and the water outlet pipe 18, flows out of the water outlet cap 15 through the water outlet hole 16 at the bottom of the water outlet cap 15 and is absorbed by the sponge strip 21, water is filled into the outer tank 1 through the sponge strip 21, the water pump 5 and the valve 7 can be controlled, low-speed inflow of water can be ensured, water can be prevented from directly flushing onto the sponge strip 21 through the arrangement of the floating plate 17, and the flow speed can be reduced when water flows out of the water outlet cap 15 due to the fact that the top inner diameter of the water outlet hole 16 is smaller than the bottom inner diameter of the water outlet hole 16, and the floating plate 17 in the water outlet cap 15 can play a certain blocking role on the water outlet pipe 18 under the action of buoyancy of water, and at the moment, the water in the water outlet pipe 18 can only flow out of the water outlet notch 19 on the water outlet pipe 18, so that the flow speed can be further reduced, and the flow speed can be reduced even if the opening degree of the valve 7 is forgotten to be adjusted; stopping water injection after the water level rises by 10 cm-15 cm each time, and stopping water injection again after the water level is stable until sand in the outer box 1 is completely saturated by penetration, and closing the water pump 5 and the valve 7;
s5, after sand in the outer box 1 is completely saturated, the numerical values of the digital display push-pull force meter 9, the pressure measuring tube 29, the soil pressure sensor 30 and the displacement sensor 31 are stable, and the numerical values of buoyancy, pore water pressure, soil stress and displacement of the inner box 2 are recorded;
s6, disconnecting the pipeline 6 from the water outlet end of the water pump 5, opening the valve 7, and recording corresponding values after the values of the digital display push-pull force meter 9, the pressure measuring tube 29, the soil pressure sensor 30 and the displacement sensor 31 are stabilized again because the bottom of the outer tank 1 is higher than the water tank 4 due to the arrangement of the support frame 32, and the water in the outer tank 1 flows back to the water tank 4 through the sponge strip 21, the water outlet cap 15, the water outlet pipe 18, the water supply pipe 12, the connecting pipe 3 and the pipeline 6 in sequence under the action of atmospheric pressure;
s7, taking out the sand in the outer box 1, enabling the test device to recover to a state before the test, repeating the operations of the steps S2-S6 by using the sand with different pore ratios, and recording data.
According to the invention, by arranging the water outlet slow flow head, water flow can be ensured to slowly pass through sand when water injection is performed in a test, and soil erosion caused by too high speed when water flow is contacted with the sand is avoided, so that a piping influence test is formed. In addition, the invention can regulate and control the sand-to-soil void ratio by compressing the sand volume, and indirectly obtain the buoyancy value by combining the digital display push-pull force and the strain gauge 11, and the pore water pressure and the soil pressure are respectively measured by the pressure measuring tube 29 and the soil pressure sensor 30, thereby providing data support for exploring the relativity of the pore water pressure, the soil pressure and the buoyancy of the underground structure and providing theoretical basis for further exploring the action mechanism of the buoyancy of the underground structure.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a static water buoyancy model test device of underground structure, its characterized in that, including outer case (1) and set up in inner box (2) in outer case (1), threaded hole has been seted up to outer case (1) bottom, threaded hole threaded connection has connecting pipe (3), the inside water distribution mechanism that is provided with of outer case (1), the top of connecting pipe (3) with water distribution mechanism detachably connects, outer case (1) outside is provided with water tank (4), install water pump (5) in water tank (4), the play water end of water pump (5) with the bottom of connecting pipe (3) is through pipeline (6) intercommunication, install valve (7) on pipeline (6), just pipeline (6) with connecting pipe (3) detachably connects; the bottom end of the water distribution mechanism is provided with a plurality of water outlet slow flow heads, and the bottom ends of the water outlet slow flow heads are in contact fit with the bottom wall of the outer box (1); the novel digital display push-pull device is characterized in that a supporting rod (8) is fixedly connected to the top end of the outer box (1), a digital display push-pull force meter (9) is fixedly connected to the bottom of the supporting rod (8), a connecting rod (10) is fixedly connected to the bottom end of the digital display push-pull force meter (9), a strain gauge (11) is fixedly connected to the bottom end of the connecting rod (10), and the strain gauge (11) is arranged on an inner bottom plate of the inner box (2).
2. The underground structure hydrostatic buoyancy model test device according to claim 1, wherein the water distribution mechanism comprises a plurality of water supply pipes (12) which are arranged in parallel, two ends of the water supply pipes (12) are sealed, the water supply pipes (12) are arranged along the horizontal direction, a communicating pipe (13) is arranged between two adjacent water supply pipes (12), and two ends of the communicating pipe (13) are respectively communicated with the two water supply pipes (12); a threaded connector (14) is arranged at the bottom end of any water supply pipe (12), and the top end of the connecting pipe (3) is in threaded fit with the threaded connector (14); the bottom of any water supply pipe (12) is provided with a plurality of water outlet slow flow heads, and the number of the water outlet slow flow heads on the same water supply pipe (12) is not less than two.
3. The underground structure still water buoyancy model test device according to claim 2, wherein the water outlet slow flow head comprises a water outlet cap (15) fixedly arranged at the bottom end of the water supply pipe (12), and a plurality of water outlet holes (16) are formed in the bottom end of the water outlet cap (15); a floating plate (17) is arranged in the water outlet cap (15), and the floating plate (17) is in clearance fit with the inner wall of the water outlet cap (15); the water outlet cap (15) is internally provided with a water outlet pipe (18), the top end of the water outlet pipe (18) is fixedly communicated with the water supply pipe (12), the floating plate (17) is arranged below the water outlet pipe (18), and a plurality of water outlet notches (19) are formed in the side wall of the bottom of the water outlet pipe (18) along the circumferential direction.
4. The underground structure still water buoyancy model test device according to claim 3, wherein the top end of the water outlet cap (15) is fixedly connected with two connecting plates (20), the two connecting plates (20) are symmetrically arranged, a mounting opening is formed in each connecting plate (20), a sponge strip (21) is detachably mounted in each mounting opening, the bottom end of each sponge strip (21) is in contact fit with an inner bottom plate of the outer box (1), and the length direction of each sponge strip (21) is arranged along the axis direction of the water supply pipe (12).
5. The underground structure hydrostatic buoyancy model test device according to claim 4, wherein pressing pieces are arranged on two opposite sides of the water outlet cap (15), each pressing piece comprises a baffle plate (22) fixedly installed on the water outlet cap (15), a telescopic rod (23) is fixedly connected to the middle of the bottom end of each baffle plate (22), a pressing block (24) is fixedly connected to the bottom end of each telescopic rod (23), the bottom end of each pressing block (24) is abutted to the corresponding sponge strip (21), the pressing blocks (24) are in sliding fit with the corresponding connecting plates (20), and the width of each pressing block (24) is not smaller than that of each mounting port; the bottom end of the baffle (22) is fixedly connected with a telescopic pipe (25), the bottom end of the telescopic pipe (25) is fixedly connected with the pressing block (24), and the telescopic rod (23) is sleeved on the inner side of the telescopic pipe (25); a spring (26) is arranged in the telescopic pipe (25), the spring (26) is sleeved on the telescopic rod (23), and two ends of the spring (26) are respectively abutted to the pressing block (24) and the baffle plate (22).
6. A model test device for hydrostatic buoyancy of an underground structure according to claim 3, wherein the top end inner diameter of the water outlet hole (16) is smaller than the bottom end inner diameter of the water outlet hole (16).
7. The underground structure hydrostatic buoyancy model test device according to claim 1, wherein a sealing plate (27) is fixedly sleeved on the outer wall of the connecting pipe (3), an annular groove is formed in the bottom end of the sealing plate (27), and the connecting pipe (3) and the annular groove are coaxially arranged; and a sealing ring (28) is fixedly arranged in the annular groove, and the sealing ring (28) is abutted with the bottom plate of the outer box (1).
8. The underground structure hydrostatic buoyancy model test device according to claim 1, wherein a plurality of pressure measuring pipes (29) are installed on any side wall of the outer box (1), and the plurality of pressure measuring pipes (29) are arranged in the vertical direction.
9. The underground structure hydrostatic buoyancy model test device according to claim 8, wherein four right-angle positions of the outer side of the bottom of the inner box (2) are respectively provided with a soil pressure sensor (30), and four right-angle positions of the top end of the inner box (2) are respectively provided with a displacement sensor (31).
10. The underground structure hydrostatic buoyancy model test device according to claim 1, wherein a supporting frame (32) is detachably arranged at the bottom end of the outer box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310469720.1A CN116486672B (en) | 2023-04-26 | 2023-04-26 | Underground structure still water buoyancy model test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310469720.1A CN116486672B (en) | 2023-04-26 | 2023-04-26 | Underground structure still water buoyancy model test device |
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| Publication Number | Publication Date |
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| CN116486672A true CN116486672A (en) | 2023-07-25 |
| CN116486672B CN116486672B (en) | 2023-12-05 |
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| CN202310469720.1A Active CN116486672B (en) | 2023-04-26 | 2023-04-26 | Underground structure still water buoyancy model test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116983752A (en) * | 2023-09-26 | 2023-11-03 | 太原吕泰生物科技有限公司 | Precise filtering device and method for disinfectant production |
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