CN215053303U - Guide-enhanced barrel-type foundation penetration test model device - Google Patents
Guide-enhanced barrel-type foundation penetration test model device Download PDFInfo
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- CN215053303U CN215053303U CN202023084277.7U CN202023084277U CN215053303U CN 215053303 U CN215053303 U CN 215053303U CN 202023084277 U CN202023084277 U CN 202023084277U CN 215053303 U CN215053303 U CN 215053303U
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a guide-enhanced barrel-shaped foundation penetration test model device, which comprises a test system, a water supply system and a negative pressure adjusting system; the test system comprises a mounting top cover, a foundation guide device, a model box and a barrel-shaped foundation; the design of mounting the top cover reduces the number of cylinder walls, thereby reducing energy consumption; the foundation guide device ensures that the offshore barrel type foundation model keeps vertical in the injection process, and avoids test errors; the water inlet valve is provided with the reverse filtering geotextile, so that the water inlet pressure can be reduced, and the water surface fluctuation can be reduced; the perforated bottom plate of the L-shaped wave-absorbing plate can weaken the scouring effect of water flow on the soil layer in the water adding process of the test, and the perforated side wall can eliminate water waves generated in the water adding process of the water inlet valve; the utility model discloses can be used to offshore formula bucket type basis installation, the process of running through under the simulation marine environment.
Description
Technical Field
The utility model relates to a bucket type basis of direction reinforcing is sunk and is run through experimental model device can be used to offshore formula bucket type basis installation, the process of running through under the simulation marine environment.
Background
With the strategic deployment of building oceanic reinforcement and developing oceanic economy in China, in order to improve the development capability of ocean resources and accelerate the development of oceanic regional economy, the offshore bucket foundation is widely applied to various oceanic engineering such as shoreline protection, harbor construction, important island construction, offshore engineering and the like.
In recent years, the offshore bucket foundation is widely applied to ocean engineering such as an oil extraction platform foundation, a wind power tower foundation, a breakwater foundation, seaport construction and the like in the marine oil industry, wherein the adopted technology for installing the top cover of the offshore bucket foundation realizes the excavation-free installation of the offshore bucket foundation in a complex ocean environment, can be used for preventing and treating the damage of seabed liquefaction to the offshore bucket foundation engineering, and simultaneously can accelerate the construction speed, reduce the energy consumption, reduce the construction cost and shorten the construction period.
In the current ocean engineering, the mounting top cover of the offshore bucket foundation is not used as a piling device in excavation-free construction, so that a related excavation-free design calculation method and a related construction technology are still to be perfected, and compared with a theoretical analysis method and a numerical method, a set model is adopted for research, and calculated data has higher dependence on calculation parameter selection; the real-time monitoring of the dynamic change of the seabed is difficult to realize by the method of engineering actual measurement, and the method has the advantages of high actual measurement cost, high technical requirement index, high monitoring difficulty and great dependence on environmental conditions. In view of the fact that the soil body microstructure is not influenced by the normal gravity lower model test, the penetration speed of the barrel-shaped foundation installation device and the frictional resistance between the barrel wall and the soil body are consistent with the test condition, and the sinking and penetrating process of the barrel-shaped foundation in the actual engineering can be effectively simulated so as to achieve the test purpose.
Therefore, in order to perfect a non-excavation design calculation method and a related construction technology, determine negative pressure and penetration speed required by the penetration of an offshore bucket foundation, the magnitude of the frictional resistance between a bucket wall and a soil body and the influence of the installation process of the bucket foundation on the surrounding environment, a simple and effective bucket foundation penetration test model device is urgently needed.
Disclosure of Invention
For overcoming the deficiencies of the prior art, the utility model provides a barrel type basis of direction reinforcing is sunk and is run through experimental model device.
The utility model provides a technical scheme that its technical problem adopted is: a guide-enhanced barrel-type foundation penetration test model device comprises a test system, a water supply system and a negative pressure adjusting system; the test system comprises a mounting top cover, a foundation guide device, a model box and a barrel-shaped foundation; the water supply system comprises a water supply device, a water inlet valve and a wave-absorbing plate; the negative pressure adjusting system comprises a water-gas separating device and a vacuum pump;
the mounting top cover consists of a top cover main body and a level gauge; the top cover main body is provided with a first vacuum meter and a vent hole which penetrate through the top cover main body, and a level gauge is fixed on the upper surface of the top cover main body; an air exhaust valve is arranged on the vent hole; the bottom of the vent hole is provided with a first reverse filtering geotextile;
the barrel-shaped foundation is hermetically connected with the top cover main body through a rubber ring; the rubber ring is further connected with the top cover main body in a sealing mode through a U-shaped clamp; at least one row of micro pore water pressure sensors are fixed on the outer wall of the barrel-shaped foundation along the vertical direction;
the base guiding device comprises semicircular steel rings, metal arms, rollers and rolling rails which are symmetrically arranged, the rolling rails are vertically and rightly arranged on the front side wall and the rear side wall of the model box, the two semicircular steel rings are detachably connected, a plurality of rolling balls are arranged on the inner walls of the semicircular steel rings, and the barrel-shaped base penetrates through the semicircular steel rings and is in contact with the rolling balls; one end of the metal arm is connected with the semicircular steel ring, the other end of the metal arm is connected with the roller wheel, and the roller wheel can roll and stop in the rolling track;
the model box consists of five organic glasses at the front, the back, the left and the right and at the bottom; a water inlet valve is arranged at the top of the left side wall of the model box, the water inlet valve is connected with a water supply device, and a fourth reverse filter geotextile is arranged at a water outlet; a bottom cushion layer and saturated soil are distributed in the model box from bottom to top, and air-free water is injected; the saturated soil is used for simulating a seabed; the water without air is used for simulating a seawater environment; a first drainage valve is arranged at the bottom of the right side wall of the model box; a second anti-filtration geotextile is arranged at the inner opening of the first drainage valve; a second drain valve is arranged at the top of the right side wall of the model box; the inner opening of the second drain valve is provided with a third reverse filter geotextile, and the outlet of the second drain valve is connected with a hose; the outlet of the water inlet valve is provided with a wave-absorbing plate, the cross section of the wave-absorbing plate is L-shaped, a plurality of wave-absorbing holes are arranged on the vertical baffle and the horizontal baffle in a staggered mode at equal intervals, and the horizontal baffle is higher than the surface of saturated soil;
the water-gas separation device consists of a water-gas separation bottle, a second vacuum meter, a gas inlet and a gas outlet; the air inlet is communicated with the vent hole of the mounting top cover through an air pipe; the air outlet is communicated with a vacuum pump through an air pipe.
Further, the bottom cushion layer of the model box consists of a sandstone layer, a first iron wire net, a reverse filter geotechnical cloth layer and a second iron wire net from bottom to top.
Further, the cross section of the rubber ring is L-shaped or U-shaped.
Furthermore, the length of the air inlet pipe in the water-gas separation device extending into the water-gas separation bottle is longer than the length of the air outlet pipe in the water-gas separation bottle.
Further, when the barrel-shaped foundation reaches a preset elevation, all the micro pore water pressure sensors are positioned in the soil body.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model adopts the foundation guide device to ensure that the offshore barrel type foundation model keeps vertical in the injection process, and avoids the direct test error caused by the fact that the barrel type foundation can not ensure the level in the traditional test model and the test error caused by the further disturbance of the soil layer caused by the deviation rectification of the barrel type foundation;
2. the second drain valve at the top of the side wall of the model box can control the water level height, so that the liquid level is prevented from rising and no water overflows due to the entering of the model, the objective simulation of the stable and unchangeable sea level is realized, the real situation of the installation of the excavation-free offshore bucket foundation is fully simulated by a model test, and the excavation-free design calculation method and the related construction technology of the offshore bucket foundation are further perfected;
3. the water inlet valve of the utility model is provided with the reverse filter geotextile, which can reduce the water inlet pressure and the water surface fluctuation; the anti-filter geotextile is tightly attached to the inner wall of the mold box, and the water valve is adjusted to ensure that water flow slowly flows into the bottom of the mold box along the inner wall of the mold box, so that the scouring effect on the soil layer is reduced, and the water surface fluctuation is reduced;
4. the utility model fixes the wave-absorbing plate with L-shaped cross section at the water inlet on one side of the model box, and the bottom plate with holes can weaken the scouring effect of water flow on the soil layer in the water adding process of the test; the side wall of the wave-absorbing plate with the holes can absorb water waves generated in the water adding process of the water inlet valve, so that the water waves are prevented from interfering the test process and influencing the test result;
5. the utility model adopts the water-gas separation device, which can provide a stable negative pressure environment for the interior of the suction type barrel type foundation installation device, and can temporarily store a small part of water and sand sucked out from the interior of the suction type barrel type foundation installation device in the water-gas separation device, thereby avoiding the damage to the vacuum pump caused by directly sucking water into the vacuum pump; the vacuum gauge in the sealing valve of the water-gas separation device can accurately control the negative pressure in the suction type barrel-shaped foundation installation device;
6. the utility model discloses to install the supplementary installation device of top cap device conduct offshore bucket type basis, richened offshore bucket type basic installation method, for suction bucket type installation, utilize the installation top cap to make the section of thick bamboo wall number of the frictional force that the installation receives reduce half simultaneously, reduce the energy consumption, make among the perfect actual ocean engineering installation top cap device installation bucket type basis exempt from excavation computational formula and relevant construction technology.
Drawings
Fig. 1 is a schematic structural diagram of a guide-enhanced barrel-type foundation penetration test model device provided in an embodiment of the present invention;
fig. 2 is a top view of a guide-enhanced barrel-type foundation penetration test model device provided in an embodiment of the present invention;
FIG. 3 is a cross-sectional view of AA in FIG. 2;
fig. 4 is a top view of a basic guiding device according to an embodiment of the present invention;
in the figure: the device comprises a mounting top cover 1, a top cover main body 1-1, a level gauge 1-2, a U-shaped clamp 1-3, a rubber ring 1-4, a vent hole 1-5, a first inverse filtering geotextile 1-6, a first vacuum gauge 1-7, a foundation guide device 2, a rolling ball 2-1, a semicircular steel ring 2-2, a metal arm 2-3, a rolling wheel 2-4, a rolling track 2-5, a semicircular steel ring connecting device 2-6, a wave absorbing plate 3, a wave absorbing hole 3-1, a model box 4, a first drain valve 4-1, a second drain valve 4-2, a second inverse filtering geotextile 4-3, a third inverse filtering geotextile 4-4, a hose 4-5, saturated soil 4-6, airless water 4-7, a bottom cushion layer 4-8, a water supply device 5, a water inlet valve 5-1, 5-2 parts of fourth reverse filtering geotextile, 6-1 parts of barrel-shaped foundation, 6-1 parts of micro pore water pressure sensor, 7 parts of water-gas separation device, 7-1 parts of water-gas separation bottle, 7-2 parts of second vacuum gauge, 7-3 parts of gas inlet, 7-4 parts of gas outlet and 8 parts of vacuum pump.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 4, the guide-enhanced barrel-type foundation penetration test model device provided by the embodiment includes a test system, a water supply system and a negative pressure adjusting system; the testing system comprises a mounting top cover 1, a foundation guide device 2, a model box 4 and a barrel-shaped foundation 6; the water supply system comprises a water supply device 5, a water inlet valve 5-1 and a wave-absorbing plate 3; the negative pressure regulating system comprises a water-gas separating device 7 and a vacuum pump 8;
the mounting top cover 1 consists of a top cover main body 1-1 and a level meter 1-2; the top cover main body 1-1 is provided with a first vacuum meter 1-7 and a vent hole 1-5 which penetrate through the top cover main body, and a level 1-2 is fixed on the upper surface of the top cover main body; the first vacuum gauge 1-7 is used for monitoring the air pressure state in the barrel type foundation 6 in real time; an air extraction valve is arranged on the vent holes 1-5; the bottom of the vent hole 1-5 is provided with a first reverse filtering geotextile 1-6 to prevent slurry from entering the guide pipe and blocking the guide pipe; the level meter 1-2 is used for monitoring the level state of the top cover main body 1-1 in real time;
the barrel-shaped foundation 6 is a PVC barrel without a bottom and a cover; the barrel-shaped foundation 6 is hermetically connected with the top cover main body 1-1 through a rubber ring 1-4; the rubber ring 1-4 is further connected with the top cover main body 1-1 in a sealing way through a U-shaped clamp 1-3; at least one row of micro pore water pressure sensors 6-1 are fixed on the outer wall of the barrel-shaped foundation 6 along the vertical direction at a certain distance;
the base guiding device 2 comprises semicircular steel rings 2-2, metal arms 2-3, rollers 2-4 and rolling rails 2-5 which are symmetrically arranged, the rolling rails 2-5 are vertically and oppositely arranged on the front side wall and the rear side wall of the model box 4, the two semicircular steel rings 2-2 are detachably connected through semicircular steel ring connecting devices 2-6, a plurality of rolling balls 2-1 are arranged on the inner walls of the semicircular steel rings 2-2, and the barrel-shaped base 6 penetrates through the semicircular steel rings 2-2 and is in contact with the rolling balls 2-1 so as to reduce the friction force of the base guiding device 2 during the process that the barrel-shaped base 6 penetrates into the soil layer; one end of the metal arm 2-3 is connected with the semicircular steel ring 2-2, the other end of the metal arm is connected with the roller 2-4, and the roller 2-4 can roll and stop in the rolling track 2-5 so as to adjust the position of the basic guiding device 2 according to the test condition;
the model box 4 consists of five pieces of organic glass at the front, the back, the left and the right and at the bottom, the test condition in the model box 4 can be observed in real time, and the organic glass is hermetically connected with each other through an organic solvent (such as a chloroform solution); the top of the left side wall of the model box 4 is provided with a water inlet valve 5-1 which can supply water to the model box 4 from top to bottom to prepare saturated soil 4-6, the water inlet valve 5-1 is connected with a water supply device 5, and a fourth reverse filter geotextile 5-2 is arranged at a water outlet to reduce the impact pressure of water flow; a bottom cushion layer 4-8 and saturated soil 4-6 with a certain height are distributed in the model box 4 from bottom to top; 4-7 of airless water with a certain height is arranged above the 4-6 of the saturated soil; 4-6 parts of saturated soil for simulating a seabed; 4-7 times of the airless water simulates a seawater environment; a first drainage valve 4-1 is arranged at the bottom of the right side wall of the model box 4 and used for draining the airless water in the model box; the inner opening of the first drain valve 4-1 is provided with a second inverse filter geotextile 4-3, so that slurry in incompletely filtered water is prevented from entering the first drain valve 4-1 to cause blockage; a second drain valve 4-2 is arranged at the top of the right side wall of the model box 4 and used for preventing the liquid level from overflowing the model box 4 in the test process; the inner opening of the second drain valve 4-2 is provided with a third reverse filter geotextile 4-4 to prevent muddy water from entering the second drain valve 4-2 to cause blockage; the outlet of the second drain valve 4-2 is connected with a hose 4-5 for guiding overflowed water into a drainage pipeline; the water inlet valve 5-1 is provided with a wave eliminating plate 3 at the outlet, the wave eliminating plate 3 is L-shaped in overall section, a plurality of wave eliminating holes 3-1 are arranged on a vertical baffle and a horizontal baffle in a staggered mode at equal intervals, the horizontal baffle is higher than the surface of saturated soil 4-6, the vertical baffle is used for eliminating water waves, and the horizontal baffle is used for reducing the scouring effect of water flow on soil;
the water-gas separation device 7 consists of a water-gas separation bottle 7-1, a second vacuum meter 7-2, a gas inlet 7-3 and a gas outlet 7-4; the second vacuum meter 7-2 is used for monitoring the negative pressure state in the water-gas separation bottle 7-1 in real time; the air inlet 7-3 is communicated with the vent hole 1-5 of the mounting top cover 1 through an air pipe; the air outlet 7-4 is communicated with a vacuum pump 8 through an air pipe, and the vacuum pump 8 is used for controlling the negative pressure value in the water-gas separation bottle 7-1.
Specifically, the bottom cushion layer 4-8 of the model box 4 consists of a sandstone layer, a first wire mesh, a reverse filter geotechnical cloth layer and a second wire mesh from bottom to top; the volume of the saturated soil 4-6 and the non-aerated water 4-7 is determined according to the volume of the model box 4, the height of the barrel-shaped foundation 6 and the penetration depth; the saturated soil 4-6 is prepared by an underwater throwing filling method; the size of the mounting top cover 1 can be determined by the size of a barrel-shaped foundation prototype by using a similar principle; the rubber ring 1-4 for mounting the top cover 1 is made separately from the top cover main body 1-1, and in the test mounting process, vaseline needs to be coated on the rubber ring 1-4 to improve the sealing performance; the section of the rubber ring 1-4 can be in an L shape or a U shape; the number of the rolling balls 2-1 on the basic guiding device 2 can be reasonably adjusted according to the actual engineering situation.
Specifically, the wave-absorbing plate 3 is an organic glass plate, and the distance between the wave-absorbing plate 3 and the left side wall of the model box 4 is determined by the water inlet requirement, so that the adverse effect of severe fluctuation of the water level caused by water inlet in the model box 4 on the test is reduced; the height of the wave absorbing plate 3 is determined by the height of 4-6 of saturated soil required by the test.
Specifically, a water supply device 5 in the water supply system is used for supplementing airless water 4-7 into the model box 4; the fourth reverse filtering geotextile 5-2 at the water outlet of the water inlet valve 5-1 is used for reducing the water pressure of inlet water, and the fourth reverse filtering geotextile 5-2 is tightly attached to the side wall of the model box 4, so that the scouring effect on the saturated soil 4-6 at the bottom is reduced in the initial stage of water injection for the model box 4.
Specifically, the length of the air inlet pipe penetrating into the bottle in the water-gas separation device 7 in the negative pressure regulation system is longer than the length of the air outlet pipe penetrating into the bottle, and a second vacuum gauge 7-2 is installed at the top of the water-gas separation device 7 and used for monitoring the negative pressure value in the water-gas separation device 7; in the whole test process, the height of mud liquid in the water-gas separation bottle is lower than the height of the pipe orifice of the air outlet pipe in the bottle.
The utility model discloses the working process of device is as follows:
opening a water inlet valve 5-1, and slowly adding airless water with a certain height into the model box 4; then closing the water inlet valve 5-1 and opening the first drainage valve 4-1 to ensure that water slowly enters the top of the model box 4 and is slowly drained at the bottom, the water inlet speed and the water drainage speed are approximately equal, and uniformly and slowly adding sandy soil into the model box 4; and (4) closing the water inlet valve 5-1 and the first water discharge valve 4-1 after the sandy soil is fully absorbed with water in the non-aerated water 4-7 and deposited to form saturated soil 4-6.
The installation top cover 1 and the barrel-shaped foundation 6 are placed into the foundation guide device 2, and slowly sunk and inserted into the saturated soil 4-6 to a certain depth, so that a sealed space is formed inside the barrel-shaped foundation 6.
A sealed air pipe is adopted to connect and install the air vent 1-5 on the top cover 1 and the air inlet 7-3 of the water-gas separation device 7; and opening the vacuum pump 8 to ensure that the interior of the barrel-shaped foundation 6 and the water-gas separation device 7 are in a vacuum state, continuously applying negative pressure to ensure that the mounting top cover 1 and the barrel-shaped foundation 6 vertically, stably and uniformly penetrate into the soil body until the barrel-shaped foundation 6 sinks to the designed elevation, stopping air suction, closing an air suction valve and recording the corresponding pressure intensity.
And (3) acquiring and recording the readings of the micro pore water pressure sensor 6-1, the soil body surface displacement sensor and the vacuum meter in real time by using a data acquisition instrument in an initial test state and in a penetration process, and simultaneously monitoring the displacement on the barrel after stopping pumping till the acquired data gradually reaches a stable state. After data acquisition is finished, separating the air pipe on the air vent 1-5 from the water-gas separation device 7, enabling the barrel-shaped foundation to be directly communicated with the atmosphere until the air pressure inside and outside the barrel is equal, monitoring the surface displacement of the soil body in the model box 4 in real time in the process of negative pressure dissipation inside the barrel-shaped foundation, detecting the verticality of the barrel-shaped foundation 6 after the negative pressure dissipation of the barrel-shaped foundation is finished, and separating the mounting top cover 1 from the barrel-shaped foundation 6 after the detection is finished.
In order to ensure the accuracy of the test and avoid the contingency, the operation process is repeated to complete the penetration test of the simulation excavation-free offshore bucket foundation, and the negative pressure, the penetration speed, the frictional resistance between the bucket wall and the soil body and the rising height of the soil plug in the bucket foundation, the height of the extracted air and the height of the airless water required by the penetration of the bucket foundation are determined.
The foregoing description is considered as illustrative only of the principles of the invention and is not to be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (5)
1. A guide-enhanced barrel-shaped foundation penetration test model device is characterized by comprising a test system, a water supply system and a negative pressure adjusting system; the testing system comprises a mounting top cover (1), a foundation guide device (2), a model box (4) and a barrel-shaped foundation (6); the water supply system comprises a water supply device (5), a water inlet valve (5-1) and a wave-absorbing plate (3); the negative pressure adjusting system comprises a water-gas separating device (7) and a vacuum pump (8);
the mounting top cover (1) consists of a top cover main body (1-1) and a level meter (1-2); the top cover main body (1-1) is provided with a first vacuum meter (1-7) and a vent hole (1-5) which penetrate through the top cover main body, and a level meter (1-2) is fixed on the upper surface of the top cover main body; an air extraction valve is arranged on the vent hole (1-5); the bottom of the vent hole (1-5) is provided with a first reverse filtering geotextile (1-6);
the barrel-shaped foundation (6) is hermetically connected with the top cover main body (1-1) through a rubber ring (1-4); the rubber ring (1-4) is further connected with the top cover main body (1-1) in a sealing way through a U-shaped clamp (1-3); at least one row of micro pore water pressure sensors (6-1) are fixed on the outer wall of the barrel-shaped foundation (6) along the vertical direction;
the base guiding device (2) comprises semicircular steel rings (2-2), metal arms (2-3), rollers (2-4) and rolling rails (2-5) which are symmetrically arranged, the rolling rails (2-5) are vertically arranged on the front side wall and the rear side wall of the model box (4) in a right-to-front mode, the two semicircular steel rings (2-2) are detachably connected, a plurality of rolling balls (2-1) are arranged on the inner wall of each semicircular steel ring (2-2), and the barrel-shaped base (6) penetrates through the semicircular steel rings (2-2) and is in contact with the rolling balls (2-1); one end of the metal arm (2-3) is connected with the semicircular steel ring (2-2), the other end of the metal arm is connected with the roller (2-4), and the roller (2-4) can roll and stop in the rolling track (2-5);
the model box (4) consists of five organic glasses at the front, the back, the left and the right and at the bottom; a water inlet valve (5-1) is arranged at the top of the left side wall of the model box (4), the water inlet valve (5-1) is connected with a water supply device (5), and a fourth reverse filter geotextile (5-2) is arranged at a water outlet; a bottom cushion layer (4-8) and saturated soil (4-6) are distributed in the model box (4) from bottom to top, and air-free water (4-7) is injected; the saturated soil (4-6) is used for simulating a seabed; the water (4-7) is used for simulating a seawater environment; a first drain valve (4-1) is arranged at the bottom of the right side wall of the model box (4); a second reverse filter geotextile (4-3) is arranged at the inner opening of the first drainage valve (4-1); a second drain valve (4-2) is arranged at the top of the right side wall of the model box (4); the inner opening of the second drain valve (4-2) is provided with a third reverse filter geotextile (4-4), and the outlet is connected with a hose (4-5); the outlet of the water inlet valve (5-1) is provided with a wave-absorbing plate (3), the cross section of the wave-absorbing plate (3) is L-shaped, a plurality of wave-absorbing holes (3-1) are arranged on the vertical baffle and the horizontal baffle in a staggered mode at equal intervals, and the horizontal baffle is higher than the surface of saturated soil (4-6);
the water-gas separation device (7) consists of a water-gas separation bottle (7-1), a second vacuum meter (7-2), a gas inlet (7-3) and a gas outlet (7-4); the air inlet (7-3) is communicated with the vent hole (1-5) of the mounting top cover (1) through an air pipe; the air outlet (7-4) is communicated with a vacuum pump (8) through an air pipe.
2. The apparatus of claim 1, wherein the bottom mat (4-8) of the mold box (4) is composed of a sandstone layer, a first wire net, a reversed geotextile layer and a second wire net from bottom to top.
3. The guide-reinforced barrel-type foundation penetration test model device according to claim 1, wherein the cross-section of the rubber ring (1-4) is L-shaped or U-shaped.
4. The guide-enhanced barrel-type foundation penetration test model device as claimed in claim 1, wherein the length of the air inlet pipe penetrating into the water-gas separation bottle (7-1) in the water-gas separation device (7) is longer than the length of the air outlet pipe penetrating into the water-gas separation bottle (7-1).
5. The apparatus of claim 1, wherein all micro pore water pressure sensors (6-1) are located in the soil body when the barrel foundation (6) reaches a preset elevation.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439035A (en) * | 2021-12-09 | 2022-05-06 | 天津大学 | Recoverable top cover for offshore suction foundation and construction method |
| CN115876962A (en) * | 2023-02-06 | 2023-03-31 | 山东科技大学 | Ocean foundation test device for preparing sandy seabed based on fluidization and use method |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439035A (en) * | 2021-12-09 | 2022-05-06 | 天津大学 | Recoverable top cover for offshore suction foundation and construction method |
| CN114439035B (en) * | 2021-12-09 | 2024-05-28 | 天津大学 | Retractable top cover for offshore suction type foundation and construction method |
| CN115876962A (en) * | 2023-02-06 | 2023-03-31 | 山东科技大学 | Ocean foundation test device for preparing sandy seabed based on fluidization and use method |
| CN115876962B (en) * | 2023-02-06 | 2023-06-13 | 山东科技大学 | Marine foundation test device for preparing sandy seabed based on fluidization and use method |
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