CN115508215A - Pile soil testing device considering complex field state coupling effect - Google Patents
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- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 239000002689 soil Substances 0.000 title claims abstract description 34
- 230000001808 coupling effect Effects 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000012528 membrane Substances 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims description 78
- 238000003860 storage Methods 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000012466 permeate Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000009423 ventilation Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 230000000737 periodic effect Effects 0.000 abstract 1
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The invention discloses a pile soil testing device considering a complex field state coupling effect, which comprises a seepage generating system, a transparent model box, a temperature control system and a loading device. Filling a prepared soil sample into the transparent model box; the model pile is connected with a loading device and placed into a preset position in the model box; after the test starts, the temperature control system helps to create an in-situ temperature environment in the transparent model box; water in the seepage generation system is pumped into the model box through the pump machine, and the effect of inputting and outputting water into and out of the model box is achieved by utilizing the mutual matching of the inward permeable membrane slide block, the outward permeable membrane slide block and the pump machine, so that the in-situ seepage field environment is simulated; meanwhile, the loading device applies periodic lateral loads to the pile group model to form a multi-field coupling model test system with a temperature field, a seepage field and a stress field.
Description
Technical Field
The invention relates to a testing device, in particular to a pile soil testing device considering a complex field state coupling effect, and belongs to the technical field of geotechnical engineering tests.
Background
Along with the steady development of economy in China, on one hand, the construction of infrastructure is greatly developing in northwest and northeast of China. However, in these areas, there are many problems in infrastructure construction due to mountains, high altitude, low air temperature, and the like. The pile foundation engineering is used as an important ring, the importance of the pile foundation engineering is self-evident, due to the special properties and the structure of the cold region engineering, the pile foundation engineering is particularly sensitive to the change of the temperature, so the temperature environment is one of the main factors influencing the use of the cold region underground engineering, and meanwhile, the existence of water in rock-soil bodies changes the mechanical properties of the rock-soil bodies by the pore water pressure. When the environmental temperature is reduced to make the water in the rock-soil body reach the freezing temperature, the water is frozen, and the volume is increased, so that the frost heaving force is generated in the rock-soil body. Water (seepage field), heat (temperature field) and force (stress field) in rock-soil mass are mutually influenced, and a correct result is difficult to obtain by simply researching one of the fields.
On the other hand, cities with higher underground development degree in China are mostly in plain areas along rivers and coastal areas, have thicker fourth series cover layers and belong to typical porous media. Urban underground is generally controlled by underground coupling multi-fields, for example, the stability of underground space is closely related to the dynamic of a stress field and a seepage field, the dynamic change of underground water quantity is controlled by the seepage field and a chemical field, the influence of the tidal action in offshore areas on building structures is closely related to the change of a temperature field and a seepage field, and the like. It can be said that the factors affecting stability of the underground project are essentially macroscopic manifestations of the underground multi-field coupling.
In current practical engineering, offshore, river-entering and lake-entering engineering increasingly occupies the mainstream of research, especially for near-water large-diameter piles, and for the research of the near-water large-diameter piles, because the quantity of the piles is large, it is often difficult and the cost is high to perform full-scale tests of the piles in an in-situ field, so most researchers begin to turn to indoor reduced-scale test research. The influence of the lateral load in geotechnical engineering, particularly in the aspect of foundation, is increasing, for example, the influence of wind load, earthquake load and vehicle load on pile foundations of high-rise buildings or the influence of large lateral loads such as wind load and wave load on large pile foundation platforms at ports and on sea.
Disclosure of Invention
The invention aims to solve the problems and provide a test device which can not only manufacture the complicated field coupling action condition, but also research the deformation characteristic of the lateral load group pile under the condition.
The purpose of the invention can be achieved by adopting the following technical scheme:
a pile soil testing device considering a complex field state coupling effect comprises a seepage generating system, a transparent model box, a temperature control system and a loading device; the loading device is connected with the test pile and then placed into the transparent model box filled with the soil sample, the model pile is loaded in the test process, the temperature control system is connected with the transparent model box to control the temperature in the transparent model box in the test process, and the seepage generation device is connected with the transparent model box to periodically carry out water conveying and pumping operations.
Further, the seepage generating system comprises a water tank, a common water pipe, a special-shaped water pipe and a pump machine; and the small section end of the special-shaped water pipe is connected with the pump, and the large section end of the special-shaped water pipe is connected with the transparent model box.
Further, the transparent model box comprises a transparent cover plate, a ventilation area, a temperature control area and a one-way water permeable area; the transparent model box is made of organic glass, the inner wall of the transparent model box is square, the side length is 760mm, the height is 1660mm, and the wall thickness is 80mm; and heat insulation materials are coated above and below the transparent model box.
Furthermore, the temperature control system comprises an upper liquid pump, a liquid outlet pipe, an upper four-way valve, an upper temperature sensor, a temperature control box, a liquid outlet pipe, a lower four-way valve, a lower temperature sensor and a lower liquid pump; the upper temperature sensor is embedded in the upper four-way valve; the lower temperature sensor is embedded in the lower four-way valve; the temperature control box comprises a refrigeration area, a right liquid storage area, a middle liquid storage area, a heating area and a left liquid storage area; the right liquid storage area, the middle liquid storage area and the left liquid storage area are separated by a heat insulation plate; inert gas is filled between the heat insulation plate and the heat insulation plate; the refrigerating area comprises a temperature sensor, a semiconductor refrigerating system and a liquid outlet valve; the heating area comprises a temperature sensor, a heating guide sheet and a liquid outlet valve.
Further, the loading device comprises a loading bearing platform, a tray and weights; and after the test is started, weights are sequentially placed on the tray, and a horizontal load is applied to the pile body.
Furthermore, the one-way permeable area comprises an inward permeable membrane slide block, an outward permeable membrane slide block and a guide rail; the sliding block is arranged on the guide rail and can move alternatively through control; after the test is started, the water pump firstly conveys water into the transparent model box, and at the moment, the special-shaped water pipe is connected with the inward permeable membrane sliding block, so that water source is successfully introduced into the model box from the water pipe; treat the water pump when drawing water the operation, in one-way permeable area, the membrane slider that inwards permeates water moves along the guide rail forward, and the membrane slider that outwards permeates water moves downwards again after moving along the guide rail backward, reachs the position of former membrane slider that inwards permeates water, and the membrane slider that inwards permeates water rebound again this moment accomplishes and the position interchange of the membrane slider that outwards permeates water, successfully leads to the water pipe in following the mold box with the water source simultaneously.
Furthermore, four bolts are distributed on the transparent cover plate, when the sample soil and the model piles are placed in the transparent model box, the transparent cover plate is covered, the cover plate is locked by the bolts, and an environment similar to a closed environment is formed in the box body.
Furthermore, the periphery of the ventilation area is provided with small ventilation holes with the diameter of 2mm, so that the transparent box body is prevented from being damaged due to expansion and contraction of original gas in the box body caused by overlarge temperature change amplitude in the box body.
Furthermore, a temperature control pipe is embedded in the temperature control area, the section of the temperature control pipe is circular, the diameter of the temperature control pipe is 40mm, temperature control liquid flows in the temperature control pipe, the temperature control liquid exchanges heat with the environment in the model box when flowing through the model box, and the upper part and the lower part of the model box are coated with heat insulation materials, so that a preset temperature field can be built in the model box.
Furthermore, the upper temperature sensor is arranged in the upper four-way valve, when the temperature control liquid flows out of the transparent model box and passes through the upper four-way valve, the temperature of the temperature control liquid is automatically judged, when the temperature is higher than a preset temperature range, the temperature of the temperature control liquid enters a refrigerating area, and after the temperature reaches the preset temperature through refrigeration, the liquid outlet valve is opened and the temperature of the temperature control liquid enters a right liquid storage area; when the temperature is lower than the preset temperature interval, the liquid enters a heating area, and after the temperature is heated to reach the preset temperature, the liquid outlet valve is opened and the liquid enters a left liquid storage area; when the temperature is still in the preset temperature range, entering a medium liquid storage area; thereby realizing the recycling of the temperature control liquid.
The implementation of the invention has the following beneficial effects:
1. the content of the invention can help to carry out deep theoretical research on the lateral loaded pile under the coupling action of complex field states such as a stress field, a seepage field, a temperature field and the like, and is favorable for showing the influence of the complex field states on the soil body around the pile and the interaction mechanism of the lateral loaded pile and the soil body around the pile under the complex field states. The method provides scientific basis and test means for the construction of the pile foundation engineering under the action condition of the complex field state, and has important practical significance.
2. According to the unidirectional water permeable area in the transparent model box, the two unidirectional water permeable film sliding blocks are mutually moved and matched, so that the periodical changes of tide rising and tide falling in a near water area can be simulated. The existence of the special-shaped water pipe can be based on the flow formula (under the condition of certain flow, the larger the cross section area of the pipeline is, the slower the liquid flow velocity is), thereby reducing the flow velocity of water entering and leaving the model box from the pump machine, increasing the initial seepage area of the water flow and being more practical.
3. The temperature control system and the temperature control box can achieve the effect of keeping the temperature of the temperature control liquid constant, so that the automatic circulation of the temperature control system is realized, and the effect that the temperature field in the model box can be controlled to slightly move up and down in the test process is ensured.
4. According to the invention, the temperature control system is matched with the model box, a two-dimensional temperature field is built in the model box, and compared with the one-dimensional temperature field built in most of the existing tests, the two-dimensional temperature field can more efficiently reach the preset test temperature.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a pile soil testing device considering a complex field coupling effect
FIG. 2 is an exploded view of a transparent mold box
FIG. 3 is a southwest view of the structure of the temperature control system
FIG. 4 is a northeast view of the temperature control system structure
FIG. 5 is a sectional view of the inner structure of the temperature control box
FIG. 6 is a schematic view of a process of a water-permeable one-way zone
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1 to 6, the present embodiment relates to a pile soil testing apparatus considering a complex field coupling effect, which includes a transparent model box 1, a temperature control system 2, a seepage flow generating system 3, and a loading device 4; the loading device 4 is connected with the test pile 44 and then placed in the transparent model box 1 filled with the soil sample, the model pile 44 is loaded in the test process, the temperature control system 2 is connected with the transparent model box 1 to control the temperature in the transparent model box 1 in the test process, and the seepage generation device 3 is connected with the transparent model box 1 to periodically perform water conveying and pumping operations.
The transparent model box 1 comprises a transparent cover plate 11, a ventilation area 12, a temperature control area 13 and a one-way water permeable area 14; the transparent model box 1 is made of organic glass, the inner wall is square, the side length is 760mm, the height is 1660mm, and the wall thickness is 80mm; and heat insulation materials are coated above and below the transparent model box.
The temperature control system 2 comprises a liquid outlet pipe 22 of a temperature control box 21, an upper four-way valve 24 of an upper temperature sensor 23, a liquid conveying pipe 25, a lower temperature sensor 26, a lower four-way valve 27, a lower liquid pump 28 and an upper liquid pump 29; the upper temperature sensor 23 is embedded in the upper four-way valve 24; the lower temperature sensor 26 is embedded in the lower four-way valve 27; the temperature control box 21 comprises a refrigerating area 211, a right liquid storage area 212, a middle liquid storage area 213, a heating area 214 and a left liquid storage area 215; the right liquid storage area 211, the middle liquid storage area 213 and the left liquid storage area 214 are separated by a heat insulation plate area; inert gas is filled between the heat insulation plate and the heat insulation plate; the refrigerating area 211 comprises a temperature sensor, a semiconductor refrigerating system 2111 and a liquid outlet valve; the heating area comprises a temperature sensor, a heating guide sheet 2141 and a liquid outlet valve.
The seepage generating system 3 comprises a water tank 31, a common water pipe 32, a pump 33 and a special-shaped water pipe 34; the small section end of the special-shaped water pipe 34 is connected with the pump 33, and the large section end of the special-shaped water pipe is connected with the transparent model box 1.
The loading device 4 comprises a loading bearing platform 41, a tray 42 and weights 43; the loading bearing platform 41 is buckled into the transparent model box 1 side, and the loading rope bypasses the loading bearing platform 41 and is connected with the tray 42 after being connected with the model pile 44.
Four bolts 111 are distributed on the transparent cover plate 11, when the placement of the sample soil and the model pile 44 in the transparent model box 1 is finished, the transparent cover plate 11 is covered, and the cover plate is locked by the bolts 111, so that an approximately closed environment is formed in the box body.
The periphery of the ventilation area 12 is provided with small ventilation holes with the diameter of 2mm, so that the phenomenon that the transparent box body is damaged due to expansion and contraction of original gas in the box body because the temperature change range in the box body is too large is prevented.
The temperature control area 13 is embedded with a temperature control pipe 131, the section of the temperature control pipe 131 is circular, the diameter of the temperature control pipe 131 is 40mm, temperature control liquid flows in the temperature control pipe 131, the temperature control liquid exchanges heat with the environment in the model box when flowing through the model box, and a preset temperature field can be created in the model box because the upper part and the lower part of the model box are coated with heat insulation materials.
The one-way water permeable region 14 comprises an inward water permeable membrane slide block 141, an outward water permeable membrane slide block 142 and a guide rail 143; the slider is placed on the guide rails 143 and can be controlled to move alternately.
The specific use method is as follows:
firstly, preparing inviscid soil according to test requirements, placing a transparent model box 1, a temperature control system 2 and a seepage generation system 3 on a leveling field, and filling a prepared soil sample into the transparent model box 1.
Secondly, injecting a proper amount of water into the water tank 31, properly installing the loading device 4, connecting the loading device with the model pile 44, connecting the strain gauge of the model pile 44 with a strain acquisition instrument through a lead, and placing the model pile into a model box filled with soil samples.
And thirdly, covering the transparent cover plate 11 on the mold box and locking the transparent cover plate by using a bolt 111.
Fourthly, a lower liquid pump 28 and an upper liquid pump 29 in the temperature control system 2 are turned on, when the temperature control liquid flows out of the transparent model box 1 and passes through an upper four-way valve 24, the temperature of the temperature control liquid is automatically judged, when the temperature is higher than a preset temperature range, the temperature enters a refrigerating area 211, and after the temperature reaches the preset temperature through refrigeration, a liquid outlet valve is turned on and the temperature enters a right liquid storage area 212; when the temperature is lower than the preset temperature range, the liquid enters the heating zone 214, and after the temperature reaches the preset temperature through heating, the liquid outlet valve is opened and the liquid enters the left liquid storage zone 215; when the temperature is still in the preset temperature range, entering a middle liquid storage area 213; the temperature control liquid can be recycled, and a required temperature field is manufactured in the model box.
Fifthly, after the temperature in the model box reaches the test temperature, a pump 33 of the seepage generating system 3 is started to deliver water into the model box, and at the moment, the special-shaped water pipe 34 is connected with the inward permeable membrane slide block 141, so that water source is successfully introduced into the model box from the water pipe; after the water delivery amount reaches the preset seepage total amount, the pump 33 pumps water, at this time, in the one-way permeable area 14, the inward permeable membrane slide block 141 moves forward along the guide rail, the outward permeable membrane slide block 142 moves backward along the guide rail and then moves downward to reach the position of the original inward permeable membrane slide block 141, at this time, the inward permeable membrane slide block 141 moves upward again to complete the position exchange with the outward permeable membrane slide block 142, the special-shaped water pipe 34 is connected with the outward permeable membrane slide block 141, and at the same time, the water source is successfully guided into the water tank 31 from the inside of the model box.
Sixthly, after the environment of the temperature field and the seepage field in the model box is stable, weights 43 are quantitatively applied to the tray 42 of the loading device 4, horizontal loads are applied to the model pile 44, and the strain data of the pile body at the moment are collected by the strain collector.
Claims (10)
1. A pile soil test device considering a complex field coupling effect is characterized by comprising a seepage flow generating system, a transparent model box, a temperature control system and a loading device; the loading device is connected with the test pile and then placed into the transparent model box filled with the soil sample, the model pile is loaded in the test process, the temperature control system is connected with the transparent model box to control the temperature in the transparent model box in the test process, and the seepage generation device is connected with the transparent model box to periodically carry out water conveying and pumping operations.
2. The pile soil testing device considering the coupling effect of the complex field states as claimed in claim 1, wherein the seepage generating system comprises a water tank, a common water pipe, a special-shaped water pipe and a pump machine; the small section end of the special-shaped water pipe is connected with the pump, and the large section end of the special-shaped water pipe is connected with the transparent model box.
3. The pile soil testing device considering the coupling effect of the complex field states as claimed in claim 1, wherein the transparent model box comprises a transparent cover plate, a ventilation area, a temperature control area and a one-way water permeable area; the transparent model box is made of organic glass, the inner wall of the transparent model box is square, the side length is 760mm, the height is 1660mm, and the wall thickness is 80mm; and heat insulation materials are coated above and below the transparent model box.
4. The pile soil testing device considering the coupling effect of the complex field state as claimed in claim 1, wherein the temperature control system comprises an upper liquid pump, a liquid outlet pipe, an upper four-way valve, an upper temperature sensor, a temperature control box, a liquid outlet pipe, a lower four-way valve, a lower temperature sensor and a lower liquid pump; the upper temperature sensor is embedded in the upper four-way valve; the lower temperature sensor is embedded in the lower four-way valve; the temperature control box comprises a refrigeration area, a right liquid storage area, a middle liquid storage area, a heating area and a left liquid storage area; the right liquid storage area, the middle liquid storage area and the left liquid storage area are separated by a heat insulation plate; filling inert gas between the heat insulation plates; the refrigerating area comprises a temperature sensor, a semiconductor refrigerating system and a liquid outlet valve; the heating area comprises a temperature sensor, a heating guide vane and a liquid outlet valve.
5. The pile soil testing device considering the coupling effect of the complex field states as claimed in claim 1, wherein the loading device comprises a loading bearing platform, a tray and a weight; the loading bearing platform is buckled into the side of the transparent model box, the loading rope is connected with the model pile and then bypasses the loading bearing platform to be connected with the tray, and after the test is started, weights are sequentially placed on the tray to apply horizontal load to the pile body.
6. The pile soil testing device considering the coupling effect of the complex field state as claimed in claim 2 or claim 3, wherein the one-way permeable area comprises an inward permeable membrane slide block, an outward permeable membrane slide block, a guide rail; the sliding block is arranged on the guide rail and can move alternatively through control; after the test is started, the water pump firstly conveys water into the transparent model box, and at the moment, the special-shaped water pipe is connected with the inward permeable membrane sliding block, so that water source is successfully introduced into the model box from the water pipe; when treating the water pump and drawing water the operation, in one-way permeable zone, the membrane slider that inwards permeates water moves along the guide rail forward, outwards permeates water and downwards moves again after the membrane slider that outwards permeates water moves along the guide rail backward, reachs the position of former membrane slider that inwards permeates water, upwards moves again to inwards permeate water this moment, accomplishes and outwards permeates water and permeate water the position interchange of membrane slider, successfully leads to the water pipe in following the mold box with the water source simultaneously.
7. The pile soil testing device considering the coupling effect of the complex field states as claimed in claim 3, wherein four bolts are distributed on the transparent cover plate, when the sample soil and the model piles are placed in the transparent model box, the transparent cover plate is covered and the cover plate is locked by the bolts, so that an approximately closed environment is formed in the box body.
8. The pile soil testing device considering the coupling effect of the complex field state as claimed in claim 3, wherein the periphery of the ventilation area is provided with small ventilation holes with the diameter of 2mm, so as to prevent the transparent box body from being damaged due to expansion and contraction of original gas in the box body caused by overlarge temperature change range in the box body.
9. The pile soil test device considering the coupling effect of the complex field states as claimed in claim 3, wherein the temperature control area is embedded with a temperature control pipe, the cross section of the temperature control pipe is circular, the diameter of the temperature control pipe is 40mm, temperature control liquid flows in the temperature control pipe, the temperature control liquid exchanges heat with the environment in the model box when passing through the model box, and the preset temperature field can be created in the model box because the upper part and the lower part of the model box are coated with heat insulation materials.
10. The pile soil testing device considering the coupling effect of the complex field state as claimed in claim 4, wherein the upper temperature sensor is built in the upper four-way valve, when the temperature control liquid flows out of the transparent model box and passes through the upper four-way valve, the temperature of the temperature control liquid is automatically judged, when the temperature is higher than a preset temperature range, the temperature enters the refrigeration area, and after the temperature is cooled to reach the preset temperature, the liquid outlet valve is opened and the temperature enters the right liquid storage area; when the temperature is lower than the preset temperature interval, the liquid enters a heating area, and after the temperature is heated to reach the preset temperature, the liquid outlet valve is opened and the liquid enters a left liquid storage area; when the temperature is still in the preset temperature range, entering a medium liquid storage area; thereby realizing the recycling of the temperature control liquid.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116773780A (en) * | 2023-08-16 | 2023-09-19 | 中国科学院、水利部成都山地灾害与环境研究所 | Vegetation slope soil seepage erosion experiment measurement system and measurement method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116773780A (en) * | 2023-08-16 | 2023-09-19 | 中国科学院、水利部成都山地灾害与环境研究所 | Vegetation slope soil seepage erosion experiment measurement system and measurement method |
| CN116773780B (en) * | 2023-08-16 | 2023-12-08 | 中国科学院、水利部成都山地灾害与环境研究所 | Vegetation slope soil seepage erosion experiment measurement system and measurement method |
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