CN211200492U - Near-sea foundation pit supporting structure model test device - Google Patents
Near-sea foundation pit supporting structure model test device Download PDFInfo
- Publication number
- CN211200492U CN211200492U CN201921597416.0U CN201921597416U CN211200492U CN 211200492 U CN211200492 U CN 211200492U CN 201921597416 U CN201921597416 U CN 201921597416U CN 211200492 U CN211200492 U CN 211200492U
- Authority
- CN
- China
- Prior art keywords
- water
- pressure
- supporting structure
- foundation pit
- organic glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a temporary sea foundation pit supporting structure model test device, which comprises a dynamic water injection device, a model box, a water-soil separation device and a monitoring device; the moving water injection device is used for injecting water like a model box, and the water is changed in a sine or cosine curve regularity along with time so as to simulate sea wave and tide changes; the model box is used for simulating foundation pit supporting structures at different distances from the sea, and soil samples are filled in the model box; the water-soil separation device is used for simulating the condition that the supporting structure of the foundation pit is damaged and the soil infiltration and water seepage are caused, and measuring the soil output and the water output; the monitoring device records the water pressure of water flow passing through a certain position in the model box in real time; the monitoring device records the pressure and the strain magnitude in the horizontal and vertical directions of the foundation pit supporting structure at different positions in real time.
Description
Technical Field
The experiment relates to an experimental device of a coastal foundation pit supporting structure model, which is used for measuring the change of pore water pressure in soil caused by water pressure change when tide water rises and falls and the influence on the coastal foundation pit supporting structure.
Background
With the rapid development of economy, coastal building engineering is actively built, and development and construction of a large number of coastal foundation pits follow. In the prior art, the fluctuation of tidal water has great influence on the construction of the foundation pit, and the instability and the damage of the foundation pit supporting structure have important relationship with the fluctuation. Through further research, under the action of tidal water circulation fluctuation, the pore water pressure in the soil around the coastal foundation pit continuously changes, so that the pressure is generated on the foundation pit supporting structure, the deformation is caused, and the safe use of the coastal foundation building is influenced. The experimental device is particularly important for researching the stress and deformation of the tidal water fluctuation on the foundation pit supporting structure.
At present, most of researches on foundation pits only aim at the conventional foundation pits, such as the permeation condition of surface water to the foundation pit enclosure wall, the displacement of a foundation pit supporting structure, the deformation of a soil body and the like. The fluctuation of the tidal water can be ignored for the deformation of the conventional foundation pit, so that the previous research on the conventional foundation pit does not relate to the influence of the tidal water, and the construction design reference of the conventional foundation pit is not large for the coastal foundation pit. In addition, the engineering with reference value is a seawall engineering, and the seawall is used as a wave-proof building, and the fluctuation of tidal water must be considered during construction design. For such projects, many researches have been made before, however, for general foundation pit support, the support structure is only a temporary measure, the seawall project is a permanent project, if the construction is carried out according to the standard of the seawall project, the resource waste phenomenon is caused, and the construction requirements cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at explores the influence that the tidal water fluctuation changes to supporting construction, provides and to be close to sea underground structure model test device, and the device can simulate and face the influence that the underground structure of sea different distances receives the tidal water fluctuation change.
In order to solve the technical problem, the utility model provides a temporary sea foundation pit supporting structure model test device, which comprises a dynamic water injection device, a model box, a water-soil separation device and a monitoring device;
The moving water injection device is used for injecting water like a model box, and the water is changed in a sine or cosine curve regularity along with time so as to simulate sea wave and tide changes;
The model box is used for simulating foundation pit supporting structures at different distances from the sea, and soil samples are filled in the model box;
The water-soil separation device is used for simulating the condition that the supporting structure of the foundation pit is damaged and the soil infiltration and water seepage are caused, and measuring the soil output and the water output;
The monitoring device records the water pressure of water flow passing through a certain position in the model box in real time; the monitoring device records the pressure and the strain magnitude in the horizontal and vertical directions of the foundation pit supporting structure at different positions in real time.
In a preferred embodiment: the dynamic water injection device comprises an air compressor, an adjusting valve, a gas-liquid pump, a plunger system, a water tank and a fluctuation acquisition sensor;
The air compressor is connected with the regulating valve through a flange, the regulating valve is connected with the gas-liquid booster pump through a pressure-resistant pipe, the gas-liquid booster pump is connected with the plunger system through a pressure-resistant pipe, and the gas-liquid booster pump is connected with the water tank through a guide pipe;
When the gas-liquid booster pump works, the piston runs backwards to suck water in the water tank into the gas-liquid pump, the one-way valve at the inlet of the gas-liquid pump is opened, and air enters the gas-liquid pump through the pressure-resistant pipe; when the piston moves forwards, a certain pressure is formed on one side of the liquid, the one-way valve at the outlet of the gas-liquid pump is opened, high-pressure water flows out from the outlet, the high-pressure water is injected into the plunger system through the pressure-resistant pipe, the plunger system utilizes the action of the piston to enable the pressure of the high-pressure water to change in a sine or cosine curve mode regularly along with time, therefore, the dynamically fluctuating water pressure is obtained, and then the water is injected into the model box through the pressure-resistant pipe.
In a preferred embodiment: the model box comprises a model groove, a permeable plate and a supporting structure;
The mold groove comprises an aluminum top cover, an aluminum bottom plate, an aluminum side wall and an organic glass side wall; the aluminum side wall is placed at the back, the organic glass side wall is placed at the front, the tops of the aluminum side wall and the organic glass side wall are respectively connected and fixed with the aluminum top cover through flanges, and the bottom of the aluminum side wall and the organic glass side wall is connected and fixed with the aluminum bottom plate through flanges;
The aluminum material top cover, the aluminum material bottom plate and the inner side axisymmetric positions of the aluminum material side walls are respectively provided with a slide rail, and the aluminum material top cover and the aluminum material bottom plate are provided with a plurality of bolt holes along the slide rails; the supporting structure is fixed at the tail end of the model groove through bolts and used for simulating Larsen steel sheet piles in foundation pit engineering; 6 bolt holes which are bilaterally symmetrical are formed in a web plate of the supporting structure and used for simulating leakage holes generated by the damage of the supporting structure; the porous disk links to each other with moving water injection device through withstand voltage pipe, arranges the mould inslot in, and three recesses are dug respectively at three sides of laminating top cap, bottom plate, aluminium material lateral wall to the porous disk, agrees with the slide rail in mould groove, makes the porous disk move in the direction that the mould inslot is close to supporting construction or keeps away from supporting construction to adjust its in the mould inslot position in order to simulate the excavation supporting construction of facing the sea different distances.
In a preferred embodiment: the water-soil separation device comprises a pressure-resistant pipe, a pipeline, a mixture separation device, a liquid storage tank, two electronic scales and a filter screen;
One end of the pressure-resistant pipe is connected with a bolt hole on the supporting structure, the other end of the pressure-resistant pipe is connected with the mixture separation device, one end of the pipeline is connected with the mixture separation device, the other end of the pipeline is guided to the liquid storage tank, and the mixture separation device and the liquid storage tank are respectively placed on the two electronic scales to read data in real time;
The mixture separation device consists of an upper organic glass cylinder and a lower organic glass cylinder, and a silica gel plate is arranged between the upper organic glass cylinder and the lower organic glass cylinder for sealing; the upper and lower organic glass cylinders are provided with flanges and fixed through bolts, and a filter screen is arranged between the upper and lower organic glass cylinders to prevent solid particles at the lower part from passing through so as to realize solid-liquid separation;
The liquid flows into a liquid storage tank through a pipeline, and the liquid storage tank is composed of four pieces of organic glass and is a square organic glass groove with an upper opening.
In a preferred embodiment: the monitoring device comprises a micro void water pressure gauge, a resistance strain gauge, a data acquisition device and a computer terminal;
The micro pore water pressure gauge is arranged on the organic glass side plate of the mold groove, is connected to a computer terminal through a data acquisition and transmission module and can monitor and record the pressure of water flowing through a specific distance in real time;
The supporting structure is evenly provided with a plurality of micro pore water pressure gauges and a plurality of resistance strain gauges in the horizontal and vertical directions, the micro pore water pressure gauges and the resistance strain gauges are connected to a computer terminal through a data acquisition device, and the stress of the supporting structure in different positions and the strain magnitude in the horizontal and vertical directions can be monitored and recorded in real time.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
1. The utility model provides a face sea underground structure model test device adopts and moves water injection device, makes highly-compressed air become high-pressure liquid under the effect of gas-liquid charge pump, and accessible plunger system makes fixed water under high pressure become undulant water pressure simultaneously, and the undulant collection sensor of this piston system accessible sets for dynamic fluctuation pressure and gathers pressure in real time, generates the fluctuation curve, can simulate the water pressure value of the change of tide water fluctuation.
2. The utility model provides a face sea underground structure model test device sets up in mobilizable porous disk of mould inslot, carries out the multiunit experiment through the porous disk of placing different positions, can simulate the same tidal water change down and face the water pressure and the deformation that the excavation supporting receives of sea different distances.
3. The utility model provides a face sea underground structure model test device sets up and covers a plurality of miniature pore water pressure gauges in the organic glass of mold box, but the same tidal water of real-time recording changes the change of different distance pressures in the soil down.
4. The utility model provides a face sea underground structure model test device, to the condition that supporting construction carries out trompil simulation supporting construction destruction and infiltration soil to adopt soil and water separator, realize the soil and water separation, go out soil volume and water yield through the registration of electronic scale.
5. The utility model provides a face sea underground structure model test device carries out the trompil to supporting construction, places miniature hole water pressure gauge and foil gage on supporting construction, records supporting construction upper pressure and the size of meeting an emergency, and atress and deformation after the damage are strutted in the simulation.
6. The utility model provides a face sea underground structure model test device passes through data acquisition and transmission module with miniature pore water pressure gauge and foil gage and connects in computer terminal, but pressure value in the real-time recording soil and change, the pressure that supporting construction receives and deformation. By data acquisition, a pressure change curve, a pressure distribution diagram and a strain distribution diagram of the supporting structure can be made.
Drawings
FIG. 1 is a view of the entire apparatus;
FIG. 2 is a diagram of a power water injection device;
Figure 3 is a sectioned face of the support structure;
Figure 4 is a cross section of a support structure web;
FIG. 5 is a cross section of the mold groove and the permeable plate;
FIG. 6 is a water-soil separating device;
FIG. 7 is a view of the arrangement of a micro pore water pressure gauge on the back of the model case assembly;
In the figure: 1-air compressor 2-regulating valve 3-gas-liquid booster pump 4-plunger system 5-water tank 6-fluctuation collection sensor 7-model groove 8-supporting structure 9-water permeable plate 10-slide rail 11-web 12-flange 13-pipeline 14-mixture separation device 15-liquid storage tank 16-electronic scale 17-electronic scale 18-filter screen 19-micro pore water pressure gauge 20-resistance strain gauge 21-data collection device 22-computer terminal 23-flange 24-pressure resistance pipe 25-guide pipe.
Detailed Description
The invention is further described below by means of specific embodiments
Referring to fig. 1, the test device for the near-sea foundation pit supporting structure model comprises a flowing water injection device, a model box, a water-soil separation device and a monitoring device.
The flowing water injection device comprises an air compressor 1, an adjusting valve 2, a gas-liquid booster pump 3, a plunger system 4, a water tank 5 and a fluctuation acquisition sensor 6. The device can make the water pressure applied to the soil sample automatically change in a sine or cosine curve regularity along with time so as to simulate the change of the water pressure caused by the fluctuation effect of tidal water circulation.
Referring to fig. 2, an air compressor 1 and a regulating valve 2 are connected through a flange 23, the regulating valve 2 and a gas-liquid booster pump 3 are connected through a pressure-resistant pipe 24, the gas-liquid booster pump 3 and a plunger system are connected through the pressure-resistant pipe 24, and the gas-liquid booster pump 3 and a water tank 5 are connected through a conduit 25.
The air compressor 1 adopts a centrifugal compressor, the air pressure is 0.1-5mpa, the power is 300-450kw, and the air compressor is used for applying work to the air to increase the pressure and the speed of the air, so that high-pressure air is obtained. The regulating valve 2 adopts an electronic single-seat electric regulating valve, the pressure is 0.1-5mpa, and the electronic single-seat electric regulating valve is used for regulating the pressure value of air conveyed by the air compressor 1. The gas-liquid booster pump 3 adopts a single-driving-head single-action pump, the boosting ratio is 6:1, and the output pressure is 0-5 mpa. The gas-liquid booster pump 3 is a reciprocating plunger pump using gas as a power source, and converts low-pressure driving surface of a large-area piston end into high-pressure liquid of a small-area piston end. When the gas-liquid booster pump 3 works, the piston moves backwards, water in the water tank 5 is sucked into the pump, the one-way valve at the inlet is opened at the moment, air enters the pump through the pressure-resistant pipe 24, when the piston moves forwards, a certain pressure is formed at one side of liquid, the one-way valve at the outlet is opened, high-pressure water flows out from the outlet, then the high-pressure water is injected into the plunger system 4 through the pressure-resistant pipe 24, the pressure of the high-pressure water is changed regularly along a sine or cosine curve with time by the plunger system 4 under the action of the piston, so that dynamically fluctuating water pressure is obtained, and the water is injected into the. The piston system can set dynamic fluctuation pressure through the fluctuation acquisition sensor 6 and acquire the pressure in real time to generate a fluctuation curve, so that later-stage data analysis is facilitated.
The model box comprises a model groove 7 (with the length of 3m, the width of 1m and the height of 1m), a supporting structure 8 and a permeable plate 9.
The mold groove 7 comprises a 1cm thick aluminum top cover, a 1cm thick aluminum bottom plate, a 1cm thick aluminum side wall and a 1cm thick organic glass side wall. The aluminium material lateral wall is put in the back, and the organic glass lateral wall is put in the front to in observing, the lateral wall top passes through flange joint with aluminum plate and fixes, and the lateral wall bottom passes through flange joint with aluminum plate and fixes, wholly constitutes length 3m, wide 1m, height 1m, wall thickness 3 cm's model groove. Set up a length 3m, width 1cm, high 1 cm's slide rail 10 respectively at the inboard axisymmetric position of aluminium material top cap, aluminium material bottom plate and aluminium material lateral wall to set up the bolt hole that the height is 2cm, the diameter is 1cm by outer to interior along slide rail every 3cm length on top cap and bottom plate.
Referring to fig. 3, the supporting structure 8 is formed by interlocking two U-shaped aluminum plates, is fixed at the tail end of a model groove through bolts, and is used for simulating a larsen steel sheet pile in foundation pit engineering. The U-shaped aluminum plate consists of a web plate 11 and a flange 12, the overall effective width is 0.5m, the width of the web plate 11 is 0.3m, the effective height is 0.2m, and the thickness is 2.43 cm. Referring to fig. 4, the web plate 11 is provided with 6 left-right symmetrical bolt holes with the diameter of 4cm and the thickness of 1cm, the circle centers of the two bolt holes are horizontally separated by 15cm and vertically separated by 25cm, and the bolt holes are used for simulating leakage holes generated by the damage of a supporting structure. Referring to fig. 5, the porous disk 9 is 1m long, 1m wide and 1cm thick, the porous disk 9 is connected with the flowing water injection device through the pressure-resistant pipe 24 and is arranged in the model groove, the porous disk 9 is respectively dug into a groove with a length of 1cm, a width of 1cm and a thickness of 3cm on three sides of the attached top cover, the attached bottom plate and the aluminum side wall, and the groove is matched with the slide rail 10 of the model groove 7, so that the porous disk 9 can be close to the supporting structure 8 or far away from the supporting structure 8 in the model groove 7 to move, and the position of the porous disk in the model groove can be adjusted to simulate the foundation pit supporting structure facing different sea distances.
Referring to fig. 6, the water-soil separation device includes a pressure pipe 24, a pipe 13, a mixture separation device 14, a liquid storage tank 15, an electronic scale 16, an electronic scale 17, and a filter screen 18. One end of a pressure-resistant pipe 24 is connected with a bolt hole on the supporting structure 8, the other end of the pressure-resistant pipe is connected with the mixture separation device 14, one end of a pipeline 13 is connected with the mixture separation device 14, the other end of the pipeline is guided to the liquid storage tank 15, the mixture separation device 14 and the liquid storage tank 15 are respectively placed on the electronic scales 16 and 17, and data can be read in real time. The water-soil separation device is used for simulating the condition that the supporting structure is damaged and the soil is infiltrated and the water seepage is carried out, and measuring the soil output and the water output. The mixture separation device 14 is composed of an upper organic glass cylinder and a lower organic glass cylinder which are 1m high and 1m in diameter, the upper portion and the lower portion of each organic glass cylinder are opened, an O-shaped silica gel plate is placed for sealing in the period, the upper cylinder and the lower cylinder are provided with flanges and fixed through bolts, a filter screen 18 which is 1cm thick and 1m in diameter is placed between the upper cylinder and the lower cylinder, solid particles on the lower portion can be prevented from passing through the filter screen, and solid-. The liquid flows into a liquid storage tank 15 through a pipeline 13, and the liquid storage tank 15 is composed of four organic glass blocks with the length of 1m, the width of 1m and the thickness of 3cm and is a cubic organic glass groove with an upper opening and a lower opening.
The soil output and water output were calculated as follows: density p of known soil s(g/cm3) And density of water ρ w(g/cm3) By experiment the electronic scale 16 is at t 1The parameter shown at the moment is denoted as M 1', at t 2Time scale 16 is denoted as M 1"; electronic scale 17 at t 1The parameter shown at the moment is denoted as M 2', at t 2Time scale 17 is denoted as M 2". The expression of the soil output m in the time period can be obtained: 
The expression of the water yield Q in this time period: 
The monitoring device comprises a micro pore water pressure gauge 19, a resistance strain gauge 20, a data acquisition device 21 and a computer terminal 22. The micro pore water pressure gauge 19 can measure the pore water pressure in the soil, the measuring range is 0.01-3mpa, and the diameter is 13 mm. The resistance strain gauge 20 measures strain by measuring a change in resistance. The monitoring device can record pressure change and strain magnitude in real time. Referring to fig. 7, a micro pore water pressure gauge 19 is arranged on an organic glass cover every 20cm from left to right and every 10m from top to bottom, the micro pore water pressure gauge 19 is connected to a computer terminal 22 through a data acquisition device 21, and the pore water pressure when water flows through a specific distance can be monitored and recorded in real time. Referring to FIG. 4, a micro-gap water pressure gauge 19 is arranged above the position 12.5cm away from the center of the bolt hole on the web plate 11; a resistance strain gauge 20 in the horizontal direction and the vertical direction is arranged below each micro pore water pressure gauge, the micro pore water pressure gauges 19 and the resistance strain gauges 20 are connected to a computer terminal 22 through a data acquisition device 21, and the water pressure and the strain magnitude in the horizontal direction and the vertical direction of the supporting structure at different positions can be monitored and recorded in real time.
The specific operation process of the test is as follows:
(1) Will move water injection device and be connected with porous disk 9 through withstand voltage pipe 24, place in mould type groove 7, supporting construction 8 is fixed at mould type groove 7 end, remove porous disk 9 to from supporting construction 8 specific position, record porous disk 9 to supporting construction 8's distance, insert the bolt hole of the top cap of porous disk 9 both sides and bottom plate respectively with four bolts, make porous disk 9 both sides fastening, the hole between reuse all the other bolts with porous disk 9 and supporting construction 8 is plugged up.
(2) The micro pore water pressure gauge 19 is fixed on the organic glass cover of the model groove 7 and is connected with a computer terminal 22 through a data acquisition device 21.
(3) Filling a soil sample into the model groove 7, adding water through a dynamic water injection device to slowly saturate the soil sample until air in the soil sample is completely removed
(4) The dynamic fluctuation pressure is set for the flowing water injection device to obtain the required dynamic fluctuation water pressure, the flowing water injection device applies the water pressure which is regularly changed along with the time to the model groove 7 through the water permeable plate 9 to simulate the pressure change of the fluctuation water pressure of the tide, the water pressure given by the flowing water injection device is gradually reduced along with the increase of the distance due to the resistance in the soil sample, the soil sample in the model groove has the pressure change, and the dynamic fluctuation water pressure finally acts on the supporting structure 8.
(5) The micro pore water pressure gauge 19 on the model box records the pressure value of the space in the soil, the data is transmitted to the computer terminal 22 through the data acquisition device 21, the pressure values at different distances from the sea in the soil are observed, and a pressure change curve can be made.
(6) One end of a pressure-resistant pipe 24 is connected with a bolt hole in the supporting structure 8, one end of the pressure-resistant pipe is connected with the mixture separation device 14, other bolt holes in the supporting structure 8 are plugged by bolts, the damage condition of the supporting structure is simulated, soil and water in the mold groove 7 flow into the water-soil separation device through holes in the supporting structure 8 under the action of pressure, the soil and the water flow into the mixture separation device 14 through the pressure-resistant pipe 24 and then flow into the water storage tank 15 through the pressure-resistant pipe 24, and the record is recorded at t 1Parameter M shown by electronic scale 16 at any moment 1', at t 2Parameter M indicated by electronic scale 16 1"; electronic scale 17 at t 1Parameter M shown at the moment 2', at t 2Parameter M indicated by electronic scale 17 2". The soil output can be obtained through a soil output formula, and the water output can be obtained through a water output formula. And recording the soil output and water output of the specific position.
(7) The monitoring device transmits data to a computer terminal 22 through a micro pore water pressure gauge 19 and a resistance strain gauge 20 on the supporting structure 8, and records the pressure and the strain on the supporting structure 8 in real time. And respectively carrying out a pressure distribution diagram and a strain distribution diagram on the measured pressure data and strain data, and representing the influence of the tide fluctuation change on the supporting structure.
And (3) finishing a group of experiments, changing the distance between the permeable plate 9 and the supporting structure 8, and repeating the steps to finish all the experiments.
The above description is only an exemplary embodiment of the present invention, and the scope of the present invention should not be limited accordingly. The equivalent changes and modifications made according to the patent scope and the content of the specification of the present invention should still fall within the scope covered by the present invention.
Claims (5)
1. The near-sea foundation pit supporting structure model test device is characterized by comprising a dynamic water injection device, a model box, a water-soil separation device and a monitoring device;
The moving water injection device is used for injecting water like a model box, and the water is changed in a sine or cosine curve regularity along with time so as to simulate sea wave and tide changes;
The model box is used for simulating foundation pit supporting structures at different distances from the sea, and soil samples are filled in the model box;
The water-soil separation device is used for simulating the condition that the supporting structure of the foundation pit is damaged and the soil infiltration and water seepage are caused, and measuring the soil output and the water output;
The monitoring device records the water pressure of water flow passing through a certain position in the model box in real time; the monitoring device records the pressure and the strain magnitude in the horizontal and vertical directions of the foundation pit supporting structure at different positions in real time.
2. The test device for the model of the temporary sea foundation pit supporting structure according to claim 1, characterized in that: the dynamic water injection device comprises an air compressor, an adjusting valve, a gas-liquid pump, a plunger system, a water tank and a fluctuation acquisition sensor;
The air compressor is connected with the regulating valve through a flange, the regulating valve is connected with the gas-liquid booster pump through a pressure-resistant pipe, the gas-liquid booster pump is connected with the plunger system through a pressure-resistant pipe, and the gas-liquid booster pump is connected with the water tank through a guide pipe;
When the gas-liquid booster pump works, the piston runs backwards to suck water in the water tank into the gas-liquid pump, the one-way valve at the inlet of the gas-liquid pump is opened, and air enters the gas-liquid pump through the pressure-resistant pipe; when the piston moves forwards, a certain pressure is formed on one side of the liquid, the one-way valve at the outlet of the gas-liquid pump is opened, high-pressure water flows out from the outlet, the high-pressure water is injected into the plunger system through the pressure-resistant pipe, the plunger system utilizes the action of the piston to enable the pressure of the high-pressure water to change in a sine or cosine curve mode regularly along with time, therefore, the dynamically fluctuating water pressure is obtained, and then the water is injected into the model box through the pressure-resistant pipe.
3. The coastal foundation pit supporting structure model test device of claim 2, characterized in that: the model box comprises a model groove, a permeable plate and a supporting structure;
The mold groove comprises an aluminum top cover, an aluminum bottom plate, an aluminum side wall and an organic glass side wall; the aluminum side wall is placed at the back, the organic glass side wall is placed at the front, the tops of the aluminum side wall and the organic glass side wall are respectively connected and fixed with the aluminum top cover through flanges, and the bottom of the aluminum side wall and the organic glass side wall is connected and fixed with the aluminum bottom plate through flanges;
The aluminum material top cover, the aluminum material bottom plate and the inner side axisymmetric positions of the aluminum material side walls are respectively provided with a slide rail, and the aluminum material top cover and the aluminum material bottom plate are provided with a plurality of bolt holes along the slide rails; the supporting structure is fixed at the tail end of the model groove through bolts and used for simulating Larsen steel sheet piles in foundation pit engineering; 6 bolt holes which are bilaterally symmetrical are formed in a web plate of the supporting structure and used for simulating leakage holes generated by the damage of the supporting structure; the porous disk links to each other with moving water injection device through withstand voltage pipe, arranges the mould inslot in, and three recesses are dug respectively at three sides of laminating top cap, bottom plate, aluminium material lateral wall to the porous disk, agrees with the slide rail in mould groove, makes the porous disk move in the direction that the mould inslot is close to supporting construction or keeps away from supporting construction to adjust its in the mould inslot position in order to simulate the excavation supporting construction of facing the sea different distances.
4. The coastal foundation pit supporting structure model test device of claim 3, characterized in that: the water-soil separation device comprises a pressure-resistant pipe, a pipeline, a mixture separation device, a liquid storage tank, two electronic scales and a filter screen;
One end of the pressure-resistant pipe is connected with a bolt hole on the supporting structure, the other end of the pressure-resistant pipe is connected with the mixture separation device, one end of the pipeline is connected with the mixture separation device, the other end of the pipeline is guided to the liquid storage tank, and the mixture separation device and the liquid storage tank are respectively placed on the two electronic scales to read data in real time;
The mixture separation device consists of an upper organic glass cylinder and a lower organic glass cylinder, and a silica gel plate is arranged between the upper organic glass cylinder and the lower organic glass cylinder for sealing; the upper and lower organic glass cylinders are provided with flanges and fixed through bolts, and a filter screen is arranged between the upper and lower organic glass cylinders to prevent solid particles at the lower part from passing through so as to realize solid-liquid separation;
The liquid flows into a liquid storage tank through a pipeline, and the liquid storage tank is composed of four pieces of organic glass and is a square organic glass groove with an upper opening.
5. The coastal foundation pit supporting structure model test device of claim 4, characterized in that: the monitoring device comprises a micro void water pressure gauge, a resistance strain gauge, a data acquisition device and a computer terminal;
The micro pore water pressure gauge is arranged on the organic glass side plate of the mold groove and is connected to the computer terminal through the data acquisition and transmission module;
The supporting structure is evenly provided with a plurality of micro pore water pressure gauges and a plurality of resistance strain gauges in the horizontal and vertical directions, the micro pore water pressure gauges and the resistance strain gauges are connected to a computer terminal through a data acquisition device, and the stress of the supporting structure in different positions and the strain magnitude in the horizontal and vertical directions can be monitored and recorded in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921597416.0U CN211200492U (en) | 2019-09-24 | 2019-09-24 | Near-sea foundation pit supporting structure model test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921597416.0U CN211200492U (en) | 2019-09-24 | 2019-09-24 | Near-sea foundation pit supporting structure model test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211200492U true CN211200492U (en) | 2020-08-07 |
Family
ID=71853428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921597416.0U Active CN211200492U (en) | 2019-09-24 | 2019-09-24 | Near-sea foundation pit supporting structure model test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211200492U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552383A (en) * | 2019-09-24 | 2019-12-10 | 华侨大学 | Near-sea foundation pit supporting structure model test device |
-
2019
- 2019-09-24 CN CN201921597416.0U patent/CN211200492U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552383A (en) * | 2019-09-24 | 2019-12-10 | 华侨大学 | Near-sea foundation pit supporting structure model test device |
| CN110552383B (en) * | 2019-09-24 | 2023-12-29 | 华侨大学 | Model test device for supporting structure of foundation pit in sea |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105604106B (en) | Ocean engineering pile foundation experiment simulation apparatus and method under long-term horizontal cyclic loading | |
| Broms et al. | Stability of clay at vertical opening | |
| CN108008116B (en) | Vacuum preloading and electroosmosis combined test device | |
| CN106840086B (en) | Quick consolidation soft soil test device of ultralow position vacuum preloading method | |
| CN109386270A (en) | Coal rock layer mash gas dynamic is anti-reflection seepage flow and displacement simulation pilot system and test method | |
| CN108036985B (en) | Device and method for manufacturing split grouting slurry vein and detecting permeability coefficient | |
| CN1932169A (en) | Analogue experiment stand for interreaction of tunnel structure, surrounding rock and underground water | |
| CN102620996A (en) | Operational method for measuring creep parameters and infiltration parameters of smashed rocks simultaneously | |
| CN107727342A (en) | Wave load loading device and test method based on model groove | |
| CN105606461A (en) | Liftable loading mechanism and shear-seepage coupling testing device applying same | |
| CN109930635A (en) | The model system and test method of single-pile foundation in a kind of silt soil strata | |
| CN211200492U (en) | Near-sea foundation pit supporting structure model test device | |
| CN103900906A (en) | Test device and method of air accumulating model under geomembrane | |
| CN109946212A (en) | It is a kind of for testing the experimental rig and method of coarse fracture seepage characteristic | |
| Yoshimi | An experimental study of liquefaction of saturated sands | |
| CN208256156U (en) | Earthquake triggering underwater landslide disaster simulation test platform | |
| CN112986101A (en) | Earth and rockfill dam sand gravel dam building material horizontal permeability characteristic test method | |
| CN110552383A (en) | Near-sea foundation pit supporting structure model test device | |
| CN112945595A (en) | Test equipment and test method for silt dam bursting process | |
| CN112459840A (en) | Tunnel rich water and dry water alternate surge test device and method based on degradation characteristics | |
| CN205262912U (en) | Experimental device for it constructs sludge -biofilm formation to be used for simulating shield | |
| CN113640188B (en) | Testing device and method for simulating in-situ stress field of clay stratum around pile | |
| CN208805482U (en) | The condensation of grouting at the tail of the shield machine slurries and duct piece float upward process model experimental rig | |
| CN110528602A (en) | Earth lateral pressure experiment simulator under diaphram wall difference level of ground water operating condition | |
| CN112284992B (en) | Device and method for monitoring soil body mechanical response whole process in gas permeation process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |