CN117419943B - Ocean underground space model test device and method - Google Patents
Ocean underground space model test device and method Download PDFInfo
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- CN117419943B CN117419943B CN202311744427.8A CN202311744427A CN117419943B CN 117419943 B CN117419943 B CN 117419943B CN 202311744427 A CN202311744427 A CN 202311744427A CN 117419943 B CN117419943 B CN 117419943B
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- 238000012360 testing method Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000012544 monitoring process Methods 0.000 claims abstract description 27
- 238000010998 test method Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 230000002706 hydrostatic effect Effects 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 17
- 230000002411 adverse Effects 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 8
- 238000004458 analytical method Methods 0.000 abstract description 5
- 238000011161 development Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a marine underground space model test device and a marine underground space model test method, and belongs to the field of marine underground spaces. The marine underground space model test device comprises: comprising the following steps: island body model, steelframe, flexible parcel bag, loading system, sensor and monitoring control system, the steelframe is equipped with test area in the periphery, flexible parcel bag sets up in test area, island body model seals in flexible parcel bag, loading system includes the rigidity loading equipment and the water pressure loading equipment of being connected with the steelframe, rigidity loading equipment is configured to can apply rigidity pressure to island body model, water pressure loading equipment is configured to can apply water pressure to island body model, monitoring system configuration has a plurality of sensors, and set up in flexible parcel bag, loading system sensor and monitoring control system signal connection. By adopting the marine underground space model test device and the marine underground space model test method provided by the embodiment of the invention, the marine underground engineering construction process in the prior art can be propelled according to the stress condition analysis of the simulated marine underground space.
Description
Technical Field
The invention relates to the field of ocean underground space, in particular to an ocean underground space model test device and method.
Background
Compared with land underground engineering, the geological environment faced by the development of the ocean underground space is obviously different and the stress seepage boundary condition is extremely complex. In the drilling and blasting or mechanical excavation process, the surrounding rock pressure bears higher seawater seepage pressure at the same time, so that disasters such as large deformation, gushing water and the like are easily caused; the supporting structure faces multiple influences such as high-pressure seawater infiltration corrosion, vibration and the like; the main structure is more suitable for the requirement of a prefabricated rapid construction mode, and no model test device for island underground space development is available in domestic scope. The area of soil body of the ocean island exposed out of the ocean plane is extremely limited, the construction of the ocean underground space is favorable for relieving land shortage, the development efficiency of the power-assisted ocean resources is improved, and the capability of personnel and materials on the island to resist typhoons and other extreme conditions is enhanced. Therefore, development and construction technology research of ocean underground space including excavation, support, impermeability, corrosion resistance, monitoring and the like are required to be carried out, and safety and stability in the process of submerged engineering construction and operation are ensured.
In order to solve the technical problems, the invention provides an underground space model test device and method suitable for the ocean underground engineering construction process.
Disclosure of Invention
The embodiment of the invention provides a marine underground space model test device and a marine underground space model test method, which can be used for promoting the construction process of marine underground engineering in the prior art according to the stress condition analysis of a simulated marine underground space.
The technical scheme is as follows:
an ocean subsurface space model test apparatus comprising: island body model, steel frame, flexible wrapping bag, loading system, sensor and monitoring control system,
the inner periphery of the steel frame is provided with a test area, the flexible wrapping bag is arranged in the test area, the island body model is sealed in the flexible wrapping bag,
the loading system comprises a rigid loading device and a hydraulic loading device, wherein the rigid loading device is connected with the steel frame and is configured to apply rigid pressure to the island body model, the hydraulic loading device is configured to apply hydraulic pressure to the island body model,
the plurality of sensors are arranged in the flexible wrapping bag,
the loading system and the sensor are in communication connection with the monitoring control system.
Optionally, the cross section of island body model is the trapezium structure that has the inclined plane, and through the inclined plane will flexible parcel bag inside separates into solid domain and liquid domain, the inclined plane with flexible parcel bag's inner wall junction is equipped with the rubber sealing strip.
Optionally, the steel frame comprises a top plate, a bottom plate and two side plates arranged in parallel, wherein the top plate is arranged in parallel with the bottom plate, the side plates are perpendicular to the top plate and the bottom plate, the top plate, the bottom plate and the two side plates,
the rigid loading equipment comprises a jack and a rigid loading control box, and the jack is arranged between the top plate and the island body model.
Optionally, the hydraulic loading device comprises a hydraulic loading control box, a dynamic hydraulic loading device and a hydrostatic loading device, wherein the dynamic hydraulic loading device and the hydrostatic loading device are communicated with the inside of the flexible wrapping bag, the dynamic hydraulic loading device is used for applying dynamic hydraulic load to the island body model, and the hydrostatic loading device is used for applying hydrostatic load to the island body model.
Optionally, a first truss is arranged between the steel frame and the flexible wrapping bag, and the jack is arranged between the first truss and the flexible wrapping bag, which are close to one side of the top plate.
Optionally, two sides of the test area are provided with second trusses, and the second trusses are connected with the first trusses.
Optionally, a sealing plate is arranged between the second truss and the flexible wrapping bag, and the sealing plate covers two sides of the test area.
Optionally, the curb plate is kept away from be provided with first bracing piece on the face of test area one side the second truss is kept away from one side of test area is provided with the second bracing piece.
Optionally, the second truss is hinged to the first truss located on the bottom plate, and the second supporting rod is a hydraulic supporting rod.
A marine underground space model test method based on the marine underground space model test device comprises the following steps:
step one: manufacturing the island body model, arranging the island body model and the sensor in the flexible wrapping bag of the test area, and sealing the flexible wrapping bag;
step two: the hydraulic loading equipment is controlled by the monitoring control system to fill the flexible wrapping bag with water, the loading system is controlled to enable the island model to reach the requirements of a model test, the stress condition of the island in the natural state is simulated, the island is kept for a period of time, data are monitored, and the island is waited for data stabilization;
step three: the loading system is controlled to gradually apply pressure to the island body model until the island body model is damaged in an adverse way, and the maximum adverse load combination which can be born by the natural island body is determined;
step four: repeating the first step to the second step, digging out a space area from the island body model, monitoring and recording data in real time, and repeating the third step to determine the maximum unfavorable load combination under the unsupported state of the underground space;
step five: and (3) repeating the steps one to two, digging out a space area from the island body model, monitoring and recording data in real time, performing simulated support of the anchor rod and lining on the space area, and repeating the step three to determine the maximum unfavorable load combination under the supported state of the underground space.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
according to the marine underground space model test device and method provided by the embodiment of the invention, the stress condition of the island body in the marine environment can be simulated, and the maximum unfavorable load test analysis can be carried out on the natural island body, the underground space in the unsupported state and the underground space in the supported state in batches. The test conclusion and data obtained by using the marine underground space model test device and method can provide references and bases for marine underground space development site selection design, excavation mode selection, support process optimization and the like, and can effectively ensure safety and stability in the marine underground engineering construction and operation process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an overall assembly provided by an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic front view of a steel frame according to an embodiment of the present invention;
FIG. 4 is a schematic view of a sensor arrangement provided by an embodiment of the present invention;
FIG. 5 is a schematic side view of a steel frame with a hydraulic support bar closed according to an embodiment of the present invention;
FIG. 6 is a schematic side view of a steel frame in cross section when the hydraulic support bar is started according to an embodiment of the present invention;
FIG. 7 is a schematic front view of a closure plate according to an embodiment of the present invention;
FIG. 8 is a schematic top cross-sectional view of a closure panel provided in an embodiment of the present invention;
FIG. 9 is a schematic view of a side plate according to an embodiment of the present invention;
FIG. 10 is a schematic view of a working surface of a pressurized jet head with dynamic water pressure according to an embodiment of the present invention;
FIG. 11 is a flow chart of a test method provided by an embodiment of the present invention.
In the figure: 1-island body model; 11-rubber sealing strips; 12-spatial region; 13-inclined plane; 2-a steel frame; 21-top plate; 22-a bottom plate; 23-side plates; 231-dynamic water pressure loading water inlet channel; 232-hydrostatic loading of the water inlet channel; 233-liquid domain water pressure unloading return water channel 233; 24-test area; 3-flexible wrap-bag; 3 a-solid domain; 3 b-liquid domain; 4-loading the system; 41-a rigid loading device; 411-jack; 412-rigid load control box; 42-water pressure loading device; 421-hydraulic loading control box; 422-hydrodynamic loading device; 4221-a first water pump; 4222-hydrodynamic connecting pipe; 4223-hydrodynamic pressurized spray head; 423-hydrostatic loading apparatus; 4231-a second water pump; 4232-hydrostatic connection tube; 5-a sensor; 6-monitoring a control system; 71-a first truss; 72-a second truss; 8-a closing plate; 81-air filling holes; 82-layering; 91-a first support bar; 92-a second support bar.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of an overall assembly provided by an embodiment of the present invention; FIG. 2 is an enlarged schematic view of FIG. 1 at A provided in accordance with an embodiment of the present invention; FIG. 3 is a schematic front view of a steel frame according to an embodiment of the present invention; FIG. 4 is a schematic view of a sensor arrangement provided by an embodiment of the present invention; FIG. 5 is a schematic side view of a steel frame with a hydraulic support bar closed according to an embodiment of the present invention; FIG. 6 is a schematic side view of a steel frame in cross section when the hydraulic support bar is started according to an embodiment of the present invention; FIG. 7 is a schematic front view of a closure plate according to an embodiment of the present invention; FIG. 8 is a schematic top cross-sectional view of a closure panel provided in an embodiment of the present invention; FIG. 9 is a schematic view of a side plate according to an embodiment of the present invention; FIG. 10 is a schematic view of a working surface of a pressurized jet head with dynamic water pressure according to an embodiment of the present invention; FIG. 11 is a flow chart of a test method provided by an embodiment of the present invention. As shown in fig. 1 to 11, an embodiment of the present invention provides a marine subsurface space model test device, including: island body model 1, steelframe 2, flexible parcel bag 3, loading system 4, sensor 5 and monitoring control system 6.
Wherein, the steel frame 2 is surrounded and is equipped with test area 24, and flexible parcel bag 3 sets up in test area 24, and island body model 1 seals in flexible parcel bag 3, and loading system 4 includes rigid loading device 41 and the hydraulic loading device 42 that is connected with steel frame 2, and rigid loading device 41 is configured to can exert rigid pressure to island body model 1, and hydraulic loading device 42 is configured to can exert hydraulic pressure to island body model 1, and sensor 5 is provided with a plurality ofly, and is located flexible parcel bag 3, loading system 4 and sensor 5 and monitoring control system 6 communication connection.
Illustratively, in the embodiment of the present invention, the island body model 1 is manufactured according to the physical and mechanical properties of the actual ocean underground rock-soil body, as shown in fig. 4, the sensors 5 are distributed in an array manner and placed in the island body model 1 in the process of manufacturing the island body model 1, the island body model 1 is placed in the flexible wrapping bag 3, the sensor 5 for measuring the pressure in the water body is also placed in the flexible wrapping bag 3, the sealed flexible wrapping bag 3 is placed in the test area 24, the hydraulic loading device 42 is controlled by the monitoring control system 6 to fill the flexible wrapping bag 3 with the water body, the loading system 4 is controlled to enable the island body model 1 to achieve the stress condition required by the model test, the stress condition of the island body in the natural state is simulated, the island body model 1 is maintained for a period of time, the monitoring data is kept waiting for the data to be stable, the loading system 4 is controlled to gradually apply the pressure until the island body model 1 is damaged disadvantageously, the numerical value obtained by the sensor 5 is monitored during the island body model 1, and the maximum adverse load combination which can be born by the natural body is measured. Taking out the island body model 1 subjected to the test, putting in a new island body model 1 to carry out a second test, repeating the steps until the island body model 1 reaches the requirement of the model test, digging out a space region 12 from the island body model 1 after simulating the stress condition of the island body in a natural state, monitoring and recording data in real time, and controlling a loading system 4 to gradually apply pressure to the island body model 1 until the island body model 1 is damaged in an adverse way, wherein the maximum adverse load combination under the condition that the underground space is not supported is measured. And taking out the island body model 1 subjected to the test again, putting a new island body model 1 into the island body model 1 to perform a third test, repeating the steps until the island body model 1 reaches the stress condition required by the model test in the natural state of the island body, then, digging out the space region 12 from the island body model 1, performing the simulation support of the anchor rod and the lining on the space region 12, monitoring and recording data in real time, and controlling the loading system 4 to gradually apply pressure to the island body model 1 until the island body model 1 is damaged in an adverse way, and measuring the maximum adverse load combination in the supported state of the underground space.
According to the marine underground space model test device and the marine underground space model test method, the stress condition of the island body in the marine environment can be simulated, the natural island body, the underground space in the unsupported state and the underground space in the supported state can be subjected to test analysis of the maximum unfavorable load in batches, the analysis of test results can be applied to the actual building process of the marine underground space, collapse of the marine underground space in the building process can be avoided through the test results and the data of the marine underground space model test device and the marine underground space model test method, and safety and stability in the underground engineering building and operation process can be ensured.
Optionally, the cross section of the island body model 1 is a trapezoid structure with an inclined plane 13, the inside of the flexible wrapping bag 3 is divided into a solid domain 3a and a liquid domain 3b through the inclined plane 13, and a rubber sealing strip 11 is arranged at the joint of the inclined plane 13 and the inner wall of the flexible wrapping bag 3.
In the embodiment of the present invention, during the process of loading the inclined plane 13 of the island body model 1 with the dynamic water pressure by the dynamic water pressure pressurizing nozzle 4223, a part of the water pressure may permeate to other surfaces of the island body model 1 through the connection between the island body model 1 and the flexible wrapping bag 3, which causes inaccuracy of the dynamic water pressure and the hydrostatic pressure applied to the island body model 1, affects the test result, and improves the accuracy of the test result of the marine underground space model test device by providing the rubber sealing strip 11 at the connection between the inclined plane 13 of the island body model 1 and the flexible wrapping bag 3.
Alternatively, the steel frame 2 includes a top plate 21, a bottom plate 22, and two side plates 23 arranged in parallel, the top plate 21 is arranged in parallel with the bottom plate 22, the side plates 23 are perpendicular to the top plate 21 and the bottom plate 22, the top plate 21, the bottom plate 22, and the two side plates 23, the rigid loading device 41 includes a jack 411 and a rigid loading control box 412, and the jack 411 is arranged between the top plate 21 and the island body model 1.
Illustratively, in the embodiment of the present invention, the rigid loading control box 412 is controlled by the monitoring control system 6 to transmit a signal for applying pressure to the jack 411, the jack 411 applies a rigid load to the top of the flexible wrapping bag 3, the rigid load is transmitted to act above the island body model 1, the rigid load is applied to the island body model 1, the range of the jack 411 is 50.0Mpa, the precision is one thousandth (1%o), and the stroke is 25cm. The rigid loading equipment 41 adopts the jack 411 and the rigid loading control box 412, has simple structure and easy operation, and improves the practicability of the marine underground space model test device.
Optionally, the hydraulic loading device 42 includes a hydraulic loading control box 421, a hydraulic loading device 422, and a hydrostatic loading device 423, where the hydraulic loading device 422 and the hydrostatic loading device 423 are in communication with the inside of the flexible wrapping bag 3, the hydraulic loading device 422 is used to apply a hydraulic load to the island body model 1, and the hydrostatic loading device 423 is used to apply a hydrostatic load to the island body model 1.
Illustratively, in the embodiment of the present invention, the side plate 23 is provided with a dynamic hydraulic loading water inlet channel 231, a hydrostatic loading water inlet channel 232 and a liquid domain water pressure unloading water return channel 233, the dynamic hydraulic loading water inlet channel 231, the hydrostatic loading water inlet channel 232 and the liquid domain water pressure unloading water return channel 233 can be communicated with the inside of the flexible wrapping bag 3, the dynamic hydraulic loading device 422 comprises a first water pump 4221, a dynamic hydraulic connecting pipe 4222 and a dynamic hydraulic pressurizing nozzle 4223, one end of the dynamic hydraulic connecting pipe 4222 is connected with the first water pump 4221, the dynamic hydraulic connecting pipe 4222 penetrates through the dynamic hydraulic loading water inlet channel 231 to communicate with the inside of the flexible wrapping bag 3, the other end of the dynamic hydraulic connecting pipe 4222 is connected with the dynamic hydraulic pressurizing nozzle 4223, the dynamic hydraulic pressurizing nozzle 4223 is arranged towards the inclined plane 13 of the island body model 1, the static hydraulic loading device 423 comprises a second water pump 4231 and a hydrostatic connecting pipe 4232, and the second water pump 4231 penetrates through the hydrostatic loading water inlet channel 232 to communicate with the inside of the flexible wrapping bag 3. The hydrostatic loading device 423 is 30.0Mpa in range, one thousandth (1 thousandth) in accuracy, the maximum dynamic hydraulic amplitude that the dynamic hydraulic loading device 422 can apply is 2.5Mpa, one thousandth (1 thousandth) in accuracy, and the frequency is 1-10Hz. The monitoring control system 6 controls the dynamic water pressure loading device 422 and the hydrostatic pressure loading device 423 by controlling the hydraulic loading control box 421, and the second water pump 4231 is used for adding water and boosting the pressure inside the flexible wrapping bag 3 to simulate the water pressure caused by the depth of the sea bottom, so that the hydrostatic pressure load is provided for the island body model 1, the first water pump 4221 is used for pumping water and the dynamic water pressure pressurizing nozzle 4223 is used for periodically pressurizing the inclined plane 13 of the island body model 1 to form water jet so as to simulate the dynamic water pressure impact of sea waves on the sea bottom, so that the dynamic water pressure load is provided for the island body model 1, and as shown in fig. 10, the working surface of the dynamic water pressure pressurizing nozzle 4223 is of a rectangular structure with a plurality of spray holes, so that the dynamic water pressure load can be applied to the island body model 1 more uniformly. The hydraulic loading control box 421, the dynamic hydraulic loading device 422 and the hydrostatic loading device 423 are adopted by the hydraulic loading device 42, so that dynamic hydraulic pressure and hydrostatic pressure generated in the ocean underground can be simulated simultaneously in the ocean environment, the structure is simple, the operation is easy, and the practicability of the ocean underground space model test device is improved.
Optionally, a first truss 71 is disposed between the steel frame 2 and the flexible wrapping bag 3, and a jack 411 is disposed between the first truss 71 and the flexible wrapping bag 3 near one side of the top plate 21.
In the embodiment of the present invention, the first truss 71 is disposed between the steel frame 2 and the flexible bag 3, so as to avoid deformation of the top plate 21 under the reaction force of the force when the jack 411 applies the rigid load to the flexible bag 3, and simultaneously, prevent deformation of the bottom plate 22 and the side plate 23 when the hydraulic load is applied, and due to the characteristics of the truss, a certain amount of deformation can also occur under the condition of providing a certain rigidity, and the service life of the marine underground space model test device is improved by providing the first truss 71.
Optionally, the test area 24 is provided with second trusses 72 on both sides, the second trusses 72 being connected to the first trusses 71.
Illustratively, in the embodiment of the present invention, the second trusses 72 are disposed at two sides of the test area 24, so that when the rigid load and the hydraulic load are applied to the island body model 1, the deformation of the island body model 1 to the outside of two sides of the test area 24 is reduced, the accuracy of the rigid load and the hydraulic load applied to the island body model 1 is improved, and the accuracy of the test result of the marine underground space model test device is improved by disposing the second trusses 72 at two sides of the test area 24.
Optionally, a sealing plate 8 is arranged between the second truss 72 and the flexible wrapping bag 3, and the sealing plate 8 covers two sides of the test area 24.
Illustratively, in the embodiment of the present invention, the sealing plate 8 is provided with an air-filling hole 81, and the sealing plate 8 is provided with a pressing bar 82. Laminating flexible parcel bag 3 one side surface and closing plate 8, compress tightly the layering 82 with the closing plate all around again, aerify between to closing plate 8 and flexible parcel bag 3 through the inflation hole 81 on the closing plate 8 for flexible parcel bag 3's opposite side surface and island body model 1 closely laminate, through setting up closing plate 8, can make flexible parcel bag 3's internal surface and island body model laminate inseparabler, thereby improved the precision of applying rigid load and hydraulic load to island body model 1, further improved the experimental result accuracy of this ocean underground space model test device.
Optionally, a first support bar 91 is provided on the side of the side plate 23 away from the test area 24, and a second support bar 92 is provided on the side of the second truss 72 away from the test area 24.
Illustratively, in the embodiment of the invention, the first supporting rod 91 and the second supporting rod 92 are arranged, so that a stable supporting force can be provided for the whole device when a rigid load and a hydraulic load are applied, collapse or damage of the device due to uneven stress caused by overlarge pressure in the test process is prevented, and the stability and the service life of the marine underground space model test device are improved by arranging the first supporting rod 91 and the second supporting rod 92.
Optionally, the second truss 72 is hinged to the first truss 71 on the base plate 22, and the second support bar 92 is a hydraulic support bar.
Illustratively, in the embodiment of the present invention, the second support rods 92 are hydraulic support rods, the second truss 72 may rotate around the first truss 71 on the base plate 22 to expose the test area 24, and in the beginning of the test, the second support rods 92 are controlled to open the second truss 72, so that the flexible parcel 3 and the island body model 1 are conveniently placed in the test area 24, and after the flexible parcel 3 and the island body model 1 are arranged, the second truss 72 is closed by controlling the second support rods 92, so that the second truss 72 is attached to the steel frame 2, thereby restoring the second truss 72 to a working state. Through setting up second bracing piece 92 to the hydraulic pressure bracing piece, improved the operation convenience of this ocean underground space model test device.
A marine underground space model test method based on the marine underground space model test device comprises the following steps:
s1: the island body model 1 is made, the island body model 1 and the sensor 5 are arranged in the flexible wrapping bag 3 of the test area 24, and the flexible wrapping bag 3 is sealed.
Specifically, the island body model 1 is manufactured according to the actual components under the ocean, the sensors 5 are distributed in an array mode in the island body model 1 manufacturing process, after two sealing plates 8 and the flexible wrapping bags 3 are assembled and combined, the island body model 1 is placed in the flexible wrapping bags 3, the sensors 5 for measuring the pressure in the water body are also placed in the flexible wrapping bags 3, the sealed flexible wrapping bags 3 are sealed, the test area 24 is placed, the second support rods 92 are operated, the second truss 72 is attached to the steel frame 2, and the surface of the island body model is completely attached through the air holes 81 on the sealing plates.
S2: the flexible wrapping bag 3 is filled with water body by the control of the monitoring and control system 6, the loading system 4 is controlled to enable the island body model 1 to achieve the requirements of model test, the stress condition of the island body in the natural state is simulated, the island body is kept for a period of time, data are monitored, and the data are waited for stability.
Specifically, the monitoring control system 6 controls the hydraulic loading device 42 to control the first water pump 4221 to pump water, fills the flexible wrapping bag 3 with water, controls the rigid loading device 41 to apply a rigid load to the island body model 1, controls the hydraulic loading device 42 to apply a hydraulic load to the island body model 1, enables the island body model 1 to achieve the requirements of a model test, simulates the stress condition of the island body in a natural state, keeps for a period of time, monitors data, and waits for data stabilization.
S3: the loading system 4 is controlled to gradually apply pressure to the island body model 1 until the island body model 1 is damaged in an adverse way, and the maximum adverse load combination which can be born by the natural island body is determined.
Specifically, the rigid loading device 41 is controlled to apply a rigid load to the island body model 1, the hydraulic loading device 42 is controlled to apply a hydraulic load to the island body model 1 until the island body model 1 is damaged in an adverse manner, and the values obtained by the sensors 5 are monitored, at which time the maximum adverse load combination that can be borne by the natural island body is measured.
S4: repeating S1 to S2, digging out the space region 12 from the island body model 1, monitoring and recording data in real time, repeating S3, and determining the maximum unfavorable load combination in the unsupported state of the underground space.
Specifically, the second support rods 92 are operated to separate the second truss 72 from the steel frame 2, test residues in the test area 24 are taken out, S1 to S2 are repeated, the space area 12 is excavated from the island body model 1, pressure data and water seepage amount are monitored and recorded in real time, S3 is repeated, and the maximum unfavorable load combination in the unsupported state of the underground space is measured.
S5: repeating S1 to S2, digging out the space region 12 from the island body model 1, monitoring and recording data in real time, performing simulated support of the anchor rod and lining on the space region 12, repeating S3, and determining the maximum unfavorable load combination under the supported state of the underground space.
Specifically, the second support bar 92 is operated to separate the second truss 72 from the steel frame 2, test residues in the test area 24 are taken out, S1 to S2 are repeated, the space area 12 is excavated from the island body model 1, pressure data and water seepage amount are monitored and recorded in real time, the space area 12 is subjected to simulated support of the anchor rods and the lining, S3 is repeated, and the maximum unfavorable load combination in the supported state of the underground space is measured.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention, but rather, the invention is to be construed as limited to the appended claims.
Claims (9)
1. An ocean underground space model test method is based on an ocean underground space model test device, and the ocean underground space model test device comprises: island body model (1), steel frame (2), flexible wrapping bag (3), loading system (4), sensor (5) and monitoring control system (6),
the inner periphery of the steel frame (2) is provided with a test area (24), the flexible wrapping bag (3) is arranged in the test area (24), the island body model (1) is sealed in the flexible wrapping bag (3),
the loading system (4) comprises a rigid loading device (41) and a hydraulic loading device (42) connected with the steel frame (2), wherein the rigid loading device (41) is configured to apply rigid pressure to the island body model (1), the hydraulic loading device (42) is configured to apply hydraulic pressure to the island body model (1),
the plurality of sensors (5) are arranged in the flexible wrapping bag (3),
the loading system (4) and the sensor (5) are in communication connection with the monitoring control system (6),
the method is characterized by comprising the following steps of:
step one: -making the island body model (1), arranging the island body model (1) and the sensor (5) within the flexible encapsulation balloon (3) of the test area (24), and sealing the flexible encapsulation balloon (3);
step two: the hydraulic loading equipment (42) is controlled by the monitoring control system (6) to fill the flexible wrapping bag (3) with water, the loading system (4) is controlled to enable the island body model (1) to achieve the requirements of model test, the stress condition of the island body in a natural state is simulated, the island body is kept for a period of time, data are monitored, and the island body is waited for data stabilization;
step three: the loading system (4) is controlled to gradually apply pressure to the island body model (1) until the island body model (1) is damaged in an adverse way, and the maximum adverse load combination which can be born by the natural island body is determined;
step four: repeating the first to second steps, digging out a space region (12) from the island body model (1), monitoring and recording data in real time, and repeating the third step to determine the maximum unfavorable load combination under the unsupported state of the underground space;
step five: and (3) repeating the steps one to two, digging out a space region (12) from the island body model (1), monitoring and recording data in real time, performing simulated support of the anchor rod and lining on the space region, and repeating the step three to determine the maximum unfavorable load combination under the supported state of the underground space.
2. The marine underground space model test method according to claim 1, wherein the cross section of the island body model (1) is of a trapezoid structure with an inclined plane (13), the inside of the flexible wrapping bag (3) is divided into a solid domain (3 a) and a liquid domain (3 b) through the inclined plane (13), and a rubber sealing strip (11) is arranged at the joint of the inclined plane (13) and the inner wall of the flexible wrapping bag (3).
3. The marine underground space model test method according to claim 1, wherein the steel frame (2) comprises a top plate (21), a bottom plate (22) and two side plates (23) arranged in parallel, the top plate (21) is arranged in parallel with the bottom plate (22), the side plates (23) are perpendicular to the top plate (21) and the bottom plate (22), the top plate (21), the bottom plate (22) and the two side plates (23),
the rigid loading device (41) comprises a jack (411) and a rigid loading control box (412), wherein the jack (411) is arranged between the top plate (21) and the island body model (1).
4. A marine subsurface space model test method according to claim 3, wherein the water pressure loading device (42) comprises a water pressure loading control box (421), a water pressure loading device (422) and a hydrostatic pressure loading device (423), the water pressure loading device (422) and the hydrostatic pressure loading device (423) are communicated with the inside of the flexible wrapping bag (3), the water pressure loading device (422) is used for applying a water pressure load to the island body model (1), and the hydrostatic pressure loading device (423) is used for applying a hydrostatic pressure load to the island body model (1).
5. A marine subsurface space model test method according to claim 3, wherein a first truss (71) is provided between the steel frame (2) and the flexible wrapping bag (3), and the jack (411) is provided between the first truss (71) and the flexible wrapping bag (3) near one side of the top plate (21).
6. A method of marine subsurface space model testing according to claim 5, wherein the test zone (24) is provided on both sides with a second truss (72), the second truss (72) being connected to the first truss (71).
7. The marine subsurface space model test method according to claim 6, wherein a sealing plate (8) is arranged between the second truss (72) and the flexible wrapping bag (3), and the sealing plate (8) is covered on two sides of the test area (24).
8. The marine subsurface space model test method according to claim 6, wherein a first support rod (91) is arranged on a plate surface of the side plate (23) far away from the test area (24), and a second support rod (92) is arranged on a side of the second truss (72) far away from the test area (24).
9. A marine subsurface space model test method according to claim 8, wherein the second truss (72) is hinged to the first truss (71) on the bottom plate (22), and the second support bar (92) is a hydraulic support bar.
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