CN110806304A - Experimental device and method for simulating water curtain water seal effects under different engineering geological conditions - Google Patents
Experimental device and method for simulating water curtain water seal effects under different engineering geological conditions Download PDFInfo
- Publication number
- CN110806304A CN110806304A CN201911203764.XA CN201911203764A CN110806304A CN 110806304 A CN110806304 A CN 110806304A CN 201911203764 A CN201911203764 A CN 201911203764A CN 110806304 A CN110806304 A CN 110806304A
- Authority
- CN
- China
- Prior art keywords
- water
- curtain
- cavern
- water curtain
- under different
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 555
- 230000000694 effects Effects 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000004088 simulation Methods 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000013461 design Methods 0.000 claims abstract description 7
- 230000003204 osmotic effect Effects 0.000 claims description 23
- 239000003673 groundwater Substances 0.000 claims description 22
- 239000013307 optical fiber Substances 0.000 claims description 19
- 238000009826 distribution Methods 0.000 claims description 13
- 239000011435 rock Substances 0.000 claims description 8
- 238000002474 experimental method Methods 0.000 claims description 5
- 238000010835 comparative analysis Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000007599 discharging Methods 0.000 description 8
- 239000011521 glass Substances 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 239000013535 sea water Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G5/00—Storing fluids in natural or artificial cavities or chambers in the earth
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses an experimental device and a method for simulating water curtain water sealing effects under different engineering geological conditions, wherein the experimental device comprises a geological layer model, a water supply device and a data acquisition device, the geological layer model comprises a water tank, a chamber and an underground water simulation device are arranged at the bottom in the water tank, a simulated geological layer material is filled in the water tank, the geological layer material and a simulated object material meet similar conditions, the underground water simulation device comprises a water curtain pipeline, and the water curtain pipeline is arranged around the chamber; the device and the method can provide data similar to real simulation for analyzing water seal effect of the water curtain under different engineering geological conditions, and further provide design reference for engineering.
Description
Technical Field
The invention belongs to the technical field of underground cavern oil storage, and particularly relates to an experimental device and method for simulating water curtain water seal effects under different engineering geological conditions.
Background
Petroleum is an important strategic resource of the country, the life line of the national economy is mastered, and the petroleum reserve has important influence on the establishment of the security and policy of one country. The underground water-sealed oil depot technology is favored by various countries due to the advantages of large capacity, high safety, good concealment and the like. In the process of storing oil in an underground cave depot, in order to ensure that oil products are not leaked and safe operation is ensured, higher requirements are put forward on the water sealing property of the oil products. In the currently constructed or operated oil storage cavern engineering in China, the research on the water sealing performance of the underground water-sealed oil depot is mostly based on numerical simulation software, and whether a set of experimental device for judging the water sealing effect of a water curtain can be designed and the optimization of the traditional water curtain arrangement becomes a hot problem to be solved urgently.
At present, some research institutions or production units may perform relevant field tests, but no institution or individual provides an experimental device for judging and optimizing the water-curtain water-sealing effect under different engineering geological conditions, and the invention has important theoretical and practical significance for the water-curtain optimization design of the underground water-sealing oil depot.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the experimental device and the method for simulating the water curtain water sealing effect under different engineering geological conditions, the relative position relation of the underground water sealing oil depot is simulated, the engineering geological and hydrogeological environment of the underground cavern is restored, whether the water curtain can meet the required water sealing condition in the operation process of the underground oil storage cavern is well simulated, and guidance is provided for further optimizing the water curtain arrangement and improving the water sealing effect.
In order to achieve the purpose, the invention adopts the following technical scheme: an experimental device for simulating water curtain water seal effects under different engineering geological conditions comprises a geological layer model, a water supply device and a data acquisition device, wherein the geological layer model comprises a water tank, a cavern and an underground water simulation device are arranged at the bottom in the water tank, a simulated geological layer material is filled in the water tank, the geological layer material and a material of a simulation object meet similar conditions, the underground water simulation device comprises a water curtain pipeline, and the water curtain pipeline is arranged around the cavern; a water permeable hole is arranged on the water curtain pipeline, a water inlet of the water curtain pipeline is communicated with a water supply device, and a valve is arranged between the water supply device and the inlet of the water curtain pipeline; the data acquisition device comprises a distributed optical fiber sensor, a stress-strain sensor and a flowmeter, a waterproof layer and a drainage structure are arranged at the bottom of the cavern, the flowmeter is arranged at an outlet of the drainage structure, the distributed optical fiber sensor, the stress-strain sensor and the flowmeter are all connected with the data acquisition center, the distributed optical fiber sensor and the stress-strain sensor are buried in a geological layer material, and a group of water faucets are arranged on the water tank along the vertical direction.
At least three water taps are arranged on the same vertical line.
The bottom of the cavern is provided with a water collecting ditch which is communicated with a drain pipe, and the drain pipe is provided with a flowmeter; the bottom surface of the cavern is provided with a slope, and the joint of the water collecting ditch and the water drainage pipe is the lowest part of the slope.
The water supply device comprises a water collecting tank and a water guide pipe, wherein a plurality of water outlets are formed in the bottom of the water collecting tank, one end of the water guide pipe is connected with the water outlets, the other end of the water guide pipe is connected with a water inlet of the water curtain pipeline, and a valve is arranged on the water guide pipe.
The water supply device further comprises a support and a support base, the support is arranged on the support base, a sliding block is arranged on the support, and the water collecting tank is connected with the sliding block.
The side of basin adopts double-deck design, and the inlayer is permeable structure, and the skin is waterproof construction.
The water curtain pipeline is arranged into a horizontal water curtain pipeline, a vertical water curtain pipeline, an inclined water curtain pipeline or a combination of the two.
The water curtain pipelines are uniformly arranged around the cavern.
An experimental method for judging water curtain water seal effects under different engineering geological conditions comprises the following steps:
step 4, changing the height of the water supply device, repeating the step 3, and acquiring osmotic pressure, water inflow, flow rate and stress strain data under different water head heights;
and 6, carrying out comparative analysis on the osmotic pressure, the water inflow amount, the flow rate and the stress strain acquired in the steps 4 and 5, and comparing the water sealing effects under different water curtain schemes.
And changing the state of the underground water in the stratum model by changing the opening of the faucet, so that the stratum model forms and acquires the data of osmotic pressure, water inflow, flow velocity and stress strain under the condition of different heights of the underground water.
Compared with the prior art, the invention has the following beneficial effects: the device can be used for simulating the water seal effect in different stratum models, and acquiring osmotic pressure, water inflow, flow velocity and stress strain data according to different simulation conditions, wherein the data can be used for analyzing and comparing the interaction among actual underground water caverns, water curtains, underground water and surrounding rock environments with the water seal effect under different water curtain schemes, so that the effect of the underground water and a water curtain system in the normal operation process of an underground water seal oil depot can be comprehensively considered, the device conforms to a similar theory with actual engineering, is representative of the actual engineering, has strong pertinence and can approach to the actual condition; the opening/closing of the valve between the water supply device and the water curtain pipeline is controlled, the spatial distribution of the water curtain pipeline can be directly changed, the complicated disassembly and manufacture procedures are reduced, and the spatial arrangement of the water curtain pipeline can be artificially and flexibly controlled; the data acquisition device at the periphery of the cavern model can dynamically simulate the stress-strain change rule of the cavern seepage field and the cavern surrounding rock in real time, and the various water curtain models can truly reflect the contribution rate of different water curtain schemes to the water seal effect of the underground cavern, so that the water curtain design is further optimized; the invention simulates different groundwater conditions and different water curtain space distribution conditions under different geological conditions, and can simulate various different working conditions by only changing the proportion of similar materials in the stratum model, changing the water level of the groundwater simulation device and changing the control switch of the water guide pipe in the water supply device of the water curtain hole model, thereby having good operability and repeatability.
Furthermore, at least three water taps are arranged on the same vertical line, so that the water tap is convenient to process, and the water can be discharged step by the aid of the water taps, so that the water discharging speed and the water level changing speed can be better controlled.
Further, a water collecting ditch is arranged at the bottom of the cavern and is communicated with a drain pipe, and a flowmeter is arranged on the drain pipe; the bottom surface of the cavern is provided with a slope, the joint of the water collecting ditch and the water discharging pipe is the lowest slope, the bottom of the cavern is provided with only one water outlet, and the water outlet is provided with a flowmeter, so that the water discharging flow can be conveniently recorded.
Furthermore, water supply installation includes header tank and aqueduct, and a plurality of delivery ports are seted up to the bottom of header tank, and the one end of aqueduct is connected the delivery port, the water inlet of water curtain pipeline is connected to the other end, is provided with the valve on the aqueduct, and the aqueduct is connected with water curtain pipeline one-to-one, can realize leading to water and change discharge to different regions, is favorable to changing according to the actual demand.
Further, water supply installation still includes support and support base, and the support setting is provided with the slider on the support base, and the header tank is connected with the slider, can further change the flood peak height of header tank through rising or reducing the height that the slider changed the header tank.
Further, the water curtain pipe arrangement adopts different water curtain pipe arrangement directions for horizontal water curtain pipe, perpendicular water curtain pipe, slope water curtain pipe or adopts wherein the combination of two kinds, can simulate the secret rivers condition of different rivers directions, improves the practicality of this device.
The method comprises the steps of configuring geological layer materials according to similar conditions, arranging a cavern, a water curtain pipeline, a water supply device, an optical fiber sensor and a flowmeter according to the device, starting the water supply device, observing, collecting seepage pressure, water inflow, flow velocity and stress strain data, changing test conditions and parameter monitoring parameters according to geological characteristics of a simulated geological layer, and finally obtaining data about the simulated geological layer to provide data closer to the real condition for analyzing the water curtain water sealing effect of the simulated geological layer.
Drawings
FIG. 1 is a front view of a body model of the present invention;
FIG. 2 is a top view of a water curtain hole pattern arrangement according to the present invention;
FIG. 3 is a front view of a water curtain hole pattern arrangement of the present invention;
FIG. 4 is a schematic view of a water supply apparatus for a water curtain hole model according to the present invention;
FIG. 5 is a schematic view of the bottom of the water supply device of the water curtain hole model of the present invention at the connection with the water conduit;
FIG. 6 is an enlarged partial view I of FIG. 1, illustrating a water guiding pipe according to the present invention;
FIG. 7 is a schematic view of an underground water simulation apparatus according to the present invention;
FIG. 8 is an enlarged partial view II of FIG. 1 illustrating the water curtain pipe of the present invention;
FIG. 9 is a schematic view of the water collection hole inside the cavern model of the invention;
FIG. 10 is a front view of a cavern model of the present invention;
in the figure, 1-support, 2-knob, 3-support base, 4-water flow, 5-water collecting tank, 6-water guiding pipe, 7-water curtain pipeline, 8-water tap, 9-distributed optical fiber sensor, 10-chamber, 11-water discharging pipe, 12-flowmeter, 13-water inlet, 14-water outlet, 15-rubber plug, 16-water tank, 17-permeable glass, 18-permeable hole, 19-water collecting ditch, 20-switch, 21-screw thread and 22-stratum model.
Detailed Description
The invention is explained in detail below with reference to specific embodiments and the accompanying drawings.
Referring to fig. 1 to 10, an experimental apparatus for simulating water curtain water seal effects under different engineering geological conditions comprises a geological layer model, a water supply device and a data acquisition device, wherein the geological layer model comprises a water tank 16, a chamber 10 and a groundwater simulation device are arranged at the bottom in the water tank 16, a simulated geological layer material is filled in the water tank 16, the geological layer material and a material of a simulation object meet similar conditions, the groundwater simulation device comprises a water curtain pipeline 7, and the water curtain pipeline 7 is arranged around the chamber 10; a water permeable hole 18 is arranged on the water curtain pipeline 7, a water inlet of the water curtain pipeline 7 is communicated with a water supply device, and a valve is arranged between the water supply device and the water curtain pipeline inlet; the data acquisition device comprises a distributed optical fiber sensor 9, a stress-strain sensor and a flowmeter, a waterproof layer and a drainage structure are arranged at the bottom of the cavern 10, the flowmeter 12 is arranged at the outlet of the drainage structure, the distributed optical fiber sensor 9, the stress-strain sensor and the flowmeter 12 are all connected with a data acquisition center, the distributed optical fiber sensor 9 and the stress-strain sensor are buried in a geological layer material, and a group of water taps 8 are arranged on the water tank 16 in the vertical direction.
At least three water taps 8 are arranged, and the water taps 8 are arranged on the same vertical line.
A water collecting ditch 19 is arranged at the bottom of the cavern 10, the water collecting ditch 19 is communicated with a drain pipe 11, and a flowmeter 12 is arranged on the drain pipe 11; the bottom surface of the cavern 10 is provided with a slope, and the joint of the water collecting ditch 19 and the water discharge pipe 11 is the lowest part of the slope.
The water supply device comprises a water collecting tank 5 and a water guide pipe 6, wherein a plurality of water outlets are formed in the bottom of the water collecting tank 5, one end of the water guide pipe 6 is connected with the water outlets, the other end of the water guide pipe 6 is connected with a water inlet of a water curtain pipeline 7, and a valve is arranged on the water guide pipe 6.
The water supply device further comprises a support 1 and a support base 3, the support 1 is arranged on the support base 3, a sliding block is arranged on the support 1, and the water collecting tank 5 is connected with the sliding block.
The side of the water tank 16 adopts a double-layer design, the inner layer is a water permeable structure, and the outer layer is a waterproof structure.
The water curtain pipeline is arranged into a horizontal water curtain pipeline, a vertical water curtain pipeline, an inclined water curtain pipeline or a combination of the two.
The water curtain pipes 7 are uniformly arranged around the cavern 10.
An experimental method for judging water curtain water seal effects under different engineering geological conditions comprises the following steps:
step 4, changing the height of the water supply device, repeating the step 3, and acquiring osmotic pressure, water inflow, flow rate and stress strain data under different water head heights;
and 6, carrying out comparative analysis on the osmotic pressure, the water inflow amount, the flow rate and the stress strain acquired in the steps 4 and 5, and comparing the water sealing effects under different water curtain schemes.
And changing the opening of the water faucet 8 to change the state of the underground water in the stratum model, so that the stratum model forms and acquires the osmotic pressure, water inflow, flow velocity and stress-strain data under the condition of different heights of the underground water.
An experimental device for judging and optimizing water curtain water seal effects under different engineering geological conditions comprises a stratum model, a cavern, a water supply device, a groundwater simulation device and a data acquisition device; the stratum model is provided with similar materials meeting the requirements of simulated strata, and the physical and mechanical parameters and the geometric dimensions of the similar materials meet the requirements of a similar theory.
As shown in fig. 1, 9 and 10, a cavern 10 is made of a water permeable material, the bottom surface of the cavern 10 is provided with a slope, the slope inclines towards a water collecting ditch, the ground of the cavern 10 is provided with a water collecting ditch 19, the water collecting ditch 19 is connected with a water discharging pipe 11, the water discharging pipe 11 is provided with a flowmeter 12, the joint of the water collecting ditch 19 and the water discharging pipe 11 is the lowest part of the bottom surface of the cavern 10, the cavern model is made of the water permeable material, the cavern model is required to reflect the real distribution characteristics of an underground space, the water permeable material is required to meet the requirement that surrounding water bodies are timely discharged into a cavern cavity; the bottom of the cavern model is made of a waterproof material and is provided with a sloping water collecting ditch 19 which is convenient for collecting seepage water, the outer side of the cavern 10 is provided with a drainage pipe 11, and the drainage pipe 11 is used for draining the seepage water and collecting and recording the seepage water in real time; flow meter 12 is connected to the input of the data collection center.
Be provided with the water curtain model around cavern 10, the water curtain model includes a plurality of water curtain pipelines 7, offers on the water curtain pipeline 7 to permeate water hole 18, and water curtain pipeline 7 adopts the copper pipe preparation, and the water curtain model is in cavern symmetric distribution all around, and the external diameter of water curtain pipeline 7 is 6mm, and the internal diameter is 3mm, and the hole diameter of permeating water is 3mm, and axial interval and circumference interval are 1.5 mm. The two ends of the water curtain pipeline 7 are provided with internal threads, and the internal threads are used for connecting an external water curtain water supply device.
The water curtain model is arranged according to the relative position relation of the water curtain and the cavern in the actual engineering, can specifically set up to horizontal water curtain, perpendicular water curtain or slope water curtain, also can make up different water curtain types, compares the water seal effect that different water curtain set up the scheme.
The water curtain water supply device mainly comprises a water collecting tank 5, a bracket 1 and a water guide pipe 6, wherein the water collecting tank 5 is arranged on the bracket 1, and the height of the water collecting tank 5 can be changed along the direction of the bracket 1; the bottom of the water collecting tank 5 is provided with a plurality of water outlet holes, the water outlet holes are connected with a water guide pipe 6, one end of the water guide pipe 6 is provided with a rubber plug 15, the other end of the water guide pipe is provided with an external thread joint, the water guide pipe 6 is also provided with a valve 20, the valve 20 is arranged at a position close to the water collecting tank 5,
as an optional embodiment, the bracket 1 adopts a screw rod, the knob 2 is arranged on the bracket 1, a sliding block is arranged above the knob 2, the sliding block is connected with the water collecting tank 5, the height of the water collecting tank 5 is controlled by the knob 2 on the axis of the bracket 1, the water level in the water collecting tank is controlled to be constant by the water inlet hole and the water outlet hole of the water collecting tank 5, the bottom of the water collecting tank 5 is connected with a water guide pipe 6, one end of the water guide pipe 6 is provided with a rubber plug 15, the other end of the water guide pipe 6 is connected into a water curtain model through an external thread joint, and the device can provide stable water head height; the water guide pipe 6 is provided with a valve for adjusting the closing of a single water curtain hole in the water curtain model;
as shown in fig. 1, 4 and 7, the groundwater simulation device is characterized in that a water tank 16 is made of a 1 cm-thick organic glass plate, the width of the water tank 16 is 5cm, the inner layer of the water tank 16 is made of permeable glass 17, the outer layer of the water tank 16 is made of impermeable glass, and a water supply device at the top of the water tank 16 is used for supplementing water to the water tank 16 at a set rate so as to simulate an actual stable natural groundwater level; the water tanks 16 are respectively provided with water taps 8 at three different heights to control different groundwater replenishing water heads, and water head changes caused by seasonal changes of groundwater levels or manual groundwater extraction can also be simulated;
the data acquisition device comprises a distributed optical fiber sensor 9, a stress-strain sensor and a flowmeter, wherein the distributed optical fiber sensor is used for acquiring and recording osmotic pressure of different parts of a cavern, water seepage quantity and flow velocity of the inner surface of the cavern, stress and strain of surrounding rocks of the cavern, and in the safe operation process of the cavern, a stress field is mainly concentrated in a triple tunnel-in-one range of the cavern, so that the stress-strain sensor can be mainly distributed in the triple tunnel-in-one range of the cavern, the seepage field is mainly concerned about the inrush flow and water sealing effect of the cavern, so that the flow-velocity sensor can be mainly arranged on the side wall of the cavern, or the flowmeter 12 is used for counting the inrush water quantity of the whole cavern, the water pressure sensor is distributed at the vault of the cavern, the osmotic pressure of a model is measured, the water sealing.
An experimental device for judging and optimizing water curtain water seal effects under different engineering geological conditions can be realized by adding island environments or structural models to stratum models of the device for complex geological environments such as island environments, regional fracture structures and the like; specifically, the method comprises the following steps: setting a structural model with similar material properties to the fracture zone, adding a thin layer in a corresponding stratum model to simulate the fracture zone, wherein the position of the thin layer can be reduced according to the information such as spatial occurrence, distribution and the like of actual structural development according to a similarity ratio, and the fracture model reflects the characteristics or the advantageous water guiding effect of the actual structural development; for the sea island environment, the seawater environment is simulated at the periphery of the underground water simulation device, or the salt is added in the underground water simulation device to simulate the seawater invasion problem, so that the simulation of the seawater environment is realized.
The evaluation on the water sealing effect of the model generally considers that the oil gas and the like in the cavern can be ensured not to leak without forming a 'sparse dry zone' on the top of the cavern, which indicates that the water sealing effect is good. In the model test, whether the water seal effect can meet the requirement is mainly judged according to whether the water seal pressure is 0.
The invention relates to an experimental method for judging and optimizing water seal effects of a water curtain under different engineering geological conditions, which comprises the following steps:
step 4, changing the height of the water supply device, repeating the step 3, and acquiring osmotic pressure, water inflow, flow rate and stress strain data under different water head heights;
and 6, carrying out comparative analysis on the osmotic pressure, the water inflow amount, the flow rate, the stress strain and the like acquired in the steps 4 and 5, and comparing the water sealing effects under different water curtain schemes.
Example 1:
in order to make the technical scheme and advantages of the invention more apparent, the invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the following disclosure is only illustrative of a preferred embodiment of the present invention. The scope of the invention should not be limited thereby, and modifications and alterations can be made by those skilled in the art without departing from the principles of the invention.
For simplifying the description, the experimental device for judging and optimizing the water seal effect of the water curtain under different engineering geological conditions is provided with the vertical water curtain distributed around the cavern, and comprises a stratum model 22 for simulating the actual engineering geology, water curtain hole models are uniformly distributed around the cavern model 10 according to water curtain pipelines 7 shown in figure 2, the water curtain water supply device mainly comprises a water collecting tank 5, a support 1 and a water guide pipe 6, the water collecting tank 5 is arranged on the support 1, and the height of the water collecting tank 5 can be changed along the direction of the support 1; the bottom of the water collecting tank 5 is provided with a plurality of water outlet holes, the water outlet holes are connected with the water guide pipe 6, one end of the water guide pipe 6 is provided with a rubber plug 15, the other end of the water guide pipe 6 is provided with an external thread joint, the water guide pipe 6 is also provided with a valve 20, the valve 20 is arranged at a position close to the water collecting tank 5, and the water guide pipe 6 is used for communicating the water curtain model with a water supply device of the water curtain hole model and is correspondingly connected up and down; the underground water simulation device mainly comprises a water tap 8, a water tank 16 and permeable glass 17; the opening degree of the water faucet 8 in the underground water simulation device is changed by changing the opening degree of the valve 20, and different conditions are simulated by different combination modes.
The bracket 1 and the bracket base 3 in the water supply device of the water curtain hole model keep the stability of the water collecting tank 5, and the knob 2 adjusts the up-and-down movement of the water collecting tank 5 through rotation to change a water head applied on a water curtain pipeline 7; the water collecting tank 5 adopts an open water collecting tank.
The water collecting tank 5 is provided with a water inlet 13 and a water outlet 14, and the water level is kept at the same height as the water outlet 14 and cannot be changed;
the tap 8 of the groundwater simulation device controls different groundwater heights, and the permeable glass 17 enables water to freely enter the internal cavern 10; drainage pipes 11 are connected to two sides of the cavern 10 and used for water body drainage, and a water collecting ditch 19 is arranged in the cavern 10 and used for collecting water and discharging the water from the drainage pipes 11; the bottom of the cavern 10 is made of impermeable materials, the gentle dip angle of the bottom is 1 degree, and water seepage collection is facilitated.
The data acquisition device comprises an optical fiber sensor 9, a drain pipe 11 and a flowmeter 12, wherein the distributed optical fiber sensor is adopted to measure the strain and the osmotic pressure of the top of the cavern, the flowmeter 12 is used for measuring the amount and the flow rate of drained water, and in addition, devices such as a stress-strain sensor and the like are arranged on the vault according to the needs; the water permeable holes 18 of the water curtain hole model 7 are uniformly arranged in a quincuncial pile shape to provide water curtain hole pressure for the periphery of the cavern.
Opening all water curtain pipelines for data acquisition; the outer side water curtain pipeline is controlled to be closed, the inner side water curtain pipeline is controlled to be opened, and the distance between the water curtain pipeline and the cavern can be changed; every other water curtain pipeline switch is opened, so that the arrangement distance of the water curtain pipelines can be changed; and vice versa; the knob 2 is rotated to change the head pressure, and the measurement is repeated.
FIG. 1 is a front view of a main model of the invention, the model uses similar materials of stratum as the stratum model, the groundwater simulation device simulates groundwater heads of different places to judge whether arrangement of water curtain holes is needed, a porous copper pipe is used as the water curtain hole, a water supply device of the top water curtain hole model provides a stable water head for the water curtain hole, the replenishment effect of the water curtain to a cavern in the actual engineering is simulated, and a data acquisition device is used for data acquisition.
FIGS. 2 and 3 are front and top views of a water curtain hole pattern arrangement of the present invention; the water curtain holes are symmetrically arranged around the cavern, the distance between the water curtain holes is 11cm, the outer diameter of the hole diameter is 6mm, the inner diameter is 3mm, the length of the water curtain hole model is 58cm, the distance between the bottom of the water curtain hole model and the water curtain hole is 12cm from the outermost side, the distance between the water tanks of the underground water device is 5cm, the underground cavern is in a prefabricated horseshoe shape, the width of the cavern is 10cm, the height of the cavern is 15cm, and the shortest distance between the two caverns is 5cm, so that similar geometric conditions are; the bottom of the water curtain hole and the bottom plate of the cavern are at the same elevation, the total height of the model is 80cm, referring to fig. 2 and fig. 3, the drain pipe extends out of the cavern to drain internal seepage water, and the pipe diameter of the drain pipe is 10mm and is connected to an outer data measuring device.
Fig. 4 is a schematic diagram of a water supply device, in which the height of a water head in a water collection tank is controlled to be kept unchanged through a water inlet 13 and a water outlet 14, a position water head of the water collection tank 5 is changed through a knob 2, and the position water head is changed to adjust the pressure of a water curtain hole according to the height ═ water head + height ↓ ═ water curtain head height ↓withinthe water collection tank 5; the water collecting tank 5 is connected with a bottom water guiding duct 6, refer to fig. 5.
Fig. 5 is a schematic view of the connection between the bottom of the water supply device and the water conduit of the water curtain hole model of the invention, fig. 6 is a schematic view of the water conduit of the invention, the rubber plug 15 at the bottom seals the bottom round hole of the opening to connect the water curtain hole, the other end of the water conduit 6 is screwed into the water curtain hole in the form of screw thread 21, and the valve 20 can control the opening and closing of the water conduit. Thereby adjusting the spatial position relationship of the water curtain holes.
Fig. 7 is a schematic view of the groundwater simulation device of the present invention, the width between two layers of side plates in the water tank is 5cm, the inner layer of glass plate is permeable glass 17, the water storage height is controlled by a water tap 8, different natural groundwater levels are controlled by three drainage water taps 8 with different heights, h1 is 30cm, h2 is 37cm, and h3 is 60cm, the necessity of setting a water curtain is verified by considering whether the different groundwater levels can form a natural water seal condition, and the setting of the water curtain is optimized;
when h1 is 30cm, the height of the water level of the water tank is less than the height of the top of the cavern, a 'drying area' is formed certainly, and the arrangement of the water curtain is indispensable; h2 is 37cm, the height of the water level of the water tank is equal to the height of the cavern, h3 is 60cm, the water level of the water tank is higher than the top height of the cavern, and the relation between the water seal performance of the cavern and the arrangement of the water curtain under different ground water level heights is researched respectively.
Fig. 8 is a schematic view of the water curtain model of the invention, fig. 9 is a schematic view of the water collection inside the cavern model of the invention, the water curtain pipeline 7 of the invention is provided with water permeable holes 18 along the pipe wall for providing water pressure to enter the surrounding rock of the cavern, the small holes are uniformly arranged, and the arrangement is shown in fig. 2 and 3.
FIG. 10 is a front view of the cavern model of the invention, the cavern model 10 is prefabricated by porous materials, the cavern is horseshoe-shaped, the width of the cavern is 10cm, the length of the cavern is 30cm, the height of the cavern is 15cm, the strength of the cavern is large, the cavern is not easy to deform, the floor of the cavern is provided with a waterproof layer which is impervious, and a concave water collecting ditch 19 is arranged at the central axis of the cavern for facilitating the collection of seepage.
Example 2
The device is used for an experimental device for researching the feasibility of island oil storage, salt water is filled in a groundwater simulation device, the corrosion of seawater to an underground storage (island oil storage) can be simulated, then a salt content meter is arranged at a water discharge pipe 11 to monitor the salt content of the underground storage, the salt content meter is connected with a data acquisition center, other monitoring means can be arranged to monitor a seawater migration path when similar materials at the periphery of a cavern are buried, and the blocking effect of a water curtain on the seawater is simulated; the method is characterized in that the height of a water head in a stratum model is changed in an underground water simulation device, the influence of different seawater pressures on a cavern is simulated, the closing of a water curtain hole is adjusted, and the spatial arrangement form of a water curtain is changed.
The invention provides an experimental device for judging and optimizing water seal effects of a water curtain under different engineering geological conditions. The device consists of a stratum model made of similar materials, a chamber model made of porous materials, a water curtain model made of a porous copper pipe, a water supply device of the water curtain hole model, a groundwater simulation device and a data acquisition device. The device can evaluate the necessity of arranging the water curtain hole, quantize the relation between the spatial arrangement of the water curtain and the water sealing effect of the cavern and provide guidance for the optimal design of the water curtain. The device can adjust the engineering geological conditions and the water curtain supply forms of various underground water seal caverns only by changing the similar material types and the similar ratio according to the engineering geological conditions of different underground water seal reservoirs and changing the opening and closing of the device, and has good repeatability.
The foregoing is a detailed description of the invention with reference to specific preferred embodiments, and no attempt is made to limit the invention to the particular embodiments disclosed, or modifications and equivalents thereof, since those skilled in the art may make various alterations and equivalents without departing from the spirit and scope of the invention, which should be determined from the claims appended hereto.
Claims (10)
1. The experimental device for simulating the water-curtain water-sealing effect under different engineering geological conditions is characterized by comprising a geological layer model, a water supply device and a data acquisition device, wherein the geological layer model comprises a water tank (16), a cavern (10) and an underground water simulation device are arranged at the bottom in the water tank (16), a simulated geological layer material is filled in the water tank (16), the geological layer material and a material of a simulation object meet similar conditions, the underground water simulation device comprises a water-curtain pipeline (7), and the water-curtain pipeline (7) is arranged around the cavern (10); a water permeable hole (18) is formed in the water curtain pipeline (7), a water inlet of the water curtain pipeline (7) is communicated with a water supply device, and a valve is arranged between the water supply device and the inlet of the water curtain pipeline; the data acquisition device comprises a distributed optical fiber sensor (9), a stress-strain sensor and a flowmeter, a waterproof layer and a drainage structure are arranged at the bottom of a cavern (10), the flowmeter (12) is arranged at the outlet of the drainage structure, the distributed optical fiber sensor (9), the stress-strain sensor and the flowmeter (12) are all connected with a data acquisition center, the distributed optical fiber sensor (9) and the stress-strain sensor are buried in a geological layer material, and a group of water taps (8) are arranged on a water tank (16) along the vertical direction.
2. The experimental device for simulating the water seal effect of the water curtain under different engineering geological conditions is characterized in that at least three water taps (8) are arranged, and the water taps (8) are arranged on the same vertical line.
3. The experimental device for simulating the water sealing effect of the water curtain under different engineering geological conditions is characterized in that a water collecting ditch (19) is arranged at the bottom of the cavern (10), the water collecting ditch (19) is communicated with a drain pipe (11), and a flowmeter (12) is arranged on the drain pipe (11); the bottom surface of the cavern (10) is provided with a slope, and the joint of the water collecting ditch (19) and the water drainage pipe (11) is the lowest part of the slope.
4. The experimental device for simulating the water-curtain water-sealing effect under different engineering geological conditions according to claim 1, characterized in that the water supply device comprises a water collection tank (5) and a water guide pipe (6), a plurality of water outlets are formed in the bottom of the water collection tank (5), one end of the water guide pipe (6) is connected with the water outlets, the other end of the water guide pipe is connected with the water inlet of the water-curtain pipeline (7), and a valve is arranged on the water guide pipe (6).
5. The experimental device for simulating the water seal effect of the water curtain under different engineering geological conditions as claimed in claim 1, wherein the water supply device further comprises a support (1) and a support base (3), the support (1) is arranged on the support base (3), a sliding block is arranged on the support (1), and the water collection tank (5) is connected with the sliding block.
6. The experimental device for simulating the water sealing effect of the water curtain under different engineering geological conditions as recited in claim 1, wherein the side surface of the water tank (16) is of a double-layer design, the inner layer is of a water permeable structure, and the outer layer is of a waterproof structure.
7. The experimental facility for simulating water seal effect of water curtain under different engineering geological conditions as recited in claim 1, wherein the water curtain pipeline is arranged as horizontal water curtain pipeline, vertical water curtain pipeline, inclined water curtain pipeline or combination of two of them.
8. The experimental facility for simulating the water seal effect of the water curtain under different engineering geological conditions is characterized in that the water curtain pipelines (7) are uniformly arranged around the chamber (10).
9. An experimental method for judging water curtain water seal effects under different engineering geological conditions is characterized by comprising the following steps:
step 1, configuring geological layer materials meeting similar conditions by combining physical and mechanical parameters of surrounding rocks of an actual cavern;
step 2, arranging a cavern (10) and a water curtain pipeline (7) in the stratum model, connecting the water curtain pipeline (7) with a water supply device, paving the geological layer material configured in the step 1 in a layered manner, manually tamping and vibrating to form a geological layer model, and simultaneously burying an optical fiber sensor (9) around the cavern and connecting a flowmeter (12) to obtain the stratum model;
step 3, supplying water to the stratum model obtained in the step 2, and acquiring osmotic pressure, water inflow, flow velocity and stress strain data;
step 4, changing the height of the water supply device, repeating the step 3, and obtaining the osmotic pressure, the water inflow, the flow rate and the stress strain data under different water head heights;
step 5, controlling the opening/closing of a valve between the water supply device and the water curtain pipeline (7), changing the distance between water curtain distribution holes, changing the combination form of different water curtain holes, repeating the step 3, and acquiring osmotic pressure, water inflow, flow rate and stress strain data under different water curtain pipeline distributions;
and 6, carrying out comparative analysis on the osmotic pressure, the water inflow amount, the flow rate and the stress strain acquired in the steps 4 and 5, and comparing the water sealing effects under different water curtain schemes.
10. The experimental method for evaluating the water seal effect of the water curtain under different engineering geological conditions as claimed in claim 9, characterized in that the state of the groundwater in the stratum model is changed by changing the opening degree of the faucet (8), so that the formation of the data of the osmotic pressure, the water inflow, the flow velocity and the stress strain under the condition of the height of the groundwater in different places is obtained in the stratum model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911203764.XA CN110806304A (en) | 2019-11-29 | 2019-11-29 | Experimental device and method for simulating water curtain water seal effects under different engineering geological conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911203764.XA CN110806304A (en) | 2019-11-29 | 2019-11-29 | Experimental device and method for simulating water curtain water seal effects under different engineering geological conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110806304A true CN110806304A (en) | 2020-02-18 |
Family
ID=69492259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911203764.XA Pending CN110806304A (en) | 2019-11-29 | 2019-11-29 | Experimental device and method for simulating water curtain water seal effects under different engineering geological conditions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110806304A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419943A (en) * | 2023-12-19 | 2024-01-19 | 武汉理工大学三亚科教创新园 | Ocean underground space model test device and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101529098B1 (en) * | 2014-02-19 | 2015-06-16 | 한국건설기술연구원 | Test apparatus for shield tunnel mock-up considering both underground earth pressure and pore water pressure according to draining condition, and method for the same |
| CN107941544A (en) * | 2017-12-07 | 2018-04-20 | 山东大学 | A kind of experimental rig and method of simulated groundwater oil sealing storehouse oil storage principle |
| CN108169419A (en) * | 2017-12-15 | 2018-06-15 | 浙江海洋大学 | It is a kind of to test device and the experimental method that water seal cave depot reinjected water influences cave depot |
| CN108222904A (en) * | 2017-12-12 | 2018-06-29 | 浙江海洋大学 | A kind of device of Large Underground water seal pit hole library water curtain water charging system three-dimensional physical model |
| CN108343470A (en) * | 2018-01-09 | 2018-07-31 | 中石化上海工程有限公司 | A kind of nature moisturizing method of underground water seal cave depot water curtain system |
| CN109342093A (en) * | 2018-09-05 | 2019-02-15 | 中国地质大学（北京） | A kind of underground water-seal oil depot country rock dominant flowing path discrimination method |
| CN210893616U (en) * | 2019-11-29 | 2020-06-30 | 中国电力工程顾问集团西北电力设计院有限公司 | Experimental device for simulating water curtain water seal effect under different engineering geological conditions |
-
2019
- 2019-11-29 CN CN201911203764.XA patent/CN110806304A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101529098B1 (en) * | 2014-02-19 | 2015-06-16 | 한국건설기술연구원 | Test apparatus for shield tunnel mock-up considering both underground earth pressure and pore water pressure according to draining condition, and method for the same |
| CN107941544A (en) * | 2017-12-07 | 2018-04-20 | 山东大学 | A kind of experimental rig and method of simulated groundwater oil sealing storehouse oil storage principle |
| CN108222904A (en) * | 2017-12-12 | 2018-06-29 | 浙江海洋大学 | A kind of device of Large Underground water seal pit hole library water curtain water charging system three-dimensional physical model |
| CN108169419A (en) * | 2017-12-15 | 2018-06-15 | 浙江海洋大学 | It is a kind of to test device and the experimental method that water seal cave depot reinjected water influences cave depot |
| CN108343470A (en) * | 2018-01-09 | 2018-07-31 | 中石化上海工程有限公司 | A kind of nature moisturizing method of underground water seal cave depot water curtain system |
| CN109342093A (en) * | 2018-09-05 | 2019-02-15 | 中国地质大学（北京） | A kind of underground water-seal oil depot country rock dominant flowing path discrimination method |
| CN210893616U (en) * | 2019-11-29 | 2020-06-30 | 中国电力工程顾问集团西北电力设计院有限公司 | Experimental device for simulating water curtain water seal effect under different engineering geological conditions |
Non-Patent Citations (1)
| Title |
|---|
| 王永强;文富勇;: "地下水封储油洞库工程安全监测设计", 人民长江, no. 19, 14 October 2013 (2013-10-14) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419943A (en) * | 2023-12-19 | 2024-01-19 | 武汉理工大学三亚科教创新园 | Ocean underground space model test device and method |
| CN117419943B (en) * | 2023-12-19 | 2024-04-05 | 武汉理工大学三亚科教创新园 | Ocean underground space model test device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108222082B (en) | Dynamic precipitation indoor model test method and device for foundation pit under condition of multiple aquifers | |
| CN211085660U (en) | Karst area subway anti-floating simulation device | |
| CN111103418B (en) | Simulation test system and test method for ground settlement caused by extraction of confined water | |
| CN204125898U (en) | The experimental rig of Dam Foundation Seepage under a kind of failure under earthquake action | |
| CN207760898U (en) | Foundation pit dynamic precipitation indoor model test device under the conditions of multi-aquifer | |
| CN101831924B (en) | Simulator for blocking groundwater seepage by underground structure | |
| CN106702952A (en) | Test device and method for simulating seepage condition of landslide of earth-rock dam | |
| CN105786032B (en) | A kind of trial zone level of ground water accuracy-control system and method | |
| CN205426725U (en) | Slant seepage flow for masterpiece low tube emerge in large numbers like analogue means | |
| CN111337650A (en) | Multifunctional test device for researching underground engineering soil body seepage failure mechanism | |
| CN206470116U (en) | A kind of experimental rig for simulating the lower basement bottom board stress of artesian water effect | |
| CN106706416A (en) | Test device capable of simulating basement bottom plate stress under effect of pressure water and use method thereof | |
| CN109374508A (en) | A kind of tailing row's infiltration system silting imitative experimental appliance and experimental method | |
| CN109853646A (en) | Indoor simulation test device and method for confined water precipitation of foundation pit | |
| CN104897877A (en) | Indoor reinjection model test system simulating confined water stratum and control method of indoor reinjection model test system | |
| CN103389260A (en) | Laboratory simulation test method for researching underground water seepage obstruction caused by pile foundation | |
| CN104318843B (en) | Artesian well water injection test device | |
| CN204758591U (en) | Indoor model test system of recharging on simulation pressure -bearing irrigated land layer | |
| CN210893616U (en) | Experimental device for simulating water curtain water seal effect under different engineering geological conditions | |
| CN209342336U (en) | It is a kind of for simulating the experiment casing of underground engineering anti-floating | |
| CN110806304A (en) | Experimental device and method for simulating water curtain water seal effects under different engineering geological conditions | |
| CN112539063B (en) | Three-dimensional simulation device for dynamic evolution of underground water under coastal coal mining condition | |
| CN206385495U (en) | A kind of earth and rockfill dam landslide observed seepage behavior simulation test device | |
| CN206725404U (en) | A kind of multi-functional column simulation integrating device for continuous monitoring | |
| CN105259330B (en) | A kind of indoor experimental apparatus and use the method that this device carries out profile control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |