CN210893616U - Experimental device for simulating water curtain water seal effect under different engineering geological conditions - Google Patents
Experimental device for simulating water curtain water seal effect under different engineering geological conditions Download PDFInfo
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- CN210893616U CN210893616U CN201922106683.XU CN201922106683U CN210893616U CN 210893616 U CN210893616 U CN 210893616U CN 201922106683 U CN201922106683 U CN 201922106683U CN 210893616 U CN210893616 U CN 210893616U
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Abstract
The utility model discloses an experimental device for simulating water curtain water seal effects under different engineering geological conditions, which comprises a geological layer model, a water supply device and a data acquisition device, wherein the geological layer model comprises a water tank, the bottom in the water tank is provided with a chamber and a groundwater simulation device, simulated geological layer materials are filled in the water tank, the geological layer materials and the materials of a simulation object meet similar conditions, the groundwater simulation device comprises a water curtain pipeline, and the water curtain pipeline is arranged around the chamber; the hole of permeating water has been seted up on the water curtain pipeline, and water curtain pipeline water inlet intercommunication water supply installation sets up the bottom of valve hole room between water supply installation and the water curtain pipeline entry and is provided with waterproof layer and drainage structure, drainage structure's export sets up the flowmeter, and distributed optical fiber sensor, stress strain transducer and flowmeter all connect the data acquisition center, the utility model discloses have fine operability and repeatability, carry out analogue test and can provide more nearly true data for water curtain water seal effect under the different geological conditions of analysis.
Description
Technical Field
The utility model belongs to the technical field of underground cavern oil storage, concretely relates to experimental apparatus of different engineering geological conditions water curtain water seal effect of simulation.
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.
Some research institutions or production units may have carried out relevant field test now, but do not have any institution or individual to propose an experimental apparatus for judging and optimizing water curtain water seal effect under different engineering geological conditions, the utility model discloses a provide and have important theoretical and practical meaning to secret water seal oil depot water curtain optimal design.
SUMMERY OF THE UTILITY MODEL
For solving the not enough in the prior art, the utility model provides a simulation different engineering geological conditions water curtain water seal effect's experimental apparatus simulates the relative position relation in secret water seal oil depot, restores engineering geology, hydrogeological environment of underground cavern, and better simulation underground oil storage cavern is at the operation in-process, and whether the water curtain can satisfy required water seal condition, arranges for further optimizing the water curtain, improves the water seal effect and provides the guidance.
In order to achieve the above purpose, the utility model 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.
Compared with the prior art, the utility model discloses following beneficial effect has: the device of the utility model can be used for simulating the water seal effect in different stratum models, and can collect osmotic pressure, water inflow, flow velocity and stress strain data according to different simulation conditions, the data can be used for analyzing and comparing the interaction between the actual groundwater cavern, water curtain, groundwater and surrounding rock environment of the water seal effect under different water curtain schemes, help considering the effect that groundwater and water curtain system play in the normal operation process of the underground water seal oil depot more comprehensively, the device accords with similar theory with the actual engineering, is representative to the actual engineering, and has strong pertinence and can be close to the actual situation; 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 utility model discloses reach different water curtain spatial distribution circumstances under the different geological conditions of simulation, the utility model discloses only need to change similar material ratio in the stratum model, change groundwater analogue means water level, change the control switch of aqueduct among the water curtain hole model water supply installation can simulate multiple different operating modes, have fine 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.
Drawings
FIG. 1 is a front view of the main body model of the present invention;
FIG. 2 is a plan view of the water curtain hole model of the present invention;
FIG. 3 is a front view of the water curtain hole model of the present invention;
FIG. 4 is a schematic view of the water supply device for water curtain hole model of the present invention;
FIG. 5 is a schematic view of the junction between the bottom of the water supply device and the water conduit of the water curtain hole model of the present invention;
fig. 6 is a schematic view of a part of fig. 1 enlarged at I, i.e. a schematic view of the water guiding pipe of the present invention;
FIG. 7 is a schematic view of the groundwater simulation device of the present invention;
fig. 8 is a schematic view of a part of fig. 1 enlarged at II, namely a schematic view of the water curtain pipeline of the present invention;
FIG. 9 is a schematic view of the water collecting hole inside the cavity model of the present invention;
FIG. 10 is a front view of the chamber 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 present invention will be described in detail with reference to the following embodiments and 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.
A use method of a device 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 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 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.
Example 1:
in order to make the technical solution and advantages of the present invention more clear, the present invention will be described in further detail 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 thereto, and a person skilled in the art can make various modifications and decorations without departing from the principle 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 the utility model discloses main part model elevation, model are as the stratum model by the similar material in stratum, and groundwater analogue means simulation is different groundwater heads, judges whether need arranging of water curtain hole, and porous copper pipe is as the water curtain hole, provides stable flood peak for the water curtain hole through top water curtain hole model water supply installation, and the water curtain utilizes data acquisition device to the supply effect of hole room in the simulation actual engineering, carries out data acquisition.
Fig. 2 and fig. 3 are a front view and a top view of the water curtain hole model 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 the utility model discloses water curtain hole model water supply installation bottom and aqueduct junction schematic diagram, fig. 6 are the utility model discloses the aqueduct schematic diagram, the uncovered bottom round hole of bottom rubber buffer 15 seal for connect the water curtain hole, during the aqueduct 6 other end twisted the water curtain hole with the screw thread 21 form, valve 20 can control the switching of aqueduct. Thereby adjusting the spatial position relationship of the water curtain holes.
Fig. 7 is the schematic diagram of the utility model of an underground water simulator, the width between the two layers of side plates in the water tank is 5cm, the inner layer glass plate is permeable glass 17, the water storage height is controlled by a water tap 8, different natural underground water levels are controlled by three drainage water taps 8 with different heights, h1 is 30cm, h2 is 37cm, h3 is 60cm, and the necessity of water curtain setting is verified by considering whether the different underground water levels can form natural water seal conditions, so as to optimize the water curtain setting;
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 the utility model discloses water curtain model schematic diagram, fig. 9 is the utility model discloses the inside schematic diagram that catchments of hole model, the utility model discloses water curtain pipeline 7 has the hole 18 of permeating water along the pipe wall range for provide water pressure and get into hole country rock, the aperture is evenly arranged, arranges and see fig. 2 and 3.
Fig. 10 is the utility model discloses cavern model elevation view, cavern model 10 form for porous material is prefabricated, and the cavern is the shape of a hoof, and the cavern is wide 10cm, and long 30cm, high 15cm, cavern intensity are big, non-deformable, and the cavern floor is provided with the waterproof layer, and is waterproof, and the central axis department sets up concave shape catch basin 19, is convenient for seep water and collects, sees fig. 9.
Example 2
The device of the utility model is used for an experimental device for researching the feasibility of island oil storage, saline water is filled in a groundwater simulation device, the corrosion of seawater to an underground storage (island oil storage) can be simulated, then a salinity meter is arranged at a drain pipe 11 to monitor the salinity of the reservoir, the salinity meter is connected with a data acquisition center, other monitoring means can be arranged to monitor the migration path of seawater when similar materials at the periphery of a cavern are buried, and the blocking effect of a water curtain on 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 utility model provides an experimental apparatus for be used for judging and optimize water curtain water seal effect 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 utility model discloses the necessity that the device can evaluate the water curtain hole and set up quantifies the relation between water curtain spatial arrangement and the hole room water seal effect, provides the guidance for water curtain optimal design. The utility model discloses the device only needs to change similar material kind and similar ratio according to the engineering geological conditions of the secret water seal storehouse of difference, changes device "opening", "switch", can adjust various different secret water seal hole storehouse engineering geological conditions, water curtain supply form, has fine repeatability.
The above description is provided for the purpose of illustrating the present invention in more detail with reference to specific preferred embodiments, and it is not to be construed as limiting the present invention, and it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (8)
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).
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| CN110806304A (en) * | 2019-11-29 | 2020-02-18 | 中国电力工程顾问集团西北电力设计院有限公司 | Experimental device and method for simulating water curtain water seal effects under different engineering geological conditions |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110806304A (en) * | 2019-11-29 | 2020-02-18 | 中国电力工程顾问集团西北电力设计院有限公司 | Experimental device and method for simulating water curtain water seal effects under different engineering geological conditions |
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