CN104897877A - Indoor reinjection model test system simulating confined water stratum and control method of indoor reinjection model test system - Google Patents
Indoor reinjection model test system simulating confined water stratum and control method of indoor reinjection model test system Download PDFInfo
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Abstract
The invention provides an indoor reinjection model test system simulating a confined water stratum and a control method of the indoor reinjection model test system. The test system comprises a test system, and is characterized by comprising a model box, a reinjection pipeline and a water pump, wherein a soil layer comprising a sandy cobble confined water layer is formed in the model box according to engineering geology situation; pressure-bearing layer water delivery pipes connected with the confined water layer and used for providing confined water pressure are arranged on the side wall of the model box; a reinjection well connected with the reinjection pipeline is arranged in the soil layer; the reinjection pipeline is connected with the water pump through a water collection tank; the water pump is used for injecting water into the reinjection well to realize reinjection simulation of the confined water stratum. Through the adoption of the indoor reinjection model test system, two reinjection modes, namely constant-pressure reinjection and constant-flow reinjection, can be simulated, and an optimal reinjection manner can be selected through comparison conveniently by adopting tests, so that the shortening of the construction period and the reduction of the cost are facilitated; and in addition, parameters obtained through tests can provide prospective technical bases for implementation of actual projects.
Description
Technical field
The present invention relates to indoor and recharge model system, particularly model assay systems and control method thereof are recharged in a kind of indoor of simulating piestic water stratum.
Background technology
Recharge control groundwater level, or prevent the effective measures because engineering dewatering causes land subsidence, underground water is wasted.And due to engineering geological condition totally different, reasonably select recycling mode, effectively estimate the effect of recharging and become one of problem demanding prompt solution instantly.On-the-spot Returning test of long duration, costly.Therefore to be necessary in laboratory the mode of recharging and to recharge effect research, showing that key parameter is to instruct practical application.
The pore water pressure on ground settlement and uplift capacity, stratum, the coverage of recharging water filling recharge reference index important in design, in order to obtain these achievement datas, on-the-spotly needs the test carrying out local.But site test often has destructiveness, once in-situ test is implemented, this recharges region near hole just not resilient, also cannot reuse.In some cases, the regional environment of intending recharging is complicated, and the condition of carrying out local test is limited.In addition also there is following weak point in site test: the measuring pore water pressure of (1) depths, stratum is more difficult; (2) due to the complicacy of site environment, the coverage of recharging water filling should not measure.In addition, in laboratory, the region of intending recharging is simulated, draw key parameter and then instruct practical operation more to seem particularly important.But there is following shortcoming in current model test:
1, the situation of determining head boundary when model test cannot simulate actual recharging;
The situation on constant flow border when 2, model test cannot simulate actual recharging;
3, the situation that level pressure when model test cannot simulate actual recharging is recharged;
4, model test cannot simulate the situation of artesian aquifer.
Current model test, owing to there is above-mentioned deficiency, is therefore often difficult to reflect the truth of recharging, and also cannot provide guidance for the selection of recycling mode.
Summary of the invention
For solving prior art above shortcomings, the invention provides a kind of indoor of simulating piestic water stratum and recharging model assay systems and control method thereof.
For achieving the above object, the present invention adopts following technical scheme:
Model assay systems is recharged in the indoor on simulation piestic water stratum, comprises model casing, recharges pipeline and water pump; Comprise the soil layer of sandy gravel artesian aquifer in described model casing according to engineering geological condition preparation, the sidewall of described model casing is provided with the bearing course water-supply-pipe in order to provide artesian pressure connecting artesian aquifer; Be provided with in described soil layer to connect and recharge the inverted well of pipeline, described in recharge pipeline and be connected with water pump by header tank; Described water pump by pouring water in inverted well, realizes recharging simulation to piestic water stratum.
Described water pump is variable frequency pump, and described variable frequency pump is connected with the described pipeline that recharges by control enclosure; Described variable frequency pump, by the steering order adjusting rotary speed of control enclosure, exports specified pressure water.
Described indoor are recharged model assay systems and are also comprised supervisory control desk, the described pipeline that recharges is provided with the pressure transducer, flow sensor and the flow control valve that carry out information interaction with supervisory control desk, described control system is according to obtained above-mentioned feedback information, send instruction to control enclosure and flow control valve, control the current of variable frequency pump delivered constant pressure or flow.
Described artesian aquifer is two-layer, and the opening of described bearing course water-supply-pipe is higher than described artesian aquifer setting height; Described bearing course water-supply-pipe is provided with scale, valve and sensor.
The sidewall of described model casing is provided with the bearing course drinking-water pipe in order to control to recharge constant flow border connecting artesian aquifer, and described bearing course drinking-water pipe is provided with level control valve.
The lower end of described inverted well is positioned at described artesian aquifer place.
The sidewall of described model casing is provided with the surface layer water-supply-pipe in order to provide insulated stream connecting veneer of soil.
Described header tank is enclosure-type header tank.
The top of described inverted well is provided with and the described end cap recharging pipeline sealing and contact, and described end cap is provided with aspirating hole.
The soil layer of described model casing is inner, apart from described inverted well diverse location, different depth place, is provided with some hole pressure meters in order to measure pore water pressure.
The soil layer of described model casing is inner, apart from described inverted well diverse location place, is provided with water-level observation meter.
The soil body surface of described model casing, is provided with one or several displacement meters.
The control method of model assay systems is recharged in the indoor on simulation piestic water stratum, comprises the following steps:
Step 1: pressure is recharged in supervisory control desk setting, and set data-signal is sent to control enclosure, described control enclosure controls variable frequency pump carries set pressure in inverted well current by recharging pipeline;
Step 2: be located at the pressure transducer recharged on pipeline and measured force value is transferred to supervisory control desk;
Step 3: described supervisory control desk, according to received force value, determines pressure adjustment signal, and pressure adjustment signal is sent to control enclosure;
Step 4: described control enclosure, according to received pressure adjustment signal, controls the current of variable frequency pump to delivered constant pressure in header tank.
Described supervisory control desk is connected with described control enclosure and described pressure transducer by wireless network.
The control method of model assay systems is recharged in the indoor on simulation piestic water stratum, comprises the following steps:
Step 1: flow value is recharged in supervisory control desk setting, and set data-signal is sent to control enclosure, described control enclosure controls variable frequency pump carries set flow in inverted well current by recharging pipeline;
Step 2: be located at the flow sensor recharged on pipeline and measured flow value is transferred to supervisory control desk;
Step 3: described supervisory control desk, according to received flow value, determines flow regulating signal, and flow regulating signal is transferred to flow control valve;
Step 4: described flow control valve carrys out adjust flux according to received flow regulating signal, controls the current exporting constant rate.
Described supervisory control desk is connected with described control enclosure and described flow control valve by wireless network.
The test method of model assay systems is recharged in the indoor on simulation piestic water stratum, comprises the following steps:
Step 1: according to Practical Project geological state, the soil layer of the actual hydrogeological condition of preparation simulation in model casing;
Step 2: carry out constant-pressure respectively and recharge and recharge simulation with constant flow, obtain the actual measurement index of above-mentioned two kinds of recycling modes;
Step 3: be analyzed for obtained actual measurement index, determines actual recycling mode.
Wherein, in step 1, by controlling the height of water level in piestic water water-supply-pipe, the head height of simulation piestic water.
In step 1, by controlling the height of water level in surface layer water-supply-pipe, the head height on top layer in analog.
In step 2, variable frequency pump, by the steering order of control enclosure, exports the current of specified pressure, to realize the simulation that constant-pressure recharges.
In step 2, supervisory control desk control flow check adjustable valve, exports the current of constant rate, to realize the simulation that constant flow recharges.
In step 2, the water yield flowed out by controlling drinking-water pipe simulates the constant flow border in actual soil layer.
In step 2, the hole pressure meter at diverse location place is utilized to obtain the pore water pressure force value of each position; The water-level observation meter at diverse location place is utilized to obtain the SEA LEVEL VARIATION value of diverse location place soil layer; The displacement meter being positioned at soil body surface diverse location place is utilized to obtain the shift value of the soil body.
In step 3, the water level conditions of pore water pressure force value, solum settlement amount and each soil layer of being surveyed by Comprehensive Correlation two kinds of recycling modes, is instructed the actual amount of recharging of recharging and recharges pressure, determines actual recycling mode.
Beneficial effect of the present invention is:
The soil layer of preparation model engineering geological sites situation does Returning test, and the specific aim of geologic condition is stronger, and the result drawn by test simulation is closer to engineering practice, and the key parameter drawn can the directly guide field practical operation of recharging; And avoid the destruction of site test to place.Set bearing course water-supply-pipe solves the technical barrier that bearing course water pressure is not easily simulated.
Control enclosure is utilized to control the current of variable frequency pump output specified pressure, the simulation of level pressure Returning test can be realized, with solve the practical ways of engineering problem and more press close to, the experimental test index that the level pressure of gained is recharged and the correlation parameter that actual level pressure is recharged more close.
Two-layer artesian aquifer is set and can simulates more complicated soil layer.If only there is one deck artesian aquifer, the pressure-bearing water pipe of that second layer is closed.
The present invention can simulate level pressure recharge to recharge with constant flow in two kinds recharge pattern, can easily by testing than selecting best recycling mode, be conducive to saving duration, expense, and can by testing the parameter drawn, as: by the hole being embedded in different soil press measure measure interstitial hydraulic pressure, distance inverted well diverse location place displacement dosage solum settlement amount, the water level conditions etc. of soil layer that observed by the observation port of distance inverted well a distance measured, for Practical Project is implemented to provide prospective technical basis.
In model casing, soil layer is according to Practical Project geological condition proportions, recharges outer automatically the adjustment by level control valve of coverage and draws water, artesian aquifer water level is remained unchanged, better ensure that test simulation is more tending towards engineering reality.
Intelligentized control system makes Returning test process control more quick, efficient, reduces the test figure deviation because personal error causes, and it is more accurate to make by testing the technical conclusion drawn.
Accompanying drawing explanation
Fig. 1 is overall schematic of the present invention;
Fig. 2 is test method of the present invention and control flow chart;
In figure: 1, variable frequency pump, 2, control enclosure, 3, header tank, 4, model casing, 5, bearing course water-supply-pipe, 6, recharge pipeline, 7, flow control valve, 8, pressure transducer, 9, flow sensor, 10, inverted well, 11, end cap, 12, aspirating hole, 13, surface layer water-supply-pipe, 14, supervisory control desk, 15, valve switch, 16, level control valve, 17, bearing course drinking-water pipe, 18, hole pressure meter, 19, displacement meter, 20, water-level observation meter.
Embodiment
Below in conjunction with accompanying drawing and case study on implementation, the present invention is further described.
The indoor on simulation piestic water stratum are recharged model assay systems and are mainly comprised model casing 4, Returning test pipeline, pump and control system;
Described model casing 4 is the soil layer casees prepared in proportion according to engineering geological condition, and its tank wall has intake-outlet, and with valve, each inlet and outlet pipe can be communicated with it.
Described Returning test pipeline comprises bearing course water-supply-pipe 5, surface layer water-supply-pipe 13, bearing course drinking-water pipe 17, and each pipeline has corresponding valve, sensor.
Bearing course water-supply-pipe 5, for controlling the head height of artesian aquifer, if do not have piestic water in actual formation, then closes corresponding piestic water water pipe.Owing to all can have fluid-tight soil layer above piestic water, so regulate the head of pressure-bearing water pipe, i.e. the height of water level in piestic water water-supply-pipe, according to same depth, the principle that the pressure of water is equal, just can control the size of whole artesian aquifer.
The object of surface layer water-supply-pipe 13 is similar.
Bearing course drinking-water pipe 17: in order to simulate constant flow boundary condition, also be in actual soil layer, a certain boundary water is flowing, so will open lamination water drinking-water pipe (being perhaps called water-supply-pipe more suitable), the water yield flowed out by controlling drinking-water pipe simulates the constant flow border in actual soil layer.
Corresponding sensor is exactly the height etc. experiencing the output of flow, input value and head.
Described variable frequency pump 1 can pass through the steering order adjusting rotary speed of control enclosure 2, to export specified pressure water.
Described header tank 3 is enclosure-type, and two ends have titting water outlet, can with variable frequency pump 1, recharge pipeline 6 and be connected.
Described control system carries out information interaction by wireless network and control enclosure 2, flow control valve 7, pressure transducer 8, flow sensor 8, level control valve 16.
The test method that model is recharged in a kind of indoor of simulating sand-pebble layer comprises the following steps:
1, prepare before recharging experiment
According to geologic information, in model casing 4, prepare soil layer in proportion according to Practical Project geological condition.Excavate with spiral drill and settle inverted well 10, fixing end cap 11 at well end, pipe will be recharged and insert in inverted well 10, and by aspirating hole 12 by evacuating air in inverted well 10, prevent gas from blocking up, other install the equipment such as each pipeline, pump by Fig. 1.Open valve switch 15, inject tap water by bearing course water-supply-pipe 5 and surface layer water-supply-pipe 13 respectively to bearing course, surface layer, utilize the level scale line on tube wall, observe the head height injecting water, until reach test height, the valve switch 15 on blinding off a line.Above process simulates the piestic water state of recharging in front stratum, bottom piestic water pressure-bearing, and top diving has the water level of diving.
2, process of the test
1) level pressure is recharged
Variable frequency pump 1 one end access tap water, one end is connected with header tank 3.Pressure is recharged in supervisory control desk 14 setting, and by wireless network, data-signal is sent to control enclosure 2, and control enclosure 2 controls the current of variable frequency pump 1 to delivered constant pressure in header tank 3, and recharges in inverted well 10 by recharging pipeline 6.Meanwhile, pressure transducer 8 Real-Time Monitoring recharge water flowing pressure, and send feedback signal to control desk 14, to pressure fine setting, to ensure that constant voltage is recharged.
2) constant flow recharges
Tap water is evacuated to header tank 3 and lays in by variable frequency pump 1, flow value is recharged in supervisory control desk 14 setting, and by wireless network, data-signal is sent to flow control valve 7, the aperture of operation valve, to ensure that recharge water flows in inverted well 10 by recharging pipeline 6 by setting flow value.Meanwhile, traffic conditions in flow sensor 9 Real-Time Monitoring pipeline, and send feedback signal to control desk 14, to flow rate fine-tuning, to ensure that constant flow recharges.
3, the boundary condition recharged
For ensureing the effect reaching region Returning test, also namely the artesian aquifer constant level outside coverage is being recharged, and recharge flowing in current direction bearing course same level face in region, when above-mentioned two kinds of modes are recharged, if boundary condition is constant-pressure boundary, then control the height of bearing course water-supply-pipe 5, as constant flow border then equal by the amount opening the water yield that level control valve 16 makes to recharge and outflow.
4, the measurement of test index
In the process that level pressure is recharged or constant flow recharges, by the value that real time record is embedded in distance inverted well 10 diverse location place, meter 18 is pressed in the hole at different depth place, the variable effect of the pore water pressure recharged diverse location place can be drawn.The impact of the process of recharging on the SEA LEVEL VARIATION of diverse location place soil layer can be analyzed by the value of the water-level observation meter 20 reading diverse location place.By observing earth surface diverse location from the changing value of displacement meter 19, the impact of recharging surrounding enviroment can be analyzed, as to (early warning value of such as ground deformation) when surrounding building setting alarming value, the related pressure and flow parameter that recharge can be analyzed.Actual recharge effect by simulating, obtain as: pore water pressure, solum settlement amount, recharge the parameters such as water filling coverage, by the contrast to two kinds of recycling mode simulate effects, obtain instructing for the actual amount of recharging of recharging and recharge pressure.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (10)
1. model assay systems is recharged in the indoor of simulating piestic water stratum, it is characterized in that: comprise model casing, recharge pipeline and water pump; Comprise the soil layer of sandy gravel artesian aquifer in described model casing according to engineering geological condition preparation, the sidewall of described model casing is provided with the bearing course water-supply-pipe in order to provide artesian pressure connecting artesian aquifer; Be provided with in described soil layer to connect and recharge the inverted well of pipeline, described in recharge pipeline and be connected with water pump by header tank; Described water pump by pouring water in inverted well, realizes recharging simulation to piestic water stratum.
2. model assay systems is recharged in the indoor on simulation piestic water stratum according to claim 1, it is characterized in that: described water pump is variable frequency pump, and described variable frequency pump is connected with the described pipeline that recharges by control enclosure; Described variable frequency pump, by the steering order adjusting rotary speed of control enclosure, exports specified pressure water.
3. model assay systems is recharged in the indoor on simulation piestic water stratum according to claim 2, it is characterized in that: described indoor are recharged model assay systems and also comprised supervisory control desk, the described pipeline that recharges is provided with the pressure transducer, flow sensor and the flow control valve that carry out information interaction with supervisory control desk, described control system is according to obtained above-mentioned feedback information, send instruction to control enclosure and flow control valve, control the current of variable frequency pump delivered constant pressure or flow.
4. model assay systems is recharged in the indoor on simulation piestic water stratum according to claim 1, it is characterized in that: described artesian aquifer is two-layer, and the opening of described bearing course water-supply-pipe is higher than described artesian aquifer setting height; Described bearing course water-supply-pipe is provided with scale, valve and sensor; The sidewall of described model casing is provided with the bearing course drinking-water pipe in order to control to recharge constant flow border connecting artesian aquifer, and described bearing course drinking-water pipe is provided with level control valve; The lower end of described inverted well is positioned at described artesian aquifer place.
5. model assay systems is recharged in the indoor on simulation piestic water stratum according to claim 1, it is characterized in that: the sidewall of described model casing is provided with the surface layer water-supply-pipe in order to provide insulated stream connecting veneer of soil; Described header tank is enclosure-type header tank; The top of described inverted well is provided with and the described end cap recharging pipeline sealing and contact, and described end cap is provided with aspirating hole.
6. model assay systems is recharged in the indoor on simulation piestic water stratum according to claim 1, it is characterized in that: the soil layer of described model casing is inner, apart from described inverted well diverse location, different depth place, be provided with several in order to measure hole pressure meter and the water-level observation meter of pore water pressure; The soil body surface of described model casing, is provided with one or several displacement meters.
7. the control method of model assay systems is recharged in the indoor of simulating piestic water stratum, it is characterized in that, comprises the following steps:
Step 1: pressure is recharged in supervisory control desk setting, and set data-signal is sent to control enclosure, described control enclosure controls variable frequency pump carries set pressure in inverted well current by recharging pipeline;
Step 2: be located at the pressure transducer recharged on pipeline and measured force value is transferred to supervisory control desk;
Step 3: described supervisory control desk, according to received force value, determines pressure adjustment signal, and pressure adjustment signal is sent to control enclosure;
Step 4: described control enclosure, according to received pressure adjustment signal, controls the current of variable frequency pump to delivered constant pressure in header tank.
8. the control method of model assay systems is recharged in the indoor on simulation piestic water stratum according to claim 7, it is characterized in that: described supervisory control desk is connected with described control enclosure and described pressure transducer by wireless network.
9. the control method of model assay systems is recharged in the indoor of simulating piestic water stratum, it is characterized in that, comprises the following steps:
Step 1: flow value is recharged in supervisory control desk setting, and set data-signal is sent to control enclosure, described control enclosure controls variable frequency pump carries set flow in inverted well current by recharging pipeline;
Step 2: be located at the flow sensor recharged on pipeline and measured flow value is transferred to supervisory control desk;
Step 3: described supervisory control desk, according to received flow value, determines flow regulating signal, and flow regulating signal is transferred to flow control valve;
Step 4: described flow control valve carrys out adjust flux according to received flow regulating signal, controls the current exporting constant rate.
10. the control method of model assay systems is recharged in the indoor on simulation piestic water stratum according to claim 9, it is characterized in that: described supervisory control desk is connected with described control enclosure and described flow control valve by wireless network.
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| CN112834256A (en) * | 2021-01-07 | 2021-05-25 | 中国煤炭地质总局勘查研究总院 | Test device and test method for simulating mine water reinjection |
| CN114486683A (en) * | 2022-02-16 | 2022-05-13 | 上海工程技术大学 | Test device for simulating pumping in foundation pit and recharging underground water outside foundation pit |
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