CN108267563A - A kind of water supply installation and application method of large-scale three dimensional geologic model test - Google Patents
A kind of water supply installation and application method of large-scale three dimensional geologic model test Download PDFInfo
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- CN108267563A CN108267563A CN201810114891.1A CN201810114891A CN108267563A CN 108267563 A CN108267563 A CN 108267563A CN 201810114891 A CN201810114891 A CN 201810114891A CN 108267563 A CN108267563 A CN 108267563A
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Abstract
The present invention relates to a kind of water supply installation and application method of large-scale three dimensional geologic model test, the water supply installation of large-scale three dimensional geologic model test is mainly made of supporting rack, water tank, pumping water tank, water supply pipe, water level reader and immersible pump.The present invention can provide water source for large-scale geologic model test system, can really reflect practical seepage action of ground water situation, setting hydraulic pressure precision is high, and the authenticity of guarantee test result greatly improves working efficiency and result of the test accuracy.
Description
Technical field
The present invention relates to a kind of water supply installation applied in geologic model test and application methods, are particularly suitable for tunnel
The groundwater supply of three-dimensional geological hazard model experiment.
Background technology
At present, one of focus and emphasis is had become for behavior evolution process of the deep rock mass in digging process.Especially
Its when tunnels and underground engineering passes through solution cavity, tomography when unfavorable geologic bodies, due to unfavorable geologic body complexity structural ge nesis and
Occurrence condition, theoretical research and numerical simulation have the limitation of its own, and field test has greatly the acquisition of data
Difficult and serious threat testing crew personal safety.Geologic model test as a kind of important research means, can comprehensively,
Truly reflect the construction of the underground engineerings such as the spatial relationship of unfavorable geologic body and underground chamber, accurate simulation tunnel, tunnel
Journey has irreplaceable important function in terms of underground engineering disasters are solved the problems, such as.Rock And Soil meets water and disintegration, reduction occurs,
Self-stable ability is lost, leads to the generation of disaster, therefore, when carrying out geologic model test, the simulation of underground water is to result of the test
Accuracy play an important roll.But at present, for such water supply installation, there are certain shortcomings, cannot such as make water
Source is uniformly distributed, it is impossible to realize Water hydraulic static pressure loading etc..
Invention content
It is uniformly distributed the present invention provides a kind of achievable underground water, the water supply installation and method of changeable head height,
Geologic model test system for underground engineerings such as tunnel, tunnels provides water source.
To achieve the above object, the present invention uses following technical proposals：
A kind of water supply installation of large-scale three dimensional geologic model test, it is characterised in that：It is mainly by supporting rack, water supply water
Case, pumping water tank, water supply pipe, water level reader and immersible pump composition, the water tank are fixedly installed on supporting rack, institute
The height that the residing height of water tank is higher than model test frame is stated, the water tank has water injection hole and drain hole, the note
Water hole is connected by pump tubing length with the water outlet of immersible pump, the immersible pump be set to pumping water tank in and its water inlet with
Pumping water tank is connected, and the drain hole is arranged on water tank bottom and passes through control valve for controlling water and pressure
It is connect with one end of water supply pipe, the other end of the water supply pipe connects several pipe with small pipe diameter pipelines, the pipe with small pipe diameter pipeline
Between be arranged in parallel, the pipe with small pipe diameter pipeline is inserted among the filler inside model test frame, every pipe with small pipe diameter pipeline bottom
Portion is provided with seepage flow hole, and pipe with small pipe diameter pipeline has been externally wrapped with geotextiles.
On the basis of above-mentioned technical proposal, spout hole is additionally provided on the water tank, is equipped at the spout hole
Valve, after water level is more than spout hole height in water tank, water flows into lower part by spout hole, overflow pipe in water tank
Pump water tank.
On the basis of above-mentioned technical proposal, the water level reader is mainly by liquid level sensor and light beam water level display group
Into the liquid level sensor is placed in water tank and SEA LEVEL VARIATION situation is observed and water level information is reflected light in real time
On column display, thus for according to control head height.
On the basis of above-mentioned technical proposal, the bottom of every pipe with small pipe diameter pipeline is provided with two rows of seepage flow holes, two rows of seepage flow holes
It is staggered.
A kind of application method of the water supply installation of large size geologic model test, which is characterized in that include the following steps：
1) it is used to place water tank higher than the steel support frame of model test frame in outdoor setting；
2) it in the pumping water tank for having at water source setting that can lay in certain moisture storage capacity, stores up and immersible pump is placed in pumping after full water
Water is pumped in water tank by water tank bottom；
3) water tank is placed in steel support frame, overflow pipe and valve, water is set to lead at water tank certain altitude
It crosses water injection hole and enters water tank, when experiment, which opens valve, makes water level in water tank remain at certain altitude, works as water
Water is discharged by overflow pipe when water level is higher than preset height in case；
4) water supply pipe one end connection water tank drain hole, the other end are divided into several minor diameter pipelines and enter model test
Inside frame, every minor diameter the bottom of the pipeline is provided with two rows of seepage flow holes being laid staggeredly, and geotextiles are wound on the outside of minor diameter pipeline,
Minor diameter line upper portion is laid with bentonite；
5) when carrying out model test, the control valve at water tank drain hole is opened, liquid level sensor is placed in water supply
Water tank bottom by observing the reading of light beam water level display, adjusts water level in real time.
On the basis of above-mentioned technical proposal, water tank and supporting rack height are determined according to the flow that experimental design requires,
Determine formula such as (1)：
H=S0lQ2 (1)
Wherein,Also can table look-up acquisition；S0Pipeline resistivity, l- length of pipe, Q- flows, d- pipeline diameters,
λ-pipeline frictional resistant coefficient.
On the basis of above-mentioned technical proposal, water tank capacity is determined with formula (2)
Q'=Vn α (1+ β) (2)
Wherein, moisture storage capacity required for Q'-, V- stratum filtration volumes, n- formation pore rates, α-groundwater recharge rate, β-ground
Lower water infiltration loss rate；
Determine experiment the porosity n of filler, the volume V for needing seepage action of ground water stratum, groundwater recharge rate α and
After seepage action of ground water loss late β, each parameter is substituted into formula (2) and obtains meeting the required moisture storage capacity of test requirements document.
On the basis of above-mentioned technical proposal, the water supply pipe diameter determines：Pipeline resistivity S in formula (1)0By looking into
It, can be by formula after table method determinesPipeline diameter d is obtained, after pipeline diameter determines, water supply pipe is let out from water tank
Water hole position is to model test top of the trellis, and with single pvc pipe, length of pipe is true to model test frame distance according to water tank
It is fixed；Into after model test frame inside, water supply pipe can be divided into more pvc pipe roads laterally or vertically, laterally every during setting
The bottom of the pipeline is with the two rows of seepage flow holes of staggered setting, and every pipeline outside winding geotextiles, line upper portion is laid with certain thickness
Bentonite；For every pipeline surrounding with the staggered multiple rows of seepage flow hole of setting, pipeline winds geotextiles outside when vertically arranged.
Compared with oneself has technology, the present invention has the following advantages：It applies in large-scale three dimensional geologic model test system, especially
Its influence of Study of The Underground water to unfavorable geologic body is especially suitable, and the present apparatus can realize that underground water uniformly divides during experiment
Cloth, changeable head height, have preferable leakproofness, can withstand up to the hydraulic pressure of 2Mpa, and can be continual and steady confession
Water.
Description of the drawings
The overall schematic of Fig. 1 present invention；
Fig. 2 model test top of the trellis pipeline distribution plane figures of the present invention；
The cross-sectional view of Fig. 3 water tanks of the present invention；
The fragmentary bottom structure diagram of pipe with small pipe diameter pipeline inside Fig. 4 model test framves of the present invention；
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
But the present invention is not limited to following specific embodiments, all any changes or modifications done based on the present invention belong to this
The claimed range of invention.
As shown in Figures 1 to 4, a kind of water supply installation of large-scale three dimensional geologic model test, it is characterised in that：Its mainly by
Supporting rack 1, water tank 2, pumping water tank 3, water supply pipe 4, water level reader and immersible pump 6 form, and the water tank 2 is solid
Loaded on supporting rack 1, the residing height of the water tank 2 is higher than the height of model test frame 8 for Dingan County, and the water tank 2 has
There are water injection hole 20 and drain hole 21, the water injection hole 20 is connected by pump tubing length 7 with the water outlet of immersible pump 6, described latent
Water pump 6 is set in pumping water tank 3 and its water inlet is connected with pumping water tank 3, and the drain hole 21 is arranged on water tank 2
Bottom simultaneously passes through for the control valve 50 of water and pressure to be controlled to be connect with one end of water supply pipe 4, the water supply pipe 4
The other end connects several pipe with small pipe diameter pipelines 40, is arranged in parallel between the pipe with small pipe diameter pipeline 40, and the pipe with small pipe diameter pipeline 40 is inserted
Among entering the filler inside model test frame, every 40 bottom of pipe with small pipe diameter pipeline is provided with seepage flow hole 41, pipe with small pipe diameter pipeline
Geotextiles have been externally wrapped with, have made flow under pressure only to lower part model test filler seepage flow, geotextiles cause water
It can ooze out, while pipe with small pipe diameter pipeline 40 had both been protected in turn avoid soil by being blocked in the entrance pipe with small pipe diameter pipeline of seepage flow hole 41 40
Pipe with small pipe diameter pipeline 40.
Preferably, spout hole 22 is additionally provided on the water tank 2, valve is installed at the spout hole 22, works as confession
After water level is more than spout hole height in water tank 2, water flows into the pumping water of lower part by spout hole, overflow pipe in water tank 2
Case 3.
Preferably, the water level reader is mainly made of liquid level sensor 30 and light beam water level display 31, the liquid
Level sensor 30 is placed in water tank 2 and SEA LEVEL VARIATION situation is observed and water level information is reflected Bar graphic display in real time
On device, thus for according to control head height.
Further, the bottom of every pipe with small pipe diameter pipeline 40 is provided with two rows of seepage flow holes 41, and two rows of seepage flow holes 41 are staggered.
Preferably, in 8 top-loaded sealing plate 100 of model test frame.
A kind of application method of the water supply installation of large-scale three dimensional geologic model test, includes the following steps：
1) it is used for placing water tank in the steel support frame of a height of 6.5m of outdoor setting；
2) there is setting at water source that can lay in 4m3The pumping water tank of moisture storage capacity will have 0.75Mpa pressure after storing up full water
Immersible pump be placed in pumping water tank bottom, water is pumped in water tank；
3) water tank is placed in steel support frame, and water tank capacity is 12m3, size is long * wide * high=3m*2m*
2m, sets overflow pipe and valve at water tank 1.5m height, and water enters water tank by water injection hole, and when experiment opens valve
Door water level in water tank is made to remain at 1.5m height, when in water tank water level be higher than 1.5m when water pass through overflow pipe
It is discharged；
4) water supply pipe one end connection water tank drain hole, the single-pipeline of water supply pipe diameter 200mm, material are
PVC, this section of pipeline are about 20m, and the minor diameter pipeline that the other end is divided into two a diameter of 100mm, material is PVC enters model examination
It tests inside frame, two minor diameter pipelines are mutually parallel, and distance is 1m, and every minor diameter the bottom of the pipeline is provided with two rows and is laid staggeredly
A diameter of 20mm seepage flow hole, distance is 5cm between seepage flow hole, winding geotextiles on the outside of minor diameter pipeline, minor diameter pipeline
Top is laid with the bentonite of 50cm thickness；
5) when carrying out model test, the control valve at water tank drain hole is opened, liquid level sensor is placed in water supply
Water tank bottom by observing the reading of light beam water level display, adjusts water level in real time.If the it is to be noted that height of water tank
Degree, water tank capacity and the unreasonable of water supply pipe diameter setting will all seriously affect last analog result, water tank
The setting of height, water tank capacity and water supply pipe diameter these parameters need to cooperate, could real simulation underground
The situation of water.
Preferably, the flow required according to experimental design determines water tank and supporting rack height, determines formula such as (1)：
H=S0lQ2 (1)
Wherein,Also can table look-up acquisition；S0Pipeline resistivity, l- length of pipe, Q- flows, d- pipeline diameters,
λ-pipeline frictional resistant coefficient.
Preferably, water tank capacity is determined with formula (2)
Q'=Vn α (1+ β) (2)
Wherein, moisture storage capacity required for Q'-, V- stratum filtration volumes, n- formation pore rates, α-groundwater recharge rate, β-ground
Lower water infiltration loss rate；
Determine experiment the porosity n of filler, the volume V for needing seepage action of ground water stratum, groundwater recharge rate α and
After seepage action of ground water loss late β, each parameter is substituted into formula (2) and obtains meeting the required moisture storage capacity of test requirements document.
Preferably, the water supply pipe diameter is determining：Pipeline resistivity S in formula (1)0It, can after being determined by look-up table
By formulaPipeline diameter d is obtained, after pipeline diameter determines, water supply pipe is from water tank sluicing hole site to model
At the top of test stand, with single pvc pipe, length of pipe is determined according to water tank to model test frame distance；Into model test
Behind frame inside, water supply pipe can be divided into more pvc pipe roads laterally or vertically, and every the bottom of the pipeline is with staggered when laterally setting
The two rows of seepage flow holes of setting, every pipeline outside winding geotextiles, line upper portion are laid with certain thickness bentonite；When vertically arranged
For every pipeline surrounding with the staggered multiple rows of seepage flow hole of setting, pipeline winds geotextiles outside.
The above, the preferable specific embodiment of patent only of the present invention, but the protection domain of patent of the present invention is not
This is confined to, any one skilled in the art can readily occur in the technical scope of patent diselosesll of the present invention
Change or replacement, should all cover within the protection domain of patent of the present invention.
Claims (8)
1. a kind of water supply installation of large-scale three dimensional geologic model test, it is characterised in that：It is mainly by supporting rack (1), water supply water
Case (2), pumping water tank (3), water supply pipe (4), water level reader and immersible pump (6) composition, the fixed peace of the water tank (2)
Loaded on supporting rack (1), the residing height of the water tank (2) is higher than the height of model test frame (8), the water tank
(2) there is water injection hole (20) and drain hole (21), the water outlet that the water injection hole (20) passes through pump tubing length (7) and immersible pump (6)
Mouth is connected, and the immersible pump (6) is set in pumping water tank (3) and its water inlet is connected with pumping water tank (3), described to let out
Water hole (21) is arranged on water tank (2) bottom and passes through to control the control valve of water and pressure (50) and water supply pipe
(4) one end connection, the other end of the water supply pipe (4) connect several pipe with small pipe diameter pipelines (40), the pipe with small pipe diameter pipeline
(40) it is arranged in parallel between, the pipe with small pipe diameter pipeline (40) is inserted among the filler inside model test frame, every tubule
Diameter pipeline (40) bottom is provided with seepage flow hole (41), and pipe with small pipe diameter pipeline has been externally wrapped with geotextiles.
2. the water supply installation of large-scale three dimensional geologic model test according to claim 1, it is characterised in that：The water supply water
Spout hole (22) is additionally provided on case (2), valve is installed at the spout hole (22), interior water level is more than when water tank (2)
After spout hole height, water tank (2) interior water flows into the pumping water tank (3) of lower part by spout hole, overflow pipe.
3. the water supply installation of large-scale three dimensional geologic model test according to claim 1 or 2, it is characterised in that：The water
Position reader is mainly made of liquid level sensor (30) and light beam water level display (31), and the liquid level sensor (30) is placed in confession
SEA LEVEL VARIATION situation is observed and reflects water level information on bar graphic display in real time in water tank (2), thus for according to
According to control head height.
4. the water supply installation of the large-scale three dimensional geologic model test according to claims 1 to 3 any one, feature exist
In：The bottom of every pipe with small pipe diameter pipeline (40) is provided with two rows of seepage flow holes (41), and two rows of seepage flow holes (41) are staggered.
5. a kind of application method of the water supply installation of large size geologic model test, which is characterized in that include the following steps：
1) it is used to place water tank higher than the steel support frame of model test frame in outdoor setting；
2) it in the pumping water tank for having at water source setting that can lay in certain moisture storage capacity, stores up and immersible pump is placed in pumping water tank after full water
Water is pumped in water tank by bottom；
3) water tank is placed in steel support frame, overflow pipe and valve, water is set to pass through note at water tank certain altitude
Water hole enters water tank, and when experiment, which opens valve, makes water level in water tank remain at certain altitude, when in water tank
Water is discharged by overflow pipe when water level is higher than preset height；
4) water supply pipe one end connection water tank drain hole, the other end are divided into several minor diameter pipelines and enter in model test frame
Portion, every minor diameter the bottom of the pipeline are provided with two rows of seepage flow holes being laid staggeredly, and geotextiles are wound on the outside of minor diameter pipeline, small straight
Diameter line upper portion is laid with bentonite；
5) when carrying out model test, the control valve (50) at water tank drain hole is opened, liquid level sensor is placed in water supply
Water tank bottom by observing the reading of light beam water level display, adjusts water level in real time.
6. a kind of application method of the water supply installation of large-scale geologic model test according to claim 5, it is characterised in that：
Water tank and supporting rack height are determined according to the flow that experimental design requires, determine formula such as (1)：
H=S0lQ2 (1)
Wherein,Also can table look-up acquisition；S0Pipeline resistivity, l- length of pipe, Q- flows, d- pipeline diameters, λ-pipe
Road frictional resistant coefficient.
7. a kind of application method of the water supply installation of large-scale geologic model test according to claim 6, it is characterised in that：
Water tank capacity is determined with formula (2)
Q'=Vn α (1+ β) (2)
Wherein, moisture storage capacity required for Q'-, V- stratum filtration volumes, n- formation pore rates, α-groundwater recharge rate, β-underground water
Infiltration loss rate；
Determine the experiment porosity n of filler, the volume V for needing seepage action of ground water stratum, groundwater recharge rate α and underground
After water infiltration loss rate β, each parameter is substituted into formula (2) and obtains meeting the required moisture storage capacity of test requirements document.
8. a kind of application method of the water supply installation of large-scale geologic model test according to claim 7, it is characterised in that：
The water supply pipe diameter determines：Pipeline resistivity S in formula (1)0It, can be by formula after being determined by look-up tableIt obtains
Pipeline diameter d is taken, after pipeline diameter determines, water supply pipe is from water tank sluicing hole site to model test top of the trellis, with list
Root pvc pipe, length of pipe are determined according to water tank to model test frame distance；Into after model test frame inside, feed pipe
Road can be divided into more pvc pipe roads laterally or vertically, and laterally every the bottom of the pipeline sets two rows of seepage flow holes with staggered during setting,
Winding geotextiles on the outside of every pipeline, line upper portion are laid with certain thickness bentonite；Every pipeline surrounding is equal when vertically arranged
With the staggered multiple rows of seepage flow hole of setting, geotextiles are wound outside pipeline.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110887954A (en) * | 2019-12-04 | 2020-03-17 | 中国地质科学院岩溶地质研究所 | Physical simulation experiment device and method capable of controlling soil cave forming process |
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| CN110887954A (en) * | 2019-12-04 | 2020-03-17 | 中国地质科学院岩溶地质研究所 | Physical simulation experiment device and method capable of controlling soil cave forming process |
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