CN206618667U - It is a kind of to be used for the experimental rig of property evolution under simulation concrete cut-pff wall Service Environment - Google Patents
It is a kind of to be used for the experimental rig of property evolution under simulation concrete cut-pff wall Service Environment Download PDFInfo
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- CN206618667U CN206618667U CN201720341864.9U CN201720341864U CN206618667U CN 206618667 U CN206618667 U CN 206618667U CN 201720341864 U CN201720341864 U CN 201720341864U CN 206618667 U CN206618667 U CN 206618667U
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- ring set
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- epicoele
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Abstract
It is a kind of to be used for the experimental rig of property evolution under simulation concrete cut-pff wall Service Environment, ring set, end cap, base, piston, jack, water tank, vavuum pump, pressure sensor, water pump；Ring set is used for the ring set for sealing concrete sample side wall；Ring set is pressed on base by end cap by many screws, is provided with seal between ring set and base between ring set and end cap；There is a cavity being connected with ring set in base, piston is installed in the cavities, cavity is separated into epicoele and cavity of resorption by piston, jack is placed in cavity of resorption, jack lift side is with being connected on piston, epicoele is connected by exhaust tube with vavuum pump, and epicoele is connected by water inlet pipe with water tank, and water pump is arranged on water inlet pipe；Pressure sensor is used for the hydraulic pressure for monitoring intracavitary.
Description
Technical field
The utility model is related to a kind of experimental rig for property evolution under simulation concrete cut-pff wall Service Environment.
Background technology
Because the regional hydraulic power potentials such as northeast, North China, East China and south China is less, majority was developed already, therefore construction of hydropower facilities
Emphasis just progressively moving to the abundant western part and Localities In Southwest of water resource.Exploitation western part and Localities In Southwest hydraulic power potentials, build
If power station, frequently encounter and deep sand gravel coating problem is deposited in river valley, thickness is generally 40~70m, had even
In more than 100m.
Increasingly normalization for building dam on deeply covered layer, the seepage control method of deep covering layer ground is dam engineering
Design and the key point of safe operation.Because concrete cut is good to various stratum and dam type adaptability, cost is relatively low anti-
Ooze performance and effect is reliable, seepage control of dam measure connects the structure of cut-pff wall under typically using.
Along with developing rapidly for water resources and hydropower construction, by practice, impervious wall construction technology is passed through bold improvement, carried
High and innovation, triumphantly completes the big alluvial deposit foundation Anti-seeping technology engineering of many complex geologic conditions, difficulty of construction.But with
And come, we it will be noted that cut-pff wall belongs to the concealed work of ground, and for cut-pff wall monitoring device it is buried in
Under water, working environment is complicated, and setting property of monitoring hardly results in guarantee, and the potential safety hazard of cut-pff wall should not be found in time, potentially shadow
Ring the long-term safety operation of engineering.Therefore, the research of concrete cut work condition is carried out with important theoretical and real
Trample meaning.
Study concrete cut work condition and security, from cut-pff wall under arms during the characteristics of start with.Nothing
Doubt, cut-pff wall subjects the effect of Thief zone gradient water ballast(ing) under environment under arms.And current, the knowledge that people accumulate in this respect
It is all seldom with experience.Therefore, developing corresponding testing equipment, carry out the infiltration of Thief zone gradient pressure Under Concrete, mechanics
Characteristic research is very important.
The content of the invention
The technical problem that the utility model is solved is to provide a kind of for performance under simulation concrete cut-pff wall Service Environment
The experimental rig of evolution, can be measured, and it is permeated to the infiltration coefficient of concrete cut under true Service Environment
The CaO stripping quantities gone out are measured, and go to estimate the safe operating life of cut-pff wall, to solve current Thief zone gradient device development
Few, and operability is not strong in cost height, equipment costliness, actual tests the problem of.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is：One kind is used for simulation concrete cut-pff wall
The experimental rig of property evolution under Service Environment, ring set, end cap, base, piston, jack, water tank, vavuum pump, pressure sensing
Device, water pump；
Ring set is used for the ring set for sealing concrete sample side wall；
Ring set is pressed on base by end cap by many screws, is set between ring set and end cap between ring set and base
There is seal；
There is a cavity being connected with ring set, piston is installed in the cavities, and cavity is separated into by piston in base
Chamber and cavity of resorption, jack are placed in cavity of resorption, and jack lift side is with being connected on piston, and epicoele passes through exhaust tube and vavuum pump
Connection, epicoele is connected by water inlet pipe with water tank, and water pump is arranged on water inlet pipe；Pressure sensor is used for the water for monitoring intracavitary
Pressure.
The ring set includes two pieces of arcs, and one section of otic placode is each extended over out along horizontal direction at each arc two ends,
Multiple through holes, covered with one block of rubber slab on arc internal face and otic placode, each arc two ends are provided with each otic placode
Otic placode is connected by multigroup fastener respectively；After arc two ends otic placode is connected, two pieces of arcs are by two blocks of rubber slabs
It is pressed on outside concrete sample side wall.
Absorbent member is provided with end cap, the absorbent member is included the cloth bag made using non-woven fabrics, is filled with cloth bag
High hydroscopic resin, non-woven fabrics or cotton.
The end cap includes end flanges, block is connected in end flanges, ring set is pressed on by end flanges by many screws
On base, the through hole for being placed and taken out absorbent member is offered in block, one piece of cover plate is covered on through hole, for through hole to be entered
Row closing.
The beneficial effects of the utility model are：Using the water in jack top pressure epicoele, water pressure invariableness in epicoele, system are kept
Make then can collect the water oozed out, profit with the true hydraulic gradient under simulation concrete cut-pff wall Service Environment by absorbent member
The infiltration coefficient of concrete under true hydraulic gradient is calculated with water percolating capacity；And with EDTA titrations to the CaO content in water seepage
Tested, estimate the safe operating life of cut-pff wall.
Brief description of the drawings
The utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is main view cross-sectional view of the present utility model,
Fig. 2 is the cross-sectional view at A-A in Fig. 1.
In figure：Base 1, water tank 2, ring set 3, end cap 4, concrete sample 5, vavuum pump 6, jack 7, water pump 8, pressure are passed
Sensor 9, epicoele 11, cavity of resorption 12, otic placode 31, rubber slab 32, arc 33, end flanges 41, block 42, exhaust tube 61, piston 71,
Water inlet pipe 81, check valve 82.
Embodiment
As illustrated in fig. 1 and 2, it is a kind of to be used for the experimental rig of property evolution under simulation concrete cut-pff wall Service Environment, ring
Set 3, end cap 4, base 1, piston 71, jack 7, water tank 2, vavuum pump 6, pressure sensor 9, water pump 8；
Ring set 3 is used for the ring set 3 for sealing the side wall of concrete sample 5；
Ring set 3 is pressed on base 1 by end cap 4 by many screws, between ring set 3 and end cap 4 and ring set 3 and base
Seal 14 is provided between 1, seal 14 is rubber ring or copper packing；
There is a cavity being connected with ring set 3, piston 71 is installed in the cavities, and piston 71 divides cavity in base 1
Epicoele 11 and cavity of resorption 12 are divided into, jack 7 is placed in cavity of resorption 12, the piston rod of jack 7 is with being fixedly connected on piston 71, thousand
Jin top 7 is hydraulic jack 7, and piston 71 is moved up and down as the piston rod of jack 7 stretches in epicoele 11, in the side of base 1
Offer an opening 13 with insertion hydraulic oil pipe；
Epicoele 11 is connected by exhaust tube 61 with vavuum pump 6, and epicoele 11 is connected by water inlet pipe 81 with water tank 2, in water inlet
Check valve 82 is installed, water pump 8 is arranged on water inlet pipe 81 on pipe 81；Pressure sensor 9 is used to monitor the hydraulic pressure in epicoele 11.
The ring set 3 includes two pieces of arcs 33, and one section is each extended over out along horizontal direction at each two ends of arc 33
Otic placode 31, is provided with multiple through holes, covered with one block of rubber slab on the internal face of arc 33 and otic placode 31, respectively on each otic placode 31
The otic placode 31 at the two ends of arc 33 is connected by multigroup fastener respectively；After the two ends otic placode 31 of arc 33 is connected, two
Two blocks of rubber slabs are pressed on outside the side wall of concrete sample 5 by block arc 33.
Absorbent member is provided with end cap 4, the absorbent member is included the cloth bag made using non-woven fabrics, is filled with cloth bag
High hydroscopic resin, non-woven fabrics or cotton.Absorbent member (being not drawn into figure) is used for measuring the water percolating capacity of concrete sample 5, makes
Used time, absorbent member is placed on the surface of concrete sample 5, interval is taken out absorbent member and weighed after 1 to 2 hours, front and rear sides quality
Difference is the water percolating capacity of the period.
The end cap 4 includes end flanges 41, block 42 is connected in end flanges 41, end flanges 41 are by many screws by ring
Set 3 is pressed on base 1, the through hole for being placed and taken out absorbent member is offered in block 42, one piece of cover plate is (in cover plate figure
It is not drawn into) cover on through hole, for through hole to be closed.Cover plate is used to prevent the moisture evaporation in absorbent member.
It is a kind of to be used for the experimental rig operating method of property evolution under simulation concrete cut-pff wall Service Environment, specific steps
It is as follows：
1) concrete sample to be measured is placed into ring set 3, using arc 33 and rubber slab 32 to the side of concrete sample 5
Wall is sealed；
2) first ring set 3 is placed between end cap 4 and base 1, then the screw rotation for connecting end cap 4 and base 1 is leaned on；
3) open vavuum pump 6 and extract the air in epicoele 11 out a part；
4) water is entered to go in epicoele 11 by water inlet pipe 81, and when water covers exhaust tube 61, vavuum pump 6 stops, water pump 8 is opened,
When gap of the water in epicoele 11 between ring set 3 and base 1 is squeezed out, the screw means of end cap 4 and base 1 will be connected,
Ring set 3 is sealed, water pump 8 is simultaneously closed off；
5) hydraulic gradient of designing for manufacturing：Hydraulic jack 7 is run, epicoele 11 is pressurizeed, it is aobvious to pressure sensor 9
The pressure of jack 7 is maintained after pressure needed for showing experiment；
Hydraulic gradient calculation formula is：
In formula：H tests water pressure, is represented with water-column, cm,
J is design hydraulic gradient,
L is the infiltration height (test specimen is high) of concrete sample, cm.
Difference gauge and H relation is：1m head is equal to 0.01mpa, and difference gauge can convert the pressure value measured
For head value, such as difference gauge measures pressure value for 0.2mpa, then can be output as 20m head；
For example：If the Service Environment that concrete test need to be simulated is：The antiseepage wall thickness of dam is 1m, and dam water level is high
200m, the then actual hydraulic slope of damThen design concrete sample is 15cm test cubes,
Infiltration gradient (hydraulic gradient) needed for experiment is 200, then needs test head H=JL=200 × 15=3000cm=30m,
Then difference gauge to display pressure value be 0.3mpa when, maintain pressure value, tested.
6) water percolating capacity first, measured with absorbent member calculates the infiltration coefficient of concrete；
Concrete filtration coefficient calculation formula is：
In formula：kTThe infiltration coefficient cm/s of test specimen during T DEG C of coolant-temperature gage,
Seepage discharge in t seconds Q times, cm3,
The infiltration height (test specimen is high) of L test specimens, cm,
H tests water pressure, is represented with water-column, cm,
T interval times, s,
A test specimen averga cross section areas, cm2,
k20The infiltration coefficient of test specimen during 20 DEG C of normal temperature, cm/s,
ηT、η20The coefficient of dynamic viscosity of water at respectively T DEG C and 20 DEG C, kPa.s,
Secondly the infiltration collected with absorbent member measures the durability of concrete cut；
For cut-pff wall, the evaluation index of its durability is long-term anti-seepage effect, and influences the master of long-term anti-seepage effect
The density that factor is materials for wall is wanted, whether the density of concrete is depended mainly on produces seepage and corrosion.Work as concrete
When middle CaO stripping quantities are up to 25%, the intensity of concrete will reduce by 50%, at present on evaluation index, reach CaO stripping quantities
25% as limit index, and thus estimates the safe operating life of cut-pff wall.
The durability (safe operating life) of concrete cut is by the relax calculation formula of scholar diligent proposition of Chinese scholar：
In formula：T be cut-pff wall safe service life, a,
V is the corresponding materials for wall volume of every square metre of cut-pff wall upstream face, and its numerical value is equal to wall thickness, m3,
Cement consumption in every cubic metre of cut-pff wall material of C, kg/m3,
Q is the leakage in every square metre of cut-pff wall 1 year, m3/(m2.a),
M is the CaO concentration of cut-pff wall water seepage (water seepage that absorbing component is collected), kg/m3,
M is the CaO concentration of underground water (test water), kg/m3,
α is the CaO content in cement, kg/m3。
Wherein：The test of CaO content EDTA titrations.
7) after off-test, hydraulic jack 7 is closed, epicoele 11 is depressured, pressure value is shown to pressure sensor 9
Untill 0；
8) concrete sample 5 is taken out, experiment is completed.
Claims (4)
1. a kind of be used for the experimental rig of property evolution under simulation concrete cut-pff wall Service Environment, it is characterised in that：Ring set
（3）, end cap（4）, base（1）, piston（71）, jack（7）, water tank（2）, vavuum pump（6）, pressure sensor（9）, water pump
（8）；
Ring set（3）For sealing concrete sample（5）The ring set of side wall（3）；
End cap（4）By many screws by ring set（3）It is pressed on base（1）On, in ring set（3）With end cap（4）Between and ring set
（3）With base（1）Between be provided with seal（14）；
Base（1）Inside there is one and ring set（3）The cavity being connected, piston（71）Install in the cavities, piston（71）By sky
Chamber is separated into epicoele（11）And cavity of resorption（12）, jack（7）It is placed in cavity of resorption（12）In, jack（7）Lift side is with being connected to
Piston（71）On, epicoele（11）Pass through exhaust tube（61）With vavuum pump（6）Connection, epicoele（11）Pass through water inlet pipe（81）With water tank
（2）Connection, water pump（8）Installed in water inlet pipe（81）On；Pressure sensor（9）For monitoring epicoele（11）Interior hydraulic pressure.
2. a kind of experiment dress for being used for property evolution under simulation concrete cut-pff wall Service Environment according to claim 1
Put, it is characterised in that：The ring set（3）Including two pieces of arcs（33）, in each arc（33）Two ends are divided along horizontal direction
Do not extend one section of otic placode（31）, in each otic placode（31）Multiple through holes are provided with, in arc（33）Internal face and otic placode（31）
On covered with one block of rubber slab（32）, each arc（33）The otic placode at two ends（31）It is connected respectively by multigroup fastener；
By arc（33）Two ends otic placode（31）After connection, two pieces of arcs（33）By two blocks of rubber slabs（32）It is pressed on concrete sample
（5）Outside side wall.
3. a kind of experiment dress for being used for property evolution under simulation concrete cut-pff wall Service Environment according to claim 1
Put, it is characterised in that：In end cap（4）Interior to be provided with absorbent member, the absorbent member includes the cloth bag made using non-woven fabrics, in cloth bag
Inside it is filled with high hydroscopic resin, non-woven fabrics or cotton.
4. a kind of experiment dress for being used for property evolution under simulation concrete cut-pff wall Service Environment according to claim 2
Put, it is characterised in that：The end cap（4）Including end flanges（41）, in end flanges（41）Upper connection block（42）, end flanges（41）
By many screws by ring set（3）It is pressed on base（1）On, in block（42）Offer for being placed and taken out the logical of absorbent member
Hole, one piece of cover plate is covered on through hole, for through hole to be closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720341864.9U CN206618667U (en) | 2017-04-01 | 2017-04-01 | It is a kind of to be used for the experimental rig of property evolution under simulation concrete cut-pff wall Service Environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720341864.9U CN206618667U (en) | 2017-04-01 | 2017-04-01 | It is a kind of to be used for the experimental rig of property evolution under simulation concrete cut-pff wall Service Environment |
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| Publication Number | Publication Date |
|---|---|
| CN206618667U true CN206618667U (en) | 2017-11-07 |
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ID=60235276
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| CN201720341864.9U Expired - Fee Related CN206618667U (en) | 2017-04-01 | 2017-04-01 | It is a kind of to be used for the experimental rig of property evolution under simulation concrete cut-pff wall Service Environment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374507A (en) * | 2018-12-05 | 2019-02-22 | 中国矿业大学(北京) | A kind of experimental rig of test simulation scall water permeability |
| CN109374502A (en) * | 2018-11-19 | 2019-02-22 | 江苏科技大学 | Water head difference penetration test device under load-holding condition |
| CN109612910A (en) * | 2019-02-22 | 2019-04-12 | 常州工程职业技术学院 | A kind of portable pervious concrete pavement device for testing permeability coefficient and test method |
| CN110670883A (en) * | 2019-09-26 | 2020-01-10 | 长安大学 | Grouting device and method for determining grouting material grouting property thereof |
| CN114577560A (en) * | 2022-01-11 | 2022-06-03 | 四川大学 | Experimental device and method for in-situ maintenance and test of underwater concrete |
-
2017
- 2017-04-01 CN CN201720341864.9U patent/CN206618667U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374502A (en) * | 2018-11-19 | 2019-02-22 | 江苏科技大学 | Water head difference penetration test device under load-holding condition |
| CN109374502B (en) * | 2018-11-19 | 2022-05-13 | 江苏科技大学 | Water head difference penetration test device under load-holding condition |
| CN109374507A (en) * | 2018-12-05 | 2019-02-22 | 中国矿业大学(北京) | A kind of experimental rig of test simulation scall water permeability |
| CN109612910A (en) * | 2019-02-22 | 2019-04-12 | 常州工程职业技术学院 | A kind of portable pervious concrete pavement device for testing permeability coefficient and test method |
| CN110670883A (en) * | 2019-09-26 | 2020-01-10 | 长安大学 | Grouting device and method for determining grouting material grouting property thereof |
| CN110670883B (en) * | 2019-09-26 | 2021-07-27 | 长安大学 | Grouting device and method for determining grouting material grouting property thereof |
| CN114577560A (en) * | 2022-01-11 | 2022-06-03 | 四川大学 | Experimental device and method for in-situ maintenance and test of underwater concrete |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171107 Termination date: 20180401 |
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