CN109855962A - Buried concrete stray electrical current and cyclical impact loading pilot system and experimental method - Google Patents
Buried concrete stray electrical current and cyclical impact loading pilot system and experimental method Download PDFInfo
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- 239000004567 concrete Substances 0.000 title claims abstract description 100
- 238000002474 experimental method Methods 0.000 title claims description 18
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 239000002689 soil Substances 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 23
- 239000010439 graphite Substances 0.000 claims abstract description 23
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical class [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 22
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000003204 osmotic effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000004901 spalling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 238000004445 quantitative analysis Methods 0.000 abstract description 3
- 238000004451 qualitative analysis Methods 0.000 abstract 1
- 238000011160 research Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011981 development test Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to buried concrete stray electrical current and cyclical impact loading pilot systems, including framework for support, experimental tank, press machine, jack, bearing plate, potentiostat, volt ampere meter, graphite electrode plate, copper/saturated copper sulphate reference electrode, connecting terminal, liner plate and control circuit, experimental tank is in framework for support, press machine is mounted on framework for support upper surface and bearing plate is connected with each other, bearing plate is located in framework for support and is located at right above experimental tank, jack is located at framework for support lateral surface, front end face is connect with liner plate rear end face, liner plate is inscribed embedded in experimental tank, potentiostat, volt ampere meter is respectively positioned on framework for support lateral surface, wherein potentiostat respectively with graphite electrode plate, copper/saturated copper sulphate reference electrode is connected with each other, volt ampere meter and connecting terminal are electrically connected.The present invention is convenient for the qualitative and quantitative analysis of armored concrete；Lateral static load is applied with to concrete test block to simulate the soil pressure effect that underground concrete structure is subject to, more meets actual loading situation.
Description
Technical field
The present invention relates to a kind of buried concrete stray electrical current and cyclical impact loading pilot system and experimental method, belongs to building
Field of engineering technology.
Background technique
With the continuous propulsion of urbanization process, more and more cities start to build Underground Rail Transit to alleviate ground
Traffic pressure facilitates people to go on a journey.During metro operation, due to by inevitable pollution, moist, infiltration and highland
The influence of stress etc., make subway tunnel China rail, insulation performance reduce, thus the concrete structure in railway roadbed bottom
And stray electrical current is formed in soil.The presence of stray electrical current can greatly speed up the corrosion rate of reinforcement in concrete.Furthermore subway
In the process of moving, railway roadbed lower part coagulation body structure is chronically at stress fatigue state constantly by vertical impact load to train.
Therefore, micromechanism of damage and durability state of the Study of The Underground concrete structure under stray electrical current and cyclical impact loading effect are commented
Valence becomes the hot fields of Recent study.
Existing some underground concrete structure durability development test devices, the influence for more laying particular emphasis on a certain factor are ground
Study carefully.Because of the complexity of underground engineering local environment, it is qualitative research that influence under multifactor collective effect research is also mostly, it is each because
The quantitative study that element influences joint effect is rarer.Therefore, there is an urgent need to develop a kind of buried concretes in various factors coupling
Pilot system under effect.
Summary of the invention
In order to solve the deficiency in the prior art, the present invention provides a kind of buried concrete stray electrical current and circulation impact lotus
Carry pilot system and experimental method.
In order to realize effect above-mentioned, a kind of buried concrete stray electrical current and cyclical impact loading test are proposed
System and experimental method comprising following steps:
Buried concrete stray electrical current and cyclical impact loading pilot system, including it is framework for support, experimental tank, press machine, very heavy
Top, bearing plate, potentiostat, volt ampere meter, graphite electrode plate, copper/saturated copper sulphate reference electrode, connecting terminal, liner plate and control electricity
Road, wherein framework for support is the frame structure that cross section is rectangle, and axis and horizontal plane are distributed, and experimental tank is cross section
It in " Qian " font groove-like structure, is coaxially distributed in framework for support with framework for support, press machine is mounted on framework for support upper end
Face is simultaneously coaxially distributed with framework for support, and the formed punch of press machine is connected with each other with bearing plate and is coaxially distributed, and bearing plate is located at carrying
In rack and it is located at right above experimental tank, jack is located at framework for support lateral surface, and axis is vertical with experimental tank axis
And intersect, and intersection point is located at experimental tank center position, the corresponding experimental tank side surface of jack sets open-work, jack front end face
Be located in experimental tank by open-work and connect with liner plate rear end face and be coaxially distributed with liner plate, liner plate in the experimental tank and with reality
Check of foundation subsoil axis parallelly distribute on, and connect respectively with experiment groove sidewall and basal sliding, potentiostat, volt ampere meter are respectively positioned on carrying machine
Frame lateral surface, wherein potentiostat is connected with each other with graphite electrode plate, copper/saturated copper sulphate reference electrode respectively, volt ampere meter and wiring
Terminal electrical connection, graphite electrode plate, copper/saturated copper sulphate reference electrode at least one, and a graphite electrode plate and one are full
A working group, connecting terminal at least two are constituted with copper sulfate reference electrode, and two connecting terminals constitute a detection group,
Between graphite electrode plate and concrete test block, control circuit is located at holds copper/saturated copper sulphate reference electrode in same working group
Carrier aircraft frame side surface, and be electrically connected respectively with press machine, jack, potentiostat, volt ampere meter.
Further, it is mutually slidably connected between the experiment trench bottom and framework for support bottom by directive slide track, and
Test 50% -80% that groove height is framework for support height.
Further, the bearing plate includes loading plate, pressure-bearing spring and scale, wherein the loading plate totally two
It is a, it is parallel to each other between two loading plates and is distributed and is connected with each other by pressure-bearing spring, the pressure-bearing spring is several, around loading plate
Axis is uniformly distributed, totally two, the scale, symmetrical with loading plate midpoint and connect with underlying loading plate side surface,
The scale respectively with two loading plate plate face vertical distributions.
Further, the pressure-bearing both ends of the spring is all provided with pressure sensor, and each pressure sensor is electric with control circuit
Gas connection.
Further, at least one pressure sensor, institute are all provided between the press machine and bearing plate, jack and liner plate
The pressure sensor and control circuit stated are electrically connected.
Further, the bearing plate lower end surface and liner plate front end face are evenly distributed with several convex blocks.
It advanced optimizes, the convex block cross section is in isosceles trapezoid, isosceles triangle, rectangle and arc structure
Any one.
Further, the control circuit is SCM Based circuit system.
The experimental method of buried concrete stray electrical current and cyclical impact loading pilot system, comprising the following steps:
S1, concrete block is prefabricated, is prepared first according to the volume of experimental tank by concrete block to be detected, makes concrete to be detected
Block product is 30%-the 80% of experimental tank volume, then concrete block to be detected is placed into experimental tank and same with experimental tank
Axis distribution, and will be electrically connected between same reinforcing bar end positions in the connecting terminal and concrete block to be detected of same detection group
And initial resistivity value is detected, and graphite electrode plate, copper/saturated copper sulphate reference electrode are located in concrete block to be detected and reality
Position between check of foundation subsoil side wall, then take concrete block to be detected in actual use in natural environment peripheral position soil, so
Soil is filled in experimental tank and being coated on outside concrete block to be detected afterwards, compacting and water content tune then are carried out to soil
It is whole, make pressure and moisture content osmotic condition of the soil to concrete block to be detected and the soil ring in natural environment in actual use
Border is consistent, can the achievable loading to concrete block to be detected position, will finally complete concrete block to be detected
The experimental tank for loading positioning is installed in framework for support and is coaxially distributed between framework for support；
S2, experiment detection after completing the operation of S1 step, on the one hand drive liner plate to apply concrete block to be detected by jack
Add horizontal direction constant pressure, on the other hand drives bearing plate to pump by press machine first, by bearing plate
To in experimental tank concrete block to be detected apply vertical direction on alternating pressure, meanwhile, by the anode of potentiostat with
Reinforcing bar connection in concrete test block, cathode are connect with graphite electrode plate, are applied to the soil for coating concrete block to be detected
Stray electrical current is connected reference electrode current potential with copper/saturated copper sulphate reference electrode, to keep the constant of output factors electric current.Most
After closing potentiostat afterwards, reinforcing bar current value is detected by ammeter, realizes and concrete block to be detected is carried out
Stray electrical current environment and cyclical impact loading and the load environment deposited carries out detection operation, and will test result and summarize to control electricity
Lu Zhong；
S3, data processing, the detection data result obtained by control circuit according to S2 step is foundation, on the one hand by pressure sensing
Device detection pressure value obtains the cyclical impact loading size and horizontal static load size that concrete block to be detected is subject to；On the other hand
According to resistance calculations formula:If the resistance measured has increase before starting compared with S1 arrangement, reinforcing bar starts to generate electricity
Chemical corrosion.
Further, spuious carrying out a potentiostat application to concrete block to be detected in the S2 step
An ammeter is carried out after electric current operation to detect reinforcing bar current value, constitutes a testing process, and treat in S2 step
The concrete block of detection need to be carried out continuously repeated detection process, until concrete test block spalling.Constant potential in same testing process
Time interval is answered equal between instrument operation and ammeter detection, and with 1 hour for basic unit.
Further, the resistance calculations formula:In,
R is resistance；
For resistivity；
To detect reinforcing bar length；
To detect bar cross section area.
Impact load and stray electrical current not only can be with independent roles in the present invention, but also can be independent of each other, jointly with collective effect
When effect, it can control the impact load size and stray electrical current size tested every time, be convenient for the qualitative of armored concrete
And quantitative analysis；Lateral static load is applied with to concrete test block to simulate the soil pressure effect that underground concrete structure is subject to, more
Meet actual loading situation；By increasing parallel circuit in potentiostat anode, it is same that more reinforcing bars in concrete test block may be implemented
When test, have the very strong property be transformed.Therefore, technical solution of the present invention can be widely applied to underground engineering reinforced concrete
The research of soil structure durability.
Detailed description of the invention
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments；
Fig. 1 is schematic structural view of the invention
Fig. 2 is the method for the present invention flow chart.
Specific embodiment
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to construct, below with reference to specific
Embodiment, the present invention is further explained.
Buried concrete stray electrical current and cyclical impact loading pilot system as described in Figure 1, including framework for support 1, reality
Check of foundation subsoil 2, press machine 3, jack 4, bearing plate 5, potentiostat 6, volt ampere meter 7, graphite electrode plate 8, copper/saturated copper sulphate reference electricity
Pole 9, connecting terminal 10, liner plate 11 and control circuit 12, wherein framework for support 1 is the frame structure that cross section is rectangle, axis
Line and horizontal plane are distributed, and experimental tank 2 is that cross section is in " Qian " font groove-like structure, are embedded in framework for support 1 and carrying machine
Frame 1 coaxially be distributed, press machine 3 be mounted on 1 upper surface of framework for support and with the coaxial distribution of framework for support 1, the formed punch of press machine 3 and
Bearing plate 5 is connected with each other and is coaxially distributed, and bearing plate 5 is located in framework for support 1 and is located at right above experimental tank 2,3, jack
In 1 lateral surface of framework for support, 4 axis of jack is vertical with 2 axis of experimental tank and intersects, and intersection point is located at 2 centre bit of experimental tank
Place is set, corresponding 2 side surface of experimental tank of jack 4 sets open-work 13, and 4 front end face of jack is located in experimental tank 2 by open-work 13
And connect with 11 rear end face of liner plate and with the coaxial distribution of liner plate 11, liner plate 11 is in the experimental tank 2 and parallel with 2 axis of experimental tank
Distribution, and connect respectively with 2 side wall of experimental tank and basal sliding, potentiostat 6, volt ampere meter 7 are respectively positioned on 1 outside of framework for support
Face, wherein potentiostat 6 is connected with each other with graphite electrode plate 8, copper/saturated copper sulphate reference electrode 9 respectively, volt ampere meter 7 and terminals
Son 10 is electrically connected, graphite electrode plate 8, copper/saturated copper sulphate reference electrode 9 it is equal at least one, and a graphite electrode plate 8 and one
A copper/saturated copper sulphate reference electrode 9 constitutes a working group, connecting terminal 10 at least two, and two connecting terminals 10 constitute one
A detection group, 9 graphite electrode plate 8, copper/saturated copper sulphate reference electrode spacing in same working group are not more than 2 width of experimental tank
1/2, control circuit 12 is located at 1 side surface of framework for support, and respectively with press machine 3, jack 4, potentiostat 6, volt ampere meter 7
Electrical connection.
In the present embodiment, connected between 1 bottom of 2 bottom of experimental tank and framework for support by the mutually sliding of directive slide track 14
It connects, and 2 height of experimental tank is 50%-the 80% of 1 height of framework for support.
Wherein, the bearing plate 5 includes loading plate 51, pressure-bearing spring 52 and scale 53, wherein the loading plate 51
It totally two, being parallel to each other between two loading plates 51 and is distributed and is connected with each other by pressure-bearing spring 52, the pressure-bearing spring 52 is several,
It is uniformly distributed around 51 axis of loading plate, totally two, the scale 53, with 51 midpoint of loading plate it is symmetrical and with it is underlying
51 side surface of loading plate connection, the scale 53 respectively with two 51 plate face vertical distributions of loading plate, the pressure-bearing spring 52
Both ends are all provided with pressure sensor 15, and each pressure sensor 15 is electrically connected with control circuit 12.
In addition, being all provided at least one pressure sensor between the press machine 3 and bearing plate 5, jack 4 and liner plate 11
15, the pressure sensor 15 and control circuit 12 are electrically connected.
At the same time, 5 lower end surface of bearing plate and 11 front end face of liner plate are evenly distributed with several convex blocks 16, the convex block 16
Cross section is any one in isosceles trapezoid, isosceles triangle, rectangle and arc structure.
In the present embodiment, the control circuit 12 is SCM Based circuit system.
As shown in Fig. 2, the experimental method of buried concrete stray electrical current and cyclical impact loading pilot system, including it is following
Step:
S1, concrete block is prefabricated, is prepared first according to the volume of experimental tank by concrete block to be detected, makes concrete to be detected
Block product is 30%-the 80% of experimental tank volume, then concrete block to be detected is placed into experimental tank and same with experimental tank
Axis distribution, and will electrically connect between 17 end positions of reinforcing bar same in the connecting terminal and concrete block to be detected of same detection group
Connect and detect initial resistivity value, and by graphite electrode plate, copper/saturated copper sulphate reference electrode be located in concrete block to be detected with
Test position between groove sidewall, then take concrete block to be detected in actual use in natural environment peripheral position soil
18, then soil 18 is filled in experimental tank and being coated on outside concrete block to be detected, then soil 18 is compacted
It is adjusted with water content, makes soil 18 to the pressure and moisture content osmotic condition and natural ring in actual use of concrete block to be detected
Soil environment in border is consistent, can the achievable loading to concrete block to be detected position, will finally complete to be checked
The experimental tank that the concrete block of survey loads positioning is installed in framework for support and is coaxially distributed between framework for support；
S2, experiment detection after completing the operation of S1 step, on the one hand drive liner plate to apply concrete block to be detected by jack
Add horizontal direction constant pressure, on the other hand drives bearing plate to pump by press machine first, by bearing plate
To in experimental tank concrete block to be detected apply vertical direction on alternating pressure, meanwhile, by the anode of potentiostat with
Reinforcing bar connection in concrete test block, cathode are connect with graphite electrode plate, are applied to the soil for coating concrete block to be detected
Stray electrical current is connected reference electrode current potential with copper/saturated copper sulphate reference electrode, to keep the constant of output factors electric current.Most
After closing potentiostat afterwards, reinforcing bar current value is detected by ammeter, realizes and concrete block to be detected is carried out
Stray electrical current environment and cyclical impact loading and the load environment deposited carries out detection operation, and will test result and summarize to control electricity
Lu Zhong；
S3, data processing, the detection data result obtained by control circuit according to S2 step is foundation, on the one hand by pressure sensing
Device detection pressure value obtains the cyclical impact loading size and horizontal static load size that concrete block to be detected is subject to, on the other hand
According to resistance calculations formula:If the resistance measured has increase before starting compared with S1 arrangement, reinforcing bar 17 starts to produce
Raw electrochemical rust.
Wherein, in the S2 step, apply stray electrical current carrying out a potentiostat to concrete block to be detected
An ammeter is carried out after operation to detect reinforcing bar current value, constitutes a testing process, and to be detected in S2 step
Concrete block need to be carried out continuously repeated detection process, until concrete test block spalling.Potentiostat is made in same testing process
Time interval is answered equal between industry and ammeter detection, and with 1 hour for basic unit.
In S3 step: resistance calculations formula:In；
R is resistance；
For resistivity；
To detect reinforcing bar length；
To detect bar cross section area.
Impact load and stray electrical current not only can be with independent roles in the present invention, but also can be independent of each other, jointly with collective effect
When effect, it can control the impact load size and stray electrical current size tested every time, be convenient for the qualitative of armored concrete
And quantitative analysis；Lateral static load is applied with to concrete test block to simulate the soil pressure effect that underground concrete structure is subject to, more
Meet actual loading situation；By increasing parallel circuit in potentiostat anode, it is same that more reinforcing bars in concrete test block may be implemented
When test, have the very strong property be transformed.Therefore, technical solution of the present invention can be widely applied to underground engineering reinforced concrete
The research of soil structure durability.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. buried concrete stray electrical current and cyclical impact loading pilot system, it is characterised in that: the buried concrete is miscellaneous
It dissipates electric current and cyclical impact loading pilot system includes framework for support, experimental tank, press machine, jack, bearing plate, constant potential
Instrument, volt ampere meter, graphite electrode plate, copper/saturated copper sulphate reference electrode, connecting terminal, liner plate and control circuit, wherein described holds
Carrier aircraft frame is the frame structure that cross section is rectangle, and axis and horizontal plane are distributed, and the experimental tank is in for cross section
" Qian " font groove-like structure, is coaxially distributed in framework for support with framework for support, and the press machine is mounted on framework for support
Upper surface is simultaneously coaxially distributed with framework for support, and the formed punch of the press machine is connected with each other with bearing plate and is coaxially distributed, described
Bearing plate be located in framework for support and be located at right above experimental tank, the jack is located at framework for support lateral surface, very heavy
Apical axis line is vertical with experimental tank axis and intersects, and intersection point is located at experimental tank center position, the corresponding reality of the jack
Check of foundation subsoil side surface sets open-work, and it is interior and connect with liner plate rear end face and same with liner plate that jack front end face by open-work is located at experimental tank
Axis distribution, the liner plate in the experimental tank and with experimental tank axis parallelly distribute on, and respectively with experiment groove sidewall and bottom
Be slidably connected, the potentiostat, volt ampere meter are respectively positioned on framework for support lateral surface, wherein potentiostat respectively with graphite electrode
Plate, copper/saturated copper sulphate reference electrode are connected with each other, and volt ampere meter and connecting terminal are electrically connected, the graphite electrode plate, saturation
Copper sulfate reference electrode at least one, and a graphite electrode plate and copper/saturated copper sulphate reference electrode constitute a job
Group, the connecting terminal at least two, and two connecting terminals constitute a detection group, the saturation sulfuric acid in same working group
For copper reference electrode between graphite electrode plate and concrete test block, the control circuit is located at framework for support side surface, and
It is electrically connected respectively with press machine, jack, potentiostat, volt ampere meter.
2. buried concrete stray electrical current according to claim 1 and cyclical impact loading pilot system, which is characterized in that
It is mutually slidably connected between the experiment trench bottom and framework for support bottom by directive slide track, and testing groove height is carrying machine
50%-the 80% of frame height.
3. buried concrete stray electrical current according to claim 1 and cyclical impact loading pilot system, which is characterized in that
The bearing plate includes loading plate, pressure-bearing spring and scale, mutually flat between two loading plates wherein described loading plate totally two
Row is distributed and is connected with each other by pressure-bearing spring, and the pressure-bearing spring is several, the scale uniformly distributed, described around carrying plate axis
It is totally two, symmetrical with loading plate midpoint and connect with underlying loading plate side surface, the scale respectively with two
Loading plate plate face vertical distribution.
4. buried concrete stray electrical current according to claim 3 and cyclical impact loading pilot system, which is characterized in that
The pressure-bearing both ends of the spring is all provided with pressure sensor, and each pressure sensor is electrically connected with control circuit.
5. buried concrete stray electrical current according to claim 1 and cyclical impact loading pilot system, which is characterized in that
Be all provided at least one pressure sensor between the press machine and bearing plate, jack and liner plate, the pressure sensor with
Control circuit electrical connection.
6. buried concrete stray electrical current according to claim 1 and cyclical impact loading pilot system, which is characterized in that
The bearing plate lower end surface and liner plate front end face is evenly distributed with several convex blocks.
7. buried concrete stray electrical current according to claim 1 and cyclical impact loading pilot system, which is characterized in that
The control circuit is SCM Based circuit system.
8. the experimental method of buried concrete stray electrical current and cyclical impact loading pilot system, it is characterised in that: the ground
The experimental method of lower concrete stray electrical current and cyclical impact loading pilot system the following steps are included:
S1, concrete block is prefabricated, is prepared first according to the volume of experimental tank by concrete block to be detected, makes concrete to be detected
Block product is 30%-the 80% of experimental tank volume, then concrete block to be detected is placed into experimental tank and same with experimental tank
Axis distribution, and will be electrically connected between same reinforcing bar end positions in the connecting terminal and concrete block to be detected of same detection group
And initial resistivity value is detected, and graphite electrode plate, copper/saturated copper sulphate reference electrode are located in concrete block to be detected and reality
Position between check of foundation subsoil side wall, then take concrete block to be detected in actual use in natural environment peripheral position soil, so
Soil is filled in experimental tank and being coated on outside concrete block to be detected afterwards, compacting and water content tune then are carried out to soil
It is whole, make pressure and moisture content osmotic condition of the soil to concrete block to be detected and the soil ring in natural environment in actual use
Border is consistent, can the achievable loading to concrete block to be detected position, will finally complete concrete block to be detected
The experimental tank for loading positioning is installed in framework for support and is coaxially distributed between framework for support；
S2, experiment detection after completing the operation of S1 step, on the one hand drive liner plate to apply concrete block to be detected by jack
Add horizontal direction constant pressure, on the other hand drives bearing plate to pump by press machine first, by bearing plate
To in experimental tank concrete block to be detected apply vertical direction on alternating pressure, meanwhile, by the anode of potentiostat with
Reinforcing bar connection in concrete test block, cathode are connect with graphite electrode plate, are applied to the soil for coating concrete block to be detected
Stray electrical current is connected reference electrode current potential with copper/saturated copper sulphate reference electrode, to keep the constant of output factors electric current, most
After closing potentiostat afterwards, reinforcing bar current value is detected by ammeter, realizes and concrete block to be detected is carried out
Stray electrical current environment and cyclical impact loading and the load environment deposited carries out detection operation, and will test result and summarize to control electricity
Lu Zhong；
S3, data processing, the detection data result obtained by control circuit according to S2 step is foundation, on the one hand by pressure sensing
Device detection pressure value obtains the cyclical impact loading size and horizontal static load size that concrete block to be detected is subject to；On the other hand
According to resistance calculations formula:If the resistance measured has increase before starting compared with S1 arrangement, reinforcing bar starts to generate electricity
Chemical corrosion.
9. the experimental method of buried concrete stray electrical current according to claim 8 and cyclical impact loading pilot system,
It is characterized in that, applying stray electrical current work carrying out a potentiostat to concrete block to be detected in the S2 step
An ammeter is carried out after industry to detect reinforcing bar current value, constitutes a testing process, and to be detected in S2 step
Concrete block need to continuously implement repeated detection process, until concrete test block spalling,
Time interval is answered equal between potentiostat operation and ammeter detection in same testing process, and is basic with 1 hour
Unit.
10. the experimental method of buried concrete stray electrical current according to claim 8 and cyclical impact loading pilot system,
It is characterized in that, in S3 step, the resistance calculations formula:In,
R is resistance；
For resistivity；
To detect reinforcing bar length；
To detect bar cross section area.
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| CN201811570777.6A CN109855962B (en) | 2018-12-21 | 2018-12-21 | Underground concrete stray current and cyclic impact load test system and test method |
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| CN201811570777.6A CN109855962B (en) | 2018-12-21 | 2018-12-21 | Underground concrete stray current and cyclic impact load test system and test method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726629A (en) * | 2019-10-31 | 2020-01-24 | 河南理工大学 | Indoor test system and method for gas impact concrete test block |
| CN110823705A (en) * | 2019-10-31 | 2020-02-21 | 河南理工大学 | Indoor pressurization test device and method for bidirectional pressurization large-size concrete test block |
| CN111254995A (en) * | 2020-02-21 | 2020-06-09 | 中国矿业大学 | Pile foundation nondestructive real-time detection system and method based on potential signals |
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