CN208459245U - Bilateral corrosion type liner structure accelerated corrosion experimental rig - Google Patents
Bilateral corrosion type liner structure accelerated corrosion experimental rig Download PDFInfo
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- CN208459245U CN208459245U CN201821302633.8U CN201821302633U CN208459245U CN 208459245 U CN208459245 U CN 208459245U CN 201821302633 U CN201821302633 U CN 201821302633U CN 208459245 U CN208459245 U CN 208459245U
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Abstract
The utility model discloses a kind of bilateral corrosion type liner structure accelerated corrosion experimental rigs, including being set on the outside of liner structure and being case type corrosion sink, concentration sensor, pressure sensor, the first booster pump, the second booster pump, third booster pump, high concentration corrosive liquid storage tank, design concentration corrosive liquid storage tank, controller and salt fog cabinet, corrodes sink and salt fog cabinet is corroded inside and outside liner structure respectively.The utility model simultaneously constructs salt mist environment by constructing etchant solution environment on the outside of tunnel lining structure on the inside of liner structure simultaneously, realize the effect of the inside and outside bilateral of shield tunnel lining structure while accelerating corrosion, the time of day for the tunnel lining structure for being more nearly it in erosion environment, so as to more accurately study the erosion deterioration rule of tunnel lining structure under this condition, important support is provided accurately, scientifically to judge the safety and reliability in tunnel lining structure life cycle management.
Description
Technical field
The utility model relates to a kind of liner structure corrosion testing apparatus more particularly to a kind of bilateral corrosion type liner structures
Accelerated corrosion experimental rig.
Background technique
For the tunnel in erosion environment, liner structure is chronically in underground or subaqueous corrosion environment, lining cutting
Structure is inevitably by the various corrosion functions for corroding ion, wherein the harm with the erosion of chloride ion to concrete pipe sheet
It is maximum.It on the one hand, is outside in the upstream face of liner structure, chloride ion, which invades, reaches rebar surface inside concrete lining,
Concrete reinforcing steel Accelerated corrosion is caused after reaching a certain concentration, thus weaken the material property generation of tunnel lining structure,
Deterioration, and can further lead to Lining cracks, percolating water or even concrete cover peeling and section of jurisdiction chip off-falling phenomenon；It is another
Aspect is inside in the back side of tunnel lining structure, and salt fog enters tunnel internal and is attached to liner structure table when due to operation
Face, caused liner structure inside corrosion deterioration problem happen occasionally.It is corroded simultaneously inside and outside this tunnel lining structure bad
The phenomenon that change, seriously endangers tunnel operation and personnel safety.And the main collection of deterioration research is corroded for tunnel lining structure at present
In corroded or universe erosion research in unilateral side, have no that for liner structure two sides, to corrode deterioration in different ways simultaneously regular
Research.
The test method that accelerating corrosion is generally used for the deterioration law study of reinforced concrete structure, in tunnel-liner
In terms of structure accelerated corrosion deterioration test research, in existing indoor accelerated corrosion test, for being conducive to etchant solution and additional straight
Streaming system constitutes the considerations of power circuit, generallys use the experimental rig of immersion type, and test result is often presented as universe corruption
Lose deterioration feature, this and the especially seabed shield tunnel of tunnel-liner in Practical Project, outside by Cl-Ion, OH-Ion,
SO4 2-Ion etc. corrodes, the internal feature for being corroded deterioration simultaneously by the bilateral of the erosions such as salt fog simultaneously is there are larger difference, and mesh
The preceding experimental rig for being suitable for being used to carry out shield tunnel lining structure bilateral while corroding deterioration not yet, so being difficult to accurate mould
The quasi- practical corrosive effect for being chronically at underground or the liner structure in subaqueous corrosion environment.
Utility model content
The purpose of this utility model is that providing a kind of bilateral corrosion type liner structure to solve the above-mentioned problems adds
Fast corrosion testing apparatus.
The utility model achieves the above object through the following technical schemes:
A kind of bilateral corrosion type liner structure accelerated corrosion experimental rig, including be set on the outside of liner structure and be enclosed type
Corrosion sink, further include concentration sensor, pressure sensor, the first booster pump, the second booster pump, third booster pump, highly concentrated
Spend corrosive liquid storage tank, design concentration corrosive liquid storage tank, controller and salt fog cabinet, the concentration sensor and the pressure sensor
It is placed in the corrosion sink, the entrance of first booster pump passes through the outlet of liquid pipe and the design concentration corrosive liquid storage tank
The entrance of connection, the entrance of second booster pump and the third booster pump passes through liquid pipe and the high concentration corrosive liquid respectively
The outlet of storage tank connects, and the outlet of first booster pump, the outlet of second booster pump and the third booster pump go out
Mouth is connected by liquid pipe and the corrosion sink respectively, the outlet of second booster pump and going out for the third booster pump
Mouth respectively by liquid pipe and it is described corrode sink side wall and top plate be connected, the signal output end of the concentration sensor with
The signal output end of the pressure sensor is connect with the signal input part of the controller respectively, the control letter of the controller
Number output end respectively with the control signal input of first booster pump, the control signal input of second booster pump and
The control signal input of the third booster pump is correspondingly connected with；The inner surface that the salt fog cabinet is set to the liner structure is attached
Near position simultaneously sprays salt fog for the inner surface to the liner structure.
In above structure, corrosion sink is for storing corrosive liquid, generally salt water；Concentration sensor is rotten for real-time detection
The concentration of corrosive liquid in erosion sink simultaneously sends the concentration information to controller；Pressure sensor is for detecting in corrosion sink
Corrosive liquid pressure and send the pressure information to controller；First booster pump for that will design under the control of the controller
Design concentration in concentration corrosive liquid storage tank corrodes liquid pump to corroding sink；Second booster pump and third booster pump are for controlling
The high concentration in high concentration corrosive liquid storage tank is corroded into liquid pump to corroding sink under the control of device；Second booster pump and third pressurization
Liquid pipe between pump and corrosion sink is connected with the side wall of corrosion sink and top plate respectively, can be rotten to avoid high concentration is pumped into
Change corrosion sink internal corrosion liquid when losing liquid to the pressure of pressure sensor, to avoid the change of pressure sensor output signal
Change；Design concentration corrosive liquid storage tank is used to store the design concentration corrosive liquid that concentration is equal to accelerated corrosion experimental design concentration, with
Convenient for not changing corrosive liquid concentration when for increasing corrosion hydraulic coupling；High concentration corrosive liquid storage tank for store concentration be higher than plus
The high concentration corrosive liquid of fast corrosion test design concentration, in order to which the concentration that can increase corrosive liquid when needed is dense to designing
Degree；Controller for acquiring concentration sensor and pressure sensor information and control three booster pumps with this, with realize concentration and
The automatic adjustment of pressure；Salt fog cabinet is used to spray salt fog to the inner surface of liner structure, realizes the bilateral corrosion of liner structure
Effect.
Further, in order to be better achieved accelerated corrosion effect, at the outer surface and inner surface of the liner structure
It is respectively equipped with steel fabric sheet, the steel fabric sheet in outside is located at the bottom in the corrosion sink, the steel wire of inside
Piece between the salt fog cabinet and the liner structure, the steel fabric sheet of outside and inside respectively with current stabilization DC power supply
Cathode connection, in the liner structure close to the reinforcing bar of outside and inside respectively with the anode of the current stabilization DC power supply even
It connects.Current loop thus is respectively constituted in the outside of liner structure and inside, realizes accelerated corrosion effect.
The utility model has the beneficial effects that:
The utility model on the outside of tunnel lining structure by constructing etchant solution environment and while on the inside of liner structure
Salt mist environment is constructed, the effect of the inside and outside bilateral of shield tunnel lining structure while accelerating corrosion is realized, it is made to be more nearly place
The time of day of tunnel lining structure in erosion environment, so as to more accurately study tunnel-liner knot under this condition
The erosion of structure deteriorates rule, provides accurately, scientifically to judge the safety and reliability in tunnel lining structure life cycle management
Important support has research and probe meaning and engineering practical value.
Detailed description of the invention
Fig. 1 is the front view structure signal of bilateral corrosion type liner structure accelerated corrosion experimental rig described in the utility model
Figure.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, bilateral corrosion type liner structure accelerated corrosion experimental rig described in the utility model includes being set to lining
Build the outside of structure 15 and for case type corrosion sink 2, concentration sensor 12, pressure sensor 11, the first booster pump 5, the
Two booster pumps 4, third booster pump 3, high concentration corrosive liquid storage tank 7, design concentration corrosive liquid storage tank 8, controller 1, salt fog cabinet 9,
Steel fabric sheet 13, baffle 10 and current stabilization DC power supply 16, concentration sensor 12 and pressure sensor 11 are placed in corrosion sink 2,
The entrance of first booster pump 5 is connect by liquid pipe 6 with the outlet of design concentration corrosive liquid storage tank 8, the entrance of the second booster pump 4 with
The entrance of third booster pump 3 passes through liquid pipe 6 respectively and connect with the outlet of high concentration corrosive liquid storage tank 7, and the first booster pump 5 goes out
Mouth, the outlet of the second booster pump 4 and the outlet of third booster pump 3 pass through liquid pipe 6 respectively and are connected with corrosion sink 2, and second
The outlet of booster pump 4 and the outlet of third booster pump 3 are connected by liquid pipe 6 and the side wall and top plate of corrosion sink 2 respectively,
The signal output end of concentration sensor 12 and the signal output end of pressure sensor 11 connect with the signal input part of controller 1 respectively
It connects, the control with the control signal input of the first booster pump 5, the second booster pump 4 respectively of the control signal output of controller 1
The control signal input of signal input part and third booster pump 3 is correspondingly connected with；The outer surface and inside table of liner structure 15
Steel fabric sheet 13 is respectively equipped at face, salt fog cabinet 9 is set to the outside of the steel fabric sheet 13 of 15 inside of liner structure and for lining
The inner surface for building structure 15 sprays salt fog, and baffle 10 is set to the outside of the steel fabric sheet 13 of 15 inside of liner structure and for making
The salt fog sprayed in salt fog cabinet 9 is gathered in the inner surface of liner structure 15, and the steel fabric sheet 13 in outside is located in corrosion sink 2
Bottom, the steel fabric sheet 13 of outside and inside is connect with the cathode of current stabilization DC power supply 16 respectively, close in liner structure 15
The reinforcing bar 14 of outside and inside is connect with the anode of current stabilization DC power supply 16 respectively, thus in the medial and lateral of liner structure 15
It is respectively formed current loop, further realizes accelerated corrosion effect.
In order to further appreciate that the optimization technique effect of the utility model, below by taking preferred process for corrosion control as an example into
Row illustrates, but following methods and not exclusive control method, nor the protected object of the utility model.
As shown in Figure 1, the corrosion that bilateral corrosion type liner structure accelerated corrosion experimental rig described in the utility model uses
Control method, comprising the following steps:
Step 1: obtaining the reference hydraulic pressure P of 15 position of tunnel lining structure according to Practical Project*, liner structure 15
Chlorine ion concentration C in the corrosive liquid in outside1 *, the inside of liner structure 15 salt fog in chlorine ion concentration C2 *；
Step 2: selecting accelerator coefficient n according to the finding of Practical Project and experimental condition, then in accelerated corrosion test
Corrode hydraulic coupling P=nP*, chlorine ion concentration C in corrosive liquid1=nC1 *, chlorine ion concentration C in salt fog2=nC2 *；
Step 3: the pressure information for the corrosive liquid that controller 1 is detected according to pressure sensor 11, when the pressure of corrosive liquid
When lower than P, controller 1 controls the starting of the first booster pump 5, and the design concentration in design concentration corrosive liquid storage tank 8 is corroded liquid pump
Enter to corrode in sink 2, until the pressure of corrosive liquid is equal to P, closes the first booster pump 5；Controller 1 is according to concentration sensor
The concentration information of 12 corrosive liquids detected, when the concentration of corrosive liquid is lower than C1When, controller 1 controls the second booster pump 4 and the
Three booster pumps 3 start and the second booster pump 4 is identical with the flow velocity of third booster pump 3, will be highly concentrated in high concentration corrosive liquid storage tank 7
Degree corrosive liquid is pumped into corrosion sink 2, until the concentration of corrosive liquid is equal to C1Until, close the second booster pump 4 and third pressurization
Pump 3；Concentration of saline fog in salt fog cabinet 9 is directly set as C2, and according to actual tests need to salt fog spray rate and sprinkling when
Between realize that salt fog acts on corrosion function to liner structure 15.
The working principle of bilateral corrosion type liner structure accelerated corrosion experimental rig described in the utility model is as follows:
In marine environment, upstream face chloride ion is contacted with section of jurisdiction as a solution on the outside of liner structure section of jurisdiction, due to
The presence of hydraulic pressure is corroded and is mainly invaded inside section of jurisdiction by diffusion and osmosis, causes the corrosion of reinforcing bar；And in section of jurisdiction backwater
Face, chloride ion mainly exist in the form of salt fog, are adsorbed on section of jurisdiction inner surface, main to invade concrete by diffusion,
Cause the corrosion of reinforcing bar.
Osmosis refers to the process of that chloride ion is migrated with solution to inside concrete under the action of hydrostatic pressure.For
The porous materials such as concrete can describe pressure according to Darcy's law and act on the lower Percolation Law of liquid in the material:As it can be seen that in the case that other conditions are constant the unit time can be increased by way of increasing osmotic pressure
Etchant solution penetrates into the flow Q of concrete, to realize the accelerated corrosion of concrete pipe sheet.
Diffusion refers to free molecular flow or ion under concentration difference driving from high concentration region to the transition process of low concentration region.
Chloride ion spreads most basic foundation in concrete to be derived by diffusion equation based on Fick second law:Due to the initial chlorine ion concentration C of inside concrete0For definite value, convection current
Area depth delta x is basically unchanged, and the chloride diffusion coefficient D of concrete is immutable, then t moment is x away from concrete surface depth
The chlorine ion concentration C (x, t) at place mainly with concrete surface chlorine ion concentration CsIt is related, it can be dense by increasing surface chloride ion
The mode of degree improves chloride ion content in concrete, to accelerate corrosion function of the chloride ion to concrete.
Above-described embodiment is the preferred embodiment of the utility model, is not the limit to technical solutions of the utility model
System, as long as being regarded as falling into without the technical solution that creative work can be realized on the basis of the above embodiments
In the rights protection scope of the utility model patent.
Claims (2)
1. a kind of bilateral corrosion type liner structure accelerated corrosion experimental rig, including be set on the outside of liner structure and be case type
Corrode sink, it is characterised in that: further include concentration sensor, pressure sensor, the first booster pump, the second booster pump, third increasing
Press pump, high concentration corrosive liquid storage tank, design concentration corrosive liquid storage tank, controller and salt fog cabinet, the concentration sensor and described
Pressure sensor is placed in the corrosion sink, and the entrance of first booster pump passes through liquid pipe and the design concentration corrosive liquid
The outlet of storage tank connects, and the entrance of the entrance of second booster pump and the third booster pump passes through liquid pipe and the height respectively
The outlet of concentration corrosive liquid storage tank connects, the outlet of first booster pump, the outlet of second booster pump and the third
The outlet of booster pump passes through liquid pipe respectively and is connected with the corrosion sink, the outlet and the third of second booster pump
The outlet of booster pump is connected by liquid pipe and the side wall and top plate of the corrosion sink respectively, the letter of the concentration sensor
The signal output end of number output end and the pressure sensor is connect with the signal input part of the controller respectively, the control
The control signal output of device is believed with the control of the control signal input of first booster pump, second booster pump respectively
The control signal input of number input terminal and the third booster pump is correspondingly connected with；The salt fog cabinet is set to the liner structure
Inner surface neighbouring position simultaneously sprays salt fog for the inner surface to the liner structure.
2. bilateral corrosion type liner structure accelerated corrosion experimental rig according to claim 1, it is characterised in that: the lining
It builds and is respectively equipped with steel fabric sheet at the outer surface and inner surface of structure, the steel fabric sheet in outside is located at the corrosive water
Bottom in slot, the steel fabric sheet of inside is between the salt fog cabinet and the liner structure, the institute in outside and inside
It states steel fabric sheet to connect with the cathode of current stabilization DC power supply respectively, close to the reinforcing bar of outside and inside difference in the liner structure
It is connect with the anode of the current stabilization DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821302633.8U CN208459245U (en) | 2018-08-14 | 2018-08-14 | Bilateral corrosion type liner structure accelerated corrosion experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821302633.8U CN208459245U (en) | 2018-08-14 | 2018-08-14 | Bilateral corrosion type liner structure accelerated corrosion experimental rig |
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| Publication Number | Publication Date |
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| CN208459245U true CN208459245U (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821302633.8U Withdrawn - After Issue CN208459245U (en) | 2018-08-14 | 2018-08-14 | Bilateral corrosion type liner structure accelerated corrosion experimental rig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100293A (en) * | 2018-08-14 | 2018-12-28 | 西南交通大学 | Bilateral corrosion type liner structure accelerated corrosion experimental rig and process for corrosion control |
-
2018
- 2018-08-14 CN CN201821302633.8U patent/CN208459245U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100293A (en) * | 2018-08-14 | 2018-12-28 | 西南交通大学 | Bilateral corrosion type liner structure accelerated corrosion experimental rig and process for corrosion control |
| CN109100293B (en) * | 2018-08-14 | 2022-02-01 | 西南交通大学 | Accelerated corrosion test device for bilateral corrosion type lining structure and corrosion control method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190201 Effective date of abandoning: 20220201 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190201 Effective date of abandoning: 20220201 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |