CN107101876B - Concrete slab corrosion deterioration test devices and methods therefor under complexing action - Google Patents
Concrete slab corrosion deterioration test devices and methods therefor under complexing action Download PDFInfo
- Publication number
- CN107101876B CN107101876B CN201710478152.6A CN201710478152A CN107101876B CN 107101876 B CN107101876 B CN 107101876B CN 201710478152 A CN201710478152 A CN 201710478152A CN 107101876 B CN107101876 B CN 107101876B
- Authority
- CN
- China
- Prior art keywords
- steel plate
- isolation ward
- tension
- pressure
- compression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/024—Corrosive
Abstract
The invention discloses concrete slab corrosion deterioration test device and methods under a kind of complexing action, the device applies constant drawing, compression to panel test specimen by forward and reverse pretightning force, it seals high pressure attack solution and applies high hydraulic pressure and the effect of high hydraulic gradient, and provide the frictional force that panel is born using bed course rubbing device.The device is divided into seal box, isolation ward and corrosion room, and seal box seals high pressure attack solution, and shielded box is used to protect sensor, loading axis etc. that solution is avoided to corrode and as the counterforce device that tensile stress applies, and corrosion room limits infiltration lane.Roller bearing balances the horizontal pressure force of load bar all by frictional force between bed course block and panel test specimen, and test specimen three-dimensional stress, bed course frictional force and attack solution pressure size are monitored by pressure sensor and hydraulic pressure sensor, and keep pretightning force, frictional force, solution pressure steady in a long-term by secondary screw with the method for make-up solution.It can provide one or more of infiltration corrosion environment such as sulfate, villaumite in seal box.
Description
Technical field
The invention belongs to modelling technique field, in particular to concrete slab corrosion deterioration examination under a kind of complexing action
Experiment device and its method.
The present invention relates to concrete slab corrosion deterioration test method and device thereof under complexing action, especially a kind of mould
Quasi- concrete slab complex stress condition bears the aggressivities such as sulfate, villaumite under the effect of bed course frictional force and high hydraulic gradient
The experimental rig and method of solution infiltration corrosion.
Background technique
Concrete for hydraulic structure is a kind of porous media material, and stress state and its void ratio are closely bound up.It is smaller in compression
When, the inside concrete closing of pores, when compression is larger, hole opens.When bearing pulling force effect, internal void can open, hole
Gap is than increasing.Concrete slab is as leakage preventing structure in earth and rockfill dam, stone masonry dam, the seepage control system of RCC dam and its reinforcing
It is widely used in engineering.Stress state is complicated, and the panel intermediate pressurised on usual high concrete panel dam, both ends are pressurized, and
It is acted on by bed course frictional force.Concrete slab is acted on by ambient water for a long time, erosion carbon dioxide such as sulfate radical, chloride ion etc. in water
Reacting with hydrolysis product of cement makes it lose gelling and generates deterioration, and concrete strength is caused to reduce, panel bearing capacity
Decline, it is serious also to threaten dam safety.Therefore, research concrete slab is in drawing, compression-bed course friction-high hydraulic gradient
Corrosion deterioration performance under degree coupling is run to dam safety and panel durability evaluation is of great significance.
Carrying out both at home and abroad relatively large number of is that concrete under unidirectional tensile, compressive, bending song load-chemical erosion coupling is molten
Deterioration test is lost, it is molten under drawing, compression, bed course friction and high hydraulic gradient coupling specifically for concrete slab
Erosion deterioration performance study is relatively fewer.How tension and compression stress, bed course frictional force and attack solution are applied to concrete slab test specimen
High hydraulic gradient effect is the key points and difficulties of indoor dissolved corrosion test.When applying the effect of horizontal direction pressure to bed course, how to make
Frictional force is balanced therewith without being that can test by counter-force bracket and the permeable stone frictional influence of bed course bottom between bed course and test specimen
Capable key.Also, conventional three-dimensional tension and compression load is loaded using jack hydraulic, but cannot provide load steady in a long-term, is filled
It sets at high cost.Counterweight and spring loads cannot reach the high stress level wanted, and device is heavy, it has not been convenient to.
Summary of the invention
In order to realize infiltration of the simulation concrete panel under the effect of pressure, bed course frictional force and high hydraulic gradient indoors
Saturating dissolved corrosion test, the present invention provide concrete slab corrosion deterioration test devices and methods therefor under a kind of complexing action, the device
And its method can provide bed course friction steady in a long-term and three-dimensional stress Effect study attack solution to the shadow of concrete slab performance
It rings.
To achieve the above object, the technical solution adopted by the present invention are as follows:
Concrete slab corrosion deterioration test device under a kind of complexing action, including sealing room, isolation ward and corrosion room, institute
It states sealing interior and is provided with isolation ward, corrosion room is provided in isolation ward；
The corrosion room includes high elastic rubber pipe 2, the pedestal 8 that is arranged from bottom to top in high elastic rubber pipe 2, under it is permeable
Stone 9, steel ball track 11, stainless shot 10, bed course block 12, concrete slab test specimen 1 and upper dankness stone 15, pedestal 8 are installed on close
It seals on room bottom plate 19；
Described 12 two opposite side walls of outer high elastic rubber pipe of concrete slab test specimen are tension face, the concrete surface
1 other two opposite side wall of outer high elastic rubber pipe 2 of plate test specimen is compression face, and tension face is provided with tension steel plate 3 and pulling force
Bolt 22, described 22 one end of stress bolt pass through tension steel plate 3 and resist concrete slab test specimen 1, the other end resist tension side every
From room steel plate 16, tension sensor 24 is installed on the stress bolt 22, the compression face connects pressure by mild steel bed course 4
Steel plate 5, the pressure steel plate 5 are fixed on mild steel bed course 4 by compression bolts 6, and pressure biography is equipped on the compression bolts 6
Sensor 7；
The isolation ward includes tension side isolation ward steel plate 16 and compression-side isolation ward steel plate 25, the tension side isolation ward
The bottom of steel plate 16 and compression-side isolation ward steel plate 25 is fixed on sealing room bottom plate 19, and is located at tension face and compression face
It is outer that the top of outside, tension side isolation ward steel plate 16 and compression-side isolation ward steel plate 25 is separately connected 2 top of high elastic rubber pipe
Wall forms confined space between tension side isolation ward steel plate 16, compression-side isolation ward steel plate 25 and high elastic rubber pipe 2；
The sealing room includes that top is provided with water inlet, hydraulic pressure sensor 29 and built-in axis pressure load bar sensor 36
Axis presses load bar 34,
Wherein: pressurization lid is provided at the top of the upper dankness stone 15, position and the axis of the pressurization lid press 34 phase of load bar
It is corresponding, it is provided with corrosion room drainpipe on the corresponding sealing room bottom plate 19 in corrosion room, seals outdoor corresponding sealing room bottom plate 19
On be provided with seal box drainpipe.
Further, the sealing room includes sealing room side wall 21, the sealing room side wall 21 and sealing ceiling plate 35
Joint is provided with seal box water stop rubber 32, and the axis pressure load bar 34 passes through sealing ceiling plate 35 and protrudes into sealing room, sealing
Axial load water stop rubber 38, the inserting end peripheral hardware of the axis pressure load bar 34 are provided between ceiling plate 35 and axis pressure load bar 34
It is equipped with axial load protective shell 37.
Further, the bed course block 12 is provided with frictional force loading axis 13, institute along the side that stainless shot 10 moves
It states and frictional force load bar sensor 33 is installed in frictional force loading axis 13, the frictional force loading axis 13 passes through load bracket 14
It is fixed on sealing room bottom plate 19.
Further, the tension side isolation ward steel plate 16, compression-side isolation ward steel plate 25 respectively with high elastic rubber pipe 2
Top exterior walls connect, and 2 inside top of high elastic rubber pipe is equipped with a groove, is provided with steel plate for sealing water in the groove, recessed
Slot has been arranged inside and outside water stop rubber 27, the water stop rubber 27, high elastic rubber pipe 2 and steel plate for sealing water by screw 26 respectively with
Tension side isolation ward steel plate 16, compression-side isolation ward steel plate 25 are fixed.
Further, the outside top of the tension side isolation ward steel plate 16 passes through the connection sealing room side wall of transmission rod 20
21, the tension side isolation ward steel plate 16, compression-side isolation ward steel plate 25 bottom respectively sealing room bottom plate 9 between be provided with
Bottom surface water stop rubber 17, and it is fixed by bottom surface bolt 18.
Further, it is provided with water inlet valve 28 on the water inlet, is provided with corrosion on the drainpipe of the corrosion room
Room water discharging valve 31 is provided with sealing room water discharging valve 30 on the drainpipe of the sealing room.
Further, the junction of the stress bolt 22 and tension side isolation ward steel plate 16 is provided with roller bearing 23.
Further, the tension face of the high elastic rubber pipe is provided with preformed hole, is equipped with pulling force in the preformed hole
By structure gluing knot, the compression face of the high elastic rubber pipe is logical for steel plate 3, the tension steel plate 3 and concrete slab test specimen 1
Cross structure gluing knot mild steel bed course 4.
Further, be passed through attack solution by sealing the water inlet of room, the attack solution be sodium sulphate, magnesium sulfate,
The mixed liquor of any one or a few solution in sodium chloride, magnesium chloride.
A kind of concrete slab corrosion deterioration test method under complexing action, comprising the following steps:
The first step, attack solution calculation of pressure；
Second step, compression bolts and stress bolt intensity requirement calculate；
Third step seals concrete sample, coats first in the compression face for the concrete standard test specimen 1 for pouring and having conserved
Latex, and sealed outside concrete standard test specimen 1 using high elastic rubber pipe 2；After sealing, in the high elastic rubber of tension face
Reserved opening, and smearing structure glue are cut on pipe 2, tension steel plate 3 is pasted on concrete slab test specimen 1, reach bonding to it
After intensity, in the high elastic rubber pipe external pasting mild steel bed course 4 of compression face, the application pressing force steel plate 5 on mild steel bed course 4 is being pressed
Equal prepared screw-bolt hole on power steel plate 5, tension steel plate 3；It limits seepage channel and flows to bottom from the top of concrete standard test specimen 1；
4th step, positive pretightning force apply: passing through the bolt hole in pressure steel plate 5 using compression bolts 6, and screw pressure
Bolt 6 applies compression to concrete standard test specimen 1, and prestressing force size is monitored by pressure sensor 7, until specifying lotus
It carries；
5th step assembles pedestal and installs concrete standard test specimen: permeable stone 9 under installing on pedestal 8, lower permeable stone 9
Upper several rows of installation are internally provided with the steel ball track 11 of stainless shot 10, install bed course block 12 on stainless shot 10, and padding
The side installation frictional force loading axis 13 of layer block 12 and the load bracket 14 for being used to support frictional force loading axis 13, concrete standard
Upper dankness stone 15 is installed, pedestal 8 is installed on sealing room bottom plate 19 at the top of test specimen 1；
6th step installs tension side isolation ward steel plate: installation tension side isolation ward steel plate 16, and uses bottom surface water stop rubber
17 and bottom surface bolt 18 be fixed on sealing room bottom plate 19, force transmission rack 20 is welded to tension side isolation ward steel plate 16 and close
Between joint sealing side wall 21；
7th step applies reversed pretightning force and frictional force: one end is welded on the pulling force on tension side isolation ward steel plate 16
Bolt 22 passes through the threaded hole on tension steel plate 3, and screws stress bolt 22 and apply pulling force to tension steel plate 3, applies reversed pre-
Clamp force is to designated value；Then, by the frictional force in the vertical tension direction of the application of frictional force loading axis 13 horizontal direction to designated value, and
Frictional force size is monitored by tension sensor 24；
8th step is installed compression-side isolation ward steel plate and is sealed: installation compression-side isolation ward steel plate 25, by concrete standard
Test specimen 1, pedestal and frictional force load bracket 14 are enclosed in isolation ward, and pass through high resiliency rubber at the top of the fixed isolation ward of screw 26
Sebific duct 2, steel plate for sealing water and water stop rubber 27, isolation ward inside are isolated with the sealing room of external attack solution；
9th step injects attack solution: it opens and seals ceiling portion water inlet valve 28, injection testing attack solution, and
Pressurization, the monitoring of hydraulic pressure sensor 29 seals indoor solution pressure, until reaching the high hydraulic gradient of needs；
Tenth step, make-up solution pressure and pretightning force: when hydraulic pressure sensor 29 monitors to seal indoor solution pressure loss
More than setting value, then attack solution, make-up solution pressure, if isolation room pressure, pulling force spiral shell are injected by water inlet valve 28
The loss of bolt pretightning force is more than that setting value opens seal box water discharging valve 30, releases attack solution, opens sealing room, uses torque wrench
Pressure, stress bolt supplement pretightning force are adjusted to designated value, is then sealed, is refilled attack solution and continue dissolved corrosion test.
Compared with prior art, the invention has the following advantages:
1. a kind of drawing provided by the invention, the high hydraulic gradient coupling concrete slab corrosion deterioration test of compression-
Device can be continuously applied pressure and bed course frictional force to panel, and can provide high hydraulic gradient erosion environment, can be convenient
Carry out concrete slab corrosion deterioration test.
2. bed course block is arranged under panel test specimen, the contact condition and mutual rubbing action of simulated panel and bed course can
Reflect the corrosion of concrete slab under engineering virtual condition.
3. long term constant compression can be applied to bed course block using press rods and bracket, and pass through load bar protective shell and close
Envelope room separates it with external corrosion solution, prevents from causing compression decaying too fast due to solution corrosion, and pass by pressure
Sensor monitors frictional force attenuation, when exceeding allowed band, carries out supplement frictional force.
4. stainless shot and two tracks are arranged, between bed course block and permeable stone for reducing bed course and bottom permeable stone
Between frictional force, make between concrete slab test specimen and bed course block rub balance press rods application horizontal force, increase test essence
Degree.
5. tension side isolation ward steel plate is both used as reaction frame, reversed pretightning force is provided in high-strength bolt to apply to panel test specimen
Add pulling force, and roller bearing track is set and does not limit direction displacement, the horizontal force for applying frictional force load bar is whole
By the dynamic balance that rubs between bed course block and test specimen, test accuracy is improved, guarantees that frictional force smoothly loads.
5. the concrete slab that the present apparatus can carry out under different three-dimensional pressures, frictional force and the effect of high hydraulic gradient is molten
Corrosion test can adjust high-strength bolt pretightning force size and the axis pressure size stress shape different with simulated panel test specimen as needed
State adjusts load bar pressure size to apply different size of frictional force, by control solution pressure size to apply different water
Force gradient.
6. by providing different solutions in seal box, three-dimensional pressure-bed course frictional force-Gao Shui is may be implemented in the present apparatus
Force gradient-sulfate attack coupling, the high hydraulic gradient of three-dimensional pressure-bed course frictional force-- chloride erosion coupling, three-dimensional tension and compression
The high hydraulic gradient of power-bed course frictional force-- corrosion coupling and three-dimensional pressure-bed course frictional force-a variety of chemistry of high hydraulic gradient-
Effect couples lower concrete slab deterioration test.
So author designed is a kind of not only can be kept for a long time different pressures but also can provide different hydraulic gradients and difference
The technical good and economic device of chemical erosion material effect.The device can provide simultaneously long term constant pressure effect,
High hydraulic gradient effect and chemical erosion effect, can also adjust different directions stress intensity, stress level, frictional force as needed
Size, hydraulic gradient and chemical action are horizontal.
Detailed description of the invention
The structural schematic diagram of Fig. 1 tension side of the present invention；
Fig. 2 is the partial structurtes enlarged drawing in Fig. 1；
The structural schematic diagram of Fig. 3 compression-side of the present invention；
Fig. 4 is the partial structurtes enlarged drawing in Fig. 3；
Wherein: 1- concrete slab test specimen, 2- high elastic rubber pipe, 3- tension steel plate, 4- mild steel bed course, 5- pressure steel
Plate, 6- compression bolts, 7- pressure sensor, 8- pedestal, permeable stone under 9-, 10- stainless shot, 11 steel ball tracks, 12- bed course
Block, 13- frictional force loading axis, 14- load bracket, 15- upper dankness stone, 16- tension side isolation ward steel plate, the bottom surface 17- sealing rubber
Skin, the bottom surface 18- bolt, 19- sealing room bottom plate, 20- transmission rod, 21- sealing room side wall, 22- stress bolt, 23- roller bearing,
24- tension sensor, 25- compression-side isolation ward steel plate, 26- screw, 27- water stop rubber, 28- water inlet valve, 29- hydraulic pressure pass
Sensor, 30- seal room water discharging valve, 31- corrosion room water discharging valve, and 32- seals room water stop rubber, and 33- frictional force load bar passes
Sensor, 34- axis press load bar, and 35- seals ceiling plate, and 36- axis presses load bar sensor, 37- axial load protective shell, 38- axis pressure
Bar water stop rubber.
Specific embodiment
Below with reference to embodiment, the present invention will be further explained.
As shown in Figs 1-4, concrete slab corrosion deterioration test device under a kind of complexing action, including sealing room, isolation
Room and corrosion room, the sealing interior are provided with isolation ward, corrosion room are provided in isolation ward；
The corrosion room includes high elastic rubber pipe 2, the pedestal 8 that is arranged from bottom to top in high elastic rubber pipe 2, under it is permeable
Stone 9, steel ball track 11, stainless shot 10, bed course block 12, concrete slab test specimen 1 and upper dankness stone 15, pedestal 8 are installed on close
It seals on room bottom plate 19；
Described 12 two opposite side walls of outer high elastic rubber pipe of concrete slab test specimen are tension face, the concrete surface
1 other two opposite side wall of outer high elastic rubber pipe 2 of plate test specimen is compression face, and tension face is provided with tension steel plate 3 and pulling force
Bolt 22, described 22 one end of stress bolt pass through tension steel plate 3 and resist concrete slab test specimen 1, the other end resist tension side every
From room steel plate 16, tension sensor 24 is installed on the stress bolt 22, the compression face connects pressure by mild steel bed course 4
Steel plate 5, the pressure steel plate 5 are fixed on mild steel bed course 4 by compression bolts 6, and pressure biography is equipped on the compression bolts 6
Sensor 7；
The isolation ward includes tension side isolation ward steel plate 16 and compression-side isolation ward steel plate 25, the tension side isolation ward
The bottom of steel plate 16 and compression-side isolation ward steel plate 25 is fixed on sealing room bottom plate 19, and is located at tension face and compression face
It is outer that the top of outside, tension side isolation ward steel plate 16 and compression-side isolation ward steel plate 25 is separately connected 2 top of high elastic rubber pipe
Wall forms confined space between tension side isolation ward steel plate 16, compression-side isolation ward steel plate 25 and high elastic rubber pipe 2；
The sealing room includes that top is provided with water inlet, hydraulic pressure sensor 29 and built-in axis pressure load bar sensor 36
Axis presses load bar 34,
Wherein: pressurization lid is provided at the top of the upper dankness stone 15, position and the axis of the pressurization lid press 34 phase of load bar
It is corresponding, it is provided with corrosion room drainpipe on the corresponding sealing room bottom plate 19 in corrosion room, seals outdoor corresponding sealing room bottom plate 19
On be provided with seal box drainpipe.
The sealing room includes sealing room side wall 21, and the sealing room side wall 21 and the joint for sealing ceiling plate 35 are arranged
Have a seal box water stop rubber 32, the axis pressure load bar 34 passes through sealing ceiling plate 35 and protrudes into sealing room, sealing ceiling plate 35 with
It is provided with axial load water stop rubber 38 between axis pressure load bar 34, is provided with axial load outside the inserting end of the axis pressure load bar 34
Protective shell 37.
The bed course block 12 is provided with frictional force loading axis 13 along the side that stainless shot 10 moves, and the frictional force adds
It carries and frictional force load bar sensor 33 is installed on axis 13, the frictional force loading axis 13 is fixed on sealing by loading bracket 14
On room bottom plate 19.
The tension side isolation ward steel plate 16, compression-side isolation ward steel plate 25 are respectively and outside the top of high elastic rubber pipe 2
Wall connects, and 2 inside top of high elastic rubber pipe is equipped with a groove, is provided with steel plate for sealing water, peripheral hardware in groove in the groove
Be equipped with water stop rubber 27, the water stop rubber 27, high elastic rubber pipe 2 and steel plate for sealing water by screw 26 respectively with tension side every
Fixed from room steel plate 16, compression-side isolation ward steel plate 25, isolation ward is by water stop rubber 27 and steel plate for sealing water collective effect, to protect
Card attack solution does not enter isolation ward, to protect drawing, compression bolts and its corresponding sensor.
The outside top of the tension side isolation ward steel plate 16 passes through the connection sealing room side wall 21 of transmission rod 20, the tension
Side isolation ward steel plate 16, compression-side isolation ward steel plate 25 bottom respectively sealing room bottom plate 9 between be provided with bottom surface sealing rubber
Skin 17, and it is fixed by bottom surface bolt 18.
It is provided with water inlet valve 28 on the water inlet, corrosion room water discharging valve is provided on the drainpipe of the corrosion room
31, sealing room water discharging valve 30 is provided on the drainpipe of the sealing room.
The junction of the stress bolt 22 and tension side isolation ward steel plate 16 is provided with roller bearing 23.
The tension face of the high elastic rubber pipe is provided with preformed hole, and tension steel plate 3 is equipped in the preformed hole, described
By structure gluing knot, the compression face of the high elastic rubber pipe passes through structure gluing for tension steel plate 3 and concrete slab test specimen 1
Tie mild steel bed course 4.
Water inlet by sealing room is passed through attack solution, and the attack solution is sodium sulphate, magnesium sulfate, sodium chloride, chlorine
Change the mixed liquor of any one or a few solution in magnesium.
The present invention can carry out complex stress condition and high hydraulic gradient to simulation concrete panel test specimen actual working state
The lower corrosion deterioration test of effect, by forward and reverse pretightning force to concrete slab test specimen application drawing, pressure, bed course frictional force and
High pressure attack solution permeates corrosion..
After tension side isolation ward steel plate 16 is fixed in bottom, it is possible to provide counter-force, therefore be referred to as to play the role of reaction frame.By
Isolation ward steel plate in side is drawn on the one hand to be used to separate attack solution, on the other hand the reaction frame as reversed pretightning force, inside connection
Tension side high-strength bolt, external connection transmission rod, and connected using welding manner, increase tension side isolation ward steel plate rigidity, leads to
Reversed pretightning force self-balancing in seal box can be made by crossing two sides transmission rod, increase pressure panel dissolution systems rigidity.Tension side
Two panels sealing steel plate mutually supports, and makes structure remained stable.
It is equipped with roller bearing in tension side isolation ward steel plate, roller bearing branch is set in conjunction with bed course block bottom and bed course block bottom
Seat, can move freely test specimen without constraint, in direction, guarantee frictional force load bar horizontal force all by bed course block with
Frictional force balances between panel test specimen, ensure that effective application of bed course frictional force.
The invention discloses concrete slab corrosion deterioration test device and method, the devices under a kind of complexing action to pass through
Forward and reverse pretightning force applies constant drawing, compression to panel test specimen, and sealing high pressure attack solution applies high hydraulic pressure and Gao Shuili
Gradient effect, and the frictional force that panel is born is provided using bed course rubbing device.The device is divided into seal box, isolation ward and molten
Room is lost, seal box seals high pressure attack solution, and shielded box is used to protect sensor, loading axis etc. that solution is avoided to corrode and as drawing
The counterforce device that stress applies, corrosion room limit infiltration lane.Roller bearing makes the horizontal pressure force of load bar all by bed course block
Frictional force is between panel test specimen to balance, and is rubbed by pressure sensor and hydraulic pressure sensor monitoring test specimen three-dimensional stress, bed course
Power and attack solution pressure size are wiped, and pretightning force, frictional force, solution are kept by secondary screw with the method for make-up solution
Pressure is steady in a long-term.It can provide one or more of infiltration corrosion environment such as sulfate, villaumite in seal box.
A kind of concrete slab corrosion deterioration test method under complexing action, comprising the following steps:
The first step, attack solution calculation of pressure:
It is assumed that required hydraulic gradient is 100, the concrete for hydraulic structure test specimen used in the present embodiment is standard specimen, ruler
Very little is 150 × 150 × 150mm, thus can calculate head at the top of concrete sample are as follows: h=150 × 100 × 10-3=15m,
Pressure at the top of test specimen are as follows: P=15 × 1000 × 10=0.15MPa；
It follows that sealing indoor solution pressure is 0.15MPa when hydraulic gradient is 100.
Second step, compression bolts and stress bolt intensity requirement calculate:
It is assumed that required horizontal direction is drawn, compression 1MPa, then pressure is A=1 × 10 f=σ6×150×150×10-6=22.5KN
There are four high-strength bolts, the then drawing that every pressure or stress bolt are born on every piece of tension steel plate and pressure steel plate
Power or pressure are 5.625KN, therefore, required 8.8 stage pressure or pulling force high-strength bolt minimum diameter are as follows:
It is drawn in view of pressure or stress bolt need to install pressure, force snesor, therefore selects diameter 10mm8.8 grades of high-strength bolt
Pulling force, pressure steel plate horizontal direction 1MPa pressure requirements can be met, similarly, it is high-strength that 10mm8.8 grades of selection of axis pressure load bar can be obtained
Bolt can also be met the requirements.
Third step seals concrete sample, coats first in the compression face for the concrete standard test specimen 1 for pouring and having conserved
Latex, and sealed outside concrete standard test specimen 1 using high elastic rubber pipe 2；After sealing, in the high elastic rubber of tension face
The rectangular reserved opening of 150 × 150mm, and smearing structure glue are cut on pipe 2, and tension steel plate 3 is pasted onto concrete slab test specimen 1
On, after it reaches adhesion strength, mild steel bed course 4 is pasted using latex outside the high elastic rubber pipe of compression face, in mild steel pad
Application pressing force steel plate 5 on layer 4, the equal prepared screw-bolt hole on pressure steel plate 5, tension steel plate 3；Seepage channel is limited from concrete mark
Bottom is flowed at the top of quasi- test specimen 1；Each tension face is provided with four groups of stress bolts 22 up and down, and each compression face is provided with
Four groups of lower left and right compression bolts 6,
4th step, positive pretightning force apply: passing through the bolt hole of pressure steel plate 5 using compression bolts 6, and screw pressure spiral shell
Bolt 6 applies compression to concrete standard test specimen 1, and prestressing force size is monitored by pressure sensor 7, until specifying load；
5th step assembles pedestal and installs concrete standard test specimen: permeable stone 9 under installing on pedestal 8, lower permeable stone 9
The upper two rows of rows of installation are internally provided with the steel ball track 11 of stainless shot 10, install bed course block 12 on stainless shot 10, and padding
The side installation frictional force loading axis 13 of layer block 12 and the load bracket 14 for being used to support frictional force loading axis 13, load bracket 14
Bottom is fixed on sealing room bottom plate 19, and upper dankness stone 15 is installed at the top of concrete standard test specimen 1, and pedestal 8 is installed on sealing room
On bottom plate 19；
6th step installs tension side isolation ward steel plate: installation tension side isolation ward steel plate 16, and uses bottom surface water stop rubber
17 and bottom surface bolt 18 be fixed on sealing room bottom plate 19, force transmission rack 20 is welded to tension side isolation ward steel plate 16 and close
Between joint sealing side wall 21；
7th step applies reversed pretightning force and frictional force: one end is welded on the pulling force on tension side isolation ward steel plate 16
Bolt 22 passes through the threaded hole on tension steel plate 3, and screws stress bolt 22 and apply pulling force to tension steel plate 3, applies reversed pre-
Clamp force is to designated value；Then, by the frictional force in the vertical tension direction of the application of frictional force loading axis 13 horizontal direction to designated value, and
Frictional force size is monitored by tension sensor 24；
8th step is installed compression-side isolation ward steel plate and is sealed: installation compression-side isolation ward steel plate 25, by concrete standard
Test specimen 1, pedestal and frictional force load bracket 14 are enclosed in isolation ward, and pass through high resiliency rubber at the top of the fixed isolation ward of screw 26
Sebific duct 2, steel plate for sealing water and water stop rubber 27, isolation ward inside are isolated with the sealing room of external attack solution, prevent prestressing force spiral shell
Bolt corrodes and leads to pretightning force loss and pressure, stress bolt and its internal drawing, pressure sensor failure；
9th step injects attack solution: it opens and seals ceiling portion water inlet valve 28, injection testing attack solution, and
Pressurization, the monitoring of hydraulic pressure sensor 29 seals indoor solution pressure, until reaching the high hydraulic gradient of needs；
Tenth step, make-up solution pressure and pretightning force: when hydraulic pressure sensor 29 monitors to seal indoor solution pressure loss
More than setting value, then attack solution, make-up solution pressure, if isolation room pressure, pulling force spiral shell are injected by water inlet valve 28
The loss of bolt pretightning force is more than that setting value opens seal box water discharging valve 30, releases attack solution, opens sealing room, uses torque wrench
Pressure, stress bolt supplement pretightning force are adjusted to designated value, is then sealed, is refilled attack solution and continue dissolved corrosion test.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. concrete slab corrosion deterioration test device under a kind of complexing action, it is characterised in that:
It is provided with isolation ward, corrosion room is provided in isolation ward including sealing room, isolation ward and corrosion room, the sealing interior；
The corrosion room includes high elastic rubber pipe (2), the pedestal (8) that is arranged from bottom to top in high elastic rubber pipe (2), lower
Water stone (9), steel ball track (11), stainless shot (10), bed course block (12), concrete slab test specimen (1) and upper dankness stone (15),
Pedestal (8) is installed in sealing room bottom plate (19)；
Described outer (2) two opposite side walls of high elastic rubber pipe of concrete slab test specimen (1) are tension face, the concrete surface
Outer other two the opposite side wall of high elastic rubber pipe (2) of plate test specimen (1) is compression face, and tension face is provided with tension steel plate (3)
With stress bolt (22), described stress bolt (22) one end passes through tension steel plate (3) and resists concrete slab test specimen (1), another
End resists tension side isolation ward steel plate (16), is equipped with tension sensor (24), the compression face on the stress bolt (22)
Pressure steel plate (5) are connected by mild steel bed course (4), the pressure steel plate (5) is fixed on mild steel bed course by compression bolts (6)
(4) on, pressure sensor (7) are installed on the compression bolts (6)；
The isolation ward includes tension side isolation ward steel plate (16) and compression-side isolation ward steel plate (25), the tension side isolation ward
The bottom of steel plate (16) and compression-side isolation ward steel plate (25) be fixed on sealing room bottom plate (19) on, and be located at tension face and
On the outside of compression face, high elastic rubber is separately connected at the top of tension side isolation ward steel plate (16) and compression-side isolation ward steel plate (25)
(2) top exterior walls are managed, between tension side isolation ward steel plate (16), compression-side isolation ward steel plate (25) and high elastic rubber pipe (2)
Form confined space；
The sealing room includes that top is provided with water inlet, hydraulic pressure sensor (29) and built-in axis pressure load bar sensor (36)
Axis presses load bar (34),
Wherein: pressurization lid is provided at the top of the upper dankness stone (15), position and the axis of the pressurization lid press load bar (34) phase
It is corresponding, it is provided with corrosion room drainpipe on the corresponding sealing room bottom plate (19) in corrosion room, seals outdoor corresponding sealing room bottom plate
(19) seal box drainpipe is provided on；
The outside top of the tension side isolation ward steel plate (16) by transmission rod (20) connection sealing room side wall (21), it is described by
The bottom of side isolation ward steel plate (16), compression-side isolation ward steel plate (25) is drawn to be provided with bottom between sealing room bottom plate (19) respectively
Face water stop rubber (17), and it is fixed by bottom surface bolt (18)；
The junction of the stress bolt (22) and tension side isolation ward steel plate (16) is provided with roller bearing (23).
2. concrete slab corrosion deterioration test device under complexing action according to claim 1, it is characterised in that: described
Sealing room includes sealing room side wall (21), and sealing room side wall (21) and the joint for sealing ceiling plate (35) are provided with sealing
Case water stop rubber (32), axis pressure load bar (34) pass through sealing ceiling plate (35) and protrude into sealing room, seal ceiling plate (35)
It is provided with axial load water stop rubber (38) between axis pressure load bar (34), is arranged outside the inserting end of axis pressure load bar (34)
There are axial load protective shell (37).
3. concrete slab corrosion deterioration test device under complexing action according to claim 1, it is characterised in that: described
Bed course block (12) is provided with frictional force loading axis (13) along the side that stainless shot (10) moves, the frictional force loading axis
(13) frictional force load bar sensor (33) is installed, the frictional force loading axis (13) is fixed on by loading bracket (14) on
It seals on room bottom plate (19).
4. concrete slab corrosion deterioration test device under complexing action according to claim 1, it is characterised in that: described
Tension side isolation ward steel plate (16), compression-side isolation ward steel plate (25) connect with the top exterior walls of high elastic rubber pipe (2) respectively,
And high elastic rubber pipe (2) inside top is equipped with a groove, is provided with steel plate for sealing water in the groove, groove has been arranged inside and outside only
Water rubber (27), the water stop rubber (27), high elastic rubber pipe (2) and steel plate for sealing water by screw (26) respectively with tension side
Isolation ward steel plate (16), compression-side isolation ward steel plate (25) are fixed.
5. concrete slab corrosion deterioration test device under complexing action according to claim 1, it is characterised in that: described
It is provided on water inlet water inlet valve (28), corrosion room water discharging valve (31) is provided on the drainpipe of the corrosion room, it is described
Sealing room water discharging valve (30) is provided on sealing room drainpipe.
6. concrete slab corrosion deterioration test device under complexing action according to claim 1, it is characterised in that: described
The tension face of high elastic rubber pipe is provided with preformed hole, and tension steel plate (3), the tension steel plate are equipped in the preformed hole
(3) and concrete slab test specimen (1) is by structure gluing knot, and the compression face of the high elastic rubber pipe (2) passes through structure gluing
It ties mild steel bed course (4).
7. concrete slab corrosion deterioration test device under complexing action according to claim 1, it is characterised in that: pass through
The water inlet of sealing room is passed through attack solution, and the attack solution is sodium sulphate, magnesium sulfate, sodium chloride, any one in magnesium chloride
The mixed liquor of kind or several solns.
8. a kind of side based on concrete slab corrosion deterioration test device under complexing action as claimed in claim 1 to 7
Method, which comprises the following steps:
The first step, attack solution calculation of pressure；
Second step, compression bolts and stress bolt intensity requirement calculate；
Third step seals concrete sample, coats latex in the compression face for the concrete standard test specimen for pouring and having conserved first,
And it is sealed outside concrete standard test specimen using high elastic rubber pipe；After sealing, cut on the high elastic rubber pipe of tension face
Reserved opening, and smearing structure glue are opened, tension steel plate is pasted on concrete slab test specimen, after it reaches adhesion strength,
The high elastic rubber pipe external pasting mild steel bed course of compression face, the application pressing force steel plate on mild steel bed course, in pressure steel plate, pulling force steel
Equal prepared screw-bolt hole on plate；It limits seepage channel and flows to bottom from the top of concrete standard test specimen；
4th step, positive pretightning force apply: pass through the bolt hole in pressure steel plate using compression bolts, and screw compression bolts to
Concrete standard test specimen applies compression, and prestressing force size is monitored by pressure sensor, until specifying load；
5th step, assembles pedestal and installs concrete standard test specimen: lower permeable stone is installed on the base, if installing on lower permeable stone
Dry row is internally provided with the steel ball track of stainless shot, bed course block is installed on stainless shot, and installation rubs in the side of bed course block
It wipes power loading axis and is used to support the load bracket of frictional force loading axis, upper dankness stone, base are installed at the top of concrete standard test specimen
Seat is installed on sealing room bottom plate；
6th step installs tension side isolation ward steel plate: installation tension side isolation ward steel plate, and uses bottom surface water stop rubber and bottom surface
Bolt is fixed on sealing room bottom plate, and force transmission rack is welded between tension side isolation ward steel plate and seal box side wall；
7th step applies reversed pretightning force and frictional force: the stress bolt that one end is welded on tension side isolation ward steel plate is worn
The threaded hole on tension steel plate is crossed, and screws stress bolt and applies pulling force to tension steel plate, applies reversed pretightning force to designated value；
Then, by the frictional force in the vertical tension direction of frictional force loading axis application horizontal direction to designated value, and pass through tension sensor
Monitor frictional force size；
8th step, installation compression-side isolation ward steel plate simultaneously seal: installation compression-side isolation ward steel plate, by concrete standard test specimen,
Pedestal and frictional force load bracket are enclosed in isolation ward, and are bolted high elastic rubber pipe, sealing at the top of isolation ward
Steel plate and water stop rubber, isolation ward inside are isolated with the sealing room of external attack solution；
9th step injects attack solution: sealing ceiling portion water inlet valve, injection testing attack solution opened, and is pressurizeed, water
Pressure sensor monitoring seals indoor solution pressure, until reaching the high hydraulic gradient of needs；
Tenth step, make-up solution pressure and pretightning force: when hydraulic pressure sensor monitors that sealing indoor solution pressure loss is more than to set
Definite value then injects attack solution, make-up solution pressure, if isolation room pressure, stress bolt pretightning force by water inlet valve
Loss be more than setting value open seal box water discharging valve, release attack solution, open sealing room, with torque wrench adjustment pressure,
Stress bolt supplements pretightning force to designated value, then seals, and refills attack solution and continues dissolved corrosion test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478152.6A CN107101876B (en) | 2017-06-21 | 2017-06-21 | Concrete slab corrosion deterioration test devices and methods therefor under complexing action |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478152.6A CN107101876B (en) | 2017-06-21 | 2017-06-21 | Concrete slab corrosion deterioration test devices and methods therefor under complexing action |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107101876A CN107101876A (en) | 2017-08-29 |
| CN107101876B true CN107101876B (en) | 2019-09-24 |
Family
ID=59664384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710478152.6A Active CN107101876B (en) | 2017-06-21 | 2017-06-21 | Concrete slab corrosion deterioration test devices and methods therefor under complexing action |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107101876B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727506B (en) * | 2017-09-22 | 2020-01-14 | 河海大学 | Single-crack rock mass chemical-stress coupling test device and test method |
| CN108362594B (en) * | 2018-01-15 | 2020-04-21 | 河海大学 | Test device and method for simulating bidirectional tension and pressure to accelerate concrete corrosion by electric force |
| CN108303318B (en) * | 2018-02-01 | 2024-04-05 | 塔里木大学 | Device and method for testing durability of eccentric pressed concrete |
| CN108645885B (en) * | 2018-05-25 | 2020-07-03 | 吉林大学 | Large-scale soil mass water-heat-force-salt four-field coupling effect test system and method |
| CN109374502B (en) * | 2018-11-19 | 2022-05-13 | 江苏科技大学 | Water head difference penetration test device under load-holding condition |
| CN109342243B (en) * | 2018-11-19 | 2022-05-13 | 江苏科技大学 | Box-type load-holding etching test device |
| CN109507097B (en) * | 2018-11-26 | 2022-08-19 | 建湖联众智慧科技有限公司 | Load-holding erosion test device for concrete bias column |
| CN109406293B (en) * | 2018-12-10 | 2023-06-06 | 镇江市高等专科学校 | Peepable concrete test device |
| CN110470590B (en) * | 2019-09-03 | 2020-12-29 | 中国科学院武汉岩土力学研究所 | Concrete erosion simulation device |
| CN110470592A (en) * | 2019-09-12 | 2019-11-19 | 河海大学 | It is a kind of for simulating the microbiologic(al) corrosion device of concrete for hydraulic structure under different condition |
| CN110849790B (en) * | 2019-11-25 | 2021-05-18 | 浙江大学 | Constant water head static load pile bearing type roadbed seepage erosion test device |
| CN114354406B (en) * | 2021-12-13 | 2023-11-28 | 中铁大桥勘测设计院集团有限公司 | Standard penetration test device and method based on energy correction |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005164256A (en) * | 2003-11-28 | 2005-06-23 | Okumura Corp | Method for estimating and calculating deterioration of concrete structure |
| CN101726439A (en) * | 2009-12-18 | 2010-06-09 | 东南大学 | Method for testing concrete performance under pressure stress-chemical coupling effect and device thereof |
| CN102095651A (en) * | 2011-01-21 | 2011-06-15 | 中国科学院地质与地球物理研究所 | Strain-controlled rock-soil aggregate strength test device |
| CN102213660A (en) * | 2010-04-12 | 2011-10-12 | 青岛理工大学 | Concrete constant stretch holding and composite corrosion testing device |
| CN103383325A (en) * | 2013-07-18 | 2013-11-06 | 河海大学 | Testing device for simulating concrete test piece hydraulic fracture under multi-field coupling condition |
| CN104122186A (en) * | 2014-08-01 | 2014-10-29 | 山东省水利科学研究院 | Permeation corrosion testing device of flexible permeation-proof material and testing method thereof |
| CN104949892A (en) * | 2015-07-08 | 2015-09-30 | 华东交通大学 | Stray current, chloridion and bending fatigue coupling loading simulating device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2635551C (en) * | 2008-06-23 | 2013-04-09 | Schlumberger Canada Limited | Environmental mechanical test apparatus |
-
2017
- 2017-06-21 CN CN201710478152.6A patent/CN107101876B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005164256A (en) * | 2003-11-28 | 2005-06-23 | Okumura Corp | Method for estimating and calculating deterioration of concrete structure |
| CN101726439A (en) * | 2009-12-18 | 2010-06-09 | 东南大学 | Method for testing concrete performance under pressure stress-chemical coupling effect and device thereof |
| CN102213660A (en) * | 2010-04-12 | 2011-10-12 | 青岛理工大学 | Concrete constant stretch holding and composite corrosion testing device |
| CN102095651A (en) * | 2011-01-21 | 2011-06-15 | 中国科学院地质与地球物理研究所 | Strain-controlled rock-soil aggregate strength test device |
| CN103383325A (en) * | 2013-07-18 | 2013-11-06 | 河海大学 | Testing device for simulating concrete test piece hydraulic fracture under multi-field coupling condition |
| CN104122186A (en) * | 2014-08-01 | 2014-10-29 | 山东省水利科学研究院 | Permeation corrosion testing device of flexible permeation-proof material and testing method thereof |
| CN104949892A (en) * | 2015-07-08 | 2015-09-30 | 华东交通大学 | Stray current, chloridion and bending fatigue coupling loading simulating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107101876A (en) | 2017-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107101876B (en) | Concrete slab corrosion deterioration test devices and methods therefor under complexing action | |
| CN100390357C (en) | Analogue experiment stand for interreaction of tunnel structure, surrounding rock and underground water | |
| CN207620797U (en) | A kind of shield tunnel construction phase Load Simulation and structural internal force test system | |
| Foraboschi | Effectiveness of novel methods to increase the FRP-masonry bond capacity | |
| CN107228805B (en) | Three-dimensional pressure-high hydraulic gradient action concrete dissolved corrosion test device and method | |
| CN110749497B (en) | Rock creep triaxial test system and method for continuous water environment effect | |
| CN106980014B (en) | Simulate concrete for hydraulic structure corrosion deterioration test device and method under high hydraulic gradient | |
| CN107165203B (en) | The test method of single-pile vertical orientation static test under the conditions of a kind of stable artesian water | |
| CN106908323A (en) | A kind of rock-like materials Hydraulic fracturing test device and method | |
| Zhang et al. | Seismic performance of Z-type cantilever beam splices of column–tree connection | |
| CN109946027A (en) | A kind of duct pieces of shield tunnel seam waterproof method for testing performance | |
| CN102926550A (en) | System and method for reinforcing masonry structure by using cross wall and flat steel draw bar | |
| CN112146912A (en) | Tunnel multi-catastrophe comprehensive simulation test system | |
| Zhang et al. | Research on structural design of an isolated high-rise building with enlarged base and multiple tower layer in high-intensity area | |
| Yang et al. | Seismic behavior of plane frame with special-shaped CFST columns, H-shaped steel beams and vertical rib connections | |
| CN112982369B (en) | Grouting device and grouting method for controlling high-speed railway subgrade settlement | |
| CN108918249A (en) | Coal-bed flooding wetting, which influences to adopt, acts lower coal deformation test method | |
| CN202866314U (en) | Cross wall adding steel flat tie rod to reinforce masonry structure system | |
| CN207194208U (en) | A kind of three-dimensional rubber earthquake isolating equipment | |
| Wang et al. | Behavior of CFS shear walls infilled with lightweight ceramsite concrete under cyclic loading | |
| CN214334823U (en) | Simulation test device for characteristic evolution of grouting material under multi-field coupling effect | |
| CN115110694A (en) | Novel light gauge steel fire prevention composite wall panel and wall body convenient to installation | |
| Zhang et al. | Construction method of port building structure joint reinforcement of port building structure | |
| Beschi et al. | Beam-column joint retrofitting with high performance fiber reinforced concrete jacketing | |
| Zhang et al. | Mechanical properties of innovative prefabricated friction pendulum bearing with concrete-filled steel tube system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Kailai Inventor after: Li Andong Inventor after: Zhou Qingyong Inventor after: Long Yifei Inventor after: Zhang Kai Inventor after: Shen Zhenzhong Inventor after: Gan Lei Inventor after: Tang Jianzhou Inventor after: Qiu Liting Inventor after: Jiang Ting Inventor after: Zeng Yitao Inventor after: Dong Zuobo Inventor before: Zhang Kailai Inventor before: Li Andong Inventor before: Zhou Qingyong Inventor before: Long Yifei Inventor before: Shen Zhenzhong Inventor before: Gan Lei Inventor before: Tang Jianzhou Inventor before: Qiu Liting Inventor before: Jiang Ting Inventor before: Zeng Yitao Inventor before: Zhang Kai Inventor before: Dong Zuobo |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |