CN109781612B - Durability test device for simulating corrosion of reinforced concrete structure in underground water level fluctuation area of coastal dredger fill environment - Google Patents
Durability test device for simulating corrosion of reinforced concrete structure in underground water level fluctuation area of coastal dredger fill environment Download PDFInfo
- Publication number
- CN109781612B CN109781612B CN201910062733.0A CN201910062733A CN109781612B CN 109781612 B CN109781612 B CN 109781612B CN 201910062733 A CN201910062733 A CN 201910062733A CN 109781612 B CN109781612 B CN 109781612B
- Authority
- CN
- China
- Prior art keywords
- tank
- brine
- water level
- dredger fill
- drainage
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 238000012360 testing method Methods 0.000 title claims abstract description 72
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 23
- 230000007797 corrosion Effects 0.000 title claims abstract description 16
- 238000005260 corrosion Methods 0.000 title claims abstract description 16
- 239000002689 soil Substances 0.000 claims abstract description 89
- 230000003628 erosive effect Effects 0.000 claims abstract description 56
- 239000003673 groundwater Substances 0.000 claims abstract description 19
- 239000012267 brine Substances 0.000 claims description 94
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 94
- 239000004033 plastic Substances 0.000 claims description 33
- 238000002156 mixing Methods 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 25
- 238000007596 consolidation process Methods 0.000 claims description 20
- 238000007667 floating Methods 0.000 claims description 20
- 239000004576 sand Substances 0.000 claims description 16
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 9
- 238000004062 sedimentation Methods 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 9
- 238000004088 simulation Methods 0.000 abstract description 9
- 239000004567 concrete Substances 0.000 description 17
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 8
- 239000011780 sodium chloride Substances 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003971 tillage Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The utility model provides a simulation coastal dredger fill environment groundwater level change district reinforced concrete structure corrodes endurance test device, includes soil box case water level control system, multi-functional environment case and controller, set up erosion soil box in the multi-functional environment case, erosion soil box includes erosion soil box, dredger fill concretion system, dredger fill drainage system installs in erosion soil box bottom, erosion soil box and soil box case water level control system pass through water supply and drainage pipe connection. The utility model provides a durability test device for simulating corrosion of a reinforced concrete test piece under a groundwater level fluctuation area of a coastal dredger fill environment, which is simple to operate, short in test period and low in cost.
Description
Technical Field
The utility model belongs to the technical field of durability test of concrete structures, and particularly relates to a durability test device for simulating corrosion of a reinforced concrete structure in a groundwater level fluctuation area of a coastal dredger fill environment.
Background
Along with the rapid development of economic construction, the demand for land is larger and larger, and the land construction engineering of seagoing land is larger and larger, such as being used in wharfs, unmanned airports and markets, so the technical requirement on the treatment quality of the dredger fill foundation is correspondingly higher. The coastal areas of China are distributed with soft clay layers of sea phase deposition, lake phase deposition and river phase deposition, the clay layers have the characteristics of high water content, poor permeability, low strength, large pores, low density and other structural properties, the distribution is often uneven, and a soft soil foundation needs to be reasonably and effectively treated, so that the research on the durability of the concrete for the dredger fill circular tillage with variable groundwater level is an urgent need for social development.
The storage and migration of chloride salts in concrete through water molecules plays a critical role in the durability of the concrete structure. The simulation method of the soil-filling ring tillage durability test with the changeable underground water level mainly comprises an automatic control method under a dry-wet cycle. The change of the underground water level enables the surface concrete to have a water convection area, and the convection transmission effect of water greatly accelerates the transmission speed of erosion media into the concrete. The environment is different from place to place in the world, and the environment can change along with seasonal changes and day-and-night changes, and the change of two important parameters of the environment temperature and the environment humidity is mainly reflected, and the factors are directly related to the water diffusion speed of the concrete surface and influence the depth of a water convection area of the surface concrete. To study the durability of the concrete structure of the dredger fill ring tillage with variable groundwater level in a laboratory, the groundwater level fluctuation in the natural environment must be accurately simulated, the humidity and the temperature must be accurately controlled, and the artificial environment conditions must be accurately controlled.
The Chinese patent application No. 201621208083.4 issued in 5.17.2017 discloses a dredger fill consolidation drainage system which has short consolidation duration and good consolidation effect, but can not realize consolidation drainage under dry and wet circulation of dredger fill; the Chinese patent application No. 201620736372.5 issued in 1/4 of 2017 discloses an automatic vacuum preloading drainage consolidation model test system which can measure the surface sedimentation condition of soil layers and the water content change of certain fixed points of soil bodies, but cannot monitor the water content change of soil bodies with different heights, can not consolidate and drain dredger fill of the device, and has various test device types; the China patent application No. 201320494806.1 issued in 3/26 of 2014 discloses a durability test device for simulating the action of ocean tides in an artificial environment, wherein the system can automatically simulate the action of the tides, but cannot realize the change of the groundwater level in the dredger fill environment of the device; the China patent application No. 201020579952.0 granted by 5.25.2011 discloses a device for accelerating simulation test of erosion of concrete chloride in a sea water tidal zone, which can automatically simulate tidal action, but cannot realize control of an artificial environment and change of the groundwater level in a dredger fill environment; the Chinese patent application No. 200720111807.8 issued in 5/14/2008 discloses a multifunctional walk-in artificial environment composite simulation durability test device which can automatically simulate an artificial environment, but has various test devices and is not applied to the durability test of reinforced concrete structure corrosion in a dredger fill environment ground water level fluctuation area of the device.
Therefore, the durability test device for simulating corrosion of the reinforced concrete test piece under the groundwater level fluctuation area of the coastal dredger fill environment is designed, the operation is simple, the test period is short, the cost is low, the durability test device is crucial for researching the transmission of chloride ions in the concrete under the dry-wet circulation condition, and the durability research result based on the device also provides basic guarantee for the durability research of the concrete structure and the structural design based on the durability.
Disclosure of Invention
Aiming at overcoming the defects of troublesome operation, longer test period and higher cost in the prior art and overcoming the defects of the prior test technology, the utility model provides the durability test device for simulating the corrosion of the reinforced concrete test piece under the groundwater level fluctuation area of the coastal dredger fill environment, which is simple to operate, short in test period and low in cost.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a simulation coastal dredger fill environment groundwater level change district reinforced concrete structure corrodes endurance test device, includes soil box case water level control system, multi-functional environment case and controller, set up erosion soil box in the multi-functional environment case, erosion soil box includes erosion soil box, dredger fill concretion system, dredger fill drainage system installs in erosion soil box bottom, erosion soil box and soil box case water level control system pass through water supply and drainage pipe connection.
Further, the dredger fill consolidation system comprises an erosion soil tank, a sealing film, a plastic drainage plate, a vacuum pump, a sedimentation displacement sensor and an air exhaust pipeline, wherein the sealing film covers the top of the dredger fill, the consolidation drainage process is free from air leakage, the plastic drainage plate is inserted into the dredger fill, the vacuum pump is connected with the inside of the dredger fill through the air exhaust pipeline, and the sedimentation displacement sensor is placed on the sealing film.
Still further, dredger fill drainage system includes drainage pipe network, geotechnique's cloth, sand bed course, plastic filter screen spreads in corroding soil tank bottom, drainage pipe network spreads on plastic filter screen, sand bed course spreads on the drainage pipe network, geotechnique's cloth spreads on the sand bed course.
Still further, soil box water level control system includes brine pond, salt water allotment case, water level sensor, floater, portable slide rail, first supply and drain pipe, second supply and drain pipe, drainage magnetic drive pump, first solenoid valve, second solenoid valve, the brine pond in settle water level sensor, floater, the floater be connected with salt water allotment case through first solenoid valve, water level sensor be connected with salt water allotment case through drainage magnetic drive pump, second solenoid valve.
The floating ball and the water level sensor in the brine pond are arranged on the movable slide rail, and the heights of the floating ball and the water level sensor are adjustable;
the erosion soil tank is a carbon fiber tank, and a plurality of reserved holes are respectively drilled on the upper edge of the wall of the carbon fiber tank at different heights;
the inner wall of the reserved hole is provided with threads, the reserved hole is in bolt sealing connection with the threaded plastic cover, and the reserved hole is plugged by the threaded plastic cover during vacuum preloading.
The reserved holes are provided with rubber plugs, the reserved holes are sealed by the rubber plugs, the rubber plugs have corrosion resistance, and the rubber plugs are watertight before and after the saturation sensor is plugged.
The brine tank is covered with a brine tank heat-insulating cover, the brine mixing box is covered with a brine mixing box cover, the brine tank heat-insulating cover is provided with a first pressure balance hole, the brine mixing box cover is provided with a second pressure balance hole, and the wall of the brine mixing box is provided with transparent water level scale marks;
the brine pond and the brine mixing box are internally made of polytetrafluoroethylene, the outside is made of hard foaming urethane for heat preservation, and the brine mixing box is arranged on a vertical frame right above the brine pond;
the multifunctional environment box comprises a saturation sensor, a temperature and humidity control system, a pressure balance pipeline and a data signal line reserved hole, wherein the control system is connected with the temperature and humidity control system and is used for monitoring the temperature and humidity inside the multifunctional environment box in real time; the pressure balance pipeline keeps consistent with the external atmospheric pressure; the saturation sensors are arranged in a plurality of ways along with the height, and are respectively inserted into reserved holes at different heights during testing.
The controller consists of three PLC modules, and is used for respectively controlling the water level control system, the multifunctional environment box and the saturation sensor by programming and connecting with the controller; the saturation sensor, the drainage magnetic drive pump, the first electromagnetic valve, the second electromagnetic valve and the water level sensor are all connected with the controller.
The test piece adopts a reinforced concrete eccentric column of a self-balancing constraint system, and a counter-force loading base is arranged below the test piece.
The technical conception of the utility model is as follows: based on the basic working principle of the communicating vessel, the bottom is connected with the erosion soil tank and the brine tank, and the pressure balance hole is kept consistent with the external atmospheric pressure, so that when the brine stops flowing, the liquid levels of the erosion soil tank and the brine tank are gradually leveled; the device adopts the floating ball, the water level sensor, the electromagnetic valve and the water pump to control the water level fluctuation condition of the brine tank, and can also achieve the effect of constant water level of the brine tank through the floating ball and the electromagnetic valve, thereby embodying the dual-purpose property, economical efficiency and convenience of a water level control system; the device ensures the tightness of the dredger fill in consolidation and drainage before test by adopting a screw thread processing technology to the inner wall of the preformed hole and adopting a bolt sealing connection with the plastic cover, and bonds and fixes the rubber plug by using high-viscosity glue, the preformed hole is sealed by the rubber plug, and the rubber plug is watertight before and after the saturation sensor is plugged; the saturation sensor is inserted into the reserved holes with different heights, so that the saturation of the dredger fill with different heights in the erosion soil tank is monitored in real time, the accuracy and convenience of in-situ monitoring are ensured, and a new thought is provided for monitoring the saturation of the dredger fill with different heights; the test piece adopted by the device can be a reinforced concrete test piece material or a reinforced concrete eccentric column adopting a self-balancing constraint system, is fixed by a counter-force loading base, can be used for manufacturing a reinforced concrete test piece with cracks, and is widely applied to chloride ion transmission research of concrete with cracks; the counter-force loading base is arranged below the test piece, the inside of the counter-force loading base is provided with grooves, all the test pieces are fixed by long bolts and nuts, the consistency of the placing heights of all the test pieces is ensured, and the test pieces are prevented from rotating or shifting when the water level changes, so that the accuracy of a test piece dry-wet circulation interval is prevented from being influenced; the device adopts the settlement displacement sensor to control the amount of the added dredger fill, and avoids the extreme of soil height caused by uncertainty of consolidation compaction of the dredger fill and the like; the brine mixing box of the device is internally provided with water level scale marks to avoid the water level lower than the height of the prepared brine solution so as to judge whether water is needed to be supplemented; the device adds a layer of plastic filter screen in the dredger fill drainage system, ensures the stable effect when the saline water flows back to the erosion soil tank, improves the applicability of the water level control system, and is a key technology of the water level control system.
The beneficial effects of the utility model are mainly shown in the following steps: the underground water level fluctuation can be fully automatically simulated, the saturation of dredger fill with different heights can be accurately controlled, and the dry and wet circulation times and time can be accurately controlled; the method realizes the accurate control of the artificial environment condition in the underground water level fluctuation, particularly realizes the accurate simulation of the influence of the environment temperature and the humidity on the concrete in the dry-wet circulation process of the contact surface of the concrete and the hydraulic reclamation soil after the water level fluctuation, and ensures that the whole test process is accurately controlled and the environment condition can be quantized; the device realizes the endurance acceleration test and the endurance test with controllable environmental conditions under constant groundwater level through the dry-wet circulation process control in the groundwater level fluctuation, and has the advantages of simple device, convenient operation and low price.
Drawings
Fig. 1 is a structural frame diagram of the present utility model.
FIG. 2 is a schematic structural view of the test device of the present utility model.
FIG. 3 is a schematic view of a multifunctional corrosive soil tank of the present utility model.
FIG. 4 is a top view of a multifunctional corrosive soil tank according to the present utility model
FIG. 5 is a schematic diagram of a dredger fill drainage system of the present utility model.
FIG. 6 is a schematic diagram of a preformed hole of the present utility model.
FIG. 7 is a cross-sectional view of a preformed hole of the present utility model
FIG. 8 is a schematic diagram of a self-balancing restraint system of the present utility model
FIG. 9 is a schematic diagram of a saturation sensor according to the present utility model
FIG. 10 is a schematic diagram of a dredger fill consolidation system according to the present utility model.
FIG. 11 is a graph showing the chloride ion content distribution of concrete with different crack widths in a simulation experiment using the apparatus.
FIG. 12 is a graph showing the concentration of chloride ions at the surface of a simulation experiment using the apparatus.
FIG. 13 is a graph showing erosion depth versus high layer for a simulation experiment using the apparatus.
Wherein, 1 is a soil tank water level control system, 2 is a dredge fill drainage system, 21 is geotechnical cloth, 22 is a sand cushion, 23 is a water filtering pipe network, 24 is a plastic net, 25 is a dredge fill consolidation system, 251 is a sealing film, 252 is a plastic drainage plate, 253 is a vacuum pump, 254 is a sedimentation displacement sensor, 255 is an air suction pipeline, 3 is a multifunctional environment tank, 31 is a temperature and humidity control system, 32 is a hygrothermograph, 33 is a pressure balance pipeline, 34 is a threading preformed hole of a detection data signal line, 4 is a brine pond, 41 is a floating ball, 411 is a first water supply and drainage pipe, 412 is a first electromagnetic valve, 413 is a first water supply and drainage pipe water stop clamp, 42 is a water level sensor, 421 is a second water supply and drainage pipe, 422 is a second electromagnetic valve, 423 is a drainage magnetic pump, 424 is a second water supply and drainage pipe water stop clamp the brine pond heat preservation cover is 43, the first pressure balance hole is 431, 44 is the movable slide rail, 9 is the erosion soil tank case, 5 is the erosion soil tank, 51 is the carbon fiber case, 52 is the reserved hole, 53 is the rubber stopper, 54 is the screw thread plastic cover, 55 is the saturation sensor, 57 is the third water supply and drainage pipe, 571 is the rubber joint sleeve, 572 is the filter screen, 573 is the third water supply and drainage pipe water stop clamp, 6 is the brine mixing case, 61 is the brine mixing case cover, 611 is the second pressure balance hole, 62 is the fourth water supply and drainage pipe water stop clamp, 621 is the riser, 63 is the water level scale mark, 7 is the controller, 8 is the self-balancing constraint system, 81 is the counter force loading base, 82 is the long bolt, 83 is the nut, and 84 is the test piece.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Example 1
Referring to fig. 1 to 13, a durability test device for simulating corrosion of a reinforced concrete structure in a groundwater level fluctuation zone of a coastal dredger fill environment comprises a soil tank water level control system 1, a multifunctional environment tank 3 and a controller 7, wherein an erosion soil tank 9 is arranged in the multifunctional environment tank 3, the erosion soil tank 9 comprises an erosion soil tank 5, a dredger fill consolidation system 2 and a dredger fill drainage system 25, the dredger fill drainage system 25 is arranged at the bottom of the erosion soil tank 5, and the erosion soil tank 5 is connected with the soil tank water level control system 1 through a third water supply and drainage pipe 57.
The dredge fill consolidation system 25 comprises an erosion soil tank 5, a sealing film 251, a plastic drain plate 252, a vacuum pump 253, a sedimentation displacement sensor 254 and an air exhaust pipeline 255, wherein the sealing film 251 covers the top of the dredge fill, no air leakage occurs in the consolidation drainage process, the plastic drain plate 252 is inserted into the dredge fill, the vacuum pump 253 is connected with the inside of the dredge fill through the air exhaust pipeline 255, and the sedimentation displacement sensor 254 is placed on the sealing film 251 to control the height of the dredge fill.
The dredger fill drainage system 2 comprises geotechnical cloth 21, a sand cushion layer 22, a water filtering pipe net 23 and a plastic filter screen 24, wherein the plastic filter screen 24 is paved at the bottom of the corrosive soil tank 5, the water filtering pipe net 23 is paved on the plastic filter screen 24, the sand cushion layer 22 is paved on the water filtering pipe net 23, and the geotechnical cloth 21 is paved on the sand cushion layer 22;
the soil tank water level control system 1 comprises a brine tank 4, a brine supplementing tank 6, a water level sensor 42, a floating ball 41, a first water supply and drainage pipe 411, a second water supply and drainage pipe 421, a drainage magnetic pump 423, a first electromagnetic valve 412 and a second electromagnetic valve 422, wherein the water level sensor 42 and the floating ball 41 are arranged in the brine tank 4, the floating ball 41 is connected with the brine supplementing tank 6 through the first electromagnetic valve 412, and the water level sensor 42 is connected with the brine supplementing tank 6 through the drainage magnetic pump 423 and the second electromagnetic valve 422;
the floating ball 41 and the water level sensor 42 in the brine pond 4 are arranged on the movable slide rail 44, and the heights of the floating ball and the water level sensor are adjustable;
the erosion soil tank 5 is a carbon fiber tank 51, and a plurality of reserved holes 52 are respectively drilled on the wall of the carbon fiber tank 51 along different heights;
the inner wall of the hole of the reserved hole 52 is threaded and is in bolt sealing connection with the threaded plastic cover 54, and the threaded plastic cover 54 is used for sealing during vacuum preloading.
The reserved eyelet 52 is provided with a rubber plug 53, the reserved eyelet 52 is sealed by the rubber plug 53, the rubber plug 53 has corrosion resistance, and the rubber plug 53 is watertight before and after the saturation sensor 55 is inserted and pulled out.
The brine tank 4 is covered with a brine tank cover 43, the brine mixing tank 6 is covered with a brine mixing tank cover 61, the brine tank heat preservation cover 43 is provided with a first pressure balance hole 431, the brine mixing tank cover 61 is provided with a second pressure balance hole 611, and the wall of the brine mixing tank 6 is provided with transparent water level scale marks 64;
the brine pond 4 and the brine supplementing box 6 are internally made of polytetrafluoroethylene, the outside is made of hard foaming urethane for heat preservation, and the brine preparing box 6 is arranged on a vertical frame 63 right above the brine pond 4;
the multifunctional environment box 3 comprises a temperature and humidity control system 31, a pressure balance pipeline 33, a data signal wire reserved hole 34 and a saturation sensor 55, wherein the controller 7 is connected with the temperature and humidity control system 31 and is used for monitoring the temperature and humidity inside the multifunctional environment box 3 in real time; the pressure balance pipe 33 keeps the same with the external atmospheric pressure; the plurality of the saturation sensors 55 are arranged along with the height, and the saturation sensors 55 are respectively inserted into the reserved holes 52 with different heights during testing;
the controller 7 consists of three PLC modules, and the controller 7 is programmed and connected to control the water level control system 1, the multifunctional environment box 3 and the saturation sensor 55 respectively; namely, the saturation sensor 55, the drainage magnetic pump 423, the first electromagnetic valve 412, the second electromagnetic valve 422 and the water level sensor 42 are all connected with the controller 7.
The self-balancing restraint system 8 comprises a counter-force loading base 81, a long bolt 82, a nut 83 and a test piece 84, wherein the test piece 84 adopts a reinforced concrete eccentric column of the self-balancing restraint system 8, and the counter-force loading base 81 is arranged below the test piece 84.
Example 2
The test was performed with the test apparatus of example 1, wherein test parameters were set on the controller, the ambient temperature was 30 ℃, the relative humidity was 70%, the humidity sensor was monitored every one hour, and the start-up procedure was started after the parameter setting was completed:
before the test starts, a plastic filter screen 24, a water filtering pipe network 23, a sand cushion layer 22 and geotechnical cloth 21 are paved at the bottom of the erosion soil tank 5 in sequence, wherein the sand cushion layer 22 adopts middle coarse sand with the thickness of 5 cm; the height of the counter-force loading base 81 is adjusted to 10cm, and a reinforced concrete C45 eccentric column test piece 84 of the self-balancing constraint system 1 is placed into the erosion soil tank 5; screwing the plastic cover 54 into the reserved eyelet 52 to ensure complete sealing when the dredger fill is consolidated; by adding a certain amount of water, ensuring that the dredged soil has a certain fluidity, pouring the dredged soil into the vacant part of the erosion soil groove 5, dredging the drain ditch, keeping the dredging, equally inserting the plastic drain plates 252 into the dredged soil at equal intervals, connecting the vacuum pump 253 with the inside of the dredged soil through the air suction pipeline 255, carefully cleaning and detecting shells and pointed stones before paving the sealing film 251, carefully inspecting and timely repairing leaks after paving the first sealing film 251, paving the second sealing film 251, carefully inspecting and timely repairing holes again, putting the settlement displacement sensor 254 on the sealing film 251, monitoring the settlement in real time, controlling the final consolidation height of the dredged soil to be 60cm, ensuring that the error range is 2cm, removing the dredged soil consolidation system 25, screwing off the plastic cover 54, and respectively inserting the plurality of saturation sensors 55 into reserved holes 52 with different heights; the third water supply and drainage pipe 57 is inserted into the bottom of the erosion soil tank 5 and is sealed by glass cement, and then the third water supply and drainage pipe 57 is connected with the brine tank 4 by sleeving a rubber joint sleeve 571; saline with the concentration of 0.23% is added into the saline mixing tank 6, the saline mixing tank 6 is large enough, the highest water level is unchanged, and the normal operation of the whole test can be ensured; determining the height range of the brine in the brine pond 4 according to the required brine concentration and the height of the test piece 84, and arranging the floating ball 41 on the movable slide rail 44 at the high water level of 50 cm; according to the operation controller 7, the first water supply and drainage pipe water stop clamp 413 and the first electromagnetic valve 412 are manually opened, the brine in the brine mixing tank 6 slowly flows into the brine pond 4 through the first water supply and drainage pipe 411, the brine in the brine pond 4 flows into the erosion soil tank 5 through the third water supply and drainage pipe 57, and the water levels of the erosion soil tank 5 and the brine pond 4 are kept consistent at all times through the floating ball;
after the program is started, the controller 7 continuously acquires a temperature signal from the hygrothermograph 32, adjusts the temperature and humidity control system 31 in the multifunctional environment box 3 until a temperature and humidity set value is reached, and keeps stable, so that the dredger fill soil body in the erosion soil tank 5 can gradually reach the set temperature; the controller 7 sends out a signal, the first electromagnetic valve 412 is opened, the brine in the brine mixing tank 6 slowly flows into the brine tank 4 through the first water supply and drainage pipe 411, the brine in the brine tank 4 flows into the erosion soil tank 5 through the third water supply and drainage pipe 57, and the water levels of the erosion soil tank 5 and the brine tank 4 are kept consistent at all times through the floating ball; thus, the program repeatedly runs, and the running of the equipment is stopped after a period is set;
after the test is finished, the rubber connecting sleeve 571 on the third water supply and drainage pipe 57 is removed, residual salt water in the erosion soil tank 5 is discharged, all monitoring data in the controller 7 are exported, and a concrete chloride ion content distribution diagram graph with different crack widths is generated;
example 3
The test was performed with the test apparatus of example 2, wherein test parameters were set on the controller, the ambient temperature was 35 ℃, the relative humidity was 70%, the water pump control flow rate was 0.5mL/min, the cycle was 60 times, the humidity sensor was monitored every one hour, and the start-up procedure was completed after the parameter setting:
before the test starts, a plastic net 24, a water filtering pipe network 23, a sand cushion layer 22 and geotechnical cloth 21 are paved at the bottom of the erosion soil tank 5 in sequence, wherein the sand cushion layer 22 adopts middle coarse sand with the thickness of 5 cm; the height of the counter-force loading base 81 is adjusted to 10cm, and a reinforced concrete C45 eccentric column test piece 84 of the self-balancing constraint system 1 is placed into the erosion soil tank 5; screwing the plastic cover 54 into the reserved eyelet 52 to ensure complete sealing when the dredger fill is consolidated; by adding a certain amount of water, ensuring that the dredged soil has a certain fluidity, pouring the dredged soil into the spare part of an erosion soil tank, dredging a drainage ditch, keeping the dredging, inserting a plastic drainage plate 252 into the dredged soil at equal intervals, connecting a vacuum pump 253 with the inside of the dredged soil through an air suction pipeline 255, carefully cleaning and detecting shells and pointed stones before paving a sealing film 251, carefully inspecting and timely repairing leaks after paving a first sealing film 251, paving a second sealing film 251, carefully inspecting and timely repairing holes again, putting a settlement displacement sensor 254 on the sealing film 251, monitoring the settlement in real time, controlling the final consolidation height of the dredged soil to be 60cm, ensuring that the error range is 2cm, removing a dredged soil consolidation system 25, screwing off a plastic cover 54, and respectively inserting a plurality of saturation sensors 55 into reserved holes 52 with different heights; the third water supply and drainage pipe 57 is inserted into the bottom of the erosion soil tank 5 and is sealed by glass cement, and then the third water supply and drainage pipe 57 is connected with the brine tank 4 by sleeving a rubber joint sleeve 571; saline with the concentration of 0.20% is added into the saline mixing tank 6, the saline mixing tank 6 is large enough, the highest water level is unchanged, and the normal operation of the whole test can be ensured; determining the height range of the brine in the brine pond 4 according to the required brine concentration and the height of the test piece 84, arranging the floating ball 41 at a position of 50cm of high water level on the movable slide rail 44, and arranging the water level sensor 42 at a position of 30cm of low water level on the movable slide rail 44; according to the operation controller 7, the first water supply and drainage pipe water stop clamp 413 and the first electromagnetic valve 412 are manually opened, the brine in the brine mixing tank 6 slowly flows into the brine pond 4 through the first water supply and drainage pipe 411, the brine in the brine pond 4 flows into the erosion soil tank 5 through the third water supply and drainage pipe 57, the water levels of the erosion soil tank 5 and the brine pond 4 are kept constant and consistent through the floating ball, and after the set time is 1 hour, the first electromagnetic valve 412 is manually closed; the second electromagnetic valve 422 and the water draining magnetic pump 423 are manually opened through the controller 7, the second water supply and drainage pipe water stopping clamp 424 is opened, when the water level in the brine pond 4 is lowered to the water level sensor 42, the second electromagnetic valve 422 and the water draining magnetic pump 423 are manually closed, the second electromagnetic valve 422 and the water draining magnetic pump 423 are manually opened through the controller 7 every 30min until the water level of the erosion soil tank 5 and the brine pond 4 is constant at a low water level of 30cm, and the second electromagnetic valve 422 and the water draining magnetic pump 423 are manually closed;
after the program is started, the controller 7 continuously acquires a temperature signal from the hygrothermograph 32, adjusts the temperature and humidity control system 31 in the multifunctional environment box 3 until a temperature and humidity set value is reached, and keeps stable, so that the dredger fill soil body in the erosion soil tank 5 can gradually reach the set temperature; the controller 7 sends out a signal, the first electromagnetic valve 412 is opened, and the brine in the brine replenishing tank 6 slowly flows into the brine pond 4 through the first water supply and drainage pipe 411; after the controller 7 sets time for 1 hour, the first electromagnetic valve 412 is closed, and the second electromagnetic valve 422 and the drainage magnetic pump 423 are opened; the controller 7 acquires a signal from the water level sensor 42 in the brine tank 4, and when the water level in the brine tank 4 drops to the water level sensor 42, the controller 7 sends out a signal, and the second electromagnetic valve 422 and the water drainage magnetic pump 423 are closed; the controller 7 sends out signals every 30min to start the second electromagnetic valve 422 and the water draining magnetic pump 423, and the circulation is carried out for 4 times until the water level of the erosion soil tank 5 and the brine tank 4 is constant at the low water level of 30 cm; thus, the program is repeatedly operated, and the operation of the equipment is stopped after 60 cycles;
after the test is finished, the rubber connecting sleeve 571 on the third water supply and drainage pipe 57 is removed, residual saline water in the erosion soil tank 5 is discharged, all monitoring data in the controller 7 are exported, and a distribution curve graph of chloride ion concentration along with a high layer and a distribution curve graph of erosion depth along with the high layer are generated;
the embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present utility model should not be construed as being limited to the specific forms set forth in the embodiments, but also equivalent technical means that can be conceived by those skilled in the art according to the inventive concept.
Claims (5)
1. The durability test device for simulating corrosion of the reinforced concrete structure in the underground water level fluctuation area of the coastal dredger fill environment is characterized by comprising a soil tank water level control system, a multifunctional environment tank and a controller, wherein an erosion soil tank is arranged in the multifunctional environment tank, the erosion soil tank comprises an erosion soil tank, a dredger fill consolidation system and a dredger fill drainage system, the dredger fill drainage system is arranged at the bottom of the erosion soil tank, and the bottom of the erosion soil tank is connected with the soil tank water level control system through a third water supply and drainage pipe; the system comprises a sealing film, a plastic drainage plate, a vacuum pump, a sedimentation displacement sensor and an air exhaust pipeline, wherein the sealing film covers the top of the dredger fill, no air leakage is caused in the consolidation drainage process, the plastic drainage plate is inserted into the dredger fill, the vacuum pump is connected with the inside of the dredger fill through the air exhaust pipeline, and the sedimentation displacement sensor is placed on the sealing film; the dredger fill drainage system comprises a drainage pipe network, geotechnical cloth, a sand cushion layer and a plastic filter screen, wherein the plastic filter screen is paved at the bottom of an erosion soil tank, the drainage pipe network is paved on the plastic filter screen, the sand cushion layer is paved on the drainage pipe network, and the geotechnical cloth is paved on the sand cushion layer; the soil tank water level control system comprises a brine tank, a brine mixing tank, a water level sensor, a floating ball, a movable sliding rail, a first water supply and drainage pipe, a second water supply and drainage pipe, a drainage magnetic pump, a first electromagnetic valve and a second electromagnetic valve, wherein the water level sensor and the floating ball are arranged in the brine tank, the floating ball is connected with the brine mixing tank through the first electromagnetic valve, and the water level sensor is connected with the brine mixing tank through the drainage magnetic pump and the second electromagnetic valve; the floating ball and the water level sensor in the brine pond are arranged on the movable slide rail, and the heights of the floating ball and the water level sensor are adjustable; the brine tank is covered with a brine tank heat-insulating cover, the brine mixing box is covered with a brine mixing box cover, the brine tank heat-insulating cover is provided with a first pressure balance hole, the brine mixing box cover is provided with a second pressure balance hole, and the wall of the brine mixing box is provided with transparent water level scale marks; the test piece adopts a reinforced concrete eccentric column of a self-balancing constraint system, and a counter-force loading base is arranged below the test piece.
2. The endurance test device for simulating corrosion of reinforced concrete structures in a groundwater level fluctuation zone of a coastal dredger fill environment according to claim 1, wherein the erosion soil tank is a carbon fiber tank, and a plurality of reserved holes are respectively punched on the upper edge of the wall of the carbon fiber tank at different heights; the inner wall of the reserved hole is provided with threads, the reserved hole is in bolt sealing connection with the threaded plastic cover, and the reserved hole is plugged by the threaded plastic cover during vacuum preloading; the reserved holes are provided with rubber plugs, the reserved holes are sealed by the rubber plugs, the rubber plugs have corrosion resistance, and the rubber plugs are watertight before and after the saturation sensor is plugged.
3. The endurance test device for simulating corrosion of reinforced concrete structures in a groundwater level fluctuation area of a coastal dredger fill environment according to claim 1, wherein polytetrafluoroethylene is adopted inside a brine pond and a brine allocation box, hard foaming urethane is adopted for heat preservation outside the brine pond and the brine allocation box is arranged on a stand right above the brine pond.
4. The endurance test device for simulating corrosion of reinforced concrete structures in a groundwater level fluctuation area of a coastal dredger fill environment according to claim 1, wherein the multifunctional environment box comprises a saturation sensor, a temperature and humidity control system, a pressure balance pipeline and a data signal wire reserved hole, the controller is connected with the temperature and humidity control system, and the temperature and humidity inside the multifunctional environment box are monitored in real time; the pressure balance pipeline keeps consistent with the external atmospheric pressure; the saturation sensors are arranged in a plurality of ways along with the height, and are respectively inserted into reserved holes at different heights during testing.
5. The endurance test device for simulating corrosion of reinforced concrete structures in a groundwater level fluctuation area of a coastal dredger fill environment according to claim 1, wherein the controller consists of three PLC modules, and is respectively controlled by a soil tank water level control system, a multifunctional environment tank and a saturation sensor through programming and connecting with the controller; the saturation sensor, the drainage magnetic drive pump, the first electromagnetic valve, the second electromagnetic valve and the water level sensor are all connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910062733.0A CN109781612B (en) | 2019-01-23 | 2019-01-23 | Durability test device for simulating corrosion of reinforced concrete structure in underground water level fluctuation area of coastal dredger fill environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910062733.0A CN109781612B (en) | 2019-01-23 | 2019-01-23 | Durability test device for simulating corrosion of reinforced concrete structure in underground water level fluctuation area of coastal dredger fill environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109781612A CN109781612A (en) | 2019-05-21 |
| CN109781612B true CN109781612B (en) | 2023-11-07 |
Family
ID=66501973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910062733.0A Active CN109781612B (en) | 2019-01-23 | 2019-01-23 | Durability test device for simulating corrosion of reinforced concrete structure in underground water level fluctuation area of coastal dredger fill environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109781612B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115100939A (en) * | 2022-02-22 | 2022-09-23 | 温州大学 | Coastal city coastal tide fluctuation simulation device and test method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471983A (en) * | 2013-08-13 | 2013-12-25 | 浙江工业大学 | Durability test device for simulating ocean tidal action in artificial environment |
| CN206173939U (en) * | 2016-11-09 | 2017-05-17 | 浙江水利水电学院 | Dredger fill concreties drainage system |
| JP2017215300A (en) * | 2016-06-02 | 2017-12-07 | 日本電信電話株式会社 | Soil corrosion test apparatus and test method thereof |
| CN208076278U (en) * | 2018-01-29 | 2018-11-09 | 浙江工业大学 | A kind of device for making concrete generate uniform tension damage |
| CN210108912U (en) * | 2019-01-23 | 2020-02-21 | 浙江工业大学 | Concrete structure durability test device under dredger fill environment |
-
2019
- 2019-01-23 CN CN201910062733.0A patent/CN109781612B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471983A (en) * | 2013-08-13 | 2013-12-25 | 浙江工业大学 | Durability test device for simulating ocean tidal action in artificial environment |
| JP2017215300A (en) * | 2016-06-02 | 2017-12-07 | 日本電信電話株式会社 | Soil corrosion test apparatus and test method thereof |
| CN206173939U (en) * | 2016-11-09 | 2017-05-17 | 浙江水利水电学院 | Dredger fill concreties drainage system |
| CN208076278U (en) * | 2018-01-29 | 2018-11-09 | 浙江工业大学 | A kind of device for making concrete generate uniform tension damage |
| CN210108912U (en) * | 2019-01-23 | 2020-02-21 | 浙江工业大学 | Concrete structure durability test device under dredger fill environment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109781612A (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106290800B (en) | A kind of soil-slope water resistant stream erosiveness simulation experiment method and device | |
| CN108222082B (en) | Dynamic precipitation indoor model test method and device for foundation pit under condition of multiple aquifers | |
| CN103046528B (en) | A kind of well casing for underground water in the vertical efficient decimation low-permeability water-bearing medium of laboratory and using method | |
| CN111103418B (en) | Simulation test system and test method for ground settlement caused by extraction of confined water | |
| CN109709308B (en) | Water-mining type ground crack physical model test device and test method | |
| CN110470598B (en) | Geomembrane leakage simulation tester considering dynamic water pressure and test method thereof | |
| CN103592424A (en) | Physical model test apparatus for confined groundwater in bedding bank slope | |
| CN109211673B (en) | Water-rich bedrock section inclined shaft freezing well wall stress simulation test system and method | |
| CN107240346A (en) | The experiment simulator and method of a kind of quantitative study karst collapse | |
| CN110208489B (en) | Simulation test device and test method for capillary water rise height in roadbed soil | |
| CN103389260A (en) | Laboratory simulation test method for researching underground water seepage obstruction caused by pile foundation | |
| CN101246156B (en) | Farmland underground eluviation in-situ monitoring device | |
| CN111175477A (en) | Saturated fine sand layer induced grouting experimental model and experimental method | |
| CN105043910B (en) | A kind of reciprocal the erosion caused by sloping surfaces experimental rig under water become under kinetic head effect | |
| CN109781612B (en) | Durability test device for simulating corrosion of reinforced concrete structure in underground water level fluctuation area of coastal dredger fill environment | |
| KR20110114759A (en) | The loading plate of flexible membrane and the device and the method thereof | |
| CN116539846A (en) | Simulation device and method for multi-water source replenishment of thick aquifer damage in coal seam exploitation | |
| CN106480871B (en) | A kind of automation settlement monitoring device and method being applicable in Yu Haiyang's land reclamation construction usage | |
| CN210108912U (en) | Concrete structure durability test device under dredger fill environment | |
| CN215812302U (en) | Reinforced concrete receives water and soil erosion durability research test device | |
| CN113552037B (en) | Device and method for testing dual-porosity seepage parameters of garbage | |
| Sun et al. | Experimental study on hydraulic erosion characteristics of ecological slope of tailings reservoir under rainfall | |
| CN108817051B (en) | System and method for ex-situ remediation of contaminated soil based on natural cold energy | |
| CN203758880U (en) | Experiment device for researching permeation mechanism of low-permeability oil layer | |
| CN206459935U (en) | A kind of instrument for measuring permeability coefficient device of water-permeable brick |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |