CN110455703A - A kind of test device and its test method of compacted soil vaporous water and lyotropic salt migration - Google Patents

A kind of test device and its test method of compacted soil vaporous water and lyotropic salt migration Download PDF

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Publication number
CN110455703A
CN110455703A CN201910823309.3A CN201910823309A CN110455703A CN 110455703 A CN110455703 A CN 110455703A CN 201910823309 A CN201910823309 A CN 201910823309A CN 110455703 A CN110455703 A CN 110455703A
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Prior art keywords
sample loading
soil
loading bucket
hole
temperature
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马博
盛岱超
吕擎峰
张升
叶新宇
李强
马新岩
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Beijing New Airport Construction Headquarters
Caac Airport Construction Group Co Ltd
Central South University
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Beijing New Airport Construction Headquarters
Caac Airport Construction Group Co Ltd
Central South University
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Priority to CN201910823309.3A priority Critical patent/CN110455703A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00Investigating resistance of materials to the weather, to corrosion, or to light
    • G01N17/002Test chambers

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  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
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  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses test devices and its test method that a kind of compacted soil vaporous water and lyotropic salt migrate, include hollow sample loading bucket, hollow sample loading bucket is fixed in insulating box by fixture;Hollow sample loading bucket bottom is connect by flange with glass tube, and glass bottom of the tube is connected to by water-supply-pipe with Markov bottle, and Markov bottle is fixed in thermostatic box by fixture;Hollow sample loading bucket top is provided with vibrating motor, and vibrating motor is connected with load plate by load bar, can be fully removed out of staving;Hollow sample loading bucket top is additionally provided with refrigerating fluid circulation pipe, and refrigerating fluid circulation pipe is connect with refrigeration system;Constant temperature box body top is equipped with hole, can just hold load bar and refrigerating fluid circulation pipe passes through, constant temperature box body, which is additionally provided with, can hold the hole that data line passes through;Vertical direction on the bucket wall of the hollow sample loading bucket offers several round holes, is inserted into sensor probe on any one round hole.

Description

A kind of test device and its test method of compacted soil vaporous water and lyotropic salt migration
Technical field
The invention belongs to soil testing device and technical fields, and in particular to a kind of compacted soil vaporous water and lyotropic salt move The test device and its test method of shifting.
Background technique
Arid and semiarid region of Northwest China starts largely to build the traffic infrastructures such as high-speed railway, highway, airfield runway. In arid or semiarid zone, precipitation is rare, and evaporation capacity is big, and underground water buried depth is big, with vaporous water in entire unsaturated soil body Based on migration.
There is the public transport such as high-speed rail, carplane traveling on traffic infrastructure daily, they can generate dynamic load, The roadbed of traffic infrastructure is a kind of porous media material, and under dynamic loading, vaporous water can migrate upwards in the soil body, The zwitterion having by oneself in the soil body can migrate upwards with vaporous water, and moisture and salt accumulation are on soil body top, it will cause one The secondary disaster of series and roadbed and the road surface for destroying traffic infrastructure.
Currently, being concentrated mainly on liquid water and without lotus for the research of the migration rule of water in the unsaturation soil body both at home and abroad Vaporous water under carrying, and the migration characteristic research of vaporous water is less under the migration characteristic and dynamic load for lyotropic salt, test is set It is standby also fewer.And in order to preferably simulate gaseous state in the roadbed of the traffic infrastructures such as high-speed railway, highway, airfield runway Water, lyotropic salt migration and variation, research can measure the equipment detection of vaporous water and salt migration in the soil body simultaneously under dynamic load, The secondary disaster generated by roadbed or pavement destruction can largely be reduced.
Summary of the invention
The test device and its test method for being to provide a kind of compacted soil vaporous water and lyotropic salt migration of the invention, In Under conditions of temperature is constant, accurate quantitative analysis is measured under different time, under different dynamic load, vaporous water in the soil body, temperature, can The migration and variation situation of insoluble ionic.
This test compacted soil vaporous water of the present invention and lyotropic salt moving apparatus, include hollow sample loading bucket (1), hollow Sample loading bucket (1) is fixed in insulating box (11) by fixture (12);Hollow sample loading bucket (1) bottom passes through flange (4) and glass tube (7) it connects, glass tube (7) bottom is connected to by water-supply-pipe (9) with Markov bottle (8), and Markov bottle (8) is fixed by fixture (12) In in thermostatic box;Hollow sample loading bucket (1) top is provided with vibrating motor (13), and vibrating motor (13) passes through load bar (14) It is connected with load plate (15), load plate (15) can be moved down on hollow sample loading bucket (1) is interior by adjusting the length of load bar (14) It is dynamic, it can also be fully removed out of staving;Hollow sample loading bucket (1) top is additionally provided with refrigerating fluid circulation pipe (17), refrigerating fluid circulation Pipe (17) is connect with refrigeration system (16);Insulating box (11) cabinet top is equipped with hole, can just hold load bar (14) and refrigeration Liquid circulation pipe (17) passes through, and insulating box (11) cabinet, which is additionally provided with, can hold the hole that data line (18) passes through;The sky Vertical direction on the bucket wall of heart sample loading bucket (1) offers several round holes (2), and temperature conductance is inserted on any one round hole Rate integrated transducer pops one's head in (6);Temperature conductivity integrated transducer probe (6), vibrating motor (13), insulating box (11) It is connected by data line with the data line input terminal of computer (19) with refrigeration system (16).
It is also wrapped on one layer of heat preservation layer (3) after the outer wall of the hollow sample loading bucket (1), also hole on insulating layer (3) (2), corresponding with hole (2) position on hollow sample loading bucket (1), other than the hole for being equipped with sensor, remaining hole is equal Configured with insulation plug (20).
The flange (4) is solid ring flange, and there are many aperture (5) on solid flange.
The load bar (14) is telescopic load bar;Load bar (14) is connected through a screw thread with load plate (15).
Described glass tube (7) lower part is additionally provided with barometric pipe (10).
The height of the hollow sample loading bucket (1) is 30cm.
Using moisture content in the test device testing soil, the method for temperature and ion, including some steps:
It 1),, will after hitting reality by dry density point multilayer to sample loading bucket (1) filling experiment soil sample after removing load plate (15) Load plate (15) is placed in soil body upper layer, after connecting with load bar (14);Then by circulating condensing pipe (17) height adjustment to dress At sample bucket (1) staving top about 1~3cm, the position of 1cm above load plate (16), subsequently on staving top, cladding multilayer is protected Dangerous film seals soil body top, closes insulating box (11).
2) solution needed for testing will be added in Markov bottle (8), make in organic glass water-supply-pipe (7) solution face have 2cm away from From;
3) according to required experimental condition, pass through the temperature of computer (19) setting insulating box (11), refrigeration system (16) The vibration frequency of temperature and vibrating motor (13), then starts to test;
4) after on-test, computer end (7) is passed every the temperature moisture content conductivity integration that setting time is automatically stored The numerical value that sensor is popped one's head on (6), and at corresponding time point, the plug of insulating layer is opened, with soil sampler in same vertical plane The soil that 3cm depth is respectively taken in circular hole, after the completion of taking soil, the soil sample for backfilling homogenous quantities blocks circular hole, and clogs plug, second from Another hole in the section of its sustained height takes soil, and so on;
5) by the soil of taking-up, its inner end 2cm is selected, drying is milled, and is configured to solution by Tu Shui ratio 1:5, is then allowed to stand Filtering, tests its each ion concentration with ion chromatograph;
6) after the completion of testing, surveyed moisture content, temperature, ion concentration are depicted as curve.
Setting time in the step 4) can be according to experiment condition, sets itself.
Beneficial effects of the present invention: 1) present invention can accurately control earth pillar upper end temperature, can accurately control soil The temperature of column lower end make-up gas, the oscillatory load frequency that can accurately control earth pillar upper end reach preferably simulation roadbed Truth under dynamic load, to further confirm that the accuracy of test data.2) invention emulates high-speed railway, Vaporous water, lyotropic salt migration and variation, can predict roadbed in advance in the roadbed of the traffic infrastructures such as highway, airfield runway Situation provides better means of defence for protection engineering foundation facility.3) present invention can accurate quantitative analysis measurement in different time Under, under different dynamic load, the migration and variation situation of vaporous water, temperature, soluble ion in the soil body understands roadbed not in all directions With the situation in situation.4) apparatus of the present invention structure is simple, facilitates installation, test operation flexible, meets a variety of soil samples and examination Test condition.
Detailed description of the invention
The structural schematic diagram of Fig. 1 apparatus of the present invention;
The top view of the hollow sample loading bucket Section A-A of Fig. 2 apparatus of the present invention;
Wherein: the hollow sample loading bucket of 1-, 2- hole, 3- insulating layer, 4- flange, 5- aperture, 6- temperature conductivity integration pass Sensor probe, 7- glass tube, 8- Markov bottle, 9- water-supply-pipe, 10- barometric pipe, 11- insulating box, 12- fixture, 13- vibration The cold liquid circulation pipe of motor, 14- load bar, 15- load plate, 16- refrigeration system, 17-, 18- data line, 19- computer, 20- Insulation plug.
Specific embodiment
Embodiment 1
Below with reference to the drawings and specific embodiments, the present invention is described in detail, as illustrated in fig. 1 and 2,
Test device in the present embodiment, includes hollow sample loading bucket 1, and the height of hollow sample loading bucket 1 is 30cm, staving Diameter is 15cm;The vertical direction of hollow sample loading bucket 1 is uniformly provided with 6 round holes 2, and the number in every round hole is 5 (from bucket Body top starts, and the spacing of the vertical direction of hole is 5cm), the diameter of hole 2 is 1cm;It is coated on hollow 1 outer wall of sample loading bucket There is one layer of heat preservation layer 3, the position of the hole on bucket wall of insulating layer 3 is corresponding also to open up hole 2, and is configured with insulation plug 20. 5 temperature electricity are inserted into the present embodiment for being inserted and fixed temperature conductivity integrated transducer probe 6 in one round hole 2 altogether Conductance integrated transducer probe 6, remaining round hole 2 is for uniformly taking test soil sample.The temperature conductivity integration passes Model EM-5TE soil moisture, the temperature, conductivity sensor of sensor probe 6.
Hollow 1 bottom of sample loading bucket is connected by flange 4 with glass tube 7, and flange 4 is solid ring flange, and aperture is arranged at bottom 5, the diameter of aperture 5 is 5mm;7 bottom of glass tube is connected to by drain pipe 9 with Markov bottle 8, and it is flat that air pressure is arranged in 7 bottom of glass tube Weigh pipe 10, and the height of barometric pipe 10 in a glass tube should be 3cm.
The top of hollow sample loading bucket 1 is provided with refrigerating fluid circulation pipe 17 and load plate 15;Load plate 15 passes through telescopic Load bar 14 is connected with vibrating motor 13, and the diameter of load plate 15 is that 14cm is slightly less than hollow sample loading bucket 1, load bar 14 with plus Support plate 15 is attached by screw thread;Refrigerating fluid circulation pipe 17 protrudes into staving top about 1cm or so, does not contact with bucket wall, and adds 15 top 1cm of support plate or so;Refrigerating fluid circulation pipe 17 is cylindrical pipe, diameter 2cm;Refrigerating fluid circulation pipe 17 and refrigeration System 16 connects.The model TMS8035-R40 of refrigeration system 16.Staving top when the control test of refrigerating fluid circulation pipe 17 Temperature is lower, preferably simulates the low characteristic of northwest soil winter topsoil temperature;Load plate 15 is provided to test soil sample One dynamic load, closer to simulation traffic roadbed.
Hollow sample loading bucket 1 and Markov bottle are fixed in insulating box 11 by fixture 12, part refrigerating fluid circulation pipe 17 and plus The hole that bar 14 passes through 11 top of insulating box is carried, hollow 1 top of sample loading bucket is located at.
Insulating box 11 guarantees that the temperature of soil body lower part is constant, and refrigerating fluid circulation pipe 17 guarantees that soil body upper layer temperature is lower , insulating layer 3 guarantees that soil sample has a temperature gradient poor from bottom to top.
Temperature conductivity integrated transducer probe 6 passes through the hole on 11 tank wall of insulating box by data line 18 It is connected with 19 end of computer;Refrigeration system 16, vibrating motor 13 and insulating box 11 are connected by data line 18 and computer 19 It connects, i.e., controls the setting of above equipment experimental data and the typing of test parameter with computer 19.
Embodiment 2
1) load plate 15 is first removed, hits reality after hitting reality by dry density point multilayer to sample loading bucket (1) filling experiment soil sample The height of soil layer is 28cm afterwards, load plate 15 is placed in soil body upper layer, after connecting with load bar 14;Then by circulating condensing At 17 height adjustment of pipe to 1 staving top about 1cm of sample loading bucket, the position of 15 top 1cm of load plate, subsequently on staving top Multilayer rupture disk is coated, soil body top is sealed;Close insulating box 11.
2) solution needed for testing will be added in Markov bottle 8, solution face in organic glass water-supply-pipe 7 is made to have 2cm distance;
3) according to required experimental condition, by computer 19 be arranged the temperature of insulating box 11, the temperature of refrigeration system 16 and Then the vibration frequency of vibrating motor 13 starts to test;
4) after on-test, temperature moisture content conductivity integrated sensing that computer 19 is automatically stored every setting time Numerical value on device probe 6 opens the plug of insulating layer and at corresponding time point, with soil sampler same vertical plane circular hole In respectively take the soil of 3cm depth, after the completion of taking soil, the soil sample for backfilling homogenous quantities blocks circular hole, and clogs insulation plug 20, second from Another hole in the section of its sustained height takes soil, and so on;
5) by the soil of taking-up, its inner end 2cm is selected, drying is milled, and is configured to solution by Tu Shui ratio 1:5, is then allowed to stand Filtering, tests its each ion concentration with ion chromatograph;
6) after the completion of testing, surveyed moisture content, temperature, ion concentration are depicted as curve.
Setting time in the step 4) can be according to experiment condition, sets itself.

Claims (7)

1. the test device of a kind of compacted soil vaporous water and lyotropic salt migration, which is characterized in that it include hollow sample loading bucket (1), Hollow sample loading bucket (1) is fixed in insulating box (11) by fixture (12);Hollow sample loading bucket (1) bottom passes through flange (4) and glass Glass pipe (7) connection, glass tube (7) bottom are connected to by water-supply-pipe (9) with Markov bottle (8), and Markov bottle (8) is solid by fixture (12) Due in thermostatic box;Hollow sample loading bucket (1) top is provided with vibrating motor (13), and vibrating motor (13) passes through load bar (14) It is connected with load plate (15), load plate (15) can be moved down on hollow sample loading bucket (1) is interior by adjusting the length of load bar (14) It is dynamic, it can also be fully removed out of staving;Hollow sample loading bucket (1) top is additionally provided with refrigerating fluid circulation pipe (17), refrigerating fluid circulation Pipe (17) is connect with refrigeration system (16);Insulating box (11) cabinet top is equipped with hole, can just hold load bar (14) and refrigeration Liquid circulation pipe (17) passes through, and insulating box (11) cabinet, which is additionally provided with, can hold the hole that data line (18) passes through;The sky Vertical direction on the bucket wall of heart sample loading bucket (1) offers several round holes (2), and temperature conductance is inserted on any one round hole Rate integrated transducer pops one's head in (6);Temperature conductivity integrated transducer pop one's head in (6), vibrating motor (13), insulating box (11) and Refrigeration system (16) is connected by data line with the data line input terminal of computer (19).
2. the test device of compacted soil vaporous water according to claim 1 and lyotropic salt migration, which is characterized in that described It is also wrapped on one layer of heat preservation layer (3) after the outer wall of hollow sample loading bucket (1), hole (2) is also opened up on insulating layer (3), and it is hollow Hole (2) position on sample loading bucket (1) is corresponding, and other than the hole for being equipped with sensor, remaining hole is each equipped with heat preservation It fills in (20).
3. the test device of compacted soil vaporous water according to claim 1 and lyotropic salt migration, which is characterized in that described Flange (4) is solid ring flange, and there are many aperture (5) on solid flange.
4. the test device of compacted soil vaporous water according to claim 1 and lyotropic salt migration, which is characterized in that described Load bar (14) is telescopic load bar;Load bar (14) is connected through a screw thread with load plate (15).
5. the test device of compacted soil vaporous water according to claim 1 and lyotropic salt migration, which is characterized in that described Glass tube (7) lower part is additionally provided with barometric pipe (10).
6. any one uses moisture content in the test device testing soil, temperature and ion according to claim 1~5 Method, including some steps:
1) it after removing load plate (15), to sample loading bucket (1) filling experiment soil sample, after hitting reality by dry density point multilayer, will load Plate (15) is placed in soil body upper layer, after connecting with load bar (14);Then by circulating condensing pipe (17) height adjustment to sample loading bucket (1) at the about 1~3cm of staving top, the position of 1cm above load plate (16) subsequently coats multilayer rupture disk on staving top, Soil body top is sealed, is closed insulating box (11);
2) solution needed for testing will be added in Markov bottle (8), solution face in organic glass water-supply-pipe (7) is made to have 2cm distance;
3) according to required experimental condition, pass through temperature, the temperature of refrigeration system (16) of computer (19) setting insulating box (11) With the vibration frequency of vibrating motor (13), then start to test;
4) after on-test, temperature moisture content conductivity integrated transducer that computer end (7) is automatically stored every setting time The numerical value popped one's head on (6) opens the plug of insulating layer and at corresponding time point, with soil sampler same vertical plane circular hole In respectively take the soil of 3cm depth, after the completion of taking soil, the soil sample for backfilling homogenous quantities blocks circular hole, and clogs plug, and second is same from its Another hole in the section of height takes soil, and so on;
5) by the soil of taking-up, its inner end 2cm is selected, drying is milled, and it is configured to solution by Tu Shui ratio 1:5, is then allowed to stand filtering, Its each ion concentration is tested with ion chromatograph;
6) after the completion of testing, surveyed moisture content, temperature, ion concentration are depicted as curve.
7. it is according to claim 6 using moisture content in the test device testing soil, the method for temperature and ion, It is characterized in that, the setting time in the step 4) can be according to experiment condition, sets itself.
CN201910823309.3A 2019-09-02 2019-09-02 A kind of test device and its test method of compacted soil vaporous water and lyotropic salt migration Pending CN110455703A (en)

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CN111239374B (en) * 2020-03-25 2022-06-28 中铁二院成都勘察设计研究院有限责任公司 Saline soil salt expansion characteristic test device
CN112858152A (en) * 2021-01-15 2021-05-28 东南大学 Device for simulating sulfate corrosion of cement-based material in dry, cold and hot environments
CN114563288A (en) * 2022-01-14 2022-05-31 西安理工大学 Roadbed settlement test device suitable for vibration condition

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