CN203587417U - Device for preparing saline soil test piece under freezing-thawing cycle condition - Google Patents
Device for preparing saline soil test piece under freezing-thawing cycle condition Download PDFInfo
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- CN203587417U CN203587417U CN201320793967.0U CN201320793967U CN203587417U CN 203587417 U CN203587417 U CN 203587417U CN 201320793967 U CN201320793967 U CN 201320793967U CN 203587417 U CN203587417 U CN 203587417U
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Abstract
The utility model provides a device for preparing a saline soil test piece under a freezing-thawing cycle condition. The device comprises a test piece tank and an electronic control system, wherein a sample cylinder in the test piece tank consists of two half-round plastic cylinders, and is externally fixed by a round ring; two fixing devices are arranged at the top and bottom of the sample cylinder, respectively, and are used for fixing a water-pervious stone and filter paper on the sample cylinder or for fixing the sample cylinder on an upper thermal insulating plate and a lower thermal insulating plate; an upper temperature control layer is used for simulating the temperature variation of a natural environment, a lower temperature control layer is used for simulating the temperature change in a soil body, and meanwhile, a water replenishing device is fixed at the bottom of the lower thermal insulating plate and is used for testing the replenishment of underground moisture and salinity to saline soil in a freezing-thawing cycle project. After the test piece is prepared, a tri-axial shear force instrument is utilized for carrying out compressive strength parameter measurement, thus providing a reference to the engineering construction of saline soil areas.
Description
Technical field
The utility model relates to the preparation of saliferous clay test specimen, is particularly useful for the preparation of saliferous clay test specimen and the application of test under freeze thawing cycling condition.
Background technology
Saliferous clay is distributed more widely in the Northwest, needs along with engineering construction, the engineering construction quantity of saline soil area is also in continuous growth, because saliferous clay has comparatively special character, experience is repeatedly after seasonal difference variation, directly to engineering, causes the problems such as frost boiling, molten sunken, corrosion, such as Qinghai-Tibet Railway, the Lan-xing Railway etc., so carry out the research of saliferous clay to the harm of engineering or improvement saliferous clay or scientific utilization saliferous clay, seem very necessary.
In the engineering properties of saliferous clay, compressive strength is one of topmost character, in current saliferous clay strength detection, the assay method that laboratory is conventional, in a certain amount of soil, requirement by design adds a certain proportion of salinity, it is carried out to shelving 24h, then pack sample preparation cylinder into and divide three layers to hit real sample preparation, after sample preparation completes, from sample preparation cylinder, take out, after sample is good with diaphragm seal, put into cryogenic box, requirement set temperature by test, carries out thawing cyclic test, then studies the relation of test specimen compressive strength and freezing-thawing cycles.In this assay method, main shortcoming is that the salt content of test specimen inside is more even, and temperature variation is also from outside to inside, there is no supplementing of salinity and moisture, not too conforms to the forming process of actual physical environment medium salting soil.And in Practical Project, the different depth salt content of saliferous clay is different, and salt content difference is also larger, temperature is progressively changed repeatedly and circulates to low temperature by top high temperature, this physical environment that namely extraneous circular temperature loads and day and night temperature change.When ambient temperature is higher, by soil suction effect, draw salinity and moisture along with progressively rising in the space between the soil body, but after moisture evaporation, salinity is just left in the soil body of top, thus formation saliferous clay; When temperature is lower, Salts In Salt-affected Soil crystallization causes soil body generation frost heave, to engineering, damages.
The utility model is saliferous clay test material preparation device under freeze thawing cycling condition, is by the forming process of lab simulation actual environment medium salting soil, and saliferous clay is carried out to test material preparation, then utilizes triaxial shear equipment to carry out the mensuration of compressive strength.Judgement to the engineering properties of saliferous clay provides science data, has important more practical value.
Summary of the invention
The purpose of this utility model is: saliferous clay test material preparation device under freeze thawing cycling condition is provided, saliferous clay is carried out to test material preparation, the Strength Changes after saliferous clay experience thawing circulation after saliferous clay or improvement is made to comprehensive evaluation analysis.
The purpose of this utility model is achieved in that a kind of preparation facilities that carries out saliferous clay test specimen under freeze thawing cycling condition, by test specimen case 1, gland bonnet 2, water supply tank 3, upper temp detector 4, upper temp starting switch 5, upper temp closing switch 6, temperature of lower detector 7, temperature of lower starting switch 8, temperature of lower closing switch 9, communicating pipe 10, switch for vent port 11, lower constant temperature oven 12, upper constant temperature oven 13, sample coupon 14, upper temp key-course 15, fixed head 16, top thermal insulative board 17, sample device 18, bottom thermal insulative board 19, hutch water device 20, temperature of lower key-course 21, electronic control system 22, test specimen tube 23, fixedly iron hoop 24 forms, device is comprised of for 22 casees test specimen case 1 and electronic control system, upper top at test specimen case 1 arranges gland bonnet 2, going to the bottom arranges switch for vent port 11, minute left and right compartment in test specimen case 1, the upper top of left compartment arranges gland bonnet 2, and the temperature key-course 21 of upper temp key-course 15 and bottom is set in gland bonnet 2 bottoms, and electronic control system 22 is set in right compartment, wherein in the temperature key-course 21 of upper temp key-course 15 and bottom, lay top thermal insulative board 17 and bottom thermal insulative board 19, the test specimen tube 23 that is fixed wtih iron hoop 24 is set in the middle of top thermal insulative board 17 and bottom thermal insulative board 19, wherein in the bottom of bottom thermal insulative board 19, be fixed wtih hutch water device 20, hutch water device 20 connects pipe 10, at the top and bottom of sample device 18 that the test specimen tube 23 of sample coupon 14 is housed, fixed head 16 is set respectively, is arranged on the affixed bottom of fixed head 16 thermal insulative board 19 that the affixed top of top fixed head 16 thermal insulative board 17 is arranged on bottom, upper temp key-course 15 connects upper constant temperature oven 13, the temperature key-course 21 of bottom connects lower constant temperature oven 12, upper temp detector 4 is communicated with the temperature key-course 21 of upper temp key-course 15 and bottom respectively with temperature of lower detector 7, monitor its inner temperature variation, wherein upper temp detector 4, temperature of lower detector 7, lower constant temperature oven 12 and upper constant temperature oven 13 difference connecting electronic control system 22, upper top electronic control system 22 casees arranges water supply tank 3, the observation port of the button of uniform upper temp starting switch 5, upper temp closing switch 6, temperature of lower starting switch 8 and temperature of lower closing switch 9 and upper temp detector 4 and temperature of lower detector 7 on the casing of electronic control system 22 casees.
Principle of work of the present utility model: be subject under field conditions (factors) the effect of the factors such as season alternation and temperature variation in order to simulate natural salt dirting soil, salinity, the moisture situation of change in the soil body, also study better saliferous clay in freeze thawing cyclic process simultaneously, the Strength Changes of saliferous clay, so developed the test material preparation device of saliferous clay under freeze thawing cycling condition.This device is in order to carry out better the measurement of test specimen compressive strength parameter value on triaxial shear equipment, made the Φ 10cm supporting with quiet three axles by oneself, it is highly the test specimen tube of 20cm, this test specimen tube is to be combined by two semi arches, the material adopting is plastics, can in freeze thawing cyclic process, play insulation effect like this, guarantee only to occur in test the temperature variation of vertical one dimension.Outside has an iron hoop to fix, and this iron hoop screws up together with screw, during sampling, can open annulus, unloads test specimen tube.During sample preparation, in test specimen tube inside, smear vaseline, can play smooth effect like this, after freeze thawing circulation finishes, easily sampling, also can reduce sample and destroy, and shows technical progress.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
The structural representation that accompanying drawing 1 is this device;
As shown in the figure: install by test specimen case-1, gland bonnet-2, water supply tank-3, upper temp detector-4 upper temp starting switch-5, upper temp closing switch-6, temperature of lower detector-7, temperature of lower starting switch-8, temperature of lower closing switch-9, communicating pipe-10, switch for vent port-11, upper constant temperature oven-12, lower constant temperature oven-13.
The plan structure schematic diagram that accompanying drawing 2 is this device;
As shown in the figure: sample coupon-14, water supply tank-3.
Accompanying drawing 3 is the perspective structure schematic diagram of this device test specimen case;
As shown in the figure: gland bonnet-2, upper temp key-course-15, fixed head-16, thermal insulative board-17, top, sample device-18, thermal insulative board-19, bottom, hutch water device-20, temperature key-course-21, electronic control system-22.
The perspective structure schematic diagram that accompanying drawing 4 is this device test specimen tube;
As shown in the figure: test specimen tube-23, fixing iron hoop-24.
The fixed head schematic diagram that accompanying drawing 5 is this device test specimen tube;
As shown in the figure: fixed head-16.
The hutch water device structural representation that accompanying drawing 6 is this device;
As shown in the figure: hutch water device-20.
Embodiment
The utility model is described further by reference to the accompanying drawings.
Embodiment
1) device forms:
The utility model device is comprised of test specimen case and electronic control system; Upper top at test specimen case arranges gland bonnet, going to the bottom arranges switch for vent port; Minute left and right compartment in test specimen case, the upper top of left compartment arranges gland bonnet, and the temperature key-course of upper temp key-course and bottom is set in gland bonnet bottom, in right compartment, electronic control system is set; Wherein in the temperature key-course of upper temp key-course and bottom, lay top thermal insulative board and bottom thermal insulative board, the test specimen tube that is fixed wtih iron hoop is set in the middle of top thermal insulative board and bottom thermal insulative board, its thermal insulative board bottom, middle and lower part is fixed wtih hutch water device, and hutch water device connects drainpipe; At the top and bottom that the test specimen tube of test specimen is housed, fixed head is set respectively, wherein the fixed head of top and bottom is separately fixed on top thermal insulative board and bottom thermal insulative board; Upper temp key-course connects upper constant temperature oven, the temperature key-course of bottom connects lower constant temperature oven, upper temp detector is communicated with the temperature key-course of upper temp key-course and bottom respectively with temperature of lower detector, monitor its inner temperature variation, wherein upper temp detector, temperature of lower detector, lower constant temperature oven and upper constant temperature oven difference connecting electronic control system; At the upper top of electronic control system case, water supply tank uniform the button of upper temp starting switch, upper temp closing switch, temperature of lower starting switch and temperature of lower closing switch and observation port of upper temp detector and temperature of lower detector on the casing of electronic control system case are set.
2) choose the soil sample of need measuring, under indoor condition of necessarily hitting real merit, measure optimum moisture content and the dry density of this soil body.Requirement by test is sieved soil sample, then adds a certain amount of water, soil sample mix evenly after, place in closed container and seal after shelving 24h, relative compaction on request, is necessarily hitting under the condition of real merit, divides three layers and carry out sample preparation in sample preparation cylinder.Before sample preparation, sample preparation cylinder, to being combined, vaseline is smeared in inside, is beneficial to after freeze thawing circulation convenient therefrom sampling; After sample preparation completes, at the top and bottom of test specimen tube, permeable stone and filter paper are installed respectively, and by stationary installation (seeing accompanying drawing 5), they are fixed together.
3) test specimen tube is put into test material preparation case by relevant position, then top stationary installation is fixed on the thermal insulative board of top, certain sealing closely.Upper space at top thermal insulative board is upper temp key-course region, and this region is connected with constant temperature oven with a temperature monitor, according to the temperature variations of this area, ultimate temperature value is set, for the temperature variation under simulating natural environment condition.Bottom at test specimen is also fixed on test specimen on the thermal insulative board of bottom, the hutch water device that thermal insulative board bottom, bottom is fixed wtih is concavo-convex dividing plate (being uniform emboss pit on hutch water device), adopt concavo-convex dividing plate to have two objects, one for providing the temperature of the bottom soil body, simulate in actual physical environment the temperature of inside soil body.Another is according to actual conditions, and for test specimen provides salinity and moisture, simulated groundwater is the impact on saliferous clay in freeze thawing cyclic process.The temperature key-course of bottom is connected with lower constant temperature oven with temperature monitor, according to the temperature conditions of soil body bottom in freeze thawing cyclic process, the temperature of bottom key-course is set, and is traditionally arranged to be 5 ℃.The hutch water device connecting regulates moisturizing by observing the height of water level of communicating pipe, makes water level just contact the bottom of test specimen.Requirement according to test to freezing-thawing cycles, arranges freezing-thawing cycles.Tested after end, taken out on request sample, carried out compressive strength determination, differentiated the needs that can compressive strength parameter meet engineering.
The test specimen case of the utility model device, upper constant temperature oven, lower constant temperature oven consist of stainless steel, and upper and lower thermal insulative board is made by insulation material.
The test specimen tube of the utility model device is to be combined by two semi arches, plastic material, consists of.
Range of application of the present utility model
1) natural salt dirting soil is carried out to freeze thawing circulating analog, analyze the relation in the rear intensity of thawing circulation and freezing-thawing cycles, and the situation of change of correlation parameter.
2) natural frozen soil is carried out to freeze thawing circulating analog, analyze the variation relation of frozen soil intensity and freezing-thawing cycles in thawing cyclic process, and the situation of change of correlation parameter.
3) saliferous clay after improvement is carried out to freeze thawing circulating analog, analyze the soil sample of the rear saliferous clay of improvement, can the relation of intensity freezing-thawing cycles in freeze thawing cyclic process, meet engineering construction to the intensity of improvement saliferous clay and require to make comprehensive evaluation.
Claims (4)
1. a saliferous clay test material preparation device under freeze thawing cycling condition, it is characterized in that: by test specimen case (1), gland bonnet (2), water supply tank (3), upper temp detector (4), upper temp starting switch (5), upper temp closing switch (6), temperature of lower detector (7), temperature of lower starting switch (8), temperature of lower closing switch (9), communicating pipe (10), switch for vent port (11), lower constant temperature oven (12), upper constant temperature oven (13), sample coupon (14), upper temp key-course (15), fixed head (16), top thermal insulative board (17), sample device (18), bottom thermal insulative board (19), hutch water device (20), temperature of lower key-course (21), electronic control system (22), test specimen tube (23), fixedly iron hoop (24) forms,
Device is comprised of test specimen case (1) and electronic control system (22) case; On the upper top of test specimen case (1), gland bonnet (2) is set, going to the bottom arranges switch for vent port (11); Minute left and right compartment in test specimen case (1), the upper top of left compartment arranges gland bonnet (2), and the temperature key-course (21) of upper temp key-course (15) and bottom is set in gland bonnet (2) bottom, and electronic control system (22) is set in right compartment; Wherein in the temperature key-course (21) of upper temp key-course (15) and bottom, lay top thermal insulative board (17) and bottom thermal insulative board (19), the test specimen tube (23) that is fixed wtih iron hoop (24) is set in the middle of top thermal insulative board (17) and bottom thermal insulative board (19), wherein in the bottom of bottom thermal insulative board (19), be fixed wtih hutch water device (20), hutch water device (20) connects pipe (10); At the top and bottom of sample device (18) that the test specimen tube (23) of sample coupon (14) is housed, fixed head (16) is set respectively, wherein be arranged on fixed head (16) the affixed top thermal insulative board (17) at top, be arranged on fixed head (16) the affixed bottom thermal insulative board (19) of bottom; Constant temperature oven (13) in upper temp key-course (15) connection, the temperature key-course (21) of bottom connects lower constant temperature oven (12), upper temp detector (4) is communicated with the temperature key-course (21) of upper temp key-course (15) and bottom respectively with temperature of lower detector (7), monitor its inner temperature variation, wherein upper temp detector (4), temperature of lower detector (7), lower constant temperature oven (12) and upper constant temperature oven (13) difference connecting electronic control system (22); Upper top at electronic control system (22) case arranges water supply tank (3), the observation port of the button of uniform upper temp starting switch (5), upper temp closing switch (6), temperature of lower starting switch (8) and temperature of lower closing switch (9) and upper temp detector (4) and temperature of lower detector (7) on the casing of electronic control system (22) case.
2. install according to claim 1, it is characterized in that: the upper uniform emboss pit of the hutch water device of device (20).
3. install according to claim 1, it is characterized in that: two semi arches of the test specimen tube of device (23) consist of plastic material.
4. install according to claim 1, it is characterized in that: the test specimen case (1) of device, lower constant temperature oven (12) and upper constant temperature oven (13) consist of stainless steel, top thermal insulative board (17) and bottom thermal insulative board (19) are made by insulation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320793967.0U CN203587417U (en) | 2013-12-04 | 2013-12-04 | Device for preparing saline soil test piece under freezing-thawing cycle condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320793967.0U CN203587417U (en) | 2013-12-04 | 2013-12-04 | Device for preparing saline soil test piece under freezing-thawing cycle condition |
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| CN203587417U true CN203587417U (en) | 2014-05-07 |
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| CN201320793967.0U Expired - Fee Related CN203587417U (en) | 2013-12-04 | 2013-12-04 | Device for preparing saline soil test piece under freezing-thawing cycle condition |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158437A (en) * | 2015-08-03 | 2015-12-16 | 中国矿业大学(北京) | Permafrost slope model test device |
| CN105372284A (en) * | 2015-12-04 | 2016-03-02 | 长安大学 | Device and method for testing frost heaving parameter of soil under standard compaction work |
| CN106501489A (en) * | 2016-12-09 | 2017-03-15 | 长安大学 | Coarse Saline salt is swollen and molten sunken multifunction test device |
| CN107064474A (en) * | 2017-03-22 | 2017-08-18 | 青海大学 | A kind of swollen characteristic test apparatus of the salt of salinized soil |
| CN107271473A (en) * | 2017-08-22 | 2017-10-20 | 中国科学院寒区旱区环境与工程研究所 | The indoor simulated system that frozen-thaw process influences on soil environment |
| CN110018199A (en) * | 2019-03-18 | 2019-07-16 | 浙江大学 | A kind of method that can measure material electromagnetic parameter in the device and Frozen-thawed cycled of test material electromagnetic parameter in Frozen-thawed cycled |
-
2013
- 2013-12-04 CN CN201320793967.0U patent/CN203587417U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158437A (en) * | 2015-08-03 | 2015-12-16 | 中国矿业大学(北京) | Permafrost slope model test device |
| CN105372284A (en) * | 2015-12-04 | 2016-03-02 | 长安大学 | Device and method for testing frost heaving parameter of soil under standard compaction work |
| CN106501489A (en) * | 2016-12-09 | 2017-03-15 | 长安大学 | Coarse Saline salt is swollen and molten sunken multifunction test device |
| CN107064474A (en) * | 2017-03-22 | 2017-08-18 | 青海大学 | A kind of swollen characteristic test apparatus of the salt of salinized soil |
| CN107271473A (en) * | 2017-08-22 | 2017-10-20 | 中国科学院寒区旱区环境与工程研究所 | The indoor simulated system that frozen-thaw process influences on soil environment |
| CN110018199A (en) * | 2019-03-18 | 2019-07-16 | 浙江大学 | A kind of method that can measure material electromagnetic parameter in the device and Frozen-thawed cycled of test material electromagnetic parameter in Frozen-thawed cycled |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20141204 |
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| EXPY | Termination of patent right or utility model |