CN108333329A - The multifunction test device of on-site measurement sulfate-salinized soil salt expandability - Google Patents
The multifunction test device of on-site measurement sulfate-salinized soil salt expandability Download PDFInfo
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- CN108333329A CN108333329A CN201810131512.XA CN201810131512A CN108333329A CN 108333329 A CN108333329 A CN 108333329A CN 201810131512 A CN201810131512 A CN 201810131512A CN 108333329 A CN108333329 A CN 108333329A
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Abstract
The invention belongs to soil test fields in civil engineering, and in particular to a kind of multifunction test device of on-site measurement sulfate-salinized soil salt expandability.The device includes Tu Chi, partition board, soil pressure cell, temperature sensor, vertical displacement observation post and plastic tube.The cross section of the Tu Chi is rectangle, is encircled a city by the reinforced concrete wall on adjacent both sides and the masonry wall on adjacent both sides, divider upright is placed between two long sides of Tu Chi, and Jiang Tuchi is divided into compartment.Soil pressure cell is embedded on the inside of native pond pool wall, and temperature sensor is embedded in the tested soil sample of each compartment, and vertical displacement observation post is vertically set on compartment center.It is provided with through-hole on the short side bottom pool wall of two, native pond, which is connect with the plastic tube equipped with metabisulfite solution, and solution is penetrated by the middle sand bedding course in native bottom of pond portion in tested soil sample.The present apparatus can be used for measuring different temperatures, different sidewise restraint conditions, the expansion rate and expansive force of different type salinized soil simultaneously.
Description
Technical field
The invention belongs to soil test fields in civil engineering, and in particular to a kind of on-site measurement sulfate-salinized soil salt expandability
Multifunction test device.
Background technology
The main reason for brining ground foundation generation expansion is Na in soil2SO4It is crystallized and generating body when temperature or humidity change
Product expansion.Na2SO4Solubility with temperature variation, when temperature is lower by height, solubility becomes smaller, and makes part Na2SO4Crystallization analysis
Go out；On the other hand, because moisture evaporation water content of soil reduces, it can also make salt content saturation in water and crystallize and be precipitated.Na2SO4Crystallization
When, in conjunction with 10 hydrones, volume expansion adverse consequences can be caused up to 3 times or more.
The salt of sulfate-salinized soil is swollen entirely different with the mechanism of intumescence of swelled ground, the salinized soil with salt expandability, mostly difficult
To take undisturbed soil to carry out laboratory test, and laboratory test can not simulate ready-made temperature, damp condition, therefore, evaluate sulfuric acid
The salt expandability of brining ground foundation is measured with field test based on its salt expansive force and Salt heaving rate.
Existing sulfate-salinized soil salt expandability field testing procedure is the metabisulfite solution for a kind of soil body, fixed concentration
With set under a kind of constraints, test function is single, and efficiency is low.In order to solve existing sulfate-salinized soil salt expandability scene
Test method there are the problem of, the present invention proposes a kind of multifunction test device of on-site measurement sulfate-salinized soil salt expandability.
Invention content
Present invention aim to solve the problems, such as the measurement of sulfate-salinized soil salt expandability, pass through a kind of on-site measurement sulfuric acid
Salinized soil salt expandability multifunction test device simulation various boundary conditions, various concentration metabisulfite solution under the conditions of to not
The expansion rate and expansive force of same type soil, the salt expandability to evaluate brining ground foundation provide theories integration.
The object of the present invention is achieved like this.
The present invention provides a kind of multifunction test device of on-site measurement sulfate-salinized soil salt expandability, including Tu Chi, every
Plate, soil pressure cell, temperature sensor, vertical displacement observation post and plastic tube；The bottom of pond of the Tu Chi is distinguished from bottom to up
For concrete leveling layer and middle sand bedding course, the cross section of the Tu Chi is rectangle, by adjacent both sides reinforced concrete wall and
The masonry wall on adjacent both sides surrounds, wherein simultaneously compaction in layers of banketing on the outside of the masonry wall of the native pond long side of composition；The partition board
Quantity is no less than 2 pieces, is vertically disposed between two long sides of Tu Chi, Jiang Tuchi is divided into no less than 3 compartments；Described
Soil pressure cell is embedded on the inside of native pond pool wall, is uniformly distributed along the peripheries Tu Chi and short transverse；The temperature sensor is embedding
In the tested soil sample of each compartment；The vertical displacement observation post is vertically set on compartment center；It is two short in native pond
Side, which is located on the pool wall of middle sand bedding course bottom position, is provided with through-hole, which connects with the plastic tube equipped with metabisulfite solution
It connects.
Preferably, the soil pressure cell being embedded on the inside of native pond pool wall is 500mm along the spacing of depth direction.
Preferably, an embedding temperature sensor near the soil pressure cell.
Preferably, the thickness of the reinforced concrete wall and masonry wall is 200-300mm.
Preferably, the thickness of the concrete leveling layer is 70-120mm, and the thickness of middle sand bedding course is 40-70mm.
Preferably, the original soil under the concrete leveling layer needs to be compacted.
Compared with prior art, the present invention has the following advantages：
(1) expansion rate and expansive force of the sulfate-salinized soil under various boundary conditions can preferably be measured.Such as at this
Three kinds of constraintss are related in invention, wherein rigid constraint condition is reinforced concrete wall, and semi-rigid constraints is back
There is the masonry wall to banket；Flexible constraint condition is back without the masonry wall that bankets.
(2) expansive force of the salinized soil at different buried depth can be measured simultaneously.Such as the present invention relates at different buried depth
Soil pressure cell, be embedded on the inside of native pond pool wall, be uniformly distributed along the peripheries Tu Chi and short transverse.
(3) can measure simultaneously the three classes soil body (clay, silt, sand) in the case that identical salt content the swollen characteristic of salt.
Such as three compartments are related in the present invention, it is a kind of soil body (clay or silt or sand) in each compartment, in plastic tube
Metabisulfite solution equipped with fixed concentration can penetrate into three compartments.
(4) changing rule of the sulfate-salinized soil expansion characteristics under condition of different temperatures with temperature and time can be measured；
(5) present apparatus is simple in structure, multiple functional, and operation is easy, easy for construction.
Description of the drawings
Fig. 1 is the multifunction test device vertical view of on-site measurement sulfate-salinized soil salt expandability of the present invention；
Fig. 2 is the multifunction test device front view of on-site measurement sulfate-salinized soil salt expandability of the present invention；
Fig. 3 is the multifunction test device partial, detailed view of on-site measurement sulfate-salinized soil salt expandability.
Wherein：1. reinforced concrete wall；2. masonry wall；3 concrete leveling layers；Sand bedding course in 4.；5. partition board；6. soil pressure
Box；7. temperature sensor；8. vertical displacement observation post；9. plastic tube；10. compartment；11. through-hole
Specific implementation mode
With reference to embodiment and attached drawing, the present invention will be further described.
Referring to Fig. 1, Fig. 2 and Fig. 3, the multifunction test device of the on-site measurement sulfate-salinized soil salt expandability in the present embodiment
It constitutes as follows.
The multifunction test device of on-site measurement sulfate-salinized soil salt expandability includes Tu Chi, partition board 5, soil pressure cell 6, temperature
Sensor 7, vertical displacement observation post 8 and plastic tube 9.
The bottom of pond of the Tu Chi is respectively concrete leveling layer 3 and middle sand bedding course 4, the cross section of the Tu Chi from bottom to up
It for rectangle, is surrounded by the reinforced concrete wall 1 on adjacent both sides and the masonry wall 2 on adjacent both sides, wherein constituting native pond long side
The outside of masonry wall 2 is banketed and compaction in layers.In the present embodiment, the thickness of reinforced concrete wall 1 is 250mm, masonry wall 2
Thickness is 240mm, and the thickness of concrete leveling layer 3 is 100mm, and the thickness of middle sand bedding course 4 is 60mm, and native pond total length is 6m,
Height is 2m.In native pond manufacturing process, the original soil under concrete leveling layer 3 needs to be compacted.
The quantity of the partition board 5 is 2 pieces, is vertically disposed between two long sides of Tu Chi, Jiang Tuchi is divided into 3 sizes
Identical compartment 10, each compartment 10 are 2m along the length of native pond long side.
The soil pressure cell 6 is embedded on the inside of native pond pool wall, is uniformly distributed along the peripheries Tu Chi and short transverse.This implementation
In example, the spacing along depth direction is 500mm.
The temperature sensor 7 is embedded in the tested soil sample of each compartment 10.In the present embodiment, each soil pressure
An embedding temperature sensor 7 near box 6.
The vertical displacement observation post 8 is vertically set on 10 center of compartment.
It is provided with through-hole 11 on the pool wall that two, native pond short side is located at 4 bottom position of middle sand bedding course, the through-hole 11 and dress
There is the plastic tube 9 of metabisulfite solution to be connected.During the test, the outer boundary of the sodium sulphate solution in plastic tube keeps steady
It is fixed.
During the test, it keeps the sodium sulphate liquid level of solution elevation in plastic tube 9 constant, injects certain density sulfuric acid
Receive solution, sand bedding course 4 during solution passes through is stretched into the different types of soil in top.Eventually form certain density Restrain Method of Sulphate Salty
Soil.Soil temperature is recorded by temperature sensor 7, the expansive force of different depth is recorded by soil pressure cell 6, is observed by vertical displacement
Mark post 8 records swell increment.Using the device, various soil mass, varying environment condition can be measured simultaneously in a natural season
Under the swollen characteristic of salt.
Claims (6)
1. a kind of multifunction test device of on-site measurement sulfate-salinized soil salt expandability, which is characterized in that including Tu Chi, partition board
(5), soil pressure cell (6), temperature sensor (7), vertical displacement observation post (8) and plastic tube (9)；The bottom of pond of the Tu Chi
It is respectively concrete leveling layer (3) and middle sand bedding course (4) from bottom to up, the cross section of the Tu Chi is rectangle, by adjacent two
The reinforced concrete wall (1) on side and the masonry wall (2) on adjacent both sides surround, wherein constituting the outer of the masonry wall (2) of native pond long side
Side is banketed and compaction in layers；The quantity of the partition board (5) is no less than 2 pieces, is vertically disposed between two long sides of Tu Chi, will be native
Pond is divided into no less than 3 compartments (10)；The soil pressure cell (6) is embedded on the inside of native pond pool wall, along the peripheries Tu Chi and
Short transverse is uniformly distributed；The temperature sensor (7) is embedded in the tested soil sample of each compartment (10)；Described is vertical
Displacement observation mark post (8) is vertically set on compartment (10) center；Two, native pond, short side is located at middle sand bedding course (4) bottom position
Pool wall on be provided with through-hole (11), which is connect with equipped with the plastic tube (9) of metabisulfite solution.
2. a kind of multifunction test device of on-site measurement sulfate-salinized soil salt expandability according to claim 1, feature
It is, the soil pressure cell (6) being embedded on the inside of native pond pool wall is 500mm along the spacing of depth direction.
3. a kind of multifunction test device of on-site measurement sulfate-salinized soil salt expandability according to claim 1, feature
It is, an embedding temperature sensor near the soil pressure cell (6).
4. a kind of multifunction test device of on-site measurement sulfate-salinized soil salt expandability according to claim 1, feature
It is, the thickness of the reinforced concrete wall (1) and masonry wall (2) is 200-300mm.
5. a kind of multifunction test device of on-site measurement sulfate-salinized soil salt expandability according to claim 1, feature
It is, the thickness of the concrete leveling layer (3) is 70-120mm, and the thickness of middle sand bedding course (4) is 40-70mm.
6. a kind of multifunction test device of on-site measurement sulfate-salinized soil salt expandability according to claim 1, feature
It is, the original soil under the concrete leveling layer (3) needs to be compacted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810131512.XA CN108333329B (en) | 2018-02-09 | 2018-02-09 | Multifunctional test device for on-site determination of salt expansion of sulfate saline soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810131512.XA CN108333329B (en) | 2018-02-09 | 2018-02-09 | Multifunctional test device for on-site determination of salt expansion of sulfate saline soil |
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| CN108333329A true CN108333329A (en) | 2018-07-27 |
| CN108333329B CN108333329B (en) | 2020-08-11 |
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| CN201810131512.XA Active CN108333329B (en) | 2018-02-09 | 2018-02-09 | Multifunctional test device for on-site determination of salt expansion of sulfate saline soil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239374A (en) * | 2020-03-25 | 2020-06-05 | 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 |
| CN117871267A (en) * | 2024-03-12 | 2024-04-12 | 西南交通大学 | Consolidation apparatus and implementation method for non-confined condition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239374A (en) * | 2020-03-25 | 2020-06-05 | 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 |
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| CN117871267A (en) * | 2024-03-12 | 2024-04-12 | 西南交通大学 | Consolidation apparatus and implementation method for non-confined condition |
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| CN108333329B (en) | 2020-08-11 |
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