CN210953697U - Testing equipment for soil density in severe cold area - Google Patents
Testing equipment for soil density in severe cold area Download PDFInfo
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- CN210953697U CN210953697U CN201921689818.3U CN201921689818U CN210953697U CN 210953697 U CN210953697 U CN 210953697U CN 201921689818 U CN201921689818 U CN 201921689818U CN 210953697 U CN210953697 U CN 210953697U
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Abstract
The utility model discloses a test equipment of severe cold area soil density, this equipment include a flowing back section of thick bamboo, iron plate and water-drain mast, a flowing back section of thick bamboo height is 50cm, and the leakage fluid dram's leakage fluid dram is 40cm apart from ground height, the iron plate welding is in flowing back bobbin base portion. The utility model discloses a severe cold area soil density testing arrangement is effectual has avoided the defect of fluid-discharge tube device in the test of traditional frozen soil density joint determination method in the engineering actual test, has realized the accurate test of frozen soil density in the geological survey of severe cold area, has guaranteed the accuracy of on-the-spot soil density test data. And guarantee is provided for the scientificity and the rigor of geological exploration. The testing device can be directly used for testing the density of frozen soil and lithologic soil.
Description
Technical Field
The utility model belongs to the technical field of the highway geotechnical test, a test equipment of severe cold area soil density is related to.
Background
In severe cold areas, the temperature is severe cold in winter and long in duration, the temperature is short and cool in summer, the temperature is relatively high, the freezing period is long, the solar radiation amount is large, and the sunshine is rich; it is often accompanied by strong wind. In the geological exploration process of severe cold areas, due to special geological conditions and climatic environments, frozen soil is often encountered in the exploration process, and a frozen soil sample testing device specified in industry specifications cannot completely meet the actual requirements on site, such as a soil density testing device and the requirements in a frozen soil density joint measurement method test of highway geotechnical test regulations, wherein a liquid discharge pipe device of a testing instrument consists of a liquid discharge cylinder, a siphon, a water stop clamp, a frozen soil sample and a measuring cylinder.
In geological exploration in severe cold areas, due to the special climatic environment, strong wind is often accompanied on site, a liquid discharge cylinder base given by highway geotechnical test regulations is in a round shape with the diameter of 15cm, in the site test in the strong wind environment, the stability of a test device can not meet the site test requirement, if the liquid discharge cylinder swings left and right, the accuracy of test data is seriously influenced, and even the collapse phenomenon of test equipment is generated; meanwhile, the diameter of a siphon pipe in the liquid discharge pipe device is small, and in a field frozen soil density test, after multiple tests, water in a liquid discharge cylinder is turbid and is accompanied by suspended particles and rotten vegetation, so that the siphon pipe is blocked at the position of a siphon opening in the liquid discharge cylinder, the discharge of the water in the liquid discharge cylinder during the test is influenced, and the accuracy of the measurement of the volume of discharged water in the test is greatly influenced. In the market of road instrument equipment sale, a liquid discharge cylinder in a liquid discharge pipe device sold and used is basically similar to the prior art, and the requirements of a frozen soil density field test in geological exploration in a severe cold region cannot be met; thirdly, in the frozen soil core soil density test in geological exploration, if the frozen soil test sample is small, the frozen soil test sample is not representative, and therefore the volume of the test sample is not suitable to be too small. Meanwhile, after 2-3 soil sample tests, the soil sample in the liquid discharge cylinder can not be melted in a short time, the accumulated height of the soil sample in the liquid discharge cylinder reaches more than 20 cm, the usable height of the liquid in the liquid discharge cylinder is 30-13 cm-17 cm, the requirement of repeated use can not be met, and in engineering field tests, due to the limitation of conditions, the standby of clean water in the liquid discharge cylinder is very difficult, so that the working efficiency of the field test is greatly reduced. In summary, the joint determination of the density of the frozen soil given in the road geotechnical test regulations requires a large gap from the actual test of the density of the frozen soil in the severe cold area, and the device for testing the density of the frozen soil, which meets the requirements of the road geotechnical test regulations and is suitable for the severe cold area, is urgently required by testers for actual engineering application.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a test equipment of severe cold area soil density, through the operation of on-the-spot actual test, for satisfying "highway geotechnological test regulation" requirement and being applicable to the frozen soil and the lithologic soil density test in severe cold area, following soil density testing arrangement can effectively solve the defect in traditional testing arrangements such as equipment stability, experimental repeatability and drainage volume accurate measurement among the field test.
The specific technical scheme is as follows:
the testing equipment for the soil density in the severe cold region comprises a liquid drainage cylinder 1, an iron plate 2 and a water drain pipe 3, wherein the height of the liquid drainage cylinder 1 is 50cm, the distance between a liquid discharge port of the water drain pipe 3 and the ground is 40cm, and the iron plate 2 is welded at the bottom of the liquid drainage cylinder.
Further, the thickness of the iron plate 2 is 3 mm.
Further, the contact opening of the drain pipe 3 and the drain cylinder 1 is a circle having a diameter of 5 cm.
Further, the outer opening of the drain pipe 3 is a 2cm circle.
Further, the iron plate 2 has a diameter of a circle of 30 cm.
Further, the diameter of the drainage cylinder is 15 cm.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a severe cold area soil density testing arrangement is effectual has avoided the defect of fluid-discharge tube device in the test of traditional frozen soil density joint determination method in the engineering actual test, has realized the accurate test of frozen soil density in the geological survey of severe cold area, has guaranteed the accuracy of on-the-spot soil density test data. And guarantee is provided for the scientificity and the rigor of geological exploration. The testing device can be directly used for testing the density of frozen soil and lithologic soil.
Drawings
FIG. 1 is a schematic structural diagram of a soil density testing device in a severe cold region.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the height of a liquid discharge cylinder 1 is designed to be 50cm, a liquid discharge port of a drain pipe 3 is 40cm away from the ground, the volume of the lower part of a water discharge port of the liquid discharge cylinder is increased, the repeated test problem of the density of frozen soil is effectively solved in the actual engineering test, the using amount of clean water in the test is saved, and the problem that the clean water is difficult to prepare in the field test is effectively solved.
The iron plate 2 with the thickness of 3mm is welded at the bottom of the liquid discharge cylinder 1, the contact area of the liquid discharge cylinder and the ground is increased, the stability of the soil density testing device is firm, and the phenomenon that wind power influences the accuracy of test data and the collapse of test equipment is avoided due to the fact that the bottom area is large and the iron plate is heavy in the on-site strong wind environment.
The contact opening of the drain pipe 3 and the drainage tube 1 is a circle with a diameter of 5cm, and the outer opening of the drain pipe 3 is a circle with a diameter of 2 cm. The increase of the inner buckle of the water drain pipe 3 can effectively remove suspended matters and rotten matters in the liquid discharge cylinder, ensure the stability of the liquid level of the liquid, ensure the accuracy of liquid removal and effectively ensure the accuracy of field test data.
A method for testing soil density in severe cold regions comprises the following steps:
And 2, slowly pouring clear water at the temperature of approximately 0 ℃ into the drainage cylinder to enable the water surface to exceed the top of the drainage pipe, slowly descending the water surface in the drainage cylinder, and weighing the quality of the drainage cylinder and the water when the water surface is stable and the drainage pipe does not discharge water any more.
And 3, gently placing the core sample into the drainage cylinder, enabling water in the drainage cylinder to flow into the measuring cylinder, immediately weighing the quality of the drainage cylinder, the water and the sample after the water flow stops, and simultaneously measuring and reading the volume of the water in the measuring cylinder to check the volume of the core sample.
And 4, when the rock core sample is fully dissolved into a loose state in the liquid discharge cylinder, clarifying, adding clear water to enable the water surface to exceed the water drain pipe, and weighing the mass of the liquid discharge cylinder, water and soil particles after water flow stops.
And 5, keeping the water surface stable in the test process, wherein the liquid discharging cylinder cannot shake during water discharging and rock core sample placing.
And the soil density calculation method is operated according to the relevant standard requirements.
When the traditional testing device is 30cm high in field test, a matched instrument, namely a measuring cylinder, needs to be placed in a side-inclined mode to receive clear water discharged from a water drain pipe, and the measuring cylinder is not favorable for stability of the measuring cylinder due to the side-inclined placement of the measuring cylinder and has the risk of leakage. The testing device can enable the matching instrument, namely the measuring cylinder, to stand to receive clear water discharged by the water drain pipe, and the measuring accuracy of the measuring cylinder is ensured. The aperture of the drain pipe 3 is increased to ensure the fluidity of the clear water discharged water. The diameter of the circular iron plate 2 is 30cm, so that the stability of the liquid discharge cylinder test room is ensured.
The above description is only a preferred embodiment of the present invention, the protection scope of the present invention is not limited thereto, and any person skilled in the art can obviously obtain simple changes or equivalent replacements of the technical solutions within the technical scope of the present invention.
Claims (4)
1. The device for testing the soil density in the severe cold area is characterized by comprising a liquid drainage cylinder (1), an iron plate (2) and a drain pipe (3), wherein the height of the liquid drainage cylinder (1) is 50cm, the distance between a liquid drainage port of the drain pipe (3) and the ground is 40cm, and the iron plate (2) is welded at the bottom of the liquid drainage cylinder.
2. The apparatus for testing soil density in severe cold regions according to claim 1, wherein the thickness of the iron plate (2) is 3 mm.
3. The soil density testing device for severe cold regions is characterized in that the contact opening of the drain pipe (3) and the drainage cylinder (1) is a circle with the diameter of 5 cm.
4. The soil density testing device for severe cold regions according to claim 1, wherein the outer opening of the drain pipe (3) is a 2cm circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921689818.3U CN210953697U (en) | 2019-10-10 | 2019-10-10 | Testing equipment for soil density in severe cold area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921689818.3U CN210953697U (en) | 2019-10-10 | 2019-10-10 | Testing equipment for soil density in severe cold area |
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| CN210953697U true CN210953697U (en) | 2020-07-07 |
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| CN201921689818.3U Active CN210953697U (en) | 2019-10-10 | 2019-10-10 | Testing equipment for soil density in severe cold area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567844A (en) * | 2019-10-10 | 2019-12-13 | 青海省交通科学研究院 | testing equipment and method for soil density in severe cold region |
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2019
- 2019-10-10 CN CN201921689818.3U patent/CN210953697U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567844A (en) * | 2019-10-10 | 2019-12-13 | 青海省交通科学研究院 | testing equipment and method for soil density in severe cold region |
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