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Low-temperature standardized sample preparation device and method for ice-soil mixture

A hybrid and low-temperature technology, applied in the field of geotechnical engineering, can solve problems such as failure to operate normally, inhomogeneous samples, and unsuitable preparation of ice-soil mixtures, etc., to achieve uniform performance, convenient operation, and good uniformity Effect

Inactive Publication Date: 2021-08-10
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the layered compaction method is used to prepare high ice-soil mixture samples, the last layer of soil often freezes itself, and it is not easy to bond with other layers uniformly, which will eventually lead to great inhomogeneity of the sample. The consolidation method is to add air-dried soil and distilled water to make a thin slurry larger than the liquid limit, pour it into the sample preparation cylinder, and apply a static load on the top to accelerate the consolidation of the soil sample, which is obviously not suitable for the preparation of ice-soil mixture. The prototype is suitable for normal temperature and cannot operate normally at low temperature

Method used

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  • Low-temperature standardized sample preparation device and method for ice-soil mixture
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  • Low-temperature standardized sample preparation device and method for ice-soil mixture

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Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 A low-temperature standardized sample preparation device for ice-soil mixture shown includes a loading part 1 , a constant temperature box 2 , a sample preparation bucket 3 and a temperature control part 4 . The loading part 1 is installed on the supporting frame 13, which stands on the supporting platform 14, and the stress ring 5 is set under the loading part 1, and the actual loading distance can be calculated through the value on the ring and the actual loading rate, that is, the telescopic length of the telescopic rod . The lower part is an incubator 2, and a sample preparation device is placed in the incubator 2. There is an interlayer inside the box, and a spiral diversion tube 7 is placed in the interlayer, so that the incubator 7 can pass through to cool down the interior of the incubator 2. The guide tube 7 is connected to the external temperature control component 4 .

[0031] The loading part 1 includes a control module and a loading modul...

Embodiment 2

[0035] Utilize the device described in embodiment 1 to carry out the low temperature standardization sample preparation of ice-soil mixture, concrete steps are as follows:

[0036] At the beginning of sample preparation, the telescopic rod is retracted to the bottom of the stress ring 5, and the top of the incubator 2 is opened through the first handle 211 and the second handle 212, and the ice-soil mixture is loaded into the sample barrel 3, and then the incubator 2 is closed; 1 Obtain the loading signal through the loading setting, and transmit the loading signal to the stress ring 5; the stress ring 5 calculates and controls the telescopic length of the telescopic rod 6 according to the loading signal, and uses the telescopic function of the telescopic rod 6 to adjust the ice- The soil mixture was compressed for sample preparation. Such as figure 2 As shown, the pressure of the telescopic rod 6 acts on the briquetting block 8, and the pressure of the telescopic rod 6 is r...

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Abstract

The invention relates to the field of geotechnical engineering, and particularly discloses a low-temperature standardized sample preparation device and method for an ice-soil mixture. According to the layered sample pressing device for preparing the ice-soil mixture sample for the temperature-control triaxial test, the compaction height and the level of the end face of each layer of soil sample can be accurately controlled when the device is used for sample preparation, the uniformity of the ice-soil mixture sample prepared in a low-temperature environment is better, so that the test error of the temperature-control triaxial test is small, and the test result is more accurate and reliable; and the operation is convenient, and the preparation efficiency of the sample is higher.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a low-temperature standardized sample preparation device and a sample preparation method for ice-soil mixtures. Background technique [0002] Both the Sichuan-Tibet Railway under construction and the G318 Highway under construction pass through the distribution area of ​​the largest marine glacier group in my country. Under the current environmental conditions of continuous warming, extra-large glacial geological disasters in this area occur frequently and suddenly, and their scale, destructive ability, The scope of damage is often several times that of ordinary disasters, leading to large-scale disasters, not only causing huge casualties, but also destroying years of construction achievements, endangering the safety of major projects. As the main solid source of glacial geological disasters, moraine soil is the product of rapid mixed accumulation of boulders, gravel, grave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 王姣崔鹏王睿刘振兴李长冬
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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