Multifunctional road soil roadbed freezing and thawing circulating test device

A freeze-thaw cycle and test device technology, which is applied in soil material testing, roads, roads, etc., can solve problems such as unsatisfactory, unacceptable ground water supply, and unsatisfactory mechanical index test requirements, etc., to achieve scientific and reliable test results. Design The parameters are accurate and reasonable, and the effect of reducing the error of the test system
CN101923085AActive Publication Date: 2010-12-22CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CCCC SECOND HIGHWAY CONSULTANTS CO LTD
Publication Date
2010-12-22

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Abstract

The invention discloses a multifunctional road soil roadbed freezing and thawing circulating test device. During a freezing and thawing circulating test, six samples are placed among six top plate heat exchangers and six bottom plate heat exchangers of a constant temperature system; the six top plate heat exchangers and the six bottom plate heat exchangers are respectively connected in parallel with a refrigeration circulating machine set; a moisture replenishment system is connected with the bottoms of six roadbed soil samples; a temperature sensor and a soil moisture sensor of a test systemare respectively buried in the six roadbed soil samples of the samples; a displacement sensor of the test system is in contact with the top of the top plate heat exchanger of a temperature control system; and the temperature sensor, the displacement sensor and the soil moisture sensor are connected with an acquisition channel of a data acquisition instrument of a data acquisition system. The multifunctional road soil roadbed freezing and thawing circulating test device has the advantages of simple structure, convenient use, high test precision and reliable result, can better complete the parallel test measurement of the engineering design parameters of roadbed soil modulus of resilience, CBR (Constants Bit Rate) intensity, and the like in a seasonal frost region under a least favorable state, which cannot be achieved by the traditional devices, and can directly provide necessary design parameters for engineering design.
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Description

technical field

[0001] The invention relates to a technical field for road subgrade soil tests in seasonally frozen regions, and more specifically relates to a multifunctional highway soil foundation freeze-thaw cycle test device, which is suitable for complex temperature and moisture boundary conditions of subgrade soil tests in seasonally frozen regions And parallel test requirements, so as to realize the determination of engineering design parameters such as modulus of resilience and CBR strength of subgrade soil in seasonally frozen areas under the most unfavorable conditions. Background technique

[0002] The distribution area of ​​seasonal permafrost in my country is very extensive, covering areas with latitude higher than 24°, and its distribution area is 5.137×10 6 km 2 , accounting for 53.5% of the country's land area. The subgrades or foundations of linear structures such as roads and railways in seasonally frozen areas are subject to the alternation of winter an...

Claims

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