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Frost heaving meter

A technology of frost heave and glass, which is applied in the field of frost heave instrument, can solve the problems of not being able to adapt to the rapid development of railways, poor applicability, and inconvenient use, and achieve the effects of high temperature control range, wide applicability, and high measurement accuracy

Active Publication Date: 2015-05-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing equipment for measuring subgrade frost heave has shortcomings such as few functions, low accuracy, limited applicability, and inconvenient use, which can no longer meet the needs of the rapid development of railways

Method used

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Examples

Experimental program
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Embodiment Construction

[0030] like figure 1 — image 3 As shown, the frost heave instrument includes a support part, a temperature control part, a geotechnical test part and a data acquisition part; Column 14, the connection plate 11 fixed on the top of the guide column 14 by nuts 9, the limit screw 10 and the hook 12 arranged on the connection plate 11; the geotechnical test part includes a soil sample device and a weight loading device, and the soil The sample device comprises a lower temperature plate 23, an upper temperature plate 15, a glass sample cylinder 20, a heat preservation cover 4 and a water supply device 27. The lower temperature plate 23 is fixed on the base plate 22 through the supporting feet 24, and a ring is arranged in the middle of the lower temperature plate 23. Groove 2301, the glass sample tube 20 is located in the groove 2301 of the lower temperature plate 23 and is located between the lower temperature plate 23 and the upper temperature plate 15, and the glass sample cyli...

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Abstract

The invention discloses a frost heaving meter. The frost heaving meter comprises a supporting part, a temperature control part, a geotechnical testing part and a data acquisition part, wherein the supporting part comprises a bottom plate, two guide columns fixed on the bottom plate, a connection plate arranged at the upper parts of the guide columns, and limiting parts arranged on the connection parts; the geotechnical testing part comprises a soil sample device and a weight loading device; the temperature control part comprises a temperature control system which is connected with an upper temperature disc and a lower temperature disc respectively; the data acquisition part comprises a temperature probe and a moisture content probe which are arranged on a glass test sample barrel, a pressure sensor arranged between the upper temperature disc and a movable plate, and a displacement sensor arranged between the weight loading device and the supporting part. The frost heaving meter has the advantages of multiple functions, high precision, wide applicability, convenience in utilization and the like.

Description

technical field [0001] The invention belongs to roadbed measuring equipment. Specifically relates to a frost heaving instrument. Background technique [0002] Frost heave is caused by the freezing of water in the soil and the growth of ice (especially the convex mirror-shaped ice body), which causes the expansion of the soil and the uneven uplift of the ground surface. Due to the large amount of seasonal frozen soil covered in northern my country, with the rapid development and expansion of engineering construction, frost heaving of railway and road subgrades has become an engineering problem that cannot be ignored and needs to be solved urgently. The phenomenon of frost heave seriously damages the quality of the project and even endangers the structure Safety, the essence of studying frost heaving is to study the water migration and freezing process in the soil. Studies have shown that when the outside temperature is low enough in winter, a certain frequency (10-30HZ) of d...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 张升梁思皓贺佐跃滕继东刘岩
Owner CENT SOUTH UNIV
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