Multi-stage temperature-control unsaturated-soil creepmeter

Abstract

The invention belongs to the research field of geotechnical engineering tests and discloses a multi-stage temperature-control unsaturated-soil creepmeter. The multi-stage temperature-control unsaturated-soil creepmeter comprises pressure chambers (1), a suction control device (2), a temperature-controlled cabinet (3), pressure transferring devices (4), a loading device (5) and measurement devices (6). The pressure chambers (1) are fixedly arranged in the temperature-controlled cabinet (3). The suction control device (2) is arranged outside the temperature-controlled cabinet (3). The temperature-controlled cabinet (3) is arranged on a rigid platform located at a lower end of the loading device (5). The pressure transferring devices (4) are respectively arranged between the pressure chambers (1). The loading device (5) is arranged outside the temperature-controlled cabinet (3). The tops of the measurement devices (6) are fixedly arranged on axial dowel bars (19) and the bottoms of the measurement devices (6) are arranged on lower flat plates of the pressure chambers (1). The multi-stage temperature-control unsaturated-soil creepmeter can carry out four creep tests simultaneously and greatly reduce unsaturated-soil creep test time.

Description

technical field [0001] The invention relates to the field of geotechnical engineering test research, in particular to a geotechnical test instrument, in particular to a multi-stage temperature-controlled unsaturated creep instrument. Background technique [0002] The development of unsaturated soil mechanics has put forward higher and more precise requirements for traditional geotechnical testing instruments. Existing unsaturated geotechnical testing instruments are mainly made by modifying traditional geotechnical testing instruments, such as unsaturated consolidation instrument, unsaturated direct shear instrument and unsaturated triaxial instrument. Considering the loading characteristics of the creep test, the one-dimensional creep test of saturated soil is generally completed on the traditional consolidation instrument. Therefore, the creep test of unsaturated soil can also be completed by unsaturated consolidation instrument. According to Chen Zhenghan et al. (2004),...

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Problems solved by technology

[0003] In view of the defects in the prior art such as the limited vertical pressure and suction control range of the creep test, the inability to control the temperature and the long test period, the purpose of the present invention is to provide a multi-stage temperature-controlled unsaturated creep tester for temperature control. Experimental study on the one-dimensional creep characteristics of rock and soil materials under high suction and high creep pressure under controlled conditions

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