温控动三轴试验装置的研制及应用

doi:10.13722/j.cnki.jrme.2014.1370

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Abstract To investigate the effect of temperature on the dynamic characteristics of soil，a temperature-controlled cyclic triaxial test system was developed by using combined heating apparatus. The system can precisely realize linear，hierarchical control of sample temperature in the range of 10～100℃. Then，the saturated silt soft clay in Ningbo area is taken for example，and a series of application tests for dynamic characteristics under different temperatures are preliminarily carried out，which validate the effectiveness and reliability of the system. Test results showed that characteristics and development of hysteretic curves under different temperature is consistent with that of general triaxial test system. With the increase of temperature，plastic cumulative strain，dynamic damping ratio and dynamic pore pressure of the soft clay decreased and inversely for dynamic elastic modulus，and the incremental values for above parameters were gradually reduced with the increasing of temperature，from which the hot hardened features is revealed. Furthermore，normalized result of cumulative plastic strain and temperature is exponential.

Key words： Temperature control system Dynamic characteristics Dynamic damping ratio Dynamic elastic modulus

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1370 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/I7/6

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