温控非饱和土三轴试验装置的研制及其应用

高放核废物地质处置、地热资源开采与贮存以及城市地下供热管道设计等现代岩土工程的建设都需要考虑温度的影响，使得温度对天然非饱和土体基本性质影响的研究成为土力学的重要课题之一。为了研究非饱和土水力和力学性质受温度影响的规律，需要研制新的温控试验装置，以便为这种研究提供工具和手段。基于对既有非饱和土静三轴仪的改造，研制了一种温控非饱和土三轴试验装置，通过将所研制的温控压力室与非饱和土三轴试验系统的有机结合，实现了试验过程中对温度控制及量测的目的。利用该试验装置，对不同温度下非饱和土土水特征曲线进行了测定，所得结果与现有理论结果相吻合。

Development and application of a temperature-controlled triaxial test system for unsaturated soils

With the development of modern geotechnical engineering practices such as construction of high-level radioactive waste repositories, exploitation and utilization of geothermal resources, and design of the heat-supply pipelines in cities, the researches on the influence of temperature on the basic mechanical properties of natural unsaturated soils have become one of the most important issues in soil mechanics. A new temperature-controlled triaxial test system for unsaturated soils is proposed, which can be used to study the temperature effect on seepage and strength-deformation characteristics of unsaturated soils. With the combination of the existing static triaxial test system and a new temperature-controlled pressure chamber, the proposed test system can realize better control of temperature. Using the new temperature-controlled triaxial test systerm, the soil-water characteristic curves under different temperatures are tested, and the experimental data are consistent with the existing theoretical results.