【摘要】 青藏铁路将要穿越的多年冻土大多属于高温冻土,其中近一半为高含冰量冻土。由于实验条件限制,人们对高温高含冰量冻土认识非常有限。对于青藏铁路沉降变形的预测却在一定程度上依赖于这部分力学参数确定。因此,研制适合高温冻土蠕变实验研究设备非常必要。该仪器利用现有冰箱制冷技术,外加一套控温技术和数据采集系统的技术。此设备设计新颖、控温精度高、加力系统稳定、节约能源、环保、移动方便等特点。很有实用价值,设备制冷控温部分和数据采集部分还可单独分开使用。更多还原

【Abstract】 Most permafrost along the Qinghai-Tibet railway belongs to the warm permafrost category,and near1y half of which is ice rich permafrost.People know little about warmer permafrost with higher ice content,because of the limit of test instrument.However,the prediction of the settlement of the Qinghai-Tibet railway depends on the determination of these mechanics parameters to a certain extent.So it is necessary to develop an instrument that fits to research warmer permafrost with higher ice content.According to the embankment settlement research in warmer permafrost regions along the Qinghai-Tibetan Railway,we designed a creep instrument with an automatic temperature control system.It is composed of a refrigerator,a temperature control system and a datataker.The equipment is novel,precise,stable and convenient to move.It has practical value and can meet the requirement of the experiment entirely.The data collection system can also be used in other test.更多还原