多年冻土区地温测试关键技术研究

Study on the Technology for Ground Temperature Test in Permafrost Region

研究目的:地温测试是多年冻土地区工程地质勘察的关键,其结果是多年冻土区各类工程设计的依据,其结果的准确性直接影响着工程处理措施的合理性。青藏铁路多年冻土地区开展了大量的地温测试工作,本文研究目的就是通过对青藏铁路地温测试工作的总结来进行地温测试关键技术的研究,以供青藏高原及其它多年冻土地区地温勘察借鉴。研究结论:通过对青藏铁路多年冻土区地温测试工作的总结和研究,形成了一套经施工验证且适合于多年冻土地区勘察的地温测试关键技术,关键性技术包括:地温钻孔的钻探方法、测温管的安装及防渗水处理、钻孔地温恢复时间、地温测试元件的安装、数据采集和处理。熟悉掌握地温测试的各个环节是获取准确地温数据的关键。

Research purposes： The ground temperature test is a key point of engineering geologic investigation in permafrost region,and the accuracy of the tested result is essential to the rationality of the measures for the construction in permafrost region because the tested result will be as the basis to the engineering design.As there were already lots of the works done on ground temperature tests for construction of Qinghai-Tibet Railway,this paper studies and sums up the technology for the ground temperature tests for Qinghai-Tibet Railway for the purpose of providing the reference to the similar works in permafrost region.Research conclusions：Based on studying the technology for the ground temperature tests for Qinghai-Tibet Railway,a complete set of investigation technology is summed up,including the drilling method for ground temperature,fixing test tube and its waterproof,recovery time of ground temperature in drilling,fixing components for ground temperature test,and collection and analysis of data.