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青藏铁路成败的关键在路基工程,而路基工程的关键是冻土问题。为研究填土分选重组试验路堤的承载力状况以及冻土沉降钻孔监测设备的性能和监测结果的可靠性,进行了基于平板载荷试验的冻土沉降监测设备可靠性验证,估算试验路堤的承载力。试验结果表明,将试验路堤土体视为各向同性弹性连续介质模型是合理的;冻土变形监测设备测试结果与利用土介质的各向同性弹性连续介质模型的计算结果相吻合,显示出冻土钻孔变形监测设备具有较高的可靠性。
The key to the success or failure of the Qinghai-Tibet Railway is subgrade construction, while the key issue of subgrade construction is the issue of permafrost. In order to study the bearing capacity of embankment, the performance of permafrost settlement boring monitoring equipment and the reliability of monitoring results, the reliability verification of permafrost monitoring equipment based on slab load test was carried out to evaluate the reliability of test embankment Carrying capacity. The test results show that it is reasonable to consider the test embankment as an isotropic elastic continuous medium model. The test results of the frozen soil deformation monitoring equipment are in good agreement with the calculated results of isotropic elastic continuous medium model using soil medium, Soil drilling deformation monitoring equipment with high reliability.