青藏铁路高原多年冻土区片石通风路基

The Ventilative Sheet-Stone Roadbed of the Qinghai-Tibet Railway in Plateau Permafrost Regions

抛填片(块)石通风路堤具有保护多年冻土的作用,根据高原多年冻土区路基常见病害及青藏铁路试验路基设计原则,初步探讨并预测该路基结构的适应性,并在清水河试验路基段进行了实践应用,给出了保护效果的定量描述。

According to the design principles of the test roadbed of the Qinghai-Tibet Railway and the well-known troubles of the roadbed in the plateau permafrost regions, the applicability of roadbed is primarily discussed and predicted in this paper. Concretely, a roadbed mainly consists of soil, with a ventilative sheet-stone layer and a waterproof layer. In fact, its working principles have the advantage like a heat on-off. Moreover, the ventilative sheet-stone roadbed has its structure advantage in theory. In addition, the tests in situ have confirmed the advantages. Therefore, the ventilative sheet-stone roadbed filled artificially is an active effective measure protecting the frozen ground, and it will be applied abroad to the construct of the Qinghai-Tibet Railway.