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详细介绍青藏铁路厚层地下冰地段路堤填筑及路堤防护、排水、过渡段综合施工技术,通过采用通风管和片石两种方式成功地解决路堤堤身热量的散失问题,从而提高基底的冷却量,维护基底多年冻土的稳定。另外,通过碎石及抛片石护坡、U形水沟以及挡水埝等路堤防护及排水工程的施工,有效地解决路堤的热融问题,减少路堤下多年冻土上限的变化幅度,改变路堤下多年冻土人为上限的状态,提高路堤的稳定性。
This paper introduces in detail the embankment filling and the comprehensive construction technology of embankment protection, drainage and transitional section in the deep underground ice section of Qinghai-Tibet Railway. Through the adoption of the ventilation pipe and the tablet-stone, the heat dissipation of the embankment dike is successfully solved and the cooling capacity of the basement is improved , To maintain the stability of permafrost basement. In addition, through the construction of embankment protection and drainage works such as rubble and cast-in-stone protection, U-shaped ditches and water retaining brackets, the heat and melt problems of embankments are effectively solved, the variation range of permafrost ceiling under embankments is reduced, Permafrost man-made ceiling, improve the stability of the embankment.