论文部分内容阅读
多年冻土地区铁路桥梁工程往往由于地基的冻融作用,不良冻土地区现象的影响,会产生各种工程病害,从而影响工程使用。在此考虑了大气温度、水文地质条件,混凝土入模温度、冻土初始地温场的影响及相变效应,以传热学为基础,给出了冻土区单桩地温场控制微分方程、边界和初始条件,以及其空间分析的有限元计算模式,详细总结了多年冻土区桥梁桩基施工工艺及方法、保证工程质量的技术措施、施工中遇到的问题及解决方法。
In the permafrost regions, the railway bridges and bridges often have various engineering diseases due to the freezing and thawing of the foundation and the influence of the phenomena of the poor permafrost, thus affecting the project’s use. Considering the effects of atmospheric temperature, hydrogeological conditions, the temperature of concrete, the initial geothermal field of frozen soil and the phase transition effect, the governing equations governing the temperature field of single pile in permafrost region are given on the basis of heat transfer. And initial conditions, as well as the finite element calculation model of its spatial analysis. The construction technology and method of bridge pile foundation in permafrost region, technical measures to ensure project quality, problems encountered in construction and solutions are summarized in detail.