高原机场修建中冻土区域浇筑控制与热损失的关系  

Relationship Between the Control of Frozen Soil Area and the Heat Loss in the Construction of Plateau Airport

作　　者：张纯林[1] 

机构地区：[1]中国民用航空飞行学院,四川广汉618307

出　　处：《科技通报》2017年第6期143-146,共4页Bulletin of Science and Technology

基　　金：国家自然科学基金项目(项目编号:60832012)

摘　　要：针对在高原机场修建中冻土区域浇筑控制时,一直存在大量热损失的问题,提出基于非线性弹性理论模型的冻土区域浇筑控制与热损失关系分析法,该方法先对冻土区域的应变进行分析,确定冻土区体变增量情况,并以此为基础,确定高原冻土区域土体发生塑性应变增量与应力增量的关系,采用热物理参数计算出冻土区域土体温度场数值,得到冻融土的体积热容量,分析冻土区域进行浇筑控制时产生的冻融情况,确定导热微分方向,建立浇筑控制与热损失间的非线性弹性理论模型,分析高原机场修建中冻土区域浇筑控制与热损失的关系。实验结果表明,沿着浇筑中点的温度会随着浇筑控制时间的增长而降低,距离浇筑中心越远位置的土体,温度越低,热损失越快。Aiming at the control of pouring construction in permafrost regions of the Plateau Airport, there has been a lot of heat loss problems, put forward analysis method of nonlinear elasticity theory model of permafrost region pouring control and heat loss based on the relationship analysis of the method of permafrost regions determine the permafrost body strain, incremental change, and on this basis, the determination of plastic strain increment and stress increment occurred in permafrost regions of the soil,and calculate the area of the soil temperature field of frozen soil by thermal physical parameters, freeze thawed soil volumetric heat capacity, analysis of permafrost freezing thawing conditions produced by pouring domain control, determine the thermal differential direction, establishes the theoretical model of nonlinear elastic casting control and heat loss, analysis of the relationship between the construction of the airport in the plateau permafrost region pouring control and heat loss. The experimental results show that the temperature along the pour point will decrease with the increase of casting control time. The farther away from the pouring center, the lower the soil temperature and the faster the heat loss.

关 键 词：高原机场修建 冻土区域 浇筑控制 热损失 关系 

分 类 号：TU445[建筑科学—岩土工程]