多年冻土区短桩架空通风基础房屋的模型试验研究

Modeling Test on the Building with Short Piles and Ventilating Foundation in Permafrost Regions

本文介绍了工程建筑物基础和多年冻土地基整体的相似模型试验。试验结果与实体取得良好的一致。从动态过程肯定了持力层为含土冰层时，冻土允许承载力Ｒｆ的可靠性。同时，明确了可依据冻土层年平均地温Ｔ（ｃｐ）＝－２．５℃时，持力层（平均）地温Ｔ＝－０．５℃，允许承载力Ｒｆ＝０．１ＭＰａ，只能建一层平房。当Ｔ（ｃｐ）＝－４．０℃时，Ｔ＝－１０──１．２℃，Ｒｆ＝０．１５－０．１７ＭＰａ，可有条件地建二层楼房。

The paper presents an integral similar modeling test of a building with permafrost base.The tested results are in good agreement with the real. By simulating the dynamic process of a building in laboratory, we give a further evidence that the allowable bearing capacity of frozen soil R_f is reliable, when the confined layer is the ice layer with soil, in the same time,we can assure that, when the mean annual ground temperature of frozen soil T_(cp)=-2.5℃, the mean ground temperature of the confined layer can be taken as T=-0.5℃, and the allowable bearing capacity R_f=0. 1MPa, thus only single-storey house can be built, when T_(cp)=-4.0℃,T=-1.0--1.2℃, R_f=0.15-0. 17MPa, under certain conditions, two storey house can be built.