青藏铁路低架空房屋基础冻土地温及基础沉降监测及分析

针对青藏铁路高寒多年冻土的特性,为了确保多年冻土不被人为破坏及结构自身安全,青藏铁路不冻泉站区办公生产综合楼采用低架空基础。为了得到低架空房屋基础的安全性及其对多年冻土的影响,对基础冻土地温及基础沉降进行连续监测。监测数据表明:低架空房屋基础对于其下多年冻土起到有效的保护作用,房屋基础的变形控制点大部分表现为沉降,但沉降值较小,均满足现行规范要求。

Monitoring and Analysis of Frozen Earth Temperature and Foundation Subsidence of Low Suspended Building Foundation of Qinghai-Tibet Railway

According to the characteristics of permafrost of Qinghai- Tibet Railway,the low suspended building foundation is employed to prevent the ever-frozen ground from being interrupted manually for the security of its own structure. In order to justify the safety of the low suspended building foundation,the permafrost temperature and the foundation subsidence are monitored continuously. The monitoring data shows that the low suspended building foundation provides effective protection to the permafrost; the deformation of building foundation at most controlling points are settlement of small value,which meets the current specification requirements.