摘要
哈尔滨地区一年内温差巨大,该地区的冻融冻胀效应对深基坑支护结构的稳定性影响严重。对哈尔滨某深基坑进行监测与分析,结果表明:冻融冻胀对深基坑变形影响显著。土壤处于融化期时,沉降量增大。支护结构在最低温时平移最快。冻融冻胀对距离阴角越近的土体影响越小。基于Prandtl Reuss塑性理论的土体塑性变形模型可用来预估深基坑地表沉降速率与沉降量。研究成果可为类似工况的深基坑工程提供参考,对深基坑变形采取预防措施。
In one year,the temperature difference in Harbin area is huge,and the freeze-thaw frost heaving effect has a serious impact on the stability of deep foundation pit supporting structure.Based on the monitoring and analysis of a deep foundation pit in Harbin,the results show that the freeze-thaw frost heaving has significant influence on the deformation of deep foundation pit.When the soil is in the melting period,the settlement increases.The displacement of the supporting structure is the fastest at the lowest temperature.The influence of freeze-thaw frost heaving on the soil near the inner corner is smaller.The soil plastic deformation model based on Prandtl Reuss plastic theory can be used to predict the surface settlement rate and settlement of deep foundation pit.The research results can provide reference for similar deep foundation pit engineering and take preventive measures for deformation of deep foundation pit.
作者
纪光霞
Ji Guangxia(Shandong Yinan Municipal Engineering Company,Linyi 276000,China)
出处
《山西建筑》
2020年第20期92-95,共4页
Shanxi Architecture
关键词
冻融冻胀
深基坑
支护结构
地表沉降
水平位移
freeze thaw frost heave
deep foundation pit
supporting structure
surface subsidence
horizontal displacement
作者简介
纪光霞(1971-),女,助理工程师。
