To reduce frost heave and thaw settlement deformations in channel soils and minimize cracking in chan-nel lining concrete,this study uses a custom experimental setup to investigate the temperature and deformation pat-terns of Ningxia clay and cement-stabilized soil during freeze-thaw cycles,and measures deformation curves across multiple freeze-thaw cycles.The results show that clay undergoes six stages of freeze-thaw deformation:rapid heave,cooling shrinkage,stable heave,warming expansion,slow thaw settlement,and stable settlement,confirming a temperature plateau during ice melting.With multiple freeze-thaw cycles,the cumulative heave of clay increases linearly with the number of cycles.In contrast,cement-stabilized soil exhibits frost shrinkage and thaw expansion with minimal deformation,and cumulative deformation is nearly zero after several cycles.Therefore,replacing part of the clay with cement-stabilized soil can effectively reduce freeze-thaw deformation in channels and benefit the structural crack resistance of concrete linings.
关键词
水泥固化土/冻胀融沉/渠道衬砌/黏土冻融变形
Key words
cement-stabilized soil/frost heave and thaw settlement/channel lining/clay freeze-thaw deformation
维普
万方数据