特殊土（）.docVIP

特殊土（） Engineering properties of special soil: collapsible loess Expansive soil Frozen soil Red clay ? - - - - - - - - special soil? Collapsible loess (Hydrocollapsible Loess) cause exergy between soil particles were CaCO3, CaSO3 and other soluble salts in forming cement with macroporous structure and porous rate under certain pressure consolidation under water seeping through the rapid destruction of soil structure and produce Loess with remarkable additional deformation The natural state characteristics of exergy high strength low compression rate In case of failure rate of rapid sedimentation water soil structure The deformation rate of strength decreased rapidly 3? Collapsibility - Determination of collapsibility of loess foundation in collapsible loess In the collapsible Foundation pressure Shrinkage deformation Vertical pressure HPHP 0 () /s, P, pH, h, H The rate in the 0.015 0.03 0.07 wrong Slight medium Strong n Si I Is h in the hydrocompaction in exergy rate is collapsible loess Initial collapsibility pressure Is the pressure of collapsibility greater than that occurring? 4 weight pressure? Hazards need to distinguish the Loess Collapsibility Loess Foundation collapsibility in prediction after immersion may cause The amount of water used during construction and use and the possibility and amount of water to be immersed in the ground The rain may seep into the ground in the depth of groundwater rise and rise of possibility degree of building deformation sensitivity and allowable deformation to prevent water from seeping into the ground Foundation treatment measures Construction measures Reduce predisposing factors Change ones nature Improving the adaptability of superstructure answer Yes primary be base The measures of expansive soil? (Expansive Soils) 5 expansive soil is a kind of non saturated rate unstable structure High plasticity cohesive soil. The water swelling shrinkage rate characteristics of exergy exergy harm resulting in uneven expansion and contr