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唐港高速公路沿线地下水位较高 ,大多数路段为粉质低液限砂土及粉砂 ,只有少量路段为粘性土。针对不同的土质 ,采用不同的加固方案 ,以便使基层或底基层具有良好的力学性能。然而在温差较大的唐山地区 ,各类稳定土材料的温缩性能直接影响到建成后公路的使用性能。因此 ,本研究分析测定了水泥加固类及生石灰、粉煤灰加固类半刚性材料的温缩系数 ,并研究探讨了各类材料的温缩特点及影响因素。
The groundwater level along the Tanggang Expressway is relatively high. Most sections are silty low-liquid-limited sand and silt, with only a small number of sections being clayey soils. For different soil, using different reinforcement programs in order to make the grassroots or sub-base has good mechanical properties. However, in the Tangshan area where the temperature difference is relatively large, the temperature-shrinking properties of various stabilized soil materials directly affect the service performance of the highway after its completion. Therefore, this study analyzed and measured the thermal shrinkage coefficients of cement-reinforced and quicklime, fly ash-reinforced semi-rigid materials, and discussed the characteristics of temperature shrinkage and the influencing factors of various materials.