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我公司于1987年承接了312国道K60～90共30km水泥混凝土路面工程,是按高速公路设计、一级公路标准施工的高等级公路.路基宽26m,标高允许误差±2cm,压实度95%以上.该路段地处平原微丘地区,垅岗较少,年降雨量在1200mm左右,地下水位在0.7～2.1m之间,年有效工作天数约为180天.地质为弱膨胀性粘土或亚粘土,含铁锰成份较多,土干时僵硬,推土机刀片切入困难,土粒难于粉碎,雨水浸泡后呈泥状,影响施工.
My company in 1987 to undertake the 312 State Road K60 ~ 90 a total of 30km of cement concrete pavement, according to the highway design, a highway construction of high-grade highways. Subgrade wide 26m, elevation tolerance ± 2cm, compaction 95% . The section is located in the plain micro-mound area, less hillock, the annual rainfall of about 1200mm, groundwater level between 0.7 ~ 2.1m, the effective working days is about 180. Geology of weakly expansive clay or Asia Clay, iron and manganese more ingredients, dry soil stiffness, bulldozers blade into difficult, difficult to crush the soil particles, the mud was soaked in rainwater, affecting the construction.