中线南水北调荥阳段工程地质条件与问题分析

Analysis on geological conditions and problems of Xingyang section of midline South-to-North Water Transfer Project

通过对中线南水北调荥阳段工程地质勘探,查明该区域的地层主要为第四系冲积及风积黄土状壤土和粉质粘土组成,地层分布稳定,厚度大于30 m,总体来看,场区工程地质条件较好,但第四系上部黄土状土具有湿陷性,强度略低,渠坡多位于该湿陷土层,设计时应予以考虑,该区内地下水对混凝土无侵蚀性,地表水因人工污染,有硫酸盐型弱腐蚀性,建议选用抗硫酸盐水泥。

Through the geological exploration to Xingyang section of midline South-to-North Water Transfer Project, identified the stratum of this region was mainly composited by quaternary alluvial and aeolian loess loam and silt clay, the stratum distribution stability, thickness was more than 30 m, from overall, the site engineering geological condition better, but the quaternary upper loess soil had collapsibility, strength slightly lower. The canal slope located in collapsible soil, should make consideration in design. The groundwater of this region had no erosion to con- crete, the surface water by artificial pollution, had sulfate type weak corrosive, and suggested using sulfate resistant cement.