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1 地形、地质简况及地球物理特征北汝河涵洞式渡槽是南水北调中线工程与北汝河的交叉建筑物,位于河南省郏县北汝河上,河床较为平坦。覆盖层主要为粉土、粉砂质壤土、砂卵石;阶地上主要为粉质粘土、泥卵石。基岩主要为上第三系砂砾岩、粘土岩、细砂岩。地表粘土埋深一般在1.0～7.5m之间。泥卵石在3.0～10.0m之间。由孔旁震探资料和电探资料反推的地层波速和电阻率见
1 TOPOGRAPHICAL, GEOLOGICAL AND GEOPHYSICAL CHARACTERISTICS The North Ru River culvert aqueduct is a cross between the Middle Route of the South-to-North Water Diversion Project and the North Ru River, and is located on the north Ru River in Juxian County, Henan Province. The riverbed is relatively flat. The main cover is silt, silty loam, sandy pebbles; terraces mainly silty clay, pebbles. Bedrock is mainly Upper Tertiary glutenite, clay rock, fine sandstone. Surface clay depth generally between 1.0 ~ 7.5m. Mud pebbles in the 3.0 ~ 10.0m between. See the seismic velocity and resistivity of the formation from the side-by-side seismic prospecting data and the electrical prospecting data