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一、工程及地质概况 新建的莲花泡灌排站在黑龙江省肇源县松干堤防82+115 m处,灌溉期引松花江水灌溉稻田3万亩,内涝时排内水入松花江。站址东侧为已废泵站及灌溉渠道、西侧为现仍使用的泵站,松花江分支及排水渠道,中间作业最窄处30 m,最宽处不足42 m,开挖深度最深达12 m,地下水位以下6.5 m,建筑物总长91.75 m,宽5.8 m。 莲花泡灌排站地层岩性为二元结构,自上而下分为:低液限黏土。其土质暗黄色、湿、可塑,厚2 m分布于地表层;含细粒土细砂。灰色、湿、可塑、厚2.5 m,分布于暗黄色低液限黏土层之下;细砂。灰色、饱和、中密、上部有少量黏土夹层,揭露厚度6.5 m。埋于含细砂黏土细砂下部。地下水位埋深6 m。
I. Overview of Engineering and Geology Newly built lotus-soaked irrigation and drainage station stands at 82 + 115 m of Songgan embankment in Zhaoyuan County, Heilongjiang Province. During the irrigation period, 30000 mu of paddy field is irrigated with irrigated water from Songhua River. The east side of the site is a waste pump station and an irrigation channel. The west side is the pumping station still in use, the Songhua River branch and the drainage channel. The narrowest intermediate work is 30 m and the widest point is less than 42 m. The deepest excavation depth 12 m, 6.5 m below groundwater level, 91.75 m in total length and 5.8 m in width. The stratum lithology of lotus bubble irrigation and drainage station is binary structure and is divided into top-down: low liquid limit clay. The dark yellow soil, wet, plastic, 2 m thick distributed in the surface layer; fine sand with fine grained soil. Gray, wet, plastic, thickness 2.5 m, distributed in dark yellow low liquid limit clay layer; fine sand. Gray, saturated, medium density with a small amount of clay interlayer on top exposing a thickness of 6.5 m. Buried in fine sand with fine sand clay. Groundwater depth of 6 m.