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4月25日,望虞河一期工程沙墩口土方工程以优良等级通过省级验收,这是我省苏南地区大型河道土方工程首次机械化施工的成功尝试.望虞河沙墩口段是太湖洪水入江口门,原有河道断面狭窄,去年特大洪涝期间曾炸坝泄洪.一期工程工长1.6km,河底宽40m,底高-1m(吴淞基面),土方35.4×10~4m~3,工程实施后可满足汛期泄洪150m~3/s的要求.该工程基本上沿老河道开挖,河床表面及两岸坑塘淤土厚度一般为0.5～1.5m,呈流态并夹砖杂.土层高程+3～0m间有粘土质高塑态夹层淤土,厚度1～3.5m左右,含水量超过40%.施工期间,冬季遇雨雪冰冻等恶劣气候,3月中旬起又遭连续降雨,在140天的施工期间先后两次
On April 25, the first phase of the Wangyu River project sand pier mouth earthwork to pass the provincial level acceptance, which is the southern Jiangsu province large river earthworks for the first time mechanized construction of the successful attempt. The Taihu Lake flood entry gate, the original river channel section is narrow, last flood flood during the dam was spilled flood.The first phase of the project chief 1.6km, river bottom width 40m, at the end of -1m (Wusong surface), earthwork 35.4 × 10 ~ 4m ~ 3, the project can meet the requirements of flood discharge flood 150m ~ 3 / s after the project implementation.The project is basically along the old river excavation, river bed surface and cross-bank silt thickness is generally 0.5 ~ 1.5m, was fluid and brick Miscellaneous soil layer elevation of +3 ~ 0m clayey silt with high plasticity between the thickness of 1 ~ 3.5m, the water content of more than 40% during the construction of the winter when the snow and ice freezing and other bad weather, since mid March again It was rained continuously and twice during the 140 days of construction