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望亭立交是望虞河穿越京杭运河的一个枢纽工程,具有泄洪、蓄水、引水、通航等多种功能。按照太湖流域总体规划确定的控制运用条件,遇1954年型洪水,可通过立交向长江泄洪23×10~8m~3。这项工程使望虞河从京杭运河下面穿过,上部运河为60m宽的矩形航槽,超过四级航道标准;下部望虞河为九孔6.5×7.0m的箱形涵管,净过水面积400m~2,两河呈60°斜交。工程计需开挖(回填)土方70×10~4m~3、浇注钢筋混凝土6×
Pavilion pavilion is Wang Yu Wang across the Beijing-Hangzhou Grand Canal a hub project, with flood discharge, storage, diversion, navigation and other functions. According to the control and application conditions determined by the overall plan of the Taihu Lake Basin, in case of 1954 floods, 23 × 10 ~ 8m ~ 3 flood discharge to the Yangtze River can be made. The project allows the Wang Yu River from the Beijing-Hangzhou Grand Canal through the upper canal is 60m wide rectangular channel, more than Class 4 channel standards; the lower part of the Wangyu as nine holes 6.5 × 7.0m box culvert, the net water area 400m ~ 2, the two rivers were inclined 60 °. Engineering need excavation (backfill) earthwork 70 × 10 ~ 4m ~ 3, pouring reinforced concrete 6 ×