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塘楼运河大桥位于浙江余抗县塘楼境内,横跨京杭大运河。河面宽为100米左右,河床系冲积层软土地基、属白垩纪地质年代。深度100米以下是灰火成岩、50米以下为黄褐色含砾粘土,30米以下是各类粉砂夹粘土层,其上均为青灰色亚砂土。土壤空隙比0.9、含水量32.3％,地基承载力0.8—1.0公斤/平方厘米,河床经压缩采用净跨70米的拱桥跨越。由于施工设备的限制主拱圈改为双曲拱。为适应软基、尽可能满足垂直承压力及水平推力需要,基础采用箱形沉井,后座以设18.2米阻滑板拱上建筑及沉井、后阻滑板上分别以十孔
Tong Tang Canal Bridge is located in Yu Kang County, Zhejiang Tong territory, across the Beijing-Hangzhou Grand Canal. River is about 100 meters wide, alluvial riverbed soft soil foundation, is a Cretaceous geological era. The depth of 100 meters below the gray rock pyrite, 50 meters below the yellow brown pebble clay, 30 meters below are all kinds of silt clayey clay layer, which are on the gray-blue sand soil. Soil void ratio of 0.9, water content of 32.3%, foundation bearing capacity of 0.8-1.0 kg / cm, the riverbed compressed by a span of 70 meters across the arch bridge. Due to the restriction of construction equipment, the main arch was changed to double arch. In order to meet the soft foundation, as far as possible to meet the vertical bearing pressure and horizontal thrust needs, based on the use of box-shaped sinkhole, the back seat to set 18.2 meters skid plate arch construction and caisson, the back of the skateboard were ten holes