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京石公路永定河上大宁水库(原名小清河)大桥。西桥台至五号墩的上部构造为五孔一联,后张预应力箱型连续梁弯桥,曲线半径为400米,每孔35.5米,桥宽25.5米,双箱分离式,单箱宽12.75米(梁底宽6.75米),梁高1.8米,纵坡1‰,横坡1.5％,设超高不加宽,桥中心设0.55米宽隔离墩,外侧各设0.75米宽安全带,桥面可行驶二上二下机动车和临时停车线。(见图一)。本桥设计荷载汽超—20,挂—120特—
Beijing-Shijiazhuang Yongding River Daning Reservoir (formerly Xiaoqing River Bridge). The upper section of West Bridge Station to Pier No.5 is composed of a five-hole-one and a post-tensioned prestressed box-type continuous beam bridge with radius of 400 meters, 35.5 meters per hole, 25.5 meters of bridge width, double box separation, single box 12.75 meters wide (6.75 meters at the bottom of the beam), 1.8 meters high beam, longitudinal slope 1 ‰, 1.5% cross slope, set high without widening, the center of the bridge set 0.55 m wide isolation pier, the outer side of the 0.75 m wide seat belts , The bridge can drive two on two motor vehicles and temporary parking line. (See figure I). The bridge design load steam super -20, hanging -120 special -