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大红门桥原有8孔木桥,全长32米,1971年改建为预应力钢筋混凝土桥,桥宽17米,全长45米,分3孔,每孔15米。桥台采用浅置式,以块石砌成。桥墩根据当地地质情况(河底以下1.7米为细砂,1.7～7.0米为砂砾,7.0米以下为砂粘)采用分段预制混凝土空心墩柱,以空气吸泥机吸泥,自重下沉,沉到设计标高后,用水下混凝土封底,中
The original 8-hole wooden bridge of Dahongmen Bridge has a total length of 32 meters. It was converted into a prestressed reinforced concrete bridge in 1971. The bridge has a width of 17 meters and a total length of 45 meters. It is divided into 3 holes and each hole is 15 meters. The abutment is made of shallow stone and made of block stone. According to the local geological conditions (the 1.7 m below the river is fine sand, 1.7-7.0 m is grit, and the following 7.0 m is sand-stick), the precast concrete hollow piers are used to suck mud by the air suction machine and sink by gravity. After sinking to the design elevation, cover the concrete with water underneath,