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日本梦翔大桥由2跨PC连续箱梁桥和3跨PC连续矮塔斜拉桥组成,跨越熊野河的陡峭峡谷。矮塔斜拉桥采用高强度、自密实混凝土,使上部结构更加细长,地震响应程度有所减小。矮塔斜拉桥桥墩采用柱式墩身,沉箱式桩基础;桥塔为Y形倾斜结构,桥塔中预埋钢锚箱,塔端斜拉索锚固在其中;箱梁中设置12×Φ15.2体内预应力钢束和19×Φ15.2的体外预应力钢束,梁端斜拉索锚固在混凝土桥面翼板的加劲肋上;斜拉索采用27×Φ15.2的多股钢绞线束。大桥主梁采用挂篮对称悬臂浇筑,桥塔混凝土浇筑与斜拉索的安装和张拉同步进行,斜拉索采用主梁两端翼板下方4个千斤顶依次同时安装和张拉。
Japan Mengxiang Bridge consists of 2-span PC continuous box girder bridge and 3-span PC continuous low-rise cable-stayed bridge, spanning the steep canyon of Kumano River. Dwarf tower cable-stayed bridge using high-strength, self-compacting concrete, the superstructure more slender, the degree of seismic response has been reduced. The pylon of dwarf tower cable-stayed bridge adopts column pier body and caisson pile foundation; the tower is Y-shaped inclined structure, the steel anchor box is embedded in the bridge tower and the stay cable is anchored therein; the box beam is provided with 12 × Φ15 .2 in-body prestressing tendons and 19 × Φ15.2 external prestressing tendons, the beam-end stay cables being anchored to the stiffeners of the concrete deck flanges; the stay cables using 27 × Φ15.2 multi-strand steel Twisted bundles. Bridge girder symmetrical cantilever pouring, concrete pouring bridge and cable stay installation and tension simultaneously, the use of both ends of the girder under the girder at the bottom of the four jack at the same time install and tension.