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随着施工技术的不断提高,桩径和桩长都在加大,六十年代以后逐渐成为桥梁的主要基础形式。钻孔灌注桩以其承载力高、工艺成熟、质量可靠而得到广泛肯定,济齐黄河公路大桥为济南侧引桥为左右幅10联支架现浇连续梁,箱梁采用单箱双室斜腹板截面。桩位于黄河大坝淤背区,属于大直径长桩,地下水位高,粉砂层较多,容易塌孔。本文介绍了大直径特长灌注桩桩基的施工经验,可供同类工程借鉴。
With the continuous improvement of construction technology, pile diameter and pile length are increasing. After the 1960s, it gradually became the main foundation of the bridge. Bored pile with its high carrying capacity, mature technology, reliable quality and has been widely affirmed, Jiqi Yellow River Bridge for the Jinan side of the bridge for the left and right frame 10-frame cast-in-situ continuous beams, box girder single-chamber dual-chamber oblique web section. Pile located in the Yellow River dam silt area, is a large diameter long pile, groundwater level is high, silt layer more easily collapsible hole. This paper introduces the construction experience of large diameter cast-in-place pile foundations, which can be borrowed for similar projects.