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小洪河近期治理工程第4期第4标段五沟营东街桥梁工程位于小洪河西平段,按汽-20设计,挂-100验算。桥面行车道宽净-7+2×0．5m,桥下部结构采用双柱墩式钻孔灌注混凝土摩擦桩,直径1．2m。桥址区钻孔深度为30m,每个桥勘探孔数4～5个。依据地层岩性特征,将桥址区地层分为4层,分别为:第1层,轻质壤土一般厚0．4～5m;第2层,中粉质壤土,厚7．0～10．0m;第3层,轻质壤土类粉细砂透镜体,厚8．0m;第4层,重粉质壤土,厚7．0m。根据地质资料及设计要求,采用循环钻机成孔。
Xiao Honghe fourth phase of the recent management of the fourth tenders WuGouYing east street bridge project is located in xiaoping Xiaoxiao River, according to steam -20 design, hanging -100 checking calculation. Deck wide net -7 +2 × 0.5m, the bridge under the structure of double-column pier bored concrete friction pile, the diameter of 1.2m. Bridge site drilling depth of 30m, each bridge exploration holes 4 to 5. According to the stratigraphic lithology, the strata in the bridge site area are divided into four layers, which are respectively the first layer and the light-weight loam, and the second layer is medium-silty loam with the thickness of 7.0-10. 0m; Layer 3, lightweight loamy silt lens, thickness 8.0m; Layer 4, heavy silty loam, thickness 7.0m. According to the geological data and design requirements, using a circulating drilling machine into the hole.