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Augered Cast-in-Place Pile Foundation Design and Construction for the MLK Bridge, New Stadium Project, Atlanta

机译:亚特兰大新体育馆项目MLK桥的螺旋地埋桩基础设计与施工

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Augered cast-in-place (ACIP) piles were installed for an elevated roadway in the City of Atlanta, as part of the infrastructure improvements for a new stadium project. The design-build project team opted to support the continuous span bridge on groups of 610 mm diameter ACIP piles, principally to avoid noise and vibration issues in the downtown environment. The ground conditions comprised a sequence of fill, Piedmont residual soil and partially weathered rock (PWR), overlying precambrian metamorphic rocks. Results of two instrumented static load tests on non-production piles demonstrate the axial loads are transferred principally in shaft resistance. Mobilized unit side resistance values of 73 kN/m2 in the Piedmont residual soil and 199 kN/m2 in the PWR were derived from strain gauge arrays. For production piling, confirmation of the embedment lengths and grout volumes were key quality control parameters, verified during construction with automated monitoring equipment (AME).
机译:作为新体育场项目基础设施改进的一部分,在亚特兰大市的一条高架道路上安装了螺旋灌注桩(ACIP)。设计建造项目团队选择为直径610毫米ACIP桩组上的连续跨度桥梁提供支撑,主要是为了避免市区环境中的噪声和振动问题。地面条件包括一系列的填充,皮埃蒙特残余土壤和部分风化岩石(PWR),覆盖在前寒武纪变质岩上。在非生产性桩上进行的两次仪器化静载荷测试结果表明,轴向载荷主要以轴阻力传递。从应变仪阵列得出在皮埃蒙特残余土壤中动员的单位侧电阻值为73 kN / m2,在压水堆中动员的单位侧电阻值为199 kN / m2。对于生产打桩,包埋长度和灌浆量的确认是关键的质量控制参数,在施工过程中使用自动监控设备(AME)进行了验证。

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