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首页> 外文会议>Deep Foundations Institute 28th Annual Conference on Deep Foundations: Deep Foundations in Compressible Soil and Soft Rock >BRIGHTMAN STREET BRIDGE REPLACEMENT PROJECT
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BRIGHTMAN STREET BRIDGE REPLACEMENT PROJECT

机译：布莱曼街桥更换项目

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摘要

Construction of the drilled shafts for the Brightman Street Bridge Replacement Project were not only challenging due to working over the water but were also challenged by changed soil conditions, concurrent work being performed by an adjacent contractor on the same project, environmental restrictions and severe winter conditions. A total of 36 x 8 feet diameter drilled shafts with 7.5 feet rock sockets were installed for the East and West bascule piers. This project also included Osterberg Cell load testing on two production drilled shafts at each the East and West bascule piers. The results from the load test program were used to fine tune the design of the drilled shaft rock sockets. From a constructability standpoint the reverse circulation drilling method with a pile top drill rig proved to be an excellent choice for drilling the overburden and rock sockets of the large diameter deep drilled shafts.
机译：布莱曼街桥梁更换项目的钻井施工不仅因在水上作业而具有挑战性，而且还受到土壤条件变化，相邻承包商在同一项目上同时进行的工作，环境限制和严冬条件的挑战。 。东西栏杆墩共安装了直径为36 x 8英尺，钻杆直径为7.5英尺的竖井。该项目还包括在东，西两个天井墩的两个生产钻孔井上进行Osterberg Cell载荷测试。负载测试程序的结果用于微调钻孔竖井的设计。从可施工性的角度来看，事实证明，使用桩顶钻机进行反向循环钻井方法是对大直径深钻孔井筒的覆盖层和岩石承窝进行钻孔的绝佳选择。

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