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Lightweight Design Alternative for I-95 Reconstruction in Philadelphia

机译：Philladelphia I-95重建的轻量级设计替代品

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A section of Interstate 95 in Philadelphia, Pennsylvania, was to be widened, requiring new construction of abutments, wing walls, and retaining walls. The overburden consisted of surficial soft/loose alluvium overlying very dense sands and gravels. Jet grouting ground improvement was initially specified to provide acceptable performance of shallow foundations for the proposed structures. However, the relatively small work zones and close proximity to adjacent structures would be problematic for jet grouting operations. An alternative design which featured lightweight cellular concrete backfill was subsequently developed. The premise of the design alternative was to provide a structure that was light enough to minimize vertical deformation and yet heavy enough to provide overturning and sliding resistance required for adequate stability. This paper discusses the developed methodologies used in the design alternative, construction of the design alternative, and results of a settlement monitoring program.
机译：宾夕法尼亚州费城的95号州际公路部门是扩大的，需要新建基台，翼墙和挡土墙。覆盖层由覆盖非常致密的沙子和砾石的表层柔软/松弛。最初指定喷射灌浆地面改善以提供所提出的结构的浅层基础的可接受性能。然而，相对较小的工作区域和对相邻结构的靠近近距离射流灌浆操作是有问题的。随后开发了一种具有轻质蜂窝混凝土回填的替代设计。设计替代方案的前提是提供一种足以最小化垂直变形的结构，并且足够重，以提供足够稳定性所需的推翻和滑动阻力。本文讨论了设计替代，设计替代方案的构建和结算监测程序的结果的开发方法。

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