Slurry Walls as an Integral Part of Underground Transportation Structures

摘要

The preliminary objective of this study was to determine the advantages of using slurry walls as a permanent part of underground transportation structures. This report presents a summary of advantages, disadvantages, and design problems most often encountered with slurry walls. Design alternatives and solutions to common problems are developed. Parametric studies allow easy comparison of various design approches for underground transportation structures. New design concepts are presented which take advantage of station geometry and material properties. An alternate design is developed using the new concepts and compared with an existing subway station in Washington, D.C. In a cost comparison between the alternate designs, it is shown that integrating slurry wall as a part of the permanent structure could have resulted in a $2 million savings. This is in addition to the savings already realized through the use of surry wall as temporary earth support during the excavation, in lieu of the flexible system. Thus, the potential combined savings attributable to the adaptation of slurry walls in the overall project would be quite significant.