A temporary internal bracing system would be required to support the open excavation given the limitation of the adjacent Transbay Transit Center’s simultaneously open excavation, limiting the ability for heavy equipment to work at the bottom of the hole. All 42 LBEs were constructed from existing grade, rather than the bottom of the 60-foot excavation. After the excavation was completed, full-length, pre-tied reinforcing steel cages were lowered into the bentonite-filled holes, and concrete was placed using dual tremie pipes. Excavation stability was maintained throughout the process using a recycling bentonite slurry system. Excavation then proceeded using a combination of a line-mounted clam shell in the sands and clay, switching to a hydrofraise when denser rock material was encountered. This collaborative profit-sharing initiative is easily replicable and a prime example of how circular business models can fund public spaces and sustainable urban development.Installation of the foundation system included first the construction of guide walls to control the location and excavation of the LBEs. Despite the low percentage given to the project, it provided enough support capital to ensure the park could remain public and enjoyed by all.

However, the project share was relatively small, and the property owners would gain most of the profits. Such a redevelopment and feature in any part of a city, regardless of the exact locality, undoubtedly adds significant value to nearby properties.ĭevelopers struck a deal with owners to share a certain percentage of this rise in property value.

Except proposed an innovative profit-sharing scheme to help fund the park, encourage cooperation and actively involve nearby residents and developers with the complex.įirst, properties surrounding the park were valued by an independent and well-established third party and compared to future values - projected to five years after its completion.

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