Hyatt Place – Portland, ME

Client: Consigli Construction Company, Inc.

HBF designed and installed an excavation support system approximately 200′ long to allow for construction of a new multi-story hotel directly against an existing property line. This system supported excavations of up to 21′ and allowed our customer to place concrete directly against the shoring wall, maximizing the building footprint and minimizing the time required to complete the foundations and begin erecting steel.

In addition to the tight tolerance requirement, HBF had to design and install an excavation support system that would allow for excavation through weathered rock and into rock suitable for supporting a heavily loaded foundation. We were able to accomplish this by using our drilling equipment to install drilled in place soldier piles. Lastly, the system had to be installed utilizing methods that would not transmit any vibration to the electrical transmission equipment at the adjacent property.


Jobsite Photos

Partially installed excavation support system. The property line in this photo is represented by the chain link fence in the background. Proximity to electrical transformers is also shown in this photo.

Partially installed excavation support system. The property line in this photo is represented by the chain link fence in the background. Proximity to electrical transformers is also shown in this photo.

This photo shows some of the drilled in place soldier piles as well as a few of the raking braces used to temporarily support the shoring system.  Note the level of flexibility that this type of construction allows for when excavating to an inconsistent rock surface.

This photo shows some of the drilled in place soldier piles as well as a few of the raking braces used to temporarily support the shoring system. This photo illustrates the level of flexibility that this type of construction offers when excavating to an inconsistent rock surface.

Installing timber lagging as the excavation progressesInstalling timber lagging as the excavation progresses.

This photo shows the excavation support system in place following placement of a leveling slab for the foundation. Once the foundation was placed to a predetermined elevation, the raking braces and wales were removed in order to allow for a continuous wall placement above existing grade.

This photo shows the excavation support system in place following placement of a leveling slab for the foundation. Once the foundation was placed to a predetermined elevation, the raking braces and wales were removed in order to allow for a continuous wall placement above existing grade.

Cleaning the exposed rock prior to installation of rock dowels and concrete. Cleaning the exposed rock prior to installation of rock dowels and concrete.