Olive Court Condominiums

Project Overview

The city of Philadelphia has been in the midst of a 21st century townhouse and condominium building boom as it rediscovers its historic and cultural heritage. Such projects present a common challenge with regard to protecting adjacent historic structures. As new modern basements are extended below the old ones, underpinning of those adjacent structures is needed. In one such project, known as Olive Court, GeoStructures was hired by Taney Construction to design a safe and cost-effective underpinning system for an adjacent, historic, three-story stone masonry townhouse.

Upon inspecting the foundation wall, GeoStructures’ engineers determined that it could sustain point loads from a helical pier type of support system, which is more economical than a conventional concrete pier option. Our design called for thirteen, 12- to 15-ft long, 20-ton capacity, helical steel pier elements connected to the base of the wall using heavy duty steel brackets. Since the helical piers were spaced about every 32 in., no other connections were necessary as the wall was capable of bridging between the brackets. GeoStructures prepared design drawings, specifications, and details for the project, and oversaw settlement monitoring by the project civil engineer. We were also on-site during construction to inspect pre-augering, installation of helical piers, grouting, and jacking of the brackets to load the piers. The contractor installed the piers into the ground using a terminal torque of 8,000 ft-lb to achieve their design capacity of 20 tons. Even with the close pier spacing, this system ended up being about half the cost of conventional concrete underpinning piers.

Support of Excavation and Underpinning

Foundation Investigation and Design

Our Comprehensive Project Workflow: Step-by-Step Guide

01.

Initial Consultation and Client Needs Assessment

Our team responds promptly to your inquiries, ensuring timely communication and immediate attention to your project needs. We work closely with clients to understand all project requirements, ensuring that we capture every detail and objective from the start.

02.

Development of Work Plan

Our expert project managers extend innovative problem-solving to project planning, resulting in technically-sound, cost-effective work plans to better serve our clients.

03.

Project Proposal and Agreement

We provide a detailed project proposal outlining the scope of work, fee schedule, and agreement terms. The project begins once the proposal is approved.

04.

Execution and Quality Assurance

Our highly skilled team of principals, project managers, engineers, and field staff execute the project with precision, maintaining open communication to ensure alignment with client expectations. Each project undergoes a rigorous quality check by our team of licensed professional engineers, ensuring all deliverables meet our high standards of excellence.

05.

Project Delivery and Invoicing

Upon completion, we deliver the final project and issue an invoice for the completed work, ensuring full transparency and satisfaction.