Pennsylvania Turnpike Open-End Geotechnical Investigations

Project Overview

GeoStructures has served numerous open-end geotechnical service contracts for the Pennsylvania Turnpike Commission. Three notable services involve finite element method (FEM) analysis, lime stabilization, and air void analysis of hardened concrete.

In one contract, GeoStructures utilizes finite element method (FEM) analysis to model distressed pavement joints between concrete slabs, and to investigate the effects of mesh reinforcement on rehabilitation. Specifically studied are the contribution factors of pavement joint deterioration due to loss of support, aggregate interlock and dowel bars, as well as the effectiveness of steel mesh reinforcement in retarding reflective cracking through an asphalt overlay.

In another contract, GeoStructures implements a pilot program to evaluate all aspects of lime and cement stabilization construction, such as hydration, mixing, mellowing, stabilization depth and uniformity, and compaction including roller specifications. Forensic studies compare the effects of frost heave for stabilized and non-stabilized soils.

In a third contract, GeoStructures performs air void analysis in accordance with PennDOT PTM 623, “Method of Test for Air Content of Hardened Concrete” and ASTM C457, “Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete” (modified point count method). Calculated parameters include total air void content, specific surface, spacing factor, void frequency, paste-air ratio, and the relative percentages of cement paste, aggregate, and air voids.

Asphalt Testing

Petrographic Analysis

Pavement Design and Rehabilitation

Lime and Cement Stabilization

Forensic Evaluations

Highway and Bridge Geotechniques

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.