Post-tension running track

Abstract

Systems and methods for providing a running track having a reinforced base using post-tensioning are provided herein. In one exemplary configuration, the track comprises a reinforced concrete slab base that is poured over and around post-tensioning cables suspended therein. The post-tensioning cables include transverse cables that extend transversely across the base, and lengthwise cable structures extending lengthwise through the base. Each lengthwise cable structure includes a series of individual segments that are joined end-to-end to form respective continuous loops and are individually tensioned. The lengthwise cable structures thus exert compressive forces on the base that are continuous and uninterrupted about the circumferential length of the track. Moreover, the lengthwise cable segments are joined / tensioned from within voids initially formed within the concrete base and, after tensioning, these voids are filled with concrete to provide a concrete base having a uniform top surface that can also be covered in a running surface.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The invention relates to running track constructions and more particularly to a running track having a post-tensioned concrete base.BACKGROUND OF THE INVENTION[0002]Track and field sporting events are commonly held on running tracks. As would be understood by those in the art, running tracks come in various sizes and configurations that can vary depending on the standards implemented by different athletic organizations. Typically the main portion of the running track has an oval shape defined by two opposing semi-circular end sections or “turns” that are connected by two parallel and opposing rectangular side areas.[0003]In some instances the base and the surface of the track (i.e., the useable surface that competitors run on) are defined by a single structure. However, in some configurations, the track is a composite structure defined by multiple substrate layers and multiple different materials. Typically, in such composite configurations, a c...

AI Technical Summary

Problems solved by technology

Cracking or irregularities in the level of the base often occurs in concrete slab surfaces and asphalt bases due to the expansion or contraction of the ground that supports the slab and the areas surrounding the base.

These stresses can result in deformation of the base and cracking if the stresses exceed the tensile strength of the base.

By way of further example, moisture trapped within the base can also cause stresses and cracking of the base, for instance due to freezing and expansion of the moisture.

These conditions can result in cracking, which allows water and other environmental elements to further deteriorate the base and any metal structural reinforcements within the slab.

The foregoing problems are common to various floating slab constructions.

Images