01506333

Component

Many culverts in North America are in various states of deterioration resulting in diminished structural and/or hydraulic capacities. A culvert’s failure could result in road subsidence or even collapse, leading to serious consequences for vehicular traffic and public safety. The goal of this research is to establish distress and failure mechanisms for rehabilitated culverts made from corrugated metal and concrete pipes, as well as liner-culvert-soil interaction mechanisms, in support of the development of sound design methodologies for these repairs. A series of tests were performed on deteriorated 24-inch metal culverts prior to and following rehabilitation using various trenchless lining methods. This research employed either exhumed deteriorated corrugated metal pipe culverts or corrugated metal pipes deteriorated mechanically by removing 25 percent of the metal within a pre-determined arc along the lower half of the culvert. Culvert specimens were carefully bedded, backfilled, and compacted in soil within a test chamber, and then loaded using a pneumatic loading system to simulate deep burial conditions. Deformation and strains were measured at multiple locations around the circumference of the culvert’s structure during application of load, while earth pressure cells recorded stresses in the embedment zone. The deformed culvert was then rehabilitated using a cured-in-place liner, a slip liner, or a spiral-wound liner, and external load was re-applied. Numerical simulation of culvert was also performed using ANSYS. Responses of the deteriorated and rehabilitated soil-pipe systems were recorded and compared. The results revealed that the degree of compaction of the bedding materials plays a critical role in determining the stress distributed on the culvert.

This paper was sponsored by TRB committee AFF70 Culverts and Hydraulic Structures.

01503729

14-5578

English

13p

2014

Transportation Research Board 93rd Annual Meeting

Digital/other

Figures; Photos; References; Tables

Concrete pipe; Corrugated metals; Culverts; Deterioration; Rehabilitation; Soil structure interaction; Trenchless technology

ANSYS (Computer program)

North America

Bridges and other structures; Geotechnology; Highways; Maintenance and Preservation; I42: Soil Mechanics; I60: Maintenance

Transportation Research Board Annual Meeting 2014 Paper #14-5578

TRIS, TRB, ATRI

Jan 27 2014 3:57PM