Experimental Evaluation of Deteriorated CMPs Retrofitted by Different Non-invasive Approaches

• Published in: KSCE journal of civil engineering Vol. 25; no. 11; pp. 4335 - 4347
• Main Authors: Alam, Shaurav, Manzur, Tanvir, Matthews, John, Bartlett, Chris, Allouche, Erez N.
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Civil Engineers 01.11.2021; Springer Nature B.V; 대한토목학회
• Subjects: Civil Engineering; Corrosion; Deterioration; Earth pressure; Engineering; Geotechnical Engineering & Applied Earth Sciences; High density polyethylenes; Industrial design; Industrial Pollution Prevention; Metals; Overburden; Pressure distribution; Public safety; Retrofitting; Soil; Steel pipes; Structural Engineering; 토목공학; United States > US; Iowa; Modified Iowa equation; Rehabilitation method; Soil-CMP Interaction; Soil pressure distribution; Deflection; Corrugated metal pipe
• ISSN: 1226-7988; 1976-3808
• DOI: 10.1007/s12205-021-2236-6

Corrugated metal pipes (CMPs) deployed across North America are in various states of deteriorations with diminishing structural health that can cause road failure and pose serious threat to public safety. This paper presents an extensive experimental study conducted on deteriorated and retrofitted CMPs, and compares the results with available analytic approach — Modified Iowa equation. Simulated deterioration was performed on the new CMPs using mechanical approach and later, those CMP specimens were retrofitted using four different non-invasive methods. The specimens were tested under five different overburden pressures. Responses of the soil-pipe systems for deteriorated and rehabilitated specimens in terms of surrounding soil pressure and deformations at crown, spring-line, and invert were recorded and compared. It was found that the soil envelops and the CMPs experienced considerable change in pressure and deflections, respectively due to deterioration. However, rehabilitation using all the invasive approaches helped to regain soil pressures and deflections close to the original state, indicating their viability. The measured deflections from experimental studies were also compared with the predicted values obtained from the Modified Iowa equation. Such comparison is of immense importance to establish design guidelines for rehabilitated liner-CMP culvert systems.