A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Forensic Investigation of Sections
The Ohio Strategic Highway Research Project (SHRP) Test Road, constructed on U.S. 23 about 25 miles (40 km) north of Columbus, Ohio, consists of forty test sections in the SHRP SPS-1, SPS-2, SPS-8, and SPS-9 experiments. During the summer of 2002, after the appearance of localized distress in Section 390103, a forensic study of this and Sections 390108, 390109, and 390110 in the SPS-1 (Asphalt Concrete) experiment was completed through a series of destructive and non-destructive tests. Distress surveys were conducted on these four sections in accordance with SHRP-P-338 "Distress Identification Manual for the Long-Term Pavement Performance Project." Non-destructive testing included Falling Weight Deflectometer (FWD), transverse profiling, and Dynamic Cone Penetration tests (DCP). Trenches were excavated at locations with various levels of distress to measure transverse layer profiles, and to obtain material samples for laboratory testing. Collected data was analyzed to determine the causes of localized distresses. The investigation revealed substantial variability in stiffness and high levels of moisture in the subgrade soil at all four pavement sections. These trends indicate that the severity of distress in Sections 390108, 390109, and 390110 would soon be similar to those in Section 390103 if the sections were left open to traffic. Despite the use of various base materials and the presence of edge drains in Sections 390108, 390109 and 390110, higher than anticipated levels of subgrade soil moisture reaching saturation were present in all four pavement sections. Excessive moisture was determined to be the underlying cause of rutting and cracking. While edge drains probably removed some moisture infiltrating down from the pavement surface, they provided little relief from moisture migrating up through the subgrade.
Forensic Investigation of Sections
The Ohio Strategic Highway Research Project (SHRP) Test Road, constructed on U.S. 23 about 25 miles (40 km) north of Columbus, Ohio, consists of forty test sections in the SHRP SPS-1, SPS-2, SPS-8, and SPS-9 experiments. During the summer of 2002, after the appearance of localized distress in Section 390103, a forensic study of this and Sections 390108, 390109, and 390110 in the SPS-1 (Asphalt Concrete) experiment was completed through a series of destructive and non-destructive tests. Distress surveys were conducted on these four sections in accordance with SHRP-P-338 "Distress Identification Manual for the Long-Term Pavement Performance Project." Non-destructive testing included Falling Weight Deflectometer (FWD), transverse profiling, and Dynamic Cone Penetration tests (DCP). Trenches were excavated at locations with various levels of distress to measure transverse layer profiles, and to obtain material samples for laboratory testing. Collected data was analyzed to determine the causes of localized distresses. The investigation revealed substantial variability in stiffness and high levels of moisture in the subgrade soil at all four pavement sections. These trends indicate that the severity of distress in Sections 390108, 390109, and 390110 would soon be similar to those in Section 390103 if the sections were left open to traffic. Despite the use of various base materials and the presence of edge drains in Sections 390108, 390109 and 390110, higher than anticipated levels of subgrade soil moisture reaching saturation were present in all four pavement sections. Excessive moisture was determined to be the underlying cause of rutting and cracking. While edge drains probably removed some moisture infiltrating down from the pavement surface, they provided little relief from moisture migrating up through the subgrade.
Forensic Investigation of Sections
Sargand, S. M. (author) / Khoury, I. S. (author) / Figueroa, J. L. (author)
Fourth Forensic Engineering Congress ; 2006 ; Cleveland, Ohio, United States
Forensic Engineering (2006) ; 286-301
2006-10-03
Conference paper
Electronic Resource
English
Forensic engineering investigation
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