Abstract
Transportation agencies are currently challenged to keep up with culvert infrastructure that is rapidly deteriorating due to lack of adequate maintenance and capital improvement. It is imperative for the transportation agencies to identify and rehabilitate deteriorated culverts prior to their failures. Among several concerns, lack of rational rehabilitation prioritization tools is foremost. Complicating this need further, current practices vary widely across the state departments of transportation (DOTs) which makes it difficult to develop a universal approach for prioritizing failing culverts. This paper presents and demonstrates a failure risk-based culvert prioritization approach that is compliant with the inspection procedures of the South Carolina DOT. The approach presented in this paper is specifically developed for reinforced concrete pipe (RCP) and corrugated metal pipe (CMP) materials because of their wide popularity. Outcomes from a survey of state DOTs informed the development of parametric weightings using the principles of analytical hierarchy process (AHP). Weightings developed for several critical inspection parameters are combined with the corresponding condition assessment scores to determine the failure criticality of culverts, which are subsequently combined with estimated failure consequences to determine failure risk estimates. The prioritization approach is demonstrated using the condition assessment scores of over 5200 culvert structures in South Carolina.
Highlights
Culvert structures are crucial transportation assets that facilitate the passage of natural water flow across roadways from beneath
This paper presented and demonstrated a failure risk-based prioritization method for identifying critical culvert structures that need further inspection and possible rehabilitation
The failure risk assessment method was developed based on the analytical hierarchy process (AHP) using the defect weightings developed from the outcomes of a nation-wide survey of transportation agencies carried out as part of a research study (Piratla and Pang, 2017) sponsored by the South Carolina Department of Transportation
Summary
Culvert structures are crucial transportation assets that facilitate the passage of natural water flow across roadways from beneath. Bridges and pavements often get higher priority than culverts in terms of maintenance and capital improvement resources of transportation agencies. This seeming disregard for culvert infrastructure is often attributed to its invisibility from the surface, unlike the very visible bridge and pavement issues. EImnfrearsgtreunctcuyresre2p01a9i,r4c, oxsFtOsRanPdEEtRheREreVsIuEWlting inconvenience due to traffic congestion and detours often 2teonfd to be prohibitively expensive, especially in high traffic zones. It is imperative for transportation aagnednciepsroto-atcatikveelcyognreizhaanbcileitoaftethedsettaetreioorfattehdeirccruitlivcearlt icnufrlvaestrrtus ctbuerfeoarend tphreoir-acitmivmelyinreenhtabfialiiltuatree. TenhteorfisTkr-abnasspedorptaritoiorintiz(SaCtiDonOaTp)p, risoapcrhesiesnptreidmianritlhyids epvaeploepr.eTdhfeorrirsekin-bfoarsceedd pcroionrcirteizteatpioipneap(RpCroPa)cahnids pcorirmruagrailtyeddemveetlaolppedipfeor(CrMeinPf)ocrcuelvdecrotsn, cwrehteichpiparee(RthCePt)waondmcoosrtrpuogpatueldar mcuetlvalerptipmea(tCerMiaPls)icnuulvseerctus,rrwehnitclyh. aTrheethperotpwoosemdopsrtioproiptizualatirocnualvpeprrtomacahteirsiaallssoindeumseocnusrtrraetnetdlyi.nTthheis pproappoerseudspinrigortihtiezaitniospneacptipornoadchatias aolfsomdoerme otnhsatnrat5e2d00inctuhilvs epratps,eravuasiinlagbtleheininstpheectSioCnDdOaTta’sofcumlvoreert thinavne5n2to00rycudlavtearbtass, ea.vailable in the SCDOT’s culvert inventory database
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