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原文传递 MONITORING AND PLANS FOR ACTION FOR BRIDGE SCOUR: INSTRUMENTS AND STATE DEPARTMENTS OF TRANSPORTATION EXPERIENCES.

题名：	MONITORING AND PLANS FOR ACTION FOR BRIDGE SCOUR: INSTRUMENTS AND STATE DEPARTMENTS OF TRANSPORTATION EXPERIENCES.
作者：	Richardson-EV; Pagan-Ortiz-JE; Schall-JD; Price-GR
关键词：	Bridge-management; Bridges-; Case-studies; Countermeasures-; Evaluation-and-assessment; Instrumentation-; Monitoring-; Plan-of-action; Scour-; State-departments-of-transportation
摘要：	There are more than 484,000 bridges over waterways in the U.S. Bridge Inventory. In 1988 the Federal Highway Administration (FHWA) issued a Technical Advisory (TA) to guide states in evaluating bridges over waterways for vulnerability to failure from scour. The evaluation to date has identified 26,140 bridges as scour-critical. These bridges require replacement or countermeasures to protect them from failure. The TA recommends that a Plan of Action (POA) be developed for each scour-critical bridge. Monitoring a bridge for scour, combined with a POA that details procedures if scour threatens a bridge, is an acceptable countermeasure. Research sponsored by the FHWA and Transportation Research Board has developed several fixed and portable scour-monitoring instruments. Fixed instruments are low-cost sonar, buried stainless steel pipe with a magnetic sliding collar, and float-out cylinders with radio transmitters. These instruments can use solar panel with battery for power, data loggers to store the data, and telemetry to send the data to central locations so personnel can act if the bridge is in danger of failure. The portable instruments include sounding weights, rods, fathometers, and geophysical devices. This study describes the instruments and experience with their installation.
总页数：	Conference Title: 9th International Bridge Management Conference. Location: Orlando, Florida. Sponsored by: Transportation Research Board
报告类型：	科技报告