United States Department of Transportation
i
Dynamic Pile Monitoring mid Pile Load Test Report Proposed Deep River Bridge (Washington State Highway) Deep River, Washington
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1988-09-01
[PDF-1.46 MB]
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Abstract:Field demonstrations for Demonstration Project 66, Design and Construction of Driven Pile Foundations, include: (1) Dynamic pile monitoring by pile analyzer (field computer); and (2) Static pile load testing using a mobile pile load testing frame. The equipment and technical assistance are made available to requesting State highway departments and Federal Highway Administration (FHWA) Direct Federal Divisions. The Washington State Department of Transportation (WSDOT) requested the use of the pile analyzer for the construction stage load test program for the subject project. The static load test was conducted by WSDOT personnel and did not use the Demonstration Project 66 mobile pile load testing frame. The purpose of the load test program was: (1) To confirm the design load on the timber and steel pipe composite piles; (2) to confirm the drivability of these piles; and (3) to demonstrate the use of newer and more accurate techniques for pile driving construction control. The load test program will reduce the uncertainties involved in driving piles and may reduce the total length of pile driven. Pile foundation cost savings and increased certainty of pile capacity were the main purposes for this load test program. The field work was performed over a six week period during June and July 1988. The dynamic load tests were performed by Mr. Herbert Clark, Civil Engineering Technician in the Demonstrations Projects Division of the FHWA. The static load tests were performed by Mr. T. Harrison, Geotechnical Engineer with WSDOT. Mr. Barry Siel, FHWA Highway Engineer Trainee provided assistance in conducting dynamic and static load tests. WSDOT personnel performed wave equation analysis and structural design of the load frame and dead load used as the reaction system. The piling contractor, Quigg Brothers, for the load tests was also the construction piling contractor as the load tests were a part of the main construction contract. During field testing, informal presentation of dynamic test results and analysis were made to WSDOT engineers. A detailed description of the work performed, test results, data analysis, and recommendations follow in this report. "CAPWAP" (Case Pile Wave Analysis Program) analysis of dynamic test data was performed by Pile Dynamics, Inc. of Cleveland, Ohio and the results are included in this report.
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