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原文传递 Draft Manuals and Procedures for MLS Data Collection and Equipment Operation Including Plans for MLS Shakedown Test.

题名：	Draft Manuals and Procedures for MLS Data Collection and Equipment Operation Including Plans for MLS Shakedown Test.
作者：	HUDSON, W. R.; WHITE, R. P.
关键词：	Pavement-tests; Accelerated-testing.;Data-collection; Procedures-; Pavement-condition; Test-facilities; Instrumentation-; Renovation-; Planning-.
摘要：	In 1992, the Texas Department of Transportation (TxDOT) developed the Texas Mobile Load Simulator (TxMLS) manufactured by Victoria Machine Works (VMW), a steel fabrication company in Victoria, Texas. The equipment went through a series of tests at a site near Victoria. In 1995, the MLS was moved to the Ft. Worth District to conduct a comparative study of two rehabilitation processes on U.S. 281 near Jacksboro, Texas. The results of these tests and test procedures have been documented in a number of reports (Chen 2001; Hugo 1999). During the operation of the TxMLS in Jacksboro, the useful life of a number of mechanical components of the TxMLS were reached or exceeded. A number of repairs and technical adjustments were made to keep the equipment operating to the end of this test series. In 1999, a contract was signed with RGB, Inc. and a complete renovation of the TxMLS was undertaken, because it had fulfilled its original design life on field test sections. This renovation was undertaken to address several observed problems and to improve the performance and reliability of the TxMLS. The major planned improvements included: New axle bogies; new drive chain mechanism; reposition (lower) the two drive motors on separate support cradles; rebuild the load rails; redesign the load wheels and associated bearings; install new strain gauge system for monitoring tire loads; and new hydraulic system to set axle loads. The new hydraulic system will allow operators to apply more uniform loads and set the load levels more quickly. The heavy drive motors have been moved to separate cradles that position them closer to the ground. This rehabilitation effort proved to be a sizable task and a number of critical elements had to be redesigned several times in the process. This report will serve as a draft plan for the manuals and procedures for accelerated testing.
报告类型：	科技报告