详情

Live Load Effects of Railroads on Retaining Walls and Temporary Shoring

项目名称：	Live Load Effects of Railroads on Retaining Walls and Temporary Shoring
摘要：	Highway construction activities sometimes require retaining walls and temporary shoring in close proximity to railroads. Railroad loading typically involves a large component of live load surcharge on retaining structures relative to most other situations. Current design guidelines for estimating live load effects can give widely varying predictions of loads and deflections. In the case of shored systems, the requirements for allowable deflections are quite strict. Thus, uncertainty in predicting live load effects coupled with the strict deflection limitations can lead to uneconomical designs. To address this problem, the research will comprise three major thrusts: monitoring instrumented cantilever and soldier pile/lagging test sections constructed by the Union Pacific Railroad (UPRR), numerical modeling to extrapolate the results to other wall types and soil conditions, and evaluation/modification of existing design methodology. The field instrumentation program will measure lateral wall deflections, vertical settlement of the railroad track, and strains in the walls. Data will be collected during installation to evaluate system response to soil self-weight loading, when trains pass to measure live surcharge load effects, and cumulative deformations over time. A research report will document the findings and provide recommendations for improved design methods for more economical railroad underpass structures.
状态：	Completed
资金：	399591.00
资助组织：	Texas Department of Transportation
项目负责人：	Jensen, Darrin
执行机构：	Texas Transportation Institute
开始时间：	20120912
实际结束时间：	20140831
主题领域：	Bridges and other structures；Construction；Geotechnology；Highways；Railroads