详情

Lateral Pile Resistance Behind MSE Wall Abutments -and- Steel Corrosion in Slag Fill

项目名称：	Lateral Pile Resistance Behind MSE Wall Abutments -and- Steel Corrosion in Slag Fill
摘要：	Abutment piles are frequently surrounded by mechanically stabilized earth (MSE) walls rather than a soil slope. Limited testing indicates that piles close to MSE walls will provide significantly less lateral resistance. In addition, lateral pile loading can cause pullout of MSE reinforcement and distortion of the MSE wall facing. There are presently no methods available to predict the reduction in pile resistance or the increase in force on the walls for these conditions. In addition, little guidance is available regarding the spacing behind the wall necessary to eliminate these effects. Objectives of the study include (1) Determine reduced lateral pile resistance vs. distance behind MSE wall from full-scale testing; (2) Determine increase in wall force due to lateral load on the pile; (3) Develop p-multiplier vs. distance relationships to account for reduced pile resistance in LPILE; and (4) Develop equations to predict increased force on MSE reinforcement due to lateral pile loading. Tasks of the study include (1) Conduct lateral load tests at three bridge sites with piles at variable spacings behind the MSE walls; (2) Develop relationships showing reduction in lateral resistance versus spacing behind wall; (3) Develop relationships showing increase in lateral force on MSE wall panel versus spacing behind wall; (4) Supplement field test results with calibrated results from finite element method (FEM) analysis; (5) Calibrate p-multipliers in LPILE to account for reduced resistance versus spacing; and (6) Prepare the final report. A secondary scope on this contract includes evaluation of steel pipe piles extracted from abutment slag fill from an old bridge, to examine the apparent corrosion rate applicable in these conditions. A technical memorandum summarizing findings from this secondary scope will be prepared and shared with UDOT and interested consultants/contractors.
状态：	Active
资金：	60541.00
资助组织：	Utah Department of Transportation
项目负责人：	Stevens, David
执行机构：	Brigham Young University
开始时间：	20090701
实际结束时间：	20130301
主题领域：	Bridges and other structures；Design；Geotechnology；Highways