The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.
A proposed Red River Structure (RRS), intended to function as one of three gated structures comprising the Fargo-Moorhead Metropolitan Area Flood Risk Management Project, was tested in a general physical model. A 1:40 Froude-scale was applied to model the structure, engineered channels, existing bathymetry/topography in the Red River and overbank areas, and the proposed Southern Embankment. The physical model was used to ensure that the RRS could pass at least 104,300 cfs during the Probable Maximum Flood while maintaining a maximum pool water surface elevation of 923.5 ft. The physical model was also utilized to optimize the approach structure, stilling basin, retaining walls, and erosion protection designs. The physical modeling effort resulted in an optimized stilling basin wall, retaining wall, and end sill geometry/configuration where erosive conditions were not observed outside and adjacent to the stilling basin. Properly designed riprap (St. Paul District's R470 gradation) proved to be successful in protecting the proposed RRS from potential scour downstream. The modified approach wall design proved to be successful in creating safe approach flow conditions as well as acceptable flow separation patterns. It is recommended that Alternative 3 be the design used going forward. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.
ABSTRACT:Upper lock approach guari walls are stmctural features used by towboats to align with and enter the lock chamber. This report focuses on guard walls located in the upper lock approach. The performance of these guard walls drastically impacts the ftinctional efficiency of easy given lock. An efficient gua«i wall minimizes pilot maneuvering required to bring a tow to rest or near rest on the guard wall and align with and enter the lock chamber. In addition, guard walls are a major component in overall project cost.Criteria for e\'aluating guaid wall performanre are general and limited. This report provides guidance m that engineers can design lock ^preach pjaid walls that are safe and efficient to the urers, while being cost-eflfecti\re. Both pl^'sical and numerical models were u^ to telp research guard wall d^gn and develop guidanre for design A literature review was x^si to assist in identi^dng pertinent design reeds and to develop the testing and evaluation program. A ptysical model was constructai m that a detailed evaluation could be performed for selectai pjard wall designs. A numeriral model was u^ to help r^idly e^'ahiate numerous designs and identify the d^gns to refiiK in the plysical model. DISCLAIMER:The contents of this report are not to be used for ad%'ertising, publication, or promotional purposes. Citation of trade names does not constitute an official endoreement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to te constraed as an official Department of the Army position unless so designated by other authorized documents. DESTROY THIS REPORT WHEN IT B NO LONGER NEEDED. DO NOT RETURN TO ORIGMATOR.
A proposed pier nose extension intended to reduce the local pier scour at the Burlington Northern Santa Fe Railway crossing on the Santa Ana River near Corona, CA, was tested in a general physical model. The applied model was a 1:30 Froude-scaled model of the bridge piers, other related structures, and the adjacent channel. Data from the model provided a qualitative and quantitative evaluation of the local scour behavior at the estimated worst-case scenarios for both the existing and proposed conditions. The existing conditions represent the current prototype configuration exposed to potentially larger future dam releases from the upstream Prado Dam. The proposed condition includes pier nose extensions, concrete caps (pile enclosures), and flow guide walls, all intended to reduce scour at the bridge. The primary location for the minimum scour elevation (maximum scour depth) occurred around pier set 5. The proposed conditions showed as high as 60% improvement in reducing the scour depth with the proposed conditions configuration. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents. DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents. DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR.
No abstract
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.