File : pdf, 4.4 MB, 187 pages
TOC
CHAPT 1 – INTRODUCTION
1.1 PURPOSE
1.2 BACKGROUND
1.3 DOCUMENT ORGANIZATION
1.4 DUAL SYSTEM OF UNITS
CHAPT 2 – DEBRIS CHARACTERIZATION
2.1 DEBRIS CLASSIFICATION
2.1.1 Types of Debris
2.2 FLOW BEHAVIOR OF FLOATING DEBRIS
2.2.1 Debris Transport and Transport Mechanisms
2.2.2 Debris Jams and Debris Dams
2.2.3 Debris Accumulation
2.3 PROBLEMS ASSOCIATED WITH DEBRIS
CHAPT 3 – ESTIMATING DEBRIS QUANTITIES
3.1 INTRODUCTION
3.2 DEBRIS VOLUMES
3.3 POTENTIAL FOR DEBRIS DELIVERY
3.3.1 Task A: Estimating Potential for Debris Delivery to Site
3.3.2 Task B: Estimating the Largest Debris Size Delivered to Site
3.3.3 Task C: Assigning Location Categories to All Parts of the Highway Crossing
3.4 POTENTIAL FOR DEBRIS ACCUMULATION
3.4.1 Task A: Assigning Bridge Characteristics to All Immersed Parts of the Bridge
3.4.2 Task B: Determining Accumulation Potential for Each Bridge Component
3.5 SIZE OF DEBRIS ACCUMULATION AT STRUCTURES
3.6 FACTORS THAT AFFECT DEBRIS PRODUCTION
CHAPT 4 – ANALYZING AND MODELING DEBRIS IMPACTS TO STRUCTURES
4.1 INTRODUCTION
4.2 HYDRAULIC ANALYSES OF DEBRIS
4.3 ONE-DIMENSIONAL DEBRIS ANALYSIS MODELING
4.3.1 Data Requirements
4.3.2 Background of Modeling Methods and Approaches
4.3.2.1 Low Flow Conditions
4.3.2.2 High Flow Conditions
4.3.3 Scenarios for Hydraulic Modeling of Debris Accumulation
4.3.3.1 Bridge Debris Scenarios
4.3.3.2 Culvert Debris Scenarios
4.4 ADVANCED MODELING
4.5 LOCAL PIER SCOUR ASSOCIATED WITH DEBRIS ACCUMULATION
4.6 HYDRAULIC LOADING ASSOCIATED WITH DEBRIS ACCUMULATION
4.7 HYDRAULIC LOADING EXAMPLE PROBLEMS
CHAPT 5 – DEBRIS COUNTERMEASURES
5.1 BACKGROUND
5.2 COUNTERMEASURES FOR CULVERTS
5.2.1 Structural Measures
5.2.2 Non-structural Measures
5.3 COUNTERMEASURES FOR BRIDGES
5.3.1 Structural Measures
5.3.2 Non-Structural Measures
5.4 COUNTERMEASURES FOR FIRE DAMAGED / DEFORESTED AREAS
5.4.1 Fire Damaged Areas
5.4.2 Deforestation
CHAPT 6 – DESIGN PROCEDURES FOR DEBRIS COUNTERMEASURES
6.1 GENERAL PROCEDURES AND CONSIDERATIONS
6.1.1 Field Investigations
6.1.2 Selecting the Type of Countermeasures
6.1.3 Design for Bridges versus Culverts
6.1.4 Existing Structures Versus Proposed Structures
6.1.5 Maintenance Accessibility of the Countermeasure
6.2 DESIGN GUIDELINES FOR CULVERTS
6.2.1 Debris Deflectors for Culverts
6.2.1.1 Debris Deflector Example (Culvert)
6.2.2 Debris Racks for Culverts
6.2.2.1 Debris Rack Example (Culvert)
6.2.3 Debris Risers for Culverts
6.2.4 Debris Cribs for Culverts
6.2.5 Debris Fins for Culverts
6.2.6 Debris Dams / Basins for Culverts
6.2.7 Combined Debris Controls for Culverts
6.3 DESIGN GUIDELINES FOR BRIDGES
6.3.1 Debris Deflectors for Bridges
6.3.2 Debris Fins for Bridges
6.3.3 Crib Structures for Bridges
6.3.4 River Training Structures for Bridges
6.3.5 In-Channel Debris Basin for Bridges
6.3.6 Flood Relief Structures for Bridges
6.3.7 Debris Sweepers for Bridges
6.3.8 Design Features for Bridges
6.4 NON-STRUCTURAL GUIDELINES (DEBRIS MANAGEMENT)
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