Design riprap for a channel in erodible soil on a slope of 0.04 and a maximum depth of 7.3 ft using the FHA Method. Determine the size of riprap required.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
**Riprap Design for Erodible Soil on a Channel Slope**

To maintain channel stability and prevent erosion, the design of riprap is crucial, particularly in areas with erodible soil. In this example, we will design riprap for a channel with the following conditions:
- Slope: 0.04
- Maximum depth: 7.3 ft

We will use the FHA (Federal Highway Administration) Method to determine the required size of the riprap.

**Problem Statement:**
Design riprap for a channel in erodible soil on a slope of 0.04 and a maximum depth of 7.3 ft using the FHA Method. Determine the size of riprap required.

**Solution:**

1. **Input Parameters:**
   - Channel slope: 0.04
   - Channel depth: 7.3 ft

2. **Method Used:**
   Federal Highway Administration (FHA) Method. 

3. **Steps to Calculate Riprap Size:**
   - Determine the design shear stress.
   - Calculate the size of stone required to resist the design shear stress.
   - Ensure that the selected riprap size is stable for anticipated flow conditions.

By using these standard engineering practices and calculations, we can derive the appropriate size for the riprap that will successfully protect the channel from erosion for the given conditions.

Note: In a practical scenario, you would apply specific equations from the FHA Method to perform these calculations. It usually involves determining a stone size that will resist displacement due to channel flow and adjusting for site-specific parameters like flow velocity, stone specific gravity, and other pertinent factors.
Transcribed Image Text:**Riprap Design for Erodible Soil on a Channel Slope** To maintain channel stability and prevent erosion, the design of riprap is crucial, particularly in areas with erodible soil. In this example, we will design riprap for a channel with the following conditions: - Slope: 0.04 - Maximum depth: 7.3 ft We will use the FHA (Federal Highway Administration) Method to determine the required size of the riprap. **Problem Statement:** Design riprap for a channel in erodible soil on a slope of 0.04 and a maximum depth of 7.3 ft using the FHA Method. Determine the size of riprap required. **Solution:** 1. **Input Parameters:** - Channel slope: 0.04 - Channel depth: 7.3 ft 2. **Method Used:** Federal Highway Administration (FHA) Method. 3. **Steps to Calculate Riprap Size:** - Determine the design shear stress. - Calculate the size of stone required to resist the design shear stress. - Ensure that the selected riprap size is stable for anticipated flow conditions. By using these standard engineering practices and calculations, we can derive the appropriate size for the riprap that will successfully protect the channel from erosion for the given conditions. Note: In a practical scenario, you would apply specific equations from the FHA Method to perform these calculations. It usually involves determining a stone size that will resist displacement due to channel flow and adjusting for site-specific parameters like flow velocity, stone specific gravity, and other pertinent factors.
Expert Solution
steps

Step by step

Solved in 4 steps with 2 images

Blurred answer
Knowledge Booster
Measuring masonry work
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Structural Analysis
Structural Analysis
Civil Engineering
ISBN:
9781337630931
Author:
KASSIMALI, Aslam.
Publisher:
Cengage,
Structural Analysis (10th Edition)
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Sustainable Energy
Sustainable Energy
Civil Engineering
ISBN:
9781337551663
Author:
DUNLAP, Richard A.
Publisher:
Cengage,
Traffic and Highway Engineering
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning