Background The Blue River runs beneath Old Bridge, which is 5 m above the river bed (the gap between the bed and the lowest points of the bridge construction is 5 m). The river has uniform and trapez...

Question

Question

Background The Blue River runs beneath Old Bridge, which is 5 m above the river bed (the gap between the bed and the lowest p

Background The Blue River runs beneath Old Bridge, which is 5 m above the river bed (the gap between the bed and the lowest points of the bridge construction is 5 m). The river has uniform and trapez...

Background The Blue River runs beneath Old Bridge, which is 5 m above the river bed (the gap between the bed and the lowest points of the bridge construction is 5 m). The river has uniform and trapezoidal cross section, with width b-5m IV:2H (i.e., 1 m change of vertical elevation corresponds to 2 m change along the horizontal direction; see Figure 1). The level of water in the Blue River has dramatically increased due to rapid urbanisation along its banks, which caused runoff rates to increase due to increased level of paved surfaces It has been estimated that during new peak flow, Q 280 m3/s, the water level will be 6 m in front of the bridge, therefore flooding the bridge. at its bottom and slopes of Figure I.Cross section of the Blue River in proximity of Old Bridge: m-2 (i.e, the slope of the sides of the channel is 1V2H Tasks Design some structural modifications of the cross section that will allow the level of the river to lower locally, thus protecting Old Bridge from flooding. Possible structural modifications entail An elevation of the river bed, and A contraction of the channel width.

engineering Civil-Engineering

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

THE WATER LEVEL IN THE RIVER IS REDUCED BY INCREASING THE RIVER BASE WIDTH TO 16m AND SIDE SLOPE IS CHANGED TO 1V : 0.9H.

THE CALCULATIONS ARE SHOWN IN THE PICTURES BELOW

2 Avea of trapeium whem h 6m Top uoidh2+512 12m om 29… 会ニ尘h (ath) Inerease in orea A, As Now-the bed width must be modified s

Add a comment

Answer 2

Background The Blue River runs beneath Old Bridge, which is 5 m above the river bed (the gap between the bed and the lowest points of the bridge construction is 5 m). The river has uniform and trapez...

Homework Answers

Add Answer to:
Background The Blue River runs beneath Old Bridge, which is 5 m above the river bed (the gap between the bed and the lowest points of the bridge construction is 5 m). The river has uniform and trapez...

Post as a guest

Earn Coins

Background The Blue River runs beneath Old Bridge, which is 5 m above the river bed (the gap between the bed and the lowest points of the bridge construction is 5 m). The river has uniform and trapez...

Homework Answers

Add Answer to: Background The Blue River runs beneath Old Bridge, which is 5 m above the river bed (the gap between the bed and the lowest points of the bridge construction is 5 m). The river has uniform and trapez...

Post as a guest

Earn Coins

Add Answer to:
Background The Blue River runs beneath Old Bridge, which is 5 m above the river bed (the gap between the bed and the lowest points of the bridge construction is 5 m). The river has uniform and trapez...