SOLVE USING EXCEL

A geotech engineer is designing a gabion wall to protect a highway from falling debris.

A gabion wall is a wire-mesh container filled with rocks.

The width of the wall will be 6 feet and the cross section is shown below.

What volume of rock will be needed to fill the container?

Distance

Height

Top

40

10

10

80

5

10

120

3

10

160

0

10

200

2

10

260

10

10

a.) A geotechnical engineer is planning to use a gabion retaining wall to protect a section of highway from debris and mud. A gabion is a wire-mesh container filled with rocks. The engineer must estimate the volume of rock required. The gabion wall has a width of 6 feet, and the cross-sectional area of the retaining wall is shown below. Use the trapezoidal rule to find the volume. Top of Structure 6 0 40 80 120 160 200 240 280 x, Distance (ft) b.) Environmental engineers are concerned with the environmental effects of sediment in streams and rivers. Measurements of sediment transport rates are made during flood runoff events. Large volumes of sediment in runoff to reservoirs can reduce the storage volume of reservoirs as well as reduce the quality of water for fish and wildlife. At a particular location, the following 6-hour measurements ot the sediment rate (4) were made auring a storm event: U, , l,23,28, 20, 41, 15, 14, 11, 6, 2,2 pounds/sec. Each measurement is assumed to reflect the average rate over the 6 hour period. Find the total sediment load (pounds) during the storm using Simpson's rule. At a specific weight of 165 lb/ft3, what is the volume of sediment? How thick would be the depth of sediment if the bottom area is 25 acres