Learn free Civil Engineering by Civilustaad about PUSHING” AND “SHOVING” ARE DEFORMATIONS OF THE PAVEMENT SURFACE

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PUSHING” AND “SHOVING” ARE DEFORMATIONS OF THE PAVEMENT SURFACE

Pushing” and “Shoving” are deformations of the pavement exterior. They are most frequent in intersections, where there is braking and stopping traffic. It is easiest to identify at intersections where transverse striping becomes “wavy”.

“Delamination” is sections of a surface layer that have come free from the pavement.

Cause: 
Unstable Mix

Poor interlayer bond

Poor construction

Braking, stopping, accelerating traffic

Slippage between layers

Poor interlayer bond

Heavy trucks

Moisture damage

Poor construction

Solutions - Prevention: 

The use of quality design, quality liquid asphalt, quality aggregate, and quality construction
Elastomeric polymer modified binders have been found to be especially effective.

A good tack between layers

Learn free Civil Engineering by Civilustaad about POROUS ASPHALT

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POROUS ASPHALT

Porous asphalt is pervious asphalt that allows water to penetrate into an underground storm water management capacity. This will let the water to perk into the ground naturally. This video takes you through the whole process for installing this storm water management system.

Learn free Civil Engineering by Civilustaad about OREGON INLET IS AN INLET ALONG NORTH CAROLINA'S OUTER BANKS

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OREGON INLET IS AN INLET ALONG NORTH CAROLINA'S OUTER BANKS

Oregon Inlet is an inlet along North Carolina's Outer Banks. It joins the Pamlico Sound with the Atlantic Ocean and separates Bodie Island from Pea Island, which are linked by a 2.5 mile bridge that spans the inlet. 

 As one of the little access points to the ocean along this stretch of coast, Oregon Inlet is a chief departure point for charter fishing trips, with a close by harbor serving as the base for many large boats that travel miles out towards the Gulf Stream almost every day. 

The area is too home to a U.S. Coast Guard station.

Learn Free Civil Engineering by Civilustaad about SOIL STABILIZATION

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SOIL STABILIZATION

EFFECTIVE SOLUTION

EnviroGrid provides a straight, cost-effective solution. The high-strength cell walls sustain the shape and integrity of the structure, allowing for heavy equivalent axle loads exclusive of fear of lateral movement of the fill material. The cellular design of EnviroGrid also distributes the loads to an unmitigated area, thus reducing the stress to the grid itself as well as to the sub-grade below.

 The thickness of the overall framework and sub-base can be decreased with equivalent or greater structural integrity. 

Using EnviroGrid too allows for lower quality aggregates found locally, eliminating the need to import better or extra material. 

Compact sections of EnviroGrid filled with sandy soil can thus return truckloads of crushed stone or other granular fill or even asphalt or concrete. EnviroGrid EGA20 can be used for every soil stabilization applications.

The large number of cells per square meter allows for improved resistance to specific area failure when used for specific load support situations. 

The added cell wall area is perfect in severe slope erosion control purposes by competently preventing the removal of soil particles and prohibiting the creation of rills and gullies. 

EnviroGrid EGA20 is too used in more specialized earth retention jobs.

Learn free Civil Engineering by Civilustaad about SOIL STRUCTURE INTERACTION

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SOIL STRUCTURE INTERACTION

The majority of the civil engineering structures involve a few type of structural element with direct contact with ground. When the exterior forces, such as earthquakes, proceed on these systems, neither the structural displacements nor the ground displacements, are independent of each other. 

The procedure in which the response of the soil influences the motion of the structure and the movement of the structure influences the response of the soil is termed as soil-structure interaction (SSI).

Conventional structural design methods overlook the SSI effects. 

 Neglecting SSI is rational for light structures in relatively stiff soil such as low rise buildings and simple rigid retaining walls. 

The effect of SSI, however, becomes prominent for heavy structures resting on comparatively soft soils for example nuclear power plants, high-rise buildings and elevated-highways on soft soil.