Eng. Malek Abuwarda Lecture 5 P1P1 Construction Methods Lecture 5 Excavating and Lifting.

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Presentation transcript:

Eng. Malek Abuwarda Lecture 5 P1P1 Construction Methods Lecture 5 Excavating and Lifting

Eng. Malek Abuwarda Excavating and Lifting  Trenching Machines and Plows  The figure shows a large chain trencher capable of digging m wide vertical-sided trenches to a depth of 3.1 m.  Ladder trenchers are similar to chain trenchers but are larger. They are capable of digging trenches up to 3.1 m wide and 7.6m deep.  Bucket wheel trenchers use a revolving bucket wheel to cut a trench up to 1.5 m wide and 2.7 m deep. Lecture 5 P2P2

Eng. Malek Abuwarda Excavating and Lifting  Trenchless Technology  Pipe jacking Lecture 5 P3P3

Eng. Malek Abuwarda Excavating and Lifting  Trenchless Technology  Horizontal earth boring Lecture 5 P4P4

Eng. Malek Abuwarda Excavating and Lifting  Trenchless Technology  Microtunneling or utility tunneling  Repair and Rehabilitation of Pipelines  The relining of a pipeline  Pipe bursting Lecture 5 P5P5

Eng. Malek Abuwarda Excavating and Lifting  Cranes  Cranes are primarily used for lifting, lowering, and transporting loads.  They move loads horizontally by swinging or traveling. Lecture 5 P6P6

Eng. Malek Abuwarda Excavating and Lifting  Cranes  The mobile telescoping boom crane shown is capable of lifting loads to the top of a 24-story building.  The major factor controlling the load that may be safely lifted by a crane is its operating radius  Some of the other factors influencing a crane's safe lifting capacity include the position of the boom in relation to the carrier, whether or not outriggers (beams that widen the effective base of a crane) are used, the amount of counterweight, and the condition of the supporting surface. Lecture 5 P7P7

Eng. Malek Abuwarda Excavating and Lifting  Cranes  Safety regulations limit maximum crane load to a percentage of the tipping load.  Crane manufacturers provide charts giving the safe load capacity of the machine under various conditions. Lecture 5 P8P8

Eng. Malek Abuwarda Excavating and Lifting  Cranes Lecture 5 P9P9

Eng. Malek Abuwarda Excavating and Lifting  Heavy Lift Cranes  The crane shown has a maximum lifting capacity of 209 t and a maximum lifting height of m. Lecture 5 P10

Eng. Malek Abuwarda Excavating and Lifting  Tower Cranes  The tower crane is widely used on building construction projects because of its wide operating radius and almost unlimited height capability.  Major types of tower cranes include horizontal jib (or saddle jib) cranes, luffing boom cranes, and articulated jib cranes  The majority of tower cranes are of the horizontal jib type Lecture 5 P11

Eng. Malek Abuwarda Excavating and Lifting  Tower Cranes  The majority of tower cranes are of the horizontal jib type.  However, luffing boom (inclined boom) models have the ability to operate in areas of restricted horizontal clearance not suitable for horizontal jib cranes with their fixed jibs and counterweights. Lecture 5 P12

Eng. Malek Abuwarda Excavating and Lifting Lecture 5 P13

Eng. Malek Abuwarda Excavating and Lifting Lecture 5 P14