Use of soil nails to reinforce existing ground - Sinorock is the pioneer

03/ago/2016 11:23:45 sinorocksoilnailing Contatta l'autore

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Sinorock  has been a pioneer in the use of soil nails to reinforce existing ground.

Today, Sinorock is widely recognised as the prinicipal worldwide source for soil nails meeting the most demanding performance requirements.

Sinorock soil nails allow the economic stabilisation of sliding slopes, excavations and tieback walls. They are well suited in granular soils with sufficient internal friction, so that an effective load transfer along the soil nail is possible, and only slight creep movements occur in the supported soil mass. The soil nails are installed as the excavation progresses from top to bottom. The surface of the cut is usually stabilised by shotcrete and

mesh mats.

Soil nails are loaded only by ground movement. The anchoring length of

the soil nails must extend into stable ground beyond the failure surface.

Advantages of Soil Nail walls

n Top-down construction

n Light construction equipment.

Advantages of DYWIDAG Soil Nails

n Can be used for temporary and

permanent applications

n Simple components and component

assembly

n Easy to install and test

n Durable continuous threads. Allow

splicing at any point along the length

n Low corrodibility through robust

reinforcing steel quality

n Angle compensation up to 15°

through domed nuts and plates.

Requirements for the site

n Stable, self-supporting soils at the excavation face

n Benches strong enough to support drilling equipment.

Requirements for the Soil Nail System

n High tensile and shear strength

n High ductility

n High bond strength

n Ability to accommodate structural

and non-structural face attachments.

Design Considerations

n Design life (permanent or

temporary wall)

n Corrosion protection

n Pullout resistance between nail

and the ground

n Individual nail capacity

n Length of nail to reach beyond the

failure surface

n Nail spacing (typically 1-1.5m)

n Nail inclination (typically 5°-15°)

n Wall inclination

n Stability analysis for each stage of

construction

n Allowable horizontal and vertical

displacement limits

n Dewatering, if below the ground

water table

n Drainage system.

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