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Micro Piles  |  Pressure Grouting  |  Rock Anchors  |  Permeation Grouting
Soil Nailing  |  Compaction Grouting  |  Micropiles  |  Injection Grouting  | 
Chemical Grouting

Our techniques apply when adding new structures: especially rock anchor, microfine cement, soil nailing, micropile installations for foundation support. We specialize in slope stabilization, anchors, permeation grouting, foundation repair and support, grouting, soil nails, rock drilling, micropile installations, and sinkholes. We use a problem-solving approach geotechnical architecture of buildings, bridges, water plants, sewage plants, tunnels, sinkholes, caisson, shoring, underpinning, agriculture, and roads construction. We are experienced in these applications: micro piles, sinkhole repair, permeation grouting, pressure grout, soil nails, chemical grouting, micropiles, compaction grout, and rock anchors. Our specialties are rock anchor, acrylamide and compaction grouting, mini piles, sinkhole repair, micropiles, acrylamide grouting, and soil nailing. We will continue to dedicate ourselves to excellence, including insurance mortgage, in our performance, in our integrity, and in our relationships with our customers. We will carefully weigh our decisions, actions, and results to make sure that we remain the most trusted name in the geotechnical contracting industry. Please visit our website http://www.rembco.com/. Add Concrete Construction URL

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1
1
CHAPTER
JULY
1997
11-1
Tiebacks
Tiebacks are used in both temporary and permanent structures. The use of tiebacks with
sheet pile or soldier beam shoring permits higher walls and deeper excavations than are
possible with cantilever type construction—up to 35 feet or so versus 15 feet for cantilever
construction. Walls higher than 35 feet can be built by using high strength sheet pile or
soldier beams with additional tiers of tiebacks.
Components
A tieback consists of the following components as shown in Figure 11-1:
COMPONENT
DESCRIPTION
Bond Length The portion of prestressing steel fixed in the primary grout bulb through which load is
transferred to the surrounding soil or rock. Also known as the anchor zone.
Unbonded Length The portion of the prestressing steel which is free to elongate elastically and transmit the
resisting force from the bond length to the wall face.
Prestressing Steel –
Support Member
This transfers load from the wall reaction to the anchor zone and is generally a prestress
rod or strand.
Anchorage This consists of a plate and anchor head or threaded nut and permits stressing and lock-
off of the prestressing steel.
Grout
This provides corrosion protection as well as the medium to transfer load from the
prestressing steel to the soil or rock.
Tiebacks, Tiedowns,
and Soil Nails