Deep basement excavations
Multi-level basements on constrained urban plots where props would obstruct the works.
Tie Back Anchoring Work in UAE
Tie back anchoring work in the UAE holds a shoring wall from behind, transferring load into competent ground beyond the failure wedge so that a deep excavation can be opened with no props across it.
Tie Back Anchoring Work in UAE quick facts
Tie Back Anchoring Work in UAE — quick facts
| Service | Tie-back ground anchors for retaining deep excavations |
|---|---|
| Arrangements | Single layer and multiple layer |
| Installation | Drilled on rake, tendon placed, grouted, stressed to design load |
| Tendon | PC strand wire, ASTM A416/A416M-98 Grade 270, 15.24 mm |
| Anchor heads | 3 to 16 hole, 60 mm thick |
| Proof testing | Load cell 0–10 000 kN with digital indicator |
| Areas served | All seven emirates |
Overview
What a tie-back anchor does
A tie-back anchor is a steel tendon installed at an angle behind a retaining wall and bonded into competent ground past the soil's failure wedge. Once grouted and stressed, it holds the wall against the pressure of the retained ground.
Apex installs ground anchors at a prescribed angle to the horizontal using an anchoring machine — drilling to the specified depth, placing the anchor, grouting, and subsequent stressing up to the designed limit. Anchors are installed in single layers or in multiple layers as the excavation advances downward.
The advantage over internal propping is simple: the load goes backwards into the ground instead of across the hole. The excavation stays clear, plant moves freely and the substructure is built without working around struts.
Every anchor is proof loaded before it is relied upon, with readings taken through a load cell and digital indicator. Where the design requires monitoring during excavation, load cells are left in place.
Applications
Where it is used
Shoring wall support
Contiguous pile, secant pile, diaphragm and sheet pile walls needing lateral restraint.
Retaining structures
Permanent and temporary retaining walls transferring load into ground behind the structure.
Questions
Tie Back Anchoring Work in UAE — questions answered
What is tie back anchoring?
Tie back anchoring installs steel tendons at an angle behind a retaining or shoring wall, bonded by grout into competent ground beyond the soil's failure wedge. Stressing the tendon holds the wall back against the retained ground, which allows a deep excavation to be opened without internal propping.
How are ground anchors installed?
Apex drills the anchor hole on rake to the specified depth using an anchoring machine, places the strand tendon with the free length sheathed, grouts the bond length, and once the grout has gained strength stresses the anchor against the anchor head and locks it off at design load.
What is the difference between single layer and multiple layer anchors?
A single layer is one row of anchors, suitable where the retained height is modest. Multiple layers install successive rows as the excavation is taken down, each row picking up the additional load as the retained height grows.
Can anchors extend under a neighbouring plot?
Frequently they must, because the bond length has to reach beyond the failure wedge. That requires agreement from the adjoining landowner and the relevant authority, and it needs resolving at design stage — on a tight urban plot it can decide whether anchoring is viable at all.
Are the anchors removed afterwards?
Temporary anchors are de-stressed once the permanent structure can carry the load, though the tendon itself normally stays in the ground. Permanent anchors remain in service and require additional corrosion protection to the tendon.
Enquiry
Get an anchoring price
Send the shoring layout, retained height and the anchor loads from your designer, and we will come back with a method and a price.
- Prefer to talk
- +971 4 320 4120
- apex@eim.ae
Reach us directly
Call, WhatsApp or email — all three reach the same team, and we reply within one working day.
Call +971 4 320 4120WhatsApp +971 55 221 9418Email apex@eim.aeSite owner: set NEXT_PUBLIC_FORM_KEY to enable the enquiry form.