Shoring Contractors in Dubai

Secant and contiguous pile walls involve the construction of reinforced and unreinforced piles which may or may not overlap each other to form a shoring wall. This wall can be further supported by ground anchors or internal struts.

The process starts with the construction of a guide beam which sets the template for the piles. This is followed by the construction of unreinforced piles with a gap in between for the construction of reinforced pile later. The reinforced pile is drilled between two unreinforced piles thus creating an overlapping wall of piles with and without reinforcement. Secant pile wall is best suited for soil profile where water level is high or if there are surcharge loads on active sides of the shoring.

Another pile wall system for shoring is contiguous piles which is a wall of reinforced piles closely spaced but not overlapping. Contiguous piles are suitable for soils where water table is not high or is lowered through proper dewatering.

Both systems are further reinforced by the construction of a capping beam connecting them all through one monolithic reinforced concrete beam. Secant and contiguous pile walls also have ground anchors and struts to give them lateral support.

Sheet piles are prefabricated interlocking steel sheets which are driven in the soil for support low to medium height excavation. Ideal for places where the shoring has space constraint. Anchors can also be provided with sheet piles to provide lateral support if required. Sheet piles are usually inserted by vibratory hammer. In dense or hard soils the insertion of these sheet piles can be a slow process but high frequency vibratory hammers can be useful in such soils. Sheet piles are reusable and can be extracted after the construction proceeds beyond the basement construction.

Steel sheet piling has several advantages over other materials:
1. Provides high resistance to driving stresses due to its shape and material.
2. Sheet piles are light weight, thus easy to handle
3. Sheet piles can be reused on several projects.
4. Sheet piles have long service life above or below water with modest protection.
5. Sheet pile lengths can be easily increased by either welding or bolting

Soldier piles are I or h beams which are also driven in the soil to have concrete panels or timber planks placed between them to prevent the soil from caving inside the excavation.

Soldier pile and lagging walls are the most inexpensive systems compared to other retaining walls. They are also very easy and fast to construct. The major advantages of soldier pile walls are:

1. Soldier piles take very less time to install.
2. Soldier pile system is a cheaper excavation support system as compared to other conventional methods.
3. Soldier piles can be very useful in areas where service lines are present and can be easily adjusted to repair or move the service lines.
4. Timber or concrete panel lagging can be cheap and fast.
5. Construction of soldier pile and lagging walls does not require very advanced construction techniques.

Cased CFA piles is a state of the art method for pile installation.

It requires the use of heavy duty large piling rigs with high torque capacities. The method requires the use of two rotary heads driving a heavy duty hollow-stem CFA auger in a clockwise direction into the top soil while at the same time rotating a casing in anticlockwise direction such that the toe of the auger and the bottom of the casing are at about the same level during the advancement of the drilling process. Upon reaching the design pile depth and in a manner identical to CFA piles, the concrete is pumped through the CFA auger but this time constrained by the full length casing. This helps maintain a perfectly circular pile shaft with a very tight control on verticality

Diaphragm walls are cast-in-situ reinforced concrete walls formed to retain the sides of deep excavation. Diaphragm walls are constructed using state of the art cutters usually suspended from heavy-duty cranes. The thickness and the depth of diaphragm walls are usually design dependant. Our in-house geotechnical design engineers determine the thickness, depth of the wall, level of anchors as well as the amount of reinforcement the wall needs for stability of the designed excavation.

Diaphragm walls are considered to be the most ‘watertight’ type of retaining wall structures. They usually form the external walls of structures such as underground car parks etc. IRBC possesses four diaphragm wall units in the form of 3 cutters (Bauer BC32 and BC40 units) and a Leffer hydraulic grab.

Struts are bracing pipes or steel beams that act to prop the internal sides of an excavation.

Struts are bracing pipes or steel beams that act to prop the internal sides of an excavation. They are usually used in combination with anchors to provide tie-back systems of deep excavations. Struts are generally used when then installation of anchors are not possible due to their potential interference with service corridors or with the foundations of adjacent structures.

Anchors are inclined tie-backs that act to provide pulling forces to assist earth retaining structures with a reaction force away from the excavation side.  Anchors enable the construction of deeper excavation and sometimes multiple layered anchors are needed to support deeper excavations.

Anchors are grouted elements produced in the subsoil by injecting grouting mortar around the rear part of a steel tendon. The grout body is connected via the steel tendon and the anchor head to the structure or the rock section to be anchored.