Our specialty is shallow geotechnical work to prevent and correct settlement. More specifically, we are plural component geotechnical polyurethane and cellular concrete application experts. However, sometimes shallow repairs aren’t most appropriate, and in those cases, we also install helical piles and resistance piers for deep foundations.
Shallow Foundation Solutions
We are known for our polyurethane grouting expertise when it comes to stabilizing and correcting settlement of slab foundations. From small sections of settled warehouse floors and compressor bases to distribution centers and big box retailers, we employ polyurethane grouting to raise settled slab foundation elements with minimal disruption to operations, and only nominal addition of loading to underlying soils. Polyurethane grouting may be used in place of traditional
On the settlement prevention side, we install lightweight fills to reduce loads on underlying soils to help prevent future settlement. Geotechnical polyurethane and cellular concrete are two lightweight fill materials we install, and can be used for load balancing applications, and for deep fills over sensitive structures.
We use single component polyurethanes to for soil modification to increase the bearing capacity and stability of non-cohesive soils. Permeation grouting using polyurethane resin grouts to greatly increase the bearing capacity of soils is a common way to help stabilize foundation elements which are moving but would be impractical to address using more intensive repairs such as helical piles or resistance piers. Permeation grouting using expanding pre-polymers can be used to reduce water movement through soils, and therefore increase bearing capacity, and also to improve stability of soils by filling voids within the soils.
Deep Foundation Solutions
We install two types of deep foundations; helical piles & resistance piers. Helical piles are an excellent choice for new foundation repair and settlement correction of lightly-loaded structures, and for installation prior to construction to prevent settlement. We use resistance piers for applications where movement during installation is tolerable, and where equipment required to achieve crowd during helical pile installation can’t get to the repair location.
Helical piles may be installed for either new construction for settlement prevention, or for foundation repair applications to stop and or correct settlement. Helical piles are screwed into the ground to a layer of harder soil, and then attached to the footing. The load is then transferred from the footing to the pier, which results in the deeper, stronger layers of soil carrying the structure’s weight, bypassing weaker, shallower layers. Helical piles may also be installed as part of new construction, with the pile caps being encapsulated in the footings.
Resistance piers are pushed into the ground using the mass of the structure as resistance. They don’t work too well in lightly-loaded structures, or where footings have broken an deteriorated, as they cause the structure to flex during installation. Resistance piers are generally easier to install in tight spaces than helical piles.