Foundation Raising
LINCOLN COMPANY ADDRESSES THE CAUSES FOR FOUNDATION SETTLEMENT, NOT THE SYMPTOMS. SETTLED AND SINKING FOUNDATIONS ARE STABILIZED AND RAISED USING PROVEN SOIL GROUTING TECHNIQUES RATHER THAN PIERS OR PILES.
- STABILIZE FOUNDATION
- CAUSES FOR STRUCTURE SETTLEMENT
- FOUNDATION RAISING
- SINKING FOUNDATION
- FOUNDATION REPAIRS
RESIDENTIAL, COMMERICAL, INDUSTRIAL, HISTORICAL
Applications:
- Stone Foundation Raising
- Masonry Block Foundation Raising
- Concrete Foundation Raising
Compaction Grouting was developed as a corrective measure to address the causes for structure or foundation settlement versus the symptoms.
In most grouting applications, 100% of the repairs are performed from the exterior and completed grouting operations are undetectable within hours and a typical project's duration is one to three days.
Finally, Compaction Grouting does not require excavation, whereas piles and piers require excavation and/or the removal of portions of the footing, driveways, sidewalks, patios, decks or landscaping increasing costs, disruption and project duration.
The Process...
Compaction Grouting, is performed by injecting a low mobility, stiff cement grout into the ground beneath a settling foundation in order to densify, or compact the supporting soil beneath. Densifying soil increases its bearing capacity or its ability to support a structure or sinking foundation. Injection is done to a depth where stable soil is found, at times far beneath the foundation or structure. Injecting a “bulb” of stiff grout into the ground displaces and densifies soil and pushes it upward in a controlled manner. High pumping pressure of over 1,000 p.s.i. is used and carefully regulated to first stabilize and then, if desired, raise the foundation or structure in a controlled manner. The procedure densifies weak soil, fills voids and drives out perched water, stabilizing the foundation.
Steel injection pipes are inserted to the bottom of the zone to be stabilized, or to a depth of refusal below the foundation to be stabilized or raised. Pipes are either drilled or driven into place. The pipes are then retracted a few inches to open the end of the injection pipe and allow a low volume, high pressure pump to inject the stiff grout. As the grout expands in a homogeneous bulb, radial forces exerted displace and thus compact the surrounding soils. Slow injection prevents soil fracturing and allows water to dissipate as the structure is gradually lifted uniformly.
Foundations are designed to be uniformly supported by soil. Compaction grouting maintains this contact between foundation and soil as intended and without changing the design function of the structure. Jacking a structure with pilings or piers causes point loading of the foundation, a situation for which it is not designed, often resulting in foundation cracking. Also, as a foundation is raised using point loading devices, voids are created under the foundation that later must be filled. Failure to completely fill the voids will allow water to accumulate in these voids, potentially compromising unsupported areas. Precautionary steps must be taken when filling such voids the thin viscous grout required to fill voids does not infiltrate the foundations de-watering drain tiles.
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