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Compaction Grouting:
Compaction Grouting is a soil correction pressure system which increases the bearing capacity of soils. A compaction application is accomplished by pumping a very viscous (low mobility) grout, under pressure, into the ground which compacts the surrounding soil. Expanding grout displaces the under compacted soil to the side, forming a grout column. Grout columns can be sized as needed depending on the soil characteristics.
Displacement in the soil is produced by overburden pressure pushing back against all sides of the compaction grout column. A major advantage of using compaction grouting is that its top peak effect is realized in the weakest or softest strata of the soils underlying a building.
Compaction Grouting Applications:
Usually, grout (cement) is applied in measured stages beginning at the lowest point of a drilled shaft then working upward through the weak ground. On very shallow pressure grouting applications, compaction grouting can be injected from top down, building a cap. The “Top Down” method densifies the upper portions of treated area first so that it becomes a dense cap which helps to contain the expanding grout at lower levels.
When applied in a grid style layout, the pressure treated soil has a greater uniformity throughout its entire mass; this gives maximum soil stabilization and provides solid support.
Significant improvement can be achieved on the load-bearing capacity of problem soil. A lift can be achieved on structures that have settled due to problem soils.
Typical Grouting Sequence
Compaction grouting can be used as either end bearing or skin friction bases for lifting or stabilizing soils.
Compaction Grouting is a soil correction pressure system which increases the bearing capacity of soils. A compaction application is accomplished by pumping a very viscous (low mobility) grout, under pressure, into the ground which compacts the surrounding soil. Expanding grout displaces the under compacted soil to the side, forming a grout column. Grout columns can be sized as needed depending on the soil characteristics.
Displacement in the soil is produced by overburden pressure pushing back against all sides of the compaction grout column. A major advantage of using compaction grouting is that its top peak effect is realized in the weakest or softest strata of the soils underlying a building.
Compaction Grouting Applications:
- Pre-construction soil remediation
- Lifting structure approaches
- Raising: Roads, Bridges (pictured), Towers
- Raising and stabilizing existing structures
- Filling fissures in rock and subsurface voids
- Sinkhole remediation
Usually, grout (cement) is applied in measured stages beginning at the lowest point of a drilled shaft then working upward through the weak ground. On very shallow pressure grouting applications, compaction grouting can be injected from top down, building a cap. The “Top Down” method densifies the upper portions of treated area first so that it becomes a dense cap which helps to contain the expanding grout at lower levels.
When applied in a grid style layout, the pressure treated soil has a greater uniformity throughout its entire mass; this gives maximum soil stabilization and provides solid support.
Significant improvement can be achieved on the load-bearing capacity of problem soil. A lift can be achieved on structures that have settled due to problem soils.
Typical Grouting Sequence
Compaction grouting can be used as either end bearing or skin friction bases for lifting or stabilizing soils.
- Core through footing extensions, concrete slab, asphalt, or other obstruction.
- Drive casing into the soil stratum continuing down to bedrock or proper friction depth.
- A low mobility, mortar-like cementitious mixture (grout), less than two inch (2”) slump having more than 3,000 psi compressive strength, is pumped at pressures up to 1,000 psi contained within the casing to form a cohesive concrete bulb.
- The grout bulb is expanded to a one-foot diameter. Displacement of soil at the lower tip of casing is calculated and measured; the volume of grout is steadily maintained.
- The pressure grouting tube is raised one foot “lift”, and the grouting process is repeated.
- Injections continue as the casing is withdrawn up to the structure's footing, which creates an in-place solidified grout pile surrounded by intensely compacted soil.
Mud Jacking
Mud Jacking, also referred to as slab-jacking or concrete leveling, is used to correct settlement issues in interior and exterior concrete slabs, such as driveways, sidewalks, and porches. If your concrete is sinking there is a very good possibility that the concrete slab was installed on poorly compacted fill dirt. Often Sub-surface erosion and shrinking soils are the culprits.
The mud-jacking process includes drilling a 1 ¾” hole through the concrete, and injecting a low-strength cement mixture under the slab, consolidating the problem soil, filling all voids and then raising the slab.
Mud jacking has been a common repair throughout the upper Midwest for many years. The concept is simple, but should only be attempted by professionals. Mud jacking requires experience and specialized equipment to do the work properly.
There are numerous benefits to mud-jacking:
Pictorial overview of Slab Jacking
Mud Jacking, also referred to as slab-jacking or concrete leveling, is used to correct settlement issues in interior and exterior concrete slabs, such as driveways, sidewalks, and porches. If your concrete is sinking there is a very good possibility that the concrete slab was installed on poorly compacted fill dirt. Often Sub-surface erosion and shrinking soils are the culprits.
The mud-jacking process includes drilling a 1 ¾” hole through the concrete, and injecting a low-strength cement mixture under the slab, consolidating the problem soil, filling all voids and then raising the slab.
Mud jacking has been a common repair throughout the upper Midwest for many years. The concept is simple, but should only be attempted by professionals. Mud jacking requires experience and specialized equipment to do the work properly.
There are numerous benefits to mud-jacking:
- Mud-jacking is a GREEN repair as it reduces concrete that has to go to landfills
- It can be done in virtually any weather. The material injected beneath the slab provides a strong base.
- Little or no disruption to landscaping.
- Nothing needs to be moved off the slab, as the pump can lift the weight of the slab and anything you have placed on it.
Pictorial overview of Slab Jacking
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| A pattern of 1-5/8 inch holes are drilled through the sunken slab. | A grout mixture is pumped under the slab with our specialized equipment. Once any void is filled, the grout becomes pressurized, hydraulically raising the slab to the desired height. | The holes are patched using a concrete mixture. |
Mud-jacking Before and After Photos
| Before | After |
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Another Method Of Mud-Jacking
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