Geotech Construction Methods Overview

As a trusted ground improvement contractor and a geotech construction company in Florida, Helicon specializes in using the latest technology to design and construct deep foundation and ground improvement solutions for your commercial property.

Helicon offers proven client-focused business practices, high standards of quality and safety, and a variety of construction services customized for the success of each project. As a trusted ally, we are able to educate our clients on all their ground improvement and deep foundation solutions. There are typically multiple geotechnical solutions, each come with different features and benefits, when looking to find a solution. Take a look at the solutions that Helicon offers.


Helicon Geotech Construction Methods

Deep Foundation Methods

  • Helicon Piles
  • Micropiles
  • Push Piers
  • Displacement Piles
  • Drilled Shafts

Earth Retention & Shoring methods

  • Tie Back Systems

Ground Improvement Methods

  • Vibro Solutions
    • Vibro Compaction
    • Vibro Stone Columns
  • Grouting Solutions
    • Compaction Grouting
    • Polyurethane Grouting
    • Permeation Grouting
 

Ground Improvement Geotech Construction Methods

Ground Improvement is the process of altering the physical properties in soil to improve the load bearing capacity. Soil stabilization companies work with your soil to increase the strength and control the shrink-swell capacity. By stabilizing your soil, you can ensure a safe foundation for your commercial property.

At Helicon, we use the safest and most accurate ground improvement methods to densify loose soils. The process and methods used can vary based on the type of soils and additives that are needed. From sandy or gravelly to silts and clays, we ensure the correct additives are used so the best mixture is created for your project.

Vibro Methods

Vibro Compaction

Vibe Stone Columns

Grouting Methods

Compaction Grouting

Polyurethane Grouting

Permeation Grouting


Vibro Compaction

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Helicon's vibro compaction solution uses vibration to compact weak soils. A vibrator hung from a crane is used to dig into the ground, often with the help of high pressured water jets.

Our commercial geotech construction team will know if this is the best method to densify your soil. Vibro compaction is mostly used on grainy or loose soils that tend to be more difficult to build on. A high-powered vibrating machine is rigged to a crane and lowered into the earth. The vibrations and water jets allow the machine to move easier.  

Once the predetermined depth is reached, sand infill or another material is added in piles on the surface. The machine’s vibrations move the infill down into the ground in various increments so the soil below can be compacted properly. The machine then moves up in lifts, and this process is repeated until the soil below has been treated.

We ensure that the soil is compacted both above and below the water table.

At Helicon, we provide the most cost-effective and technically appropriate solution for your project’s needs. Every vibro compaction project completed by Helicon comes with a Firm Foundation Warranty.

Vibro Compaction Common Uses

  • Increase bearing capacity
  • Decrease settlement
  • Mitigate liquefaction

vibro compaction Advantages

  • Great for shallow foundations
  • Increases compaction and density
  • Reduces saturation

Vibro Stone Columns

Helicon's vibro stone columns (or vibro-replacement) are a ground improvement technique particularly suitable to increase the density of granular soils and reinforce cohesive soils.

Making sure the ground can support a structure is a team effort that requires equal parts communication and expertise among all parties involved. Helicon has completed ground improvement solutions at hundreds of sites in Florida, building trusted relationships and a bank of knowledge unrivaled in the industry.

Installing vibro stone column often times dramatically strengthens weak soils at a lower cost than either building deep foundations or replacing weak soils with engineered fill.  We provide the most cost-effective and technically appropriate solution for your project’s needs. Every vibro stone columns project completed by Helicon comes with a Firm Foundation Warranty.

vibro stone column Advantages 

  • Loose sand and silt sites with high ground water.
  • Liquefiable and loose sand sites with seismic settlement.
  • Sites that require gravel drains.
  • Sites where vibratory ground improvement will be effective.
  • Contaminated sites.
  • Fill sites with high ground water.

Vibro Stone Column Common Uses

  • Increase bearing capacity
  • Decrease settlement
  • Mitigate liquefaction

Compaction Grouting

Helicon's compaction grouting method of soil stabilization caps and seals the limestone’s surface, fills voids and pushes into the loose, weak soil, compacting and strengthening it. Grout injection pipes are drilled at various angles with specially designed compact equipment.

After the injection pipes are installed, the grout is injected under high pressure. Structural movement and grout line pressures are monitored throughout the pumping process. Upon completion, all pipes are raised and removed.

The grout compound does not mix with the soil; it pushes into the soil particles, strengthening the loose, weak soil, and filling any voids. However, because of the liquid nature of the grout solution, it can completely fill every void in the bedrock, solidly compacting into joints, fissures, cracks, and other potentially dangerous areas. As the solution totally fills the void and hardens, it seals the limestone surface, creating a firm cap that is impermeable to water. Every compaction grouting project completed by Helicon comes with a Firm Foundation Warranty.

compaction grouting Advantages 

  • Improves the bearing capacity of weak soils.
  • Irregular fills or varying native soils become more uniform.
  • Minimal disturbance to landscape, floors, roads or nearby structures.
  • Inexpensive and rapid compared to other soil stabilization techniques.
  • Excellent control with the utilization of laser controlled monitoring equipment

compaction grouting Common Uses 

  • Reduce liquefaction potential
  • Decrease settlement
  • Increase bearing capacity
  • Stabilize sinkholes or reduce sinkhole potential

Polyurethane Grouting

Polyurethane grout is a re-leveling technique Helicon uses a unique type of polyurethane mixture and injects it into the soil to fill voids and level slabs or foundations. The polyurethane grout expands to fill the crack or joint.

Polyurethane grout can be single or multi-component and can be made of various materials allowing for variations in reaction time, expansion properties, flexibility, viscosity, and reaction with water. The process begins with drilling a hole at a predetermined location. A geotechnical professional will then use a hand pump to inject the polyurethane grout at low pressures. Once the grout is injected, it will expand and cause surrounding soil to move and fill gaps or re-level the slab.

At Helicon, we provide the most cost-effective and technically appropriate solution for your project’s needs. Every Polyurethane Grout project completed by Helicon comes with a Firm Foundation Warranty.

Polyurethane Grouting Advantages

  • Introduce grout into soil pores without any essential change in the original soil volume and structure.
  •  Ability to be less disruptive and enable tunneling to proceed without over-excavation.

Polyurethane Grouting common Uses

  • Fill voids.
  • Re-level slabs.
  • Seal cracks and joints.
  • Strengthen subsoil.
  • Anchor retaining walls.

Permeation Grouting

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Helicon's permeation grouting system is a low pressure injection system used to improve the strength and reduce the permeability of granular soils. Our permeation grouting process helps strengthen sands and gravels, and repairs structural formations. The process produces a solidified mass to support increased load and fill voids in the soil.

Most often Helicon’s permeation grouting experts apply this technology when excavation is required adjacent to a building or other structure that is set on non-cohesive foundation soil or other unstable ground.

An effective permeation grouting program also requires a contractor with technical expertise to implement the project. Helicon has been performing permeation grouting programs for more than 10 years. Helicon uses pressure grout methods for preventing water flow, stabilizing granular material, encapsulating contaminated material, and improving the physical properties of soil or rock. We have also effectively used permeation methods to fill voids, cracks, fractures, cavities, and to create barriers to the movement of liquids through the ground

 

permeation grouting Advantages

  • Relatively economical.
  • Time-efficient.
  • Leaves a clean and undisturbed site.
  • Environmentally inert.

Permeation Grouting Common Uses

  • Create barriers to groundwater flow
  • Underpin foundations
  • Provide excavation support
  • Stabilize soils for tunneling

Deep Foundation Construction Methods

Deep foundation construction allows structural elements to reach underlying soils or rock, while bypassing loose or weak soils, and provide better structural support. Helicon's deep foundation construction team can work prior to the building of a structure as a pre-construction system, or as underpinning for existing buildings. The process essentially includes drilling deep into the ground at specific points as determined by your assigned Project Manager. Then, our expertly trained team of geotechnical workers use the proper materials and methods to grout or fill the hole with reinforced concrete.

Pier & Pile Methods 

Helical Piles

Micro Piles

Push Piers

Displacement Pile & Shaft Methods

Displacement Piles

Drilled Shafts


Helical Piles

Helical pile are an excellent choice for stabilizing existing structures that have been damaged due to settlement in the right conditions. The soil around your foundation must be excavated to expose the footing at each pier location. A section of your slab floor will need to be removed to expose the footing if it is an inside project. The slab is restored after the installation.

Steel helical piers are turned down into the soil until competent strata is reached. Extension shafts are added, if necessary, to reach greater depths. These steel foundation piers are the strongest components in our foundation repair arsenal, and are responsible for transferring the weight of your structure to solid, load-bearing soil. Our helical piles are available with a galvanized steel design. These piers are corrosion-resistant, for long-lasting durability. Every helical pile installation completed by Helicon comes with a Firm Foundation Warranty.

Helical pile Advantages

  • All-weather installation
  • Environmentally friendly
  • Fast installation and immediate loading
  • Immediate Loading with no cure time
  • No Excavating and no vibrating
  • Removable & reusable
  • Unlimited depth

Helical pile Common Uses 

  • Provide structural support
  • Underpin foundations

Micropiles

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Helicon is a micropile foundation contractor that is highly trained and educated on all of our foundation or ground modification methods. Micropiles are sometimes combined with other techniques to ensure a solid, compact foundation allowing you peace of mind when building.

Our micropile foundation contractor will determine if your soil will work with an “open hole” drilling method, or if hollow bar injection anchors are needed. These types of micropiles are constructed by injecting the grout into the hollow steel bar during the installation process.

We provide the most cost-effective and technically appropriate solution for your project’s needs. Every micropile foundation project completed by Helicon comes with a Firm Foundation Warranty.

 

micropile Advantages

  • Great for difficult soil conditions.
  • Supports heavy loads.
  • Mitigates foundation settlement.

micropile Common Uses

  • Provide structural support
  • Underpin foundations
  • Enhance mass stability
  • Transfer loads

Push Piers

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Helicon’s push pier foundation system is made of steel and driven deep into the soil beneath a foundation to solve settlement problems. Our push pier foundation systems can be installed inside or outside your foundation walls and are not visible once the system is complete. In many scenarios, Helicon's push piers not only stop settlement but lift the foundation back to its original position, closing cracks and improving window and door operation.

Helicon's foundation repair experts are trained installers of push pier foundation systems.  Push piers are pushed into the ground until they reach a layer of solid soil which can support the weight of the structure.  After the solid layer is reached, the piers serve as a point to lift the foundation, bypassing the unsuitable layers of soil.

Pre-Drilling

For an outside installation, the soil around your foundation must be excavated so that the footing is exposed. For an inside installation, a section of your slab floor will need to be removed to expose the footing. The slab will be restored after the installation.

A section of the footing will be prepared for each foundation pier so that the pier is supporting the wall directly, and not simply lifting the section of the footing that extends beyond the walls. This makes for the strongest installation.

Drilled Casing Piers

The drilled casing piers method is applicable to sites where the soil conditions are such that caving or excessive soil or rock deformation can occur when a hole is drilled. This can happen when the boring is made in dry soils or rocks, which are stable when they are cut but will slough soon afterwards. In such a case, the borehole is drilled, and a steel pipe casing is quickly set to prevent sloughing.

Casing is also required if drilling is required in clean sand below the water table underlain by a layer of impermeable stones into which the drilled shaft will penetrate. The casing is removed soon after the concrete is deposited. In some cases, the casing may have to be left in place permanently. It may be noted here that until the casing is inserted, a slurry is used to maintain the stability of the hole. After the casing is seated, the slurry is bailed out and the shaft extended to the required depth.

push pier Advantages

  • Can be installed inside or outside the foundation.
  • Push pier foundation systems reach great depths.
  • Installation does not require use of heavy equipment.
  • Can lift foundation back to original position.
  • Repair not visible after installation is complete.

Push Pier Common Uses

  • Transfer loads from the soil near the surface to deeper, more stable soil that is more suitable for load bearing
  •  Underpin settling foundations
  • Lifting foundation to normal state

Displacement Piles

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Helicon’s displacement piles are bored, cast in-place, grouted piles installed by advancing our unique displacement tool into the ground with a drilling platform capable of applying high torque to the displacement tool.

Displacement piles are piles that actually disturb the material they are driven into. The project manager determines where the piling spoils will be placed in the ground or determine if soil conditions support the need for this type of piling. Helicon has the necessary equipment and construction expertise to complete even the most challenging displacement piling projects in Florida.

 

Displacement Pile Advantages

  • Minimum amount of spoil material.
  • No shock and vibration during pile execution.
  • No supporting fluid also in loose soils.
  • Higher bearing capacity than LDP and CFA piles.
  • Reduced concrete consumption.
  • High daily production rate.
  • Applicable to medium-large size rig models.

Displacement Pile Common Uses

  • Provide structural support
  • Provide earth retention

Drilled Shafts

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Drilled shafts are a traditional deep foundation solution utilized all over the country for structural support. Helicon’s process of inserting drilled shafts into the ground occurs when a building project or foundation repair job requires a deep foundation system. Concrete cylinders with large diameters are inserted into the ground with reinforced steel.

Helicon uses one of two methods to construct a foundation system including a drilled shaft or a bored pile. In most cases, drilled shafts are used when the diameter of the shaft must exceed 0.6 meters, and a bore pile is used when the diameter only needs to be 0.6 meters or less.

We provide the most cost-effective and technically appropriate solution for your project’s needs. Every drilled shaft foundation project completed by Helicon comes with a Firm Foundation Warranty.

Drilled shaft Advantages

  • Inserting drilled shafts may offer a less-intrusive construction experience.
  • A single drilled shaft is as strong as several smaller piers.
  • The finished foundation will not experience ground heaving.
  • Drilled shafts are usable even in the case of ground filled with large rocks.

Drilled Shaft Common Uses

  • Provide structural support
  • Provide earth retention

Earth Retention & Shoring Geotech Construction Methods

Helicon offers a wide range of wall systems, expert earth retention solutions, and geotechnical applications. We provide a variety of Evalution & Training services to address safety, new techniques of construction, and project evaluations. Our years of experience with the full range of techniques to provide optimal earth retention & shorings solutions for each project.

Our goal is to provide the most cost-effective, least obtrusive earth retention system while affording the maximum protection to workers on the site and minimizing movement of the adjacent earth.

 


Tie Back System

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Helicon's tie back systems provide resisting force within retaining walls. Much like soil nails, tie back systems are installed at an angle, normally horizontally. Tie back systems are constructed by drilling steel bars or strand bundles into the earth to reinforce walls for stability. Typically these bars feature a helical slate or other type of anchor to act as a bearing device.

With tiebacks, variations occur in regards to the tiedown. With one end secured to the wall, the other can be anchored to a stable structure, such as a concrete deadman, which has been driven into the ground, or anchored into earth with sufficient resistance, or even to an existing structure.

At Helicon, our team of geotechnical experts can help you decide if tie back systems are the best option for your project’s needs. Every tie back system completed by Helicon comes with a Firm Foundation Warranty.

Tie Back System Common Uses

  • Transfer applied tensile load into the ground
  • Reinforce retain walls for stability

Tie Back System advantages

  • Quick to install.
  • Grouting is eliminated.
  • Anchors can be taken out and reused.

Helicon is the premier geotech construction company in Florida. Based out of Tampa, FL, we are a licensed general contractor leading the industry in full-service geotech construction work.

We are experts in pre-construction, soil and structural stabilization, & sinkhole repair. As the premier provider of geotech construction services throughout the state of Florida for nearly 15 years, Helicon prides itself on providing high quality service, for both insurance companies and private customers with handling all repairs and pre-construction work for both residential and commercial projects. We strive to exceed everyone’s expectations.

Helicon has successfully completed thousands of projects in the state of Florida with a focus on the Tampa Bay metropolitan area, including the surrounding counties of Hillsborough, Pinellas, Pasco, Hernando, Polk, Citrus and Marion counties. Our professional Helicon Teams are trained and equipped with the tools and expertise needed to execute a flawless and professional experience using the latest technology to repair or prevent for your particular project.

We invest in our teams ensuring they remain up to date on the latest industry technology and training. Our Office Teams will answer all your questions, provide professional service, give knowledgeable advice, and execute a project that will fully satisfy our customers.