Coastal Foundation Solutions experience in ground improvement and development of innovative pile designs provides clients cost-effective design build solutions.
The basics in designing any foundation starts with the weakest link, which is predominantly the soil. Consequently, it is greatly recommended to commence with a geotechnical analysis (soil borings) before designing any project. Once soil data is secured, a geotechnical engineer may provide pile recommendations based on subsurface soil conditions.
Geotechnical conditions and the structural design of the helical pile will impact the pile capacity. Helical piles are designed so most of the capacity of the pile is generated through the bearing of the helix plates against the soil. Shaft friction is not a contributing factor to a helical piling unless it is a grouted pile. Consequently, ground conditions and the pile design itself are significantly important.
As new project designs are implemented within complex environments, the essential geotechnical plans and structural blueprints are also more complex predictably requiring multiple services. The advent of the Surfside Tower collapse in Miami and Hurricane Ian has design professionals strongly securitizing foundation projects.
Coastal Foundation Solutions experience in ground improvement and development of innovative pile designs provides clients cost-effective design build solutions.
The basics in designing any foundation starts with the weakest link, which is predominantly the soil. Consequently, it is greatly recommended to commence with a geotechnical analysis (soil borings) before designing any project. Once soil data is secured, a geotechnical engineer may provide pile recommendations based on subsurface soil conditions.
Geotechnical conditions and the structural design of the helical pile will impact the pile capacity. Helical piles are designed so most of the capacity of the pile is generated through the bearing of the helix plates against the soil. Shaft friction is not a contributing factor to a helical piling unless it is a grouted pile. Consequently, ground conditions and the pile design itself are significantly important.
As new project designs are implemented within complex environments, the essential geotechnical plans and structural blueprints are also more complex predictably requiring multiple services. The advent of the Surfside Tower collapse in Miami and Hurricane Ian has design professionals strongly securitizing foundation projects.
Structural designers and engineers need to contemplate the following dynamics when designing for specifics and its foundations:
The design professional has a new pile option to consider when designing a pile supported structure in Florida.
We can also contact our network of national product teams to provide engineered support for complex piling requirements. Our local and regional ground knowledge enables us to create and target optimal solutions for pile supported projects.
Structural designers and engineers need to contemplate the following dynamics when designing for specifics and its foundations:
The design professional has a new pile option to consider when designing a pile supported structure in Florida.
We can also contact our network of national product teams to provide engineered support for complex piling requirements. Our local and regional ground knowledge enables us to create and target optimal solutions for pile supported projects.
The only way to truly confirm site-specific helical pile capacity is by conducting a full-scale load test. Load tests verify ultimate pile performance by confirming the relationship between applied loading and pile head movement over a specified period. Ultimate helical pile capacity is the maximum load attained when either plunging of the screw pile occurs or when the net deflection surpasses 10% percent of the average helix plate diameter, whichever occurs first. Final pile deflection is defined as the total pile head deflection minus the flexible lengthening or shortening of the shaft.
Static Load tests for helical piles are no further complicated than load tests for other deep foundations systems, and in similar configurations, are less expensive. The other attribute of helical/screw piling is their minimal impact on the construction site and schedule. Load tests allow engineers to develop more efficient designs, provide significant cost savings with modified piling designs, and reduce project time. Even without a potential overall cost savings, load tests provide design professionals, and clients with an increased understanding of helical pile performance.
The in-field piling load test provides engineers confidence that helical piles will perform as anticipated, often time with higher capacities then anticipated.
Project owner’s and their design professionals favor a foundation option that minimizes construction traffic, site interruption, and surrounding neighbors.
The only way to truly confirm site-specific helical pile capacity is by conducting a full-scale load test. Load tests verify ultimate pile performance by confirming the relationship between applied loading and pile head movement over a specified period. Ultimate helical pile capacity is the maximum load attained when either plunging of the screw pile occurs or when the net deflection surpasses 10% percent of the average helix plate diameter, whichever occurs first. Final pile deflection is defined as the total pile head deflection minus the flexible lengthening or shortening of the shaft.
Static Load tests for helical piles are no further complicated than load tests for other deep foundations systems, and in similar configurations, are less expensive. The other attribute of helical/screw piling is their minimal impact on the construction site and schedule. Load tests allow engineers to develop more efficient designs, provide significant cost savings with modified piling designs, and reduce project time. Even without a potential overall cost savings, load tests provide design professionals, and clients with an increased understanding of helical pile performance.
The in-field piling load test provides engineers confidence that helical piles will perform as anticipated, often time with higher capacities then anticipated.
Project owner’s and their design professionals favor a foundation option that minimizes construction traffic, site interruption, and surrounding neighbors.
Installing Helical Piles into hard rock can create a spin out (Refusal) without penetration into the rock layer. In these instance’s the torque capacity is no longer defined or measured. The digital torque indicator will no longer secure torque values as the pile is presenting no resistance and churning on rock. If the solid rock cannot be penetrated, alternative piling solutions will need to be entertained such as changing to micro pulldown pilings or grouted hollow bar piles.
Helical piles are best suited for ground conditions with progressively increasing soil strength or where there is a gradual weathering profile above the top of rock layer. In these surroundings, it is much more likely that the helix’s will be totally seated, that is, the helix’s will be imbedded within the surrounding layer. This creates torsional values which are transmitted to our torque correlation equipment, providing real pile capacity.
Helical pile shafts are more slender than other types of pile foundations rendering them more disposed to buckling in poorly supporting soils. When a helical piling is required to travel through deep deposits of weak soils and/or liquefiable soils, there is an increased risk of shaft buckling. Consequently, the helical pile must be designed to overcome this situation by increasing shaft diameter or the addition of an external grout column.
Installing Helical Piles into hard rock can create a spin out (Refusal) without penetration into the rock layer. In these instance’s the torque capacity is no longer defined or measured. The digital torque indicator will no longer secure torque values as the pile is presenting no resistance and churning on rock. If the solid rock cannot be penetrated, alternative piling solutions will need to be entertained such as changing to micro pulldown pilings or grouted hollow bar piles.
Helical piles are best suited for ground conditions with progressively increasing soil strength or where there is a gradual weathering profile above the top of rock layer. In these surroundings, it is much more likely that the helix’s will be totally seated, that is, the helix’s will be imbedded within the surrounding layer. This creates torsional values which are transmitted to our torque correlation equipment, providing real pile capacity.
Helical pile shafts are more slender than other types of pile foundations rendering them more disposed to buckling in poorly supporting soils. When a helical piling is required to travel through deep deposits of weak soils and/or liquefiable soils, there is an increased risk of shaft buckling. Consequently, the helical pile must be designed to overcome this situation by increasing shaft diameter or the addition of an external grout column.
A galvanized steel helical piling is commonly used where the soil profile is not resilient enough to support a concrete spread footer or structure. The installation technique of a helical pile is quite simple. Helical piles are rotated into the ground, much like a wood screw or large lag bolt.
With the use of a competent size excavator, a hydraulic anchor drive is employed to apply the substantial torque that is required to screw a helical pile into the ground. The pile travels to a point where it finds a strong resilient soil profile capable of supporting the structure and meeting engineered capacity (The pile is screwed into the ground not augured).
Once the helical pile is installed, a cut off elevation is determined using the architectural plans. The pile works in conjunction with a concrete footer or grade beam to provide the engineered designed capacities. There are various configurations of steel termination plates added to the top of helical piles dependent on pile capacities. The most common engineered termination plate is 8” x 8” x ½” thick steel plate either bolted or welded unto an extension segment.
Helical/Screw piles are installed with smaller, standardized equipment, it maintains a very compact, and quiet installation process. In addition, there are never any messy or contaminated spoils to deal with. The pile provides ideal foundation support for sites where there might be low clearance, low overhead conditions, or on site restrictions.
The selection of hydraulic anchor drives, and handling excavator is ultimately determined by:
A galvanized steel helical piling is commonly used where the soil profile is not resilient enough to support a concrete spread footer or structure. The installation technique of a helical pile is quite simple. Helical piles are rotated into the ground, much like a wood screw or large lag bolt.
With the use of a competent size excavator, a hydraulic anchor drive is employed to apply the substantial torque that is required to screw a helical pile into the ground. The pile travels to a point where it finds a strong resilient soil profile capable of supporting the structure and meeting engineered capacity (The pile is screwed into the ground not augured).
Once the helical pile is installed, a cut off elevation is determined using the architectural plans. The pile works in conjunction with a concrete footer or grade beam to provide the engineered designed capacities. There are various configurations of steel termination plates added to the top of helical piles dependent on pile capacities. The most common engineered termination plate is 8” x 8” x ½” thick steel plate either bolted or welded unto an extension segment.
Helical/Screw piles are installed with smaller, standardized equipment, it maintains a very compact, and quiet installation process. In addition, there are never any messy or contaminated spoils to deal with. The pile provides ideal foundation support for sites where there might be low clearance, low overhead conditions, or on site restrictions.
The selection of hydraulic anchor drives, and handling excavator is ultimately determined by: