Concrete foundations are a key component in every major structure. They provide the much-needed stability to structural systems, and/or heavy industrial equipment they are supporting. The foundation system and type depend heavily on the superstructure load, and soil properties. As a result, concrete foundations may appear in different shapes, and sizes. In general, foundations can be grouped as: Shallow foundations Deep foundations In reality, engineers might face a broad spectrum… Read More »Non-destructive Testing of Concrete Foundations
Piles and Foundations
Over the past decade, Canada has heavily invested in wind energy, increasing its annual capacity from nearly 2,000 MW in 2008, to 13,000 MW in 2019. That is enough to power approximately 3.3 million homes – 6% of our country’s electricity demand (Canadian Wind Energy Association, 2019). There are 299 wind farms operating from coast to coast, including projects in two of the three northern territories. While the quality control,… Read More »Non-Destructive Testing of Wind Turbine Foundation
Pile Integrity Test (PIT) is normally performed by striking the pile head with a light hand-held hammer and recording the response of the pile using a motion transducer (i.e. accelerometer) coupled
Quality control of concrete piles is a challenging task. Engineers, and contractors rely on experience and well-established procedures and test standards to verify the strength, and consistency of pile materials. Non-destructive testing help reveal potential defects that might have happened during pile casting (in the case of cast-in-place piles), or transportation and installation (in the case of precast piles). Construction and installation of concrete piles might lead to defects in… Read More »Quality Control of Concrete Piles
Pile Integrity Testing (PIT) is a non-destructive testing method for evaluating the unknown length and integrity of piles and deep foundations. The basic concept behind the technique is determining the velocity (required) and force (optional) response of pile induced by an impact device (normally, a handheld hammer). Pile Integrity Testing works best for long structural component such as driven concrete piles, cast-in place concrete piles, concrete filled steel pipe piles, timber piles,… Read More »Practical Considerations in Pile Testing
Pile Integrity Test can be used to determine the integrity of piles. The method works best for long structural component such as driven concrete piles, cast-in place concrete piles, concrete filled steel pipe piles, timber piles, structural columns. The method works based on measuring and analyzing the velocity (required) and force (optional) response of pile. A hammer (regular or instrumented) is used to impact the pile surface and induce acoustic waves… Read More »Applications and Limitations of Pile Integrity Test
Share on linkedin Share on facebook Share on twitter Share on telegram Share on whatsapp Share on email This article describes certain construction practices that can result in integrity problems in concrete piles and drilled shafts. Defects can occur at any point during the construction of bored concrete pile. Most common types of pile integrity issues are presence of voids; inconsistency in concrete mix, concrete; entrapped groundwater or slurry; and… Read More »Integrity Problems of Concrete Piles
Safety, reliability and satisfactory performance of structures require a well-planned maintenance program, as well as remedial actions in short and mid-term. Existing structures that are designed in accordance with older design codes or were built by older construction practices may need to be extensively repaired, rehabilitated, or replaced within the next few years. The remedial actions may include structural and/or foundation upgrade or replacement. Reuse of existing piles and foundations is… Read More »Reuse of Existing Piles – How NDT Can Help
Share on linkedin Share on facebook Share on twitter Share on telegram Share on whatsapp Share on email Construction and installation of concrete piles and deep foundations is a challenging task. Problems may occur during the process, which in turn results in defects or anomalies such as: pile formation problems, concrete faults, and reinforcement installation issues. The resulting defects can negatively impact the durability and mechanical performance of the pile.… Read More »What is Pile Integrity Test ?
Structure inspection manuals such as the Ontario Structure Inspection Manual (OSIM) mostly emphasizes on the visual inspection and physical condition of bridge structures. The visual inspection methodology in this guideline consists of close up visual assessment of defects in the superstructure and substructure. This methodology is limited to inspection of elements that are at the arms length. For elements with difficult access (i.e. long girders mid-span or deck over river or… Read More »How to Evaluate Concrete Piles?