Screen and Prioritize Asset Inventory

Screen and Prioritize Asset Inventory

Inversa collaborates with the asset owner to organize large inventories of buried infrastructure into a prioritized set of assets. The prioritization of the asset’s is based on technical considerations as well as the organizations unique strategic goals. 

Technical Considerations are the size of the individual structure, past condition information, hydraulic capacity, depth of bury, traffic volume and cost of replacement. 

Strategic Considerations are future construction plans, future load requirements, criticality profile of the asset, strategic route status, life extension goals, safety requirements and budget.

Visual Appraisal

Visual Appraisal

The InScribe™ tablet app is used to carry out the visual appraisal of each asset. The tablet app takes the most rigorous visual inspection protocols from around North America and combines them with Inversa’s field procedures. This makes InScribe™ an industry-leading single tool for collecting all relevant condition information.

The Visual Appraisal procedure includes the assessment of nine key features (1) Pavement, (2) Guardrail, (3) Headwall, (4) Embankment, (5) Waterway blockages, (6) Corrosion and coatings, (7) Scour, shape, dents, and localized damage, (8) Cracks, seams and joints and (9) Pipe alignment

Ovality measurements are also included when ovality is present. A site elevation profile is included to assist in rehabilitation design.

Acoustic Assessment

Acoustic Assessment

The purpose of the acoustic assessment or “knock test” is to determine the quantity (not presence or magnitude) of suspected voids in the pipes supporting soil to aid in targeting and prioritizing which anomalies to image with BCT. A detailed knock test is done on every second corrugation (approximately every 15-20cm) on both sides of the pipe, at five relative elevations— waterline, pipe springline, forty five degrees above and below springline and roofline. 

Based on the acoustic inspection, the pipe map is generated to guide diagnostic imaging.

The orientation of acoustic anomalies provides useful information about the nature of the soil failure mode. Acoustic anomalies located horizontally in the haunches of the pipe are indicative of a flow related failure or water travelling outside of the pipe as it flows down stream.  Acoustic anomalies located vertically from the roadway or the embankment in a column around the pipe barrel is indicative of water flowing from the surface.

Validate Soil Stability and Failure Mode with InSight™

Validate Soil Stability and Failure Mode with InSight™

Utilizing results from the visual and acoustic inspection, areas for Insight™ diagnostic imaging are selected. The Insight™ BCT scanner is positioned against the pipe wall and the region is imaged to verify presence of supporting soil.

This image shows a transition from adequate supporting soil on the left to a region of soil voiding on the right. The white wave at the bottom of the image is the corrugated metal pipe wall. 

To learn more about Insight™ diagnostic imaging and BCT go to the technology section. 

Rehabilitation Recommendations and Asset Management

Rehabilitation Recommendations and Asset Management

The asset specific management plans are intended to follow up SoilSight™ condition assessments. This approach provides the client with a clear path forward for rehabilitation in the form of a detailed design check. The goal of this work is to optimize each assets life cycle cost based on a variety of technical and strategic considerations.

Technical Considerations:

  • condition assessment results
  • technical concerns (geotechnical, hydraulic, environmental etc.)
  • available trenchless rehabilitation approaches 
  • engineering design requirements
  • safety

The rehabilitation recommendations are intended to consider only the best viable technical options available to the client.

Strategic Considerations

  • social costs of traffic disruption
  • desired life expectancy
  • future plans for development
  • future plans for roadway maintenance
  • strategic use

Both groups of considerations are balanced against the ROI analysis between replacing the pipe and rehabilitating it. Each asset is considered independently and recommendations are made to optimize the life cycle based on the current condition state.

Screen and Prioritize Asset Inventory

Screen and Prioritize Asset Inventory

Inversa collaborates with the asset owner to organize large inventories of buried infrastructure into a prioritized set of assets. The prioritization of the asset’s is based on technical considerations as well as the organizations unique strategic goals. 

Technical Considerations are the size of the individual structure, past condition information, hydraulic capacity, depth of bury, traffic volume and cost of replacement. 

Strategic Considerations are future construction plans, future load requirements, criticality profile of the asset, strategic route status, life extension goals, safety requirements and budget.

Visual Appraisal

Visual Appraisal

The InScribe™ tablet app is used to carry out the visual appraisal of each asset. The tablet app takes the most rigorous visual inspection protocols from around North America and combines them with Inversa’s field procedures. This makes InScribe™ an industry-leading single tool for collecting all relevant condition information.

The Visual Appraisal procedure includes the assessment of nine key features (1) Pavement, (2) Guardrail, (3) Headwall, (4) Embankment, (5) Waterway blockages, (6) Corrosion and coatings, (7) Scour, shape, dents, and localized damage, (8) Cracks, seams and joints and (9) Pipe alignment

Ovality measurements are also included when ovality is present. A site elevation profile is included to assist in rehabilitation design.

Acoustic Assessment

Acoustic Assessment

The purpose of the acoustic assessment or “knock test” is to determine the quantity (not presence or magnitude) of suspected voids in the pipes supporting soil to aid in targeting and prioritizing which anomalies to image with BCT. A detailed knock test is done on every second corrugation (approximately every 15-20cm) on both sides of the pipe, at five relative elevations— waterline, pipe springline, forty five degrees above and below springline and roofline. 

Based on the acoustic inspection, the pipe map is generated to guide diagnostic imaging.

The orientation of acoustic anomalies provides useful information about the nature of the soil failure mode. Acoustic anomalies located horizontally in the haunches of the pipe are indicative of a flow related failure or water travelling outside of the pipe as it flows down stream.  Acoustic anomalies located vertically from the roadway or the embankment in a column around the pipe barrel is indicative of water flowing from the surface.

Validate Soil Stability and Failure Mode with InSight™

Validate Soil Stability and Failure Mode with InSight™

Utilizing results from the visual and acoustic inspection, areas for Insight™ diagnostic imaging are selected. The Insight™ BCT scanner is positioned against the pipe wall and the region is imaged to verify presence of supporting soil.

This image shows a transition from adequate supporting soil on the left to a region of soil voiding on the right. The white wave at the bottom of the image is the corrugated metal pipe wall. 

To learn more about Insight™ diagnostic imaging and BCT go to the technology section. 

Rehabilitation Recommendations and Asset Management

Rehabilitation Recommendations and Asset Management

The asset specific management plans are intended to follow up SoilSight™ condition assessments. This approach provides the client with a clear path forward for rehabilitation in the form of a detailed design check. The goal of this work is to optimize each assets life cycle cost based on a variety of technical and strategic considerations.

Technical Considerations:

  • condition assessment results
  • technical concerns (geotechnical, hydraulic, environmental etc.)
  • available trenchless rehabilitation approaches 
  • engineering design requirements
  • safety

The rehabilitation recommendations are intended to consider only the best viable technical options available to the client.

Strategic Considerations

  • social costs of traffic disruption
  • desired life expectancy
  • future plans for development
  • future plans for roadway maintenance
  • strategic use

Both groups of considerations are balanced against the ROI analysis between replacing the pipe and rehabilitating it. Each asset is considered independently and recommendations are made to optimize the life cycle based on the current condition state.