GEM Triangular Culvert

Ranked #1 in culvert competition.

 

The GEM Triangular Culvert(Patent's and Patent's pending) has many environmental impact and hydro-flow advantages over the old technology culverts (Round & Box). To the best of our knowledge the GEM Triangular Culvert is the only culvert designed that has been  tested using Auto-Desk software.  The software was used to test structural and flow capabilities, and compare our technology with the old traditional round and box culvert designs.  GEM Triangular Culverts are engineered and designed according to site requirements and hydrology reports, common to the industry. When selecting a GEM Triangular Culvert engineering flow analysis will be used for the appropriate size selection. GEM Triangular Culverts are manufactured out of environmentally friendly products, designed for low maintenance minimal environmental impact and maximum longevity. Our Gem Triangular Culvert has many advantages over the old technologies of round and box culverts.  The non-polluting construction maintains minimal erosion on the environment and has low heat transfer therefore an excellent choice for sensitive environmental areas, such as permafrost conditions.  Our advantages are numerous, as we appear to be superior in 31 of 32 aspects of a culvert derived by experts in the industry and placing 2nd in the weight category competing against round concrete & steel culverts and concrete box culverts. This indicates the GEM Culvert to be the superior and ultimate choice in road construction culvert selection today. Engineering and documentation can be provided by the GEM Team on request.  

Advantages of the New and Innovative Technology of the Pre-cast GEM Triangular Culvert:

Culvert designs are ranked by superiority in various categories with numbers 1 to 4, with one having top ranking.  Generally all rankings are validated by computer simulation and experienced professionals.  In testing all technologies GEM Holdings, has found the Autodesk Software to be useful and accurate.

  1. Structural Strength
  1. GEM Culvert (using 10” of concrete)
  2. GEM Culvert (using 6” of concrete)
  3. Box Concrete Culvert (using 10” of concrete)
  4. Round Concrete Culvert (using 10” of concrete)
  5. Round Steel Culverts (using 3/8” galvanized steel)

2. Quick Assembly and Ease of On-site installation, resulting in time savings. 

  1. GEM Culverts (Using the Innovative GEM Substructure)
  2. Box Concrete Culvert
  3. Round Concrete Culvert
  4. Round Steel Culverts (multi-plate type)

 3. Ease of Compaction

  1. GEM Culverts (Triangle easier to compact then a round or box design)
  2. Box Concrete Culvert
  3. Round Steel Culverts
  4. Round Concrete Culvert

 4.Ease of Inspection 

  1. GEM Culverts (3 independent components – fewer stress fractures in corners and at low water grade)
  2. Box Concrete Culvert
  3. Round Concrete Culvert
  4. Round Steel Culverts

5.Low profile to accommodate flood conditions where elevating the grade is expensive or not feasible

  1. GEM Culverts
  2. Box Concrete Culverts
  3. Round Steel Culverts
  4. Round Concrete Culverts

6. High water transfer at low flow conditions

  1. GEM Culverts
  2. Box Concrete Culverts
  3. Round Concrete Culverts
  4. Round Steel Culverts

7. High water transfer at annual flood conditions

    1.  GEM Culverts (highest velocity)
    2. Box Concrete Culverts
    3. Round Culverts

8. High water transfer at full flow flood conditions with equal entrance area

  1. GEM Culverts – highest velocity
  2. Box Concrete Culverts
  3. Round Concrete Culverts
  4. Round Steel Culverts

9. High Durability

  1. GEM Culvert (using 10” of concrete)
  2. GEM Culvert (using 6” of concrete)
  3. Box Concrete Culvert
  4. Round Concrete Culvert
  5. Round Steel Culverts

10. Weight Advantage

  1. Steel culverts
  2. GEM Culvert (using 6” of concrete)
  3. GEM Culvert (using 10” of concrete)
  4. Round Concrete Culvert (using 10” of concrete)
  5. Box Concrete Culvert (using 10” of concrete)

11. Advantageous in freezing conditions

  1. GEM Culverts (ability to absorb expansion forces with stress relief at corners)
  2. Round Steel Culverts
  3. Round Concrete Culverts
  4. Box Concrete Culverts

12. Cost Effective

  1. GEM Culvert (using 6” concrete)
  2. GEM Culvert (using 10” concrete)
  3. Box Concrete Culvert
  4. Round Concrete Culvert
  5. Round Steel Culverts – shorter life expectancy with intensive labour assembly, and intensive installation procedure

13. Mechanical Seal – unlike individual seals as found in round and box modular culverts – locks together but can move at apex.

  1. GEM Culvert (unique Technology – used in 6” concrete culvert)
  2. GEM Culvert (unique Technology – also used in 10” concrete culvert)
  3. Round Steel Culverts
  4. Round Concrete Culvert
  5. Box Concrete Culvert

14. Advantages in Permafrost (new technology) that limits thermal conduction, and is installed level to grade therefore, less requirements for steaming, lower maintenance, therefore dollar savings.

  1. GEM Culverts
  2. Box Concrete Culverts
  3. Round Concrete Culverts
  4. Round Steel Culverts

15. Wildlife accommodation and design to accommodate fish survival with a greater base area.

  1. GEM Culverts (sheltered corners for smaller animals)
  2. Box Concrete Culverts
  3. Round Concrete Culverts
  4. Round Steel Culverts

16. Wider water dispersal area, therefore reducing the need for expensive rip-rap for erosion control, accommodating high velocity water flow.

  1. GEM Culverts (rapid energy dispersal)
  2. Box Concrete Culverts
  3. Round Concrete Culverts
  4. Round Steel Culverts

17. Reduced Water Control Cost due to rapid assembly (reference to transfer of water across stream bed).

    1. GEM Culvert (using 6” concrete)
    2. GEM Culvert (using 10” concrete)
    3. Box Concrete Culvert
    4. Round Concrete Culvert
    5. Round Steel Culverts

 18. Longevity

    1. GEM Culvert – has a single surface deflection site, with stress relief in corners (using the 10” concrete culvert)
    2. GEM Culvert – has a single surface deflection site, with stress relief in corners (using the 6” concrete culvert)
    3. Box Concrete Culvert
    4. Round Concrete Culvert
    5. Round Steel Mufti-plate culvert   

19. Longevity - due to rust inhibited micro rebar for structural quality, depending on the purchase order, as well as stress relief in the corners, which reduces Concrete fractures or cracking.

    1. GEM Culverts
    2. Box Concrete Culvert
    3. Round Concrete culvert
    4. Round Steel Culvert

20. Flow increase due to function of inlet design - (validated by testing of the Box Concrete Culvert)

    1.  GEM Culverts use a 60° wall, therefore reducing vertical force efficiency loss as would occur in a 90° horizontal wall.
    2. Box Concrete Culvert with its’ inlet design, using a vertical wall as described in (Ref. a) testing
    3. Round Culverts inability to install an efficient inlet design

21. Maintenance

    1. GEM Culverts - less road aggregate deflection
    2. Box Concrete Culvert - 2 deflection sites
    3. Round Steel Culvert – limited uneven compaction and larger deflection site
    4. Round Steel Culvert limited uneven compaction and larger deflection site

22. Ease of Removal off site to new location

    1. GEM Culverts – no bolts or fasteners with designed lift sites
    2. Box Concrete Culvert
    3. Round Concrete Culvert
    4. Round Steel Culvert

23. Extending Culvert due to design changes – or requirements

    1. GEM  Culverts
    2. Box Concrete Culvert
    3. Round Concrete Culvert
    4. Round Steel Culvert

24. Installing culvert without temporary road construction

    1. GEM Culverts
    2. Box Concrete Culvert
    3. Round Concrete Culvert
    4. Round Steel Culvert

 25. Water control during installation without temporary construction

    1. GEM Culverts are installed at grade level (low water level)
    2. Box Concrete Culvert (below water level to accommodate erosion concerns)
    3. Round Concrete Culvert (below water level to accommodate erosion concerns)
    4. Steel one-piece Culvert (below water level to accommodate erosion concerns)

26. Reduced need for replacement therefore reduced costly disturbance of pavement or roadways.

    1. GEM Culverts
    2. Box Concrete Culvert
    3. Round Concrete Culvert
    4. Round Steel Culvert

27. Surface deterioration due to lifting caused by upward forces from dynamic loads

    1. GEM culvert primarily reflects, or directs the forces downwards relative to the surface at approximately 15° to the horizontal.
    2.  The round culverts deflect 45° or ½ of their exposed surface to the dynamic forces upward to the surface, increasing at the apex
    3. The Box Concrete Culvert deflects the total dynamic forces exposed to the top of the culvert upwards to the road surface at 45°
    4. The static load or point load of the triangular shape is superior to the round or box designs

28. Water flow efficiency relative to entrance area

    1. GEM Culverts 11% flow increase plus entrance designs
    2. Box Concrete Culvert 5% flow increase plus entrance designs
    3. Round Concrete Culvert 1% flow increase N/A
    4. Round Steel Culverts 1% flow increase N/A

 29. Discharge water at exit design (ref. pages 9 - 11)

    1. GEM Culverts have a wider base, with discharge design capable of returning water to stream bed velocity, therefore limited erosion
    2. Round Culvert designs
    3. Box Concrete Culvert designs

30. Reducing high energy water flow at exit – (ref. pages #9 -10)

    1. GEM Culverts – energy dissipated in approximately 18’ from exit
    2. Round culvert – energy dissipated in approximately 36’ from exit
    3. Box Concrete Culvert – energy dissipated in approximately 60’ plus                                                                       GEM Culverts – Rotational effect is not possible in this type of culvert.

31. Rotational effect on various culvert shapes.

  1. GEM Culverts – Rotational effect is not possible in this type of culvert.
  2. Round Culvert – Results are minimal, but disturbance of compaction occurs.
  3. Box Concrete Culvert – Effect on box culvert on open base would be substantial. Effect on enclosed box culvert would be much less, but still can occur.
  1. Culvert Failures at the joints or end seals due to compaction failure and settling of soil.
  1. GEM Culverts – Retains due unique seal system
  2. Steel Box Culvert – This cannot fail, but longevity reduces 50 percent less then concrete culverts approximately.
  3. Round culvert – Seals can leak, resulting in culvert failure.
  4. Box Concrete Culvert – Seals can leak, resulting in culvert failure.

Conclusion:

1. GEM culvert attained first place in 31 of 32 categories, and second    in weight category.  

2. Items 2, 3, and 22 result in less time with an open stream bed resulting in increased Public Safety. GEM Technology available to reduce installation times.

3. Items 18 and 19 indicate fewer culvert replacements over time resulting in cost savings.

4. Lower transportation costs to site, when compared to other cement culverts (ref. Item 2, 3, and 10)

5. Items 29 and 30 indicate reduced environmental impact (geomorphic and erosion)

6. GEM’S ability to dissipate energy, lowers downstream liability of “off right of way” erosion compared to other designs.

Complete manual available upon request.  

GEM SERVICES PROVIDED

Project Assessment

  • Project Costing
  • Budget Estimating
  • Project Consulting

Site Survey

  • Site Surveying and Assessment

Engineering Designs & Services

  • Site Installation
  • Site Safety
  • Calculating Hydro Flows
  • Calculating Culvert Sizes
  • Stress & Dynamic Analysis on Models with Software
  • Fluid Flow Analysis Optimisation with Software
  • Environmental Impacts 
  • Erosion Control
  • Addresses Permafrost Concerns

Environmental Assessment

  • No Wildlife Harm (Birds & Fish)
  • Limits or eliminates erosion or metamorphic impact as compared to other designs.

Installation

  • Site Installation
  • Transportation of Product to Site
  • Site Assembly