1c. location, design, specs, and costs of roads

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LVR Location and Design LVR Location and Design Low-Volume Road Costs Gordon Keller, PE, GE Geotechnical Engineer [email protected] or [email protected] 1

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Page 1: 1c. location, design, specs, and costs of roads

LVR Location and DesignLVR Location and Design

Low-Volume Road Costs

Gordon Keller, PE, GEGeotechnical [email protected] [email protected]

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РОЗТАШУВАННЯРОЗТАШУВАННЯ(LOCATION)(LOCATION)

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Use All Sources of Use All Sources of InformationInformation

– Topographic Maps – Photos – Employees/workers familiar

with the area – The existing road network– Areas of Private Lands – Soils maps and geologic conditions

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Identify Points of Control on the map

• Starting Point

• Ending Point

Community

Market

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Identify Points of Control on the map

• Intermediate Control Points

• Creek Crossings• Saddles

Rock Outcrops• Road Intersections

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Identify “Identify “Red FlagRed Flag” areas to ” areas to be avoided!be avoided!

• Areas of unstable soils• Wet areas/flat areas• Steep slopes• Rocky areas• Major river crossings or other barriers• Private Lands• Special areas/ biological/archeological

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Дорога повинна повторювати Дорога повинна повторювати природні контури рельєфуприродні контури рельєфу

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Мінімальний ухил дороги повинен складати 2-3%Максимальний ухил дороги не повинен перевищувати12-15%

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Road GradesRoad Grades• The minimum road grade

should be 2-3%• The maximum road grade

should be less than 10-12%, depending upon:– Soil Types

Erosiveness of the soil The type of trucks/vehicles

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SURVEYSURVEY

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DESIGNDESIGN

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Специфікація Сільська під'їзна дорога

Колекторна дорога

   

Номінальна швидкість25-35 км/год 45-60 км/год

Ширина дороги 3.5-4.5 м 4-5.5 м

Ухил дороги 15% макс. 12% макс.

Радіус повороту 15 м. мін. 25 м. мін.

Нахил До/ від схилу (5%)До/від схилу або випуклість(5%)

Тип покриттяПрироднє або гравій

гравій, тверде покриття

Норми проектування типової дороги з низькою інтенсивністю руху

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БУДІВНИЦТВОБУДІВНИЦТВО(CONSTRUCTION)(CONSTRUCTION)

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QUALITY CONTROLQUALITY CONTROLSAMPLING/TESTINGSAMPLING/TESTING

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Ви отримуєте те, що ви контролюєте Не те, що ви очікуєте

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SPECIFICATIONSSPECIFICATIONS&&

DRAWINGSDRAWINGS

Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects

FP-14UNITED STATES DEPARTMENT OF TRANSPORTATIONFederal Highway Administration

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Section 602. — CULVERTS AND DRAINSDescription602.01 This work consists of furnishing and installing culverts, drains, and precast concrete box culverts.Material602.02 Conform to the following Sections and Subsections:Asphalt mastic 702.04Concrete pipe 706Gaskets for concrete pipe 706.08Gaskets for ductile iron pipe 707.18Gaskets for metal pipe 707.17Gaskets for plastic pipe 708.08Lean concrete backfill 614Metal pipe 707

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Construction Requirements602.03 General. Furnish culvert pipe with a wall thickness not less than that shown in the plans or determined from the fill-height tables included in the plans. Use the same material and coating on contiguous pipe sections and special sections (such as elbows and branch connections). For culvert extensions, furnish the same material as the existing culvert.602.04 Laying Concrete Pipe and Precast Concrete Box Culverts. Start at the lower end and lay the bell or groove end upgrade. Fully join sections with leak-resistant seals using one of the following methods:602.08 Acceptance. Material for culverts, drains, and precast concrete box culverts furnished will be evaluated under Subsections 106.02 and 106.03.Installation of culverts, drains and precast concrete box culverts will be evaluated under Subsections 106.02 and 106.04.Excavation and backfill will be evaluated under Section 209.Measurement- Payment602.10 The accepted quantities will be paid at the contract price per unit of measurement for the Section 602 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

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The Summary• Mark the final field location accurately

on the map. Confirm it in the field and stake the alignment.

• Develop Plans and Specifications• Make a final estimation of costs• Leave Documentation notes and

maps!!!!– Road Location and Design Report

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KEY COST ITEMSKEY COST ITEMS

• ClearingClearing• ExcavationExcavation• RevegetationRevegetation• Channel CulvertsChannel Culverts• Cross-Drain CulvertsCross-Drain Culverts

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Рекультивація

розчистка

Дорожнє полотноЗемельні роботи

Рекультивація

Дренажна труба = 1m

ухил

розчистка

Дорожнє полотно

Земельні роботи

Рекульти

вація

ухил

Реку

льти

ваці

я

насип

Поперечна дренажна труба +1 m

Особливості будівництва доріг в залежності від нахилу поверхні

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ВІДКОСИa. Збалансований відкіс і насип

b. Повна виїмка тераси

грунту

2:1 типово

Насип

Виймання

0-60% ухил

Типовий відкіс для твердої породи: від ¼:1 до ½:1

Типовий відкіс для більшості порід: від ¾:1 до 1:1

Дорога

Виїмка тераси доцільна, коли ухил перевищує +/- 60%

Будуйте відкоси і насипи споруд на гірських схилах зі збалансованим розрізом профілю

Материнський грунт

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OTHER MAJOROTHER MAJOR COST ITEMS COST ITEMS

• Surfacing-Gravel/PavementSurfacing-Gravel/Pavement• BridgesBridges• End Hauling MaterialEnd Hauling Material• Retaining StructuresRetaining Structures• Other FactorsOther Factors

–Right-of-WayRight-of-Way–Overlooks, EtcOverlooks, Etc

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SURFACING MATERIALSSURFACING MATERIALS

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BRIDGESBRIDGES

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MAJOR CULVERTSMAJOR CULVERTS

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END HAUL MATERIALEND HAUL MATERIAL

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WALLS/STRUCTURESWALLS/STRUCTURES

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Importance of RoadingImportance of Roading• Code of Forest Practice

– Poorly designed or maintained timber production roads have the potential to create significant environmental impacts, particularly on water quality and river health.

– Plans for roads must be based on field surveys to ensure that all environmentally sensitive locations are identified and appropriate design and construction techniques are adopted.

• VicForests Roading Instruction– The cost of providing road works is significant and

is therefore an important business process that requires thorough and appropriate financial and environmental planning and approval's processes.

Lachlan Spencer, VicForests Road Planner

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