Contents

  • Cover
  • Introduction
  • Essentials
    • Identifying and managing risk
    • Starting the job – be prepared
    • The job is not finished until it is signed-off
  • Basics
    • Roading terms
    • Basics about soil
  • Good construction
    • A well-constructed road
    • A well-constructed landing
  • Earthworks
    • Clearing and stripping
    • Cut and sidecast construction
    • Cut and bench fill construction
    • Full bench construction with end-haul
    • Earthworks compaction
    • Forming the landing
    • Forming curves and in-bends
    • Stabilising cut/fill slopes
    • Fixing weak formation
    • Final grading before metalling
  • Water control
    • Water control overview
    • Water table drains
    • Water table drainage culverts
    • Berms and cut-outs
    • Flumes
    • Silt traps
    • Silt fences
  • Culvert waterway crossings
  • Temporary bridges
  • Metalling
  • Maintenance of roads
    • General maintenance
    • Maintenance of new roads
    • Maintenance of harvesting roads
    • Maintenance of low-use roads
  • Assisting loggers and harvesting rehab
    • Installing deadmen
    • Harvesting track rehab
    • Landing rehab
  • Want to learn more?
  • Glossary

NZ Forest Road Engineering Manual: Operators Guide

  1.  ›
  2. Maintenance of roads ›
  3. Maintenance of harvesting roads
 

Maintenance of harvesting roads

Common issues

  • Corrugations are normally created on steep road segments from uphill traffic.
  • Corrugations get worse if they are not fixed.
  • A short-term fix is to grade to the depth of the corrugation, re-shape, spread metal, water and roll to compact.
  • A long-term solution is to use a clay binder, lime stabiliser or tar sealing.
  • Check water control during and after harvest.
  • Loggers often damage water controls.
  • Wet weather, the steep grade and poor road shape has led to surface rutting.
  • Fix by cutting, grading and compaction.
  • Fix in good weather and when material is not too wet or dry.
  • Use a good metal aggregate.
  • Heavy traffic can cause severely rutted roads.
  • This road is failing. Water has gone through the metal, and weakened the formation. Mud is where metal should be.
  • For fixing deep ruts refer to the ‘Fixing weak formation’ section.
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