SCHOOL ROAD

Ground improvements for new crusher pockets using high pressure grouting with TAM pipes

Project Overview

 

A new commercial development on School Rd in Wellington required to the existing slope to be cut back to allow for a larger building footprint. Cutting back the face in the fractured Wellington greywacke required an actively stabilized system to retain the face.

Our method to utilize our custom-built high reach drill enabled our client to cut the face more quickly and in one process as we could reach all the way up with no benches required. This improved the earthworks program substantially allowing the development to progress ahead of schedule.

 

Geovert Solution

 

A flexible Geobrugg mesh with tensioned rock anchors was utilized in place of the shotcrete facing commonly used in Wellington as it allows the slope to move during seismic events, naturally drains and vegetates. Open hole drilling using a DTH was used with the drill from below only utilising rope access to install and grout the nails once the drilling was completed limiting exposure time for crew near the rotating drill. Approximately 900m2 of mesh was tensioned to the face with 200No rock anchors.

Our team on the ground were able to provide a solution for the client when a localised area within the cutting was quite badly fractured and ground collapsing during drilling. By quickly changing out the rotary drill with a backup top hammer onsite, we were able to install grout flushed hollow bar anchors that were in stocked in our yard to eliminate potential delays.

Ground Engineering Capabilities

Ground Engineering Market Sectors

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Australia Headquarters

Block B, Level 1, 

Suite 8 / 247 King St,

Mascot, NSW 2020, 

Australia

+61 (2) 9700 7975

New Zealand Headquarters

15 Kaimahi Rd
Wairau Valley
North Shore 0627

+64 9 837 7808

United States Headquarters

1919 W Elk Pl
Denver, CO 80211
United States

+1 720 452 1191

Singapore Headquarters

80 Robinson Road, #02-00
Singapore 068898

+65 9640 2997

Asset Integrity Maintenance 

Capabilities:

Blasting and Painting

Bridge Maintenance

Certified Fall Arrest Anchor Systems

Concrete Condition Inspections

Concrete Repair and Crack Injections

Condition Surveys

Confined Space

Corrosion Management

Fabrication and Welding

Industrial Cleaning and Water Blasting

Non-Destructive Testing (NDT)

Plant Shutdowns

Protective Coatings and Waterproofing

Refractory Maintenance

Rope Access

Rigging and Heavy Lifting

Seismic and Structural Strengthening

Temporary Access Platforms

Avalanche Protection

Capabilities:

Avalanche barriers and fences

Avalanche towers

Remote avalanche control systems

Snow avalanche protection systems

Snow netting

Basements & Foundations

Capabilities:

Capping Beams

Ground Anchors

Limited Access Drilling

Micro Piling

Mini Piling

Rock Bolting

Seismic Retrofit

Self Drilled Hollow Bar

Shotcrete

Soil Nails

Temporary Ground Anchors

Timber Pole Walls

Geohazard Mitigation

Capabilities:

Active Mesh Stabilisation

Debris Flow Barriers

Design and Build

Devegetation

Drill and Blast

Erosion Control

Geotechnical Inspection & Instrumentation

Rockfall Assessments and Investigation

Rockfall Attenuators

Rockfall Barriers

Rockfall Mesh Drapes

Rockfall Modelling

Scaling and Block Removal

Shallow Landslide Barriers

Ground Anchors

Capabilities:

Ground Anchor Inspection

Ground Anchor Lift Off Test

Permanent Multistrand Ground Anchors

Platipus Anchors

Post Grouted Ground Anchors

Pregrouted Ground Anchors DCP

Removable Ground Anchors

Restressable Ground Anchors

Self Drilled Hollow Bar Anchors

Temporary Multistrand Ground Anchors

Ground Support

Capabilities:

Active Mesh Stabilisation

Bulk Infil Grouting

Cable Bolts

Drill and Blast

Geotechnical Inspection & Instrumentation

Rockfall Assessments and Investigation

Highwall Stabilisation

Longwall Stabilisation

Portal Protection

Rock Bolting

Rockfall Barriers

Rockfall Mesh Drapes

Rockfall Modelling

Scaling and Block Removal

Retaining Structures

Capabilities:

Active Mesh Stabilisation

Design and Build

Drill and Blast

Geotechnical Inspection & Instrumentation

Rock Bolting

Rock Bolting

Rockfall Attenuators

Rockfall Barriers

Rockfall Mesh Drapes

Rockfall Modelling

Scaling and Block Removal

Rockfall Protection

Capabilities:

Active Mesh Stabilisation

Design and Build

Drill and Blast

Geotechnical Inspection & Instrumentation

Rock Bolting

Rock Bolting

Rockfall Attenuators

Rockfall Barriers

Rockfall Mesh Drapes

Rockfall Modelling

Scaling and Block Removal

Rope Access

Capabilities:

Emergency Response

Geotechnical Instrumentation

Supervised Inspections

Slope Stabilisation

Capabilities:

 

Active Mesh Stabilisation

Devegetation

Erosion Control

Ground Support

Retaining Walls

Rock Bolting

Scaling and Block Removal

Shotcrete

Soil Nails

Tunnelling

Capabilities:

 

Canopy Tubes

Ground Anchors

Injection Grouting

Portal Protection

Rock Bolting

Shotcrete

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