In-SITU COMPACTION

A large industrial compactor with massive dual cylindrical rollers in the front. The machine has a cabin at the back, and the rollers are coated with dirt, suggesting recent use. The background is a plain white.

Innovative quality, from start to finish. 

In-situ compaction refers to the improvement and stabilisation of existing base materials onsite, rather than importing external soil. This requires thorough analysis and suitable equipment to get effective results.

Some in-situ soils are too loose in their natural state to facilitate construction on the site within acceptable settlement tolerances. This is addressed by increasing the soil density with in-situ compaction of the natural ground strata to achieve the required strength and stiffness. 

Landpac’s in-situ compaction capabilities with HEIC

Rock Fills

High Energy Impact Compaction (HEIC) compacts rock fills through ‘rubblisation’ of  in-situ materials. In other words, breaking down large rocks into smaller particles with the use of dynamic compaction applications.

Three images of a rocky landscape show varying perspectives. The first image highlights a heap of large rocks, the second shows a layered terrain with soil and stones, and the third presents a close-up of rough gravel. Trees are visible in the background.

Mixed Fills

HEIC significantly benefits mixed fills in mine rehabilitation, infrastructure projects, stacker/reclaimer alignments, and mine haul roads, boosting uniformity, stability, and quality for improved construction efficiency and cost savings.

A construction site map overlay on a background showing excavators and dirt. The map highlights different areas with labels such as "PLT General Fill" and "PLT Rock," along with coordinates and measurements.

Shingle/ Rock

In-situ compaction reduces the need for removal and resurfacing of shingle/rocks from construction and mining sites as it reduces particle sizes over the course of multiple applications.
Before / After 25 surface passes
Left side shows a close-up of a pile of gray and beige rocks of various sizes. Right side displays a patch of flat, rocky ground with tire tracks and scattered small stones. Both images convey a rugged, natural texture.

Sands

In-situ compaction reduces the need for removal and resurfacing of shingle/rocks from construction and mining sites as it reduces particle sizes over the course of multiple applications.

Pre and post sand reclamation CPT results to 18 feet

A graph displays QC (MPa) on the x-axis and Depth (meters) on the y-axis. Three colored lines represent data for Pre C, CPT, and Cone. The background shows a waterfront construction site.

Sandy Clays

Landpac’s in-situ High Energy Impact Compaction (HEIC) offers a targeted solution to the unique challenges of sandy clay compaction in construction, significantly enhancing soil stability and load-bearing capacity directly at the construction site.

HEIC = > Elastic moduli

A scatter plot showing SMDD% on the vertical axis and +/- OMC% on the horizontal axis. Dots are distributed across the graph, with values ranging from -7% to 5% on the OMC% axis and 86% to 106% on the SMDD% axis.

Saturated Alluvial Soils

High Energy Impact Compaction (HEIC) provides significant benefits for saturated alluvial soils, enhancing their stability, consolidation, and overall performance.

A chart showing cone resistance and pore pressure alongside images of construction equipment: a tractor with attachments on a dirt road and a site with machinery and ground stabilization work, labeled with "Impact Compaction Zone" and "Wick Drain & Surcharge Zone.
Cone Penetration Test –
Location 1 before and after
Graph titled "Bermuda St DAC Trial - Location 1" showing core resistance and pore pressure data over various stages. Multiple colored lines, a grid, and labels displaying measurement units. Background shows an industrial area with construction elements.

Liquification Mitigation

Field trials confirmed:

  • Liquification induced free field settlements in the upper 3m were reduced 40% to 90%
  • Liquefiable layers tended to be located generally within the upper 3m of the soil profile
  • The geotechnical investigation identified the site is predominantly beach and dune sand
Graph showing two plots labeled "QC (BPM)," each with blue and black lines. The x-axis is labeled with a range from 10 to 30, and the y-axis displays values between 2.4 and 3.6. Construction equipment is visible in the background.

Contaminated sites

  • HEIC is able to confine asbestos and other pollutants in-situ, eliminating environmental concerns related to material loading, transportation, and disposal.
  • Significant time and cost savings, exceptional efficiency, and a greener alternative to excavation, export, import, and 300mm layer compaction
  • Reduces carbon footprint and minimises exposure of hazardous materials to both people and the atmosphere
A yellow construction vehicle with tracks is compacting the ground at a site. It has a large steel roller attached at the rear. The background shows a dirt slope and blue sky.

Interested in the potential of High
Energy Impact Compaction for your site?

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What our 
clients say

“We’ve worked with Landpac on about 140 successful projects, for a wide variety of clients, in most Australian states and in New Zealand, China, Malaysia and Fiji. Working with them using HEIC, compaction can be achieved over a much wider range of soil moisture than can be achieved with conventional compaction, with a considerable cost saving.”

George Black, BLACK GEOTECHNICAL
"The operators and supervisors from Landpac demonstrated their professionalism and wealth of knowledge on the HEIC process. Working to deliver the required results within the contracted timeframe."

Dominic Wallace, Ford Civil
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“The Landpac team have been the solution to reducing the settlement risks on many uncontrolled and/or deep fill development sites I’ve advised on; their measuring and monitoring technology provides reliable data I need as a geotechnical advisor to better understand the ground and treatment outcomes achieved.”

Andrew Middleton, Core Consultants Pty Ltd
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"The Visy project was the second project I have worked with Matt and the Landpac crew on, at the Port of Brisbane. On both occasions, they have been fantastic to deal with and always willing to go above and beyond to help create the outcomes needed. I look forward to working with Matt and the Landpac team again in the future."

Adam Tapper, McNab Relationship Builders
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