Portfolio – Geoinventions

New England Highway Upgrade – RSS Structure

geoinventions — Fri, 19 Jun 2020 05:10:49 +0000

Client: Roads and Maritime Services (RMS)

Main Contractor: Georgiou Group

Project Value: $80 million

The New England Highway is proposed to be upgraded at Bolivia Hill, located 57.0km north of Glen Innes, NSW. The upgrade of the 2.1km section of road is to include realignment of the highway to improve poor horizontal alignment and steep grades. The existing two-lane highway will be upgraded by construction of a 325m long new bridge and excavation into the existing cutting to widen and realign the highway.

The Georgiou Group (GG) has been awarded the construction contract and GG in-turn has engaged Geoinventions to aid with the reinforced soil structure (RSS) retaining wall design. A very temporary high retaining wall was required to provide construction access to Pier 1 and Pier 2 for the new bridge during the two year construction period. Due to the existing sloping topography, the design needed to incorporate very steep slopes in front of the retaining walls.

The 9.0m high RSS retaining wall consisted of a wrap around mesh facing which was faced with geotextile as it’s a temporary wall with a design life of two years. The units were ordered to have a facing angle of 80 degrees which would be supported with tow steel brackets. This provided a rigid face during the compaction process. The wall was reinforced using a 100kN/m geogrid reinforcement at 600mm vertical spacings.

Besides having to support construction loading from Trucks and Vehicles, Georgiou requested that the wall be designed to accommodate a 135T Crawler Crane situated 5.0m away from the wall face. This equated to a surcharge load of 250kPa while construction materials were lifted to the Pier locations.

Geoinventions conducted both stress based and strain based design to ensure stability of the RSS retaining wall. Furthermore, Geoinventions engineers assisted the construction team with the installation training and continual site inspections to ensure construction quality was as per our design.

The construction of the retaining wall was completed within two months during August and September 2018. The entire project is expected to be completed late 2020.

QR Toowoomba Range Slope Stabilisation

geoinventions — Mon, 15 Jun 2020 02:19:31 +0000

Client: Queensland Rail

Contractor: Doval Constructions (QLD) Ltd.

Project Value: $4 million

Queensland Rail (QR) undertook slope stabilisation works on two sections of the Helidon to Toowoomba railway. These sections were damaged during flood events over the last ten years and required long term stabilisation before slips could undermine the railway tracks. Long term stabilization techniques adopted ranged from a piled wall to anchored slopes with shotcrete and carefully placed rock revetments.

Geoinventions was engaged by Doval Constructions (QLD) Ltd to design the following temporary works:

Slope stability of benches and any slopes
Slope stability of deep excavations up to 6.25m during culvert replacements
Slope stability of material stockpile locations
Stability of access tracks near slopes
Temporary access track design
Piling platforms

During piling operations, Geoinventions provided a RPEQ experienced Geotechnical Piling Assessor with over 10 years experience to log, inspect and certify the piles according to MRTS63. Geoinventions additionally monitored all cut slope stability during construction and inspected placement of material at approved stockpile locations.

A critical part to the project was instrumentation of the slopes so any movement could be recorded during the construction process. Geoinventions developed the instrumentation and monitoring plan which included eight inclinometers, three tiltmeters and several survey markers. Monitoring results were provided to all stakeholders through a customised database developed by the in-house geotechnical team at Geoinventions which could be accessed at any time from any mobile device.

The project was completed safely and successfully in early June 2020.

Leanyer Sanderson Stabilisation Pond

geoinventions — Thu, 10 Oct 2019 00:55:20 +0000

Client: Power and Water

Contractor: BMD Constructions

Project Value: $15.40 million

Leanyer Sanderson Stabilisation Ponds treats 1.5m litre of wastewater everyday. The inlet facilities filter out large objects and pollution at beginning of the wastewater treatment process. The inlet upgrade works aims to improve the performance of the ponds, reducing the environmental impact and improve the treatment of odour at the site.

Goeinventions were engaged by BMD Constructions to provide the design and certification for the temporary retention and excavation for the new proposed waste stabilisation pond (WSP) inlet works at Leanyer wastewater treatment plant (WWTP). The proposed development is to construct a new inlet pipe and other associated infrastructure on an existing pond embankment. The excavation will be required to a maximum depth of approximately 4.8m below the current pond surface level.

To retain the old pond dam wall which consists of compacted clay sandy gravel fill and soft clay,m original geotechnical information indicated no groundwater ingress and better soil conditions, however during excavation, soil conditions indicated soft clay with leakage of water through the clay lined pond wall.

Geoinventions opted to design two sheet pile retaining wall to retaining the fill based on the current soil conditions and groundwater ingress experienced. Due to the depth of soft clay experienced, the design required 7.0m long L755 profile sheet piles installed at the pond wall crest. Another challenge experienced was the high intensity rainfall events which occurred during construction which increased the softening effects of the soft clay and increased pond water levels.

Due to the criticality of the project and varying conditions, Geoinventions managed project construction and design risk by having a full time experienced geotechnical engineer on site to coordinate the installation of sheet piles. Trigger levels and constant monitoring of the sheet pile wall following heavy rainfall events gave greater confidence to BMD and their clients.

The project was successfully completed without failure to the pond wall or risk to construction personnel.

Pihise Airport, Indonesia

geoinventions — Fri, 20 Sep 2019 04:33:40 +0000

Pihise Airport is located in Siau Island, approximately 155km North of Manado, North Sulawesi. The proposed project consists of 1.4km runway construction and another 1.8km extension for further future development. GCS was engaged as a geotechnical designer to provide a design for a proposed Terramesh® reinforced soil structure ranging between 31.5m to 35.5m in height (RSS). An additional 10.0m of fill embankment was placed above the structure at a slope angle of 1V:3H. Due to the extensive foundation excavation for the structure to achieve sufficient bearing capacity, the total supported slope height extended to approx. 52.0m in height with a 60° batter. Due to the extreme height, Paralink 300 high strength geogrid was required as soil reinforcement. Finite element and limit equilibrium analyses were performed to verify several critical design sections including a sensitivity check on key design parameters. A technical paper is being presented at the International Conference on “Landslides and Slope Stability” in Bali, Indonesia on 25 – 27th September 2019.

Toowoomba Rail Clearance

geoinventions — Fri, 20 Sep 2019 04:21:42 +0000

Client: BMD Constructions

Asset Owner: Queensland Rail

Project Value: ≅$48 million

The Darling Downs and South West Queensland Regions produces around a third of Queensland’s agricultural products and cotton. The Queensland Government invested $48 million to upgrade the railway along the Toowoomba and Little Liverpool Ranges.

The upgrade project involved lowering the entire railway including the railway within eleven heritage listed rail tunnels constructed in the 1860’s. The objective was to create enough clearance for a 9’6” high cube freight shipping container to be transported by rail. By achieving this, it would decrease the quantity of heavy vehicles required to transport freight on the highway from South West Queensland to the Port of Brisbane. This reduces overall transport costs, maintenance on road infrastructure and traffic accident risk. This rail upgrade would in turn enhance agricultural growth in the region and boost commercial benefit to farmers.

In addition to each heritage listed tunnel, consideration has been given to the condition of structures, access roads, existing cut slopes, design life, construction methodology, proposed track possession regimes and safety during construction.

In order to lower four tunnels in one rail shutdown, BMD Constructions engaged Geoinventions to provide high level excavatability/rippability assessment of rock for Tunnel 3, Tunnel 4, Tunnel 5 and Victoria Tunnel. Geoinventions classified the rock material into a number of categories and rock consisted predominantly of either Sandstone or Tuff. Geoinventions produced a geological long section profile along each tunnel alignment indicating excavatability difficulty which could be adopted on-site by the contractor. Both the Point load index (Is50) and defect spacings of the rock were analysed so easy ripping or hard digging could be identified prior to the rail closure.

All rock lowering within these four tunnels were conducted successfully in one rail shift using a surface miner with zero impact on the heritage listed structures.

Nerang Murwillumbah Road

geoinventions — Fri, 12 Jul 2019 01:21:18 +0000

Client: Doval Constructions

Project Value: $11 million

A large number of roads across the South Coast Region sustained significant damage as a result of Severe Tropical Cyclone Debbie in March 2017. The Nerang-Murwillumbah Road project required reconstruction due to a large slope failure following extreme weather events during the cyclone. The rehabilitation project was awarded to Doval Constructions which comprised of batter stabilisation works and a 144m long retaining wall. The permanent design included the installation of a debris catch fence up-slope and a long bored-pile retaining wall downslope to support the increased width of the carriageway and a drainage channel.

Geoinventions having significant range design experience was engaged by Doval Constructions to provide the temporary works design on this project. This included a steep excavation next to the existing road which was to remain open and relocated. A high risk temporary working platform which would be used for the construction of the bored pile retaining wall was designed to cater for two piling rigs operating simultaneously on steep slopes during the pile installation.

Geoinventions conducted slope stability assessments and bearing pressure calculations for the design of the working platforms. To ensure construction cost-effectiveness and reducing the use of quarry material, Geoinventions adopted on-site backfill material for temporary working platform construction. Due to the steep slope and high working loads, the working platform was reinforced with geogrid.

Geoinventions geotechnical engineers were engaged to manage the risk on site during construction, release construction hold points, witness soil nail installation and assist construction crew. Geoinventions having experienced on-site piling experience were also appointed as the Geotechnical Piling Assessor for verification of the bored piles according to DTMR standards.

The project was successfully completed successfully in June 2019.

Madsen Road Upgrade Works

geoinventions — Fri, 15 Feb 2019 05:22:29 +0000

Client: Fraser Coast Regional Council

Project Value: $3.4 million

Geoinventions Consulting Services Pty Ltd (GCS) was engaged by Fraser Coast Regional Council to provide a geotechnical design for the proposed Reinforced Soil Wall (RSW) required for the Madsen road upgrade project. This project involves the reconstruction of a 600m section of Madsen Road, Urraween from Morgan Circuit to south of Windsor Way. The purpose was to realign the existing road and allow for safer passage for motorists. Due to the height of the existing embankment and subsoil conditions, the project was deemed as a moderate risk to instability which GCS successfully addressed during the detailed design and construction phases of the wall.

The RSW system adopted for the build comprises of large precast interlocking concrete blocks with two various block sizes. The large modular blocks allowed for rapid installation was was reinforced with 160kN/m geogrid going back 9.5m at its highest point. The large blocks were selected for this project for both their structural properties and aesthetic appeal. Both AS4678:2002 and RMS R57 specifications were referenced for the design.

The RSW is approximately 125.0m in length and has a maximum wall height of 10.58m with a service life of 120 years. At the highest part of the wall, the foundation material beneath the footprint of the structure had to be removed and replaced with crushed rock due to the presence of soft incompetent soil. A 150mm concrete footing was cast over the crushed rock layer which was founded on XW Rock to provide a level foundation for the large blocks. To allow for construction equipment and future traffic loading, a 20kPa uniformly distributed load was applied to the back of the wall.

GCS completed the retaining wall design on schedule and assisted both the principal contractor SGQ and Fraser Coast Regional Council during the construction phase to deliver the retaining wall as per the design. The entire project was delivered on time and within the project budget.

Services Geoinventions provided include:

Provision of RSW design for the proposed high retaining wall.
Verification of foundation material including foundation treatment.
Regular site inspections to ensure the construction is in accordance with design requirements.

Teddington Weir Water Treatment Plant

geoinventions — Wed, 13 Feb 2019 06:52:43 +0000

Client: Fraser Coast Council

Contractor: BMD Constructions

The Teddington Weir water treatment plant is located on the banks of the Tinana Creek and provides clean drinking water to the town of Maryborough which is situated 210km North of Brisbane.

Geoinventions Consulting Services Pty Ltd (GCS) were engaged by BMD Constructions during the tender stage to assist with design optimization of the current design proposed by the original principal consultant. After thorough review of the geotechnical conditions, GCS proposed three alternative options which would make the construction of the intake pump station easier, safer and more cost effective. One of these methods were proposed as an alternative tender, and together with other industry “smarts” created a successful bid.

GCS was also engaged during the construction phase of the project for the following designs:

Slope stability calculation of the earth dam wall situated between the river and deep excavation.
Design optimization of surface protection during the deep excavation.
Design of temporary sheet pile wall during construction of staircase to access the pump station.

GCS provided value on the design optimization for slope protection around the deep excavation as can be seen from the photos above. GCS geotechnical engineers inspected the current slope to confirm insitu conditions and design geometry. From the site inspection, temporary surface protection to prevent rockfalls within the work area below was required. Extremely weathered to moderately weathered sandstone cut slopes ranged between 10.0m and 7.0m on either side of the work area. The principal designer had nominated reinforced shotcrete on the earth dam and side slopes which would have increased the construction schedule and added additional expenditure to the project. Based on GCS experience with slope stabilization, GCS nominated the slopes be protected with Macmat-R which combines high strength rockfall mesh with a turf reinforcement mat. This provides protection from rock falls 600mm in diameter or smaller from impacting workers below. This protection method was cheaper and easier to install and provides instant protection to the work area below.

The project was successfully completed within the timeframe with the cost effective alternative solutions provided by Geoinventions. All project Key Performance Indexes (KPIs) were achieved with Zero Injury Loss Time.

Culvert Replacement at Mt Samson Road, Samsonvale

geoinventions — Wed, 13 Feb 2019 06:37:59 +0000

Client: Moreton Bay Regional Council
Contractor: Doval Constructions

Moreton Bay Regional Council had to undertake some urgent road and drainage repair along Mount Samson Road,
Samsonvale QLD due to the localised settlement caused by an existing deteriorated steel corrugated pipe. The
newly proposed stormwater culvert system was approximately 30.0m long and 9.7m below the top of the road
embankment. The scope of this project involved soil investigation, bulk earthworks, new larger stormwater culvert
drainage system and reinstatement of road.
Geoinventions Consulting Services (GCS) were engaged by Doval Constructions Pty Ltd, to provide the shoring box
assessment during temporary excavation, temporary slope stability design and design of the Reinforced Soil
Structure (RSS) for the upstream embankment. The temporary retention for 9.7m of soil involved installing a 5.0m
high shoring box for vertical cut and the remaining 4.7m depth cut to 60 degrees. The 60 degree temporary slope
protection was secured with Combigrid 40/40 with N20 reinforcing pins. This reduced the footprint for the existing
road removal and minimised the volume of excavation. Doval and GCS managed to reuse all the existing material
as part of the backfill although minimal import was necessary.
The reinforced embankment design adopted ACETex® Pet Woven Geotextile with a Macmat®R turf reinforcement
mat to ensure revegetation. This allowed for the reinforced embankment to be constructed as efficiently as
possible to reopen the road as quickly as possible and also saved construction time and cost as it is costly and
timely effective than other engineering methodologies. This project has been completed one (1) week earlier than
the project timeline.
The services Geoinventions provided included:
– Stability assessment for the excavation and lateral capacity of the proposed shoring boxes under the
surcharge load from the excavator and crane operation.
– A reinforced upstream embankment design.
– Provision of construction staging drawings.
– Analysis and selection of new concrete pipes and fill in bed, haunch and side zone.
– Site inspections.
Construction commenced in 29/10/2018 and was completed 07/12/2018 ahead of schedule.

Combabula Gas Processing Facility

geoinventions — Thu, 29 Nov 2018 05:30:27 +0000

Client: BMD Constructions

Project Value: $29 million

The Combaula site is part of the Australian Pacific LNG’s gas processing facilities project. The plants will be processing the raw natural gas from the gas fields for delivery to domestic and global market. The site is located approximately 45km north of Yuleba, Southwest Queensland.

Geoinventions Consulting Services Pty Ltd (GCS) were contacted by BMD Constructions with an intention to review the current internal road pavement designs for the Combabula Gas Processing Facility. This is the primary access road linking Horse Creek Road to the Gas Plant Facility for the APLNG development area.

GCS conducted several geogrid reinforced pavement designs in accordance with the AASHTO Guide for Design of Pavement Structures 1993. This design concept was adopted in localised “soft spot” areas to improve subgrade strength. GCS also reviewed current geotechnical information, conducted new on-site tests and established a new geotechnical data set for the pavement design optimisation.

The geotechnical data set comprises of longitudinal soil profiles, CBR long section profiles and an Atterberg Limit test result summary chart. GCS conducted a thorough review of the laboratory test results, reinterpreted the CBR strengths and categorised the subgrade into four subgrade strengths. This optimised the pavement design by allowing the client to construct different pavement types depending on four subgrade strengths.

Other services GCS provided include:

Further geotechnical investigations by GCS qualified geotechnical engineer and field testings to validate the reinterpreted CBR strength.
Utilise onsite material for pavement design which provided significant material savings and reduced the overall construction timeframe.

This resulted in significant cost savings of more than $1 million dollars and reduced the construction timeframe on internal roads considerably.

Beckett and Hamilton Road Intersection Upgrade

geoinventions — Wed, 17 Oct 2018 01:26:31 +0000

The intersection at Beckett Road and Hamilton Road is currently operating at capacity with significant delays experienced during peak hours. Brisbane Council upgraded the intersection by widening Hamilton Road and providing additional lanes to some sections of Beckett Road. This project involved designing a ≅100m long retaining wall on the South-East corner of the intersection on Hamilton Rd to accommodate the road widening.

Geoinventions Consulting Services (GCS) were engaged by HDR Engineering to provide the geotechnical design of a bored pile retaining wall system. The maximum retained height is approximately 2.8m and the design life of the retaining wall will be 120 years in accordance with the standard AS4678-2002 Earth-Retaining structure. As the neighbouring properties along Hamilton Rd are in close proximity to the proposed construction site, the space for constructing conventional retaining walls was insufficient. The bored pile retaining wall design required a minimal construction footprint to retain the existing soil, reduced the amount of excavation and negated the need for imported fill.

Geoinventions were additionally contracted by Doval Constructions Pty Ltd to design the working platforms for the piling rig and conduct the geotechnical assessment of the bored piles.

The services Geoinventions provided included:

Temporary vertical cut assessment during the construction
Design of bored pile retaining wall with shotcrete infill
Design of temporary working platforms
Construction staging drawings
On-site geotechnical piling assessor

Construction commenced in mid February 2018 and was completed July 2018 ahead of schedule.

International Conference on Geotechnics

geoinventions — Thu, 09 Aug 2018 01:47:21 +0000

Geoinventions is proud to be part of the “International Conference on Geotechnics” in Yogyakarta, Indonesia. The conference was a great example of collaboration between international universities, contracting companies, and consulting companies. The presentations focused on Sustainable Development Challenges in Geotechnics, and Geoinventions was represented with an invited keynote speaker, a guest in the soft soils discussion session, and two submitted papers. These covered the topics of risk assessment and reliability analysis for better business outcomes, mitigating liquefaction by rapid impact compaction, and 3D assessment of rainfall induced slope failures.

Portside East Development

geoinventions — Wed, 21 Mar 2018 01:56:17 +0000

Client: Global Synthetics Pty Ltd

Contractor: Mainland Civil Pty Ltd

Developer: Brookfield Residential Properties

Project Value: $140 million

The Gallery House development at Portside East is a luxurious apartment project in Hamilton, Queensland. The project features a 19 and 20 storey building with approximate 169 apartments and 1100mᒾ retail space. It is constructed along the riverfront in Hamilton. The building will offer a convenience of easy access to the inner city and stylish waterfront living.

Global Synthetics engaged Geoinventions Consulting Services (GCS) to assess and provide design certification of the proposed Temporary Working Platforms (TWPs) for the piling operations. The scope was to design a sufficiently thick working platform to prevent any punching or bearing failures during the piling operations.

As the construction site is adjacent to the Brisbane River, the existing loose to medium dense sand subgrade did not have the required bearing capacity to withstand the proposed 370kPa piling pressures exhibited during operations. In order to achieve the required bearing capacity, GCS designed a platform using a combination of Combigrid® 40/40 geocomposite and Secugrid® 40/40 geogrid. The geogrid component in Combigrid® provides reinforcement whilst the integrated geotextile component provides a positive separation and filtration function. The Combigrid® geocomposite was placed on top of the weak subgrade and the Secugrid® geogrid layer was placed midway between the 800mm thick platform.

By using a geocomposite, GCS provided value engineering by reducing the thickness of the platform compared to conventional working platform designs commonly provided in the industry. This provided material savings and reduced the overall construction timeframe for the construction of these platforms. By using reconstituted Type 2.3 material for the platform reinforce fill, GCS also reduced the need for utilizing processed quarry material and additional transport which further reduced the carbon footprint of this project.

GCS provided the following additional Geotechnical services on the project:

Construction staging drawings and instructions for efficient construction procedure.
Experienced on-site geotechnical engineer to inspect platforms and validate the design prior to piling.
Extension of working platform for access track during travelling.

Geoinventions Xmas Party 2017

geoinventions — Fri, 12 Jan 2018 06:07:38 +0000

Geoinventions just had our 70s themed Christmas party on the 1st Dec. It was a fun night with our families and friends gathering together to celebrate this festive season. We have come through a year that was filled with challenges and accomplishments and glad we stuck together as a team. Geoinventions are proud to have such excellent staff and we deeply appreciate your dedication throughout the year. We wish our clients, staff and their families a Merry Christmas and look forward to the new year!

Bruce Highway Bridge Upgrade

geoinventions — Wed, 16 Aug 2017 06:33:29 +0000

Bruce Highway Bridge Upgrade

Location: Cattle & Frances Creek, QLD, Australia

Geoinventions Consulting Services Pty Ltd (GCS) were contacted by BMD Constructions Pty Ltd (BMD) to provide design and assessment of the temporary working platforms and slope stability assessment for the Cattle and Frances Creek Bruce Highway upgrade. This project involves an upgrade of a 5.8km section of the Bruce Highway and replacement of the two bridges crossing Cattle and Frances creeks. The new bridges are to be 41m (two spans) and 644m long (28 spans) respectively.

Soft ground was encountered at the site which necessitated temporary working platforms prior to piling operations, which comprised of driven precast octagonal piles. GCS conducted design assessment of the temporary working platforms to ensure sufficient ground bearing capacity for the proposed machinery. Platforms were required to accommodate the critical design load cases from piling rig and crane operations, which were up to 295kPa over a 900mm machine track width. GCS adopted an efficient and detailed design methodology to minimise the required platform thickness. A minimum platform thickness of 500mm was specified, and utilised locally sourced materials. This approach is cost effective and environmentally friendly, by using a reduced material volume and reduced emissions produced from material removal and transport. This optimised solution also reduces timeframe for the platform construction. In total, the platform construction and piling operations were conducted over a five month period.

The entire project is expected to be completed in late 2018. Upon completion, the new raised highway will ensure Hinchinbrook Shire residents have a safer and reliable road during flood and provide residents better access to employment and health services. The upgrade will also provide a better freight connectivity between Brisbane and Cairns.

Geoinventions Getaway & Conference

geoinventions — Wed, 09 Aug 2017 04:22:34 +0000

Geoinventions Conference & Getaway

Geoinventions arranged a great getaway weekend for our team and their families to the Royal Pines Resort on the 29-30 July. A small Saturday conference was held with our team to establish new goals and outcomes for the next 5 years together with possible improvements for our growing business. A mediator with great business experience in Australasia was invited to join our team to share his valuable insight and strategies for continued growth. The conference was extremely productive with valuable input from all our team members. We are all motivated to achieve new goals through close client collaboration and teamwork. A teambuilding event was held on Sunday which provided a chance for our families to mingle and get to know each other. Interesting games were provided which provided much entertainment with lots of laughter. Can’t wait for our next conference to be held next year

Panorama Drive, Yeppoon, Australia

geoinventions — Wed, 02 Aug 2017 05:42:11 +0000

Location: Panorama Drive, Yeppoon, Australia

Geoinventions Consulting Services (GCS) were contacted by JRT Civil to provide a optimized engineering design for cut face stabilisation works at Panorama Drive, Yeppoon, Queensland.

Livingstone Shire Council is upgrading the existing shire road system by the construction of Panorama Drive-Segment 2 as the proposed northern strategic link. It is approximately 3.4km in length and extends from Crannys Road, Adelaide Park to Laceys Road in Pacific Heights. Panorama Drive will serve as a key transport link to directly connect the northern suburbs of Yeppoon with resource nodes, mines and airports and offers as an alternative route for tourists and residents during traffic congestion or natural disaster on current Farnborough road.

The new road alignment will be formed by using large cut and fill earthworks.

The project site is underlain by the Late Devonian to Early Carboniferous age Wandilla Formation, comprising interbedded argillite, chert, greywacke, siltstone, jasper, slate and rare schist. Cut faces varied between residual soil and extremely weathered rock based site investigations and onsite mapping conducted by GCS. Several significant geological features in the forms of dykes and altered zones were found in the cut faces which required specific detailed design and stabilization methods.

Four major cuts were identified as part of the bulk earthworks and the largest cut had a maximum slope height of 15.8m with a 76 degrees facing angle. To stabilize these very high sections, GCS designed a soil nailing solution with a shotcrete facing to provide the required design life of 50 years.

GCS adopted a Tecco rockfall netting drapery system for one of the cut slopes which consisted of some medium strength rock. The Tecco rockfall netting contains and controls the possible dislodgement of rocks from the fragmented cut face thereby protecting road users from falling debris.

The construction works for Segment 2 Panorama Drive was completed in September 2017 ahead of schedule.