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Julius Berger’s piling and geotechnical services

Offshore / onshore soil investigations

Pile driving

Bored piling works

Construction pits

Wall and slope engineering

Well drilling

Testing and monitoring

Julius Berger offers piling and geotechnical engineering services for projects of varying scope and complexity to clients within the Julius Berger group as well as to third parties. The scope of services includes soil investigation, soil improvement, pile driving, bored piling works, wall and slope engineering as well as water well drilling.

Highly specialized engineers and skilled staff apply up-to-date technology, strong logistic capabilities and experience-based knowhow to investigate even the most extreme soil conditions and provide suitable solutions to meet individual project needs.

With extensive experience in Nigeria, the company’s piling and geotechnical specialists are experts in executing complex works for building, infrastructure and industrial construction projects, for both public and private clients.

“Julius Berger offers clients quality solutions for special foundation engineering works”

Piling & Geotechnical Specialists

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DrillingDry drilling, hammer drilling, wireline coring, hollow auger drilling, inclinometer drilling, extensometer

SamplingDisturbed and undisturbed samples, hammer cores in PVC liner, environmental testing, hard rock sampling with coring

SoundingDynamic Probing Light (DPL), Dynamic Probing Heavy (DPH), Cone Penetration Tests (CPT), Standard Penetration Tests (SPT), settlement testing, compaction testing, slump tests

Julius Berger has the capacity to provide in-depth soil investi-gation including both surface and subsurface exploration, utilizing a variety of specialized approaches.

Geotechnical investigation to obtain information on the physical properties of rock, soil and subsoil prior to execution of works is a critical component to the success of every construction project.

Exploring the underground of a construction site allows the assessment of the subsoil conditions and informs earthwork and foundation design for proposed new structures or repair of distressed structures.

Laboratory testing

Soil classification (USCS)

Sieve analyses of soil samples

Water quality analyses and moisture content tests

Specific gravity and relative density tests

Hydrometer test

Atterberg limits test

Soil Investigation

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Technical specifications Diameter:

400 mm - 3,000 mm (piles)

400 mm - 1,000 mm (CFA)

Pile length:

max. 47.50 m (piles)

max. 28 m (CFA)

Usage Applied vertically, declined, inclined,

onshore and offshore

Foundation for bridges and buildings

Support of port facilities and construction pit structures

Anchoring systems

To provide foundation support for buildings and other structures, Julius Berger offers a range of displacement piling methods.

Based on individual project requirements, pile driving methods such as vibrating, impact driving and pressing are implemented to install foundation elements by an experienced project team that selects the solution required for the project scope.

Types of displacement piles

Cast-in-situ driven piles

Pre-cast concrete piles

Steel pipes/profiles

Steel sheet piles

Pre-cast concrete sheet piles

Continuous flight auger (CFA) piles

Displacement-injected piles

Displacement Piling

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Technical specifications Diameter:

600 mm - 2,000 mm (cased)

600 mm - 3,000 mm (uncased)

Pile length:

max. 60 m (cased)

max. 92 m (uncased)

Usage Applied vertically, inclined, onshore

and offshore

Foundation for bridges and buildings

Support of port facilities and construction pit structures

Applicable across various soil types

Replacement piling methods support structures with high structural loads such as retaining walls, foundations of multi-storey buildings or watertight excavation pits. Even under difficult soil conditions, the rotary drilling techniques applied by Julius Berger deliver high performance rates through customizable drilling tools that penetrate obstacles like reinforced concrete, steel or wood.

The result is an opportunity for high performance deep foundation solutions, applicable for a wide range of soil types and suitable for restrictive work environments.

Types of replacement piles

Bored piles: cased rotary drilling with Kelly-System

Bored piles: cased/uncased and slurry-supported rotary drilling with Kelly-System

Large diameter piles by grab excavation

Replacement Piling

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Retaining systems

Soil nails with or without shotcrete application

Sheet piles

Bored pile walls: tangential, intermittent with intermediate infill, secant

Diaphragm wall

Especially in urban areas, superstructures are often planned with underground floors or carparks and a minimum clear distance to neighbouring structures.

In order to secure a construction pit or slope from collapsing, as well as to protect adjacent structures from possible negative impact, Julius Berger offers wall and slope engineering to implement sufficient retaining systems. Retaining systems are also required for grounds with poor soil properties or high groundwater tables and for quay walls, to resist heavy impact loads and chemical attack.

“Julius Berger plans and supplies high performing retaining systems”

Wall and Slope Engineering

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Reverse rotary drilling Diameter: max. 1,000 mm

Depth: max. 1,000 m

Direct mud circulation drilling Diameter: max. 400 mm

Depth: max. 400 m

Down-the-Hole (DTH) hammer drilling Diameter: max. 254 mm

Depth: max. 200 m

Dry drilling Diameter: max. 168 mm

Depth: max. 200 m

Julius Berger’s piling and geotechnical specialists are experts in drilling highly productive wells for town and infrastructure water supply projects, including aquifer separations with a proprietary method. In addition, exploration drillings with continuous coring for mineral prospecting is available.

Julius Berger offers holistic well drilling solutions, such as geotechnical measurements to define the ideal location for a water well, design based on international standards, material procurement, manufacturing and installation.

Usage of wells

Groundwater level measurement

Artificial groundwater recharge wells

Exploration core drillings for minerals

Dewatering wells

Regeneration and rehabilitation of existing wells

Well Drilling

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Load bearing tests Axial static load tests: dead loads,

anchor heads, reaction piles, Osterberg cells

Lateral static load tests

High strain dynamic tests

Integrity tests Low strain integrity tests

Cross hole sonic tests

Ultrasonic inspections

Julius Berger conducts advanced testing and monitoring methods that comply with international and domestic standards.

For optimization and quality assurance of special deep foundation works, pile tests are performed for the evaluation and/or verification of load bearing capacity in relation to the settlement behaviour of a pile. The tests are evaluated to enhance foundation design and/or after pile production for the confirmation of design assumptions.

“State-of-the-art methods ensure compliance with international geo-measurement standards”

Testing and Monitoring

Key Projects

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For the construction of a cable-stayed bridge, Julius Berger’s piling and geotechnical scope included the foundation of the ramps, the foreshore bridges and the main pylon, as well as testing and monitoring of the special deep foundations works.

Method:

Displacement piling and bored piling, onshore and offshore

531 driven steel piles

Pile diameter: 914 mm

Pile length: up to 45 m

39 bored piles

Pile diameter: 1,524 mm

Pile length: up to 76 m

Equipment:

Liebherr HS 895HD with fixed leader LRH 600 and impacthammer IHC-S150

Liebherr HS 875HD

Manitowoc 4100 SII

Vibro-hammer Müller MS 200 HHF

Lekki-Ikoyi Link Bridge, Lagos

”The challenge of driving 76 m long piles into 18 m deep water in a highly demanding marine environment was mastered by skilled experts using quality equipment”

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During the construction of a multi-functional stadium complex, Julius Berger’s piling and geotechnical specialists were responsible for the pile foundation of the grandstands.

Method:

Displacement piling

375 CFA piles

Pile diameter: 780 mm

Pile length: up to 21 m

779 precast reinforced concrete piles

Pile dimensions: 350 x 350 mm

Pile length: up to 18 m

Equipment:

Liebherr LRB 255

Fundex F14

Akwa Ibom Stadium Complex, Uyo

“To deliver on the range of required foundation loads for the stadium, several pile types were customized and executed in quick time”

For two large-scale drainage projects, Julius Berger’s piling and geotechnical specialists created the start and finishing shafts, through usage of closed pipe-jacking technology.

Method:

Kelly-drilled secant pile wall

50 bored piles

Pile diameter: 880 mm

Pile length: up to 24 m

Equipment:

Liebherr LRB 255

Trenchless Discharge Drain, Uyo

“The establishment of secant pile walls enabled the construction of a pioneer drainage project, utilizing pipe-jacking technology”

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For the construction of a 100 m high-rise building, Julius Berger’s geotechnical scope included the production of a watertight construction pit and horizontal jet grouting layer as a water barrier.

Method:

Kelly-drilled secant pile wall, bored piling

205 bored piles

Pile diameter: 1,500 mm

Pile length: up to 63 m

Equipment:

Liebherr LB28 (secant pile wall)

Liebherr HS 855 (grab excavation)

Central Bank of Nigeria, Lagos

“Working in the center of a densely populated megacity required utilization of state-of-the-art low noise and vibration piling methods”

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“To meet the immediate need for new jetty construction, a king-pile wall with inter-mediate sheet pile walls was effectively installed”

Julius Berger’s geotechnical scope of a jetty construction at Warri Port involved the construction of a combined sheet pile wall in form of a king-pile wall (HZ-Profiles) with intermediate sheet pile walls (AZ-Profiles), anchored with a sheet pile wall.

Method:

HZ-King piling and intermediate piling, offshore; installation of an anchor wall, onshore; complete steel construction works connecting the main wall with the anchor wall

250 HZ piles

Pile dimensions: HZM 880 / HZM 1080

Pile length: up to 28 m

Jetty length: 510 m

Equipment:

Liebherr HS855HD and HS875HD

Vibro-hammer ICE 815

Jetty Construction, Warri Port

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Key Equipment

“Modern equipment is available to offer clients the complete range of piling and geotechnical solutions”

Drilling rig Liebherr LB 44

Operating weight: 173 t

Max. torque: 510 kNm

Engine output: 505 kW

Max. drilling depth: 92 m

Max. drilling diameter cased/uncased: 2.5 m/3.0 m

Drilling rig Nordmeyer DSB 3/30

Operating weight: 28 t

Max. torque: 30 kNm

Engine output: 205 kW

Max. drilling depth: 700 m

Max. drilling diameter cased/uncased: 0.4 m/1.1 m

Drilling rig Liebherr LRB 255

Operating weight: 115 t

Max. torque: 250 kNm

Engine output: 670 kW

Max. drilling depth: 28 m

Max. drilling diameter cased/uncased: 1.8 m/2.2 m

Key Equipment

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“All equipment is maintained by in-house mechanics according to manufacturers’ guidelines”

CPT-measuring system Shark

Max. technical operational water depth: 25 m

Max. thrust force (CPT rams): 200 kN/pull 250 kN

Sounding rods: 36 mm

Sounding casing: 55 mm

Transportation weight: 26 t

Self-elevating platform “Ilse”

Length over all: 40 m

Width: 20 m

Pontoon depth: 3 m

Allowable deck load: 650 t

Crawler crane Liebherr HS 895 + LRH 600

Operating weight: 172 t

Max. boom length: 84 m

Max. fixed leader length: 50 m

Max. swinging leader length: 60 m

Max. capacity: 65 t

Key Equipment

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Contact

For more information on Julius Berger‘s geotechnical and piling services contact:

Julius Berger Piling & Geotechnical Specialists

10 Shettima A. Munguno Crescent

Utako 900 108 | Abuja FCT

Phone: +234 803 906 7000

Email: pgs@julius-berger.com

www.julius-berger.com

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