Aveng Ground Engineering Profile
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1 Aveng Ground Engineering Profile
2 Contents Overview 1 2 Piling 2 Renewable Energy 6 Lateral Support 8 Grouting 10 Geotechnical investigations 12 Flagship projects 12 Contact us 12 Visit our website for more information about our group capabilities and global project portfolio. Overview Aveng Ground Engineering is a geotechnical contractor based out of Johannesburg that has serviced the South African geotechnical market with distinction for over 45 years. The company s major focus is on piling, grouting and lateral support with a small division involved in geotechnical investigations to assist consulting engineers and clients in project planning. Formed in 1970 by Ross Parry Davis, then Ground Engineering and Piling Limited was purchased by LTA, the construction division of Aveng in Aveng Ground Engineering, in executing some of the largest and most challenging projects in South African history, has proved itself to be at the forefront of technology, quality and safety in all spheres of foundation works and improvement. Section 1 Overview 1
3 Screw-in Cased Auger Piles Piling Open Hole Auger Piling Auger piling is the most cost effective method of installing piles and is suited to stable dry ground conditions where bedrock is at a depth allowing pile loads to be carried in side friction and end bearing. In addition, auger piling also provides the largest variety in load bearing capabilities making it the first solution considered for any piling job. Sizes range from 400mm up to 1800mm (up to kN), with a maximum depth of 70m and can be installed up to an inclination of 1:6. Screw-In Cased Auger Piling (SICAP) SICAP takes the benefits of auger piling and applies them to collapsible and water logged conditions. Used specifically in bridges to allow large load-bearing piles to be installed, the casings are installed using the power of the modern hydraulic rig s rotation drive unit. Sizes range from 750mm to 1050mm (up to 7 000kN), with a maximum depth of 30m and can be installed up to an inclination of 1:6. Oscillator Piles Traditional bridge piles, the oscillator pile is used in conditions where SICAP is not feasible (ie great depths or extremely hard in situ rock). The oscillator is an additional unit attached to the modern hydraulic piling rig that can generate up to 150 ton torque. Sizes range from 900mm to 1200mm (up to 9 000kN), with a maximum depth of 50m and can be installed up to an inclination of 1:6. Concrete Instrumented Continuous Flight Auger (CFA) Piles Aveng Ground Engineering is the South African industry leader in concrete instrumented CFA piles. The modern technology allows the installation of the CFA pile while eliminating the drawbacks of costly grout and limited quality control. Concrete instrumented CFA piles are best suited to collapsible geotechnical conditions and sites where the pile load will be carried in side friction as opposed to end bearing. An additional advantage to concrete instrumented CFA piles is that the modern hydraulic piling rigs used have the capability to auger through limited boulder layers and provide a small pile socket, both of which preclude crane installed grout CFAs. Sizes range from 500mm to 900mm (up to 3 750kN) with a maximum depth of 19m. Concrete CFA piles can only be installed vertically Full Displacement Auger Piles (FDP) Full displacement auger piles are a modern piling method imported by Aveng Ground Engineering from Europe. FDP can be installed in soft sandy material with the benefits of increased skin friction and toe resistance due to material compaction, providing a more economical pile design (shorter piles, smaller diameters, less steel consumption) with low-vibration drilling, high daily productions and greatly reduced piling spoil. Sizes range from 410mm to 620mm with a maximum depth of 19m. Similar to Concrete CFA piles, FDP Piles can only be installed vertically. CFA Piling 2 Oscillator Piles 3
4 Self drilling Anchor Piles (SDA) CAPWAP Dynamic Pile Testing Percussion Piles Self-Drilling Anchor Piles (Sappi/Klein Windhoek) Aveng Ground Engineering is in the unique position, through our affiliation with Aveng Duraset, to provide the most cost effective solution for self-drilling anchor piles. These piles are installed by means of a hydraulic drill rig using grout flush and are most suited to limited access areas that have collapsible conditions and shallow bedrock. Self-drilling anchor piles are usually installed in pile groups of at least three to counteract slenderness. Sizes range from 76mm to 130mm (up to 800kN) with a maximum depth of 20m and can be raked in certain instances. Percussion Micro Piles (Longlake/Women s Heritage Monument) Percussion micro piles are installed using a down-the-hole hammer to allow installation of small diameter piles through hard material. Aveng Ground Engineering is in the unique position of being able to install piles up to a 350mm diameter (500kN) in 2.5m headroom, which has been very useful in renovations of existing buildings. Sizes range from 125mm to 400mm (up to 1 000kN) with a maximum depth of 30m and can be raked in certain instances. Precast Piling Aveng Ground Engineering owns the most advanced precast piling equipment in South Africa, positioning us perfectly to tackle any large scale projects. Precast piling is best suited to areas with very soft, collapsible geotechnical conditions and very deep bedrock. Precast piling has the advantage of high quality standards due to the precast nature of the piles, and time benefits due to the high speeds of installation. Sizes range from 250mm square to 350mm square (up to 2 000kN) with an unlimited maximum depth and can be installed to a maximum rake of 1:10 Pile load tests Static pile load test British method static pile load up to a maximum load of 1000 tons. Dynamic pile load test Faster and cheaper than static load tests, Case pile wave analysis programme (CAPWAP) determines static soil resistance and simulates a static load test. A five ton weight is dropped a specific height to replicate the pile load required and independent testing contractors utilise the CAPWAP equipment to calculate static shaft resistance, end bearing, stresses at any point along the shaft and energy transferred from the weight to the foundation. Results are sent for analysis to a United Kingdom based firm where equivalent static pile load test results are derived and predictions regarding the load settlement behaviour of the tested foundation are provided. Open hole Auger Piles 4 Maximum effective load of up to 400 tons and maximum pile size of 900mm diameter. 5
5 PV Solar Post driving Renewable Energy CSP and PV Solar Aveng Ground Engineering has recently increased our plant holding to include nine Gayk post driving rigs to ensure we are placed at the forefront of the solar renewable energy market. Capable of direct driving the posts or pre-drilling prior to post installation, Aveng Ground Engineering can provide foundation assistance for any PV or CSP solar plant. Wind Farms Incorporating our internal design capacity, Aveng Ground Engineering is uniquely positioned to not only offer foundation solutions for turbines founded in areas with deep bedrock but also to provide optimisation designs for turbines founded directly on rock in order to reduce the cost and time of construction. Wind turbine foundation 6 7
6 Lateral Support Soil Nail, Post Stressed Anchors and Shotcrete Systems Temporary and permanent solutions for vertical excavations up to 10m deep, most common in basements for new commercial developments. Smooth finish can be applied to enable the shotcrete wall to be the final interior wall for the basement. Contiguous Piled Wall CFA or auger piles are used to increase the supported depth of walls, up to 20m. Shotcrete is added between the piles and post stressed anchors are installed to support the piles. Secant Pile Wall Interlocking piles are installed to provide a watertight permanent lateral support solution which eliminates the need for shotcrete. Due to the accuracies required in pile installation SICAP piles are most commonly used. Sheet Piles Driven sheet piles provide a quick and watertight temporary or permanent lateral support solution in soft geotechnical conditions. Rock Bolts and Rock fall protection Most common in mining and road infrastructure, this system involves shoring up an excavated rock face against localised failure, to ensure the safety of those working at the bottom of the supported face. Lateral support Lateral support 8 9
7 Grouting Grouting Dam Grouting Curtain and Consolidation Aveng Ground Engineering is the most experienced South African contractor in the dam grouting market. Small diameter drilling locates fissures in bedrock so that they can be grouted to render the dam foundation as impermeable as possible or to ensure cohesiveness of the founding rock to ensure it can support the large dam structure. Compaction Grouting Dolomitic areas earmarked for development can have their risk class greatly reduced by systematic compaction grouting, which involves drilling on a grid pattern to locate and fill any cavities underlying the site, thus reducing the chances of a sinkhole forming. Grouting 10 11
8 Geotechnical Investigations Aveng Ground Engineering prides itself on being a choice geotechnical partner from conceptual phase right through to construction. Having in-house design capabilities as well as in-house professional geological capabilities allows us to provide quality information and advice. Our geotechnical investigations division offers the following products to best assist consulting engineers and clients to make the most cost effective foundation solution decision: Trial auger holes Core drilling Test pitting DPSH testing Material laboratory testing (outsourced) Section 3 Flagship projects Flagship Projects Nelson Mandela Bridge Bridge City Rail Link OR Tambo International Airport Access Bridges Soccer City Orlando Stadium Giant s Stadium Sappi Ngodwana GoCell Project Toyota Press Plant and Blanking Line Medupi Power Station Department of Environmental Affairs Melrose Arch Women s Living Heritage Monument Gautrain GFIP Package C and Package F Richards Bay Dry Bulk Jetty Ingula Pump Storage Scheme Bergriver Dam Gouda Wind Farm Sishen Solar Farm Gateway Mall Mall of the South University of Botswana Engineering and Technical Buildings and lateral support Tension anchors and lateral support Lateral support and compaction grouting and lateral support Dam grouting and lateral support Dam grouting and lateral support Post driving Contact Us Johannesburg (Head Office) Cape Town (Regional Office) Telephone: Physical Address: Aveng Park Aveng Grinaker-LTA House Jurgens Street, Corner Jet Park Road 115 Bamboesvlei Road Jet Park Ottery Boksburg South Africa South Africa groundengineering@aveng.co.za 12 13
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