STATNAMIC
Bermingham Foundation Solutions developed the STATNAMIC
load test to meet the construction industry's demand for an accurate and
cost-effective method of determining the load bearing capacity of caissons
and high capacity piles. Developed jointly by Berminghammer Foundation Equipment
of Canada and TNO Building & Construction Research of the Netherlands,
STATNAMIC can be used on any pile type with minimum
pile preparation. Loading is perfectly axial and the relatively slow application
and release of compressive forces eliminates tensile stresses, compressing
the pile and the soil as a single unit. As a result, static load-displacement
behaviour can be obtained.
The Statnamic test was used on the foundations of the world’s tallest
building in Taipei, the world’s tallest hotel, and the world’s
tallest residential tower. It’s also been used by highway departments
in the United States and in Japan, where it tested the highway replacing
that destroyed by the Kobe earthquake.
INTERNATIONAL AGENTS
Statnamic has several agents around the world who conduct testing. You
can contact Bermingham or go directly to the agent in your area:
USA
Applied Foundation Testing, Inc.
4015 J. Louis St..
Green Cove Springs, Florida
USA 32043
Tel: +1 904 284-1337
Fax: +1 904 284-1339 Mike Muchard & Don Robertson
drobertson@testpile.com
http://aft.intersolutions.com
ASIA
Geonamics (M) Sdn. Bhd. Geonamics
40 Jalan Emas SD5/1A, Bandar Sri Damansara 153 Kampong Ampat
52200 Kuala Lumpur, Malaysia #05-02 Jun Jie Industrial Building
Tel: +60-3-632-4715 Singapore
Fax: +60-3-632-6496 Tel: 02 3430300 Fax 02 3431197
(Chuah Lam Siang) clams@pc.jaring.my
Diagnostic Engineering Consultants, Ltd. (DECL)
5F, No.26 Lane 513 Rei-Kwang Road,
Neihu, Taipei City (114)
Taipei, Taiwan R.O.C.
Tel: + 886 2 8797 2111
Fax: + 886 2 8797 2158
Joseph Chang decl@email.gcn.net.tw
AUSTRALIA
Frankipile Australia Pty. Ltd.
56 Station Street
Parramatta, N.S.W., Australia 2150
Tel: +61-2-9891-2588
Fax: +61-2-9891-1616
australia@franki.com.au
EUROPE
Profound BV
Limaweg 17
2743 CB Waddinxveen
The Netherlands
Tel: 31 182 640 964
Fax: 31 182 649 664
info@profound.nl
Peter Middendorp
JAPAN
Fugro Japan Co., Ltd.
1-21-2 Jingumae Shibuya-Ku
Tokyo, Japan
Tel: +81-3-3497-0298
Fax: +81-3-3423-9662
>tsukuki-mak@apost.plata.or.jp
SOUTH AMERICA
Geotecnica Cientec S.A.C.
Lavalleja 847/49
(1414) Buenos Aires, Argentina
Tel: +54-11-4862-0547
Fax: +54-11-4861-8126 Hernan Goldemberg GEOTECNICA@datamarkets.com.ar
UK
Precision Monitoring and Control Ltd. PMC Limited
Wass Way, Durham Lane Ind. Park
Eaglescliffe, Cleveland
TS16 ORG United Kingdom
Tel: 44 1642 790 800
Fax: 44 1642 790 808 Ken Cameron ken.cameron@piletest.co.uk
Advantages
STATNAMIC applies loads up to 30 MN (3,400
tons).
Foundations tested include high capacity drilled shafts, steel piles,
augercast piles, timber piles, batter piles in clay, rock, silt, and sand.
STATNAMIC can test bridge foundations, pile
groups, spread footings, and off-shore piles.
STATNAMIC can test the lateral capacity of
foundations.
Production piles can be tested without prior planning. No reaction piles
are required.
Three 600 ton tests can be conducted in a one day shift.
Several STATNAMIC tests can be conducted for
the cost of a single static test.
STATNAMIC loads the pile and soil together.
The duration of loading is on the order of 10 Hz.
STATNAMIC 's built-in load cell and laser
sensor provide direct measurements of load-displacement behaviour.
STATNAMIC produces load-displacement results
immediately on site.
Theory
 In STATNAMIC
testing, solid fuel is burned within a pressure chamber. As the pressure
increases, an upward force is exerted on a set of reaction masses while
an equal and opposite force pushes downward on the pile. Loading increases
to a maximum before unloading by a controlled venting of the pressure.
Built-in instrumentation (load cell and laser sensor) record load and
displacement during the entire STATNAMIC test.
During a STATNAMIC test, measured signals from
the load cell and laser sensor are digitally recorded by TNO's Foundation
Pile Diagnostic System (FPDS). Over 2000 values of load and displacement
are recorded. Load versus displacement results are presented immediately
on-site, as well as graphs of load, displacement, velocity, and acceleration
versus time. Straightforward methods of analysis are provided through
easy-to-use software to determine any damping or inertial effects. Load-deflection
behaviour and the ultimate capacity of the foundation are clearly presented
to the user.
STATNAMIC assembly is straightforward. All
components are handled with a small hoisting machine. Reaction masses
are sectional (2400 kg for the 5 MN, 8,200 kg for the 16 MN) and made
of concrete, lead, steel, etc. Concrete reaction masses can be cast on-site
and reused
Hydraulic Catch Mechanism
 The
STATNAMIC catch mechanism is an alternative
method of conducting a STATNAMIC load test without
gravel and gravel structure, using hydraulics to arrest the reaction mass.
A much shorter assembly time is required with the catch mechanism, allowing
more test cycles in the same time. With the 3 MN hydraulic catch mechanism
device, as many as 30 STATNAMIC tests can be
conducted per day.
FEATURES
- hydraulically-operated catch mechanism
- calibrated load cell and laser sensor mounted directly on pile
- tests augercast piles, precast concrete piles, driven piles, cast
in-situ piles and spread footings
- available on 3 MN, 6 MN, 9 MN models
- see Berminghammer about retrofitting existing devices
ADVANTAGES
- fast setup of equipment means more tests per day
- fast cyclic loading allows up to 30 tests per day
- easily transported
- one man operation
For more information on the hydraulic catch mechanism or STATNAMIC,
please contact Berminghammer.
University Research Programs
Many engineering departments around the world have done research
on the Statnamic method. Below is a list of some of the universities that
have had such programs:
United States
Auburn Universtity – Dan Brown, axial and lateral
analysis of drilled shafts
Brigham Young University – Kyle Rollins, lateral
analysis and pile groups
Johns Hopkins University – Rajah Anandanarajah
– cyclic lateral analysis, Statnamic earthquake tester
Texas A&M – Jean-Louis Briaud, comparison
testing
University of Massacchusetts (Lowell) – Samuel Paikowsky,
rate of loading in clay
University of South Florida – A. Gray Mullins, segmental
unloading point method, model pile testing in frustum confining vessel
Canada
University of Western Ontario – M. Hesham El Naggar,
axial analysis using signal matching, lateral analysis
McMaster University – Robert Horvath and Dieter Stolle,
rate of loading, model pile in frustum confining vessel
Indonesia
Petra Christian University – S. Prawono, axial and
lateral testing
Japan
Tokyo Institute of Technology – O. Kusakabe, standardization
and building codes
Kyusyu Kyoritsu University – Y. Maeda, axial analysis
methods, including wave analysis
Kanazawa University – Tatsunori Matsumoto, analysis
methods and field testing
Yamaguchi University – T. Aso and T. Aida, signal
matching techniques
Nippon Institute of Technology – H. Kubota and F. Kuwabara,
loading rate
Kyoto University – M. Kimura, model pile testing
using air-pressure device
Korea
Seoul University – M.M. Kim, axial testing, analysis
methods
United Kingdom
Sheffield University – Adrian Hyde, rate of loading
in clay, model pile testing in clay consolidation chamber
Australia
University of Western Australia – Mark Randolph,
model pile testing using soil anchors as reaction
Other Research:
The Federal Highways and Works Administration in the
United States
Japanese Geotechnical Society, Committee for Rapid Load
Test Methods
PUBLICATIONS
First International Statnamic Seminar
Second International Statnamic Seminar **
Case Studies
30 MN (3400 ton) Statnamic
16 MN in Kobe, Japan
0.6 MN Hydraulic Catch Mechanism
You can order the Proceedings from the 2nd International Statnamic Seminar
book from Balkema Publishers,
Phone: (+31.10) 414 5822
E-Mail: info@ashgate.com
Web: balkema.ima.nl
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