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SOILANCHORS by FS
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FS PERMANENT GROUND ANCHOR SYSTEM "REGROUTABLE" +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Foundation Specialists [FS] has a long and successful experience in the installation of ground anchors, both temporary and permanent.
FS has installed ground anchors in various Countries for a large spectrum of
structures and purposes : in the Philippines FS has successfully installed ground anchors all over the country, for
a variety of projects, Power Plants, Dams, Steel Mills, Building Basements, Slope Support,
Anchor Blocks for Penstocks, Bridges and Viaducts, Road Tunnels , Water Diversion
Tunnels , Diaphragm Walls. Foundation Specialists has installed anchors even in Luneta (MANILA) for the anchoring
against uplift forces, of the National Museum vast underground
reinforced concrete water reservoir. In particular in Baguio
City, FS has, as far as 1987 (twenty years ago) , installed permanent ground anchors (regroutable)
on a sub-vertical slope, for a composite diaphragm wall designed to save, from collapse due to heavy scouring,
the Citicorp rest-house complex built on top of the Mine-view
slopes. [Interesting to note that the Citicorp complex subsequently survived without damage the 1990 earthquake, while several
neighbouring structures collapsed or were severely damaged]. Also in the Baguio area, Foundation Specialists has installed permanent anchors to support the abutment structures of the Camp 5 bridge along Kennon Road, among others. The Permanent Ground Anchors installed by FS are in accordance with ASTM, European and British Standards. In addition to it, to cope with the difficulties
created in tropical regions by having to deal with residual soil formations, Foundation Specialists has introduced an additional feature that makes the permanent anchors installed by FS , pressure-groutable and regroutable. DESCRIPTION OF ++++++++++++++++++++++++++++++++++++++++++++ The individual protection of the free stressing
steel strands (passive anchor length) is made with grease filled individual HDPE tubes. The corrugated permanent casing is closed at the anchor bottom end by a watertight cap , while the top end of the corrugated HDPE casing is inserted into a watertight
, sealed and grease-filled assembly, which contains the head steel anchor plate, the anchorages, and the anchor head cap. All material employed
comes with mill certificate.
PROCEDURES FOR +++++++++++++++++++++++++++++++++++++++++++++++++++++++ Once the hole for the anchor has been readied, the anchor
assembly is installed into it, for the entire length of the permanent casing, then grouting begins, from
the bottom up, using a non corrosive shrink-compensating cement grout. Both the
inner and the outer space of the anchor assembly are backfill-grouted. For the
cement grout, care has to be taken to keep the water-cement ratio at a minimum, to avoid to generate
bleeding while curing. The cement grout injected inside the permanent casing provides the
necessary bond between the active strands length and the corrugated HDPE casing, while the cement grout
injected outside the corrugated HDPE casing, to fill the drilled anchor hole, provides the bond between the anchor assembly
and the surrounding ground.
The ground anchor , as described here above, is a standard Permanent Ground Anchor. Both the bond between the steel strands and the casing and the bond between the casing and
the surrounding ground are provided by the backfill grout as described. The reliability
of the system hinges on the efficiency of the shrink compensating grout additives,
which are expected to avoid the formation of a gap at the two interfaces upon completion of grout curing (that usually involves
shrinkage ). It is not uncommon to observe anchors that, when being tensioned, are sliding slowly forward, thus losing
tension: when this happens, the anchor has to be pulled out and the job done again. The fact that some anchors become lose, it is caused sometime by defective grouting procedures, but most often is due to the characteristics
of the surrounding ground formations. To
obviate these problems, FS ha introduced implements and procedures such that, with no change to the final
characteristics and properties that make the Anchor a "PERMANENT ANCHOR”, enable the Contractor to further re-grout the Anchors, under increasing pressure. High pressure injections carried away through manchettes greatly
improve the efficiency and reliability of the bond between the anchor assemly and the surrounding soil strata by
compressing the ground around the anchor by means of pressure injected cement grout (thus the definition
of REGROUTABLE) . The same principle
is applied for the inner part of the permanent casing. The free
stressing length of the soil anchor is organized in such a way that while the space between the protective HDPE individual tubing
is eventually grouted to prevent accumulation of water or moisture, the strands , inside their individual
greased tubing, remain permanently free to stretch (during earthquake), as designed. At the end of each grouting stage the manchette pipes
are washed and cleaned and remain available for further grouting stages, if ever the need for
it would arise. The grout injections
are carried out through manchettes (one way valves usually inserted
at 50 centimeter intervals on the grout pipes) and flexible double packers
properly designed for the purpose SoilAnchors.info
is a Domain of Foundation
Specialists The Company The two Concerns that were merged to form Foundation Specialists, had, over the years dedicated to develop and manage the planning and construction of large Underground Hydropower Schemes, including Pump-Storage Hydropower Plants, in difficult geological and geomorphological conditions. managed through theoretical and field R & D to fine tune field applications of Geotechnical and Foundation Engineering, Soil and Rock Mechanics and develop Construction Methods and Technologies applicable to general conditions. Because of the way it was formed, Foundation Specialists
started “ab initio” as a leader in its consolidated fields of expertise, i.e. large, complex
infrastructure projects with important foundation-engineering-related components.
http://foundationspecialists.eu/ http://foundationspecialistspng.com/ http://foundationspecialistsqatar.com/ http://foundationspecialistsdubai.com/ http://foundationspecialistssaudi.com/ http://foundationspecialistsinc.com/ Foundation Specialists Head-Quarters are in the Central Business District of Makati City, Metro-Manila, Philippines, where, the Philippine company Foundation Specialists, Inc. with "AAA" PCAB category for general engineering and general building, and Large "B" for the Public Sector Infrastructure Projects, has been engaging in the construction of large INFRASTRUCTURES [flyovers, bridges, underpasses, overpasses, wharfs & piers, tunnels, roads, mass rail transit systems, hydro power schemes and irrigation schemes], BUILDINGS (residential, commercial, industrial, institutional), INDUSTRIAL PLANTS, MULTI-LEVEL BASEMENTS, projects involving large amounts of FOUNDATION WORKS, for the last three decades.
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CLICK HERE TO CONTACT US OR PHONE US YOUR PROJECT RELATED INQUIRIES.
LET Foundation Specialists STUDY YOUR PROJECT AND SUBMIT PROPOSALS FOR THE IMPLEMENTATION OF YOUR PROJECT. FOUNDATION SPECIALISTS [headquarters address]: Legaspi Towers 200, 107 Paseo De Roxas Central Business District, 1226 Makati City, MM Philippines Phone (+63-2) 817-6826 Website: http://foundation-specialists.com Contact: info@FoundationSpecialistsInc.com Powered by Register.com |
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Foundation Specialists has very high quality control
standards and a record of successfully completing all its projects on or ahead of schedule, with full Clients' satisfaction. You can confidently entrust the implementation of your projects to Foundation Specialists You can confidently entrust the implementation of your projects
to
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