6757 Micropiles Brochure A/W - ischebecknz.co.nz

1 Micropiles from The piling solution for difficultground conditions Can be installed in confined spaces Caseless micropile with capacity inexcess of 3660 kNAdvantages overconventional piles Works in compression and tension Does not require temporary casing Improved mechanical ground/grout interactionreduces overall depth Dramatically increased production rates Lightweight rotary percussive drilling equipment Installed in confined spaces Permits top down jet grouting in saturated claysand silts complete with re-bar Perfect as pali radice for invisible structuralrepairs Bayonet fixing eliminates pile trimming andfacilitates remote de-coupling Self drilling Micropiles provide a range ofworking loads from 110kN to 3,660 kN Minimal noise Low vibration Minimal spoil2 MicropilesIschebeck Titan injection piles are ideal for use astension piles, mini piles and root piles (pali radice) inmicropiling Titan Micropiles consist of a continuouslythreaded, hollow stem steel reinforcement tendoncombined with an OPC grout body of a minimum 25 N/mm2strength.

2 The profiled surface of the groutbody transfers tension and/or compression forcesinto the Titan Micropiles comply with the newEuropean standard DIN EN hollow micropileGrout cover > 25mmContinuous drilling and groutingSacrificial drill bitFlushing through hollow bar4 Micropiles for basement constructionThe Little BoltonsThe owners of this exclusive propertydecided to build a new basement and totallyrebuild the interior of the existing new six metre deep basement wouldextend under the front and rear gardens aswell as beneath the house itself, a total areaof around rebuilding of the interior required theremoval of all internal elements from groundfloor to roof level, including floors, ceilingsand stairs. Front, rear and side elevationswere retained and temporarily supportedduring to the site was only possible fromthe front of the property and so largeopenings were formed through the front andrear walls with sway frames being installed tofacilitate plant demolition and constructioncommenced in earnest, Ischebeck Titanmicropiles with reinforced concrete pile capswere installed at the four corners and twosets in the centre of the property to supportthe sway frames.

3 The piles were temporarilybraced at intervals as the basement sexcavation progressed to assure stability ofthe piles were installed adjacent to party andgarden boundary walls. These were used toprovide temporary support to the existingretained structure and to provide lateralrestraint for the Ischebeck Titan conditions comprised approximatelyfive metres of sandy silts overlying threemetres of medium-dense sandy gravelswhich, in turn, overlaid the London water level was at approximately 6metres below existing ground for basement constructionPrior to excavation, and following asuccessful early testing programme toassure feasibility, Ischebeck Titan self-drillingmicropiles, designed to work in tension andcompression, were installed to enable thebasement floor to withstand gravitational anduplift what was the first use of a bayonetcoupling in the UK, the Micropiles wereinstalled from the original ground level.

4 Some6 metres above the intended finished depthof the than leaving the entire pile in place,as would be required using temporary casedpiles, the 6 metre drill string is uncoupled atthe bayonet fixing by simply reversing thedrilling direction, leaving the slab s reinforcingmicropile in place at the 6 metre depth andbelow, but enabling the drill string to beremoved, and re-used, from the slab toground method of micropile installationdelivered huge benefits to both theexcavation and concrete substructureprogramme, and also for health and safetyissues. Other benefits include; no trimmingdown of the piles, no risk of pile damagefrom plant impact and no obstructions toexcavation plant. Lorry movements areminimal, which offers environmental benefits,as there is very limited spoil created duringinstallation and the cement grout is delivereddry and mixed on site.

5 The method ofinstallation is very quick and was ideal forthese ground conditions, as conventionalpiles would have required temporary for basement constructionCruikshank StreetThe construction of a deep basementat a private residence in London made fulluse of Ischebeck Titan Micropiles . Some150No. 6m long 73/45 Micropiles wereinstalled using a cross-cut drill bit. Themicropiles formed an integral part of thesubstructure with the base and groundfloors. 150No. 73/45 Micropiles 175mm cross-cut drill bit Gravels over sand overlying stiff clayTregunter RoadConstruction of a double basement to thefront and rear of the garden and under theexisting house. Ischebeck Titan micropileswere used as temporary works in two forms;Firstly for soil retention and then for supportto stabilise the sway frames to allow for plantaccess.

6 Approximately 50No. 8m 127/111piles were installed using a 220mm drill bitfor the soil retention and 30No. 9m 40/20piles were installed for the sway frames. 40/20 and 127/111 Micropiles installed intodense gravels Confined access 127/111 tendon exposed and used as partof permanent works7 Micropiles for underpinningSellwood TerraceRedevelopment and conversion of twoadjoining properties into a single prestigiousresidence. To accommodate a new basementthe end property had to be demolished andrebuilt, but this left the problem of excavatingthe deep basement adjacent to theneighbouring property and garden/boundarywall on the other side. Traditionalunderpinning would have proved a costly andrisky operation and bored piling was ruled outas the client wanted to maximise thebasement s footprint. 127/111 Micropiles installed Piles installed both vertically and raked Grout broken off front of piles to maximisefootprintArthur RoadConstruction of basement to the rear ofgarden to accommodate a swimming Titan Micropiles were used astemporary works for soil retention as analternative to traditional piles used in conjunction withtemporary 30/14 ground anchors installedunder the existing house.

7 This eliminated theneed to prop internally, thus freeing upworkspace, allowing improvement on theprogramme. Approximately 40No. 9m127/111 piles were installed using a 220mmdrill bit for the soil retention and 20No. 9m30/14 ground anchors. 127/111 Micropiles plus 30/14 groundanchors Quicker and safer than traditional methodsof soil retention Micropiles raked under the house tomaximise basement footprint8 Arenas de BarcelonaThis impressive project to create a newcommercial centre with underground parkingwithin the historic fa ade of Barcelona s mainbullring admirably demonstrates the potentialof Ischebeck Titan Micropiles . Consultationat the early stages of project design was thekey to its order to retain the original structure simposing and symbolic fa ade, it wassupported by micropile columns installed atintervals around the structure.

8 Parallel in-situconcrete beams were used inside andoutside to distribute the weight of thefreestanding fa ade. The interior of thestructure was removed and excavationcommenced to create the five levels ofunderground parking. 21m 73/53 Micropiles Underpinning Roman bullring Historic fa ade retainedMicropiles for underpinning9 Micropiles for new buildStratford RoadPrivate housing development to build eco-friendly home. Micropiles used to anchorhouse's split-level base slab. Total of and raked 30/11 combi-coatedmicropiles installed through boulder clay andsandstone to 9m depth. Restricted accessrequired mini Marini Voyager drilling rig withMA100 rotary percussive head. Restricted access Anchor split-level base slab 30/11 combi-coated micropilesCrossflatsCollapsed retaining wall very close to thewing wall of a house required concrete block initially poured to preventfurther collapse of the road edge.

9 Schemecombined 40/16 micro piles and 30/11 soilnails to stabilise road whilst spoil materialexcavated. Piles installed at intervalsthrough concrete block to about 12m in theunderlying soft material and then intosandstone, creating contiguous piled spoil material excavated in front of verticalwall rows of soil nails were installed toprevent any lateral movement. Soil nailsinstalled to 9m into sandstone. Combined micropile/soil nail solution 40/16 Micropiles to 12m. 30/11 soil nails to9m Contiguous piled wallMicropiles for new build foundationsCharlestown of AberlourHousing development constructed using mass concrete strip foundationsdirectly onto the rockhead. Area of the final two houses, however, hadapproximately 6m of fill overlying the rockhead, requiring an working pile load of 170kN was established by the consulting engineersand a pile length of 7m was agreed.

10 The Micropiles were drilled throughthe overlying fill and 1m into the rockhead using a 70mm button typesacrificial drill Ischebeck Titan 40/20 Micropiles were installed in one 9-hour shift. 40/20 black Micropiles 170kN working load 7m piles drilled through to rockheadBroomhead ParkPrivate housing development comprisingtwo-storey flats of timber frame conditions of made ground and clayover sandstone dictated that foundations bestabilised. A total of 29No. 30/16 blackmicropiles installed to depth of 9m using95mm hardened clay drill bit. Piles used incompression to vertical load of 75kN. 30/16 black Micropiles Vertical pile load 75kN in compression Made ground and clay over sandstoneDufftownPrivate housing development of fourteennew timber framed homes constructed onformer quarry site. Ground conditions of upto of made ground on very stronglimestone demanded that foundations bestabilised.