02160 Excavation Supporting System

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KUWAIT FINANCE HOUSE PLOT 13 IN HAWALLYDOCUMENT III-2 PARTICULAR SPECIFICATIONS

SECTION 02160

EXCAVATION SUPPORTING SYSTEM

PART 1 - GENERAL

1.01 SECTION INCLUDES : Provide shoring and bracing for excavations,complete.

1.02 RELATED WORK

A. Excavation.B. Trenching for utility and drainage systems.C. e!atering of excavations.

1.03 UALITY ASSURANCE

A. "egulatory "e#uirements: "efer to and comply !ith the governingConstruction $afety %rders& secure and pay for all re#uiredpermits. 'or o()site installation of shoring and related items,conform to re#uirements of public agencies having *urisdiction&obtain and pay for re#uired permits and inspections.

B. Professional %bservation: Perform +or of this $ection underobservation and approval of the Engineer. -ive Engineer not lessthan / hours advance notice of readiness for observation.

C. esign of $horing: Employ and pay a registered civil engineer toprepare and stamp dra!ings and calculations sho!ing shoringmethods, bracing or tie bac anchoring, !all supporting systems,and other systems to be used for protection of ad*acent existingstructures and improvements and for earth ban s& civil engineeralso shall obtain approvals for shoring into ad*acent properties orinto public property. The civil engineer shall submit these shoringdra!ings, calculations, speci0cation, installation, methodstatement to the Engineer for revie! and approval, obtain

approval prior to start of any construction involving shoring andpay fees and charges, and 0le three copies of the approveddra!ings and calculations !ith the Engineer.

1.0! PRO"ECT#SITE CONDITIONS

A. Protection: Provide and maintain protection to retain earth ban sand to protect ad*oining grades and structures from caving, sliding,erosion, or other damage. Provide suitable protection againstbodily in*ury. Construct bul heads and shoring to there#uirements of governing codes and regulations. $hore verticalban s or slope ban s bac as re#uired for stability and safety.Erect temporary barricades placed at least 1,23 mm 42 feet5 a!ayfrom top of slopes, and provide temporary berms re#uired toprevent slope erosion from !ater. Provide !arning lighting onbarricades during night hours.

EXCAVATION SUPPORTING SYSTEMS P$%& 02160# 1 "UNE' 2003


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B. Photographs and $urveys: Before starting +or of this $ection,Contractor shall employ and pay a commercial photographer to

prepare 367mm x 32 mm 4/ inches by 16 inches5 photographs of existing improvements, public and private, ad*oining the site andexcavation area to record all existing conditions. Contractor8s$urveyor shall survey, and resurvey at not more than monthlyintervals, all existing improvements to record any movements, andshall also periodically survey lateral and vertical locations of topsof shoring installations and lateral movement along entire lengthof all runs of shoring. 'ile t!o sets of photographs and surveyrecords !ith Engineer for record purposes only.

PART 2 - PRODUCTS

2.01 MATERIALS

A. $tructural $teel $oldier Beams: A$T9 A7 , !ide ;ange, si to 166> passing ?.2mm 47@/inch5 sieve, 6> to 12> passing the o. sieve, and 6> to 2>passing the o. / sieve.

-. %ther 9aterials: As speci0ed by civil engineer preparing shoringdra!ings and calculations.

PART 3 - EXECUTION

3.01 SHORING : Conform to the shoring dra!ings and calculations approvedby the re#uired urisdictional Agency. 9aintain !ide beam at top of slopes. Provide steel angle straps bet!een steel soldier beams if t!isting occurs during the tie)bac *ac ing operations. 're#uentlyinspect installed shoring and bracing for de;ections during construction.

A. $tructural $teel $oldier Beams: $pacing of beams, and si


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spans of lagging, shall be coordinated !ith and based on soilpressures determined by the Engineer.

1. rilled Placement: Beams may be placed in drilledexcavations, bottom length encased in concrete to theextent recommended by the Engineer& !ea concrete maybe used to encase the beams above the structural concretelevel.

3. riven Placement: Beams may be installed by driving tothe depth recommended by the $oils Engineer.

a. ammer: Capacity e#ual to hammer manufacturer8srecommendations for total !eight of beams and

subsurface materials to be encountered, but not lessthan one foot)pound of energy per pound of beam.%btain re#uired driving energy of hammer, except fordiesel hammers, by use of a heavy ram and a shortstro e !ith lo! impact velocity. uring 0nal driving,operate according to the hammer manufacturer8sdirections except operate diesel type at 0nal drivingat rate recommended by hammer manufacturer forhard driving. ammer and driving e#uipment,including driving helmet, are sub*ect to approval of the Engineer.

b. Procedure: rive beams !ith a steel helmet of theproper type and si


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C. =agging: nstall lagging as excavation progresses, !ith solidbearing on soldier beams and supports, and close contact bet!eenlagging edges. f caving occurs, 0ll voids behind the lagging !ithgrout or !ea concrete pumped into place.

. Tie)Bac Anchors: =ag, drill, grout, preload and@or test tie)bacanchors or bracing, and furnish re#uired testing e#uipment asrecommended and approved by the Engineer. Perform preloadingand testing under observation of the Engineer.

E. "emoval: "emove shoring and detension tie)bac anchors asre#uired except the soldier beams may be cut o( 16mm 43inches5 belo! the elevation of any ne! or existing construction,piping, conduit, or other improvement in the shoring area. All

lagging shall be removed as bac 0lling in the excavation areaprogresses. 'ill voids left by removals !ith compacted sand or peagravel bac 0ll.

3.02 CLEANING UP : "emove !aste and debris to a legal disposal area,obtain the necessary hauling permits, and pay all dump charges andfees. Prevent spillage of !aste on public streets.

E %' $ECT %

EXCAVATION SUPPORTING SYSTEMS P$%& 02160# ! "UNE' 2003

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02160 Excavation Supporting System