SPECIFICATIONS FOR SUPPLYING AND PLACING BACKFILL

3y ago
39 Views
2 Downloads
30.34 KB
6 Pages
Last View : 15d ago
Last Download : 2m ago
Upload by : Vicente Bone
Transcription

March 2010Specification 1001 (I)SPECIFICATIONS FORSUPPLYING AND PLACING BACKFILL1.0DESCRIPTIONThe Work shall consist of:.1 Processing, loading, hauling, unloading, placing and compacting backfill material;.2 Protecting backfill material from freezing;.3 The quality control (QC) testing of all backfill material; and.4 Payment of royalties.The quantity for supplying and placing backfill may be increased during construction to include thequantity of additional backfill material required because of additional excavation to remove poor soils asdescribed in the Specifications for Structural Excavation.2.0REFERENCES AND RELATED SPECIFICATIONSAll reference standards and related specifications shall be current issue or latest revision at the date oftender advertisement.2.1Related Specifications 3.0Specifications for Structural ExcavationSUBMITTALSThe Contractor shall provide evidence that scales have been calibrated and certified for the currentcalendar year by the Weights and Measures Services of the Government of Canada before the scaleswill be accepted for use.Where the scale has not been calibrated and certified for the current calendar year, the Engineer maytest the scale using procedures specified by Weights and Measures Inspection Services and approvethe scale for use on the project.4.0MATERIALS4.1GeneralAll material used for backfill, including non-granular material, shall meet the following specifications andshall be of a quality acceptable to the Engineer. All backfill material shall be in a thawed state when placingand compacting, and be free from rocks, large or frozen lumps, wood, or other unsuitable material. Backfillmaterial shall not be placed on frozen substrate.Page 1 of 6Manitoba Infrastructure and Transportation

March 20104.2Specification 1001 (I)Types of BackfillBackfill material shall conform to one of the following types:.1 Type 1 – Granular BackfillSieve Size% Passing Standard SieveGranularLimestone37.5 mm10010025.0mm85 – 10085 – 1004.75 mm25 – 8025 – 80425 mm15 – 4015 – 3575 µm8 – 180 - 10Min. Crush Count15%-Max. Los Angeles Abrasion Loss40%32%Max. Shale Content20%-.2 Type 2 – Culvert GravelSieve Size% Passing Standard Sieve37.5 mm1004.75 mm25 – 80425 µm15 – 40 (mechanically compacted)425 µm5 – 10 (water jetted)75 µm6 – 18 (mechanically compacted)75 µm0 – 8 (water jetted)The shale content shall not exceed 25% by weight of the particles retained on a 4.75 mm sieve.3 Type 3 – Non-Granular Cohesive MaterialNon-granular cohesive material shall be highly plastic clay (exhibiting putty-like properties withconsiderable strength when dry) and non-organic. Material with very high swelling potential such asbentonite clays will not be permitted. When proposed material characteristics are in question, theEngineer may require the Contractor to classify the material using Test Method ASTM D2487 –Classification of Soils for Engineering Purposes. Non-granular cohesive material shall have a minimumPlasticity Index of 40.The non-granular cohesive material shall be free of rocks and stones.When approved by the Engineer, non-granular cohesive material can be substituted with granularmaterial.Page 2 of 6Manitoba Infrastructure and Transportation

March 2010Specification 1001 (I)5.0CONSTRUCTION METHODS5.1GeneralThe Contractor shall backfill the excavated areas with the specified type of backfill material, unlessotherwise directed by the Engineer, to the elevation of the ground surface existing immediately prior to thestart of excavation or to the elevations specified on the Drawings. Backfill material shall be placed inaccordance with the Drawings, this Specification, the Special Provisions and to the satisfaction of theEngineer.Backfill material shall be stockpiled within a suitable area approved by the Engineer. Examples ofunsuitable areas include, but are not limited to, the following:-in the flood plain,on the edge of an embankment creating slope stability issues, orlocations impeding sight lines of the travelling public through or around the site.During freezing weather, the Contractor shall protect all backfill material from freezing until it is placed to thesatisfaction of the Engineer.5.2Granular BackfillThe granular backfill shall be placed in layers not to exceed 150 mm in depth and each layer shall bethoroughly compacted by means of packers or mechanical tampers to a relative compaction of not less than95% Standard Proctor Density for the backfill material at optimum moisture content.5.3Culvert GravelCulvert gravel for bedding shall be spread uniformly along the full length of the culvert foundation. For metalculverts, the bedding shall be constructed so that after compacting, a depth of at least 150 mm of gravelremains under the full length of the culvert. Culvert gravel shall be compacted at optimum moisture contentto a minimum of 95% Standard Proctor Density.Compaction of culvert gravel material in the haunch area for round or oval culverts may be carried out bymechanical methods or by water jetting.5.4Non-Granular Cohesive BackfillCohesive backfill shall be deposited in horizontal layers not exceeding 200 mm in thickness. Every layershall be tamped in place and well compacted by means of mechanical tampers before the next layer isdeposited.In the event that local non-granular cohesive material is deemed unsuitable by the Engineer, the Contractorshall supply non-granular cohesive material meeting the requirements of Section 4.2.3.5.5Backfilling for Culverts, Abutments and Piers.1 GeneralSpecial precautions shall be taken to prevent wedging action against abutments, retaining walls orculvert walls.Backfill material placed around culverts, abutment wingwalls and piers shall be deposited on both sidesto approximately the same elevation at the same time.Unless permitted by the Engineer, backfill shall not be placed against any concrete structure within adistance of 1.0 meter until the concrete has reached 80% of the 28 day design strength.Page 3 of 6Manitoba Infrastructure and Transportation

March 2010Specification 1001 (I)The backfill in front of culvert headwalls and in front of abutment bearing seats and wingwalls shall benon-granular cohesive material.2 CulvertsCulverts shall be backfilled with granular material in the areas bounded by:(a) the bottom and side slopes of the excavation;(b) the headwall of the culvert; and(c) the dimensions and elevations shown on the Drawings.3 AbutmentsConcrete abutments shall be backfilled with granular material in the areas bounded by:(a) the bottom and side slopes of the excavation under the approach slabs;(b) the wingwalls of the abutment; and(c) the dimensions and elevations shown on the Drawings.4 PiersConcrete piers shall be backfilled with granular material in the areas bounded by:(a) the bottom and side slopes of the excavation; and(b) the dimensions and elevations shown on the Drawings.6.0QUALITY MANAGEMENT6.1GeneralThe Contractor shall submit a sample of the backfill material and test results fourteen (14) days prior tobeginning backfilling operations.6.2Quality ControlThe Contractor shall be responsible for all quality control testing and shall complete the minimum testingrequirements to the specified frequency and test procedures as described in Table 1.6.3Quality AssuranceThe Engineer, at his/her discretion, may complete random quality assurance testing on all materialsincorporated into the Work. The Contractor shall allow the Engineer unhindered access to the materials andshall assist the Engineer in carrying out any sampling or testing, including the provision for necessary trafficcontrol, suitable access and storage. There shall be no charge to the Department for materials taken by theEngineer for testing purposes.Page 4 of 6Manitoba Infrastructure and Transportation

March 20107.0METHOD OF MEASUREMENT7.1Type 1 – Granular Backfill and Type 2 – Culvert GravelSpecification 1001 (I)Supplying and placing of granular backfill and culvert gravel will be measured on a mass basis of hauledmaterial. Weigh scale tickets for each truck shall be provided to the Engineer or his representative forverification and approval prior to unloading of backfill material.7.2Type 3 – Non-Granular Cohesive MaterialSupplying and placing non-granular cohesive material will be paid for on a lump sum basis and nomeasurement will be taken for this Work.8.0BASIS OF PAYMENT8.1Type 1 – Granular BackfillSupplying and placing granular backfill will be paid for at the Contract Unit Price per tonne for "Supplyingand Placing Granular Backfill", measured as specified herein, which price will be payment in full forperforming all operations herein described and all other items incidental to the Work.8.2Type 2 – Culvert GravelSupplying and placing culvert gravel will be paid for at the Contract Unit Price per tonne for "Culvert Gravel",measured as specified herein, which price will be payment in full for performing all operations hereindescribed and all other items incidental to the Work.8.3Type 3 – Non-Granular Cohesive MaterialSupplying and placing non-granular cohesive material will be paid for at the Contract Lump Sum Price for“Lump Sum Backfill”, measured as specified herein, which price will be payment in full for performing alloperations herein described and all other items incidental to the Work.Page 5 of 6Manitoba Infrastructure and Transportation

March 2010Specification 1001 (I)Table 1AGGREGATE TESTING REQUIREMENTSTESTSamplingGradation EQUENCYCSA A23.2-1AASTM D 75CSA A23.2-2AASTM C 136, C 117Soundness of AggregateCSA A23.2-9AASTM C 88Density of AggregateCSA A23.2-10AASTM C 29MRB-A202One test per hour of production or asdirected by the Engineer.Standard ProctorASTM D 698MRB-A213Sand EquivalentASTM D 2419AASHTO T176MRB-A215ASTM D 5821MRB-A203Coarse Aggregate Only:Crush CountShale ContentMRB-A208Flakiness IndexMRB-A216Micro-DevalDry-Rodded Unit WeightCSA A23.2-29AASTM D 6928MRB-A214ASTM C 29MRB-A207Los Angeles Abrasion – Large SizeCSA A23.2-17AMRB-A205Los Angeles Abrasion – Small SizeCSA A23.2-16AMRB-A206Relative Density and AbsorptionCSA A23.2-12AASTM C 127MRB-A210Base Course Mix DesignOne test per hour of production or asdirected by the Engineer.MRB-A201One test per material.At the request of the Contractor.Fine Aggregate Only:Organic ImpuritiesCSA A23.2-7AASTM C 40Surface MoistureCSA A23.2-11AASTM C 70Relative Density and AbsorptionCSA A23.2-6AASTM C 128MRB-A211One test per material.ASTM C 117MRB-A204One test per sample.Material Finer than 75 µmPage 6 of 6As directed by the Engineer.Manitoba Infrastructure and Transportation

ASTM C 40 Surface Moisture CSA A23.2-11A ASTM C 70 As directed by the Engineer. Relative Density and Absorption CSA A23.2-6A ASTM C 128 MRB-A211 One test per material. Material Finer than 75 µm ASTM C 117 MRB-A204 One test per sample. Title: Microsoft Word - Specification 1001 _I_ Supplying and Placing Granular Backfill.doc Author: jbetke Created Date: 3/8/2010 3:23:55 PM .

Related Documents:

Bruksanvisning för bilstereo . Bruksanvisning for bilstereo . Instrukcja obsługi samochodowego odtwarzacza stereo . Operating Instructions for Car Stereo . 610-104 . SV . Bruksanvisning i original

10 tips och tricks för att lyckas med ert sap-projekt 20 SAPSANYTT 2/2015 De flesta projektledare känner säkert till Cobb’s paradox. Martin Cobb verkade som CIO för sekretariatet för Treasury Board of Canada 1995 då han ställde frågan

service i Norge och Finland drivs inom ramen för ett enskilt företag (NRK. 1 och Yleisradio), fin ns det i Sverige tre: Ett för tv (Sveriges Television , SVT ), ett för radio (Sveriges Radio , SR ) och ett för utbildnings program (Sveriges Utbildningsradio, UR, vilket till följd av sin begränsade storlek inte återfinns bland de 25 största

Hotell För hotell anges de tre klasserna A/B, C och D. Det betyder att den "normala" standarden C är acceptabel men att motiven för en högre standard är starka. Ljudklass C motsvarar de tidigare normkraven för hotell, ljudklass A/B motsvarar kraven för moderna hotell med hög standard och ljudklass D kan användas vid

LÄS NOGGRANT FÖLJANDE VILLKOR FÖR APPLE DEVELOPER PROGRAM LICENCE . Apple Developer Program License Agreement Syfte Du vill använda Apple-mjukvara (enligt definitionen nedan) för att utveckla en eller flera Applikationer (enligt definitionen nedan) för Apple-märkta produkter. . Applikationer som utvecklas för iOS-produkter, Apple .

Daisy Investiture Ceremony Samples: Daisy says: (placing first petal-Lupe) “I will do my best to be honest and fair,” Daisy says: (placing second petal-Sunny) “friendly and helpful,” Daisy says: (placing third petal-Zinni) “considerate and caring, Daisy says: (placing fourth petal-Tula) “courageous and strong, and” Daisy says: (placing fifth petal-Mari) “responsible for what I .

This presentation and SAP's strategy and possible future developments are subject to change and may be changed by SAP at any time for any reason without notice. This document is 7 provided without a warranty of any kind, either express or implied, including but not limited to, the implied warranties of merchantability, fitness for a .

An Offer from a Gentleman novel tells Sophie’s life in her family and society. Sophie is an illegitimate child of a nobleman having difficulty in living her life. She is forced to work as a servant because her stepmother does not like her. One day, Sophie meets a guy, a son of a nobleman, named Benedict. They fall in love and Sophie asks him to marry her legally. Nevertheless Benedict cannot .