Tiêu đề 312316-Earthwork (Site).pdf ✅

EARTHWORK 31 23 16 - 1 SECTION 31 23 16 – EARTHWORK PART 1 - GENERAL 1.01 RELATED DOCUMENTS A. The General Provisions of the Contract, including General and Supplementary Conditions, and Division One General Requirements apply to the work specified in this section. B. Form 819 shall mean the State of Connecticut, Department of Transportation Standard Specifications for Roads, Bridges and Incidental Construction, Form 819 or its latest edition and any supplemental specifications. 1.02 SUMMARY A. This Section includes the following: All site excavating, not included under other sections, required for grading, trenching, paving, curbs, or any other subsurface structures. All earthwork related to the building/foundations shall be in accordance with information in the Geotechnical Report and all other project specifications and drawings. The Contractor shall place, compact and dispose of excess excavated materials in accordance with the plans, specifications and directions of the Engineer. 1. Unclassified Excavation shall include the removal of existing pavements, curbs, earth, boulders, buried timber, broken concrete pieces, existing foundations (e.g. concrete block), brick and other materials of any nature that may be encountered. 2. The Contractor shall construct and place fill and backfill material in accordance with this specification. 3. The Contractor shall saw cut existing pavements and/or saw cut existing curbs in accordance with the plans, specifications and direction of the Engineer.
EARTHWORK 31 23 16 - 2 1.03 RELATED SECTIONS (Not Applicable) 1.04 DEFINITIONS A. “Suitable Material” or “Acceptable Material” 1. ASTM D 2487 soil classification groups GW, GP, GM, SW, SP, and SM; free of rock or gravel larger than 6 inches in any dimension, debris, waste, frozen material, vegetation and other deleterious material. 2. Any mineral (inorganic) soil, blasted or broken rock and similar materials of natural or man made origin, including mixtures thereof, are considered acceptable materials. B. “Unacceptable Material” - ASTM D 2487 soil classification groups GC, SC, ML, MH, CL, CH, OL, OH and PT. 1.05 QUALITY ASSURANCE A. Material Standards: As defined in Form 819 inclusive of all supplements. B. Testing: Compaction tests may be required by the Owner and will be paid for by the Owner. No specific testing schedule has been established at this time. If tests indicate that density requirements have not been achieved, the Contractor shall continue compacting. All re-testing in unsatisfactory areas shall be paid for by the Contractor. C. Density and Compaction Testing: The Contractor is responsible to schedule compaction tests as required by the Owner and to allow adequate time for the proper execution of said tests. 1.06 PROTECTION A. Dust Control: Use all means necessary to control dust on and near the construction areas caused by the Contractor's performance of the work in conformance with Form 819. 1.07 PROJECT CONDITIONS A. West Nile Virus Precautions: To stem the spread of West Nile Virus, the Contractor shall closely monitor the work of this section to prevent water from collecting and/or ponding within or adjacent to the work for any length of time, thereby reducing the opportunities for mosquitoes to breed.
EARTHWORK 31 23 16 - 3 PART 2 - PRODUCTS 2.01 MATERIALS A. Backfill, Fill and Embankment Materials: Any acceptable material in accordance with the CTDOT 819. Contractor shall submit a sample of onsite material to be reused for approval. B. Subbase Material (if needed): Conform to Form 819, Section M.02.02 - Subbase. C. Processed Aggregate Base (if needed): Conform to Form 819, Section M.05.01. D. Bedding Material (if needed): Sand or sandy soil, all of which passes a 3/8" sieve, and not more than ten percent (10%) passes a No. 200 sieve. E. Granular Fill: Well graded gravel conforming to M.02.06 Grading A, shall be provided. 2.02 BORROW SOIL FILL A. Conform to Form 819 Section 2.07 “Borrow”.
EARTHWORK 31 23 16 - 4 PART 3 - EXECUTION 3.01 GENERAL A. The entire area of work shall be brought to the required lines and grades by excavation and filling. Excavated materials, acceptable in the opinion of the Engineer and, shall be used in making embankments and filling the low areas of the work, and at such places as the Engineer may direct. B. Excavate to the limits shown on the Drawings to subgrade level. Compact subgrade level before placing fill, base or subbase materials. C. Construct base course to required depths and elevations below all bituminous concrete. D. Construct bedding course below all drainage and utility structures. E. Place suitable/ acceptable material below all lawn and landscaped areas. No rocks larger than 2 inches in any dimension shall be placed within 4 inches of the finished grade. 3.02 COMPACTION REQUIREMENTS A. Compact soil to not less than the following percentages of maximum dry density according to ASTM 1557: 1. Under foundations, concrete pads, and pavements, compact the top 12 inches below subgrade and each layer of backfill or fill material at 95 percent maximum dry density. 2. Under lawn or unpaved areas: see Section 32 91 13 - Topsoil. 3.03 EXCAVATION A. Protect Structures, utilities, sidewalks, pavements and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earthwork operations. Any damage to existing structures or utilities that occurs as a result of the Contractor’s operations shall be corrected by the Contractor at no additional cost to the Project. B. Protect subgrades and foundation soils against freezing temperatures or frost. Provide protective insulating materials as necessary. C. Provide erosion and control measures to prevent erosion or displacement of soils and discharge of soil-bearing water run-off or airborne dust to adjacent properties and watercourses, in accordance with the Sediment and Erosion Control Plan, details and as directed by the Engineer. D. Subgrade: All soft, boggy, clayey or other objectionable material below the proposed subgrade elevation shall be removed, and the area refilled with acceptable material.