DOCUMENT

ITB - Site Preparation and Excavation Services 2006

  • YEAR CREATED: 2006
  • ENTITY TYPE: Authority: Other
  • TYPE OF DOCUMENT: BID - ITB, IFB, ITT, RFB
This document provides context information for a construction project involving the design soil bearing pressure and recommendations for the use of fill soils. The document states that the design soil bearing pressure for newly compacted fill or clayey silt alluvium or silty clay residuum is 2,500 pounds per square foot (psf). Regarding the undercut of fill soils, the document mentions the need to remove existing vegetation, asphalt, concrete, and fill within the proposed development area. The depth of the undercut is to be determined during site preparation, and soft or unstable soils are to be replaced with more competent soils. For structural fill recommendations, the document advises taking representative samples of proposed fill materials and testing them for compaction and classification characteristics. Soils containing deleterious material, organics, topsoil, or rock fragments larger than four inches should not be used for structural fill. Soils with a Plasticity Index over 30 and/or a Standard Proctor maximum dry density less than 90 pounds per cubic foot (pcf) require prior engineering evaluation and approval. Soils with a Plasticity Index less than 30 can be used if the moisture content is within a certain range. The controlled fill should be graded for positive drainage and to prevent sub-grade deterioration. It should be placed in uniform lifts, compacted to specific densities, and tested by a qualified soils technician. Sloped areas should be properly benched, and the recommendations apply to an area at least ten feet outside of proposed building footprints. The document also includes sections for vendor response, non-collusion affidavit, affidavit of eligibility, and bidder references.
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