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Bridgestone Retail Operations, LLC PROJECT MANUAL Version: January 2012 SECTION 02225 STRUCTURAL EXCAVATION AND BACKFILL PART 1 GENERAL 1.01 GENERAL REQUIREMENTS A. This specification shall govern for all work necessary to accomplish the structural excavation required to complete the project. PART 2 MATERIALS 2.01 GENERAL A. Structural excavation shall include all material encountered including earth, asphalt, base material, concrete, masonry, rock, trees, stumps, and roots. PART 3 EXECUTIONS 3.01 STRUCTURAL EXCAVATION EXCEEDING 5 FEET IN DEPTH: A. Excavation Safety: 1. The Contractor's excavation safety procedures shall, in all respects, meet the current standards established by the U. S. Department of Labor, Occupational Safety and Health Administration (OSHA) on excavation, trenching and shoring. B. Responsibility: 1. Contractor has the sole and exclusive responsibility for the sufficiency of the trench excavation safety systems utilized. 2. The Contractor shall specifically agree that neither the Owner nor the Engineer has such responsibility, and Contractor will not rely on the Owner or the Engineer or any of their representatives for inspection, design, supervision, construction or any other aspect of trench excavation safety protection. 3. Contractor shall fully indemnify, safe and hold harmless Owner and Engineer, their employees and agents (hereinafter the Indemnities) against any and all liability, damage, loss, claims, demands and actions of any nature whatsoever on account of personal injuries (including, without limitation on the foregoing, workers' compensation and death claims), or property loss or damage of any kind whatsoever, which arise out of or are in any manner connected with, or are claimed to arise out of or be in any way connected with, the negligence of the Contractor in the inspection, design, engineering, supervision, construction, safety devices or other activity connected with the trench excavation safety protection under this Agreement. 4. Contractor shall, at his own expense, investigate all such claims and demands, attend to their settlement or other disposition, defend all actions based thereon and pay all charges of attorneys and all other costs and expenses of any kind arising from any such liability, damage, loss, claims demands, and actions. STRUCTURAL EXCAVATION AND BACKFILL 02225 – Page 1 of 4
Bridgestone Retail Operations, LLC PROJECT MANUAL Version: January 2012 3.02 STRUCTURAL EXCAVATION 5 FEET OR LESS IN DEPTH: A. GENERAL: 1. The limit of excavation shall be such to allow for placing and removing forms, installing sheeting, shoring, bracing, etc. The Contractor shall pile excavated material in a manner that will not endanger the work and will avoid obstructing sidewalks and driveways. Gutters shall be kept clear. B. VERTICAL SIDES: 1. When necessary to protect existing or proposed structures or other improvements, the Contractor shall maintain vertical sides of the excavation. 2. The limit shall not exceed three feet outside the footing on a vertical plane parallel to the footing except where specifically approved otherwise by the Engineer. 3. The Contractor shall provide and install any sheeting, shoring and bracing as necessary to provide a safe work area as required to protect workmen, structures, equipment, trees, etc. The Contractor shall be responsible for the design and adequacy of all sheeting, shoring, and bracing. 4. The sheeting, shoring, and bracing shall be removed as the excavation is backfilled in such a manner as to prevent injurious caving. C. SLOPING SIDES: 1. Where sufficient space is available, the Contractor shall be allowed to back slope the sides of the excavation. 2. The back slope shall be such that the excavation shall be safe from caving. 3. The type of material being excavated shall govern the back slope used. The Contractor shall be responsible for determining the back slope used, but in any case the back slope shall be no steeper than 1 foot horizontal to 1 foot vertical. 3.03 CONSTRUCTION METHODS A. DEWATERING 1. The Contractor shall keep the excavation free from water by use of cofferdams, bailing, pumping, well point, or any combination as the particular situation may warrant. 2. All dewatering devices shall be installed in such a manner as to provide clearance for construction, removal of forms, and inspection of exterior of form work. 3. It is the intent of these specifications that the foundation be placed on a firm dry bed. The foundation bed shall be kept in a dewatered condition a sufficient period of time to insure the safety of the structure, but in no case shall dewatering be terminated sooner than 7 days after placing concrete. All dewatering methods and procedures are subject to the approval of the Engineer. 4. The excavation shall be protected from excessive rainfall and drying. The excavation shall be inspected and approved by the Engineer before work on the structure is started. 5. It is the intent of these specifications that the Contractor provide a relatively smooth, firm foundation bed for footings and slabs that bear directly on the undisturbed earth without additional cost to the Owner, regardless of the soil conditions encountered. The Engineer will be the judge as to whether these conditions have been met. 6. The Contractor shall pile excavated material in a manner that will not endanger the work. STRUCTURAL EXCAVATION AND BACKFILL 02225 – Page 2 of 4
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REPORT OF GEOTECHNICAL ENGINEERING
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Proposed Bridgestone April 20, 2011
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FIGURE: 3 DATE STARTED: 4/5/11 DRIL
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FIGURE: 11 DATE STARTED: 4/5/11 DRI
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APPENDIX A Laboratory Test Results
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12 SWELL-CONSOLIDATION TEST 10 8 6
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10 SWELL-CONSOLIDATION TEST 8 6 4 2
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June 21, 2012 Bridgestone Retail Op
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