STANDARD SPECIFICATIONS FOR BRIDGE …

1 STANDARD SPECIFICATIONS . FOR. BRIDGE construction . EDITION15. 2013. STANDARD SPECIFICATIONS . FOR. BRIDGE construction . Prepared by: BRIDGE Engineering Section Alberta Transportation Edmonton, Alberta Copyright May, 2013. Her Majesty the Queen in right of Alberta, as represented by the Minister of Transportation This Book, or parts thereof, may not be reproduced in any form without the written permission of Executive Director, Technical standards Branch Alberta Transportation STANDARD SPECIFICATIONS FOR BRIDGE construction . SUMMARY OF SPECIFICATIONS . Sec No Description Page No 1 1 - 1. 2 Backfill .. 2 - 1. 3 Foundation Piles .. 3 - 1. 4 Cast-In-Place Concrete .. 4 - 1. 5 Reinforcing Steel .. 5 - 1. 6 Structural 6 - 1. 7 Precast Concrete Units .. 7 - 1. 8 BRIDGE 8 - 1. 9 Drain Trough Terminal Protection .. 9 - 1. 10 Heavy Rock Riprap .. 10 - 1. 11 Ducts and Voids .. 11 - 1. 12 Bridgerail .. 12 - 1. 13 Miscellaneous Iron .. 13 - 1.

2 14 Guardrail .. 14 - 1. 15 Non-Skid Polymer Overlay .. 15 - 1. 16 BRIDGE Deck Waterproofing .. 16 - 1. 17 Asphalt Concrete 17 - 1. 18 CSP and SPCSP Structures .. 18 - 1. 19 Painted Roadway 19 - 1. 20 Deck Overlay and Concrete 20 - 1. 21 Removal and Salvage of BRIDGE 21 - 1. 22 Painting .. 22 - 1. 23 Structural Lumber and Piling .. 23 - 1. 24 Sign Structures and Panels .. 24 - 1. 25 Mechanically Stabilized Earth Wall .. 25 - 1. 26 RCP and PBC Structures .. 26 - 1. STANDARD SPECIFICATIONS FOR BRIDGE construction . SECTION 1. EXCAVATION. TABLE OF CONTENTS. General ..1-1. Clearing ..1-1. Depth of Preparation of Foundations For Footings ..1-1. Cofferdams, Dikes And Berms ..1-2. General ..1-2. Drawings Required ..1-2. Concrete Seal ..1-2. Removal of Bracing ..1-3. Pumping of Water ..1-3. Removal of Cofferdams, Dikes And Berms ..1-3. Inspection of Excavation ..1-3. Classification of Excavation ..1-4. Measurement And Unit Price Per Cubic Metre.

3 1-4. Lump Sum Price ..1-4. STANDARD SPECIFICATIONS for BRIDGE construction Section 1, Excavation General Excavation is the removal of all material, of whatever nature, necessary for the construction of foundations, substructures or other works, in accordance with the drawings or as determined by the Consultant. Excavation shall include the construction of all cribs, cofferdams, dikes, berms or other devices necessary for the work, or necessary for maintaining the stability of adjacent headslopes, fills, or existing structures, the protection, dewatering and maintenance of the excavated region, and the disposal of excavated material not required or not suitable for backfill as determined by the Consultant. If any excavation or dredging is made at the site of the structure, the Contractor shall, without extra charge, after the foundation base is in place, backfill all such excavation to the original ground surface or river bed with material satisfactory to the Consultant.

4 Material deposited within the stream area from foundation or other excavation, or from any other operations, shall be removed and the stream area freed from obstruction. Where necessary, excavations shall be shored, braced or protected by cofferdams. The Contractor shall maintain the integrity and stability of existing headslopes and fills at all times. For projects in which the existing asphalt concrete pavement (ACP) surfaces are to be retained, the Contractor shall provide suitable and adequate protection of the ACP during excavation, trimming, or other construction activities. Protection may include placement of filter fabric and sand or crushed granular material over the ACP. Protection of the existing ACP will be considered to be incidental to the work and no separate or additional payment will be made. Any damage to the ACP caused by the Contractor's operations shall be repaired at his expense to the satisfaction of the Consultant.

5 Clearing Clearing required for the completion of the BRIDGE Work will be considered incidental to the Work and no separate or additional payment will be made. Depth of Footings The bottom of footing elevations shown on the drawings shall be considered as approximate only. The Department and Consultant may require changes in final dimensions or elevations of footings to establish a satisfactory foundation. Preparation of Foundations for Footings All rock or other hard foundation material shall be free of loose material, cleaned and cut to a firm surface as shown on the drawings. All seams shall be cleaned out and filled with concrete, mortar or grout. When concrete is to be cast on an excavated surface other than rock, special care shall be taken not to disturb the bottom of the excavation, and the final removal of the foundation material to grade shall not be made until just before the concrete is to be placed. March 2013 1-1.

6 STANDARD SPECIFICATIONS for BRIDGE construction Section 1, Excavation In the case of concrete culverts or certain spread footings, when a firm foundation is not attained at the grade established, the foundation shall be deepened to an elevation determined by the Department and Consultant and backfilled with suitable clay or granular material as described under Section 2, Backfill . In the case of spread footings, the lower part of the excavation, for a depth corresponding to the height of the footings, shall be made neat to the same plan dimensions and shape as the footing, and the concrete shall be placed without forms. Seepage water shall be collected and drained or pumped away before it can enter the neat portion of the excavation. Cofferdams, Dikes and Berms General All cofferdams, dikes and berms for foundation construction shall be carried to adequate depths and heights, be safely designed and constructed of good STANDARD materials, and be made as watertight as is necessary for the proper performance of the work which must be done inside them.

7 Their dimensions shall give sufficient clearance for construction and inspection of forms and permit pumping of water outside of the forms. No separate or additional payment will be made for the supply, construction or removal of cofferdams, dikes or berms. Full compensation for the cost of such material, equipment, tools, labour and incidentals shall be considered included in the price bid for the specified work to be carried out inside the cofferdam, dike or berm. Drawings Required For substructure work, the Contractor shall submit drawings of the proposed cofferdam, shored excavation, dike or berm construction , and associated work procedures. The drawings and work procedures shall be signed and sealed by a Professional Engineer, registered in the Province of Alberta. The drawings shall be submitted to the Consultant two weeks prior to the commencement of the work for review and acceptance. The Consultant will review the drawings as to intent only, and any acceptance of such drawings by the Consultant shall in no way relieve the Contractor of his full responsibility for the work.

8 Concrete Seal When conditions are encountered which in the opinion of the Department and Consultant make it impracticable to dewater the foundation before placing concrete, he may require or allow the construction of a concrete foundation seal below the elevation of the bottom of the foundation, of such dimensions as may be necessary. The foundation shall then be pumped out and the work completed in the dry. During the placing of a foundation seal the elevation of the water inside the cofferdam shall be controlled to prevent any flow through the seal and if the cofferdam is to remain in place, it shall be vented or ported at low water level. No separate or additional payment will be made for construction of the concrete seal unless it is specified on the drawings, in which case it will be paid for at the price bid. March 2013 1-2. STANDARD SPECIFICATIONS for BRIDGE construction Section 1, Excavation Removal of Bracing No timber or bracing shall be left in the cofferdams in such a way as to extend into the substructure concrete, without written permission of the Department and Consultant.

9 Pumping of Water Pumping from the interior of any cofferdam shall be done in such a way as to prevent the flow of water through any fresh concrete. No pumping will be permitted during the placing of concrete or for a period of 24 hours after, unless the pumping is done from a suitable sump separated from the concrete by a watertight wall or other means accepted by the Consultant. Pumping to dewater a sealed cofferdam shall not commence until the seal has set sufficiently to withstand hydrostatic pressures. In cases where turbid water is to be pumped from any excavation, a suitable settling pond shall be provided to ensure that only water free from suspended material finds its way into any stream. Details of the settling pond and monitoring programs shall be included in the Contractor's ECO plan. Removal of Cofferdams, Dikes and Berms Cofferdams, dikes and berms shall be removed after completion of the Work for which they were installed.

10 The Contractor shall take care not to disturb or damage the finished works in any way during removal operations. Backfill required around the permanent work shall be placed prior to removal of cofferdams, dikes or berms. The Consultant reserves the right to require the Contractor to remove all materials from the streambed at any time to prevent stream pollution or adverse environmental effects, including bank erosion, or effects on adjacent structures or any other installations or property. If the Contractor fails to comply with this requirement, the Department and Consultant further reserves the right to make immediate separate arrangements to remove such materials at the Contractor's expense. The Contractor shall be responsible for all costs incurred by the Department and Consultant to remove such material and/or all damages incurred. Inspection of Excavation After the excavation is completed to the elevation shown on the drawings, the Contractor shall notify the Consultant.