621TEMPORARY STRUCTURES

621.01 Description ................................ ................................ ................... 661

621.02 Co nstruction ................................ ................................ ................. 661

621.03 Method of Measurement ................................ .............................. 662

621.04 Basis of Payment ................................ ................................ .......... 662

DESCRIPTION

621.01 Description

This work consists of constructing, maintaining, removing, and disposing of temporary structures and temporary shoring. CONSTRUC TION REQUIREMENTS

621.02 Construction

Construct all temporary structures at the location and to the dimensions, grades, and load capacity shown on the Plans or in the Contract, or in accordance with drawings prepared by the Contractor and approved by the Engineer. Alternate design and details prepared by the Contractor must be equivalent to the design and details furnished by the Department. Prepare and submit alternate designs and details as specified in 105.02. Unless other wise provided on the Plans or in the Contract, maintain temporary structures until the completion of the Contract or the opening of the permanent structure. The maintenance of all temporary structures shall include their replacement in case of partial or complete failure. The Department reserves the right, in case of the Contractor’s delay or inadequate progress in making repairs and replacement, to furnish such labor, materials and supervision of the work as may be necessary to restore the str ucture for proper movement of traffic. The Department will consider the entire expense of such restoration and repairs a part of the cost of the temporary structure and, where such expenditures are incurred by the Department, will charge them to the Contr actor. 621.03 662 Unless otherwise noted on the Plans or in the Contract, upon completion and opening to traffic of the permanent construction, remove and dispose of the temporary structure, restore the area as nearly as possible to its original condition, and leave the area in a neat condition satisfactory to the Engineer. Use temporary shoring to retain earth during grading operations and bridge construction to maintain traffic. Install temporary shoring at the locations shown on the Plans or as directed by the Eng ineer. The Department will not make payment for this item when used for the installation of drainage structures and utilities, to meet OSHA regulations, or for the Contractor’s convenience, unless these locations are specifically shown on the Plans. Design the temporary shoring for the specific locations and in -situ soil types. The submittal shall be in accordance with 105.02, shall be stamped by a Professional Engineer, licensed in the State of Tennessee, and shall include detailed drawings, design calculations, and shoring material requirements. Temporary shoring may consist of sheet piling, piling/lagging walls, tie back walls, and similar structures. COMPENSATION

621.03 Method of Measurement

The Department will measure t emporary structures by the unit (per each), completed, accepted, and satisfactorily removed at the designated time. The Department will measure and pay for temporary shoring by the square foot of exposed vertical face area. The bottom of shoring for payme nt will be where the exposed face intersects the existing or specified grade. The top of shoring for payment will be the actual shoring top, but not more than 1 foot above where the back of shoring intersects the existing or specified grade.

621.04 Basis of Payment

The Department will pay for accepted quantities at the contract prices as follows: Item Pay Unit Temporary Structure (Description – Station) Lump Sum (per Each) Temporary Shoring Square Feet 621.04 663 Such payment is full compensation for all designs, submittals, labor, tools, equipment, materials, and all other incidentals necessary to install and remove temporary structures and temporary shoring. Unless otherwise indicated, all salvageable material obtained from the removal and reconditioning work sh all remain the property of the Contractor. 622.01 664 SECTION 622 – SHOTCRETE

622.01 Description ................................ ................................ ................... 664

622.02 Materials ................................ ................................ ...................... 664

622.03 Propor tioning and Quality Assurance of Shotcrete ...................... 664

622.04 Preconstruction Test Panels ................................ ......................... 667

622.05 Production Test Panels ................................ ................................ . 668

622.06 Test Panel Curing and Testing ................................ ..................... 668

622.07 Mixing and Batching Shotcrete ................................ .................... 669

622.08 Equipment ................................ ................................ .................... 669

622.09 Method of Measurement ................................ .............................. 669

622.10 Basis of Payment ................................ ................................ .......... 670

DESCRIPTION

622.01 Description

This work consists of constructing shotcrete in reasonably close conformance with the Plans or as established by the Engineer. MATERIALS

622.02 Materials

Provide materials as specified in: Portland Cement , Type I ................................ ........................ 901.01 Fine Aggregate ................................ ................................ ....... 903.01 Coarse Aggregate ................................ ................................ .. 903.22 Water ................................ ................................ ...................... 921.01 Fly Ash ................................ ................................ ................... 921.15

622.03 Proportioning and Quality Assurance of Shotcrete