5-340 SECTIO N 546 – PRE-EXCAVATIO N OF ABUTMEN T PILES 546.0 1 DESCRIPTION . This work shall consist of drilling a hole to remove all subsurface material and backfilling in designated areas to provide suitable pile placement or driving conditions. 546.0 2 MATERIALS . Materials shall meet the requirements of the following subsect ions: Sand Borrow and Cushion ................................ ................................ ......................... 703.03 546.0 3 CONSTRUCTIO N REQUIREMENTS . The pre -excavation of abutment piles shall consist of augering, pre -boring, or some other means of excavation to produce an excavation to the depth and diameter specified in the Cont ract. The excavation shall be maintained to allow for backfilling with sand in accordance with the Contract . Temporary casing will be considered an acceptable option. Unless otherwise specified in the Plan s, the entire pre -excavation shall be filled with sand and the temporary casing shall be removed prior to installing piles. 546.0 4 DEFINITIONS .
a.Earth . In addition to the definition of earth in Subsection 101.02 , cobbles, boulders, and densely packed gravel will be considered excavation of earth.
b.Rock . All excavation of bedrock as determined by the Engineer. 546.0 5 METHO D OF MEASUREMENT . The quantities of Pre -Excavation of Abutment Piles, Earth and Pre-Excava tion of Abutment Piles, Rock to be measured for payment will be the total number of linear feet of excavation to the depth specified in the Contract or as ordered by the Engineer, measured to the nearest linear foot.
a.Earth . Where Structure Excavation and Pre -excavation of Abutment Piles, Earth occur jointly or separately at the same location, measurement for Pre -excavation of Abutment Piles, Earth will be made only below the lower limits of Structure Excavation.
b.Rock . The quantity of Pre -excavation of Abutment Piles, Rock to be measured for payment will be below the top surface of bedrock as determined by the Engineer. 5-341 546.0 6 BASIS OF PAYMENT . The accepted quantities of Pre -Excavatio n of Abutment Piles, Earth and Pre-Excavation of Abutment Piles, Rock will be paid for at the Contract unit price per linear foot. Payment will be full compensation for furnishing, transporting, storing, and installing the materials specified including the sand, for performing required excavation, and for furnishing all labor, tools, equipment, and incidentals necessary to complete the work. Payment will be made under: Pay Item Pay Unit
546.10 00 Pre-Excavation of Abutment Piles, Earth ................................ ................. Linear Foot
546.20 00 Pre-Excavation of Abutment Piles, Rock ................................ ................. Linear Foot
5-342 SECTIO N 551 – PUBLI C PROTECTIO N FOR BRIDG E PROJECTS 551.0 1 DESCRIPTION . This work shall consist of providing protection for vehicular and pedestrian traffic traveling below or adjacent to a bridge that is under construction. 551.0 2 SUBMITTALS . The Contractor shall submit construction drawings in accordance with the requirements of Subsection 105.06 for the methods and sequence of work, including the materials and equipment to be used for the work. The plan shall contain provisions for all stages of construction where any member of the public could be exposed to danger from falling objects or construction operations. Any calculations required to prepar e the construction drawings shall be included in the submittal. 551.0 3 GENERA L REQUIREMENTS . The Contractor shall determine the materials and methods to use for this work based on the conditions at a particular location.
a.Shielding . Should the Contractor choose to use shielding supported by the existing structure, it shall be made of material of adequate strength and size to completely protect the public from any falling objects related to the construction activities. The existing structure shal l be evaluated to determine if it can support the additional loads from the shielding system.
b.Enclosures . Should the Contractor choose to use an enclosure, it shall be made of material of adequate strength and size to completely protect the public from any falling objects related to the construction activities. Any roadway enclosure or containment system shall be of adequate width and height to allow passage of oversize vehicles. If required by the Engineer, vehicular enclosures which are more than 50 f eet long shall have their interior illuminated during daylight hours. Pedestrian enclosures of any length shall have their interior illuminated for the full duration of their use.
c.Diversions . Should the Contractor choose to divert the vehicular and pedestrian traffic from passing beneath the bridge under construction, the diversion course shall be as shown in the approved traffic control plan and meet the requirements of this specification. Diversions are only allowed when specified in the Contract.
d.Interruptions . Should the Contractor choose to interrupt the flow of vehicular or pedestrian traffic below a bridge under construction, flaggers shall be used. An interruption shall be defined as the stopping of traffic. The duration of time for each individual interruption shall not exceed 10 minutes, and the total of the interruptions shall not exceed thirty minutes in any hour. Interruptions are not allowed on interstate highways or limited access highways unless otherwise specified in the Contract. The method or combination of methods the Contractor chooses to use shall be fully operational before any construction work which might endanger the public begins on the bridge.
Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 754–755 of 1,380.