2010 Construction and Material Specifications - Ohio Department of ...
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2010 Construction and Material Specifications - Ohio Department of ...

2010 Construction and Material Specifications - Ohio Department of ... 2010 Construction and Material Specifications - Ohio Department of ...

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208.01 207 Cubic Yard Sediment Removal (Cubic Meter) 207 Foot (Meter) Construction Fence ITEM 208 ROCK BLASTING 208.01 Description 208.02 Regulations on the Use of Explosives 208.03 Product Specifications 208.04 Stabilization 208.05 Blasting Plan Submittal 208.06 Production Holes 208.07 Blasting Test Sections 208.08 Safety Procedures 208.09 Presplitting 208.10 Cushion (Trim) Blasting 208.11 Sliver Cuts 208.12 Blaster 208.13 Blasting Consultant 208.14 Pre-Blast Condition Survey 208.15 Vibration Control and Monitoring 208.16 Airblast and Noise Control 208.17 Hydrologist 208.18 Flyrock Control 208.19 Public Meetings 208.20 Record Keeping 208.21 Method of Measurement 208.22 Basis of Payment 208.01 Description. This work consists of using production and controlled blasting techniques to fracture rock or shale and to construct stable final rock cut faces. Controlled blasting refers to the controlled use of explosives and blasting accessories in carefully spaced and aligned drill holes to produce a free surface or shear plane in the rock along the specified excavation backslopes. Controlled blasting techniques include presplitting, cushion (trim) blasting, and sliver cut blasting. If the designed cut slope is steeper than 1:1 and deeper than 5 feet (1.5 m), use controlled blasting techniques, even if the main excavation is ripped or excavated. In rare instances, the Department will specify presplitting for 1 to 1 slopes. For all slopes that do not require controlled blasting techniques, rake, excavate, hoe ram, or mechanically shape these slopes to obtain a neat and smooth appearance. Production blasting refers to the rock fragmentation blasts resulting from more widely spaced production holes drilled throughout the main excavation area adjacent to the controlled blast line. Detonate production holes in a controlled delay sequence. 122

123 208.02 208.02 Regulations on the Use of Explosives. Perform all blasting operations according to all applicable Federal, State, and local laws and regulations, and the provisions of 107.09. These regulated blasting operations include but are not limited to the following: A. Storage and handling of explosives, blasting agents, and detonators. B. Use of explosives in character and amount as allowed. C. Storage plan, including the type of magazine or explosive storage facility to be used on the job site. D. Record keeping, placarding, safe distances, and all other requirements concerning storage. E. Obtaining and displaying magazine permits. 208.03 Product Specifications. Be aware that delay elements in blasting caps may deteriorate with age. Aged explosives are known to deliver much less than the rated energy. If evaporation occurs or if improperly mixed, bulk explosives (such as ammonium nitrate and fuel oil) may not contain the proper amount of diesel oil. Low diesel oil drastically reduces the energy content of the explosive and commonly produces reddish brown or yellow fumes upon detonation even in dry blast holes. Use products conforming to manufacturers’ specifications. Ship the manufacturer recommended expiration dates with the products delivered to the project. Do not use any blasting product that is either excessively old or in a deteriorated condition. Cease all work until the product’s age or quality is determined. 208.04 Stabilization. Remove or stabilize rock along the cut face that is loose, hanging, or creates a potentially dangerous situation during or upon the completion of the excavation in each lift. Do not drill the next lift until this work is performed. 208.05 Blasting Plan Submittal. Submit three copies of the Blasting Plan to the Engineer and one copy of the Blasting Plan to the Office of Construction Administration for review at least 2 weeks before beginning drilling and blasting operations, or at any time the drilling and blasting methods change. If the drilling and blasting methods change, submit four copies of the changed sections one week prior to the work. The Blasting Plan shall include, at a minimum, the following: A. General details of the drilling and blasting patterns and controls proposed to use for both the controlled and production blasting. B. Station limits of proposed shots. Critical distances to structures. Place the pre-blast survey limits detailed in 208.14 on the Right-of-Way or plan view sheets. C. One plan and section view per main excavation cut of the proposed typical range of drill patterns including a range of free face, burden, blast hole spacing, blast hole diameters, blast hole angles, lift heights, and subdrill depths.

208.01<br />

207 Cubic Yard Sediment Removal<br />

(Cubic Meter)<br />

207 Foot (Meter) <strong>Construction</strong> Fence<br />

ITEM 208 ROCK BLASTING<br />

208.01 Description<br />

208.02 Regulations on the Use <strong>of</strong> Explosives<br />

208.03 Product <strong>Specifications</strong><br />

208.04 Stabilization<br />

208.05 Blasting Plan Submittal<br />

208.06 Production Holes<br />

208.07 Blasting Test Sections<br />

208.08 Safety Procedures<br />

208.09 Presplitting<br />

208.10 Cushion (Trim) Blasting<br />

208.11 Sliver Cuts<br />

208.12 Blaster<br />

208.13 Blasting Consultant<br />

208.14 Pre-Blast Condition Survey<br />

208.15 Vibration Control <strong>and</strong> Monitoring<br />

208.16 Airblast <strong>and</strong> Noise Control<br />

208.17 Hydrologist<br />

208.18 Flyrock Control<br />

208.19 Public Meetings<br />

208.20 Record Keeping<br />

208.21 Method <strong>of</strong> Measurement<br />

208.22 Basis <strong>of</strong> Payment<br />

208.01 Description. This work consists <strong>of</strong> using production <strong>and</strong> controlled<br />

blasting techniques to fracture rock or shale <strong>and</strong> to construct stable final rock cut<br />

faces.<br />

Controlled blasting refers to the controlled use <strong>of</strong> explosives <strong>and</strong> blasting<br />

accessories in carefully spaced <strong>and</strong> aligned drill holes to produce a free surface or<br />

shear plane in the rock along the specified excavation backslopes. Controlled<br />

blasting techniques include presplitting, cushion (trim) blasting, <strong>and</strong> sliver cut<br />

blasting.<br />

If the designed cut slope is steeper than 1:1 <strong>and</strong> deeper than 5 feet (1.5 m), use<br />

controlled blasting techniques, even if the main excavation is ripped or excavated.<br />

In rare instances, the <strong>Department</strong> will specify presplitting for 1 to 1 slopes. For all<br />

slopes that do not require controlled blasting techniques, rake, excavate, hoe ram,<br />

or mechanically shape these slopes to obtain a neat <strong>and</strong> smooth appearance.<br />

Production blasting refers to the rock fragmentation blasts resulting from more<br />

widely spaced production holes drilled throughout the main excavation area<br />

adjacent to the controlled blast line. Detonate production holes in a controlled<br />

delay sequence.<br />

122

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