Rock Excavation: a. When rock is encountered within the limits of the excavation, immediately notify the Owner and Architect and do not proceed further until instructions are received and measurements made for the purpose of establishing the and volume of rock excavation. b. Volume of rock excavation shall be determined by the location of the ...
Rock Splitting is a viable option to be able to remove or set in other areas. Tree Stump Services. Tree Stump Removal. ... Ron Sharleville Demolition Excavation. 13 Saint Johns Road Worcester, MA 01603* *The address as listed is for informational and mailing .
It may loosen and bring down quite good rock if the rock mass has joints and/or fissures that can be prised open by the bucket teeth. Drilling and blasting is required in sound rock excavation prior to the use of a face shovel type machine to excavate the broken rock and load to transport. Grab
Bid Tabulation Page 1 of 2 lg BL11715 Ronald Reagan Park Rehabilitation Department of Community Services ITEM # 1. ITEM # UNIT PRICE TOTAL PRICE UNIT PRICE TOTAL PRICE 1 CY ... Mass Rock Excavation Excavation of unsatisfactory materials and replacement with suitable fill. DESCRIPTION. QTY.
Palmstrom A. and Broch E.: Use and Misuse of Rock Mass Classification Systems with Particular Reference to the QSystem 5 The relative block size (RQD/Jn) The quotient (RQD/Jn), representing the structure of the rock mass, has the two extreme values .
Cavein. The separation of a mass of soil or rock material from the side of an excavation, or the loss of soil from under a trench shield or support system, and its sudden movement into the excavation, either by falling or sliding, in sufficient quantity so that it could entrap, bury, or otherwise injure and immobilize a .
Excavation, Contractor Furnished Borrow and Option Borrow Excavation. Unclassified/Rock Excavation: If rock is expected to be encountered the Unclassified/Rock Excavation bid item will be used instead of the Unclassified Excavation bid item. Rock consists of a sound and solid mass of inplace mineral matter of such hardness and texture
Often the seismic shock and effectson structures in the area make blasting an option that does not fit the situation. If the rock is not too hard and has enough seams to it with a large enough machine some times it is economical to just rip the rock out of the excavation. Blasting is the common solution to mass rock removal.
Earth excavation is removal of the layer of soil immediately under the topsoil and on top of rock. Used to construct embankments and foundations, earth usually is easy to move with scrapers or other types of earthmoving equipment. Rock excavation is removal of a formation that cannot be excavated without drilling and blasting.
9 ft x 12 ft rock excavation Approx 14 ft deep with one open face. Presplit 3 sides of perimeter on 9 inch c/c filling every other hole, production holes on x on a diagonally oriented grid. Typically the "presplit" holes are set up so they are 1/2 the distance apart as the holes in the mass area.
Rock Excavation and Support Systems Refer to Handout Factors Unique to Tunnelling • Uncertainty in the nature and variability of ground conditions (rock quality, ground water, gas, etc) need for adequate site investigations prior to and vigilance during tunnelling • onfined space of tunnel environment (limited access, escape, air quality ...
(the area where workers are exposed to mass soil or rock movement) Collapse Type 1. Spoil pile slide – improper excavating procedures occur when the excavated material is not placed far enough away from the edge of the excavation. The recommended minimum distance for location of excavated soil (spoil) from the edge of the excavation is equal ...
Dec 22, 2013· Introduction to Rock Mass Classification: Rock mass classification schemes have been developed to assist in (primarily) the collection of rock into common or similar groups. The first truly organized system was proposed by Dr. Karl Terzaghi (1946) and has been followed by a number of schemes proposed by others. Terzaghi's system was mainly ...
Jan 01, 2010· Tiffany Construction Company offer mass excavation projects. We can clear out large areas of land. We also do grading projects to smooth out an area.
Excavation and trenching are among the most hazardous construction operations. The Occupational Safety and Health Administration's (OSHA) Excavation standards, 29 Code of Federal Regulations (CFR) Part 1926, Subpart P, contain requirements for excavation and trenching operations. This booklet highlights key elements of the standards and describes
Excavation and trenching are among the most hazardous construction operations. OSHA defines an excavation as any manmade cut, cavity, trench, or depression in the earth's surface formed by earth removal. A trench is defined as a narrow underground excavation that is deeper than it is wide, and is no wider than 15 feet ( meters).