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Rock Slope Engineering
Our Geologists and Engineers perform detailed geologic mapping of rock cut faces to gather statistical information about critical strike and dip of joints and bedding features. The use of angled borings is often used to identify fault zones and fracture patterns in more complex geology. Based on this information, we evaluate and design rock slopes in accordance with the latest edition of FHWA’s Rock Slope Manual and TRB’s Manual on Rockfall Characteristics and Control. Based on the geologic mapping and data from the subsurface exploration, models are developed, and rock discontinuity parameters are established for stability analyses using kinematic and Limit Equilibrium stereonet evaluation using Rocscience DIPS and RockPack III software which compares the discontinuities to the proposed slope orientation. The global stability of critical rock wedges and blocks is evaluated for the need to incorporate stabilizing elements such as rock nails or shear pins. Rock face stability and rockfall analysis using the CRSP software is also considered to determine the requirements for steel mesh drapes, rockfall catchments ditches, attenuators, and rockfall fences.
We also have experience in developing provisions for blasting for site-specific conditions, as well as a review of pre-split and production blasting plans for trim blasting and mass blasting operations. We have also designed and monitored test blasting programs prior to construction to establish vibration control and feasibility criteria.
In establishing the long-term durability of rock-cut slopes, we also recommend and perform rock durability testing (slake durability) and acid-base accounting testing to verify the presence and concentration of sulfur in areas where acid-bearing rock is prevalent.
We also have experience in developing provisions for blasting for site-specific conditions, as well as a review of pre-split and production blasting plans for trim blasting and mass blasting operations. We have also designed and monitored test blasting programs prior to construction to establish vibration control and feasibility criteria.
In establishing the long-term durability of rock-cut slopes, we also recommend and perform rock durability testing (slake durability) and acid-base accounting testing to verify the presence and concentration of sulfur in areas where acid-bearing rock is prevalent.