40 MAY 2025 WorldWide Drilling Resource® Sullivan-Palatek introduced the D300PD2KR, a dual pressure, dual capacity, portable air compressor designed to meet diverse needs. The versatile unit delivers either 300 cubic feet per minute (cfm) at 100 pounds per square inch (psi) or 230 cfm at 150 psi, providing flexibility for various applications. At the heart of the D300PD2KR is a Tier 4 Final Kohler engine, notable for its compliance with stringent emission standards and its design which eliminates the need for diesel exhaust fluid. This engine pairs with a precision-engineered twin screw airend, developed and manufactured by Sullivan-Palatek, ensuring efficient and reliable performance. The compressor features a user-friendly cooler access panel which simplifies maintenance and enhances operational efficiency. Robust construction and advanced design makes the D300PD2KR a dependable choice for professionals seeking a portable compressor that combines power, efficiency, and ease of use. Geotechnical Operations at the Oregon Capitol Adapted from Information by Robit Plc The Oregon State Capitol building has endured a string of calamities throughout its history, including the burning of the first capitol in 1855, shortly after its inauguration, and the second suffering the same fate in 1935. However, fire is not the only natural force to threaten it. Large parts of the state, including Salem, sit on the Cascadia Subduction Zone, a tectonically active fault line. In March 1993, a 5.6-magnitude earthquake caused significant damage to the capitol, cracking its cupola and creating a massive bulge on its west end. To shield the historic building from future seismic threats, the State of Oregon undertook extensive research, resulting in the selection of seismic isolation as the preferred solution, involving the use of pendulum isolators and a seismic joint to facilitate movement of the complex during earthquakes. This would be no easy feat, as it would entail lifting the building off the ground. To achieve this, a temporary shoring tower structure would be built, allowing the building to rest on it while the new isolation system was being installed. The project would also involve constructing an additional basement level, thereby addressing the Capitol’s longstanding need for more space. Pacific Foundation secured the primary contractorship for the geotechnical work. The initial challenge involved gaining access beneath the Capitol and excavating sufficient space for the drill rigs. The scope of work included drilling micropiles into the ground across the building’s entire footprint. The operation was complex, with up to seven drill rigs working simultaneously in narrow spaces with limited clearance. The micropile composition included two-thirds Robit casing systems and one-third double rotary systems for the outside piles. A total of 175 shoring towers, supported by the micropiles, held the jacked up building in place during the construction process. Partner companies were responsible for the tower construction and jacking operations. By the end of 2023, the installation of 722 micropiles had been finished, and by late January 2024, the building had been transferred to the shoring tower structure. This development paved the way for the seismic isolation system installation and subsequent reconstruction. The intricate project required substantial structural engineering expertise, meticulous planning, and effective coordination between participating parties to ensure timely completion while maintaining safety, particularly given the state legislature’s concurrent session just above. The renovated historic marble building is expected to be resistant to future seismic activity upon completion. Shoring towers stretching across the entire footprint of the Capitol building. GEOTECH
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