Articles tagged with Underground Construction
Subway systems are consistently reporting thermal discomfort due to the rising heat, with complaints increasing by 10-27% for every 1 degree Celsius above 10 degrees Celsius in Boston, New York, and London respectively. The study aims to help transit agencies anticipate extreme heat and implement targeted mitigation strategies.
Researchers warn of structural weakening in urban areas as a result of groundwater overexploitation, posing risks to millions of people. Satellite radar data reveals nearly 1.9 million people exposed to subsidence rates greater than 4 millimeters per year.
Experts at Flinders University are calling for a new approach to water security on Pacific islands, where rising sea levels threaten local water supplies. Infiltration galleries, which extract fresh groundwater from shallow depths, may provide a solution, but more research is needed on their optimal design and performance.
Researchers developed a LiDAR-based settlement monitoring method to measure ground and building settlements induced by tunneling in Singapore. The method achieved millimeter-level accuracy, reducing labor costs and improving efficiency compared to traditional methods.
A novel carbon-neutral grout, CSRGF, has been developed by recycling waste fluids from geothermal energy harvesting plants, addressing environmental challenges in traditional grouting methods. The new material shows remarkable performance, with a 50% increase in liquefaction resistance and superior water-sealing properties.
A team of researchers from Shibaura Institute of Technology developed a moving particle simulation-aided soil plasticity analysis for earth pressure balance shield tunnelling. The study found that earth pressure is a reliable indicator for analyzing soil plasticity and proposed a computer-aided analysis system that precisely reflects e...
A recent study reveals that urban underground space (UUS) development can provide substantial carbon-sequestration potential through geothermal energy utilization. The research analyzes China's UUS development over two decades and concludes that long-term operation of metro systems can offer significant carbon-sequestration benefits.
A team of researchers at Nagoya University has developed a novel method to seal cracks and fractures in rocks using a concretion-forming resin. The resin holds its shape and seals flow-paths rapidly, withstanding six earthquakes in a test period, making it more durable than conventional cement-based materials.
Scientists will study neutrinos to solve big questions about the universe. UTA is building portions of two detectors in South Dakota and training students to help with the project.
A novel numerical analysis successfully replicates observed excavation damaged zone (EDZ) trends at the Horonobe underground research laboratory. The study demonstrates high reproducibility and accurately depicts fracture failure modes, addressing a key aspect of rock deformation and fracturing interactions.
A Northwestern University study links underground climate change to shifting ground beneath urban areas, causing building foundations and surrounding ground to move excessively and crack. The researchers also found that past building damage may have been caused by rising temperatures, which will continue for years to come.
Researchers created a system to monitor underground gas pipelines using high-tech sensors that can detect weaknesses, discrepancies, and diversion in residential natural gas lines. The method uses ultrasonic sensors to transmit signals through the pipe, limiting the likelihood of gas diversions and ensuring public safety.
A novel ferroelectric tunnel junction (FTJ) synapse based on Ag/PbZr0.52Ti0.48O3(PZT, (111)-oriented)/Nb:SrTiO3 demonstrated 256 conductance states with satisfactory linearity and stability. The ON/OFF ratio was as high as 200, and an endurance of up to 10^9 cycles was achieved.
Researchers from the University of Birmingham have successfully used a quantum gravity gradiometer to detect an object hidden below ground, marking a significant milestone in the development of this technology. The breakthrough could lead to faster, cheaper, and more comprehensive underground mapping, with potential applications in ind...
Scientists have developed a mathematical method to interpret data on underground water flows, providing more efficient and accurate imaging for planning construction works and inspecting dams. The technique has great potential for locating water reservoirs in dry areas and tapping into this resource for agricultural and industrial needs.
A lidar mapping study of ancient Teotihuacan shows that the city's engineers reshaped the landscape for construction, rerouted rivers to align with astronomical significance, and identified hundreds of previously unknown architectural features. The study confirms how these modifications continue to influence modern activities in the area.
Researchers at Caltech studied ant digging habits and uncovered mechanisms guiding their tunnel construction. Ants use efficient techniques to minimize work, digging straight tunnels along cup edges, and sensing force chains to avoid digging there.
Researchers studied the 426-kilometer-long Aqueduct of Valens and found that it was cleaned of carbonate deposits just a few decades before abandonment. The double-construction system over 50 kilometers likely enabled constant operation for maintenance, highlighting the ingenuity of ancient engineers.
New research from Aarhus University and UC Davis investigates the interaction between soil types and snake-inspired surface geometries. The study found that piles with asymmetric micro-structural features increase load-bearing capacity in sand, reducing resistance during installation by 25-50%.
Historical documents reveal that mathematician Mitsuyoshi Yoshida was invited by the Kumamoto clan to stay in Kumamoto from Kyoto between 1636 and 1637. He brought cutting-edge knowledge of arithmetic systems, civil engineering, and hydraulic technologies. The documents also show that he will be paid for his services, including rice pr...
Researchers at UBC Okanagan have conducted extensive wind testing on tall mass-timber buildings and found that they can withstand high-wind events up to 20 storeys. However, for taller buildings, aerodynamic and structural improvements are needed to address excessive wind-induced motion.
Researchers developed sustainable shotcrete mixes with improved durability, using granulated blast furnace slag and ultrafine limestone powder to increase resistance against sulphate attack. This reduces maintenance costs and extends tunnel lifespan, making shotcrete a more environmentally friendly material.
A new study has quantified the extent of human development in oceans for the first time, mapping an area of approximately 30,000 square kilometers modified by human construction. This footprint is comparable to urbanized land and greater than some natural habitats like mangrove forests and seagrass beds.
Researchers analyzed medieval and modern case studies to identify restrictive soil and geologic conditions for tunneling. They found arid areas with low permanent water tables are most susceptible to successful tunneling, recommending monitoring for sound and vibrations to disrupt smugglers.
A systematic literature review by academics at UCL found that no single factor causes megaproject failures, but rather a combination of six key themes. The study identified 54 preventative solutions to improve megaproject performance, including designing system architecture and engaging institutions and communities.
Researchers developed cognitive ground-penetrating radar technology, enabling real-time underground infrastructure mapping and inspection. The technology has been showcased at the National Smart Cities Conference and won a Smart 50 Award, aiming to reduce construction permits from 18 months to hours.
Dr. Junliang Tao receives $500,000 grant to apply burrowing strategies from nature in underground construction technologies and small-scale robots. His project aims to improve high-efficiency tunnel design and generate enthusiasm among K-12 students for STEM education.
Researchers at James Cook University found that complex roof shapes can lead to high forces on connections between the roof and house frame, increasing the risk of roof cladding loss. Poorly maintained houses or minor construction defects can exacerbate this issue.
Dr. Tom Iseley, a Louisiana Tech University professor and director of the Trenchless Technology Center, has been recognized as a 2016 UCTA MVP by the Underground Construction Technology Association. He is being honored for his contributions to the underground infrastructure industry, spanning nearly 40 years.
Bishal Upreti's research has practical implications in earthquake landslide hazard assessment, mineral exploration, and water resource development. His work maps active faults to evaluate seismic hazard in the Nepal Himalayan region.
Researchers discovered fire ants can excavate tunnels regardless of grain size, with moisture affecting only dry soils. The ants use mechanical factors and capillary forces to build stable structures.
Researchers have created a stand-alone molecular motor with multiple components that can move independently, opening the door to creating nanoscale devices. The motor uses thermal excitation and electron energy to rotate clockwise and counterclockwise.
A $1.25 million research grant is funding a five-year project to develop new methods of assessing rock strength, reducing hazardous working conditions in mining and construction. The goal is to improve ground stability analysis and reduce the thousands of annual deaths caused by accidents.
Researchers found that great desert burrowing skink families construct complex tunnel systems with up to 20 entrances, extending over 13 meters. Multiple generations participate in the process, suggesting a unique insight into lizard evolution and family cooperation.
The Water Tunnel of the Americas (WTAPC) will be the largest and most advanced facility, enabling researchers to test models of structures and determine forces of extreme weather on buildings and structures. The 'green' project uses a blow-down water tunnel design generating power from the Panama Canal.
The DFG approved twelve new Collaborative Research Centres to explore various research topics including the molecular interactions of immune response in pneumonia, innovative programming techniques, and materials for bone regeneration. The new centres aim to advance our understanding of complex phenomena and develop new therapies.
A team of mathematicians has developed a method to design underground lines that bypass historical monuments, minimizing economic loss and ensuring safe distances. The study applies Voronoi diagrams to create optimized routes, offering non-disruptive solutions for the construction of line 2 in Seville.
The National Science Foundation has authorized $29.1 million for the preliminary design of DUSEL, a deep underground science and engineering laboratory in South Dakota. The facility will house experiments in physics, engineering, geoscience, and biology, shielded from cosmic rays and accessible to unique geological areas.
The LCLS X-ray free electron laser will enable breakthrough science and imaging at the atomic scale, with initial funding of $54 million. Construction is set to begin in 2006, with a new center for ultrafast science expected to be operational by 2009.
A team of engineers at Northwestern University has developed a method for precisely aligning multiple types of molecules on a silicon surface at room temperature. This breakthrough enables the construction of nanoscale systems such as molecular transistors or light-emitting diodes, and paves the way for integrating with current technol...
A new grant from NSF's ITR Program will support the development of an integrated system, AMADEUS, which uses IT for real-time data gathering and computational modeling. This can lead to safer, more efficient, and economical underground construction methods.
Scientists verify King Hezekiah's role in constructing the Siloam Tunnel by dating organic material and stalactites within the tunnel. The findings refute a recent claim suggesting a much later date for the tunnel.
Researchers have developed a web-based project to familiarize drivers with Boston's new Big Dig routes. The Web Big Dig Drive provides detailed information on signage, pavement markers, and side barriers, helping commuters and travelers adjust to the changes ahead of time.
Erik Westman aims to reduce fatalities, lower construction costs, and improve environmental protection through a practical method for predicting failures in rock masses. He's adapting tomographic imaging technology for field use, enabling engineers to monitor stress redistribution in rock masses.
Researchers at Newcastle University are using satellites to measure 'bouncing' landscapes, which can affect the accuracy of large construction projects. The study aims to improve the accuracy of surveying data by 10 times, reducing costs by a significant margin.
Dr Vute Sirivivatnanon has won the Mohan Malhotra Award for his work in turning industrial waste into a useful component of concrete. His research resulted in the development of High Slag cement concrete, High Volume Fly Ash concrete and Silica Fume concrete being used in high-profile construction projects.
CHESS is building a major addition dubbed G-Line, which will produce X-rays at intensity levels five to 50 times greater than existing lines. The new facility will support 80 percent of research time for Cornell personnel.
A recent excavation at the Pyramid of the Moon in Teotihuacan has uncovered a skeleton and 150 surrounding artifacts dating back to approximately 100 A.D. The burial is suspected to have belonged to one of the city's rulers, providing critical information that could revolutionize modern understanding of Teotihuacan's culture and history.
Purdue University researchers are constructing a Mach 6 wind tunnel to study supersonic airflow and its effects on aircraft. The new facility will conduct experiments in airstreams traveling at six times the speed of sound, producing a quiet-flow Reynolds number of 13 million.
A gravity survey conducted in a Portland rail tunnel has helped identify previously unknown faults in the area. The survey revealed irregularities that suggest seismic activity, with data set to inform detailed maps of the subsurface.