Search results for: Free PDF Quiz 2024 High Hit-Rate EMC D-PM-IN-23 Latest Test Report 🍂 Search for ✔ D-PM-IN-23 ️✔️ and download exam materials for free through [ www.pdfvce.com ] 🦞Questions D-PM-IN-23 Exam
-
Groundwater in Mining
Ian Hair & Detlef Bringemeier
-
55th Rankine Lecture: Hazard, Risk and Reliability in Geotechnical Practice
Dr. Suzanne Lacasse, Norwegian Geotechnical Institute (NGI)
-
Lessons from the Yallourn Batter Failure Inquiry
Adjunct Professor Tim Sullivan
-
In-Situ Testing, CPTU: Theory, Application and Interpretation
Various speakers
-
Rock mesh application in highly fractured basalt rock cutting in Western Ring Road widening project Melbourne – a case study
Widening of Melbourne’s M80 Western Ring Road carriageway required a significant vertical rock cut leading to a new fill embankment for the Moonee Ponds Creek crossing. The rock comprised highly fractured and variably weathered Newer Volcanics basalt. Excavation in other sections of the project in similar fractured basalt had led to significant overbreak. For a conventional concrete faced soil nail solution, similar overbreak in this rock cut was considered to create an appreciable budget overrun not only due to the additional volume of concrete required to fill in the overbreak, but also for the additional steel volume in the nails to support the weight of the thicker concrete facing. To overcome this, a combined rock nail and rock mesh retention system was adopted where a composite action provided restraint for both global and local face stability. Detailed assessment was necessary to determine the interaction between the local rock mesh facing support and the global support afforded by the nails and considerable effort was made to develop an installation procedure allowing construction of the system to be undertaken safely and efficiently. The final rock nail/rock mesh solution minimised the amount of steel and concrete required to support the rock giving a more sustainable solution than originally proposed.
The construction of the rock cut involved the installation of about 400 rock nails and was completed in 2 months at the end of 2011.
-
Geotechnical risk: It’s not only the ground
A significant amount of geotechnical risk discussion relates to ground model development and the identification of geotechnical hazards. However, there is a considerable amount of risk hidden in the interpretation of parameters, design methods adopted, software used, and even the team members chosen for a project. This paper presents a discussion on these challenges and highlights the need for better communication of risk to other designers, contractors and clients. Technical and team management recommendations are made.
-
Strengthening Reinforced Earth Walls — Knox Road Duplication Case Study
In 1979, The Reinforced Earth Company (RECO) designed and supplied Reinforced Earth walls (REWs) at Knox Road bridge over main Western rail line at Doonside, NSW. The arrangement comprised a pair of abutments spanning over rail. In 1979, the REWs were constructed with two traffic lanes on the Eastern side (Stage 1), and with provision for a further two traffic lanes to be added on the Western side (Stage 2). Between 1979 and 2011, the Western side of the abutments were left in a relatively unfinished condition in readiness for the Stage 2 abutment to be constructed.
The original design of the REWs was carried out on the assumption that when the Stage 2 duplication was to occur, the same abutment beam seat, relative founding level and bridge loading would apply. However, the Stage 2 duplication design, developed in 2011, required a larger abutment beam seat and significantly higher bridge loads than the original design assumed. This meant that there was insufficient earth reinforcement capacity within the existing REW structure to safely support the new bridge loading.
To increase the existing capacity, additional galvanised metallic soil reinforcing strips (RE strips) were incorporated into the REWs. This increase in capacity was achieved by a combination of installing new reinforcing strip connections to existing panels and fabricating new facing panels. The work involved a staged construction process with the initial stage comprising removal and replacement of under-strength panels and retro-fitting with new reinforcing strip connections. The second stage of construction comprised conventional construction of the REW to the new finished surface level incorporating newly fabricated facing panels. Impact on existing road and rail users was paramount during the design and construction of the bridge. It was important to keep the existing road open as much as possible, and the reduce the amount of works in the Rail Corridor. This Case Study presents an innovative method of strengthening existing structures, while reducing costs and construction impacts on both road and rail users in an urban environment.