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
-
2020 AGS Victorian Symposium
Sustainable Geotechnics – Excellence in Planning, Design and Construction
Professor Arul Arulrajah, Patrick Wong and Ross Roberts
-
Liquefaction Potential Assessment And Pile Foundation Design For High Efficiency Gas Turbines And Compressors In Perth
This paper presents a case study of liquefaction potential assessment and pile foundation design for two high efficiency gas turbines and two gas compressors in Kwinana, Perth. Firstly the complexity of the local geology is described with a detailed discussion on the geotechnical risks of the potentially liquefiable loose sands or silty sands of 2 m to 3 m thickness at varying depths overlying the Tamala Limestone Formation which has potential cavities. The design criteria and the adopted geotechnical parameters for the developed geotechnical model are then discussed. A liquefaction potential assessment approach has been proposed after critical review of the currently published, with an emphasis on the importance of evaluating a suitable earthquake magnitude for a project site. Based on the results of liquefaction potential evaluation and the risk assessment of a number of options, pile foundations have been adopted for the gas turbine generators. A piling strategy has been developed for analysis, design, installation and testing for the proposed Franki piles founded on the Tamala Limestone Formation. The gas compressor raft foundations are to be founded on piles at a shallower depth above the liquefiable loose sandy layer to mitigate the potential risks of loosening/degradation effect of the cemented sands induced by the dynamic loads during the compressor operation. The assessed differential settlement induced by the potentially liquefiable sandy layer has been taken into account by the structural engineer for his detailed design and articulation of the reinforcement.
-
AGS Perth Symposium 2024
Optimizing the Project Life Cycle: The Role of Geotechnical Professionals
-
Designing For Seismic Events – A Case Study
This paper presents a case study of the seismic design for a multi-level car park constructed over soft Holocene alluvial deposits in Brisbane. The paper presents the design approach and the structural and geotechnical analysis undertaken to assess the earthquake induced impacts on the structure to demonstrate the adequacy of the proposed foundation design.
The paper highlights the following design aspects:
- The requirements of Clause 5.2.2 of the Australian Standards AS1170.4:2007 to provide tie beams may not be appropriate in all cases.
- The use of elastic response spectrum analysis using modal superposition methods can result in refined inertia forces on the foundation compared to those computed using pseudo-static methods.
- The earthquake-induced kinematic effect should not be overlooked with respect to total deformation of the foundation.
-
Deep Dry Soil Mixing – Performance And Quality Control Acceptance Criteria
The variability in strength and compressibility of in situ deep soil mixing (DSM) of soft soils can be greater than the variability of the natural soil. To achieve economy, sustainability and performance of DSM, it is essential that construction be carried out using an appropriate QA/QC program.
This paper presents the results on the use of DSM columns to support several embankments over soft clay in the Ballina Bypass and Pimlico to Teven Pacific Highway projects. The DSM work was carried out under the Roads and Maritime Services (RMS) Specification, with QA/QC testing procedures developed specifically for these projects. Embankments with contrasting performance are compared to the quality control test results which comprised laboratory testing of core samples as well as in situ test results such as pull-out and push-in vanes and conventional cone penetration tests. Settlement monitoring indicated that where the acceptance criteria are met measured settlements under embankment loading were generally less than predicted settlements. The observed settlement in an area with high organic content was twice the predicted value, although in all cases, post-construction settlement met the performance objectives.
Based on these results, recommendations on QA/QC testing procedures are made with the aim of improving economical and sustainable construction of the DSM ground improvement technique for soft soils.
-
The New UK Contaminated Land Regime
This paper attempts to produce an overview of the new UK contaminated land regime. Detailed consideration is given to a number of aspects of the new regime. The methodology by which it is proposed to implement the regime is discussed, including definitions of terms included in the Act. The concept of the “Appropriate Person” is described, as the definition of the person responsible for the contamination. This regime places renewed emphasis on land owners and local authorities being aware of potentially hazardous sites under their ownership. This in turn requires a much greater level of awareness and understanding of site risk assessment amongst these parties. With this in mind, this paper also describes a new Windows-based application to address the risk assessment of contaminated land, building on the methodology advocated by the Environment Agency. The application has four analysis tiers, and the ongoing development of these tiers is described.
-
Challenges For Solar Farm Pile Design In Reactive Soil
The procedures for the design of piles installed in clay, based on conventional soil mechanics theory, are part of the foundational knowledge of practising geotechnical engineers. Although it is common for different designers to recommend piles of varying dimensions, because of differences in their preferences for correlations and design details, the fundamental scientific approach is usually similar. Regrettably, this is not the case for the design of short piles in reactive clay, which has to rely on the continuing evolution of knowledge in unsaturated soil mechanics and contend with the scarcity of relevant publications on aspects of pile design.
This paper chronicles the on-going collaboration works involving practising geotechnical engineers from EIC Activities, a member of CIMIC Group, and academics from both The University of Sydney (USYD) and The University of NSW (UNSW) to establish some fundamental pile design input that can be agreed upon to design piles in reactive soil for solar farm projects. This paper will outline the two separate collaborations at UNSW and USYD focusing on the vertical and lateral pile design aspects, respectively, for solar farm micro piles. The collaboration at UNSW focussed on the axial design topic for a pile in reactive clay and at USYD, the collaboration dealt with the lateral design topic for a pile in unsaturated clay. -
Shear Strength Testing For Geotechnical Structures
As geotechnical engineers, we often poke our finger into soil or hit rocks with a hammer to provide information used to select material properties required for design. The observations made while visiting the site to use the finger or hammer provide valuable additional information about the site, including the setting, materials and geometry. In some cases the inspection and finger are sufficient in other cases, a combination of approaches, including laboratory testing should be undertaken to build confidence in the material properties adopted in our designs.
As a designer the more information we have about our problem, including the material properties, the more efficiently and safely we can design our structures. Geotechnical engineers have a good practiced of providing detailed specifications for placement of fill and although there is generally good control on fill placement there is often no specification for the shear strength limits or shear strength testing frequency. This paper provides some results of shear strength testing of fill material derived from sandstone tunnel spoil used for temporary retaining structures and working platforms on a recent infrastructure project. It has been portrayed that the extent of testing should be linked to the sensitivity to material properties, the complexity, size and cost of the structure being designed.