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
-
Shrink-swell index database for Melbourne
A series of laboratory tests have been performed, including shrink-swell, liquid limit, plastic limit, linear shrinkage and soil suction on soil samples collected from 47 different field sites across 37 suburbs of Melbourne. The sites cover a wide range of soils and different geological conditions and geographical settings. The results of the laboratory tests were used to establish a database of tested shrink-swell index (Iss) values. An interactive map showing the distribution and reactivity of Melbourne soils has been developed that can be used in routine practice by local engineers to assess and calibrate the shrinkage indices estimated on a visual-tactile basis. The study indicates that there is a significant variation in Iss results across any particular soil type and that a blanket estimated value based on that soil type may not be entirely appropriate. Highly reactive soils are mainly present in the western and northern suburbs of Melbourne, and many of these areas have a shrink-swell index higher than 6% strain /pF. Correlations of shrink-swell index, liquid limit, plastic limit, plasticity index and linear shrinkage have also been attempted and the results show that simple index tests are not a reliable substitute for Iss testing.
-
Kaikōura Earthquake Recovery
Brian Kirtlan
-
Sand Filled Geotextile Structures: Design And Durability
The use of geotextile sand containers (GSC’s) as shoreline protection systems has grown moderately since the first applications in the 1970s. This can be attributed to two factors; firstly, the lack of understanding of coastal processes and design fundamentals by the larger Geosynthetic community in order to provide coastal engineers with suitable solutions and secondly there has been very little rigorous scientific wave flume testing with which to analyse the wave stability of geotextile sand containers.
The application of geotextile containers in coastal protection works can be traced back to early works carried out in 1970s. The application of these types of structures was somewhat haphazard as very little was understood about the wave stability and durability of the structures. Early wave stability work was carried out Ray (1977) and Jacobs (1983) with small containers, however the testing programs were limited and did not provide sufficient confidence in the product to carry out comprehensive engineering design. As a result, the technology until recently has relied on manufacturers design suggestions based on monitoring of actual structures. Over the past five years, the global warming and the sea level rise debate has resulted in more emphasis being placed on shoreline protection systems. Geotextile manufacturers have responded to the challenges put forward by design engineers and intensive research has been carried out in the field.
This paper covers the key issues which will ensure the long term integrity of a geotextile shoreline protection system is maintained, these issues include:
Wave stability
Detailed analysis of recent large scale wave flume testing which assess filling capacity, size of container, structure slope and scour protection etc.Container/geotextile durability
Methods and specifications used to limit the effects of the fundamental factors affecting the life span of geotextile containers such as vandal resistance, UV degradation and abrasion resistance etc.This paper outlines the “state of the art” in terms of the design and specification of geotextile sand containers (GSC).
-
Treatments Of Existing Abutment Rsw Using Permeation Grouting And Horizontal Soil Nailing
The construction of Bangalow Interchange on the Pacific Highway Upgrade Project was undertaken using a staged approach. All traffic was initially diverted onto the northbound carriageway of the existing Pacific Highway whilst the southbound carriageway was decommissioned and excavated down to a maximum of 6.7m below the existing fill embankment surface. A temporary soil nail retaining wall was required to support the vertical cut face at the median. The temporary wall and the northbound carriageway would be decommissioned after the interchange construction work.
One challenge to the temporary design was the presence of a Reinforced Soil Wall (RSW) at the abutments of the existing twin bridges over Bangalow Road. The proposed temporary wall alignment was to cut through the middle of the RSW block in order to allow the eastern half of the RSW block, along with the southbound bridge, to be removed. The diverted traffic was to travel over the existing northbound bridge, which would be supported by the remaining western half of the RSW block. One further challenge was that the existing RSW abutments were designed to support the bridge sill beams without any pile foundations.
This paper focuses on the design treatment of the existing bridge abutment subjected to partial demolition of the abutment RSW. Initially, the adopted strategy was to inject low pressure permeation grout into the existing RSW block prior to excavation. A grouting trial was conducted, which indicated that because of the presence of the relatively high fines content within the existing RSW, the injected grout was unable to permeate through the RSW fill to form a coalesced grouted mass. An alternative support system using horizontal soil nailing was subsequently adopted through the vertical cut of the abutment RSW. The design of the horizontal soil nails would not only need to satisfy the stability requirements but also require controlling the movements of the RSW to within a tolerable limit. A comparison of the survey monitoring results with the design predictions of the wall movements is outlined.
-
Guildford Formation
The Guildford Formation underlies a significant portion of the central business district and the eastern suburbs of Perth. The Formation is characterised by its variability in terms of consistency, strength, compressibility and water yielding characteristics. This paper addresses geotechnical issues associated with developments taking place over Guildford Formation alluvium.
-
Utilization of fly ash in local Sarawakian peat soil stabilization
The present paper describes the utilization of fly ash (FA) for the purpose of soil stabilization of Sarawakian peat. The peat soil and FA samples were collected from Matang and Sejigkat thermal power station, respectively and tested in laboratory to evaluate their different physical and geotechnical properties mainly compaction, unconfined compressive strength (UCS) and the California bearing ratio (CBR) test. Different physical properties of peat soil and fly ash samples play an important role in the process of enhancing the strength of peat soil. The results show that UCS value increases with the increase of FA and curing periods. The CBR values also increase with the increase of FA at 96 hours soaking period. The results also demonstrate that, the UCS and CBR values were slightly decreased after addition of 20% FA. Therefore, locally available waste FA can be utilized with local peat for stabilization purposes which will reduce the disposal problem.