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Maldon, New South Wales
Maldon is a locality in the Macarthur Region of New South Wales, Australia, in the Wollondilly Shire. In the it had a population of 15. History Railway A station was established at Maldon, as part of the Great Southern Railway, in 1879. It was originally named Wilton. The station closed in 1976. Maldon is still an active rail location, having turnouts for freight trains bringing limestone to the cement works, and grain to the flour mill. In 1983, the NSW government commenced construction of an electrified rail link between Maldon and Dombarton (near Wollongong), improving access for coal trains to Port Kembla. The contract for construction of the Avon Tunnel was cancelled in mid-1988: the line was not thought economically viable. An incomplete rail bridge across the Nepean Gorge can be seen just north of the Picton Road bridge. Maldon Suspension Bridge Maldon was also the site of 'Harvey's Crossing', one of two stone causeways over the Upper Nepean River on the Picton ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macarthur, New South Wales
Macarthur is a region in the south-west of Sydney, in the state of New South Wales, Australia. The region includes the local government areas of the City of Campbelltown, Camden Council, and Wollondilly Shire. It covers an area of 3,067 square kilometres and has a population of close to 310,000 residents. The region geographically forms the foothills between the Blue Mountains and Southern Highlands regions. The region is bounded at the north by Glenfield; at the south by Yanderra; at the east by the town of Appin; and at the west by the hamlet Nattai. Most of the area is taken up by the semi-rural Wollondilly Shire; most of the population lives within the satellite city of Campbelltown and its surrounding suburbs. The region is one of the fastest-growing regions in the Sydney metropolitan area, with many new modern suburbs sprouting up in recent decades such as Glen Alpine, Macquarie Links, Harrington Park, Blair Athol, Mount Annan, Currans Hill, Englorie Park ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retaining Wall
Retaining walls are relatively rigid walls used for supporting soil laterally so that it can be retained at different levels on the two sides. Retaining walls are structures designed to restrain soil to a slope that it would not naturally keep to (typically a steep, near-vertical or vertical slope). They are used to bound soils between two different elevations often in areas of terrain possessing undesirable slopes or in areas where the landscape needs to be shaped severely and engineered for more specific purposes like hillside farming or roadway overpasses. A retaining wall that retains soil on the backside and water on the frontside is called a seawall or a bulkhead. Definition A wall for holding in place a mass of earth or the like, as at the edge of a terrace or excavation. A retaining wall is a structure designed and constructed to resist the lateral pressure of soil, when there is a desired change in ground elevation that exceeds the angle of repose of the soil. A basement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truss
A truss is an assembly of ''members'' such as beams, connected by ''nodes'', that creates a rigid structure. In engineering, a truss is a structure that "consists of two-force members only, where the members are organized so that the assemblage as a whole behaves as a single object". A "two-force member" is a structural component where force is applied to only two points. Although this rigorous definition allows the members to have any shape connected in any stable configuration, trusses typically comprise five or more triangular units constructed with straight members whose ends are connected at joints referred to as ''nodes''. In this typical context, external forces and reactions to those forces are considered to act only at the nodes and result in forces in the members that are either tensile or compressive. For straight members, moments (torques) are explicitly excluded because, and only because, all the joints in a truss are treated as revolutes, as is necessary for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Girder
A girder () is a support beam used in construction. It is the main horizontal support of a structure which supports smaller beams. Girders often have an I-beam cross section composed of two load-bearing ''flanges'' separated by a stabilizing ''web'', but may also have a box shape, Z shape, or other forms. Girders are commonly used to build bridges. A girt is a vertically aligned girder placed to resist shear loads. Small steel girders are rolled into shape. Larger girders (1 m/3 feet deep or more) are made as plate girders, welded or bolted together from separate pieces of steel plate. The Warren type girder replaces the solid web with an open latticework truss between the flanges. This arrangement combines strength with economy of materials, minimizing weight and thereby reducing loads and expense. Patented in 1848 by its designers James Warren and Willoughby Theobald Monzani, its structure consists of longitudinal members joined only by angled cross-members, formi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beam Bridge
Beam bridges are the simplest structural forms for bridge spans supported by an abutment or pier at each end. No moments are transferred throughout the support, hence their structural type is known as '' simply supported''. The simplest beam bridge could be a log (see log bridge), a wood plank, or a stone slab (see clapper bridge) laid across a stream. Bridges designed for modern infrastructure will usually be constructed of steel or reinforced concrete, or a combination of both. The concrete elements may be reinforced, prestressed or post-tensioned. Such modern bridges include girder, plate girder, and box girder bridges, all types of beam bridges. Types of construction could include having many beams side by side with a deck across the top of them, to a main beam either side supporting a deck between them. The main beams could be I-beams, trusses, or box girders. They could be half-through, or braced across the top to create a through bridge. Because no moments ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernest Macartney De Burgh
Ernest Macartney de Burgh (; ; 18 January 1863 – 3 April 1929) was an Irish-born Australian civil engineer, chief-engineer for water supply and sewerage in New South Wales. Early life De Burgh was the youngest son of the Rev. William de Burgh, D.D., and his wife Janette, née Macartney. He was born at Sandymount, County Dublin, Ireland. He was educated at Rathmines school and the Royal College of Science for Ireland, and was for some time employed on railway construction in Ireland. Engineering in Australia De Burgh then migrated to Australia, arriving in Melbourne on the ''Orient'' 21 March 1885. Travelling to Sydney de Burgh immediately obtained a position in the New South Wales public works department and was engaged on survey work for Sydney's southern outfall sewer. In 1887 he was sent to the countryside in charge of the construction of steel bridges, and eventually became engineer of bridges. He was in this capacity responsible for several bridges over the Murray, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suspension Bridge
A suspension bridge is a type of bridge in which the deck (bridge), deck is hung below suspension wire rope, cables on vertical suspenders. The first modern examples of this type of bridge were built in the early 1800s. Simple suspension bridges, which lack vertical suspenders, have a long history in many mountainous parts of the world. Besides the bridge type most commonly called suspension bridges, covered in this article, there are other types of suspension bridges. The type covered here has cables suspended between towers, with vertical ''suspender cables'' that transfer the Structural load#Live load, imposed loads, transient load, live and Structural load#Dead load, dead loads of the deck below, upon which traffic crosses. This arrangement allows the deck to be level or to arc upward for additional clearance. Like other suspension bridge types, this type often is constructed without the use of falsework. The suspension cables must be anchored at each end of the bridge, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maldon Bridge 1903
Maldon (, locally ) is a town and civil parish on the River Blackwater, Essex, Blackwater estuary in Essex, England. It is the seat of the Maldon District and starting point of the Chelmer and Blackwater Navigation. It is known for Maldon Sea Salt which is produced in the area. History Early and medieval history The place-name ''Maldon'' is first attested in 913 in the ''Anglo-Saxon Chronicle'', where it appears as ''Maeldun''. Maldon's name comes from ''mǣl'' meaning 'monument or cross' and ''dūn'' meaning 'hill', so translates as 'monument hill'. East Saxons settled the area in the 5th century and the area to the south is still known as the Dengie Peninsula after the Dæningas. It became a significant Anglo-Saxon England, Saxon port with a hythe or quayside and artisan quarters. Evidence of imported pottery from this period has been found in archaeological digs. From 958 there was a royal mint issuing coins for the late Anglo-Saxon England, Anglo-Saxon and early Norman dy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nepean Gorge
The Nepean Gorge is a gorge on the Nepean River west of Sydney, New South Wales, Australia. The gorge is located south of the western suburb of Penrith and is administered and protected by the National Parks and Wildlife Service. It is carved through the sandstone typical of the region, Hawkesbury sandstone. There is some speculation as to why it runs through the eastern edge of the Blue Mountains rather than around it. The gorge is popular for water recreation by small watercraft all year. Lookouts above the gorge are accessible by dirt roads on both banks and the area is steeped with Aboriginal history. Evidence of prehistoric volcanic activity in the area also exists in the soil and stone of nearby hills. See also *Hawkesbury River The Hawkesbury River, or Hawkesbury-Nepean River, is a river located northwest of Sydney, New South Wales, Australia. The Hawkesbury River and its associated main tributary, the Nepean River, almost encircle the metropolitan region of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Kembla, New South Wales
Port Kembla is a suburb of Wollongong 8 km south of the CBD and part of the Illawarra region of New South Wales. The suburb comprises a seaport, industrial complex (one of the largest in Australia), a small harbour foreshore nature reserve, and a small commercial sector. It is situated on the tip of Red Point (Port Kembla), Red Point: its first European sighting was by Captain James Cook in 1770. The name "Kembla" is an Aboriginal Australians, Aboriginal word meaning "plenty [of] wild fowl". History Before Port Kembla was an industrial suburb of Wollongong, it was a town with a remarkably self-sufficient society, a growing commercial centre, and a vibrant civic life. Town subdivision began in 1908, and by 1921 there were 1622 residents. Economic expansion propelled further population growth. Port Kembla derives its name from its proximity to Mount Kembla. Industrial change A copper smelter and refinery, the Electrolytic Refinery and Smelting Company of Australia, began pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wollongong, New South Wales
Wollongong ( ), colloquially referred to as The Gong, is a city located in the Illawarra region of New South Wales, Australia. The name is believed to originate from the Dharawal language, meaning either 'five islands/clouds', 'ground near water' or 'sound of the sea'. Wollongong lies on the narrow coastal strip between the Illawarra Escarpment and the Pacific Ocean, 85 kilometres (53 miles) south of central Sydney. Wollongong had an estimated urban population of 302,739 at June 2018, making it the third-largest city in New South Wales after Sydney and Newcastle and the tenth-largest city in Australia by population. The city's current Lord Mayor is Gordon Bradbery AM who was elected in 2021. The Wollongong area extends from Helensburgh in the north to Windang and Yallah in the south. Geologically, the city is located in the south-eastern part of the Sydney basin, which extends from Newcastle to Nowra. Wollongong is noted for its heavy industry, its port activity and the qual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
