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Makatote Viaduct
The Makatote Viaduct (Bridge 179) takes the North Island Main Trunk railway (NIMT) across the Makatote River. It is from Wellington, at the foot of Ruapehu, in northern Manawatū-Whanganui (central North Island), between Erua and Pokaka. It was built between 1905 and 1908 for the Public Works Department (PWD), who passed it to New Zealand Railways Department (NZR) in 1909. When built it was tallest, and is now the third tallest, viaduct in New Zealand, the higher ones being the 1981 North Rangitikei , further south on the NIMT, and 1937 Mohaka viaduct , on the Gisborne line. Design and construction Like most of the other NIMT viaducts, Makatote was designed by Peter Seton Hay, later PWD Engineer-in-Chief. Spans 1, 2, 3, 9 and 10 are steel plate girders, spans 4-8 are steel Pratt trusses each long. Piers 1, 2, 3, 9, 10 and 11 are of reinforced concrete with piers 4 to 8 being steel trestles on reinforced concrete footings. Pier 6 is the highest. Tenders were cal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Island Main Trunk
The North Island Main Trunk (NIMT) is the main railway line in the North Island of New Zealand, connecting the capital city Wellington with the country's largest city, Auckland. The line is long, built to the New Zealand rail gauge of and serves the large cities of Palmerston North and Hamilton. Most of the NIMT is single track with frequent passing loops, but has double track - * between Wellington and Waikanae, except for of single-track through tunnels between North Junction ( from Wellington) and South Junction, ( from Wellington), on the Pukerua Bay to Paekakariki section, * between Hamilton and Te Kauwhata (except for the single-track Waikato River Bridge at Ngāruawāhia), and * between Meremere and Auckland Britomart. Around (approximately 65%) of the line is electrified in three separate sections: one section at 1600 V DC between Wellington and Waikanae, and two sections at 25 kV AC: between Palmerston North and Te Rapa (Hamilton) and between Papakura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mangaweka Deviation
The Mangaweka Deviation is a 7 km single track deviation of the North Island Main Trunk (NIMT) railway line in the central North Island of New Zealand, between the settlements of Mangaweka and Utiku, south of Taihape. Opened on 18 November 1981, by the Prime Minister, Robert Muldoon, it was constructed between 1973 and 1981 at a cost of $17m; to move the line away from geologically unstable land; and also to replace the high-maintenance steel viaducts including the Mangaweka Viaduct. It is the most recent and most significant deviation of the NIMT since it was opened in 1909. History The original section of the line was constructed as part of the NIMT in 1904. The entirety of the route from Marton north to Taihape was built to the west of the Rangitikei River and lies predominantly on the terraces within the river valley. Only south of Marton does the NIMT cross the Rangitikei en route to Palmerston North and Wellington. Between the settlements of Mangaweka and Utik ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whanganui River
The Whanganui River is a major river in the North Island of New Zealand. It is the country's third-longest river, and has special status owing to its importance to the region's Māori people. In March 2017 it became the world's second natural resource (after Te Urewera) to be given its own legal identity, with the rights, duties and liabilities of a legal person. The Whanganui Treaty settlement brought the longest-running litigation in New Zealand history to an end. Geography With a length of , the Whanganui is the country's third-longest river. Much of the land to either side of the river's upper reaches is part of the Whanganui National Park, though the river itself is not part of the park. The river rises on the northern slopes of Mount Tongariro, one of the three active volcanoes of the central plateau, close to Lake Rotoaira. It flows to the north-west before turning south-west at Taumarunui. From here it runs through the rough, bush-clad hill country of the King ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whanganui
Whanganui (; ), also spelled Wanganui, is a city in the Manawatū-Whanganui region of New Zealand. The city is located on the west coast of the North Island at the mouth of the Whanganui River, New Zealand's longest navigable waterway. Whanganui is the 19th most-populous urban area in New Zealand and the second-most-populous in Manawatū-Whanganui, with a population of as of . Whanganui is the ancestral home of Te Āti Haunui-a-Pāpārangi and other Whanganui Māori tribes. The New Zealand Company began to settle the area in 1840, establishing its second settlement after Wellington. In the early years most European settlers came via Wellington. Whanganui greatly expanded in the 1870s, and freezing works, woollen mills, phosphate works and wool stores were established in the town. Today, much of Whanganui's economy relates directly to the fertile and prosperous farming hinterland. Like several New Zealand urban areas, it was officially designated a city until an adminis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auckland Star
The ''Auckland Star'' was an evening daily newspaper published in Auckland, New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 List of islands of New Zealand, smaller islands. It is the ..., from 24 March 1870 to 16 August 1991. Survived by its Sunday edition, the ''Sunday Star'', part of its name endures in '' The Sunday Star-Times'', created in the 1994 merger of the ''Dominion Sunday Times'' and the ''Sunday Star''. Originally published as the ''Evening Star'' from 24 March 1870 to 7 March 1879, the paper continued as the ''Auckland Evening Star'' between 8 March 1879 and 12 April 1887, and from then on as the ''Auckland Star''. One of the paper's notable investigative journalists was Pat Booth, who was responsible for notable coverage of the Crewe murders and the eventual exoneration of Arthur Allan Thomas. Booth and the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christchurch
Christchurch ( ; mi, Ōtautahi) is the largest city in the South Island of New Zealand and the seat of the Canterbury Region. Christchurch lies on the South Island's east coast, just north of Banks Peninsula on Pegasus Bay. The Avon River / Ōtākaro flows through the centre of the city, with an urban park along its banks. The city's territorial authority population is people, and includes a number of smaller urban areas as well as rural areas. The population of the urban area is people. Christchurch is the second-largest city by urban area population in New Zealand, after Auckland. It is the major urban area of an emerging sub-region known informally as Greater Christchurch. Notable smaller urban areas within this sub-region include Rangiora and Kaiapoi in Waimakariri District, north of the Waimakariri River, and Rolleston and Lincoln in Selwyn District to the south. The first inhabitants migrated to the area sometime between 1000 and 1250 AD. They hunted moa, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Request For Tender
An invitation to tender (ITT, otherwise known as a call for bids or a request for tenders) is a formal, structured procedure for generating competing offers from different potential suppliers or contractors looking to obtain an award of business activity in works, supply, or service contracts, often from companies who have been previously assessed for suitability by means of a supplier questionnaire (SQ) or pre-qualification questionnaire (PQQ). The term "notice inviting tenders" (NIT) is often used in purchasing in India. An ITT differs from a request for quotation (RFQ) or a request for proposal (RFP), in which case other reasons (technology used, quality) might cause or allow choice of the second best offer. An RFP is a request for a price from a buyer but the buyer would also expect suggestions and ideas on how the project work should be done. RFPs are thus focused on more than just pricing/cost, they entail a bit of consulting from the contractor or vendor. The closest equ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shallow Foundation
A shallow foundation is a type of building foundation that transfers structural load to the earth very near to the surface, rather than to a subsurface layer or a range of depths, as does a deep foundation. Customarily, a shallow foundation is considered as such when the width of the entire foundation is greater than its depth. In comparison to deep foundations, shallow foundations are less technical, thus making them more economical and the most widely used for relatively light structures. Types of shallow foundation Footings are always wider than the members that they support. Structural loads from a column or wall are usually greater than 1000kPa, while the soil's bearing capacity is commonly less than that (typically less than 400kPa). By possessing a larger bearing area, the foundation distributes the pressure to the soil, decreasing the bearing pressure to within allowable values. A structure is not limited to one footing. Multiple types of footings may be used in a constr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trestle Bridge
A trestle bridge is a bridge composed of a number of short spans supported by closely spaced frames. A trestle (sometimes tressel) is a rigid frame used as a support, historically a tripod used to support a stool or a pair of isosceles triangles joined at their apices by a plank or beam such as the support structure for a trestle table. Each supporting frame is a bent. A trestle differs from a viaduct in that viaducts have towers that support much longer spans and typically have a higher elevation. Timber and iron trestles (i.e. bridges) were extensively used in the 19th century, the former making up from 1 to 3 percent of the total length of the average railroad. In the 21st century, steel and sometimes concrete trestles are commonly used to bridge particularly deep valleys, while timber trestles remain common in certain areas. Many timber trestles were built in the 19th and early 20th centuries with the expectation that they would be temporary. Timber trestles were us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reinforced Concrete
Reinforced concrete (RC), also called reinforced cement concrete (RCC) and ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials. In corrosion engineering terms, when designed correctly, the alkalinity of the concrete protects the steel rebar from corrosion. Description Reinforcing schemes are generally designed to resist tensile stresses in particular regions of the concrete that might cause unacceptable cracking and/or structural failure. Modern reinforced concrete can contain varied reinforcing materials made ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pier (architecture)
A pier, in architecture, is an upright support for a structure or superstructure such as an arch or bridge. Sections of structural walls between openings (bays) can function as piers. External or free-standing walls may have piers at the ends or on corners. Description The simplest cross section of the pier is square, or rectangular, but other shapes are also common. In medieval architecture, massive circular supports called drum piers, cruciform (cross-shaped) piers, and compound piers are common architectural elements. Columns are a similar upright support, but stand on a round base. In buildings with a sequence of bays between piers, each opening (window or door) between two piers is considered a single bay. Bridge piers Single-span bridges have abutments at each end that support the weight of the bridge and serve as retaining walls to resist lateral movement of the earthen fill of the bridge approach. Multi-span bridges require piers to support the ends of sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Span (engineering)
Span is the distance between two intermediate supports for a structure, e.g. a beam or a bridge A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually somethi .... A span can be closed by a solid beam or by a rope. The first kind is used for bridges, the second one for power lines, overhead telecommunication lines, some type of antennas or for aerial tramways. The span is a significant factor in finding the strength and size of a beam as it determines the maximum bending moment and deflection. The maximum bending moment M_ and deflection \delta_in the pictured beam is found using: :M_ = \frac :\delta_ = \frac = \frac where :q = Uniformly distributed load :L = Length of the beam between two supports (span) :E = Modulus of elasticity :I = Area moment of inertia Note that the maxim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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