188 Used software: ESA-Prima Win CAE Special Projects 5 B.V. Ingenieursbureau M.U.C. Contact Daphne de Groote Address Bredaseweg43 4844 CK Terheijden, Netherlands Phone +31 76-5933450 Email [email protected] Website www.bv-muc.com B.V. Ingenieursbureau M.U.C. (Meeuwsen-UdinkConsult) has been established in 1981 and is as a complete independent advisory engineering company active in civil/mechanical engineering, amongst others: soil mechanics, hydraulic engineering and highway construction, the structural sector and on the mechanical engineering and shipbuilding. The office staff finds her background in the Dutch Civil Engineering and in the Geotechnical as well as environmental consultancy practice. B.V. Ingenieursbureau M.U.C. works as a design and engineering company for amongst others civil contractors, building contractors, architects, the government, other engineering offices, private companies. The operations are executed for about 500 different clients, companies and institutes at home and abroad. The current organisation of B.V. Ingenieursbureau M.U.C. comprises 25 employees (a.o. 6 MSc and 6 BSc). Before 1981 both Mr. Udink and Mr. Meeuwsen worked within the Royal Boskalis Westminster Dredging company of Holland. Boskalis is the world’s biggest dredging company. An important part of the activities of B.V. Ingenieursbureau M.U.C. concerns consultancy, project management engineering and supervision which has to do with amongst others: • Technique of foundation, including civil technical, mechanical engineering (hydraulic systems, etc.) and shipbuilding aspects (pontoons, etc.); • Soil mechanics and geo hydrology; • Civil engineering and structural aspects in general; • Specialist constructions in concrete, steel, wood, stone and aluminium; • Damage-assessment; • Special measurements on foundations and measurements in the soil. As a resume one could say that since 1981, B.V. Ingenieursbureau M.U.C. is involved in design and execution works for all kinds of infrastructural works in The Netherlands and abroad: (Tunnels, ports, high speed and cargo railways, motorways, bridges, flyovers, noise reducing structures, housing, warehouses, high rise buildings, car-parking-sub ground facilities, jetties, quay walls, industrial plants (oil, food, petrochemical), etc., etc.). Specialism for all fields mentioned often is foundation techniques. Introduction B.V. Ingenieursbureau M.U.C. te Terheijden received from subcontractor Van Campen Aluminium B.V. the order to make the calculations of an aluminium acoustic screen for the project: “Geluidbeperkende voorzieningen randweg Eindhoven”. The project concerns a 6.0 and 3.0 m high acoustic screen, composed of aluminium tubes, with diameters of 150 mm and 200 mm; which pattern is random assembled in an aluminium box construction. The box construction is a prefab element with a length of 3.1 m and a width of 1.0 m. The boxes are alternating turned over 180°. The random pattern is accentuated by a variable height of each individual tube, which besides a different length, also have a different colour. As the screen has an acoustic function, the tubes are perforated over the whole length; inside the tube, an absorbing filling is placed for extra noise reducing. The tubes are all connected by aluminium strips of 3.0 mm. The tubes have only a thickness of 3.0 mm, the thickness is restricted to the perforations to be made. Calculations The calculations are made for the 6.0 m high acoustic screen. Overall Description In figure 01, an isometric view is shown. The random pattern is shown in figure 02. The thickness of the tubes is 3.0 mm. For the input of the correct characteristics of the tubes in the FEM program, a conversion is made. The connection of the tubes with the box construction is as followed: The aluminium box construction has a height of 0.4 m. In the top plate, cut-outs are foreseen, through which the tubes are placed in. The tubes are horizontally fixed facing the top plate. The connection to the under plate will be made by 2 stainless steel bolts for each tube. These bolts will be tightened in the gaps of the connecting strips. The bolts take care of the horizontal fixation facing the under plate. The aluminium box construction is founded on its 4 corners on piles with pile head, where the anchors are already foreseen. At the location of the anchors, the under plate is more loaded. Because of this, the under plate will be locally strengthened. Because of the anodic treatment, in the bottom are water grooves, these openings are taken into account in the calculations. Traffic noise reducing barrier, Eindhoven The project regards an acoustic screen, composed of 6.0 m high aluminium tubes, with variable diameters, random assembled in a box construction. This random pattern is accentuated by a variable height of the tubes which all have a different length and color. The tubes are connected by aluminium strips and perforated over the whole length, inside the tubes is an absorbing filling which is placed for extra noise reducing. The tubes are hold into an aluminium box construction, the upper plate has cutouts, the tubes are horizontally fixed. At the bottom, bolts take care of the horizontal fixation. Because of the anodizing process, in the bottom are grooves leaved open, the openings are taken into account in the calculations. Owner: Rijkswaterstaat Noord-Brabant Architect: VHP Architecten uit Rotterdam General Contractor: Heijmans Techniek & Mobiliteit Engineering Office: B.V. Ingenieursbureau M.U.C. Construction Start: 03/2009 Construction End: 12/2009 Location: Eindhoven, Netherlands Project Information Short Description
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