摘要:
The invention relates to an acoustic barrier wall made of prefabricated parts, preferably of artificial stone, concrete or the like, characterized in that the prefabricated parts comprise transverse supporting structures and longitudinal wall panels, these parts being arranged so that they can be joined together to form a retaining cage which becomes stepwise narrow towards the top, for containing fill material, for example earth.
摘要:
Disclosed is a noise barrier which comprises a hollow-cell type block having as its principal components a perforated sound-absorbing plate opposed to the noise source and a sound-insulating plate disposed opposite said sound-absorbing plate and incorporating therebetween a sound-absorbing material, a free spacing plate disposed behind said block across an intervening free air layer and means for absorbing and damping sound energy (a vibration-repressing coupling). There is also disclosed a noise barrier having a plurality of adjacent hollow-cell type blocks provided jointly with a free spacing plate by the medium of a support column so as to cover the supporting face.
摘要:
A noise barrier having a large magnitude of transmission loss is disclosed which is formed of a cell-box-type noise barrier comprising (A) a hollow cell-type block having a perforated sound-absorbing plate disposed on the side confronting the source of noise and a sound-insulating plate disposed on the opposite side relative to said perforated sound-absorbing plate and incorporating therein a sound-absorbing material and (B) a free-spacing plate disposed opposite said sound-insulating plate across a space and held in position by the medium of an elastic member, with a free air layer intervening between said free-spacing plate and said sound-insulating plate. Also disclosed is a method for insulating noise by providing a free-spacing plate at a distance from a noise source in such a way as to create a free air layer.
摘要:
A sound insulation wall having good sound reflection and/or sound absorption properties, high resistance to weathering, resistance to stress, can be easily assembled and has a relatively low weight per unit area can be made in boards 5 to 20 cm in thickness from composite rubber materials comprising rubber shavings having a volume of which is mostly 1 to 20 cm.sup.3 incorporated with a binder of reactive resin.
摘要:
This invention relates to a sound insulating building block that insulates, absorbs or irregularly reflects incident sound waves. The block contains a cover therein. The cover contains a sound absorbing plate formed into a plate shape of mineral fibers such as glass wool or asbestos or other ordinary fibers additionally attached to the mineral fibers. The sound absorbing plate is inserted into the cover in tight contact with the inside of the cover and the cover is then received into an open block made of mineral matter such as concrete and having side plates on the circumference. The cover is provided on its facing panel with slits or holes designed to face the open portion of the block.
摘要:
A noise abating wall including piers with integral column members, columns each including two laterally extending wing walls, and a spandrel panel. The piers are secured in spaced ground holes with column members extending vertically from the pier securing the columns in a vertical orientation with the wing wall outer sides having a selected spacing from one wing wall of an adjacent column. The spandrel panels are wider than the selected spacing of wing walls of adjacent columns whereby the spandrel panel sides overlap the sides of adjacent wing walls. First connectors on the spandrel panel front face adjacent both of the panel opposite sides and second connectors on the wing wall rear faces adjacent the wing wall outer sides connect together to secure the overlapping walls and spandrel panels in substantially face to face contact.
摘要:
Various implementations include a sound barrier panel including first and second polymeric foam portions, a rubber membrane, and a polyurea coating. The first and second polymeric foam portions each have a first surface, a second surface opposite and spaced apart from the first surface, a first end, a second end opposite and spaced apart from the first end, a top end, and a bottom end opposite and spaced apart from the top end. The second surface of the first polymeric foam portion abuts a first surface of the rubber membrane, and a second surface of the rubber membrane abuts the first surface of the second polymeric foam portion. The polyurea coating covers at least the first surface of the first polymeric foam portion and the second surface of the second polymeric foam portion.
摘要:
A lateral support device for stabilizing an elongate foundation post installed in a substrate. The lateral support device may include at least one engagement member for engaging the elongate foundation post. The lateral support device may also include a support plate extending from the at least one engagement member. The support plate may have a plate width greater than a post width of the elongate foundation post. The support plate may be slidable relative to the foundation post in an elongate direction when the at least one engagement member engages at least a portion of the elongate foundation post. When the engagement member is in an engaged position, at least a portion of the support plate is below the grade of the substrate.
摘要:
A protection device (5a) for motorcyclists, adapted to be secured to a road safety barrier (1) with a plurality of poles (3) regularly spaced out, the protection device (5a) including a longitudinal beam (6a) and a spacer (7a) extending longitudinally alongside the rear side of at least one part of the beam (6a) and adapted to be secured to the poles, wherein the beam (6a) and the spacer (7a) are assembled together so as to define, in the part of the beam, a longitudinal damping volume (V) with a closed cross-section.