Abstract: An apparatus and method are provided for virtual memory mapping and transaction management in an object-oriented database system having permanent storage for storing data in at least one database, at least one cache memory for temporarily storing data, and a processing unit which runs application programs which request data using virtual addresses. The system performs data transfers in response to memory faults resulting from requested data not being available at specified virtual addressed and performs mapping on data in cache memory. The data in the database may include pointers containing persistent addresses, which pointers are relocated between persistent addresses and virtual addresses.

Abstract: A retaining wall system (20) comprises at least one wall panel (24) and two vertical frame members (40), each frame member (40) having a web (56), two flanges (54) and an end secured within the ground. Each wall panel (24) has a face (28) with a plurality of mounting brackets (38) protruding therefrom, and is supported in mechanically retained vertical orientation between the flanges (54) of adjacent frame members (40). A plurality of connectors (46), each having a proximal end (48) secured to a respective one of said mounting brackets (38) and extending horizontally therefrom to a distal end (50) secured to a respective one of a plurality of anchors (52) is also disclosed. Optionally, a plurality of Jersey barrier panels (106) or acoustic panels are similarly mechanically retained to form a Jersey barrier or acoustic barrier, respectively. Further is disclosed a method for erecting a retaining wall according to the invention.

Abstract: A method of constructing a stabilised earth structure under water comprises lowering a row of base units on to a site under water, lowering into a position immediately above said base units facing units to which are attached in a row elongate flexible reinforcements for stabilising the earth, the facing units being guided during lowering by rigid guide members connected to the base units, and backfilling the base and facing units with earth to cover the reinforcements. Each base unit comprises an elongate box and fluid concrete is introduced into the elongate box and allowed to harden to support the respective facing unit with its lower edge horizontal even if the base unit rests on a slope. Each guide member is connected to a respective elongate box so as to be adjustable to a vertical orientation.

Abstract: A rolled metal strip for use in stabilized earth structures has at periodic intervals along its length thickened reinforcement regions formed during the rolling operation. The strip is cut into required lengths such that each strip length has an end reinforced region through which an aperture is then formed to receive a bolt passing through a bracket of a facing. The strip may include transverse ribs at intervals on both faces of the strip to assist engagement with the surrounding soil.