GB473874A - Improvements in or relating to defensive structures - Google Patents

Abstract

473,874. Subaqueous walls. DEUREN, P. VAN. April 19, 1937, Nos. 11129 and 11130. Convention dates, Nov. 5, 1936 and Feb. 20, 1937. [Class 68 (ii)] [Also in Group X] Defensive structures for use as retaining walls in jetties, dykes, breakwaters, dams, and the like, are formed of standardized bars of concrete, wood, or metal, assembled in triangular formations with superposed ends, to constitute an openwork structure. The unit bars 1 are formed with end apertures 2 of conical shape and the bars are assembled in triangular formation, as shown in Fig. 1, with or without the use of distancepieces 6, the superposed ends of the unitsin the front and rear rows and of the superposed diagonals having uprights 3 passed through them and driven into the ground. Cementitious material is then passed through the aligned apertures in the units to seal the joints. The structure may be widened by the use of diagonal bars of twice the length of the units 1 and apertured at their centres and ends. The spaces enclosed by the structure, may be filled, wholly or partly, with stones, blocks, sand or concrete. In a modification, the bars 1b, Fig. 8, are formed with integral distance-pieces 10 perforated with holes of polygonal cross-section and if made of concrete, they may be reinforced by metal 12. The cellular structures may be arranged as shown in Fig. 17, as an internal reinforcement for a retaining bank, some of the bars 14 in this structure being shown in inverted position with respect to the bars on which they are superposed. The cellular structures may be made of diminishing width with height, Fig. 19, and the outer cells may be filled with blocks or concrete to form an impervious face-wall 24.