| 摘要 |
The invention concerns the assembling of prefabricated concrete units. The unit comprises a bottomless casing with two side walls 7 and 8, a front wall 5, a rear wall 6 and a central wall 9. The rigidity of the assembly is obtained by positioning, when fixing, cement stops 11 to be plugged into the holes 1 or 2 in the casing according to the desired angle, 1st position 15 DEG , 2nd position 25 DEG . For walls built in a curve, the casing is hinged around these stops 11 in the form of an ellipse, the stops rotating up to 180 DEG . The casing may also be cut level with the central wall 9 to give a half casing to lay on upper courses of the wall. The device of stops and casings is particularly intended for the construction of a flexible retaining wall. <IMAGE>
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