| 摘要 |
The invention concerns a device which allows rectangular ducts to be locked together to prevent them from sliding apart in a horizontal row and between rows on top of each other and also to allow reinforcements to be fixed if required. It consists of: - vertical grooves of triangular section 1 on two or four of the side faces, - triangular notches 2 on all or part of the two or four upper and/or lower edges. These notches also allow adjustment of the slope for constructing banks, - holes 3 in the side walls for the passage of horizontal reinforcements if required. These three devices can be used together or separately. The device is particularly designed for construction of walls (with the ducts filled with concrete) or banks or garden steps (with earth filling). <IMAGE> |
