| 摘要 |
A flexible, molded, polymeric grid (30) is embedded in a predominantly concretemat comprising a concrete slab having relatively thicker portions (24) and relativelythinner portions (22), the thicker portions defining blocks connected by thethinner portions, along which the concrete slab (20) is breakable, and the longitudinallyand transversely extending members connecting the blocks to one another whenthe concrete slab (20) is broken along the thinner portions. The flexible gridhas two longitudinal edges, two transverse edges, longitudinally extendingmembers, and transversely extending members. The respective longitudinallyand transversely extending members meet at nodes (34), spaced uniformly fromone another, both longitudinally and transversely, except that, along the longitudinaland transverse edges, each node is spaced more distantly from the nodes nearestto the node. When the longitudinal and transverse members are disposed withoutstress in an imaginary plane fingers (38), which are unitary with the grid, extendfrom the plane. |
