Embodiments generally relate to modular access covers. Example embodiments relate to an access cover assembly comprising: a first set of modular access covers and a second set of modular access covers, wherein in each set, adjacent covers are coupled; and a support frame comprising end frame pieces, side frame pieces, wall boxes, and a support beam. The end frame pieces and side frame pieces define a support plane to support the first and second sets of modular access covers. The wall boxes define a support surface to support the support beam and the end frame pieces, and the support surface is offset from the support plane and the wall boxes are connected to the end frame pieces and receive respective ends of the support beam.

The present invention relates to an intelligent bionic scouring protection structure for a cylindrical foundation and an application method thereof, wherein the protection structure is formed by connecting bionic units; an uppermost layer of the bionic unit is a bionic grass bundle, a bottom end of the bionic grass bundle is sleeved inside a bundle tube, the bundle tube is fixedly connected with a fiber mesh layer through a binding wire, connecting rings are fixed at both ends of the fiber mesh layer through the binding wire, two adjacent fiber mesh layers are connected through the connecting ring; and a bottom portion of the bionic unit is provided with a seabed connecting structure for fixing the whole protection structure. The above protection structure with an upper layer, a middle layer and a lower layer is adopted to replace traditional hard scouring protection such as ripraps and sand bags.