The invention relates to an impact compactor (10) and to a method and system of obtaining an indication of the soil strength of soil (100) by using an impact compactor (10). The impact compactor (10) includes a chassis 5 structure (12), at least one wheel (14) supportively mounted on the chassis structure (12), and at least one impact drum (16) which is displaceable relative to the chassis structure (12). The method includes travelling with the impact compactor (10) over a soil surface (100) while the drum (16) is in a raised position in which it is spaced from the soil surface (100) and 10 measuring, by using a measuring arrangement (20) which is connected to or forms part of the impact compactor (10), a rut depth (54) of a rut in the soil surface (100) which is formed by the wheel (14) as the impact compactor (10) travels over the soil surface (100).

A foundation system for supporting a structure thereon comprising: a plurality of blocks, each block having at least three sides; at least two recesses formed in the at least three sides of each block; a plurality of connecting plates having a first end configured to be secured within a recess of a first block and a second end configured to be secured within a recess of an adjacent block such that the connecting plate extends between recesses of adjacent blocks to secure adjacent blocks together to form a foundation grid of said blocks; and enclosure panels mountable to said blocks along an edge thereof so as to form an enclosure about a perimeter of the foundation grid.

Disclosed are exemplary embodiments of submersible turf reinforcement mats that may include polymer and one or more additives. For example, calcium carbonate, zinc sulfide, barium sulfate, and/or other additives may be mixed or blended with the polymer such that the overall density is high enough to cause the submersible turf reinforcement mat to sink in water.

A passive annular grout seal assembly is disclosed for sealing an annular opening between a driven pile and a skirt pile sleeve for an offshore platform. The annular seals are located at the bottom of the pile sleeves near sea floor and automatically activated when piles are inserted and driven through the pile sleeves without any active operational procedure during offshore piling. The seal configuration fully utilizes the seal height, the grout column height and the density difference between grout and sea water to produce enhanced sealing capacity against the column of grout above.

A method for reinforcing an aggregate pier. The method includes inserting a conical-head pipe into the aggregate pier, injecting grout into the aggregate pier by injecting the grout into the inner chamber of the hollow rod, driving the conical-head pipe into a soil under the aggregate pier by driving a secondary pipe into the aggregate pier and pushing the conical-head pipe toward the soil under the aggregate pier by utilizing the secondary pipe, filling the secondary pipe with grout, and inserting a reinforcement bar into the secondary pipe and the hollow rod. This method reinforces an aggregate pier against excess tensional and compressional loads of a concrete foundation.

Embodiments described herein relate to construction of subsurface structural elements that are configured to redirect soil forces. For instance, a form may be used to construct a subsurface structural element such that the subsurface structural element redirects soil forces to vertically displace a foundation rather than have the soil forces crack or otherwise damage the foundation.

A foundation for a wind turbine tower includes a base slab, a pedestal provided on the base slab, the pedestal including attachment means for attaching the wind turbine tower; and a plurality of radial walls extending from the pedestal towards an outer edge of the base slab, wherein at least one of the base slab, the pedestal and at least one of the plurality of radial walls is made of or includes fiber reinforced concrete.

Weak soil anchor device (1) for anchoring a number of structures, as well as method for arranging an anchoring in weak soils. Seen in a vertical operating position, the weak soil anchor device (1) comprises: an elongate inner continuous open box structure (2) with a triangular cross-section comprising a first wall surface (3), second wall surface (4) and third wall surface (5), an outer continuous open box structure (10) with a smaller vertical extent than the inner box structure (2) and having a triangular cross-section consisting of a first outer wall surface (11), second outer wall surface (12) and third outer wall surface (13), the vertical center area (14) of the first, second and third outer wall surfaces is connected to the inner elongate continuous open box structure (2) in a lower area of respectively an outer edge area between the first and second wall surface (3, 4), second and third wall surface (4, 5) and the third and first wall surfaces (5, 3), and anchor brackets (20) are arranged in a lower outer area of the weak soil anchor device (1), where the weak soil anchor device comprising the inner and outer box structure (2, 10) is lowered down into the weak soils to a desired depth.

Embodiments described herein relate to construction of subsurface structural elements that are configured to redirect soil forces. For instance, a form may be used to construct a subsurface structural element such that the subsurface structural element redirects soil forces to vertically displace a foundation rather than have the soil forces crack or otherwise damage the foundation.