Presented herein are systems, methods, and apparatus related to relocatable tower technologies that facilitate on-site deployment and provide improved stiffness in order to minimize motion at a tower top in a manner that existing approaches, which focus on survivability, do not contemplate. In particular, relocatable tower technologies described herein can be deployed rapidly and at low cost, at outdoor sites, to, e.g., provide a vertical mast upon which equipment can be mounted. In certain embodiments, features of relocatable towers described herein allow the vertical mast to survive and remain rigid while being exposed to outdoor elements, such as wind gusts (e.g., up to 110 Mph). Advantages of relocatable tower technologies described herein are particularly well suited where (e.g., scanning based) imaging and/or detection equipment is mounted at a top of the tower, and/or where towers are deployed at sensitive sites such as hydrocarbon production, storage and processing facilities.

The present disclosure relates to systems and methods for providing self-standing, self-supporting, rapid-deployable (S4RD) towers for communications and similar applications, and in particular to ballast base systems that enable the self-standing, self-supporting, rapid-deployable features while eliminating the need for a permanent foundation for the tower. Novel and inventive tower designs, wherein a user may climb through an interior volume of the tower while using the tower structure as both ladder and man cage, are also disclosed.

The present disclosure relates to systems and methods for providing self-standing, self-supporting, rapid-deployable (S4RD) towers for communications and similar applications, and in particular to ballast base systems that enable the self-standing, self-supporting, rapid-deployable features while eliminating the need for a permanent foundation for the tower. Novel and inventive tower designs, wherein a user may climb through an interior volume of the tower while using the tower structure as both ladder and man cage, are also disclosed.

An offshore structure (1) with tubular braces (110) that are joined by joints (125) at nodes (120). The tubular braces (110) may be made of steel. The joint (125) is formed by means of casted concrete or grout in a receiving joint volume (150) in one or both of the braces (110). Also disclosed is a a keel structure formed by braces (110) and joints (125) as outlined and a combination of a wind turbine and such offshore structure (1).

A system (10) for modifying atmospheric conditions is disclosed. The system (10) comprises a tower (20), at least one first rod (42) and at least one second rod (62), each of the at least one first rod (42) and the at least one second rod (62) coupled to the tower (20) to extend from the tower (20) and define an end distal (46, 66) from the tower (20), wherein the at least one second rod (62) is spaced apart from the at least one first rod (42) along a height (H.sub.T) of the tower (20). The system (10) further includes a first set of emission wires (70) extending between the end (46) of the at least one first rod (42) and the end (66) of the at least one second rod (62).

A system (10) for modifying atmospheric conditions is disclosed. The system (10) comprises a tower (20), at least one first rod (42) and at least one second rod (62), each of the at least one first rod (42) and the at least one second rod (62) coupled to the tower (20) to extend from the tower (20) and define an end distal (46, 66) from the tower (20), wherein the at least one second rod (62) is spaced apart from the at least one first rod (42) along a height (H.sub.T) of the tower (20). The system (10) further includes a first set of emission wires (70) extending between the end (46) of the at least one first rod (42) and the end (66) of the at least one second rod (62).

The present invention belong to the technical field of lattice tower structure monitoring, and discloses a displacement reconstruction method for a lattice tower structure based on improved mode superposition. The method comprises: uniformly arranging D strain sensors on main member of a lattice tower along the height, processing collected strain data {ε}.sub.D×1 using a stochastic subspace identification (SSI) method to obtain a matrix [Ψ].sub.D×n.sup.T of first n-order strain modes;

calculating a function relation y(x) between a distance from a measuring point to a neutral layer and a height according to a lattice tower design drawing; performing polynomial fitting on the first n-order strain modes with a height coordinate x of the lattice tower respectively to obtain a strain mode function Ψ.sub.i(x), expanding a function

[00001]$\frac{{\Psi }_i\left(x\right)}{y\left(x\right)}$

according to a Taylor formula, performing double integration on the expansion result and substituting same into a boundary condition, to obtain a displacement mode function Φ.sub.i(x); evaluating a modal coordinate {q}.sub.n×1 by means of the least square method, substituting the height coordinate x of a displacement object point to be reconstructed, and multiplying the displacement mode function value Φ.sub.i(x) by the modal coordinate {q}.sub.n×1. The improved mode superposition method of the present invention has the advantages of a small number of sensors required, simple calculation process, accurate calculation result, and strong operability and practicality.

A foundation for a tower includes a plurality of ballast holders spaced from each other and a central portion configured to support a tower. The foundation includes a plurality of connecting members, each connecting member configured to attach a ballast holder to the central portion, wherein a length of the plurality of connecting members is determined based upon the load capacity required to retain the tower in a vertical position, wherein when the plurality of ballast holders is connected to the central portion, the central portion is elevated above the plurality of ballast holders, wherein different lengths of the connecting members expands and contracts the footprint of the foundation to match the foundation to the required maximum loading requirements.

A transportable lifting device (10) comprising: an upright (12); an arm (13) connectable to the upper end of said upright (12); a diagonal (14) for connecting said arm (13) and said upright (12); characterized in that said arm (13) is fixed to said upright (12) by means of a first joint (30, 35); said diagonal (14) is fixed to said upright (12) by means of a second joint (32, 41); said diagonal (14) is fixed to said arm (13) by means of a third joint (36, 40); said first joint (30, 35), said second joint (32, 41) and said third joint (36, 40) are of the type with double tenon and mortise; said first joint (30, 35) comprises: two hooks (35) placed at the end of the arm (13); two vertical slots (30) placed on the upright (12).

A transportable lifting device (10) comprising: an upright (12); an arm (13) connectable to the upper end of said upright (12); a diagonal (14) for connecting said arm (13) and said upright (12); characterized in that said arm (13) is fixed to said upright (12) by means of a first joint (30, 35); said diagonal (14) is fixed to said upright (12) by means of a second joint (32, 41); said diagonal (14) is fixed to said arm (13) by means of a third joint (36, 40); said first joint (30, 35), said second joint (32, 41) and said third joint (36, 40) are of the type with double tenon and mortise; said first joint (30, 35) comprises: two hooks (35) placed at the end of the arm (13); two vertical slots (30) placed on the upright (12).