Dong Mingda

TL;DR: In this paper, a steel cylinder type foundation structure of an offshore wind turbine is described, which is characterized by comprising an upper steel cylinder, a steel cover plate, a lower steel cylinder and shifting boards.

Abstract: The invention discloses a cement-based high-strength micro-expansive grouting material The material comprises, by weight, 400-500 parts of cement, 100-150 parts of an active admixture, 400-500 parts of corundum, 15-40 parts of a water reducer, 005 to 05 part of a thickener, 01 to 03 part of a retarder, 01 to 10 part of a plastic expanding agent, 01 to 05 part of a defoaming agent and 100 to 130 parts of water, wherein the cement is type I or type II Portland cement with a strength grade of 525 MPa; the active admixture is a mixture of anhydrous calcium aluminum sulfate, metakaolin, silica fume and super fine fly ash in a weight ratio of 1: (1-3): (1-15): (1-3); and the particle size of corundum is 20 to 70 meshes The cement-based high-strength micro-expansive grouting material has the advantages of no water segregation, slight expansion, high strength and 28-d compressive strength of more than 120 MPa, is applicable to large-volume grouting projects with high requirements on strength, and is moderate in cost, simple to produce, convenient to construct and stable in performance

TL;DR: In this paper, the utility model relates to a multi-functional marine construction is from a peaceful platform, including hull, spud leg, hoist, armful stake ware and main generator.

TL;DR: In this article, an anti-freezing concrete using steam-curing technology is described, which is characterized in that a freezing and thawing-resistant concrete is prepared from the following components in parts by weight: 10 to 13 parts of cement, 29 to 32 parts of fine aggregate, 43 to 48 parts of coarse aggregate, 4 to 5 parts of ore slag powder, 0.5 part of silicon ash, 0 to 4 parts of fly ash, and 4.8 to 6 parts of water.

TL;DR: In this paper, a rotating type floating pile driving guide frame is described, which is characterized by comprising a positioning steel pile, a guide frame body and a pile holding device, where each of the upper and lower guide frames comprises a fixed truss, a standard section truss and a positioning truss which are connected from back to front in a sequence.