Tangential and Normal Resistance Test Method of Anchor Chain and Soil Under Equivalent Elastic Boundary

Abstract

The invention discloses a device and method for testing the tangential and normal resistance of an anchor chain and soil under an equivalent elastic boundary. The device comprises a support frame, a transmission device, a pneumatic loading system, a test box, a vertical displacement applying part, a tangential Anchor chain unit, normal anchor chain unit, etc. By using springs of equal stiffness to simulate the elastic boundary, the invention greatly reduces the size of the test box under the influence of the boundary conditions, can effectively save materials and reduce the difficulty of experimental operation; at the same time, it sets the normal and tangential resistance tests as It can measure the tangential and normal interaction between the anchor chain and the soil at the same time, which can provide important design parameters for the calculation of the engineering anchor chain into the soil, and has important reference significance for the design of the mooring system with the anchor point below the seabed mud surface.

Description

technical field [0001] The invention relates to a test device, in particular to a device for testing the tangential and normal resistance of the anchor chain and the soil under the equivalent elastic boundary. The resistance force when the relative displacement occurs upward. Background technique [0002] In the field of marine engineering, anchor foundations and anchor chains are usually used to fix offshore floating structures (such as offshore drilling platforms, exploration platforms, etc.). At present, the most widely used is the suction anchor. This anchor foundation usually has a certain buried depth In order to improve the stress state of the anchor so as to exert a greater bearing capacity, the connection point with the anchor chain is usually located at 2 / 3 of the buried depth of the anchor foundation, so the anchor chain needs a certain depth of penetration. [0003] According to existing studies, the magnitude of the load transmitted from the upper load to the a...

AI Technical Summary

Problems solved by technology

At present, there is no relevant experimental device at home and abroad that can simultaneously measure the normal and tangential shear resistance of the anchor chain and the soil, especially in the measurement of the normal resistance, which often needs to consider the size effect of the elastic boundary, so The size of the test chamber needs to be made large enough

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