Tangential and normal resistance testing device for anchor chain and soil under equivalent elastic boundary

Abstract

The invention discloses a tangential and normal resistance testing device and method for anchor chain and soil under an equivalent elastic boundary. The device comprises a supporting rack, a transmission device, an air pressure loading system, a test box, a vertical displacement applying part, a tangential anchor chain unit, a normal anchor chain unit and the like. By employing an equal rigidity spring to simulate the elastic boundary, the size of the test box can be reduced greatly in the condition that the boundary condition is affected, so that the materials can be saved effectively and theexperimental operating difficulty can be reduced effectively. Meanwhile, the device can integrate tangential and normal resistance tests, can measure the tangential and normal interactions of the anchor chain and the soil, and can provide important design parameters for calculating a buried fragment of an engineering anchor chain. The device and method have important reference meaning in a mooring system of an anchor point below the sea bottom mud face.

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

Images