Grouting suction anchor and its installation method

Abstract

The invention discloses a grouting suction anchor comprising a cylinder body; the cylinder body has an integral structure comprising an upper part, an intermediate part and a lower part; the diameter of the upper cylinder body is identical to that of the lower cylinder body; the diameter of the intermediate cylinder body is less than those of the upper cylinder body and the lower cylinder body; the upper, the intermediate and the lower cylinder body share a same center line; a top part of the upper cylinder body is provided with multiple grouting inlets and scuppers; the grouting inlets are communicated with a grouting channel inside a side wall of the upper cylinder body; the grouting channel extends downwards to a lower end surface of the upper cylinder body; an outlet of a lower end of the grouting channel is positioned between the outer lateral surface of the upper cylinder body and the outer lateral surface of the intermediate cylinder body; the grouting channel and the cylinder body inner chamber are separated from each other. The invention also discloses an installation method of the suction anchor. After downward penetration of the suction anchor is completed, the intermediate cylinder body and soil body interspace are filled with cement mortar which can improve the lateral bearing capacity of the suction anchor. After the cement mortar is solidified, the friction coefficient between surrounding soil body and anchor cylinder contact surface is increased and the limit bearing capacity of the suction anchor is increased.

Description

technical field [0001] The invention relates to civil technology, in particular to a grouting suction anchor and an installation method thereof. Background technique [0002] The suction anchor is a steel cylinder with a closed top and an open bottom. It is laid flat on the seabed and the lower edge of the anchor cylinder is embedded in the soil by the weight of the anchor. The grouting pump draws water outward, and the amount of water pumped out at the same time exceeds the amount of water infiltrated from the bottom, resulting in a decrease in the internal pressure of the anchor tube. When the vertical downward pressure on the anchor cover caused by the pressure difference between the inside and outside of the anchor tube exceeds the resistance of the soil to the anchor tube, the anchor tube can be continuously pressed into the soil until the bottom of the anchor cover sinks when it contacts the sea bottom. The anchor is terminated. At this time, the grouting pump can be ...

AI Technical Summary

Problems solved by technology

However, the source of the bearing capacity of the suction anchor is still the friction resistance between the inner and outer walls of the tube wall or the anchor skirt and the soil, and the source of the pull-out bearing capacity has not been changed.

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