Coral sand solidification method

Abstract

The invention provides a coral sand solidification method. The method comprises the steps that firstly, a high-pressure whirl-spray grouting device is drilled to a preset depth range; secondly, a mortar pump valve is started, slurry is conveyed to a drill pipe by extrusion of a mortar pump, extrusion grouting is conducted on coral sand through a drill bit and a grouting hole, and in the preset depth range, the drill bit rotates while grouting is conducted; thirdly, whirl-spray agitating is completed, the drill pipe is lifted out, and coral sand concrete can be obtained after solidification. The coral sand concrete obtained by solidification of the coral sand is good in compaction degree and high in shock resistance and greatly enhances the crack resistance and permeability resistance of the coral sand base course, the coral sand concrete with a certain strength is formed, and therefore the loss of the coral sand is reduced.

Description

technical field [0001] The invention belongs to the technical field of coral sand solidification, in particular to a coral sand solidification method in foundation engineering. Background technique [0002] my country's coral reefs are mainly distributed in the tropical coast and ocean south of the Tropic of Cancer. Most of the islands and reefs scattered in the South China Sea are composed of coral reefs, and the thickness of the reefs is more than 2000m. According to the core formation of Well Nanyong 1 in the Nansha Islands According to the analysis, the coral reef has undergone diagenetic changes below 17.3m, forming reef limestone; above 17.3m is the accumulation of loose unconsolidated or weakly cemented coral reef debris. Coral sand is a special type of rock-soil medium developed in tropical marine environments , mainly composed of coral debris and other marine biological debris, with high calcium carbonate content, special material composition, structure and developmen...

AI Technical Summary

Problems solved by technology

However, with the increasing impact of global warming and human activities, coral reefs are suffering an unprecedented crisis. Once the loss of coral sand exceeds its growth rate, it will be unable to make ends meet. The sand island is in a state of erosion, which seriously affects the safety of the sand island. Coral sand islands are facing difficulties, and it is urgent to strengthen their protection

[0003] At present, there are many protections for coral sand damage, but most of them start from the ecological point of view. The research from the direction of protecting corals has found out the key species to restore coral ecology, and proposed to transplant reef-building corals to increase coral space to make up for the restoration of coral reef ecology. The time required for the system, due to the lack of in-depth research on the movement characteristics of coral sand, and the phenomenon of sediment loss on coral sand islands, from the perspective of sediment movement, there are few examples of prevention and control of coral sand islands. Coral sand and terrestrial quartz Compared with sand, there is a big difference in physical properties. From the appearance, coral sand has poor roundness, high edge angle, large porosity and other characteristics, which will make coral sand easier to clean under hydrodynamic action. Starting, the activity of coral sand will cause the loss of coral sand, which will lead to the erosion of the coastline of coral sand island

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