Construction method of coral island reef underground fresh water collecting facility

Abstract

The invention relates to a construction method of a coral island reef underground fresh water collecting facility, which comprises the following steps of: 1, performing a technical exploration on a coral island reef to be constructed; 2, constructing an annular waterproof curtain wall; 3, constructing a permeability reducing layer by adopting a high-pressure fixed-depth grouting process, wherein the permeability reducing layer is connected with the bottom of the waterproof curtain wall; and 4, building a rainwater collection and infiltration-assisting pipe network system. By the adoption of the construction method of the coral island reef underground fresh water collecting facility, the waterproof curtain wall which is annular and closed and has a depth capable of reaching a Pleistocene karst aquifer is built on a stratum of a coral island reef land area, the rainwater collection and infiltration-assisting pipe network system for enhancing rainwater infiltration and the permeability reducing layer for reducing a permeability coefficient of a Holocene and Pleistocene unconformity surface stratum are constructed under the land surface, so that a huge underground water storage container positioned in the whole island reef stratum is constructed, the container is continuously supplemented by rainfall so as to solve the problems of small amount, extremely fragile and unstable available fresh water of the coral island reef fresh water lens body in a natural state.

Description

technical field [0001] The present invention relates to the field of freshwater storage and collection on coral reefs, in particular to a construction method for underground freshwater collection facilities on coral reefs, which expands the volume of freshwater lenses naturally formed on coral reefs to dozens of times the original volume, resulting in a large, stable, Reliable, exploitable underground freshwater reservoir. Background technique [0002] like figure 1 As shown, under the specific geological conditions of coral reefs, after long-term natural action, the seawater filling the island body is gradually driven away by rainwater, forming a freshwater lens with a thick center and thin edges. There are three necessary conditions for the formation of freshwater lenses: a certain amount of rainfall, special coral island geological structures, and the difference in bulk density between seawater and freshwater. However, in the natural state, the above three conditions are...

AI Technical Summary

Problems solved by technology

This invention can solve the problem of drinking water on the islands adjacent to coral reefs to a certain extent; the disadvantages of the technical book scheme disclosed in this patent document are: it does not solve the shortage of fresh water on coral reefs, and the impact of rainfall is large. It is a deformed water cellar and cannot be well Solve the instability of fresh water due to the influence of fresh water seepage loss and sea water diffusion

The disadvantage of the disclosed technical book scheme in this patent document is that it only solves how to rationally exploit the fresh water in the fresh water lens of the existing coral reef island, and does not solve the problem that the available fresh water of the fresh water lens of the coral reef is small, extre

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