An ecological restoration type prefabricated concrete slab and a method for reconstructing hard bank revetment and river bed restoration

Abstract

The invention discloses an ecological remediation-type precast concrete plank and a method for reconstructing a river hard protection bank as well as restoring riverbed, wherein the precast concrete plank employs concrete to precast, the concrete comprises the following components: 400-700kg / m<3> of porous aggregate; 200-250kg / m<3> of low alkalescence cementing material, 40-60kg / m<3> of granular repairing agent, 3-7kg / m<3> of high efficiency additive and 50-90kg / m<3>. The ecological reconstruction method that the ecological remediation-type precast concrete plank is employed at bottom of original hard protection bank and riverbed has the advantages of saved resource, less investment, short construction period and fast effectiveness, and overcomes the difficulty of underwater construction of the concrete. Through the reconstruction method, a water and land ecological system chain is improved, pollutants such as an organic matter, nitrogen and phosphorus and heavy metals in water can be simultaneously absorbed, then pollutants can be removed through combined action of animals and plants as well as microbes, in-situ regeneration of an adsorbent is realized, adsorption capacity enables in-situ recovery, and long-term continuous ecological water purification effect can be reached.

Description

technical field [0001] The invention relates to the technical field of preparation of environmentally friendly concrete materials, in particular to a porous lightweight permeable concrete slab for improving hard revetments and riverbed repairs, which is suitable for the ecologicalization of original hard bank slopes such as rivers, lakes, and reservoirs. Reconstruction and ecological restoration of river bed bases. Background technique [0002] Traditional hard revetments are often used in river engineering, especially in urban inland rivers where land is scarce. The traditional hard revetment is mostly made of masonry or ordinary cement concrete. This revetment mode is effective, which can not only prevent floods but also make the river landscape look neat and clean; however, the hard revetment structure has small porosity and poor water permeability and air permeability. , destroyed the material cycle and energy flow between water, soil and living things, and made a large...

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Problems solved by technology

[0005] The technical problem to be solved by this invention is to overcome the defects of traditional hard revetments in terms of landscape and ecology as well as the deficiencies in river and lake sediment pollutant control and river bed restoration technology, and propose an ecological restoration for ecological transformation of revetments and river bottoms Type prefabricated concrete slabs and transformation methods can solve the problems of biodiversity reduction and ecosystem damage caused by traditional hard bank revetments, effectively inhibit the endogenous pollution of river and lake sediments, and quickly repair the damaged areas due to sediment dredging and sediment coverage. The riverbed micro-ecosystem creates a good natural ecological simulation environment, promotes the virtuous cycle of the ecosystem, and creates a beautiful landscape that protects the water environment

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