Marine artificial island construction method and marine artificial island building structure

Abstract

The invention relates to the technical field of artificial island construction, and discloses a marine artificial island construction method and a marine artificial island building structure.The construction method comprises the steps that construction waste is subjected to classification pretreatment, and the construction waste subjected to classification pretreatment is conveyed to a marine artificial island engineering sea area; performing engineering construction on the peripheral island wall of the artificial island by utilizing the construction waste subjected to classification pretreatment, performing engineering construction on a dense solid body in the artificial island by utilizing the construction waste subjected to classification pretreatment, performing engineering construction on the revetment on the outer side of the artificial island by utilizing the construction waste subjected to classification pretreatment, and paving prefabricated wave-resistant regenerated products; according to the method, the construction waste is firstly classified and pretreated, and then the classified construction waste is used for constructing all the components of the offshore artificial island according to the physical and mechanical properties of the construction waste, so that all the components in the construction waste are fully utilized, and the utilization rate of the construction waste is increased; and meanwhile, the classified construction wastes with different mechanical properties correspondingly construct artificial island components with different strengths, so that the construction strength of the artificial island is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial island construction, and in particular to a method for constructing an offshore artificial island and an offshore artificial island building structure. Background Art

[0002] Construction waste refers to the slag, abandoned soil, abandoned materials, silt and other waste generated during the construction, laying, demolition and repair of various buildings, structures, pipelines, etc. The main way to deal with construction waste is to adopt extensive methods such as open-air stacking or ocean dumping, which not only occupies land, pollutes and even destroys the ecological environment, but also may affect the drainage of urban rivers and induce safety accidents such as collapse of garbage piles or piles, landslides, etc.

[0003] An artificial island is an island that is artificially built rather than naturally formed. It is usually built on small islands and reefs and is a type of land reclamation.

[0004] In the prior art, in order to apply construction waste to the construction of artificial islands, the recycled construction waste is usually directly made into large cement bricks through cement bonding to construct the artificial islands. This method of building artificial islands fails to make full use of construction waste, resulting in a low utilization rate of construction waste in the construction of artificial islands. Summary of the invention

[0005] In view of this, the present invention provides a method for constructing an offshore artificial island and an offshore artificial island building structure to solve the problem of low utilization rate of construction waste in the prior art when constructing an artificial island.

[0006] In a first aspect, the present invention provides a method for constructing an offshore artificial island, comprising:

[0007] Classify and pre-treat construction waste;

[0008] Transport the classified and pre-treated construction waste to the offshore artificial island project area;

[0009] Use classified and pre-treated construction waste to construct the outer wall of the artificial island;

[0010] Use classified and pre-treated construction waste to construct dense physical projects on the artificial island;

[0011] The classified and pre-treated construction waste is used to construct the outer bank protection project of the artificial island and lay prefabricated wave-breaking recycled products.

[0012] Beneficial effects: The present invention classifies and pre-processes construction waste first, and then constructs various components of the offshore artificial island according to their respective physical and mechanical properties, so that each component in the construction waste can be fully utilized, thereby improving the utilization rate of the construction waste. At the same time, the classified construction waste with different mechanical properties corresponds to the artificial island components with different strengths, thereby improving the construction strength of the artificial island.

[0013] In an optional embodiment, the step of classifying and pre-processing construction waste includes:

[0014] Conduct non-toxic and harmless testing on construction waste;

[0015] Sort construction waste into discarded bricks and concrete, discarded bricks and stones, construction debris, construction mud and other waste.

[0016] Beneficial effects: When the present invention classifies and pre-treats construction waste, harmful components in the construction waste can be screened out by conducting non-toxic and harmless detection on the construction waste, thereby avoiding the use of harmful components in the construction of artificial islands; waste brick concrete, waste bricks and stones, engineering slag, engineering mud and other waste classified as having typical physical structural mechanics or material mechanics characteristics can be used to construct building structures with different mechanical properties in artificial islands.

[0017] In an optional embodiment, the steps of using classified pre-treated construction waste to construct the outer bank protection project of the artificial island and lay prefabricated wave-breaking regeneration products include:

[0018] The sorted waste brick concrete and waste masonry are used to make prefabricated wave-breaking recycled products.

[0019] Beneficial effects: The present invention breaks or granulates inert large and medium-sized block construction waste such as discarded brick concrete, discarded bricks and stones, and then adds appropriate amounts of steel bars and sand and gravel as needed, and combines and processes them to form recycled products such as prefabricated wave-breaking concrete bolts, prefabricated wave-breaking concrete fences, prefabricated wave-breaking concrete columns, etc. that meet the structural standards of coastal defense or bank protection projects, thereby improving the utilization rate of construction waste.

[0020] In an optional embodiment, the step of classifying and pre-processing the construction waste further includes:

[0021] The construction waste soil is further screened into sand, silt, clay and soft soil.

[0022] Beneficial effects: The present invention further screens the engineering slag into sand, silt, clay and soft soil according to the soil mechanics properties, which is convenient for use in constructing different building structures in the construction of artificial islands.

[0023] In an optional embodiment, the step of classifying and pre-processing the construction waste further includes:

[0024] The engineering mud is dried.

[0025] Beneficial effects: The present invention dries the engineering mud, making it easier to transport the dried engineering mud.

[0026] In an optional embodiment, the steps of using classified pre-treated construction waste to construct the outer wall of the artificial island include:

[0027] Determine the spatial layout and engineering design of the offshore artificial islands based on the engineering hydrological and geological characteristics of the proposed project area;

[0028] Construction of outer steel cylinder and sub-grid;

[0029] The sorted construction waste is backfilled into the outer steel cylinder and sub-grid.

[0030] Beneficial effects: The present invention adopts the method of backfilling the classified construction waste into the outer steel cylinder and the auxiliary grid, which can increase the density and stability of each space.

[0031] In an optional implementation, the steps of using classified pre-processed construction waste to construct dense solid engineering in the artificial island include:

[0032] The sorted construction waste will be backfilled in layers in the artificial island area at sea.

[0033] Beneficial effects: The present invention uses classified construction waste to backfill the areas within the artificial island in the sea in different zones and layers, which can solve the problems of the source of the large amount of earthwork required in the construction of the artificial island at sea and the ecological damage caused to the ecological environment of the project area or the surrounding sea areas by the traditional offshore sand blowing island construction method. At the same time, it can also reduce the energy consumption of the traditional island construction method to promote the realization of a carbon reduction development model.

[0034] In an optional embodiment, the steps of using classified pre-treated construction waste to construct the outer bank protection project of the artificial island and lay prefabricated wave-breaking regeneration products include:

[0035] An artificial island slope protection structure is constructed around the outer side of the artificial island wall;

[0036] The wave-breaking and bank protection structures are assembled on site using prefabricated wave-breaking recycled products on the island slope protection structure.

[0037] Beneficial effect: The invention constructs an artificial island slope protection structure outside the wall surrounding the artificial island, thereby improving the ability of the artificial island to resist erosion by sea tides and waves.

[0038] In a second aspect, the present invention further provides an offshore artificial island building structure, which is constructed using the above-mentioned offshore artificial island construction method, and the offshore artificial island building structure includes:

[0039] Outer island wall;

[0040] The dense entity within the island is located inside the outer island wall;

[0041] The outer revetment of the island is located outside the outer island wall.

[0042] In an optional embodiment, the outer island wall comprises:

[0043] Peripheral steel cylinders, which are vertically arranged in the sea, and a number of peripheral steel cylinders enclose the closed perimeter of the artificial island;

[0044] Sub-grids, which connect adjacent outer steel cylinders.

[0045] In an optional implementation, the island secret entity includes:

[0046] Soft body row, which is arranged on the inner side and the outer bottom of the outer island wall;

[0047] The first backfill layer is arranged on the inner side of the outer island wall and located on the upper part of the soft body row;

[0048] The second backfill layer is arranged on the inner side of the outer island wall and located on the upper part of the first backfill layer.

[0049] In an optional embodiment, the outer bank protection of the island includes:

[0050] Filling pieces, a plurality of filling pieces are stacked and arranged outside the outer island wall;

[0051] Prefabricated wave-breaking regeneration products, the prefabricated wave-breaking regeneration products are arranged on the filling parts.

[0052] The offshore artificial island building structure of the present invention is constructed by adopting the offshore artificial island construction method, and therefore has the same beneficial effects as the offshore artificial island construction method, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0054] Figure 1 A schematic diagram of a flow chart of a method for constructing an artificial island at sea according to an embodiment of the present invention;

[0055] Figure 2 A detailed flow chart of a method for constructing an offshore artificial island according to an embodiment of the present invention;

[0056] Figure 3It is a top view of the outer island wall of the offshore artificial island building structure;

[0057] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0058] Figure 5 It is a cross-sectional view of the dense solid inside the island in the building structure of the offshore artificial island;

[0059] Figure 6 This is a cross-sectional view of the outer bank protection of an artificial island in the offshore structure;

[0060] Figure 7 This is a BB cross-sectional view of the building structure of an artificial island at sea.

[0061] Description of reference numerals:

[0062] 1. Outer steel cylinder; 2. Auxiliary grid; 3. Soft row; 4. First backfill layer; 5. Second backfill layer; 6. Filling parts; 7. Prefabricated wave-breaking regeneration products. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0064] Combine the following Figures 1 to 7 , describing an embodiment of the present invention.

[0065] According to an embodiment of the present invention, on the one hand, Figure 1 and Figure 2 As shown, a method for constructing an offshore artificial island is provided, comprising:

[0066] Classify and pre-treat construction waste;

[0067] Transport the classified and pre-treated construction waste to the offshore artificial island project area;

[0068] Use classified and pre-treated construction waste to construct the outer wall of the artificial island;

[0069] Use classified and pre-treated construction waste to construct dense physical projects on the artificial island;

[0070] The classified and pre-treated construction waste is used to construct the outer bank protection project of the artificial island and lay prefabricated wave-breaking recycled products7.

[0071] Specifically, the present embodiment does not specifically limit the construction waste. For example, the construction waste in the present embodiment is the construction waste of coastal cities. The population and industry of such cities are generally highly concentrated, and the intensity of solid waste (including construction waste) generation is often very large. The ecological environment capacity of the city or region is often very limited, resulting in a very fragile solid waste disposal capacity including construction waste. For example, due to the expansion of urban development, the local disposal space of coastal cities is shrinking, low-lying land and waste ditches are constantly being filled and reduced, and the resource utilization and disposal capacity is far less than the actual production.

[0072] The core work of the construction of artificial islands at sea is as follows: using the construction waste that has been screened, sorted, pre-treated and disposed of to form the backfill aggregates or fillers of the three major structural engineering bodies, namely the island wall of the artificial island at sea, the dense entity inside the island, and the slope and bank protection outside the island wall, according to their respective physical and mechanical properties; successively adopting engineering blowing filling, bagged sand filling, conveyor belt backfill or on-site assembly of revetments of construction waste recycled products, namely prefabricated wave-breaking recycled products 7, to implement orderly artificial island construction for the three major structural bodies of the artificial island, and finally promote the formation of the artificial island area into an offshore solid island that can be further developed and utilized.

[0073] The present invention classifies and pre-processes construction waste first, and then constructs various components of the offshore artificial island with the classified construction waste according to their respective physical and mechanical properties, so that each component in the construction waste can be fully utilized, thereby improving the utilization rate of the construction waste. At the same time, the classified construction waste with different mechanical properties corresponds to the artificial island components with different strengths, thereby improving the construction strength of the artificial island.

[0074] In one embodiment, the steps of classifying and pre-processing construction waste include:

[0075] Conduct non-toxic and harmless testing on construction waste;

[0076] Sort construction waste into discarded bricks and concrete, discarded bricks and stones, construction debris, construction mud and other waste.

[0077] Specifically, in this embodiment, the environmentally friendly and non-toxic characteristics of the construction waste are monitored and the soil is classified, sorted, screened and pre-treated for easy transportation and backfilling in different areas and layers on the island.

[0078] In this embodiment, screening and sorting pretreatment and disposal is to implement pre-screening and sorting of the initial mixed urban construction waste in strict accordance with the "three-transformation" treatment and disposal requirements of solid waste (construction waste), forming five major categories of waste brick concrete, waste bricks and stones, engineering slag, engineering mud and other garbage, each of which has typical physical structural mechanics or material mechanics characteristics.

[0079] In this embodiment, the “three transformations” are reduction, harmlessness and resource utilization.

[0080] When the present invention classifies and pre-treats construction waste, harmful components in the construction waste can be screened out by performing non-toxic and harmless detection on the construction waste, thereby avoiding the use of harmful components in the construction of artificial islands; waste brick concrete, waste bricks and stones, engineering slag, engineering mud and other waste classified as having typical physical structural mechanics or material mechanics characteristics can be used to construct building structures with different mechanical properties in the artificial island.

[0081] In one embodiment, the steps of using classified pre-treated construction waste to construct the outer bank protection project of the artificial island and lay prefabricated wave-breaking regeneration products include:

[0082] The sorted waste brick concrete and waste masonry are used to make prefabricated wave-breaking recycled products 7.

[0083] Specifically, in this embodiment, waste brick concrete and waste bricks and stones are screened out from renovation waste, house demolition waste and waste concrete in construction waste, and necessary crushing, granulation or fragmentation is carried out on them as needed, and ordinary steel bars or sand and gravel are added to them in accordance with relevant engineering specifications for prefabricated structures of marine engineering. Then, they are combined with ordinary steel bars and sand and gravel to be processed into prefabricated wave-breaking concrete bolts, prefabricated wave-breaking concrete fences, prefabricated wave-breaking concrete columns and other recycled products for use in the construction of moisture-proof and wave-breaking slope or bank protection engineering structures on the outer side of the artificial island.

[0084] The present invention crushes or granulates inert large and medium-sized block construction waste such as discarded brick concrete, discarded bricks and stones, and then adds appropriate amounts of steel bars and sand and gravel as needed to form prefabricated wave-breaking concrete bolts, prefabricated wave-breaking concrete fences, prefabricated wave-breaking concrete columns and other recycled products that meet the structural standards of coastal defense or bank protection projects, thereby improving the utilization rate of construction waste.

[0085] In one embodiment, the step of classifying and pre-processing construction waste further includes:

[0086] The construction waste soil is further screened into sand, silt, clay and soft soil.

[0087] Specifically, in this embodiment, the construction waste soil is further screened according to its physical and chemical properties, and sand, silt, clay, and soft soil with relatively obvious soil properties are sorted out and stored in different areas. Then, the sand and silt are transported to the construction area for standby use via special transportation tools, while the clay and soft soil can be transported to the construction area for standby use together with the mud after the construction mud is dried.

[0088] In this embodiment, the construction waste is further subdivided or sorted into sand, silt, clay and soft soil according to its soil mechanics properties. Among them, sand and silt have high shear strength, large compression modulus and high foundation bearing capacity, and can be used for underwater filling; clay has high shear strength, high plasticity index, high foundation bearing capacity, and medium compression modulus of soil, and is used together with sand and silt for zoned and layered backfill on the island; soft soil has high organic matter content, high compressibility, poor permeability and poor foundation bearing capacity, but can be used for backfilling of surface cultivated soil and open spaces on the island.

[0089] The invention further screens the engineering slag into sand, silt, clay and soft soil according to the soil mechanics properties, which is convenient for constructing different building structures in the construction of artificial islands.

[0090] In one embodiment, the step of classifying and pre-processing construction waste further includes:

[0091] The engineering mud is dried.

[0092] Specifically, in this embodiment, the engineering mud is dried at the source to form clay and soft soil, which are dried to meet the consolidation index and are easy to transport. The other construction waste after sorting is basically general urban solid waste or garbage (such as waste wood, waste plastic, waste metal materials, etc.), which can be treated and disposed of in a "three-transformation" manner according to the normal solid waste treatment and disposal method and then sent to a permanent disposal point or recycling point.

[0093] The invention performs drying treatment on the engineering mud, so as to facilitate the transportation of the dried engineering mud.

[0094] In one embodiment, the steps of using classified and pre-treated construction waste to construct the outer wall of the artificial island include:

[0095] Determine the spatial layout and engineering design of the offshore artificial islands based on the engineering hydrological and geological characteristics of the proposed project area;

[0096] Construct the outer steel cylinder 1 and the auxiliary grid 2;

[0097] The classified construction waste is backfilled into the outer steel cylinder 1 and the auxiliary grid 2.

[0098] Specifically, in this embodiment, the artificial island outer steel cylinder 1 and its auxiliary grid 2 are constructed based on the spatial layout of the offshore artificial island and the engineering design plan determined in advance according to the hydrological and geological characteristics of the proposed project sea area to form the preliminary structure of the artificial island wall.

[0099] In this embodiment, Figure 3 and Figure 4As shown, the outer wall structure of the offshore artificial island includes an outer steel cylinder 1 and a sub-grid 2, and the respective spaces of the two are filled with sand and silt that have been pre-treated by screening and sorting to increase the density and stability of the respective spaces, and finally form a stable water-stop island wall cofferdam around the offshore artificial island.

[0100] In this embodiment, during construction, the outer steel cylinders 1 that are pre-designed, customized and transported to the engineering sea area are vibrated one by one into the seabed impermeable layer according to the outer closed layout line of the offshore artificial island design plan using a matching vibratory hammer, and then the auxiliary grids 2 are vibrated one by one into the inner and outer gaps between the outer steel cylinders 1 using a matching vibratory hammer, so that the auxiliary grids 2 and the outer steel cylinders 1 form the initial structure of the offshore artificial island wall. In the later stage, on this basis, sand and silt are blown through pipes in the gaps between the outer steel cylinders 1 and the auxiliary grids 2 until they meet the relevant structural safety and quality requirements of the artificial island wall.

[0101] More specifically, the construction method of the water-stop island wall of the outer steel cylinder 1 of the artificial island in this embodiment is as follows: the outer steel cylinder 1 is vibrated and sunk one by one into the impermeable clay layer of the closed edge line of the outer periphery of the designed artificial island in the engineering sea area by a vibrating hammer of a marine engineering vessel until the island wall ring line is closed, and arc-shaped steel plates are successively inserted into the inner and outer sides of each outer steel cylinder 1 and connected with the outer steel cylinder 1 through a wide mortise and tenon to form a water-stop auxiliary grid 2 warehouse to construct the main structure of the island wall, i.e., the preliminary structure, and then sand and silt pipes are promptly blown backfilled in the outer steel cylinder 1 and the auxiliary grid 2 warehouse to increase the weight of the main structure of the hollow island wall and ensure its stability in seawater, until the island wall is closed to form the outer steel cylinder 1 island wall of the artificial island with a water-stop function.

[0102] In this embodiment, there is no specific limitation on the outer closed edge of the artificial island. For example, the outer closed edge of the artificial island can be a square or rectangle, a circle or an ellipse, other polygonal or irregular shape.

[0103] In this embodiment, the backfill sand in the artificial island mainly includes the backfill sand in the outer steel cylinder 1 and its sub-grid 2 of the island wall and the inner island surrounded by the island wall. In the process of enclosing the initial structure of the island wall, the mud pumping sand process, i.e., pipeline sand blowing, is used to blow sand and silt into the outer steel cylinder 1 and its sub-grid 2 to form a stable outer steel cylinder 1 cofferdam with water-stopping function; at the same time, the high permeability of sand and silt is fully utilized, and sand is continuously blown into the underwater backfill area of ​​the inner island of the island wall cofferdam to gradually "squeeze" the seawater away to form dry construction working conditions.

[0104] The present invention adopts the method of backfilling the classified construction waste into the outer steel cylinder 1 and the auxiliary grid 2, so as to increase the density and stability of the respective spaces.

[0105] In one embodiment, the steps of using classified pre-processed construction waste to construct dense solid engineering in the artificial island include:

[0106] The sorted construction waste will be backfilled in layers in the artificial island area at sea.

[0107] Specifically, in this embodiment, the construction of the dense solid project in the artificial island is to carry out the zoned and layered backfilling of the construction waste pre-treatment and disposal products inside the area enclosed by the outer island wall of the artificial island, including adopting methods and approaches such as blowing sand and silt through pipes, and conveying clay and soft soil through mud barges to implement underwater filling in the artificial island and zoned and layered backfilling on the water in the artificial island until a dense solid is formed in the offshore artificial island.

[0108] In this embodiment, the underwater area of ​​the offshore artificial island is backfilled with silt and sand screened from engineering waste soil for the entire engineering area of ​​the offshore artificial island, and after dry land construction conditions are formed inside the island, the finely screened engineering waste soil is continued to be used for backfilling in sections and layers.

[0109] In this embodiment, the dense body filling in the artificial island is carried out by filling the water space in the island formed by the construction of the outer island wall of the artificial island with underwater and above-water space in succession, including blowing sand and silt transported to the engineering sea area into the engineering artificial island through pipelines, and conveying clay and soft soil transported to the engineering sea area, mud after the engineering mud is dried, etc. to the engineering artificial island by conveyor belts, and implementing drainage measures for the reclamation project during the filling process to accelerate the densification process in the island, until a dense body of the artificial island that meets the requirements of the underground structure of the offshore artificial island or the reclamation project is formed.

[0110] In this embodiment, after the island walls are connected to form dry construction conditions, sand blowing and backfilling are carried out in different areas and layers on the water until the designed elevation of the island is met. Then, the density and stability of the filler are enhanced through natural settlement, and the settlement, displacement, etc. are monitored and controlled at any time. Finally, a dense entity of an artificial island at sea is formed so that the base bed can evenly bear the pressure of the upper load.

[0111] The present invention uses classified construction waste to backfill the areas within the offshore artificial island in different zones and layers, which can solve the problems of the source of the large amount of earthwork required in the construction of the offshore artificial island and the ecological damage caused to the ecological environment of the project area or the surrounding sea areas by the traditional offshore sand blowing island construction method. At the same time, it can also reduce the energy consumption of the traditional island construction method to promote the realization of a carbon reduction development model.

[0112] In one embodiment, the steps of using classified pre-treated construction waste to construct the outer bank protection project of the artificial island and lay prefabricated wave-breaking regeneration products include:

[0113] An artificial island slope protection structure is constructed around the outer side of the artificial island wall;

[0114] The prefabricated wave-breaking regeneration product 7 is assembled on site to form a wave-breaking and bank protection structure on the island slope protection structure.

[0115] Specifically, in this embodiment, the sand and silt that have been pre-processed and transported to the engineering sea area are filled into bagged sand through pipe sand blowing, and the outer side of the artificial island wall is piled up according to the structural requirements of the relevant marine engineering slope protection project to form the outer side slope protection structure of the artificial island wall. Then, the prefabricated wave-breaking regenerated product 7 that has been transported to the engineering sea area by ship is assembled on-site on the slope protection structure around the island to form a marine engineering wave-breaking and bank protection structure, that is, the outer side bank protection project of the artificial island, so as to form an offshore artificial island anti-collapse and anti-scouring reinforcement project.

[0116] In this embodiment, taking into account the stability of the offshore artificial island structure, the impact of the surrounding sea area, engineering costs, construction period and maintenance, sand filling equipment is usually used to fill sand and gravel into woven bags to form bagged sand, which is piled on the outer side of the outer steel cylinder 1 island wall to form a sand-filled pipe bag embankment, and assisted by outer riprap to protect the bottom, and bagged gravel and other foundations are arranged on the upper part to form an artificial island slope protection structure.

[0117] In this embodiment, the wave-breaking recycled product 7 includes inert large and medium-sized block construction waste such as discarded brick concrete, discarded bricks and stones, which are fragmented or granulated, and then an appropriate amount of steel bars and sand and gravel are added as needed to form prefabricated wave-breaking concrete bolts, prefabricated wave-breaking concrete fences, prefabricated wave-breaking concrete columns and other recycled products that meet the structural standards of coastal defense or bank protection projects.

[0118] More specifically, in this embodiment, the waste brick concrete is crushed into broken bricks and stones by certain special machinery, and then, according to the abundance of materials and the strength and quality requirements of the construction of marine engineering wave-breaking concrete bolts, wave-breaking concrete fences, and wave-breaking concrete columns, it is assisted by ordinary steel bars and sand and gravel, and processed by certain special molds or grinding parts to form prefabricated wave-breaking recycled products 7 for transportation and standby.

[0119] In this embodiment, the outer wall project of the artificial island, the dense solid project inside the artificial island and the outer bank protection project of the artificial island are implemented in an integrated completion operation and acceptance in accordance with the design target requirements of the artificial island, so as to realize the formation of the artificial island area, that is, the physical project of the offshore artificial island constituted to fully meet the land demand and development needs of the coastal city's economic and social development, such as the construction of a comprehensive energy island.

[0120] In this embodiment, after completing the outer wall engineering of the artificial island, the dense solid engineering inside the artificial island and the outer bank reinforcement engineering of the artificial island, integrated leveling is carried out according to the needs of the later development and construction of the artificial island or the functional layout of planning and design to complete the formation of the integrated land area of ​​the offshore artificial island, thereby delivering offshore artificial island physical projects such as offshore comprehensive energy islands, free trade zones, free trade islands or other new development zones for economic and social development, development islands, etc. in coastal cities.

[0121] The invention constructs an artificial island slope protection structure outside the wall surrounding the artificial island to improve the ability of the artificial island to resist erosion by sea tides and waves. While providing a space for the disposal of construction waste, it also expands the market for recycled products in the construction waste resource disposal site, which can promote the further development of the green resource utilization of urban construction waste.

[0122] In an optional embodiment, the step of transporting the classified and pre-treated construction waste to the offshore artificial island project sea area specifically includes:

[0123] In this embodiment, the construction waste is subdivided or reassembled for processing and the pre-treatment disposal products are transported to the construction sea area for standby in an environmentally friendly manner through different methods such as land vehicle and ship transportation, sea (estuary) barge transportation, pipeline sand blowing, or conveyor belt transmission.

[0124] In this embodiment, sand and silt are transported by ship and pipe sand blowing, clay, soft soil and dried mud are transported by mud barge, and the prefabricated wave-breaking regeneration product 7 is transported by ship.

[0125] In this embodiment, the prefabricated wave-breaking regenerated product 7 is transported by land to the wharf along the inland waterway by dump trucks, and then shipped to the island in the engineering sea area by ship; sand and silt are transported by land to the wharf along the inland waterway, transferred to mud barges and transported to the closed line of the spatial layout of the outer wall of the artificial island near the engineering sea area and the backfill position inside the island, and blown and filled by mud pumps; clay, soft soil and dried engineering mud are transported by land to the wharf along the inland waterway, transferred to mud barges through the estuary and offshore waterway to the island in the engineering sea area, and then transported to the filling site by scrapers or dump trucks.

[0126] The method for constructing an artificial island at sea provided by the present invention can solve the problems of occupying valuable urban land resources in the traditional land-based construction waste treatment and disposal, as well as the potential pollution and damage to the water ecological environment of the consumption area, and the water safety risks caused by flood control and drainage, etc., and can also solve the problems of the source of a large amount of earthwork required in the construction of artificial islands at sea and the ecological damage caused to the ecological environment of the project area or the surrounding sea areas by the traditional offshore sand blowing island construction method. At the same time, it can also reduce the energy consumption of the traditional island construction method to promote the realization of a carbon reduction development model.

[0127] The method for constructing an artificial island at sea provided by the present invention breaks through the traditional resource recycling methods of using construction waste for slope landscaping, low-lying filling, land reclamation, road construction, production of recycled aggregates and recycled building materials, and innovatively implements the green resource utilization of construction waste at sea for backfilling or regeneration of islands through the coordinated development of land and sea in coastal cities. It not only changes the traditional method of building islands by dredging and blowing sand at a fixed or unselected sand source in a selected estuary or offshore, but also solves the problem of the source of huge earthwork volume for artificially constructed physical islands, and simultaneously solves the bottleneck problem of construction waste disposal in the development of coastal cities, and provides a broad space for its treatment and disposal.

[0128] The method for constructing an artificial island at sea provided by the present invention can recycle the construction waste of large and medium-sized coastal cities into resources, and provide a huge green resource disposal site for the treatment and disposal of filling materials of artificial islands at sea; it avoids the traditional treatment and disposal problems such as disorderly accumulation of construction waste in the vicinity of cities and suburbs, or landfilling in rivers, lakes, ditches and ponds, which not only blocks rivers and lakes, endangers the connectivity of urban water systems, and greatly reduces the water storage capacity, causing regional or basin flood control and drainage safety, but also avoids the dead water areas that are easily formed after disorderly accumulation and landfill of river channels by construction waste, which leads to water pollution and destruction of water ecological habitats. deterioration, and the risks induced by regional or river basin water conservancy safety and water ecological environment safety; it not only changes the traditional method of selecting nearby sand sources to blow and fill islands in the construction of artificial islands at sea, which causes devastating damage to the water ecological environment in related sea areas, but also changes the consumption of electricity or gas energy in the traditional sand blowing and sand dredging construction and transportation, and promotes the formation of a low-carbon and green artificial island construction method; the cost of island construction and backfilling in this resource utilization method only needs to bear the difference between the price of transportation to the artificial island project area (sea) and the price of transportation to the construction waste disposal site, which is economically feasible compared with the traditional method of taking sand to build islands.

[0129] According to an embodiment of the present invention, on the other hand, Figures 3 to 7 As shown, there is also provided an offshore artificial island building structure, which is constructed using the above-mentioned offshore artificial island construction method. The offshore artificial island building structure includes an outer island wall, an inner island dense body and an outer island revetment. The inner island dense body is located inside the outer island wall, and the outer island revetment is located outside the outer island wall.

[0130] In one embodiment, Figure 3 and Figure 4 As shown, the outer island wall includes an outer steel cylinder 1 and a sub-grid 2. The outer steel cylinder 1 is vertically arranged in the sea. Several outer steel cylinders 1 enclose the outer closed edge of the artificial island. The sub-grid 2 connects adjacent outer steel cylinders 1.

[0131] Specifically, in this embodiment, firstly, according to the design plan of the outer space layout of the artificial island body, a certain diameter and a certain number of outer steel cylinders 1 that meet the marine engineering structure quality and engineering specifications are selected or customized. After being shipped to the engineering sea area by sea, the outer steel cylinder 1 is vibrated and sunk to the impermeable clay layer by a matching offshore construction vibrator hammer, and a piece of arc-shaped steel plate is inserted into the inner and outer sides of the adjacent outer steel cylinders 1 by a vibrator hammer, and connected with the outer steel cylinder 1 through a wide mortise and tenon to form a water-stopping auxiliary grid 2 bin, which is constructed as the initial structure of the outer island wall of the offshore artificial island; then, the mud pumping sand process is promptly used in the outer steel cylinder 1 and the auxiliary grid 2 bin to blow sand and backfill the screened engineering slag to increase its structural weight and ensure its stability in seawater; during the closure process, sand and soil are simultaneously blown into the island area, and a stable outer steel cylinder 1 island wall with a water-stop function can be formed after the closure is completed.

[0132] In this embodiment, a mud pump is used to blow sand and silt through a pipeline into the outer steel cylinder 1 and the auxiliary grid 2 to form a stable artificial island wall cofferdam with water-stopping function; after the closure, the cofferdam is continuously filled with sand. Since sand and silt have high water permeability, the seawater is "squeezed" away by continuously blowing sand into the underwater backfill area of ​​the island, thereby promoting the formation of dry land inside the island and forming dry construction working conditions.

[0133] In this embodiment, the size of the outer steel cylinder 1 is not specifically limited. For example, in this embodiment, the diameter of the outer steel cylinder 1 is 22m to 28m.

[0134] In one embodiment, Figure 5 and Figure 7 As shown, the dense body in the island includes a soft body row 3, a first backfill layer 4 and a second backfill layer 5. The soft body row 3 is arranged on the inner side and the outer bottom of the outer island wall, the first backfill layer 4 is arranged on the inner side of the outer island wall and located on the upper part of the soft body row 3, and the second backfill layer 5 is arranged on the inner side of the outer island wall and located on the upper part of the first backfill layer 4.

[0135] Specifically, in this embodiment, the soft row 3 is laid on the inner bottom and the outer bottom of the outer island wall. In this embodiment, the soft row 3 is not specifically limited. For example, in this embodiment, the soft row 3 adopts an E-type mixed soft row. Sand and silt are blown to the construction area on the soft row 3 through a pipeline for underwater filling to form a first backfill layer 4, and then clay and soft soil are transported to the construction area through a mud barge, and combined with sand and silt according to actual project needs to be backfilled on the first backfill layer 4 as a second backfill layer 5.

[0136] In this embodiment, after the island walls are connected to form dry construction conditions, sand blowing and backfilling are carried out in different areas and layers on the water until the designed elevation of the island is met. Then, the density and stability of the filler are enhanced through natural settlement, and the settlement, displacement, etc. are monitored and controlled at any time. Finally, a dense entity of an artificial island at sea is formed so that the base bed can evenly bear the pressure of the upper load.

[0137] In one embodiment, Figure 6 and Figure 7 As shown, the outer revetment of the island includes filling pieces 6 and prefabricated wave-breaking regeneration products 7. Several filling pieces 6 are stacked and arranged on the outer side of the outer island wall, and the prefabricated wave-breaking regeneration products 7 are arranged on the filling pieces 6.

[0138] Specifically, in this embodiment, the filling member 6 is bagged sand filled with sand and silt by sand blowing, and the bagged sand is stacked from the outer wall of the outer steel cylinder 1 to the sea area away from the outer steel cylinder 1 above the soft body row 3 to form a sand-filled pipe bag embankment, and is assisted by the outer riprap to protect the bottom, and the upper part is arranged with bagged crushed stone and other foundations to form an artificial island slope protection structure. The prefabricated wave-breaking regeneration product 7 is assembled and constructed on the slope protection on site to construct a moisture-proof and wave-proof island protection reinforcement body outside the artificial island.

[0139] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for constructing an artificial island at sea, characterized in that: include: Classify and pre-treat construction waste; Transport the classified and pre-treated construction waste to the offshore artificial island project area; Use classified and pre-treated construction waste to construct the outer wall of the artificial island; Use classified and pre-treated construction waste to construct dense physical projects on the artificial island; The classified and pre-treated construction waste is used to construct the outer bank protection project of the artificial island and lay prefabricated wave-breaking recycled products (7).

2. The method for constructing an artificial island at sea according to claim 1, characterized in that: The steps of classifying and pre-processing construction waste include: Conduct non-toxic and harmless testing on construction waste; Sort construction waste into discarded bricks and concrete, discarded bricks and stones, construction debris, construction mud and other waste.

3. The method for constructing an artificial island at sea according to claim 2, characterized in that: The steps of using classified pre-treated construction waste to construct the outer bank protection project of the artificial island and lay prefabricated wave-breaking regeneration products (7) include: The sorted waste brick concrete and waste bricks and stones are used to make prefabricated wave-breaking recycled products (7).

4. The method for constructing an artificial island at sea according to claim 2, characterized in that: The step of classifying and pre-processing the construction waste also includes: The construction waste soil is further screened into sand, silt, clay and soft soil.

5. The method for constructing an artificial island at sea according to claim 2, characterized in that: The step of classifying and pre-processing the construction waste also includes: The engineering mud is dried.

6. The method for constructing an artificial island at sea according to claim 1, characterized in that: The steps of using classified pre-treated construction waste to construct the outer wall of the artificial island include: Determine the spatial layout and engineering design of the offshore artificial islands based on the engineering hydrological and geological characteristics of the proposed project area; Constructing the outer steel cylinder (1) and the auxiliary grid (2); The classified construction waste is backfilled into the outer steel cylinder (1) and the auxiliary grid (2).

7. The method for constructing an artificial island at sea according to claim 1, characterized in that: The steps of using classified pre-treated construction waste to construct the dense entity engineering in the artificial island include: The sorted construction waste will be backfilled in layers in the artificial island area at sea.

8. The method for constructing an artificial island at sea according to claim 1, characterized in that: The steps of using classified pre-treated construction waste to construct the outer bank protection project of the artificial island and lay prefabricated wave-breaking regeneration products (7) include: An artificial island slope protection structure is constructed around the outer side of the artificial island wall; The prefabricated wave-breaking regenerated product (7) is assembled on site on the island slope protection structure to form a wave-breaking and bank protection structure.

9. An offshore artificial island building structure constructed by using the offshore artificial island construction method according to any one of claims 1 to 8, characterized in that: The offshore artificial island building structure comprises: Outer island wall; An inner island dense body, the inner island dense body is located inside the outer island wall; The outer revetment of the island is located outside the outer island wall.

10. The offshore artificial island building structure according to claim 9, characterized in that: The outer island wall comprises: An outer steel cylinder (1), the outer steel cylinder (1) is vertically arranged in the sea, and a plurality of the outer steel cylinders (1) enclose a closed perimeter of the artificial island; A sub-grid (2), the sub-grid (2) connecting the adjacent outer steel cylinders (1).

11. The offshore artificial island building structure according to claim 9, characterized in that: The island secret entities include: A soft body row (3), the soft body row (3) being arranged at the inner side and the outer side bottom of the outer island wall; A first backfill layer (4) is arranged on the inner side of the outer island wall and located on the upper part of the soft body row (3); The second backfill layer (5) is arranged on the inner side of the outer island wall and is located above the first backfill layer (4).

12. The offshore artificial island building structure according to claim 9, characterized in that: The outer revetment of the island includes: Filling pieces (6), a plurality of the filling pieces (6) are stacked and arranged outside the outer island wall; A prefabricated wave-breaking regeneration product (7), wherein the prefabricated wave-breaking regeneration product (7) is arranged on the filling member (6).

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