50 results about "Coastal reclamation" patented technology

The invention discloses an electro-osmosis consolidation shearing device. The electro-osmosis consolidation shearing device comprises a frame, a vertical loading system, a horizontal shearing loading system and an electric insulation experiment box, wherein the frame comprises a bottom frame and a portal frame; the bottom frame is fixedly connected with the portal frame; the vertical loading system is fixedly connected to the upper wall of the portal frame, and comprises a shaft pressure air cylinder, a shaft pressure displacement electronic sensor and a shaft force sensor; the electric insulation experiment box comprises electrode tubes, an upper shearing box and a lower shearing box; during an electro-osmosis experiment, soil is placed in the upper shearing box and the lower shearing box, and the electrode tubes are inserted into the soil. The electro-osmosis consolidation shearing device is high in experiment efficiency, small in occupation area, convenient to operate, compact in structure, accurate and reliable in determination result, and applicable to an indoor or field experiment for the electro-osmosis test on soft clay and mucky soil in eastern coastal regions and the Pearl River Delta region, and serves for solving the related engineering problems of foundation deformation and stability parameter determination in geotechnical engineering problems of foundation treatment, coastal reclamation, port revetment and the like.

The invention belongs to the technical field of soft soil foundation treatment in geotechnical engineering, and particularly relates to a treatment method for a soft soil foundation in a coastal reclamation region. The soft soil foundation consists of a soft soil layer and a post-pumping filling soil layer covering on the soft soil layer, wherein the region comprises a deep layer treatment region and a non-deep layer treatment region. The treatment method comprise the following specific steps that long plastic drain boards are arranged in a beating manner before a pumping filling soil layer is formed in the deep layer treatment region; the heights of the long plastic drain boards are greater than the elevation of the pumping filling soil layer; then the pumping filling soil is formed; short plastic drain boards are arranged in a beating manner in the non-deep layer treatment region; and finally vacuum preloading is conducted in a large area in a partitioning manner. The treatment method has the advantages that treatment is finished by one step; pumping filling soil can be used as a load for accelerating consolidation settlement of the soft soil layer in the deep part during the pumping filling period; the construction period is saved; the manufacturing cost is lowered; and waste due to the conventional multistep and repeated treatment is reduced.

The invention provides a biochar grassed slope structure for a coastal reclamation district channel. The biochar grassed slope structure is composed of a turf protection layer, a biochar soil recovery layer, a straw water guide layer and a crushed stone water draining body from top to bottom. The turf protection layer is fixed through cross-shaped wooden piles. The biochar soil recovery layer is formed by mixing biochar, flue gas desulfurization gypsum and local topsoil, and a good substrate is provided for the growth of turf. The straw water guide layer is manufactured by crushed straw with different lengths, and the lengths of the straw are gradually reduced from top to bottom according to the structure of an inverted filter layer. The crushed stone water draining body is arranged at a slope bottom, residual water collected in the straw water guide layer is removed timely. On one hand, the good carbon collecting function of the biochar can be utilized, the soil salinity and alkalinity of a reclamation district is improved, and sufficient nutrition is provided for the growth of the turf, and a slope surface is protected better by the turf. On the other hand, the water guide layer made of the straw prevents salt from accumulating in deep soil, seepage deformation is avoided through the structure of the inverter filter layer, a side slope is protected, and the overall structural performance and stability of the side slope are effectively enhanced.

The invention discloses an experimental apparatus and method for simulating the influence of the underground water level of a coastal reclamation area on water-salt movement. A transparent cuboid soil box is placed into a transparent underground water level control box; a moisture sensor installing hole, a salinity sensor installing hole, a temperature sensor installing hole and a sampling hole are formed in the side wall of the soil box along a direction parallel to the center line of a column body at different radial heights; a filter layer is formed at the bottom of soil in the cuboid soil box, and is wrapped with non-woven cloth; a water flow hole is formed in a side wall which is at the same height as the filter layer; a detachable grid movable plate is arranged on the side wall of the cuboid soil box; an infrared lamp or an incandescent lamp is arranged above the cuboid soil box; a water pipe and a water valve are arranged at positions, which are close to the bottom, on the underground water level control box. By adopting the experimental apparatus and method, soil water-salt movement under the condition of rising of the underground water level due to seawater intrusion in the coastal reclamation area can be simulated, real-time dynamic monitoring can be performed, and the soil water-salt movement rule can be researched by changing different experimental conditions such as different water qualities and water levels in the underground water level control box.

The invention relates to foundation treatment, and in particular relates to a novel foundation treatment method. According to the adopted technical scheme, the method comprises the following steps: performing directional drilling along an engineering trend by using a non-excavation technology, and forming a channel; arranging a grouting pipeline in the formed channel; and performing grouting operation. By adopting the method, people can perform rock foundation construction conveniently, foundations are reinforced, the foundation bearing capacity is increased, foundation settlement is reduced, soil body permeability is reduced, and the risk of tunnel excavation is lowered. The method can be applied to road and site work such as roads, railways (including railways), tunnels, box culverts, airfield runways, parking aprons and container wharfs, water conservancy projects such as seepage prevention in rivers and lakes, building of great aqueducts, anti-seepage dams of rivers and lakes, dams, impounding reservoir projects, water conveyance canals, cutoff walls, settling ponds, water-saving irrigation channels, ports and piers and coastal reclamation, sewage treatment, environmental engineering and the like.

The invention discloses a feed additive for sea crabs and a preparation method of the feed additive. The feed additive is prepared from the component in parts by weight as follows: 105-120 parts of anoleic acid solution of saline-alkali-resistant modified and irradiation splitting modified bamboo leaf extract. The feed additive is mainly applied to high-quality sea crabs, the specially extractedbamboo leaf extract is subjected to targeted modification treatment and is reasonably combined and properly applied, the advanced feed additive which is resistant to saline-alkali, capable of improving meat quality, improving cold nature of sea crab meat and increasing nutritive value of the sea crabs and adaptive to coastal reclamation free-ranging is obtained, the blank of the industry is filledup, and the feed additive has great significance for environment-friendly ecological sea crab breeding.

The invention discloses an anticorrosive preformed pile which is characterized in that pile links 0.5-25 cm greater than a pile body in diameter are arranged on the pile body of the preformed pile at intervals of 0.3 4 m; and the pile body is coated with waterproof asphalt, and 0.5-25cm thick sand or gravel is coated outside the waterproof asphalt. A manufacturing and constructing method of the anticorrosive preformed pile comprises the following steps of: binding a steel reinforcement cage and putting the steel reinforcement cage into a preformed pile template with the pile links, pouring concrete; after the desired strength of the concrete is achieved, spraying the waterproof asphalt to the pile body or lifting and putting the pile body into a holt melt asphalt tank to be soaked in the waterproof asphalt; lifting the pile body by a pile machine and standing the pile body in a pile position; heaping sand or gravel on the pile position; and piling or pressing the pile body into the soil so that the pile tip and the pile links on the pile body squeeze away the soil layer and the sand or the gravel, and then the soil, the sand or the gravel are conveniently filled around of the pile. The anticorrosive preformed pile and the steel reinforcement are prevented from being corroded by underground water; the bearing capability of the pile is improved, the drainage of stressed water in the soil layer is accelerated, the solidification of the soil around the pile is sped up, and the frictional force of the soil around the pile is improved; and the anticorrosive preformed pile is suitable for building foundation engineering in newly developed saline-alkali regions or new coastal reclamation regions in China.

The invention discloses a lap joint method for a sudden changing part of a scour-preventing bottom-protecting soft mattress. The lap joint method comprises the following steps: 1, manufacturing an inclined tower mattress on land; 2, paving the inclined tower mattress; and 3, paving the soft mattresses at two connected ends. The lap joint method has the advantages that the manufacturing for the lap joint mattress is simple and the construction progress is effectively quickened; the materials are saved and the cost is low; a scouring pit caused by unsmooth water flow at edges resulted from the conventional mattress lap joint is reduced; and the protecting effect for the bottom protector is increased. The lap joint method is suitable for various bottom-protecting projects, such as coastal reclamation and causeway, port breakwater, shipping lane, river channel retaining wall, and the like, and is especially suitable for embankment sections with violent change in beach face in front of the embankment and frequent change in bottom-protecting width.

The invention discloses a method for promoting siltation and sand consolidation on a beach by utilizing natural energy, and belongs to a coastal reclamation technology in coastal engineering. The method comprises the following steps: investigation, geological survey, design planning, damming and sluice-building, siltation promotion and water drainage, and mud conveying and sand consolidation. The method is characterized in that sediment deposition is promoted by utilizing natural energy of tides according to the principle of adjusting measures to local conditions and making the best use of the circumstances. Clearance electric energy of a plurality of pieces of power generating equipment is collected to establish a natural energy power station for supplying power to sediment conveying equipment. Sand consolidation is carried out by adopting methods of filling geotextile bags, mixing with a dehydrating hardening agent and biologically hardening. The method has the characteristics of adopting a multi-point formation process, being gradually expanded, being green and low-carbon, being energy-saving and environmentally-friendly, and being remarkable in benefit. Moreover, materials are saved, energy consumption is reduced and labor power is saved, so that the method is green and environmentally-friendly, and is safe and reliable. The method is used for dissipating waves, promoting siltation, consolidating sand and protecting a slope, so that irregular accumulation of sediments is improved, beach elevation is improved, a large number of land resources are obtained, and ecological balance is kept.

The invention provides a novel formula for reclamation shoal soft soil suitable for ultra soft soil hydraulic reclamation method. The formula comprises the following components, by mass part: 10 parts of dry soil powder, 2.40 parts of cement, 0.72 part of water glass, 0.576 parts of fly ash, 0.132 part of silicone powder, 0.12 part of gypsum powder, 6.08 parts of water, and 0.072 part of py4 composite admixture. According to a large number of indoor orthogonal experiments by the invention, reinforcement soft soil for hydraulic reclamation and water drainage method in Wenzhou coast, which mainly includes sludge reclamation, is mixed with cement and a plurality of admixtures and compound additives, and pressure resistance, shear resistance and compression performance of the soil can be greatly changed; and compared with s conventional cement formula, the novel formula consumes less supplies, but can greatly improve pressure resistance, shear resistance and compression performance of cement shoal soft soil, especially improve early compressive strength and significantly reduce settlement after construction. Therefore, the formula has important meaning for large area utilization and construction of ultra soft soil hydraulic reclamation coastal reclamation land in coastal southeastern industrial belt.

The invention relates to a coastal reclamation land ecological restoration and greening method comprising the steps of landform finishing, land surface processing, vegetation construction, draining arrangement and later maintenance, etc. Starting from the angle of ecological restoration, the method follows the principle of respecting the nature, acting according to the circumstances and saving resources so that the disadvantages of the existing treatment method can be overcome, the surface vegetation system is constructed in a relatively short period of time by using the technical methods of landform finishing, water treatment landscapes, land coverage, soil seed bank utilization and plantation of proper plants and thus the objectives of coastal reclamation land ecological restoration and greening can be realized.

The invention relates to a method for accelerating insertion of a pioneer plant suaeda salsa in a coastal reclamation land area. The method comprises the following steps that 1, land levelling is performed; 2, uniform scribing is made according to the separation distance of 25-75 cm; 3, down digging is performed along an oblique plane every two scribing zone, soil dug out is uniformly piled in adjacent non-dug scribing zones, wherein dug bottom surface slope angles are greater than or equal to 105 degree but are smaller than or equal to 135 degrees, and the digging depth is 7.5-17.5 cm; 4, thedug soil oiled in the non-dug scribing zones are spread flat and ridged to form ridge tables; 5, adjacent ridge table tops are covered with film every two ridge table tops ridge by ridge; 6, strip-shaped holes are formed at the positions, 1 / 2-1 / 3 away from the bottom of furrowed land, on two side faces of each uncovered ridge table; 7, suaeda salsa seeds are sowed in the strip-shaped holes according to the amount of 10-20 g / m; 8, the side faces of the uncovered ridge tables are pat-pressed and levelled. The method is simple in structure and good in operability, and quick desalination and desalting of the coastal reclamation soil are achieved.

The invention provides a method for treating coastal saline soft ground by jetting industrial waste slag into two-way nail-shaped mixing piles. The method comprises the steps of: removing sundries on the surface of the site to be treated, and leveling the site; Identify each pile position and mark it; according to the pile position identification, move the two-way nail-shaped pile mixer into place and align the specified pile position; first spray and first stir the composite curing agent slurry; second spray and second stir waste tire rubber powder; The invention uses a variety of industrial waste residues to prepare a composite curing agent, which can not only treat the coastal salt-stained soft foundation formed by tidal flat reclamation on a large scale, but also solve the problems of land occupation and environmental pollution by various wastes, and achieve good economic and social benefits. And environmental benefits, has a relatively broad engineering application prospects.

The invention discloses a high-bearing-capacity sand filling pipe pile with pile joints, which is characterized in that the pile joints 0.5-20 cm larger than a pile body are arranged on the pile body of the pipe pile at intervals of 0.3-4 m; the width of each pile joint is 0.5-20 cm; longitudinal drainage holes are formed in the pile joints; filled sand or gravel about 0.5-20 cm thick is arranged outside the pile body; a pipe pile part or a precast pile capable of entering a harder supporting layer is arranged at the lower part of the pile body; and a pile tip is a steel pile tip or a reinforced concrete pile tip with a steel sharp corner. Compared with the prior art, stress water in a soil layer caused by piling can be drained economically, effectively and more quickly along the filled sand or the gravel at the periphery of the pile; mucky soil solidification can be accelerated; side friction resistance of soil at the periphery of the pile can be increased; the pipe pile part or the precast pile at the lower end of the pile can be punctured into the harder supporting layer to increase end bearing force; and the pile is applicable to coastal reclamation regions of China.

The invention discloses a drainage ditch compound section wrapping type grass mat slope protection method for coastal reclamation areas. The method is performed according to the following steps: (1) constructing a drainage ditch compound section, wherein the drainage ditch compound section comprises a groove, groove side slopes, a bottomland, swale side slopes, slope tops and ridge side slopes; (2) using a grass mat to perform integrated wrapping coverage on the swale side slopes, the slope tops and the ridge side slopes and perform the integrated wrapping coverage on the groove side slopes and the bottomland by being vertical to the central line of the groove; and (3) nailing wood piles at the overlapped parts and the corners of the grass mat, arranging the wood piles in rows and columns at intervals of 1.5-2m and then binding iron wires on the wood piles in a diagonal crossing form. According to the drainage ditch compound section wrapping type grass mat slope protection method disclosed by the invention, the integral structure and the stability of the side slopes are improved, the erosion of the side slopes can be effectively reduced, and the occurrence of soil collapse and landslide phenomena can be prevented.

It is a major nation strategic plan for the development of the agriculture after the coastal reclamation of tidal flats, however, the soil of the newly reclaimed tidal flat is featured by high salinity and low nutrient, which seriously limits the process of agricultural development in the tidal flats. The invention relates to a method and application for rapidly developing natural biological membrane of beach reclamation soil, in particular to a method and a material for rapidly and extensively developing natural biological membrane of the soil surface of the coastal beach seriously salty and in situ. The natural biological membrane is enriched by inoculating prepared natural soil suspension and the soil in situ, and the soil natural biological membrane is accelerated and expanded by some technical methods, which can effectively control soil salinization, enhance soil nutrient content and improve beach soil, so as to provide a strong guarantee for the sustainable development of coastal beach agriculture.

The invention discloses a model device for measuring negative frictional resistance of a pile foundation in under-consolidated soil, which comprises a model box, a soil body is arranged in the model box, a lower load plate is arranged on the upper surface of the soil body, a loading system is arranged on the lower load plate, a model pile is arranged in the middle of the model box, the model pile is partially inserted into the soil body of the model box, a plurality of strain gauges are arranged on the portion, arranged in the soil body, of the model pile, the strain gauges are connected with a strain gauge outside the model box through wires, a plurality of pore water pressure gauges and a plurality of settlement marks are arranged in the soil body, the pore water pressure gauges are connected with a pore water pressure receiver, the settlement marks are connected with a dial indicator, and a plurality of drainage valves are arranged at the bottom of the inner side wall of the model box. According to the model device, basic test data such as pile foundation axial force, negative friction resistance and pore water pressure in under-consolidated soil in a coastal reclamation area and layered settlement of soil bodies with different depths are obtained through simulation, the bearing capacity of the pile foundation in the under-consolidated soil is obtained, and practical engineering is guided.

The invention discloses a vacuum sludge filling bag and relates to equipment for a cofferdam in a coastal reclamation project and a project of land reclamation by mud hydraulic. The vacuum sludge filling bag comprises a bag body and sludge filled in the bag body, wherein drain boards arranged at intervals are uniformly fixed at the bottom of the bag body, and connected into a circle through double-hand board joints at the upper parts of the drain boards; each double-hand board joint comprises connecting pipe sections at two ends, a straight pipe in the middle, and two hollow case bodies vertically communicated with the straight pipe in the middle; the drain boards are inserted into the hollow case bodies; the two connecting pipe sections of each double-hand board joint are connected with a vacuumizing pipe; when the bag is in use, a complete vacuum system can be formed in the bag; the sludge can be separated from water within a relatively short time; the sludge in the bag is solidified rapidly; and a trapezoid dam body and the cofferdam formed by overlying several layers of bags are good in sealability, and are not easily pervious to water; the safety of the dam body is improved; low carbon and environmental protection are realized; resources are saved in deed; and the vacuum sludge filling bag is applicable to the coastal reclamation project and the project of land reclamation by mud hydraulic.

The invention provides a method for breeding boleophthalmus pectinirostris in a coastal reclamation mudflat by utilizing natural baits obtained through proliferation of nutrient sources in penacus orientalis breeding wastewater. The breeding benefits are remarkable, a mangrove forest purifies water at the same time, the method is a sustainable development breeding method, and a solution is provided for utilizing the reclamation mudflat in the southeast coastal area and relieving sharp contradiction between mangrove forest and mudflat breeding.

The invention provides a grooving reinforcing structure for an ultra-deep underground diaphragm wall in a coastal reclamation area and a construction method thereof. The structure comprises an upper reinforcing structure within the range of 30m and a lower reinforcing structure within the range of 30m or below. The upper reinforcing structure is reinforced and formed through a three-axis mixing pile, the quality is good, and a good reinforcing and water stopping effect is achieved. Within the range of 30m or below, due to the fact that the water and soil pressure of the coastal reclamation area is large, the reinforcing effect cannot be guaranteed through a single groove wall reinforcing manner, a high-pressure jet grouting pile is adopted for reinforcing firstly, and then the defects possibly existing in the high-pressure jet grouting pile are overcome through sleeve valve grouting. The grooving reinforcing structure combines the advantages of the three-axis mixing pile, the high-pressure jet grouting pile and sleeve valve pipe grouting, a good groove wall reinforcing effect can be achieved during underground diaphragm wall construction, the grooving reinforcing structure is particularly suitable for grooving reinforcing of the ultra-deep underground diaphragm wall in the coastal reclamation area, and the groove wall reinforcing method is safe, effective, economical and reasonable.

The invention relates to the technical field of coastal reclamation area soil improvement and coastal energy complementation, in particular to a coastal reclamation area wind energy-solar energy-fishery-reservoir-agriculture three-dimensional complementary layout system. The system comprises a wind power generation module, a photovoltaic utilization module, a plain reservoir, a fishery breeding module and an agricultural planting module; the plain reservoir is a plain reservoir at a coastal area; photovoltaic utilization modules are evenly installed on the periphery of the plain reservoir; the photovoltaic utilization modules store converted electric energy in an energy storage device; and wind power generation modules are fixedly installed on the peripheries of the two sides of each photovoltaic utilization module. With the coastal reclamation area wind energy-solar energy-fishery-reservoir-agriculture three-dimensional complementary layout system of the invention adopted, the fishery breeding variety and agricultural planting structure of the coastal reclamation area can be enriched, the coastal deep water freshwater fish breeding technology can be developed, and the planting market of coastal tropical crops, spices, specific drugs and the like can be expanded; and meanwhile, the inherent defects of unstable generated power and electric quantity of single wind power generation or photovoltaic power generation can be overcome, so that the difficulty of accessing the electric quantity of a power grid is reduced.

The invention discloses a method for promoting siltation and sand consolidation on a beach by utilizing natural energy, and belongs to a coastal reclamation technology in coastal engineering. The method comprises the following steps: investigation, geological survey, design planning, damming and sluice-building, siltation promotion and water drainage, and mud conveying and sand consolidation. The method is characterized in that sediment deposition is promoted by utilizing natural energy of tides according to the principle of adjusting measures to local conditions and making the best use of the circumstances. Clearance electric energy of a plurality of pieces of power generating equipment is collected to establish a natural energy power station for supplying power to sediment conveying equipment. Sand consolidation is carried out by adopting methods of filling geotextile bags, mixing with a dehydrating hardening agent and biologically hardening. The method has the characteristics of adopting a multi-point formation process, being gradually expanded, being green and low-carbon, being energy-saving and environmentally-friendly, and being remarkable in benefit. Moreover, materials are saved, energy consumption is reduced and labor power is saved, so that the method is green and environmentally-friendly, and is safe and reliable. The method is used for dissipating waves, promoting siltation, consolidating sand and protecting a slope, so that irregular accumulation of sediments is improved, beach elevation is improved, a large number of land resources are obtained, and ecological balance is kept.

The invention belongs to the technical field of the coastal reclamation and siltation promotion and in particular relates to a perforated block lifting appliance for the construction of a siltation promotion embankment. The perforated block lifting appliance comprises a top plate, a bottom plate and multiple stand columns arranged between the top plate and the bottom plate, wherein all the stand columns form a middle frame with a rectangular cross section, multiple lifting lugs are fixedly connected on the upper surface of the top plate, a vertical supporting plate is fixedly connected at the edge of one side of the upper surface of the top plate, a horizontal shaft sleeve is fixedly connected at the edge of the other side of the upper surface of the top plate, a lever is articulated at the top part of the supporting plate, the inner end of the lever is extended to the central line of the middle frame, the outer end of the lever is fixedly connected with a handle, and a pin is arranged in the shaft sleeve; a left overturning plate and a right overturning plate are articulated at the edges of the left side and the right side of the bottom plate respectively, and tension springs are both connected at the inner sides of the left overturning plate and the right overturning plate; the perforated block lifting appliance also comprises a sling, the top end of the sling is connected with the inner end of the lever, the bottom end of the sling is connected with the inner ends of two tension springs, a center hole is formed in the middle of the top plate, and the center hole penetrates through the middle-upper part of the sling and a lantern ring is arranged at the position of the middle-upper part of the sling.

The invention discloses an irrigation-drainage ditch slope revetment device for coastal reclamation areas, which comprises a hard retaining plate and a soft revetment. The hard retaining plate is disposed on the inner side of a slope and is perpendicular to the ground. The soft revetment matched with the slope in inclination is disposed on the outer surface of the slope. One end of the soft revetment is connected with the top end of the hard retaining plate, and the other end of the soft revetment is fixed to the bottom of the slope. The soft revetment comprises a mesh layer and a geotextile layer, the geotextile layer is laid flat on the outer surface of the slope, and the mesh layer is disposed on the outer side of the geotextile layer. By means of the irrigation-drainage ditch slope revetment device, deformation, collapse and deposition of soil slopes of drainage ditches in soil improvement for coastal reclamation areas can be improved effectively, and the geotextile layer with an anti-seepage function enables smooth drainage, salt leaching and irrigation. The irrigation-drainage ditch slope revetment device is convenient in assembly and disassembly, reusable and reclaimable and suitable for different sizes and types of cross sections, and meets the irrigation-drainage ditch slope requirements in soil improvement for coastal reclamation areas.

The invention discloses a processing method of a bearing pile composite foundation structure via a backfilling disposing reinforcement module. The method is characterized by comprising the following steps, carried out on an undisturbed soil foundation or processed foundation, that 1) a modularized soil pressurizing and forming device carries out pressurizing compaction drainage and consolidation on the soil to form a pit; and 2) the molded pit is backfilled with at least one selected from A) modified soil, B) a granular material, C) concrete and D) a reinforcing tube bag wrapping the granularmaterial. The modularized soil pressurizing and forming device comprises a top rack, a pressurizing and molding module and a soil intensity detector, and the pressurizing and molding module comprisesprotruded bodies. The soil is extruded for drainage and molded rapidly, and the processing method is suitable for process reinforced composite foundations of coastal reclamation, roads and railways, airports, harbor stockyards, trestles, slope protection, dams, industrial and civil construction and the like.

The invention discloses a method for fast obtaining mineralization degree, Na<+> and Cl<-> in a coastal reclamation area mudflat surface water. The method comprises the following steps of 1, determining the EC value x of the coastal reclamation area mudflat surface water; 2, substituting the surface water EC value x determined in the first step into a surface water mineralization degree determination formula; calculating the surface water mineralization degree y1; repeating the step; calculating the Na<+> and Cl<-> contents of the surface water; 3, judging the affiliated interval of the mineralization degree according to the surface water mineralization degree y1, the Na<+> content y2 and the Cl<-> content y3 calculated in the second step; 4, judging the surface water quality type according to the affiliated interval of the surface water mineralization degree; further judging whether the surface water is suitable for plant irrigation or not. The method provided by the invention meets the requirements of mineralization degree and Na<+> and Cl<-> dynamic monitoring during the municipal administration, civil engineering and greening building of coastal reclamation area mudflat.

The invention discloses a construction method for a shield tunneling machine to start from a coastal blow filling stratum with ultra shallow covering soil and a large longitudinal slope. The construction method comprises the following steps that (1) a starting end soil body is strengthened, specifically, the starting end soil body is strengthened by adopting high pressure jet grouting piles with the coordination of tri-axial mixing piles; (2) hole door pre-buried steel rings and external rings are installed, and grouting holes are reserved; (3) a starting concrete base is prefabricated, positioned and installed; (4) a starting bracket and a counter-force frame are positioned, installed and strengthened; and (5) the shield tunneling machine starts to enter a hole and perform tunneling, specifically, the starting state of the shield tunneling machine is reasonably selected, and the center line of the shield tunneling machine is kept coincident with the center line of the tunnel design. The construction method is suitable for the coastal blow filling stratum with the ultra shallow covering soil (the starting section covering soil thickness is less than or equal to 5 m) and the large longitudinal slope (the designed longitudinal slope is larger than or equal to 2%), the shield attitude control is good, ground deformation and uneven settlement can be effectively prevented, the segment assembling quality at a starting stage is ensured, the defects of dislocation, breakage, water leakage and the like are reduced, and the smooth starting of the shield tunneling machine is escorted.

The invention relates to a low-cost temporary greening device for a coastal reclamation high-saline and alkaline city building reserve land. The device comprises a water supply case, a planting soil case, a supporting column and a water guiding system for connecting a water in the water supply case and a soil layer in the planting soil case; and the planting soil case is positioned in the water supply case, the supporting column is arranged at the bottom of the planting oil case, and a water supply port and a drain port are formed on the side wall of the water supply case. The greening device provided by the invention is simple in structure, convenient to process and manufacture and easy to move and place, can be repeatedly used, and is long in service life cycle which can reach longer than 10 years.