278results about "Land reclamation" patented technology

A dynamic compaction soft foundation reinforcing method by combing layered dead weight and pre-pressing drain concretion includes: filling a water-isolation cofferdam; a water collecting well is arranged in the middle of the cofferdam; a sand layer of 0.5m to 0.8m is filled by hydraulically filled or manually filled on the original water-drained ground; a horizontal drain pipe is embedded in the sand layer to carry out first earth hydraulic filling; a drain pump is arranged in the water collecting well to continuously drain water; when the thickness of hydraulic filling reaches the designed elevation of the first layer, the hydraulic filling is stopped; when the surface of the hydraulic filling earth forms a hard shell layer with a thickness of 30m to 40m under the actions of vaporizing and dead weight drain, the hydraulic filling to a second layer and a third layer are carried out according to the steps; even a required hydraulic filling height is designed; finally hill-skill soil or mixed backfill soil and sandy soil are back filled on the layers; dynamic compaction is carried out after leveling. The invention has the technical economic indexes of fast speed, saving investment, small settlement after construction and high surface layer bearing capacity, etc., and has remarkable technical advantages on lower ground elevation and the projects of polder reclamation by hydraulically fill the soft soil like silt.

The invention relates to a three-dimensional network drainage device for accelerating the consolidation speed of the drainage of filled silt. The device is composed of a ripple pipe, a plastic drainage plate and a pumping-drainage pipe, water inlet holes are evenly distributed on the side wall of the ripple pipe, geo-filter cloth is wrapped at the outside thereof, medium-coarse sand with 50cm to 60cm is filled at the bottom part of the ripple pipe, the plastic drainage plate and the ripple plate are connected by adopting the geo-filter cloth for binding, the lower part of the pumping-drainage pipe is processed into a perforated pipe to be inserted in the medium-coarse sand at the bottom part of the ripple pipe, the upper part is connected with an outer pumping-drainage system by a connector to form the three-dimensional network drainage device; a drainage pipe network in the silt filling and the consolidation processes can be connected with an outer pumping-drainage device, thereby realizing the whole process of drainage and improving the drainage efficiency and the speed.

The invention discloses a treatment method for blow-filling a foundation on islands and reefs in South China Sea with carbonate sand. The method comprises the steps that 1, construction and measurement are conducted; 2, a conveying pipe is laid; 3, a dredge boat sucks seabed carbonate sand; 4, a microorganism bacteria solution and a nutrient solution are prepared; and 5, materials are sufficiently aerated and stirred in a mixing tank. The treatment method has the beneficial effects that a microorganism curing agent is added into the mixing tank, so that microorganisms and the carbonate sand are sufficiently stirred and mixed in the mixing tank, then the mixed carbonate sand blow-fills a reef, and then the processed foundation is formed. In this way, after a period of time, the strength, deformation and stability of the processed foundation formed by the mixed carbonate sand all meet the engineering construction requirement, and other redundant foundation treatment measures are not needed. The treatment method has the remarkable characteristics that construction is convenient, the project cost is low, the construction period is remarkably shortened, and pollution to the environment is avoided.

Disclosed is a construction method for carrying out sea reclamation with sand in a shallow sea area through a cutter suction dredger. The cutter suction dredger comprises a cutter suction head, a suction pipe, a power system and a ship body. The cutter suction dredger adopts a mechanical reamer of the cutter suction head to ream the underwater sand soil layer through the power system, and then mechanically excavates and sucks soil through a mud pump of the power system. The sucked sand soil is conveyed to the destination through a pipeline conveying mode, and the construction method for carrying out sea reclamation with sand in a shallow sea area is realized through water separation and sand sedimentation. The construction method includes the steps that A, machines are arranged in place; B, a sand blasting guide pipe is laid; C, soil is sucked in a cutting mode and excavated; D, soil sediments to make land. The sand sedimentting on the seafloor serves as the filling materials of a sea reclamation structure. Cutting of coastal line resources is effectively reduced. The original ecologic environment of the sea is protected to the maximum extent. The work procedures of slurry excavation, conveying, discharging, processing and the like are finished at a time, so that the construction efficiency is improved.

The invention discloses a method for building a sea filling embankment. The method comprises the following steps: a bearing stratum is selected; an embankment cross section is selected; throw-filling parameters are determined; explosion parameters are determined; and embankment body throw-filling, embankment head explosion-filling, embankment top supplement-filling and embankment side explosion-filling are implemented. The method of silt squeezing and rock filling by blasting disclosed by the invention is conducted in a manner that explosive groups are buried and placed in a muddy soft foundation with a certain distance and depth from the outer edge of a rock body, a cavity is formed in silt at the blasting initiation moment, and then the riprap rock body fill the cavity and form a rock tongue, so as to achieve the aim of replacing the silt. The silt is extruded outwards through explosion, and the quantity of the extruded silt is the engineering quantity within the range of the embankment, so that compared with the dredger operation, the engineering quantity of the silt needing to be cleared is greatly reduced, and affected zones of a water area and that under water are greatly reduced at the same time. Materials such as mounting cutting rocks, and the like are firstly filled into the bearing stratum, and then fillers act on the bearing stratum through silt squeezing by blasting, so that the working steps are reduced, the construction cost is greatly shortened. Therefore, the building method has very obvious advantages on the aspects of construction speed, engineering cost and economic benefit.

The invention relates to a construction process for blowing-filling sludge and reclaiming land from sea and a device thereof. The device comprises a sludge dehydrating and grading system A, a solidification treatment system B and an improved slurry paving system C. The construction process comprises the following process flows: (1) in a designated area, blowing-filling the slurry discharged according to a common blowing-filling process or by an overflow device to a designated level to form a foundation slurry layer; (2) paving a permeable isolating layer e on the surface of the foundation slurry layer; (3) feeding sludge slurry a into the sludge dehydrating and grading system A to make the coarse concentrated slurry with low water content and coarse grain diameter enter a slurry and curing agent mixing device; (4) conveying a curing agent of a curing agent storage device to the slurry and curing agent mixing device through a curing agent conveying device; (5) stirring the slurry and the curing agent, and evenly stirring a mixture of the slurry and the curing agent through a discharge device to form modified slurry to be conveyed to a required place; and (6) adopting the paving system to pave the modified slurry to the designated thickness on the permeable isolating layer e layer by layer.

The invention discloses a method for reclaiming land around sea, which aims to build a firm dam around the sea capable of resisting the impact of windstorm and tide in a coastal shallow sea area with water depth of 3-5 meters and encircles to form the land in the dam around the dam. The method comprises the following steps: placing sink boxes special for reclaiming land around sea in the shallow area at the sea bottom in the shallow area and connecting to form a dike around the sea; then floating the sink boxes on the sea and tracking the sink boxes to the preset position of the dike; filling silt into the sink boxes to sink and connect the sink boxes; adding pile fixed sink boxes inserted into the sea bottom into the sink boxes; and blowing and filling the land higher than the sea level inside the dam around the sea so as to improve the capability of the dike for resisting the impact of tidewater and the stability of the dike, wherein the sink boxes are rectangular reinforced concrete box bodies and produced by large batch flowline production on the land. The method is applicable for reclaiming land around sea on the shallow area and has high construction efficiency, low cost, good economic benefit and safe construction.

A system and method for restoring wetland habitats and providing a platform on which indigenous and transplanted plant species can thrive. Water from a source, such as, stormwater run-off is captured and filtered through a combination of sand berms and riffle weirs to a series of aquatic beds, thus creating nutrient-rich environment.

An amphibious dredging vehicle includes a base including a pair of floatable pontoons linked together in essentially parallel relation; a cutterhead dredge system that is mounted on the base and that includes a cutterhead mounted on the front end portion of the base, a first directable discharge mounted to the rear end portion of the base, and a dredge pump in operative connection with the cutterhead and the directable discharge so as to develop suction at the cutterhead and to propel material from the cutterhead to the directable discharge. The directable discharge is configured so that the operator can aim the directable discharge in order to use the dredge pump to propel the amphibious dredging vehicle through water. The amphibious dredging vehicle may be used as part of a system and may be used with a method for building up land in a water-covered or water-surrounded area.

A method of making an island including the steps of: manufacturing a plurality of formations; transporting the formation to a site in a water body; assembling said formations proximate one another; said formations defining an artificial island structure with both below and above water line components. Methods are described, as well as methods and components for both island and existing island and land enhancements.

The invention provides a technical method for treating polluted bed-mud of rivers, lakes and reservoirs, and provides a safe, energy-saving, environment-friendly and low-cost treatment method to overcome defects of methods for treating polluted bed-mud of lakes and reservoirs. The method comprises the following steps of: creating an island for landfill, dredging in an environment-friendly way, dehydrating and reducing volume by using geotextile tubes, and performing closure cover, so that a polluted lake and reservoir area is transformed into an environment-friendly landscape island. The method has the advantages that: secondary pollution is avoided in the treatment process, a process is simple, the water content of the treated sludge is low, and the treated sludge is conveniently subjected to landfill in situ; and three aims of dredging the sludge, performing treatment and landfill in situ, and dehydrating and reducing volume of the sludge are fulfilled.

The invention discloses a modified phosphogypsum material used for sea reclamation. Phosphogypsum is modified by raw material selection and proportioning so as to make the phosphogypsum suitable for sea reclamation. The materials comprise phosphogypsum and composite yellow phosphorus slag gelling powder. The composite yellow phosphorus slag gelling powder is mixed powder composed of crushed water-quenched yellow phosphorus slag generated in a yellow phosphorus production process and cement clinker. With the characteristics of high fill strength, fast curing speed, good water resistance and high compressive strength, the modified phosphogypsum material used for sea reclamation provided by the invention not only can meet the compressive strength requirements of road building, wharf construction and the like, but also can make heavy use of the solid waste in the phosphorus chemical industry, thus solving the constraint bottleneck problem of waste residue utilization during sustainable development of the phosphorus chemical industry. And the modified phosphogypsum material suitable for sea reclamation is provided.

The invention discloses a positioning riprapping method for constructing an island breakwater of an artificial island, which comprises the following steps: (1) positioning each steel pipe pile at places 15 to 17 meters away from the axial line of the island breakwater in turn at certain intervals by using a GPS positioning device, and driving the steel pipe piles into the soil at water bottom one by one; (2) simultaneously drawing a plurality of tuck net ships for transporting stones into each appointed pile site in a water area for constructing the island breakwater, wherein the prow and the stern of each tuck net ship are berthed alongside the steel pipe piles with cables, and the stern is thrown with a stern anchor to berth the tuck net ship in a riprapping area; (3) swinging the stones in cabins for multiple times by using shipborne cranes of the tuck net ships to riprap the stones at the appointed positions, and bearing off the ships from the site after riprapping the stones; and (4) drawing the next batch of the tuck net ships fully loaded with the stones into the riprapping site, and repeating the steps 1(2) to 1(3) until riprapping of the cross-section of the artificial island breakwater at that place is finished. The method adopts the steel pipe piles to replace positioning barges to greatly reduce the construction cost, improve the working efficiency, and shorten the construction period of the island breakwater of the artificial island.

The invention provides a technology of rapidly constructing a cofferdam by large mud-filled bags combined with sand-filled bags on a soft soil foundation, construction can be conducted directly on the soft soil foundation, and a road, the cofferdam and a block dam can be rapidly formed. The technology mainly includes the constructing steps that a soil engineering soft body row is laid on an original mud surface; a first layer of large sand-filled bags and a second layer of mud-filled bags are constructed sequentially, and the mud-filled bags and the sand-filled bags can be collected from the local area; sand blowing is conducted within two meters of the outer edges of the mud-filled bags, and a third layer of sand-filled bags is constructed; filled mud bag blowing and filled sand bag blowing are sequentially constructed in a cycled mode, and the sand-filled bags are located on the uppermost layer. The gradient ranging from 1: 1.5 to 1: 2 is appropriate. The technology has the advantages that consumption of natural sand materials is reduced, the filled mud can be collected from the surrounding soft soil, the surrounding soft soil is reduced, and the technology is environmentally friendly, rapid, economical and advanced.

The invention provides a rotating drum type swirl curing and stirring device which comprises a dredger, a cylindrical stirring drum and a motor, wherein a sludge storage box is arranged in the dredger, the bottom of the sludge storage box is connected with a sludge suction pipe, the end of the sludge storage box is connected with a sludge discharge pipe, the end of the sludge discharge pipe is provided with a sludge pump, and the outlet of the sludge pump is connected with a dredging pipe; a spiral sludge propeller is arranged in the cylindrical stirring drum, a bearing is arranged at the rear end of the cylindrical stirring drum, and a sludge blowing pipe is connected to the front end of the cylindrical stirring drum; the rear end of the spiral sludge propeller is in drive connection with the motor, and a feed opening is formed in the end of the sludge blowing pipe; and the upper side of the rear end of the cylindrical stirring drum is provided with a curing agent feeding pipe adjacent to the dredging pipe. The device provided by the invention is reasonable in structure, convenient to manufacture, low in manufacturing cost, convenient to disassemble and assemble, and simple in operation. A dredged sludge hydraulic reclamation method utilizing the rotating drum type swirl curing and stirring device is reasonable in step, simple in process, convenient to implement, capable of carrying out hydraulic reclamation construction while curing and stirring dredged sludge with curing agents and auxiliary materials, and capable of effectively shortening the period of the hydraulic reclamation construction.

This is a quick damming method suitable for yielding soil treatment composed by several layers of sullage and sand. At building, a layer of sullage is dumped then a layer of sand. Sand will sink into sullage by gravity to increase sullage penetrability. The procedure is repeated till reach the designed height. Put loading, like water bag, to the dam top to move out water and solidify.

The invention provides a method for constructing an artificial ecological island in wetland, which is to stack building waste and river mud or pond sludge into an island body according to the volume ratio of 2 to 3 on the basis of the prior natural island or a hard foundation in the wetland, and level and grind the island body layer by layer during the stacking; the circumference on the top of the island body is placed by stone and cement mortar, and xerophytes and hygrophytes are planted in the middle on the top of the island body; the stone and the cement mortar are used for placing vertically and horizontally frame bodies on the circumferential island slope of the surface of the island body; waste concrete bodies or gravel is filled into spaces of the frame bodies; slurry is sprayed or poured on the waste concrete bodies or the gravel, and the thickness of the slurry can cover the gravel or rubble; hygrophytes, emergent aquatic plants and submerged plants are planted on a slurry layer; and larger plants are planted before the waste concrete bodies or the gravel is filled. The method has low cost, is convenient to construct, is favorable for conserving water and soil, reduces the gradation degree of the island body, and makes a wetland ecosystem maintain stable.

A transportable wave suppressor and sediment collection (WSSC) system positionable in deep water along a coastline of a body of water, having a plurality of sections, each section further including a base portion having an upper floor portion, a forward wall, rear wall and two sidewalls and an open bottom end portion for being positioned on a floor of the body of water; at least a pair of raised elongated members positioned on the upper surface of the upper floor of the base; an upper portion to be secured to the base portion, the upper section having a angulated front wall to receive the flow of water through a plurality of flow pipes as the water engages each section; at least a pair of elongated openings in the upper portion for receiving the raised elongated members positioned on the upper surface of the upper wall of the base to define a means for securing the base to the upper portion. There is further provided a one way valving element positioned on the rear end of each flow pipe, for allowing water containing sediments to exit the pipe at the rear wall, but preventing the water and sediments from returning through the flow pipe; and a spacer portion to be positioned intermediate the base portion and upper portion, the spacer portion including a plurality of flow pipes to allow water carrying sediment to the rear of the section.

The invention discloses an engine which carries out solidifying operation on beach soil. The engine consist of a driving and power part (4), a wheel train transmission component (1), a supporting frame component (2), a lifting arm component (3) and a stirring solidifying component (5). The wheel train transmission component (1) is the key to ensure that the engine of the invention can walk on the places that can not run a land vehicle like the beaches, silt and sand land, etc; each wheel is designed into a hollow structure and a large size wheel train mode, thus being beneficial to improve the using environment of the engine of the invention; the supporting frame component (2) is jointed into a supporting body with light weight, wider transverse width and simple structure by adopting a flange beam; the lifting arm component (3) provides a force for raising up or falling down for the stirring solidifying component (5); the power source needed by the lifting arm component (3) is provided by the driving and power part (4); the stirring solidifying component (5) provides power for lifting or turning the soil; the soil turned is solidified by adding a firming agent during the turning process.

The invention provides a construction method of backfill in layers for sea reclamation, which includes the steps: selecting shipborne machines; setting a middle cofferdam; distributing pipelines and backfill pipe openings; setting drain openings; backfilling; and draining water. The construction method has the advantages that in the process of backfill in layers, muddy clay is dug and backfilled to a lower layer of a reclamation area, and high water permeability soil such as powered clay, silt, mealy sand and the like in the lower layer are dug and evenly backfilled to the upper layer of the reclamation layer to form a soil layer 1.0-1.5m in thickness; after backfilling is complete, surface ponding is organically drained, surface soil 1.0-1.5m in thickness is high in bearing capacity and forms highly durable service bedding, and good foundation is laid for subsequent construction of a soft foundation. The process of backfill in layers has evident advantages in terms of construction period, quality, cost, safety and the like, and deep dug portions are beneficial to construction of deepwater channels according to the requirement of layered soil obtaining, or the deep dug portions serve as preserved depth for sedimentation for the channels, so that subsequent maintenance cost of the channels is reduced. Therefore, the problem that human, machine and material internal operation in construction of ultra-soft foundations cannot be realized is solved.

The invention discloses a dredger fill sludge dewatering and solidification method, belonging to the hydraulic dredger fill field of hydraulic engineering. The method mainly comprises the processes of sludge suction, pumping, separation adjuvant dosing, dewatering, pre-pressing solidification and separation adjuvant dosing. The implementation of the method comprises the steps of: firstly partitioning a dredger fill area, then dissolving and diluting separation adjuvant, arranging separation adjuvant dosing points on a dredger fill sludge delivery pipe, evenly mixing the separation adjuvant under the hydraulic agitation effect of delivered sludge in the pipe, spraying the mixed sludge into the dredger fill area, avoiding artificial disturbance as much as possible, finally drain supernatant clear water of the dredger fill area and using a pre-pressing method for further dewatering and solidification to form a foundation. By adopting the method, the separation adjuvant is evenly mixed with the dredger fill sludge under the hydraulic agitation effect during pipe delivery. Through the effects of collision, coagulation, flocculation, agglomeration and the like, the grain size of the dredger fill sludge is increased, the sludge-water separation speed is accelerated, the dewatering efficiency is improved, the sludge solidification effect is promoted and the engineering benefit is improved. The method has the advantages of that the method is economic, practical and environment-friendly.

The invention provides a method for building a harbor wharf based on soft soil, which comprises the following steps of: building a plurality of caisson platforms on the ground; floating the plurality of caisson platforms and hauling to a preset position, sinking the caisson platforms, and leading the caisson platforms to be connected with each other so as to be formed into a pile platform on the sea of the harbor wharf; inserting a hollow thin-wall pile with overlarge cross section into the bottom of the sea; building a concrete platform of the harbor wharf at the tope of each caisson platform; loading heavy materials to the concrete platform of the harbor wharf; and filling the ground in a blowing way to reinforce the ground and deeply dig a harbor basin. The step of inserting the hollow thin-wall pile with the overlarge cross section into the bottom of the sea comprises the steps of filling silts and stones at the upper part of the hollow thin-wall pile or loading the heavy materials to downward sink the pile; inserting the hollow thin-wall pile into the bottom of the sea with a pile compressing device; digging the silts in the hollow thin-wall pile to downward sink the pile; and vacuumizing the upper part of the hollow thin-wall pile to downward sink the pile. The method for building the harbor wharf has high construction efficiency, low cost and good economic benefit.

An in-situ purification island structure and the construction method thereof, which refers to the field of sewage treatment technology. The in-situ purification island structure comprises the upstream purification island main body and the downstream purification island main body, in which the upstream purification island main body comprises the first base backfill layer, the first lower layer, the first hydrophobic layer, the first penetrating water layer and the first upper layer. The first ecological bags are set around the surface of the first base backfill layer. The first lower layer has center formed with a lower filling layer. The first hydrophobic layer has center formed with a hydrophobic filling layer. It has a good natural purifying effect on the sewage, saves the investment and cost, no limitation on the applications, the capacity and efficiency of the purifying is high, and saves the resource.

The invention discloses a coastal shallow wetland construction method for hard landing river routes. The method comprises the steps that a site is selected on the two sides of a hard landing river route, poles are struck on the selected site, so that the pole and the river coast form a wetland unit, rock blocks are piled on one side of the river route near the struck poles, combined fillings are laid on the inner side of the bed body of the wetland unit, wetland plants are planted on the laid combined fillings, and the coastal shallow wetland is constructed. According to the construction method, the characteristics of large amount of microorganisms, dense biofilm, strong water treatment ability and strong adaptability of the combined fillings are utilized, an optimized combination of the wetland plants is adopted, the entrapment ability of the wetland to pollutants is strengthened, the purification effect of the nitrogen and phosphorus in water is increased, so that the overall biological system operates highly efficiently to finally form a stabilized and sustainably usable system, and the river water purification ability of the system is increased.

The invention discloses a method for achieving slurry water separation and solidification of filling soil by utilizing a filling bag and a construction device, and provides the method and the device for achieving slurry water separation and solidification of filling soil by utilizing the filling bag, wherein silty soil or the mixture of silty soil and mucky soil is used as filling soil. A separating agent, a curing agent and filling soil are mixed completely through stirring, and then are filled in the filling bag; and separated water is drained out of the filling bag, and filling soil is deposited and solidified. The separating agent is a polluted water treatment agent STIR-S, and the curing agent is agglutinant STIR-Y for sewage disposal. The method leads slurry and water in a filling sand bag to be separated rapidly through rational choice and scientific ratio of the separating agent and the curing agent; water can be drained rapidly through the osmosis of a woven bag; and meanwhile, the curing agent added in filling soil can promote the soil agglomeration, can accelerate the consolidation of a soil body, can reduce the construction period by about 40 percent, and the method and the device are mainly suitable for the sand bag filling engineering for protection banks, reinforcing dams, protection slopes, dams and breakwater in harbors, river channels and the like.