138results about How to "Reduced bearing capacity requirements" patented technology

The invention provides a mutually-embedded ecological building block retaining wall and a construction method thereof, and belongs to the field of buildings. The mutually-embedded ecological building block retaining wall is formed by two or more than two layers of mutually embedded ecological building blocks which are arranged transversely side by side and stacked upwards; each of the mutually embedded ecological building blocks has a front surface of the building block and a back surface of the building block which are parallel to each other; a hole is formed in the middle part of the building block; a groove is formed on the top part of the building block; the front surface of the groove and the back surface of the groove are respectively parallel to the front surface of the building block and the back surface of the building block; a bump is arranged on the bottom part of the building block; the groove is matched with the bump in size; and the bump of the building block on the upper layer is embedded into the groove of the building block on the lower layer. The construction method comprises the following steps of: placing a building block on a construction foundation to serve as a first layer; placing a building block on the first layer building block to serve as a second layer, wherein the bump on the bottom part of the second layer building block is completely embedded into the groove of the first layer building block; and repeatedly placing the building blocks to a designed height. Grass-like vegetation and vine-like plants can be grown in openings of the building blocks and gaps among the building blocks, so that a good ecological effect is achieved.

The invention relates to a novel composite arc bridge structure, and particularly discloses a lattice-type large-span soil-filling composite corrugated steel arch bridge structure. Sandwich mortar composite corrugated steel plates are adopted as large-span main arch rings of the composite structure. The corrugated steel plates are connected to form a reversely arranged double-layer plate through bolts, studs are arranged in an interlayer, and filled high-strength mortar forms an integral sandwich composite corrugated steel plate. Corrugated steel tubes are adopted by gastropore. Load is conveyed between the main arch rings and the gastropore by filling soil. The lattice-type large-span soil-filling composite corrugated steel arch bridge structure has the advantages of being low in weight, durable, high in strength, good in flexibility, high in performance, rapid in construction, good in economic benefit and the like, is an ideal alternative to reinforced concrete bridges, can be widely used in the construction of middle-sized bridges (20-50m), and can certainly generate good social economic benefit.

The invention discloses a building method of underground structures of seacoasts and artificial islands, comprising the following steps of: (1) building continuous closed water-stopping supporting and retaining cofferdams; (2) pumping and discharging water in the area of the closed water-stopping supporting and retaining cofferdams and then carrying out reinforcement treatment or foundation construction on undisturbed submarine foundation; (3) flatly laying a foundation sand mat or a mattress layer; (4) carrying out construction of underground engineering structures of one-layer or multilayer basements; and (5) filling construction. The building method can be applied in a building technology of the underground space development of coast reclamation land areas at shallow sea areas of the coasts, and can also be applied in a building technology of underground space and tunnels on the artificial islands. For the technology applied in building the underground space structures at the reclamation land areas or the artificial islands, the demanded quantity of reclamation materials can be greatly reduced, the construction period can be greatly shortened, the engineering cost can be reduced and the construction quality and safety can be ensured.

The invention relates to a method for hoisting a large-sized component through air bags. The method is characterized in that the lower side of the component is provided with two or more than two air bags, and the air bags are charged with air or water to hoist the component. The action areas of the air bags occupy 10 to 45 percent of the bearing load areas of the component bottom. The method aims to solve the technical problems that the large-sized component adopts the conventional hoisting method of a hydraulic jack, the hoisting point load is centralized, and the prior method has the disadvantages of high base requirements, large construction difficulty, high cost, low efficiency and poor safety. The invention provides the technical method for hoisting the large-sized component through the air bags to replace the prior hoisting method of the hydraulic jack and makes use of the characteristics of large air bag bearing area and dispersed load to greatly reduce the requirements on base load force, ensure that the hoisted objects are not damaged and meet the jacking requirements of various ultra-large size components.

A ''short-range overloading vacuum prepressing---dynamic discharging consolidation combination method'' to dealing with the soft soil ground foundation, its features are : overloading prepressing the vacuum membranes of conventional vacuum prepressing method with covering water; proceeding the settlement observation to each settlement observation points according the vacuum prepressing operating rules, continuing prepressing 5~10 days after the prepressing settlement above 80% of calculate settlement, then stopping the water overloading vacuum prepressing after ensuring stable completely; removing the vacuum membrane and sun-curing 1~2 days, then proceeding the dynamic dewatering consolidation to eliminating the stored water in sand cushions which is leaved when overloading vacuum prepressing rapidly, then dynamic consolidation or roller compaction after the water level below 1.5m. Its beneficial effects are: it can eliminate the water in muck soil during a short time and enhance the consolidation degree; it makes the skin soil layer get the greatest density, meets the requirements of load bearing capacity and rigidity rapidly and prevents rebound phenomenon; it shortens the construction period and lowers the costs and applies to large area project filling soil recently which has large thickness saturated soft soil particularly.

The invention discloses a tower-drum structure suitable for ocean engineering and an installation method thereof, which are used for solving the problems of high installation and construction operation difficulty and high transportation and installation costs existing in the conventional tower-drum structure. The tower-drum structure comprises a concrete gravity foundation pedestal, a foundation tray, a guide pipe and a tower drum, wherein an injection pipe is arranged inside the guide pipe; the tower drum is sleeved on the outer side of the guide pipe; and the bottom edge of the tower drum is arranged in a tower drum collar of the concrete gravity foundation pedestal. The tower-drum structure has a simple structure, and is convenient to install; the requirement on the bearing force of a natural soft soil foundation can be met by adjusting the size of the foundation tray; and overall water haulage is adopted, so that the installation cost can be reduced effectively. The invention is particularly suitable for tower-drum structures such as sea areas with large water depths, wind generator sets and tide generator sets on soft soil foundations, and the like.

The invention provides an ultra-high-performance concrete prefabricating and splicing integration pipe gallery system which is formed by splicing a plurality of prefabricated sections. Each prefabricated section is prepared through ultra-high-performance concrete. Each prefabricated section is composed of a side plate, a bottom plate, a top plate and a partition plate. Each partition plate is fixed between the corresponding bottom plate and the corresponding top plate. The adjacent prefabricated sections are overlapped through ultra-high-performance concrete patches. The invention further discloses a construction method of the pipe gallery system. According to the integration pipe gallery system, the prefabricated sections of the integration pipe gallery system are made of materials like the ultra-high-performance concrete with high strength, high tenacity and high durability, the structure of the ultra-high-performance concrete patches and the like is combined, rigidity, bearing capacity and waterproof performance of a pipe gallery are improved, the wall thickness of the prefabricated sections is reduced compared with that of a traditional pipe gallery system, the dead weight of the pipe gallery is reduced remarkably, and transporting and hoisting are convenient. The material use amount of the pipe gallery is low to be 50% of that of the traditional pipe gallery system, the comprehensive production cost is reduced by 10-50% correspondingly, rigidity is large, the system is suitable for regions with poor foundation geologic conditions, the construction period of the pipe gallery system is short, and the influence on the construction environment is small.

The invention relates to a slope-variable spatial crossing mutually-embedded ecological building block retaining wall system and a construction method thereof. The retaining wall system comprises two main mutually-embedded ecological building blocks and two corresponding assistant ecological building blocks; each building block is consist of front and rear face plates which are provided with suspended arms and are parallel mutually and left and right rib plates which are connected with the face plates; and a central through hole is formed by the face plates and the rib plates. Through the combination of different building blocks, the retaining wall can be installed as the types of the straight surface, curved surface and different slope combinations in the construction, and the through holes formed in the wall after the construction can be used for planting the plants with different root system developed degrees. The slope-variable spatial crossing mutually-embedded ecological building block retaining wall system is capable of mutually locking by using own structure characteristics, avoiding using mediums, such as a rubber rod and a pin, improving the safety and durability of the retaining wall, and satisfying the retaining wall designs of different slopes and curved surfaces because of the combination of different building blocks in the construction. The slope-variable spatial crossing mutually-embedded ecological building block retaining wall system can be applied to the constructions of the road and river slope protection, the production is simple, and the construction is convenient.

The invention provides a method for quickly building a dyke on a coral island, and belongs to coastal engineering building construction technologies. The method comprises the steps of terrain reconnaissance, site selection and positioning, foundation treatment, dyke building, sinking and moving observation and operation maintaining. The method for quickly building the dyke on the coral island is characterized by comprising the steps that a foundation is flattened, a canal is dug for irrigation, a gate wharf is mounted in a prefabricated mode, a dyke fixing component is mounted, hydraulic reclamation and pouring are conducted, a river is dug for protecting the dyke, and plants are planted on the inner side of an outer side revetment. The method for quickly building the dyke on the coral island has the advantages of adjusting measures to local conditions, drawing on local resources, and being high in speed, good in quality and high in efficiency. Positive significance is achieved on the aspects of improving dyke quality, improving building speed, improving safety and stability of the dyke and governing the environment.

A guide pipe frame-cylindrical structure combined offshore wind turbine foundation is composed of a cylindrical foundation part and a guide pipe frame part. The cylindrical foundation part comprises a cylindrical steel wall, a concrete cover plate, a prestressed beam and a connecting beam, wherein the concrete cover plate, the prestressed beam and the connecting beam are connected into a whole in a poured mode. The guide pipe frame part comprises four steel leg columns, steel supporting pipes, connecting cylinders and flanges, wherein the steel leg columns and the connecting cylinders are welded and fixed through the steel supporting pipes respectively, the four steel leg columns are fixed to the middle of the connecting beam 4 of the concrete cover plate, and the connecting cylinders are connected with a wind turbine tower through the flanges. The guide pipe frame-cylindrical structure combined offshore wind turbine foundation has the advantages that a top plate bearing mode is adopted by the guide pipe frame-cylindrical structure of the offshore wind turbine foundation so that the resistance to the bending moment of the whole foundation can be improved remarkably, and the requirement for the bearing capacity of the foundation is lowered; the negative pressure sinking installation mode is adopted, so that the construction speed is high; the whole structure is overall prefabricated and assembled on a shore, floatingly-transported on the sea and installed in a negative pressure sinking mode on the sea, as a result, construction is convenient, efficiency is high, and cost is low.

The invention provides a multipoint fastening and reinforcing method for a concrete silo structure. The method comprises the steps: firstly, arranging a vertical unequal-sided angle steel on the external wall of a silo at intervals of certain spacing, and equidistantly planting chemical anchor bolts along the vertical directions of the angle steels so as to anchor the angle steels on the wall of the silo, wherein long sides of the angle steels are tightly attached to the surface of the external wall of the silo; then, arranging a steel plate strip, which horizontally encircles the silo, at intervals of certain spacing along the vertical direction of the silo; forming a bolt hole in each part, directly facing to the corresponding long side of each corresponding angle steel, of each corresponding steel plate strip; enabling bolts to penetrate through the bolt holes in the steel plate strips from outside to inside, and arranging a puller nut at the part, located between the corresponding steel plate strip and the corresponding angle steel, of each bolt; screwing the bolts so as to enable the front ends of the bolts to be abutted against the long sides of the angle steels, and meanwhile, outwards turning the puller nuts so as to enable the puller nuts to be outwardly abutted against the steel plate strips and apply certain prestress to the steel plate strips; then, hanging a reinforcing mesh; finally, building a sliding formwork, and pouring a layer of reinforced concrete outside the wall of the silo.

The invention discloses an assembly-type ecological net face geogrid pulling-opposite-type supporting structure. The supporting structure is a stratified structure and composed of rebar net face units, a geogrid, a biology cushion layer, geotechnical cloth, terrace filled earth and the like. The rebar net face of the supporting structure is assembled by a plurality of rebar net face units. Geogrid reinforced ribs are fixed on the rebar net face units and return package filled earth. The biology cushion layer, geotechnical cloth and the like are laid on the inner side of the rebar net face units and used for vegetation growth. The geogrid is in communication with long ribbing inside the terrace cross section and connected with a pulling-opposite structure formed by the rebar net faces on two sides of the terrace edge slope. The assembly-type ecological net face geogrid pulling-opposite-type supporting structure has the advantages of being reasonable in stress, good in overall stability, low in construction cost, wide in application range, convenient to construct, environment-friendly in ecology and the like.