37results about How to "Improve horizontal carrying capacity" patented technology

The invention discloses an offshore wind power foundation structure consisting of a single pile, cylindrical foundations and an anchor cable. The offshore wind power foundation structure consists of a single pile, multiple cylindrical foundations and an anchor cable, wherein the cylindrical foundations are uniformly distributed on the circumference which takes the single pile as the center of a circle; the anchor cable is obliquely tensioned and is connected with the cylindrical foundations and the single pile; the anchor cable, the cylindrical foundations and the single pile are connected through welding; the included angle between the anchor cable and the single pile is between 30 and 60 degrees; and the top of the single pile is connected with a wind turbine tower through a flange plate. According to the technical scheme, a novel foundation type consisting of the single pile, the cylindrical foundations and the anchor cable is given, the anchor cable is connected with the cylindrical foundations and the single pile and is obliquely tensioned, the resistance of shallow soil on the earth surface is fully exerted, the bending moment resistance of the structure is enhanced, and the displacement of the pile body is reduced, so that the aim of reducing the diameter and thickness of the single pile is fulfilled.

The invention discloses an offshore wind electricity single pile-wing plate-rockfill composite foundation and a construction method thereof. The foundation comprises a single pile, a wing plate and rockfill, the wing plate is of a conical structure, and is welded to the outer wall of a pile body, the rockfill is formed through dense stacking of the rockfill, the upper end of the wing plate is located in the rockfill, and the lower end of a pile wing is located on a seabed supporting layer. The construction method of the offshore wind electricity single pile-wing plate-rockfill composite foundation comprises the following steps of S1, determining the sizes of the single pile, the wing plate and the rockfill; S2, driving the single pile with the wing plate by the designed anchorage depth; and S3, stacking the rockfill on a seabed nearby the single pile. The problems of the low single pile bearing force, the large pile wing of the wing plate pile, serious foundation washing and the like can be solved, the single pile, wing plate and rockfill combination structure uses pile periphery soil resistance and rockfill friction force, the pile foundation bearing force can be improved, the pile foundation horizontal displacement can be reduced, the wing plate size is reduced, a wing plate stress mechanism is changed, washing of waves and ocean currents to seabed soil can be blocked, and safe and stable running of an offshore wind generation set can be ensured.

The invention provides an offshore wind power multi-pile bearing platform composite foundation. The offshore wind power multi-pile bearing platform composite foundation comprises a bucket foundation and multiple steel pipe piles. The bucket foundation comprises an upper-layer bucket body with an opening in the upper portion and a lower-layer bucket body with an opening in the lower portion. The upper-layer bucket body and the lower-layer bucket body are separated by a separation plate. Multiple connecting sleeve parts are arranged on the separation plate. Each steel pipe pile sequentially penetrates the corresponding connecting sleeve part and the separation plate to be inserted into a seabed. The steel pipe piles and the connecting sleeve parts are in grouting connection. Concrete is poured into the upper-layer bucket body. A tower tube connecting segment is further arranged in the upper-layer bucket body. The invention further provides a construction method based on the offshore wind power multi-pile bearing platform composite foundation. The offshore wind power multi-pile bearing platform composite foundation is simple in structure and novel in design and is provided with the upper-layer bucket body with the opening in the upper portion and the lower-layer bucket body with the opening in the lower portion. The concrete is arranged in the upper-layer bucket body to serve as a bearing platform, the lower-layer bucket body is sunk below the seabed, corners on the foundation soil face are reduced, and the horizontal bearing performance of the foundation is further improved.

The invention discloses a super large diameter, hollow, independent and composite pile foundation and a construction method thereof. The composite pile foundation comprises a super large diameter thin wall reinforced concrete hollow pile, cement mixing piles, a pile end reinforced concrete thick plate and a pile surrounding grouted soil body, wherein the cement mixing piles surround the pile foundation to form a closed cement mixing pile wall; the super large diameter thin wall reinforced concrete hollow pile is made through section cast-in-place at the pile site or sectional splicing after prefabricating, and after the hollow pile body sinks to a designed position, the bottom end is sealed by concrete so as to form the hollow pile; after the formation of the hollow pile, high pressure jet grouting of cement grout is carried out at the part between the super large diameter thin wall reinforced concrete hollow pile and the cement mixing piles; and the pressure-injection of cement grout is further carried out at the bottom and the surrounding soil body of the hollow pile for reinforcement through pile bottom grouting pipes, horizontal grouting holes and vertical grouting holes, so as to form the composite pile foundation. According to the super large diameter, hollow, independent and composite pile foundation and the construction method thereof, a higher bearing capacity is achieved, the advantages of good pile quality and high safety are achieved, and meanwhile a better economic performance is achieved.

The invention belongs to single pile foundation at sea with cement mixing pile reinforced foundations of the field of pile foundation of ocean engineering. According to the technical scheme, a steel pipe pile is sunk into soft soil foundations of a seabed, in the soft soil foundations, the reinforce foundations formed by a underwater deep-layer cement mixing method are arranged around the steel pipe pile, and the reinforced foundations is a rotary body coaxial with the steel pipe pile; and the reinforced foundations comprise cement mixing pipes and soft soil between the cement mixing pipes. According to the single pile foundation, the horizontal bearing capacity is high, horizontal displacement of a pile top is small, an inclination angle of a pile body is small, rigidity of foundation islarge, and the single pile foundation is applied to the characteristic of large horizontal load of an offshore wind turbine, the strict requirements of the offshore wind turbine to the foundation horizontal displacement and the inclination angle of the pile body are met, and the requirement of overall natural vibration frequency of 'structure and foundation' is met.

The invention provides a single-pile foundation of an offshore wind power vibroflotation cemented pile reinforced soft soil foundation and a construction method. The single-pile foundation comprises a single pile and vibroflotation cemented piles, wherein the vibroflotation cemented piles are arranged around the single pile; the vibroflotation cemented piles are formed in a seabed soft soil layer and a supporting layer through a construction method of combining a deep sea gravel pile vibroflotation pile forming process and an underwater self-compacting cement-based cementing material self-flow grouting process; the vibroflotation cemented piles and soil bodies among the piles form a vibroflotation cemented pile composite foundation; and the pile body strength of the vibroflotation cemented piles in the composite foundation is sequentially increased from an outer ring to an inner ring and is sequentially decreased from the upper part to the lower part. The vibroflotation cemented piles effectively improve the bearing capacity of the soft soil layer, the applicability of the single-pile foundation in a shallow covering layer seabed and an offshore deep water wind power plant is expanded, meanwhile, a scouring structure does not need to be additionally arranged, and the single-pile foundation has the characteristics of being low in foundation manufacturing cost and construction cost, high in construction efficiency and easy and convenient to operate.

The invention relates to an offshore wind power combination foundation. The offshore wind power combination foundation includes a guiding pipe frame, steel pipe piles, suction cylinders, and steel cables. The offshore wind power combination foundation is composed of the guiding pipe frame, the steel pipe piles, the suction cylinders, and the steel cables; the guiding pipe frame and the suction cylinders are connected by the steel cables, the steel cables can exert their high and strong tensile strength, the lateral rigidity of the combined foundation is increased, the guiding pipe frame bearsa vertical load, a fan horizontal load and a wave current force borne by the guiding pipe frame are transmitted to the suction cylinders through the steel cables for sharing, since the suction cylinders are dispersed and embedded into surface layer soil and have a large contact area with a surface layer soil foundation, horizontal force resistance of surface soil can be fully exerted, the horizontal bearing performance of a foundation pile can be improved, the basic anti-overturning capability is improved, the drawing force of main legs of the guiding pipe frame is reduced, thereby reducing the distance between the main legs of the guiding pipe frame and the cross section of a rod piece, and the basic cost and construction difficulty are reduced. The suction cylinders can employ negative pressure sinking, and the construction difficulty is small.

The invention discloses an offshore wind power foundation consisting of a single pile and cylindrical foundations. The cylindrical foundations are uniformly distributed on the circumference which takes the single pile as the center of a circle; the single pile is a steel pipe pile; the cylindrical foundations and the cylindrical foundations and the single pile are connected through connecting steel pipes through welding; and the top of the single pile is connected with a wind turbine tower through a flange plate. According to the technical scheme, a novel foundation type consisting of the single pile and the cylindrical foundations through the connecting steel pipe is given, the resistance of shallow soil on the earth surface is fully exerted through the cylindrical foundations and the connecting steel pipe, the bending moment resistance of the single pile structure is enhanced, and the displacement of the pile body is reduced, so that the aim of reducing the diameter and thickness of the single pile is fulfilled.

The invention relates to an offshore single pile foundation with a compacted grouting reinforcement foundation in the pile foundation field of ocean engineering. According to the technical scheme, a steel pipe pile is sunk to a seabed, the seabed is a soft soil foundation, in the soft soil foundation, a reinforced foundation with compacted grouting technology is arranged on the periphery of the steel pipe pile, and the reinforced foundation includes a compacted grouting bubble, a drainage channel and soft soil between the compacted grouting bubble and the drainage channel; and the reinforced foundation is a rotating body coaxial with the steel pipe pile. The offshore single pile foundation has high horizontal bearing capacity, small pile top horizontal displacement, small pile body inclination and large foundation stiffness, adapts to the characteristics of large horizontal load of an offshore wind turbine, meets the strict requirements of the offshore wind turbine on foundation horizontal displacement and pile body inclination, and meets the requirements of 'structure + foundation' integral natural vibration frequency.

The invention relates to a basalt fiber reinforced cement-soil mixing pile and a construction method thereof. The mixed grout material of the cement-soil mixing pile has the following components in parts by mass: 0.4 of basalt fiber, 15 of cement, 7.5 of water, and 0.02 of muddy soil. The construction process of reinforced and mixed piles is as follows: first, the basalt fiber and the silty soil on site are mixed according to the mass ratio of 20:1, and the drum mixer is used for dry mixing; after the mixing is uniform, the cement slurry with a water-cement ratio of 0.5 is used to use a drum mixer Mix and mix to form basalt fiber cement mixed slurry; finally pour the mixed slurry into the collecting hopper of the deep layer mixer, and then carry out the construction of the mixing pile according to the normal deep layer mixing pile construction process. After reinforcement, the tensile and shear strength of the cement-soil material is greatly improved, thereby improving the horizontal stiffness and horizontal bearing capacity of the cement-soil mixing pile, making the new mixing pile not only anti-seepage and water-stop, but also horizontally bearing and anti-deformation.

The invention discloses an offshore single pile foundation with a high pressure jet grouting pile reinforced foundation, and belongs to the field of pile foundations of ocean engineering. According tothe technical scheme, the offshore single pile foundation includes a steel pipe pile sunk into a seabed soft soil foundation, in the soft soil foundation, the reinforced foundation formed by a high pressure jet grouting method is arranged on the periphery of the steel pipe pile, and the reinforced foundation is a rotating body coaxial with the steel pipe pile; the reinforced foundation includes high pressure jet grouting piles and soft soil between the high pressure jet grouting piles; the inner ring high pressure jet grouting piles in the reinforced foundation are arranged to form an inner ring high pressure jet grouting pile wall body; and the inner ring high pressure jet grouting pile wall body is in contact with a pile body of the steel pipe pile. According to the offshore single pilefoundation, the horizontal bearing capacity is high, the horizontal displacement of the pile top is small, the pile body inclination is small, the foundation stiffness is large, the offshore single pile foundation adapts to the characteristics of large horizontal load of an offshore wind turbine, the strict requirements of the offshore wind turbine on foundation horizontal displacement and pile body inclination are met, and the requirements of the 'structure and foundation' integral natural vibration frequency are met.

The invention discloses a device for improving ancient building brick column stability and a bearing capacity determining method thereof. An ancient building comprises a brick column and a wood beam at the tops of the brick columns, and the device for improving the ancient building brick column stability comprises U-shaped clamps, inhaul cables, anchoring parts and pin shafts; one or more inhaul cables are arranged on each of the two sides of the brick column, one end of each inhaul cable is hinged to the corresponding anchoring part located below the inner side of the wood beam through the corresponding pin shaft, and the other end of each inhaul cable is wound around the top of the brick column and is placed in the corresponding U-shaped clamp on the wood beam, and after pretension forceis applied to the inhaul cables, the other ends of the inhaul cables are fixedly hinged to the anchoring parts located below the outer side of the wood beam; the anchoring parts are fixed to a structure irrelevant to the ancient building; and the U-shaped clamps are arranged at the top of the wood beam, and the pretension force is applied to the U-shaped clamps by virtue of the inhaul cables to generate pressure so that the U-shaped clamps cling to the wood beam. According to the device, an original ancient building brick column structure is not damaged, meanwhile, the horizontal bearing capacity of the original structure can be improved, and the principle of minimum intervention and reversibility of cultural relic building repairing protection is achieved.

The invention discloses a pushing device and a method for improving the horizontal load-carrying performance of a low bearing platform by the pushing device, and belongs to the technical field of bridge engineering. Through the pushing device, a soil body of the side wall of the low bearing platform can be squeezed, dense gravel concrete is refilled, the defects that a high horizontal resistance effect cannot be provided due to the fact that a foundation soil body of the side wall of the low bearing platform is loose and cannot be in close contact with the side wall of the bearing platform areovercome, then the purpose of significantly improving the horizontal load-carrying performance of the low bearing platform is achieved, and the goal of improving the safety stock of pile group foundations of the low bearing platform is realized. According to the pushing device, resetting is carried out by a reset device after the soil body is compressed, main parts can be taken out of from clamping slot, so that recycling is realized, and the application cost of the pushing device is significantly reduced. The pushing device and the method provide additional safety stock for large-scale low bearing platform pile group foundations of important projects, considering of the role of the low bearing platform in the designing process of the group pile foundations is possible, and an important role is played on high horizontal design and safety applications of the large-scale pile group foundations in national bridge engineering.

The invention relates to a construction device of a cast-in-place concrete pipe pile and a construction method of a formed pile. The construction device comprises a drilling tool reducing device, a plurality of standard drilling tools and a bottom drilling tool, wherein on the drilling tool reducing device, a main conveying pipe in an outer pipe is connected with one end of two secondary conveyingpipes so as to form a Y-shaped structure, the interiors communicate with each other, and the other ends of the two secondary conveying pipes protrude from the outer pipe and are symmetrically and fixedly arranged at the outer edge of a lower flange; on the standard drilling tools, two concrete filling pipes I are symmetrically fixed to the outer wall of a core pipe I; on the bottom drilling tool,two concrete filling pipes II are symmetrically fixed to the outer wall of a core pipe II, and door blocking devices which can be opened and closed are respectively arranged on the lower ends of thetwo concrete filling pipes II; the drilling tool reducing device, the plurality of standard drilling tools and the bottom drilling tool are connected in sequence; and the main conveying pipe, the secondary conveying pipes, the concrete filling pipes I and the concrete filling pipes II are connected together and communicate with each other. The construction device has the advantages of low construction cost, high pile bearing capability, high construction controllability, good quality and wide geologic adaptation.

The invention belongs to the technical field of industrial architecture, power plant construction and bridge and tunnel engineering, and relates to a skirt separation plate underground diaphragm wall-pile combined foundation; and the skirt separation plate underground diaphragm wall-pile combined foundation mainly consists of a main underground diaphragm wall, inner vertical separation plates, bearing platform plates, a skirt underground diaphragm wall, outer vertical separation plates and piles. The main underground diaphragm wall and the skirt underground diaphragm wall form a zigzag structure; the skirt underground diaphragm wall sleeves the upper part of the main underground diaphragm wall; multiple inner vertical separation plates form two symmetrical triangular space in the main underground diaphragm wall; multiple piles are uniformly distributed in the main underground diaphragm wall; the skirt underground diaphragm wall, the main underground diaphragm wall and the piles are connected as an overall structure through the bearing platform plates; through a synergistic effect of the three, the overall rigidity of the combined foundation is improved; and the outer vertical separation plates are used for connecting the internal of the skirt underground diaphragm wall with the main underground diaphragm wall. The combined foundation is reasonable in stress of the overall structure, saves the construction cost, is wide in application range, and can be applied to the field of industrial architecture, power plant construction, wind power generation and bridge and tunnel engineering.

The invention relates to an offshore wind power truss concrete cylindrical foundation. The offshore wind power truss concrete cylindrical foundation comprises a polygonal cylinder wall which is formed by splicing a plurality of steel truss concrete combined cylinder wall modules of the same structure, the steel truss concrete combined cylinder wall module comprises module inner wrapping steel, module outer wrapping steel, vertical stiffening ribs, transverse stiffening ribs, inclined stiffening ribs and opposite-pull supports, concrete is filled between the module inner wrapping steel and the module outer wrapping steel, the inclined stiffening ribs are connected with the vertical stiffening ribs and the transverse stiffening ribs, and the opposite-pull supports are connected with the module inner wrapping steel and the module outer wrapping steel. The cylinder wall is of a concrete steel-clad structure, the cylinder wall cannot be bent in the negative pressure sinking process, the stability is good when the cylinder wall is in place, and the defects that the steel cylinder wall of a traditional cylindrical foundation is prone to being bent, and the stress of a connecting joint of the cylinder wall and a subdivision steel plate is large are overcome.