40results about How to "Reduce anchor length" patented technology

The present invention relates to an adhesive anchoring unit and an anchoring method for anchoring fiber reinforcement plastic bar or cable, an end cover is arranged at one end of the anchoring unit and a sleeve with a locating hole is arranged at the other end of the anchoring unit. An internal cone chamber is arranged in the sleeve, and a nut is arranged surrounding the sleeve provided with a mortar filling hole and a ventilation hole. The fiber reinforcement plastic bar or cable passes through the locating hole and one end in the internal cone chamber was cut into two halves, which are inserted with a wedge to become a wedge form. A starting section of the half of one end of the bar or cable is coated with a retaining ring and the section passing through the locating hole is coated with a thin wall aluminum sleeve tube and active powder concrete is filled in the internal cone chamber of the sleeve. The method is described as follows: after the bar or cable shaft passes through the sleeve of the anchoring unit, a pretension is required on the sleeve, and the active powder concrete is added into the sleeve. The present invention improves anchoring performances of the adhesive media and the FRP bar, therefore, the anchoring length is reduced, the structure is simple, the use is convenient, the present invention is safe and reliable, the cost is low and the PRC manufacturing and maintenance is easy.

The invention discloses a connecting node of an assembled whole thick prefabricated slab. Connecting steel bars are reserved on the connecting surface of a prefabricated slab unit in the mode, the exposed parts of the connecting steel bars are ' '-shaped, and the exposed parts and the connecting surface form a closed polygon. In the connecting mode for the prefabricated slab unit and a beam or a wall, the connecting steel bars of the prefabricated slab unit are inserted with steel bars configured for the beam or the wall together at the connecting positions in a penetrating mode. Viewing from the cross section of the whole connecting node, the connecting steel bars and the steel bars configured for the beam or the wall form a single closed stirrup or a composite stirrup, and longitudinal bolt steel bars penetrate into the inner corner position of the single closed stirrup or the composite stirrup. The connecting node of the whole thick prefabricated slab unit can achieve the equivalent performance as a prefabricated slab connecting nodes and a cast-in-place concrete structure while achieving higher prefabrication rate and assembly rate. The invention further provides the whole thick prefabricated slab unit for achieving the connecting mode.

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 relates to the technical field of highway bridge construction engineering. The invention discloses a pipe pier and bearing platform connecting structure; socket holes are formed in the upper end of a cast-in-place bearing platform; the lower section of the prefabricated pipe pier is an embedded section which is inserted into the socket hole; a steel end plate fixedly connected with alongitudinal main rib of the prefabricated pipe pier is arranged on the lower end surface of the prefabricated pipe pier; the prefabricated pipe pier is a hollow cylindrical pipe pier, the steel endplate is an annular end plate identical to the end face of the prefabricated pipe pier in shape, pipe pier outer side connecting concrete is poured between the lower end face of the embedded section and the bottom face of the socket holes and between the outer side wall of the embedded section and the inner wall of the socket holes, and a pipe pier inner side core filling concrete is poured into ahollow hole of the embedded section. The invention further discloses a construction method of the pipe pier and bearing platform connecting structure. According to the pipe pier and bearing platformconnecting structure and the construction method, the embedded section of the prefabricated pipe pier is provided with the steel end plate, so that the anchoring length of steel bars in concrete is reduced, the pre-embedded depth and the thickness of the bottom plate of the bearing platform can be reduced, and the overall thickness of the bearing platform is reduced.

The invention discloses a conical pipe anchor bar connection structure for a prefabricated assembly structure, and belongs to the field of prefabricated assembly engineering. The connection structurecomprises a conical pipe, a grouting guide pipe and a fixing circular ring. The conical pipe is of a pre-embedded structure, the conical pipe can achieve a restraint effect on steel bars and groutingmaterials in the conical pipe, and meanwhile the tension capacity of the conical pipe in concrete can be improved. Frame vertical ribs and tie bars in a prefabricated bearing table also achieve a restraint effect on cracking of the bearing table or foundation concrete caused during pulling of the conical pipe. In prefabricated components, a conical pipe group is connected with the surrounding frame vertical ribs and the tie bars, and therefore the anchor performance of the conical pipe group can be improved. The steel bar anchorage length needed by the conical pipe anchor bar connection structure is small, the conical pipe anchor bar connection structure can be used for connection between a reinforced concrete structure prefabricated assembly component and a foundation or the bearing table, and rapid building of the prefabricated assembly reinforced concrete is achieved.

The invention discloses a variable-clamping-force corrugated clamping plate anchor for an FRP sheet, and relates to an anchor for an engineering structure in the field of high-strength composite materials. The variable-clamping-force corrugated clamping plate anchor for the FRP sheet includes an upper corrugated clamping plate, a lower corrugated clamping plate, bolts, nuts, washers and the FRP sheet. The FRP sheet passes through the upper corrugated clamping and the lower corrugated clamping plate, the upper corrugated clamping plate and the lower corrugated clamping plate clamp the FRP sheettightly, the washers are arranged at bolt holes of the upper corrugated clamping plate and the lower corrugated clamping plate, the nuts penetrate through the upper corrugated clamping plate and thelower corrugated clamping plate, and the FRP sheet is anchored by tightening the nuts. The anchor adopts the corrugated clamping plates to replace flat clamping plates to clamp the FRP sheet, and theanchoring bolt radius gradually increases from an outlet to the end part of the anchor, the clamping force provided by the anchoring bolts further gradually increases from the outlet to the end part of the anchor, the stress peak at the outlet of the anchor can be effectively reduced, the anchoring efficiency is improved, the anchoring length is shortened, materials are saved, and economy is improved.

The invention relates to the field of civil engineering and environment and resource utilization. The bundled half-grouting constraint pulp anchor connecting method is suitable for connection of steelbars in fabricated buildings, in particular to steel bar connection in a prefabricated concrete column of bundled reinforcement. According to a bundled reinforcement prefabricated concrete column, bundles of bars are arranged at four corners of the column to replace a plurality of steel bars arranged at the circumference of the column. More than three steel bars are arranged at each edge of the reinforced concrete column, and therefore at least eight steel bars are needed. Pulp anchor connection can not be adopted due to size limitation. Sleeve connection is adopted, and at least eight steelbars are required. According to connection of bundled reinforcement prefabricated concrete upper and lower columns, the bundled half-grouting constraint pulp anchor connecting method is adopted. According to the method, the bundles of bars reserved by the bundled reinforcement prefabricated concrete lower column are inserted into reserved holes of the upper column, a high-strength grouting material is poured, and connection between the bundled reinforcement concrete upper column and lower column is achieved. Through connection, internal forces generated by vertical and horizontal loads on thecolumn can be effectively transferred, and the number of connections and anchoring length of vertical steel bars are reduced.

The invention relates to an anti-skid tunnel structure and a construction method thereof. The anti-skid tunnel structure comprises a tunnel structure passing through a slip mass, wherein multiple upper connecting beams and lower connecting beams are respectively arranged on an arch apex and an inverted arch of the tunnel structure; multiple upper-side anti-skid piles and lower-side anti-skid pilesare respectively arranged on two sides of the tunnel structure; and the upper connecting beams and the lower connecting beams are fixedly connected with the upper-side anti-skid piles and the lower-side anti-skid piles. The construction method comprises the steps of (1) excavating a pile well at a pile position of a predetermined anti-skid pile, and constructing an anti-skid pile retaining wall;(2) pouring concrete on the anti-skid pile to the design height; (3) excavating a tunnel and constructing preliminary bracing; (4) implanting first connecting reinforcement steel bars onto the anti-skid piles, binding connecting beam reinforcement steel bars on the first connecting reinforcement steel bars, binding secondary lining inner reinforcement steel bars, arranging second connecting reinforcement steel bars along a trend direction of the tunnel structure, and connecting the connecting beam reinforcement steel bars and the secondary lining inner reinforcement steel bars through the second connecting reinforcement steel bars; and (5) pouring a secondary lining, the upper connecting beams and the lower connecting beams through a vertical formwork.

The invention relates to the field of fabricated buildings, and particularly relates to a steel bar connection grouting-free sleeve device of a fabricated concrete structure. The steel bar connection grouting-free sleeve device comprises a boss, a sleeve and a high-strength bolt; the sleeve is provided with a sealing ring and a clamping groove; the high-strength bolt is provided with a nut, a screw, a plum head, a threaded protection arm and a high-strength steel pipe; the boss and the sleeve are made of low-yield-point steel; the high-strength bolt is made of high-strength steel; and the boss is in a crescent shape. The sleeve is extruded and formed through the high-strength bolt, the positive pressure of the contact face is increased by applying pre-tightening force of primary screwing and final screwing to the high-strength bolt, and accordingly steel bars are tightly attached to the boss to be fixed. Filling is not needed in the construction process, and compared with an existing grouting sleeve, the steel bar connection grouting-free sleeve device can avoid the phenomenon of material waste in the grouting process and meanwhile has the beneficial effects that labor force is reduced, the construction efficiency is improved, and the construction difficulty is lowered.

The invention provides a coil forming tool and a multi-disc soil anchor prepared by the coil forming tool. The coil forming tool includes an inner liner pipe arranged at the innermost layer of the coil forming tool to support the coil forming tool; an air bag It is sleeved on the outer layer of the inner liner, has elasticity, and stretches radially along the inner liner; the pressure plate is arranged on the outer surface of the airbag, and the pressure plate is provided with a bump, and the pressure plate The airbag radially expands and contracts along the inner liner pipe and moves radially. A multi-disc soil anchor comprises a cylinder and a plurality of discs with spaced rings provided on the outer surface of the cylinder. The disk forming tool provided by the present invention uses the air bag to inflate the pressure plate to radially expand, press the bump on the surface of the pressure plate into the drilled soil, and form multiple disk cavities through multiple operations such as inflation and deflation, rotation and stretching, etc. Then pour cement slurry into the expanded borehole, and when the cement slurry solidifies into discs, the soil facing surface of each disc is subjected to the pressure of the passive soil, and finally a higher anchoring force can be obtained.

The invention discloses an FRP steel strand composite bar anchorage device and an anchoring method. The anchorage device comprises a soft metal pipe, an opening device, an anchor cup and a grouting material, the anchor cup penetrates into an anchoring area of an FRP steel strand composite bar, the soft metal pipe is fixed to the front end of the anchoring area of the FRP steel strand composite bar, the rear end of the anchoring area is opened through an opening device, the tail end of the anchor cup is filled with the grouting material after being blocked, and anchoring is completed after high-temperature curing. The anchorage device is simple in structure, small in size, high in anchoring efficiency, convenient to construct, capable of effectively improving the anchoring performance of the grouting material and a composite rib material and reducing the anchoring length, clear in stress direction, convenient to use, low in cost and high in reliability.

The invention discloses a fabricated concrete structure beam-column dry-wet combination connection structure and an implementation method, and belongs to the technical field of fabricated buildings. Acylindrical cavity structure is arranged at the intersection of a transverse beam and a longitudinal beam, the cylindrical cavity structure comprises an outer cylinder and an inner cylinder, and a square ring-shaped cavity is formed by enclosing the outer cylinder and the inner cylinder; column corner part longitudinal reinforcement bars I and column corner part longitudinal reinforcement bars IIare arranged at four corners of the square ring-shaped cavity, transverse beam longitudinal reinforcement bars and longitudinal beam longitudinal reinforcement bars in the transverse beam and the longitudinal beam penetrate through the outer cylinder and the inner cylinder in sequence; and anchoring heads are connected to the inner ends of the transverse beam longitudinal reinforcement bars and the longitudinal beam longitudinal reinforcement bars. According to the fabricated concrete structure beam-column dry-wet combination connection structure and the implementation method, a modular beam-column joint core area connection structure is formed through the construction method of the inner cylinder and outer cylinders, the problems of multi-directional reinforcement bar anchoring connection of a beam body, complex intersection anchoring connection of column body longitudinal reinforcement bars of and stirrups crossing and installation are solved, the process link and construction costof a formwork and a support are saved, and the fabricated concrete structure beam-column dry-wet combination connection structure has the advantages and characteristics of modularization, integration,integration and informatization.

The invention relates to an anchor rod combined anti-floating system. The anchor rod combined anti-floating system comprises a plurality of main anti-floating anchor rod assemblies, and the adjacent main anti-floating anchor rod assemblies are connected through channel steel purlines; and each main anti-floating anchor rod assembly comprises a drill hole, an anchor rod body, a polygonal base plate, a conventional base plate and a plurality of I-shaped cushion blocks, wherein an anchor rod hole is formed in the middle of the polygonal base plate and the middle of the conventional base plate, the anchor rod body is arranged in the anchor rod hole in a penetrating mode, and the I-shaped cushion blocks are assembled between the polygonal base plate and the conventional base plate. The anchor rod combined anti-floating system is simple in structure and ingenious in design, has the characteristics of being low in construction cost, good in structural reliability, high in adaptability and the like, and has good construction convenience.

The invention relates to a prefabricated wall high-strength concrete connecting joint and a construction method. The connecting joint comprises at least two prefabricated wall bodies, wherein each prefabricated wall body comprises a high-strength concrete wall body, a wall top embedded part is pre-embedded in the top of each high-strength concrete wall body, a connecting box and a wall bottom embedded part are pre-embedded in the bottom of each high-strength concrete wall body, the wall top embedded part is provided with an elevation adjusting part matched with each wall bottom embedded part, the adjacent prefabricated wall bodies are connected through a connecting part, and the connecting boxes are filled with high-strength grouting materials used for connecting the adjacent prefabricated wall bodies into a whole. Compared with the prior art, the method has the advantages of simplicity and high efficiency in construction, visual quality inspection and the like.

The invention particularly relates to a construction method for improving the anti-pulling performance of a twisted steel anchor rod. The problems that when an existing construction method of the twisted steel anchor rod is applied, the length of an anchoring section exceeds the actual requirement by a large amount, resources are wasted, and labor and time are wasted are solved. The construction method for improving the anti-pulling performance of the twisted steel anchor rod comprises the following steps that S1, a plurality of vertical rib column grooves are vertically formed in the wall ofsurrounding rock; S2, a plurality of anchor rod holes are drilled in the bottom wall of each vertical rib column groove; S3, a plurality of anti-pulling resistance blocks are installed on the anchoring section of each twisted steel anchor rod; S4, the twisted steel anchor rods are placed into the anchor rod holes, and cement mortar is poured into the anchor rod holes; S5, steel bars of vertical rib columns and panels are bound, formwork erecting is conducted, and concrete is poured; and S6, the ends of the twisted steel anchor rods are sealed and anchored on the outer sides of the panels. Theconstruction cost is reduced, the construction progress is accelerated, and the method can be suitable for stone excavation high slope stability protection engineering and can be applied and popularized in similar engineering.

The invention belongs to the field of structural connection of fabricated buildings, particularly relates to a PC structure grouting sleeve connection construction method, and aims to solve the technical problems that the field connection quality is difficult to meet the design requirement due to less research on the existing field connection construction process of the fabricated building structure and lack of strict field construction quality control regulations and specifications. According to the scheme, one end of grouting sleeve connection is connected through sleeve grouting, when a component is hoisted, a ribbed steel bar reserved in a base layer needs to be inserted into a reserved sleeve of a PC component, then the position of the steel bar is adjusted through the modes of perpendicularity, elevation, positioning and the like, the component is temporarily fixed, after the strength of a grouting material meets the requirement, grouting material mixtures are injected through grouting holes, grouting is stopped when grout flows out of the grout outlets, and the grouting holes and the grout outlets are blocked. The basic materials of the grouting materials are cement, and the grouting materials also comprise an additive, fine aggregate and other materials, and a proper amount of water is added and stirred.

The invention relates to a bolt forming tool and a multiple-transverse-bolt soil anchor prepared with the bolt forming tool. The bolt forming tool which is simple in structure and easy to realize is adopted for forming a plurality of bolt bodies on the surface of the soil anchor. The purpose is that the feature that the multi-transverse bolt earth facing face bears the action of passive earth pressure is adopted, the area of multi-transverse bolt accumulative earth facing faces is larger, and therefore higher anchoring force is obtained; in addition, the cement paste increment is small when bolts are increased, and the bolt forming tool is economic and applicable. In order to achieve the aim, the technical scheme is that the bolt forming tool comprises a hollow cylindrical metal tube, an engine, a speed reducer, a rotating shaft, a bevel gear, a chain wheel, a support base, a rising stroke limit switch, a descending stroke limit switch, a screw with a round nut, a metal block with internal threads and a fixing plate. The multiple-transverse-bolt soil anchor prepared by the bolt forming tool comprises a cylinder formed in the manner that a plurality of bolt cavities and boreholes are solidified by pouring cement slurry or cement mortar, multiple bolt bodies are located on the outer surface of the cylinder, a whole body is formed together with the cylinder, the bolt bodies are semi bolts, and the bolt cross section shape is semicircular.

The invention discloses a cement-based composite material, a preparation method thereof and a floating slab. The cement-based composite material comprises a base material, wherein the base material comprises Portland cement, silica fume, mineral powder, fly ash, quartz sand, water and a water reducing agent; a shape memory alloy; and a synthetic fiber. The cement-based composite material can improve the strength and toughness of joint areas among a plurality of plates forming the floating slab and greatly reduce the connecting length, so that the long floating slab can be applied to rail traffic engineering, the problems of an existing floating slab rail structure are solved, and the durability and comfort of the floating slab are greatly improved.