433 results about "Prestressed concrete" patented technology

The invention discloses a chlorine salt corrosion resistant prestressed concrete solid square pile and a construction method thereof, a cementing material of a pile body concrete body of the square pile comprises a mineral admixture accounting for 50%-70% of the total mass of the cementing material, and the cementing material adopts Portland cement; sacrificial anode blocks electrically connected with the main reinforcements are embedded in the pile body concrete body. The pile body concrete body is doped with a composite corrosion-resistant and rust-resistant agent; the outer surface of the pile body concrete body is coated with polyurea waterproof paint or epoxy seal primer. An electromigration type corrosion inhibitor and a microcapsule containing bacillus are doped into the pile body concrete body; the prestressed main reinforcements are steel reinforcements with anti-corrosion coatings; and fiber bragg grating sensors are pre-embedded around the prestressed main reinforcements. The mixing proportion of the concrete body of the pile body is specially designed for fixing and blocking chloride ions, an inapplicable sulfate-resistant cement scheme is abandoned, and the chlorine salt resistance is improved from the source of materials.

The invention relates to the technical field of bridge load tests, and provides a bridge load test crack increment change observation method and system, and the method comprises the steps: collecting prestressing tendon circumferential strain distribution data and dual-wavelength strain response data; calculating an interface bonding stiffness change parameter; pre-stress modulation effect compensation and polar coordinate system conversion are carried out on the strain response data and the rigidity change parameters, and micro-crack characteristic signals are obtained; load data and beam group arrangement parameters are collected, and a micro-crack propagation prediction model is established in combination with the interface bonding stiffness change parameters; inputting the micro-crack characteristic signal into a micro-crack propagation prediction model, and outputting a micro-crack development trend prediction result; and adjusting sampling parameters of a dual-wavelength time division multiplexing algorithm and characteristic extraction parameters of prestress modulation effect compensation according to a micro-crack development trend prediction result. According to the invention, the precision of observing the increment change of the micro-crack in the bridge load test is improved, and the automatic monitoring and prediction of the micro-crack of the prestressed concrete bridge are realized.

The invention discloses a bridge damage assessment method based on acceleration spectrum analysis after an axle impact event. According to the method, based on long-term vibration monitoring data of the bridge and real-time data during axle collision, the maximum impact force borne by the bridge during collision is calculated, the maximum impact force calculated through the two methods is compared, the fitting degree is analyzed, and therefore a bridge damage state evaluation model is constructed, and basic bridge damage evaluation indexes are established; and the damage degree of the impacted bridge can be quickly evaluated in real time. By establishing the bridge damage state evaluation model, the real-time damage condition of the prestressed concrete bridge can be evaluated, and the damage degree of the bridge after being impacted can be quickly judged.

The invention relates to a railway girder and truss integrated bridge shed and a construction method thereof. The railway girder and truss integrated bridge shed comprises low-height prestressed concrete box girders, truss web members, truss upper chords and cast-in-place reinforced concrete plates. The truss upper chord members are positioned on two transverse sides above the low-height prestressed concrete box girder and are longitudinally arranged; the truss web members are arranged on the two transverse sides of the low-height prestressed concrete box girder and are longitudinally inclined, the tops of the truss web members are fixedly connected to the truss upper chord members, and the bottoms of the truss web members are fixedly connected to the low-height prestressed concrete box girder; a cast-in-place reinforced concrete plate is arranged on the top of the truss upper chord, and the bottom of the cast-in-place reinforced concrete plate is poured into the truss upper chord, namely concrete is poured into the truss upper chord. The truss structure and the box girder are effectively connected, so that the truss not only bears the supporting effect of the protective component, but also forms a stress whole with the main girder, the defect that additional load of a traditional shed tunnel acts on the main girder is overcome, and the overall rigidity, stability and durability of the structure are remarkably improved.

The present invention relates to rebar-free prestressed concrete and to a forming method therefor. The rebar-free prestressed concrete comprises: a base layer which is a mortar, concrete or neat slurr

According to the concrete prefabricated part laying equipment and method, the problems that an existing laying method is long in tower crane occupation time, high in safety risk, low in working efficiency and low in hoisting equipment adaptability are solved. The laying equipment comprises a universal bearing base, a walking hoisting device and a control unit, the top of each connecting plate of a mounting platform of the universal bearing base is connected with a ball assembly, the bottom of each connecting plate is connected with a pushing mechanism, a plurality of steel balls are evenly distributed in a semi-spherical inner groove of a bearing piece, and universal balls are arranged in the inner groove and make contact with the steel balls; a pushing rod of the pushing mechanism penetrates through the connecting plate and abuts against the bearing piece. The method comprises the steps that the universal bearing base is placed on a temporary shelving platform which is laid in advance, the prestressed concrete laminated slab is hoisted and placed above the universal bearing base, a winch of the walking hoisting equipment hoists the prestressed concrete laminated slab and accurately clamps the prestressed concrete laminated slab into a preset position, and the steps are repeated; and sequentially laying the prestressed concrete laminated slabs outside the temporary shelving platform area.

The application provides a rotatable pull rod installed on the top of an I-beam template, belonging to the field of prestressed concrete bridges, which comprises a fixed bottom plate, a movable bottom plate arranged on one side of the fixed bottom plate, a telescopic mechanism connecting the movable bottom plate and the fixed bottom plate, a positioning clamping block fixedly connected to the bottom of the fixed bottom plate and the movable bottom plate, and a U-shaped frame fixedly connected to the side end of the fixed bottom plate and the movable bottom plate. The pushing of the driving spring is offset by the driving pawl, and the driving pawl is unlocked. Under the pushing of the reset coil spring, the rotating shaft is rotated, the rotating shaft drives the driving pawl to rotate, the driving pawl is reset, and the two driving pawls are reset one by one, so that the fixing of the device and the two I-beam templates is conveniently released, the device is quickly disassembled, the device is quickly assembled and disassembled, the installation mode between the butterfly buckle and the screw rod is avoided, the installation speed is improved, and the flow operation of the beam bench is accelerated.

The application relates to the technical field of building structures, in particular to a prestressed concrete structure performance monitoring method and system, which comprises the following steps: acquiring application environment parameters and performance monitoring data; determining external load tensile stress and external environment parameters according to the application environment parameters; determining stress loss data according to the performance monitoring data; respectively arranging the external load tensile stress, the external environment parameters and the stress loss data according to time nodes to obtain a concrete performance graph; collecting real-time application parameters and simulated performance data of the prestressed concrete structure in a current time period, and analyzing the real-time application parameters and the simulated performance data according to the concrete performance graph to obtain real-time performance monitoring data; and judging whether the real-time performance monitoring data is abnormal, if yes, generating performance warning information and sending the performance warning information to a target terminal. The application improves the performance monitoring accuracy of the prestressed concrete structure.

The utility model relates to the field of prestressed ribbed laminated slab, concretely provides a kind of prestressed concrete ribbed laminated slab, including splicing subassembly and hoisting subassembly, the hoisting subassembly is installed on splicing subassembly, the splicing subassembly includes laminated slab body, and the inside of laminated slab body is equipped with multiple groups of connecting tendon, the left side surface of connecting tendon is fixed with connecting block one, and the side surface of connecting block one is fixed with multiple groups of trapezoidal block one.The utility model is positioned splicing between laminated slab body by setting the trapezoidal block one and trapezoidal block two of mutual adaptation, the through-hole formed on its surface forms longitudinal through channel, so that building reinforcement can be sequentially arranged in the through-hole of adjacent laminated slab, directly strengthen the overall bearing capacity between trapezoidal block, indirectly improve the structural stability of laminated slab combination, and the corner block fixed on the surface of connecting block one and connecting block two is automatically attached to the corner area of laminated slab body with assembly action, to form physical protection barrier.

The present application relates to offshore wind power generation technology field, especially to a kind of semi-submersible floating wind turbine foundation, system and design method.Semi-submersible floating wind turbine foundation includes: intermediate pontoon and at least three edge pontoon arranged around intermediate pontoon, the bottom of edge pontoon is poured with base, and prestressed concrete box girder is connected between adjacent edge pontoon.The semi-submersible floating wind turbine foundation provided by the present application can be used to bear offshore wind turbine, by adopting the form of pontoon and box girder combination, the effective displacement of wind turbine foundation can be greatly improved, so that wind turbine foundation has greater carrying capacity;Box girder adopts prestressed concrete box girder, can be used by the higher structural strength, stiffness and excellent crack resistance, durability of prestressed concrete box girder, under the condition of meeting the load demand and stability requirement of offshore wind turbine, save part of reinforcement and concrete cost, it is favorable to improve the overall economic benefit of offshore wind turbine engineering, so that offshore wind turbine can be large-scale commercial use.

The utility model discloses a large-diameter prestressed concrete water delivery pipe, which comprises a steel socket ring at one end and a steel socket ring at the other end, and further comprises a UHPC (Ultra High Performance Concrete) inner pipe and a common reinforced concrete outer pipe, the steel spigot ring and the steel socket ring are fixed with the UHPC inner pipe and the common reinforced concrete outer pipe; a spiral prestressed tendon is wound on the outer circumference of the UHPC inner pipe, and the two ends of the spiral prestressed tendon are anchored in the water conveying pipe; a sealing ring for sealing with the inner circumferential surface of the steel socket ring is arranged on the outer circumference of the steel socket ring; annular grooves used for containing the sealing rings are formed in the two end faces of the common reinforced concrete outer pipe. And the two end surfaces of the UHPC inner pipe are also provided with respective annular grooves for accommodating the sealing rings. The water pipe can omit a steel cylinder, has the characteristics of high strength and compactness, high wear resistance, high impermeability, super corrosion resistance and durability of ultra-high performance concrete, and is relatively low in cost, relatively simple in structure, relatively short in production period and relatively high in production efficiency.

The utility model discloses a kind of assembled prestressed concrete column anti-splitting reinforcement devices, including concrete column main body, the concrete column main body is connected with reinforcing part, the reinforcing part includes: a plurality of prefabricated concrete boards, with concrete column main body surface adhesion;Several reinforcing strips, respectively inserted between concrete column main body and a plurality of prefabricated concrete boards, the utility model relates to concrete column anti-splitting reinforcement technical field.The assembled prestressed concrete column anti-splitting reinforcement device, let protective frame cooperate with spring, anti-drop strip, precast concrete board is resisted in concrete column main body surface and plays certain prestress treatment effect, precast concrete board cooperates with reinforcing strip and protective frame, and it plays reinforcing and anti-splitting effect to concrete column main body, and first mounting seat, second mounting seat, first bolt nut assembly, second bolt nut assembly, anti-drop component cooperate with each other, and support structure is installed on the outer side edge of protective frame.

1. Name of the product in this design: Ribbed planar steel truss prestressed concrete composite slab. 2. Purpose of this design: For use in building structures. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

This utility model relates to the field of civil engineering pile technology, and discloses a high-strength and durable prestressed concrete pipe pile for green building, including an outer cylinder. Multiple first reinforcing bars are fixedly connected inside the outer cylinder. An end cap is fixedly connected to one end of the outer cylinder, and a fixing member is fixedly connected to the other end. A cone is provided at the bottom of the fixing member, and a rotating ring is rotatably connected inside the fixing member. Multiple connecting members are fixedly connected to the bottom of the rotating ring. Multiple third fixing holes are opened on the surface of the fixing member, and a load-bearing component is provided inside the outer cylinder. In this utility model, by assembling the multiple first fixing holes with the fixing member, and then rotating the rotating ring to drive the connecting members to rotate, the rotating ring is engaged inside the connecting block. At this time, the connecting block, connecting members, and fixing member are fixed together by screws, thereby enabling rapid splicing and fixing of the outer cylinder and the bottom cone.

The utility model belongs to the technical field of steel pile tips, and particularly relates to a grouting type steel pile tip structure for a prestressed concrete hollow pile, which comprises a steel pile head arranged at the bottom of a hollow pile body, a butt joint square head matched with a square hole at the bottom of the hollow pile body is arranged at the top of the steel pile head, and fixed connection is realized through a threaded hole and a fastening bolt; the steel pile head is hollow, a mounting groove is formed in the conical surface, a swing rod is rotationally mounted in the mounting groove, a ground breaking conical surface is arranged on the surface of the swing rod, an arc plate extends from the top of the swing rod, and the arc plate is tightly attached to the sealing arc surface in the mounting groove to prevent muddy water from entering the steel pile head. The swing rod is unfolded and contracted through a control block and a connecting rod, the control block adjusts the height through a threaded rod, and a knob is arranged at the top of the threaded rod for operation. The pointed conical head is screwed at the bottom of the steel pile head, and the soil breaking efficiency is improved through the synergistic effect of the pointed conical head and the soil breaking conical surface.

The invention provides a prestressed concrete pipe pile pouring device, and belongs to the field of prestressed concrete pipe piles, the prestressed concrete pipe pile pouring device comprises a main upper mold and a main lower mold, the main lower mold is fixedly connected below the main upper mold, and one end of the main upper mold and one end of the main lower mold are fixedly connected with the same end cover; and the extension assembly comprises a secondary upper die and a secondary lower die which are arranged on the same side of the main upper die and the main lower die respectively, and guide ring seats are arranged on the main upper die, the main lower die, the secondary upper die and the secondary lower die and are distributed in an array mode in the axis direction. By means of the extending assembly, when different pipe piles with the same diameter are formed, the main mold can be adopted as a main body, and the additional number of secondary molds are additionally arranged according to the additionally-increased pipe pile length on the basis of the main mold, so that the forming requirements of prestressed concrete pipe piles with different lengths are met; the types of required molds are greatly reduced, and the manufacturing cost is reduced.

This invention discloses a ribbed prestressed concrete composite floor slab and its design method, relating to the field of prefabricated building structure design technology. The method includes calculating the total bearing capacity of prestressed steel bars required in the primary load-bearing direction and the total bearing capacity of ordinary steel bars required in the secondary load-bearing direction, based on the span and load parameters of the target floor slab. The reserved extension lengths of the two types of steel bars are determined according to the precast portion and the total thickness of the composite. The types, spacing, tensile stresses, and precise curve trajectory coordinates of the prestressed steel bars within the precast concrete are designed in detail, and the types, spacing, and arrangement coordinates of the ordinary steel bars are also designed. An internal reinforcement space model of the precast portion is generated based on the coordinate parameters of all steel bars, and a three-dimensional structural model of the ribbed precast template is generated by combining the geometric boundaries. This method achieves refined reinforcement design and digital expression of manufacturing information.

[Problem] To improve the efficiency of assembly work by saving labor required for tensioning and anchoring work of PC steel material in a method of constructing a concrete floating body. [Solution] PC steel materials 19 are sorted in advance into a group of PC steel rods 20 to be used for temporarily assembling precast cylindrical bodies in order, and a group of PC steel strands 23 to be used for introducing predetermined tension after completing temporary assembly of a concrete floating body. In a temporary assembly step of a concrete floating body 4A, the temporary assembly of the concrete floating body 4A is completed by assembling all precast cylindrical bodies 15 while introducing tension to the PC steel rods 20 and anchoring the group of PC rods 20, each time the precast cylindrical bodies 15 are connected sequentially, and installing a floating body bottom part 29 on the endmost part. In a tension introduction step, the PC steel strands 23 are inserted in the longitudinal direction over the entire length of the concrete floating body 4A, and introduction of tension to the PC steel strands 23 and anchoring are performed for the group of PC steel strands 23.

This application relates to a complete set of equipment for bidirectional prestressed concrete and a production method using the complete set of equipment, belonging to the field of prestressed pipe pile preparation technology. The bidirectional prestressed concrete equipment includes a hollow mold, a tensioning mechanism, and a centrifugal mechanism. A reinforcing cage and a tensioning plate are inserted into the mold. The tensioning plate is detachably connected to the end wall of the reinforcing cage. The tensioning mechanism drives the tensioning plate to move along the axis of the reinforcing cage, and the centrifugal mechanism drives the mold to rotate around the central axis of the reinforcing cage. It also includes a clamping element. A variable sealing gasket is inserted in the gap between the tensioning plate and the mold. The sealing gasket is arranged circumferentially along the tensioning plate, and the clamping element controls the deformation of the sealing gasket so that the sealing gasket simultaneously presses against the inner wall of the mold and the peripheral wall of the tensioning plate. This application optimizes the sealing effect of the sealing gasket on the gap between the tensioning plate and the mold, reducing the leakage of concrete from the gap.

The invention relates to an optimization method for temporary consolidation of a hybrid beam cable-stayed bridge. The optimization method comprises the following steps that S1, support design and stress analysis of a side span prestressed concrete main beam cast-in-place section are determined; construction stage division of a side span prestressed concrete main beam cast-in-place section is determined; bridge site environment parameters are determined; determining action effect parameters corresponding to the bridge site environment parameters; s2, determining the overall arrangement of the temporary consolidation support; s3, calculating the equivalent spring stiffness of the main beam support system; s4, establishing a girder-support cooperative calculation finite element model; s5, calculating the design shearing force of the pier beam temporary consolidation support; s6, structural design of a pier beam temporary consolidation support is conducted; s7, unbalanced horizontal force generated by tensioning of the stay cable is calculated; s8, calculating the design shearing force of the temporary consolidation support of the tower beam; and S9, structural design of the temporary consolidation support of the tower beam is carried out. According to the method, various load effects borne by the temporary consolidation support can be accurately calculated.

The application discloses a kind of preparation and stacking method of steel rib prestressed concrete composite slab, belong to the field of prefabricated building, the present application is provided with support block on steel rib, support block includes concrete block, upper support leg and lower support leg are embedded in concrete block, upper support leg and lower support leg are respectively cast in concrete upper flange and prestressed concrete bottom plate, and the top end surface of upper support leg and the bottom end surface of lower support leg are flush with the top surface of concrete upper flange and the bottom surface of prestressed concrete bottom plate respectively.The support block provided by the present application has the effect of limiting the position of steel rib, preventing the inclination deformation of steel rib and the upper flange of concrete, and can also be used as a stacking support device for steel rib prestressed concrete composite slab.The present application has high production efficiency, simple structure, convenient installation and positioning, can effectively limit the displacement of steel rib, improve the stability of steel rib, prevent the inclination deformation of steel rib and the upper flange of concrete, optimize the stress of stacking, and is safe and reliable for stacking, to prevent the concrete from being crushed.

The utility model discloses a PCCP (prestressed concrete cylinder pipe) connecting structure which comprises pipe bodies, the two ends of each pipe body are respectively provided with an inserting part and a socket part, the inserting parts and the socket parts on the two pipe bodies which correspond to each other end to end are inserted and correspond to each other, sealing rings are arranged on the outer sides of the inserting parts, and sealing rings are arranged on the outer sides of the socket parts. Fixing parts and pressing parts corresponding to the fixing parts are arranged at the two ends of each pipe body respectively, the number of the pressing parts is multiple, and the pressing parts are detachably connected with the fixing parts on the adjacent pipe bodies. The pipeline connecting structure has the beneficial effects that the fixing pieces and the pressing pieces at the two ends of the pipe body are combined, the multiple pressing pieces enable two sections of pipelines to be stably connected in a detachable connection mode, pressure can be gradually applied in the later use process, and the tightness and long-term sealing of pipeline connection are guaranteed.

According to the method for testing the effective prestress of the existing concrete structure considering the reverse friction influence, a plurality of prestressed tendons are pre-buried in concrete to form an in-service prestressed concrete member, and one prestressed tendon at the end part of the concrete is stretched by using a supplementary tensioning tool; in the stretching process, the obtained stretching stress of the prestressed tendon, the corresponding stretching length measured from the failure of friction constraint between an anchorage device and a wedge-shaped clamping piece of the prestressed tendon and the effective stress of the in-service prestressed concrete member are recorded for at least five times, and the obtained stretching stress and the corresponding stretching length are the secondary reverse friction force influence stress; selecting the friction coefficient of local deviation of the length per meter in the pore channel and the friction coefficient between the prestressed tendon and the wall of the pore channel from the anti-friction influence length corresponding to the anti-friction influence stress; finding out an optimal one; and calculating the effective stress of the out-service prestressed concrete member by using any recorded tensile length.

The invention discloses PCCP pipe manufacturing equipment based on a fixed pedestal method and a forming method, and relates to the technical field of PCCP pipe production equipment.The equipment comprises an operation platform, a first circulation component, a second circulation component, a third circulation component, a demolding component, a pouring component and a hoisting component; the plurality of working platforms are arranged in a foundation pit in the working area; the first circulation component is arranged on one side of the top of the operation area. The second circulation component and the third circulation component are arranged on the other side of the top of the operation area; the pouring part is used for pouring concrete into the mold main body assembled in the operation holes to form PCCP pipes, and the PCCP pipes are cured in the corresponding operation holes; the method comprises the steps of operation preparation, mold closing operation, pouring operation, maintenance operation and mold removal operation. According to the equipment, the problems that in traditional production and manufacturing, the occupied space is large, and the structure is complex are solved, the requirement for the height of a plant is relatively low, and a PCCP core pipe finished product stable in product quality can be formed through pouring with the method.

The invention discloses a bidirectional prestressed concrete prefabricated slab. The bidirectional prestressed concrete prefabricated slab comprises a plurality of first steel bars, a plurality of second steel bars, a plurality of trusses and a plurality of third steel bars. The first steel bars are arranged at intervals in the first direction of the concrete prefabricated slab, the second steel bars are arranged at intervals in the second direction of the concrete prefabricated slab, and the first steel bars and the second steel bars are suitable for being stretched and penetrate through the concrete prefabricated slab; the third steel bars are arranged at intervals in the first direction, the third steel bars are embedded in the concrete prefabricated slab, the third steel bars are opposite to the same second steel bar and are connected and matched with the same second steel bar, the central axes of the third steel bars are perpendicular to the central axis of the second steel bar, and when the second steel bar is stretched, the second steel bar stretches the third steel bars. Under the condition that the number of the first steel bars is not additionally increased, the transverse prestress is synergistically enhanced, and the use safety of the concrete prefabricated slab is improved.

The invention relates to the technical field of concrete pouring molds, in particular to a quick-release prestressed concrete square pile one-time forming mold which comprises a bottom plate, first forming mechanisms which are symmetrically arranged are detachably connected to the two ends of the bottom plate, second forming mechanisms are symmetrically arranged at the upper end of the bottom plate, and a supporting mechanism is arranged on one side of each second forming mechanism. The second forming mechanism comprises a second side plate and elastic rotating shafts arranged at the two ends of the bottom of the second side plate and rotationally connected with the bottom plate, and unlocking parts are arranged on the sides, away from the second side plate, of the elastic rotating shafts. Detachable connection between the first forming mechanism and the bottom plate is achieved through a clamping block, a clamping groove and a first buckling piece, and then rotation adjustment and quick disassembly of the second forming mechanism are achieved through cooperation of an elastic rotating shaft, a first spring, an unlocking piece and an abutting rod; and then the first mounting piece and the second mounting piece are matched with the second buckling piece to achieve detachable mounting of the supporting mechanism.

This invention relates to a simulation test method for grouting of prestressed concrete bridge ducts, characterized by the following specific test steps: S1: Test design; S2: Equipment and material preparation; S3: Test commencement. This method addresses the problem that common duct grouting construction techniques, processes, and requirements cannot meet the needs of new grouting materials and equipment, such as "grouting from the lowest point." Some construction techniques have theoretical flaws, such as "flushing the duct before grouting and blowing away accumulated water with high-pressure air," and some lack reliable theoretical and practical basis. Therefore, it is necessary to study the influencing factors of duct grouting construction techniques based on current grouting materials, summarize the main factors affecting duct grouting quality, and propose an operable grouting process method.

The utility model provides an LNG full-capacity prestressed concrete storage tank outer tank lining plate embedded part anti-deformation auxiliary tool which comprises a bent rod, the middle of the bent rod is bent, cross rods are fixedly connected to the end and the middle of the bent rod in the same direction, a nut is fixedly connected to the cross rod located at the end, a screw is in threaded connection with the middle of the nut, and a nut is fixedly connected to the middle of the screw. One end of the screw rod is fixedly connected with a clamping plate, the tool further comprises a wrench, the wrench comprises a plate body, one end of the plate body is provided with a bayonet, and the bayonet is matched with the clamping plate. The device is simple in structure, easy to manufacture on a construction site and beneficial to alignment welding of the embedded parts.

The invention relates to an upper part tension prestress concrete filled steel tubular column-foundation structure and a construction method. The structure comprises a steel strand, a concrete filled steel tubular column, a first flange, a steel strand anchor plate, a second flange, a flange high-strength bolt, a seven-hole anchorage device, a steel column, a hand hole cover plate, a third flange, a foundation anchor bolt and a foundation; a steel strand is anchored on a steel strand anchor plate through a seven-hole anchorage device, the steel strand anchor plate is connected with a first flange and a second flange through flange high-strength bolts, the second flange is connected with a steel column, the steel column is connected with a foundation through a third flange and a foundation anchor bolt, and the steel strand is tensioned and anchored above the ground. The hand hole cover plate is fixed on the outer side of the hand hole of the steel column; a center hole is formed in the steel strand anchor plate and used for allowing the steel strand and the seven-hole anchorage device to penetrate through, and a limiting groove is formed in the bottom face of the steel strand anchor plate and used for clamping and fixing the seven-hole anchorage device. Compared with the prior art, the method has the advantages of being small in steel consumption, excellent in fatigue resistance, convenient to construct, easy to maintain, high in adaptability and the like.

The utility model relates to the related technical field of prestressed concrete, in particular to a prestressed concrete pipe pile production auxiliary device which comprises a bottom plate. An auxiliary box is fixedly connected to the top of the bottom plate, and a pipe pile mold body is arranged at the top of the auxiliary box. Under the matching action of the bottom plate, the auxiliary box, the pipe pile mold body, the auxiliary rod, the moving block, the stroke groove and the self-locking mechanism, pipe pile molds with different diameters can be rapidly supported, the pipe pile molds are prevented from being deformed when concrete is distributed and poured, the operation process is simplified, the working efficiency is improved, and the labor intensity of workers is reduced. The problems that when an existing prestressed concrete pipe pile production auxiliary device supports pipe pile molds with different diameters, due to the fact that the radian of an arc-shaped plate cannot be adjusted, the arc-shaped plate needs to be replaced according to the radian of the surface of the pipe pile mold, the operation process is complex, and the working efficiency is low are solved.