CN116872353A - Device and process for rapidly forming pretensioned prestressing I-beam - Google Patents
Device and process for rapidly forming pretensioned prestressing I-beam Download PDFInfo
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- CN116872353A CN116872353A CN202311126928.XA CN202311126928A CN116872353A CN 116872353 A CN116872353 A CN 116872353A CN 202311126928 A CN202311126928 A CN 202311126928A CN 116872353 A CN116872353 A CN 116872353A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 210000002435 tendon Anatomy 0.000 claims abstract description 102
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 239000004744 fabric Substances 0.000 claims description 47
- 239000004567 concrete Substances 0.000 claims description 45
- 238000003860 storage Methods 0.000 claims description 32
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 22
- 230000002457 bidirectional effect Effects 0.000 claims description 14
- 238000005096 rolling process Methods 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 description 18
- 239000011248 coating agent Substances 0.000 description 14
- 238000000576 coating method Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000011513 prestressed concrete Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000009739 binding Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/043—Wire anchoring or tensioning means for the reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/388—Treating surfaces of moulds, cores, or mandrels to prevent sticking with liquid material, e.g. lubricating
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/02—Bridges characterised by the cross-section of their bearing spanning structure of the I-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention belongs to the technical field of bridges, in particular to a device and a process for rapidly forming a pretensioned prestressed I-beam, which aims at the problems of different tensioning forces, complex operation and low beam forming efficiency of a plurality of prestressed steel strands in the prior art, and provides the following scheme that: the two fixing pedestals are poured on the foundation, the two ends of the fixing pedestals are respectively provided with a fixing cross beam, one sides, close to each other, of the two fixing cross beams are fixedly connected with one ends of the two fixing pedestals, the two fixing pedestals and the fixing cross beams form a beam forming groove, a plurality of lower prestressed tendons, middle prestressed tendons and upper prestressed tendons sequentially penetrate through the beam forming groove from top to bottom.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a device and a process for rapidly forming a pretensioned prestressing I-beam.
Background
The span of girder type bridges is rapidly increased when prestressed concrete bridges are developed. In current bridges around the world, more than 70% of bridges are prestressed structures. The status of prestressed concrete technology in bridges has been very important. Prestressed concrete is a method for relieving the inherent shortage of tensile resistance of concrete. The method can be used for manufacturing beams, floors and bridges with large span which are difficult to build by conventional reinforced concrete. Prestressed concrete uses steel cords (typically high tension cords or rods) to provide compressive forces at both ends to resist and counteract the tension forces in the concrete portion created by the bending moment.
Some of the deficiencies in the prior art remain in the I-Liang Chengliang process:
in the prior art, when the prestressed steel strands are stretched, most of the prestressed steel strands are stretched at the same time, so that the stretching forces of the prestressed steel strands are different, and the quality of the later I-shaped Liang Chengliang is affected;
when preparing I-beam among the prior art, the operation is comparatively loaded down with trivial details, and beam forming inefficiency.
Aiming at the problems, the invention provides a device and a process for rapidly forming a pretensioned prestressing I-beam.
Disclosure of Invention
The invention provides a device and a process for rapidly forming a pretensioned prestressed I-beam, which solve the defects of different tensioning forces, complex operation and low beam forming efficiency of a plurality of prestressed steel strands in the prior art.
The invention provides the following technical scheme:
a pretensioned prestressing i-beam rapid beam forming apparatus comprising: the two fixing pedestals are poured on the foundation, the two ends of the two fixing pedestals are respectively provided with a fixing cross beam, one sides, close to each other, of the two fixing cross beams are fixedly connected with one ends of the two fixing pedestals, the two fixing pedestals and the fixing cross beams form a beam forming groove, a plurality of lower prestressed tendons, middle prestressed tendons and upper prestressed tendons sequentially penetrate through the beam forming groove from top to bottom, two I-shaped plug templates are arranged in the beam forming groove, and the lower prestressed tendons, the middle prestressed tendons and the upper prestressed tendons penetrate through the I-shaped plug templates;
two movable templates are connected in a sliding manner in the beam forming groove;
the tensioning structure is arranged on one side of one of the fixed cross beams and is used for tensioning the lower prestressed tendons, the middle prestressed tendons and the upper prestressed tendons;
the oiling structure is arranged at the top of the movable template and is used for oiling the movable template;
and the maintenance structure is arranged on one side of one of the fixing pedestals and is used for maintaining the I-beam in the beam forming groove.
In one possible design, the tension structure comprises a plurality of jacks fixedly connected to one side of one fixed beam, the output shafts of the jacks are fixedly connected with the same movable beam, the lower prestressed tendons, the middle prestressed tendons and the upper prestressed tendons penetrate through the movable beam, the outer walls of the lower prestressed tendons, the middle prestressed tendons and the upper prestressed tendons are respectively connected with a first anchor, a second anchor and a third anchor in a threaded manner, the second anchor is in contact with one of the fixed beams, the third anchor is in contact with one side of the movable beam away from the fixed beam, and the first anchor is in contact with one side of the other fixed beam away from the movable beam; the movable cross beam is pushed by the jack, and the movable cross beam stretches one of the lower prestressed tendons through the cooperation of the first anchorage device and the third anchorage device, so that the lower prestressed tendons reach stretching force, when stretching is finished, the second anchorage device on one of the lower prestressed tendons is screwed, the second anchorage device is contacted with the fixed cross beam, and then the plurality of lower prestressed tendons, the middle prestressed tendons and the upper prestressed tendons are stretched one by one in a reciprocating mode, so that the construction efficiency is high, the safety is high, and the stretching force is the same.
In one possible design, the oiling structure comprises a screw rod which is rotationally connected to the top of the movable template through a base, the top of the movable template is slidably connected with an oiling plate, the oiling plate is sleeved on the outer wall of the screw rod in a threaded manner, a cavity is arranged in the oiling plate, one side of the oiling plate, which is far away from the I-shaped plug template, is provided with a plurality of oil storage holes for oiling the movable template, one side of the oiling plate is provided with an oiling cloth matched with the oil storage holes, one side of the movable template, which is far away from the I-shaped plug template, is fixedly connected with an oil storage tank, the top of the oil storage tank is provided with an oil conveying pipe, and the oil conveying pipe is communicated with the cavity; the oil pump in the oil storage tank is pumped into the cavity, the oil is immersed in the wet coating rag from top to bottom through the oil storage hole, the motor is started to drive the screw to rotate, the screw drives the coating plate to move, and the coating plate and the coating cloth can coat the moving template with oil.
In one possible design, the maintenance structure comprises a rotating shaft which is rotationally connected to one side of one fixing pedestal through a base, a rolling roller is fixedly sleeved on the outer wall of the rotating shaft, two first torsion springs are sleeved on the outer wall of the rotating shaft, one ends of the two first torsion springs, which are close to each other, are fixedly connected with two ends of the rolling roller respectively, the other ends of the first torsion springs are fixedly connected with the base, heat-insulating cloth is wound on the outer wall of the rolling roller, arc-shaped rods are fixedly connected to the tops of two fixing cross beams, sliding sleeves are sleeved on the outer walls of the two arc-shaped rods, a same cross rod is fixedly connected between the two sliding sleeves, and the cross rod is fixedly connected with one end of the heat-insulating cloth; the heat-insulating cloth is pulled towards the clamping hook direction through the cross rod, and moves along the track of the arc-shaped rod, so that the heat-insulating cloth covers the beam forming grooves, diffusion of steam is avoided, and the temperature of the beam is kept at 21-80 ℃.
In one possible design, the maintenance structure further comprises a plurality of steam pipes, wherein the two fixed cross beams are fixedly connected with one side, close to each other, of the fixed cross beams, a plurality of air outlets are formed in one side, close to the I-shaped plug template, of each steam pipe, and the steam pipes are communicated with the steam boiler through air pipelines; the steam boiler injects high-temperature steam into the steam pipe, the steam is injected into the beam forming groove through the air outlet, and the heat preservation cloth covers the beam forming groove, so that the temperature of the beam can be kept at 21-80 ℃.
In one possible design, two sides of the fixed bases, which are close to each other, are provided with a yielding groove for yielding to the oil storage tank, and one side of the other fixed base is provided with a plurality of recording thermometers.
In one possible design, a plurality of clamping hooks are arranged at the top of the fixing pedestal far away from the thermal insulation cloth, a plurality of clamping rings are arranged at one side of the cross rod, and the clamping rings are buckled with the clamping hooks; the heat preservation cloth can be completely covered into a beam groove through the matching of the clamping ring and the clamping hook.
In one possible design, two bidirectional screw rods are rotationally connected in the beam forming groove, one ends of the two bidirectional screw rods penetrate through the two movable templates in a threaded manner, the two movable templates are respectively positioned on the front and back threaded sections of the bidirectional screw rods, one ends of the two bidirectional screw rods extend to the outer side of the beam forming groove and are fixedly connected with synchronous wheels, and the two synchronous wheels are in transmission connection through a synchronous belt; the two bidirectional screw rods rotate simultaneously, the two movable templates are close to each other until the two movable templates are attached to the I-shaped plug template, an I-shaped beam pouring groove can be formed through the matching of the two movable templates and the I-shaped plug template, concrete can be poured through the concrete carrier vehicle at the later stage conveniently, and the pouring speed of the I-shaped beam is increased.
In one possible design, a rectangular groove is formed in the top of the fixing pedestal far away from the heat insulation cloth, a rotating rod is rotationally connected in the rectangular groove, two fixing plates are fixedly sleeved on the outer wall of the rotating rod, two second torsion springs are sleeved on the outer wall of the rotating rod, one ends of the two second torsion springs, which are close to each other, are fixedly connected with the fixing plates respectively, the other ends of the second torsion springs are fixedly connected with one side inner wall of the rectangular groove, a plurality of round sleeves and rolling wheels are fixedly sleeved on the outer wall of the rotating rod, the bottom ends of the clamping hooks are fixedly connected with the top of the round sleeves, a plurality of pull ropes are arranged on one side of the movable template, the other ends of the pull ropes extend into the rectangular groove and are fixedly connected with the rolling wheels, a plurality of stop blocks are fixedly connected with the bottom inner wall of the rectangular groove, and the stop blocks limit the clamping hooks; when the movable template moves towards the middle, when the movable template is contacted with the I-shaped plug template, the movable template pulls the rotating rod by 90 degrees through the pull rope, the clamping hook is in a vertical state, the stop dog blocks the clamping hook, after the I-shaped beam is formed, the movable template resets, the rotating rod reversely rotates by 90 degrees under the torsion action of the second torsion spring, the clamping hook can be further enabled to lie flat in the rectangular groove, at the moment, the clamping hook can be released from the clamping buckle between the clamping ring, the heat-insulating cloth is rewound by the rotating shaft and the winding roller under the torsion action of the first torsion spring, and then the I-shaped beam is taken out through the sling.
A pretensioned prestressing I-shaped Liang Kuai girder forming process comprises the following steps:
s1, pre-tensioning method prestress beam field construction:
s11, number of beam making pedestals: in order to meet the production needs and actual conditions, 2 rows of pedestals are designed, each row of pedestals can simultaneously produce 3 beams, the production speed of 3 beams/day can be achieved, the production speed of 6 beams/day can be achieved in the peak period, and the construction period requirement is completely met;
s12, arrangement of beam fields:
s121, overall arrangement: the site selection of the precast beam field is performed at the intercommunicating section of the main line;
beam field longitudinal arrangement: a T beam storage area, a T beam production area (the length of a beam manufacturing pedestal is 3 multiplied by 35 m), a passageway, a steel reinforcement cage storage area, a steel reinforcement production area, a steel strand storage area, a template storage area, a steel reinforcement waste pool and the like, wherein the total length is 342.8m; transverse arrangement: 2 rows of beam making pedestals, 1 gantry crane track, and 21m wide;
the prestress pedestal is buried, the length is 110m, the whole width is 21m, and the beam-making pedestal is reinforced concrete;
s122, beam field pedestal construction: the beam field pedestal is the key of beam manufacturing, the pretensioned prestressing counter-force groove pedestal adopts a pre-buried mode, and 110 multiplied by 21 multiplied by 1.6m of the beam field pedestal area is applied with reinforced concrete to be connected into a whole for counteracting 1000T prestressing tensile stress;
s2, beam slab reinforcement processing and die filling:
s21, intensively producing the steel bars in a steel bar processing shed of a precast beam field, and cutting, bending and binding the steel bars;
arranging a 3cm protective layer concrete cushion block outside the steel frame, penetrating steel strands, grouping numbers after the beam slab steel bars are produced, and storing in a designated area;
s22, cleaning the template and coating special oil, wherein the screw drives the smearing plate to move, and the smearing plate and the smearing cloth can smear oil on the movable template;
s23, the truss girder is used for lifting the steel bar framework, the steel bar framework is connected with the truss girder through a plurality of hooks when the steel bar framework is hoisted, the steel bar framework is ensured not to deform in the hoisting process, and finally, the T-beam steel bar is sent into the channel template;
the method for embedding steel strands in the beam is adopted for hoisting the beam, four strong hoisting points are formed, four hoisting points are arranged at the two ends of the beam, two points are arranged at one side, the height of the embedded steel strands is 157cm, the first embedded steel strands are 150cm away from the two ends of the beam, the second steel strands are 115cm away from the first steel strands, the steel strand hooks are made of the same material as Liang Jiaoxian, and the steel strands are dispersed into 7 strands at the bottom of the beam so as to increase the anchoring force;
s3, prestress tensioning of the steel strand:
s31, before the first tensioning, the tensioning equipment is calibrated, tensioning can be performed after the tensioning equipment is qualified, and 2 YCW650A-300 intelligent jacks provided by an OVM at high speed are adopted as jacks for single-end tensioning;
s32, the steel strands of each beam are required to be connected with the strands of the adjacent beams through couplers; after the steel strand is installed, the steel strand and the steel wire rope tube are required to be inspected according to engineering;
steel strand wires require: yield strength is more than or equal to 1670N/mm 2 The method comprises the steps of carrying out a first treatment on the surface of the The ultimate strength is more than or equal to 1860N/mm 2 ；
S33, tensioning: the prestress tensioning is in a root-by-root tensioning mode, the tensioning is divided into two stages, the first stage is primary adjustment, and the primary adjustment tension is about 428N/mm < 2 >; the second stage is that the tensile control stress is 100% of the design stress, namely 1425N/mm < 2 >, the stretching length is 28cm, the error is controlled to be +/-5%, the tension process is controlled by the stress, and the elongation is used as auxiliary inspection;
the tensioning sequence is that the bottom 46 strands are firstly and then the top 5 strands are symmetrically arranged from the middle to the outside, and the actual strength and the elastic modulus of the concrete are not less than 85% of the strength and the elastic modulus of 28 days when the stress of the stranded wires is relaxed;
in the tensioning process, a special person checks and records the tensioning force and the actual elongation, and a set of complete tensioning process data is arranged, and in the tensioning process, if the actual elongation is found to be different from the theoretical elongation by more than 5%, or tensioning equipment is abnormal, the tensioning is stopped immediately, and the tensioning can be continued after the problem is solved;
tension is applied by a 25t front clamping jack and the tension device must be calibrated for use;
the strength of the concrete needs to be tested before tensioning, and the on-site concrete strength is provided by laboratory departments by testing on-site concrete test pieces maintained under the same conditions;
the jack pushes the movable cross beam to move, and the lower prestressed tendons, the middle prestressed tendons and the upper prestressed tendons are tensioned one by one through the cooperation of the movable cross beam, the first anchorage device, the third anchorage device and the second anchorage device;
s4, concrete pouring:
s41, mixing proportion of concrete: according to European standard specification, 525 cement is adopted, and an early strength agent is added into the concrete, so that the strength of the concrete can reach 50MPa quickly;
s42, when concrete is poured, the two movable templates are close to each other and are attached to the I-shaped plug template to form an I-shaped beam pouring groove, concrete is directly poured into the templates by a concrete transport vehicle, concrete is poured in layers according to the thickness of 30cm, each beam is poured from one end to the other end in a stepped mode, vibration of the concrete is carried out through an additional vibrator and an inserted vibrator, when the concrete is vibrated, the key is to control the vibration quantity of the horseshoe-shaped part at the bottom of the beam, the vibration time of the additional vibrator is controlled within 20S-30S, and the concrete is prevented from vibrating in place or excessively vibrating, so that the appearance quality of the beam is influenced;
in casting concrete, the laboratory department samples the concrete in the field, some samples must be steam cured with the beam, and the compressive strength of the concrete required for the transfer of these samples depends on whether they reach the values specified in the project;
s5, high-temperature steam curing: adopting a high-temperature steam curing mode, building a boiler at Liang Changna, uniformly arranging pipelines at the bottom of a T-shaped beam channel for diffusing steam, injecting high-temperature steam into a steam pipe through the steam boiler, pulling heat preservation cloth towards a clamping hook direction, covering a cage of a beam forming groove, curing a poured I-shaped beam, and covering the I-shaped beam with the heat preservation cloth, so that the temperature of the beam body is kept at 21-80 ℃, the steam cannot be directly aligned to the beam body to cause local high temperature, and reducing the environmental temperature in the curing cover at a rate of not more than 27 ℃ (0.74 ℃/min) per hour after the curing is completed;
the shrinkage of the T beam is reduced by steam curing, and the quality of the beam body is ensured, so that the design requirement is met;
at least two recording thermometers are arranged in each beam field channel to monitor the concrete and the curing rate; the time-temperature relation of T beam curing in the process from concrete covering to stress transfer can be obtained through a thermometer automatic recording system in the steam heating curing process, so that evaluation can be performed;
s6, placing: through laboratory detection, after the strength of the T beam concrete reaches 85% of the design strength, the T beam concrete is put under tension after waiting for 10 hours, and cutting equipment is adopted to cut the steel strands of the exposed part of the T beam;
s7, beam moving and storage: after the prestress of the steel strand is transferred to the concrete, the beam is detached from the template by connecting the embedded hanging rings at the two ends of the beam to the hanging ropes, and the hanging rings are embedded in Liang Tizhong before the concrete is poured in order to facilitate the hanging of the beam body;
before the beam body is hoisted, the end part of the beam must be treated, after the steel strand at the end of the beam is cut, cement paste or asphalt must be coated to prevent the steel strand from being exposed, if the appearance of the beam body is defective, the beam must be lifted after the treatment until the beam meets the requirements, and before the beam is moved, the beam body must be marked to indicate the use position of the beam and the construction time of the main working procedure of prefabrication of the beam body;
transferring the beam by using two 60T gantry cranes;
the entire width of the stacking beam is supported by two boards exceeding 10cm wide, the entire length of the beam is fixed to the ground by using a sufficiently high slat, the boards are placed from the beam ends at a distance of not more than 0.9 m, the boards supporting the beam are placed on the same vertical plane at both ends of the beam, and the supporting beam is identical to the storage beam during transportation.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
In the invention, the output shafts of a plurality of jacks are fixedly connected with the same movable cross beam, and a lower prestressed tendon, a middle prestressed tendon and an upper prestressed tendon all penetrate through the movable cross beam, and the outer walls of the lower prestressed tendon, the middle prestressed tendon and the upper prestressed tendon are all in threaded connection with a first anchor, a second anchor and a third anchor; the movable cross beam is pushed by the jack, the tensioning of one of the lower prestressed tendons is completed by the movable cross beam through the cooperation of the first anchor device and the third anchor device, the second anchor device on one of the lower prestressed tendons is screwed when the tensioning is finished, and then the plurality of lower prestressed tendons, the middle prestressed tendons and the upper prestressed tendons are tensioned one by one in a reciprocating mode, so that the construction efficiency is high, the safety is high, and the tensioning force is the same;
according to the invention, the top of the movable template is slidably connected with a coating plate, the coating plate is sleeved on the outer wall of a screw rod in a threaded manner, a cavity is arranged in the coating plate, and one side of the coating plate, which is far away from the I-shaped plug template, is provided with a plurality of oil storage holes for oiling the movable template; the oil in the oil storage tank is pumped into the cavity through the oil pump, the oil invades the wet coating rag from top to bottom through the oil storage hole, the motor is started to drive the screw rod to rotate, the screw rod drives the coating plate to move, the coating plate and the coating cloth can coat oil on the movable template, the movable template is reset at the later stage, and the damage to the I-beam caused by the movable template can be avoided through the coated oil;
according to the invention, a rolling roller is fixedly sleeved on the outer wall of the rotating shaft, heat preservation cloth is wound on the outer wall of the rolling roller, arc-shaped rods are fixedly connected to the tops of two fixed cross beams, sliding sleeves are slidably sleeved on the outer walls of the two arc-shaped rods, the same cross rod is fixedly connected between the two sliding sleeves, and the cross rod is fixedly connected with one end of the heat preservation cloth; the heat-insulating cloth is pulled to the clamping hook direction through the cross rod, and moves along the track of the arc-shaped rod, so that the heat-insulating cloth covers the beam forming grooves, diffusion of steam is avoided, and the temperature of the beam body is kept at 21-80 ℃;
according to the invention, a plurality of steam pipes are fixedly connected to one sides of the two fixed cross beams, which are close to each other, a plurality of air outlets are formed in one sides of the steam pipes, which are close to the I-shaped plug templates, and the steam pipes are communicated with a steam boiler through a gas pipeline; the steam boiler injects high-temperature steam into the steam pipe, the steam is injected into the beam forming groove through the air outlet, and the heat preservation cloth covers the beam forming groove, so that the temperature of the beam can be kept at 21-80 ℃.
According to the invention, the lower prestressed tendons, the middle prestressed tendons and the upper prestressed tendons can be tensioned one by one through the cooperation of the jack and the movable cross beam, the operation is simple, the construction efficiency is high, the safety is high, the tensioning force is the same, in addition, the composition and the separation of the pouring templates can be quickly carried out through the mutual approaching and separating of the two movable templates, the Cheng Liang efficiency of the I-beam is greatly improved, the I-beam can be maintained after the pouring of the I-beam is finished, the shrinkage of the T-beam is reduced, and the quality of a beam body is ensured.
Drawings
FIG. 1 is a schematic three-dimensional diagram of a pre-tensioned pre-stressing I-shaped Liang Kuai beam forming apparatus according to embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of a three-dimensional explosion structure of a pre-tensioned pre-stressing I-shaped Liang Kuai beam forming apparatus according to embodiment 1 of the present invention;
FIG. 3 is a schematic diagram showing a three-dimensional cross-sectional structure of a pre-tensioned pre-stressing I-shaped Liang Kuai beam forming apparatus according to embodiment 1 of the present invention;
FIG. 4 is a schematic side sectional view of a pre-tensioned pre-stressed I-beam rapid beam forming apparatus according to embodiment 1 of the present invention;
fig. 5 is a schematic three-dimensional structure diagram of a tensile structure of a pre-tensioned pre-stressed i-beam rapid girder-forming apparatus according to embodiment 1 of the present invention;
fig. 6 is a schematic diagram of a three-dimensional explosion structure of a oiling structure of a pretensioned prestressing i-beam rapid girder forming apparatus according to embodiment 1 of the present invention;
FIG. 7 is a schematic view showing a partial three-dimensional cross-sectional structure of a daubing plate of a pre-tensioned pre-stressing I-Liang Kuai beam forming apparatus according to embodiment 1 of the present invention;
FIG. 8 is a schematic view of a three-dimensional explosion structure of a curing structure of a pre-tensioned pre-stressed I-beam rapid beam forming apparatus according to embodiment 1 of the present invention;
FIG. 9 is a schematic view of a partial three-dimensional structure of a steam pipe of a pre-tensioned pre-stressed I-beam rapid beam forming apparatus according to embodiment 1 of the present invention;
FIG. 10 is a schematic side view of a portion of a stationary platen and a movable platen of a pretensioned prestressed I-beam rapid beam forming apparatus according to embodiment 2 of the present invention;
fig. 11 is a schematic top view of another fixing base of a fast beam forming apparatus for pretensioned prestressed i-beams according to embodiment 2 of the present invention.
Reference numerals:
1. a stationary pedestal; 2. fixing the cross beam; 3. i-shaped plug templates; 4. a movable cross beam; 5. a jack; 6. a lower prestressed tendon; 7. a middle prestressed tendon; 8. a pre-stressing tendon is arranged on the steel plate; 9. a first anchor; 10. a second anchor; 11. a third anchor; 12. moving the template; 13. a two-way screw rod; 14. a synchronizing wheel; 15. a synchronous belt; 16. a screw; 17. a smearing plate; 18. coating rag; 19. a cavity; 20. an oil storage hole; 21. an oil storage tank; 22. an oil delivery pipe; 23. a relief groove; 24. a steam pipe; 25. an air outlet; 26. recording a thermometer; 27. an arc-shaped rod; 28. a sliding sleeve; 29. a cross bar; 30. a clasp; 31. a rotating shaft; 32. a first torsion spring; 33. a winding roller; 34. a thermal insulation cloth; 35. a hook; 36. rectangular grooves; 37. a rotating lever; 38. a round sleeve; 39. a stop block; 40. a winding wheel; 41. a pull rope; 42. a second torsion spring; 43. a fixed disk.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled" and "mounted" should be interpreted broadly, and for example, "coupled" may or may not be detachably coupled; may be directly connected or indirectly connected through an intermediate medium. In addition, "communication" may be direct communication or may be indirect communication through an intermediary. Wherein, "fixed" means that the relative positional relationship is not changed after being connected to each other. References to orientation terms, such as "inner", "outer", "top", "bottom", etc., in the embodiments of the present invention are merely to refer to the orientation of the drawings and, therefore, the use of orientation terms is intended to better and more clearly illustrate and understand the embodiments of the present invention, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the embodiments of the present invention.
Example 1
Referring to fig. 1-9, a pretensioned prestressing i-beam rapid beam forming apparatus of the present embodiment includes: the two fixing pedestal 1 poured on the foundation are respectively provided with a fixing cross beam 2, one side, close to each other, of each fixing cross beam 2 is fixedly connected with one end of each fixing pedestal 1 through bolts, each fixing pedestal 1 and each fixing cross beam 2 form a beam forming groove, a plurality of lower prestressed tendons 6, middle prestressed tendons 7 and upper prestressed tendons 8 sequentially penetrate through the beam forming grooves from top to bottom, two I-shaped plug templates 3 are arranged in the beam forming grooves, and each lower prestressed tendons 6, each middle prestressed tendons 7 and each upper prestressed tendons 8 penetrate through each I-shaped plug template 3; two movable templates 12 are connected in a sliding way in the beam forming groove; the tensioning structure is arranged on one side of one fixed beam 2 and is used for tensioning the lower prestressed tendons 6, the middle prestressed tendons 7 and the upper prestressed tendons 8; the oiling structure is arranged at the top of the movable template 12 and is used for oiling the movable template 12; and the maintenance structure is arranged on one side of one of the fixing pedestals 1 and is used for maintaining the I-beam in the beam forming groove.
Referring to fig. 2 and 5, the tension structure comprises a plurality of jacks 5 fixedly connected to one side of one fixed beam 2 through bolts, wherein the output shafts of the plurality of jacks 5 are fixedly connected with the same movable beam 4 through bolts, the lower prestressed tendons 6, the middle prestressed tendons 7 and the upper prestressed tendons 8 penetrate through the movable beam 4, the outer walls of the lower prestressed tendons 6, the middle prestressed tendons 7 and the upper prestressed tendons 8 are respectively in threaded connection with a first anchor 9, a second anchor 10 and a third anchor 11, the second anchor 10 is in contact with one fixed beam 2, the third anchor 11 is in contact with one side of the movable beam 4 away from the fixed beam 2, and the first anchor 9 is in contact with one side of the other fixed beam 2 away from the movable beam 4; the movable cross beam 4 is pushed by the jack 5, the movable cross beam 4 stretches one of the lower prestressed tendons 6 through the cooperation of the first anchorage 9 and the third anchorage 11, so that the lower prestressed tendons 6 reach stretching force, when stretching is finished, the second anchorage 10 on one of the lower prestressed tendons 6 is screwed, the second anchorage 10 is contacted with the fixed cross beam 2, and then the reciprocating operation stretches the plurality of lower prestressed tendons 6, the middle prestressed tendons 7 and the upper prestressed tendons 8 one by one, so that the construction efficiency is high, the safety is high, and the stretching force is the same.
Referring to fig. 2, 3, 4, 6 and 7, the oiling structure comprises a screw 16 rotatably connected to the top of a movable template 12 through a base, the top of the movable template 12 is slidably connected with an smearing plate 17, the smearing plate 17 is sleeved on the outer wall of the screw 16 in a threaded manner, a cavity 19 is arranged in the smearing plate 17, a plurality of oil storage holes 20 for oiling the movable template 12 are formed in one side of the smearing plate 17 away from an I-shaped plug template 3, an smearing cloth 18 matched with the oil storage holes 20 is arranged in one side of the smearing plate 17, an oil storage tank 21 is fixedly connected to one side of the movable template 12 away from the I-shaped plug template 3 through bolts, an oil conveying pipe 22 is arranged at the top of the oil storage tank 21, and the oil conveying pipe 22 is communicated with the cavity 19; the oil in the oil storage tank 21 is pumped into the cavity 19 through the oil pump, the oil wets the smearing cloth 18 from top to bottom through the oil storage hole 20, the motor is started to drive the screw 16 to rotate, the screw 16 drives the smearing plate 17 to move, and the smearing plate 17 and the smearing cloth 18 can smear oil on the movable template 12.
Referring to fig. 2, 3 and 8, the maintenance structure comprises a rotating shaft 31 rotatably connected to one side of one fixing pedestal 1 through a base, a winding roller 33 is fixedly sleeved on the outer wall of the rotating shaft 31, two first torsion springs 32 are sleeved on the outer wall of the rotating shaft 31, one ends of the two first torsion springs 32, which are close to each other, are fixedly connected with two ends of the winding roller 33 respectively, the other ends of the first torsion springs 32 are fixedly connected with the base, a heat preservation cloth 34 is wound on the outer wall of the winding roller 33, arc-shaped rods 27 are fixedly connected to the tops of two fixing cross beams 2, sliding sleeves 28 are sleeved on the outer walls of the two arc-shaped rods 27, the same cross rod 29 is fixedly connected between the two sliding sleeves 28 through bolts, and the cross rod 29 is fixedly connected with one end of the heat preservation cloth 34; the heat preservation cloth 34 is pulled towards the direction of the clamping hooks 35 through the cross rod 29, the heat preservation cloth 34 moves along the track of the arc-shaped rod 27, and the covering of the heat preservation cloth 34 on the beam forming grooves is completed and used for avoiding the diffusion of steam, and the body temperature of the beam is kept at 21-80 ℃.
Referring to fig. 6, 8 and 9, the maintenance structure further comprises a plurality of steam pipes 24 fixedly connected to one sides of the two fixed cross beams 2, which are close to each other, through bolts, a plurality of air outlets 25 are formed in one side of the steam pipe 24, which is close to the i-shaped plug template 3, and the steam pipe 24 is communicated with the steam boiler through an air pipeline; the steam boiler injects high-temperature steam into the steam pipe 24, the steam is injected into the beam forming groove through the air outlet 25, and the heat preservation cloth 34 is used for covering the beam forming groove, so that the temperature of the beam is kept at 21-80 ℃.
Referring to fig. 2 and 6, the two stationary bases 1 are provided with a relief groove 23 for relieving the oil reservoir 21 on the side close to each other, and a plurality of recording thermometers 26 are provided on the side of the other stationary base 1.
Referring to fig. 2, 3 and 8, a plurality of hooks 35 are provided at the top of the fixing base 1 far from the thermal insulation cloth 34, a plurality of clasps 30 are provided at one side of the cross bar 29, and the clasps 30 are engaged with the hooks 35; the thermal insulation cloth 34 can be completely covered into a beam groove through the matching of the clamping ring 30 and the clamping hook 35.
Referring to fig. 2 and 6, two bidirectional screw rods 13 are rotatably connected in the beam forming groove, one ends of the two bidirectional screw rods 13 penetrate through the two movable templates 12 in a threaded manner, the two movable templates 12 are respectively positioned on the front and back threaded sections of the bidirectional screw rods 13, one ends of the two bidirectional screw rods 13 extend to the outer side of the beam forming groove and are fixedly connected with synchronous wheels 14, and the two synchronous wheels 14 are in transmission connection through a synchronous belt 15; the two bidirectional screw rods 13 rotate simultaneously, the two movable templates 12 are close to each other until the two movable templates 12 are attached to the I-shaped plug template 3, an I-shaped beam pouring groove can be formed through the cooperation of the two movable templates 12 and the I-shaped plug template 3, concrete can be poured through a concrete carrier vehicle at the later stage conveniently, and the pouring speed of the I-shaped beam is increased.
Example 2
The improvement of the embodiment based on the embodiment 1 is that:
referring to fig. 2, 10 and 11, a rectangular groove 36 is formed in the top of the fixing pedestal 1 far away from the thermal insulation cloth 34, a rotating rod 37 is rotationally connected to the rectangular groove 36, two fixing plates 43 are fixedly sleeved on the outer wall of the rotating rod 37, two second torsion springs 42 are sleeved on the outer wall of the rotating rod 37, one ends, close to each other, of the two second torsion springs 42 are fixedly connected with the fixing plates 43 respectively, the other ends of the second torsion springs 42 are fixedly connected with one side inner wall of the rectangular groove 36, a plurality of round sleeves 38 and rolling wheels 40 are fixedly sleeved on the outer wall of the rotating rod 37, the bottom ends of the hooks 35 are fixedly connected with the top of the round sleeves 38, a plurality of pull ropes 41 are arranged on one side of the movable template 12, the other ends of the pull ropes 41 extend into the rectangular groove 36 and are fixedly connected with the rolling wheels 40, a plurality of stop blocks 39 are fixedly connected with the bottom inner wall of the rectangular groove 36, and the stop blocks 39 limit the hooks 35; when the movable template 12 moves towards the middle, when the movable template 12 is contacted with the I-shaped plug template 3, the movable template 12 pulls the rotating rod 37 by 90 degrees through the pull rope 41, the clamping hooks 35 are in a vertical state, the stop blocks 39 block the clamping hooks 35, after the I-shaped beam is formed, the movable template 12 resets, the rotating rod 37 reversely rotates by 90 degrees under the torsion action of the second torsion spring 42, the clamping hooks 35 can be laid in the rectangular grooves 36, at the moment, the clamping hooks 35 can be released from the clamping buckles between the clamping rings 30, the rotating shaft 31 and the winding roller 33 wind the heat preservation cloth 34 again under the torsion action of the first torsion spring 32, and then the I-shaped beam is taken out through the sling.
A pretensioned prestressing I-beam rapid girder forming device comprises the following steps:
s1, placing two I-shaped plug templates 3 in a girder forming groove, gathering the two I-shaped plug templates 3 for a certain distance, then penetrating a plurality of lower prestressed tendons 6, middle prestressed tendons 7 and upper prestressed tendons 8 through a movable cross beam 4, two fixed cross beams 2 and the I-shaped plug templates 3 respectively, firstly sleeving one ends of the lower prestressed tendons 6, the middle prestressed tendons 7 and the upper prestressed tendons 8 through a first anchor 9, enabling the first anchor 9 to be just contacted with the other fixed cross beam 2, sleeving a second anchor 10 on the lower prestressed tendons 6, the middle prestressed tendons 7 and the upper prestressed tendons 8, enabling the second anchor 10 to be contacted with one fixed cross beam 2, sleeving a third anchor 11 on the other ends of the lower prestressed tendons 6, the middle prestressed tendons 7 and the upper prestressed tendons 8, then screwing the third anchor 11 on one lower prestressed tendons 6, enabling the third anchor 11 to be contacted with the movable cross beam 4, pushing the movable cross beam 4 through the jack 5, enabling the movable cross beam 4 to be contacted with the lower prestressed tendons 6 through the first anchor 9 and the third anchor 11, and enabling the lower prestressed tendons 6 to be in a reciprocating manner to be in a high-efficient manner when the lower prestressed tendons 6 are matched with the lower prestressed tendons 6 and the upper prestressed tendons 6, and the lower prestressed tendons 10 are not in a reciprocating manner, and the tension is completed, and the tension is kept high-safe, and the tension is kept at the same;
s2, binding reinforcing steel bars between the two I-shaped plug templates 3 after tensioning is finished, pumping oil in an oil storage tank 21 into a cavity 19 through an oil pump, wetting the smearing cloth 18 from top to bottom through an oil storage hole 20, starting a motor to drive a screw 16 to rotate, driving the smearing plate 17 to move by the screw 16, and oiling the moving template 12 by the smearing plate 17 and the smearing cloth 18;
s3, starting a motor to drive one of the two-way screw rods 13 to rotate, wherein the two-way screw rods 13 are in transmission connection with each other through a synchronous pulley 14 and a synchronous belt 15, the two-way screw rods 13 simultaneously rotate, the two movable templates 12 are close to each other until the two movable templates 12 are attached to the I-shaped plug template 3, an I-shaped beam pouring groove can be formed through the matching of the two movable templates 12 and the I-shaped plug template 3, when concrete is poured, the concrete is directly poured into the templates by a concrete carrier, the concrete is poured in layers according to the thickness of 30cm, each beam is poured in a stepped mode from one end to the other end, vibration of the concrete is carried out through an additional vibrator and an inserted vibrator, during vibration, the key is to control the vibration quantity of a horseshoe-shaped part at the bottom of the beam, and the vibration time of the additional vibrator is controlled within 20S-30S, so that the concrete is prevented from vibrating in place or excessively vibrating, and the appearance quality of the beam is prevented from being influenced;
s4, after pouring is finished, high-temperature steam is injected into a steam pipe 24 through a steam boiler, the steam is injected into a beam forming groove through an air outlet 25, heat preservation cloth 34 is pulled towards a clamping hook 35 through a cross rod 29, the heat preservation cloth 34 moves along the track of an arc rod 27, the heat preservation cloth 34 is covered on the beam forming groove through the clamping ring 30 and the clamping hook 35, the temperature of a beam body is kept at 21-80 ℃ after the casting is finished, the environmental temperature in a curing cover is reduced at a rate of not more than 0.74 ℃/min per hour after curing is finished, a plurality of recording thermometers 26 are arranged for monitoring concrete and curing rate, and the time-temperature relation of T beam curing from concrete coverage to stress transmission can be obtained through a thermometer automatic recording system in the steam heating curing process, so that evaluation is carried out;
s5, when the movable template 12 moves towards the middle, when the movable template 12 is contacted with the I-shaped plug template 3, the movable template 12 pulls the rotating rod 37 by 90 degrees through the pull rope 41, the clamping hooks 35 are in a vertical state, the stop blocks 39 block the clamping hooks 35, after the I-shaped beam is formed, the movable template 12 is reset, the rotating rod 37 reversely rotates by 90 degrees under the torsion action of the second torsion spring 42, the clamping hooks 35 can be laid in the rectangular grooves 36, at the moment, the clamping hooks 35 can release the clamping buckles with the clamping rings 30, the rotating shaft 31 and the winding rollers 33 wind the heat preservation cloth 34 again under the torsion action of the first torsion spring 32, and then the I-shaped beam is taken out through the lifting ropes.
However, as is well known to those skilled in the art, the working principle and wiring method of the jack 5 and the recording thermometer 26 are common, which are all conventional means or common knowledge, and will not be described herein in detail, and any choice can be made by those skilled in the art according to their needs or convenience.
The present invention is not limited to the above embodiments, and any person skilled in the art can easily think about the changes or substitutions within the technical scope of the present invention, and the changes or substitutions are intended to be covered by the scope of the present invention; embodiments of the invention and features of the embodiments may be combined with each other without conflict. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. A pretensioned prestressing i-beam rapid beam forming apparatus, comprising:
the two fixing pedestals (1) are poured on the foundation, two fixing cross beams (2) are arranged at two ends of each fixing pedestal (1), one sides, close to each other, of each fixing cross beam (2) are fixedly connected with one ends of each fixing pedestal (1), each fixing pedestal (1) and each fixing cross beam (2) form a girder forming groove, a plurality of lower prestressed tendons (6), middle prestressed tendons (7) and upper prestressed tendons (8) sequentially penetrate through the girder forming grooves from top to bottom, two I-shaped plug templates (3) are arranged in the girder forming grooves, and the lower prestressed tendons (6), the middle prestressed tendons (7) and the upper prestressed tendons (8) penetrate through the I-shaped plug templates (3);
two movable templates (12) are connected in a sliding way in the beam forming groove;
the tensioning structure is arranged on one side of one fixed cross beam (2) and is used for tensioning the lower prestressed tendons (6), the middle prestressed tendons (7) and the upper prestressed tendons (8);
the oiling structure is arranged at the top of the movable template (12) and is used for oiling the movable template (12);
and the maintenance structure is arranged on one side of one of the fixing pedestals (1) and is used for maintaining the I-beam in the beam forming groove.
2. The pre-tensioning method pre-stressing i-beam rapid beam forming device according to claim 1, characterized in that the tensioning structure comprises a plurality of jacks (5) fixedly connected to one side of one of the fixed beams (2), the output shafts of the jacks (5) are fixedly connected with the same movable beam (4), the lower pre-stressing tendons (6), the middle pre-stressing tendons (7) and the upper pre-stressing tendons (8) penetrate through the movable beam (4), the outer walls of the lower pre-stressing tendons (6), the middle pre-stressing tendons (7) and the upper pre-stressing tendons (8) are respectively connected with a first anchor (9), a second anchor (10) and a third anchor (11) in a threaded manner, the second anchor (10) is contacted with one of the fixed beams (2), the third anchor (11) is contacted with one side of the movable beam (4) away from the fixed beam (2), and the first anchor (9) is contacted with one side of the other fixed beam (2) away from the movable beam (4).
3. The pretensioned prestressing i-beam rapid girder forming device according to claim 1, wherein the oiling structure comprises a screw rod (16) rotatably connected to the top of a movable template (12) through a base, the top of the movable template (12) is slidably connected with an oiling plate (17), the oiling plate (17) is sleeved on the outer wall of the screw rod (16) in a threaded manner, a cavity (19) is arranged in the oiling plate (17), a plurality of oil storage holes (20) for oiling the movable template (12) are formed in one side, far away from the i-plug template (3), of the oiling plate (17), an oiling cloth (18) matched with the oil storage holes (20) is arranged in one side, far away from the i-plug template (3), of the movable template (12) is fixedly connected with an oil storage tank (21), an oil delivery pipe (22) is arranged at the top of the oil storage tank (21), and the oil delivery pipe (22) is communicated with the cavity (19).
4. The pretensioned prestressing i-beam rapid girder forming device according to claim 2, characterized in that the maintenance structure comprises a rotating shaft (31) rotatably connected to one side of one fixing pedestal (1) through a base, a rolling roller (33) is fixedly sleeved on the outer wall of the rotating shaft (31), two first torsion springs (32) are sleeved on the outer wall of the rotating shaft (31), one ends of the two first torsion springs (32) close to each other are fixedly connected with two ends of the rolling roller (33), the other ends of the first torsion springs (32) are fixedly connected with the base, an insulation cloth (34) is wound on the outer wall of the rolling roller (33), arc rods (27) are fixedly connected to the tops of the two fixing beams (2), sliding sleeves (28) are sleeved on the outer walls of the two arc rods (27) in a sliding mode, one cross rod (29) is fixedly connected between the two sliding sleeves (28), and one end of the cross rod (29) is fixedly connected with one end of the insulation cloth (34).
5. The pretensioned prestressing i-beam rapid beam forming device according to claim 4, wherein the maintenance structure further comprises a plurality of steam pipes (24) fixedly connected to one side of the two fixed beams (2) close to each other, a plurality of air outlets (25) are formed in one side of the steam pipes (24) close to the i-plug template (3), and the steam pipes (24) are communicated with the steam boiler through air pipelines.
6. The pretensioned prestressed i-beam rapid girder-forming device according to claim 5, characterized in that both sides of the two stationary bases (1) close to each other are provided with a yielding groove (23) for yielding the oil reservoir (21), and that one side of the other stationary base (1) is provided with a plurality of recording thermometers (26).
7. The pretensioned prestressing i-beam rapid beam forming device according to claim 6, wherein a plurality of hooks (35) are provided at the top of the fixing base (1) far away from the thermal insulation cloth (34), a plurality of snap rings (30) are provided at one side of the cross bar (29), and the snap rings (30) are buckled with the hooks (35).
8. The pretensioned prestressing i-beam rapid beam forming device according to claim 7, wherein two bidirectional screw rods (13) are rotationally connected in the beam forming groove, one ends of the two bidirectional screw rods (13) penetrate through the two movable templates (12) in a threaded manner, the two movable templates (12) are respectively positioned on the positive and negative thread sections of the bidirectional screw rods (13), one ends of the two bidirectional screw rods (13) extend to the outer side of the beam forming groove and are fixedly connected with synchronous wheels (14), and the two synchronous wheels (14) are in transmission connection through a synchronous belt (15).
9. The pretensioned prestressing i-beam rapid beam forming device according to claim 4, wherein a rectangular groove (36) is formed in the top of the fixing base (1) far away from the thermal insulation cloth (34), a rotating rod (37) is rotationally connected to the rectangular groove (36), two fixing plates (43) are fixedly sleeved on the outer wall of the rotating rod (37), two second torsion springs (42) are sleeved on the outer wall of the rotating rod (37), one ends of the two second torsion springs (42) close to each other are fixedly connected with the fixing plates (43), the other ends of the second torsion springs (42) are fixedly connected with one side inner wall of the rectangular groove (36), a plurality of round sleeves (38) and a rolling wheel (40) are fixedly sleeved on the outer wall of the rotating rod (37), the bottom end of a clamping hook (35) is fixedly connected with the top of the round sleeve (38), a plurality of pull ropes (41) are arranged on one side of the moving template (12), the other ends of the pull ropes (41) extend into the rectangular groove (36) and are fixedly connected with the rolling wheel (40), and the bottom of the rectangular groove (36) is fixedly connected with a plurality of stop blocks (39).
10. A pretensioned prestressing i-beam rapid beam forming process, which is applied to the pretensioned prestressing i-beam rapid beam forming device according to any one of claims 1 to 9, and comprises the following steps:
s1, pre-tensioning method prestress beam field construction: performing longitudinal arrangement and transverse arrangement of a beam field;
s2, beam slab reinforcement processing and die filling: the screw (16) drives the smearing plate (17) to move, and the smearing plate (17) and the smearing cloth (18) can smear oil on the movable template (12);
s3, prestress tensioning of the steel strand: the jack (5) pushes the movable cross beam (4) to move, and the lower prestressed tendons (6), the middle prestressed tendons (7) and the upper prestressed tendons (8) are tensioned one by one through the cooperation of the movable cross beam (4), the first anchorage device (9), the third anchorage device (11) and the second anchorage device (10);
s4, concrete pouring: the two movable templates (12) are close to each other and are attached to the I-shaped plug template (3) to form an I-shaped beam pouring groove, and concrete is directly discharged into the template by the concrete carrier;
s5, high-temperature steam curing: adopting a high-temperature steam curing mode, building a boiler at Liang Changna, uniformly arranging pipelines at the bottom of a T-beam channel for diffusing steam, injecting high-temperature steam into a steam pipe (24) through the steam boiler, pulling a heat insulation cloth (34) towards a clamping hook (35), covering a beam forming groove, and curing the poured I-beam;
s6, placing: through laboratory detection, after the strength of the T beam concrete reaches 85% of the design strength, the T beam concrete is put under tension after waiting for 10 hours, and cutting equipment is adopted to cut the steel strands of the exposed part of the T beam;
s7, beam moving and storage: after the prestress of the steel strand is transferred to the concrete, the beam is detached from the template by connecting the embedded hanging rings at the two ends of the beam to the sling;
the entire width of the stacking beam is supported by two boards exceeding 10cm width, the boards supporting the cross beam are placed on the same vertical plane at both ends of the cross beam, and the supporting beam is identical to the storage beam in the transportation process.
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| CN110142857A (en) * | 2019-05-13 | 2019-08-20 | 湖北广盛建筑产业化科技有限公司 | A kind of semi-underground prefabricated member maintenance warehouse |
| CN112677296A (en) * | 2020-12-23 | 2021-04-20 | 保利长大工程有限公司 | Template with heat preservation cavity |
| CN113048382A (en) * | 2021-03-17 | 2021-06-29 | 安徽春华智能科技有限公司 | Guide rail maintenance device for European-style double-girder crane |
| CN216831552U (en) * | 2021-11-20 | 2022-06-28 | 南京南化建设有限公司 | Steel bar formwork positioning device in reinforced concrete member |
| CN217835473U (en) * | 2022-01-07 | 2022-11-18 | 山东海沃篷布有限公司 | Automatic tarpaulin machine of turning on one's side |
| CN218083367U (en) * | 2022-06-24 | 2022-12-20 | 羊海文 | Municipal administration road bridge pretension method prestressing force is put and is opened construction equipment |
| CN116141471A (en) * | 2023-02-02 | 2023-05-23 | 赵世峰 | Precast box girder cleaning spraying machine |
| CN116423651A (en) * | 2023-03-13 | 2023-07-14 | 山东省公路桥梁建设集团有限公司 | Construction process of broken line pretensioned prestressed concrete I-beam |
| CN116623555A (en) * | 2023-06-14 | 2023-08-22 | 山东高速材料科技有限公司 | Bridge deck ultra-high performance concrete curing means |
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