CN109483726B - Prefabricated box girder steel frame binding hydraulic formwork and construction method - Google Patents

Prefabricated box girder steel frame binding hydraulic formwork and construction method Download PDF

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Publication number
CN109483726B
CN109483726B CN201811523293.6A CN201811523293A CN109483726B CN 109483726 B CN109483726 B CN 109483726B CN 201811523293 A CN201811523293 A CN 201811523293A CN 109483726 B CN109483726 B CN 109483726B
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hydraulic
stirrups
steel
hydraulic system
moving
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CN109483726A (en
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吴江
张友全
徐宏海
申洛岑
曹超云
曹连聪
徐建东
黄剑云
傅健云
肖天翔
段群苗
周一勤
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Ningbo Communication Engineering Construction Group Co Ltd
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Ningbo Communication Engineering Construction Group Co Ltd
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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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

The utility model discloses a prefabricated box girder steel reinforcement framework binding hydraulic formwork and a construction method, which belong to the field of bridge construction, and structurally comprise a track, a movable frame, a steel reinforcement framework and the like, wherein the two movable frames and a fixed base are combined, and the two movable frames are synchronously driven by a plurality of hydraulic systems to relatively move and fold so as to position the binding formation of the steel reinforcement framework, or move and separate from the steel reinforcement framework so as to facilitate hanging out, and the structure has the advantages that: firstly, the structure is simple, the use is convenient, and the labor intensity of operators is reduced; secondly, the manufacturing precision of the steel reinforcement framework is high, the error is small, the thickness of the concrete protection layer of the box girder is guaranteed, and the durability is improved; thirdly, the hydraulic system improves the mechanization degree of the die carrier, the construction is quick, and the production efficiency is high. Therefore, the hydraulic formwork for binding the prefabricated box girder steel reinforcement framework is designed and combined with a corresponding construction method, and has the advantages of improving the overall construction quality, enhancing the durability of the engineering structure, saving energy, reducing emission and the like, and has remarkable economic and social benefits.

Description

Hydraulic formwork for binding reinforcement framework of prefabricated box girder and construction method
Technical Field
The utility model relates to the field of bridge construction, in particular to a hydraulic formwork for binding a prefabricated box girder steel reinforcement framework and a construction method.
Background
The prefabricated box girder is used for separately binding and forming the U-shaped steel reinforcement framework below the top plate and the top plate steel reinforcement framework, integrally hanging the U-shaped steel reinforcement framework into the prefabricated outer formwork, and then placing the inner mold, installing the top plate steel reinforcement framework and pouring concrete. In the procedures, the precision requirement of binding the U-shaped steel reinforcement framework is high, the technical performance is strong, and meanwhile, the procedures are the most complicated and the greatest in manpower consumption. At present, generally, the bottom of a U-shaped steel reinforcement framework is provided with a fixed steel bottom die for positioning bottom longitudinal steel bars and bottom plate stirrups, two sides of the U-shaped steel reinforcement framework are provided with web steel positioning die frames for positioning web longitudinal steel bars and web stirrups, and three methods are provided: firstly, the fixed two-side die frames are respectively arranged at two sides of the U-shaped steel reinforcement framework, the structure of the method is simple, but because of the existence of frictional resistance between the fixed die frames at two sides of the U-shaped steel reinforcement framework and the longitudinal steel reinforcement of the web plate and the web plate stirrups, the U-shaped steel reinforcement framework is difficult to integrally hoist out, so that a certain gap allowance is reserved between the fixed die frames at two sides and the longitudinal steel reinforcement and the web plate steel reinforcement, which affects the precision of the U-shaped steel reinforcement framework; secondly, the movable two-side die frames are arranged on two sides of the U-shaped steel bar framework, the web longitudinal steel bars and the web stirrups are fixed, positioned and bound and then removed, the two-side die frames are manually moved, time and labor are wasted, and labor intensity of operators is high; thirdly, the movable two-side die frames are fixed, and the disclosed utility model patent CN201420061840.4 is a prefabricated small box girder steel reinforcement framework tire die frame for the expressway, namely, a support rod with a large number of side web steel reinforcements is rotated to separate a positioning clamping head from the steel reinforcement framework, so that the whole steel reinforcement framework is separated from the two-side die frames, and the method also has the defect of time and labor waste.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the hydraulic die carrier for binding the prefabricated box girder steel reinforcement framework, which has the advantages of simple structure, convenient use, reduced error and high mechanization degree, and the construction method.
The technical problems of the utility model are realized by the following technical scheme:
the utility model provides a prefabricated box girder framework of steel reinforcement hydraulic die carrier, includes two rows of tracks of installing on ground and install the movable frame on two rows of tracks of symmetry respectively, is used for framework of steel reinforcement to tie up the shaping between two movable frames, two rows of tracks between be equipped with the unable adjustment base that is located the framework of steel reinforcement below, this unable adjustment base lower part is equipped with a plurality of hydraulic systems of installing along vertical, the horizontal both sides of every hydraulic system are equipped with the hydraulic stem respectively, and the hydraulic stem of every hydraulic system both sides is fixed with two movable frames respectively; the hydraulic systems synchronously drive the two movable frames to move and fold relatively on the two rows of tracks to position the reinforcement cage for binding and forming, or to move relatively and separate from the reinforcement cage.
The fixed base is a steel truss which is horizontally arranged and comprises two longitudinal beams which are parallelly embedded on the cement concrete ground, and a plurality of cross beams which are arranged between the two longitudinal beams and are longitudinally and equidistantly arranged, and the cross beams are mutually parallel; each longitudinal beam is composed of square steel and longitudinal beam channel steel which is fixed on the square steel in a superposition manner and is concave upwards, and a plurality of longitudinal beam positioning grooves which are equidistantly arranged along the length direction of the longitudinal beam channel steel are formed in the inner side wall of the longitudinal beam channel steel; the square steel is longitudinally provided with a plurality of sections, and a longitudinal beam opening for installing the hydraulic system is reserved between every two adjacent sections of square steel; every the crossbeam be the steel sheet, and the height after the crossbeam installation is the same with longeron channel-section steel height, the top surface of every crossbeam all is equipped with a plurality of crossbeam constant head tanks that set up along crossbeam length direction equidistance.
Each movable frame comprises a bottom frame and a plurality of vertical frames fixed on the bottom frame at equal intervals along the longitudinal direction, the bottom frame is a horizontal steel truss, each vertical frame is a right-angle trapezoid steel truss with wide bottom and narrow top, the bottom of each vertical frame is provided with a movable wheel movably arranged on a track, and each vertical frame is internally provided with a plurality of auxiliary rib positioning rods which are equidistantly arranged along the height direction; the top of a plurality of vertical frames is provided with a top edge to be connected, a continuous vertical stirrup positioning rod is arranged between auxiliary stirrup positioning rods with equal height in the middle of the plurality of vertical frames, a plurality of vertical stirrup positioning grooves which are arranged along the length direction of the vertical stirrup positioning rod at equal intervals are arranged on the vertical stirrup positioning rod, and the number of the vertical stirrup positioning grooves is the same as that of the longitudinal beam positioning grooves.
The steel reinforcement framework comprises main reinforcements, auxiliary reinforcements, flat stirrups and vertical stirrups, wherein the main reinforcements are longitudinally arranged in an upper row and a lower row along the fixed base, the trapezoidal flat stirrups are wrapped and fixedly bound, the auxiliary reinforcements are horizontally arranged in an inner row and an outer row along the vertical frame, the diameters of the auxiliary reinforcements are smaller than those of the main reinforcements, the parallelogram vertical stirrups are wrapped and bound, and the number and the diameters of the flat stirrups and the vertical stirrups are the same; the main reinforcement, the auxiliary reinforcement, the flat stirrup and the vertical stirrup are positioned, bound or welded by the hydraulic formwork binding of the prefabricated box girder steel reinforcement framework to form the steel reinforcement framework, and are hung into the prefabricated box girder formwork to perform concrete pouring.
The longitudinal beam positioning groove is square and is used for positioning vertical stirrups and flat stirrups of the reinforcement framework, the square longitudinal length of the longitudinal beam positioning groove is the sum of the outer diameters of the vertical stirrups and the flat stirrups, and the square depth is the radius of the vertical stirrups and the flat stirrups; the beam positioning groove is semicircular, and the radius is the same as the outer diameter of the main rib; the vertical stirrup positioning groove is semicircular and is used for positioning the vertical stirrup.
Each hydraulic system comprises two double-acting hydraulic jacks which are combined and fixed on the cement concrete ground, the end part of each hydraulic rod of each hydraulic jack is connected with and propped against a bracket fixed at the bottom of the movable frame, and the hydraulic systems are uniformly controlled by a computer.
The movable wheels are steel wheels, two movable wheels are arranged at the bottom of each vertical frame, the movable wheels A are arranged close to the fixed underframe, the movable wheels B are arranged far away from the fixed underframe, the width of each movable wheel is 1-2 mm smaller than that of the track, and lubricant is smeared in the track.
The total driving force of the bracket at the bottom of the movable frame, which is applied by the hydraulic system, isThe horizontal distance between the contact and the propping part of the bracket at the bottom of the movable frame and the hydraulic rod is +.>Total driving force of hydraulic system +.>Height from ground is +.>The method comprises the steps of carrying out a first treatment on the surface of the The weight of each side of the movable frame is +.>The horizontal distance between the action point and the center of the moving wheel A is vertical downwards>The method comprises the steps of carrying out a first treatment on the surface of the Each side of the movable frame shares the weight of the reinforcement cage as +.>The horizontal distance between the action point and the center of the moving wheel A is vertical downwards>The height from the ground is +.>The static friction resistance between the auxiliary rib positioning rod and the auxiliary rib positioning rod is +.>Sliding friction is +.>The method comprises the steps of carrying out a first treatment on the surface of the The static friction resistance of the moving wheel A, the moving wheel B and the track surface is +.>The method comprises the steps of carrying out a first treatment on the surface of the By the force balance principle, the counter force of the movable wheels A and B and the total driving force required by the hydraulic system to overcome the static friction resistance +.>The movable frame can only move without tilting the total driving force +.>Calculated from the following formula:
equation one,
When the hydraulic system is not started, the counterforce of the movable wheel A and the movable wheel B is that
Formula II,
When the hydraulic system is started and the moving frame just starts to move, the hydraulic system overcomes the total driving force required by the static friction resistanceIs that
Formula III,
After the hydraulic system is started, the total thrust of the hydraulic systemThe lower two moving frames are pushed to move outwards simultaneously, the left moving frame cannot rotate clockwise around the moving wheel A due to the support of the steel reinforcement framework, only can rotate anticlockwise around the moving wheel B, the right moving frame cannot rotate anticlockwise around the moving wheel A, only can rotate clockwise around the moving wheel B, and at the moment, the two moving wheels B are separated from the track surface>The side of either side of the wheel B is +.>Get the moment, any side removes the frame and can not topple and need satisfy following formula:
in equation one, equation two, and equation three
-when the hydraulic system is not activated, the reaction force of the moving wheel a, +.>；
-when the hydraulic system is not activated, the reaction force of the mobile wheel B, +.>；
-weight of the moving rack on each side, +.>；
-the weight of the reinforcement cage is shared by the moving frames at each side, < >>；
The carriage at the bottom of the mobile frame is totally driven by the hydraulic systemGeneral term of force, < ->；
When the hydraulic system is started and the moving frame just starts to move, the hydraulic system overcomes the total driving force required by the static friction resistance, +.>；
After the hydraulic system is started, the movable frame is pushed to move outwards by the total thrust of the hydraulic system, and the movable frame does not generate the total driving force of anticlockwise overturning, namely +.>；
-horizontal distance of contact of bracket at bottom of moving rack and hydraulic rod, +.>；
-each side of the moving frame shares the weight of the reinforcement cage +.>Horizontal distance of the point of action from the centre of the mobile wheel a, < >>；
-horizontal distance between moving wheel a, moving wheel B, +.>；
-each side of the moving frame shares the weight of the reinforcement cage +.>The height of the action point and the ground, +.>；
-the frictional resistance of the moving wheel a against the track surface,/->；
-the frictional resistance of the moving wheel B against the track surface,/->；
The weight of the steel bar framework shared by each side of the movable frame is +.>The static friction resistance between the auxiliary rib positioning rod and the auxiliary rib positioning rod,；
the weight of the steel bar framework shared by each side of the movable frame is +.>Sliding friction between the auxiliary rib positioning rod and the auxiliary rib positioning rod,；
-the coefficients of static friction resistance of the moving wheel a, the moving wheel B and the track surface;
the weight of the steel bar framework shared by each side of the movable frame is +.>The friction coefficient between the auxiliary rib positioning rod and the auxiliary rib positioning rod;
the weight of the steel bar framework shared by each side of the movable frame is +.>The sliding friction coefficient between the auxiliary rib positioning rod and the auxiliary rib positioning rod;
the movable frame is arranged on the hydraulic system to overcome the total driving force required by the static friction resistanceTotal thrust force which does not produce anticlockwise overturning than just moving +.>This is because the coefficient of static friction is larger than the coefficient of sliding friction and the coefficient of rolling friction.
A construction method for binding hydraulic formwork to a prefabricated box girder steel reinforcement framework comprises the following steps:
step one, designing and calculating a hydraulic die carrier for binding reinforcement frameworks of prefabricated box girders
(1) According to the scale of the prefabricated box girder steel reinforcement framework, binding the specific size of the hydraulic formwork structure by the primary steel reinforcement framework;
(2) test determination、、A value;
(3) calculated from the first, second and third formulas、Selecting parameters of the model, the power and the number of the hydraulic system;
(4) entrusting a professional steel member manufacturer to manufacture a steel reinforcement framework binding hydraulic die frame member;
step two, installing a prefabricated box girder reinforcement cage binding hydraulic die carrier
(1) Pouring cement concrete ground, embedding rails, a fixed base and embedded parts of a hydraulic system;
(2) the device comprises a mounting rail, a fixed base, a movable frame and a hydraulic system;
(3) debugging a hydraulic die carrier, wherein the movable frame is required to move a distance of 10 cm-20 cm away from the fixed base;
step three, installing flat stirrups, binding main reinforcements or welding firmly
(1) The semi-finished products of the main reinforcement, the auxiliary reinforcement, the flat stirrup and the vertical stirrup are customized by a reinforcement manufacturer, and the inspection quality meets the requirements;
(2) starting a hydraulic system, and separating the distance between the movable frame and the fixed base by 10 cm-20 cm;
(3) a flat stirrup is placed in the longitudinal beam positioning groove;
(4) the designed number of lower row main reinforcements penetrate through all the flat stirrups from the flat stirrups 63 at one side edge, the main reinforcements are placed in the beam positioning grooves, and the lower row main reinforcements and the lower edges of the flat stirrups are bound; placing a plurality of skids with heights smaller than that of the upper row and the lower row on the lower row of main reinforcements, and binding the upper row of main reinforcements to the upper side of the flat stirrups by passing the designed number of upper row of main reinforcements from the flat stirrups at the edge of one side through the plurality of skids and under all the flat stirrups;
(5) penetrating into the prestressed corrugated pipe of the bottom plate and binding with the flat stirrup firmly;
(6) binding auxiliary rib cushion blocks;
step four, installing the vertical stirrups and the auxiliary ribs and binding or welding firmly
(1) Starting a hydraulic system, and folding the movable frame and the fixed base;
(2) vertical stirrups are placed in the longitudinal beam positioning groove and the vertical stirrup positioning groove and are placed on the same side where the flat stirrups are placed;
(3) an inner row of auxiliary reinforcements are placed on an auxiliary reinforcement positioning rod at the lowest side, all the vertical stirrups penetrate through the vertical stirrups from the edge of one side, and the first inner row of auxiliary reinforcements are bound to the inner edges of the vertical stirrups; binding all inner row auxiliary ribs from low to high in sequence; binding all the outer auxiliary ribs from low to high in turn;
(4) penetrating a web prestress corrugated pipe and binding the web prestress corrugated pipe with the vertical stirrup firmly;
(5) binding auxiliary ribs on one row of moving frames after binding of the auxiliary ribs on the other row of moving frames is completed;
(6) binding a main rib cushion block;
step five, lifting the steel reinforcement framework out of the mould frame
(1) Checking the quality of the steel reinforcement framework, and meeting the design requirement;
(2) slowly starting a hydraulic system, and slowly separating the movable frame from the fixed base by a distance of 10 cm-20 cm;
(3) and the crane lifts the steel reinforcement framework out of the die frame, and temporarily stacks or lifts the steel reinforcement framework into the prefabricated box girder die plate.
Compared with the prior art, the utility model mainly designs the hydraulic die carrier for binding the prefabricated box girder steel reinforcement framework, wherein the two movable frames and the fixed base of the die carrier are combined, and the two movable frames are synchronously driven to move and fold or move and separate relative to the fixed base by a plurality of hydraulic systems, so that the binding and forming of the positioning steel reinforcement framework during folding are satisfied, and the steel reinforcement framework is separated during separating so as to be convenient to hang out, and the structure has the main advantages that: firstly, the structure is simple, the use is convenient, and the labor intensity of operators is reduced; secondly, the manufacturing precision of the steel reinforcement framework is greatly improved, errors are reduced, the thickness of a concrete protection layer of the box girder is guaranteed, and the durability is improved; thirdly, the hydraulic system improves the mechanization degree of the die carrier, and the die carrier is synchronously folded or separated, so that the construction is quick, and the production efficiency is greatly improved. Therefore, by designing the hydraulic formwork for binding the prefabricated box girder steel reinforcement framework and combining a corresponding construction method, the hydraulic formwork has the advantages of improving the overall construction quality of the steel reinforcement framework, enhancing the durability of the engineering structure, saving energy, reducing emission and the like, and has remarkable economic and social benefits.
Drawings
Fig. 1 is a schematic elevation view of the present utility model.
Fig. 2 is a schematic structural view of the fixing base.
Fig. 3 is a force calculation diagram of the hydraulic die carrier.
Detailed Description
Embodiments of the present utility model will be described in detail below with reference to the drawings.
1-3, 1, rail, 2, fixed base, 21, longitudinal beams, 211, longitudinal beam square steel, 212, longitudinal beam channel steel, 22, cross beams, 23, longitudinal beam positioning grooves, 24, cross beam positioning grooves, 3, moving frames, 31, vertical frames, 32, underframe, 33, top ribs, 34, auxiliary rib positioning rods, 35, vertical stirrup positioning rods, 36, vertical stirrup positioning grooves, 37, brackets, 4, moving wheels, 41, moving wheels A, 42, moving wheels B, 5, hydraulic system, 51, hydraulic rod, 6, reinforcing steel bar framework, 61, main rib, 62, auxiliary rib, 63, flat stirrup and 64.
A prefabricated box girder reinforcement cage binding hydraulic formwork and a construction method are shown in fig. 1, and mainly relate to the field of bridge construction.
The hydraulic formwork comprises two rows of tracks 1 embedded in a flat concrete ground, and movable frames 3 symmetrically arranged on the two rows of tracks respectively, wherein the two movable frames 3 can be used for binding and forming a reinforcement cage 6, and a fixed base 2 positioned below the reinforcement cage 6 is arranged between the two rows of tracks 1.
Each row of tracks 1 is formed by arranging a plurality of concave upward channel steel along the longitudinal equidistance, the channel steel is parallel to each other, every two adjacent channel steel of two rows of tracks 1 are positioned on the same axis, and a layout similar to a 'non' -shaped layout is formed after the middle fixing base 2 is combined.
The two moving frames 3 or the two rows of moving frames 3 respectively positioned at two sides of the fixed base 2 have the identical structure, so the embodiment only takes the structure of one of the moving frames 3 as an example for the detailed description, and the moving frames 3 mainly comprise a bottom frame 32 and a plurality of vertical frames 31 which are welded and fixed on the bottom frame 32 at equal intervals along the longitudinal direction; the underframe 32 is a rectangular horizontal steel truss; the shapes of the plurality of vertical frames 31 are identical, each vertical frame 31 is a right trapezoid steel truss with the lower width and the upper width, the vertical frames 31 of the two rows of moving frames 3 are oppositely arranged by trapezoid oblique sides, the bottom of each vertical frame 31 is provided with a moving wheel 4 movably arranged on the track 1, the moving wheels adopt steel wheels, the bottom of each vertical frame 31 is provided with two moving wheels 4, a moving wheel A41 is arranged close to the fixed underframe 2, a moving wheel B42 is arranged far away from the fixed underframe, namely the moving wheel A and the moving wheel B are designed at the bottom of the vertical frame 31 according to the inner and outer positions, the width of each moving wheel 4 is 1-2 mm smaller than the width of the track 1, and lubricant is smeared in the track 1; a plurality of auxiliary rib positioning rods 34 which are equidistantly arranged along the height direction are arranged in each vertical frame 31.
The top parts of the plurality of vertical frames 31 are provided with top ridges 33 which are connected to form one side of the movable frame 3, and the other side of the movable frame is symmetrically arranged with the fixed base 2; the auxiliary reinforcement positioning rods 34 with equal height at the middle parts of the vertical frames 31 are provided with the connected vertical stirrup positioning rods 35, the vertical stirrup positioning rods are provided with a plurality of vertical stirrup positioning grooves 36 which are equidistantly arranged along the length direction of the vertical stirrup positioning rods 35, the number of the vertical stirrup positioning grooves 36 is the same as that of the longitudinal beam positioning grooves 23, and each vertical stirrup positioning groove 36 is semicircular and can be used for positioning the vertical stirrups 64 of the reinforcement cage 6.
The steel reinforcement framework 6 consists of a main reinforcement 61, auxiliary reinforcements 62, flat stirrups 63 and vertical stirrups 64, and is customized by a steel reinforcement manufacturing factory, wherein the main reinforcement 61 is longitudinally divided into an upper row and a lower row along the fixed base 2, the trapezoidal flat stirrups 63 are wrapped and fixedly bound, the auxiliary reinforcements 62 are horizontally arranged in two rows inside and outside the vertical frame 31, the diameter of each auxiliary reinforcement 62 is smaller than that of the main reinforcement 61, the parallelogram vertical stirrups 64 are wrapped and bound, and the number and the diameter of the flat stirrups 63 and the vertical stirrups 64 are the same; the main reinforcement 61, the auxiliary reinforcement 62, the flat stirrup 63 and the vertical stirrup 64 are positioned, bound or welded by a hydraulic formwork binding of the prefabricated box girder steel reinforcement to form a steel reinforcement framework 6, and are hung into a prefabricated box girder formwork to perform next procedures such as concrete pouring.
The fixed base 2 is a steel truss which is horizontally arranged as shown in fig. 2, and comprises two longitudinal beams 21 which are parallelly embedded on the cement concrete ground, and a plurality of cross beams 22 which are arranged between the two longitudinal beams 21 and are longitudinally and equidistantly arranged, wherein the plurality of cross beams 22 are mutually parallel; each longitudinal beam 21 is composed of square steel 211 and longitudinal beam channel steel 212 which is overlapped and fixed on the square steel and is concave upwards; the square steel 211 is longitudinally provided with a plurality of sections, and a longitudinal beam opening 213 for installing the hydraulic system 5 is reserved between every two adjacent sections of square steel 211; the inner side wall of the longitudinal beam channel 212 is provided with a plurality of longitudinal beam positioning grooves 23 which are equidistantly arranged along the length direction of the longitudinal beam channel 212, each longitudinal beam positioning groove 23 is square and can be used for positioning the vertical stirrup 64 and the flat stirrup 63 of the reinforcement cage 6, the square longitudinal length of the longitudinal beam positioning groove 23 is the sum of the outer diameters of the vertical stirrup 64 and the flat stirrup 63, and the square depth is the radius of the vertical stirrup 64 and the flat stirrup 63; each cross beam 22 is made of steel plates, the height of the mounted cross beams is identical to that of the longitudinal beam channel steel 212, a plurality of cross beam positioning grooves 24 are formed in the top surface of each cross beam 22 at equal intervals along the length direction of the cross beam 22, each cross beam positioning groove 24 is semicircular, and the radius of each cross beam positioning groove is identical to the outer diameter of the main rib 61.
Meanwhile, a plurality of hydraulic systems 5 are arranged and are longitudinally arranged at the lower part of the fixed base 2, the arrangement quantity of the hydraulic systems 5 is mainly selected according to the scale of the hydraulic die carrier, and each hydraulic system 5 comprises two double-acting hydraulic jacks which are combined and fixed on the cement concrete ground; therefore, the two lateral sides of each hydraulic system are respectively provided with a hydraulic rod 51, the end parts of the hydraulic rods 51 of each hydraulic jack are connected and offset with the brackets 37 fixed at the bottom of the movable frame 3, namely, the hydraulic rods 51 at the two sides of each hydraulic system 5 are respectively fixed with the two movable frames 3, and the hydraulic systems 5 are uniformly controlled by a computer, so that the two movable frames 3 are synchronously driven to relatively move and fold on the two rows of rails 1 to position the binding formation of the reinforcement cage 6, or relatively move and separate from the reinforcement cage 6, thereby facilitating the lifting of the reinforcement cage.
The total driving force of the bracket at the bottom of the movable frame 3, which is received by the hydraulic system 5, is as followsThe horizontal distance between the bracket at the bottom of the movable frame 3 and the contact point of the hydraulic rod 51 is +.>Total driving force of the hydraulic system 5 +.>Height from ground is +.>The method comprises the steps of carrying out a first treatment on the surface of the The weight of each side of the mobile frame 3 is +.>The horizontal distance between the action point and the center of the moving wheel A is vertical downwards>The method comprises the steps of carrying out a first treatment on the surface of the Each side of the movable frame 3 shares the weight of the reinforcement cage 6 as +.>The horizontal distance between the action point and the center of the moving wheel A is vertical downwards>The height from the ground is +.>The static friction resistance between the auxiliary rib positioning rod 34 is +.>Sliding friction is +.>The method comprises the steps of carrying out a first treatment on the surface of the The static friction resistance of the moving wheel A, the moving wheel B and the surface of the track 1 are respectively +.>The method comprises the steps of carrying out a first treatment on the surface of the By force balance principle, the counter force of the moving wheel A and the moving wheel B and the total driving force required by the hydraulic system 5 to overcome the static friction resistance>The moving frame 3 can only move the total driving force which does not generate capsizing +.>Calculated from the following formula:
equation one,
When the hydraulic system 5 is not started, the reaction force of the moving wheel A and the moving wheel B is that
Formula II,
When the hydraulic system 5 is started and the moving frame 3 just starts to move, the hydraulic system 5 overcomes the total driving force required by the static friction resistanceIs that
Formula III,
After the hydraulic system 5 is started, the total thrust of the hydraulic system 5The lower two moving frames 3 are pushed to move outwards simultaneously, the left moving frame 3 cannot rotate clockwise around the moving wheel A due to the support of the steel reinforcement framework 6, and only the counterclockwise rotation around the moving wheel B is possible, and similarly, the right moving frame 3 cannot rotate counterclockwise around the moving wheel A, only the clockwise rotation around the moving wheel B is possible, and at the moment, the two moving wheels B are separated from the track surface>The side of either side of the wheel B is +.>Get the moment, any side removes the frame and can not topple and need satisfy following formula:
in equation one, equation two, and equation three
-when the hydraulic system is not activated, the reaction force of the moving wheel a, +.>；
-when the hydraulic system is not activated, the reaction force of the mobile wheel B, +.>；
-weight of the mobile frame 3 on each side, < > j->；
The weight of the reinforcement cage 6 is shared by the movable frames 3 at each side, which is +.>；
The bracket 37 at the bottom of the mobile frame 3 is subjected to the general term of the total driving force of the hydraulic system 5,/->；
When the hydraulic system 5 is started and the mobile frame 3 just starts to move, the total driving force required by the hydraulic system 5 to overcome the static friction resistance, +.>；
After the hydraulic system 5 is started, the movable frame 3 is pushed to move outwards by the total thrust of the hydraulic system 5, and the movable frame 3 does not incline anticlockwiseTotal driving force of the cover>；
-horizontal distance of contact of the bracket 37 at the bottom of the mobile frame 3 with the hydraulic rod 51,/->；
Each side of the movable frame 3 shares the weight of the reinforcement cage 6 +.>The horizontal distance of the point of action from the centre of the mobile wheel a,；
-horizontal distance between moving wheel a, moving wheel B, +.>；
Each side of the movable frame 3 shares the weight of the reinforcement cage 6 +.>The height of the action point and the ground, +.>；
-the static friction resistance of the moving wheel a against the surface of the track 1, < ->；
-the static friction resistance of the moving wheel B against the surface of the track 1, < ->；
The weight of the steel bar framework 6 shared by each side of the movable frame 3 is +.>Friction resistance with the auxiliary rib positioning rod 34, < >>；
The weight of the steel bar framework 6 shared by each side of the movable frame 3 is +.>Sliding friction force between the auxiliary rib positioning rod 34, < >>；
Coefficient of static friction resistance between moving wheel A, moving wheel B and the surface of track 1；
The weight of the steel bar framework 6 shared by each side of the movable frame 3 is +.>The coefficient of static friction between the auxiliary rib positioning rod 34;
the weight of the steel bar framework 6 shared by each side of the movable frame 3 is +.>The sliding friction coefficient between the auxiliary rib positioning rod 34;
the movable frame 3 has the total driving force required by the hydraulic system 5 to overcome the static friction resistanceTotal thrust force which does not produce anticlockwise overturning than just moving +.>This is because the coefficient of static friction is larger than the coefficient of sliding friction and the coefficient of rolling friction.
The construction method for binding the hydraulic formwork to the steel reinforcement framework of the prefabricated box girder comprises the following steps:
step one, designing and calculating a hydraulic die carrier for binding reinforcement frameworks of prefabricated box girders
(1) According to the scale of the prefabricated box girder steel reinforcement framework, binding the specific size of the hydraulic formwork structure by the primary steel reinforcement framework;
(2) test determination、、A value;
(3) calculated from the first, second and third formulas、Selecting parameters such as the model, the power, the quantity and the like of the hydraulic system;
(4) entrusting a professional steel member manufacturer to manufacture a steel reinforcement framework binding hydraulic die frame member;
step two, installing a prefabricated box girder reinforcement cage binding hydraulic die carrier
(1) Pouring cement concrete ground, and embedding embedded parts such as a track 1, a fixed base 2, a hydraulic system 5 and the like;
(2) the device comprises a mounting rail 1, a fixed base 2, a movable frame 3 and a hydraulic system 5;
(3) debugging a hydraulic die carrier, wherein the movable frame 3 is required to move away from the fixed base by a distance of 10 cm-20 cm;
step three, installing flat stirrups, binding main reinforcements or welding firmly
(1) The semi-finished products of the main reinforcement 61, the auxiliary reinforcement 62, the flat stirrup 63 and the vertical stirrup 64 are customized by a reinforcement manufacturer, and the inspection quality meets the requirements;
(2) starting a hydraulic system 5, and separating the distance between the movable frame 3 and the fixed base by 10 cm-20 cm;
(3) a flat stirrup 63 is placed in the longitudinal beam positioning groove 23;
(4) the designed number of lower main reinforcements 61 penetrate through all the flat stirrups 63 from the flat stirrups 63 at one side edge, the main reinforcements 61 are placed in the beam positioning groove 24, and the lower main reinforcements 61 and the lower edges of the flat stirrups 63 are bound; placing a plurality of skids with heights smaller than that of an upper row and a lower row on the lower row of main reinforcements 61, and binding the upper row of main reinforcements 61 to the upper side of the flat stirrups 63 by passing the designed number of upper row of main reinforcements 61 from the inside of the flat stirrups 63 at one side edge through the plurality of skids and under all the flat stirrups 63;
(5) penetrating the bottom plate prestressed corrugated pipe and binding with the flat stirrup 63 firmly;
(6) binding auxiliary rib cushion blocks;
step four, installing the vertical stirrups and the auxiliary ribs and binding or welding firmly
(1) Starting a hydraulic system 5, and folding the movable frame 3 and the fixed base 2;
(2) vertical stirrups 64 are placed in the longitudinal beam positioning groove 23 and the vertical stirrup positioning groove 36 and on the same side where the flat stirrups 63 are placed;
(3) an inner row of auxiliary ribs 62 are placed on the lowest auxiliary rib positioning rod 34 at one side, all the vertical stirrups 64 penetrate through the vertical stirrups 64 from the edge of one side, and the first inner row of auxiliary ribs 62 are bound to the inner side of the vertical stirrups 64; binding all inner row auxiliary ribs 62 from low to high in sequence; binding all the outer row auxiliary ribs 62 from low to high in turn in the same way;
(4) penetrating the web prestress corrugated pipe and binding the web prestress corrugated pipe with the vertical stirrup 64 firmly;
(5) binding the auxiliary ribs 62 on one row of the moving frames 3, and binding the auxiliary ribs 62 on the other row of the moving frames 3;
(6) binding a main rib cushion block;
step five, lifting the steel reinforcement framework out of the mould frame
(1) Checking the quality of the steel reinforcement framework 6, and meeting the design requirement;
(2) slowly starting the hydraulic system 5, and slowly separating the movable frame 3 from the fixed base 2 by a distance of 10 cm-20 cm;
(3) the crane lifts the reinforcement cage 6 out of the formwork and temporarily stacks or lifts the reinforcement cage into the prefabricated box girder formwork.
The examples of the present utility model are only for illustrating the present utility model and are not intended to limit the scope of the present utility model. It is also to be understood that various changes and modifications may be made by one skilled in the art after reading the teachings of the utility model, and that such equivalents are intended to fall within the scope of the utility model as defined in the appended claims.

Claims (4)

1.一种预制箱梁钢筋骨架绑扎液压模架，包括两排安装在地面上的轨道(1)和分别对称安装在两排轨道上的移动架(3)，在两个移动架(3)之间用于钢筋骨架(6)绑扎成型，其特征在于所述的两排轨道(1)之间设有位于钢筋骨架(6)下方的固定底座(2)，该固定底座下部设有多个沿纵向安装的液压系统(5)，每个液压系统的横向两侧分别设有液压杆(51)，且每个液压系统(5)两侧的液压杆(51)分别与两个移动架(3)固定；所述的多个液压系统(5)同步驱动两个移动架(3)在两排轨道(1)上相对移动合拢而定位所述钢筋骨架(6)绑扎成型，或相对移动分离而脱离所述钢筋骨架(6)；所述的固定底座(2)为水平设置的钢质桁架，包括两根平行埋置在水泥混凝土地面上的纵梁(21)、以及多根设置在两根纵梁(21)之间并沿纵向等距安装的横梁(22)，该多根横梁(22)相互平行；每根所述的纵梁(21)均是由方钢(211)和叠合固定在方钢上且凹形朝上的纵梁槽钢(212)构成，该纵梁槽钢(212)的内侧壁上设有多个沿纵梁槽钢(212)长度方向等距设置的纵梁定位槽(23)；所述的方钢(211)沿纵向设有多段，每相邻两段方钢(211)之间均留有供所述液压系统(5)安装的纵梁开口(213)；每根所述的横梁(22)均为钢板，且横梁(22)安装后的高度与纵梁槽钢(212)高度相同，每根横梁(22)的顶面均设有多个沿横梁(22)长度方向等距设置的横梁定位槽(24)；每个所述的移动架(3)均包括底架(32)和多个沿纵向等距固定在底架(32)上的立架(31)，该底架(32)为水平钢桁架，每个立架(31)均呈下宽上窄的直角梯形状钢质桁架，每个立架(31)底部均设有移动安装在轨道(1)上的移动轮(4)，每个立架(31)内均设有多根沿高度方向等距设置的副筋定位杆(34)；多个立架(31)顶部设有顶楞(33)相连，多个立架(31)中部等高的副筋定位杆(34)之间设有相连的立箍筋定位杆(35)，该立箍筋定位杆上设有多个沿立箍筋定位杆(35)长度方向等距设置的立箍筋定位槽(36)，且立箍筋定位槽与纵梁定位槽(23)的数量相同；每个所述的液压系统(5)均包括两个合并而成并固定在水泥混凝土地面上的双作用液压千斤顶，每个液压千斤顶的液压杆(51)端部均与移动架(3)底部固定的托架(37)连接相抵，多个液压系统(5)由计算机统一控制；所述的移动轮(4)为钢质轮，每个立架(31)底部均设有两个移动轮(4)，且靠近固定底座(2)为移动轮A(41)，远离固定底座(2)为移动轮B(42)，每个移动轮(4)的宽度均比轨道(1)的宽度小1mm～2mm，在轨道(1)内涂抹润滑剂；所述的移动架(3)底部的托架(37)受到液压系统(5)的总驱动力为F，移动架(3)底部的托架(37)与液压杆(51)接触相抵处的水平距离为a1，液压系统(5)的总驱动力F与地面的高度为h；每侧移动架(3)的重量为Nj，垂直向下，作用点与移动轮A(41)中心的水平距离为a3；每侧移动架(3)分担钢筋骨架(6)的重量为Ng，垂直向下，作用点与移动轮A(41)中心的水平距离为a2，与地面的高度为h1，与副筋定位杆(34)之间的静摩阻力为Pgjm＝kgjNg、滑动摩阻力为Pghm＝kghNg；移动轮A(41)、移动轮B(42)与轨道(1)表面的静摩阻力分别为PAjm＝kljNA，PBjm＝kljNB；由力的平衡原理，移动轮A(41)、移动轮B(42)的反力以及液压系统(5)克服静摩阻力所需的总驱动力Fj、移动架(3)只能移动不产生倾覆的总驱动力Fh，由如下公式计算：1. A hydraulic formwork for binding the reinforcing steel skeleton of a precast box girder, comprising two rows of rails (1) installed on the ground and movable frames (3) symmetrically installed on the two rows of rails, wherein the two movable frames (3) are used for binding the reinforcing steel skeleton (6) between them, characterized in that a fixed base (2) is provided between the two rows of rails (1) and located below the reinforcing steel skeleton (6), wherein the fixed base is provided with a plurality of hydraulic systems (5) installed longitudinally at its lower part, wherein each hydraulic system is provided with hydraulic rods (51) on both sides of its transverse direction, and the hydraulic rods (51) on both sides of each hydraulic system (5) are fixed to the two movable frames (3) respectively; the plurality of hydraulic systems (5) synchronously drive the two movable frames (3) to move relative to each other on the two rows of rails (1) to close and position the reinforcing steel skeleton (6) for binding, or to move relative to each other to separate and detach from the reinforcing steel skeleton (6); the fixed base (2) is horizontally arranged. The steel truss includes two parallel longitudinal beams (21) embedded in the cement concrete ground, and multiple transverse beams (22) installed between the two longitudinal beams (21) and equidistantly along the longitudinal direction. The multiple transverse beams (22) are parallel to each other. Each of the longitudinal beams (21) is composed of square steel (211) and longitudinal beam channel steel (212) stacked and fixed on the square steel with the concave side facing upward. The inner side wall of the longitudinal beam channel steel (212) is provided with multiple longitudinal beam channels. The channel steel (212) has longitudinal beam positioning grooves (23) evenly spaced along its length; the square steel (211) has multiple segments along its longitudinal direction, and each pair of adjacent square steel segments (211) has a longitudinal beam opening (213) for the installation of the hydraulic system (5); each of the crossbeams (22) is a steel plate, and the height of the crossbeam (22) after installation is the same as the height of the longitudinal beam channel steel (212), and the top surface of each crossbeam (22) has multiple positioning grooves (23) along the crossbeam (212). 22) Equivalently spaced beam positioning slots (24) along the length direction; each of the aforementioned movable frames (3) includes a base frame (32) and multiple uprights (31) fixed equidistantly along the longitudinal direction on the base frame (32). The base frame (32) is a horizontal steel truss. Each upright (31) is a right-angled trapezoidal steel truss with a wider bottom and a narrower top. Each upright (31) has a movable wheel (4) at the bottom that is movably mounted on the track (1). Each upright (31) has multiple secondary reinforcement positioning rods (34) equidistantly spaced along the height direction. The top of the multiple uprights (31) is connected by a top rib (33). The secondary reinforcement positioning rods (34) of equal height in the middle of the multiple uprights (31) are connected by vertical stirrup positioning rods (35). The vertical stirrup positioning rods are provided with multiple vertical stirrup positioning slots (36) equidistantly spaced along the length direction of the vertical stirrup positioning rods (35). The vertical stirrup positioning slots are connected to the longitudinal beam positioning slots (23). The quantities are the same; each hydraulic system (5) includes two double-acting hydraulic jacks that are combined and fixed on the cement concrete ground. The end of the hydraulic rod (51) of each hydraulic jack is connected and abuts against the bracket (37) fixed at the bottom of the moving frame (3). Multiple hydraulic systems (5) are controlled by a computer. The moving wheels (4) are steel wheels. Each frame (31) has two moving wheels (4) at the bottom. The moving wheel A (41) is closer to the fixed base (2), and the moving wheel B (42) is further away from the fixed base (2). The width of each moving wheel (4) is 1mm to 2mm smaller than the width of the track (1). Lubricant is applied to the track (1). The total driving force F of the bracket (37) at the bottom of the moving frame (3) is the total driving force of the hydraulic system (5). The horizontal distance between the bracket (37) at the bottom of the moving frame (3) and the hydraulic rod (51) is a. 1. The total driving force F of the hydraulic system (5) is at a height of h above the ground; the weight of each side of the moving frame (3) is Nj , vertically downward, and the horizontal distance between the point of action and the center of the moving wheel A (41) is a3 ; the weight of the steel reinforcement skeleton (6) shared by each side of the moving frame (3) is Ng , vertically downward, and the horizontal distance between the point of action and the center of the moving wheel A (41) is a2 , the height above the ground is h1 , the static friction resistance between the moving frame (34) and the secondary reinforcement positioning rod is Pgjm = kgj Ng , and the sliding friction resistance is Pghm = kgh Ng ; the static friction resistance between the moving wheel A (41), the moving wheel B (42) and the surface of the track (1) is PAjm = kljNA , PBjm = kljNB respectively; according to the principle of force balance, the reaction forces of the moving wheel A (41), the moving wheel B (42) and the total driving force Fj required by the hydraulic system (5) to overcome the static friction resistance are PAjm = kljNA, PBjm = kljNB ; The total driving force Fh of the movable frame (3) that can only move without overturning is calculated by the following formula: 公式一、Formula 1 液压系统(5)未启动时，移动轮A(41)、移动轮B(42)的反力为When the hydraulic system (5) is not started, the reaction forces of the moving wheel A (41) and the moving wheel B (42) are: 公式二、Formula 2 液压系统(5)启动、移动架(3)刚开始移动时，液压系统(5)克服静摩阻力所需的总驱动力Fj为When the hydraulic system (5) starts and the moving frame (3) begins to move, the total driving force Fj required by the hydraulic system (5) to overcome static friction is: 公式三、Formula 3 液压系统(5)启动后，在液压系统(5)总推力Fh推动下两个移动架(3)同时向外侧移动，由于钢筋骨架(6)的支撑，左侧移动架(3)不会绕移动轮A顺时针转动，只可能绕移动轮B逆时针转动，同理，右侧移动架(3)不会绕移动轮A逆时针转动，只可能绕移动轮B顺时针转动，此时两侧移动轮B将脱离轨道表面NA＝0，则对任一侧移动轮B的NB取矩，任一侧移动架均不会倾覆需满足下式：After the hydraulic system (5) is started, the two moving frames (3) move outward simultaneously under the total thrust Fh of the hydraulic system (5). Due to the support of the steel frame (6), the left moving frame (3) will not rotate clockwise around the moving wheel A, but can only rotate counterclockwise around the moving wheel B. Similarly, the right moving frame (3) will not rotate counterclockwise around the moving wheel A, but can only rotate clockwise around the moving wheel B. At this time, the moving wheels B on both sides will be separated from the track surface NA = 0. Then, taking the moment NB of the moving wheel B on either side, the following equation must be satisfied so that the moving frame on either side will not overturn: 在公式一、公式二和公式三中In Formula 1, Formula 2 and Formula 3 NA——液压系统未启动时，移动轮A(41)的反力，kN；N A — The reaction force of the moving wheel A(41) when the hydraulic system is not started, kN; NB——液压系统未启动时，移动轮B(42)的反力，kN；N B — The reaction force of the moving wheel B(42) when the hydraulic system is not started, kN; Nj——每侧移动架(3)的重量，kN； Nj — weight of each side of the movable frame (3), kN; Ng——每侧移动架(3)分担钢筋骨架(6)的重量为，kN；N g ——The weight of the steel reinforcement cage (6) shared by each side of the movable frame (3) is kN; F——移动架(3)底部的托架(37)受到液压系统(5)的总驱动力的统称，kN；F—The total driving force of the support (37) at the bottom of the mobile frame (3) under the hydraulic system (5) is referred to as kN; Fj——液压系统(5)启动、移动架(3)刚开始移动时，液压系统(5)克服静摩阻力所需的总驱动力，kN； Fj — The total driving force required by the hydraulic system (5) to overcome static friction when the moving frame (3) starts moving, kN; Fh——液压系统(5)启动后，在液压系统(5)总推力推动下移动架(3)向外侧移动，移动架(3)不产生逆时针倾覆的总驱动力，kN；F h ——After the hydraulic system (5) is started, the moving frame (3) moves outward under the total thrust of the hydraulic system (5). The moving frame (3) does not generate a total driving force for counterclockwise overturning, kN; a——移动架(3)底部的托架(37)与液压杆(51)接触相抵处的水平距离，m；a——The horizontal distance, in meters, between the bracket (37) at the bottom of the movable frame (3) and the hydraulic rod (51) at their contact point; a2——每侧移动架(3)分担钢筋骨架(6)的重量Ng作用点与移动轮A(41)中心的水平距离，m；a 2 ——The weight of the steel reinforcement cage (6) shared by each side of the moving frame (3) N g is the horizontal distance between the point of action and the center of the moving wheel A (41), m; a3——移动轮A(41)、移动轮B(42)之间的水平距离，m；a 3 —— The horizontal distance between moving wheels A(41) and B(42), in meters; h1——每侧移动架(3)分担钢筋骨架(6)的重量Ng作用点与地面的高度，m；h 1 ——The weight of the steel reinforcement cage (6) shared by each side of the movable frame (3) N g is the height of the point of action from the ground, m; PAjm——移动轮A(41)与轨道(1)表面的静摩阻力，kN；P Ajm —— Static friction resistance between the moving wheel A(41) and the surface of the track (1), kN; PBjm——移动轮B(42)与轨道(1)表面的静摩阻力，kN；P Bjm —— Static friction resistance between the moving wheel B(42) and the surface of the track(1), kN; Pgjm——每侧移动架(3)分担钢筋骨架(6)的重量为Ng与副筋定位杆(34)之间的静摩阻力，kN；P gjm ——The weight of the steel reinforcement cage (6) shared by each side of the moving frame (3) is N g and the static friction resistance between the secondary reinforcement positioning rod (34) is kN; Pghm——每侧移动架(3)分担钢筋骨架(6)的重量为Ng与副筋定位杆(34)之间的滑动摩阻力，kN；P ghm ——The weight of the steel reinforcement cage (6) shared by each side of the moving frame (3) is N g and the sliding friction resistance between the secondary reinforcement positioning rod (34) is kN; klj——移动轮A(41)、移动轮B(42)与轨道(1)表面的静摩阻系数；k lj —— The static friction coefficient of the surfaces of moving wheel A (41), moving wheel B (42) and track (1); kgj——每侧移动架(3)分担钢筋骨架(6)的重量为Ng与副筋定位杆(34)之间的静摩阻系数；k gj ——The weight of the steel reinforcement cage (6) shared by each side of the moving frame (3) is N g and the static friction coefficient between the auxiliary reinforcement positioning rod (34); kgh——每侧移动架(3)分担钢筋骨架(6)的重量为Ng与副筋定位杆(34)之间的滑动摩阻系数；k gh ——The weight of the steel reinforcement cage (6) shared by each side of the moving frame (3) is N g and the coefficient of sliding friction between the secondary reinforcement positioning rod (34); 所述的移动架(3)在液压系统(5)克服静摩阻力所需的总驱动力Fj比只移动不产生逆时针倾覆的总推力Fh要大，这是因为静摩阻系数比滑动摩阻系数和滚动摩系数大。The total driving force Fj required for the moving frame (3) to overcome static friction in the hydraulic system (5) is greater than the total thrust Fh that only moves without causing counterclockwise overturning, because the static friction coefficient is greater than the sliding friction coefficient and the rolling friction coefficient. 2.根据权利要求1所述的一种预制箱梁钢筋骨架绑扎液压模架，其特征在于所述的钢筋骨架(6)包括主筋(61)、副筋(62)、平箍筋(63)和立箍筋(64)，该主筋(61)沿固定底座(2)纵向分上下两排设置，由梯形平箍筋包裹固定绑扎，该副筋(62)沿立架(31)水平分内外两排布置，副筋(62)直径小于主筋(61)，由平行四边形立箍筋包裹绑扎，平箍筋(63)与立箍筋(64)的数量和直径相同；所述的主筋(61)、副筋(62)、平箍筋(63)、立箍筋(64)经预制箱梁钢筋骨架绑扎液压模架定位、绑扎或焊接后形成钢筋骨架(6)，并吊入预制箱梁模板内进行混凝土浇筑。2. A hydraulic formwork for binding the reinforcing steel skeleton of a precast box girder according to claim 1, characterized in that the reinforcing steel skeleton (6) includes main bars (61), secondary bars (62), horizontal stirrups (63) and vertical stirrups (64). The main bars (61) are arranged in two rows along the longitudinal direction of the fixed base (2) and are fixed and bound by trapezoidal horizontal stirrups. The secondary bars (62) are arranged in two rows along the horizontal direction of the support frame (31). The diameter of the secondary bars (62) is smaller than that of the main bars (61) and is bound by parallelogram vertical stirrups. The number and diameter of the horizontal stirrups (63) and the vertical stirrups (64) are the same. The main bars (61), secondary bars (62), horizontal stirrups (63) and vertical stirrups (64) are positioned, bound or welded by the hydraulic formwork for binding the reinforcing steel skeleton of the precast box girder to form the reinforcing steel skeleton (6) and are hoisted into the precast box girder formwork for concrete pouring. 3.根据权利要求2所述的一种预制箱梁钢筋骨架绑扎液压模架，其特征在于所述的纵梁定位槽(23)为方形，用于定位钢筋骨架(6)的立箍筋(64)和平箍筋(63)，纵梁定位槽(23)的方形纵向长度为立箍筋(64)和平箍筋(63)的外直径之和，方形深度为立箍筋(64)和平箍筋(63)的半径；所述的横梁定位槽(24)为半圆形，半径与主筋(61)外径相同；所述的立箍筋定位槽(36)为半圆形，用于定位立箍筋(64)。3. A hydraulic formwork for binding precast box girder reinforcement cage according to claim 2, characterized in that the longitudinal beam positioning groove (23) is square and used to position the vertical stirrups (64) and horizontal stirrups (63) of the reinforcement cage (6), the longitudinal length of the square longitudinal beam positioning groove (23) is the sum of the outer diameters of the vertical stirrups (64) and horizontal stirrups (63), and the depth of the square is the radius of the vertical stirrups (64) and horizontal stirrups (63); the transverse beam positioning groove (24) is semi-circular and the radius is the same as the outer diameter of the main reinforcement (61); the vertical stirrup positioning groove (36) is semi-circular and used to position the vertical stirrups (64). 4.一种根据权利要求3所述的预制箱梁钢筋骨架绑扎液压模架的施工方法，其特征在于该施工方法包括如下步骤：4. A construction method for binding the precast box girder reinforcement cage using a hydraulic formwork as described in claim 3, characterized in that the construction method includes the following steps: 步骤一、设计计算预制箱梁钢筋骨架绑扎液压模架Step 1: Design and calculate the precast box girder reinforcement cage and tying the hydraulic formwork. ①根据预制箱梁钢筋骨架规模，初拟钢筋骨架绑扎液压模架结构的具体尺寸；①Based on the scale of the precast box girder steel reinforcement cage, the specific dimensions of the hydraulic formwork structure for tying the steel reinforcement cage are initially proposed; ②试验测定klj、kgj、kgh值；② The values of klj , kgj , and kgh were determined experimentally; ③由公式一、公式二和公式三计算Fj、Fh，选择液压系统(5)型号、功率、数量的参数；③ Calculate Fj and Fh using Formula 1, Formula 2 and Formula 3, and select the parameters of hydraulic system (5) model, power and quantity; ④委托专业钢构件制作厂家制作钢筋骨架绑扎液压模架构件；④ Entrust a professional steel component manufacturer to manufacture the hydraulic formwork components for reinforcing bar tying; 步骤二、安装预制箱梁钢筋骨架绑扎液压模架Step 2: Install the hydraulic formwork for binding the precast box girder reinforcement cage. ①浇筑水泥混凝土地面，预埋轨道(1)、固定底座(2)、液压系统(5)的预埋件；① Pour cement concrete floor and pre-embed the track (1), fixed base (2), and hydraulic system (5) pre-embedded parts; ②安装轨道(1)、固定底座(2)、移动架(3)、液压系统(5)；②Installation of track (1), fixed base (2), moving frame (3), and hydraulic system (5); ③调试液压模架，要求移动架(3)移动离开固定底座(2)10cm～20cm的距离；③ When adjusting the hydraulic mold frame, the movable frame (3) should be moved 10cm to 20cm away from the fixed base (2); 步骤三、安装平箍筋、主筋绑扎或电焊牢固Step 3: Install the stirrups and main reinforcement bars, and secure them firmly by tying or welding. ①主筋(61)、副筋(62)、平箍筋(63)、立箍筋(64)半成品由钢筋制作厂定制，检查质量符合要求；①The main reinforcement (61), secondary reinforcement (62), horizontal stirrups (63), and vertical stirrups (64) are semi-finished products customized by the steel bar manufacturing plant, and the quality is checked to meet the requirements; ②启动液压系统(5)，分离移动架(3)离开固定底座(2)10cm～20cm的距离；② Start the hydraulic system (5) and separate the moving frame (3) by 10cm to 20cm from the fixed base (2); ③在纵梁定位槽(23)内放置平箍筋(63)；③ Place flat stirrups (63) in the positioning groove (23) of the longitudinal beam; ④将设计数量的下排主筋(61)从一侧边缘平箍筋(63)内穿过所有平箍筋(63)，主筋(61)放置在横梁定位槽(24)内，绑扎下排主筋(61)与平箍筋(63)下边；将小于上排与下排高度的多根垫木放进下排主筋(61)之上，再将设计数量的上排主筋(61)从一侧边缘平箍筋(63)内穿过多根垫木之上与所有平箍筋(63)之下，绑扎上排主筋(61)至平箍筋(63)上边；④ Pass the designed number of bottom main bars (61) through all the horizontal stirrups (63) from one side edge. Place the main bars (61) in the positioning groove (24) of the beam and tie the bottom main bars (61) to the bottom of the horizontal stirrups (63). Place multiple wooden blocks smaller than the height of the top and bottom bars on the bottom main bars (61). Then pass the designed number of top main bars (61) through the horizontal stirrups (63) from one side edge to the top of the multiple wooden blocks and below all the horizontal stirrups (63). Tie the top main bars (61) to the top of the horizontal stirrups (63). ⑤穿入底板预应力波纹管，并与平箍筋(63)绑扎牢固；⑤ Insert the prestressed corrugated pipe into the base plate and tie it firmly with the flat stirrup (63); ⑥绑扎副筋垫块；⑥ Tie the secondary reinforcement pads; 步骤四、安装立箍筋、副筋并绑扎或电焊牢固Step 4: Install the vertical stirrups and secondary reinforcement bars and secure them by tying or welding. ①启动液压系统(5)，将移动架(3)与固定底座(2)合拢；① Start the hydraulic system (5) and close the movable frame (3) with the fixed base (2); ②在纵梁定位槽(23)和立箍筋定位槽(36)内放置立箍筋(64)，并放置在已放置平箍筋(63)的同一侧；② Place vertical stirrups (64) in the longitudinal beam positioning groove (23) and the vertical stirrup positioning groove (36), and place them on the same side as the horizontal stirrups (63) that have been placed. ③在一侧最低的一根副筋定位杆(34)上放置一根内排副筋(62)，从一侧边缘立箍筋(64)内穿过所有立箍筋(64)，绑扎第一根内排副筋(62)至立箍筋(64)内边；依次从低至高绑扎所有内排副筋(62)；同理依次从低至高绑扎所有外排副筋(62)；③ Place an inner row of secondary reinforcement bars (62) on the lowest secondary reinforcement positioning rod (34) on one side, pass through all the vertical stirrups (64) from the edge of one side, and tie the first inner row of secondary reinforcement bars (62) to the inner edge of the vertical stirrup (64); tie all the inner row of secondary reinforcement bars (62) in sequence from low to high; similarly, tie all the outer row of secondary reinforcement bars (62) in sequence from low to high; ④穿入腹板预应力波纹管，并与立箍筋(64)绑扎牢固；④ Insert the prestressed corrugated pipe into the web and tie it securely with the stirrups (64); ⑤一排移动架(3)上的副筋(62)绑扎完成后，再绑扎另一排移动架(3)上的副筋(62)；⑤ After the secondary reinforcement bars (62) on one row of movable frames (3) are tied, tie the secondary reinforcement bars (62) on another row of movable frames (3); ⑥绑扎主筋垫块；⑥ Tie the main reinforcement spacers; 步骤五、钢筋骨架起吊出模架Step 5: Lifting the steel reinforcement cage out of the formwork. ①检查钢筋骨架(6)质量，符合设计要求；①Inspect the quality of the steel reinforcement cage (6) to ensure it meets the design requirements; ②缓慢启动液压系统(5)，缓缓将移动架(3)与固定底座(2)分离10cm～20cm的距离；② Slowly start the hydraulic system (5) and slowly separate the moving frame (3) from the fixed base (2) by 10cm to 20cm; ③吊机将钢筋骨架(6)吊出模架，临时堆放或吊入预制箱梁模板内。③The crane lifts the steel reinforcement cage (6) out of the formwork and temporarily stacks it or lifts it into the precast box girder formwork.
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