CN109667228B - Straight beam type hanging basket and continuous beam cantilever pouring construction method - Google Patents
Straight beam type hanging basket and continuous beam cantilever pouring construction method Download PDFInfo
- Publication number
- CN109667228B CN109667228B CN201910068228.7A CN201910068228A CN109667228B CN 109667228 B CN109667228 B CN 109667228B CN 201910068228 A CN201910068228 A CN 201910068228A CN 109667228 B CN109667228 B CN 109667228B
- Authority
- CN
- China
- Prior art keywords
- die
- anchor device
- basket
- girder
- hanging basket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 238000005266 casting Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910003460 diamond Inorganic materials 0.000 description 6
- 239000010432 diamond Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 210000002435 tendon Anatomy 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
The invention discloses a straight girder type hanging basket and a continuous girder cantilever pouring construction method. The invention has the beneficial effects that: the continuous beam construction device can realize the common use of the continuous beam construction of the railway passenger special line with the main span of 48m to 100m, has the advantages of small main beam height, low gravity center, good stability, safe and convenient hanging basket installation, high rigidity, safety and reliability, adopts a rigid frame type rear anchor mode, combines two rear anchors of running and working states, greatly improves the anti-capsizing coefficient, and has safe, reliable, convenient and quick running state and high anti-wind safety grade.
Description
Technical Field
The invention relates to the technical field of continuous beam cantilever pouring equipment, in particular to a straight beam hanging basket and a continuous beam cantilever pouring construction method.
Background
At present, the traditional continuous beam cantilever pouring mode is provided with triangular and diamond hanging baskets, and in engineering projects in strong typhoons, the diamond hanging baskets are generally adopted. But has the disadvantage that: 1. the running track depends on the vertical prestressed tendons of the box girder, the main truss spacing is required to be adjusted according to the vertical prestressed transverse spacing, and the positions of the hanger rod pin base and the longitudinal beam of the bottom die platform and the positions of the hanger rods and the anchor rods are required to be adjusted by avoiding the longitudinal prestressed pipelines, so that the continuous girders with various spans cannot be used universally. 2. The triangle and the diamond hanging basket are connected, so that additional connecting components are needed to be added during the connection construction, the disassembly components are needed to be additionally added during the disassembly, the disassembly procedure is complex, and the potential safety hazard is extremely high. 3. The triangular or diamond hanging basket has main girders as high as 4-5 m, and two main girders are connected by a transverse connecting system to be stable. When the hanging basket is assembled, the two main trusses are required to be temporarily fixed by a plurality of chain blocks, and when the transverse connection system is hoisted, collision with the main trusses is difficult to avoid, so that the safety is critical. It is more dangerous if an instantaneous strong wind is encountered during installation. And the transverse connection system is mostly welded with the main truss on site, so that the welding quality is difficult to ensure. The straight beam type hanging basket completely avoids the potential safety hazard. 4. The triangular and rhombic basket rear anchors adopt shoulder pole beams and fine-tied threaded steel anchor rods. The finely-pricked threaded steel anchor rod is longer in length, large in tensile deformation and increased in total deformation of the hanging basket. The refined thread steel has no obvious yield point, no precursor before damage, brittle fracture, and the brittle fracture strength after fire collision is sharply reduced. In practical construction, the anchor rod is difficult to keep vertical, and the anchor device is contacted with the backing plate point, so that the anchor rod and the anchor device generate great secondary stress. The anti-overturning coefficient of the theoretical calculated ideal state is higher, but the actual state often does not reach 2.0 required by the specification, and the theoretical calculated ideal state has great potential safety hazard. 5. The outer side mould of the triangle hanging basket moves along in the process, the steel plate is placed on an outer die walking beam. The front end of the walking beam is suspended on the front upper cross beam by a refined-binding threaded steel suspender, and the rear end of the walking beam is suspended on the box beam flange plate by the refined-binding threaded steel suspender and the suspension ring. The walking beam is provided with a flexible suspender at the front and the rear. When the outer die is in a running state, the outer die can not synchronously run with the main truss and the bottom die, the hanger rod of the outer die is bent and deflected, when the hanger rod is deflected to a certain degree, the horizontal component force of the hanger rod is larger than the friction force, the outer die is in a pulse running state only when the hanger rod is in a relative movement with the rear hanger ring, and the hanger rod of the front and rear fine-tied threaded steel is repeatedly deflected and deflected. The triangular hanging basket and the diamond hanging basket have the greatest potential safety hazards, and the accident that the outer mold falls occurs.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides a straight beam type hanging basket, which is provided with L-shaped hanging legs, an outer side die can be directly placed on the rigid hanging legs, a walking beam, a front hanging rod and a rear hanging rod are omitted, and the outer side die, a bottom basket and a bottom die are ensured to walk synchronously.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the utility model provides a basket is hung to straight beam formula, includes the fixed girder of front end, sliding connection has a bottom basket on the girder, the bottom basket includes the entablature, the leg of hanging of entablature fixedly connected with die block platform and L shape respectively, set firmly centre form, outside mould and die block in the bottom basket, die block fixedly connected with on the die block platform, outside mould by the die block platform with hang the leg support.
Further, the main beam is a steel box beam.
Further, the front end of the main beam is anchored with the continuous beam after pouring is completed through a front support.
Further, the girder passes through back anchor device sliding connection the end basket, the girder runs through back anchor device, back anchor device's upper portion is provided with the gyro wheel, the top detachably of girder be provided with the slide that the gyro wheel matches, back anchor device fixed connection the entablature, fixedly connected with on the front support with the jack that back anchor device corresponds.
Further, a detachable rear anchor rod is arranged at the lower part of the rear anchor device, and a detachable rear anchor jacking cylinder is arranged between the top of the main beam and the rear anchor device.
Further, the upper cross beam is fixedly connected with the inner die, the outer die and the bottom die platform through hanging rods respectively.
Further, the suspender and the rear anchor rod are both made of Q345 round steel.
Further, the bottom of the nut of the suspender and the bottom of the nut of the rear anchor rod are both provided with spherical cushion blocks.
The invention also discloses a continuous beam cantilever pouring construction method, which comprises the following steps:
s1, after concrete pouring of a continuous beam is finished for 48 hours or after the concrete strength of a top plate of the continuous beam is not lower than 20Mpa, loosening an outer side die and an inner die to enable the outer side die to be supported on a bottom die platform and hanging legs, and installing a track;
s2, separating the bottom die from the bottom surface of the continuous beam and loosening the rear anchor device;
s3, after the rear anchor device is completely loosened, pushing the rear anchor device by using a jack so as to enable the bottom basket to move along the main beam;
s4, after the bottom basket moves in place and the central line of the bottom die is in place, fixing the rear anchor device;
s5, pushing the inner die to an accurate position;
s6, connecting the outer side die, the inner die and the bottom die, and performing next concrete pouring.
The invention has the beneficial effects that: the continuous beam construction device can realize the common use of the continuous beam construction of the railway passenger special line with the main span of 48m to 100m, has the advantages of small main beam height, low gravity center, good stability, safe and convenient hanging basket installation, high rigidity, safety and reliability, adopts a rigid frame type rear anchor mode, combines two rear anchors of running and working states, greatly improves the anti-capsizing coefficient, and has safe, reliable, convenient and quick running state and high anti-wind safety grade.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an elevation view of a straight beam cradle according to an embodiment of the present invention;
FIG. 2 is a side view of a straight beam cradle according to an embodiment of the present invention;
FIG. 3 is a front view of a main beam according to an embodiment of the present invention;
FIG. 4 is a side view of a main beam according to an embodiment of the present invention;
FIG. 5 is a front view of a rear anchor device according to an embodiment of the present invention;
FIG. 6 is a side view of a rear anchor device according to an embodiment of the present invention;
fig. 7 is a schematic view of a jack according to an embodiment of the present invention.
In the figure:
1. a main beam; 2. a front support; 3. a rear anchor device; 4. a jack; 5. an upper cross beam; 6. hanging legs; 7. a cantilever beam; 8. a bottom die platform; 9. an outer mold; 10. an inner mold; 11. and (5) end molding.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
As shown in fig. 1-7, the straight girder type hanging basket according to the embodiment of the invention comprises a girder 1 with a fixed front end, wherein a bottom basket is connected on the girder 1 in a sliding way, the bottom basket comprises an upper cross beam 5, the upper cross beam 5 is respectively and fixedly connected with a bottom mould platform 8 and L-shaped hanging legs 6, the bottom basket is internally fixedly provided with an inner die 10, an outer die 9 and a bottom die, the bottom die is fixedly connected with the bottom die platform 8, and the outer die 9 is supported by the bottom die platform 8 and the hanging legs 6.
In one embodiment of the invention, the main girder 1 is a steel box girder.
In one embodiment of the present invention, the front end of the main beam 1 is anchored to the poured continuous beam by a front support 2.
In a specific embodiment of the invention, the main beam 1 is slidably connected with the bottom basket through a rear anchor device 3, the main beam 1 penetrates through the rear anchor device 3, a roller is arranged at the upper part of the rear anchor device 3, a slideway matched with the roller is detachably arranged at the top of the main beam 1, the rear anchor device 3 is fixedly connected with the upper cross beam 5, and a jack 4 corresponding to the rear anchor device 3 is fixedly connected with the front support 2.
In a specific embodiment of the present invention, a detachable rear anchor rod is provided at the lower part of the rear anchor device 3, and a detachable rear anchor jack cylinder is provided between the top of the main beam 1 and the rear anchor device 3.
In one embodiment of the present invention, the upper beam 5 is fixedly connected to the inner mold 10, the outer mold 9 and the bottom mold platform 8 through suspension rods, respectively.
In one embodiment of the invention, the boom and the rear anchor are both made of Q345 round steel.
In one embodiment of the invention, the bottom of the nut of the boom and the bottom of the nut of the rear anchor bolt are both provided with spherical pads.
The invention also discloses a continuous beam cantilever pouring construction method, which is characterized by comprising the following steps of:
s1, after the concrete pouring of a continuous beam is finished for 48 hours or after the concrete strength of a top plate of the continuous beam is not lower than 20Mpa, loosening an outer side die 9 and an inner die 10 to enable the outer side die 9 to be supported on a bottom die platform 8 and hanging legs 6, and installing a track;
s2, separating the bottom die from the bottom surface of the continuous beam and loosening the rear anchor device 3;
s3, after the rear anchor device 3 is completely loosened, pushing the rear anchor device 3 by using a jack 4 so as to enable the bottom basket to move along the main beam 1;
s4, after the bottom basket moves in place and the central line of the bottom die is in place, fixing the rear anchor device 3;
s5, pushing the inner die to an accurate position;
and S6, connecting the outer die 9, the inner die 10 and the bottom die, and performing next concrete pouring.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes the above technical solutions of the present invention in detail by a specific usage manner.
The invention relates to a straight beam type hanging basket which comprises a main beam 1, a bottom basket, a front support 2 the rear anchor device 3, the jack 4, the inner die 10, the outer die 9, the bottom die and the like. The outer die 9 is connected with the inner die 10 through a pair of tie rods.
The bottom basket comprises an upper cross beam 5, hanging legs 6, a cantilever beam 7 and a bottom die platform 8, wherein the upper cross beam 5 is connected with the hanging legs 6 through the cantilever beam 7.
The straight beam hanging basket is not only completely universal for the bottom basket, but also the outer side mould 9 can be recycled. The outer side die 9 is provided with three tie rods with fixed positions which are universal for various beam types, meanwhile, the bottom die platform 8 is formed by a horizontal truss, the horizontal truss can provide reliable support for the outer side die 9, and the outer side die 9 can move with the bottom die platform 8 in supporting position according to the change of the beam height.
The straight beam hanging basket is connected and disconnected without any other components, and the hanging basket can be connected by itself, and the hanging basket is completely identical to the hanging basket in normal running during disconnection.
The girder 1 is made of a steel box girder with a constant section, the section height is only 1.2m, a transverse connection system is not needed, and the girder has enough stability. And the transverse connection system is mostly welded with the main truss on site, so that the welding quality is difficult to ensure. The straight beam type hanging basket completely avoids the potential safety hazard.
The girder 1 adopts a steel box girder, so that not only the vertical and transverse bending rigidity is high, but also the torsional rigidity is far greater than that of a triangle or diamond hanging basket.
The suspender and the rear anchor rod of the straight beam hanging basket are made of Q345 round steel. The Q345 steel has obvious yield point and good toughness and weldability. The spherical cushion blocks capable of automatically adjusting inclination are arranged below the nuts of the suspender and the rear anchor rod, the nuts are kept closely attached to the spherical cushion blocks, the suspender and the rear anchor rod are always in a pure tension state, the nuts are prevented from being in point contact with the cushion blocks when the suspender and the rear anchor rod incline, and great secondary stress is generated on the suspender, the rear anchor rod and the nuts.
The straight beam type hanging basket adopts a rear anchor device 3 made of a rigid frame and a rear anchor rod made of Q345 round steel, the rigid frame replaces a shoulder pole beam, the rigid frame is directly anchored on the roof of the beam, the anchoring length is short, the anchor rod performance is reliable, and the rear anchor device 3 really achieves the overturning coefficient of 6.0 by adding a spherical cushion block capable of automatically adjusting the inclination.
The walking of the straight beam type hanging basket adopts the walking state, and the walking state is safe, reliable, convenient and rapid.
The design wind speed of the straight beam type hanging basket is 33.5m/s. All basket members, templates and protection systems are required to resist class 12 typhoons without reinforcement.
The straight beam hanging basket is really completely sealed through the end mould 11. And the protection facilities are respectively arranged according to the weight and the height of the falling objects possibly occurring in each part, so that the protection safety and effectiveness are ensured. .
The jack 4 can be fixed on the front support 2, and also can be fixed on a specially arranged counterforce seat, and the counterforce seat is anchored with the beam top and fixedly connected with the main beam 1.
Hanging basket movement: 1) After the concrete pouring is finished for 48 hours or the strength of the top plate concrete is not lower than 20MPa, dismantling the counter pull rod and the suspenders on the outer side die 9 and the bottom die platform 8; removing wedge blocks between the outer side mold 9 and the horizontal truss to demold the inner and outer templates; the lower end of the inner die 10 is oppositely pulled by adopting a chain block, so that a web plate die plate of the inner die 10 is rotationally contracted, a suspender of the outer die plate 9 is loosened, namely, the outer die is loosened, and rail installation is carried out after the outer die is loosened.
2) The boom of the inner mold 10 is replaced to the front sling.
3) Removing the suspender at the middle part of the bottom die platform 8, and enabling the suspender at the rear part and the left and right sides of the bottom die platform to descend by 50mm so as to separate the bottom die from the bottom surface of the continuous beam.
4) A bolster of a jacking cylinder, a jacking cylinder and a shoulder pole beam are arranged between the continuous beam and the main beam 1, and (5) screwing the connecting bolts of the shoulder pole beam and the main beam 1. Removing a support anchor rod of the front support 2; and removing the connecting bolts of the front support 2 and the main beam 1. The jacking cylinder is jacked up, so that the bottom surface of the main beam 1 is separated from the top surface of the front support 2 by 5mm. The front support 2 is slid to the next beam section position along the main beam 1, centered and anchored. The jacking cylinder descends to enable the main beam 1 to fall on the front support 2, anchor the front support 2 and screw the connecting bolt of the front support 2 and the main beam 1.
5) The rear anchor device 3 is completely loosened, and the rear anchor jacking cylinder is jacked up, so that the rear end of the main beam 1 descends by 5mm. And installing a safety anchor rod and tightening a nut. And (5) removing the anchor rod. The rear anchor device 3 and the bottom basket synchronously slide to the rear anchor position of the next girder section along the main girder 1 through the jack 4.
6) And installing a spherical cushion block and a rear anchor rod after the bottom basket is in place and the central line of the bottom die is in place, and jacking the oil cylinder by the rear anchor rod. And the rear anchor jack cylinder is jacked up to enable the roller to be separated from the track by 5mm. And (5) dismantling the safety anchor rod.
7) Pushing the internal mold to the accurate position.
8) The hanger rods on the bottom die and the outer die 9 are installed and the bottom die reaches the design elevation.
9) And installing a wedge block between the outer die 9 and the horizontal truss, and correcting the outer die 9.
10 Mounting end dies 11, mounting box girder bottom plates and web steel bars; and installing a web prestressed pipeline. The inner mold 10 is calibrated and a pair of tie rods are installed. And installing a top plate steel bar and a prestressed pipeline. And (5) pouring concrete after the hanging basket is checked to be abnormal.
The two screw jacks of the hanging belt are required to be stably placed and placed on the body of the beam Duan Hunning soil, and the plug pad is required to be compact; the two jack axes of the support straps must be coplanar with the shoulder pole Liang Zhongxian and the point of force applied by the jack 4 cannot go beyond the shoulder pole beam stiffener.
All jack strokes of the support sling must not exceed 100mm, and the pins on the sling must be threaded with nuts and screwed into place.
The pretension force of each back sling is about 30 tons, or the jack 4 of each back sling is added with a 100cm rocker, and the pretension force of each back sling is basically consistent when a worker does not shake.
The lower end of the suspender is required to be screwed out of the screw cap by 4cm, the thickness of the screw cap is not less than 15mm, the thickness of the screw cap is not less than 150 mm or 120mm, the steel plate is required to be closely attached to the screw cap, and if welding slag is arranged on the steel plate, the steel plate can be used after being polished and flattened.
The boom pretensions with the sling.
All finish rolled deformed bars on the basket are not allowed to bend.
The construction requirements of the high-strength bolt used on the hanging basket are as follows: 1) The high-strength bolt connection pair should be lightly assembled and disassembled in the transportation and storage processes, so as to prevent threads from being damaged.
2) The high-strength bolt connection pair should be classified and stored according to the lot number and specification noted on the packaging box, and is stored indoors, so that the stacking is not too high, and rust and dirt contamination are prevented. The high-strength bolt connection pair can strictly prohibit any unpacking before installation and use.
3) Before the high-strength bolt is installed, a thin wire brush is used for removing rust and dirt on the friction surface.
4) The high-strength bolts are installed after the central positions of the structural members are adjusted, and the penetrating directions of the high-strength bolts are convenient to construct and are consistent. When the high-strength bolt connection pair is assembled, one side of the nut with the round table surface faces to one side of the gasket with the chamfer angle. When the large hexagon high-strength bolt connection pair is assembled, one side, with the chamfer angle, of the lower gasket of the bolt head faces the bolt head.
5) When the high-strength bolt is installed, forced penetration of the bolt (such as hammering) is forbidden. If the hole cannot be freely penetrated, a reamer is used for trimming, and the maximum diameter of the trimmed hole is smaller than 1.2 times of the diameter of the bolt. When repairing the hole, in order to prevent scrap iron from falling into the plate overlapping seam, all bolts around the hole should be screwed up before reaming, so that the plate is overlapped and closely attached. And (5) strictly forbidding gas cutting reaming.
6) When the high-strength bolt is installed, the friction surface of the component should be kept dry, and the component cannot work in the rain.
7) The torque wrench for the construction of the large hexagon high-strength bolt is required to be corrected before use, the torque error is not more than +/-5%, and the qualified rear part is used. The torque error of the torque wrench for correction is not more than +/-3%.
8) The tightening of the high-strength bolt with the large hexagon head is divided into primary tightening and final tightening. The large-scale node is divided into primary twisting, secondary twisting and final twisting. The primary twisting torque is about 50% of the construction torque, and the secondary twisting torque is equal to the primary twisting torque. The high-strength bolt after primary screwing or re-screwing is coated with marks by applying colors on the nut, and then final screwing is carried out according to the construction torque value provided by design. The final-screwed high-strength bolt is coated with marks on the nuts by using another medium color.
9) When the high-strength bolt with the large hexagon head is screwed down, torque is only applied to the nut.
10 When the high-strength bolts are first screwed, re-screwed and finally screwed, the bolts at the joints are screwed according to a certain sequence, and the bolts are generally screwed outwards from the center of the bolt group in sequence.
11 The primary screwing, the secondary screwing and the final screwing of the high-strength bolt are completed in the same day.
Notice that: 1) All finish rolled deformed bars should be used after being prestretched to be qualified. Reliable protection measures should be adopted in construction to prevent electric spark from touching bending.
2) The operation platform and the pavement can be additionally arranged according to construction requirements, but the weight is reduced as much as possible on the premise of safety and reliability.
3) All screws and finish rolling screw bars must be exposed to more than three threads of the nut.
4) The finish rolling screw thread reinforcing steel used for suspending the bottom basket is preferably two nuts.
5) When the operating screw rod and the finish rolling twisted steel are lifted or lowered, care should be taken to prevent the wrong operation from breaking or falling off.
6) In the weather of strong wind or thunderstorm, the hanging basket can strictly prevent the template from moving forward or lifting.
7) The rail surface of the basket moving area should be oiled and lubricated, and the shifting of the basket should be corrected in the moving process of the basket.
8) When the bottom basket moves, a person or stacked objects are forbidden on the working platform.
9) The bridge deck under the track should be leveled by adopting high-grade mortar transverse bridge direction.
10 The length of the vertical prestressed tendons of the box girder for anchoring is 22 cm from the top surface of the box girder. The vertical prestressed tendons of the box girder which are not used for anchoring are ensured to be lower than the top surface of the box girder after tensioning.
The test is used for checking the bearing capacity of the main beam 1 and the rear anchor device 3 and the pre-burying condition of the finish rolling deformed steel bars. The basket hanging test is as follows: 1) The front joint of the main beam 1 is pre-pressed by a hydraulic jack 4.
2) Five stages of loading are carried out per node: 70KN, 177KN, 282KN, 353KN and 424KN, and each stage is loaded for 15min.
3) And measuring a front node sinking value, a front supporting point sinking value and a rear supporting point lifting value of each stage of load.
In summary, by means of the technical scheme, the continuous beam for the railway passenger dedicated line with the main span of 48m to 100m can be universally used for construction, the main beam is small in height, low in gravity center, good in stability, safe and convenient to install, high in rigidity, safe and reliable, a rigid frame type rear anchor mode is adopted, two rear anchors of running and working states are combined, the anti-overturning coefficient is greatly improved, the running state is safe, reliable, convenient and rapid, and the anti-wind safety level is high.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. The straight beam type hanging basket is characterized by comprising a main beam (1) with a fixed front end, wherein a bottom basket is connected to the main beam (1) in a sliding manner, the bottom basket comprises an upper cross beam (5), the upper cross beam (5) is fixedly connected with a bottom die platform (8) and L-shaped hanging legs (6) respectively, an inner die (10), an outer die (9) and a bottom die are fixedly arranged in the bottom basket, the bottom die is fixedly connected to the bottom die platform (8), and the outer die (9) is supported by the bottom die platform (8) and the hanging legs (6);
the main beam (1) is a steel box beam; the front end of the main beam (1) is anchored with the poured continuous beam through a front support (2); the utility model discloses a rear anchor device, including back anchor device (3), girder (1), back anchor device (3), girder (1) run through back anchor device (3), the upper portion of back anchor device (3) is provided with the gyro wheel, the top detachably of girder (1) be provided with the slide that the gyro wheel matches, back anchor device (3) fixed connection entablature (5), fixedly connected with on preceding support (2) with jack (4) that back anchor device (3) corresponds, the lower part of back anchor device (3) is provided with detachable back anchor stock, girder (1) top with be provided with detachable back anchor jack-up cylinder between back anchor device (3).
2. The straight girder type hanging basket according to claim 1, wherein the upper cross beam (5) is fixedly connected with the inner mould (10), the outer mould (9) and the bottom mould platform (8) through hanging rods respectively.
3. The straight girder type hanging basket of claim 2, wherein the hanger rod and the rear anchor rod are both made of Q345 round steel.
4. The straight girder type hanging basket according to claim 2, wherein the nut bottom of the hanger rod and the nut bottom of the rear anchor rod are provided with spherical cushion blocks.
5. A continuous beam cantilever casting construction method adopting the straight beam hanging basket according to claim 1, which is characterized by comprising the following steps:
s1, after concrete pouring of a continuous beam is finished for 48 hours or after the concrete strength of a top plate of the continuous beam is not lower than 20Mpa, loosening an outer side die (9) and an inner die (10), supporting the outer side die (9) on a bottom die platform (8) and hanging legs (6), and installing a track;
s2, separating the bottom die from the bottom surface of the continuous beam and loosening the rear anchor device (3);
s3, after the rear anchor device (3) is completely loosened, pushing the rear anchor device (3) by using a jack (4) so as to enable the bottom basket to move along the main beam (1);
s4, after the bottom basket moves in place and the central line of the bottom die is in place, fixing the rear anchor device (3);
s5, pushing the inner die to an accurate position;
s6, connecting the outer side die (9), the inner die (10) and the bottom die, and performing next concrete pouring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068228.7A CN109667228B (en) | 2019-01-24 | 2019-01-24 | Straight beam type hanging basket and continuous beam cantilever pouring construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068228.7A CN109667228B (en) | 2019-01-24 | 2019-01-24 | Straight beam type hanging basket and continuous beam cantilever pouring construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109667228A CN109667228A (en) | 2019-04-23 |
| CN109667228B true CN109667228B (en) | 2024-02-02 |
Family
ID=66149725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910068228.7A Active CN109667228B (en) | 2019-01-24 | 2019-01-24 | Straight beam type hanging basket and continuous beam cantilever pouring construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109667228B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112900287B (en) * | 2021-03-11 | 2023-01-24 | 中铁十六局集团第五工程有限公司 | Cantilever perfusion bridge fabrication machine |
| CN115821769A (en) * | 2022-11-28 | 2023-03-21 | 中铁四局集团有限公司 | Variable cross-section intelligent bridge fabrication machine |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH500340A (en) * | 1966-05-18 | 1970-12-15 | Polensky & Zoellner | Method and device for the construction of the superstructures of a multi-span bridge in sections from reinforced or prestressed concrete |
| JP2001348816A (en) * | 2000-06-12 | 2001-12-21 | Ps Corp | Installing method and device of precast segment overhanging installing bridge |
| CN2732820Y (en) * | 2005-04-21 | 2005-10-12 | 路桥集团第二公路工程局 | Main truss cradle rear-anchor switching device |
| CN1916289A (en) * | 2006-08-28 | 2007-02-21 | 杨秋利 | Diamond shaped cradle in truss type |
| CN101148861A (en) * | 2007-06-06 | 2008-03-26 | 宏润建设集团股份有限公司 | Beret truss type hanging basket and assembling method thereof |
| CN101672013A (en) * | 2009-08-27 | 2010-03-17 | 孙广喜 | Cable-stayed bailey hanging bracket without balance weight |
| CN101672015A (en) * | 2009-08-27 | 2010-03-17 | 孙广喜 | Multi-anchor rod hydraulic anchor device |
| CN102174796A (en) * | 2011-04-06 | 2011-09-07 | 湖南中铁五新钢模有限责任公司 | Cantilever casting construction cradle with underlaid main truss |
| CN104631343A (en) * | 2015-02-15 | 2015-05-20 | 河海大学 | Self-travelling diamond-shaped pin-connected truss-type form traveler structure and form traveler travelling and constructing method |
| CN105839549A (en) * | 2016-05-20 | 2016-08-10 | 中国水利水电第十工程局有限公司 | Truss type cantilever construction hanging basket |
| CN207944360U (en) * | 2017-11-30 | 2018-10-09 | 中铁大桥局集团第二工程有限公司 | A kind of double width cantilever casting beam Hanging Basket bed die system longitudinal and lateral movement wheel platform |
| CN207987783U (en) * | 2018-01-02 | 2018-10-19 | 中交路桥建设有限公司 | A kind of middle cross beam suspension system of suspended pouring construction hanging basket |
| CN210288145U (en) * | 2019-01-24 | 2020-04-10 | 中铁十六局集团第五工程有限公司 | Straight beam type hanging basket |
-
2019
- 2019-01-24 CN CN201910068228.7A patent/CN109667228B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH500340A (en) * | 1966-05-18 | 1970-12-15 | Polensky & Zoellner | Method and device for the construction of the superstructures of a multi-span bridge in sections from reinforced or prestressed concrete |
| JP2001348816A (en) * | 2000-06-12 | 2001-12-21 | Ps Corp | Installing method and device of precast segment overhanging installing bridge |
| CN2732820Y (en) * | 2005-04-21 | 2005-10-12 | 路桥集团第二公路工程局 | Main truss cradle rear-anchor switching device |
| CN1916289A (en) * | 2006-08-28 | 2007-02-21 | 杨秋利 | Diamond shaped cradle in truss type |
| CN101148861A (en) * | 2007-06-06 | 2008-03-26 | 宏润建设集团股份有限公司 | Beret truss type hanging basket and assembling method thereof |
| CN101672013A (en) * | 2009-08-27 | 2010-03-17 | 孙广喜 | Cable-stayed bailey hanging bracket without balance weight |
| CN101672015A (en) * | 2009-08-27 | 2010-03-17 | 孙广喜 | Multi-anchor rod hydraulic anchor device |
| CN102174796A (en) * | 2011-04-06 | 2011-09-07 | 湖南中铁五新钢模有限责任公司 | Cantilever casting construction cradle with underlaid main truss |
| CN104631343A (en) * | 2015-02-15 | 2015-05-20 | 河海大学 | Self-travelling diamond-shaped pin-connected truss-type form traveler structure and form traveler travelling and constructing method |
| CN105839549A (en) * | 2016-05-20 | 2016-08-10 | 中国水利水电第十工程局有限公司 | Truss type cantilever construction hanging basket |
| CN207944360U (en) * | 2017-11-30 | 2018-10-09 | 中铁大桥局集团第二工程有限公司 | A kind of double width cantilever casting beam Hanging Basket bed die system longitudinal and lateral movement wheel platform |
| CN207987783U (en) * | 2018-01-02 | 2018-10-19 | 中交路桥建设有限公司 | A kind of middle cross beam suspension system of suspended pouring construction hanging basket |
| CN210288145U (en) * | 2019-01-24 | 2020-04-10 | 中铁十六局集团第五工程有限公司 | Straight beam type hanging basket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109667228A (en) | 2019-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104213508B (en) | A kind of method utilizing stull and external tendon to control king-post displacement | |
| CN104141383A (en) | Bailey beam suspension formwork supporting system and construction method thereof | |
| CN203947771U (en) | A kind of Bailey beam pendent form support system | |
| CN101858163B (en) | Method for installing flare tower frame in bulk | |
| CN103911957A (en) | Prestressed continuous box-girder cantilever construction basket | |
| CN109667228B (en) | Straight beam type hanging basket and continuous beam cantilever pouring construction method | |
| CN205012666U (en) | High altitude steel construction vestibule integrally lift up support structure | |
| CN107060070A (en) | Load transfer device and the construction method that steel vestibule is lifted with the device | |
| CN110965470A (en) | Main tower cross brace structure system capable of bearing three-way load and construction method | |
| CN112324131B (en) | One-frame dual-purpose large-span stiff beam construction structure and construction method thereof | |
| CN110700119A (en) | Upper traveling system of assembled Bailey beam hanging basket and design method thereof | |
| CN111456422A (en) | Belt supporting device and method for conical steel truss on top of sliding-form silo of squat silo wall | |
| CN210288145U (en) | Straight beam type hanging basket | |
| CN101195986B (en) | Cantilever casting continuous beam temporary support concretion system for passenger special line | |
| CN104278628B (en) | A kind of light hanging basket being applicable to bridge machinery and maintenance activity | |
| CN102926330A (en) | Installation method of hanging basket suitable for bridge construction | |
| CN114086473B (en) | High pier cast-in-situ beam bracket and construction method thereof | |
| CN215925647U (en) | Arch rib buckle cable anchoring beam for tower buckle integration | |
| CN212077660U (en) | Large-span wide width bridge girder rhombus hanging basket construction structure | |
| CN201151872Y (en) | Passenger transport special railway line suspended casting continuous beam temporary support consolidation system | |
| CN204401454U (en) | A kind of light hanging basket being applicable to bridge machinery and maintenance activity | |
| CN102003070A (en) | Construction method of suspending scaffold | |
| CN106245531A (en) | Steel structural bridge installation method is hung under bilateral derrick type | |
| CN207419287U (en) | A kind of steel construction combined member for being used to replace bridge pad | |
| CN206233119U (en) | The cradle structure of antidumping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |