CN108867406B - Construction method suitable for quick positioning of closure section of through-type hanging basket - Google Patents
Construction method suitable for quick positioning of closure section of through-type hanging basket Download PDFInfo
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- CN108867406B CN108867406B CN201810610653.XA CN201810610653A CN108867406B CN 108867406 B CN108867406 B CN 108867406B CN 201810610653 A CN201810610653 A CN 201810610653A CN 108867406 B CN108867406 B CN 108867406B
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- hanging basket
- main truss
- cross beam
- template
- cradle
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- 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
Abstract
The invention belongs to the technical field of construction of a lower pressure bearing type hanging basket, and aims to solve the problems that when a closure section of a lower bearing type hanging basket is constructed, the hanging basket cannot be moved in place at one time and is accurately and quickly positioned; the rear end of a main truss of the through hanging basket is provided with traveling wheels closely attached to the bottom surface of the flange plate of the continuous beam body, and two sides of a rear upper beam of the through hanging basket are provided with two sets of sliding seats capable of sliding forwards along the sliding grooves. Meanwhile, a suspension bottom die system is additionally arranged at the front lower beam of the through hanging basket, the suspension bottom die system is directly suspended by the main truss through the pre-buried holes, the front upper beam can be directly and independently removed, and the hanging basket bottom die system can be used for completing construction of a closure section at one time without being removed.
Description
Technical Field
The invention belongs to the technical field of construction of a lower bearing type hanging basket, and particularly relates to a construction method suitable for quick positioning of a closure section of a lower bearing type hanging basket.
Background
The hanging basket cantilever casting construction is also called Dividak construction, and the cantilever casting method is most widely applied due to the advantages that the hanging basket construction structure is simple, the stress is reasonable, the hanging basket can be moved in place at one time, and a support does not need to be erected to prevent clearance under a bridge and normal traffic. The hanging baskets as main equipment for construction by a suspension irrigation method are developed into various types, common rhombic hanging baskets and triangular hanging baskets are mainly used and are based on the structural principle of a top-supported hanging basket, and the use of the bottom-supported hanging baskets is rare in terms of the application of the hanging baskets in the construction of continuous beams at present. The bottom die and the internal die suspension system of the through hanging basket are adjusted and fixed by arranging the cross beam above the front end of the main truss, the height of the cross beam is basically consistent with that of a beam top plate, when a closure section is constructed, the cross beam can move forwards only by hanging the basket after being detached, the bottom die system is also detached when the cross beam is detached, and the closure section template is assembled again, so that time and labor are wasted, and the precision positioning difficulty is increased. The upper supporting type hanging basket positions the side die by adjusting the finish-rolled threaded steel of the external beam, and the lower supporting type hanging basket can accurately position the side die of the hanging basket only by adjusting the anchoring point of the upper beam and the rear fulcrum of the main truss. The problem that the design of the hanging basket needs to be solved is solved by means of one-time folding of the hanging basket and shortening of accurate and quick positioning time of a template.
Disclosure of Invention
The invention provides a closure section construction improvement method and a hanging basket quick positioning auxiliary device, and aims to solve the problems that a hanging basket cannot be moved in place at one time and is accurately and quickly positioned when a closure section of a through hanging basket is constructed.
The invention adopts the following technical scheme:
a construction method suitable for quick positioning of closure sections of a lower-bearing hanging basket is characterized in that after two adjacent continuous beam sections are cast, the lower-bearing hanging basket is integrally moved forwards by using a sliding chute, then the closure sections are constructed, and the sliding chute is fixed on the beam surface of the cast continuous beam; the rear end of a main truss of the lower support type hanging basket is provided with a traveling wheel closely attached to the bottom surface of a flange plate of the continuous beam body, and two sides of a rear upper beam of the lower support type hanging basket are provided with two sets of sliding seats capable of sliding forwards along the sliding grooves.
The end head of the main truss of the through-type hanging basket and the corresponding position of the front upper cross beam are provided with pre-embedded holes, the suspension bottom die system is additionally arranged at the front lower cross beam of the through-type hanging basket, the suspension bottom die system is directly suspended by the main truss through the pre-embedded holes, the front upper cross beam can be directly and independently removed, and the construction of a closure section can be completed at one time without removing the hanging basket bottom die system.
The overall forward moving process of the lower hanging basket comprises the following steps:
moving the sliding chute forwards to a poured finished section, and fixing the sliding chute on the top surface of the poured continuous beam by using expansion bolts;
loosening the fixed support of the inner and outer templates, loosening the fixed screw top at the rear part of the main truss, and enabling the front end of the lower bearing type hanging basket to be separated from the beam body by the walking wheels to be in contact with the beam body and the main truss according to the balance type stress principle;
placing a jack at the bottom of the rear upper crossbeam, gradually loosening the finish-rolled deformed steel bars on two sides of the fixed rear upper crossbeam, taking out a pad beam below the rear upper crossbeam, separating the rear part of the outer die template from the beam body, recovering and supporting the hydraulic jack, enabling the cradle to fall on the chute integrally, and completing the conversion of template separation and cradle stress system;
and taking out the upper cross beam to fix the finish rolling deformed steel bar, utilizing a hydraulic jack to enable the cradle to slide forwards, after the cradle slides to the next section, installing a pad beam at the support of the upper cross beam, penetrating the finish rolling deformed steel bar, adjusting the finish rolling deformed steel bar and the screw top of the main truss to position the cradle template, using the front upper cross beam to suspend the bottom die system and the template supporting system to adjust the template in place, completing the integral translation and template fixation of the cradle, and performing section reinforced concrete construction.
The main truss of the through type hanging basket and the rear upper cross beam form an integral suspension system by adopting a C-shaped hook method, and a hydraulic jack for adjusting the left and right C-shaped hooks is arranged between the main truss and the C-shaped hooks.
The invention can effectively solve the problem that because the lower bearing type hanging basket is in structural design, the front upper cross beam of the hanging basket conflicts with the top plate of the beam body segment, and the hanging basket cannot be moved in place at one time during the construction of a closure section, a rod piece of the front upper cross beam and a bottom die system must be dismantled, and the construction efficiency is greatly reduced; the hanging basket bottom die system needs to be installed again after being dismantled, so that the difficulty of hoisting, fixing and accurately positioning the template system again is increased, and the stability of the hanging basket is reduced; by adopting the advanced hydraulic auxiliary device, the problems of the traveling and positioning accuracy, the working efficiency and the like of the cradle are solved, and the self structural safety and the whole construction working efficiency of the cradle are improved.
The invention has the following characteristics:
firstly, the method comprises the following steps: an automatic hydraulic system is added at the positions of the hanging basket main truss and the C-shaped groove, so that the hanging basket and the template are accurately and quickly positioned;
secondly, the method comprises the following steps: reserved holes are additionally formed in the positions of the front upper cross beam and the main truss of the hanging basket main truss, and a bottom die suspension system is additionally arranged at the corresponding position of the front lower cross beam, so that the bottom die system can smoothly pass through the closure section without being detached to carry out closure section construction.
Drawings
FIG. 1 is a schematic side view of a precise and quick positioning device according to the present invention;
FIG. 2 is a front view of a precise and quick positioning device according to the present invention;
FIG. 3 is a modified front side of a lower pressure-bearing cradle closure device;
FIG. 4 is a flow chart of a construction process of the through type hanging basket;
in the figure: 1-rear upper beam, 2-C-shaped hook, 3-front upper beam, 4-continuous beam body, 5-pad beam, 6-main truss, 7-front lower beam suspension system, 9-traveling wheel, 10-main truss screw jack, 11-main truss hydraulic jack, 12-C-shaped hook screw jack, 13-C-shaped hook hydraulic jack, 14-chute, 16-bottom die and 17-rear lower beam suspension system.
Detailed Description
The invention relates to a main principle and a method:
1) the lower supporting type hanging basket adopts a balance type fixing principle, a walking wheel is arranged at the rear end of a main truss and closely attached to the bottom surface of the flange of a beam body, and two sets of sliding seats are arranged on two sides of a rear upper cross beam and slide forwards through sliding grooves. When the hanging basket integrally moves forwards, the problem of deviation of the hanging basket due to asynchronous walking is easily caused, and the guide sliding groove is arranged below the sliding seat to guide the walking of the hanging basket, so that the hanging basket can accurately move forwards. The hanging basket is assembled, pre-pressed and qualified after inspection and acceptance, and after a beam body section is poured, the hanging basket is pushed forwards to carry out the construction of the next section. Moving the chute forward to a poured finished section, and anchoring the chute to a poured beam surface by using an expansion bolt; loosening the fixed supports of the inner and outer templates; a screw top is fixed at the rear part of the loose main truss, and is contacted with the beam body by a traveling wheel, and the front end of the hanging basket is separated from the beam body by the main truss according to the balance type stress principle; and placing a jack at the bottom of the rear upper crossbeam, gradually loosening the finish-rolled deformed steel bars on two sides of the fixed rear upper crossbeam, taking out the backing beam below the rear upper crossbeam, separating the rear part of the template from the beam body, recovering the supporting hydraulic jack, enabling the whole cradle to fall on the chute position, and completing the conversion of template separation and cradle stress system.
2) And taking out the upper cross beam to fix the finish rolling deformed steel bar, utilizing a hydraulic jack to enable the cradle to slide forwards, after the cradle slides to the next section, installing a pad beam at the support of the upper cross beam, penetrating the finish rolling deformed steel bar, adjusting the finish rolling deformed steel bar and the screw top of the main truss to position the cradle template, adjusting the template in place by using a front upper cross beam suspension system and a template support system, completing the integral translation and template fixation of the cradle, and performing section reinforced concrete construction.
Two devices are added in the aspects of travelling and positioning of the cradle, so that the accurate positioning efficiency of the cradle is improved, and the cradle can be folded at one time.
(1) Accurate and rapid positioning of hanging basket
Due to the action principle of the through hanging basket, the hanging basket traveling line is provided with the fixed sliding groove, the hanging basket moves forwards according to the positioning sliding groove, the traveling speed is high, the hanging basket deviation is not easy to occur, the sliding groove fixing method is simple, the distance between the front and the rear of laying can be flexibly adjusted, and the hanging basket can be repeatedly used; after the hanging basket runs in place, the rear end of the section side mold is positioned by adjusting the finish rolling deformed steel bar of the upper cross beam, the front end of the side mold is adjusted by a screw top at the rear of the main truss to realize positioning, the screw top at the rear is contacted with the beam body, and when the side mold is screwed out, the side mold is adjusted in a stressed state, so that an operator screws out the screw top, time and labor are wasted, the work efficiency is low, a hydraulic jack is added near the screw top of the main truss, the jack is firstly used for jacking, adjusting and positioning, the screw top is adjusted under no load, the hydraulic jack returns to be stressed by the screw top after the front end of the template is adjusted and positioned, and the positioning of the side mold can be quickly completed; the main truss of the lower support type hanging basket and the rear upper cross beam form an integral suspension system by adopting a C-shaped hook method, the hanging basket can have the problem of left and right deviation when running, the adjustment is carried out by screw rods at two sides behind the C-shaped hook, the manual adjustment work efficiency is low, a hydraulic jack is additionally arranged between the main truss and the C-shaped groove, the quick adjustment of the left and right C-shaped hooks can be realized, and the principle is the same as that of a side mold fixing method. The spiral top device that former string basket set up, it is at the jacking with roll back the during operation, go on under the bearing state by the manual work, adjustment spiral work efficiency is low, the torsion member that the during operation used needs to extend, the operation range is big, the operation space is limited, the activity duration is prolonged relatively, the operation personnel receive activity space and activity duration's influence, the security reduces thereupon, add hydraulic pressure auxiliary device, can accomplish the spiral top in short time and unscrew (retrieve) the operation, time saving and labor saving, the raising efficiency is safe with the operation personnel.
(2) Improved device for closure section
The adjustment and fixation of the bottom die of the through-type cradle are completed through a suspension system of a front upper cross beam of a main truss and are influenced by the design principle of the through-type cradle, the problem that the front upper cross beam of the cradle is intersected with a side span cast-in-place beam during closure section construction inevitably exists, so that the cradle cannot directly pass through a cast-in-place section during closure section construction, the front upper cross beam must be disassembled, the cradle can move forwards, the bottom die system of the cradle is disassembled along with the disassembly of the front upper cross beam, and meanwhile, the whole deviation of the cradle is easily caused by the disassembly of a rod piece, so that the difficulty of adjustment and reset of the cradle is increased, and the safety performance of construction operation is reduced; holes are pre-buried in the corresponding positions of the end of the main truss and the front upper cross beam, a suspension bottom die system is additionally arranged at the front lower cross beam, the bottom die system is directly suspended by the main truss, the holes are reserved in advance during rod piece design and processing, the front upper cross beam can be directly and independently removed, and the construction of a closure section can be completed at one time without removing the hanging basket bottom die system. The hanging basket has the advantages that the whole structure is stable, the dismounting procedures are reduced, the construction efficiency is improved, and the safety risk of rod piece dismounting is reduced.
Claims (2)
1. A construction method suitable for quick positioning of closure sections of a lower-support hanging basket is characterized in that after two adjacent continuous beam sections are cast, the lower-support hanging basket is integrally moved forwards by using a sliding groove, then the closure sections are constructed, and the sliding groove is fixed on the beam surface of the cast continuous beam; the rear end of a main truss of the lower support hanging basket is provided with a traveling wheel closely attached to the bottom surface of the flange plate of the continuous beam body, and two sides of a rear upper beam of the lower support hanging basket are provided with two sets of sliding seats capable of sliding forwards along the sliding grooves;
the overall forward moving process of the lower hanging basket comprises the following steps:
moving the sliding chute forwards to a poured finished section, and fixing the sliding chute on the top surface of the poured continuous beam by using expansion bolts;
loosening the fixed support of the inner and outer templates, loosening the fixed screw top at the rear part of the main truss, and enabling the front end of the lower bearing type hanging basket to be separated from the beam body by the walking wheels to be in contact with the beam body and the main truss according to the balance type stress principle;
placing a jack at the bottom of the rear upper crossbeam, gradually loosening the finish-rolled deformed steel bars on two sides of the fixed rear upper crossbeam, taking out a pad beam below the rear upper crossbeam, separating the rear part of the outer die template from the beam body, recovering and supporting the hydraulic jack, enabling the cradle to fall on the chute integrally, and completing the conversion of template separation and cradle stress system;
taking out the upper cross beam to fix the finish rolling deformed steel bar, utilizing a hydraulic jack to enable the hanging basket to slide forwards, after the hanging basket slides to the next section, installing a pad beam at the support of the upper cross beam, penetrating the finish rolling deformed steel bar, adjusting the finish rolling deformed steel bar and the screw top of the main truss to position a template of the hanging basket, using the front upper cross beam to suspend the bottom die system and the template supporting system to adjust the template in place, completing the integral translation and template fixation of the hanging basket, and performing section reinforced concrete construction;
the end head of the main truss of the through-type hanging basket and the corresponding position of the front upper cross beam are provided with pre-embedded holes, the suspension bottom die system is additionally arranged at the front lower cross beam of the through-type hanging basket, the suspension bottom die system is directly suspended by the main truss through the pre-embedded holes, the front upper cross beam can be directly and independently removed, and the construction of a closure section can be completed at one time without removing the hanging basket bottom die system.
2. The construction method suitable for the rapid positioning of the closure section of the through-type cradle as claimed in claim 1, wherein the main truss of the through-type cradle forms an integral suspension system with the rear upper cross beam by means of C-shaped hooks, and hydraulic jacks for adjusting the left and right C-shaped hooks are arranged between the main truss and the C-shaped hooks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810610653.XA CN108867406B (en) | 2018-06-14 | 2018-06-14 | Construction method suitable for quick positioning of closure section of through-type hanging basket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810610653.XA CN108867406B (en) | 2018-06-14 | 2018-06-14 | Construction method suitable for quick positioning of closure section of through-type hanging basket |
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| CN108867406A CN108867406A (en) | 2018-11-23 |
| CN108867406B true CN108867406B (en) | 2021-02-05 |
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| CN201810610653.XA Active CN108867406B (en) | 2018-06-14 | 2018-06-14 | Construction method suitable for quick positioning of closure section of through-type hanging basket |
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| CN113863167A (en) * | 2021-10-22 | 2021-12-31 | 中建三局集团有限公司 | Descending type suspension casting hanging basket and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3946342B2 (en) * | 1998-03-09 | 2007-07-18 | 三井住友建設株式会社 | Bridge erection device |
| CN102094392B (en) * | 2011-03-03 | 2012-05-02 | 中铁四局集团第一工程有限公司 | Lower supported hanging basket in bridge construction and application thereof |
| CN102174796B (en) * | 2011-04-06 | 2012-07-25 | 湖南中铁五新钢模有限责任公司 | Cantilever casting construction cradle with underlaid main truss |
| CN202073046U (en) * | 2011-05-13 | 2011-12-14 | 湖南中铁五新钢模有限责任公司 | Main truss system of downward hanging basket |
| JP5331924B1 (en) * | 2012-06-28 | 2013-10-30 | 黒沢建設株式会社 | SPC bridge construction method |
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