CN110820513A - Alignment construction method for diaphragm plate of prefabricated concrete T beam of curved bridge - Google Patents
Alignment construction method for diaphragm plate of prefabricated concrete T beam of curved bridge Download PDFInfo
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- CN110820513A CN110820513A CN201911157449.8A CN201911157449A CN110820513A CN 110820513 A CN110820513 A CN 110820513A CN 201911157449 A CN201911157449 A CN 201911157449A CN 110820513 A CN110820513 A CN 110820513A
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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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
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Abstract
The invention discloses a construction method for aligning transverse clapboards of a prefabricated concrete T-beam of a curved bridge, which adopts a 'middle-middle' construction method to control the transverse clapboards of the T-beam to align, in particular to the T-beam prefabrication, wherein a middle clapboard prefabrication section is poured by a fixed template with an unadjustable angle and interval, a middle clapboard template is vertical to the length direction of the T-beam, an end clapboard is formed by angle-adjustable templates, and the angle adjustment of the end clapboard is controlled according to the length of the T-beam and the radius of a curve. During installation, the middle-middle construction method is adopted to control the T-beam diaphragm plate to be aligned for construction, the T-beam diaphragm plate is easy to control to be aligned by using the construction method, the calculation process is simple, the operation is easy, only the end diaphragm plate adjustment angle needs to be calculated, and the step of calculating the adjustment angle by using the middle diaphragm plate is omitted. The 'middle-middle' construction method can effectively control the transverse partition plate to generate larger dislocation and can effectively control the alignment construction of the transverse partition plate of the prefabricated concrete T beam of the curved bridge.
Description
Technical Field
The invention relates to the field of bridge T-beam prefabrication and installation construction, in particular to a method for aligning and constructing prefabricated concrete T-beam diaphragm plates of a curved bridge.
Background
In the highway component, the prestressed concrete T-beam is the most commonly used concrete structure on the top of the bridge, and the T-beam is usually composed of beam ribs, diaphragms (including end diaphragms and middle diaphragms), and wing plates.
In the prior art, a novel reinforcing device for a T-beam diaphragm, which is applied by the company of Highway investigation and design of Henan province, and is disclosed in utility model (publication No. CN208136739U), comprises reinforcing steel bars, reinforcing steel plates, and tie bolts, wherein the reinforcing steel bars are implanted into the left and right sides of the upper end of the T-beam diaphragm, the upper ends of two adjacent T-beam diaphragms are connected by the reinforcing steel bars, the lower end of the T-beam diaphragm is provided with a plurality of positioning holes penetrating through the front and rear end faces, the front and rear sides of the lower end of the T-beam diaphragm are provided with the reinforcing steel plates, the reinforcing steel plates are provided with a plurality of mounting holes, the mounting holes are matched with the positions and the number of the positioning holes, the tie bolts sequentially penetrate through the mounting holes of the rear reinforcing steel plate, the positioning holes of the T-beam diaphragm and the mounting holes of the front reinforcing steel plate and the front and rear reinforcing steel plates to the front and rear end faces of the T-, meanwhile, the supporting mechanism is arranged, so that the joint of the transverse clapboard of the T-shaped beam can be reinforced and supported, the damage rate of the joint is reduced, and the maintenance frequency is reduced.
However, the above prior art has not considered the following problems: in the current T-beam construction, the transverse partition plate construction often has the defects of unstable stressed structure, poor appearance quality and the like due to the fact that a large staggered platform is generated after installation. At present, the transverse clapboard of the T beam usually comprises two construction methods, firstly, the reinforcing steel bars of the transverse clapboard are reserved in the T beam prefabrication, and the later-stage formwork erection is performed to complete the pouring of the transverse clapboard. And secondly, the curve radius of the curve bridge, the length of the T-shaped beam and the distance between the diaphragm plates are inverted to calculate the deflection angle and the deflection position of the diaphragm plates, and the positions of the diaphragm plates are positioned according to the calculation result during pouring, so that the required calculation is complex, the calculation process is complicated, and the mounting positions of the diaphragm plates are aligned due to errors easily occurring in construction. Therefore, how to adopt a simple method, quickly and safely finish the alignment construction of the transverse diaphragm of the T-shaped beam under the condition of meeting the quality standard requirement needs a construction method which can well solve the problems.
Disclosure of Invention
The invention aims to solve the defects of the prior art for aligning the diaphragm plates of the T-shaped beam of the superstructure of the bridge, and provides a method which is simple in construction method, simple and convenient to calculate and convenient to construct on site.
The invention is realized by the following steps:
the invention provides a method for controlling the alignment of a transverse clapboard of a T-shaped beam by adopting a 'middle-middle' construction method, in T-shaped beam prefabrication, a middle clapboard prefabrication section is poured by adopting a fixed template with non-adjustable angle and interval, a middle clapboard template is vertical to the length direction of the T-shaped beam, an end clapboard is formed by adopting an angle-adjustable template, and the angle of the end clapboard is controlled according to the length of the T-shaped beam and the radius of a curve. During installation, the middle-middle construction method is adopted to control the T-beam diaphragm plate to be aligned for construction, the T-beam diaphragm plate is easy to control to be aligned by using the construction method, the calculation process is simple, the operation is easy, only the end diaphragm plate adjustment angle needs to be calculated, and the step of calculating the adjustment angle by using the middle diaphragm plate is omitted.
The specific implementation is as follows: the T beam is prefabricated by adopting a steel mould, the middle partition plate adopts a non-adjustable angle and interval template, the length-adjustable template of the T beam must be added between the transverse partition plate and the middle partition plate at the end part of the first channel, and the position of the middle partition plate cannot be added with an adjustable template; adjusting the deflection angle of the end baffle plate according to design requirements; after the T beam meets the beam erecting condition, the T beam is installed, the installation of the T beam is controlled by adopting a coordinate control method, leads are led from the central point of the installation support, the longitudinal and transverse directions are adopted for control, and the center is mainly checked whether the middle partition plate is aligned or not; after the T-shaped beam is installed, anti-overturning measures are taken at the end part of the T-shaped beam, the diaphragm plate steel bar welding work is completed in time, after the whole-span T-shaped beam is installed, the whole-span welding work of the diaphragm plate steel bar welding work of each adjacent T-shaped beam is completed, and the whole span is connected into a whole. The hanging basket is adopted to complete the concrete pouring of the transverse partition plate, the end templates are poured firstly, the end templates on two sides are poured simultaneously, the concrete is checked at any time in the construction process, and the dislocation caused by the concrete vibration is found to be adjusted and fixed in time. And after the end partition plate is subjected to concrete pouring and the formwork removal strength is reached in the age, the concrete pouring of the partition plate can be completed.
The middle-middle construction method can effectively control the transverse partition plates to generate larger dislocation, can effectively control the alignment construction of the transverse partition plates of the prefabricated concrete T-shaped beam of the curved bridge, and is also applicable to the linear bridge only by adjusting the position of the end partition plate to be vertical to the length direction of the T-shaped beam.
Therefore, compared with the prior art, the T-shaped beam is prefabricated and installed by adopting a 'middle-middle' construction method, the diaphragm plates can be effectively aligned, the phenomenon of large dislocation is avoided, the calculation is simple, only the deviation angle of the end diaphragm plate needs to be calculated, and the position of the diaphragm plate is fixed and is not adjusted. The invention provides a 'middle-middle' construction method mainly depending on the theoretical basis that the T-shaped beams of the curved beam bridge are still straight lines, and as the distance between the partition plates in each T-shaped beam is equal and is vertical to the length direction of the T-shaped beam, the middle partition plates only need to be aligned to the position of one partition plate, and the positions of the rest partition plates are automatically aligned. The position of the end baffle plate is adjusted through an adjustable length template constructed between the middle baffle plate and the end baffle plate, and the deflection angle is calculated according to the radius of the curve and the central position of the T-shaped beam, so that the adjustment angle of the end baffle plate can be conveniently and quickly calculated.
Drawings
FIG. 1 is a schematic plan view of a "medium-medium" construction method for installing a T-beam according to the present invention;
FIG. 2 is a schematic plan view of the T-beam template system of the present invention;
description of reference numerals: the method comprises the following steps of 1-capping beam, 2-T beam, 3-support, 4-end partition plate, 5-middle partition plate, 6-middle partition plate interval, 7-middle partition plate-end partition plate interval, 8-adjustable bolt, 9-end partition plate template, 10-adjustable length template, 11-middle partition plate template and 12-T beam template.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention is implemented as follows:
as shown in fig. 1 and 2, the prefabricated concrete T-beam diaphragm plate of the curved bridge is constructed in an aligned mode, a prefabricated T beam is prefabricated on a beam field pedestal by a T-beam template 13, and the T-beam template mainly comprises adjustable bolts 8, an end diaphragm template 9, an adjustable length template 10 and a middle diaphragm template 11. According to the linear control of the curved bridge, the width of a bridge wing plate is adjusted, and the T-shaped beam rib 2 is always in a linear form. In the T-beam prefabricating and mounting process, a 'middle-middle' construction method is adopted, namely a middle partition plate template 11 is fixed on a template 13 which is vertical to the length direction of the T-beam, the angle and the distance 6 cannot be adjusted, and the equal distance 6 between the partition plates in each T-beam can be ensured; the end clapboard template adopts an angle-adjustable template 9, and the adjustable bolt 8 is adjusted to control the rotation angle of the end clapboard according to the curve radius of the curve bridge and the length of the T-shaped beam, so that the positions of the end clapboards 4 can be aligned after the T-shaped beam is installed in place at the later stage of the end clapboard; the length of the T-beam is controlled by an adjustable template 10, which must be applied between the end diaphragm template 9 and the middle diaphragm template 11, and the adjustable template 10 cannot be applied between the middle and the interval 6 between the middle diaphragm and the middle diaphragm cannot be changed. When the T beam is installed, the distance between the middle partition plate 5 and the middle partition plate 5 is equal and perpendicular to the direction of the T beam when the T beam is prefabricated, and therefore the alignment of the positions of the middle partition plates 5 can be simply and accurately guaranteed. The end partition plate 4 adopts the length-adjustable template 10 to change the prefabrication position of the end partition plate 4, and adopts the adjustable bolt 8 to control the rotation angle of the end partition plate template 9, so that the alignment of the T-beam installation rear end partition plate 4 can be ensured. By adopting the construction method, the position and the rotation angle of the end clapboard template 9 only need to be adjusted, and the calculation is simple. The median septum template 11 is unadjustable, guarantees that median septum interval 6 is the length unanimity when prefabricated, guarantees the accurate alignment of later stage installation to save more process operation, alleviate the distortion influence that the template was adjusted repeatedly and is caused.
Further, the method for calculating the deflection angle of the end baffle needs to obtain calculated basic parameters by referring to a drawing, and is explained by calculation of one beam:
permanent center coordinates of a certain T-beam end A: (X, Y) ═ X1,Y1) (ii) a Permanent center coordinates of the B terminal: (X, Y) ═ X2,Y2) (ii) a Permanent center coordinates of the A end of the other T beam: (X, Y) ═ X3,Y3)。
The coordinate conversion is not carried out, the absolute coordinate system is used for calculation, and according to the vector included angle formula, the calculation formula of the included angle between the central line of the A-end support and the T-shaped beam is as follows:
wherein: the vector a is expressed as a vector in the beam length direction; the vector b is represented as a vector in the direction of the support. It is to be noted here that the vectors a, b both start from the intersection of the beam with the support centre line:
a＝(X2-X1,Y2-Y1)；b＝(X3-X1,Y3-Y1) (2)
according to the definition of the deflection direction of the beam end of the T beam, the deflection angle of the T beam and the central line of the support is calculated as follows:
sometimes the construction site does not have the rotation angle condition of measurationing, can turn into the deviation distance according to flange board length, flange board length is L:
Δd＝L/2*tanθA(4)
the beam end expansion deviation distance, the reference angle deflection direction, is consistent with the deflection direction of the bent cap 1 of the T beam.
Furthermore, the first T-beam 2 is installed, the span middle position T-beam 2 is installed firstly, the accuracy of the installation position of the first T-beam must be ensured, the accuracy of the installation longitudinal and transverse positions of the T-beam is checked, the accuracy of the installation position of the partition plate 5 in the T-beam is particularly checked, the installation accuracy of the first T-beam is ensured, temporary fixing measures are taken after the installation is finished, and the influences of overturning, dislocation and the like caused by construction reasons of the T-beam are prevented.
And further, mounting a second T-shaped beam, aligning the position of the middle clapboard 5 by taking the position 5 of the clapboard in the mounted T-shaped beam 2 as a reference, and taking a measurement control measure as an auxiliary means to accurately adjust the mounting position of the T-shaped beam 2.
Further, the installation procedure operation is repeated until the installation of the whole-collapse T-shaped beam 2 is completed.
Further, the installation of the T-shaped girder which completely collapses is completed, the steel bar welding of the transverse partition plate of the T-shaped girder 2 is completed, the steel bar is required to be reserved for the beam-end partition plate 4 and the middle partition plate 5 which do not have the plates, the lap joint steel bar welding is adopted, so that the bridge span is firstly connected into an integral structure through the steel bar welding, and the steel bar is reserved for the welding by adopting the steel bar lap joint welding end partition plate 4 and the middle partition plate 5.
Furthermore, after the end partition plate 4 and the middle partition plate 5 are welded into a whole by reserved steel bars, the vertical formwork completes concrete pouring of the beam end partition plate 4 and the middle partition plate 5, the position part of the end partition plate 4 is poured firstly, after the pouring is completed and the formwork is disassembled, the T beam can be connected into an integral structure by certain strength, and concrete is poured at the position of the middle partition plate 5.
The invention controls the alignment of the positions of the transverse partition plates of the T-shaped beam 2 by adopting a 'middle-middle' construction method, has no redundant calculation process, does not need to be adjusted in the construction by controlling the same distance 6 between the middle partition plates 5, aligns the position of one middle partition plate 5, aligns the positions of the other middle partition plates 5, has simple operation and has no larger error influence after the installation is finished. The position of the end partition plate 4 needs to be adjusted according to the curve radius and the installation position of the T beam, the prefabricated position of the end partition plate 4 is adjusted through the length-adjustable template 10, the calculation process is slightly complex, but the calculation method is completely consistent for each T beam, so that the calculation process can be rapidly calculated through EXCEL office software. The whole set of construction method has strong application performance to construction site technicians, so that the construction site technicians can more conveniently determine various prefabricated parameters of the end partition plates 4 and the middle partition plates 5 when the T-beam is prefabricated, the position accuracy of the end partition plates 4 and the middle partition plates 5 when the T-beam is installed can be effectively ensured, the whole set of construction method is simple in calculation and easy to understand, the working procedure operation time is saved, and the method is convenient to popularize and apply.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. A method for aligning and constructing prefabricated concrete T-beam diaphragm plates of a curved bridge is characterized by comprising the following steps: according to the method, the angle of the end partition plate is adjusted, the calculation process is simplified, the T-beam prefabrication is completed by adopting a 'middle-middle' construction method, the space between the middle partition plates is fixed, and after the prefabricated T-beam is installed, the transverse partition plates are small in dislocation and accurate in positioning.
2. The alignment construction method of the prefabricated concrete T-beam diaphragm of the curved bridge according to claim 1, characterized by comprising the following steps:
1) the T beam is prefabricated on a beam field standard pedestal, the T beam is prefabricated according to the prefabricated length of the T beam by adopting a steel template, and the T beam is prefabricated by adopting a construction method of 'middle-middle';
2) the T beam meets the beam erecting condition, and the T beam is transported and installed;
3) after the T beam is installed, a temporary overturn-preventing measure is implemented, and the steps 2) and 3) are repeated;
4) and after the installation of the whole and collapsed T-shaped beam is finished, the processes of welding the transverse clapboard steel bars of the T-shaped beam and pouring concrete are finished.
3. The alignment construction method of the prefabricated concrete T-beam diaphragm of the curved bridge according to claim 2, characterized in that: in the step 1), prefabricating a T beam by adopting a steel template, wherein a middle partition plate prefabricating section template adopts a fixed template with an unadjustable angle and interval, and the middle partition plate template is vertical to the length direction of the T beam; the end clapboard template adopts an angle-adjustable template, and the adjusting angle of the control end clapboard is calculated according to the length of the T-shaped beam and the radius of the curve.
4. The alignment construction method of the prefabricated concrete T-beam diaphragm of the curved bridge according to claim 2, characterized in that: in the step 2), the T-beam is installed by adopting a construction method of 'middle-middle': firstly, the installation of a first T beam at the middle position is completed, and the first T beam is used as a reference for the subsequent T beam installation; the distance between the partition boards in the prefabricated T-shaped beam is equal, the subsequent T-shaped beam is installed and constructed, the T-shaped beam is installed by aligning the partition boards, and the subsequent T-shaped beam is accurately adjusted by measurement assistance.
5. The alignment construction method of the prefabricated concrete T-beam diaphragm of the curved bridge according to claim 2, characterized in that: and 3) in the step 3), after each T-shaped beam is installed, taking a overturn prevention measure at the end part of the T-shaped beam.
6. The alignment construction method of the prefabricated concrete T-beam diaphragm of the curved bridge according to claim 2, characterized in that: and 4) after the whole-span T beam is installed, welding the transverse partition plate steel bars of every two adjacent T beams in a welding mode, integrally collapsing and connecting the T beams into a whole, and erecting a hanging basket formwork to finish the concrete pouring of the transverse partition plate.
7. The alignment construction method of the prefabricated concrete T-beam diaphragm of the curved bridge according to claim 3, is characterized in that: in the prefabricated steel form of T roof beam, the adjustable length part of steel form must add between diaphragm and the first end median septum that leans on, and adjustable template can not be added to middle median septum position, guarantees that the distance equals between each median septum.
8. The alignment construction method of the prefabricated concrete T-beam diaphragm of the curved bridge according to claim 6, is characterized in that: when the diaphragm plate steel bar is welded, the steel bar welding seam requires double-sided full welding, and the steel bar is welded by adopting lap joint steel bar welding connection to form an integral stable structure.
9. The alignment construction method of the prefabricated concrete T-beam diaphragm of the curved bridge according to claim 6, is characterized in that: when the transverse partition plate is cast, the end partition plate part is cast firstly, the form removal is completed, and the middle partition plate part is cast after the end strength reaches the requirement to be integrated, so that the T-shaped beam can be effectively prevented from moving and dislocating caused by concrete vibration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911157449.8A CN110820513A (en) | 2019-11-22 | 2019-11-22 | Alignment construction method for diaphragm plate of prefabricated concrete T beam of curved bridge |
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| CN201911157449.8A CN110820513A (en) | 2019-11-22 | 2019-11-22 | Alignment construction method for diaphragm plate of prefabricated concrete T beam of curved bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114737485A (en) * | 2022-05-13 | 2022-07-12 | 福建第一公路工程集团有限公司 | Construction method for preventing transverse partition plate from being dislocated by prefabricated box girder |
| CN117822410A (en) * | 2024-03-04 | 2024-04-05 | 中国建筑一局(集团)有限公司 | Steel-concrete combined diaphragm beam structure with transversely connected T beams and construction method |
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| CN117822410B (en) * | 2024-03-04 | 2024-05-28 | 中国建筑一局(集团)有限公司 | Steel-concrete combined diaphragm beam structure with transversely connected T beams and construction method |
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