CN101057039A - Bridge slab construction method and lattice bar deck-shaped precast concrete plate applied therein - Google Patents
Bridge slab construction method and lattice bar deck-shaped precast concrete plate applied therein Download PDFInfo
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- CN101057039A CN101057039A CNA2005800381252A CN200580038125A CN101057039A CN 101057039 A CN101057039 A CN 101057039A CN A2005800381252 A CNA2005800381252 A CN A2005800381252A CN 200580038125 A CN200580038125 A CN 200580038125A CN 101057039 A CN101057039 A CN 101057039A
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
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Abstract
Provided is a method of constructing a slab of a bridge in which a plurality of girders are placed parallel to one another on upper surfaces of neighboring piers, a plurality of cross beams are formed between the girders, a plurality of lattice bar deck-shaped precast concrete plates that are separately precast are hoisted and installed by a deck truck, and concrete is placed after a plurality of reinforcing bars are arranged in an upper portion of the precast concrete plate, to cure a composite slab formed integrally with the precast concrete plate. In a precasting process of the lattice bar deck- shaped precast concrete plate, a plurality of reinforcing bars are arranged in a rectangular frame to be orthogonal in a lengthwise direction and a widthwise direction, a plurality of truss frames are arranged to protrude from the rectangular frame at both symmetrical positions with respect to a center of a lengthwise direction, and concrete is placed and cured in the rectangular frame so that the precast concrete plate maintains a high strength over a compression strength of the slab.
Description
Technical field
The lattice bars bridge floor shape that the present invention relates to a kind of bridge plate construction method and wherein the use concrete slab of precoating.The invention particularly relates to a kind of bridge plate construction method, this method has solved the inconvenient part in the conventional method, promptly by installation frame and scaffold in the building course of the bridge plate on the top of bridge, solidifies concrete, and remove framework after concrete setting.Like this, reduced on the scaffold such as because the accident of slipping and falling owing to need not to be operated in, and, improved operating efficiency by reducing operation.Use can further improve the performance of bridge according to design standard and by the high strength of the check concrete slab of precoating, and can discern the bridge extent of damage by naked eyes.The present invention further relates in particular to and uses the lattice bars bridge floor shape concrete slab of precoating.
Background technology
Typically bridge comprises a plurality of bridge piers of establishing from ground with specific interval; Between the upper surface of adjacent bridge pier with the horizontally disposed longeron that is parallel to each other of specific interval; Between adjacent longeron,, prevent that to reinforce longeron it is sagging with the vertically disposed crossbeam of specific interval; And be installed on the top of longeron and with the bridge plate of after coagulation.
Longeron adopts the structure of prestressed concrete beam or steel case beam type, makes for bearing lateral force or the crooked pressure that pressure at right angle brings.The weight of above-mentioned pressure at right angle such as bridge plate itself or comprise bracing piece or the estimating one's own ability of multiply steel hinge line.For concrete beam, the framework of crossbeam is installed between the concrete beam orthogonally with predetermined space, and inject concrete in wherein solidifying crossbeam, thereby reinforced concrete beam.In addition, for the structure according to bridge top makes up bridge plate, the framework (wherein injecting concrete) of the interim base plate of a kind of conduct must be installed at the upper surface of longeron.
Framework is by rectangular wood ability or veneer manufacturing, and this framework is interim installation component, will be removed after bridge plate solidifies and remove.In the recent period, a kind of new construction process of extensive use occurred, promptly used the concrete slab of precoating of a part that forms bridge plate, and do not need after structure is finished, to remove.
In addition, framework must cause the inconvenience on the program, promptly after building finishes, when finding the crack by macrography in concrete structure, must remove or remove framework earlier, just can carry out maintenance and repair afterwards.In addition, scaffold (workpiece (work) is moving on the scaffold with movable) is by being connected under the bottom surface that is installed in framework by wire.Because therefore the situation around the size (width) of scaffold is subject to exists the possibility of slipping and falling, thereby can not guarantee to protect the stable operation environment of precious life
Therefore, for solving the problem that above-mentioned use frame construction bridge plate method is brought, proposed to relate to the new technologies and methods of the compound of the concrete slab of precoating.Alleged herein a kind of manufacture method of using fixing equipment to make in advance in factory of the representative of precoating.Owing to can make under the best circumstances, to compare with the concrete product of building at the construction field (site), the product of precoating has the precision of improvement and the advantage of intensity.
Number of patent application is the example that the korean patent application of 1996-2157 discloses above-mentioned technology.Prior art is included in the longeron of the upper end of bridge pier along the parallel longitudinal arrangement of bridge, the upper surface of this longeron is formed with protuberance and hook step (hook step) (for the beam of steel case (steel box) type, the crook that will be described below (hook portion) and be fixed on the upper surface of longeron with a plurality of studs of many rows that the bracing piece that is used for grappling couples); Be installed on the hook step of longeron and form the half-bridge plate of supporting step (support step) (lattice bars bridge floor shape precoat concrete slab) in the position of correspondence; For preventing the interference of surrounding structure, the recess that is formed at the both sides, bottom surface be connected step; And be formed at the outstanding shape portion of colluding of two side ends along continuous straight runs; The bracing piece that is used for grappling of shape portion is colluded in insertion, and the top that connects lattice bars connects bracing piece (going up bracing piece); And place on the half-bridge plate and the bridge plate that solidifies.Except that above-mentioned parts, also be useful on the brake of the slippage that prevents the half-bridge plate, be used to prevent that mortar from invading the layer envelope (packing) of critical piece, be used for the plate with the longeron coupling, and bolt.
In the compound bridge plate construction method that is configured the concrete slab of precoating as above according to above-mentioned prior art, there is the half-bridge plate of hook portion directly to be put on the longeron in factory or the manufacturing of certain building site, connect the bracing piece insertion hook portion that bracing piece and bracing piece suitably were provided with and were used for grappling, then concrete is injected wherein.Promptly after the bridge plate of the first half solidified, hook portion is built in bridge plate and firm fixing with the bracing piece that is used for grappling, and was intactly synthetic thus.
But prior art has defective, and that is that to should be the shape of longeron special, so longeron needs to make especially.In addition, accurate concrete slab has very complicated bracing piece distribution structure, and needs additional structure just to be accomplished compound with above-mentioned bridge plate.Especially, because in order to get rid of the concavity shape of the interference when installing, the concrete slab of precoating structurally has weakness.
Consider above-mentioned prior art problems, the applicant's number of filing an application be in the Korean Patent of 2000-56002 please, this application exercise question is for " a kind of bridge plate building method and the concrete slab of using therein of precoating " and obtain license.
According to this patent, the lattice bars bridge floor shape that has adopted distribution design by new bracing piece the to have simple structure concrete slab of precoating, thereby compared with prior art, its construction process and structure are avoided the weakness of structure in the prior art and by using the existing structure provided to reach light construction.In addition, owing to compare with the compressive strength of the permission of the bridge plate that solidifies on top, the concrete slab of precoating has been designed to keep lower intensity, therefore precoats concrete slab than the more Zao breaking-up of bridge plate.Occur the crack on bridge plate, this crack can be discerned by naked eyes, and maintenance and repair work can be carried out like a cork thus.
But, has certain restriction according to the bridge plate building method of the applicant's above-mentioned patent and the concrete slab of precoating used therein, promptly, because compound bridge plate is kept than the lower compressive strength of bridge plate to guarantee the visuality of bridge plate fatigue fracture, the intensity of the compound bridge plate of increase that can only be limited.
Summary of the invention
In order to solve above-mentioned and/or other problem, the invention provides a kind of bridge plate construction method, this method has been removed on conventional method jackshaft top and has been built step inconvenient in the bridge plate process, as installation frame and scaffold and remove framework after concrete setting.Owing to need not to be operated on the scaffold minimizing possibility that feasible accident of falling such as slipping takes place.Increase work efficiency by reducing program loop.By using, further improve the performance and the safety of bridge according to the high strength of the design standard by the test verification concrete slab of precoating.When the bridge plate fatigue fracture, can result from precoat crack on the concrete slab, bottom by naked eyes identification, maintenance and repair fast thus, thus for example prevent fearful unexpected generations such as bridge collapses.The present invention also provides a kind of lattice bars bridge floor shape that is applied to this method concrete slab of precoating.
According to an aspect of the present invention, in a kind of bridge plate method of building bridge, a plurality of longerons uniformly-spaced are positioned over the upper surface of the adjacent bridge pier of establishing with predetermined space in parallel to each other; A plurality of crossbeams are formed between the described longeron with predetermined space; A plurality of lattice bars bridge floor shapes of precoating respectively according to predetermined dimension and number concrete slab of precoating promotes and delivery by the bridge floor transport vehicle, to install near the top of described longeron in parallel to each other according to desired number; Inject concrete be set at the top of the described concrete slab of precoating that forms base plate at a plurality of bracing pieces after, thereby solidify with compound bridge plate that the described concrete slab of precoating forms one; Wherein, in described lattice bars bridge floor shape is precoated the process of precoating of concrete slab, a plurality of bracing pieces are arranged in the rectangular frame with desired depth, described a plurality of bracing piece is provided with at vertical and horizontal orthogonally with predetermined interval, a plurality of truss frames are configured to give prominence to predetermined altitude from described rectangular frame in two positions with respect to longitudinal center's symmetry, concrete injected and freeze solidly on described rectangular frame, thereby according to the design standard of first Pretesting, the described concrete slab of precoating is kept above the high strength of bridge plate compressive strength.
The described preceding step of concrete slab of precoating is installed further to be comprised, smear the mortar of suitable thickness at all surfaces of the longeron that contacts with the described concrete slab of precoating, thereby the described concrete slab of precoating can be from the upper surface landing of described longeron with regard to stably installing, and keeps enough contact area to be fixed together.
According to a further aspect in the invention, a kind of lattice bars bridge floor shape that is used to build the bridge plate of bridge concrete slab of precoating comprises: the rectangular slab main body, be designed to keep being higher than the compressive strength of bridge plate, and adopt the method for precoating manufacturing according to design standard from compressive strength; A plurality of main bracing pieces and distribute bracing piece, with predetermined space longitudinally with quadrature transverse ground berry (berried in) in the plate main body; A plurality of truss frames, part berry are between described main bracing piece, and setting in parallel to each other longitudinally, and outstanding from the upper surface portion of described position main body.
When the compressive strength of described bridge plate is 270-400kgf/cm
2During particular value in the scope, the compressive strength of the described concrete slab of precoating is manufactured to the value of the compressive strength that is kept above described bridge plate.
The thickness of described plate main body is at least 50mm, is no more than 60% of compound bridge plate thickness simultaneously.
Described truss frame comprises: two bottom bracing pieces, with the both sides of the predetermined main bracing piece that is arranged at intervals at the center; Lattice bars, at predetermined height above the center between the bracing piece of described bottom, and along described plate main body upper surface of vertically exposing of described plate main body; And just silk, crooked incessantly repeatedly and be welded to each bottom bracing piece along the hypotenuse that forms by bottom bracing piece and lattice bars, thus the trussed construction of bottom bracing piece and lattice bars formation one.
Description of drawings
Fig. 1 is the schematic diagram of demonstration according to the bridge construction of the method structure of one embodiment of the present invention;
Fig. 2 to 5 shows the schematic diagram of building the step of bridge plate method according to the present invention, wherein
Fig. 2 is the schematic diagram that shows first step, has shown that a plurality of longerons are positioned over the state on bridge pier top;
Fig. 3 is the schematic diagram that shows second step, has shown that the bridge floor transport vehicle is installed on the top of longeron, and s crossbeam frame is sling and is installed between the longeron, injects concrete and form crossbeam in s crossbeam frame;
Fig. 4 is the schematic diagram that shows third step, has shown that the concrete slab of precoating according to the present invention is installed on by the formed opened upper end of longitudinal and cross beam portion;
Fig. 5 is the schematic diagram that shows the 4th step, has shown the state after the bridge floor transport vehicle that installs on longeron top is removed, and is provided with bracing piece, and inject concrete thus bridge plate solidify with the concrete slab of precoating;
Fig. 6 is the vertical sectional view of bridge, shows the structure according to compound bridge plate that construction method of the present invention is built;
Fig. 7 shows the schematic diagram that is used for the concrete slab structure of precoating of bridge plate construction method according to the present invention;
Fig. 8 be with the concrete slab surface parallel direction of precoating on sectional view, show the internal construction of the concrete slab of precoating according to the present invention;
Fig. 9 is the sectional view along A-A line among Fig. 7, shows the internal construction of the concrete slab of precoating according to the present invention;
Figure 10 is the sectional view along B-B line among Fig. 7, shows the internal construction of the concrete slab of precoating according to the present invention;
Figure 11 is a conventional field concrete sample and according to the vertical sectional view of the concrete slab complex coagulation earth sample of precoating of the present invention, makes above-mentioned sample and is used to carry out contrast test about the compound bridge plate of concrete slab of precoating of the present invention; And
Figure 12 show for each conventional field concrete sample and according to the concrete slab complex coagulation earth sample of precoating of the present invention, according to shown load of the result of quasistatic feature test and the relation between the displacement.
The specific embodiment
Fig. 1 shows according to a kind of bridge plate construction method of the present invention to Figure 12, and the concrete slab of precoating of lattice bars bridge floor shape wherein, is used for the sample with the performance comparison check of the compound bridge plate of concrete slab of precoating, and result that should check.Fig. 1 is the schematic diagram of demonstration according to the bridge construction of the method structure of one embodiment of the present invention.Fig. 2 to 5 shows the schematic diagram of building the step of bridge plate method according to the present invention, and wherein Fig. 2 is the schematic diagram that shows first step, has shown that a plurality of longerons are positioned over the state on bridge pier top; Fig. 3 is the schematic diagram that shows second step, has shown that the bridge floor transport vehicle is installed on the top of longeron, and s crossbeam frame is sling and is installed between the longeron, injects concrete and form crossbeam in s crossbeam frame; Fig. 4 is the schematic diagram that shows third step, has shown that the concrete slab of precoating according to the present invention is installed on by the formed opened upper end of longitudinal and cross beam portion; Fig. 5 is the schematic diagram that shows the 4th step, has shown the state after the bridge floor transport vehicle that installs on longeron top is removed, and is provided with bracing piece, and inject concrete thus bridge plate solidify with the concrete slab of precoating.Fig. 6 is the vertical sectional view of bridge, shows the structure according to compound bridge plate that construction method of the present invention is built.Fig. 7 shows the schematic diagram that is used for the concrete slab structure of precoating of bridge plate construction method according to the present invention.Fig. 8 be with the concrete slab surface parallel direction of precoating on sectional view, show the internal construction of the concrete slab of precoating according to the present invention.Fig. 9 is the sectional view along A-A line among Fig. 7, shows the internal construction of the concrete slab of precoating according to the present invention.Figure 10 is the sectional view along B-B line among Fig. 7, shows the internal construction of the concrete slab of precoating according to the present invention.Figure 11 is a conventional field concrete sample and according to the vertical sectional view of the concrete slab complex coagulation earth sample of precoating of the present invention, makes above-mentioned sample and is used to carry out contrast test about the compound bridge plate of concrete slab of precoating of the present invention.Figure 12 shown for each conventional field concrete sample and according to the concrete slab complex coagulation earth sample of precoating of the present invention, according to shown load of the result of quasistatic feature test and the relation between the displacement.
The structure of the bridge that the construction method according to the present invention as shown in Figure 1 makes up has and the typical similar structure of bridge.Promptly, bridge comprises a plurality of a plurality of bridge piers 1 of establishing from ground with specific interval, between the upper surface of adjacent bridge pier 1 with the horizontally disposed a plurality of longerons 2 that are parallel to each other of specific interval, between adjacent longeron 2 with the vertically disposed a plurality of crossbeams 3 of specific interval, described crossbeam 3 is reinforced longerons 2 and is prevented that it is sagging, and is installed on the top of longeron 2 and with the bridge plate 4 of after coagulation.But, compare difference only be to precoat compound structure of concrete slab P and bridge plate 4 and the construction method that adopts this structure with the korean patent application of submitting to by the applicant that preamble is mentioned.
The precoat bridge plate construction method of concrete slab of lattice bars bridge floor shape that utilizes according to the present invention can be widely used in all beam bridges and comprises prestressed concrete (PSC) crossbeam or longeron, or steel case beam.Be different from above-mentioned prior art, following additional structure is unnecessary.For example, protuberance and hook step on longeron (concrete beam) surface, precoat concrete slab, with the corresponding support step of hook step, the separating plate that is used for fixing the concrete slab of precoating, stud, and bolt (using and steel case beam), the basal surface both sides that are positioned at the concrete slab of precoating are used to prevent recess that other structures (stud and bolt) disturb and are connected step, be formed at the bracing piece that the concrete slab both sides of precoating are used for securely the shape portion of colluding that couples with bridge plate and are used for grappling, be used to prevent that mortar from invading the layer envelope (packing) of critical piece, and the brake of the slip of the concrete slab that is used to prevent to precoat.
Feature of the present invention is that the lattice bars bridge floor shape bridge plate 4 that concrete slab P must solidify with the top of the concrete slab P that precoats at lattice bars bridge floor shape of precoating keeps same intensity or stronger than it.This is for the concrete slab of strengthening precoating before bridge plate compound is the effect of framework, simultaneously the further intensity of the compound bridge plate of increase building is finished after.These characteristics are opposite with the characteristics of the prior art that this China invites the person proposes.The intensity of the bridge plate 4 that the intensity of concrete slab P bottom was solidified on top greater than the later stage although precoat, because the crack is formed at the bottom of the concrete slab P that precoats earlier, therefore be enough to the naked eye to discern and predict crack in bridge construction, thereby the difficulty that does not have maintenance and repair, this point will prove in the test hereinafter.When the intensity of precoat concrete slab P and bridge plate 4 not simultaneously, precoat between concrete slab P and the bridge plate 4 perfectly compound must through with respect to the interval of truss frame 20, highly and section the checking and approving of appropriate designs of size (sectional size).
The precoat main design standard of concrete slab P of lattice bars bridge floor shape of the present invention describes in detail with reference to Fig. 6 to 10.
First, the precoat height of truss frame 20 of concrete slab P, it is the position of lattice bars 23 (bracing piece of exposure), be designed to corresponding to component height (assembly height), this is highly considered and is arranged at that truss frame top is used for the top of solidifying of bridge plate 4 or the position of lower component bracing piece (not shown) is designed.The intensity of concrete slab P of precoating is that the section size according to employed frame-saw 20 determines.
In addition, as shown in Figure 6, the thickness D1 of the plate main body 21 of the concrete slab P that precoats is designed to 50mm at least, can not surpass 60% of compound bridge plate thickness D simultaneously.For example, when the gross thickness in conjunction with precoat concrete slab and the formed compound bridge plate of bridge plate was 250mm, the thickness of plate main body 21 must be between 50-150mm so.
In addition, in order to make the concrete slab P that precoats have minimum thickness, high strength that must holding plate P, intensity that must holding plate P is equal to or greater than the intensity of bridge plate 4.When using low intensive precoating during concrete slab, the concrete slab of precoating is damaged in the time of may transporting after manufacturing or install.
Shown in Fig. 7-10, the concrete slab P that precoats of the present invention comprises rectangular slab main body 21, its be designed to keep be higher than bridge plate 4 compressive strengths from compressive strength, and according to the design with the method manufacturing of precoating; Plate main body 21 built-in a plurality of main bracing pieces 22 and distribution bracing pieces 25, and arranged in a crossed manner mutually with predetermined interval; And a plurality of truss frames 20 that are provided with along the main bracing piece 22 of being parallel to of plate main body 21 and between main bracing piece 22, truss frame 20 parts place that the upper surface of other part slave plate main bodys 21 is outstanding simultaneously in the plate main body 21.By organically coupling plate main body 21, main bracing piece 22 and distributing bracing piece 25 and truss frame 20 to form the concrete slab P that precoats.
In the embodiment of Fig. 8, form that interval " a " between the bottom bracing piece 22a of truss frame 20 is narrower than each bottom bracing piece 22a and the main bracing piece 22 that is adjacent between interval " b ", their ratio is 1: 2.This ratio is only to consider ambient conditions and an example designing.Spacing " b " between interval " a " between the bracing piece 22a of bottom and each bottom bracing piece 22a and the main bracing piece 22 that is adjacent can be designed as and equates or different ways that the ratio of this shows not is structural restriction.
Use description to below to check and use the precoat test and the result thereof of bridge plate construction method appropriate level of concrete slab of lattice bars bridge floor shape of the present invention.This test is to be carried out by the associating problem group of Korea S state-run Quannan university (Chonnam National University) and Korea S Hunan University (Honam University).This test be used to prove use lattice bars bridge floor shape of the present invention to precoat bridge plate that concrete slab builds is compared its superior function with existing field concrete bridge plate.Under identical situation, 4 field concrete bridge plates and 5 concrete slab complex coagulation earth samples of precoating are carried out static state fracture test, carry out the Dynamic Fracture check then by bearing a heavy burden repeatedly, relatively more existing thus building site bridge plate and the difference of compound bridge plate on performance.
According to the result of above-mentioned test, compound bridge plate of the present invention is gone up with the intensity (ability to bear) of dynamically bearing a heavy burden in the heavy burden of bearing a heavy burden, rupture about surrender and is compared with the building site bridge plate, shows remarkable superiority.
, use 2 heavy burden methods to carry out and relate to whole static state of the present invention and Dynamic Fracture test after to have ratio between shearing (shearing) effective span and the effective height be 6 sample in manufacturing.The strong point is positioned at apart from the position of the inside 150mm in both ends of sample.Two points that bear a heavy burden at the space, center of sample 300mm are carried out heavy burden.Measure of the displacement of each sample at the center.As shown in figure 11, the long 3000mm of field concrete (FC) sample, wide 600mm, thick or high 250mm, three bracing pieces are built in the position of the inside 50mm of sample upper and lower surface along its length with identical spacing.The precoat long 3000mm of sample of concrete slab, wide 600mm, thick or high 250mm, three bracing pieces are built in the position of the inside 50mm of sample upper surface along its length with identical spacing.Employed compression bracing piece (go up bracing piece) and stretch that to draw bracing piece (bottom bracing piece) be respectively H16 and H22.The ratio of the compression bracing piece in FC is respectively 0.5% and 1.0% with stretching the ratio of drawing bracing piece.
1. the static state of each sample fracture test
At first to the concrete slab test of rupturing of precoating of lattice bars bridge floor shape.As the result of fracture test, wherein the concrete slab of precoating is applied 460kg and bear a heavy burden, this concrete slab of precoating reaches 1 in heavy burden, damages during 596kg.Therefore, when base plate is to be made up by pre-pouring concrete, can conclude that when use comprised that setting up of add-on security ratio born a heavy burden, the plate main body can not generate crackle.Just apply unexpected dangerous load at last, also can conclude, except the major injury of the plate main body of the fastener of the steel wire (lattice bars) that is included in compressed side, can not produce unexpected and fierce fracture damage.
This test continues until that 4 FC samples and 5 PCP composite samples are all owing to 2 static heavy burdens are ruptured.Table 1 is the result's of each test summary.Figure 12 by the test numerical value shown between the concrete sample of comparing heavy burden-displacement curve.
The static state fracture test result of table 1FC and PCP composite sample
According to table 1, PCP composite sample of the present invention and FC sample compare, and balanced growth is 2.1 times aspect the performance of fracture heavy burden, and balanced growth is 1.42 times aspect the performance of surrender heavy burden.Effect is owing to the lattice bars and the strong concrete (plate main body) that use the PCP composite sample bring like this.
In addition, in the static state heavy burden-displacement curve of Figure 12, the curve inclination is represented the flintiness of each sample.Other estimation flintiness of each heavy burden level of FC and PCP composite sample is all used numeric representation in the drawings, and their result is presented at table 2.
The flintiness of table 2FC and PCP composite sample relatively
So the flintiness of PCP composite sample is compared average increase by 14.5% with the FC sample.Effect is owing to the lattice bars and the strong concrete (plate main body) that use the PCP composite sample bring like this.That is, from the angle of structure, lattice bars has the function that improves resistance, with opposing owing to set up the function of compression, bending and shearing force that heavy burden brings.
In addition, precoat optimal compression ruggedness test result between the concrete slab as example, when the compressive strength of bridge plate reaches 270kgf/cm with top bridge plate and bottom
2The time, should be appreciated that the compressive strength of the concrete slab of precoating remains on 400kgf/cm
2
2. the heavy burden Dynamic Fracture repeatedly of each sample test
In this test, repeat 4 FC samples and 5 PCP composite samples are applied same weight up to these samples damages, thereby assess the dynamic flintiness of each sample.
Paper according to Young Hoon Park studies and delivers in academic research meeting in 1994 when the fatigue heavy burden that corresponding 60% static fracture is born a heavy burden puts on concrete beam repeatedly, needs to repeat more than 300,000 ability and reach fatigue fracture.Therefore, in this test, the assessment of performance can be undertaken by the number of times that bears a heavy burden repeatedly that each sample (promptly apply repeatedly and bear a heavy burden to each FC and PCP composite sample) relatively reaches fatigue fracture, wherein PCP can keep above bearing the tired heavy burden limit (being that the PCP composite sample bears the fatigue heavy burden that corresponding 60% static fracture is born a heavy burden repeatedly) repeatedly above 300,000 times.
Table 3 has shown that the static state fracture of FC and PCP composite sample is born a heavy burden and their average.Because tired repeatedly heavy burden that the correspondence 60% static fracture of PCP composite sample is born a heavy burden in table 3 is 17 tons, when the tired repeatedly ratio that bears a heavy burden of PCP composite sample was 60%, the tired repeatedly ratio that bears a heavy burden of FC sample was 77.5%.
The static state fracture of table 3FC and PCP composite sample is born a heavy burden and tired comparison of bearing a heavy burden
| Classification | The FC sample | The PCP composite sample | |
| Static fracture heavy burden (ton) | 1 | 21.38 | 29.03 |
| 2 | 21.45 | 28.32 | |
| 3 | 22.61 | 29.70 | |
| 4 | 22.31 | 26.61 | |
| 5 | - | 27.89 | |
| Averaged static fracture heavy burden (ton) | 21.94 | 28.31 | |
| The occupation rate of 60% tired repeatedly bear a heavy burden (17 tons) that bear a heavy burden with respect to the fracture of each averaged static fracture heavy burden PCP composite sample averaged static | 0.775 | 0.600 | |
As the result of Dynamic Fracture test, FC sample and PCP composite sample show thus that respectively in average time 61,222 and fracture in 323,685 o'clock the PCP composite sample is obtaining to improve significantly than FC properties of sample in the tired test of bearing a heavy burden repeatedly.As mentioning in static state fracture assay like that, this is to draw reducing of intensity because of stretching of being generated of the main bracing piece 22 (stretch and draw bracing piece) in the concrete slab of precoating.According to this check, because the PCP composite sample has showed typical bend fracture process by dynamically bearing a heavy burden repeatedly, can notice, can not be by edge surface accumulated fatigue of precoating between concrete slab P and the bridge plate 4 of the present invention being produced fracture (spillover (slop phenomenon)).
Below sum up by the static state and the Dynamic Fracture of above-described PCP composite sample and test the result who obtains.The first, static state bear a heavy burden test performance relatively in, PCP complex coagulation earth sample is compared with the FC sample and is being showed significant superiority aspect the bending strength (flintiness).The pulling force of stretching that draws bracing piece (bottom bracing piece) to be produced of stretching of precoating in the concrete slab is significantly less than the FC sample.Such effect is that the suitable and additional setting owing to the high-strength concrete of the concrete slab of precoating and bracing piece brings.
The second, in the Dynamic Fracture test, owing to apply same heavy burden repeatedly, although PCP complex coagulation earth sample ruptures in the time of average 323,685 times, the FC sample has just ruptured at average 61,222 times.According to the result of fatigue test, compare PCP composite concrete bridge plate with the FC sample and represented significant performance.
The 3rd, opposite in the fragility that edge plane represented (defective) of precoating between concrete slab and the bridge plate with the PCP composite concrete bridge plate of being paid close attention to, in static and Dynamic Fracture test result, above-mentioned edge plane does not generate fracture.This means, can not produce sliding phenomenon (slip phenomenon) in the edge plane of precoating between concrete slab and the bridge plate, and show complete compound performance.
The 4th, result according to this test and practice of construction, concrete slab keeps integrally being combined with each other than the bigger compressive strength of top bridge plate and they although precoat in the bottom, because the crack is created on the concrete slab of precoating when fatigue fracture, with the naked eye crack identification is impossible.
The example of using said structure among the present invention and building the bridge plate method by the concrete slab P that precoats of above-mentioned test is described below with reference to Fig. 2 to 5.
At first, carry out the step of precoating, wherein make the concrete slab P that precoats of the specification that has said structure and be scheduled to of desired amt in advance in factory, this concrete slab P that precoats is formed and will be installed in the top of each longeron 2 by concrete material.That is, in the step of precoating, a plurality of bracing pieces 22 and 25 longitudinally are arranged in the rectangle frame with desired depth with vertical direction.Truss frame 23 is arranged on and the symmetrical position at center longitudinally, and outstanding long square box.Then, concrete is injected rectangle frame and solidifying.
As shown in Figure 2, a plurality of longerons 2 uniformly-spaced are parallel to each other is positioned over two adjacent bridge piers, 1 top, and bridge pier 1 is established with predetermined space.Then, as shown in Figure 3, comprise the bridge floor transport vehicle 10 of rail and support column 11 and the top that crane 12 is installed on two longerons of closely arranging 2.Use messenger wire 13 the crane 12 of bridge floor transport vehicle sling and the state of fixed cross beam mould 3a under, bridge floor transport vehicle 10 vertically moves along longeron 2, and reduces crossbeam mould 3a and make it be installed to the position of each expectation.Concrete is injected crossbeam mould 3a, thereby each crossbeam 3 forms with predetermined space between longeron 2.After concrete setting, remove crossbeam mould 3a, thereby finish construction.According to the type of employed bridge floor transport vehicle 10, can not need to use the structure that is used to install bridge floor transport vehicle 10, such as rail and support column.
As shown in Figure 1, after crossbeam 3 forms, carry out mortar coating step, wherein adhesive mortar 30 is applied to all surfaces of the longeron that contacts with the concrete slab P that precoats with suitable thickness.Therefore, because the longeron 2 and the concrete slab P that precoats can interfix, the concrete slab P that precoats can stably not install slidably.Owing to can finish mortar coating step simply by screed is solidified with suitable thickness in the size in available place, therefore can avoid in the prior art because recess forms the structure weakness of the concrete slab of precoating that is brought.
As shown in Figure 4, after all crossbeams 3 build up, bridge floor transport vehicle 10 sling regularly on the messenger wire 13 of crane 12, Manufactured precoat concrete slab P and vertically moving along longeron 2.The concrete slab P that precoats is installed in the correct position of the upper shed portion that is formed by longeron 2 and crossbeam 3 one by one.As shown in Figure 1, the concrete slab P that precoats places with certain orientation, thereby truss frame 20 is vertical with longeron 2.Because the concrete slab P that precoats is contained in the adhesive mortar 30, the concrete slab P that precoats is fixed on longeron 2 and the crossbeam 3 after at the fixed time.After the concrete slab P that precoats installed end, the connecting portion of the concrete slab P that precoats carries out caulking joint with silicon to be handled, thereby prevented the leakage of mortar when placing concrete, had also prevented the separation of concrete material simultaneously.
As shown in Figure 5, after the installation of finishing the concrete slab P that precoats, remove the bridge floor transport vehicle 10 that is installed in longeron 2 tops.Top at the concrete slab P that precoats is provided with bracing piece, and injects concrete thereon to be frozen into bridge plate 4.Behind reasonable time, precoat concrete slab P and bridge plate 4 are coupled fully integratedly, thereby form compound bridge plate structure, finish whole work of the construction method according to the present invention thus.
Industrial usability
As top description, the use according to the present invention method that the bridge plate of concrete slab is built of precoating has been eliminated the inconvenience of building on the top of bridge in the conventional building course of bridge plate, for example installation frame and scaffold and remove framework after concrete setting.Owing to need not to be operated on the scaffold, fall such as slipping etc. and to cause unexpected possibility to be minimized.With the conventional method of using framework relatively, the work period of the present invention can reduce 50-70%, thereby improves operating efficiency and build required expense and also reduced 15% at least.
In addition, according to design standard, the performance and the safety of bridge have further been improved by using the pre-pouring concrete of high strength by above-mentioned test.When fracture tired out takes place bridge plate, discern because the crack of the concrete slab of precoating bottom resulting from can make with the naked eye, thereby can carry out maintenance and repair apace bridge.Therefore, can prevent as the collapse fearful accident of a class of bridge.
Though this paper, it will be understood by those skilled in the art that the form in the spirit and scope of the present invention that do not deviate from additional claim definition can have different variations with details especially with reference to preferred embodiment showing and having described invention.
Claims (7)
1. method of building the bridge plate of bridge, wherein,
A plurality of longerons uniformly-spaced are positioned over the upper surface of the adjacent bridge pier of establishing with predetermined space in parallel to each other; A plurality of crossbeams are formed between the described longeron with predetermined space; A plurality of lattice bars bridge floor shapes of precoating respectively according to predetermined dimension and number concrete slab of precoating promotes and delivery by the bridge floor transport vehicle, to install near the top of described longeron in parallel to each other according to desired number; Inject concrete be set at the top of the described concrete slab of precoating that forms base plate at a plurality of bracing pieces after, thereby solidify with compound bridge plate that the described concrete slab of precoating forms one;
Wherein, in described lattice bars bridge floor shape is precoated the process of precoating of concrete slab,
A plurality of bracing pieces are arranged in the rectangular frame with desired depth, and described a plurality of bracing pieces are provided with at vertical and horizontal orthogonally with predetermined interval;
A plurality of truss frames are configured to give prominence to predetermined altitude from described rectangular frame in two positions with respect to longitudinal center's symmetry; And
Concrete injected and freeze solidly on described rectangular frame, thereby according to the design standard of first Pretesting, the described concrete slab of precoating is kept above the high strength of described bridge plate compressive strength.
2. the compressive strength of the method for claim 1, wherein working as described bridge plate is 270-400kgf/cm
2During particular value in the scope, the compressive strength of the described concrete slab of precoating is manufactured to the value of the compressive strength that is kept above described bridge plate.
3. the method for claim 1, the described preceding step of concrete slab of precoating is installed further to be comprised, smear the mortar of suitable thickness at all surfaces of the longeron that contacts with the described concrete slab of precoating, thereby the described concrete slab of precoating can be from the upper surface landing of described longeron with regard to stably installing, and keeps enough contact area to be fixed together.
4. a lattice bars bridge floor shape that is used to build the bridge plate of bridge concrete slab of precoating, the described concrete slab of precoating comprises:
The rectangular slab main body, be designed to be kept above bridge plate compressive strength from compressive strength, and adopt the method for precoating manufacturing according to design standard;
A plurality of main bracing pieces and distribute bracing piece, with predetermined space longitudinally with quadrature transverse ground berry in the plate main body;
A plurality of truss frames, part berry are between described main bracing piece, and setting in parallel to each other longitudinally, and outstanding from the upper surface portion of described position main body.
5. the concrete slab of precoating as claimed in claim 4, wherein, when the compressive strength of described bridge plate is 270-400kgf/cm
2During particular value in the scope, the compressive strength of the described concrete slab of precoating is manufactured to the value of the compressive strength that is kept above described bridge plate.
6. the concrete slab of precoating as claimed in claim 4, wherein, the thickness of described plate main body is at least 50mm, is no more than 60% of compound bridge plate thickness simultaneously.
7. the concrete slab of precoating as claimed in claim 4, wherein said truss frame comprises:
Two bottom bracing pieces are with the both sides of the predetermined main bracing piece that is arranged at intervals at the center;
Lattice bars, at predetermined height above the center between the bracing piece of described bottom, and along described plate main body upper surface of vertically exposing of described plate main body; And
Just silk, crooked incessantly repeatedly and be welded to each bottom bracing piece along the hypotenuse that forms by bottom bracing piece and lattice bars, thus the trussed construction of bottom bracing piece and lattice bars formation one.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2004-0090300 | 2004-11-08 | ||
| KR1020040090300 | 2004-11-08 | ||
| KR20040090300A KR100635137B1 (en) | 2004-11-08 | 2004-11-08 | Bridge slab construction method and lattice bar deck-shaped precast concrete plate applied therein |
| PCT/KR2005/001374 WO2006049377A1 (en) | 2004-11-08 | 2005-05-11 | Bridge slab construction method and lattice bar deck-shaped precast concrete plate applied thereto |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101057039A true CN101057039A (en) | 2007-10-17 |
| CN101057039B CN101057039B (en) | 2010-11-24 |
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| CN2005800381252A Expired - Fee Related CN101057039B (en) | 2004-11-08 | 2005-05-11 | Bridge slab construction method and lattice bar deck-shaped precast concrete plate applied therein |
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| Country | Link |
|---|---|
| KR (1) | KR100635137B1 (en) |
| CN (1) | CN101057039B (en) |
| WO (1) | WO2006049377A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090007052A (en) * | 2007-07-13 | 2009-01-16 | 최재옥 | Bridge slab construction method without support |
| KR100978882B1 (en) * | 2007-11-13 | 2010-08-31 | 지에스건설 주식회사 | Cantilever precast deckplate for composite slab and bridge construction method using the same |
| KR101045929B1 (en) | 2010-10-27 | 2011-07-01 | 홍석희 | Pro-environment prestressed long span light-weight precast concrete panel and this construction technique |
| CN102011364B (en) * | 2010-12-30 | 2012-02-29 | 长安大学 | Integral prefabricated cross-laminated timber (CLT) wooden plate girder bridge based on steel side stiffening |
| IT1404293B1 (en) * | 2011-02-02 | 2013-11-22 | D S D Dezi Steel Design S R L | METHOD FOR THE REALIZATION OF BRIDGE VARIABLE THICKNESS IN REINFORCED CONCRETE. |
| KR101101208B1 (en) | 2011-06-03 | 2012-01-04 | (주) 효성 | Precast deckplate for cantilever construction and slab construction method using the same |
| CN102507248B (en) * | 2011-11-09 | 2013-12-18 | 上海同豪土木工程咨询有限公司 | Method for testing whether bridge bearing has void |
| CN104294751B (en) * | 2014-09-24 | 2016-06-29 | 安徽建工集团有限公司 | Reinforcing structure for cross section of large-span prestressed concrete box girder |
| KR101954155B1 (en) | 2018-06-07 | 2019-03-05 | 컨텍이앤씨 주식회사 | Bridge with full-deck and protective wall, and construction method for the same |
| KR102257540B1 (en) | 2019-09-17 | 2021-05-31 | 한밭대학교 산학협력단 | Truss composite precast deck plate and construction method using it |
| CN112832117A (en) * | 2021-01-05 | 2021-05-25 | 中交路桥建设有限公司 | Connecting method of prefabricated box girder and transition layer and prefabricated box girder structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4282619A (en) * | 1979-11-16 | 1981-08-11 | Havens Steel Company | Truss structure |
| US5425152A (en) * | 1992-08-14 | 1995-06-20 | Teron International Building Technologies Ltd. | Bridge construction |
| KR100194083B1 (en) * | 1996-01-30 | 1999-06-15 | 이영선 | Top plate mounting structure of bridge |
| GB2367526B (en) * | 2000-10-03 | 2004-09-15 | Intelligent Engineering | Sandwich plate panels |
| JP3176309B2 (en) * | 1997-03-10 | 2001-06-18 | 飛島建設株式会社 | Precast concrete slab for bridge structure and joining method thereof |
| JP2001011821A (en) * | 1999-06-30 | 2001-01-16 | Kondo Kozai Kk | Space truss with provisional concrete form for civil engineering work such as bridge floor |
| KR100403989B1 (en) * | 2000-09-23 | 2003-11-01 | (주)천일기술단 | Bridge slab construction method and precast concrete plate applied therein |
-
2004
- 2004-11-08 KR KR20040090300A patent/KR100635137B1/en active IP Right Grant
-
2005
- 2005-05-11 CN CN2005800381252A patent/CN101057039B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101057039B (en) | 2010-11-24 |
| WO2006049377A1 (en) | 2006-05-11 |
| KR100635137B1 (en) | 2006-10-17 |
| KR20060040997A (en) | 2006-05-11 |
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