CN113863140A - Steel-concrete composite beam suitable for integral carrying installation and construction method thereof - Google Patents
Steel-concrete composite beam suitable for integral carrying installation and construction method thereof Download PDFInfo
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- CN113863140A CN113863140A CN202111027486.4A CN202111027486A CN113863140A CN 113863140 A CN113863140 A CN 113863140A CN 202111027486 A CN202111027486 A CN 202111027486A CN 113863140 A CN113863140 A CN 113863140A
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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
- 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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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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
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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
- E01D2101/30—Metal
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- Structural Engineering (AREA)
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Abstract
The invention discloses a steel-concrete composite beam suitable for integral pack installation and a construction method thereof, a roof support system is erected in a trough beam to provide stable support for the construction of a bridge deck directly above the trough beam, flange plate support systems are erected on the outer sides of two sides of the trough beam to provide support for the construction of flange plates of the bridge deck, and a support system is not erected below a bottom plate of the trough beam, so that before and after the whole steel-concrete composite beam is jacked in a subsequent pack stage, the stress state of the bridge deck is unchanged, the construction safety of the bridge deck is ensured, the situation that the bridge deck is deformed and cracked due to the fact that the support system is also arranged below the bottom plate of the trough beam in advance in the prior art when the steel-concrete composite beam is jacked is avoided, meanwhile, an end diaphragm and a transverse diaphragm are arranged in the trough beam, an end beam and a middle beam are connected and arranged between a pair of trough beams, and the rigidity of each internal structure of the steel-concrete composite beam is enhanced, the steel-concrete composite beam can be suitable for integral carrying installation, so that the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of bridge construction. More particularly, the present invention relates to a steel-concrete composite beam suitable for integral carrying installation and a construction method thereof.
Background
The composite structure bridge is a reasonable structure system which can give full play to performance advantages of various materials, wherein a steel-concrete structure is the most classical combination form, steel-concrete composite beams are widely applied to bridge structures, when the bridge is constructed, along with increasing traffic flow, the surrounding environment is complex, the construction safety of new beam erection and the influence on the surrounding environment and traffic flow need to be ensured, most of the existing steel-concrete composite beams are assembled on site, the rigidity of the whole structure is not high, the safety of structure construction is influenced, and meanwhile, the construction efficiency is low due to the limitation of sites and conditions of construction sites.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a steel-concrete composite beam suitable for integral carrying installation and a construction method thereof, so as to improve the integral structural rigidity of the steel-concrete composite beam, ensure the structural safety, ensure that the steel-concrete composite beam is suitable for integral carrying installation and improve the construction efficiency.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a steel-concrete composite girder adapted for integral piggyback installation, comprising:
the trough beam is of a steel structure and is provided with a pair of trough beams side by side, two ends of the inner side of each trough beam are respectively and fixedly provided with an end clapboard, a plurality of transverse clapboards are uniformly fixed between the two end clapboards in each trough beam at intervals along the length direction of the trough beam, an end cross beam and a middle cross beam are connected between the pair of trough beams, the end cross beam is respectively arranged at two ends of the trough beam, the middle cross beam is uniformly arranged between the two end cross beams at intervals, and the top of a web plate of each trough beam is provided with a shear connector;
and the bridge deck is of a concrete structure and is arranged on the upper surfaces of the pair of channel beams, and the bridge deck and the channel beams are connected into a whole through a shear connector.
Preferably, the end cross beams and the two end partition plates located at the corresponding ends are arranged in the same vertical plane, each middle cross beam and one diaphragm plate located in one pair of trough beams are located in the same vertical plane, and the arrangement interval of the middle cross beams is twice that of the diaphragm plates.
Preferably, a plurality of stiffening ribs are arranged at intervals on the inner side of each web of the trough beam, and the stiffening ribs are arranged in parallel to the width direction of the trough beam.
Preferably, the diaphragm plate comprises a horizontal support and a pair of inclined supports, two ends of the horizontal support are respectively and fixedly connected to the inner sides of the two corresponding webs of the trough beam, the upper ends of the pair of inclined supports are respectively fixed to the middle of the horizontal support, and the lower ends of the pair of inclined supports are respectively fixed to the inner sides of the two corresponding webs of the trough beam.
The invention also provides a construction method of the steel-concrete composite beam suitable for integral carrying installation, the steel-concrete composite beam is quickly installed on the vehicle-mounted supporting system, and the construction method specifically comprises the following steps:
s1, supporting each steel-concrete composite beam on a pair of vehicle-mounted supporting systems arranged along the length direction of the steel-concrete composite beam to complete whole span prefabrication;
s2, enabling the transport vehicle to enter the bottoms of the pair of vehicle-mounted supporting systems, and synchronously jacking the vehicle-mounted supporting systems, so that the steel-concrete composite beam is carried, and the system conversion is completed;
s3, carrying the steel-concrete composite beam by the transport vehicle to a bridge site along a set path, and synchronously lowering the vehicle-mounted support system after accurate positioning to enable the steel-concrete composite beam to fall on a bridge support;
s4, continuously reducing the height of the vehicle-mounted support system to enable the vehicle-mounted support system to be completely separated from the reinforced concrete composite beam, and then removing the vehicle-mounted support system;
and S5, constructing the expansion joint of the bridge deck and the bridge deck continuously, and finishing the quick installation of all the steel-concrete composite beams.
Preferably, the lower end of the vehicle-mounted supporting system is provided with a bottom distribution beam, a space for a transport vehicle to pass through is arranged below the bottom distribution beam, a hump beam support is arranged on the bottom distribution beam, the trough beam is supported on the hump beam support, and the transport vehicle jacks the vehicle-mounted supporting system by jacking the bottom distribution beam.
Preferably, in the whole span prefabricating process, the trough beam is placed on the girder-carrying bracket, and the bridge deck slab construction comprises the following steps:
s101, aiming at the part of the bridge deck, which is positioned right above the trough beam, a top plate supporting system is erected in the trough beam;
s102, aiming at the part of the bridge deck, which is positioned outside the right upper part of the trough beam, a flange plate supporting system is erected on the outer side of the trough beam;
s103, paving templates of bridge decks on the upper end surfaces of the top plate supporting system and the flange plate supporting system;
s104, carrying out preloading on the top plate supporting system, the flange plate supporting system and the whole template by adopting sandbag piling to eliminate uneven settlement and inelastic deformation of the top plate supporting system and the flange plate supporting system;
and S105, binding reinforcing steel bars of the bridge deck, and pouring concrete to connect the bridge deck and the channel beam into a whole to form the steel-concrete composite beam.
Preferably, the top of the vehicle-mounted support system is provided with a steel structure girder arranged along the transverse bridge direction, and the steel structure girder is arranged at the diaphragm plate when the vehicle-mounted support system is arranged.
The invention at least comprises the following beneficial effects: the steel-concrete composite beam is provided with the end partition plate and the transverse partition plate inside the channel beam, the end cross beam and the middle cross beam are connected and arranged between a pair of channel beams, the rigidity of each structure inside the steel-concrete composite beam is enhanced, when the bridge deck of the steel-concrete composite beam is constructed, the top plate support system is erected inside the channel beam so as to provide stable support for the construction of the bridge deck right above the channel beam and ensure the structural rigidity inside the channel beam, the flange plate support systems are erected outside two sides of the channel beam so as to provide support for the construction of the bridge deck at the corresponding position, namely the flange plate of the bridge deck, the bottom of the channel beam is supported by the vehicle-mounted support system, therefore, before and after the whole steel-concrete composite beam is jacked by the carrier support in the subsequent carrying stage, the stress state of the bridge deck structure is unchanged, and the steel-concrete composite beam is different from the structure that the support system is also arranged below the bottom plate of the channel beam in the prior art, the steel-concrete composite beam is suitable for integral packing installation by ensuring the construction safety of the bridge deck and the whole structural rigidity of the steel-concrete composite beam, thereby improving the construction efficiency.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a side view structural view of a steel-concrete composite beam suitable for integral piggyback mounting according to the present invention;
FIG. 2 is a top view block diagram of a pair of trough beams of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 1;
FIG. 4 is a front view structural view of the steel-concrete composite beam suitable for integral piggyback installation of the present invention during the construction of a bridge deck;
fig. 5 is a side view structural view of the steel-concrete composite beam suitable for integral piggyback installation in the construction process of a bridge deck according to the present invention.
Fig. 6 is a front view structural view of the steel-concrete composite beam suitable for integral piggyback installation in the installation process of the invention.
The specification reference numbers indicate: 1. the steel-concrete composite beam comprises a channel beam, 2, end partition plates, 3, transverse partition plates, 4, a steel-concrete composite beam, 5, end cross beams, 6, a middle cross beam, 7, a bridge deck, 8, a shear connector, 9, a vehicle-mounted supporting system, 10, a horizontal support, 11, an inclined support, 12, a top plate supporting system, 13, a flange plate supporting system, 14, the ground, 15, a girder-carrying support, 16, bamboo plywood, 17, a transport vehicle, 18, a bottom distribution beam, 19 and a steel structure crossbeam.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It should be noted that the construction methods described in the following embodiments are all conventional methods in the art unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 6, the present invention provides a steel-concrete composite beam suitable for integral piggyback installation, comprising:
the trough beam comprises trough beams 1 which are of steel structures and are arranged side by side, two ends of the inner side of each trough beam 1 are respectively and fixedly provided with end clapboards 2, a plurality of transverse clapboards 3 are uniformly fixed between the two end clapboards 2 in each trough beam 1 at intervals along the length direction of the trough beam 1, an end cross beam 5 and a middle cross beam 6 are connected between the pair of trough beams 1, the end cross beam 5 is respectively arranged at two ends of the trough beam 1, the middle cross beam 6 is uniformly arranged between the two end cross beams 5 at intervals, and the top of a web plate of the trough beam 1 is provided with a shear connector 8;
and the bridge deck 7 is of a concrete structure and is arranged on the upper surfaces of the pair of channel beams 1, and the bridge deck 7 and the channel beams 1 are connected into a whole through a shear connector 8.
The channel beam 1 is of a U-shaped structure and is provided with a pair of webs and a bottom plate connected between the pair of webs, the pair of channel beams 1 and a bridge deck 7 at the upper end are connected through a shear connector 8 to form the steel-concrete composite beam integrally, so that the steel-concrete composite beam formed by the pair of channel beams 1 can be assembled firstly and then transported to a construction site, the transverse partition plate 3 and the end partition plate 2 are arranged in the channel beam 1, the end cross beam 5 and the middle cross beam 6 are arranged between the pair of channel beams 1, the structural rigidity of each part in the steel-concrete composite beam is enhanced, the resistance to torque is improved, the torque is resisted in the transportation process, the structure is stable, the steel-concrete composite beam can be suitable for integral transportation and installation, the construction efficiency is not limited by the construction site, and the construction efficiency is improved.
In another technical solution, as shown in fig. 1 and 2, the end cross beam 5 and two end bulkheads 2 located at corresponding ends are arranged in the same vertical plane, each middle cross beam 6 and one of the bulkhead 3 respectively located in a pair of trough beams 1 are located in the same vertical plane, and the arrangement interval of the middle cross beam 6 is twice the arrangement interval of the bulkhead 3.
The connection strength and rigidity of the end parts of the pair of channel beams 1 are enhanced by arranging the end cross beams 5 and the end partition plates 2, the end cross beams 5 and the end partition plates 2 are arranged in the same vertical plane, the overall connection is further enhanced, and the proportion of the interval arrangement of the middle cross beam 6 and the transverse partition plate 3 is doubled, so that the cost is reduced while the structural rigidity is improved, and the construction efficiency is improved.
In another technical solution, as shown in fig. 1 to 3, the diaphragm plate 3 includes a horizontal support 10 and a pair of inclined supports 11, two ends of the horizontal support 10 are respectively and fixedly connected to the inner sides of two webs of the corresponding trough beam 1, the upper ends of the pair of inclined supports 11 are respectively and fixedly connected to the middle of the horizontal support 10, and the lower ends of the pair of inclined supports 11 are respectively and fixedly connected to the inner sides of two webs of the corresponding trough beam 1.
Through the cooperation of the horizontal support 10 and the pair of inclined supports 11, a K-shaped connecting structure is formed in the trough beam 1, the internal structural strength of the trough beam 1 is improved, the installation is convenient, the structure is simple, and the cost is low.
As shown in fig. 5 to 6, the present invention further provides a construction method of a steel-concrete composite beam suitable for integral piggyback installation, wherein the steel-concrete composite beam is quickly installed on a vehicle-mounted supporting system 9, and the method specifically includes the following steps:
and S1, supporting each steel-concrete composite beam on a pair of vehicle-mounted supporting systems 9 arranged along the length direction of the steel-concrete composite beam to complete the whole span prefabrication. The whole span prefabrication also comprises the construction of auxiliary facilities such as a bridge deck guardrail, a drainage system and the like.
S2, the transport vehicle 17 enters the bottoms of the pair of vehicle-mounted supporting systems 9, and the vehicle-mounted supporting systems 9 are synchronously jacked, so that the steel-concrete composite beam is carried, and the system conversion is completed.
S3, the transport vehicle 17 carries the steel-concrete composite beam to the bridge site along the set path, and the vehicle-mounted support system 9 is synchronously lowered after accurate positioning, so that the steel-concrete composite beam falls on the bridge support.
And S4, continuously lowering the height of the vehicle-mounted supporting system 9 to completely separate the vehicle-mounted supporting system 9 from the steel-concrete composite beam, and then removing the vehicle-mounted supporting system 9.
And S5, constructing the expansion joint of the bridge deck and the bridge deck continuously, and finishing the quick installation of all the steel-concrete composite beams.
When the bridge deck 7 is cast in place, the channel beam 1 is supported on the vehicle-mounted supporting system 9 instead of being supported in a full space, the cast-in-place bridge deck on the cantilever beam can ensure that the bridge deck 7 cannot crack due to large tensile stress caused by system conversion after the steel-concrete composite beam jacks up the beam body of the steel-concrete composite beam 4 by the transport vehicle 17, then the transport vehicle is driven into the bottom of the vehicle-mounted supporting system to jack up the vehicle-mounted supporting system to enable the vehicle-mounted supporting system to leave the ground, and the transport vehicle carries the vehicle-mounted supporting system and the steel-concrete composite beam together, so that the efficiency of bridge construction by using the steel-concrete composite beam is obviously improved.
In another scheme, a bottom distribution beam 18 is arranged at the lower end of the vehicle-mounted support system 9, a space for a transport vehicle 17 to pass through is arranged below the bottom distribution beam 18, a hump beam bracket is arranged on the bottom distribution beam 18, the trough beam is supported on the hump beam bracket, and the transport vehicle 17 jacks the vehicle-mounted support system 9 by jacking the bottom distribution beam 18. Further, the top of the vehicle-mounted supporting system 9 is provided with a steel structure girder 19 arranged along the transverse bridge direction, and when the vehicle-mounted supporting system 9 is provided, the steel structure girder 19 is arranged at the diaphragm plate 3.
In another alternative, as shown in fig. 4-6, the trough beam 1 is supported on a piggyback bracket 15 of the vehicle-mounted support system 9, and the construction of the bridge deck 7 comprises the following steps:
s101, building a top plate supporting system 12 in the trough beam 1 aiming at the part, located right above the trough beam 1, of the bridge deck 7.
Set up during roof braced system 12, with the bottom plate inboard of channel beam 1 is the strong point, sets up first steel pipe scaffold, and steel pipe scaffold includes along the first pole setting of horizontal bridge to the interval setting and along the second pole setting of vertical bridge to the interval setting, and the interval that sets up of first pole setting is 39 ~ 40cm, and the interval that sets up of second pole setting is 1.5m, and the below of first pole setting, second pole setting is provided with the template strip that 8cm is thick respectively, and in the direction of height, interval 1.5m sets up one row of vertical bridge respectively to, the hookup scaffold steel pipe of horizontal bridge, makes all first pole settings, second pole settings ally oneself with and becomes whole.
And S102, building a flange plate supporting system 13 on the outer side of the trough beam 1 aiming at the part of the bridge deck 7, which is positioned outside the position right above the trough beam 1.
Set up during flange board braced system 13 to ground 14 is the strong point, sets up second steel pipe scaffold, and second steel pipe scaffold includes along the third pole setting that the cross-bridge set up to the interval and along the fourth pole setting that the longitudinal bridge set up to the interval, the third pole setting set up interval 20 ~ 40cm, the fourth pole setting interval is 1.2m, in the direction of height, interval 1.5m sets up one row of longitudinal bridge to hookup scaffold steel pipe respectively, make all third pole settings, the fourth pole setting is linked into wholly, set up the bridging in succession at longitudinal bridge and cross-bridge simultaneously.
Specifically, the cross braces comprise vertical cross braces and horizontal cross braces, the vertical cross braces extend to the top along the bottom of the flange plate supporting system 13, the vertical cross braces are provided with 6 rows at intervals in the transverse bridge direction, each row extends in the longitudinal bridge direction, the flange plate supporting system 13 is divided into three sections of supporting frames which are positioned outside the pair of trough beams 1 and between the pair of trough beams 1, two rows of vertical cross braces are respectively arranged on two sides of each section of supporting frame in the transverse bridge direction, one row of vertical cross braces are arranged in the longitudinal bridge direction at intervals of 3.6m, the horizontal cross braces are arranged at the positions 144.5m higher than the ground, and all the vertical cross braces and the horizontal cross braces avoid the girder-bearing support 15.
And S103, laying templates of the bridge deck 7 on the upper end surfaces of the top plate supporting system 12 and the flange plate supporting system 13. The bridge deck 7 is cast in situ and assembled by adopting bamboo plywood 16+8cm thick wood beams with the thickness of 15mm, and the thickness of each wood beam is 1m23 pieces of horizontal and longitudinal wood are arranged in the range.
S104, carrying out sand bag piling and preloading on the whole of the top plate supporting system 12, the flange plate supporting system 13 and the template so as to eliminate uneven settlement and inelastic deformation of the top plate supporting system 12 and the flange plate supporting system 13.
Further, the preloading is carried out in 3 levels, the loads sequentially applied are 60%, 80% and 100% of the value of the preloading load in the unit, after each level is loaded, the settlement amount of the top plate supporting system 12 and the settlement amount of the flange plate supporting system 13 are monitored at intervals of 12h, and when the average value of the settlement difference of the measuring points for 2 continuous times is smaller than 2mm, the next level of loading is continued.
S105, binding reinforcing steel bars of the bridge deck 7, and pouring concrete to connect the bridge deck 7 and the channel beam 1 into a whole to form the steel-concrete composite beam. When the beam body steel bars collide with the shear connectors 8 such as shear nails, the common beam body steel bars are properly moved or are properly bent, the steel-concrete composite beam bridge deck 7 is made of C50 concrete, and the single span square amount is about 112.6m3Concrete is composed of main bagThe mixing station is provided, and the binding steel bars and the pouring of the concrete can be realized by adopting the existing construction method.
When the steel-concrete composite beam is integrally carried and installed, the channel beam 1 is assembled and supported on the site of the precast beam by using the vehicle-mounted support system 9, the bridge deck template is supported by the assembled beam support system which comprises a top plate support system 12 and a flange plate support system 13, and finally the bridge deck 7 and the channel beam 1 are connected into a whole, namely the steel-concrete composite beam.
In summary, in the invention, when the bridge deck slab construction of the steel-concrete composite beam is performed, the top plate support system is erected in the channel beam to provide stable support for the bridge deck slab construction right above the channel beam and ensure the structural rigidity in the channel beam, the flange plate support systems are erected outside the two sides of the channel beam to provide support for the bridge deck slab construction of the corresponding position, namely the flange plate of the bridge deck slab, and the support system is not erected below the bottom plate of the channel beam, so that before and after the whole steel-concrete composite beam is jacked by the girder-carrying bracket in the subsequent packing stage, the stressed state of the bridge deck slab structure is unchanged, which is different from the prior art that the support system support bottom plate is also arranged below the bottom plate of the channel beam, so that the channel beam is not stressed before the whole jacking, and when the channel beam is jacked, the bridge deck slab is deformed and cracked due to tension, and the structural safety of the bridge deck slab is affected, and in addition, the end partition plate is arranged in the channel beam, The transverse partition plate is connected and provided with the end cross beam and the middle cross beam between the pair of channel beams, so that the rigidity of each structure in the steel-concrete composite beam is enhanced.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. The steel-concrete composite beam suitable for integral carrying installation is characterized by comprising:
the trough beam is of a steel structure and is provided with a pair of trough beams side by side, two ends of the inner side of each trough beam are respectively and fixedly provided with an end clapboard, a plurality of transverse clapboards are uniformly fixed between the two end clapboards in each trough beam at intervals along the length direction of the trough beam, an end cross beam and a middle cross beam are connected between the pair of trough beams, the end cross beam is respectively arranged at two ends of the trough beam, the middle cross beam is uniformly arranged between the two end cross beams at intervals, and the top of a web plate of each trough beam is provided with a shear connector;
and the bridge deck is of a concrete structure and is arranged on the upper surfaces of the pair of channel beams, and the bridge deck and the channel beams are connected into a whole through a shear connector.
2. The steel-concrete composite beam suitable for integral piggyback mounting of claim 1, wherein said end beams are disposed in a same vertical plane as two of said end bulkheads at corresponding ends, each of said middle beams is disposed in a same vertical plane as one of said diaphragms in a pair of said channel beams, respectively, and said middle beams are disposed at an interval twice as large as an interval at which said diaphragms are disposed.
3. The steel-concrete composite beam suitable for integral piggyback mounting of claim 1, wherein a plurality of stiffening ribs are provided at intervals inside each web of said trough beam, the stiffening ribs being provided in parallel to the width direction of said trough beam.
4. The steel-concrete composite beam suitable for integral piggyback mounting of claim 1, wherein said diaphragm comprises a horizontal brace and a pair of diagonal braces, both ends of the horizontal brace are respectively and fixedly connected to the inner sides of two webs of the corresponding said trough beam, the upper ends of the pair of diagonal braces are respectively fixed to the middle of the horizontal brace, and the lower ends of the pair of diagonal braces are respectively fixed to the inner sides of two webs of the corresponding said trough beam.
5. The construction method of the steel-concrete composite beam suitable for integral piggyback installation of any one of claims 1 to 4, wherein the steel-concrete composite beam is rapidly installed on a vehicle-mounted supporting system, and the method comprises the following steps:
s1, supporting each steel-concrete composite beam on a pair of vehicle-mounted supporting systems arranged along the length direction of the steel-concrete composite beam to complete whole span prefabrication;
s2, enabling the transport vehicle to enter the bottoms of the pair of vehicle-mounted supporting systems, and synchronously jacking the vehicle-mounted supporting systems, so that the steel-concrete composite beam is carried, and the system conversion is completed;
s3, carrying the steel-concrete composite beam by the transport vehicle to a bridge site along a set path, and synchronously lowering the vehicle-mounted support system after accurate positioning to enable the steel-concrete composite beam to fall on a bridge support;
s4, continuously reducing the height of the vehicle-mounted support system to enable the vehicle-mounted support system to be completely separated from the reinforced concrete composite beam, and then removing the vehicle-mounted support system;
and S5, constructing the expansion joint of the bridge deck and the bridge deck continuously, and finishing the quick installation of all the steel-concrete composite beams.
6. The method as claimed in claim 5, wherein the lower end of the vehicle-mounted support system is provided with a bottom distribution beam, a space for a transport vehicle to pass through is arranged below the bottom distribution beam, the bottom distribution beam is provided with a hump beam support, the trough beam is supported on the hump beam support, and the transport vehicle jacks the vehicle-mounted support system by jacking the bottom distribution beam.
7. The construction method of the steel-concrete composite beam suitable for integral piggyback installation of claim 6, wherein the trough beam is placed on the piggyback support during the whole span prefabrication process, and the construction of the bridge deck comprises the following steps:
s101, aiming at the part of the bridge deck, which is positioned right above the trough beam, a top plate supporting system is erected in the trough beam;
s102, aiming at the part of the bridge deck, which is positioned outside the right upper part of the trough beam, a flange plate supporting system is erected on the outer side of the trough beam;
s103, paving templates of bridge decks on the upper end surfaces of the top plate supporting system and the flange plate supporting system;
s104, carrying out preloading on the top plate supporting system, the flange plate supporting system and the whole template by adopting sandbag piling to eliminate uneven settlement and inelastic deformation of the top plate supporting system and the flange plate supporting system;
and S105, binding reinforcing steel bars of the bridge deck, and pouring concrete to connect the bridge deck and the channel beam into a whole to form the steel-concrete composite beam.
8. The construction method of the steel-concrete composite beam suitable for integral piggyback installation of claim 6, wherein the top of the vehicle-mounted support system is provided with steel structure girders arranged along a transverse bridge direction, and the steel structure girders are arranged at the diaphragm plate when the vehicle-mounted support system is provided.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102203346A (en) * | 2010-01-29 | 2011-09-28 | 边炯均 | Construction method of steel composite girder bridge |
| CN110409319A (en) * | 2019-08-16 | 2019-11-05 | 中铁十四局集团第三工程有限公司 | A kind of cast-in-place floorings bracket of large span steel reinforced concrete combination beam and construction method |
| CN212128810U (en) * | 2019-11-14 | 2020-12-11 | 中交第一公路勘察设计研究院有限公司 | UHPC corrugated steel web narrow steel box type composite beam |
| CN112411390A (en) * | 2020-11-30 | 2021-02-26 | 中交路桥建设有限公司 | Concrete bracket for bridge deck of steel-concrete composite beam and construction method thereof |
| CN113005908A (en) * | 2021-02-22 | 2021-06-22 | 广东冠粤路桥有限公司 | Installation method of overline overbridge |
-
2021
- 2021-09-02 CN CN202111027486.4A patent/CN113863140A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102203346A (en) * | 2010-01-29 | 2011-09-28 | 边炯均 | Construction method of steel composite girder bridge |
| CN110409319A (en) * | 2019-08-16 | 2019-11-05 | 中铁十四局集团第三工程有限公司 | A kind of cast-in-place floorings bracket of large span steel reinforced concrete combination beam and construction method |
| CN212128810U (en) * | 2019-11-14 | 2020-12-11 | 中交第一公路勘察设计研究院有限公司 | UHPC corrugated steel web narrow steel box type composite beam |
| CN112411390A (en) * | 2020-11-30 | 2021-02-26 | 中交路桥建设有限公司 | Concrete bracket for bridge deck of steel-concrete composite beam and construction method thereof |
| CN113005908A (en) * | 2021-02-22 | 2021-06-22 | 广东冠粤路桥有限公司 | Installation method of overline overbridge |
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