CN117468328A - Prestressed large cantilever inverted T-shaped variable cross section bent cap and construction method - Google Patents
Prestressed large cantilever inverted T-shaped variable cross section bent cap and construction method Download PDFInfo
- Publication number
- CN117468328A CN117468328A CN202311724210.0A CN202311724210A CN117468328A CN 117468328 A CN117468328 A CN 117468328A CN 202311724210 A CN202311724210 A CN 202311724210A CN 117468328 A CN117468328 A CN 117468328A
- Authority
- CN
- China
- Prior art keywords
- bracket
- bent cap
- radial
- stretching
- large cantilever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 69
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 239000010426 asphalt Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000009415 formwork Methods 0.000 abstract description 2
- 238000004873 anchoring Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- 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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
- E04G21/3266—Safety nets
-
- 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
- E01D2101/28—Concrete reinforced prestressed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a prestress large cantilever inverted T-shaped variable cross section bent cap and a construction method thereof, which adopts a radial bracket of a bracket or a bracket of a bracket-type scaffold, and provides the bracket-type scaffold which is used as a bracket system, thereby effectively ensuring the smooth construction of the large cantilever inverted T-shaped variable cross section bent cap; the radial bracket is used as a formwork structure, the upper part of the radial telescopic bracket diagonal brace can be selectively connected with different radial bracket diagonal brace connection points according to the length of the bent cap cantilever, and the applicability of the radial bracket diagonal brace is effectively expanded; the telescopic operation platform is hung by the prefabricated stretching anchor ear bent cap, the upper position and the lower position of the telescopic operation platform are controlled by the control end of the telescopic device, stretching steel bundles are stretched and anchored in the notches on the two sides of the large cantilever bent cap, and the prestress stretching construction efficiency is effectively improved.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a prestress large cantilever inverted T-shaped variable cross section bent cap and a construction method thereof.
Background
In recent years, with the continuous improvement of the economic level of China, the urban process is accelerated, the urban scale is continuously enlarged, and the construction of expressways and viaducts is increased to improve the traffic efficiency of motor vehicles and solve the problem of road congestion. Compared with the traditional rectangular bent cap, the inverted T-shaped bent cap structure system can effectively reduce the exposed height of the structure below the main girder by hiding part of the bent cap structure into the height range of the prefabricated simply supported small box girder, and can remarkably improve the utilization rate of the space under the bridge, save the construction cost and improve the appearance of the bridge if being combined with the design of the large cantilever. However, the complex structural form, neglect in design details or deviation in the construction process often affect the service performance of the structure itself or corresponding accessory components, and further have great influence on the applicability, durability and safety of the structure. Accordingly, there is a need for a variable cross-section capping beam construction method to solve the above problems.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a prestress large cantilever inverted T-shaped variable cross section bent cap and a construction method.
The construction method of the prestress large cantilever inverted T-shaped variable cross section bent cap adopts a radial bracket of a bracket or a disk buckle type scaffold as a bracket system, and comprises the following steps:
sequentially constructing a bearing platform and pier columns on the upper part of the cast-in-place pile, and pouring a concrete foundation on the upper part of the bearing platform to be connected with the original asphalt pavement;
when the disc-buckling type scaffold is used as a bracket system, a disc-buckling type scaffold is erected on a concrete foundation and an original asphalt pavement, and an adjustable jacking is arranged at the upper part of the disc-buckling type scaffold;
when the radial bracket is used as a bracket system, a pier stud hoop bracket is applied to a pier stud for supporting a radial bracket beam, and a supporting frame is arranged on the radial bracket beam;
step three, when a disc buckle type scaffold is adopted as a bracket system, a cover beam lower-layer bottom template is arranged on an adjustable jacking, and when a radial bracket is adopted as the bracket system, the cover beam lower-layer bottom template is arranged on a support frame; sequentially constructing a lower cover beam and an upper cover beam, and arranging a stretching steel beam to form a large cantilever cover beam;
and step four, stretching the stretching steel bundles and sealing anchors on two sides of the large cantilever bent cap.
In the first step, the lower bridge structure comprises a filling pile, a bearing platform is constructed on the upper portion of the filling pile, a pier stud is constructed on the bearing platform, backfill sand gravel is backfilled in the bearing platform foundation pit, then a concrete foundation is poured on the upper portion of the backfill sand gravel, and the concrete foundation is horizontally connected with an original asphalt pavement.
In the second step, when the disc-buckling scaffold is used as a support system, the disc-buckling scaffold comprises upright rods, the bottoms of the upright rods are provided with bottom supports, the upper parts of the upright rods are provided with adjustable top supports, the upright rods are connected through four rows of transverse rods, and a plurality of scissor supports are arranged between the upright rods.
In the second step, when a radial bracket is used as a bracket system, the inner sides of two pier columns are connected in a reinforcing way through an inner connecting piece of a pier column hoop bracket, the outer sides of the two pier columns are connected in a reinforcing way through an outer connecting piece of the pier column hoop bracket, the pier column hoop bracket supports a radial bracket cross beam through a radial telescopic bracket diagonal brace, the lower part of the radial telescopic bracket diagonal brace is connected with the pier column hoop bracket through an outer connecting piece of the pier column hoop bracket, a plurality of radial bracket diagonal brace connecting points are arranged on the radial bracket cross beam, the upper parts of the radial telescopic bracket diagonal braces are connected with different radial bracket diagonal brace connecting points according to the length of a bent cap cantilever, and the upper parts of the radial telescopic bracket diagonal braces are connected with corresponding radial bracket diagonal brace connecting points through radial bracket diagonal brace movable connecting pieces; a plurality of support I-beams are arranged on the radial bracket cross beam, and a support frame is arranged on the support I-beams.
In the step three, construction operation platforms are symmetrically arranged on two sides of the upper portion of the coiled scaffold, protective rails are arranged outside the construction operation platforms, and safety nets are arranged between the protective rails.
In the third step, after binding the steel bars of the lower-layer bent cap, constructing a lower-layer custom-made combined side steel mould of the bent cap, after the installation of the lower-layer custom-made combined side steel mould of the bent cap is completed, additionally installing a reinforcing and locking pull rod between the lower-layer custom-made combined side steel moulds of the bent cap, after the maintenance of the lower-layer bent cap is completed, binding the steel bars of the upper-layer bent cap, then installing the upper-layer custom-made combined side steel mould of the bent cap, additionally installing the reinforcing and locking pull rod after the installation of the upper-layer custom-made combined side steel mould of the bent cap is completed, and then pouring upper-layer bent cap concrete and maintaining.
Preferably, the fourth step is specifically: the two sides of the large cantilever bent cap are symmetrically provided with a group of prefabricated stretching anchor ear bent cap hanging telescopic operation platform and a construction platform anchor ear bent cap telescopic device respectively, the prefabricated stretching anchor ear bent cap hanging telescopic operation platform comprises a stretching construction platform support, the lower part of the construction platform anchor ear bent cap telescopic device is connected with the stretching construction platform support, the stretching construction platform support is additionally provided with a stretching construction platform diagonal bracing and a stretching construction platform bottom reinforcing diagonal bracing, the lower part of the construction platform support is provided with a stretching construction platform base, the construction platform support is provided with a telescopic device control end, and the upper position and the lower position of the prefabricated stretching anchor ear bent cap hanging telescopic operation platform are controlled through the telescopic device control end; the two sides of the large cantilever bent cap are provided with notches, and the stretching of the stretching steel beam is performed through the notches and the anchor is sealed.
The prestress large cantilever inverted T-shaped variable cross section bent cap is obtained by any one of the methods.
The beneficial effects of the invention are as follows:
1) The invention provides a disc-buckling scaffold which is used as a bracket system, and the smooth construction of a large cantilever inverted T-shaped variable cross section bent cap is effectively ensured.
2) The invention provides a radial bracket as a formwork structure, wherein the upper part of a radial telescopic bracket diagonal brace can be selectively connected with different radial bracket diagonal brace connection points according to the length of a bent cap cantilever, so that the applicability of the radial bracket diagonal brace is effectively expanded.
3) The invention develops a prefabricated stretching anchor ear bent cap hanging telescopic operation platform, wherein the control end of a telescopic device is used for controlling the upper and lower positions of the prefabricated stretching anchor ear bent cap hanging telescopic operation platform, stretching and anchoring of stretching steel bundles are carried out on notches on two sides of a large cantilever bent cap, and the prestress stretching construction efficiency is effectively improved.
Drawings
FIG. 1 is an elevation view of a structure of a disc buckle type scaffold and a variable section steel die;
fig. 2 is a plan view of a disc-buckle scaffold arrangement;
FIG. 3 is a schematic view of a radial bracket support form;
FIG. 4 is a schematic view of a prefabricated tensioned bent cap structure;
FIG. 5 is a schematic view of a prefabricated tension hoop bent cap hanging retractable operating platform;
fig. 6 is a schematic diagram of a slot pattern.
In the figure: the construction method comprises the following steps of 1-cast-in-place piles, 2-bearing platforms, 3-pier columns, 4-backfill sand gravel, 5-concrete foundations, 6-original asphalt pavements, 7-base supports, 8-vertical rods, 9-cross bars, 10-cross struts, 11-adjustable jacking, 12-construction operation platforms, 13-protection rails, 14-safety nets, 15-bent cap lower-layer bottom templates, 16-bent cap lower-layer custom combined side steel moulds, 17-reinforcement locking pull rods, 18-bent cap upper-layer custom combined side steel moulds, 19-lower-layer bent cap beams, 20-upper-layer bent cap beams, 21-pier column hoop supports, 22-pier column hoop support interconnects, 23-pier column hoop support interconnects, 24-radial telescopic bracket diagonal braces, 25-radial bracket diagonal brace connecting points, 26-radial bracket cross beams, 27-radial bracket diagonal brace movable connecting pieces, 28-support I steel, 29-support frames, 30-notch, 31-tensioned steel bundles, 32-construction platform hoop bent cap beam tensioning devices, 33-telescopic support brackets, 34-support diagonal braces, and 37-construction platform tensioning construction platforms, and 37-support end control telescopic support platforms.
Detailed Description
The invention is further described below with reference to examples. The following examples are presented only to aid in the understanding of the invention. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present invention without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
As an embodiment, as shown in fig. 1 to 6, the construction method of the prestressed large cantilever inverted T-shaped variable cross section bent cap mainly includes the following steps:
step one, construction of a bridge substructure: and constructing a bearing platform 2 on the upper part of the filling pile 1, constructing an pier column 3 on the bearing platform 2, backfilling sand gravel 4 in a foundation pit of the bearing platform 2, and then pouring a layer of concrete foundation 5 on the upper part of the backfill sand gravel 4, wherein the concrete foundation 5 is horizontally connected with an original asphalt pavement 6.
Step two, constructing a bracket system when the large cantilever inverted T-shaped variable cross section bent cap adopts a disk buckle type scaffold bracket system: the method comprises the steps of erecting a disc buckle type scaffold on a concrete foundation 5 and an original asphalt pavement 6, arranging a bottom bracket 7 at the lower part of a vertical rod 8, arranging an adjustable top bracket 11 at the upper part of the vertical rod 8, reinforcing and connecting the vertical rod 8 through four rows of cross rods 9, and arranging a plurality of scissor supports 10.
The large cantilever inverted T-shaped variable cross section bent cap is constructed by a bracket system when a radial bracket is adopted: the pier column 3 is provided with the pier column hoop support 21, the two pier column 3 inner sides are connected in a reinforcing way through the pier column hoop support inner connecting piece 22, the two pier column 3 outer sides are connected in a reinforcing way through the pier column hoop support outer connecting piece 23, the lower part of the radial telescopic bracket diagonal brace 24 is connected with the pier column hoop support 21 through the pier column hoop support outer connecting piece 23, the radial bracket beam 26 is provided with a plurality of radial bracket diagonal brace connecting points 25, the upper part of the radial telescopic bracket diagonal brace 24 can be connected with different radial bracket diagonal brace connecting points 25 according to the selection of the length of a capping beam cantilever, the upper part of the radial telescopic bracket diagonal brace 24 is connected with the corresponding radial bracket diagonal brace connecting points 25 through the radial bracket diagonal brace movable connecting piece 27, the radial bracket beam 26 is provided with a plurality of support I-beams 28, and the support I-beam 28 is provided with a support frame 29.
Step three, large cantilever inverted T-shaped variable cross section bent cap construction is performed when a disc buckle type scaffold support system is adopted: the construction method comprises the steps of arranging a bent cap lower-layer bottom template 15 on an adjustable jacking 11, symmetrically arranging construction operation platforms 12 on two sides of the upper part of a disc-buckling scaffold support system respectively, arranging a protective railing 13 outside the construction operation platforms 12, arranging a safety net 14 on the disc-buckling scaffold support system, constructing a bent cap lower-layer custom-made combined side steel mould 16 after binding steel bars of a lower-layer bent cap 19, installing a reinforcing locking pull rod 17 after installing the bent cap lower-layer custom-made combined side steel mould 16, pouring concrete and curing of the lower-layer bent cap 19, carrying out reinforcement cage binding of an upper-layer bent cap 20 after curing is completed on the lower-layer bent cap 19, installing a bent cap upper-layer custom-made combined side steel mould 18, installing a reinforcing locking pull rod 17 after installing the bent cap upper-layer custom-made combined side steel mould 18, and then pouring concrete and curing of the upper-layer bent cap 20.
When the radial bracket is adopted, the large cantilever inverted T-shaped variable cross section bent cap construction is carried out in the bracket system: the construction method comprises the steps of arranging a bent cap lower-layer bottom template 15 on a support frame 29, symmetrically arranging construction operation platforms 12 on two sides of the upper part of a coiled scaffold support system respectively, arranging a protective railing 13 outside the construction operation platforms 12, arranging a safety net 14 on the coiled scaffold support system, constructing a bent cap lower-layer custom-made combined side steel mould 16 after binding steel bars of a lower-layer bent cap 19, installing a reinforcing locking pull rod 17 after installing the bent cap lower-layer custom-made combined side steel mould 16, pouring concrete and curing of the lower-layer bent cap 19, carrying out reinforcement cage binding of an upper-layer bent cap 20 after curing, then installing a bent cap upper-layer custom-made combined side steel mould 18, installing a reinforcing locking pull rod 17 after installing the bent cap upper-layer custom-made combined side steel mould 18, and then pouring concrete and curing of the upper-layer bent cap 20.
Step four, prefabricating a telescopic operation platform hung on a stretching hoop bent cap and stretching construction: the method comprises the steps that prefabricated stretching anchor ear bent cap hanging telescopic operation platforms are symmetrically arranged on two sides of a large cantilever bent cap, construction platform anchor ear bent cap telescopic devices 32 are arranged on two sides of the large cantilever bent cap, a stretching construction platform support 33 is connected below the construction platform anchor ear bent cap telescopic devices 32, stretching construction platform diagonal braces 34 and stretching construction platform bottom reinforcing diagonal braces 36 are additionally arranged on the stretching construction platform support 33 to strengthen the integrity and stability of the operation platform, a stretching construction platform base 35 is arranged on the lower portion of the construction platform support 33, the upper position and the lower position of the prefabricated stretching anchor ear bent cap hanging telescopic operation platform are controlled through a telescopic device control end 37, and stretching and anchoring of stretching steel bundles 31 are conducted on notch 30 on two sides of the large cantilever bent cap.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by a difference from other embodiments, and identical and similar parts between the embodiments are referred to each other.
Claims (8)
1. The construction method of the prestress large cantilever inverted T-shaped variable cross section bent cap is characterized by adopting a radial bracket of a bracket or a disc buckle type scaffold as a bracket system and comprising the following steps of:
sequentially constructing a bearing platform and pier columns on the upper part of the cast-in-place pile, and pouring a concrete foundation on the upper part of the bearing platform to be connected with the original asphalt pavement;
when the disc-buckling type scaffold is used as a bracket system, a disc-buckling type scaffold is erected on a concrete foundation and an original asphalt pavement, and an adjustable jacking is arranged at the upper part of the disc-buckling type scaffold;
when the radial bracket is used as a bracket system, a pier stud hoop bracket is applied to a pier stud for supporting a radial bracket beam, and a supporting frame is arranged on the radial bracket beam;
step three, when a disc buckle type scaffold is adopted as a bracket system, a cover beam lower-layer bottom template is arranged on an adjustable jacking, and when a radial bracket is adopted as the bracket system, the cover beam lower-layer bottom template is arranged on a support frame; sequentially constructing a lower cover beam and an upper cover beam, and arranging a stretching steel beam to form a large cantilever cover beam;
and step four, stretching the stretching steel bundles and sealing anchors on two sides of the large cantilever bent cap.
2. The construction method of the prestressed large cantilever inverted T-shaped variable cross-section bent cap according to claim 1, wherein in the first step, the lower structure of the bridge comprises a cast-in-place pile, a bearing platform is constructed on the upper portion of the cast-in-place pile, an pier stud is constructed on the bearing platform, backfilled sand gravel is filled in the bearing platform foundation pit, then a concrete foundation is poured on the backfilled sand gravel, and the concrete foundation is horizontally connected with an original asphalt pavement.
3. The construction method of the prestressed large cantilever inverted T-shaped variable cross section bent cap according to claim 1, wherein in the second step, when the disc buckle type scaffold is adopted as a bracket system, the disc buckle type scaffold comprises upright posts, the lower parts of the upright posts are provided with bottom brackets, the upper parts of the upright posts are provided with adjustable top brackets, the upright posts are connected through four rows of cross bars, and a plurality of scissor supports are arranged between the upright posts.
4. The construction method of the prestressed large cantilever inverted T-shaped variable cross section bent cap according to claim 1, wherein in the second step, when a radial bracket is adopted as a bracket system, the inner sides of two pier columns are connected in a reinforcing way through an inner connecting piece of a pier column hoop bracket, the outer sides of two pier columns are connected in a reinforcing way through an outer connecting piece of the pier column hoop bracket, the pier column hoop bracket supports a radial bracket cross beam through a radial telescopic bracket diagonal bracing, the lower part of the radial telescopic bracket diagonal bracing is connected with the pier column hoop bracket through an outer connecting piece of the pier column hoop bracket, a plurality of radial bracket diagonal bracing connecting points are arranged on the radial bracket cross beam, the upper parts of the radial telescopic bracket diagonal bracing are connected with different radial bracket diagonal bracing connecting points according to the length of the bent cap cantilever, and the upper parts of the radial telescopic bracket diagonal bracing are connected with corresponding radial bracket diagonal bracing connecting points through radial bracket diagonal bracing movable connecting pieces; a plurality of support I-beams are arranged on the radial bracket cross beam, and a support frame is arranged on the support I-beams.
5. The construction method of the prestressed large cantilever inverted-T-shaped variable cross-section bent cap according to claim 1, wherein in the third step, construction operation platforms are symmetrically arranged on two sides of the upper portion of the disc-buckling scaffold, protective railings are arranged outside the construction operation platforms, and safety nets are arranged between the protective railings.
6. The construction method of the prestressed large cantilever inverted T-shaped variable cross-section bent cap according to claim 1, wherein in the third step, after binding the steel bars of the lower bent cap, the lower custom-made combined side steel dies of the bent cap are constructed, after the installation of the lower custom-made combined side steel dies of the bent cap is completed, reinforcing locking pull rods are additionally arranged between the lower custom-made combined side steel dies of the bent cap, after the maintenance of the lower bent cap is completed, binding the steel cages of the upper bent cap is carried out, then installing the upper custom-made combined side steel dies of the bent cap is carried out, after the installation of the upper custom-made combined side steel dies of the bent cap is completed, reinforcing locking pull rods are additionally arranged, and then the concrete and the maintenance of the upper bent cap are poured.
7. The construction method of the prestressed large cantilever inverted-T-shaped variable cross-section bent cap according to claim 1, wherein the fourth step is specifically as follows: the two sides of the large cantilever bent cap are symmetrically provided with a group of prefabricated stretching anchor ear bent cap hanging telescopic operation platform and a construction platform anchor ear bent cap telescopic device respectively, the prefabricated stretching anchor ear bent cap hanging telescopic operation platform comprises a stretching construction platform support, the lower part of the construction platform anchor ear bent cap telescopic device is connected with the stretching construction platform support, the stretching construction platform support is additionally provided with a stretching construction platform diagonal bracing and a stretching construction platform bottom reinforcing diagonal bracing, the lower part of the construction platform support is provided with a stretching construction platform base, the construction platform support is provided with a telescopic device control end, and the upper position and the lower position of the prefabricated stretching anchor ear bent cap hanging telescopic operation platform are controlled through the telescopic device control end; the two sides of the large cantilever bent cap are provided with notches, and the stretching of the stretching steel beam is performed through the notches and the anchor is sealed.
8. Prestressed large cantilever inverted T-section bent cap, characterized by being obtained by the method according to any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311724210.0A CN117468328A (en) | 2023-12-14 | 2023-12-14 | Prestressed large cantilever inverted T-shaped variable cross section bent cap and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311724210.0A CN117468328A (en) | 2023-12-14 | 2023-12-14 | Prestressed large cantilever inverted T-shaped variable cross section bent cap and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117468328A true CN117468328A (en) | 2024-01-30 |
Family
ID=89629602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311724210.0A Pending CN117468328A (en) | 2023-12-14 | 2023-12-14 | Prestressed large cantilever inverted T-shaped variable cross section bent cap and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117468328A (en) |
-
2023
- 2023-12-14 CN CN202311724210.0A patent/CN117468328A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5045214B2 (en) | Column head construction method | |
| CN111119059B (en) | Ultrahigh composite support system for high-pier cast-in-place box girder and construction method | |
| CN108374319B (en) | Lower-bearing type tied-arch bridge structural unit, arch bridge structure and construction method thereof | |
| CN104452597B (en) | Pier prestressed cap beam with extra length Construction Supporting System in water | |
| CN112411391A (en) | Single-column capping beam steel pipe column Bailey beam construction supporting system and construction method thereof | |
| CN106012851B (en) | Steel box-girder and performance of concrete column confined method for synchronously constructing | |
| CN110593114A (en) | Box girder construction method based on large-span box girder multi-hoop truss support bailey bracket | |
| CN112609595A (en) | Construction method for closure section of beam-arch combined rigid frame bridge | |
| CN112554059A (en) | Viaduct ground-crossing parallel bridge pier full combined support and construction method thereof | |
| CN109594581B (en) | River-crossing pipeline structure and installation method thereof | |
| CN111926715A (en) | Installation method of steel box girder bridge | |
| CN109577206B (en) | Hollow high pier formwork system and construction method | |
| JP4040900B2 (en) | 3D intersection construction method, 3D intersection and moving platform | |
| CN117468328A (en) | Prestressed large cantilever inverted T-shaped variable cross section bent cap and construction method | |
| CN116254783A (en) | High-position girder falling construction method suitable for erecting high-speed railway precast box girders | |
| JP4685341B2 (en) | Viaduct construction method | |
| CN212742154U (en) | Steel reinforced concrete arch bridge | |
| CN104452598A (en) | Construction method for water pier super-long pre-stressed cap beam construction supporting system | |
| CN210684479U (en) | Concrete cast-in-place support of adjustable slope | |
| JP2000045229A (en) | Constructing method of bridge | |
| CN210086061U (en) | City viaduct single-column pier bent cap construction equipment | |
| CN108330996B (en) | Slurry pond cofferdam and construction method | |
| CN111501531A (en) | Construction method of V-shaped thin-wall pier and 0# block main beam supporting system | |
| CN109629443B (en) | Cast-in-place channel beam three-point pushing system crossing existing road and construction method | |
| CN211973136U (en) | Cast-in-place bridge formwork support frame of large-span |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |