CN113430913A - Wet joint construction method for steel plate combination beam bridge deck slab - Google Patents
Wet joint construction method for steel plate combination beam bridge deck slab Download PDFInfo
- Publication number
- CN113430913A CN113430913A CN202110705403.6A CN202110705403A CN113430913A CN 113430913 A CN113430913 A CN 113430913A CN 202110705403 A CN202110705403 A CN 202110705403A CN 113430913 A CN113430913 A CN 113430913A
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- prefabricated section
- bottom die
- prefabricated
- bridge deck
- wet joint
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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
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a construction method of a wet joint of a bridge deck slab of a steel plate composite beam, which comprises the following steps: 1) installing a first prefabricated section bottom die, and pouring a first prefabricated section, wherein one end of the first prefabricated section bottom die is a fixed bottom die, and the other end of the first prefabricated section bottom die is a movable bottom die; 2) the movable bottom die of the first prefabricated section is dismounted, and the poured first prefabricated section and the bottom die of the first prefabricated section are integrally and horizontally moved to a matching position; 3) installing a second prefabricated section bottom die to be poured, wherein the second prefabricated section bottom die has the same structure as the first prefabricated section bottom die; 4) lapping the bottom supporting plate of the first prefabricated section onto the fixed bottom die of the second prefabricated section, and pouring concrete; 5) horizontally moving the second prefabricated section and the bottom die of the second prefabricated section to a matching position integrally; 6) concrete is poured into the wet joints between adjacent prefabricated segments. The invention can reduce the amount of work such as template installation, demolition and the like, and really achieve labor saving, material saving and labor saving.
Description
Technical Field
The invention relates to the field of steel plate composite beam bridge structures in bridge engineering, in particular to a construction method for wet joints of a steel plate composite beam bridge deck.
Background
The wet joint refers to the bridge deck plate of the steel plate composite beam which is prefabricated in blocks and assembled into the bridge deck on site, the beam bodies are connected into an integral joint by cast-in-place concrete, the integral joint belongs to the driving track plate in terms of stress, reinforcing steel bars arranged in the wet joint are generally dozens of centimeters wide (the width of the wet joint of the bridge is 50-95 centimeters and different), the wet joint is positioned in the transverse connection of the concrete beam, longitudinal reinforcing steel bars penetrate through the middle of a hoop ring to enable the bridge deck to form an integral body, and the concrete with the same mark number as the beam bodies is poured.
The short line method is one of segment prefabrication and assembly construction methods, and is a construction method that a span structure is divided into a plurality of segments and the segments are poured one by adopting the same adjustable template. And when pouring, pouring the next segment by taking the poured segment as a matched segment. Compared with the conventional prestressed concrete bridge, the segmental precast assembled bridge has the remarkable structural characteristic that splicing seams exist among the segments. The number of seams in each span is large, the seams become the weakest link of structural stress, and the mechanical behavior of the seams directly influences the overall performance of the full bridge.
The bridge deck of the early steel plate combined beam bridge is divided into a plurality of prefabricated block sections along the longitudinal bridge direction and the transverse bridge direction, the prefabricated construction mostly adopts longitudinal and transverse block prefabrication, the width of a wet joint is generally 50-80 cm, and the prefabricated bridge deck is installed. And (4) reserving reinforcing steel bars at the wet joint, welding and connecting the wet joint reinforcing steel bars after the bridge deck is installed, and pouring the wet joint through a hanging die. The construction method has less transportation and hoisting limit conditions. However, the amount of work for field operation is relatively large, especially the amount of field installation and construction is large, the construction quantity and the construction period of wet joints occupy a long time, the welding difficulty of reinforcing steel bars is large, the field welding period is long, and the standardized construction is not facilitated.
Disclosure of Invention
The invention aims to provide a construction method for wet joints of steel plate composite beam bridge decks, which can reduce the use amount of templates, reduce the amount of work for installing and dismantling templates and the like, really save labor, materials and labor, and can avoid the problems of dislocation, slurry leakage, concrete color difference and the like of the traditional wet joints.
In order to achieve the above object, the present invention provides a steel plate composite beam bridge deck wet joint construction method, wherein the steel plate composite beam bridge deck comprises a plurality of spliced prefabricated sections, each prefabricated section comprises a bridge deck and a bottom support plate, the bridge deck and the bottom support plate are integrally prefabricated, and the method comprises the following steps:
1) installing a first prefabricated section bottom die, installing a side die, and pouring a first prefabricated section, wherein one end of the first prefabricated section bottom die is a fixed bottom die, the other end of the first prefabricated section bottom die is a movable bottom die, and the movable bottom die is hinged with a bottom mounting plate of the first prefabricated section;
2) unloading the movable bottom die of the first prefabricated section, and horizontally moving the poured first prefabricated section and the bottom die of the first prefabricated section to a matching position integrally by using a bottom die trolley to serve as a matching section constructed by a short-line matching method;
3) installing a second prefabricated section bottom die to be poured, installing a side die, and adjusting to a set position according to a linear instruction, wherein the second prefabricated section bottom die has the same structure as the first prefabricated section bottom die;
4) lapping the bottom supporting plate of the first prefabricated section to the fixed bottom die of the second prefabricated section, and pouring concrete;
5) horizontally moving the poured second prefabricated section and the bottom die of the second prefabricated section to a matching position integrally by using a bottom die trolley to serve as a new matching section constructed by a short-line matching method, hoisting the first prefabricated section to a plate storage area, and sequentially and circularly finishing pouring of the next prefabricated section;
6) concrete is poured into the wet joints between adjacent prefabricated segments.
Preferably, the bottom supporting plate is a bottom supporting plate with the thickness of 5cm and the like.
Preferably, the length of the movable bottom die is 40 cm.
Preferably, holes for penetrating wet joint reinforcing steel bars are reserved on the steel guardrail base on one side of each prefabricated section.
Preferably, every two adjacent prefabricated segments are connected by a wet seam.
The preferable scheme is that the embedded steel bars in the prefabricated sections respectively extend into the wet joint areas connected with the prefabricated sections, and after the prefabricated sections are hoisted, the wet joints are poured.
Preferably, the embedded steel bars are annular.
Preferably, the concrete poured in the wet joint is high-performance concrete.
Preferably, the embedded steel bars are arranged in a staggered lap joint mode.
The invention has the beneficial effects that:
1. the bridge deck slab and the bottom supporting plate are integrally prefabricated, the bottom supporting plate is prefabricated as one part of the bridge deck slab, the standardization level is improved, the working procedures of pouring wet joints on site and installing bottom moulds are reduced, and the construction progress can be accelerated;
2. according to the invention, the bottom support is used for replacing the traditional wet joint concrete bottom die, so that the use amount of the template is reduced to a great extent, and the work amount of installing, dismantling and the like of the template is reduced, thereby really saving labor, materials and labor;
3. according to the invention, the bridge deck is prefabricated based on the stub wire matching method, the facing surfaces of two adjacent prefabricated sections are in a close-fitting state, and the problems of slab staggering, slurry leakage and large concrete color difference of the traditional wet joint are solved by pouring concrete at the later stage.
4. The prefabricated bridge deck is adopted, the processes of formwork erection and formwork removal on a construction site are avoided, the on-site construction period can be greatly shortened, the construction quality is improved, and the high-altitude operation risk is reduced.
5. The bridge deck and the bottom supporting plate are integrally prefabricated, so that after the wet joint connecting structure is formed, the formwork is not required to be dismantled, and the construction efficiency is greatly improved;
6. the plates are prefabricated by adopting a short-line matching method, the designed bottom supporting plate and the panel are prefabricated simultaneously, the matching size of the next plate is adjusted through linear monitoring data, each plate is accurately matched, is matched plate by plate, is numbered plate by plate, is in seat by number, and the prefabricated line shape of the bottom supporting plate can be accurately controlled.
Drawings
FIG. 1 is a schematic view of the present invention illustrating the construction of a first prefabricated section;
FIG. 2 is a schematic view of the mating structure of a first prefabricated segment and a second prefabricated segment according to the present invention;
FIG. 3 is a schematic view of the construction of the wet joint bottom pallet between the installed back plates of the bridge deck according to the present invention.
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 will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by a user of ordinary skill in the art.
The invention provides a construction method for wet joints of a bridge deck of a steel plate composite beam, wherein the bridge deck of the steel plate composite beam comprises a plurality of spliced prefabricated sections, each prefabricated section comprises a bridge deck and a bottom supporting plate, the bridge deck and the bottom supporting plate are integrally prefabricated, and the construction method comprises the following steps:
1) installing a first prefabricated section bottom die 15, installing a side die, and pouring a first prefabricated section 10, wherein one end of the first prefabricated section bottom die 15 is a fixed bottom die, the other end of the first prefabricated section bottom die is a movable bottom die 13, and the movable bottom die 13 is hinged with a bottom base 12 of the first prefabricated section 10;
2) the movable bottom die 13 of the first prefabricated segment 10 is dismounted, and the poured first prefabricated segment 10 and the first prefabricated segment bottom 15 are integrally and horizontally moved to a matching position by using a bottom die trolley 14 to serve as a matching segment constructed by a short-line matching method;
3) installing a second prefabricated section bottom die 20 to be poured, installing a side die, and adjusting to a set position according to a linear instruction, wherein the second prefabricated section bottom die 20 has the same structure as the first prefabricated section bottom die 15;
4) overlapping the bottom supporting plate 12 of the first prefabricated section 10 to the fixed bottom die of the second prefabricated section, and pouring concrete;
5) the bottom die trolley 14 is utilized to horizontally move the poured second prefabricated section and the bottom die 20 of the second prefabricated section to a matching position integrally to serve as a new matching section constructed by a short-line matching method, the first prefabricated section 10 is hung and transferred to a plate storage area, and the pouring of the next prefabricated section is completed in sequence;
6) concrete is poured into the wet joints between adjacent prefabricated segments.
In another embodiment of the present invention, the bottom bracket plate 12 is a bottom bracket plate with a thickness of 5 cm.
In another embodiment of the present invention, the length of the movable die 13 is 40 cm.
In another embodiment of the invention, each prefabricated section is provided with a hole for penetrating wet joint steel bars on the base of the steel guardrail on one side.
In another embodiment of the invention, each two adjacent prefabricated segments are joined by a wet seam.
According to another embodiment of the invention, the embedded steel bars in the prefabricated segments respectively extend into the wet joint areas connected with the embedded steel bars, and after the prefabricated segments are hoisted, the wet joints are poured.
In another embodiment of the present invention, the embedded steel bars are ring-shaped.
In another embodiment of the present invention, the concrete cast in the wet joint is high performance concrete.
In another embodiment of the present invention, the embedded steel bars are overlapped and arranged in a staggered manner.
In another embodiment of the present invention, a method for constructing a wet joint of a steel plate composite beam bridge deck is provided, where the steel plate composite beam bridge deck includes a plurality of spliced prefabricated sections, each prefabricated section 10 includes a bridge deck 11 and a bottom support plate 10, the bridge deck 11 and the bottom support plate 12 are integrally prefabricated, the bottom support plate 12 in this embodiment is a bottom support with an equal thickness of 5cm, and a hole for penetrating a wet joint steel bar is reserved on a steel guardrail base of one side of each prefabricated section. Through wet seam connection between per two adjacent prefabricated sections, embedded steel bar stretches into respectively rather than the wet seam region of being connected in the prefabricated section, embedded steel bar is cyclic annular, and crisscross overlap joint of each other arranges, treats that prefabricated section hoist and mount finishes the back, pours wet seam, and the step includes:
1) installing a first prefabricated section bottom die 15, installing a side die, and pouring a first prefabricated section 10, wherein one end of the first prefabricated section bottom die 15 is a fixed bottom die, the other end of the first prefabricated section bottom die is a movable bottom die 13, the movable bottom die 13 is hinged to a bottom supporting plate 12 of the first prefabricated section 10, and the length of the movable bottom die 13 is 40 cm;
2) the movable bottom die 13 of the first prefabricated segment 10 is dismounted, and the poured first prefabricated segment 10 and the first prefabricated segment bottom die 15 are integrally and horizontally moved to a matching position by using a bottom die trolley 14 to serve as a matching segment constructed by a short-line matching method;
3) installing a second prefabricated section bottom die 20 to be poured, installing a side die, and adjusting to a set position according to a linear instruction, wherein the second prefabricated section bottom die 20 has the same structure as the first prefabricated section bottom die 15;
4) overlapping the bottom supporting plate 12 of the first prefabricated section 10 to the fixed bottom die of the second prefabricated section, and pouring concrete;
5) the bottom die trolley 14 is utilized to horizontally move the poured second prefabricated section and the bottom die of the second prefabricated section to a matching position integrally to serve as a new matching section constructed by a short-line matching method, the first prefabricated section is hung and transferred to a plate storage area, and the pouring of the next prefabricated section is completed in sequence;
6) and pouring concrete into wet joints between adjacent prefabricated sections, wherein the concrete poured in the wet joints is high-performance concrete.
Wherein, deposit the board district and be provided with spraying system, spraying system contains full spraying system and maintenance and sprays, and full spraying system all arranges the spraying system in prefabricated section top for depositing the board district, and maintenance spraying system is the independent spraying system who connects around every prefabricated section, and spraying system is automatic remote control, and every hour automatic spraying is 15-20 minutes, and the frequency is adjusted according to circumstances such as temperature, weather appropriately to the roof beam body keeps moist as the principle. According to design requirements, the section beam can be installed after being prefabricated and stored in a storage yard for two months.
In this embodiment, for the storage of the prefabricated sections that have completed the pouring maintenance, because the prefabricated sections that are stored first are installed first during the installation, in order to be combined in order, the prefabricated sections are stored once every two adjacent prefabricated sections, that is, when one prefabricated section is used as a matching section to finish the construction of the next prefabricated section, the prefabricated section is hung to a finishing pedestal for temporary storage and finishing, after the construction of the next adjacent prefabricated section is finished as a matching section, the next adjacent prefabricated section is hung to a stacking area pedestal for stacking, and then the prefabricated section of the finishing pedestal is hung to the upper surface of the finishing pedestal for stacking. When the prefabricated sections are stacked, uniformly distributed bearing cushion blocks are placed at the bottoms of the sections, and the uniformly distributed bearing cushion blocks can be made of rubber cushion plates or other materials capable of uniformly distributing and bearing the load when the prefabricated sections are stacked.
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 (9)
1. The construction method of the wet joint of the bridge deck of the steel plate composite beam is characterized in that the bridge deck of the steel plate composite beam comprises a plurality of spliced prefabricated sections, each prefabricated section comprises a bridge deck and a bottom supporting plate, the bridge deck and the bottom supporting plate are integrally prefabricated, and the construction method comprises the following steps of:
1) installing a first prefabricated section bottom die, installing a side die, and pouring a first prefabricated section, wherein one end of the first prefabricated section bottom die is a fixed bottom die, the other end of the first prefabricated section bottom die is a movable bottom die, and the movable bottom die is hinged with a bottom mounting plate of the first prefabricated section;
2) unloading the movable bottom die of the first prefabricated section, and horizontally moving the poured first prefabricated section and the bottom die of the first prefabricated section to a matching position integrally by using a bottom die trolley to serve as a matching section constructed by a short-line matching method;
3) installing a second prefabricated section bottom die to be poured, installing a side die, and adjusting to a set position according to a linear instruction, wherein the second prefabricated section bottom die has the same structure as the first prefabricated section bottom die;
4) lapping the bottom supporting plate of the first prefabricated section to the fixed bottom die of the second prefabricated section, and pouring concrete;
5) horizontally moving the poured second prefabricated section and the bottom die of the second prefabricated section to a matching position integrally by using a bottom die trolley to serve as a new matching section constructed by a short-line matching method, hoisting the first prefabricated section to a plate storage area, and sequentially and circularly finishing pouring of the next prefabricated section;
6) concrete is poured into the wet joints between adjacent prefabricated segments.
2. The method for constructing a wet joint of a bridge deck slab with a steel plate composite beam as claimed in claim 1, wherein the bottom bracket is a bottom bracket having an equal thickness of 5 cm.
3. The method for constructing a wet joint of a bridge deck slab with a steel plate composite beam according to claim 1, wherein the length of the movable bottom die is 40 cm.
4. The method of constructing a wet joint of a bridge deck slab with a steel plate composite girder according to claim 1, wherein a hole through which a wet joint reinforcing bar passes is reserved on a steel guard rail base of one side of each of the prefabricated sections.
5. The method of constructing a wet joint of a bridge deck slab comprising a steel plate composite girder according to claim 1, wherein each two adjacent prefabricated segments are connected by a wet joint.
6. The wet joint construction method of the steel plate composite beam bridge deck according to claim 5, wherein embedded steel bars in the prefabricated sections respectively extend into wet joint areas connected with the embedded steel bars, and after the prefabricated sections are hoisted, wet joints are poured.
7. The wet joint construction method of a steel plate composite beam bridge deck according to claim 6, wherein the embedded steel bars are ring-shaped.
8. The wet joint construction method of a steel plate composite beam bridge deck according to claim 6, wherein the concrete poured in the wet joint is high performance concrete.
9. The wet joint construction method of a steel plate composite beam bridge deck according to claim 7, wherein the embedded steel bars are arranged in a staggered overlapping manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110705403.6A CN113430913A (en) | 2021-06-24 | 2021-06-24 | Wet joint construction method for steel plate combination beam bridge deck slab |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110705403.6A CN113430913A (en) | 2021-06-24 | 2021-06-24 | Wet joint construction method for steel plate combination beam bridge deck slab |
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