CN109868715B - Assembled continuous steel box girder bridge - Google Patents
Assembled continuous steel box girder bridge Download PDFInfo
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- CN109868715B CN109868715B CN201811413176.4A CN201811413176A CN109868715B CN 109868715 B CN109868715 B CN 109868715B CN 201811413176 A CN201811413176 A CN 201811413176A CN 109868715 B CN109868715 B CN 109868715B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 239000007787 solid Substances 0.000 claims description 35
- 238000005192 partition Methods 0.000 claims description 14
- 239000003351 stiffener Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012761 high-performance material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The present disclosure provides an assembled continuous steel box girder bridge, comprising a main girder, a transverse connecting girder and a cantilever girder, wherein the main girder, the transverse connecting girder and the cantilever girder are fixedly connected; the main beams are provided with a plurality of groups, each group is formed by connecting a plurality of main beam sections along the bridge direction, each main beam section comprises a main beam top plate, a main beam bottom plate, a main beam web plate, main beam transverse baffle plates and main beam stiffening ribs, the main beam web plates are fixed between the main beam top plate and the main beam bottom plate, the main beam transverse baffle plates are fixed between the main beam top plate, the main beam web plates and the main beam bottom plate, and the main beam stiffening ribs are fixed on the main beam top plate, the main beam bottom plate and the main beam web plates; the transverse connecting beams are arranged between two adjacent groups of main beams, each transverse connecting beam is fixedly connected between two adjacent groups of main beams, and the cantilever beams are fixedly connected with two groups of outer side main beams in the plurality of groups of main beams.
Description
Technical Field
The present disclosure relates to the field of girder bridges, and in particular, to an assembled continuous steel box girder bridge.
Background
In decades of innovation, along with the acceleration of the modernization and urbanization process of China, the bridge construction technology of China is developed rapidly, and the bridge industry has a certain scale. Among midspan bridges in China, concrete beam bridges are the majority, and concrete materials are considered as the preferred structural materials with good durability and low price, so that the concrete beam bridges have been developed for decades in China and are most applied. However, due to the influence of the use condition change and environmental erosion and other factors on the structure, the structure can be damaged to different degrees due to improper design and construction, so that the bridge is damaged, the structural performance is degraded, the use function is gradually reduced or even completely lost, and the characteristics are particularly outstanding in the midspan bridge. Along with the development of national economy and the promotion of industrialization, for a plurality of midspan diameter beam bridges, the prefabrication assembly technology is more applied in the bridge industrialization process, the original design construction process with low efficiency is simplified into the production and assembly process of standard components, and the bridge construction time is greatly shortened on the premise of ensuring the bridge product quality, which is the bridge rapid construction technology. Different from the traditional concrete beam prefabrication and assembly technology, the steel box girder bridge rapid construction technology has better industrialized foundation and industrialization potential, is more environment-friendly and quicker to construct, and can better meet the requirement of light large span. According to the main beam arrangement form, more steel box beams are adopted at present, and the steel box beams are in the forms of single box multi-chamber, multi-box single chamber and the like.
The upper part of the steel box girder bridge mainly comprises a main girder, a transverse connection system and a bridge deck system, and the longitudinal connection system is not required because the transverse rigidity of the steel box girder bridge is very high. The steel box girder has larger single box bearing capacity, can adopt the structural forms of single box, double box and multiple boxes, and has more flexible overall arrangement. Single box steel girder bridges generally take the form of a single box single chamber structure. The middle web of the single box multi-chamber structure has little contribution to the torsional rigidity of the box girder, the effective working width is not clear, and the steel consumption is increased, so that the adoption is less, and only the girder height is limited and the adoption is needed. The bridge width is bigger, or the structure size of a single box is oversized, and the manufacturing, the transportation, the installation and the erection are difficult, or the effective width of the single box is very small, and when the bridge is uneconomical, the double-box structure is adopted reasonably.
The arrangement of the multi-box steel girder bridge is substantially the same as that of the double-box steel girder bridge. Because the steel consumption of the multi-box structure is larger, the multi-box girder bridge is only adopted when the span is smaller and the bridge width is large, and in order to ensure that the stress of each girder is uniform and the stress of the bridge deck is improved, the girders of the multi-box girder bridge are arranged at equal intervals as much as possible.
For a steel girder bridge with a double-box or multi-box structure, in order to make the stress of each girder be more uniform and support the longitudinal girders and the bridge deck, an intermediate cross beam is often arranged between the box girders. The beam end or the middle support is provided with the cross beam, so that the integral torsion resistance of the bridge and the counterforce of the dispersed pivot can be effectively improved.
Disclosure of Invention
In order to solve at least one technical problem in the prior art, the present disclosure provides an assembled continuous steel box girder bridge with a novel structure, which is realized by the following technical scheme.
The assembled continuous steel box girder bridge comprises a main girder, a transverse connecting girder and a cantilever girder, wherein the main girder, the transverse connecting girder and the cantilever girder are fixedly connected;
the main beams are provided with a plurality of groups, each group is formed by connecting a plurality of main beam sections along the bridge direction, each main beam section comprises a main beam top plate, a main beam bottom plate, a main beam web plate, main beam transverse baffle plates and main beam stiffening ribs, the main beam web plates are fixed between the main beam top plate and the main beam bottom plate, the main beam transverse baffle plates are fixed between the main beam top plate, the main beam web plates and the main beam bottom plate, and the main beam stiffening ribs are fixed on the main beam top plate, the main beam bottom plate and the main beam web plates;
the transverse connecting beams are arranged between two adjacent groups of main beams, and each transverse connecting beam is fixedly connected between the two adjacent groups of main beams;
the transverse connecting beam comprises a transverse connecting beam top plate, transverse connecting beam stiffening ribs and solid-web transverse partition plates, and the solid-web transverse partition plates are fixedly connected between the transverse connecting beam top plate and the transverse connecting beam stiffening ribs;
the cantilever beam comprises a plurality of cantilever beam sections configured along the bridge direction, each cantilever beam section comprises a cantilever beam top plate, a cantilever beam web, a cantilever beam diaphragm and a cantilever beam stiffening rib, and the cantilever beam diaphragm is fixedly connected among the cantilever beam top plate, the cantilever beam web and the cantilever beam stiffening rib;
the cantilever beam is fixedly connected with two groups of outer side girders among the plurality of groups of girders.
According to at least one embodiment of the present disclosure, the cantilever beam top plate is fixedly connected to the main beam top plate along the transverse bridge direction, and the cantilever beam diaphragm is fixedly connected to the main beam diaphragm of two sets of outer main beams of the plurality of sets of main beams.
According to at least one embodiment of the present disclosure, the solid web diaphragm comprises a solid web long diaphragm and a solid web short diaphragm, the solid web long diaphragm is disposed on the abutment roof of the bridge, the solid web long diaphragm is disposed at the midspan position, and the solid web short diaphragm is disposed between the bridge abutment roof and the midspan.
According to at least one embodiment of the present disclosure, the girder stiffening ribs include three types of stiffening ribs, namely, girder flat ribs, girder unequal-thickness U-shaped ribs and girder T-shaped ribs, the upper ends of the girder flat ribs being fixedly connected with the girder top plate, the girder bottom plate, the girder web plate and the girder transverse partition plate; the upper ends of the U-shaped ribs with unequal thicknesses of the main beams are fixedly connected with the top plate, and the T-shaped ribs of the main beams are connected with the transverse baffle plates of the main beams.
According to at least one embodiment of the present disclosure, the solid web short diaphragm is bolted to the main beam diaphragm and the solid web long diaphragm is bolted to the main beam diaphragm.
According to at least one embodiment of the present disclosure, the solid web diaphragm comprises a solid web short diaphragm T-shaped rib and a solid web long diaphragm T-shaped rib, the solid web short diaphragm T-shaped rib being welded to the main beam web; the T-shaped rib of the solid-web long diaphragm plate is connected with the main beam bottom plate through bolts.
According to at least one embodiment of the present disclosure, the transverse contact beam stiffener comprises a transverse contact beam flat rib, a transverse contact beam unequal thickness U-shaped rib and a transverse contact beam T-shaped rib, the transverse contact beam flat rib is fixedly connected with the transverse contact beam top plate; the transverse connecting beam T-shaped rib is fixedly connected with the solid web diaphragm plate; the transverse connecting beam is fixed on the top plate of the transverse connecting beam through U-shaped ribs with unequal thickness.
In accordance with at least one embodiment of the present disclosure, the transverse contact beam flat ribs and the transverse contact beam unequal thickness U-shaped ribs are spaced apart along the transverse bridge.
According to at least one embodiment of the present disclosure, the cantilever beam diaphragm is configured with cantilever beam diaphragm stiffeners fixedly connected to the main beam diaphragm stiffeners.
In accordance with at least one embodiment of the present disclosure, the cantilever beam stiffener includes two types of stiffener, namely a cantilever Liang Bian rib and a cantilever beam T-shaped rib, the upper end of the cantilever Liang Bian rib being fixedly connected to the cantilever beam top plate; the cantilever beam T-shaped rib is fixedly connected with the cantilever beam diaphragm plate.
The assembled continuous steel box girder bridge adopts a 'main girder-transverse connecting girder-cantilever girder splicing system', namely, transverse connecting girders are arranged in the middle of the main girders so as to enlarge the connection between the main girders. The advantages of this solution are: the structural form is between the double main beams and the multiple main beams (dense beam system), and the additionally arranged transverse connecting beams partially meet the stress requirement of the main beams, and meanwhile, the self form greatly saves the steel consumption of the main beams and meanwhile, the steel consumption of the main beams. Meanwhile, compared with the traditional multi-box steel box girder welded on site, the assembled steel girder segments are manufactured by welding all steel plates in a factory in advance by workers, so that the weld-free welding of the site roof removal position is realized. Each steel beam section is assembled one by one to form a whole on site through high-strength bolts, so that the structural integrity and the permanence are ensured, the construction quality is guaranteed, and the difficulty of site operation is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a schematic girder structure diagram of an assembled continuous steel box girder bridge according to an embodiment of the present disclosure (left view is a schematic forward bridge structure diagram of a girder web, and right view is a schematic transverse bridge structure diagram of a girder);
FIG. 2 is a schematic view of solid long diaphragm plates and solid short diaphragm plates of transverse contact beams of an assembled continuous steel box girder bridge according to an embodiment of the present disclosure;
fig. 3 is a schematic cross-sectional view of a cantilever beam of an assembled continuous steel box girder bridge in accordance with an embodiment of the present disclosure.
Detailed Description
The present disclosure is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant matter and not limiting of the disclosure. It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings.
It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-3, the assembled continuous steel box girder bridge comprises a main girder, a transverse connecting girder and a cantilever girder, wherein the main girder, the transverse connecting girder and the cantilever girder are fixedly connected; the main beams are provided with a plurality of groups, each group is formed by connecting a plurality of main beam sections along the bridge direction, each main beam section comprises a main beam top plate, a main beam bottom plate, a main beam web plate, main beam transverse baffle plates and main beam stiffening ribs, the main beam web plates are fixed between the main beam top plate and the main beam bottom plate, the main beam transverse baffle plates are fixed between the main beam top plate, the main beam web plates and the main beam bottom plate, and the main beam stiffening ribs are fixed on the main beam top plate, the main beam bottom plate and the main beam web plates; the transverse connecting beams are arranged between two adjacent groups of main beams, and each transverse connecting beam is fixedly connected between the two adjacent groups of main beams; the transverse connecting beam comprises a transverse connecting beam top plate, transverse connecting beam stiffening ribs and solid-web transverse partition plates, and the solid-web transverse partition plates are fixedly connected between the transverse connecting beam top plate and the transverse connecting beam stiffening ribs; the cantilever beam comprises a plurality of cantilever beam sections configured along the bridge direction, each cantilever beam section comprises a cantilever beam top plate, a cantilever beam web, a cantilever beam diaphragm and a cantilever beam stiffening rib, and the cantilever beam diaphragm is fixedly connected among the cantilever beam top plate, the cantilever beam web and the cantilever beam stiffening rib; the cantilever beam is fixedly connected with two groups of outer side girders among the plurality of groups of girders.
In at least one embodiment of the present disclosure, the cantilever beam top plate is fixedly connected to the main beam top plate along the transverse bridge direction, and the cantilever beam diaphragm is fixedly connected to the main beam diaphragm of two sets of outer main beams of the plurality of sets of main beams.
In at least one embodiment of the present disclosure, the solid web diaphragm comprises a solid web long diaphragm and a solid web short diaphragm, the solid web long diaphragm is disposed on the abutment roof of the bridge, the solid web long diaphragm is disposed at the midspan position, and the solid web short diaphragm is disposed between the bridge abutment roof and the midspan.
In at least one embodiment of the present disclosure, the girder stiffening ribs include three types of stiffening ribs, namely, girder flat ribs, girder unequal-thickness U-shaped ribs and girder T-shaped ribs, the upper ends of the girder flat ribs being fixedly connected with the girder top plate, the girder bottom plate, the girder web plate and the girder transverse partition plate; the upper ends of the U-shaped ribs with unequal thicknesses of the main beams are fixedly connected with the top plate, and the T-shaped ribs of the main beams are connected with the transverse baffle plates of the main beams.
The main beam web plate flat ribs are fixed on the main beam web plate, and continuously pass through the positions of the main beam transverse partition plates (transverse rib plates); the main beam bottom plate flat rib is fixed on the main beam bottom plate and continuously passes through the position of the main beam transverse partition plate. The U-shaped ribs with unequal thicknesses of the main beams are fixed on the main beam top plate, and the U-shaped ribs of the main beams continuously pass through the positions of the transverse partition plates (transverse rib plates) of the main beams; the girder T-shaped rib is connected with the girder diaphragm plate.
In at least one embodiment of the present disclosure, the solid web short diaphragm is bolted to the main beam diaphragm and the solid web long diaphragm is bolted to the main beam diaphragm.
The transverse connecting beam solid-web type short diaphragm plate is connected with the girder top plate, the girder diaphragm plate and the girder web plate of the girder section; the transverse connecting beam solid-web type long diaphragm plate is connected with the girder top plate, the girder diaphragm plate and the girder bottom plate of the girder segment.
In at least one embodiment of the present disclosure, the solid web diaphragm includes solid web short diaphragm T-ribs and solid web long diaphragm T-ribs, the solid web short diaphragm T-ribs welded to the main beam web; the T-shaped rib of the solid-web long diaphragm plate is connected with the main beam bottom plate through bolts.
In at least one embodiment of the present disclosure, the transverse contact beam stiffener comprises a transverse contact beam flat rib, a transverse contact beam unequal thickness U-shaped rib, and a transverse contact beam T-shaped rib, the transverse contact beam flat rib being fixedly connected to the transverse contact beam top plate; the transverse connecting beam T-shaped rib is fixedly connected with the solid web diaphragm plate; the transverse connecting beam is fixed on the top plate of the transverse connecting beam through U-shaped ribs with unequal thickness.
In at least one embodiment of the present disclosure, the transverse contact beam flat ribs and the transverse contact beam unequal thickness U-shaped ribs are spaced apart along the transverse bridge.
In at least one embodiment of the present disclosure, the cantilever beam diaphragm is configured with cantilever beam diaphragm stiffeners fixedly connected to the main beam diaphragm stiffener.
In at least one embodiment of the present disclosure, the cantilever beam stiffener includes two types of stiffener, namely a cantilever Liang Bian rib and a cantilever beam T-shaped rib, the upper end of the cantilever Liang Bian rib being fixedly connected to the cantilever beam top plate; the cantilever beam T-shaped rib is fixedly connected with the cantilever beam diaphragm plate.
In more detail, in one embodiment, the girders have 3 sets, with 3 sets of girders disposed in parallel along the forward direction on top of the bridge abutment, each set of girders being made up of a plurality of girder segments connected together. As shown in fig. 1, each girder segment includes a girder top plate, a girder bottom plate, a girder web, a girder diaphragm plate (a transverse rib plate), and a girder stiffening rib, the girder web being fixed between the girder top plate and the girder bottom plate; the girder diaphragm plate (transverse rib plate) is fixed between the girder top plate, the girder bottom plate and the girder web plate; the girder bottom plate and the girder web are provided with high-strength bolt holes, the girder bottom plate and the girder web are connected through high-strength bolts along the bridge direction, the girder segments are connected together by adopting the high-strength bolts during construction, the girder transverse partition plates are provided with the high-strength bolt holes, and the girders are connected with the transverse connecting beams through the high-strength bolt holes; welding a main girder top plate along the bridge direction; and a plurality of girder stiffening ribs are arranged on each girder segment.
As shown in fig. 1, the girder stiffening ribs include three types of stiffening ribs, namely, a girder flat rib, a girder unequal-thickness U-shaped rib and a girder T-shaped rib, the girder flat rib includes a girder web flat rib and a girder bottom plate flat rib, the girder web flat rib is fixed on a girder web, the girder web flat rib continuously passes at the position of a girder diaphragm (a transverse rib plate), it is connected between forward bridge and girder segments by bolts, the girder bottom plate flat rib is fixed on a girder bottom plate, the girder bottom plate flat rib continuously passes at the position of the girder diaphragm (a transverse rib plate), the girder unequal-thickness U-shaped rib is fixed on a girder top plate, the girder unequal-thickness U-shaped rib continuously passes at the position of the girder diaphragm (a transverse rib plate), and it is connected between forward bridge and girder segments by bolts; the main beam T-shaped rib is welded with the main beam diaphragm plate; the girder top plate and the girder unequal-thickness U-shaped ribs form an orthotropic bridge deck.
In the embodiment, according to the stress characteristics of the whole structure of the girder bridge, transverse connecting girders are arranged among three parallel groups of girders, and each transverse connecting girder is fixedly connected with the three groups of girders; the transverse connecting beam diaphragm plate adopts a solid web diaphragm plate.
As shown in fig. 2, the transverse connecting beam comprises a top plate, stiffening ribs, a solid-web short diaphragm plate and a solid-web long diaphragm plate, a plurality of transverse connecting beam diaphragm plates are provided, the left side view is the solid-web long diaphragm plate of the transverse connecting beam, and the solid-web long diaphragm plate of the transverse connecting beam is arranged on the top of the bridge abutment; and arranging a solid-web long diaphragm plate of the transverse connecting beam at the midspan position of the bridge span. The right graph is a solid-web short diaphragm plate of a transverse connecting beam, and the solid-web short diaphragm plate of the transverse connecting beam is arranged between the bridge pier top and the bridge span. The solid web type diaphragm plates of the transverse connecting beams are provided with bolt holes and are connected with the diaphragm plates at the outer sides of the main beams by high-strength bolts; the transverse connecting beam top plate is welded with the main beam top plate; the transverse partition T-shaped rib is connected with the girder web plate and the girder bottom plate, so that the fixed connection of the transverse connecting beam and the girder is completed. The transverse connecting beam stiffening ribs comprise three types of stiffening ribs, namely transverse connecting beam flat ribs, transverse connecting beam unequal-thickness U-shaped ribs and transverse connecting beam T-shaped ribs, wherein the transverse connecting beam flat ribs comprise transverse connecting beam top plate flat ribs and transverse connecting beam long diaphragm flat ribs, the transverse connecting beam top plate flat ribs are fixed on a transverse connecting beam top plate, the transverse connecting beam top plate flat ribs continuously pass through at the positions of the diaphragms, the transverse connecting beam top plate flat ribs are connected between the forward-bridge transverse connecting beam sections through bolts, the transverse connecting beam long diaphragm flat ribs are welded on the long diaphragms, the transverse connecting beam unequal-thickness U-shaped ribs are fixed on the transverse connecting beam top plate, the transverse connecting beam top plate flat ribs continuously pass through at the positions of the diaphragms, the transverse connecting beam unequal-thickness U-shaped ribs are connected between the forward-bridge transverse connecting beam sections through bolts, and the transverse connecting beam unequal-thickness U-shaped ribs continuously pass through the positions of the main beam diaphragms through the bolts between the forward-bridge-to main beam sections. The transverse connecting beam T-shaped rib is fixed on the transverse connecting beam diaphragm plate, the short diaphragm plate T-shaped rib is welded with the girder web plate, and the long diaphragm plate T-shaped rib is connected with the girder bottom plate through high-strength bolts.
The cantilever beam comprises a plurality of along the bridge to the festival section, a plurality of cantilever beam sections are along the bridge to the configuration, every cantilever beam section includes roof, diaphragm, web and cantilever Liang Bianle, web fixed connection is between roof and bottom plate, flat rib welding is on the roof, the cantilever roof welds to with the girder roof at the cross bridge, cantilever diaphragm passes through high strength bolted connection with the diaphragm in the girder outside, cantilever diaphragm T shape rib is opened there is the bolt hole, pass through high strength bolt and girder diaphragm T shape rib connection, thereby the cantilever beam links into an integer with the girder, and cantilever roof and the roof of girder are on same horizontal plane.
As shown in FIG. 3, the cantilever beam stiffening ribs include two types of stiffening ribs, namely cantilever Liang Bian ribs and cantilever beam T-shaped ribs, the cantilever Liang Bian ribs are cantilever beam top plate flat ribs, the cantilever beam top plate flat ribs are welded on the cantilever beam top plate, the cantilever beam top plate flat ribs continuously pass through the diaphragm plate positions and are connected by bolts between the bridge-following transverse connection beam sections, the cantilever beam T-shaped ribs are fixed on the cantilever beam diaphragm plates, the short diaphragm plate T-shaped ribs are welded with the girder web plates, and the long diaphragm plate T-shaped ribs are connected with the girder bottom plate by high-strength bolts.
And the continuous steel box girder full bridge splicing is completed through welding and high-strength bolt connection among the main girder, the transverse connecting girder and the cantilever girder.
The technical scheme is particularly suitable for building the middle span beam bridge with moderate width, fully exerts the advantages of prefabricated assembly components and high-performance materials, can simultaneously meet the requirements of economy and structural stress of building engineering, and has strong practicability and operability.
The continuous steel box girder in the specific embodiment of the disclosure adopts the designed and prefabricated welded girder segments in factories, and is transported to a construction site for direct assembly when in use, so that the whole construction process is time-saving and labor-saving; aiming at the bridge deck with moderate width, a multi-girder "+" transverse connecting girder "+" cantilever system is adopted, so that the stress requirement of girders can be met, and construction materials can be saved; the pier top and each span are provided with the transverse connecting beam solid-web long diaphragm plates, and the rest positions are provided with the transverse connecting beam solid-web short diaphragm plates, so that the design form is beneficial to the stability of the whole structure; the light non-prestressed structure and the use of high-performance materials simplify the structure, ensure the high quality of engineering, and meet the requirements of engineering economy and structural stress simultaneously through standardized design, industrial manufacture, modularized transportation and assembly erection.
It will be appreciated by those skilled in the art that the above-described embodiments are merely for clarity of illustration of the disclosure, and are not intended to limit the scope of the disclosure. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present disclosure.
Claims (7)
1. The assembled continuous steel box girder bridge is characterized by comprising a main girder, a transverse connecting girder and a cantilever girder, wherein the main girder, the transverse connecting girder and the cantilever girder are fixedly connected;
the main beams are provided with a plurality of groups, each group is formed by connecting a plurality of main beam sections along the forward bridge direction, each main beam section comprises a main beam top plate, a main beam bottom plate, a main beam web plate, main beam transverse baffle plates and main beam stiffening ribs, the main beam web plates are fixed between the main beam top plate and the main beam bottom plate, the main beam transverse baffle plates are fixed between the main beam top plate, the main beam web plates and the main beam bottom plate, and the main beam stiffening ribs are fixed on the main beam top plate, the main beam bottom plate and the main beam web plates;
the transverse connecting beams are arranged between two adjacent groups of main beams, and each transverse connecting beam is fixedly connected between the two adjacent groups of main beams;
the transverse connecting beam comprises a transverse connecting beam top plate, transverse connecting beam stiffening ribs and solid-web transverse partition plates, and the solid-web transverse partition plates are fixedly connected between the transverse connecting beam top plate and the transverse connecting beam stiffening ribs;
the cantilever beam comprises a plurality of cantilever beam sections which are configured along the bridge direction, each cantilever beam section comprises a cantilever beam top plate, a cantilever beam web, a cantilever beam diaphragm and a cantilever beam stiffening rib, and the cantilever beam diaphragm is fixedly connected among the cantilever beam top plate, the cantilever beam web and the cantilever beam stiffening rib;
the cantilever beams are fixedly connected with two groups of outer side main beams in the plurality of groups of main beams;
the solid-web diaphragm comprises a solid-web long diaphragm and a solid-web short diaphragm, the solid-web long diaphragm is arranged on the pier top of the bridge, the solid-web long diaphragm is arranged at the midspan position of the bridge span, and the solid-web short diaphragm is arranged between the pier top of the bridge and the midspan of the bridge span;
the main beam stiffening ribs comprise three types of stiffening ribs, namely main beam flat ribs, main beam unequal-thickness U-shaped ribs and main beam T-shaped ribs, and the upper ends of the main beam flat ribs are fixedly connected with the main beam top plate, the main beam bottom plate, the main beam web plates and the main beam transverse partition plates; the upper ends of the U-shaped ribs with unequal thicknesses of the main beams are fixedly connected with the top plate, and the T-shaped ribs of the main beams are connected with the transverse baffle plates of the main beams;
the solid-web short diaphragm plate is connected with the main beam diaphragm plate through bolts, and the solid-web long diaphragm plate is connected with the main beam diaphragm plate through bolts.
2. The assembled continuous steel box girder bridge of claim 1, wherein the cantilever roof is fixedly connected to the girder roof along a transverse bridge direction, and the cantilever diaphragm is fixedly connected to the girder diaphragms of two sets of outer girders of the plurality of sets of girders.
3. The assembled continuous steel box girder bridge of claim 1, wherein the solid web diaphragm comprises solid web short diaphragm T-ribs and solid web long diaphragm T-ribs, the solid web short diaphragm T-ribs welded to the girder web; the T-shaped rib of the solid-web long diaphragm plate is connected with the main beam bottom plate through bolts.
4. The assembled continuous steel box girder bridge of claim 3, wherein the transverse tie girder stiffening ribs comprise transverse tie girder flat ribs, transverse tie girder unequal thickness U-shaped ribs and transverse tie girder T-shaped ribs, the transverse tie girder flat ribs being fixedly connected with the transverse tie girder top plate; the transverse connecting beam T-shaped rib is fixedly connected with the solid diaphragm plate; the transverse connecting beam unequal-thickness U-shaped ribs are fixed on the transverse connecting beam top plate.
5. The assembled continuous steel box girder bridge of claim 4, wherein the transverse tie beam flat ribs and the transverse tie beam unequal thickness U-shaped ribs are spaced apart along the transverse bridge.
6. The assembled continuous steel box girder bridge according to claim 1, wherein,
the cantilever beam diaphragm plate is provided with cantilever beam diaphragm plate stiffening ribs which are fixedly connected with the girder diaphragm plate stiffening ribs.
7. The assembled continuous steel box girder bridge of claim 1, wherein the cantilever beam stiffener comprises two types of stiffeners, namely a cantilever Liang Bian rib and a cantilever T-shaped rib, the upper end of the cantilever Liang Bian rib is fixedly connected with the cantilever beam top plate; and the cantilever beam T-shaped rib is fixedly connected with the cantilever beam diaphragm plate.
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Citations (7)
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| CN209741642U (en) * | 2018-11-23 | 2019-12-06 | 中交公路规划设计院有限公司 | Assembled continuous steel box girder bridge |
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| KR20100052728A (en) * | 2008-11-11 | 2010-05-20 | 한국건설기술연구원 | Box girder having hybrid cantilever and bridge using such box girder |
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| CN108625269A (en) * | 2018-05-04 | 2018-10-09 | 西安市政设计研究院有限公司 | A kind of the part opening girder steel and its construction technology of function division design |
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| CN109868715A (en) | 2019-06-11 |
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