CN106677049B - Assembled steel-concrete combined structure bridge and construction method - Google Patents
Assembled steel-concrete combined structure bridge and construction method Download PDFInfo
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- CN106677049B CN106677049B CN201710042560.7A CN201710042560A CN106677049B CN 106677049 B CN106677049 B CN 106677049B CN 201710042560 A CN201710042560 A CN 201710042560A CN 106677049 B CN106677049 B CN 106677049B
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- 239000004567 concrete Substances 0.000 title claims abstract description 128
- 238000010276 construction Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 123
- 239000010959 steel Substances 0.000 claims abstract description 123
- 238000009415 formwork Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 70
- 230000002787 reinforcement Effects 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 3
- 239000004574 high-performance concrete Substances 0.000 claims description 3
- 239000003351 stiffener Substances 0.000 claims description 3
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000009417 prefabrication Methods 0.000 abstract description 2
- 238000009408 flooring Methods 0.000 abstract 4
- 208000037656 Respiratory Sounds Diseases 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000011178 precast concrete Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- E01D1/00—Bridges in general
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
Description
技术领域technical field
本发明涉及一种装配式钢-混凝土组合结构桥梁及其施工方法。The invention relates to an assembled steel-concrete composite structure bridge and a construction method thereof.
背景技术Background technique
钢和混凝土是建造桥梁的主要结构材料，这两种材料在物理和力学性能上具有各自的优势和劣势，通过某种方式将钢材与混凝土组合在一起共同工作，则能够综合发挥传统混凝土结构和钢结构的优势，同时限制其不利作用的出现，从而做到物尽其用，扬长避短。钢-混凝土组合梁是近年来使用较为广泛,技术相对成熟的一种桥梁结构形式。而混凝土板的施工对组合梁桥的承载能力和耐久性具有重要影响。目前，混凝土板的施工主要包括以下两种：Steel and concrete are the main structural materials for building bridges. These two materials have their own advantages and disadvantages in terms of physical and mechanical properties. Combining steel and concrete in a certain way can make full use of the traditional concrete structure and The advantages of the steel structure, while limiting the occurrence of its adverse effects, so as to make the best use of everything and maximize the strengths and avoid weaknesses. Steel-concrete composite beam is a kind of bridge structure that has been widely used in recent years and its technology is relatively mature. The construction of concrete slabs has an important impact on the bearing capacity and durability of composite girder bridges. At present, the construction of concrete slabs mainly includes the following two types:
（1）现场浇筑混凝土法。该方法利用钢梁作为支架，立模后现场浇筑混凝土。其优点是：剪力键周围接合部的混凝土填充振捣的密实度易于控制，混凝土板的整体性好并可任意造型。其缺点是：混凝土干燥收缩受钢梁和剪力键约束而产生拉应力，易产生早期的施工裂纹；现场浇筑混凝土因环境、气候等因素的影响，其质量稳定性比工厂预制混凝土板差；与预制板法相比，施工工期长。(1) On-site pouring concrete method. In this method, steel beams are used as supports, and concrete is poured on site after the formwork is erected. The utility model has the advantages that the compactness of the concrete filling and vibrating at the joint around the shear key is easy to control, and the integrity of the concrete slab is good and can be shaped arbitrarily. Its disadvantages are: the drying shrinkage of concrete is constrained by steel beams and shear keys to produce tensile stress, which is easy to produce early construction cracks; due to the influence of environment, climate and other factors, the quality stability of cast-in-place concrete is worse than that of factory precast concrete slabs; Compared with the prefabricated panel method, the construction period is long.
（2）预制混凝土板法。该方法是在工厂预制混凝土板，吊装就位后现场浇筑接合部位的混凝土，使之成为组合梁。其优点是：混凝土板工厂化预制，有利于确保施工质量；混凝土干燥收缩已基本完成，可以有效控制早期施工裂纹。其缺点是：预制混凝土板与钢梁之间接合部的缝隙填充比较薄弱，影响结构的耐久性；当桥梁较宽时，桥面板横桥向也要分成几块，一方面混凝土现浇量增多，另一方面增加在悬臂处预制板安装难度；预制混凝土板与钢梁通过群钉锚固组合，组合受力效果不如剪力钉均匀布置。(2) Precast concrete slab method. The method is to prefabricate concrete slabs in a factory, and pour concrete on site after being hoisted in place to make it a composite beam. Its advantages are: factory prefabrication of concrete slabs is beneficial to ensure construction quality; concrete drying shrinkage has been basically completed, and early construction cracks can be effectively controlled. The disadvantages are: the gap filling between the precast concrete slab and the steel beam is relatively weak, which affects the durability of the structure; when the bridge is wide, the bridge deck should be divided into several pieces in the transverse direction, on the one hand, the amount of concrete cast in place increases On the other hand, it increases the difficulty of installing precast slabs at the cantilever; precast concrete slabs and steel beams are anchored and combined by group nails, and the combined force effect is not as good as that of shear nails.
发明内容Contents of the invention
有鉴于此，本发明的目的是提供一种装配式钢-混凝土组合结构桥梁及其施工方法，降低施工难度，保证施工质量稳定性，提高结构受力性能。In view of this, the purpose of the present invention is to provide a prefabricated steel-concrete composite structure bridge and its construction method, which can reduce the difficulty of construction, ensure the stability of construction quality, and improve the mechanical performance of the structure.
本发明采用以下方案实现：一种装配式钢-混凝土组合结构桥梁，所述桥梁宽度方向至少由两片预制组合梁拼接而成，所述组合梁包括混凝土预制桥面板和用以支撑混凝土预制桥面板的钢梁，，钢梁上方设置有位于混凝土预制桥面板下方的上翼缘钢板，上翼缘钢板上焊接有将混凝土预制桥面板和上翼缘钢板连接成整体的剪力连接件，在组合梁两侧的上翼缘钢板边缘具有纵肋板，相邻两片组合梁通过邻近的两纵肋板连接在一起。The present invention is realized by the following scheme: an assembled steel-concrete composite structure bridge, the bridge width direction is spliced by at least two prefabricated composite beams, and the composite beam includes a concrete prefabricated bridge deck and a concrete prefabricated bridge for supporting The steel girder of the panel, the upper flange steel plate under the concrete prefabricated bridge deck is arranged above the steel girder, and the upper flange steel plate is welded with a shear connector that connects the concrete prefabricated bridge deck and the upper flange steel plate as a whole. The edges of the upper flange steel plates on both sides of the composite beam have longitudinal ribs, and two adjacent composite beams are connected together through two adjacent longitudinal ribs.
进一步的，相邻两片组合梁的混凝土预制桥面板之间留有用以浇筑有接缝混凝土的现浇接缝，现浇接缝的宽度为300mm~800mm，湿接缝处的上翼缘钢板上布置有将接缝混凝土与位于其下部上翼缘钢板连接在一起的剪力连接件。Further, there is a cast-in-place joint between the concrete prefabricated bridge decks of two adjacent composite beams for pouring joint concrete. The width of the cast-in-place joint is 300mm~800mm, and the upper flange steel plate at the wet joint A shear connector connecting the joint concrete and the steel plate on the lower upper flange is arranged on the upper part.
进一步的，混凝土预制桥面板和接缝混凝土由普通混凝土或超高性能混凝土或钢纤维混凝土或高性能混凝土浇筑而成。Further, the concrete prefabricated bridge deck and joint concrete are poured from ordinary concrete or ultra-high performance concrete or steel fiber concrete or high performance concrete.
进一步的，连接在一起的两纵肋板之间留有5~20mm的间隙，纵肋板为平板形或L形，平板形纵肋板或L形纵肋板的腹板上开设有螺栓孔，相邻两片组合梁之间的纵肋板通过螺栓连接在一起，两纵肋板之间的间隙中填充有高强水泥浆或橡胶垫。Further, there is a gap of 5~20mm between the two longitudinal ribs connected together, the longitudinal ribs are flat or L-shaped, and the webs of the flat longitudinal ribs or L-shaped longitudinal ribs are provided with bolt holes , the longitudinal ribs between two adjacent composite beams are connected together by bolts, and the gap between the two longitudinal ribs is filled with high-strength cement slurry or rubber pads.
进一步的，连接在一起的两纵肋板之间留有100~300mm的间隙，纵肋板为L形或倒T形，相邻两片组合梁之间通过连接钢板和螺栓连接在一起；现浇接缝中设置有位于两纵肋板之间的钢筋笼，钢筋笼向上伸入现浇接缝中，两纵肋板之间的间隙中也浇筑有接缝混凝土，纵肋板上焊接有将接缝混凝土和上翼缘钢板连接在一起的剪力连接件。Further, there is a gap of 100~300mm between the two connected longitudinal ribs, the longitudinal ribs are L-shaped or inverted T-shaped, and the adjacent two composite beams are connected together by connecting steel plates and bolts; now A reinforcement cage between the two longitudinal ribs is installed in the pouring joint, and the reinforcement cage extends upward into the cast-in-place joint, and joint concrete is also poured in the gap between the two longitudinal ribs, and the longitudinal ribs are welded with A shear connection connecting the joint concrete and the upper flange steel plate together.
进一步的，组合梁中混凝土预制桥面板1内分布双层沿纵向设置的桥面板内钢筋以及沿横向设置有环形箍筋，环形箍筋两端穿出混凝土预制桥面板两侧面；现浇接缝内设置有将两环形箍筋端部连接在一起的环形钢筋。Further, in the composite beam, the concrete prefabricated bridge deck 1 is distributed with double-layer steel bars arranged longitudinally in the bridge deck and annular stirrups arranged transversely, and the two ends of the annular stirrups pass through the two sides of the concrete prefabricated bridge deck; An annular steel bar connecting the ends of the two annular stirrups is arranged inside.
进一步的，所述钢梁截面为工字形、箱形或槽形，所述钢梁和上翼缘钢板上均设置有加劲肋。Further, the section of the steel beam is I-shaped, box-shaped or channel-shaped, and stiffeners are provided on the steel beam and the upper flange steel plate.
进一步的，组合梁的上翼缘钢板由多块上翼缘钢板间隔排列而成，纵肋板设置在位于最外侧的上翼缘钢板上，混凝土预制桥面板底面位于相邻两上翼缘钢板之间的间隔处设置有桥面板肋板。Furthermore, the upper flange steel plates of the composite beam are formed by a plurality of upper flange steel plates arranged at intervals, the longitudinal ribs are arranged on the outermost upper flange steel plates, and the bottom surface of the prefabricated concrete bridge deck is located between two adjacent upper flange steel plates. Bridge deck ribs are arranged at intervals between them.
一种如上所述装配式钢-混凝土组合结构桥梁的施工方法，包括以下步骤：A construction method for the assembled steel-concrete composite structure bridge as described above, comprising the following steps:
（1）预制钢—混凝土组合梁：在工厂制作上翼缘钢板具有的钢梁，上翼缘钢板两侧边缘焊接或弯折出纵肋板，在纵肋板上开螺栓孔，上翼缘钢板上焊接剪力连接件；然后在上翼缘钢板上安装用以浇筑混凝土预制桥面板的侧模板，绑扎桥面板内纵向钢筋和环形箍筋，浇筑混凝土预制桥面板，并进行混凝土养护后拆除模板；(1) Prefabricated steel-concrete composite beam: the steel beam with the upper flange steel plate is manufactured in the factory, the edges on both sides of the upper flange steel plate are welded or bent to form longitudinal ribs, bolt holes are opened on the longitudinal ribs, and the upper flange Weld the shear connectors on the steel plate; then install the side formwork for pouring the concrete prefabricated bridge deck on the upper flange steel plate, bind the longitudinal steel bars and ring stirrups in the bridge deck, pour the concrete precast bridge deck, and remove it after concrete curing template;
（2）钢—混凝土组合梁安装：将组合梁运至施工现场，并将通过吊装或推顶将组合梁进行并排架设，相邻两片组合梁的混凝土预制桥面板之间留出现浇接缝；最后用螺栓连接相邻两片组合梁的纵肋板；(2) Installation of steel-concrete composite beams: transport the composite beams to the construction site, and erect the composite beams side by side by hoisting or pushing the top, and leave a gap between the concrete prefabricated bridge decks of two adjacent composite beams joint; finally, bolts are used to connect the longitudinal ribs of two adjacent composite beams;
（3）现浇接缝混凝土施工：在现浇接缝内绑扎环形钢筋，环形钢筋与相邻两片组合梁的环形箍筋端部焊接或绑扎在一起，并在现浇接缝中绑扎与环形钢筋及环形箍筋连接在一起的纵向钢筋，向现浇接缝中浇筑接缝混凝土使得各片组合梁连接成整体，进行接缝混凝土养护；(3) Concrete construction of cast-in-place joints: tie ring-shaped steel bars in the cast-in-place joints. The longitudinal steel bars connected together by circular steel bars and circular stirrups are poured with joint concrete into the cast-in-place joints so that the composite beams are connected as a whole, and the joint concrete is cured;
（4）护栏、防撞墙及泄水孔道施工；(4) Construction of guardrails, anti-collision walls and drainage channels;
（5）桥面铺装施工。(5) Bridge deck pavement construction.
进一步的，步骤（1）中还需要在纵肋板侧面焊接剪力连接件；步骤（3）中在浇筑接缝混凝土之前需要在两纵肋板之间的间隙中放入钢筋笼。Furthermore, in step (1), it is also necessary to weld shear connectors on the side of the longitudinal ribs; in step (3), a reinforcement cage needs to be placed in the gap between the two longitudinal ribs before pouring joint concrete.
与现有技术相比，本发明具有以下有益效果：本发明桥梁先在工厂预制组合梁再运至现场安装，施工快速简单，不需要现场立模，避免桥面大面积混凝土现场浇筑、养护困难及施工裂纹难控制等问题；并且混凝土预制桥面板与钢梁之间接合良好，避免群钉锚固，受力性能好；提高施工质量，施工快速简单，缩短工期，使组合结构受力合理。Compared with the prior art, the present invention has the following beneficial effects: the bridge of the present invention is prefabricated in the factory and then transported to the site for installation. The construction is fast and simple, and does not require on-site formwork, which avoids large-area concrete pouring on the bridge deck, maintenance difficulties and construction problems. Cracks are difficult to control and other problems; and the joint between the prefabricated concrete bridge deck and the steel beam is good, avoiding group nail anchorage, and the mechanical performance is good; the construction quality is improved, the construction is fast and simple, the construction period is shortened, and the force of the combined structure is reasonable.
为使本发明的目的、技术方案及优点更加清楚明白，以下将通过具体实施例和相关附图，对本发明作进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings.
附图说明Description of drawings
图1是本发明实施例一组合梁构造示意图；Fig. 1 is a schematic view of the structure of a composite beam according to an embodiment of the present invention;
图2是本发明实施例一桥梁构造示意图；Fig. 2 is a schematic diagram of a bridge structure according to Embodiment 1 of the present invention;
图3是本发明实施例一组合梁间连接示意图；Fig. 3 is a schematic diagram of connection between composite beams according to Embodiment 1 of the present invention;
图4是本发明实施例二组合梁构造示意图；Fig. 4 is a schematic diagram of the structure of a composite beam according to Embodiment 2 of the present invention;
图5是本发明实施例二桥梁构造示意图；Fig. 5 is a schematic diagram of the bridge structure of the second embodiment of the present invention;
图6是本发明实施例二组合梁间连接示意图；Fig. 6 is a schematic diagram of connection between composite beams according to Embodiment 2 of the present invention;
图7是本发明实施例三组合梁间连接示意图；Fig. 7 is a schematic diagram of the connection between composite beams according to Embodiment 3 of the present invention;
图8是本发明实施例四桥梁构造示意图；Fig. 8 is a schematic diagram of the bridge structure of Embodiment 4 of the present invention;
图9是本发明实施例五桥梁构造示意图；Fig. 9 is a schematic diagram of the bridge structure of Embodiment 5 of the present invention;
图10是本发明实施例六预桥梁构造示意图；Fig. 10 is a schematic diagram of the sixth pre-bridge structure of the embodiment of the present invention;
图中标号说明：1-混凝土预制桥面板；2-钢梁；3-剪力连接件；4-桥面板内钢筋；5-环形箍筋；6-加劲肋；7-纵肋板；8-螺栓孔；9-螺栓；10-接缝混凝土；11-腹板；12-连接钢板；13-钢筋笼。14-桥面板肋板、15-环形钢筋、16-上翼缘钢板。Explanation of symbols in the figure: 1-concrete prefabricated bridge deck; 2-steel beam; Bolt hole; 9-bolt; 10-joint concrete; 11-web; 12-connecting steel plate; 13-reinforcement cage. 14-bridge deck ribs, 15-circular reinforcement, 16-upper flange steel plate.
具体实施方式Detailed ways
实施一：如图1~3所示，一种装配式钢-混凝土组合结构桥梁，所述桥梁宽度方向至少由两片组合梁拼接而成，所述组合梁包括混凝土预制桥面板1和用以支撑混凝土预制桥面板1的钢梁2，钢梁2截面可为工字形，，钢梁上方设置有位于混凝土预制桥面板下方的上翼缘钢板16，上翼缘钢板16与钢梁2上端焊接在一起；上翼缘钢板16上焊接有将混凝土预制桥面板1和上翼缘钢板16连接成整体的剪力连接件3，在组合梁两侧的上翼缘钢板16边缘具有纵肋板7，相邻两片组合梁通过邻近的两纵肋板7连接在一起，混凝土预制桥面板1、上翼缘钢板16和钢梁2形成的组合梁整体可以再工厂预制在运至现场安装，避免现场浇筑和养护困难，施工裂纹易控制，质量稳定性好。Implementation 1: As shown in Figures 1 to 3, a prefabricated steel-concrete composite structure bridge is formed by splicing at least two composite beams in the width direction of the bridge, and the composite beam includes a concrete prefabricated bridge deck 1 and a The steel girder 2 supporting the concrete prefabricated bridge deck 1, the cross section of the steel girder 2 can be I-shaped, and the upper flange steel plate 16 located below the concrete prefabricated bridge deck is arranged above the steel girder, and the upper flange steel plate 16 is welded to the upper end of the steel girder 2 Together; the upper flange steel plate 16 is welded with a shear connector 3 that connects the concrete prefabricated bridge deck 1 and the upper flange steel plate 16 into a whole, and there are longitudinal ribs 7 on the edge of the upper flange steel plate 16 on both sides of the composite beam , the two adjacent composite beams are connected together by the adjacent two longitudinal ribs 7, and the composite beam formed by the prefabricated concrete bridge deck 1, the upper flange steel plate 16 and the steel beam 2 can be prefabricated in the factory before being transported to the site for installation, avoiding On-site pouring and maintenance are difficult, construction cracks are easy to control, and the quality is stable.
在工厂预制组合梁时，以上翼缘钢板作为底模，预制的组合梁带有钢梁和混凝土预制桥面板1，不需要现场立模；混凝土预制桥面板1浇筑在工厂中进行，减少现场浇筑及养护困难，施工裂纹易控制，质量稳定性好，并且混凝土预制桥面板1与钢梁之间接合良好；避免群钉锚固，受力性能好，提高施工质量，施工快速简单，使组合结构受力合理。When the composite girder is prefabricated in the factory, the above flange steel plate is used as the base form, and the prefabricated composite girder has steel girders and concrete prefabricated bridge deck 1, which does not require on-site formwork; the pouring of the concrete prefabricated bridge deck 1 is carried out in the factory, reducing on-site pouring and maintenance is difficult, construction cracks are easy to control, quality stability is good, and the joint between the concrete prefabricated bridge deck 1 and the steel beam is good; group nail anchorage is avoided, the mechanical performance is good, the construction quality is improved, the construction is fast and simple, and the combined structure is protected. The force is reasonable.
在本实施例中，相邻两片组合梁的混凝土预制桥面板之间留有用以浇筑有接缝混凝土10的现浇接缝，现浇接缝的宽度为300mm~800mm；现浇接缝处的上翼缘钢板上布置有将接缝混凝土与位于其下部上翼缘钢板连接在一起的剪力连接件3。In this embodiment, there are cast-in-place joints for pouring joint concrete 10 between the concrete prefabricated bridge decks of two adjacent composite beams, and the width of the cast-in-place joints is 300 mm to 800 mm; The shear connector 3 connecting the joint concrete and the lower upper flange steel plate is arranged on the upper flange steel plate.
在本实施例中，混凝土预制桥面板和接缝混凝土由普通混凝土或超高性能混凝土或钢纤维混凝土或高性能混凝土浇筑而成。In this embodiment, the concrete prefabricated bridge deck and joint concrete are poured from ordinary concrete or ultra-high performance concrete or steel fiber concrete or high performance concrete.
在本实施例中，组合梁中混凝土预制桥面板1内分布双层沿纵向设置的桥面板内钢筋4以及沿横向设置有环形箍筋5，环形箍筋5两端穿出混凝土预制桥面板1两侧面，上翼缘钢板16两侧边缘伸出混凝土预制桥面板1两侧边沿（即上翼缘钢板宽度大于混凝土预制桥面板1宽度）；现浇接缝内设置有将两环形箍筋端部连接在一起的环形钢筋15。In this embodiment, the concrete prefabricated bridge deck 1 in the composite beam is distributed with double-layer steel bars 4 longitudinally arranged in the bridge deck and annular stirrups 5 arranged transversely, and the two ends of the annular stirrups 5 pass through the concrete prefabricated bridge deck 1 On both sides, the edges on both sides of the upper flange steel plate 16 protrude from both sides of the concrete prefabricated bridge deck 1 (that is, the width of the upper flange steel plate is greater than the width of the concrete prefabricated bridge deck 1); The annular steel bar 15 that part is connected together.
在本实施例中，连接在一起的两纵肋板7之间留有5~20mm的间隙，纵肋板7为平板形，纵肋板7上开设有螺栓孔8，相邻两片组合梁之间的纵肋板通过螺栓9连接在一起，螺栓9采用高强螺栓；两纵肋板之间的间隙中填充有高强水泥浆或橡胶垫。In this embodiment, there is a gap of 5-20 mm between the two longitudinal ribs 7 connected together. The longitudinal ribs 7 are in the shape of a flat plate. The longitudinal ribs between them are connected together by bolts 9, and the bolts 9 are high-strength bolts; the gap between the two longitudinal ribs is filled with high-strength cement slurry or rubber pads.
在本实施例中，所述钢梁和上翼缘钢板上均设置有加劲肋6。In this embodiment, stiffeners 6 are provided on both the steel beam and the upper flange steel plate.
一种如上所述装配式钢-混凝土组合结构桥梁的施工方法，包括以下步骤：A construction method for the assembled steel-concrete composite structure bridge as described above, comprising the following steps:
（1）预制钢—混凝土组合梁：在工厂制作具有上翼缘钢板16的钢梁，上翼缘钢板16两侧边缘焊接或弯折出纵肋板7，在纵肋板7上开螺栓孔8，上翼缘钢板上焊接剪力连接件3；然后在上翼缘钢板16上安装用以浇筑混凝土预制桥面板的侧模板，绑扎桥面板内纵向钢筋4和环形箍筋5，浇筑混凝土预制桥面板1，并进行混凝土养护后拆除模板；(1) Prefabricated steel-concrete composite beam: the steel beam with upper flange steel plate 16 is manufactured in the factory, the edges of both sides of the upper flange steel plate 16 are welded or bent to form the longitudinal rib 7, and bolt holes are opened on the longitudinal rib 7 8. Weld the shear connector 3 on the upper flange steel plate; then install the side formwork for pouring the concrete prefabricated bridge deck on the upper flange steel plate 16, bind the longitudinal reinforcement 4 and the annular stirrup 5 in the bridge deck, and pour the concrete precast Bridge deck 1, and remove the formwork after concrete curing;
（2）钢—混凝土组合梁安装：将组合梁运至施工现场，并通过吊装或推顶将组合梁进行并排架设，相邻两片组合梁的混凝土预制桥面板之间留出现浇接缝；最后用螺栓9连接相邻两片组合梁的纵肋板7；(2) Installation of steel-concrete composite beams: transport the composite beams to the construction site, and erect the composite beams side by side by hoisting or pushing the top, leaving a cast-in-place joint between the concrete prefabricated bridge decks of two adjacent composite beams ; Connect the longitudinal ribs 7 of two adjacent composite beams with bolt 9 at last;
（3）现浇接缝混凝土施工：在现浇接缝内绑扎环形钢筋15，环形钢筋15与相邻两片组合梁的环形箍筋5端部焊接或绑扎在一起，并下现浇接缝中绑扎与环形钢筋及环形箍筋连接在一起的纵向钢筋，向现浇接缝中浇筑混凝土使得各片组合梁连接成整体，进行接缝混凝土养护；(3) Concrete construction of cast-in-place joints: tie ring-shaped steel bars 15 in the cast-in-place joints, weld or tie the ring-shaped steel bars 15 and the ends of ring stirrups 5 of two adjacent composite beams together, and place the cast-in-place joints Bind the longitudinal steel bars connected with the ring steel bars and ring stirrups in the center, and pour concrete into the cast-in-place joints so that the composite beams are connected as a whole, and the joint concrete curing is carried out;
（4）护栏、防撞墙及泄水孔道施工；(4) Construction of guardrails, anti-collision walls and drainage channels;
（5）桥面铺装施工。(5) Bridge deck pavement construction.
实施例二：如图4~6所示，在本实施例中，连接在一起的两纵肋板7之间留有100~300mm的间隙，纵肋板为L形，L形纵肋板的腹板11上开设有螺栓孔，相邻两片组合梁之间的纵肋板通过连接钢板12和螺栓9连接在一起，连接钢板12与腹板11之间通过螺栓9连接；现浇接缝中还设置有位于两纵肋板之间的钢筋笼13，两纵肋板之间的间隙中也浇筑有接缝混凝土10，纵肋板7上焊接有将接缝混凝土和上翼缘钢板连接在一起的剪力连接件3，在桥面较宽时，纵肋板之间的间隙形成小纵梁，利于主梁受力，同时减少了混凝土湿接缝施工量。Embodiment 2: As shown in Figures 4-6, in this embodiment, there is a gap of 100-300mm between the two longitudinal ribs 7 connected together, the longitudinal ribs are L-shaped, and the L-shaped longitudinal ribs There are bolt holes on the web 11, and the longitudinal ribs between two adjacent composite beams are connected together by the connecting steel plate 12 and the bolt 9, and the connecting steel plate 12 and the web 11 are connected by the bolt 9; the cast-in-place joint There is also a steel cage 13 located between the two longitudinal ribs, and the joint concrete 10 is also poured in the gap between the two longitudinal ribs, and the longitudinal rib 7 is welded to connect the joint concrete and the upper flange steel plate. When the shear connectors 3 are connected together, when the bridge deck is wide, the gap between the longitudinal ribs forms a small longitudinal beam, which is beneficial to the stress of the main beam and reduces the amount of concrete wet joint construction.
本实施例装配式钢-混凝土组合结构桥梁的施工方法只需要在实施例一的施工方法基础上增加以下步骤，步骤（1）中还需要在纵肋板侧面焊接剪力连接件3；步骤（2）中在浇筑接缝混凝土10之前需要在两纵肋板之间的间隙中放入钢筋笼13，钢筋笼13的高度高于上翼缘钢板16，向上伸入现浇接缝中。The construction method of the prefabricated steel-concrete composite structure bridge in this embodiment only needs to add the following steps on the basis of the construction method of Embodiment 1. In step (1), it is also necessary to weld the shear connector 3 on the side of the longitudinal rib; step ( 2) Before pouring the joint concrete 10, a reinforcement cage 13 needs to be placed in the gap between the two longitudinal ribs. The height of the reinforcement cage 13 is higher than the upper flange steel plate 16, and extends upward into the cast-in-place joint.
实施例三：如图7所示，本实施例与实施例一的区别在于纵肋板的构造不同，纵肋板下侧还具有向内90°弯折的腹板11使纵肋板形成L形结构。Embodiment 3: As shown in Figure 7, the difference between this embodiment and Embodiment 1 is that the structure of the longitudinal ribs is different, and the lower side of the longitudinal ribs also has a web 11 bent inward at 90° so that the longitudinal ribs form an L shaped structure.
实施例四：如图8所示，本实施例与实施例二的区别在于：本实施例钢梁截面为箱形截面。Embodiment 4: As shown in FIG. 8 , the difference between this embodiment and Embodiment 2 is that the section of the steel beam in this embodiment is a box-shaped section.
实施例五：如图9所示，本实施例与实施例二的区别在于：本实施例钢梁截面为槽形截面。Embodiment 5: As shown in FIG. 9 , the difference between this embodiment and Embodiment 2 is that the cross-section of the steel beam in this embodiment is a channel-shaped cross-section.
实施例六：如图10所示，本实施例与实施例二的区别在于上翼缘钢板构造不同，本实施例中，组合梁的上翼缘钢板由多块上翼缘钢板间隔排列而成，纵肋板设置在位于最外侧的上翼缘钢板上，位于中部的上翼缘钢板与钢梁焊接在一起；混凝土预制桥面板底面位于相邻两上翼缘钢板之间的间隔处设置有桥面板肋板。Embodiment 6: As shown in Figure 10, the difference between this embodiment and Embodiment 2 is that the structure of the upper flange steel plate is different. In this embodiment, the upper flange steel plate of the composite beam is formed by a plurality of upper flange steel plates arranged at intervals , the longitudinal ribs are set on the outermost upper flange steel plate, and the middle upper flange steel plate is welded with the steel girder; the bottom of the concrete prefabricated bridge deck is located at the interval between two adjacent upper flange steel plates. Bridge deck ribs.
上列较佳实施例，对本发明的目的、技术方案和优点进行了进一步详细说明，所应理解的是，以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above-listed preferred embodiments have further described the purpose, technical solutions and advantages of the present invention in detail. It should be understood that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of the present invention.
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| JPH07216826A (en) * | 1994-01-28 | 1995-08-15 | Mitsubishi Heavy Ind Ltd | Joint structure between floor slab and steel girder in precast concrete floor slab composite girder bridge |
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| CN102154983A (en) * | 2011-05-17 | 2011-08-17 | 四川省交通运输厅公路规划勘察设计研究院 | Steel box structure of combined bridge deck |
| CN103741577A (en) * | 2013-12-30 | 2014-04-23 | 郑州大学 | T-shaped beam bridge with lower flat connection and construction method of T-shaped beam bridge |
| CN105064210A (en) * | 2015-08-25 | 2015-11-18 | 中铁大桥勘测设计院集团有限公司 | Steel-concrete combined structure having corrosion resistant performance and construction method thereof |
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