CN103541301B - Hinge joint structure with perforated steel plate and construction method of hinge joint structure - Google Patents
Hinge joint structure with perforated steel plate and construction method of hinge joint structure Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 105
- 239000010959 steel Substances 0.000 title claims abstract description 105
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 238000009415 formwork Methods 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 3
- 201000010099 disease Diseases 0.000 abstract description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 3
- 229910000746 Structural steel Inorganic materials 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 description 11
- 238000003466 welding Methods 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 3
- 208000012659 Joint disease Diseases 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000004570 mortar (masonry) Substances 0.000 description 1
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Abstract
本发明涉及一种带开孔钢板的装配式空心板桥铰缝构造及其施工方法，包括预制空心板、铰缝及开孔钢板，所述预制空心板制作时先埋设钢板，所述开孔钢板焊接在预埋钢板上，所述铰缝中布置交叉钢筋及纵向钢筋，所述铰缝采用普通混凝土或者微膨胀混凝土。本发明中的开孔钢板能够有效地限制并阻止空心板与铰缝结合面的裂缝由底部向上拓展，提高铰缝构造传递荷载能力及使用寿命，且降低维护成本，施工简便，克服了目前国内装配式空心板桥铰缝结合面构造钢筋凿出困难、受力不明确、实际应用中易出现病害的缺点。
The invention relates to an assembled hollow slab bridge hinge joint structure with perforated steel plates and a construction method thereof, comprising prefabricated hollow slabs, hinge joints and perforated steel plates. The steel plate is welded on the pre-embedded steel plate, the intersecting steel bar and the longitudinal steel bar are arranged in the hinge joint, and the hinge joint adopts ordinary concrete or micro-expansion concrete. The perforated steel plate in the present invention can effectively limit and prevent the cracks on the joint surface of the hollow plate and the hinge joint from expanding upward from the bottom, improve the load transfer capacity and service life of the hinge joint structure, reduce maintenance costs, and facilitate construction, which overcomes the current domestic Prefabricated hollow slab bridges have the disadvantages of difficulty in chiseling structural steel bars at the joint surface of hinge joints, unclear stress, and prone to disease in practical applications.
Description
技术领域 technical field
本发明涉及一种带开孔钢板的铰缝构造及其施工方法，属于土木建筑技术领域。 The invention relates to a hinged joint structure with perforated steel plates and a construction method thereof, belonging to the technical field of civil engineering.
背景技术 Background technique
据有关资料表明，截止2010年装配式空心板梁桥在我国公路桥梁系统中所占的比例达到了64%。这类桥梁具有建筑高度低、便于预制、设计及施工简便等优点。装配式空心板桥通过现浇混凝土企口缝构造来实现荷载的横向分布，防止单根梁受力过大。通过对正在运营的装配式空心板桥进行现场调查发现，由于设计、施工及运营阶段的诸多原因铰缝底部渗水泛白、底部砂浆脱落、纵向开裂等铰缝病害称为这类桥梁的主要病害形式。随着铰缝病害的不断发展，铰缝构造逐步丧失横向传递荷载的能力，最终导致单板受力的现象出现，对装配式空心板桥寿命及行车安全造成巨大威胁。 According to relevant data, as of 2010, the proportion of prefabricated hollow slab girder bridges in my country's highway bridge system reached 64%. This type of bridge has the advantages of low building height, easy prefabrication, and simple design and construction. The prefabricated hollow slab bridge realizes the lateral distribution of load through the cast-in-place concrete groove-and-groove joint structure to prevent excessive stress on a single beam. Through the on-site investigation of the prefabricated hollow slab bridges in operation, it was found that due to many reasons in the design, construction and operation stages, the hinge joint diseases such as water seepage and whitening at the bottom of the hinge joint, bottom mortar falling off, and longitudinal cracking are called the main diseases of this type of bridge. form. With the continuous development of hinge joint disease, the hinge joint structure gradually loses the ability to transmit loads laterally, which eventually leads to the phenomenon of single-slab stress, which poses a huge threat to the service life and driving safety of prefabricated hollow slab bridges.
国内目前针对铰缝的加固和改进措施大致可以分成两类：一是横向整体性能的提升，二是铰缝构造的改进。横向整体性能的提升主要有两种方法：（1）横向预应力钢束。在跨中及端部设置体外预应力钢束或者在跨中设置一道横隔梁并在梁内穿预应力钢束，该措施涉及到预应力施工工艺，操作上相对复杂。此外根据美国的装配式空心板桥相关资料，采用横向预应力的措施后还是会有诸如桥面纵向开裂、铰缝底部渗水泛白等病害出现；（2）在铰缝两侧相邻的空心板底部植入锚栓来设置连接钢板或者连接钢筋，或是通过预埋角钢并实施焊接，使得相邻板之间的变形协调、一致。这类措施会导致空心板底部出现纵向裂缝且会在一定程度下影响桥下净空。铰缝构造的改进集中在三类措施：（1）将铰缝内普遍采用的交叉钢筋用近似尖端椭圆状的箍筋代替，这类措施在施工上难度较大且力学理念不清晰；（2）在铰缝侧壁预埋一段带孔长钢板，这类措施在施工时钢板下侧的铰缝混凝土施工时会存在浇捣困难，且由于其并未通长设置，对结合面裂缝的限制作用较为有限；（3）结合面布置构造钢筋。这些构造钢筋在预制时均需要先紧贴侧模，在拆模后需要扳出。若钢筋与侧模贴合不紧密则会造成钢筋埋入混凝土的现象，使得钢筋难以被发现并造成难以弯出或根本无法弯出，即使可以找出铰缝钢筋的具体位置，需将混凝土凿除后才能弯出，工作量和工作强度较大。 The current reinforcement and improvement measures for hinge joints in China can be roughly divided into two categories: one is the improvement of the overall transverse performance, and the other is the improvement of the hinge joint structure. There are two main ways to improve the overall performance of the transverse direction: (1) transverse prestressed steel beams. Setting external prestressed steel beams at the mid-span and ends or setting a diaphragm beam at the mid-span and passing prestressed steel beams inside the beam involves prestressing construction technology and is relatively complicated in operation. In addition, according to the relevant data of prefabricated hollow slab bridges in the United States, after adopting transverse prestressing measures, there will still be defects such as longitudinal cracking of the bridge deck, water seepage and whitening at the bottom of the hinge joint; Anchor bolts are implanted at the bottom of the slab to set the connecting steel plate or connecting steel bar, or the angle steel is embedded and welded, so that the deformation between adjacent slabs is coordinated and consistent. Such measures lead to longitudinal cracks in the bottom of the hollow-core slab and to a certain extent affect the clearance under the bridge. The improvement of the hinge joint structure focuses on three types of measures: (1) Replace the commonly used cross bars in the hinge joint with stirrups with approximately pointed oval shapes. This kind of measure is difficult in construction and the mechanical concept is not clear; (2) ) to pre-embed a section of long steel plate with holes on the side wall of the hinge joint. This kind of measure will have difficulties in pouring and tamping the hinge joint concrete under the steel plate during construction, and because it is not set all the way, it will limit the cracks on the joint surface The effect is relatively limited; (3) The structural reinforcement is arranged on the joint surface. These structural steel bars need to be attached to the side formwork during prefabrication, and need to be pulled out after the formwork is removed. If the reinforcement and the side formwork are not tightly fitted, the reinforcement will be buried in the concrete, making it difficult to find the reinforcement and make it difficult or impossible to bend out. Even if the specific position of the hinged reinforcement can be found, the concrete needs to be chiseled It can only be bent out after removal, and the workload and work intensity are relatively large.
结合目前的现场调查、试验研究和有限元分析结果可知，装配式空心板桥的空心板与铰缝的结合面是其薄弱环节。研究表明在外荷载不断增加的情况下，空心板与铰缝结合面从底部开裂，并沿着结合面不断向上拓展，最终形成通缝。 Combined with the current field investigation, experimental research and finite element analysis results, it can be known that the joint surface between the hollow slab and the hinge joint of the prefabricated hollow slab bridge is its weak link. Research shows that under the condition of increasing external load, the joint surface of hollow slab and hinge joint cracks from the bottom, and expands upward along the joint surface, finally forming a through joint.
发明内容 Contents of the invention
为了克服目前国内铰缝构造的不足，本发明所要解决的技术问题是提供一种带开孔钢板的铰缝构造，提高采用这种新型铰缝构造的装配式空心板桥横向连接的可靠性和耐久性。 In order to overcome the deficiencies of the current domestic hinge joint structure, the technical problem to be solved by the present invention is to provide a hinge joint structure with perforated steel plates to improve the reliability and reliability of the lateral connection of the assembled hollow slab bridge adopting this new hinge joint structure. durability.
为了实现上述目的，本发明的技术方案是：一种带开孔钢板的铰缝构造，所述预制空心板制作时先埋设钢板，所述开孔钢板焊接在预埋钢板上，所述铰缝中布置交叉钢筋及纵向钢筋，所述铰缝采用普通混凝土或者微膨胀混凝土。 In order to achieve the above object, the technical solution of the present invention is: a hinged joint structure with a perforated steel plate. When the prefabricated hollow plate is produced, the steel plate is first embedded, and the perforated steel plate is welded on the pre-embedded steel plate. The intersecting steel bars and longitudinal steel bars are arranged in the center, and the hinged joints are made of ordinary concrete or micro-expansion concrete.
进一步的，所述的预制空心板在制作时按照设计位置将预埋钢板与箍筋焊接，可使预埋钢板焊接侧的中点置于空心板与铰缝上、下部结合面的交界点处。 Further, when the prefabricated hollow slab is manufactured, the pre-embedded steel plate and the stirrup are welded according to the designed position, so that the midpoint of the welded side of the pre-embedded steel plate can be placed at the junction of the hollow slab and the upper and lower joint surfaces of the hinge joint .
进一步的，所述预制空心板在拆除模板后将预埋钢板预埋钢板外露面的浮浆清除，并清扫干净。 Further, after the formwork is removed for the prefabricated hollow slab, the laitance on the exposed surface of the pre-embedded steel plate is removed and cleaned.
进一步的，所述开孔钢板宽度宽度为b，在钢板的非焊接侧上开设半径为b/2、纵向间距为b的半圆孔，钢板沿着纵桥向的长度接近空心板预制长度或与预制长度相同。 Further, the width of the perforated steel plate is b, semicircular holes with a radius of b/2 and a longitudinal spacing of b are opened on the non-welding side of the steel plate, and the length of the steel plate along the longitudinal bridge direction is close to the prefabricated length of the hollow plate or is the same as Prefabricated to the same length.
进一步的，所述铰缝内沿纵桥向布置间距为15—30cm的交叉钢筋及在交叉钢筋底部的纵向钢筋。 Further, the intersecting reinforcement with a spacing of 15-30 cm and the longitudinal reinforcement at the bottom of the intersecting reinforcement are arranged in the hinge joint along the longitudinal bridge direction.
同时，本发明还提供一种带开孔钢板的铰缝构造的施工方法，按以下步骤进行：（1）在预制空心板制作时，将预埋钢板按照设计位置焊接在箍筋上，可使预埋钢板焊接侧的中点置于空心板与铰缝上、下部结合面的交界点处；（2）拆除模板后将将预埋钢板预埋钢板外露面的浮浆清除，并清扫干净；（3）将开孔钢板焊接侧焊接在预埋钢板外露面的中点位置；（4）将铰缝纵向受力钢筋与交叉钢筋绑扎成形后放入铰缝，并浇筑铰缝混凝土。 At the same time, the present invention also provides a construction method for the hinged joint structure of the steel plate with holes, which is carried out in the following steps: (1) When making the prefabricated hollow plate, the pre-embedded steel plate is welded on the stirrup according to the designed position, so that The midpoint of the welding side of the pre-embedded steel plate is placed at the junction of the hollow plate and the upper and lower joint surfaces of the hinge joint; (2) After the formwork is removed, the laitance on the exposed surface of the pre-embedded steel plate is removed and cleaned; (3) Weld the welded side of the perforated steel plate to the midpoint of the exposed surface of the pre-embedded steel plate; (4) Bind the longitudinally stressed steel bar and the cross steel bar into the hinge joint, and pour the hinge joint concrete.
进一步的，在步骤（3）中，所述开孔钢板的宽度为b，在钢板的非焊接侧上开设半径为b/2、纵向间距为b的半圆孔，钢板沿着纵桥向的长度接近空心板预制长度或与预制长度相同。 Further, in step (3), the width of the perforated steel plate is b, semicircular holes with a radius of b/2 and a longitudinal spacing of b are opened on the non-welded side of the steel plate, and the length of the steel plate along the longitudinal bridge direction Close to the prefabricated length of the hollow slab or the same as the prefabricated length.
进一步的，在步骤（4）中，所述交叉钢筋纵桥向间距为15—30cm，所述的铰缝纵向受力钢筋放置在交叉钢筋底部；所述混凝土为普通混凝土或者微膨胀混凝土，并采取一定的措施保证混凝土密实。 Further, in step (4), the longitudinal span of the intersecting steel bars is 15-30cm, and the longitudinally stressed steel bar of the hinged joint is placed at the bottom of the intersecting steel bars; the concrete is ordinary concrete or micro-expansion concrete, and Take certain measures to ensure that the concrete is dense.
由以上可知，本发明作为一种带开孔钢板的铰缝构造及其施工方法，能够有效地限制并阻止结合面裂缝向上拓展，提高铰缝构造传递荷载能力及使用寿命，且降低维护成本，施工简便，克服了目前国内装配式空心板桥铰缝结合面构造钢筋凿出困难、受力不明确、实际应用中易出现病害的缺点。 It can be seen from the above that the present invention, as a hinged joint structure with perforated steel plate and its construction method, can effectively limit and prevent the joint surface cracks from expanding upwards, improve the load transfer capacity and service life of the hinged joint structure, and reduce maintenance costs. The construction is simple, and it overcomes the shortcomings of the current domestic prefabricated hollow slab bridges, such as the difficulty of digging out the structural reinforcement of the hinge joint surface, unclear force, and easy occurrence of diseases in practical applications.
下面结合附图和具体实施方式对本发明作进一步详细的说明。 The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
附图说明 Description of drawings
图1为本发明实施例的主视图。 Fig. 1 is a front view of an embodiment of the present invention.
图2为开孔钢板俯视图。 Figure 2 is a top view of the perforated steel plate.
图3为预埋钢板剖面图。 Figure 3 is a sectional view of the pre-embedded steel plate.
图中 1-预制空心板，2-铰缝，3-空心板箍筋，4-开孔钢板，5-预埋钢板，6-交叉钢筋，7-铰缝纵向受力钢筋，1-1空心板与铰缝上、下部结合面的交界点处，4-1 开孔钢板焊接侧，4-2 开孔钢板非焊接侧，5-1 预埋钢板焊接侧，5-2 预埋钢板外露面。 In the figure 1- prefabricated hollow slab, 2- hinged joint, 3- hollow slab stirrup, 4- perforated steel plate, 5- embedded steel plate, 6- cross steel bar, 7- hinged joint longitudinal force reinforcement, 1-1 hollow At the junction of the plate and the upper and lower joint surfaces of the hinge joint, 4-1 The welding side of the perforated steel plate, 4-2 The non-welded side of the perforated steel plate, 5-1 The welded side of the pre-embedded steel plate, 5-2 The exposed surface of the pre-embedded steel plate .
具体实施方式 Detailed ways
如图1-3所示，一种带开孔钢板的铰缝构造，包括包括预制空心板1、铰缝2、开孔钢板4和预埋钢板5，所述预制空心板1在制作时先埋设预埋钢板5，所述开孔钢板4焊接在预埋钢板5上，所述铰缝2中布置交叉钢筋6及纵向钢筋7，所述铰缝2采用普通混凝土或者微膨胀混凝土。 As shown in Figures 1-3, a hinged joint structure with perforated steel plates includes a prefabricated hollow plate 1, a hinged joint 2, a perforated steel plate 4 and a pre-embedded steel plate 5, the prefabricated hollow plate 1 is first manufactured The pre-embedded steel plate 5 is buried, the perforated steel plate 4 is welded on the pre-embedded steel plate 5, the intersecting steel bar 6 and the longitudinal steel bar 7 are arranged in the hinge joint 2, and the hinge joint 2 is made of ordinary concrete or micro-expansion concrete.
在本实施例中，所述预制空心板1在制作时，将预埋钢板5的焊接侧5-1焊接在箍筋3上，可使预埋钢板焊接侧5-1的中点置于空心板与铰缝上、下部结合面的交界点处1-1。所述的预制空心板1在拆除模板后将预埋钢板5的外露面5-2表面的浮浆清除，并清扫干净。所述的开孔钢板4的焊接侧4-1焊接在预埋钢板外露面5-2的中点位置。所述的铰缝2中布置沿着纵桥向间距为15—30cm的交叉钢筋6及放置在交叉钢筋6底部的铰缝纵向受力钢筋7。 In this embodiment, when the prefabricated hollow plate 1 is produced, the welding side 5-1 of the embedded steel plate 5 is welded on the stirrup 3, so that the midpoint of the welded side 5-1 of the embedded steel plate can be placed in the hollow 1-1 at the junction point between the plate and the upper and lower joint surfaces of the hinge joint. In the prefabricated hollow slab 1, after the formwork is removed, the laitance on the surface of the exposed surface 5-2 of the embedded steel plate 5 is removed and cleaned. The welding side 4-1 of the perforated steel plate 4 is welded at the midpoint of the exposed surface 5-2 of the embedded steel plate. The intersecting steel bars 6 with a spacing of 15-30 cm along the longitudinal direction of the bridge and the longitudinally stressed steel bars 7 placed at the bottom of the intersecting steel bars 6 are arranged in the hinged joint 2 .
如图1—3所示，一种带开孔钢板的铰缝构造施工方法，按以下步骤进行： As shown in Figure 1-3, a construction method of hinged joint structure with perforated steel plate is carried out according to the following steps:
（1）在预制空心板1制作时，将预埋钢板5的焊接侧5-1按照设计位置焊接在箍筋3上，可使预埋钢板焊接侧5-1的中点置于空心板与铰缝上、下部结合面的交界点处1-1； (1) When making the prefabricated hollow plate 1, weld the welding side 5-1 of the embedded steel plate 5 to the stirrup 3 according to the designed position, so that the midpoint of the welded side 5-1 of the embedded steel plate can be placed between the hollow plate and the 1-1 at the junction of the upper and lower joint surfaces of the hinge joint;
（2）拆除模板后将钢板5的外露面5-2表面的浮浆清除，并清扫干净； (2) After removing the formwork, remove the laitance on the surface of the exposed surface 5-2 of the steel plate 5, and clean it up;
（3）将开孔钢板4的焊接侧4-1焊接在预埋钢板外露面5-2的中点位置； (3) Welding the welding side 4-1 of the perforated steel plate 4 to the midpoint of the exposed surface 5-2 of the pre-embedded steel plate;
（4）将铰缝纵向受力钢筋7与交叉钢筋6绑扎成形后放入铰缝2，并浇筑铰缝混凝土。 (4) Bind the longitudinally stressed steel bar 7 and the cross steel bar 6 into the hinged joint 2, and pour concrete for the hinged joint.
在本实施例中，步骤（3）中所述开孔钢板4的宽度为b，在钢板的非焊接侧4-2上开设半径为b/2、纵向间距为b的半圆孔。步骤（4）中所述交叉钢筋6纵桥向间距为15—30cm，所述的铰缝纵向受力钢筋7放置在交叉钢筋6底部；所述混凝土为普通混凝土或者微膨胀混凝土，并采取一定的措施保证混凝土密实。 In this embodiment, the width of the perforated steel plate 4 in step (3) is b, and semicircular holes with a radius of b/2 and a longitudinal spacing of b are opened on the non-welding side 4-2 of the steel plate. In step (4), the intersecting reinforcing bars 6 have a longitudinal spacing of 15-30 cm, and the hinged joint longitudinally stressed reinforcing bars 7 are placed at the bottom of the intersecting reinforcing bars 6; the concrete is ordinary concrete or micro-expansion concrete, and a certain measures to ensure that the concrete is dense.
本发明不局限于上述的最佳实施方式，任何人在本发明的启示下都可以得出其他各种形式的装配式空心板桥铰缝构造。凡依本发明申请专利范围所做的均等变化与修饰，皆应属本发明的涵盖范围。 The present invention is not limited to the above-mentioned best implementation mode, and anyone can draw other various forms of hinge joint structures of fabricated hollow slab bridges under the enlightenment of the present invention. All equivalent changes and modifications made according to the patent scope of the present invention shall fall within the scope of the present invention.
Claims (3)
Priority Applications (1)
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| CN107687128A (en) * | 2017-10-20 | 2018-02-13 | 福州大学 | Using the assembly hollow slab bridges structure and its construction method of del hinge seam |
| CN109537464B (en) * | 2018-12-11 | 2023-08-04 | 中交一公局土木工程建筑研究院有限公司 | Assembled bent cap-pier stud reserved joint straight joint model template |
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