CN107514083A - Side hangs reinforcing bar band shear key reinforced concrete slab structure and connection method - Google Patents
Side hangs reinforcing bar band shear key reinforced concrete slab structure and connection method Download PDFInfo
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- 239000004567 concrete Substances 0.000 claims abstract description 116
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- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
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Abstract
Description
技术领域technical field
本发明涉及预制装配式混凝土结构建筑领域,具体为一种侧悬钢筋带抗剪键混凝土叠合楼板结构及连接方法。The invention relates to the field of prefabricated concrete structure buildings, in particular to a side-hanging reinforced concrete composite floor structure with shear keys and a connection method.
背景技术Background technique
目前,在实际装配式混凝土建筑中,楼板普遍应用的是自承式钢筋桁架混凝土叠合板,该种叠合板具有楼板较厚、工程造价高等缺点。为了解决上述问题,在先前的发明中,带抗剪键的混凝土叠合板楼板、预制构造和施工方法(公开号CN102839773A),但在该发明中,未涉及带抗剪键的混凝土叠合楼板如何与梁连接、带抗剪键的混凝土叠合楼板与带抗剪键的混凝土叠合楼板之间如何连接。为了解决上述问题,在先前的发明中,改进的带抗剪键的混凝土叠合板楼板结构及连接方法(公开号CN104727475A),该种结构及连接方法,主要还是采用钢筋混凝土的设计思想,制作施工略为复杂。At present, in the actual prefabricated concrete buildings, self-supporting reinforced truss concrete laminated slabs are commonly used in floor slabs. This kind of laminated slab has the disadvantages of thick floor slabs and high engineering cost. In order to solve the above problems, in previous inventions, concrete laminated slabs with shear keys, prefabricated structures and construction methods (publication number CN102839773A), but in this invention, how the concrete laminated slabs with shear keys are not involved How to connect with beams, concrete laminated slab with shear key and concrete laminated slab with shear key. In order to solve the above problems, in the previous invention, the improved concrete laminated slab structure and connection method with shear keys (public number CN104727475A), this kind of structure and connection method mainly adopt the design idea of reinforced concrete, and make construction slightly more complicated.
为此,本发明提出侧悬钢筋连接带抗剪键混凝土叠合楼板结构及连接方法,实现各预制构件之间拉力的传力,具有制作更方便,传力更可靠、现场拼装更简单,施工质量更容易保证等优点。For this reason, the present invention proposes a concrete laminated floor structure with shear keys connected by side-hung steel bars and a connection method to realize tension transmission between prefabricated components. Quality is easier to guarantee and other advantages.
发明内容Contents of the invention
本发明的目的提供一种侧悬钢筋带抗剪键混凝土叠合楼板结构及连接方法,实现侧悬钢筋带抗剪键混凝土叠合楼板与梁连接、侧悬钢筋带抗剪键混凝土叠合楼板与侧悬钢筋带抗剪键混凝土叠合楼板之间的连接,满足实际工程设计施工需要。The purpose of the present invention is to provide a side-hung steel bar with shear key concrete laminated floor structure and connection method, to realize the connection between the side-hung steel bar with shear key concrete laminated floor and the beam, and the side-hung steel bar with shear key concrete laminated floor The connection with the side-hanging reinforced concrete laminated floor with shear keys meets the needs of actual engineering design and construction.
本发明的技术方案:Technical scheme of the present invention:
一种侧悬钢筋带抗剪键混凝土叠合楼板结构,该结构包括:抗剪键、预制混凝土底板、混凝土现浇层,预制混凝土底板的相邻侧面对接,每个预制混凝土底板上顶部设置抗剪键和混凝土现浇层;在预制混凝土底板的板底设有U型连接钢筋,U型连接钢筋包括纵向U型钢筋和横向U型钢筋,纵向U型钢筋和横向U型钢筋组成网状结构的U型连接钢筋。A concrete composite floor structure with side-hanging steel bars and shear keys, the structure includes: shear keys, prefabricated concrete bottom slabs, concrete cast-in-place layers, adjacent sides of the prefabricated concrete bottom slabs are butted, and the top of each precast concrete bottom slab is provided with a Shear key and concrete cast-in-place layer; there are U-shaped connecting reinforcements at the bottom of the precast concrete floor. The U-shaped connecting reinforcements include longitudinal U-shaped reinforcements and transverse U-shaped reinforcements. The longitudinal U-shaped reinforcements and transverse U-shaped reinforcements form a network structure. U-shaped connecting bars.
所述的侧悬钢筋带抗剪键混凝土叠合楼板结构,当侧悬钢筋带抗剪键混凝土叠合楼板与侧悬钢筋带抗剪键混凝土叠合楼板之间连接时,相邻两个预制混凝土底板的上部之间跨设反弯矩筋;当侧悬钢筋带抗剪键混凝土叠合楼板与中梁连接时,相邻两个预制混凝土底板的上部之间跨设反弯矩筋;当侧悬钢筋带抗剪键混凝土叠合楼板与边梁连接时,边梁上部与预制混凝土底板的上部之间跨设反弯矩筋。As for the composite floor slab structure of side-hung steel bars with shear keys, when the side-hung steel bars with shear keys are connected to the composite floor slabs of concrete with side-hung steel bars with shear keys, two adjacent prefabricated Anti-bending moment bars are set across the upper parts of the concrete bottom slabs; when the side-hanging reinforced concrete composite floor with shear keys is connected to the middle beam, anti-bending moment bars are set across the upper parts of two adjacent precast concrete bottom slabs; when When the side-hanging reinforced concrete composite floor with shear key is connected to the side beam, the anti-bending moment bar is spanned between the upper part of the side beam and the upper part of the precast concrete floor.
所述的侧悬钢筋带抗剪键混凝土叠合楼板结构,当侧悬钢筋带抗剪键混凝土叠合楼板与侧悬钢筋带抗剪键混凝土叠合楼板之间连接时,相邻两个预制混凝土底板的侧面之间通过配套的侧悬钢筋和连接钢板以及混凝土现浇层连接;当侧悬钢筋带抗剪键混凝土叠合楼板与中梁连接时,相邻两个预制混凝土底板的侧面与中梁顶部之间通过配套的侧悬钢筋、L型连接钢筋和连接钢板以及混凝土现浇层连接;当侧悬钢筋带抗剪键混凝土叠合楼板与边梁连接时,预制混凝土底板的侧面与边梁顶部之间通过配套的侧悬钢筋、L型连接钢筋和连接钢板以及混凝土现浇层连接。As for the composite floor slab structure of side-hung steel bars with shear keys, when the side-hung steel bars with shear keys are connected to the composite floor slabs of concrete with side-hung steel bars with shear keys, two adjacent prefabricated The sides of the concrete bottom slabs are connected through matching side hanging steel bars, connecting steel plates and concrete cast-in-place layers; The top of the middle girder is connected through the matching side hanging steel bar, L-shaped connecting steel bar, connecting steel plate and concrete cast-in-place layer; The tops of the side beams are connected by matching side hanging steel bars, L-shaped connecting steel bars, connecting steel plates and cast-in-place concrete layers.
所述的侧悬钢筋带抗剪键混凝土叠合楼板结构的拼接方法,侧悬钢筋带抗剪键混凝土叠合楼板与侧悬钢筋带抗剪键混凝土叠合楼板之间的拼接方法如下:The splicing method of the composite floor slab structure of side-hung reinforcement with shear key, the splicing method between the composite floor of concrete composite floor with side-hung reinforcement with shear key and the composite floor of concrete composite floor with side-hung reinforcement with shear key is as follows:
(1)将两块预制混凝土底板吊装到预定位置,预制混凝土底板相邻侧面的侧悬钢筋在同一水平位置,并且每个侧悬钢筋的两端分别与预制混凝土底板紧密接触,每个预制混凝土底板中部设有竖向部分;连接钢板上开设连接钢板上预留孔洞,所述连接钢板上预留孔洞沿横向排布,并与侧悬钢筋的竖向部分相对应,将连接钢板套入侧悬钢筋的竖向部分,并将侧悬钢筋伸入连接钢板的部分和连接钢板焊接在一起,或将侧悬钢筋伸出连接钢板的部分向下弯折,从而完成两块预制混凝土底板的板底钢筋的连接;同时,相邻两个预制混凝土底板的上部之间跨设反弯矩筋;(1) Hoist the two precast concrete bottom slabs to the predetermined position, the side hanging steel bars on the adjacent sides of the precast concrete bottom slabs are at the same horizontal position, and the two ends of each side hanging steel bar are in close contact with the precast concrete bottom slab respectively, each precast concrete bottom slab There is a vertical part in the middle of the bottom plate; holes reserved on the connecting steel plate are provided on the connecting steel plate, and the reserved holes on the connecting steel plate are arranged horizontally and correspond to the vertical part of the side hanging steel bar, and the connecting steel plate is inserted into the side The vertical part of the hanging steel bar, and the part of the side hanging steel bar extending into the connecting steel plate is welded together with the connecting steel plate, or the part of the side hanging steel bar protruding out of the connecting steel plate is bent downward, so as to complete the slabs of the two precast concrete floors The connection of the bottom reinforcement; at the same time, the upper part of the two adjacent precast concrete bottom slabs spans the anti-moment reinforcement;
(2)在上述连接的两块预制混凝土底板上浇筑混凝土现浇层,混凝土现浇层与预制混凝土底板通过抗剪键、侧悬钢筋和反弯矩筋连接成牢固结构。(2) The cast-in-place concrete layer is poured on the two prefabricated concrete bottom slabs connected above, and the cast-in-place concrete layer and the precast concrete bottom slab are connected to form a firm structure through shear keys, side hanging steel bars and anti-bending moment bars.
所述的侧悬钢筋带抗剪键混凝土叠合楼板结构的拼接方法,侧悬钢筋伸出连接钢板的部分向下弯折45°。In the splicing method of the concrete laminated floor structure with side-hanging steel bars with shear keys, the part of the side-hanging steel bars protruding from the connecting steel plate is bent downward by 45°.
所述的侧悬钢筋带抗剪键混凝土叠合楼板结构的拼接方法,侧悬钢筋带抗剪键混凝土叠合楼板与中梁的拼接方法如下:The splicing method of the side-hanging reinforced concrete laminated floor structure with shear keys, the splicing method of the side-hanging reinforced concrete laminated floors with shear keys and the middle beam are as follows:
(1)中梁在制作时,在中梁内预埋L型连接钢筋和箍筋,L型连接钢筋下端伸入箍筋中,L型连接钢筋的直径不小于U型连接钢筋的直径;(1) During the manufacture of the middle beam, the L-shaped connecting steel bars and stirrups are pre-embedded in the middle beam, and the lower end of the L-shaped connecting steel bars extends into the stirrups, and the diameter of the L-shaped connecting steel bars is not smaller than the diameter of the U-shaped connecting steel bars;
(2)将两块预制混凝土底板吊装到中梁两侧,两块预制混凝土底板的侧边底部与梁外侧边缘线相接,两块预制混凝土底板的侧悬钢筋在同一水平位置,并且侧悬钢筋的竖向部分与中梁中的L型连接钢筋的竖向部分紧密接触;将连接钢板套入侧悬钢筋及L型连接钢筋,并将侧悬钢筋与L型连接钢筋伸入连接钢板的部分和连接钢板焊接在一起,或将侧悬钢筋与L型连接钢筋伸入连接钢板的部分向下弯折,完成两块预制混凝土底板和中梁的钢筋连接;(2) Hoist the two precast concrete bottom slabs to both sides of the center beam, the side bottoms of the two precast concrete bottom slabs are connected to the outer edge line of the beam, the side hanging steel bars of the two precast concrete bottom slabs are at the same horizontal position, and the side hanging The vertical part of the steel bar is in close contact with the vertical part of the L-shaped connecting steel bar in the center beam; the connecting steel plate is inserted into the side hanging steel bar and the L-shaped connecting steel bar, and the side hanging steel bar and the L-shaped connecting steel bar are inserted into the connecting steel bar The part is welded together with the connecting steel plate, or the part of the side hanging steel bar and the L-shaped connecting steel bar extending into the connecting steel plate is bent downward to complete the steel bar connection between the two prefabricated concrete bottom slabs and the middle beam;
(3)在上述连接的两块预制混凝土底板上浇筑混凝土现浇层,混凝土现浇层与预制混凝土底板通过抗剪键、侧悬钢筋和反弯矩筋连接成牢固结构。(3) The cast-in-place concrete layer is poured on the two prefabricated concrete bottom slabs connected above, and the cast-in-place concrete layer and the precast concrete bottom slab are connected to form a firm structure through shear keys, side hanging steel bars and anti-bending moment bars.
所述的侧悬钢筋带抗剪键混凝土叠合楼板结构的拼接方法,侧悬钢筋与L型连接钢筋伸入连接钢板的部分向下弯折45°。In the splicing method of the side-hanging reinforcement with shear key concrete laminated floor structure, the part of the side-hanging reinforcement and the L-shaped connecting reinforcement extending into the connecting steel plate is bent downward by 45°.
所述的侧悬钢筋带抗剪键混凝土叠合楼板结构的拼接方法,侧悬钢筋带抗剪键混凝土叠合楼板与边梁的拼接方法如下:The splicing method of the side-hanging reinforced concrete laminated floor structure with shear keys, the splicing method of the side-hanging reinforced concrete laminated floors with shear keys and side beams are as follows:
(1)边梁在制作时,在边梁内预埋L型连接钢筋和箍筋,L型连接钢筋下端伸入箍筋中,L型连接钢筋的直径不小于U型连接钢筋的直径;(1) During the manufacture of side beams, L-shaped connecting steel bars and stirrups are pre-embedded in the side beams, and the lower end of the L-shaped connecting steel bars extends into the stirrups, and the diameter of the L-shaped connecting steel bars is not less than the diameter of the U-shaped connecting steel bars;
(2)将预制混凝土底板吊装到边梁上,将边梁中的L型连接钢筋的竖向部分与侧悬钢筋的竖向部分紧密接触,插入到连接钢板中并焊接在一起,或将侧悬钢筋与L型连接钢筋伸入连接钢板的部分向下弯折,完成预制混凝土底板与边梁的紧密连接;同时,边梁上部与预制混凝土底板的上部之间跨设反弯矩筋;(2) Hoist the prefabricated concrete bottom slab to the side beam, make the vertical part of the L-shaped connecting steel bar in the side beam closely contact with the vertical part of the side hanging steel bar, insert them into the connecting steel plate and weld them together, or connect the side beam The part of the hanging steel bar and the L-shaped connecting steel bar extending into the connecting steel plate is bent downward to complete the tight connection between the precast concrete floor and the side beam; at the same time, an anti-bending moment bar is straddled between the upper part of the side beam and the upper part of the precast concrete floor;
(3)在上述连接的预制混凝土底板上浇筑混凝土现浇层,混凝土现浇层与预制混凝土底板通过抗剪键、侧悬钢筋和反弯矩筋连接成牢固结构。(3) The cast-in-place concrete layer is poured on the above-mentioned connected precast concrete floor, and the cast-in-place concrete layer and the precast concrete floor are connected to form a firm structure through shear keys, side hanging steel bars and anti-bending moment bars.
所述的侧悬钢筋带抗剪键混凝土叠合楼板结构的拼接方法,预制混凝土底板的端部搭接到边梁的距离大于100mm,侧悬钢筋与L型连接钢筋伸入连接钢板的部分向下弯折45°。In the splicing method of the side-hanging steel bar with shear key concrete laminated floor structure, the distance between the end of the precast concrete floor and the edge beam is greater than 100 mm, and the part of the side hanging steel bar and the L-shaped connecting steel bar extending into the connecting steel plate is towards the Bend down 45°.
所述的侧悬钢筋带抗剪键混凝土叠合楼板结构的拼接方法,预制混凝土底板的四个侧面是预留孔洞钢制支护模板,预留孔洞钢制支护模板由相同的上下两钢条组成,预留孔洞钢制支护模板的中轴线处带有预留孔洞和固定钢环,上下两钢条之间分布的半个预留孔洞相对应组成预留孔洞,上下两钢条的外侧相对应处设置固定钢环,通过固定钢条插入固定钢环连接上下两钢条,形成整体的预留孔洞钢制支护模板;施工时,首先将纵向U型钢筋和横向U型钢筋两端部放置在预留孔洞钢制支护模板的下侧钢条的预留孔洞处,然后在对应放置预留孔洞钢制支护模板的上侧钢条,然后再将固定钢条插入固定钢环,形成框架结构;最后浇筑混凝土,待混凝土达到预期强度后,拆除固定钢条,撤去预留孔洞钢制支护模板,形成侧悬钢筋预制混凝土底板。In the splicing method of the side-hanging reinforced concrete laminated floor structure with shear keys, the four sides of the prefabricated concrete floor are steel support formwork with reserved holes, and the steel support formwork with reserved holes is composed of the same upper and lower steel support formwork. There are reserved holes and fixed steel rings on the central axis of the steel support formwork with reserved holes. Half of the reserved holes distributed between the upper and lower steel bars correspond to the reserved holes. The upper and lower steel bars A fixed steel ring is set at the corresponding position on the outside, and the upper and lower steel bars are connected by inserting the fixed steel bar into the fixed steel ring to form an integral steel support formwork with reserved holes; The end is placed in the reserved hole of the lower side steel bar of the reserved hole steel support formwork, and then the upper side steel bar of the reserved hole steel support formwork is placed correspondingly, and then the fixed steel bar is inserted into the fixed steel bar. Finally, the concrete is poured. After the concrete reaches the expected strength, the fixed steel bars are removed, and the steel support formwork with reserved holes is removed to form a precast concrete floor with side-hung reinforced bars.
本发明的优点及有益效果是:Advantage of the present invention and beneficial effect are:
1、本发明侧悬钢筋带抗剪键混凝土叠合楼板结构和连接方法,其与原带抗剪键混凝土叠合板楼板结构相比:将原带抗剪键混凝土叠合板楼板的预制混凝土底板底钢筋改为U型钢筋,U型钢筋从预制混凝土底板的侧面悬挑伸出(简称侧悬钢筋),通过侧悬钢筋和连接钢板传力,因此制作更简单,传力路径更简单明确,传力更可靠。1. The structure and connection method of the side-hanging reinforced concrete laminated slab with shear keys of the present invention is compared with the original concrete laminated slab structure with shear keys: the prefabricated concrete floor of the original concrete laminated slab with shear keys The steel bar is changed to U-shaped steel bar. The U-shaped steel bar is cantilevered from the side of the precast concrete floor (referred to as the side-hanging steel bar), and the force is transmitted through the side-hanging steel bar and the connecting steel plate. more reliable.
2、本发明侧悬钢筋带抗剪键混凝土叠合楼板结构和连接方法,通过用连接钢板固定预制混凝土底板的侧悬钢筋,实现板底钢筋弯矩产生拉应力的等效传递;通过在梁内预留L型钢筋并采用梁的L型钢筋与板的侧悬钢筋用连接钢板连接,实现预制混凝土底板板端在梁上的固定;现场拼装更简单,施工质量更容易保证。2. The structure and connection method of the composite floor slab structure and connection method of side-hanging steel bars with shear keys of the present invention, by fixing the side-hanging steel bars of the prefabricated concrete floor with connecting steel plates, the equivalent transfer of the tensile stress generated by the bending moment of the steel bars at the bottom of the slab is realized; L-shaped steel bars are reserved inside, and the L-shaped steel bars of the beams are connected with the side hanging steel bars of the slabs with connecting steel plates to realize the fixing of the precast concrete floor slab ends on the beams; on-site assembly is simpler and the construction quality is easier to guarantee.
3、本发明同样具有现场湿作业少,装配率高,节能环保、符合绿色建筑发展的要求等装配式混凝土结构的优点。3. The present invention also has the advantages of less on-site wet work, high assembly rate, energy saving and environmental protection, and meets the requirements of green building development.
附图说明Description of drawings
图1是U型连接钢筋三维图。Figure 1 is a three-dimensional diagram of a U-shaped connection steel bar.
图2是预留孔洞钢制支护模板三维图。Figure 2 is a three-dimensional view of the steel support template with reserved holes.
图3是布置抗剪键、钢制支护模板的预制混凝土底板的三维图。Fig. 3 is a three-dimensional view of the prefabricated concrete floor with shear keys and steel support formwork.
图4是侧悬钢筋预制混凝土底板制作完成的三维图。Figure 4 is a three-dimensional view of the prefabricated concrete floor with side-hung reinforcement.
图5是连接钢板的三维图。Fig. 5 is a three-dimensional view of joined steel plates.
图6是两块侧悬钢筋预制混凝土底板钢筋对接的三维图。Fig. 6 is a three-dimensional diagram of the butt joint of two pieces of side-hanging reinforcement prefabricated concrete bottom slab reinforcement.
图7是布置连接钢板的两块侧悬钢筋预制混凝土底板三维图。Fig. 7 is a three-dimensional view of two prefabricated concrete bottom slabs with side hanging steel bars arranged with connecting steel plates.
图8是图7的正视图。Fig. 8 is a front view of Fig. 7 .
图9是图8浇筑现浇层完成的三维图。Fig. 9 is a three-dimensional view of the completed cast-in-place layer in Fig. 8 .
图10是中梁15的配筋三维图。FIG. 10 is a three-dimensional diagram of reinforcement of the center beam 15 .
图11布置L型连接钢筋的主梁三维图。Fig. 11 The three-dimensional diagram of the main beam with L-shaped connecting reinforcement.
图12是中梁15与侧悬钢筋预制混凝土的钢筋对接的三维图。Fig. 12 is a three-dimensional view of the butt joint between the middle beam 15 and the reinforcement of the prefabricated concrete of the side hanging reinforcement.
图13是布置连接钢板的侧悬钢筋预制混凝土底板与主梁连接的三维图。Fig. 13 is a three-dimensional view of the connection between the side-hanging reinforced precast concrete floor and the main beam with the connecting steel plates arranged.
图14是侧悬钢筋预制混凝土底板与主梁连接完成的三维图。Figure 14 is a three-dimensional view of the completed connection between the side-hanging reinforced prefabricated concrete bottom slab and the main beam.
图15是边梁的配筋三维图。Fig. 15 is a three-dimensional diagram of the reinforcement of the edge beam.
图16是布置L型连接钢筋的边梁的三维视图。Fig. 16 is a three-dimensional view of an edge beam with L-shaped connecting bars arranged.
图17是边梁与侧悬钢筋预制混凝土的钢筋对接的三维视图。Fig. 17 is a three-dimensional view of the butt joint of the edge beam and the reinforcement of the side-hung reinforced precast concrete.
图18是布置连接钢板的侧悬钢筋预制混凝土底板与边梁连接的三维图。Fig. 18 is a three-dimensional view of the connection between the side-hanging reinforced prefabricated concrete bottom slab and the edge beams arranged with connecting steel plates.
图19是侧悬钢筋预制混凝土底板与边梁连接完成的三维图。Fig. 19 is a three-dimensional view of the connection between the side-hanging reinforced prefabricated concrete floor and the edge beam.
图中,1预留孔洞钢制支护模板;2预留孔洞;3固定钢条;4固定钢环;5抗剪键;7纵向U型钢筋;8横向U型钢筋;9侧悬钢筋;10预制混凝土底板;11连接钢板;12连接钢板上预留孔洞;13反弯矩筋;14混凝土现浇层;15中梁;16、L型连接钢筋;17箍筋;18边梁。In the figure, 1 steel support template with reserved holes; 2 reserved holes; 3 fixed steel bars; 4 fixed steel rings; 5 shear keys; 7 longitudinal U-shaped steel bars; 10 Prefabricated concrete floor; 11 Connecting steel plate; 12 Reserved holes on connecting steel plate; 13 Anti-bending moment reinforcement; 14 Concrete cast-in-place layer;
具体实施方式detailed description
如图1-图19所示,本发明的侧悬钢筋带抗剪键混凝土叠合楼板结构,主要包括抗剪键5、预制混凝土底板10、混凝土现浇层14,预制混凝土底板10的相邻侧面对接,每个预制混凝土底板10上顶部设置抗剪键5和混凝土现浇层14。其中,预制混凝土底板10的结构及制作过程如下:As shown in Figures 1-19, the composite floor structure of side-hung steel bar with shear key concrete of the present invention mainly includes a shear key 5, a prefabricated concrete floor 10, a cast-in-place concrete layer 14, and the adjacent precast concrete floor 10 The sides are docked, and the top of each precast concrete bottom slab 10 is provided with a shear key 5 and a cast-in-place concrete layer 14 . Wherein, the structure and manufacturing process of the prefabricated concrete base plate 10 are as follows:
如图1-图4所示,本发明在预制混凝土底板10上设有抗剪键5,根据实际工程中,抗剪键5需要承受的剪力和拉力确定抗剪键5的分布。预制混凝土底板10的四个侧面是预留孔洞钢制支护模板1,预留孔洞钢制支护模板1由相同的上下两钢条组成,预留孔洞钢制支护模板1的中轴线处带有预留孔洞2和固定钢环4,上下两钢条之间分布的半个预留孔洞相对应组成预留孔洞2,上下两钢条的外侧相对应处设置固定钢环4,通过固定钢条3插入固定钢环4连接上下两钢条,形成整体的预留孔洞钢制支护模板1。在预制混凝土底板10的板底设有U型连接钢筋,U型连接钢筋包括纵向U型钢筋7和横向U型钢筋8,纵向U型钢筋7和横向U型钢筋8组成网状结构的U型连接钢筋。As shown in Figures 1-4, the present invention provides shear keys 5 on the precast concrete floor 10, and the distribution of the shear keys 5 is determined according to the shear force and tension that the shear keys 5 need to bear in actual engineering. The four sides of the prefabricated concrete floor 10 are steel support formwork 1 with reserved holes. The steel support formwork 1 with reserved holes is composed of the same upper and lower steel bars. With a reserved hole 2 and a fixed steel ring 4, half of the reserved holes distributed between the upper and lower steel bars correspond to the reserved hole 2, and the fixed steel ring 4 is set on the outer side of the upper and lower steel bars. The steel bar 3 is inserted into the fixed steel ring 4 to connect the upper and lower steel bars to form an integral steel support template 1 with reserved holes. The bottom of the precast concrete floor 10 is provided with U-shaped connecting steel bars, the U-shaped connecting steel bars include longitudinal U-shaped steel bars 7 and transverse U-shaped steel bars 8, and the longitudinal U-shaped steel bars 7 and transverse U-shaped steel bars 8 form a U-shaped network structure. Connect the bars.
施工时,首先将纵向U型钢筋7和横向U型钢筋8两端部放置在预留孔洞钢制支护模板1的下侧钢条的预留孔洞处,然后在对应放置预留孔洞钢制支护模板1的上侧钢条,然后再将固定钢条3插入固定钢环4,形成框架结构(见图3)。最后浇筑混凝土,待混凝土达到预期强度后,拆除固定钢条3,撤去预留孔洞钢制支护模板1,形成侧悬钢筋预制混凝土底板10。During construction, first place the two ends of the longitudinal U-shaped steel bars 7 and the transverse U-shaped steel bars 8 in the reserved holes of the steel bars on the lower side of the reserved hole steel support formwork 1, and then place the reserved holes in the corresponding steel bars. Support the upper steel bars of the template 1, and then insert the fixed steel bars 3 into the fixed steel ring 4 to form a frame structure (see Figure 3). Concrete is poured at last, and after the concrete reaches the expected strength, the fixing steel bars 3 are removed, and the steel supporting formwork 1 with reserved holes is removed to form a prefabricated concrete floor 10 with side-hanging reinforcement.
预制混凝土底板的厚度与预留孔洞钢制支护模板1的高度一致,为实际设计叠合板厚度的一半。根据该处可承担的拉力不低于板底U型连接钢筋(图1)可承担的拉力计算确定抗剪键的形状和尺寸,同专利“抗剪键的混凝土叠合板楼板、预制构造和施工方法(CN102839773A)”和“改进的带抗剪键的混凝土叠合板楼板结构及连接方法(CN104727475A)”。The thickness of the prefabricated concrete floor is consistent with the height of the steel support formwork 1 with reserved holes, which is half of the actual design thickness of the laminated slab. Determine the shape and size of the shear key according to the tensile force that can be borne by this place is not lower than the tensile force that can be borne by the U-shaped connecting steel bar at the bottom of the slab (Fig. 1). Method (CN102839773A)” and “Improved Concrete Laminated Slab Floor Structure with Shear Keys and Connection Method (CN104727475A)”.
如图1至图19所示,侧悬钢筋带抗剪键混凝土叠合楼板在工程结构中的拼接结构和拼接方法主要包括三种:As shown in Figures 1 to 19, the splicing structure and splicing methods of side-hung reinforced concrete laminated slabs with shear keys in engineering structures mainly include three types:
(一)如图5-图9所示,侧悬钢筋带抗剪键混凝土叠合楼板与侧悬钢筋带抗剪键混凝土叠合楼板之间的连接,其连接结构和方法如下:(1) As shown in Figures 5-9, the connection structure and method for the connection between the composite floor slab with side-hanging reinforcement and shear key concrete and the composite floor slab with side-hanging reinforcement and shear key are as follows:
(1)如图5-图8所示,将两块预制混凝土底板10吊装到预定位置,预制混凝土底板10相邻侧面的侧悬钢筋9在同一水平位置,并且每个侧悬钢筋9的两端分别与预制混凝土底板10紧密接触,每个预制混凝土底板10中部设有竖向部分;连接钢板11上开设连接钢板上预留孔洞12,所述连接钢板上预留孔洞12沿横向排布,并与侧悬钢筋9的竖向部分相对应,将连接钢板11套入侧悬钢筋9的竖向部分,并将侧悬钢筋9伸入连接钢板11的部分和连接钢板11焊接在一起,或将侧悬钢筋9伸出连接钢板11的部分向下弯折45°,从而完成两块预制混凝土底板10的板底钢筋的连接。同时,相邻两个预制混凝土底板10的上部之间跨设反弯矩筋13。(1) As shown in Fig. 5-Fig. 8, two pieces of prefabricated concrete floor 10 are hoisted to the predetermined position, the side hanging steel bars 9 on the adjacent sides of the precast concrete floor 10 are at the same horizontal position, and the two sides of each side hanging steel bar 9 The ends are in close contact with the precast concrete floor 10 respectively, and the middle part of each precast concrete floor 10 is provided with a vertical part; the connecting steel plate 11 is provided with holes 12 reserved on the connecting steel plate, and the reserved holes 12 on the connecting steel plate are arranged along the horizontal direction, And corresponding to the vertical part of the side hanging steel bar 9, the connecting steel bar 11 is inserted into the vertical part of the side hanging steel bar 9, and the part of the side hanging steel bar 9 extending into the connecting steel bar 11 is welded together with the connecting steel plate 11, or The part of the side hanging steel bar 9 protruding from the connecting steel plate 11 is bent downward by 45°, so as to complete the connection of the steel bars at the bottom of the two prefabricated concrete bottom slabs 10 . At the same time, anti-bending moment tendons 13 are straddled between the upper parts of two adjacent precast concrete floor plates 10 .
(2)如图9所示,在上述连接的两块预制混凝土底板上浇筑混凝土现浇层14,混凝土现浇层14与预制混凝土底板10通过抗剪键5、侧悬钢筋9和反弯矩筋13连接成牢固结构。(2) As shown in Figure 9, the cast-in-place concrete layer 14 is poured on the above-mentioned two connected prefabricated concrete bottom slabs, and the cast-in-place concrete layer 14 and the precast concrete bottom slab 10 pass through the shear key 5, the side hanging steel bar 9 and the anti-bending moment. Ribs 13 are connected into a solid structure.
此种连接方法,同样适用于预制混凝土底板10端面和预制混凝土底板10端面对接连接的工况。This connection method is also applicable to the working condition of butt connection between the end face of the precast concrete bottom slab 10 and the end face of the precast concrete bottom slab 10 .
(二)如图10-图14所示,侧悬钢筋带抗剪键混凝土叠合楼板与中梁15的连接,其连接结构和方法如下:(2) As shown in Figure 10-Figure 14, the connection structure and method of the side-hanging reinforced concrete composite floor with shear key and the middle beam 15 are as follows:
(1)如图10-图11所示,中梁15在制作时,在中梁15内预埋L型连接钢筋16和箍筋17,L型连接钢筋16下端伸入箍筋17中,L型连接钢筋16的直径不小于U型连接钢筋(图1)的直径。(1) As shown in Figures 10-11, when the middle beam 15 is manufactured, the L-shaped connecting reinforcement 16 and the stirrup 17 are pre-embedded in the middle beam 15, and the lower end of the L-shaped connecting reinforcement 16 extends into the stirrup 17. The diameter of type connecting reinforcing bar 16 is not less than the diameter of U-shaped connecting reinforcing bar (Fig. 1).
(2)如图12-图13所示,将两块预制混凝土底板10吊装到中梁15两侧,两块预制混凝土底板10的侧边底部与梁外侧边缘线相接,两块预制混凝土底板10的侧悬钢筋9在同一水平位置,并且侧悬钢筋9的竖向部分与中梁15中的L型连接钢筋16的竖向部分紧密接触;将连接钢板11套入侧悬钢筋9及L型连接钢筋16,并将侧悬钢筋9与L型连接钢筋16伸入连接钢板11的部分和连接钢板11焊接在一起,或将侧悬钢筋9与L型连接钢筋16伸入连接钢板11的部分向下弯折45°,完成两块预制混凝土底板10和中梁15的钢筋连接。(2) As shown in Fig. 12-Fig. 13, two precast concrete bottom slabs 10 are hoisted to both sides of the center beam 15, the side bottoms of the two precast concrete bottom slabs 10 are connected with the outer edge line of the beam, and the two precast concrete bottom slabs The side hanging steel bars 9 of 10 are at the same horizontal position, and the vertical part of the side hanging steel bars 9 is in close contact with the vertical part of the L-shaped connecting steel bars 16 in the center beam 15; the connecting steel plates 11 are inserted into the side hanging steel bars 9 and L type connecting steel bar 16, and the side hanging steel bar 9 and the L-shaped connecting steel bar 16 stretched into the part of the connecting steel plate 11 and the connecting steel bar 11 are welded together, or the side hanging reinforcing bar 9 and the L-shaped connecting steel bar 16 are stretched into the connecting steel bar 11 The part is bent downward by 45° to complete the reinforcement connection of the two prefabricated concrete base plates 10 and the middle beam 15 .
(3)如图14所示,在上述连接的两块预制混凝土底板上浇筑混凝土现浇层14,混凝土现浇层14与预制混凝土底板10通过抗剪键5、侧悬钢筋9和反弯矩筋13连接成牢固结构。(3) As shown in Figure 14, the concrete cast-in-place layer 14 is poured on the above-mentioned two connected precast concrete floors, and the concrete cast-in-place layer 14 and the precast concrete floor 10 pass through the shear key 5, the side hanging steel bar 9 and the reverse bending moment. Ribs 13 are connected into a solid structure.
此种连接方法,同样适用于预制混凝土底板10端面和中梁15连接的情况。This connection method is also applicable to the connection between the end face of the precast concrete floor 10 and the middle beam 15 .
(三)如图15-图19所示,侧悬钢筋带抗剪键混凝土叠合楼板与边梁18的连接,其连接结构和方法如下:(3) As shown in Figure 15-Figure 19, the connection structure and method of the side-hanging reinforced concrete composite floor with shear key and side beam 18 are as follows:
(1)如图15-图16所示,边梁18在制作时,在边梁18内预埋L型连接钢筋16和箍筋17,L型连接钢筋16下端伸入箍筋17中,L型连接钢筋16的直径不小于U型连接钢筋的直径。(1) As shown in Figures 15-16, when the side beam 18 is manufactured, the L-shaped connecting reinforcement 16 and the stirrup 17 are pre-embedded in the side beam 18, and the lower end of the L-shaped connecting reinforcement 16 extends into the stirrup 17. The diameter of the type connection reinforcement 16 is not less than the diameter of the U-type connection reinforcement.
(2)如图17-图18所示,将预制混凝土底板10吊装到边梁18上,预制混凝土底板10的端部搭接到边梁18的距离大于100mm;将边梁18中的L型连接钢筋16的竖向部分与侧悬钢筋9的竖向部分紧密接触,插入到连接钢板11中并焊接在一起,或将侧悬钢筋9与L型连接钢筋16伸入连接钢板11的部分向下弯折45°,完成预制混凝土底板10与边梁的紧密连接。同时,边梁18上部与预制混凝土底板10的上部之间跨设反弯矩筋13。(2) As shown in Figures 17-18, the precast concrete floor 10 is hoisted onto the edge beam 18, and the distance between the end of the precast concrete floor 10 and the edge beam 18 is greater than 100mm; The vertical part of the connecting steel bar 16 is in close contact with the vertical part of the side hanging steel bar 9, inserted into the connecting steel plate 11 and welded together, or the side hanging steel bar 9 and the L-shaped connecting steel bar 16 are inserted into the part of the connecting steel plate 11 toward Bending down by 45° completes the tight connection between the precast concrete floor 10 and the side beams. At the same time, anti-bending moment tendons 13 are straddled between the upper part of the edge beam 18 and the upper part of the precast concrete floor 10 .
(3)如图19所示,在上述连接的预制混凝土底板上浇筑混凝土现浇层14,混凝土现浇层14与预制混凝土底板10通过抗剪键5、侧悬钢筋9和反弯矩筋13连接成牢固结构。(3) As shown in Figure 19, the cast-in-place concrete layer 14 is poured on the above-mentioned connected precast concrete floor, and the cast-in-place concrete layer 14 and the precast concrete floor 10 pass through the shear key 5, the side hanging steel bar 9 and the anti-bending moment bar 13 connected into a solid structure.
实施结果表明,本发明:①预制混凝土底板采用预留孔洞钢制支护模板,制作更环保、方便;②预制混凝土底板间通过穿插于侧悬钢筋的连接钢板连接,现场施工速度快,板底正弯矩的传力可靠,预制混凝土底板间的连接牢固;③预制混凝土底板端部与边梁采用边梁与板连接钢板连接,施工方便快捷,预制混凝土底板端部与边梁连接牢固可靠;④由于采用预制与现浇结合的方式,减少现场的湿作业量,保证结构的整体性,省去现场制作模板,节能环保,符绿色建筑的发展要求,具有很大的应用空间。The implementation results show that the present invention: ①The precast concrete floor adopts the steel support formwork with reserved holes, which is more environmentally friendly and convenient to manufacture; The force transmission of the positive bending moment is reliable, and the connection between the precast concrete floor is firm; ③The end of the precast concrete floor and the side beam are connected by the side beam and the plate connecting steel plate, which is convenient and fast for construction, and the connection between the end of the precast concrete floor and the side beam is firm and reliable; ④ Due to the combination of prefabrication and cast-in-place, it reduces the amount of wet work on site, ensures the integrity of the structure, saves the need to make formwork on site, saves energy and protects the environment, meets the development requirements of green buildings, and has a large application space.
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CN110258907A (en) * | 2019-05-15 | 2019-09-20 | 悉地(北京)国际建筑设计顾问有限公司 | A kind of prefabricated board and production method, laminated floor slab and production method |
CN110735492A (en) * | 2019-10-28 | 2020-01-31 | 浙江中清大建筑产业化有限公司 | Connecting structure of prestressed hollow composite slabs and construction method thereof |
CN110792221A (en) * | 2019-09-17 | 2020-02-14 | 巨匠建设集团股份有限公司 | Slurry leakage prevention prefabricated laminated slab and construction method thereof |
CN112240071A (en) * | 2020-11-05 | 2021-01-19 | 江苏建筑职业技术学院 | Prefabricated assembly type laminated slab and using method thereof |
CN113027020A (en) * | 2019-12-24 | 2021-06-25 | 贺州通号装配式建筑有限公司 | Prefabricated floor slab installation node and construction method thereof |
CN115387655A (en) * | 2022-08-08 | 2022-11-25 | 上海市机械施工集团有限公司 | Top plate structure of storage tank and construction method |
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CN115387655A (en) * | 2022-08-08 | 2022-11-25 | 上海市机械施工集团有限公司 | Top plate structure of storage tank and construction method |
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CN116005869A (en) * | 2023-02-27 | 2023-04-25 | 上海砼谦建筑科技有限公司 | A laminated board with quick disassembly and assembly and no leveling layer |
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