阅读说明：本技术 一种预制轨顶风道与结构板的连接结构及其施工方法 (Connecting structure of prefabricated rail top air duct and structural slab and construction method thereof ) 是由 徐军林 汪国良 朱丹 林作忠 王华兵 付先进 许俊超 胡正波 周兵 余行 张波 于 2020-04-14 设计创作，主要内容包括：本发明涉及一种预制轨顶风道与结构板的连接结构及其施工方法,该连接结构包括轨顶风道和结构板,轨顶风道包括沿风道纵向依次拼接的多个预制风道单元,各风道单元顶部均设有浇筑槽,结构板上开设有多个浇筑孔,每一浇筑孔与其中一个浇筑槽导通,各风道单元通过浇筑于各浇筑孔及各浇筑槽内的现浇混凝土固结于结构板底部。通过在风道单元的侧板顶部设置浇筑槽以及在结构板上设置浇筑孔并现浇混凝土,可实现风道单元与结构板的可靠连接,无需搭设脚手架、模板等,施工效率高,有效地节约施工时间和成本；能显著地提高轨顶风道安装结构的稳定性和可靠性；现浇混凝土能隔绝风道单元与结构板之间的空隙,提高轨顶风道的密封性。(The invention relates to a connecting structure of a prefabricated rail top air channel and a structural plate and a construction method thereof. The top of the side plate of the air duct unit is provided with the pouring groove, the structural plate is provided with the pouring hole, and concrete is poured in situ, so that the air duct unit can be reliably connected with the structural plate, a scaffold, a template and the like are not required to be erected, the construction efficiency is high, and the construction time and the cost are effectively saved; the stability and the reliability of the rail top air duct mounting structure can be obviously improved; the cast-in-place concrete can isolate the gap between the air duct unit and the structural plate, and improves the sealing property of the rail top air duct.)

1. The utility model provides a connection structure of prefabricated rail top wind channel and structural slab, includes rail top wind channel and structural slab, the rail top wind channel includes along the vertical a plurality of wind channel units of splicing in proper order in wind channel, each the wind channel unit is prefabricated structure, its characterized in that: the top of each air duct unit is provided with a pouring groove, the structural slab is provided with a plurality of pouring holes, each pouring hole is communicated with one pouring groove, and each air duct unit is fixedly connected to the bottom of the structural slab through cast-in-place concrete poured in each pouring hole and each pouring groove.

2. The connecting structure of the precast rail head duct and the structural plate according to claim 1, wherein: the structural slab is also provided with a plurality of consolidation reinforcing steel bars which protrude out of the bottom of the structural slab and extend into the pouring grooves below the structural slab.

3. The connecting structure of the precast rail head duct and the structural plate according to claim 2, wherein: the consolidation reinforcing steel bar is a U-shaped reinforcing steel bar pre-embedded in the structural slab.

4. The connecting structure of the precast rail head duct and the structural plate according to claim 1, wherein: the hole wall of the pouring hole is at least partially an inclined wall which is gradually inclined towards the inside of the hole from top to bottom.

5. The connecting structure of the precast rail head duct and the structural plate according to claim 1, wherein: each air duct unit comprises a bottom plate and at least two side plates connected with the bottom plate, and the top of each side plate is provided with the pouring groove.

6. The connecting structure of the precast rail head duct and the structural plate according to claim 5, wherein: each air duct unit is an integrated prefabricated part formed by integrally prefabricating a corresponding bottom plate and corresponding side plates.

7. The connecting structure of the precast rail head duct and the structural plate according to claim 1, wherein: the transverse section of the pouring groove comprises an upper straight groove section and a section expanding section, wherein the upper straight groove section is equal in width from top to bottom, the section expanding section is connected to the bottom end of the straight groove section, and the width of the section expanding section is gradually increased.

8. The connecting structure of the precast rail head duct and the structural plate according to any one of claims 1 to 7, wherein: the pouring grooves are through grooves which extend longitudinally along the air duct and penetrate through the front end and the rear end of the corresponding side plate, and the pouring grooves of the side plates arranged on the same side are communicated with each other.

9. The construction method of the connecting structure of the precast rail head duct and the structural slab as claimed in any one of claims 1 to 8, comprising the steps of:

prefabricating each air duct unit;

and (3) carrying out the assembly construction of each air duct unit, wherein the assembly construction of each air duct unit comprises the following steps: and after the air duct unit rises to the proper position, taking a temporary fixing measure, pouring concrete into the pouring holes reserved in the structural plates at the corresponding positions, and enabling the concrete to enter the pouring grooves of the air duct unit, so that the air duct unit and the structural plates are fixedly connected together.

10. The construction method according to claim 9, wherein: the air duct unit is lifted by the hoisting equipment on the structural plate or by the jacking equipment below the structural plate.

Technical Field

The invention belongs to the technical field of rail transit, and particularly relates to a connecting structure of a prefabricated rail top air duct and a structural plate and a construction method thereof.

Background

The rail top air duct structure at the present stage is constructed by cast-in-place reinforced concrete, the construction operation environment is poor, the working procedures are complex, the speed is low, and the construction quality is difficult to guarantee due to the influence of various factors. Meanwhile, a lot of waste building wastes are generated in the construction process, so that resources are wasted and the environment is polluted.

Specifically, the construction of the cast-in-place rail top air duct has the following problems:

(1) the rail top air duct is generally located below a subway structural slab and above a rail, is a station secondary structure, and needs to be constructed later due to factors such as shield construction and the like. During the construction of rail top wind channel later stage, the scaffold that erects the structural slab has all been demolishd, needs to set up scaffold and template again, wastes time and energy and takes money.

(2) The rail top air channel is suspended below the structural plate by means of the reserved steel bars of the structural plate, the space of the rail top air channel is small, steel bar binding, concrete pouring and the like are difficult to achieve, construction quality is difficult to guarantee, and potential quality hazards are easy to remain.

(3) The cast-in-place construction of the rail top air duct is time-consuming, labor-consuming and large in investment.

Disclosure of Invention

The invention relates to a connecting structure of a prefabricated rail top air duct and a structural plate and a construction method thereof, which can at least solve part of defects in the prior art.

The invention relates to a connecting structure of a prefabricated rail top air channel and a structural plate, which comprises the rail top air channel and the structural plate, wherein the rail top air channel comprises a plurality of air channel units which are sequentially spliced along the longitudinal direction of the air channel, each air channel unit is of a prefabricated structure, the top of each air channel unit is provided with a pouring groove, the structural plate is provided with a plurality of pouring holes, each pouring hole is communicated with one pouring groove, and each air channel unit is fixedly connected to the bottom of the structural plate through cast-in-place concrete poured in each pouring hole and each pouring groove.

In one embodiment, the structural slab is further provided with a plurality of reinforcing bars protruding from the bottom of the structural slab and extending into the casting grooves below the structural slab.

In one embodiment, the reinforcing bars are U-shaped reinforcing bars embedded in the structural slab.

In one embodiment, the wall of the casting hole is at least partially an inclined wall which is inclined gradually from top to bottom toward the inside of the hole.

In one embodiment, each air duct unit includes a bottom plate and at least two side plates connected to the bottom plate, and the top of each side plate is provided with the pouring groove.

As an embodiment, each of the air duct units is an integral prefabricated member integrally prefabricated by the corresponding bottom plate and the corresponding side plate.

In one embodiment, the transverse section of the casting groove comprises an upper straight groove section with the same width from top to bottom and a section expanding section which is connected to the bottom end of the straight groove section and has the gradually increased width.

In one embodiment, the pouring grooves are through grooves which extend longitudinally along the rails and penetrate through the front ends and the rear ends of the corresponding side plates, and the pouring grooves of the side plates arranged on the same side are communicated with each other.

The invention also relates to a construction method of the connection structure of the rail top air channel and the structural plate, which comprises the following steps:

prefabricating each air duct unit;

and (3) carrying out the assembly construction of each air duct unit, wherein the assembly construction of each air duct unit comprises the following steps: and after the air duct unit rises to the proper position, taking a temporary fixing measure, pouring concrete into the pouring holes reserved in the structural plates at the corresponding positions, and enabling the concrete to enter the pouring grooves of the air duct unit, so that the air duct unit and the structural plates are fixedly connected together.

As an embodiment, the air duct unit is lifted by a lifting device on the structural plate or by a jacking device below the structural plate.

The invention has at least the following beneficial effects:

according to the invention, the pouring groove is arranged at the top of the side plate of the air duct unit, after concrete is cast in the pouring groove from the pouring hole on the structural plate, the reliable connection between the air duct unit and the structural plate can be realized, scaffolds, templates and the like are not required to be erected, the construction is convenient, the construction speed is high, the efficiency is high, and the construction time and the cost are effectively saved. The air duct unit and the structural plate are fixedly integrated into a whole through cast-in-place concrete, so that the air duct unit and the structural plate are stressed cooperatively, and the stability and the reliability of the rail top air duct mounting structure can be obviously improved; cast-in-place concrete enters the pouring groove from the pouring hole in the structural slab, so that the gap between the air duct unit and the structural slab can be isolated, and the sealing performance of the rail top air duct is effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a connection structure of a prefabricated rail top air duct at a pouring hole and a structural slab according to an embodiment of the present invention;

FIG. 2 is a schematic view of a connection structure of a prefabricated rail top air duct at a non-casting hole and a structural slab according to an embodiment of the present invention;

fig. 3 is a schematic view of a connection structure between a structural slab and a prefabricated rail top air duct (a casting groove includes a section expansion section) provided in an embodiment of the present invention;

FIG. 4 is a side view of a connection structure of a prefabricated rail top air duct and a structural plate according to an embodiment of the present invention;

FIG. 5 is a schematic top view of a connection between a prefabricated rail top duct and a structural slab according to an embodiment of the present invention;

wherein: 1. the air duct unit comprises an air duct unit 11, side plates 12, a bottom plate 13, a pouring groove 131, a straight groove section 132, a section expanding section 2, a structural plate 21, a pouring hole 22 and a reinforcing steel bar.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.