CN219605252U - Rail top air duct post-pouring construction blanking hole plugging system - Google Patents

Abstract

The utility model provides a rail top air duct post-pouring construction blanking hole plugging system, which comprises the following components: a middle plate; the middle plate is provided with a blanking hole, a cross-shaped groove is formed in the position, located at the blanking hole, of the top of the middle plate, and an upper layer of reinforcing steel bars of the middle plate are arranged in the cross-shaped groove; a blocking member; the plugging piece comprises a plugging plate and connecting steel bars, wherein the plugging plate is arranged at the lower end of the blanking hole, and the connecting steel bars are used for connecting and fixing the upper layer steel bars of the plugging plate and the middle plate; and the concrete filling layer is used for filling the blanking hole. The utility model solves the problem that the hole bottom blocking plate is fixed when the clearance height of the rail top air channel is low and the hole bottom template support cannot be arranged, ensures the stability of the concrete blocked by the blanking hole, solves the problem of water leakage at the blocking position of the blanking hole, is convenient for site construction operation, and saves time and labor.

Description

A plugging system for blanking holes in post-casting construction of rail top air ducts

technical field

The utility model relates to the technical field of plugging holes for post-casting construction of rail top air ducts, in particular to a plugging system for post-casting construction blanking holes of rail top air ducts.

Background technique

In the post-pouring construction process of the rail top air duct of the main structure of the subway station, it is often used to pre-embed PVC pipes at a certain distance during the construction of the middle plate as the blanking hole for the concrete pouring of the rail top air duct.

In the existing construction, for the feeding hole of the rail top air duct, it is generally simply sealed with cement mortar, or the formwork support is set at the bottom of the hole and then poured; simply using cement mortar to block the air duct on the rail top will easily cause water leakage, This will affect the normal operation of the train and even cause serious accidents; and when the clearance height of the air duct on the top of the rail is too low to support the formwork support at the bottom of the hole, it is more difficult to guarantee the quality of the plugging construction of the blanking hole, which brings hidden dangers to the operation of the subway train.

Contents of the invention

Aiming at the above-mentioned prior art, the utility model proposes a plugging system for the blanking hole of the post-casting construction of the air channel on the top of the rail.

The utility model provides a plugging system for the blanking hole of the post-casting construction of the rail top air duct, which includes:

Middle plate; the middle plate has a blanking hole, and the top of the middle plate is located at the blanking hole to be provided with a cross-shaped groove, and the upper layer of the middle plate is provided in the cross-shaped groove;

Blocking piece; the blocking piece includes a blocking plate and a connecting steel bar, the blocking plate is placed at the lower end of the feeding hole, and the connecting steel bar is used to connect and fix the blocking plate and the middle plate the upper layer of reinforcement;

The concrete filling layer is used to fill the feeding hole.

Preferably, the transverse and longitudinal notches of the cross-shaped groove are respectively arranged parallel to the upper transverse and longitudinal reinforcement bars of the middle plate.

Preferably, the blocking plate is made of steel plate.

Preferably, the thickness of the blocking plate is 2-3 cm.

Preferably, the connecting reinforcement includes four Z-shaped rebars, one end of the four Z-shaped rebars is fixedly connected to the sealing plate, and the other ends of the four Z-shaped rebars are respectively placed on the In the four notches of the cross-shaped groove, and fixedly connected with the upper steel bars of the middle plate.

Preferably, a waterproof coating layer is provided between the concrete filling layer and the inner wall of the feeding hole.

Preferably, the top surface of the blocking plate is flush with the bottom surface of the middle plate.

Compared with the prior art, the utility model has the beneficial effects as follows: the utility model provides a post-casting blanking hole sealing system for the rail top air duct, which solves the problem that the hole bottom formwork support cannot be provided when the rail top air duct has a low clearance height The problem of fixing the blocking plate at the bottom of the hole ensures the stability of the concrete blocked by the feeding hole, and at the same time solves the problem of water leakage at the blocking position of the feeding hole, which is convenient for on-site construction operations and saves time and effort.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

2 and 3 are partial structural schematic diagrams of an embodiment of the utility model.

In the figure: 1. Middle plate; 2. Feed hole; 3. Blocking plate; 4. Z-shaped threaded steel bar; 5. Concrete filling layer.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

Example

A blanking hole sealing system for post-casting construction of a rail top air duct, as shown in Figure 1-3, includes a middle plate 1, which has a blanking hole 2, and the top of the middle plate 1 is located at the blanking hole 2. There is a cross-shaped groove, the depth of the cross-shaped groove is to expose the upper steel bar of the middle plate 1, the length of the cross-shaped groove is slightly longer than the length of the straight section of the Z-shaped threaded steel bar 4, the cross-shaped groove The horizontal and vertical notches of the middle plate 1 are arranged in parallel with the upper horizontal and longitudinal steel bars of the middle plate 1 respectively, so as to facilitate the reliable welding of the connecting steel bars and the upper layer of steel bars of the middle plate 1.

It also includes a blocking piece, which includes a blocking plate 3 and a connecting steel bar. The blocking plate 3 is a steel plate disc with a size slightly smaller than the blanking hole 2, with a thickness of 2-3 cm, and is reliably suspended from the bottom through the connecting steel bar. At the lower end of the material hole 2, the top surface of the plugging plate 3 is flush with the bottom surface of the middle plate 1, so as to block the bottom of the material hole 2 as the formwork support of the concrete. The connecting reinforcement includes four Z-shaped threaded steel bars 4, one end of the four Z-shaped threaded steel bars 4 is welded on both sides, and the cross is arranged on the blocking plate 3 to connect with the blocking plate 3, and the other ends are respectively placed on the sealing plate 3. In the four notches of the above-mentioned cross-shaped groove, and connected with the upper steel bar of the middle plate 1 by double-sided welding, the length of the straight section and the vertical section of the Z-shaped threaded steel bar 4 is according to the distance between the upper steel bar of the middle plate 1 The length of the slab ground (the thickness of the slab minus the thickness of the reinforced concrete protective layer on the slab surface), the size of the blanking hole and the type of steel bar are determined. The thickness of the plugging plate 3 and the specification and model of the Z-shaped threaded steel bar 4 can be adjusted according to the thickness of the middle plate 1.

Also comprise concrete filling layer 5, be used for filling blanking hole 2, be provided with waterproof coating layer between concrete filling layer 5 and the inner wall of blanking hole 2, waterproof coating layer is to break down, chisel at the PVC pipe at the blanking hole place and surrounding concrete. Hair, and after the installation and construction of the plugging plate 3 is completed, it is formed after the hole wall of the blanking hole 2 is repeatedly brushed 2-3 times with the cement-based permeable crystalline waterproof coating directly, and its thickness is uniform and without omission. The concrete filling layer 5 is a filling layer formed by pouring concrete into the hole from the top of the feeding hole 2 after the hole wall of the feeding hole 2 is painted with a waterproof coating layer. concrete, and smooth the concrete surface.

The plugging system of the utility model solves the problem of fixing the hole bottom plugging plate when the clearance height of the air duct on the top of the rail is too low to set the hole bottom formwork support, ensures the stability of the blanking hole sealing concrete, and solves the problem of the blanking hole sealing The problem of water leakage at the blocked position is convenient for on-site construction operations, saving time and effort.

The above are only embodiments of the present utility model, and are not intended to limit the scope of patents of the present utility model. All equivalent structures made using the description of the utility model and the contents of the accompanying drawings are directly or indirectly used in other related technical fields, all in the same way Within the scope of patent protection of the utility model.

Claims (7)

1. A blanking hole plugging system for post-casting construction of a rail top air duct, characterized in that it comprises: Middle plate; the middle plate has a blanking hole, and the top of the middle plate is located at the blanking hole to be provided with a cross-shaped groove, and the upper layer of the middle plate is provided in the cross-shaped groove; Blocking piece; the blocking piece includes a blocking plate and a connecting steel bar, the blocking plate is placed at the lower end of the feeding hole, and the connecting steel bar is used to connect and fix the blocking plate and the middle plate the upper layer of reinforcement; The concrete filling layer is used to fill the feeding hole. 2. The blanking hole plugging system for post-casting construction of the rail top air duct as claimed in claim 1, wherein the horizontal and vertical notches of the cross-shaped groove are respectively connected with the upper horizontal and vertical reinforcement bars of the middle plate. Parallel setting. 3. The blanking hole plugging system for post-casting construction of the rail top air duct according to claim 1 or 2, wherein the plugging plate is made of steel plate. 4. The blanking hole plugging system for post-casting construction of the rail top air duct according to claim 1 or 2, wherein the thickness of the plugging plate is 2-3 cm. 5. The blanking hole plugging system for post-casting construction of the rail top air duct as claimed in claim 1 or 2, wherein the connecting reinforcement comprises four Z-shaped threaded steel bars, and one end of the four Z-shaped threaded steel bars All are fixedly connected with the blocking plate, and the other ends of the four Z-shaped threaded steel bars are respectively placed in the four notches of the cross-shaped groove, and are fixedly connected with the upper steel bars of the middle plate. 6. The blanking hole sealing system for post-casting construction of the rail top air duct according to claim 1 or 2, wherein a waterproof coating layer is provided between the concrete filling layer and the inner wall of the blanking hole. 7. The blanking hole sealing system for post-casting construction of rail top air duct according to claim 1 or 2, characterized in that the top surface of the sealing plate is flush with the bottom surface of the middle plate.