Water bag plugging structure for narrow and fat groove of fabricated subway station

Abstract

The utility model discloses a kind of water bag plugging structures for assembly type subway station narrow fat groove, including the water-filled and with narrow fat groove adaptation water bag body, with water bag body intercommunication's water injection component, with water bag body intercommunication's exhaust component and several fixed components along fat groove height direction arrangement, wherein fixed component forms at least three groups of arrangement along height direction, to realize the positioning and constraint of water bag body in fat groove section. Water bag body is customized based on fat groove actual size, length, width and height completely fit fat groove section, after water filling, can gapless fit fat groove inner wall, effectively reduce fat groove leakage rate, through the three-dimensional fixed system formed, directly constrain water bag vertical displacement, prevent the upward sliding caused by buoyancy after water filling, give consideration to plugging effect and structural safety.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated subway station construction technology, specifically to a water bag sealing structure for narrow, wide channels in prefabricated subway stations. Background Technology

[0002] In the construction of prefabricated subway stations, the quality of sealing the narrow, deep channels (especially those reaching heights of over ten meters) formed between the main structure and the enclosure structure directly affects the waterproofing performance, construction safety, and structural stability of the project. Current technologies for sealing narrow channels present the following prominent problems: Traditional methods such as backfilling with sand and gravel and pouring concrete are difficult to operate due to the narrow space of the trench. They are prone to problems such as incomplete backfilling and insufficient concrete vibration, resulting in poor sealing and easy infiltration of groundwater and silt, which affects the construction environment and structural quality. Existing sealing materials are mostly of fixed size, which cannot meet the customized needs of fertilizer tanks with a height of over ten meters, and lack flexible adjustment capabilities, making it difficult to fit tightly to the inner wall of the fertilizer tank; the installation and removal process of the sealing structure is complicated, and some materials cannot be reused, which not only increases the construction period and cost, but may also damage the surrounding structure of the fertilizer tank due to the removal operation; the lack of a reliable fixing mechanism makes the sealing structure prone to displacement due to external forces during construction, further reducing the sealing effect. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a prefabricated subway station narrow trench sealing structure with water bags.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A prefabricated subway station narrow trench sealing structure with water bag, comprising: A water-fillable water bladder body that is compatible with narrow, fat tanks; A water injection component connected to the water bladder body is used to inject water into the water bladder body and monitor the state inside the water bladder. An exhaust assembly connected to the water bladder body is used to expel air from the water bladder during the water filling process and to prevent air backflow. And several fixing components arranged along the height direction of the fertilizer tank, used to position the water bag body in the fertilizer tank and transfer the force during sealing, wherein the fixing components are arranged in at least three groups along the height direction to realize the positioning and constraint of the water bag body in the cross section of the fertilizer tank.

[0005] Furthermore, the water injection assembly includes a water injection pipe, a water injection valve, and a pressure gauge. One end of the water injection pipe is connected to the water bladder body, and the other end extends to the outside of the fertilizer tank. The water injection valve and the pressure gauge are respectively installed on the water injection pipe.

[0006] Furthermore, the exhaust assembly includes an exhaust pipe and a one-way exhaust valve. One end of the exhaust pipe is connected to the top of the water bladder body by hot-melt welding, and the other end extends to the outside of the trough. The one-way exhaust valve is installed on the exhaust pipe, and the welded part between the exhaust pipe and the water bladder body is located below the fixed component corresponding to the top plate force transmission component.

[0007] Furthermore, a flange is fixedly installed on the upper part of the water bladder body, and the flange is used to connect with the fixing frame on the top of the fertilizer tank.

[0008] Furthermore, reinforcing ribs are spaced along the height direction inside the water bladder body, and the reinforcing ribs are made of the same material as the water bladder body.

[0009] Furthermore, the end of the water injection pipe that connects to the water bladder body is fixed by hot-melt welding, and a reinforcing sleeve is provided on the welded part between the water injection pipe and the water bladder body.

[0010] This utility model has the following beneficial effects: The prefabricated subway station narrow trench waterbag sealing structure provided by this utility model: (1) The water bladder body is customized based on the actual size of the fertilizer tank. Its length, width and height are completely in line with the cross section of the fertilizer tank. After being filled with water, it can fit the inner wall of the fertilizer tank without gaps, effectively reducing the leakage rate of the fertilizer tank. At the same time, the water bladder edge is sealed by hot-melt welding and the internal spaced reinforcing rib design further prevents the water bladder from leaking at the edge or being excessively stretched and deformed due to the water pressure at a height of more than ten meters, ensuring long-term sealing performance. (2) A three-dimensional fixing system is formed by the top flange and at least three sets of fixing components. The flange is bolted to the top fixing frame of the fertilizer tank, which directly constrains the vertical displacement of the water bladder and prevents upward sliding caused by buoyancy after filling with water. The three sets of fixing components are distributed along the height of the fertilizer tank from top to middle to bottom, and are adapted to the force transmission components of the side wall and the top plate. This not only restricts the horizontal displacement of the water bladder, but also transmits the water pressure of the water bladder to the surrounding structure, avoiding local stress concentration and taking into account both the sealing effect and structural safety. (3) When the water bladder body is not filled with water, it is small in size and light in weight. It does not require large equipment for hoisting and installation. It can be positioned by simply connecting the flange bolts and the fixing components. On the other hand, the water bladder body and the water injection and air venting components can be reused. Unlike traditional sand and gravel or disposable concrete components, they can be consumed once. When dismantling, it can be recycled by simply draining the water and loosening the fixing components, thus avoiding damage to the surrounding structure of the fertilizer tank and reducing subsequent repair costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model in use. Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram showing the arrangement of the flange and the water bladder body in this utility model; Figures 1 to 3 The reference numerals in the attached drawings are respectively: 1-water bladder body, 2-flange, 3-fixing frame. Detailed Implementation

[0012] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0013] like Figures 1 to 3 As shown, a prefabricated subway station narrow trough water bag sealing structure includes a water-fillable water bag body 1 adapted to the narrow trough, a water injection component connected to the water bag body 1, an air venting component connected to the water bag body 1, and several fixing components 2 arranged along the height direction of the trough.

[0014] The water injection component is used to inject water into the water bladder body 1 and monitor the state inside the water bladder. The air venting component is used to remove air from the water bladder during the water injection process and prevent air backflow. The fixing component 2 is used to position the water bladder body 1 in the fertilizer tank and transmit the force during sealing. The fixing component 2 is arranged in at least three groups along the height direction to achieve the positioning and constraint of the water bladder body 1 in the cross section of the fertilizer tank. Preferably, the fixing component (2) consists of 3 groups, namely 2 groups of force transmission components on the side wall and 1 group of force transmission components on the top plate, forming a "top-middle-bottom" three-point fixation to ensure that the water bladder is subjected to balanced force in the height direction. Through the 3 groups of force transmission components, the displacement of the water bladder in the horizontal direction (the width direction of the fertilizer tank) is restricted, and the vertical displacement of the water bladder during the water filling and expansion process is prevented, ensuring that the water bladder is always in the preset sealing position of the fertilizer tank.

[0015] The water-filled bladder 1, through its water-filling capability, expands to perfectly match the length, width, and height of the narrow fertilizer trench, adhering to the inner wall of the trench and filling its internal space to form a physical barrier. This directly blocks groundwater and sediment from seeping into the construction area, solving the leakage problems caused by insufficient compaction of traditional gravel backfill and inadequate vibration during concrete pouring. The edges of the water-filled bladder 1 are hot-melt welded, and reinforcing ribs are spaced along the height of the bladder 1. These ribs are made of the same material as the bladder 1, further enhancing its resistance to expansion and deformation, ensuring stable shape after filling with water, and preventing gaps from forming due to water pressure from a height of tens of meters, thus maintaining the sealing effect.

[0016] The water bladder body 1 is made of flexible waterproof fabric, which is a PVC mesh fabric. This material has excellent waterproofness, tear resistance, and weather resistance, and is available in two thicknesses: 0.9mm and 1.2mm. The 0.9mm thickness is suitable for conditions with lower pressure on the side walls of the fertilizer tank, while the 1.2mm thickness is suitable for conditions with higher pressure at the bottom of the fertilizer tank at heights of several meters. The two thicknesses can be selected or combined according to the stress requirements of different height sections of the fertilizer tank.

[0017] A flange 3 is fixedly installed on the upper part of the water bladder body 1. The flange 3 is used to connect with the fixing frame 4 on the top of the fertilizer tank by bolts, which can provide downward forced constraint, directly restricting the upward sliding or displacement of the water bladder, avoiding the overall misalignment of the water bladder due to the lack of top fixing (such as the top detaching from the fertilizer tank or the bottom pressing against the side wall), ensuring that the water bladder is always in the preset sealing section of the fertilizer tank, and adapting to the vertical fixing requirements of high-height fertilizer tanks. After the flange 3 is tightened by bolts, it will press the upper edge of the water bladder body 1 between the fixing frame 4 on the top of the fertilizer tank and the water bladder, forming a rigid sealing surface. On the one hand, it eliminates the gap between the top of the water bladder and the fixing frame 4, and on the other hand, it forces the upper part of the water bladder to press against the side wall of the fertilizer tank, strengthening the fit and sealing of the top area, avoiding leakage caused by air or gaps at the top, and covering the top sealing blind area of ​​the high fertilizer tank.

[0018] In this embodiment, the water injection assembly includes a water injection pipe, a water injection valve, and a pressure gauge. The water injection pipe is made of PVC pipe, with one end connected to the bottom of the water bladder body 1 via heat fusion welding. A reinforcing sleeve is fitted over the welded joint between the water injection pipe and the water bladder body 1 to prevent the interface from breaking due to water pressure. The other end extends to the outside of the fertilizer tank and connects to an external water supply device. The water injection valve and the pressure gauge are respectively installed on the water injection pipe. The water injection valve is a ball valve, located in the middle of the water injection pipe, used to control the start and stop of water injection. The pressure gauge (range 0-1.0MPa, accuracy ±0.01MPa) is installed on the water injection pipe between the water injection valve and the water bladder body 1 to monitor the water pressure inside the water bladder in real time.

[0019] When performing water injection, for the water bladder body 1 at a height of over ten meters, the water pressure needs to be increased in stages. In the initial stage (0-5 meters high), the water pressure is controlled at 0.2-0.3 MPa; in the middle stage (5-10 meters high), the water pressure is controlled at 0.4-0.5 MPa; and in the final stage (over ten meters high), the water pressure is controlled at 0.6-0.7 MPa. The water injection speed is adjusted in real time by reading the pressure gauge to avoid sudden increases in water pressure that could cause the water bladder to rupture, and to ensure that the water bladder expands evenly.

[0020] In this embodiment, the exhaust assembly includes an exhaust pipe and a one-way exhaust valve. The exhaust pipe is made of PVC pipe and the exhaust valve is a one-way valve to prevent external air from flowing back in. One end of the exhaust pipe is connected to the top of the water bladder body 1 by hot-melt welding, and the other end extends to the outside of the trough. The one-way exhaust valve is set on the exhaust pipe. The welding part between the exhaust pipe and the water bladder body 1 is located below the fixing component 2 corresponding to the top plate force transmission component.

[0021] During the water filling process, open the vent valve to allow the air inside the water bladder body 1 to be expelled through the vent pipe until water flows out of the vent pipe (indicating that the air inside the water bladder body 1 has been completely expelled). Then close the vent valve to ensure that there is no air residue inside the water bladder body 1, thus avoiding the water bladder body 1 from not fitting tightly in certain areas due to air compression, which would affect the sealing effect.

[0022] The specific process for using this solution is as follows: (1) The water bladder body 1 is hoisted into the tank. The pre-treated water bladder body 1 (in its unfilled state, small in size and easy to operate) is hoisted into the narrow fertilizer tank, which is more than ten meters high, using hoisting equipment. The position of the water bladder is adjusted so that its axis is aligned with the center of the fertilizer tank section, so as to avoid the water bladder sticking to the side wall of the fertilizer tank, which would make subsequent filling with water difficult.

[0023] (2) Top flange 3 fixed First, align the flange 3 on the upper part of the water bladder with the fixing bracket 4 on the top of the fertilizer tank, insert the bolts and tighten them. Through the rigid connection of the flange 3, a vertical constraint is directly formed on the top of the water bladder to prevent the water bladder from shifting upward due to buoyancy after subsequent filling with water.

[0024] (3) Installation of “upper-middle-lower” fixed component 2 Along the height of the trough, connect the three sets of fixing components 2 to the preset force transmission components respectively: (4) Confirm that the outer end of the water injection pipe of the water injection component is sealed to the external water supply equipment (high pressure water pump), the end of the exhaust pipe of the exhaust component is unobstructed, and all fixed components 2 are not loose.

[0025] (5) Staged water filling and air venting Initial stage (water bladder filling height 0-5 meters): Open the water injection valve and one-way air release valve, start the water supply equipment and slowly inject water; monitor the water pressure in real time with a pressure gauge and control the water pressure at 0.2-0.3MPa to avoid sudden water pressure rise that could cause the bottom of the water bladder to rupture; during the water injection process, the air inside the water bladder is discharged through the air release pipe until water flows out of the air release pipe.

[0026] Intermediate stage (5-10 meters of water filling): Adjust the power of the water supply equipment to increase the water pressure to 0.4-0.5MPa and continue filling with water; during this stage, the middle of the water bladder expands, and the horizontal displacement is restricted by the side wall fixing component 2 to ensure that the water bladder fits against the inner wall of the side wall. At the same time, the exhaust pipe continuously exhausts air to eliminate the air trapped in the middle.

[0027] Final stage (filling height 10 to over ten meters): Further increase the water pressure to 0.6-0.7 MPa until the water bladder fills the cross section of the fertilizer tank; after observing that the pressure gauge reading is stable, close the one-way vent valve (to prevent external air from flowing back in), and then close the water injection valve to complete the filling.

[0028] At this time, the water bladder completely adheres to the inner wall of the fertilizer tank under water pressure, forming a gapless physical sealing barrier. The flange 3 and the fixing component 2 together restrict the displacement of the water bladder, and the pressure gauge monitors the water pressure status in real time.

[0029] (6) Maintaining the blockade status: During periods requiring trench sealing (such as maintenance of the station's main structure and waterproofing construction), each component continues to function effectively: Fixing component 2: Through the "top-middle-bottom" three-point constraint, the water bag is prevented from shifting due to external construction collisions or groundwater pressure fluctuations; Water injection component: Regularly observe the pressure gauge reading. If the water pressure drops due to minor leakage, open the water injection valve to add water to the preset pressure and maintain the sealing effect. Exhaust assembly: The one-way exhaust valve is always closed to prevent external air from entering the water bladder and causing localized contraction, thus ensuring a tight seal.

[0030] (7) Water bag removal and reuse Once the fertilizer tank sealing task is complete, remove it according to the following steps: Open the water inlet valve to release the water from the water bladder. After the water has been completely drained, close the water inlet valve. Remove the fixing components 2 in sequence: first loosen the adjusting buckle of the fixing component 2 in the lower middle part of the side wall and remove the hook; then loosen the fixing component 2 of the top plate, and finally unscrew the connecting bolts between the flange 3 and the top fixing bracket 4; The retracted water bladder body 1 was lifted out of the fertilizer tank using hoisting equipment. After cleaning the surface mud and sand, the integrity of the water bladder body 1 and the water injection / venting assembly was checked. The intact components can be stored and reused for subsequent sealing operations in similar narrow and sludge-filled trenches.

[0031] Additionally, it should be noted that components not described in detail in this article are existing technologies.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A prefabricated subway station narrow, wide trench sealing structure using water bags, characterized in that, include: A water-fillable water bladder body that is compatible with narrow fat tanks (1). A water injection assembly connected to the water bladder body (1) is used to inject water into the water bladder body (1) and monitor the state inside the water bladder; An exhaust assembly connected to the water bladder body (1) is used to remove air from the water bladder during the water injection process and prevent air backflow. And a number of fixing components (2) arranged along the height direction of the fertilizer tank, used to position the water bag body (1) in the fertilizer tank and transmit the force during the sealing, wherein the fixing components (2) are arranged in at least three groups along the height direction to realize the positioning and constraint of the water bag body (1) in the cross section of the fertilizer tank.

2. The prefabricated subway station narrow, wide-gauge channel water-bag sealing structure according to claim 1, characterized in that, The water injection assembly includes a water injection pipe, a water injection valve, and a pressure gauge. One end of the water injection pipe is connected to the water bladder body (1), and the other end extends to the outside of the fertilizer tank. The water injection valve and the pressure gauge are respectively installed on the water injection pipe.

3. The prefabricated subway station narrow, wide-slot water-filled sealing structure according to claim 2, characterized in that, One end of the water injection pipe that is connected to the water bladder body (1) is fixed by hot melt welding, and a reinforcing sleeve is provided on the welded part of the water injection pipe and the water bladder body (1).

4. The prefabricated subway station narrow, wide-gauge channel water-bag sealing structure according to claim 1, characterized in that, The exhaust assembly includes an exhaust pipe and a one-way exhaust valve. One end of the exhaust pipe is connected to the top of the water bladder body (1) by hot-melt welding, and the other end extends to the outside of the fat tank. The one-way exhaust valve is set on the exhaust pipe. The welding part of the exhaust pipe and the water bladder body (1) is located below the fixing component (2) corresponding to the top plate force transmission component.

5. The prefabricated subway station narrow, wide-gauge channel water-bag sealing structure according to claim 1, characterized in that, A flange (3) is fixedly installed on the upper part of the water bladder body (1), and the flange (3) is used to connect with the fixing frame (4) on the top of the fertilizer tank.

6. The prefabricated subway station narrow, wide-gauge channel water-bag sealing structure according to claim 1, characterized in that, The water bladder body (1) is provided with reinforcing ribs at intervals along the height direction inside, and the reinforcing ribs are made of the same material as the water bladder body (1).

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