A pressure relief anti-flooding device

Abstract

This utility model discloses a pressure relief and anti-buoyancy device, including a sump and a drain pipe. The drain pipe passes through the side wall of the sump, and the end of the drain pipe extending into the soil is provided with several permeable holes. A drain pump is installed inside the sump. The drain pipe is located below the cover of the sump. A main valve is installed on the drain pipe. The drain pipe is filled with a filter element, which is located on the side of the main valve near the permeable holes and is positioned corresponding to the permeable holes. A pressure regulating valve is also installed on the drain pipe, located on the side of the main valve away from the permeable holes. This utility model avoids the problem of the inverted U-shaped pipe extending out of the sump cover and encroaching on basement space in the prior art. At the same time, the replaceable filter element inside the drain pipe ensures that this utility model has a long-term stable drainage and pressure relief function, reducing the difficulty and cost of later maintenance.

Description

Technical Field

[0001] This utility model relates to a pressure relief and anti-buoyancy device, belonging to the field of basement anti-buoyancy and pressure relief drainage technology. Background Technology

[0002] Underground projects are at risk of floating due to the influence of groundwater. If the buoyancy force on the underground project exceeds its own buoyancy resistance (mainly including the weight of the underground project and its overburden, the pull-out bearing capacity of the anti-uplift piles and anti-uplift anchors), the basement floor will lose its anti-uplift stability, resulting in floating deformation, structural damage, cracking and leakage, damage to surrounding pipelines, and other defects, which seriously affect structural safety and normal use.

[0003] When the buoyancy resistance of underground engineering is insufficient, an inverted U-shaped pipe is usually installed through the pit wall in the sump of the base slab to drain and depressurize, discharging groundwater above the allowable water level (safe water level) to ensure that the buoyancy force borne by the basement floor slab does not exceed the allowable buoyancy force. This avoids lowering the perennial groundwater level, preventing excessive drainage volume and high pumping costs, and also avoids problems such as uneven ground settlement caused by a significant drop in the groundwater level. For example, Chinese utility model patent publication number CN214116666U discloses such a technical solution.

[0004] However, the inverted U-shaped pipe drainage and pressure relief scheme has the following shortcomings: 1. The inverted U-shaped pipe extends a certain height above the sump cover plate, up to the allowable water level, encroaching on the usable space above the cover plate (basement floor slab) (most underground projects are used as parking garages, and this pipe is likely to affect the effective parking space); 2. The inverted U-shaped pipe extending from the cover plate causes some damage to the integrity and aesthetics of the underground space, which is often criticized by owners; 3. The part of the inverted U-shaped pipe that connects to the basement soil is equipped with a filter layer. After long-term use, the long-term accumulation of impurities in the groundwater can easily clog the pores of the filter layer, causing the drainage and pressure relief function of the inverted U-shaped pipe to fail, and making maintenance difficult. Utility Model Content

[0005] In order to overcome the problems existing in the prior art, this utility model provides a pressure relief and anti-buoyancy device, and the specific technical solution is as follows.

[0006] A pressure relief and anti-buoyancy device includes a sump and a drain pipe, the drain pipe passing through the side wall of the sump, and a plurality of permeable holes provided at the end of the drain pipe extending into the soil; a drain pump is installed inside the sump; characterized in that:

[0007] The drain pipe is located below the cover plate of the sump; a main valve is provided on the drain pipe; a filter element is filled in the drain pipe, and the filter element is located on the side of the main valve near the water permeable hole and is arranged corresponding to the water permeable hole; a pressure regulating valve is also provided on the drain pipe, and the pressure regulating valve is located on the side of the main valve away from the water permeable hole.

[0008] Using the above technical solution, when the groundwater level rises to the safe water level line (the highest water level allowed to maintain the anti-buoyancy stability of underground engineering, with a certain safety factor reserved as required), the groundwater pressure reaches the critical pressure relief pressure of the pressure regulating valve, and the pressure regulating valve automatically opens, allowing the drainage pipe to release pressure. When the groundwater level drops to a certain height below the safe line, the groundwater pressure reaches the closing action pressure of the pressure regulating valve, and the pressure regulating valve automatically closes. The pressure relief pressure of the pressure regulating valve is adjustable to adapt to different anti-buoyancy safe water levels. This avoids the problem of the inverted U-shaped pipe extending out of the sump cover and encroaching on basement space, as seen in existing technologies. Furthermore, the replacement filter element installed inside the drainage pipe ensures that this invention has a long-term stable drainage and pressure relief function, reducing the difficulty and cost of later maintenance.

[0009] Furthermore, a flow meter is also installed on the drainage pipe. Preferably, a first alarm device is also included, which sounds an alarm when the flow rate recorded by the flow meter reaches a certain amount. The flow meter can record the groundwater discharged through the drainage pipe. When the drainage volume accumulates to a set value, the first alarm device can send an alarm to the property management department, reminding staff to replace the filter element. Replacing the filter element requires removing the main valve (removing the main valve should be done when the groundwater pressure is low), and then reinstalling the main valve after replacing the filter element.

[0010] Furthermore, an auxiliary drainage pipe is also provided on the drainage pipe, which is located between the main switch valve and the pressure regulating valve; an auxiliary valve is provided on the auxiliary drainage pipe. When the pressure regulating valve malfunctions and cannot drain water and relieve pressure, the auxiliary valve can be manually opened to drain water and relieve pressure through the auxiliary drainage pipe, thus preventing excessive groundwater pressure from damaging the basement floor structure.

[0011] Furthermore, it also includes a pressure gauge, which is installed on the drain pipe. By installing the pressure gauge, the normal operation of the pressure regulating valve can be monitored. If the water pressure detected by the pressure gauge exceeds the drainage pressure relief pressure by a certain amount, and the pressure regulating valve still fails to drain and relieve pressure, it indicates that the pressure regulating valve has malfunctioned.

[0012] Furthermore, the system also includes a pressure gauge mounted on an auxiliary pipe that passes through the side wall of the sump. One end of the auxiliary pipe connects to the soil through a permeable hole, while the other end, located inside the sump, is sealed. The side wall where the auxiliary pipe is installed is as far away from the side wall where the drain pipe is installed as possible. Compared to directly mounting the pressure gauge on the drain pipe, this system measures the steady-state groundwater pressure outside the sump, thus shielding against pressure drops caused by filter failure and pressure fluctuations during drainage, resulting in more accurate measurements.

[0013] Preferably, the system also includes a second alarm device, which issues an alarm when the pressure detected by the pressure gauge exceeds a set threshold. When the pressure detected by the pressure gauge exceeds a set value (which is higher than the pressure released by the pressure regulating valve), it indicates that the pressure regulating valve has malfunctioned. The second alarm device can then send an alarm to the property management department, reminding staff to manually operate the additional valve on the additional drain pipe to release the pressure and to promptly repair or replace the pressure regulating valve.

[0014] Furthermore, two drainage pumps are provided. These pumps are used to drain water from the sump into the external sewer system. When the water level in the sump is low, one drainage pump is activated; when the water level is high, both pumps can be activated simultaneously for rapid drainage.

[0015] Furthermore, a water level gauge is installed in the sump. Preferably, a third alarm device is also included, which issues an alarm when the water level detected by the water level gauge exceeds a set threshold. When the water level detected by the water level gauge exceeds the set value, it indicates that the drainage pump has malfunctioned, and the third alarm device can send an alarm to the property management department to remind staff to troubleshoot the problem promptly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the pressure relief and anti-buoyancy device of Embodiment 1 of this utility model;

[0017] Figure 2 This is a schematic diagram of the pressure relief and anti-buoyancy device of Embodiment 2 of this utility model.

[0018] In the diagram: 1. Sump 1.1. Side wall 1.2. Cover plate 1.2. Drain pipe 2. Soil 3. Main valve 4. Filter element 5. Pressure regulating valve 6. Flow meter 7. Additional drain pipe 8. Additional valve 9. Pressure gauge 10. Additional pipe 11. Water level gauge 12. Drain pump 13. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] Example 1

[0021] See Figure 1 A pressure relief and anti-buoyancy device includes a water collection pit 1 and a drain pipe 2. The drain pipe 2 passes through the side wall 1.1 of the water collection pit 1, and one end of the drain pipe 2 extending into the soil 3 is provided with several permeable holes (not shown). A drain pump 13 is provided in the water collection pit 1. The drain pipe 2 is located below the cover plate 1.2 of the water collection pit 1. A main switch valve 4 is provided on the drain pipe 2. The drain pipe 2 is filled with a filter element 5, which is located on the side of the main switch valve 4 near the permeable holes and is positioned corresponding to the permeable holes (the filter element 5 covers and blocks the permeable holes). A pressure regulating valve 6 is also provided on the drain pipe 2, which is located on the side of the main switch valve 4 away from the permeable holes.

[0022] Preferably, a flow meter 7 is also installed on the drain pipe 2. Preferably, a first alarm device (not shown) is also included. When the flow rate recorded by the flow meter 7 reaches a certain amount, the first alarm device sounds an alarm. The flow meter 7 can record the groundwater discharged through the drain pipe 2. When the drainage volume accumulates to a set value (the allowable filtration flow rate of the filter element), the first alarm device can send an alarm to the property management department to remind staff to replace the filter element 5. When replacing the filter element 5, the main switch valve 4 needs to be removed (removing the main switch valve 4 should be done when the groundwater pressure is low). After replacing the filter element 5, the main switch valve 4 can be reinstalled.

[0023] Furthermore, an auxiliary drainage pipe 8 is also installed on the drainage pipe 2, located between the main switch valve 4 and the pressure regulating valve 6; an auxiliary valve 9 is installed on the auxiliary drainage pipe 8. When the pressure regulating valve 6 malfunctions and cannot drain water and relieve pressure, the auxiliary valve 9 can be manually opened to drain water and relieve pressure through the auxiliary drainage pipe 8, thus preventing large groundwater pressure from damaging the basement floor structure.

[0024] Furthermore, it also includes a pressure gauge 10, which is installed on the drain pipe 2. By installing the pressure gauge 10, the normal operation of the pressure regulating valve 6 can be monitored. If the water pressure detected by the pressure gauge 10 exceeds the drainage pressure relief pressure by a certain amount, and the pressure regulating valve 6 still fails to drain and relieve pressure, it indicates that the pressure regulating valve 6 has malfunctioned.

[0025] Preferably, a second alarm device (not shown) is also included. When the pressure detected by the pressure gauge 10 exceeds a set threshold, the second alarm device issues an alarm. When the pressure detected by the pressure gauge 10 exceeds the set value (which is higher than the pressure of the pressure regulating valve 6 for draining and releasing pressure), it indicates that the pressure regulating valve 6 has malfunctioned. The second alarm device can then send an alarm to the property management department, reminding staff to manually operate the additional valve 9 of the additional drain pipe 8 to drain and release pressure, and to replace the pressure regulating valve 6 in a timely manner.

[0026] Furthermore, two drainage pumps 13 are provided. The drainage pumps 13 are used to drain the water in the sump 1 to the external sewer. When the water accumulation in the sump 1 is not large, one of the drainage pumps 13 is turned on. When the water accumulation in the sump 1 is large, both drainage pumps 13 can be turned on at the same time to achieve rapid drainage.

[0027] Furthermore, a water level gauge 12 is installed in the sump 1. Preferably, a third alarm device (not shown) is also included, which sounds an alarm when the water level detected by the water level gauge 12 exceeds a set threshold. When the water level detected by the water level gauge 12 exceeds the set value, it indicates that the drainage pump 13 has malfunctioned, and the third alarm device can send an alarm to the property management department to remind staff to troubleshoot the problem in a timely manner.

[0028] Using the above technical solution, when the groundwater level rises to the safe water level line, the groundwater pressure reaches the critical pressure relief pressure of the pressure regulating valve 6, and the pressure regulating valve 6 automatically opens, allowing the drainage pipe 2 to drain and relieve pressure. When the groundwater level drops to a certain height below the safe line, the groundwater pressure reaches the closing action pressure of the pressure regulating valve 6, and the pressure regulating valve 6 automatically closes. The pressure relief pressure of the pressure regulating valve 6 is adjustable, adapting to different anti-buoyancy safe water levels. This avoids the problem of the inverted U-shaped pipe extending out of the sump 1 cover plate 1.2 and encroaching on basement space, as seen in existing technologies. Simultaneously, the replacement filter element 5 installed inside the drainage pipe 2 ensures that this invention has a long-term stable drainage and pressure relief function, reducing the difficulty and cost of later maintenance.

[0029] Example 2

[0030] See Figure 2 The difference from the embodiment is that the pressure gauge 10 is installed in the auxiliary pipe 11 instead of the drain pipe 2, and the auxiliary pipe 11 also passes through the side wall 1.1 of the sump 1; one end of the auxiliary pipe 11 is connected to the soil 3 through a permeable hole (not shown), and the other end located inside the sump 1 is closed. The side wall 1.1 where the auxiliary pipe 11 is installed is as far apart from the side wall 1.1 where the drain pipe 2 is installed as possible. Compared with embodiment 1, the pressure gauge 10 in embodiment 2 measures the steady-state groundwater pressure outside the pit, which can shield the pressure drop caused by the failure of the filter element 5, and can also shield the pressure fluctuation caused by drainage and depressurization, making the measurement more accurate.

[0031] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention is not limited to the specific embodiments described above; these embodiments are merely illustrative and not limiting. Those skilled in the art, under the guidance of the present invention, can make many modifications without departing from the spirit and scope of the claims, and all such modifications fall within the protection scope of the present invention.

Claims

1. A pressure relief and anti-buoyancy device, comprising a sump (1) and a drain pipe (2), wherein the drain pipe (2) passes through the side wall (1.1) of the sump (1), and one end of the drain pipe (2) extending into the soil (3) is provided with a plurality of permeable holes; a drain pump (13) is provided inside the sump (1); characterized in that: The drain pipe (2) is located below the cover plate (1.2) of the water collection pit (1); a main switch valve (4) is provided on the drain pipe (2); a filter element (5) is filled in the drain pipe (2); the filter element (5) is located on the side of the main switch valve (4) close to the water permeable hole and the filter element (5) is set corresponding to the water permeable hole; a pressure regulating valve (6) is also provided on the drain pipe (2); the pressure regulating valve (6) is located on the side of the main switch valve (4) away from the water permeable hole.

2. The pressure relief and anti-buoyancy device according to claim 1, characterized in that, A flow meter (7) is also installed on the drain pipe (2).

3. The pressure relief and anti-buoyancy device according to claim 2, characterized in that, It also includes a first alarm device, which issues an alarm when the flow rate counted by the flow meter (7) reaches a certain amount.

4. The pressure relief and anti-buoyancy device according to claim 1, characterized in that, An auxiliary drain pipe (8) is also provided on the drain pipe (2), and the auxiliary drain pipe (8) is located between the main switch valve (4) and the pressure regulating valve (6); an auxiliary valve (9) is provided on the auxiliary drain pipe (8).

5. The pressure relief and anti-buoyancy device according to claim 1, characterized in that, It also includes a pressure gauge (10) which is mounted on the drain pipe (2).

6. The pressure relief and anti-buoyancy device according to claim 1, characterized in that, It also includes a pressure gauge (10) which is installed on an additional pipe (11) which also passes through the side wall (1.1) of the sump (1); one end of the additional pipe (11) is connected to the soil (3) through a permeable hole, and the other end located in the sump (1) is closed.

7. A pressure relief and anti-buoyancy device according to claim 5 or 6, characterized in that, It also includes a second alarm device, which issues an alarm when the pressure detected by the pressure gauge (10) exceeds a set threshold.

8. The pressure relief and anti-buoyancy device according to claim 1, characterized in that, Two drainage pumps (13) are provided.

9. A pressure relief and anti-buoyancy device according to claim 1, characterized in that, A water level gauge (12) is installed in the water collection pit (1).

10. A pressure relief and anti-buoyancy device according to claim 9, characterized in that, It also includes a third alarm device, which issues an alarm when the water level monitored by the water level gauge (12) exceeds a set threshold.

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