A pre-buried basement dewatering anti-floating pressure relief simple device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CONSTR EIGHTH ENG BUREAU TECH CONSTR CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-06-26
Smart Images

Figure CN224412639U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of basement construction technology, and in particular to a simple pre-embedded basement dewatering anti-buoyancy and pressure relief device. Background Technology
[0002] With the continuous expansion of underground space development, the problems of basement dewatering and buoyancy resistance are becoming increasingly prominent. In areas with high groundwater levels, basement structures are susceptible to the buoyancy of groundwater, leading to arching of the floor slab, structural cracking, or even overall floating, which seriously threatens the safety of the project.
[0003] A search revealed Chinese patent CN215290296U, which discloses a permanent anti-buoyancy pressure relief device for basement floor slabs. The device includes a pressure relief unit located at the side of a sump and installed in the floor slab structure layer, which releases pressure by draining groundwater into the sump; and a filter unit installed in the floor slab cushion layer, penetrating the soil and connected to the lower end of the pressure relief unit. This invention, by incorporating the pressure relief unit and filter unit, achieves the purpose of detecting groundwater pressure and timely draining and releasing pressure based on the pressure reading. It has the advantages of good drainage and pressure relief effect and convenient pressure measurement. Furthermore, the device can be used in both the initial construction phase and subsequent commissioning phases, without the need for sealing, achieving a permanent use effect after a single construction, resulting in high economic benefits.
[0004] Based on the above-mentioned patent searches and existing technology findings;
[0005] The aforementioned patented retrieval device needs to penetrate the base slab structure layer and the cushion layer. The pipeline laying may damage the integrity of the base slab, forming local stress concentration points and exacerbating the risk of leakage. Furthermore, the drainage device installed in the soil layer may be saturated with drainage capacity, posing a risk of buoyancy failure. Therefore, it has certain limitations. Utility Model Content
[0006] To solve the above-mentioned technical problems, this utility model proposes a simple pre-embedded basement dewatering anti-buoyancy and pressure relief device, which realizes the functions of anti-buoyancy and pressure relief and leakage prevention.
[0007] The technical solution to achieve the purpose of this utility model is: a simple pre-embedded basement dewatering anti-buoyancy and pressure relief device, including an exterior wall and pre-embedded parts;
[0008] The embedded part includes a galvanized pipe fixedly connected to one side of the outer wall, and a first reducer is sleeved on one end of the galvanized pipe.
[0009] Preferably, the other end of the galvanized pipe penetrates the outer wall and is fixedly installed with an internally inserted floor drain, and filter material particles are fixedly installed inside the galvanized pipe.
[0010] Preferably, one end of the first reducer is fixedly connected to a second galvanized pipe, a water-stop ring is fixedly installed on the outside of the second galvanized pipe, and a second reducer is sleeved on the outside of one end of the second galvanized pipe.
[0011] Preferably, one end of the second reducer is connected to a pressure relief faucet, and a fastening nut is threaded between the pressure relief faucet and the second reducer.
[0012] Compared with existing technologies, the significant advantages of this invention are:
[0013] Firstly, this utility model uses common construction site materials such as galvanized pipes, PVC, and reducers (DN100 / DN25 galvanized pipes and PVC floor drains), eliminating the need for customized special components. Procurement is convenient and costs are controllable. The device is pre-embedded in the exterior wall and constructed simultaneously with the structure, avoiding the need for later drilling that could damage the waterproof layer, saving labor and time costs. Furthermore, the pre-embedded components prevent damage to the floor and improve waterproof performance.
[0014] Secondly, this utility model of an internal insertion floor drain uses a DN100 large-diameter galvanized pipe (approximately Φ114mm) combined with a smooth inner wall of PVC material, which significantly improves drainage efficiency and can quickly discharge sudden bursts of water. The increased volume of the floor drain further expands the water flow channel and reduces stagnation; the filter material particles (such as gravel) filter out mud and sand, preventing pipe blockage; the wide channel design of the floor drain makes it less likely to be blocked by debris.
[0015] This solution addresses the problems of existing devices requiring penetration through the base slab structure and bedding layer, the potential for pipe laying to disrupt the integrity of the base slab, the formation of localized stress concentration points that exacerbate leakage risks, and the potential for drainage devices installed within the soil layer to reach saturation and fail due to buoyancy issues. Attached Figure Description
[0016] The present invention will be further explained below with reference to the accompanying drawings and embodiments:
[0017] Figure 1 This is a three-dimensional structural schematic diagram provided by this utility model;
[0018] Figure 2 This is a cross-sectional structural schematic diagram provided by this utility model;
[0019] Figure 3 This is a schematic diagram of the embedded part structure provided by this utility model.
[0020] Explanation of reference numerals in the attached figures:
[0021] 1. Exterior wall; 2. Galvanized pipe one; 3. Internal insertion floor drain; 4. Filter material granules; 5. Galvanized pipe two; 6. Water stop ring; 7. Pressure relief faucet; 8. First reducer; 9. Fastening nut; 10. Second reducer. Detailed Implementation
[0022] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.
[0023] This utility model provides an improved, simple pre-embedded basement dewatering anti-buoyancy and pressure relief device. The technical solution of this utility model is as follows:
[0024] like Figures 1-3 As shown, a simple pre-embedded basement dewatering anti-buoyancy and pressure relief device includes an outer wall 1, which realizes the functions of anti-buoyancy and pressure relief and seepage prevention, and also includes pre-embedded parts;
[0025] The embedded parts include a galvanized pipe 2 fixedly connected to one side of the outer wall 1. One end of the galvanized pipe 2 is fitted with a first reducer 8. The materials are all commonly used on site, and the construction cost is low.
[0026] Furthermore, the other end of the galvanized pipe 2 penetrates the outer wall 1 and is fixedly installed with an internally inserted floor drain 3. Filter material particles 4 are fixedly installed inside the galvanized pipe 2. The floor drain body of the internally inserted floor drain 3 has a larger volume and a wider drainage channel, which can quickly discharge a large amount of water and reduce the risk of water accumulation.
[0027] As a further embodiment of this utility model, one end of the first reducer 8 is fixedly connected to a galvanized pipe 2 5, a water-stop ring 6 is fixedly installed on the outside of the galvanized pipe 2 5, and a second reducer 10 is sleeved on the outside of one end of the galvanized pipe 2 5. The reducer achieves efficient pipe connection and fluid control through the diameter change design.
[0028] Furthermore, a pressure relief faucet 7 is inserted into one end of the second reducer 10, and a fastening nut 9 is threaded between the pressure relief faucet 7 and the second reducer 10 to fix the faucet and maintain stable pressure relief.
[0029] The specific working method is as follows: The internal drain 3 of this device is made of PVC material and includes a DN100 galvanized pipe 2, a DN25 galvanized pipe 5, a DN100×25 first reducer 8, and a DN25×15 second reducer 10. These are assembled in sequence, with the two reducers serving as a connection. One end of the galvanized pipe 2 is inserted into the drain and filter material particles 4 are installed inside for filtration. After installation, it is pre-embedded in the basement exterior wall 1 to achieve anti-buoyancy pressure relief and anti-leakage functions. Before the basement is sealed and backfilled, the faucet only needs to be turned on to achieve the external drainage function. After the top slab is covered with soil, the faucet is removed, the plug is sealed with a threaded plug, and waterproof material is applied.
[0030] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.
Claims
1. A pre-embedded basement dewatering anti-floating pressure relief simple device, comprising an outer wall (1), characterized in that: Also includes; The embedded part includes a galvanized pipe (2) fixedly connected to one side of the outer wall (1), and a first reducer (8) is sleeved on one end of the galvanized pipe (2).
2. The pre-embedded basement dewatering anti-floating pressure relief simple device according to claim 1, characterized in that: The other end of the galvanized pipe (2) passes through the outer wall (1) and is fixedly installed with an internally inserted floor drain (3). Filter material particles (4) are fixedly installed inside the galvanized pipe (2).
3. The pre-embedded basement dewatering anti-floating pressure relief simple device according to any one of claims 1-2, characterized in that: One end of the first reducer (8) is fixedly connected to a galvanized pipe (5), a water-stop ring (6) is fixedly installed on the outside of the galvanized pipe (5), and a second reducer (10) is sleeved on the outside of one end of the galvanized pipe (5).
4. The pre-embedded basement dewatering anti-floating pressure relief simple device according to claim 3, characterized in that: One end of the second reducer (10) is connected to a pressure relief faucet (7), and a fastening nut (9) is threaded between the pressure relief faucet (7) and the second reducer (10).