Water seepage treatment device for prestressed pipe pile head under muddy soil
By designing a drainage system consisting of a round steel support plate, a round steel pipe, and a halved PVC pipe at the pile head of the prestressed pipe pile, the problem of seepage in open-type prestressed pipe piles is solved, achieving low-cost and efficient seepage treatment, which is suitable for silty soil and high water level environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CSCEC PERAL RIVER INT DEV CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-15
AI Technical Summary
Open-type prestressed pipe piles suffer from severe water seepage problems in coastal areas, affecting the strength and durability of the pipe piles. Furthermore, existing anti-seepage treatment methods are costly, complex to construct, and have unsatisfactory results.
A drainage system is designed using a combination of round steel plates and round steel pipes, along with halved PVC pipes and brick masonry. The system utilizes the drainage holes in the round steel pipes and the flow guidance of the halved PVC pipes, combined with a water pump to achieve automated drainage and prevent water seepage.
It effectively prevents water seepage, reduces construction costs, shortens the construction period, adapts to silty soil and high water level environments, extends the life of the equipment, and improves the safety of the project.
Smart Images
Figure CN224243928U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, specifically to a device for treating seepage at the head of underground prestressed pipe piles in silty soil. Background Technology
[0002] In today's booming socio-economic development, urbanization is accelerating, and coastal areas, as the forefront of economic development, are seeing skyscrapers springing up like mushrooms after rain. The unique geological conditions of coastal areas result in the widespread distribution of large amounts of deep silty soil. This silty soil is characterized by high water content, high compressibility, and low bearing capacity, posing significant challenges to pile foundation construction.
[0003] In the selection of pile foundation types, prestressed concrete pipe piles have become a common choice for pile foundation construction in coastal areas due to their numerous advantages. Prestressed concrete pipe piles have advantages such as high single pile bearing capacity, fast construction speed, stable quality, and relatively low cost, and can effectively adapt to the complex geological environment and engineering construction needs of coastal areas.
[0004] Among the types of prestressed concrete pipe piles, open-end prestressed concrete pipe piles and closed-end prestressed concrete pipe piles are two common forms. Closed-end prestressed concrete pipe piles, due to their closed ends, cause relatively less disturbance to the soil at the pile tip during driving, but they experience greater driving resistance, making construction more difficult and the construction period longer. Open-end prestressed concrete pipe piles, on the other hand, have open ends, allowing soil to enter the pile during driving, reducing driving resistance and making the construction process smoother. The construction period is significantly shorter than that of closed-end prestressed concrete pipe piles. Therefore, open-end prestressed concrete pipe piles are more widely used in practical engineering.
[0005] However, while open-end prestressed concrete pipe piles offer construction convenience, they also present a critical problem that urgently needs to be addressed—water seepage. Due to the open end of the pile, in coastal areas with abundant groundwater and high water levels, groundwater can easily seep into the pipe pile through the opening, leading to water seepage. Water seepage not only affects the strength and durability of the pipe pile itself but can also pose a serious threat to the safety of the overall engineering structure. For example, water accumulation inside the pipe pile may corrode the reinforcing steel, reducing its strength and bond strength, thus affecting the pile's bearing capacity. Long-term seepage can also soften the surrounding soil, causing uneven settlement of the foundation, which in turn affects the stability and safety of the superstructure.
[0006] Currently, while some methods exist for addressing seepage issues in open-type prestressed concrete pipe piles, most suffer from drawbacks such as high cost, complex construction processes, and unsatisfactory results. Some traditional seepage prevention methods require specialized materials and complex construction techniques, increasing construction costs and extending the construction period, making them unsuitable for the actual needs of engineering projects. Therefore, researching a seepage prevention method for open-type prestressed concrete pipe piles that can both meet seepage prevention requirements and reduce construction costs is of significant practical importance. Utility Model Content
[0007] This invention provides a device for treating seepage at the head of underground prestressed pipe piles in silty soil, which can solve the problem of seepage in open-type prestressed pipe piles in the prior art.
[0008] The objective of this utility model can be achieved through the following technical solutions:
[0009] A seepage treatment device for underground prestressed pipe piles in silty soil, the device being installed on a base plate where the pipe piles have been constructed but the pile core has not been poured to prevent seepage, comprising:
[0010] A round steel support plate with through holes;
[0011] A round steel pipe is inserted through the through hole, and its lower part is embedded 200mm below the round steel support plate. Drainage holes are evenly opened around the perimeter of the embedded section.
[0012] Cut a PVC pipe in half and cover it on top of the round steel pipe. Seal one end of the PVC pipe and extend the other end to the water collection well.
[0013] The protective layer is poured onto the outside of the round steel support plate and the round steel pipe, so that the top of the round steel pipe is flush with the surface of the bottom plate.
[0014] As a further embodiment of this utility model: the through hole diameter of the round steel support plate matches the outer diameter of the round steel pipe, and the two are fixedly connected by welding.
[0015] As a further embodiment of this utility model: the diameter of the round steel pipe is 100mm, the diameter of the drainage holes on the periphery of the embedded section is 10mm, and the spacing between the holes is 50mm.
[0016] As a further embodiment of this utility model: the diameter of the halved PVC pipe is 200mm, and the length is 1.2 times the distance between the water collection well and the pipe pile.
[0017] As a further embodiment of this utility model: the processing device is installed on the base plate where the pipe pile has been constructed, the pile core has been poured, and the pile head is leaking water, comprising:
[0018] The brick structure is built on top of the pipe pile head and filled with crushed stone.
[0019] A round steel pipe is inserted vertically into the brick structure, with the bottom 150mm from the top of the pile, and drainage holes are opened on the periphery of the bottom section.
[0020] Cut a PVC pipe in half and cover it on top of the round steel pipe. Seal one end of the PVC pipe and extend the other end to the water collection well.
[0021] The protective layer is poured onto the outside of the brick structure and the round steel pipe, so that the top of the round steel pipe is flush with the surface of the bottom plate.
[0022] As a further embodiment of this utility model: the height of the brick structure is 500mm, and it is constructed using lime-sand bricks.
[0023] As a further embodiment of this utility model: the diameter of the round steel pipe is 100mm, the diameter of the bottom drainage hole is 10mm, and the hole spacing is 50mm.
[0024] As a further embodiment of this utility model: the connection between the halved PVC pipe and the round steel pipe is sealed with waterproof tape.
[0025] As a further embodiment of this utility model: the protective layer is a concrete layer with a thickness of not less than 100mm.
[0026] As a further embodiment of this utility model: the water collection well is equipped with a water pump for discharging the introduced groundwater into the municipal drainage network.
[0027] The beneficial effects of this utility model are:
[0028] (1) Common materials such as round steel pipes and halved PVC pipes are used, which are inexpensive and readily available; the structural design is simplified, complex nodes are reduced, and the construction period is short. The pile core is handled differently for both uncast and cast piles, which can flexibly adapt to the needs of different engineering stages.
[0029] (2) The drainage holes evenly distributed around the perimeter of the round steel pipe can quickly collect groundwater. Cutting the PVC pipe in half expands the flow cross-section and avoids water blockage. The brick structure is filled with a layer of crushed stone to effectively filter mud and sand, prevent the drainage holes from becoming silted up, and extend the service life of the device.
[0030] (3) The round steel support plate is welded and fixed to the round steel pipe. The brick structure is constructed with lime-sand bricks to ensure the stability of the device in silty soil. The concrete protective layer is ≥100mm thick to resist external pressure and environmental erosion and extend the service life of the overall structure.
[0031] (4) The design is optimized for the geological characteristics of silty soil and can be extended to pile foundation projects in coastal areas or other high water levels and soft soil foundations. The configuration of water pumps enables automated drainage, reduces the frequency of manual maintenance, and is suitable for large-scale construction scenarios. Attached Figure Description
[0032] The present invention will be further described below with reference to the accompanying drawings.
[0033] Figure 1 This is a schematic diagram of the structure of the pipe pile of this utility model, which has been constructed but whose core has not been poured and is leaking water.
[0034] Figure 2 This is a schematic diagram of the structure of the pipe pile of this utility model, which has been constructed, the pile core has been poured, and the pile head is leaking water.
[0035] In the diagram: 10, base plate; 20, pile cap; 30, sump; 40, pipe pile; 50, pile core; 60, pile head; 70, supporting reinforcement; 1, round steel support plate; 2, round steel pipe; 4, sealing tape; 5, halved PVC pipe; 6, protective layer; 7, brick structure. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.
[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0039] Please see Figure 1As shown, this utility model is a seepage treatment device for underground prestressed pipe pile heads in silty soil. The treatment device is installed on the base plate 10 where the pipe pile 40 has been constructed but the pile core 50 has not been poured and seepage has occurred. It includes:
[0040] Round steel support plate 1, with through holes opened thereon;
[0041] A round steel pipe 2 passes through the through hole and is embedded 200mm below the round steel support plate 1 at the bottom. Drainage holes are evenly opened around the perimeter of the embedded section.
[0042] Cut a PVC pipe in half and cover the top of the round steel pipe 2. One end of the cut PVC pipe 5 is closed and the other end extends to the water collection well 30.
[0043] The protective layer 6 is poured on the outside of the round steel support plate 1 and the round steel pipe 2, so that the top of the round steel pipe 2 is flush with the bottom plate surface.
[0044] The through hole diameter of the round steel support plate 1 matches the outer diameter of the round steel pipe 2, and the two are fixedly connected by welding.
[0045] The diameter of the round steel pipe 2 is 100mm, and the diameter of the drainage holes on the periphery of the buried section is 10mm, with a hole spacing of 50mm.
[0046] The halved PVC pipe 5 has a diameter of 200mm and a length that is 1.2 times the distance between the water collection well 30 and the pipe pile 40.
[0047] A hole is drilled in the center of the round steel support plate 1 of the already constructed pipe pile 40, and a round steel pipe 2 with peripheral drainage holes is inserted, buried 200mm below the round steel support plate 1. The top of the round steel pipe 2 extends 50mm above the surface of the base plate 10, and is covered with a halved PVC pipe 5. One end is sealed with tape 4, and the other end leads the groundwater to the collection well 30. Groundwater enters the pipe through the drainage holes of the buried section of the round steel pipe 2, flows through the halved PVC pipe 5 to the collection well 30, and is finally discharged by a water pump. The welding and fixing of the round steel pipe 2 to the round steel support plate 1 enhances stability, and the covering design of the halved PVC pipe 5 expands the drainage area and prevents blockage.
[0048] Please see Figure 2 As shown, the seepage treatment device for underground prestressed pipe pile heads in silty soil of this utility model is installed on the base plate 10 where the pipe pile 40 has been constructed and the pile core 50 has been poured, and the pile head 60 is experiencing seepage. It includes:
[0049] Brick structure 7, built on top of the pipe pile head, filled with crushed stone;
[0050] 2. A round steel pipe is vertically inserted into the brick structure 7, with its bottom 150mm from the top of the pile, and drainage holes are opened on the periphery of the bottom section.
[0051] Cut a PVC pipe in half and cover the top of the round steel pipe 2. One end of the cut PVC pipe 5 is closed and the other end extends to the water collection well 30.
[0052] The protective layer 6 is poured on the outside of the brick structure 7 and the round steel pipe 2, so that the top of the round steel pipe 2 is flush with the bottom plate.
[0053] The brick structure 7 has a height of 500mm and is constructed using lime-sand bricks.
[0054] The diameter of the round steel pipe 2 is 100mm, the diameter of the bottom drainage hole is 10mm, and the hole spacing is 50mm.
[0055] The connection between the halved PVC pipe 5 and the round steel pipe 2 is sealed with waterproof tape 4 to prevent leakage.
[0056] The protective layer 6 is a concrete layer with a thickness of not less than 100mm. The protective layer 6 covers the outside of the structure to enhance durability.
[0057] The water collection well 30 is equipped with a water pump for discharging the introduced groundwater into the municipal drainage network.
[0058] The working principle of this utility model is as follows: A brick structure 7 is built on top of the pile head 60 of the pipe pile 40, filled with crushed stone, and a round steel pipe 2 with drainage holes is vertically inserted to a distance of 150mm from the pile top 60. The top is also covered with a halved PVC pipe 5 to guide water to the collection well 30. Groundwater, after being filtered of sediment by the crushed stone layer within the brick structure 7, enters the pipeline through the drainage holes at the bottom of the round steel pipe 2, and is finally discharged through the halved PVC pipe 5. The combination of the brick structure 7 and the crushed stone filters sediment, protects the drainage holes, and the precise insertion depth of the round steel pipe 2 accurately positions the drainage path.
[0059] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.
Claims
1. A device for treating seepage at the head of underground prestressed pipe piles in silty soil, characterized in that, The treatment device is installed on the base plate (10) where the pipe piles (40) have been constructed and the pile cores (50) have not been poured to prevent water seepage, and includes: A round steel support plate (1) with through holes; A round steel pipe (2) is inserted through the through hole and buried 200mm below the round steel support plate (1) at the bottom. Drainage holes are evenly opened on the periphery of the buried section. Cut a PVC pipe (5) in half and cover the top of the round steel pipe (2). One end of the cut PVC pipe (5) is closed and the other end extends to the water collection well (30). The protective layer (6) is poured on the outside of the round steel support plate (1) and the round steel pipe (2) so that the top of the round steel pipe (2) is flush with the bottom plate.
2. The device for treating seepage at the head of underground prestressed pipe piles in silty soil according to claim 1, characterized in that, The through hole diameter of the round steel plate (1) matches the outer diameter of the round steel pipe (2), and the two are fixedly connected by welding.
3. The device for treating seepage at the head of underground prestressed pipe piles in silty soil according to claim 1, characterized in that, The diameter of the round steel pipe (2) is 100mm, the diameter of the drainage holes on the periphery of the buried section is 10mm, and the hole spacing is 50mm.
4. The device for treating seepage at the head of underground prestressed pipe piles in silty soil according to claim 1, characterized in that, The halved PVC pipe (5) has a diameter of 200 mm and a length that is 1.2 times the distance between the water collection well (30) and the pipe pile (40).
5. A device for treating seepage at the head of underground prestressed pipe piles in silty soil, characterized in that, The treatment device is installed on the base plate (10) where the pipe piles (40) have been constructed, the pile cores (50) have been poured, and the pile heads (60) are leaking water. It includes: The brick structure (7) is built on the top of the pipe pile head and filled with crushed stone. A round steel pipe (2) is vertically inserted into the brick structure (7), with the bottom 150mm from the top of the pile, and drainage holes are opened on the periphery of the bottom section. Cut a PVC pipe (5) in half and cover the top of the round steel pipe (2). One end of the cut PVC pipe (5) is closed and the other end extends to the water collection well (30). The protective layer (6) is poured on the outside of the brick structure (7) and the round steel pipe (2), so that the top of the round steel pipe (2) is flush with the bottom plate.
6. The seepage treatment device for underground prestressed pipe pile heads in silty soil according to claim 5, characterized in that, The brick structure (7) is 500mm high and is constructed using lime-sand bricks.
7. A seepage treatment device for underground prestressed pipe pile heads in silty soil according to claim 5, characterized in that, The diameter of the round steel pipe (2) is 100mm, the diameter of the bottom drainage hole is 10mm, and the hole spacing is 50mm.
8. A seepage treatment device for underground prestressed pipe pile heads in silty soil according to claim 1 or 5, characterized in that, The connection between the halved PVC pipe (5) and the round steel pipe (2) is sealed with waterproof tape (4).
9. A seepage treatment device for underground prestressed pipe pile heads in silty soil according to claim 1 or 5, characterized in that, The protective layer (6) is a concrete layer with a thickness of not less than 100 mm.
10. A seepage treatment device for underground prestressed pipe pile heads in silty soil according to claim 1 or 5, characterized in that, The water collection well (30) is equipped with a water pump for discharging the introduced groundwater into the municipal drainage network.