Easily-disassembled drain hole structure with reverse filtering function

Abstract

The utility model provides an easily dismantled drain hole structure with a reverse filter function, which comprises a pre-buried sleeve, a drain pipe and a reverse filter layer, the drain pipe is arranged in the pre-buried sleeve in a penetrating manner, a first annular plate and a pre-buried anchoring part are respectively arranged at two ends of the pre-buried sleeve, and the reverse filter layer is arranged in the pre-buried sleeve. The first annular plate can block a wall gap between the water drainage pipe and the embedded sleeve, a second annular plate is arranged at one end of the water drainage pipe, and the second annular plate is detachably connected with the embedded anchoring part; and the inverted filter layer is detachably arranged in the water drain pipe. The inverted filter layer can reduce loss of solid-phase components of the backfill soil, and the structural safety and the service life of the backfill soil and a building above the backfill soil are guaranteed; in addition, the drain pipe and the inverted filter in the drain hole structure can be detached, overhauled and replaced at any time, compared with the prior art, the efficiency of replacement operation is improved in magnitude, and the time cost and the capital cost of construction, overhaul and maintenance are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of construction technology of drainage holes in retaining walls, and in particular to a drainage hole structure with reverse filtration function that is easy to disassemble. Background Technology

[0002] Retaining walls are an important civil engineering structure widely used in various construction projects. With their unique structure and function, they provide effective solutions for slope stability, water flow control, space utilization, engineering protection, and landscape construction. However, during the actual construction and use of retaining walls, the water content in the soil layer behind the wall has a significant impact on the wall's service life and safety. To drain moisture from the soil behind the wall, prevent surface water infiltration, reduce soil softening, lower water pressure and frost heave, and ensure structural safety, a drainage system should be installed for the retaining wall.

[0003] Currently, the drainage system of retaining walls generally adopts a combination of drainage holes and walls, and a filter layer behind the wall. However, there are still some problems in the actual construction of this drainage system at present. Among them, the most common problems are the setting and effectiveness of the filter layer.

[0004] The filter layer, a crucial component of the retaining wall drainage system, prevents water flow from carrying away fine soil particles, thus avoiding soil erosion and ensuring the safety of the soil structure. Currently, the main practice for constructing the filter layer is to backfill it simultaneously with the backfill soil behind the wall. However, in actual construction, the fabrication and backfilling of the filter layer are greatly affected by external factors: ① Different construction teams produce filter layers of varying quality, sometimes even resorting to shoddy workmanship; ② Backfilling is often done mechanically, making simultaneous construction of the filter layer and backfill soil slow and failing to fully utilize the speed advantage of mechanical construction; ③ The position and thickness of the filter layer are often difficult to control precisely during construction, and the mechanical backfilling process may also damage the constructed filter layer; ④ Subsequent settlement of the retaining wall can cause the filter layer to shift or even fail.

[0005] Therefore, it is difficult to control the construction quality of the filter layer during actual construction. Moreover, the quality problems of the filter layer usually only gradually appear during the long period of use after the project is completed. It is difficult to find them during construction. Once the filter layer fails, a large number of soil particles will be lost with the water as it is discharged from the drainage hole during subsequent use. This seriously affects the safety of the soil structure behind the retaining wall and the safety of the buildings on the backfill soil behind the retaining wall. Furthermore, the resulting drainage hole blockage will also incur more cleaning costs.

[0006] Therefore, the actual construction quality of the filter layer has a difficult impact on the project quality and service life. Once a problem is found and it is determined that the filter layer needs to be reworked, the rework operation is very time-consuming and labor-intensive. It is necessary to excavate the backfill soil, reinstall the filter layer, and then backfill the soil layer. Especially if there are buildings or other structures on the backfill soil behind the retaining wall, the rework cost is extremely high. In many cases, it is even impossible to reconstruct the filter layer, resulting in serious quality accidents such as the buildings on the backfill soil becoming unusable and the retaining wall collapsing. Utility Model Content

[0007] The purpose of this invention is to provide an easily detachable drain hole structure with reverse filtration function to solve the problems mentioned above.

[0008] The technical solution adopted by this utility model is: an easily detachable drain hole structure with reverse filtration function, which includes a pre-embedded sleeve, a drain pipe and a reverse filter layer. The drain pipe is inserted into the pre-embedded sleeve. The two ends of the pre-embedded sleeve are respectively provided with a first ring plate and a pre-embedded anchor. The first ring plate can seal the gap between the drain pipe and the wall of the pre-embedded sleeve. One end of the drain pipe is provided with a second ring plate. The second ring plate and the pre-embedded anchor are detachably connected. The reverse filter layer is detachably constructed in the drain pipe.

[0009] Furthermore, the inner wall of the pre-embedded sleeve is provided with a snap-fit ​​strip, which extends along the axial direction of the pre-embedded sleeve, and the outer wall of the drain pipe is provided with a snap-fit ​​groove that extends in the same direction as the snap-fit ​​strip and is adapted in shape.

[0010] Furthermore, the drain pipe is provided with a drain chamber and a filter chamber distributed along its axial direction. The side wall of the drain pipe is provided with a detachable filter chamber cover. The filter chamber cover corresponds to the position of the filter chamber. The drain chamber and the filter chamber are isolated by a filter screen. The filter layer is located in the filter chamber.

[0011] Furthermore, the filter layer includes a filter geotextile and a filter material, with the filter material located within the filter geotextile.

[0012] Furthermore, the pre-embedded anchor includes a connecting block and an anchor rod. The connecting block has a connecting hole, and the two ends of the connecting hole have a first connecting surface and a second connecting surface, respectively. The second ring plate and the second connecting surface are located on both sides of the first connecting surface. The first connecting surface is parallel to the second ring plate, and the second connecting surface forms an acute angle with the second ring plate. The anchor rod is located on the second connecting surface and extends along the axial direction of the connecting hole.

[0013] Furthermore, the outer diameter of the drain pipe is less than the inner diameter of the connecting hole and less than the outer diameter of the second ring plate.

[0014] Furthermore, the first connecting surface is provided with an internal threaded hole, and a high-strength bolt passes through the second ring plate and connects to the internal threaded hole.

[0015] Furthermore, the internal threaded hole is a blind hole or a through hole, and its position corresponds to the anchor rod, with an internal threaded groove provided at the end of the anchor rod facing the internal threaded hole.

[0016] The beneficial effects of this utility model are as follows: the drainage pipe and the pre-embedded sleeve are separate and easily detachable structures, as are the filter layer and the drainage pipe. The filter layer can separate water and sand (or soil) flowing from the backfill. The water is discharged by the drainage pipe, while the sand (or soil) remains on the side of the filter layer near the backfill, reducing the loss of solid components in the backfill and ensuring the structural safety and service life of the backfill and the building above it. The pre-embedded sleeve can protect the drainage pipe when the retaining wall settles. The settlement of the retaining wall does not affect the normal function of this drainage hole structure. Furthermore, the drainage pipe and the filter layer in this drainage hole structure can be disassembled, inspected, and replaced at any time. Compared with the existing technology of excavating backfill, rebuilding the filter layer, and backfilling again, the efficiency of the replacement operation is improved by an order of magnitude, greatly reducing the time and financial costs of construction, inspection, and maintenance. Attached Figure Description

[0017] Figure 1 This is a front view of an embodiment of the present invention in use.

[0018] Figure 2 This is a front view structural diagram of an embodiment of the present utility model;

[0019] Figure 3 These are the left and front views of the pre-embedded anchors in this embodiment of the utility model;

[0020] Figure 4 This is a front sectional view of the drain pipe in an embodiment of this utility model;

[0021] Figure 5 This is a right view of the drain pipe in an embodiment of this utility model;

[0022] Figure 6 This is a left view of the pre-embedded sleeve in an embodiment of this utility model.

[0023] In the picture:

[0024] 1. Pre-embedded sleeve;

[0025] 2. Drain pipe; 2-1. Drain chamber; 2-2. Filter chamber;

[0026] 3. Filter layer; 3-1. Filter geotextile; 3-2. Filter material;

[0027] 4. First ring plate;

[0028] 5. Pre-embedded anchor; 5-1. Connecting block; 5-2. Connecting hole; 5-3. Anchor rod; 5-4. First connecting surface; 5-5. Second connecting surface; 5-6. Internal threaded hole;

[0029] 6. Second ring plate; 6-1. Positioning holes;

[0030] 7. Connecting strip;

[0031] 8. Snap-on slot;

[0032] 9. Filter compartment cover;

[0033] 10. Filter screen;

[0034] 11. High-strength bolts;

[0035] 12. Retaining wall;

[0036] 13. Backfill soil. Detailed Implementation

[0037] The technical solutions of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0038] In the description of the embodiments of this utility model, it should be understood that the terms "top," "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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 be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, it should be noted that unless otherwise expressly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model through specific circumstances.

[0039] Reference Appendix Figure 1-6This embodiment provides an easily detachable drainage hole structure with a reverse filtration function, which includes a pre-embedded sleeve 1, a drainage pipe 2, and a reverse filter layer 3. The pre-embedded sleeve 1 is pre-embedded in a retaining wall 12, with its two ends connected to both sides of the retaining wall 12. A first ring plate 4 is provided at the end of the sleeve closer to the backfill soil 13, and a pre-embedded anchor 5 is provided at the end away from the backfill soil 13. The drainage pipe 2 passes through the pre-embedded sleeve 1. The first ring plate 4 is used to seal the gap between the drainage pipe 2 and the pre-embedded sleeve 1 to prevent water and soil in the backfill soil 13 from entering the gap between the drainage pipe 2 and the pre-embedded sleeve 1. A second ring plate 6 is provided at the end of the drainage pipe 2 away from the backfill soil 13. The second ring plate 6 is detachably connected to the pre-embedded anchor 5. The function of the pre-embedded anchor 5 includes: improving the connection stability between the pre-embedded sleeve 1 and the retaining wall 12, and connecting and fixing the second ring plate 6 and the drainage pipe 2. The reverse filter layer 3 is detachably constructed in the drainage pipe 2.

[0040] Using the above technical solution, the pre-embedded sleeve 1 and pre-embedded anchor 5 are firmly installed during the construction of the retaining wall 12. The drainage pipe 2 and the filter layer 3 can be installed in the pre-embedded sleeve 1 at appropriate nodes according to actual needs. The filter layer 3 can separate the water and sand (or soil) flowing from the backfill 13. The water is discharged by the drainage pipe 2, while the sand (or soil) remains outside the filter layer 3 on the side close to the backfill 13, reducing the loss of solid components in the backfill 13 and ensuring the structural safety and service life of the backfill 13 and the building above it. Furthermore, the pre-embedded sleeve 1 can settle together with the retaining wall 12. The settlement of the retaining wall 12 does not affect the normal use function of this drainage hole structure. Moreover, the drainage pipe 2 and the filter layer 3 in this drainage hole structure can be disassembled, inspected, and replaced at any time. Compared with the existing technology of excavating and backfilling soil 13-rebuilding the filter layer 3-backfilling soil 13 again, the efficiency of the replacement operation is improved by an order of magnitude, which greatly reduces the time and financial costs of construction, inspection and maintenance.

[0041] The aforementioned filter layer 3 can be constructed using filter geotextile 3-1 and filter material 3-2. The filter geotextile 3-1 is simply wrapped around the filter material 3-2. The filter material 3-2 can be selected according to actual construction needs. For example, solid materials of different particle sizes in conventional filter layer 3 can be used alone or in combination as the filter material 3-2 in this embodiment. The cost is low and it can be prefabricated in the factory.

[0042] To improve the connection stability between the pre-embedded sleeve 1 and the drain pipe 2 and prevent rotational displacement, this embodiment provides a snap-fit ​​strip 7 on the inner wall of the pre-embedded sleeve 1. The snap-fit ​​strip 7 extends axially along the pre-embedded sleeve 1, and the outer wall of the drain pipe 2 is provided with a snap-fit ​​groove 8 that extends in the same direction as the snap-fit ​​strip 7 and is shaped to fit the groove. When installing the drain pipe 2, the end of the drain pipe 2 without the second ring plate 6 is inserted through the end of the pre-embedded sleeve 1 with the pre-embedded anchor 5 and pressed against the first ring plate 4. Then, the second ring plate 6 is connected and tightened to the pre-embedded anchor 5. The operation is simple and quick, and the installation is stable.

[0043] The aforementioned snap-fit ​​strips 7 can be arranged in several around the circumference of the pre-embedded sleeve 1. Correspondingly, snap-fit ​​grooves 8 can also be arranged in several around the circumference of the drain pipe 2, and their positions correspond to those of the snap-fit ​​strips 7.

[0044] To meet the installation requirements of the drain pipe 2, this embodiment provides a connecting block 5-1 in the pre-embedded anchor 5, and a connecting hole 5-2 in the connecting block 5-1. One end of the connecting hole 5-2 is connected to the pre-embedded sleeve 1. The outer diameter of the drain pipe 2 is less than the inner diameter of the connecting hole 5-2 and less than the outer diameter of the second ring plate 6, so as to ensure that the drain pipe 2 can be installed into the pre-embedded sleeve 1, and the second ring plate 6 can block the wall gap between the pre-embedded sleeve 1 and the connecting hole 5-2.

[0045] In this embodiment, the drain pipe 2 is provided with a drain chamber 2-1 and a filter chamber 2-2 distributed along its axial direction. The filter chamber 2-2 is located close to the backfill soil 13, while the drain chamber 2-1 can be located on either side of it or on the side away from the backfill soil 13. A removable filter chamber cover 9 is provided on the side wall of the drain pipe 2, and the filter chamber cover 9 corresponds to the position of the filter chamber 2-2. The drain chamber 2-1 and the filter chamber 2-2 are separated by a filter screen 10, and the filter layer 3 is located in the filter chamber 2-2. Since the retaining wall 12 has a certain thickness, the drain pipe 2 has a certain length, making it difficult to insert or remove the filter layer 3 from the end of the drain pipe 2. Therefore, opening a hole in the side wall of the drain pipe 2 and providing the filter chamber cover 9 facilitates the disassembly and replacement of the filter layer 3, improving the efficiency of construction, maintenance, and replacement.

[0046] The filter chamber cover 9 is configured as an arc-shaped plate, forming a continuous pipe wall with the side wall of the filter chamber 2-2, identical to other parts of the drain pipe 2. The drain pipe 2 arms on both sides of the filter chamber cover 9 can limit the filter chamber cover 9, allowing it to move and be removed only radially along the drain pipe 2, and preventing it from sliding axially, thus ensuring the structural functionality. A groove structure, continuous with the locking groove 8 on the wall of the drain pipe 2, can also be provided on the outer wall of the arc-shaped plate to improve the positioning effect.

[0047] In addition, the pre-embedded anchor 5 is also provided with an anchor rod 5-3. The connecting block 5-1 is provided with a first connecting surface 5-4 and a second connecting surface 5-5 at the two ends of the axial direction of the connecting hole 5-2. The second ring plate 6 and the second connecting surface 5-5 are respectively located on both sides of the first connecting surface 5-4. The first connecting surface 5-4 is parallel to the second ring plate 6, and the second connecting surface 5-5 forms an acute angle with the second ring plate 6. The anchor rod 5-3 is located on the second connecting surface 5-5 and extends along the axial direction of the connecting hole 5-2. In this embodiment, the drainage hole structure is designed such that both the embedded sleeve 1 and the drainage pipe 2 are inclined, with the higher part closer to the backfill soil 13 and the lower part farther away from the backfill soil 13 to improve drainage efficiency. The first connecting surface 5-4 is used to fit the second ring plate 6, ensuring the stability and tightness of the connection between the embedded anchor 5 and the drainage pipe 2. The anchor rod 5-3 is anchored in the retaining wall 12 to connect the embedded anchor 5 and the retaining wall 12. The second connecting surface 5-5 is used to fit the wall surface of the retaining wall 12, ensuring the stability and tightness of the connection between the embedded anchor 5 and the retaining wall 12. In practice, the second connecting surface 5-5 can also be welded to the embedded sleeve 1 to further improve connection stability and service life.

[0048] The first connecting surface 5-4 is provided with an internal threaded hole 5-6, and the second ring plate 6 is provided with a positioning hole 6-1 (which can be a smooth hole or a screw hole). A high-strength bolt 11 is inserted through the positioning hole 6-1 on the second ring plate 6 and then installed in the internal threaded hole 5-6 on the first connecting surface 5-4 to securely connect the pre-embedded anchor 5 and the drain pipe 2.

[0049] In the above technical solution, the internal threaded hole 5-6 can be a blind hole or a through hole. When it is a through hole, its position corresponds to the anchor rod 5-3. The end of the anchor rod 5-3 facing the internal threaded hole 5-6 is provided with an internal threaded groove (not shown in the figure), so that the high-strength bolt 11 passes through the internal threaded hole 5-6 and connects with the anchor rod 5-3, further improving the tightness of the connection and service life of this drainage hole structure.

[0050] Of course, the high-strength bolt 11 can also be replaced by a combination of a screw and a nut, wherein one end of the screw is welded to the first connecting surface 5-4, and the other end passes through the positioning hole 6-1 on the second ring plate 6 and is connected to the nut. This eliminates the need for the internal thread hole 5-6, making its manufacturing process simpler.

[0051] Compared with the prior art, the beneficial effects of this utility model are as follows: the drain pipe 2 and the pre-embedded sleeve 1 are separate and easy-to-disassemble structures, and the filter layer 3 and the drain pipe 2 are also separate and easy-to-disassemble structures. The filter layer 3 can separate the water and sand (or soil) flowing from the backfill soil 13. The water is discharged by the drain pipe 2, while the sand (or soil) remains on the side of the filter layer 3 close to the backfill soil 13, reducing the loss of solid components in the backfill soil 13 and ensuring the structural safety and service life of the backfill soil 13 and the building above it. The pre-embedded sleeve 1 can protect the drain pipe when the retaining wall 12 settles. The settlement of the retaining wall 12 does not affect the normal use function of this drain hole structure. Furthermore, the drain pipe 2 and the filter layer 3 in this drain hole structure can be disassembled, inspected, and replaced at any time. Compared with the prior art of excavating the backfill soil 13, rebuilding the filter layer 3, and backfilling the soil 13 again, the efficiency of the replacement operation is improved by an order of magnitude, greatly reducing the time and financial costs of construction, inspection, and maintenance.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0053] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A detachable drainage hole structure with reverse filtration function, characterized in that, The device includes a pre-embedded sleeve, a drain pipe, and a filter layer. The drain pipe is inserted into the pre-embedded sleeve. The pre-embedded sleeve has a first ring plate and a pre-embedded anchor at both ends. The first ring plate can seal the gap between the drain pipe and the wall of the pre-embedded sleeve. One end of the drain pipe has a second ring plate, which is detachably connected to the pre-embedded anchor. The filter layer is detachably constructed in the drain pipe.

2. The easily detachable drainage hole structure with reverse filtration function according to claim 1, characterized in that, The inner wall of the pre-embedded sleeve is provided with a snap-fit ​​strip, which extends along the axial direction of the pre-embedded sleeve. The outer wall of the drain pipe is provided with a snap-fit ​​groove that extends in the same direction as the snap-fit ​​strip and is adapted in shape.

3. The easily detachable drainage hole structure with reverse filtration function according to claim 2, characterized in that, The drain pipe is provided with a drain chamber and a filter chamber distributed along its axial direction. The side wall of the drain pipe is provided with a detachable filter chamber cover. The filter chamber cover is positioned corresponding to the filter chamber. The drain chamber and the filter chamber are isolated by a filter screen. The filter layer is located in the filter chamber.

4. The easily detachable drainage hole structure with reverse filtration function according to any one of claims 1-3, characterized in that, The filter layer includes a filter geotextile and a filter material, with the filter material located inside the filter geotextile.

5. The easily detachable drainage hole structure with reverse filtration function according to claim 4, characterized in that, The pre-embedded anchor includes a connecting block and an anchor rod. The connecting block has a connecting hole, and the two ends of the connecting hole have a first connecting surface and a second connecting surface, respectively. The second ring plate and the second connecting surface are located on both sides of the first connecting surface. The first connecting surface is parallel to the second ring plate, and the second connecting surface forms an acute angle with the second ring plate. The anchor rod is located on the second connecting surface and extends along the axial direction of the connecting hole.

6. The easily detachable drainage hole structure with reverse filtration function according to claim 5, characterized in that, The outer diameter of the drain pipe is less than or equal to the inner diameter of the connecting hole and less than the outer diameter of the second ring plate.

7. The easily detachable drainage hole structure with reverse filtration function according to claim 5, characterized in that, The first connecting surface is provided with an internal threaded hole, and a high-strength bolt passes through the second ring plate and connects to the internal threaded hole.

8. The easily detachable drainage hole structure with reverse filtration function according to claim 7, characterized in that, The internal threaded hole is a blind hole. Alternatively, the internal threaded hole is a through hole, its position corresponding to the anchor rod, and the end of the anchor rod facing the internal threaded hole is provided with an internal threaded groove.

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