Easily-disassembled drain hole structure with reverse filtering function and construction method

Abstract

The invention provides an easy-to-disassemble drain hole structure with an inverted filter function and a construction method.The drain hole structure comprises an embedded sleeve, a drain pipe and an inverted filter layer, the drain pipe penetrates through the embedded sleeve, and a first annular plate and an embedded anchoring part are arranged at the two ends of the embedded sleeve respectively; 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] The invention relates to the technical field of retaining wall drainage hole construction, and in particular to an easily dismantled drainage hole structure with a reverse filtering function and a construction method. Background Art

[0002] Retaining wall is an important civil engineering structure, widely used in various construction projects. With its unique structure and function, it provides effective solutions for slope stability, water flow control, space utilization, engineering protection, landscape construction and other aspects. In the actual construction and use of retaining walls, the water contained in the soil layer behind the retaining wall has a significant impact on the service life and safety of the retaining wall. In order to drain the moisture of the soil behind the wall, prevent ground water from infiltrating, reduce the softening of soil by water, reduce water pressure and frost heave force, and ensure structural safety, a drainage system should be set up for the retaining wall.

[0003] At present, the drainage system of retaining walls generally adopts a combination of drainage holes and walls with a filter layer set behind the wall. However, there are still certain problems in the actual construction of such drainage systems at this stage. Among them, the more common problem is the setting and effect of the filter layer.

[0004] As a very important part of the retaining wall drainage system, the filter layer is used to prevent the water from carrying away the fine particles in the soil during the drainage process, so as to avoid soil erosion and ensure the safety of the soil structure. At present, the main method of constructing the filter layer is to backfill the filter layer at the same time as the backfill soil behind the wall. However, in the actual construction process, the production and backfilling of the filter layer are greatly affected by external factors: ① Different construction teams have different production quality of the filter layer, and even cut corners; ② Mechanical backfilling is mostly used in the backfilling process, and the efficiency of the simultaneous construction of the filter layer and the backfill soil layer is slow, which cannot fully play the advantage of the fast speed of mechanical construction; ③ During the construction process, the position and thickness of the filter layer are often not accurately controlled, and the process of mechanical backfilling may also damage the constructed filter layer; ④ The settlement of the retaining wall in the later stage will cause the filter layer to deviate or even fail.

[0005] Therefore, in the actual construction process, it is difficult to control the construction quality of the filter layer, and the quality problems of the filter layer will usually gradually appear during the long period of use after the completion of the project, and it is difficult to find it during construction. Once the filter layer fails, in the subsequent use process, as the accumulated water is discharged from the drainage holes, a large amount of soil particles will be lost with the water, seriously affecting the safety of the soil structure behind the retaining wall and the safety of the buildings on the backfill soil behind the retaining wall. The resulting blockage of the drainage holes will also cost more cleaning costs.

[0006] Therefore, the impact of the actual construction quality of the filter layer on the project quality and service life is difficult to predict and control, and once a problem is found, it is determined that the filter layer needs to be reworked, and the rework operation is also very time-consuming and labor-intensive. It is necessary to excavate the backfill soil, re-install the filter layer, and then backfill the soil layer. Especially if there are buildings on the backfill soil behind the retaining wall, the rework cost is extremely high, and in most cases the filter layer cannot be reconstructed, resulting in serious quality accidents such as the buildings on the backfill soil cannot be used anymore and the retaining wall collapses. Summary of the invention

[0007] The object of the present invention is to provide an easily dismantled drain hole structure with anti-filtration function and a construction method to solve the above-mentioned problems.

[0008] The technical solution adopted by the present invention is: an easily detachable drainage hole structure with an anti-filtration function, which includes a pre-buried casing, a drainage pipe and an anti-filtration layer, the drainage pipe is inserted into the pre-buried casing, and the two ends of the pre-buried casing are respectively provided with a first ring plate and an embedded anchor, the first ring plate can block the wall gap between the drainage pipe and the pre-buried casing, one end of the drainage pipe is provided with a second ring plate, and the second ring plate is detachably connected to the pre-buried anchor; the anti-filtration layer is detachably constructed in the drainage pipe.

[0009] Furthermore, a clamping strip is provided on the inner wall of the embedded sleeve, and the clamping strip extends along the axial direction of the embedded sleeve. A clamping groove extending in the same direction as the clamping strip and having a matching shape is provided on the outer wall of the drain pipe.

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

[0011] Furthermore, the filter layer includes a filter geotextile and a filter material, and the filter material is located inside the filter geotextile.

[0012] Furthermore, the embedded anchor includes a connecting block and an anchor rod, a connecting block is provided with a connecting hole, and the axial ends of the connecting hole are respectively provided with a first connecting surface and a second connecting surface, the second ring plate and the second connecting surface are respectively 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 ≤ the inner diameter of the connecting hole and is less than the outer diameter of the second ring plate.

[0014] Furthermore, an internal threaded hole is provided on the first connection surface, and a high-strength bolt penetrates through the second ring plate and then connects to the internal threaded hole.

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

[0016] The technical solution of the present invention also includes: a method for constructing the easily dismantled drain hole structure with reverse filtration function as described above, which comprises the steps of:

[0017] After assembling the filter layer and the drain pipe, install the drain pipe into the embedded casing, make one end of the drain pipe close to the first ring plate, and connect the second ring plate to the embedded anchor;

[0018] Pre-embedding the drainage hole structure into the retaining wall to construct the retaining wall;

[0019] Carry out backfill construction behind the retaining wall;

[0020] The drainage hole structure is tilted, with its high position close to the backfill soil and its low position far away from the backfill soil.

[0021] The beneficial effects of the present invention are as follows: the drain pipe and the embedded sleeve are split and easily detachable structures, the filter layer and the drain pipe are also split and easily detachable structures, the filter layer can separate the water and sand (or soil) flowing from the backfill soil, the water is discharged by the drain pipe, and the sand (or soil) is left outside the filter layer on the side close to the backfill soil, thereby reducing the loss of solid phase components of the backfill soil and ensuring the structural safety and service life of the backfill soil and the buildings above it; the embedded sleeve can protect the drain pipe when the retaining wall settles, and the settlement of the retaining wall does not affect the normal use function of the drain hole structure, and the drain pipe and the filter layer in the drain hole structure can also be disassembled, repaired and replaced at any time, and the operation during replacement is compared with the prior art of excavating backfill soil-rebuilding the filter layer-backfilling soil again, and its efficiency is improved by an order of magnitude, which greatly reduces the time cost and financial cost of construction, repair and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a front view of an embodiment of the present invention in use;

[0023] Figure 2 It is a main structural diagram of an embodiment of the present invention;

[0024] Figure 3 1. It is a left view and a front view of the embedded anchor member in the embodiment of the present invention;

[0025] Figure 4 is a front cross-sectional view of a drain pipe in an embodiment of the present invention;

[0026] Figure 5 It is a right side view of the drain pipe in the embodiment of the present invention;

[0027] Figure 6 It is a left view of the embedded sleeve in the embodiment of the present invention.

[0028] In the figure:

[0029] 1. Pre-buried casing;

[0030] 2. Drain pipe; 2-1. Drain tank; 2-2. Filter tank;

[0031] 3. Anti-filter layer; 3-1. Anti-filter geotextile; 3-2. Anti-filter material;

[0032] 4. The first ring plate;

[0033] 5. 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;

[0034] 6. Second ring plate; 6-1. Positioning hole;

[0035] 7. Card connection strip;

[0036] 8. Card slot;

[0037] 9. Anti-filter cabin cover;

[0038] 10. Filter;

[0039] 11. High-strength bolts;

[0040] 12. Retaining wall;

[0041] 13. Backfill the soil. DETAILED DESCRIPTION

[0042] The technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0044] Reference Figure 1-6 The present embodiment provides an easily dismantled drainage hole structure with an anti-filtration function, which comprises an embedded casing 1, a drainage pipe 2 and an anti-filtration layer 3. The embedded casing 1 is embedded in the retaining wall 12, and its two ends are respectively connected to the two sides of the retaining wall 12, and the end close to the backfill 13 is provided with a first ring plate 4, and the end away from the backfill 13 is provided with an embedded anchor 5; the drainage pipe 2 is penetrated in the embedded casing 1, and the first ring plate 4 is used to block the wall gap between the drainage pipe 2 and the embedded casing 1 to prevent water and soil in the backfill 13 from entering the wall gap between the drainage pipe 2 and the embedded casing 1; the end of the drainage pipe 2 away from the backfill 13 is provided with a second ring plate 6, and the second ring plate 6 is detachably connected to the embedded anchor 5. The functions of the embedded anchor 5 include: improving the connection stability between the embedded casing 1 and the retaining wall 12, and connecting and fixing the second ring plate 6 and the drainage pipe 2; the anti-filtration layer 3 is detachably constructed in the drainage pipe 2.

[0045] By adopting the above technical scheme, the embedded sleeve 1 and the embedded anchor 5 are firmly installed when the retaining wall 12 is constructed. The drain pipe 2 and the filter layer 3 can be installed in the 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 drain pipe 2, while the sand (or soil) is left outside the filter layer 3 on the side close to the backfill 13, thereby reducing the loss of solid phase components of the backfill 13 and ensuring the structural safety and service life of the backfill 13 and the buildings above it. In addition, the embedded sleeve 1 can settle together with the retaining wall 12, and the settlement of the retaining wall 12 does not affect the normal use function of the drainage hole structure. The drainage pipe 2 and the filter layer 3 in the drainage hole structure can also be disassembled, repaired and replaced at any time. Compared with the prior art of excavating backfill 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, repair and maintenance.

[0046] The above-mentioned filter layer 3 can be constructed using a filter geotextile 3-1 and a filter material 3-2. The filter geotextile 3-1 can be wrapped around the filter material 3-2. The filter material 3-2 can be selected according to actual construction requirements. For example, solids of different particle sizes in the 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 a factory.

[0047] In order to improve the connection stability between the embedded sleeve 1 and the drain pipe 2 and prevent rotation and dislocation, the present embodiment provides a clamping strip 7 on the inner wall of the embedded sleeve 1, the clamping strip 7 extends along the axial direction of the embedded sleeve 1, and the outer wall of the drain pipe 2 is provided with a clamping groove 8 extending in the same direction as the clamping strip 7 and having a matching shape. 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 embedded sleeve 1 with the embedded anchor 5, and is tightened to the first ring plate 4, and then the second ring plate 6 is connected and tightened with the embedded anchor 5. The operation is simple and fast, and the installation is stable.

[0048] The above-mentioned clamping strips 7 can be arranged in a plurality around the circumference of the embedded sleeve 1 , and accordingly, the clamping grooves 8 are also arranged in a plurality around the circumference of the drain pipe 2 and correspond to the positions of the clamping strips 7 .

[0049] In order to meet the installation requirements of the drain pipe 2, the present embodiment provides a connecting block 5-1 in the embedded anchor 5, and a connecting hole 5-2 is provided in the connecting block 5-1, one end of the connecting hole 5-2 is connected to the embedded sleeve 1, and the outer diameter of the drain pipe 2 is ≤ the inner diameter of the connecting hole 5-2 < the outer diameter of the second ring plate 6 to ensure that the drain pipe 2 can be installed in the embedded sleeve 1, and the second ring plate 6 can block the wall gap between the embedded sleeve 1 and the connecting hole 5-2.

[0050] In this embodiment, the drain pipe 2 is provided with a drain tank 2-1 and a filter tank 2-2 distributed along its axial direction, wherein the filter tank 2-2 is arranged close to the backfill soil 13, and the drain tank 2-1 can be constructed on both sides thereof or on the side thereof away from the backfill soil 13, and a detachable filter tank cover 9 is arranged on the side wall of the drain pipe 2, and the filter tank cover 9 corresponds to the position of the filter tank 2-2, and the drain tank 2-1 is isolated from the filter tank 2-2 by a filter screen 10, and the filter layer 3 is located in the filter tank 2-2. Since the retaining wall 12 has a certain thickness, the drain pipe 2 has a certain length, and it is difficult to insert or extract the filter layer 3 from the end of the drain pipe 2, so a hole is opened on the side wall of the drain pipe 2 and a filter tank cover 9 is arranged, which can facilitate the disassembly and replacement of the filter layer 3, and improve the efficiency of construction, maintenance and replacement.

[0051] The filter chamber cover 9 is configured as an arc plate, and the side wall of the filter chamber 2-2 is enclosed to form a continuous pipe wall that is the same as 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 so that it can only be moved and installed along the radial direction of the drain pipe 2, but cannot slide along the axial direction of the drain pipe 2 to ensure the use function of the structure. A groove structure that is continuous with the clamping groove 8 on the wall of the drain pipe 2 can also be set on the outer wall of the arc plate to improve the positioning effect.

[0052] In addition, an anchor rod 5-3 is also provided in the embedded anchor 5, and a first connecting surface 5-4 and a second connecting surface 5-5 are respectively provided at the axial ends of the connecting hole 5-2 on the connecting block 5-1, and 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. When the drainage hole structure provided in this embodiment is used, the embedded sleeve 1 and the drainage pipe 2 are both arranged in an inclined shape, with the high position close to the backfill soil 13 and the low position away from the backfill soil 13, so as to improve the drainage efficiency; the first connection surface 5-4 is used to fit the second ring plate 6 to ensure the connection stability and tightness 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, and the second connection surface 5-5 is used to fit the wall surface of the retaining wall 12 to ensure the connection stability and tightness between the embedded anchor 5 and the retaining wall 12. During implementation, the second connection surface 5-5 can also be welded and fixed with the embedded sleeve 1 to further improve the connection stability and service life.

[0053] An internal threaded hole 5-6 is provided on the first connecting surface 5-4, and a positioning hole 6-1 (which can be a smooth hole or a screw hole) is provided on the second ring plate 6. A high-strength bolt 11 is passed 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 firmly connect the embedded anchor 5 and the drain pipe 2.

[0054] 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 thread groove (not shown in the figure), so that the high-strength bolt 11 passes through the internal threaded hole 5-6 and is connected to the anchor rod 5-3, further improving the connection tightness and service life of the drainage hole structure.

[0055] Of course, the high-strength bolt 11 can also be replaced by a combination of a screw and a nut, in which 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. In this way, the process of opening the internal threaded hole 5-6 can be avoided, and its production is simpler.

[0056] Compared with the prior art, the beneficial effects of the present invention are as follows: the drainage pipe 2 and the embedded sleeve 1 are split and easily detachable structures, the filter layer 3 and the drainage pipe 2 are also split and easily detachable structures, 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, and the sand (or soil) is left outside the filter layer 3 on the side close to the backfill 13, thereby reducing the loss of solid phase components of the backfill 13 and ensuring the structural safety and service life of the backfill 13 and the buildings above it; the embedded sleeve 1 can protect the drainage pipe when the retaining wall 12 settles, and the settlement of the retaining wall 12 does not affect the normal use function of the drainage hole structure, and the drainage pipe 2 and the filter layer 3 in the drainage hole structure can also be disassembled, repaired and replaced at any time, and the operation during replacement is compared with the prior art of excavating the backfill 13-rebuilding the filter layer 3-backfilling the soil 13 again, and its efficiency is improved by an order of magnitude, which greatly reduces the time cost and financial cost of construction, repair and maintenance.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0058] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An easily dismantled drain hole structure with reverse filtering function, characterized in that: It includes an embedded casing, a drain pipe and an inverted filter layer. The drain pipe is inserted into the embedded casing. Both ends of the embedded casing are respectively provided with a first ring plate and an embedded anchor. The first ring plate can block the wall gap between the drain pipe and the embedded casing. One end of the drain pipe is provided with a second ring plate, and the second ring plate is detachably connected to the embedded anchor. The inverted filter layer is detachably constructed in the drain pipe.

2. The easily dismantled drain hole structure with reverse filtering function according to claim 1, characterized in that: The inner wall of the embedded sleeve is provided with a clamping strip, and the clamping strip extends along the axial direction of the embedded sleeve. The outer wall of the drain pipe is provided with a clamping groove extending in the same direction as the clamping strip and having a matching shape.

3. The easily dismantled drain hole structure with reverse filtering function according to claim 2, characterized in that: The drain pipe is provided with a drain tank and a filter tank distributed along its axial direction, a detachable filter tank cover is provided on the side wall of the drain pipe, the filter tank cover corresponds to the position of the filter tank, the drain tank is isolated from the filter tank by a filter screen, and the filter layer is located in the filter tank.

4. The easily detachable drain hole structure with reverse filtering function according to any one of claims 1 to 3, characterized in that: The reverse filter layer comprises a reverse filter geotextile and a reverse filter material, and the reverse filter material is located inside the reverse filter geotextile.

5. The easily dismantled drain hole structure with reverse filtering function according to claim 4, characterized in that: The embedded anchor comprises a connecting block and an anchor rod, a connecting block is provided with a connecting hole, a first connecting surface and a second connecting surface are respectively provided at two axial ends of the connecting hole, the second ring plate and the second connecting surface are respectively 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 dismantled drain hole structure with reverse filtering function according to claim 5, characterized in that: The outer diameter of the drain pipe is ≤ the inner diameter of the communicating hole and is less than the outer diameter of the second ring plate.

7. The easily dismantled drain hole structure with reverse filtering function according to claim 5, characterized in that: An internal thread hole is provided on the first connection surface, and a high-strength bolt passes through the second ring plate and then connects to the internal thread hole.

8. The easily dismantled drain hole structure with reverse filtering 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, the position of which corresponds to the anchor rod, and the end of the anchor rod facing the internal threaded hole is provided with an internal thread groove.

9. A method for constructing an easily dismantled drain hole structure with reverse filtration function using any one of claims 1 to 7, characterized in that: Includes steps: After assembling the filter layer and the drain pipe, install the drain pipe into the embedded casing, make one end of the drain pipe close to the first ring plate, and connect the second ring plate to the embedded anchor; Pre-embedding the drainage hole structure into the retaining wall to construct the retaining wall; Carry out backfill construction behind the retaining wall; The drainage hole structure is tilted, with its high position close to the backfill soil and its low position far away from the backfill soil.

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