Retaining wall drainage hole breaking device and retaining wall drainage structure

Abstract

The invention discloses a retaining wall drainage hole breaking device and a retaining wall drainage structure, relates to the field of foundations, and solves the problem that drainage cannot be performed after a drainage hole of a retaining wall is blocked. According to the technical scheme, the retaining wall drain hole breaking and dredging device comprises a shell and an inverted filter material filled in the shell, the shell comprises a cylindrical section and a pointed cone section at the front end of the cylindrical section, the cylindrical section and the pointed cone section are integrated or fixedly connected, the pointed cone section and the cylindrical section are each provided with a water permeable hole, and thorn pieces are further arranged on the outer side of the pointed cone section. The retaining wall drain hole breaking device is placed in a drain hole of a retaining wall, the shell part penetrates into backfill materials on the back face of the retaining wall in a rotating, hammering or pushing mode, a water permeable channel can be formed between the backfill materials and the drain hole, and the problem that the drain hole is blocked and cannot drain water is solved. The retaining wall drain hole breaking device not only can be used for construction of drain holes of newly built retaining walls, but also can be used for treatment of non-drainage of drain holes of built retaining walls.

Description

Technical Field

[0001] The invention relates to the foundation field, in particular to a through-hole breaker which is driven into a drainage hole of a retaining wall to make the drainage hole unobstructed and drain water, and a retaining wall drainage structure comprising the through-hole breaker. Background Art

[0002] The retaining wall mainly supports and drains the soil behind the wall. Therefore, the retaining wall must be arranged with drainage holes (also called drainage holes) at intervals to ensure the safety of the retaining wall. The drainage holes are usually formed by PVC pipes pre-buried in the wall. When backfilling one side of the back of the wall, a filter layer is set at the end of the drainage hole on the back of the wall (the water inlet end). The filter layer includes permeable gravel, filter material layer, filter cloth, etc. In addition, in order to facilitate construction, the construction unit usually purchases the finished filter bag and directly backfills it at the back of the wall near the water inlet end of the drainage hole.

[0003] The construction quality of the existing anti-filtration and permeable water layer is difficult to meet the standards, resulting in blockage of the drainage holes and loss of drainage function. The reason is that the anti-filtration and permeable water layer is constructed while the backfill is being carried out on the back of the wall. It is difficult to carry out fine backfilling in accordance with the design, resulting in the absence of an anti-filtration and permeable water layer at the water inlet end of the drainage hole, and the impermeable backfill material blocks the drainage hole; in addition, even if the anti-filtration and permeable water layer correspond to each other during the construction period, the backfill material on the back of the wall consolidates and settles, and the corresponding settlement of the anti-filtration and permeable water layer is also easy to be misaligned with the drainage hole, which leads to the blockage of the drainage hole. The blockage of the drainage hole is generally discovered after the backfill is completed. It is difficult to excavate the backfill material and re-construct the anti-filtration and permeable water layer, so that the blocked drainage hole is always in a blocked state. Summary of the invention

[0004] The present invention firstly provides a retaining wall drainage hole breaker to solve the problem that the drainage hole of the retaining wall cannot be drained after being blocked.

[0005] The technical solution adopted by the present invention is: a retaining wall drainage hole breaker, including a shell and a filter material filled in the shell, the shell includes a cylindrical section and a pointed cone section at the front end of the cylindrical section, the cylindrical section and the pointed cone section are a whole or fixedly connected, the pointed cone section and the cylindrical section are respectively provided with water permeable holes, and the outer side of the pointed cone section is also provided with a thorn piece.

[0006] The pointed cone section of the shell is used to reduce the resistance of the retaining wall drain hole breaker penetrating into the backfill material. Specifically: the pointed cone section of the shell is in a cone or pyramid shape.

[0007] In order to enable the thorns on the outer side of the pointed cone section of the shell to fully destroy the backfill material around it, further: the thorns on the outer side of the pointed cone section of the shell are arranged at intervals along the spiral direction.

[0008] In order to ensure the strength of the shell, the shell is generally made of metal. Specifically, the shell is made of steel.

[0009] Specifically, the filter material includes sand and gravel, and a permeable geotextile wrapping the sand and gravel.

[0010] To prevent the filter material from leaking out from the rear end of the housing, further: a end cap is provided at the rear end of the cylindrical section of the housing, and the end cap is provided with permeable holes; or, a bracket is provided at the rear end of the cylindrical section of the housing, and the bracket is fixedly connected to the housing.

[0011] To facilitate the insertion of the housing into the backfill behind the retaining wall by rotation, further: a bracket is provided at the rear end of the cylindrical section of the housing, and a slot hole is provided at the center of the bracket, and the slot hole is regular polygon in cross-section; the retaining wall drain hole unblocker further includes a rotating rod, and one end of the rotating rod is provided with a connecting section adapted to the shape of the slot hole and in the shape of a prism.

[0012] The rotating rod is used to rotate the housing. Since the thickness of the retaining wall is large and the depth of the drain hole is even greater, to facilitate the accurate insertion of the connecting section at one end of the rotating rod into the slot hole of the bracket, further: at least two centering frames are sleeved outside the rotating rod, and the diameters of the centering frames are equal, and the rotating rod is inserted into the through hole at the center of the centering frame.

[0013] The rotating rod and the centering frames are placed into the drain hole together. The centering frames can ensure that the rotating rod is arranged along the axis of the drain hole, facilitating the insertion of the connecting section of the rotating rod into the slot hole of the bracket. Specifically: the centering frame includes a central tube, a connecting rod and an arc plate. The rotating rod is inserted into the central tube. At least two connecting rods are arranged on the outer periphery of the central tube, and each connecting rod is perpendicular to the central tube. One end of each connecting rod away from the central tube is fixedly connected to the arc plate, and the radii of the arc plates are equal and the centers are all located on the central axis of the central tube.

[0014] To facilitate the manual rotation operation of the rotating rod, further: a connecting section is provided at the front end of the rotating rod, and a wrench is provided at the rear end of the rotating rod.

[0015] To make the manual rotation better adapt to retaining walls of different thicknesses, further: the rotating rod is connected in series by at least two sections.

[0016] The beneficial effects of the present invention are: when the drain hole of the retaining wall is blocked and cannot drain water, the retaining wall drain hole unblocker is placed into the drain hole of the retaining wall, and the housing is partially inserted into the backfill behind the retaining wall by rotation, hammering or pushing. Since the housing is filled with filter material inside, the backfill will not block the permeable holes of the housing and cannot enter the inside of the housing through the through holes. The spikes outside the sharp cone section can pierce the surrounding backfill, forming a permeable channel between the backfill and the drain hole, thereby solving the problem that the drain hole is blocked and cannot drain water.

[0017] When the drain hole is blocked again due to settlement on the back side of the retaining wall and cannot drain water, as long as a part of the drain hole breaker for retaining wall is located inside the drain hole, the shell can be further stabbed into the backfill of the retaining wall by means of rotation, hammering or pushing, etc., to resolve the problem that the drain hole is blocked and cannot drain water again.

[0018] The present invention also provides a drain structure for retaining walls, aiming to ensure the drainage capacity of the drain holes of the retaining walls. The technical solution adopted by the present invention is: the drain structure for retaining walls includes a retaining wall. On one side of the back of the retaining wall is the backfill. A drain hole is provided between the back and the front of the retaining wall. Any of the above-mentioned drain hole breakers for retaining walls is provided inside the drain hole, and the pointed cone section of the shell is located in the backfill on the back side of the retaining wall.

[0019] The beneficial effects of the present invention are as follows: During the construction of the retaining wall, drain holes are reserved. Later, the drain hole breaker for retaining wall is placed into the drain hole, and then the shell is stabbed into the backfill on the back side of the retaining wall by means of rotation, hammering or pushing, etc., to ensure that the drain hole has drainage capacity. After the construction of the retaining wall is completed, when the drain hole is blocked and cannot drain water, the shell can be further stabbed into the backfill on the back side of the retaining wall by means of rotation, hammering or pushing, etc., to restore the drainage capacity of the drain hole. The present invention can not only shorten the construction time of the retaining wall, but also facilitate the later operation and maintenance of the drain holes of the retaining wall. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the shell in an embodiment of the drain hole breaker for retaining wall of the present invention.

[0021] Figure 2 is a schematic structural diagram of another embodiment of the drain hole breaker for retaining wall of the present invention.

[0022] Figure 3 is Figure 2 a schematic structural diagram of the centering frame in the shown embodiment.

[0023] Figure 4 is a schematic diagram of an embodiment of the drain structure for retaining wall of the present invention.

[0024] Reference numerals: shell 1, cylindrical section 1-1, pointed cone section 1-2, permeable hole 1-3, spiked plate 1-4, support 1-5, rotating rod 2, centering frame 3, central tube 3-1, connecting rod 3-2, arc plate 3-3, retaining wall 4, backfill 5, drain hole 6, undisturbed soil 7. Detailed Embodiments

[0025] The present invention will be further described below with reference to the drawings.

[0026] The present invention first provides a drainage hole piercing device for retaining walls, which is used to be inserted into the drainage holes 6 of the retaining wall 4. The drainage hole piercing device for retaining walls pierces into the backfill 5 on the back side of the retaining wall 4, so that the drainage holes 6 form or restore the drainage performance. The drainage hole piercing device for retaining walls includes a housing 1 and a filter material filled inside the housing 1. In Figure 1 and Figure 2 In the illustrated embodiment, the filter material is not shown. The housing 1 includes a cylindrical section 1-1 and a tapered section 1-2 at the front end of the cylindrical section 1-1. The cylindrical section 1-1 and the tapered section 1-2 are an integral body or fixedly connected, for example, welded to each other. The lengths of the cylindrical section 1-1 and the tapered section 1-2 along the axial direction are not fixed. For example, the length of the tapered section 1-2 is about 300 mm, and the length of the cylindrical section 1-1 is about 400 mm. The function of the tapered section 1-2 of the housing 1 is to reduce the resistance of the drainage hole piercing device for retaining walls to pierce into the backfill 5. Therefore, the tapered section 1-2 of the housing 1 is conical or pyramidal. When the tapered section 1-2 is conical, the diameter of the bottom surface of the cone is the same as the outer diameter of the cylindrical section 1-1; when the tapered section 1-2 is pyramidal, the side length of the bottom surface of the pyramid is the same as the outer diameter of the cylindrical section 1-1, and there is a smooth transition between the cylindrical section 1-1 and the tapered section 1-2.

[0027] To ensure the strength of the housing 1, the housing 1 is generally made of metal, and the housing 1 is made of a corrosion-resistant material or undergoes an anti-corrosion treatment. For example, the material of the housing 1 is steel. The filter material is filled inside the housing 1. The filter material generally includes a permeable material such as sand and gravel, and a permeable geotextile that wraps the sand and gravel. To prevent the filter material from leaking out from the rear end of the housing 1, an end cap is provided at the rear end of the cylindrical section 1-1 of the housing 1. The end cap is provided with a permeable hole 1-3. The end cap can be fixedly connected to the rear end of the housing 1 or detachably connected to the rear end of the housing 1, for example, threadedly connected to the rear end of the housing 1. In addition, a bracket 1-5 can also be provided at the rear end of the cylindrical section 1-1 of the housing 1. The bracket 1-5 is fixedly connected to the housing 1. For example, the bracket 1-5 is welded and fixed to the rear end of the housing 1. The bracket 1-5 and the end cap also have the function of improving the strength of the rear end of the housing 1.

[0028] The tapered section 1-2 and the cylindrical section 1-1 are respectively provided with permeable holes 1-3, so that the water in the backfill 5 can enter the housing 1 through the permeable holes 1-3, and then flow out from the drainage holes 6 through the filter material. The permeable holes 1-3 can be round holes or polygonal holes. The shape of the permeable holes 1-3 in the tapered section 1-2 can be the same as or different from the shape of the permeable holes 1-3 in the cylindrical section 1-1. For example, in Figure 1 In the illustrated example, the permeable holes 1-3 in the tapered section 1-2 are circular, and the permeable holes 1-3 in the cylindrical section 1-1 are rectangular.

[0029] The housing 1 can be a single-layer structure or a double-layer structure. When the housing 1 is a double-layer structure, the housing 1 includes an inner shell and an outer shell. The outer contour of the tapered section 1-2 of the inner shell is frustum-shaped, and the outer contour of the tapered section 1-2 of the outer shell is conical. The inner shell is located inside the outer shell. A spiral guide groove is provided on the inner wall of the cylindrical section 1-1 of the outer shell, and a guide post adapted to the guide groove is provided on the outer wall of the cylindrical section 1-1 of the inner shell. The guide post is located in the guide groove and is in sliding fit with the guide groove. The inner shell can only reciprocate relative to the outer shell along the guide groove. Among them: The reciprocating motion of the inner shell relative to the outer shell can be divided into the reciprocating motion of the inner shell along the axis of the cylindrical section 1-1 and the rotational motion around the axis of the cylindrical section 1-1. Water permeable holes 1-3 are respectively provided on the inner shell and the outer shell. When the inner shell rotates relative to the outer shell, the water permeable holes 1-3 of the inner shell and the water permeable holes 1-3 of the outer shell can be aligned, and at this time the water permeable holes 1-3 are equivalent to being open; the water permeable holes 1-3 of the inner shell and the water permeable holes 1-3 of the outer shell can also be misaligned, and at this time the water permeable holes 1-3 are equivalent to being closed. A return spring is provided between the front end of the inner shell and the outer shell. When an external force pushes the inner shell forward relative to the outer shell from the rear end of the inner shell to the forward extreme position, the tapered section 1-2 of the inner shell abuts against the tapered section 1-2 of the outer shell, the return spring is compressed, the water permeable holes 1-3 of the inner shell and the water permeable holes 1-3 of the outer shell are misaligned, and the water permeable holes 1-3 are equivalent to being closed; after the external force at the rear end of the inner shell disappears, the return spring pushes the inner shell backward and rotates reversely, the tapered section 1-2 of the inner shell and the tapered section 1-2 of the outer shell are separated, the return spring is reset, the water permeable holes 1-3 of the inner shell and the water permeable holes 1-3 of the outer shell are aligned, and the water permeable holes 1-3 automatically open. When it is necessary to pierce the backfill 5 with the retaining wall drain hole piercer, the rear end of the inner shell can be rotated, hammered or pushed. When the rear end of the inner shell is subjected to an external force, the water permeable holes 1-3 of the inner shell and the water permeable holes 1-3 of the outer shell are misaligned, which is equivalent to closing the water permeable holes 1-3, and the backfill 5 can be prevented from entering the water permeable holes 1-3 and damaging the filter material. When the external force acting on the rear end of the inner shell disappears, the water permeable holes 1-3 of the inner shell and the water permeable holes 1-3 of the outer shell are aligned, which is equivalent to automatically opening the water permeable holes 1-3, so that the water in the backfill 5 can enter the filter material through the water permeable holes 1-3 and then be discharged through the drain hole 6.

[0030] Spike pieces 1-4 are also provided on the outer side of the tapered section 1-2 of the housing 1. The spike pieces 1-4 are used to break the backfill 5 outside the tapered section 1-2. When the housing 1 is a double-layer structure, spike pieces 1-4 are provided on the outer side of the tapered section 1-2 of the outer shell. In order to enable the spike pieces 1-4 to fully break the backfill 5 around them, the spike pieces 1-4 on the outer side of the tapered section 1-2 are arranged at intervals along the spiral direction.

[0031] See Figure 2, To facilitate the insertion of the housing 1 into the backfill 5 on the back of the retaining wall 4 by rotation, a bracket 1-5 is provided at the rear end of the cylindrical section 1-1 of the housing 1. When the housing 1 is of a double-layer structure, the bracket 1-5 is provided at the rear end of the inner housing. The retaining wall drain hole opener further includes a rotating rod 2, which is used to cooperate with the bracket 1-5 so that the housing 1 can be rotated by the rotating rod 2 outside the drain hole 6. The bracket 1-5 generally has a Y shape or a cross shape, and a Y-shaped or cross-shaped slot is provided at one end of the rotating rod 2, and the center of the bracket 1-5 can be inserted into the slot of the rotating rod 2. In addition, a slot hole is provided at the center of the bracket 1-5, and the slot hole is a regular polygon in cross-section. A connecting section in the shape of a prism adapted to the shape of the slot hole is provided at one end of the rotating rod 2, and the connecting section is inserted into the slot hole of the bracket 1-5, so that the housing 1 can be rotated by rotating the rotating rod 2.

[0032] Due to the large thickness of the retaining wall 4, the drain hole 6 is arranged obliquely downward along the drainage direction, and the depth of the drain hole 6 is greater than the thickness of the retaining wall 4. To facilitate the accurate transmission connection between the rotating rod 2 and the bracket 1-5, for example, to facilitate the accurate insertion of the connecting section of the rotating rod 2 into the slot hole of the bracket 1-5, at least two centering frames 3 are also sleeved outside the rotating rod 2. The diameters of the centering frames 3 are equal, and the rotating rod 2 is inserted into the through hole at the center of the centering frame 3. For example, in Figure 2 the illustrated embodiment, there are three centering frames 3. The diameter of each centering frame 3 is the same as the diameter of the drain hole 6, and the centering frame 3 is used to ensure that the rotating rod 2 is arranged along the axis of the drain hole 6. As Figure 3 shown, the centering frame includes a central tube 3-1, a connecting rod 3-2, and an arc plate 3-3. The rotating rod 2 is inserted into the central tube 3-1, and at least two connecting rods 3-2 are provided on the outer periphery of the central tube 3-1. For example, there are four connecting rods 3-2 and they are in a cross shape. Each connecting rod 3-2 is perpendicular to the central tube 3-1. One end of each connecting rod 3-2 away from the central tube 3-1 is fixedly connected to the arc plate 3-3. The radii of the arc plates 3-3 are equal and the centers coincide, and the center is located on the central axis of the central tube 3-1. To facilitate the manual rotation of the rotating rod 2, a connecting section is provided at the front end of the rotating rod 2, and a wrench is provided at the rear end of the rotating rod 2. To make the manual rotation better adapt to retaining walls 4 of different thicknesses, the rotating rod 2 is connected in series by at least two sections. For example, the rotating rod 2 is formed by threading at least two sections together, which is convenient for assembling a rotating rod 2 of an appropriate length according to the depth of the drain hole 6.

[0033] The second subject of the present invention is the retaining wall drainage structure. As Figure 4As shown in the figure, the drainage structure of the retaining wall includes a retaining wall 4. On the back side of the retaining wall 4 is backfill 5. A drainage hole 6 is provided between the back and the front of the retaining wall 4. The drainage hole breaker for the retaining wall drainage hole described in the first theme is provided in the drainage hole 6, and the tapered section 1-2 of the housing 1 is located in the backfill 5 on the back side of the wall. The drainage hole breaker for the retaining wall drainage hole can not only be used for the construction of the drainage hole 6 of the newly built retaining wall 4, but also be used for the treatment of the non-drainage of the drainage hole 6 of the existing retaining wall 4.

Claims

1. Drainage hole piercer for retaining wall, characterized in that: It includes a housing (1) and an anti-filter material filled inside the housing (1). The housing (1) includes a cylindrical section (1-1) and a tapered section (1-2) at the front end of the cylindrical section (1-1). The cylindrical section (1-1) and the tapered section (1-2) are an integral body or fixedly connected. The tapered section (1-2) and the cylindrical section (1-1) are respectively provided with water-permeable holes (1-3), and barbs (1-4) are also provided on the outer side of the tapered section (1-2).

2. The drain hole breaker for retaining wall according to claim 1, characterized in that: The tapered section (1-2) of the housing (1) is conical or pyramidal in shape.

3. The drain hole breaker for retaining wall according to claim 1, characterized in that: The barbs (1-4) on the outer side of the tapered section (1-2) of the housing (1) are arranged at intervals along the spiral direction.

4. The drain hole breaker for retaining wall according to claim 1, characterized in that: The material of the housing (1) is steel, and the anti-filter material includes sand and gravel and a water-permeable geotextile wrapping the sand and gravel.

5. The drain hole breaker of the retaining wall according to claim 1, characterized in that: A end cap is provided at the rear end of the cylindrical section (1-1) of the housing (1), and the end cap is provided with water-permeable holes; alternatively, a bracket (1-5) is provided at the rear end of the cylindrical section (1-1) of the housing (1), and the bracket (1-5) is fixedly connected to the housing (1).

6. The drainage hole unblocking device for retaining walls according to any one of claims 1 to 5, characterized in that: A bracket (1-5) is provided at the rear end of the cylindrical section (1-1) of the housing (1), and a slot hole is provided at the center of the bracket (1-5). The slot hole is regular polygon in cross-section; the drain hole breaker for retaining wall also includes a rotating rod (2), and one end of the rotating rod (2) is provided with a connecting section in the shape of a prism adapted to the shape of the slot hole.

7. The drain hole breaker for retaining wall according to claim 6, characterized in that: At least two centering frames (3) are also sleeved on the outer side of the rotating rod (2). The diameters of the respective centering frames (3) are equal, and the rotating rod (2) is inserted into the through hole at the center of the centering frame (3).

8. The water drainage hole breaker of the retaining wall according to claim 7, characterized in that: The centering frame (3) includes a central tube (3-1), a connecting rod (3-2) and an arc-shaped plate (3-3). The rotating rod (2) is inserted into the central tube (3-1). At least two connecting rods (3-2) are provided on the outer periphery of the central tube (3-1). Each connecting rod (3-2) is perpendicular to the central tube (3-1). One end of each connecting rod (3-2) away from the central tube (3-1) is fixedly connected to the arc-shaped plate (3-3). The radii of the respective arc-shaped plates (3-3) are equal and the centers are located on the central axis of the central tube (3-1).

9. The water drainage hole breaker for retaining wall according to claim 6, characterized in that: A connecting section is provided at the front end of the rotating rod (2), a wrench is provided at the rear end of the rotating rod (2), and the rotating rod (2) is connected in series by at least two sections.

10. Drainage structure for retaining wall, comprising a retaining wall (4), with a backfill (5) on one side of the back of the retaining wall (4), and a drainage hole (6) provided between the back and the front face of the retaining wall (4), characterized in that: The drain hole breaker for retaining wall described in any one of the above claims 1 to 6 is provided in the drain hole (6), and the tapered section (1-2) of the housing (1) is located in the backfill (5) on the wall back side.

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