Self-filtering soil retaining drain pipe structure for retaining wall

Abstract

The utility model provides a self-filtering soil-retaining water drain pipe structure for a retaining wall. The self-filtering soil-retaining water drain pipe structure comprises an outer pipe body, an inner pipe body and a water-filtering soil-retaining natural filling material, the outer pipe body is in an unequal-diameter cylinder shape with two open ends and comprises an outer pipe body filtering section, an outer pipe body drainage section and an outer pipe body variable-diameter connecting section. The inner pipe body is sleeved with the outer pipe body and comprises an inner pipe body filtering section, an inner pipe body water guiding section and an inner pipe body blind blocking plate. Wherein the inner pipe body filtering section corresponds to the outer pipe body filtering section, and the inner pipe body water guide section corresponds to the outer pipe body drainage section. And the water-filtering soil-retaining natural filling material is uniformly filled between the inner pipe body filtering section and the outer pipe body filtering section and is used for filtering pressure water in a soil layer and playing a soil-retaining role of preventing soil from losing along with water. The problems of low drainage capacity and soil layer loss can be solved, an inverted filter layer or an inverted filter bag can be omitted, the construction difficulty is reduced, and the construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of retaining wall drainage, in particular to a self-filtering retaining wall drainage pipe structure. Background Art

[0002] A retaining wall is a structure that supports the roadbed fill or hillside soil and prevents the fill or soil from deforming and becoming unstable. It is mainly composed of a base, a wall, and a drainage hole. The drainage hole is a small hole left at a certain distance on the wall when the retaining wall is built. Its function is to naturally drain the moisture of the soil behind the retaining wall, prevent the formation of hydrostatic pressure behind the wall, and ensure the safety of the retaining wall. At present, the main method of drainage is pre-buried drainage holes. A drainage pipe is inserted into the soil layer through the retaining wall. After the drainage pipe is cast in the retaining wall, the soil backfill construction behind the retaining wall is carried out. In order to avoid silt accumulation and blockage in the drainage pipe, an anti-filter layer or anti-filter bag is set between the drainage hole and the soil.

[0003] The filter layer or filter bag needs to be laid layer by layer, the construction process is complicated, the construction quality is difficult to control, and during the construction process and use after completion, the backfill soil sinks, the filter structure is easy to shift and damage, and even cause the drainage pipe to be blocked, causing the drainage of the retaining wall to fail, posing a safety hazard. The drainage function of the retaining wall can only be achieved by setting up a large number of drainage pipes, which is costly and difficult to maintain in the later stage. Utility Model Content

[0004] The utility model provides a self-filtering soil retaining drainage pipe structure for a retaining wall, which can solve the technical problems of low traditional drainage capacity and soil loss, and can save a reverse filter layer or a reverse filter bag, thereby reducing construction difficulty and construction cost.

[0005] The utility model provides a self-filtering soil retaining and drainage pipe structure for a retaining wall, comprising:

[0006] The outer tube body is in the shape of a cylinder with unequal diameters and openings at both ends, and includes an outer tube body filtering section, an outer tube body reducing connecting section and an outer tube body drainage section. The outer tube body filtering section is provided with a plurality of filtering circular holes; the outer tube body filtering section is arranged in the soil layer, the outer tube body drainage section is buried in the retaining wall, and the outer tube body reducing connecting section is used to connect the outer tube body filtering section and the outer tube body drainage section, so that the outer tube body drainage section and the outer tube body water filtering section form a trumpet opening shape facing the drainage direction.

[0007] The inner tube body includes an inner tube body filter section, an inner tube body water guide section and an inner tube body blind plate. The inner tube body filter section is provided with a plurality of filter circular holes. The inner tube body is sleeved in the outer tube body, wherein the inner tube body filter section corresponds to the outer tube body filter section, and the inner tube body water guide section corresponds to the outer tube body drainage section. During installation, the inner tube body is inserted from the opening of the outer tube body filter section, and the blind plate is used to maintain the assembly position between the inner tube body and the outer tube body.

[0008] Between the outer tube filter section and the inner tube filter section, natural water filtering and soil retaining materials are filled, and tree bristles, felt, etc. can be selected.

[0009] Furthermore, after the water-conducting section of the inner tube body is installed, the opening position is outside the diameter-changing section of the outer tube body and inside the water-draining section of the outer tube body.

[0010] Furthermore, the outer tube filter section is wrapped with geotextile.

[0011] Furthermore, the geotextile outside the outer tube filter section is fixed to the outside of the outer tube filter section by rolling.

[0012] Furthermore, natural filter material is filled between the inner tube filter section and the outer tube filter section to prevent the filter material from being damaged during earth backfilling.

[0013] Furthermore, the natural filter material is fixed to the outside of the inner tube filter section by rolling.

[0014] Furthermore, the inner tube body blind plate is used to fix the natural filter material between the inner tube body filter section and the outer tube body filter section and the geotextile of the outer tube body filter section, and to locate the assembly position of the inner tube body and the outer tube body.

[0015] Furthermore, the inner tube body is hollow to form a drainage channel.

[0016] Furthermore, the outer tube body variable diameter connecting section forms an outer tube body fixed section for fixing the geotextile outside the outer tube body filtering section, forming an inclined surface and constructing a trumpet-shaped opening opening in the drainage direction.

[0017] Furthermore, after the inner tube body water guide section is installed, the opening position is outside the outer tube body connecting variable diameter section and inside the outer tube body water guide pipe section.

[0018] The technical solution of the embodiment of the utility model has the following beneficial effects: the inner tube body is placed in the outer tube body, the inner tube body filtering section and the outer tube body filtering section are opposite, the inner tube body water guide section and the outer tube body drainage section are opposite, thereby forming a double-layer filtering structure and a hollow drainage structure, the double-layer filtering structure can prevent mud from directly entering the tube body to cause blockage and earth loss, the hollow drainage structure has no filtering structure, and can provide the drainage capacity of the structure; the outer tube body variable diameter connecting section forms an inclined surface, constructs a trumpet-shaped opening structure with an opening in the drainage direction, and the opening of the inner tube body water guide section exceeds the lower end of the inclined surface, the inclined surface can guide the water entering the drainage section of the outer tube body, and prevent the water in the drainage section from reversely entering the filtering material between the inner and outer tube bodies, thereby providing the drainage capacity of the utility model; the outer tube body filtering section and the inner tube body filtering section are both provided with circular filtering holes, the structure can retain the strength of the tube body to the greatest extent, and can increase the filtering area, thereby improving the filtering capacity, and at the same time can prevent the tube body from being deformed or damaged by external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a self-filtering soil retaining and drainage pipe structure for a retaining wall according to an embodiment of the utility model;

[0020] Description of Figure Numbers:

[0021] 1. Outer tube body; 101. Outer tube body filtering section; 102. Outer tube body reducing connection section; 103. Outer tube body drainage section; 104. Outer tube body filtering hole; 2. Inner tube body; 201. Inner tube body filtering section; 202. Inner tube body water guiding section; 203. Inner tube body blind plate; 204. Inner tube body filtering hole. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, implementation schemes, purposes and effects of the utility model, the utility model is now described.

[0023] The utility model provides a self-filtering soil retaining and drainage pipe structure for a retaining wall, such as Figure 1 As shown, the self-filtering soil retaining and drainage pipe comprises an outer pipe body 1, an inner pipe body 2 and a water filtering soil retaining natural filling material;

[0024] The outer tube body 1 is in the shape of a cylinder with unequal diameters and openings at both ends, and includes an outer tube body filtering section 101, an outer tube body reducing connecting section 102 and an outer tube body drainage section 103; the outer tube body filtering section 101 is evenly provided with filtering circular holes 104 of equal diameters and is arranged in the soil layer; the outer tube body drainage section 103 is buried in the retaining wall, and the outer tube body reducing connecting section 102 is used to connect the outer tube body filtering section 101 and the outer tube body drainage section 103;

[0025] The inner tube body 2 is in the shape of an equal-diameter cylinder with openings at both ends, and includes an inner tube body filter section 201, an inner tube body water guide section 202 and an inner tube body blind plate 203; the diameter of the inner tube body 2 is 1 / 2 of the diameter of the outer tube body filter section 101, the length of the inner tube body 2 is equal to the length of the outer tube body filter section 101, the inner tube body filter section 201 has a plurality of filter circular holes 204, the inner tube body 2 is sleeved in the outer tube body 1, the inner tube body filter section 201 corresponds to the outer tube body filter section 101, and the inner tube body water guide section 202 corresponds to the outer tube body drainage section 103.

[0026] The water filtering and soil retaining natural filling material is filled between the outer tube body filtering section 101 and the inner tube body filtering section 201 .

[0027] Specifically, in the embodiment of the utility model, during installation, the inner tube body 2 is inserted from the opening of the outer tube body filter section 101, and the inner tube body 2 relies on its blind plate 203 to maintain its assembly position with the outer tube body 1, ensuring that the inner tube body filter section 201 corresponds to the outer tube body filter section 101, and the end of the inner tube body water guide section 202 exceeds the outer tube body reducer connection section 102 and is shorter than the outer tube body drainage section 103, forming a self-filtering retaining water drainage pipe structure; when the water containing sediment and mud in the retaining wall passes through the filter circular hole 104 of the outer tube body filter section 101 under the action of pressure, it enters the outer tube body filter section 101 and When the natural water filter material is formed between the inner tube filter section 201, the water contained in the silt and mud will pass through the natural water filter material, while the sand and mud cannot pass through the natural water filter material, which plays a role in preventing soil erosion. The filtered water enters the inner tube water guide section 202 through the filter circular hole 204 of the inner tube filter section 201, and is discharged to the outer tube drainage section 103 under the action of gravity; in order to improve the filtering effect and the structural strength of the utility model, the diameter of the outer tube filter circular hole 104 needs to be slightly larger than the inner tube filter circular hole 204, and the two filter circular holes are arranged in a circular manner at the corresponding filter sections. The number and shape of the filter circular holes need to be set according to the installation environment on site, and no excessive restrictions are made here.

[0028] In the embodiment of the utility model, the outer tube section 101 is wrapped with a geotextile (not shown), and the inner tube filter section is wrapped with a natural filter material. The laying thickness of the material depends on the construction and installation environment. If the soil is fine, the natural filter material needs to be laid with a large thickness. On the contrary, the natural filter material needs to be laid with a small thickness. The geotextile outside the outer tube filter section 101 and the natural filter material outside the inner tube filter section 201 can both play a filtering role. The geotextile of the outer tube filter section 101 can block large particles of mud and sand outside the tube body of the utility model, and the natural water filtration material outside the inner tube filter section 201 can block smaller particles of mud and sand outside the inner tube body 2, so as to ensure the drainage performance of the drainage pipe under long-term use.

[0029] like Figure 1 As shown, in the embodiment of the utility model, the outer tube body variable diameter connecting section 102 forms a fixed end face, and after the geotextile is laid, it can be fixed on the outer tube body filter section 101 by rolling; after the utility model is assembled, the outer tube body variable diameter connecting section 102 and the inner tube body blind plate 203 form a groove for accommodating and fixing the geotextile outside the outer tube body filter section 102, and the geotextile part can be limited therein. The natural filter material outside the inner tube body filter section 201 is evenly laid and fixed by rolling after laying. After the utility model is assembled, the inner tube body blind plate 203 can withstand the axial pressure of the utility model, thereby protecting the natural filter material outside the inner tube body filter section 201 from only radial pressure, not axial pressure, thereby ensuring that the natural filter material outside the inner tube body filter section 201 is fixed and does not move.

[0030] In the embodiment of the utility model, a double-layer filtration is formed by the cooperation of the inner and outer tube bodies. Under the action of pressure, the water in the retaining wall is first filtered through the geotextile outside the outer tube body filter section 101, and then filtered through the natural filter material outside the inner tube body filter section 201. The filtered water directly enters the inner tube body 1 and is guided by the inner tube body guide section 202 to the outer tube body drainage section 103. Because the drainage sections 103 of the inner tube body and the outer tube body are free of fillers, a hollow drainage channel is formed, which can maximize the drainage capacity of the drainage pipe. Because the inner tube body 1 is a hollow structure, the pressure difference between the water inside the inner tube body and the retaining wall can be increased, thereby maximizing the water filtration capacity of the structure.

[0031] In the embodiment of the utility model, the outer tube body border connecting pipe section 102 can make the outer tube body drainage section 103 and the outer tube body water filtering section 101 form a trumpet opening shape in the drainage direction, which is convenient for the discharge of soil layer filtered water, reduces pipe section blockage, and avoids water accumulation in the filtering section.

[0032] In the embodiment of the utility model, the inner pipe section blind plate 203 can prevent muddy water from the axial direction from directly entering the inner pipe after assembly; at the same time, it is used to withstand the pressure from the axial direction and protect the natural filter material outside the inner pipe body filter section 201 from axial pressure, thereby avoiding axial displacement; it can form a groove with the outer pipe body variable diameter connecting section 102 to accommodate and fix the geotextile outside the outer pipe body filter section 101.

[0033] The above description is only for illustrating the specific implementation of the utility model, and is not intended to limit the scope of the utility model. Any modification or equivalent substitution made by a person skilled in the art without departing from the concept and principle of the utility model shall be included in the scope of the claims of the utility model.

Claims

1. A self-filtering retaining and drainage pipe structure for a retaining wall, characterized in that: The self-filtering soil retaining and drainage pipe structure comprises an outer pipe body (1), an inner pipe body (2) and a water-filtering soil retaining natural filling material; The outer tube body (1) is in the shape of a cylinder with unequal diameters and openings at both ends, and comprises an outer tube body filtering section (101), an outer tube body reducing connecting section (102) and an outer tube body drainage section (103); the outer tube body filtering section (101) is evenly provided with filtering circular holes (104) of equal diameters and is arranged in the soil layer; the outer tube body drainage section (103) is buried in the retaining wall, and the outer tube body reducing connecting section (102) is used to connect the outer tube body filtering section (101) and the outer tube body drainage section (103); The inner tube body (2) is in the shape of a cylinder with equal diameter and open at both ends, and comprises an inner tube body filtering section (201), an inner tube body water guiding section (202) and an inner tube body blind plate (203); the diameter of the inner tube body (2) is 1 / 2 of the diameter of the outer tube body filtering section (101); the length of the inner tube body (2) is equal to the length of the outer tube body filtering section (101); the inner tube body filtering section (201) is provided with a plurality of filtering circular holes (204); the inner tube body (2) is sleeved inside the outer tube body (1); the inner tube body filtering section (201) corresponds to the outer tube body filtering section (101); and the inner tube body water guiding section (202) corresponds to the outer tube body drainage section (103).

2. The self-filtering soil retaining and drainage pipe structure for a retaining wall according to claim 1, characterized in that: The water filtering and soil retaining natural filling material is filled between the outer tube body filtering section (101) and the inner tube body filtering section (201).

3. The self-filtering soil retaining and drainage pipe structure for a retaining wall according to claim 1, characterized in that: The outer tube body (1) is provided with an outer tube body diameter-changing connection section (102), and the outer tube body drainage section (103) and the outer tube body filtering section (101) are in a trumpet-shaped opening along the drainage direction.

4. The self-filtering soil retaining and drainage pipe structure for a retaining wall according to claim 1, characterized in that: The inner tube body (2) is inserted into the opening of the outer tube body filtering section (101).

5. The self-filtering soil retaining and drainage pipe structure for a retaining wall according to claim 1, characterized in that: An inner tube section blind plate (203) is provided at the front end of the inner tube body filtering section (201), and the assembly positioning of the inner tube body (2) and the outer tube body (1) is achieved by positioning the inner tube section blind plate (203).

6. The self-filtering soil retaining and drainage pipe structure for a retaining wall according to claim 1, characterized in that: The diameter, wall thickness, filter hole size and number of the outer tube filter section (101) and the inner tube filter section (201) can be set according to the soil moisture content.

7. The self-filtering soil retaining and drainage pipe structure for a retaining wall according to claim 1, characterized in that: The water filtering and soil retaining natural filling materials are selected from tree bristles, felt and the like.

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