Pervious concrete small-section drainage tunnel structure

Abstract

The utility model discloses a pervious concrete small-section drainage tunnel structure which comprises a tunnel body, the tunnel body comprises a concrete layer, a capillary drainage belt is arranged on the inner side of the concrete layer, drainage channels are arranged on the two inner sides of the lower portion of the tunnel body, the capillary drainage belt is communicated with the drainage channels, the concrete layer is made of pervious concrete, and the capillary drainage belt is communicated with the drainage channels. A combined structure of geotechnical cloth, pervious concrete and capillary drainage belts is adopted, the pervious area can be increased, the drainage efficiency can be improved, and the problem that a common drainage pipe is blocked can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage holes, in particular to a small-section drainage hole structure of permeable concrete. Background Art

[0002] In water conservancy and hydropower projects, drainage holes, as one of the main drainage measures in water conservancy projects, play a role in intercepting and draining groundwater and lowering the groundwater level inside the slope. The damage of high slopes is usually caused by changes in the water content in the soil. It quickly discharges groundwater pressure and removes excess water in the soil. Traditional slope drainage holes have a large hole diameter, complex support, and a long construction period. It is difficult to control the anti-seepage damage of the drainage hole itself and it is difficult to solve the problem of blockage of the drainage pipe due to long-term sedimentation. Utility Model Content

[0003] In view of the above-mentioned prior art, the utility model provides a permeable concrete small-section drainage hole structure, which can mainly increase the permeable area, improve the drainage efficiency, and solve the problem of blockage of ordinary drainage pipes.

[0004] To achieve the above purpose, the technical solution of the embodiment of the utility model is implemented as follows:

[0005] A permeable concrete small-section drainage hole structure comprises a hole body, wherein the hole body comprises a concrete layer, a capillary drainage belt is arranged inside, drainage channels are arranged on both sides of the bottom of the hole body, and the capillary drainage belt is connected to the drainage channel.

[0006] Furthermore, a geotextile is laid on the outer side of the concrete layer.

[0007] Furthermore, the hole body includes a plurality of annular tubes, and adjacent annular tubes are connected by bolts and mortise and tenon joints.

[0008] Furthermore, the annular tube includes a bottom plate, a left wall block, a right wall block, a left top plate and a right top plate. The left and right sides of the bottom plate are respectively connected to the left wall block and the right wall block by mortise and tenon joints, the left wall block is connected to the left top plate by mortise and tenon joints, the right wall block is connected to the right top plate by mortise and tenon joints, and the top ends of the left top plate and the right top plate are connected by mortise and tenon joints.

[0009] Furthermore, an expansion water stop strip is provided at the connection between the bottom plate and the left wall block, and the expansion water stop strip is provided at the connection between the bottom plate and the right wall block.

[0010] Furthermore, the annular tube is provided with longitudinal straight bolt holes.

[0011] Furthermore, the annular tube is provided with bent bolt connection holes.

[0012] Furthermore, the bottom plate, the left wall block and the right wall block are made of C25 reinforced concrete.

[0013] Furthermore, the left top plate and the right top plate are made of high-strength permeable concrete and pre-embedded FRP bars.

[0014] Furthermore, a rubber cushion layer is provided in the annular direction of the annular tube.

[0015] The beneficial effects of the utility model are: increasing the permeable area, improving the drainage efficiency, replacing the ordinary drainage pipe with a capillary drainage pipe, utilizing the capillary water absorption principle and siphon effect to solve the blockage of the drainage pipe and the disturbance of the soil by the traditional drainage pipe, and arranging it along the cave wall to reduce the effect of water dripping from the top causing the stone to wear away. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic longitudinal diagram of a drainage hole in an embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the drainage hole in the embodiment of the present application;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the drainage hole in the embodiment of the present application;

[0019] Description of Figure Numbers:

[0020] 1 cave body, 2 concrete layer, 3 capillary drainage belt, 4 drainage channel, 5 ring pipe, 6 bottom plate, 7 left wall block, 8 right wall block, 9 left top plate, 10 right top plate, 11 expansion water stop strip, 12 geotextile, 13 longitudinal straight bolt hole, 14 bent bolt connection hole, 15 rubber cushion, 16 tenon, 161 mortise, 17 cylindrical connection tenon. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the utility model. The terms used herein in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0022] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0023] Example 1

[0024] See attached Figure 1-3 The present application provides a small-section permeable concrete drainage hole structure, a small-section permeable concrete drainage hole structure, comprising a hole body 1, the hole body 1 comprising a concrete layer 2, the concrete layer 2 plays the role of a supporting structure, a capillary drainage belt 3 is arranged on the inner side, and drainage is carried out by utilizing the capillary water absorption principle and siphon effect, drainage channels 4 are arranged on both sides of the lower inner side of the hole body 1, the capillary drainage belt 3 is connected to the drainage channel 4, and gravity is used to guide the flow to the drainage channel 4, when the flow rate is small, the excess water is quickly discharged through the drainage channel 4, and when the flow rate is large, the hole body 1 is used for drainage, the material of the concrete layer 2 is permeable concrete and C25 reinforced concrete, the permeable concrete material is used as the raw material of the drainage hole body 1, the water permeability of the drainage hole is increased, and the C25 reinforced concrete improves the bearing capacity, the present application has the advantages of increasing the permeable area and improving the drainage efficiency, using the capillary drainage belt 3 to replace the ordinary drainage pipe, utilizing the capillary water absorption principle and siphon effect, solving the blockage of the drainage pipe and the disturbance of the soil body by the traditional drainage pipe, and arranging it along the hole wall to reduce the effect of dripping water from the top.

[0025] Specifically, the hole body 1 includes a plurality of annular tubes 5, and adjacent annular tubes 5 are connected by bolts and mortise and tenon joints. Two adjacent annular tubes 5 are respectively provided with a tenon 16 and a mortise 161 that fit together. Mutually fitting cylindrical connecting tenons 17 are provided between adjacent left side wall blocks. The mortise and tenon joint has the advantages of high stability, strong durability and convenient construction.

[0026] Specifically, the annular tube 5 includes a bottom plate 6, a left side wall block 7, a right side wall block 8, a left top plate 9 and a right top plate 10. The left and right sides of the bottom plate 6 are respectively connected to the left side wall block 7 and the right side wall block 8 by mortise and tenon joints. The bottom plate 6 is provided with a tenon 16 (or a mortise 161). The left side wall block 7 and the right side wall block 8 are respectively provided with a mortise 161 (or a tenon 16) matched with the tenon 16 (or a mortise 161). The left side wall block 7 is connected to the left top plate 9 by mortise and tenon joints. The left side wall block 7 is provided with a tenon 16 (or a mortise 161). The left top plate 9 is provided with a tenon 16 (or a mortise 161). The right side wall block 8 is connected to the right top panel 10 through mortise and tenon, and the right side wall block 8 is provided with a tenon 16 (or mortise 161), and the right top panel 10 is provided with a mortise 161 (or tenon 16) that matches the tenon 16 (or mortise 161). The top of the left top panel 9 and the right top panel 10 are connected through mortise and tenon, and the left top panel 9 is provided with a tenon 16 (or mortise 161), and the right top panel 10 is provided with a mortise 161 (or tenon 16) that matches the tenon 16 (or mortise 161). The mortise and tenon connection is convenient for construction, and the parts connection has high stability and durability.

[0027] Example 2

[0028] See attached Figure 1-3 The difference between this embodiment and embodiment 1 is that an expansion waterstop strip 11 is provided at the connection between the bottom plate 6 and the left wall block 7, and an expansion waterstop strip 11 is provided at the connection between the bottom plate 6 and the right wall block 8. The expansion waterstop strip 11 blocks the gap at the connection to prevent water leakage. Preferably, a geotextile 12 is laid on the outside of the concrete layer 2, and the geotextile 12 can filter mud and sand.

[0029] Specifically, the annular tube 5 is provided with longitudinal straight bolt holes 13. After the splicing of one ring is completed, round hole bolts are inserted into the radial section for anchoring, so as to facilitate the alignment of two adjacent annular tubes 5.

[0030] Specifically, the annular tube 5 is provided with bent bolt connection holes 14 for connecting in the annular direction and in the axial direction with bent bolts during splicing.

[0031] Specifically, the bottom plate 6, the left wall block 7 and the right wall block 8 are made of C25 reinforced concrete. The bottom plate 6, the left wall block 7 and the right wall block 8 play the role of a supporting structure in the present application. C25 reinforced concrete has the advantages of strong bearing capacity, simple construction process and good durability.

[0032] Specifically, the left top plate 9 and the right top plate 10 are made of high-strength permeable concrete and embedded FRP bars. The left top plate 9 and the right top plate 10 are at the top of the drainage hole, and are mainly used for support and drainage. Good drainage performance is required. High-strength permeable concrete has the characteristics of permeability and shock absorption, can pass water and reduce vibration, and FRP bars are used instead of ordinary steel bars to avoid rust.

[0033] Specifically, the annular tube 5 is provided with a rubber cushion layer 15 in the annular direction, which is used to play a buffering role when the annular tube 5 is spliced.

[0034] Construction principle: During the construction of the drainage tunnel, the tunnel is excavated manually or by machine. After the surface is polished and smooth, the geotextile 12 is laid along the top arch of the excavated cavern and the inner wall of the side walls on both sides to filter the sediment. Then, the prefabricated drainage tunnel components are spliced. First, the bottom plate 6 is placed by a mechanical arm or manually, and then the left wall block 7, the right wall block 8, the left top plate 9 and the right top plate 10 are spliced ​​in the order of right first, left second, bottom first, and top last. The ring pipe 5 in construction is spliced ​​with five pieces, and each completed ring After splicing, insert round hole bolts into the radial section for anchoring, and place the expansion water stop strip 11 at the junction of the side wall and the bottom plate 6; the rubber cushion layer 15 is pasted in the circumferential direction of the component, and 5% to 6% of the inner diameter is set as the ring tube thickness; the curved bolt connection hole 14 is reserved in the arch part so that curved bolts can be used for circumferential and axial connection respectively during splicing; the capillary drainage belt 3 is arranged on the inner wall of the cavern, and gravity is used to guide the water to the drainage channel 4. When the flow rate is small, the excess water is quickly discharged through the drainage channel 4, and when the flow rate is large, the cave body 1 is used for drainage.

[0035] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. The protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A permeable concrete small-section drainage hole structure, comprising a hole body, characterized in that: The hole body comprises a concrete layer, a capillary drainage belt is arranged inside, drainage channels are arranged on both sides of the lower inner side of the hole body, the capillary drainage belt is connected to the drainage channels, and the material of the concrete layer is permeable concrete.

2. A permeable concrete small-section drainage hole structure according to claim 1, characterized in that: The outer side of the concrete layer is paved with a geotextile.

3. A permeable concrete small-section drainage hole structure according to claim 1, characterized in that: The hole body includes a plurality of annular tubes, and adjacent annular tubes are connected by bolts and mortise and tenon joints.

4. A permeable concrete small-section drainage hole structure according to claim 3, characterized in that: The annular tube includes a bottom plate, a left wall block, a right wall block, a left top plate and a right top plate. The left and right sides of the bottom plate are respectively connected to the left wall block and the right wall block by mortise and tenon joints, the left wall block is connected to the left top plate by mortise and tenon joints, the right wall block is connected to the right top plate by mortise and tenon joints, and the top ends of the left top plate and the right top plate are connected by mortise and tenon joints.

5. A permeable concrete small-section drainage hole structure according to claim 4, characterized in that: An expansion water stop strip is provided at the connection between the bottom plate and the left wall block, and the expansion water stop strip is provided at the connection between the bottom plate and the right wall block.

6. A permeable concrete small-section drainage hole structure according to claim 3, characterized in that: The annular tube is provided with longitudinal straight bolt holes.

7. A permeable concrete small-section drainage hole structure according to claim 3 or 6, characterized in that: The annular pipe is provided with bent bolt connection holes.

8. A permeable concrete small-section drainage hole structure according to claim 4, characterized in that: The bottom plate, the left wall block and the right wall block are made of C25 reinforced concrete.

9. A permeable concrete small-section drainage hole structure according to claim 4, characterized in that: The left top plate and the right top plate are made of high-strength permeable concrete and pre-embedded FRP bars.

10. A permeable concrete small-section drainage hole structure according to claim 3, characterized in that: The annular tube is provided with a rubber cushion layer.

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