Loess foundation slope protection drainage structure

Abstract

The utility model discloses a loess foundation revetment drainage structure which comprises a revetment laid on a loess foundation and a plurality of stair platforms built on the revetment, each stair platform is provided with a drainage groove, and a water seepage drainage device with one end inserted into the loess foundation is arranged in each drainage groove. A water draining slope with a water draining groove is arranged on one side of the stair platform, the water draining groove is communicated with the water draining grooves, a water draining outlet is formed in the bottom of the water draining slope, and the bottom end of the water draining groove extends into the water draining outlet. The loess foundation slope protection structure has good drainage performance and can discharge redundant water in loess foundation soil, so that slope protection landslide is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy facilities, and particularly relates to a slope protection drainage structure for loess foundation. Background Technique

[0002] In the river section where the bridge site is located, the concave bank of the river bank is eroded by the water flow year by year, which will cause the river bank to collapse continuously. To protect the safety of the bridge and the embankment, it is necessary to slope protect the concave bank. Slope protection refers to various paving and planting on the slope surface to prevent the slope from being scoured.

[0003] Chinese Patent with application number CN202310051270.4 discloses a slope protection structure, which greatly improves the connection strength between the slope protection structure and the slope body, and ensures the protection effect of the slope protection structure on the slope body. However, it does not have the function of draining the soil of the slope protection foundation, and cannot drain the excess surface water and groundwater in the soil, increasing the risk of landslide, and may further cause the failure of the slope protection structure. Content of the Utility Model

[0004] The purpose of the utility model is to provide a slope protection drainage structure for loess foundation with good drainage performance and capable of draining the excess water in the loess foundation soil.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A slope protection drainage structure for loess foundation includes a slope protection laid on the loess foundation and several stair platforms built on the slope protection. Drainage grooves are arranged on each stair platform, and a seepage drainage device with one end inserted into the loess foundation is arranged in the drainage groove; A water outlet slope with a water outlet groove is arranged on one side of the stair platform. The water outlet groove is communicated with multiple drainage grooves. A water outlet is arranged at the bottom of the water outlet slope, and the bottom end of the water outlet groove extends into the water outlet; The seepage drainage device includes a water pipe plug inserted into the loess foundation, a seepage pipe and a drainage pipe connected to the water pipe plug in sequence. The seepage pipe extends into the loess foundation and multiple groups of seepage holes are arranged on the seepage pipe. A drainage connection block is arranged at the connection between the drainage pipe and the seepage pipe; A sealing connection ring and a connection convex block are arranged at the junction of the seepage pipe and the drainage pipe in the drainage connection block. A valve core connection block is connected to the lower part of the connection convex block through a connection shaft. A one-way valve core is connected to one side of the valve core connection block close to the sealing connection ring, and the one-way valve core and the sealing connection ring are mutually embedded.

[0007] Further, the outer side of the seepage pipe is wrapped with geotextile.

[0008] Further, a support connection block is arranged at the bottom of the drainage connection block.

[0009] Further, a connecting protrusion for connecting with the support connecting block to support the seepage drainage device is arranged on one side of the drainage groove close to the loess foundation.

[0010] Further, a drainage filter baffle is arranged in the drainage groove.

[0011] Further, a sewage filter baffle is arranged in the sewage groove.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] By arranging drainage grooves on several stair platforms of the slope protection and a sewage slope and a sewage groove on one side of the stair platform, and discharging the excess water in the soil to the drainage groove through the seepage drainage device, connecting the drainage groove with the sewage groove for drainage, and finally discharging the water in the sewage groove through the sewage drain outlet, the utility model has good drainage performance, can discharge the water on the slope protection and the excess water in the soil, thus avoiding the landslide of the slope protection and ensuring the stability and safety of the structure.

[0014] Further, for the seepage drainage device of the utility model, by arranging the seepage pipe and the drain pipe, the water in the soil first seeps into the seepage pipe through the seepage holes, and the seepage pipe discharges the water to the drain pipe, and finally flows into the drainage groove for discharge. And the outside of the seepage pipe is wrapped with geotextile, which can prevent the seepage holes on the seepage pipe from being blocked by soil or gravel.

[0015] Further, by arranging a one-way valve core and a sealing connection ring in the drainage connection block, when water passes through the drainage connection block, it first reaches the sealing connection ring and pushes the one-way valve core to open to form a passage, so that the water can flow towards the drainage groove. When there is no water flowing in the drainage connection block towards the drainage groove, the one-way valve core is buckled in the sealing connection ring to prevent the water in the drainage groove from flowing back into the seepage drainage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the utility model;

[0017] Figure 2 is a schematic structural diagram of the drainage groove of the utility model;

[0018] Figure 3 is a schematic structural diagram of the seepage drainage device of the utility model;

[0019] Figure 4 is a sectional view of the seepage drainage device of the utility model;

[0020] In the figure: 1 - loess foundation; 2 - slope protection; 3 - staircase landing; 4 - drainage trough; 41 - drainage filter baffle; 42 - connecting protrusion; 5 - downslope; 51 - downslope drainage outlet; 6 - downspout; 61 - downspout filter baffle; 7 - seepage drainage device; 71 - drain pipe; 72 - seepage pipe; 721 - seepage holes; 73 - drainage connection block; 731 - support connection block; 732 - connecting lug; 733 - valve core connection block; 734 - connecting shaft; 735 - one-way valve core; 736 - sealing connection ring; 74 - water pipe plug; 75 - geotextile. Detailed implementation mode

[0021] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] As Figure 1 、 2 shown, a slope protection drainage structure for a loess foundation according to this implementation mode includes a slope protection 2 laid on a loess foundation 1 and a plurality of staircase landings 3 built on the slope protection 2. A drainage trough 4 is provided on each staircase landing 3. The drainage trough 4 is trapezoidal in reverse, and a drainage filter baffle 41 and a seepage drainage device 7 with one end inserted into the loess foundation 1 are provided in the drainage trough 4; a connecting protrusion 42 for supporting the seepage drainage device 7 is provided on one side of the drainage trough 4 close to the loess foundation 1. A downslope 5 with a downspout 6 is provided on one side of the staircase landing 3. A downslope drainage outlet 51 is provided at the bottom of the downslope 5. The downspout 6 is communicated with a plurality of drainage troughs 4, and a downspout filter baffle 61 is provided in the downspout 6, and the bottom end of the downspout 6 extends into the downslope drainage outlet 51.

[0023] When it rains, the slope protection 2 drains water through the drainage troughs 4 on the staircase landings 3 and the downspouts 6 on the downslopes 5, and the water in the drainage troughs 4 flows into the downspouts 6 for drainage. When rainwater or water flowing down from the slope protection 2 enters the drainage trough 4, the large-particle impurities are filtered outside the drainage trough 4 by the drainage filter baffle 41, and the filtered water converges into the downspout 6 for drainage; and when the water enters the downspout 6, the large-particle impurities are filtered outside the downspout 6 by the downspout filter baffle 61, and finally the water in the downspout 6 is discharged from the slope protection 2 through the downslope drainage outlet 51.

[0024] As Figure 3 、 4As shown in the figure, the seepage drainage device 7 includes a water pipe plug 74 inserted into the loess foundation 1, a seepage pipe 72 and a drainage pipe 71 connected to the water pipe plug 74 in sequence. A drainage connection block 73 is provided at the connection between the drainage pipe 71 and the seepage pipe 72. A support connection block 731 connected to the connection protrusion 42 is provided at the bottom of the drainage connection block 73; the seepage pipe 72 extends into the loess foundation 1. A plurality of groups of seepage holes 721 are formed in the seepage pipe 72, and a geotextile 75 is wrapped outside the seepage pipe 72. The geotextile 75 is a water-permeable geosynthetic material made of synthetic fibers by needle punching or weaving, which can prevent soil or sand from blocking the seepage holes 721 on the seepage pipe 72. The seepage drainage device 7 is inserted into the loess foundation 1 through the water pipe plug 74. The water in the soil first penetrates into the seepage pipe 72 through the geotextile 75 and the seepage holes 721, and the seepage pipe 72 drains the water to the drainage pipe 71, and then the drainage pipe 71 drains the water into the drainage groove 4.

[0025] A sealing connection ring 736 and a connection protrusion 732 are provided at the junction of the seepage pipe 72 and the drainage pipe 71 in the drainage connection block 73. A valve core connection block 733 is connected below the connection protrusion 732 through a connection shaft 734. A one-way valve core 735 is connected to one side of the valve core connection block 733 close to the sealing connection ring 736. The one-way valve core 735 and the sealing connection ring 736 are mutually engaged.

[0026] The seepage drainage device 7 is connected to the connection protrusion 42 of the drainage groove 4 through the support connection block 731. When the discharged water passes through the drainage connection block 73, it first reaches the sealing connection ring 736 and pushes the one-way valve core 735. The one-way valve core 735 rotates at the connection protrusion 732 with the connection shaft 734 as the axis through the valve core connection block 733, so that the one-way valve core 735 opens to form a passage, enabling the water to flow towards the drainage groove 4; and when there is no water flowing in the drainage connection block 73 towards the drainage groove 4, the one-way valve core 735 is buckled in the sealing connection ring 736 to prevent the water in the drainage groove 4 from flowing back into the seepage drainage device 7.

[0027] Working principle: When using a loess foundation slope protection drainage structure, the geotextile 75 is wrapped outside the seepage pipe 72, and then the seepage drainage device 7 is inserted into the loess foundation 1 through the water pipe plug 74, and a part of the seepage pipe 72 is in the soil of the loess foundation 1. The seepage drainage device 7 is connected to the connection protrusion 42 of the drainage groove 4 through the support connection block 731.

[0028] When it rains, the slope protection 2 drains water through the drainage grooves 4 on the stair landing 3 and the drainage grooves on the drainage slope 5, and the water in the drainage groove 4 flows into the drainage groove 6 for drainage. When rainwater or water flowing down from the slope protection 2 enters the drainage groove 4, large-particle impurities are filtered outside the drainage groove 4 by the drainage filter baffle 41, and the filtered water converges into the drainage groove 6 for drainage; when the water enters the drainage groove 6, large-particle impurities are filtered outside the drainage groove 6 by the drainage filter baffle 61, and finally the water in the drainage groove 6 is discharged from the slope protection 2 through the drainage outlet 51.

[0029] Excess water in the soil is discharged by the seepage drainage device 7. The water in the soil first seeps into the drain pipe 72 through the geotextile 75 from the seepage holes 721, and the drain pipe 72 drains the water to the drain pipe 71. When the water passes through the drainage connection block 73, it first reaches the sealed connection ring 736 and pushes the one-way valve core 735. The one-way valve core 735 rotates around the connection shaft 734 at the connection convex block 732 through the valve core connection block 733, so that the one-way valve core 735 opens to form a passage, enabling the water to flow towards the drainage groove 4; and when there is no water flowing in the drainage connection block 73 towards the drainage groove 4, the one-way valve core 735 is buckled in the sealed connection ring 736 to prevent the water in the drainage groove 4 from flowing back into the seepage drainage device 7.

Claims

1. A slope protection and drainage structure for loess foundation, characterized in that, It includes a slope protection (2) laid on a loess foundation (1) and several stair platforms (3) built on the slope protection (2). Drainage grooves (4) are provided on each stair platform (3), and a seepage drainage device (7) with one end inserted into the loess foundation (1) is arranged in the drainage groove (4); A drainage slope (5) with a drainage trough (6) is arranged on one side of the stair platform (3). The drainage trough (6) is communicated with a plurality of drainage grooves (4). A drainage outlet (51) is arranged at the bottom of the drainage slope (5), and the bottom end of the drainage trough (6) extends into the drainage outlet (51); The seepage drainage device (7) includes a water pipe plug (74) inserted into the loess foundation (1), a seepage pipe (72) and a drainage pipe (71) sequentially connected to the water pipe plug (74). The seepage pipe (72) extends into the loess foundation (1) and a plurality of seepage holes (721) are formed in the seepage pipe (72). A drainage connection block (73) is arranged at the connection between the drainage pipe (71) and the seepage pipe (72); A sealing connection ring (736) and a connection convex block (732) are arranged at the junction of the seepage pipe (72) and the drainage pipe (71) in the drainage connection block (73). A valve core connection block (733) is connected below the connection convex block (732) through a connection shaft (734). A one-way valve core (735) is connected to one side of the valve core connection block (733) close to the sealing connection ring (736). The one-way valve core (735) and the sealing connection ring (736) are mutually fitted; 2. The slope protection and drainage structure for loess foundation according to claim 1, characterized in that, A geotextile (75) is wrapped around the outside of the seepage pipe (72); 3. A slope protection and drainage structure for loess foundation according to claim 1, characterized in that, A support connection block (731) is arranged at the bottom of the drainage connection block (73); 4. A slope protection and drainage structure for loess foundation according to claim 3, characterized in that, A connection protrusion (42) for connecting with the support connection block (731) to support the seepage drainage device (7) is arranged on one side of the drainage groove (4) close to the loess foundation (1); 5. A slope protection and drainage structure for loess foundation according to any one of claims 1-4, characterized in that, A drainage filter baffle (41) is arranged in the drainage groove (4); 6. The slope protection and drainage structure for loess foundation according to claim 5, characterized in that A drainage filter baffle (61) is arranged in the drainage trough (6);

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