Reinforced drainage composite structure for side slope and side slope
By designing a wavy reinforced drainage composite structure and using the arch structure and geotextile to protect the reinforced layer, the problems of insufficient pull resistance and easy damage of the reinforced drainage composite structure in the prior art are solved, and higher bearing capacity and drainage efficiency are achieved, and the stability of the slope is enhanced.
Patent Information
- Application Number
- CN202422535230.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The existing reinforced drainage composite structure has insufficient pull resistance, low structural strength, easy to be punctured, and the drainage plate is easily crushed, resulting in a degradation of reinforcement effect and drainage performance.
A wavy reinforced drainage composite structure is adopted, including a wavy drainage plate and two wavy reinforced composite layers. The drainage tank is located at the trough of the drainage plate, and the reinforced layer is sandwiched between the two layers of geotextiles to form an arch structure to enhance bending and pulling resistance, and protect the reinforced layer through the geotextile.
The bearing capacity, reinforcement effect and drainage effect of the reinforced drainage composite structure are improved, the tension resistance and plastic deformation resistance are enhanced, the reinforced layer and drainage plate are prevented from damage, and the stability and drainage efficiency of the slope are improved.
Smart Images
Figure CN223214588U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of geotechnical engineering slope reinforcement and drainage, and particularly relates to a reinforced drainage composite structure for a slope and the slope. Background Art
[0002] Currently, two technologies are commonly used for slope drainage. One involves constructing drainage facilities above and below ground. Through the coordinated operation of side ditches, drains, culverts, and seepage wells, rainwater, slope runoff, and meltwater are channeled and discharged away from the slope. The other involves specially designing the slope structure itself, installing drainage layers within the slope. Furthermore, embankment construction often uses reinforcing materials such as geogrids and geotextiles to reinforce the embankment.
[0003] The reinforced drainage composite structure of the existing technology includes a planar drainage layer and reinforced layers arranged on opposite sides of the drainage layer. This structure mainly has the following defects: First, the drainage structure occupies space and reduces the reinforcement effect; second, when the reinforced drainage composite structure is covered with a soil layer or the construction load is large, the drainage layer with poor plastic deformation ability may be damaged and lose its drainage function; third, during transportation or construction, the reinforced layer is easily punctured and damaged, resulting in wear and breakage of the reinforcement material or the entry of particles such as sand and gravel into the drainage channel, reducing the drainage performance. Utility Model Content
[0004] The purpose of the utility model is to provide a wavy reinforced drainage composite structure, which can solve the problems of the existing reinforced drainage composite structure such as insufficient tensile strength, low structural strength, easy puncture, and easy crushing of drainage boards. It has the advantages of strong bearing capacity, good reinforcement effect, and good drainage effect.
[0005] To achieve the above-mentioned object, the present invention provides a reinforced drainage composite structure for a slope, wherein the reinforced drainage composite structure is a wave-shaped structure, comprising:
[0006] A drain board, comprising a wave-shaped drain board body and a plurality of drain grooves formed inwardly from an upper surface of the drain board body, wherein the plurality of drain grooves are respectively provided at each trough of the drain board body;
[0007] Two layers of reinforced composite layers are respectively attached to opposite sides of the drainage board body and connected to the drainage board body along the thickness direction of the drainage board body. The reinforced composite layers are wavy and are spaced apart from the bottom of the drainage trough.
[0008] In a specific embodiment, the wavy structure of the drainage board body is composed of a plurality of units of the same size and shape and arranged periodically.
[0009] In a specific embodiment, the dimensional information of the wavy structure of the drainage board body includes: the trough arc radius is 5cm~8cm, the peak arc radius is greater than or equal to the trough arc radius, and the difference between the peak arc radius and the trough arc radius is 0cm~3cm.
[0010] In a specific embodiment, the ratio of the depth of the drainage groove to the thickness of the drainage board body is 1 / 3 to 1 / 2, and the ratio of the width of the drainage groove to the radius of the trough arc is 1 / 2 to 1.
[0011] In a specific embodiment, the reinforced composite layer includes a reinforcement layer spaced apart from the drainage board body, a first geotextile sandwiched between the drainage board body and the reinforcement layer, and a second geotextile arranged on the side of the reinforcement layer away from the drainage board body.
[0012] In a specific embodiment, the second geotextile includes a main body portion covering the reinforcement layer and an extension portion bent and extended from the main body portion toward the slope surface, wherein the extension portion covers the slope surface.
[0013] In a specific embodiment, the reinforcement layer and the first layer of geotextile, and the reinforcement layer and the second layer of geotextile are compounded by any one of suturing, gluing and needling.
[0014] In a specific embodiment, the drainage board body and the first geotextile are connected by any one of adhesives, hot adhesives and hot melt adhesives.
[0015] In a specific embodiment, the drainage board body is made of plastic material.
[0016] The present invention also provides a slope, which includes a slope body and a plurality of reinforced drainage composite structures arranged at intervals along the height direction of the slope body. The reinforced drainage composite structure is the reinforced drainage composite structure described above, wherein the extension direction of the drainage groove is the same as the width direction of the slope body, and the reinforced drainage composite structure is arranged to be inclined downward from the relative direction of the slope surface to the slope surface direction.
[0017] The beneficial effects of the present invention include at least:
[0018] 1. In the present invention, the reinforced drainage composite structure includes a wavy drainage board and two layers of wavy reinforced composite layers. Along the thickness direction of the drainage board, the two layers of the reinforced composite layers are respectively attached to the opposite sides of the drainage board and connected to the drainage board, and a drainage groove is provided at each trough of the drainage board; in the present invention, the reinforced drainage composite structure is wavy as a whole, which increases the moment of inertia of the cross section, improves the bending resistance, and can reduce the vertical deflection of the reinforced drainage composite structure, thereby ensuring to the maximum extent that it is not damaged by pressure; at the same time, the unit of the wavy structure is an arch structure, which can increase the bearing capacity and improve the strength of the reinforced drainage composite structure.
[0019] 2. The reinforced drainage composite structure of the present invention is provided with a reinforced composite layer on both sides of the drainage layer, which can enhance the ability of the reinforced drainage composite structure to resist plastic deformation and has the function of protecting the drainage board.
[0020] 3. The reinforced composite layer includes a reinforced layer spaced apart from the drainage board body, a first geotextile sandwiched between the drainage board body and the reinforced layer, and a second geotextile arranged on the side of the reinforced layer away from the drainage board body; in this way, the reinforced layer is sandwiched between the first geotextile and the second geotextile, that is, it is wrapped by two layers of geotextiles. On the one hand, the first geotextile and the second geotextile can fix and protect the reinforced layer, prevent the reinforced layer and the drainage board from being damaged by sharp foreign objects, and improve the overall strength and bursting strength of the reinforced drainage composite structure. On the other hand, the first geotextile and the second geotextile can also filter coarse particles carried in the soil water, prevent the coarse particles from entering the drainage trough of the drainage board, clogging the drainage trough, and causing a decrease in drainage effect.
[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 A schematic diagram of a partial three-dimensional structure of a reinforced drainage composite structure provided by an embodiment of the present utility model;
[0023] Figure 2 A cross-sectional view of a reinforced drainage composite structure in one direction provided by an embodiment of the present utility model;
[0024] Figure 3 A cross-sectional view of the reinforced drainage composite structure provided by one embodiment of the present utility model in another direction;
[0025] Figure 4 A schematic structural diagram of a slope equipped with a reinforced drainage composite structure provided in one embodiment of the present invention. DETAILED DESCRIPTION
[0026] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention can be defined and covered by various different implementations according to the claims.
[0027] like Figures 1 to 3 As shown, the utility model provides a reinforced drainage composite structure 100 for slopes. The reinforced drainage composite structure is a wave-shaped structure. When installed on the slope, it can increase the contact surface area with the slope soil, and substantially improve the slope stability (safety factor, critical height).
[0028] The reinforced drainage composite structure 100 includes a wavy drainage board 10 and two layers of wavy reinforced composite layers 20. Along the thickness direction of the drainage board 10, the two layers of reinforced composite layers 20 are respectively attached to the opposite sides of the drainage board 10 and connected to the drainage board 10.
[0029] The reinforced drainage composite structure 100 provided by the present invention uses a wavy drainage board as the drainage layer, and uses it as the base, and covers the reinforced composite layer on the opposite sides of the drainage board respectively to ensure that the entire reinforced drainage composite structure is wavy. Compared with the planar structure, it not only increases the contact surface area between the reinforced drainage composite structure and the soil per unit width, enhances the friction effect between the reinforced drainage composite structure and the soil, and improves the overall tensile strength of the reinforced composite board; and utilizes the arch unit to increase the cross-sectional inertia moment to achieve the purpose of improving the bending resistance and reducing bending deformation, and the arch unit also helps to improve the bearing capacity of the reinforced drainage composite structure.
[0030] The drain board 10 includes a wavy drain board body 11 and a plurality of drain grooves 12 formed inwardly from the upper surface of the drain board body 11. The plurality of drain grooves 12 are respectively arranged at each trough of the drain board body 11. The reinforced composite layer 20 is spaced apart from the bottom of the drain groove 12 and the reinforced composite layer 20 is connected to the drain board body 11.
[0031] In this embodiment, the upper surface of the drain board body refers to the surface of the drain board body facing the top of the slope when the drain board body is applied to a slope.
[0032] In the present utility model, the drainage board body 11 is made of plastic material.
[0033] Preferably, the plastic material is one or a mixture of two or more of polyethylene, polyvinyl chloride, polypropylene, polystyrene, and EVA resin.
[0034] The drainage board body 11 is made of plastic material, which avoids the use of non-renewable resources such as sand, gravel and other non-renewable resources in traditional drainage layers, is beneficial to environmental protection and sustainable development; at the same time, it also reduces engineering costs and saves money.
[0035] Preferably, the wavy structure of the drainage board body 11 is composed of a plurality of units of the same size and shape and arranged periodically.
[0036] More preferably, the dimensional information of the wavy structure of the drainage board body 11 includes: the trough arc radius is 5cm~8cm, the peak arc radius is greater than or equal to the trough arc radius, and the difference between the peak arc radius and the trough arc radius is 0cm~3cm.
[0037] In the present invention, the drainage board body adopts the above-mentioned dimensional information to ensure that the reinforced composite layer attached to the opposite sides of the drainage board body also maintains a relatively obvious wave shape, giving full play to the advantages of tensile strength, bending resistance, strength, bearing capacity, etc. brought by the wave shape; and the radius of the crest arc is greater than or equal to the radius of the trough arc, which can ensure that the free water in the slope can flow from the crest into the drainage trough at the trough.
[0038] Preferably, the drainage groove 12 is a U-shaped groove.
[0039] Preferably, the ratio of the depth of the drainage groove 12 to the thickness of the drainage board body is 1 / 3 to 1 / 2, and the ratio of the width of the drainage groove to the radius of the trough arc is 1 / 2 to 1.
[0040] In the present invention, the reinforced composite layer 20 is a wave-shaped structure.
[0041] The reinforced composite layer 20 is wavy, which increases the contact surface area with the soil per unit width, thereby improving the friction performance between the reinforced composite layer and the soil, which is equivalent to enhancing the tensile strength of the reinforced drainage composite structure, improving the reinforcement effect, and enhancing the slope stability.
[0042] Preferably, the reinforced composite layer 20 includes a reinforcement layer 21 spaced apart from the drainage board body 10, a first geotextile 22 sandwiched between the drainage board body 11 and the reinforcement layer 21, and a second geotextile 23 arranged on the side of the reinforcement layer 21 away from the drainage board body 11.
[0043] In the present invention, the reinforcement layer is sandwiched between the first geotextile and the second geotextile, that is, it is wrapped by two layers of geotextiles. On the one hand, the first geotextile and the second geotextile can fix and protect the reinforcement layer, prevent the reinforcement layer and the drainage board from being damaged by sharp foreign objects, and improve the overall strength and bursting strength of the reinforced drainage composite structure. On the other hand, the first geotextile and the second geotextile can also filter the coarse particles carried in the soil water, prevent the coarse particles from entering the drainage trough of the drainage board, clogging the drainage trough, and causing the drainage effect to decrease.
[0044] Preferably, the reinforcement layer 21 is a grid structure formed by interweaving warp threads and weft threads, and the warp threads and weft threads are connected and fixed at their intersections by means of stitching, acupuncture, etc.
[0045] In the present invention, by setting a reinforcement layer, the ability of the reinforced drainage composite structure to resist plastic deformation can be improved, which has the function of protecting the drainage board; at the same time, the warp and weft of the reinforcement layer are connected and fixed at the intersection by stitching, acupuncture, etc., which can avoid the mutual displacement between the warp and weft, affecting the overall tensile strength of the reinforcement.
[0046] Preferably, the side length of the grid structure is 0 to 5 cm.
[0047] Preferably, the second geotextile 23 includes a main body 231 covering the reinforcement layer 21 and an extension 232 bent and extended from the main body 231 toward the slope surface, wherein the extension 232 covers the slope surface.
[0048] In the present invention, when the reinforced drainage composite structure is applied to the slope, humus or backfill can be covered on the extension part 232 and vegetation can be planted to form a biological protection layer; in this way, on the one hand, the free water of the slope discharged from the drainage trough can be absorbed to prevent the discharged water from seeping back through the slope surface, and the transpiration of the vegetation can be used to absorb the capillary water in the soil near the slope surface; on the other hand, the biological protection layer formed by the vegetation, the extension part and the covering soil on the extension part can prevent the slope erosion caused by precipitation and enhance the stability of the slope.
[0049] Preferably, the reinforcement layer 21 and the first layer of geotextile 22, and the reinforcement layer 21 and the second layer of geotextile 23 are compounded by any one of suturing, gluing and needling.
[0050] In this embodiment, the reinforcement layer 21 and the first layer of geotextile 22 , and the reinforcement layer 21 and the second layer of geotextile 23 are compounded by needle punching.
[0051] Preferably, the drainage board body 11 and the first geotextile 22 are connected by any one of adhesives, hot adhesives and hot melt adhesives.
[0052] In this embodiment, the drainage board body 11 and the first geotextile 22 are connected by hot melt adhesive.
[0053] See also Figure 4The present invention also provides a slope 200, which includes a slope body 201 and a plurality of reinforced drainage composite structures 100 arranged at intervals along the height direction of the slope body 201. The extension direction of the drainage groove is the same as the width direction of the slope body 201, wherein the reinforced drainage composite structure 100 is arranged to be inclined downward from the relative direction of the slope surface to the slope surface direction.
[0054] In the present invention, the arrangement direction of the multiple units of the drainage board body is the first direction, which is the same as the extension direction of the slope; the extension direction of the drainage groove is the second direction, which is the same as the width direction of the slope.
[0055] In the present invention, the reinforced drainage composite structure 100 is tilted downward, so that the drainage trough is also tilted downward, so that the water in the drainage trough can be discharged to the slope surface by gravity and provide a water source for the biological protection layer set on the slope surface.
[0056] Preferably, the inclination angle of the reinforced drainage composite structure 100 is 2° to 7°, and more preferably, the inclination angle of the reinforced drainage composite structure 100 is 5°.
[0057] Preferably, the slope 200 further includes a biological protection layer 203 arranged on the slope surface.
[0058] Example
[0059] The reinforced drainage composite structure 100 provided by the present invention is applied to the slope 200, and the layout diagram is as follows: Figure 4 shown.
[0060] In this embodiment, the parameters of the slope are as follows: slope height of 8 m, slope gradient of 1:1, soil density of 19 kN / m 3 , soil cohesion of 24 kPa, and soil internal friction angle of 28.6°.
[0061] In this embodiment, the parameters of the reinforced drainage composite structure include:
[0062] The dimensional information of the wavy drainage board (plastic material) is as follows: the arc radius of the trough is 5.5cm, the arc radius of the crest is 6cm, the height difference between the crest and the trough is 5cm, and the spacing between two adjacent crests (troughs) is 19.2cm; the thickness of the drainage board is 2cm, and the drainage groove is 1cm deep and 3.6cm wide.
[0063] The parameters of the reinforcement layer include: the mesh size is 2 cm, the allowable tensile strength design value per unit width of the reinforcement mesh is assumed to be 60 kN / m, and the vertical spacing of the reinforcement layer is 2 m.
[0064] In this embodiment, the longitudinal section of the slope is in the shape of a right-angled trapezoid. From the right-angled side to the hypotenuse, the reinforced drainage composite structure is inclined downward with an inclination angle of 5°.
[0065] In this embodiment, the second layer of geotextile is extended and arranged along the slope, and humus or fill soil is covered on the extended section, and vegetation adapted to the local climate is planted on the cover soil. The root system should not be too developed, and mainly local evergreen herbaceous plants are used. On-site transplanting of turf, pre-embedding of grass seeds in geobags, etc. can be used to form a biological protection layer 203.
[0066] In order to conduct a more intuitive comparative analysis, another planar reinforced drainage composite structure with the same width and thickness was selected. Under the above slope parameter conditions, the slope stability indicators such as slope safety factor, critical height, and overlying ultimate load were calculated respectively. The calculation theory adopted the limit analysis upper limit method. The calculation results are shown in Table 1.
[0067] Table 1 Comparative analysis of the wavy reinforced drainage composite structure and the planar reinforced drainage composite structure provided in this embodiment when applied to the slope
[0068] Calculation Object Safety factor Critical height (m) Overburden ultimate load (kPa) Wave-shaped reinforced drainage composite structure 2.8896 9.1273 13.4395 Planar reinforced drainage composite structure 2.7726 8.9237 11.0123
[0069] It should be noted that the safety factor calculation in Table 1 is based on the logarithmic spiral slip surface and adopts the strength reduction method; the critical height and upper cover ultimate load are calculated based on the 0.3H method slip surface.
[0070] From Table 1 we can see that:
[0071] 1. Compared with a planar reinforced drainage composite structure of the same size, the wavy reinforced drainage composite structure provided by the present invention has a safety factor increased by 4.2% and a critical height increased by 2.3%; that is, the use of the wavy reinforced drainage composite structure can substantially improve the stability of the slope.
[0072] 2. The wavy reinforced drainage composite structure provided by the present invention has an overlying ultimate load increased by 22% compared to a planar reinforced drainage composite structure of the same size and specification; that is, the ultimate bearing capacity of the wavy reinforced drainage composite structure is significantly improved, and the above calculation has not taken into account the bearing capacity addition brought by the arched unit drainage board, and the actual improvement effect will be higher than 22%.
[0073] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, several simple deductions and substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the scope of protection of the present invention.
Claims
1. A reinforced drainage composite structure for slopes, characterized in that: The reinforced drainage composite structure is a wavy structure, which includes: A drain board, comprising a wave-shaped drain board body and a plurality of drain grooves formed inwardly from an upper surface of the drain board body, wherein the plurality of drain grooves are respectively provided at each trough of the drain board body; Two layers of reinforced composite layers are respectively attached to opposite sides of the drainage board body and connected to the drainage board body along the thickness direction of the drainage board body. The reinforced composite layers are wavy and are spaced apart from the bottom of the drainage trough.
2. The reinforced drainage composite structure according to claim 1, characterized in that: The wavy structure of the drainage board body is composed of a plurality of units of the same size and shape and arranged periodically.
3. The reinforced drainage composite structure according to claim 2, characterized in that: The dimensional information of the wavy structure of the drainage board body includes: the trough arc radius is 5cm~8cm, the crest arc radius is greater than or equal to the trough arc radius, and the difference between the crest arc radius and the trough arc radius is 0cm~3cm.
4. The reinforced drainage composite structure according to claim 3, characterized in that: The ratio of the depth of the drainage groove to the thickness of the drainage board body is 1 / 3 to 1 / 2, and the ratio of the width of the drainage groove to the radius of the trough arc is 1 / 2 to 1.
5. The reinforced drainage composite structure according to claim 1, characterized in that: The reinforced composite layer includes a reinforcement layer spaced apart from the drainage board body, a first geotextile sandwiched between the drainage board body and the reinforcement layer, and a second geotextile arranged on a side of the reinforcement layer away from the drainage board body.
6. The reinforced drainage composite structure according to claim 5, characterized in that: The second geotextile includes a main body portion covering the reinforcement layer and an extension portion bent and extended from the main body portion toward the slope surface, wherein the extension portion covers the slope surface.
7. The reinforced drainage composite structure according to claim 5, characterized in that: The reinforcement layer and the first geotextile are compounded together, and the reinforcement layer and the second geotextile are compounded together by any one of a suturing method, a gluing method and a needle punching method.
8. The reinforced drainage composite structure according to any one of claims 5 to 7, characterized in that: The drainage board body and the first geotextile are connected by any one of adhesives, hot adhesives and hot melt adhesives.
9. The reinforced drainage composite structure according to claim 1, characterized in that: The drainage board body is made of plastic material.
10. A slope, characterized in that: The slope includes a slope body and a plurality of reinforced drainage composite structures arranged at intervals along the height direction of the slope body. The reinforced drainage composite structure is the reinforced drainage composite structure described in any one of claims 1 to 9, wherein the extension direction of the drainage groove is the same as the width direction of the slope body, and the reinforced drainage composite structure is arranged to be inclined downward from the relative direction of the slope surface to the direction of the slope surface.