Expansive soil slope structure
Patent Information
- Application Number
- CN202521933769.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-09-09
AI Technical Summary
[0005]本实用新型的主要目的在于提供一种膨胀土边坡结构，旨在解决膨胀土难以应用于机场高填方边坡填筑的问题
[0016]本实用新型提供一种膨胀土边坡结构，通过设置顶部加筋土工格栅、顶部隔水土工布、边坡加筋土工格栅、高强度土工格室等设施，实现膨胀土在机场高填方边坡的应用，保障工程安全的同时实现膨胀土的有效利用，具有较大的直接经济效益。
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Figure CN224799526U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of airport slope protection technology, and in particular to an expansive soil slope structure. Background Technology
[0002] Expansive soil, also known as expansive-shrinking soil, is a type of cohesive soil that expands dramatically in volume when soaked in water and shrinks significantly in volume when dehydrated.
[0003] my country has a vast territory, and expansive soil is widely distributed. Its properties are significantly influenced by regional characteristics. Especially in the construction of many airports in the southwest region, engineering geological problems such as foundation settlement, structural cracking, and slope instability caused by expansive soil are common.
[0004] To avoid the recurring and long-term potential for disasters caused by expansive soil, the most common and safest treatment method in engineering is replacement. However, for high-fill airports, the earthwork volume can reach tens of millions of cubic meters. If measures such as complete replacement of the fill and disposal of excavated expansive soil are adopted, the earthwork investment will increase significantly. Therefore, it is very important to study the application of expansive soil in the construction of high-fill slopes for airports. Utility Model Content
[0005] The main purpose of this utility model is to provide an expansive soil slope structure, which aims to solve the problem that expansive soil is difficult to apply to airport high embankment slope construction.
[0006] To achieve the above objectives, this utility model provides an expansive soil slope structure for use in airport high-fill expansive soil slopes. The airport high-fill expansive soil slope includes a horizontal plane and a sloping plane, comprising: A reinforced geogrid is installed along the horizontal direction, and the reinforced geogrid is buried from the slope surface into the airport high fill expansive soil slope, and is installed corresponding to the horizontal plane. A top waterproof geotextile extends horizontally and is buried from the slope surface into the airport high fill expansive soil slope, and is set corresponding to the horizontal plane. A slope-reinforced geogrid is provided, extending horizontally. The slope-reinforced geogrid is embedded within the expansive soil slope of the airport high embankment, extending from the slope surface. Multiple slope-reinforced geogrids are provided, and they are spaced vertically at intervals along the extension direction of the slope surface. High-strength geocells are laid on the slope surface.
[0007] In one embodiment, multiple reinforced geogrids are provided, and the multiple reinforced geogrids are arranged at vertical intervals.
[0008] In one embodiment, a plurality of regular hexagonal grids are formed on the high-strength geocell, and a fixing steel nail is provided at the apex of at least one of the regular hexagonal grids. The nail part of the fixing steel nail is used to nail to the slope surface, and the regular hexagonal grid is used for backfilling with topsoil and planting grass.
[0009] In one embodiment, the top-reinforced geogrid has a reinforcing tensile strength greater than or equal to 80 kN / m, an extension length from the slope surface greater than or equal to 40 m, and a depth between it and the horizontal plane greater than or equal to 5 m; and / or, The depth between the top waterproof geotextile and the horizontal plane is 1.2m, and its extension length from the slope surface is greater than or equal to 10m; and / or, The reinforced tensile strength of the slope geogrid is greater than or equal to 40 kN / m, the spacing between multiple slope geogrids is 0.8 m, and the extension length from the slope surface is greater than or equal to 6 m; and / or, The high-strength geocell has a tensile yield strength greater than or equal to 23 MPa, a weld tensile strength greater than or equal to 15 kN / m, an edge tensile strength at the connection greater than or equal to 20 kN / m, an elongation of less than 15%, a grid size of 25 cm × 25 cm, and a height of 100 mm.
[0010] In one embodiment, the expansive soil slope structure further includes a walkway with a drainage ditch recessed in it. The walkway is located on the slope surface, dividing the slope surface vertically.
[0011] In one embodiment, the expansive soil slope structure further includes a drainage ditch extending horizontally, which is buried in the expansive soil slope of the airport high embankment corresponding to the horse trail, and connected to the horse trail drainage ditch.
[0012] In one embodiment, the drainage blind ditch and the horse path form a drainage group, and multiple drainage groups are provided. The multiple drainage groups are arranged at intervals in the extension direction of the slope surface, and are staggered along the adjacent drainage blind ditches in the vertical direction.
[0013] In one embodiment, a reverse filter geotextile is provided at the interface between the drainage blind ditch and the horse trail drainage ditch.
[0014] In one embodiment, the expansive soil slope structure further includes a toe wall, which is located at the bottom of the slope surface. The toe wall is a gravity retaining wall, and an internal drainage pipe is installed inside the toe wall. A filter geotextile is installed at the port of the internal drainage pipe facing the airport high embankment expansive soil slope.
[0015] In one embodiment, the expansive soil slope structure further includes a slope toe drainage ditch located at the bottom of the retaining wall.
[0016] This utility model provides a structure for expansive soil slopes. By setting up top reinforced geogrids, top waterproof geotextiles, slope reinforced geogrids, high-strength geocells, and other facilities, it enables the application of expansive soil in high embankment slopes of airports, ensuring project safety while achieving effective utilization of expansive soil, resulting in significant direct economic benefits. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the expansive soil slope structure provided in the embodiment of this utility model; Figure 2 yes Figure 1 Schematic diagram of the central horse track; Figure 3 yes Figure 1 Structural diagram of the central retaining wall; Figure 4 yes Figure 1 Schematic diagram of medium- and high-strength geocells.
[0018] Explanation of icon numbers: 100. Expansive soil slope structure; 1. Reinforced geogrid; 2. Top waterproof geotextile; 3. Slope reinforced geogrid; 4. High-strength geocell; 5. Drainage blind ditch; 6. Walkway; 61. Walkway drainage ditch; 7. Toe wall; 71. Internal drainage pipe; 8. Slope toe drainage ditch.
[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0023] Please see Figure 1 This utility model provides an expansive soil slope structure 100 for use on an expansive soil slope of a high embankment at an airport. The expansive soil slope includes a horizontal plane and a sloping plane, and includes a reinforced geogrid 1, a top waterproof geotextile 2, a slope reinforced geogrid 3, and high-strength geocells 4. The reinforced geogrid 1 extends horizontally and is embedded from the sloping plane into the expansive soil slope of the airport, corresponding to the horizontal plane. The top waterproof geotextile 2 extends horizontally... The top waterproof geotextile 2 extends from the slope surface into the airport high-fill expansive soil slope and is positioned corresponding to the horizontal plane; the slope reinforcement geogrid 3 extends horizontally and is embedded from the slope surface into the airport high-fill expansive soil slope. Multiple slope reinforcement geogrids 3 are provided, and multiple slope reinforcement geogrids 3 are arranged vertically and horizontally at intervals along the extension direction of the slope surface; the high-strength geocell 4 is laid on the slope surface.
[0024] This utility model provides a structure for expansive soil slopes. By setting up top reinforced geogrids, top waterproof geotextiles, slope reinforced geogrids, high-strength geocells, and other facilities, it enables the application of expansive soil in high embankment slopes of airports, ensuring project safety while achieving effective utilization of expansive soil, resulting in significant direct economic benefits.
[0025] Furthermore, multiple reinforced geogrids 1 are provided, and the multiple reinforced geogrids 1 are arranged at vertical intervals to ensure the bearing capacity of the reinforced geogrids 1 on the horizontal plane.
[0026] On the other hand, please see Figure 4The high-strength geocell 4 has multiple regular hexagonal grids formed on it, and at least one of the regular hexagonal grids has a fixing steel nail at its apex. The nail part of the fixing steel nail is used to nail it to the slope surface. The regular hexagonal grid is used to backfill with topsoil and plant grass. This is to ensure the strength of the slope surface and protect the slope surface.
[0027] In the embodiments provided by this utility model, the tensile strength of the top reinforced geogrid is greater than or equal to 80kN / m, the extension length from the slope surface is greater than or equal to 40m, and the depth between it and the horizontal plane is greater than or equal to 5m.
[0028] Similarly, the depth between the top waterproof geotextile and the horizontal plane is 1.2m, and the extension length from the slope surface is greater than or equal to 10m.
[0029] Similarly, the tensile strength of the slope reinforcement geogrid is greater than or equal to 40kN / m, the spacing between multiple slope reinforcement geogrids is 0.8m, and the extension length from the slope surface is greater than or equal to 6m.
[0030] Similarly, the high-strength geocell has a tensile yield strength greater than or equal to 23 MPa, a weld tensile strength greater than or equal to 15 kN / m, an edge tensile strength at the connection greater than or equal to 20 kN / m, an elongation of less than 15%, a grid size of 25 cm × 25 cm, and a height of 100 mm.
[0031] It should be noted that in this embodiment, the above features can coexist simultaneously or one of them can coexist. Obviously, the technical effect brought about by the simultaneous existence is the best, and no specific limitation is made here.
[0032] Please see Figure 2 On the other hand, the expansive soil slope structure 100 also includes a walkway 6, on which a drainage ditch 61 is recessed. The walkway 6 is located on the slope surface to divide the slope surface, so as to facilitate the collection of sewage.
[0033] Furthermore, the expansive soil slope structure 100 also includes a drainage ditch 5 extending horizontally, which is buried within the airport high-fill expansive soil slope corresponding to the horse trail 6, and connected to the horse trail drainage ditch 61, to facilitate the discharge of internal sewage.
[0034] In addition, the drainage blind ditch 5 and the horse path 6 form a drainage group. Multiple drainage groups are provided, and the slope of the multiple drainage groups is arranged at intervals in the vertical direction, and the adjacent drainage blind ditches 5 are staggered in the vertical direction.
[0035] It should be noted that the vertical spacing of the drainage blind ditch is 20m, and the extension length from the slope surface is 5m.
[0036] In addition, the width of the horse walkway 6 is not less than 3.0m; the net width and net depth of the horse walkway drainage ditch 61 are both not less than 0.3m, and the drainage slope is not less than 0.003.
[0037] Furthermore, a reverse filter geotextile is provided at the interface between the drainage blind ditch 5 and the horse path drainage ditch 6.
[0038] On the other hand, please see Figure 3 The expansive soil slope structure 100 also includes a retaining wall 7, which is located at the bottom of the slope surface. The retaining wall 7 is a gravity retaining wall. An internal drainage pipe 71 is installed inside the retaining wall 7. A filter geotextile is installed at the port of the internal drainage pipe 71 facing the airport high fill expansive soil slope.
[0039] Furthermore, the expansive soil slope structure 100 also includes a slope toe drainage ditch 8, which is located at the bottom of the retaining wall 7.
[0040] The internal drain pipe 71 has a diameter of not less than 50 mm.
[0041] This utility model provides a specific embodiment. Example: An expansive soil slope structure includes a top-reinforced geogrid 1 and a top-waterproof geotextile 2 embedded at the top of the expansive soil fill, a slope-reinforced geogrid 3 embedded on the side of the expansive soil fill slope, and high-strength geocells 4 disposed on the side surface of the expansive soil fill slope. A walkway 6 is provided at certain intervals along the expansive soil fill, and the walkway 6 is equipped with a walkway drainage ditch 61. A toe wall 7 and a slope toe drainage ditch 8 are provided at the bottom of the expansive soil fill slope, and an internal drainage pipe 71 is installed inside the toe wall 7.
[0042] The top reinforced geogrid 1 has a tensile strength of 80 kN / m, a reinforcement length of 40 m from the boundary of the leveled area to the leveled area, and a reinforcement depth of 5 m. The top waterproof geotextile 2 is laid inside the expansive soil fill to a depth of 1.2 m, with a length of 10 m from the boundary of the leveled area to the leveled area. The slope reinforced geogrid 3 has a tensile strength of 80 kN / m, a vertical spacing of 0.8 m, and a length of 6 m from the slope surface to the expansive soil fill. The high-strength geocell 4 has a tensile yield strength of 23 MPa, a weld tensile strength (peel strength) of 15 kN / m, a joint edge tensile strength of 20 kN / m, an elongation of less than 15%, a grid size of 25 cm × 25 cm, and a height of 100 mm. The project site is backfilled with planting soil and planted with grass. The high-strength geocells 4 are fixed with steel nails. Furthermore, the drainage blind ditch 5 is laid out along the horse path 6, with a vertical spacing of 10m between the upper and lower drainage blind ditches 5 and a horizontal spacing of 20m, arranged in an alternating manner, extending 5m within the expansive soil filling body, and the outlet is wrapped with reverse filter geotextile. Furthermore, the width of the horse walkway 6 is 3.0m; the net width and net depth of the horse walkway drainage ditch 61 are both not less than 0.3m, and the drainage slope is not less than 0.003. Furthermore, the foot protection wall 7 is a gravity retaining wall structure; the internal drainage pipe 71 is made of UPVC material and has a diameter of 50mm.
[0043] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. An expansive soil slope structure for use in airport high-fill expansive soil slopes, the airport high-fill expansive soil slope comprising a horizontal plane and a sloping plane, characterized in that... include: A reinforced geogrid is installed along the horizontal direction, and the reinforced geogrid is buried from the slope surface into the airport high fill expansive soil slope, and is installed corresponding to the horizontal plane. A top waterproof geotextile extends horizontally and is buried from the slope surface into the airport high fill expansive soil slope, and is set corresponding to the horizontal plane. A slope-reinforced geogrid is provided, extending horizontally. The slope-reinforced geogrid is embedded within the expansive soil slope of the airport high embankment, extending from the slope surface. Multiple slope-reinforced geogrids are provided, and they are spaced vertically at intervals along the extension direction of the slope surface. High-strength geocells are laid on the slope surface.
2. The expansive soil slope structure as described in claim 1, characterized in that, Multiple reinforced geogrids are provided, and the multiple reinforced geogrids are arranged at intervals along the vertical axis.
3. The expansive soil slope structure as described in claim 1, characterized in that, Multiple regular hexagonal grids are formed on the high-strength geocell, and a fixing steel nail is provided at the apex of at least one of the regular hexagonal grids. The nail part of the fixing steel nail is used to nail to the slope surface. The regular hexagonal grid is used for backfilling with topsoil and planting grass.
4. The expansive soil slope structure as described in claim 1, characterized in that, The top-reinforced geogrid has a tensile strength greater than or equal to 80 kN / m, an extension length from the slope surface greater than or equal to 40 m, and a depth between it and the horizontal plane greater than or equal to 5 m; and / or, The depth between the top waterproof geotextile and the horizontal plane is 1.2m, and its extension length from the slope surface is greater than or equal to 10m; and / or, The reinforced tensile strength of the slope geogrid is greater than or equal to 40 kN / m, the spacing between multiple slope geogrids is 0.8 m, and the extension length from the slope surface is greater than or equal to 6 m; and / or, The high-strength geocell has a tensile yield strength greater than or equal to 23 MPa, a weld tensile strength greater than or equal to 15 kN / m, an edge tensile strength at the connection greater than or equal to 20 kN / m, an elongation of less than 15%, a grid size of 25 cm × 25 cm, and a height of 100 mm.
5. The expansive soil slope structure as described in claim 1, characterized in that, The expansive soil slope structure also includes a horse trail with a recessed drainage ditch. The horse trail is located on the slope surface, dividing the slope surface vertically.
6. The expansive soil slope structure as described in claim 5, characterized in that, The expansive soil slope structure also includes a drainage ditch extending horizontally, which is buried in the expansive soil slope of the airport corresponding to the horse trail, and connected to the horse trail drainage ditch.
7. The expansive soil slope structure as described in claim 6, characterized in that, The drainage blind ditch and the horse path form a drainage group. Multiple drainage groups are provided, and the slope of the multiple drainage groups is arranged at intervals in the vertical direction, and the drainage blind ditches adjacent in the vertical direction are staggered.
8. The expansive soil slope structure as described in claim 6, characterized in that, A reverse filter geotextile is installed at the interface between the drainage blind ditch and the horse path drainage ditch.
9. The expansive soil slope structure as described in claim 1, characterized in that, The expansive soil slope structure also includes a toe wall, which is located at the bottom of the slope. The toe wall is a gravity retaining wall, and an internal drainage pipe is installed inside the toe wall. A filter geotextile is installed at the port of the internal drainage pipe facing the airport high embankment expansive soil slope.
10. The expansive soil slope structure as described in claim 9, characterized in that, The expansive soil slope structure also includes a slope toe drainage ditch, which is located at the bottom of the retaining wall.