Sandy soil engineering seepage control water storage and drainage blanket with bagged sand wells
By using sandy geotechnical seepage and drainage blankets with bagged sand wells in sponge cities, the problem of inability to effectively take into account both water storage and drainage in the existing technology is solved, and effective anti-seepage and seepage effects under different head conditions are achieved, improving anti-seepage performance and blocking capillary rise.
Patent Information
- Application Number
- CN202421857487.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-08-01
AI Technical Summary
Existing waterproof blankets and water storage blankets cannot effectively take into account both water storage and drainage functions in sponge cities. The traditional sandy soil layer has weak hydrophobicity and the capillary barrier effect is not obvious, making it difficult to achieve ideal anti-seepage and water storage effects in special environments.
Sand geo-controlled seepage storage and drainage blankets with bagged sand wells are used, including sand geo-controlled seepage storage and drainage blankets, counterweight cages and funnel-shaped bagged sand wells. The distance between the funnel-shaped bagged sand wells is higher than that of the sandy geotechnical seepage and drainage blanket. When the water head is less than this distance, the sandy geotechnical seepage and drainage blanket is stored; when the water head is greater than this distance, the water is preferred to drain through the funnel-shaped bagged sand wells and water is introduced into the deeper part of the soil.
It realizes anti-seepage and moisture conservation at low water heads and seepage at high water heads, enhances the overall stability and durability of drainage blankets, improves anti-seepage performance and blocks capillary rise. It is suitable for sponge cities, trapped loess areas, facility agriculture and other sites.
Smart Images
Figure CN222847318U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of novel geosynthetics, and in particular relates to a sandy geotechnical seepage control and drainage blanket with bagged sand wells. Background Art
[0002] In the concept of sponge city, rainwater needs to be allowed to penetrate into the ground as much as possible to achieve rainwater storage and reuse. By simulating the natural water cycle process, the city can be like a sponge, with good flexibility in adapting to environmental changes and responding to natural disasters. In the construction of sponge cities, how to effectively achieve rainwater storage, infiltration and reuse has become an urgent problem to be solved. Among them, factors such as the air permeability of soil and vegetation and the permeability of rainwater play a vital role in the function of sponge cities.
[0003] In order to realize the functions of sponge cities, some measures have been taken, such as the use of materials such as waterproof blankets and water storage blankets. The main function of waterproof blankets is to prevent water penetration. Waterproof blankets will hinder the penetration of rainwater, limiting the functions of sponge cities. In addition, sponge cities emphasize the air permeability of soil and vegetation to promote water evaporation and air circulation. Waterproof blankets will reduce the air permeability of soil and affect the growth and ecological functions of vegetation. However, the water storage capacity of water storage blankets is limited and cannot meet the water storage needs during heavy rainfall. Under extreme weather conditions such as heavy rain, the water storage blanket will quickly reach saturation, causing rainwater to overflow. The existing waterproof blankets and water storage blankets have achieved limited results in sponge cities and can no longer achieve the desired effect. In special soil slopes, the existing waterproof blankets may hinder the natural seepage of water in the slope, resulting in the inability to discharge groundwater normally. In addition, due to its poor anti-slip performance, there is a risk of slope instability. Sandy soil is the main functional material of sandy soil engineering seepage control and drainage blankets and plays a key role. However, the traditional sandy soil layer has weak hydrophobicity, unclear capillary barrier effect and poor water storage capacity, which leads to two extreme situations in special environments. One is that the sandy soil layer's anti-seepage function fails completely, that is, it cannot retain water; the other is that the water is completely cut off (the pores in the sandy soil layer are blocked), that is, the waterproofing is excessive.
[0004] Although materials such as waterproof blankets and water storage blankets have helped the construction of sponge cities to a certain extent, the waterproof performance of waterproof blankets is too strong, which will hinder the natural infiltration of rainwater, and the water storage capacity of water storage blankets is limited and cannot meet the needs of heavy rainfall. In addition, the traditional sandy soil layer has weak hydrophobicity, weak capillary barrier effect, and poor water storage capacity, making it difficult to achieve ideal anti-seepage and water storage effects in special environments. Therefore, it is of great significance to develop a sandy soil engineering seepage control and drainage blanket. Utility Model Content
[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a sandy geotechnical seepage control drainage blanket with bagged sand wells to solve the technical problem that the existing waterproof blanket cannot take into account both water storage and drainage functions.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] The utility model discloses a sandy geotechnical controlled seepage drainage blanket with bagged sand wells, comprising: a sandy geotechnical controlled seepage drainage blanket, a counterweight cage installed below the sandy geotechnical controlled seepage drainage blanket, and a funnel-shaped bagged sand well passing through the counterweight cage and tightly connected to the sandy geotechnical controlled seepage drainage blanket;
[0008] The funnel-shaped bagged sand well passes through a sandy geotechnical seepage control drainage blanket.
[0009] Preferably, the sandy geotechnical seepage control drainage blanket comprises a sandy soil layer and a protective layer wrapped around the outer layer of the sandy soil layer; the protective layer comprises a water-permeable geotextile layer located at the outermost layer and a non-woven fabric layer located at the second outermost layer.
[0010] Further preferably, the permeable geotextile layer is a tooth-shaped structure.
[0011] Preferably, the funnel-shaped bagged sand well is 10-15 cm above the sandy geotechnical seepage control drainage blanket, and the diameter of the raised funnel-shaped bagged sand well is 20-30 cm.
[0012] Further preferably, the height of the funnel-shaped bagged sand well is 10-12 m, the length of the funnel-shaped bagged sand well located at the lower part of the funnel is 9.85-11.9 m, and the diameter is 6-8 cm.
[0013] Further preferably, a PE plastic film is added to the inner layer of the funnel-shaped bagged sand well located below the sandy geotechnical seepage control drainage blanket.
[0014] Preferably, the thickness of the sandy geotechnical seepage control drainage blanket is 10-50 mm.
[0015] Preferably, the funnel-shaped bagged sand well is woven from permeable geotextile.
[0016] Preferably, the counterweight cage is filled with crushed stones and fixedly connected by iron wires.
[0017] Preferably, the counterweight cage is made of PE plastic.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] The utility model discloses a sandy geotechnical controlled seepage drainage blanket with bagged sand wells, comprising: a sandy geotechnical controlled seepage drainage blanket, a counterweight cage installed below the sandy geotechnical controlled seepage drainage blanket, and a funnel-shaped bagged sand well that passes through the counterweight cage and is tightly connected to the sandy geotechnical controlled seepage drainage blanket; the sandy geotechnical controlled seepage drainage blanket passes through the top of the funnel-shaped bagged sand well. The funnel-shaped bagged sand well is higher than the sandy geotechnical controlled seepage drainage blanket by a distance of h. When the water head is less than h, the sandy geotechnical controlled seepage drainage blanket stores water; when the water head is greater than h, drainage is preferentially conducted through the funnel-shaped bagged sand well. At the same time, the sandy geotechnical controlled seepage drainage blanket assists drainage. The funnel-shaped bagged sand well guides water deeper into the soil, allowing rainwater to flow into the soil more naturally while reducing the impact on the roadbed or the foundation of the structure. The weight cage gives downward drag force to the sandy geotechnical seepage control drainage blanket, making it closer to the soil layer, and can be used in sites with a certain slope; in addition, the weight cage can also play an anti-floating role to avoid the top floating damage to the sandy geotechnical seepage control drainage blanket when the bottom water head is large. It can be used for sponge LID facilities in collapsible loess areas, land reclamation and facility agriculture in arid areas, ecological protection of special soil slopes, special soil roadbed barrier layers and other sites that require anti-seepage. It can be flexibly prepared for different sites, effectively improving its anti-seepage performance and blocking migration performance, and is suitable for promotion and use.
[0020] Furthermore, the sandy geotechnical seepage control and drainage blanket includes a sandy soil layer and a protective layer wrapped around the outer layer of the sandy soil layer; the sandy soil layer can prevent seepage and retain moisture when the water head is low, and seepage when the water head is high; the protective layer enhances the overall stability and durability of the drainage blanket, so that it can maintain good performance in various environments; the protective layer includes a permeable geotextile layer located in the outermost layer and a non-woven fabric layer located in the second outer layer; the permeable geotextile layer can increase the fit between the seepage control and drainage blanket and the soil layer; the non-woven fabric layer can not only protect the modified sandy soil from being lost, but also drain water inside it, filter in a direction perpendicular to the plane, and prevent the drainage sandy layer from being blocked. The permeable geotextile layer and the non-woven fabric layer are nested and connected with each other; making the drainage blanket more solid and reducing the risk of delamination or tearing during use. The capillary blocking effect at the interface of the sandy geotechnical seepage control and drainage blanket is significant, which can greatly improve the anti-seepage performance and block the capillary water from rising and causing soil salinization. The funnel-shaped bagged sand well and counterweight cage combined with the sand layer make the sandy geotechnical seepage control drainage blanket have the functions of low head anti-seepage and entropy preservation in the dry season, slope protection, high head seepage in the rainy season, soil permeability (water vapor can move up and down), blocking capillary water rise and ecological slope consolidation.
[0021] Furthermore, the permeable geotextile layer has a tooth-like structure; it can not only increase the fit between the seepage control and drainage blanket and the soil layer, but also protect the seepage control and drainage blanket from being pierced by sharp objects.
[0022] Furthermore, the inner layer of the funnel-shaped bagged sand well located below the sandy geotechnical controlled seepage drainage blanket is provided with a PE plastic film; the part located below the sandy geotechnical controlled seepage drainage blanket needs to be added with a layer of PE plastic film on the inner layer of the funnel-shaped bagged sand well to play a waterproof role, and the part above the sandy geotechnical controlled seepage drainage blanket is not added with PE plastic film to allow water to penetrate freely.
[0023] Furthermore, the thickness of the sandy geotechnical seepage control drainage blanket is 10-50 mm, ensuring that the drainage blanket has sufficient drainage capacity while ensuring ease of use.
[0024] Furthermore, the funnel-shaped bagged sand well is woven with permeable geotextile; it has good water permeability, can effectively allow water to flow through, while preventing the loss of sand particles, ensuring the stability and functionality of the sand well, and has good durability and corrosion resistance, which can extend the service life of the sand well.
[0025] Furthermore, the counterweight cage is filled with gravel, which can increase the overall weight and improve the stability and anti-floating ability of the sand well in the soil, especially when it is washed by water or the soil is loose. It is fixed and connected by iron wire; it can ensure that the position of the gravel in the counterweight cage is stable and not easy to move or scatter, thereby maintaining the effectiveness of the counterweight.
[0026] Furthermore, the counterweight cage is made of PE plastic; PE plastic has good corrosion resistance and weather resistance, can withstand use under various environmental conditions, and extend the service life of the counterweight cage; the material is relatively light, easy to transport and install, and the cost is relatively low, which helps to reduce the overall project cost; it is not easy to rust or corrode, can maintain long-term stability and functionality, and reduce maintenance requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of a sandy geotechnical seepage control drainage blanket with bagged sand wells of the utility model;
[0028] Figure 2 It is a cross-sectional schematic diagram of the sandy soil seepage control and drainage blanket of the utility model;
[0029] Figure 3 This is an exploded schematic diagram of the counterweight cage of the utility model;
[0030] Figure 4 The curves of volume water content variation with time at different heights of different soil columns under 45 cm back pressure head; among them, (a) is homogeneous loess; (b) is modified fine sand.
[0031] Among them: 1- non-woven fabric layer; 2- sand layer; 3- permeable geotextile layer; 4- sandy geotechnical seepage control drainage blanket; 5- counterweight cage; 6- funnel-shaped bagged sand well; h- critical water head for seepage control. DETAILED DESCRIPTION
[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0034] The utility model is further described in detail below with reference to the accompanying drawings:
[0035] See also Figure 1 It is a schematic diagram of a sandy geotechnical seepage control drainage blanket with bagged sand wells of the utility model; Figure 2 It is a cross-sectional schematic diagram of the sandy soil seepage control and drainage blanket of the utility model; Figure 3This is a schematic diagram of the decomposition of the counterweight cage of the utility model; as can be seen from the figure, it includes: a sandy geotechnical seepage control and drainage blanket 4, a counterweight cage 5 installed below the sandy geotechnical seepage control and drainage blanket 4, and a funnel-shaped bagged sand well 6 that passes through the counterweight cage 5 and is tightly connected to the sandy geotechnical seepage control and drainage blanket 4; the sandy geotechnical seepage control and drainage blanket 4 passes through the top of the funnel-shaped bagged sand well 6. The funnel-shaped bagged sand well 6 is woven with permeable geotextiles, wherein the part below the sandy geotechnical seepage control and drainage blanket 4 needs to be covered with a layer of PE plastic film in the inner layer of the funnel-shaped bagged sand well 6 to play a waterproof role, and the part above the sandy geotechnical seepage control and drainage blanket 4 does not have a PE plastic film to allow water to penetrate freely; the counterweight cage 5 is made of PE plastic, and is connected with iron wire after being filled with crushed stones. The sandy geotechnical seepage control and drainage blanket 4 includes: from the outside to the inside, a continuous permeable geotextile layer 3 with a serrated surface made of synthetic fibers knitted or woven, a non-woven fabric layer 1, and a sandy soil layer 2. The permeable geotextile layer 3 with rough-edged teeth is nested with the non-woven fabric layer 1. The rough-edged permeable geotextile layer 3 can not only increase the fit between the seepage control and drainage blanket and the soil layer, but also protect the seepage control and drainage blanket from being pierced by sharp objects. The non-woven fabric layer 1 can not only protect the modified sandy soil from being lost, but also drain water inside it, filter in the direction perpendicular to the plane, and prevent the drainage sandy layer from being blocked. The sandy soil layer 2 is composed of sand, modified materials, and curing agent. It is the soul of the sandy geotechnical seepage control and drainage blanket 4, which can prevent seepage and retain moisture when the water head is low, and seepage when the water head is high. Its unique nested structure design combined with sandy soil makes the seepage control and drainage blanket have the functions of low head (long-term) anti-seepage and entropy preservation in dry season, slope protection, high head (short-term) seepage in rainy season, soil permeability, blocking capillary water rise, ecological slope consolidation, etc. It can be used for sponge LID facilities in collapsible loess areas, land reclamation and facility agriculture in arid areas, ecological protection of special soil slopes, special soil roadbed barrier layer, etc. It is a new type of geosynthetics.The non-woven fabric layer 1 can not only protect the modified sandy soil from loss, but also drain water inside it, and filter in the direction perpendicular to the plane to prevent the drainage sand layer from being blocked by fine-grained soil; the funnel-shaped bagged sand well 6 is higher than the sandy geotechnical controlled seepage drainage blanket 4 by a distance h. When the water head is less than h, the sandy geotechnical controlled seepage drainage blanket 4 stores water; when the water head is greater than h, the funnel-shaped bagged sand well 6 is drained first. At the same time, the sandy geotechnical controlled seepage drainage blanket 4 assists in drainage. The funnel-shaped bagged sand well 6 guides water into the deeper soil, allowing rainwater to flow into the soil more naturally while reducing the impact on the roadbed or the foundation of the structure; the counterweight cage 5 can be filled with crushed stones to give the sandy geotechnical The seepage control and drainage blanket 4 has a downward drag force, which allows it to work together with the toothed structure of the permeable geotextile layer 3, so that the sandy geotechnical seepage control and drainage blanket 4 is more closely attached to the soil layer and can be suitable for sites with a certain slope; in addition, the counterweight cage 5 can also play an anti-floating role to avoid the top floating damage of the sandy geotechnical seepage control and drainage blanket 4 when the bottom water head is large; the structure combined with the funnel-shaped bagged sand well 6 and the counterweight cage 5 combined with the sandy soil makes the sandy geotechnical seepage control and drainage blanket 4 have the functions of low head anti-seepage and entropy preservation in dry season, slope protection, high head seepage in rainy season, soil permeability (water vapor can move up and down), blocking the rise of capillary water and ecological slope consolidation.
[0036] See also Figure 4 The curves of volumetric water content at different heights of different soil columns under 45 cm back pressure head change with time; (a) is homogeneous loess; (b) is modified fine sand; It can be seen from the figure that under the action of 45 cm back pressure head, the volumetric water content change in the homogeneous loess column with a height of 25 to 40 cm can be divided into three stages: "stable-rapid increase-stable". Before the wetting front reaches the height of each moisture sensor, the moisture content of the soil sample remains at the initial level of 12%. As the wetting front rises, once the moisture reaches the corresponding soil column height of the sensor, the moisture content will rise sharply in a short time and finally stabilize at a fixed value. Comparing homogeneous loess and modified fine sand, it can be seen that the volumetric water content measured at the same position of the fine sand after the treatment is significantly reduced, that is, the fine sand after the treatment has a more significant effect on the obstruction of capillary rise.
[0037] Example 1
[0038] A sandy geotechnical seepage control drainage blanket with bagged sand wells, comprising: a sandy geotechnical seepage control drainage blanket 4, a counterweight cage 5 installed below the sandy geotechnical seepage control drainage blanket 4, and a funnel-shaped bagged sand well 6 that passes through the counterweight cage 5 and is tightly connected to the sandy geotechnical seepage control drainage blanket 4; the sandy geotechnical seepage control drainage blanket 4 passes through the top of the funnel-shaped bagged sand well 6. The funnel-shaped bagged sand well 6 is higher than the sandy geotechnical seepage control drainage blanket 4 by a distance of h. When the water head is less than h, the sandy geotechnical seepage control drainage blanket 4 stores water; when the water head is greater than h, water is first drained through the funnel-shaped bagged sand well 6, and at the same time, the sandy geotechnical seepage control drainage blanket 4 assists in drainage. The funnel-shaped bagged sand well 6 guides water deeper into the soil, allowing rainwater to flow into the soil more naturally while reducing the impact on the roadbed or the foundation of the structure. The counterweight cage 5 provides a downward dragging force to the sandy geotechnical controlled seepage storage drainage blanket 4, making it closer to the soil layer, and can be suitable for sites with a certain slope; in addition, the counterweight cage 5 can also play an anti-floating role, avoiding top floating damage to the sandy geotechnical controlled seepage storage drainage blanket 4 when the bottom water head is large.
[0039] Example 2
[0040] A sandy geotechnical seepage control drainage blanket with bagged sand wells, comprising: a sandy geotechnical seepage control drainage blanket 4, a counterweight cage 5 installed below the sandy geotechnical seepage control drainage blanket 4, and a funnel-shaped bagged sand well 6 that passes through the counterweight cage 5 and is tightly connected to the sandy geotechnical seepage control drainage blanket 4; the sandy geotechnical seepage control drainage blanket 4 passes through the top of the funnel-shaped bagged sand well 6. The funnel-shaped bagged sand well 6 is higher than the sandy geotechnical seepage control drainage blanket 4 by a distance of h. When the water head is less than h, the sandy geotechnical seepage control drainage blanket 4 stores water; when the water head is greater than h, water is first drained through the funnel-shaped bagged sand well 6, and at the same time, the sandy geotechnical seepage control drainage blanket 4 assists in drainage. The funnel-shaped bagged sand well 6 guides water deeper into the soil, allowing rainwater to flow into the soil more naturally while reducing the impact on the roadbed or the foundation of the structure. The counterweight cage 5 gives a downward drag force to the sandy geotechnical controlled seepage storage drainage blanket 4, making it closer to the soil layer and suitable for sites with a certain slope; in addition, the counterweight cage 5 can also play an anti-floating role to avoid top floating damage to the sandy geotechnical controlled seepage storage drainage blanket 4 when the bottom water head is large.
[0041] Among them, the sandy geotechnical seepage control and drainage blanket 4 includes a sandy soil layer 2 and a protective layer wrapped around the outer layer of the sandy soil layer 2; the sandy soil layer 2 can prevent seepage and retain moisture when the water head is low, and seepage when the water head is high; the protective layer enhances the overall stability and durability of the drainage blanket, so that it can maintain good performance in various environments; the protective layer includes a permeable geotextile layer 3 located in the outermost layer and a non-woven fabric layer 1 located in the second outer layer; the permeable geotextile layer 3 can increase the fit between the seepage control and drainage blanket and the soil layer; the non-woven fabric layer 1 can not only protect the modified sandy soil from being lost, but also drain water inside it, and filter in a direction perpendicular to the plane to prevent the drainage sandy layer from being blocked. The permeable geotextile layer 3 and the non-woven fabric layer 1 are nested and connected with each other; making the drainage blanket more solid and reducing the risk of delamination or tearing during use. The capillary blocking effect at the interface of the sandy geotechnical seepage control and drainage blanket 4 is significant, which can greatly improve the anti-seepage performance and block the capillary water from rising and causing soil salinization. Its unique nested structure design combined with sandy soil enables the seepage control and drainage blanket to have the functions of low head (long-term) anti-seepage and entropy preservation in dry season, slope protection, high head (short-term) seepage in rainy season, soil permeability, blocking capillary water rise, ecological slope consolidation, etc. It can be used for sponge LID facilities in collapsible loess areas, land reclamation and facility agriculture in arid areas, ecological protection of special soil slopes, special soil roadbed barrier layers and other sites that require anti-seepage. It can be flexibly prepared for different sites, effectively improving its anti-seepage performance and blocking migration performance, and is suitable for promotion and use.
[0042] Example 3
[0043] A sandy geotechnical controlled seepage drainage blanket with bagged sand wells, comprising: a sandy geotechnical controlled seepage drainage blanket 4, a counterweight cage 5 installed below the sandy geotechnical controlled seepage drainage blanket 4, and a funnel-shaped bagged sand well 6 that passes through the counterweight cage 5 and is tightly connected to the sandy geotechnical controlled seepage drainage blanket 4; the sandy geotechnical controlled seepage drainage blanket 4 passes above the funnel-shaped bagged sand well 6.
[0044] The sandy geotechnical drainage blanket 4 comprises a sandy soil layer 2 and a protective layer wrapped around the outer layer of the sandy soil layer 2; the protective layer comprises a water-permeable geotextile layer 3 located at the outermost layer and a non-woven fabric layer 1 located at the second outermost layer. The thickness of the sandy geotechnical drainage blanket 4 is 10 mm. The water-permeable geotextile layer 3 is a tooth-shaped structure.
[0045] The distance above the funnel-shaped bagged sand well 6 is 13 cm above the sandy geotechnical seepage control drainage blanket 4, and the diameter of the raised funnel-shaped bagged sand well 6 is 25 cm. The height of the funnel-shaped bagged sand well 6 is 11 m, and the length of the funnel-shaped bagged sand well 6 located at the lower part of the funnel shape is 9.87 m and the diameter is 6 cm. The inner layer of the part of the funnel-shaped bagged sand well 6 located below the sandy geotechnical seepage control drainage blanket 4 is provided with a PE plastic film. The funnel-shaped bagged sand well 6 is woven from a permeable geotextile. The counterweight cage 5 is filled with gravel and fixedly connected by iron wire. The counterweight cage 5 is made of PE plastic.
[0046] Example 4
[0047] A sandy geotechnical controlled seepage drainage blanket with bagged sand wells, comprising: a sandy geotechnical controlled seepage drainage blanket 4, a counterweight cage 5 installed below the sandy geotechnical controlled seepage drainage blanket 4, and a funnel-shaped bagged sand well 6 that passes through the counterweight cage 5 and is tightly connected to the sandy geotechnical controlled seepage drainage blanket 4; the sandy geotechnical controlled seepage drainage blanket 4 passes above the funnel-shaped bagged sand well 6.
[0048] The sandy geotechnical seepage control drainage blanket 4 includes a sandy soil layer 2 and a protective layer wrapped around the outer layer of the sandy soil layer 2; the protective layer includes a permeable geotextile layer 3 located in the outermost layer and a non-woven fabric layer 1 located in the second outer layer. The permeable geotextile layer 3 is a tooth-shaped structure. The distance above the funnel-shaped bagged sand well 6 is 13 cm above the sandy geotechnical seepage control drainage blanket 4, and the diameter of the raised funnel-shaped bagged sand well 6 is 25 cm. The height of the funnel-shaped bagged sand well 6 is 11 m, and the length of the funnel-shaped bagged sand well 6 located at the lower part of the funnel is 9.87 m and the diameter is 8 cm. The inner layer of the part of the funnel-shaped bagged sand well 6 located below the sandy geotechnical seepage control drainage blanket 4 is provided with a PE plastic film. The thickness of the sandy geotechnical seepage control drainage blanket 4 is 50 mm. The funnel-shaped bagged sand well 6 is woven with permeable geotextile. The counterweight cage 5 is filled with crushed stones and fixedly connected by iron wire. The counterweight cage 5 is made of PE plastic.
[0049] Example 5
[0050] A sandy geotechnical controlled seepage drainage blanket with bagged sand wells, comprising: a sandy geotechnical controlled seepage drainage blanket 4, a counterweight cage 5 installed below the sandy geotechnical controlled seepage drainage blanket 4, and a funnel-shaped bagged sand well 6 that passes through the counterweight cage 5 and is tightly connected to the sandy geotechnical controlled seepage drainage blanket 4; the sandy geotechnical controlled seepage drainage blanket 4 passes above the funnel-shaped bagged sand well 6.
[0051] In this embodiment, the central ecological filter ditch of the municipal road is an important means to improve urban waterlogging and realize natural rainwater accumulation, anti-seepage, infiltration and purification in the construction of sponge cities. However, in the collapsible loess area, the existing design form is difficult to achieve the anti-seepage and infiltration functions at the same time without causing collapsible damage to the adjacent road subgrade. Therefore, it is particularly important to ensure the stability of the road subgrade.
[0052] The utility model discloses a sandy soil controlled seepage storage and drainage blanket with bagged sand wells, which is used for storing water when the rainfall is small and conducting water when the rainfall is heavy, and for ensuring the stability of the adjacent roadbed. The sandy soil layer 2 comprises the following components by mass fraction: 95% of sandy soil (with a particle size between 0.075 and 0.5 mm), 4.8% of polysiloxane and 0.2% of ZI-XINIB curing agent.
[0053] The preparation method of the sandy soil engineering seepage control drainage blanket 4 comprises the following steps:
[0054] 1) Preparation of sand layer
[0055] 11) Wash and dry the sand for later use;
[0056] 12) Mix polysiloxane and ZI-XINIB curing agent in a volume ratio of 30:1 and set aside;
[0057] 13) Adding the modifying agent to the sand in batches, stirring manually to make the modifying agent fully and evenly coated on the surface of the sand particles, wherein the sand accounts for 95% of the mass of the mixture;
[0058] 14) The mixture was placed in an oven and dried at 100°C for 0.5 h. The mixture was crushed and passed through a 2 mm sieve to obtain a sandy soil layer.
[0059] The preparation method of the sandy soil engineering seepage control and drainage blanket 4 disclosed in the present utility model includes but is not limited to the method given in this embodiment.
[0060] 2) Preparation of sandy geotechnical drainage blanket with bagged sand wells
[0061] The permeable geotextile layer 3, the sand layer 2, the non-woven fabric layer 1 and the funnel-shaped bagged sand well 6 are combined together by needle punching to form a sandy geotechnical controlled seepage and drainage blanket 4 with a thickness of 20 mm and a funnel-shaped bagged sand well 6 with a length of 10 m. The funnel-shaped bagged sand well 6 located on the upper part of the sandy geotechnical controlled seepage and drainage blanket 4 has a height of 15 cm and a diameter of 20 cm, and the funnel-shaped bagged sand well 6 located at the lower part of the funnel has a diameter of 7 cm and a length of 9.85 m.
[0062] During the construction and laying, a drilling machine is first used to form a hole, and then a funnel-shaped bagged sand well 6 filled with fine sand is placed therein.
[0063] Example 6
[0064] A sandy geotechnical controlled seepage drainage blanket with bagged sand wells, comprising: a sandy geotechnical controlled seepage drainage blanket 4, a counterweight cage 5 installed below the sandy geotechnical controlled seepage drainage blanket 4, and a funnel-shaped bagged sand well 6 that passes through the counterweight cage 5 and is tightly connected to the sandy geotechnical controlled seepage drainage blanket 4; the sandy geotechnical controlled seepage drainage blanket 4 passes above the funnel-shaped bagged sand well 6.
[0065] The diameter and length of the bagged sand well and the gradation of the sand can be changed, such as: a funnel-shaped bagged sand well 6 with a length of 12m, wherein the bagged sand well located on the upper part of the sandy geotechnical seepage control drainage blanket 4 has a height of 10cm and a diameter of 30cm, and the funnel-shaped bagged sand well 6 located at the lower part of the funnel has a diameter of 7cm and a length of 11.9m. The sand in the funnel-shaped bagged sand well 6 can be coarse sand with a height of 50cm at the upper part, fine sand with a height of 50cm in the middle part, and medium sand with a height of 11m at the lower part.
[0066] The above content is only for explaining the technical idea of the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.
Claims
1. A sandy geotechnical drainage blanket with bagged sand wells, characterized in that: include: A sandy geotechnical controlled seepage and drainage blanket (4), a weight cage (5) installed below the sandy geotechnical controlled seepage and drainage blanket (4), and a funnel-shaped bagged sand well (6) passing through the weight cage (5) and tightly connected to the sandy geotechnical controlled seepage and drainage blanket (4); The funnel-shaped bagged sand well (6) passes through a sandy geotechnical seepage control drainage blanket (4).
2. The sandy geotechnical drainage blanket with bagged sand wells according to claim 1 is characterized in that: The sandy geotechnical seepage control drainage blanket (4) comprises a sandy soil layer (2) and a protective layer wrapped around the outer layer of the sandy soil layer (2); the protective layer comprises a water-permeable geotextile layer (3) located at the outermost layer and a non-woven fabric layer (1) located at the second outermost layer.
3. The sandy geotechnical drainage blanket with bagged sand wells according to claim 2 is characterized in that: The permeable geotextile layer (3) is a tooth-shaped structure.
4. The sandy geotechnical drainage blanket with bagged sand wells according to claim 1 is characterized in that: The funnel-shaped bagged sand well (6) is 10-15 cm higher than the sandy geotechnical seepage control drainage blanket (4), and the diameter of the raised funnel-shaped bagged sand well (6) is 20-30 cm.
5. The sandy geotechnical drainage blanket with bagged sand wells according to claim 4 is characterized in that: The height of the funnel-shaped bagged sand well (6) is 10-12 m, the length of the funnel-shaped bagged sand well (6) located at the lower part of the funnel is 9.85-11.9 m, and the diameter is 6-8 cm.
6. The sandy geotechnical drainage blanket with bagged sand wells according to claim 4 is characterized in that: The inner layer of the funnel-shaped bagged sand well (6) located below the sandy soil engineering seepage control drainage blanket (4) is provided with a PE plastic film.
7. The sandy geotechnical drainage blanket with bagged sand wells according to claim 1 is characterized in that: The thickness of the sandy soil engineering seepage control drainage blanket (4) is 10-50 mm.
8. The sandy geotechnical drainage blanket with bagged sand wells according to claim 1 is characterized in that: The funnel-shaped bagged sand well (6) is woven from water-permeable geotextile.
9. The sandy geotechnical drainage blanket with bagged sand wells according to claim 1, characterized in that: The counterweight cage (5) is filled with crushed stones and is fixedly connected by iron wires.
10. The sandy geotechnical drainage blanket with bagged sand wells according to claim 1, characterized in that: The counterweight cage (5) is made of PE plastic.