Reinforcement, drainage and salt reduction device for salinized soil roadbed slope
By using prefabricated component reinforcement devices on the slope of the salted soil roadbed, combined with the design of fiber cables and permeable stone layers, the problems of alkali aggregate reaction, water and salt migration collapse encountered by the salted soil roadbed in the construction of the salted soil area are solved, and the strength improvement of the roadbed and drainage and salt reduction effect are achieved.
Patent Information
- Application Number
- CN202421635969.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The construction of saline soil roadbeds in saline soil areas faces problems such as alkali aggregate reaction, water-salt migration collapse, water-erosion on roadbed slopes by water and water, and seasonal freeze-thaw damage. The existing technology is difficult to effectively solve these problems.
The prefabricated member reinforcement device is adopted, including two prefabricated members, fiber cables, fixing discs and fixed anchors. The prefabricated members are connected into a modular structure through fiber cables, and a medium permeable stone layer and water suction port are provided on the prefabricated members to achieve the drainage and salt reduction effect.
It effectively improves the strength and freezing and salt resistance of the salt-stained soil roadbed, reduces water-salt erosion and seasonal freezing and thawing damage, and improves the overall construction progress and drought resistance and flood resistance of the roadbed.
Smart Images
Figure CN223003419U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of saline soil subgrade slope reinforcement, in particular to a reinforcement, drainage and salt reduction device for a saline soil subgrade slope. Background Technique
[0002] When building in saline soil areas, concrete faces more difficulties. A typical one is the alkali-aggregate reaction between the saline soil subgrade and concrete. Only by taking salt reduction measures or using corrosion-resistant additives, etc., can the corrosion resistance of concrete be improved. In addition, compared with asphalt pavements, concrete pavements have a lower tolerance for diseases such as subsidence cracks in the subgrade. If problems such as water-soluble subsidence and salt-melting subsidence occur in the saline soil subgrade, it will make the rigid concrete pavement more likely to be damaged.
[0003] The main reasons for the collapse of saline soil subgrades are the water-salt migration collapse caused by water intrusion, as well as the erosion of the subgrade slope by water and the damage caused by normal stress such as excessive road loads. At present, semi-rigid base materials, gravel, etc. are often added to improve the subgrade strength, or the soil body is cemented by a mixture, etc. However, when the soil body is grouted with cement, it is easy to have an alkali-aggregate reaction with saline soil, and then expansion cracks are generated; and in the prior art, the subgrade slope is often treated by strengthening the surface cement grid of the slope or planting trees to fix the slope, etc., which is difficult to meet the special environmental requirements of saline soil subgrades.
[0004] Therefore, based on the inexpensive and high-yield cement, a precast slope reinforcement component that can drain water and reduce salt is developed. This component is directly used as a part of the subgrade structure. While improving the subgrade strength, it can effectively reduce the water-salt migration damage and frost heave damage caused by seasonal freeze-thaw of the subgrade. Content of the Utility Model
[0005] Aiming at the defects existing in the above-mentioned existing technologies, the purpose of the utility model is to provide a reinforcement, drainage and salt reduction device for a saline soil subgrade slope. Two precast components are connected by fiber cables, which can form an effective boundary binding effect on the central saline soil subgrade. The two ends of the fiber cables are respectively fixed on the two precast components through fixed discs and fixed anchor bolts. This device is used as a part of the subgrade structure, and the water-salt solution in the saline soil subgrade is conveniently pumped out from the water absorption port through the middle permeable stone layer on the precast component, which can effectively solve the problems of subgrade water-salt erosion and seasonal freeze-thaw damage in the background technique.
[0006] The above technical purpose of the utility model is achieved through the following technical solutions:
[0007] A reinforcement, drainage and desalination device for the slope of a saline soil subgrade, comprising two prefabricated components, a fixing plate, fixing anchor rods and fiber cables. The two prefabricated components are arranged opposite to each other. At least one fixing plate is provided and disposed outside each prefabricated component. The fiber cables are connected between the two prefabricated components. The outer end of the fiber cable is connected to the fixing plate, and its inner end is connected to the opposite prefabricated component through the fixing anchor rod.
[0008] To achieve the above object, further, the prefabricated component is in the shape of a triangular pier column, which includes an upper concrete layer, a middle permeable stone layer and a lower concrete layer.
[0009] As a further preferred implementation manner of the above technical solution, the middle permeable stone layer is filled with coarse-grained permeable stones, and the two sides of the prefabricated component where it communicates with the middle permeable stone layer are respectively a water absorption port and a water permeation port.
[0010] By adopting the above solution, further, at least two installation holes are formed through the upper concrete layer, and the fiber cables are passed through the installation holes.
[0011] Further preferably, the included angle c between the installation hole and the horizontal direction is determined according to the width of the concrete road surface. When the width of the concrete road surface is 10 m, the initial design value of the included angle c is 20°; this included angle is adjusted accordingly according to the designed width of the road. When the width of the concrete road surface is less than 10 m, c > 20°; when the width of the concrete road surface is greater than 10 m, c < 20°.
[0012] By adopting the above solution, further, the bottom of the lower concrete layer is a serrated structure.
[0013] By adopting the above solution, further, a docking boss and a docking groove are respectively provided on the front side and the rear side of the prefabricated component.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0015] 1. The present utility model includes prefabricated components and fiber cables. The two ends of the fiber cables are respectively connected to two opposite prefabricated components through the fixing plate and the fixing anchor rods, and the construction process is carried out synchronously when the ground is leveled and the subgrade soil is backfilled. The fiber cables form a binding force on the saline soil subgrade, and the internal force formed by their interaction with the saline soil subgrade effectively improves the soil strength. Compared with the traditional subgrade construction process, after connecting multiple prefabricated components along the subgrade to be laid, the present utility model connects the two opposite prefabricated components through fiber cables to form a modular structure. This modular installation method improves the overall construction progress while increasing the subgrade strength and improving the drainage and desalination ability.
[0016] 2. The middle permeable stone layer of the precast member of the present utility model forms a drainage structure. The middle permeable stone layer is filled with coarse-grained permeable stones, which can effectively drain water while greatly improving the overall strength of the structure. The relatively large pores between the coarse-grained permeable stones can fully release the volume of pore water frozen and thawed and expanded, reducing the influence of seasonal freezing and thawing on the strength of the saline soil subgrade.
[0017] 3. The precast member of the present utility model is designed as a triangular pier column with stable structure and high strength. After connecting two adjacent precast members, they are cemented with a cementitious material, and there will be no gaps causing the saline soil subgrade to be soaked in water. It cooperates with the road surface shoulder cushion layer to form a complete protective shell structure, so that the upper part of the saline soil subgrade will not have water permeability problems due to precipitation. If cracks occur subsequently, they can be quickly filled with the cementitious material, and subsequent maintenance is very convenient and the cost is low.
[0018] 4. The consumables used in the device of the present utility model have low cost and are convenient to obtain materials. While reducing the production cost, it can effectively reduce environmental pollution. At the same time, the size of the device can be freely adjusted and manufactured according to engineering requirements, and it can adapt to different climate environments. The roadbed slope formed on the outside of the precast member will not crack due to water loss like the soil body during drought, and will not cause soil erosion like the soil body during the flood season, improving the drought and flood resistance of the subgrade as a whole. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below.
[0020] Figure 1 It is a longitudinal sectional view of a device for reinforcing, draining and desalinating a saline soil subgrade slope of the present utility model along the water absorption port and the water permeation port;
[0021] Figure 2 It is a longitudinal sectional view of the device of the present utility model along the mounting hole;
[0022] Figure 3 It is the front view of a single precast member of the present utility model;
[0023] Figure 4 It is the top view of a single precast member of the present utility model;
[0024] Figure 5 It is the left view of a single precast member of the present utility model;
[0025] Figure 6 It is the right view of a single precast member of the present utility model;
[0026] Figure 7 It is Figure 6 a sectional view along the C-C direction;
[0027] In the figure: 1. Prefabricated component; 2. Docking protrusion; 3. Docking groove; 4. Installation hole; 4-1. Fixed plate; 4-2. Fiber cable; 4-3. Fixed anchor rod; 5. Water suction port; 5-1. Permeable port; 5-2. Coarse-grained permeable stone; 6. Concrete pavement; 6-1. Pavement shoulder cushion layer; 6-2. Pavement cushion layer; 7. Semi-rigid base; 8. Saline soil subgrade. Specific implementation mode
[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0030] In addition, in the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Embodiment 1
[0031] Refer to Figures 1-6, the present utility model provides a reinforcement, drainage and salt reduction device for a saline soil subgrade slope, which includes two prefabricated components 1, a fixing plate 4-1, a fixing anchor rod 4-3 and a fiber cable 4-2. The two prefabricated components 1 are arranged opposite to each other, and the two prefabricated components 1 are installed and fixed by connecting the two ends of the fiber cable 4-2 to the fixing plate 4-1 and the fixing anchor rod 4-3 respectively. The fiber cable 4-2 can be made of waste materials, preferably materials such as polyvinyl chloride of "white pollution" that do not react with sulfate saline soil or carbonate saline soil, and then mixed with flexible materials such as corrosion-resistant stainless steel wires. The subgrade soil is backfilled between the two opposite prefabricated components 1 and will not be damaged due to vibration and load during the compaction of the saline soil subgrade 8 by a roller. Specifically: the fixing plate 4-1 has at least one and is arranged outside each prefabricated component 1. The fiber cable 4-2 is connected between the two prefabricated components 1. The outer end of the fiber cable 4-2 is connected to the fixing plate 4-1, and its inner end is connected to the opposite prefabricated component 1 through the fixing anchor rod 4-3. The depth connection of the fixing anchor rod 4-3 extends the force transmission range of the saline soil subgrade 8 and can effectively improve the overall strength of the saline soil subgrade 8.
[0032] Specifically, the prefabricated component 1 is in the shape of a triangular pier column. In this embodiment, the included angle a between its outer side and the horizontal direction is 60°, the height is 3m, and the width is 5.1m (the specific dimensions are adjusted according to the road design requirements). Its inner side is in a stepped shape. Refer to Figure 5 , the included angles between the inner side and the horizontal direction from bottom to top are b1 = 15°, b2 = 85°, and b3 = 15° in sequence. The prefabricated component 1 includes an upper concrete layer, a middle permeable stone layer and a lower concrete layer. The upper concrete layer and the lower concrete layer are poured with cement added with corrosion-resistant additives. The middle permeable stone layer is filled with coarse-grained permeable stones 5-2 (standard sand). The coarse-grained permeable stones 5-2 are made of gravel with larger particle size and higher strength, have good water permeability characteristics, and the overall strength is effectively guaranteed. There are no special requirements for the template material used in the pouring process. It can be a high-precision recyclable aluminum template or a low-precision and inexpensive wooden template. The splicing cracks of the prefabricated components produced with low precision can be filled with cementitious materials such as cement.
[0033] More specifically, the overall length of the prefabricated component 1 is controllable. When it is greatly restricted by the construction site, the length of the prefabricated component 1 can be adjusted, and the minimum can reach less than 1m. The minimum size of the prefabricated component 1 is the compartment of a single coarse-grained permeable stone 5-2.
[0034] As Figure 1As shown, a water absorption port 5 and a water permeation port 5-1 are respectively arranged on the outer side and the inner side of the precast member 1. Both the water absorption port 5 and the water permeation port 5-1 communicate with the middle water permeable stone layer. A fine and corrosion-resistant wire mesh can be arranged on the surface of the water permeation port to prevent the saline soil subgrade 8 from blocking the water permeation port 5-1. The coarse-grained water permeable stones 5-2 are closely adjacent to each other in the middle water permeable stone layer, which can effectively bear the upper load, and the gaps between the coarse-grained water permeable stones 5-2 enable the water-salt solution in the saline soil subgrade 8 to be pumped out in time through the water absorption port 5.
[0035] Referring to Figure 2 , at least two installation holes 4 are formed through the upper concrete layer. The installation holes 4 are inclined, and the included angle c between the installation holes 4 and the horizontal direction is determined according to the width of the concrete pavement. In this embodiment, when the width of the concrete pavement is 10 m, the initial design value of the included angle c is 20°; this included angle is adjusted accordingly according to the designed width of the road. When the width of the concrete pavement is less than 10 m, c > 20°; when the width of the concrete pavement is greater than 10 m, c < 20°. The installation holes 4 are used for threading fiber cables 4-2, so that one end of the fiber cable 4-2 is fixed at the fixed disk 4-1 on the precast member 1, and the other end is fixed to the opposite precast member 1 through a fixed anchor 4-3. In this way, the two precast members 1 are connected into a whole through the fiber cable 4-2.
[0036] Referring to Figures 1-2 , the bottom of the lower concrete layer is a serrated structure, and the whole bottom surface of the precast member 1 is made into a serrated structure to increase the frictional biting force with the ground, which can effectively resist the expansion force transmitted from the upper load borne by the saline soil subgrade 8 to the lower part.
[0037] As Figures 3-6 shown, a butt joint boss 2 and a butt joint groove 3 are respectively arranged on the front side and the rear side of the precast member 1. Here, the front side and the rear side of the precast member 1 refer to the length direction of the precast member 1. During the actual construction of the saline soil subgrade 8, multiple devices of this application need to be assembled. Therefore, the butt joint boss 2 of each precast member 1 is installed with the butt joint groove 3 of the adjacent next precast member 1, and the connection of the adjacent two precast members 1 is completed by referring to the "mortise and tenon" structure, which is mainly used for positioning and transmitting loads. The manufacturing precision requirements for the butt joint boss 2 and the butt joint groove 3 are not high. The detailed gaps after connection can be filled with a cementing agent. Through the butt joint boss 2 and the butt joint groove 3, the construction can be carried out quickly, the construction technical requirements can be reduced, and at the same time, it is convenient to confirm the installation direction of the precast member 1. Embodiment 2
[0038] On the basis of the above Embodiment 1, as Figure 7As shown, if the construction conditions are met, the optimal size of the precast member 1 of the present application is the length of 7 coarse aggregate permeable stone compartments 5-2. Correspondingly, there are 14 installation holes 4 in total. This designed length can ensure the construction progress while not causing excessive bending moment inside the precast member 1 during transportation due to excessive length. Embodiment 3
[0039] A reinforcement, drainage and salt reduction device for saline soil subgrade slopes, in practical application:
[0040] First, determine the specific size of a single precast member 1 according to the engineering construction conditions, transportation conditions, precast yard feeding conditions, etc., and make the corresponding standard template. Install the standard template, pour the lower concrete layer, fill the coarse aggregate permeable stone 5-2, and continue to pour to form the upper concrete layer after filling to complete the production of the precast member 1. Wait until the precast member 1 has initially set, and according to the coordination arrangement of the construction period requirements and production capacity, decide whether to immediately transport it to the construction site or transfer it to the curing area for further sprinkler curing;
[0041] Second, after transporting the precast member 1 to the site, align the docking boss 2 with the docking groove 3 to determine the direction for installation. Install the fiber cable 4-2 through the installation hole 4 to tighten the two relatively precast members 1 on both sides of the saline soil subgrade 8 respectively. Fix the two ends of the fiber cable 4-2 respectively by using the fixing plate 4-1 and the fixing anchor 4-3, and fill the gap between two adjacent precast members 1 with a binder to ensure the integrity of the structure;
[0042] Then, after waiting for the strength of the bonding to reach the standard, start filling saline soil between two rows of interconnected precast members 1 to form the saline soil subgrade 8, and compact the foundation with a roller. Then, lay a semi-rigid base course 7, a pavement cushion layer 6-2 and a concrete pavement 6 successively upward on the surface of the saline soil subgrade 8, and lay a pavement shoulder cushion layer 6-1 on the upper inclined surface of the precast member 1. The precast member 1 forms an effective strength support for the pavement shoulder cushion layer 6-1, which can improve the integrity of the concrete pavement 6 and the precast member 1 and enhance the tolerance to high-load operations and bad weather;
[0043] After the construction is completed, pump out the saline accumulated water in the coarse aggregate permeable stone 5-2 from the reserved water suction port 5 by a high-pressure water pump. Use the coarse aggregate permeable stone 5-2 as a water storage structure. While ensuring the structural strength of the road, use the water to carry out the salts in the subgrade soil out through the water suction port 5. After the construction is completed, it is still possible to pump water multiple times through the water suction port 2, effectively reducing the problem of soil strength attenuation caused by water accumulation in the saline soil subgrade 8.
[0044] It should be clear that the above detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention claimed, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.
Claims
1. A device for reinforcing, draining and reducing salt in saline soil roadbed slopes, characterized in that: The invention comprises two prefabricated components (1), a fixing plate (4-1), a fiber cable (4-2) and a fixing anchor rod (4-3); the two prefabricated components (1) are arranged opposite to each other; at least one fixing plate (4-1) is provided and arranged on the outside of each prefabricated component (1); the fiber cable (4-2) is connected between the two prefabricated components (1); an outer end of the fiber cable (4-2) is connected to the fixing plate (4-1), and an inner end of the fiber cable (4-2) is connected to the prefabricated component (1) on the opposite side via the fixing anchor rod (4-3).
2. The device for reinforcing, draining and reducing salt in saline soil roadbed slope according to claim 1, characterized in that: The prefabricated component (1) is in the shape of a triangular pier, and comprises an upper concrete layer, a middle permeable stone layer and a lower concrete layer.
3. The device for reinforcing, draining and reducing salt in saline soil roadbed slope according to claim 2, characterized in that: The middle permeable stone layer is filled with coarse-grained permeable stone (5-2), and the two sides of the prefabricated component (1) in communication with the middle permeable stone layer are respectively provided with a water intake port (5) and a water permeation port (5-1).
4. The device for reinforcing, draining and reducing salt in saline soil roadbed slope according to claim 3, characterized in that: At least two installation holes (4) are provided through the upper concrete layer, and the fiber cables (4-2) are passed through the installation holes (4).
5. The device for reinforcing, draining and reducing salt in saline soil roadbed slope according to claim 4, characterized in that: The bottom of the lower concrete layer has a sawtooth structure.
6. The device for reinforcing, draining and reducing salt in saline soil roadbed slope according to claim 5, characterized in that: The front side and the rear side of the prefabricated component (1) are also provided with a docking boss (2) and a docking groove (3) respectively.