Biological anchoring device for cementing and fixing poor soil and road protection system
By using a bio-anchoring device to catalyze the formation of calcium carbonate crystals from urea through urease, the problem of easy erosion of roadbed soil was solved, thereby improving the stability of the foundation soil and preventing landslides, while reducing maintenance costs and environmental impact.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-06
AI Technical Summary
In existing technologies, the soil particles of roadbed foundation soil and landslide gravel have poor cohesion and are easily transported or washed away, resulting in unstable road structures and easy occurrence of subgrade soil loss and landslide disasters.
A biological anchoring device is adopted, including an infusion pipe, ground anchor rods, ground anchor supports, and a urease storage tank. By delivering urease and urea to the foundation, the urease catalyzes the urea to generate calcium carbonate crystals, which cement and fix the poor soil, thereby enhancing the shear strength and stability of the foundation soil.
It effectively binds and stabilizes poor soil, improves the shear strength and erosion resistance of foundation soil, reduces maintenance costs, enhances road safety, and lowers total life cycle costs and environmental impact.
Smart Images
Figure CN223974442U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of foundation anchoring technology, specifically a biological anchoring device and road protection system for cementing and fixing poor soil. Background Technology
[0002] As one of the most important transportation infrastructures in modern society, highways serve multiple functions, including the movement of people and the transport of goods. With the acceleration of urbanization and the increasing frequency of inter-regional exchanges, highway travel has become an indispensable part of people's lives. The construction and improvement of highway networks can strengthen economic ties between different regions and promote the optimal allocation of resources. For example, through the connection of expressways, agricultural products can be transported from production areas to urban markets more quickly, reducing logistics costs, improving the efficiency of commodity circulation, and thus driving the development of related industries such as logistics, warehousing, and catering. At the same time, highway travel meets people's diverse travel needs; whether it is daily commuting, tourism, or visiting relatives and friends, highways provide a flexible and convenient mode of transportation.
[0003] Highway engineering, as a linearly extending man-made structure, consists of, from bottom to top, the roadbed, subbase, base course, and surface course. The roadbed is the natural foundation of the highway, directly bearing the loads transferred from the superstructure; it is the "foundation" of the highway. The subbase is used to regulate roadbed moisture, drain water, prevent frost heave, and help distribute loads; it includes permeable materials such as sand, gravel, and crushed stone. The base course bears the load, transferring vehicle loads to the lower layers; it mainly consists of high-strength materials such as cement-stabilized crushed stone and asphalt-stabilized crushed stone. The surface course directly contacts vehicle tires, providing a smooth, anti-skid, and wear-resistant driving surface; it is mainly asphalt concrete or cement concrete.
[0004] In recent years, with the intensification of global climate change and the frequent occurrence of extreme rainstorms, the stability of highway structures is highly dependent on the surrounding geological environment. Under continuous heavy rainfall, a large amount of rainwater seeps into the roadbed, causing a sharp increase in soil moisture content, reduced friction between soil particles, decreased shear strength, and abrupt changes in the hydraulic gradient leading to an imbalance of seepage pressure. This weakens the cementation between soil particles, triggering shallow slope sliding. Under vehicle loads, this can easily result in significant soil loss and dispersion. Furthermore, many mountain slopes are prone to landslides and collapses under storm conditions. Therefore, the stability of highway slopes has become a major factor affecting highway traffic safety. Utility Model Content
[0005] In view of the problem that the existing technology has poor cohesion of road foundation soil and landslide gravel particles, which are easily transported or washed away, this utility model provides a biological anchoring device and road protection system for cementing and fixing poor soil.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] This utility model provides a biological anchoring device for cementing and fixing poor soil, including an infusion pipe installed in the road subbase and a ground anchor embedded in the road slope;
[0008] The ground anchor rod is provided with a urease channel and connected to a urease storage tank, which stores urease inside; the ground anchor rod is hinged with a number of ground anchor supports, which are sleeve structures communicating with the urease channel.
[0009] The infusion tube is connected to a urea supply structure, and the infusion tube is provided with several urea outlet holes.
[0010] Optionally, the ground anchor is a lattice sleeve structure, and the ground anchor is hinged to the internal lattice.
[0011] Optionally, the hinge rotation angle between the ground anchor rod and the ground anchor brace is less than or equal to 90°.
[0012] Optionally, the ground anchor is connected to the urease storage tank via a liquid guide pipe.
[0013] Optionally, a first pressure pump is provided on the liquid guide tube.
[0014] Optionally, a second pressure pump is provided on the infusion tube.
[0015] Optionally, the ground anchor is embedded from the road slope surface into the road joint layer.
[0016] A road protection system includes crash barriers and the aforementioned bio-anchoring device for bonding and fixing poor soil, wherein the crash barriers are located on both sides of the road and connected to an infusion pipe.
[0017] Optionally, the crash barrier includes an inner leg and an outer leg, the inner leg being connected to the outer leg, the inner leg being positioned at the edge of the road, and the outer leg being fixed to the road slope.
[0018] Optionally, the crash barrier is provided with a urea infusion chamber, and a urea infusion port is provided at the entrance of the urea infusion chamber, and the urea infusion chamber is connected to the infusion tube.
[0019] Compared with the prior art, the present invention has the following beneficial effects:
[0020] This invention relates to a bio-anchoring device for cementing and fixing poor soil conditions. It includes an infusion pipe installed in the road subbase and ground anchors embedded within the road slope. By incorporating a urease channel within the ground anchor and connecting it to a urease storage tank and ground anchor support, urease liquid is delivered from the ground anchor to the ground anchor support and released into the soil. The infusion pipe connects to a urea supply structure, allowing urea to be delivered to the road subbase to react with the urease liquid. The urease catalyzes the hydrolysis of urea to generate ammonium and carbonate ions, which combine with calcium ions in the soil to form calcium carbonate precipitate. The calcium carbonate crystals fill the gaps between soil particles, achieving bio-induced cementation and fixing of the originally poor geological conditions. This cements loose soil, improves shear strength and overall stability, significantly enhancing the shear resistance, load-bearing capacity, and anti-erosion ability of the foundation soil particles, thereby greatly reducing the maintenance costs for road and landslide stabilization.
[0021] The ground anchor bolt is a lattice-type sleeve structure, and the ground anchor support is hinged to the internal lattice. The lattice-type sleeve structure is a composite structure that combines the characteristics of both lattice and sleeve structures. This structure can ensure the integrity of the urease channels inside the ground anchor bolt while improving the strength of the ground anchor bolt.
[0022] The hinge rotation angle between the ground anchor rod and the ground anchor brace is less than or equal to 90°. When the ground anchor brace is sent into the slope, it can be closed by a force in the forward direction, and can be pulled out in the reverse direction to provide resistance and achieve anchoring.
[0023] A first pressure pump is installed on the liquid guide tube, and a second pressure pump is installed on the infusion tube. The installation of the first and second pressure pumps facilitates the pumping and binding reaction of urease solution and urea, thereby improving the efficiency and effect of bonding and curing.
[0024] Jointed layers typically refer to cracks or layered structures within rock masses that can affect slope stability. Embedding ground anchors from the surface into jointed layers means that the anchors penetrate the unstable surface soil and are directly anchored to a deeper, more stable structure. This more effectively prevents landslides or displacements and enhances the anchoring effect of ground anchors on slopes.
[0025] A road protection system includes crash barriers and the aforementioned bio-anchoring device for cementing and fixing poor soil. The crash barriers are installed on both sides of the road and connected to an infusion pipe. Through the deep integration of the crash barriers and the bio-anchoring device, a breakthrough in mechanical protection and ecological reinforcement is achieved. This not only improves the road safety level but also significantly reduces the total life cycle cost and environmental impact. It is particularly suitable for road scenarios with complex geological conditions, high environmental protection requirements, or frequent disasters, providing an innovative paradigm for the sustainable development of next-generation infrastructure. Attached Figure Description
[0026] Figure 1This is a schematic diagram of the installation structure of a biological anchoring device for cementing and fixing poor soil according to the present invention.
[0027] Figure 2 This is a schematic front view of the ground anchor structure of this utility model.
[0028] Figure 3 This is a schematic top view of the ground anchor structure of this utility model.
[0029] Figure 4 This is a schematic diagram of the ground anchor arrangement of this utility model.
[0030] Among them, 1-highway subbase, 2-highway slope, 3-ground anchor, 4-ground anchor support, 5-urease storage tank, 6-crash guardrail, 7-liquid guide pipe, 8-second pressure pump, 9-infusion pipe, 10-first pressure pump, 11-urea injection port, 12-highway joint layer, 61-inner leg, 62-outer leg. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0034] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0035] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0036] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] The present invention will be further described in detail below with reference to specific embodiments. The description is for explanation and not limitation of the present invention.
[0038] See Figure 1 This utility model discloses a biological anchoring device for cementing and fixing poor soil, including an infusion pipe 9 installed in the road subbase 1 and a ground anchor 3 embedded in the road slope 2.
[0039] See Figures 2 to 4 The ground anchor 3 is embedded into the road joint layer 12 from the surface of the road slope 2 to achieve anchoring. The ground anchor 3 is provided with a urease channel and is connected to a urease storage tank 5 through a liquid guide pipe 7. The urease storage tank 5 stores urease. A first pressure pump 10 is provided on the liquid guide pipe 7 to introduce the urease in the urease storage tank 5 into the ground anchor 3. The ground anchor 3 is a lattice sleeve structure with several ground anchor supports 4 hinged to it. The ground anchor supports 4 are sleeve structures that communicate with the urease channel. Preferably, the ground anchor supports 4 are lattice-hinged with the ground anchor 3. The hinge rotation angle between the ground anchor 3 and the ground anchor supports 4 is less than or equal to 90°. When the ground anchor supports are sent into the slope, they can be closed by a force in the forward direction and pulled out in the reverse direction to provide resistance, thereby achieving anchoring.
[0040] The infusion tube 9 is connected to a urea supply structure, and the infusion tube 9 is provided with a number of urea output holes. The infusion tube 9 is provided with a second pressure pump 8 for pumping urea to the road subbase 1. The urea output holes are unidirectional outward holes, which only allow urea to be transported from the inside of the infusion tube 9 to the outside.
[0041] This device, through the installation of infusion pipes 9, ground anchors 3, ground anchor supports 4, and urease storage tanks 5, delivers urea and urease to the cushion layer 1 for reaction. Urease catalyzes the hydrolysis of urea to generate ammonium ions and carbonate ions, which combine with calcium ions in the soil to form calcium carbonate precipitate. The calcium carbonate crystals fill the gaps between soil particles, achieving biologically induced cementation and fixation of the originally unfavorable geological conditions. This cements the loose soil, improves shear strength and overall stability, and greatly enhances the shear resistance, bearing capacity, and anti-erosion ability of the foundation soil particles, significantly reducing the maintenance costs of road and landslide stabilization.
[0042] See Figure 1 This utility model provides a road protection system, including a crash barrier 6 and the above-mentioned biological anchoring device for cementing and fixing poor soil. The crash barrier 6 is set on both sides of the road and includes an inner leg 61 and an outer leg 62. The inner leg 61 is connected to the outer leg 62. The inner leg 61 is set at the edge of the road, and the outer leg 62 is fixed on the road slope 2 and connected to the infusion pipe 9. The crash barrier 6 is provided with a urea infusion chamber, and a urea infusion port 11 is provided at the entrance of the urea infusion chamber. The urea infusion chamber is connected to the infusion pipe 9, which crosses the road and connects to the crash barriers 6 on both sides of the road. The ground anchors 3 are evenly staggered on the slopes 2 on both sides of the road along the outer side of the outer leg 62. The ground anchor supports 4 are arranged sequentially on the ground anchors 3 along the axial direction of the ground anchors 3 and are extended circumferentially along the ground anchors 3. Preferably, the urea infusion chamber is located inside the outer leg 62 and is provided with a urea infusion port 11 for infusing urea into the infusion pipe 9.
[0043] This system achieves breakthroughs in mechanical protection and ecological reinforcement through the deep integration of crash barriers 6 and biological anchoring devices. It not only improves the level of road safety, but also significantly reduces the total life cycle cost and environmental burden. It is especially suitable for road scenarios with complex geological conditions, high environmental protection requirements, or frequent disasters, and provides an innovative paradigm for the sustainable development of next-generation infrastructure.
[0044] Installation and operation process:
[0045] The pre-fill soil and road subbase 1 are laid, and the infusion pipe 9 is buried and led out at the corresponding position of the road subbase 1;
[0046] Road surface and slope treatment is carried out, and the infusion pipe 9 is welded to the crash barrier 6 to form a whole. A urea injection port 11 is preset, or the urea supply structure can be directly connected at the urea injection port 11, or manual injection can be used, and the urea introduction method is not limited.
[0047] Send the ground anchor 3 to the corresponding position in the slope according to the device diagram, and then connect the liquid guide pipe 7 and the urease storage tank 5 accordingly;
[0048] When in use, the urea solution is pumped into the infusion pipe 9 and the space around the outer leg 62 of the underground anti-collision railing 6 through the second pressure pump 8.
[0049] The urease solution is pumped into the sand and gravel layer by the first pressure pump 10, and then it reacts with the urea solution to solidify.
[0050] After the urease solution and urea solution react and solidify, urea solution and urease solution are introduced again for secondary cementation and fixation, thereby achieving better physicochemical stability.
[0051] In summary, this utility model provides a biological anchoring device and road protection system for cementing and fixing poor soil conditions. Addressing the problem of poor cohesion in roadbed soil and landslide gravel particles under stormy and rainy conditions, making them easily transported or washed away, the device incorporates structures such as ground anchors 3, ground anchor supports 4, urease storage tanks 5, and infusion pipes 9. This achieves biologically induced cementation and fixing of the originally unfavorable geological conditions while preserving the original geological conditions as much as possible. This significantly enhances the shear strength, load-bearing capacity, and anti-erosion ability of the foundation soil particles. The device has a simple structure, is easy to install, and is low in cost, making it suitable for slope stabilization in various complex environments.
[0052] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the technical solution of the present utility model in any way. Those skilled in the art should understand that, without departing from the spirit and principles of the present utility model, the technical solution can be modified and replaced in several simple ways, and these modifications and replacements are all within the scope of protection covered by the claims.
Claims
1. A bio-anchoring device for cementing poor soil conditions, characterized by, The utility model relates to a biological anchoring device for cementing fixed bad soil quality, which comprises a highway cushion (1) and a ground anchor rod (3) embedded in a highway slope (2). The ground anchor rod (3) is provided with a urease channel and is connected with a urease storage tank (5) which stores urease; the ground anchor rod (3) is hinged with a plurality of ground anchor braces (4) which are sleeve structures in communication with the urease channel; The urea supply structure is connected with the infusion tube (9), and a plurality of urea output holes are arranged on the infusion tube (9).
2. The bio-anchoring device for cementing poor soil conditions as claimed in claim 1 wherein, The ground anchor rod (3) is a lattice sleeve structure, and the ground anchor brace (4) is hinged with the internal lattice.
3. The bio-anchoring device for cementing poor soil conditions as claimed in claim 1 wherein, The hinged rotation angle between the ground anchor rod (3) and the ground anchor brace (4) is less than or equal to 90°.
4. The bio-anchoring device for cementing poor soil conditions as claimed in claim 1 wherein, The ground anchor rod (3) is in communication with the urease storage tank (5) through a liquid guide pipe (7).
5. The bio-anchoring device for cementing poor soil conditions as claimed in claim 4 wherein, A first pressure pump (10) is arranged on the liquid guide pipe (7).
6. The bio-anchoring device for cementing poor soil conditions of claim 1, wherein, A second pressure pump (8) is arranged on the infusion tube (9).
7. The bio-anchoring device for cementing poor soil conditions of claim 1, wherein, The ground anchor rod (3) is embedded from the surface of the highway slope (2) to the highway joint layer (12).
8. A roadway guard system characterized by, The utility model relates to a biological anchoring device for cementing fixed bad soil quality, which comprises a highway cushion (1) and a ground anchor rod (3) embedded in a highway slope (2).
9. The roadway guard system of claim 8, wherein, The utility model relates to a biological anchoring device for cementing fixed bad soil quality, which comprises a highway cushion (1) and a ground anchor rod (3) embedded in a highway slope (2).
10. The roadway guard system of claim 8, wherein, The utility model relates to a biological anchoring device for cementing fixed bad soil quality, which comprises a highway cushion (1) and a ground anchor rod (3) embedded in a highway slope (2).