Slope reinforcement method and device based on geotechnical component and biological reinforcement technology

Abstract

The invention discloses a side slope reinforcing method and device based on a geotechnical component and a biological reinforcing technology, belongs to the technical field of side slope reinforcing and ecological restoration, and solves the problems that a traditional side slope reinforcing mode is serious in environmental pollution and not beneficial to ecological restoration. The method specifically comprises the following steps: trimming a multi-soil-layer slope; soil engineering components are arranged on the multi-soil-layer side slope; spreading plant grass seeds on the geotechnical members, backfilling the plant grass seeds with a sandy soil layer, and covering the plant grass seeds; and finally, injecting the prepared biological culture medium into a sandy soil layer. According to the multi-soil-layer slope protection structure, the laid soil engineering components play a role in immediately reinforcing the multi-soil-layer slope, and physical protection of the multi-soil-layer slope is achieved; the activity of microorganisms in the biological culture medium is beneficial to enhancing the stability of soil for a long time; the spread plant grass seeds provide guarantee for ecological restoration of the side slope; therefore, the long-term stability of the multi-soil-layer slope is improved under the biological reinforcement and the physical reinforcement of the geotechnical component; the environment cannot be polluted, and ecological restoration is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of slope reinforcement and ecological restoration, and particularly to a slope reinforcement method and device based on geotechnical components and biological reinforcement technology. Background Art

[0002] Multi-layer soil slopes often face problems such as erosion, landslides, and soil erosion due to their loose granular structure and low natural stability. Especially under the action of natural factors such as heavy rainfall, the sand is prone to particle loss, resulting in phenomena such as soil structure damage and slope collapse. These problems not only pose a great threat to the stability of slopes and the construction of coastal infrastructure, but also bring challenges to the protection and restoration of the ecological environment. Therefore, how to effectively enhance the stability of slopes and prevent soil erosion of multi-layer soil slopes is an important issue.

[0003] Traditional slope reinforcement methods, such as retaining walls, gabion nets, and cement solidification technology, can improve the stability of slopes to a certain extent. However, the principles of these traditional reinforcement methods are to use external barriers to block the slopes to prevent the soil mass of the slopes from landsliding or collapsing. This method is prone to polluting the environment and damaging the original ecosystem, which is not conducive to ecological restoration. Moreover, after this method of reinforcement, the slope soil itself is not solidified, but only the movement of the slope soil is restricted. As time accumulates, the load borne by the barrier gradually increases, and there is a high probability of a collapse accident. Therefore, there is an urgent need to find an ecological-friendly and sustainable ecological reinforcement method for multi-layer soil slopes. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides a slope reinforcement method and device based on geotechnical components and biological reinforcement technology, which solves the problems of serious environmental pollution and unfavorable ecological restoration in traditional slope reinforcement methods.

[0005] In the first aspect, in order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A slope reinforcement method based on geotechnical components and biological reinforcement technology, comprising the following steps:

[0007] S1: Configure a biological culture medium;

[0008] S2: Trim the multi-layer soil slope;

[0009] S3: Arrange geotechnical components on the multi-layer soil slope;

[0010] S4: Spread plant grass seeds on the geotechnical components;

[0011] S5: Backfill a sandy soil layer on the plant grass seeds to cover the plant grass seeds;

[0012] S6: Inject the biological culture medium onto the sandy soil layer.

[0013] In this solution, geotechnical components are laid on the multi-layer soil slope, and the geotechnical components play an immediate reinforcement role for the multi-layer soil slope, realizing the physical protection of the multi-layer soil slope; the activity of microorganisms in the biological culture medium helps to enhance the soil stability in the long term; the sown plant grass seeds provide guarantee for the ecological restoration and reinforcement of the slope; under the biological reinforcement and the physical reinforcement of the geotechnical components, not only the long-term stability of the multi-layer soil slope is improved, the manual intervention and the environmental damage are reduced, but also strong support is provided for the ecological restoration.

[0014] Further, in S1, urea, calcium chloride, ammonium chloride, soy peptone, Bacillus pasteurii and nickel chloride are dissolved in deionized water and stirred and mixed to obtain the biological culture medium.

[0015] In this solution, Bacillus pasteurii decomposes urea in the biological culture medium through its own metabolic activities to generate carbonate ions, and the carbonate ions react with calcium ions to form calcium carbonate precipitates. The calcium carbonate forms crystal structures inside the soil mass and around the inside of the geotechnical components, filling the pores of the soil mass, thereby enhancing the integrity and strength of the slope and realizing the reinforcement of the slope.

[0016] Further, the concentration of urea in the biological culture medium is 10 - 30 g / L, the concentration of calcium chloride is 27 - 55.49 g / L, the concentration of soy peptone is 19 - 25 g / L, the concentration of ammonium chloride is 11.9 - 17 g / L, the concentration of nickel chloride is 0.11 - 0.3 g / L, and the concentration of Bacillus pasteurii is 0.5 - 2 g / L.

[0017] Further, the storage temperature range of the biological culture medium is 15 - 35 °C.

[0018] Further, in S5, the thickness of the backfilled sandy soil layer is 10 - 150 mm.

[0019] Further, in S4, the plant grass seeds are at least one of alfalfa, Suaeda salsa and Salicornia europaea.

[0020] In this solution, grass seeds that can adapt to sandy soil and have strong salt tolerance are selected. They have strong vitality and can continuously reinforce the slope soil mass.

[0021] In the second aspect, based on the slope reinforcement method based on geotechnical components and biological reinforcement technology provided in the first aspect, the present invention provides a device for implementing the slope reinforcement method based on geotechnical components and biological reinforcement technology, which specifically includes a storage tank and a grouting pump. The storage tank is filled with the biological culture medium inside, and the storage tank is connected to the grouting pump through a pipeline; a grouting pipe is arranged on the grouting pump.

[0022] Furthermore, the grouting pump controls the grouting flow rate of the biological culture medium to be 8 to 100 ml / min.

[0023] In the third aspect, the present invention provides a geotechnical component based on a slope reinforcement method based on geotechnical components and biological reinforcement technology provided in the first aspect; specifically, it includes several layers of geotextiles with a wavy structure, and the crests of two adjacent layers of geotextiles are connected; geocells are placed in the cavity formed at the troughs of two adjacent layers of geotextiles.

[0024] In this scheme, the geocell is arranged between two adjacent layers of geotextile to provide support strength for the geotextile in the vertical direction; several layers of geotextile are connected together to form a stable mesh frame, which can connect the slope as a whole when laid on the slope, effectively preventing the erosion and loss of the surface soil and realizing the physical reinforcement of the slope.

[0025] Furthermore, slurry circulation holes are provided on the side walls of the geotextile and the geocell.

[0026] In this solution, slurry flow holes are provided. When the biological culture medium is injected, the biological culture medium can flow to various places through the slurry flow holes, ensuring that every part of the slope can be penetrated by the biological culture medium.

[0027] The beneficial effects of the present invention are:

[0028] The slope reinforcement method based on geotechnical components and biological reinforcement technology provided by the present invention utilizes the mineralization effect of microorganisms, the solidification characteristics of plant roots and the physical reinforcement characteristics of geotechnical components, and combines these three reinforcement methods to effectively improve the stability of multi-soil layer slopes without destroying the natural ecological environment.

[0029] Geotechnical components are used as the basic material for reinforcing multi-layer slopes. They are laid on the surface of multi-layer slopes to form a structurally stable mesh framework that can effectively prevent erosion and loss of surface soil. The distribution of geotechnical components can not only enhance the slope's anti-erosion ability, but also disperse the external load to a certain extent, reduce the shear force of the soil, and thus improve the stability of the slope.

[0030] The mineralizing bacteria in the biological culture medium decompose urea and other substances, induce the deposition of minerals such as calcium carbonate, and form natural biomineralized crusts. These mineralized crusts form a bonding effect between soil particles, which can effectively enhance the cohesion of the soil, thereby improving the erosion resistance and shear strength of the slope. Compared with traditional chemical stabilizers, microbial mineralization reinforcement utilizes microorganisms and their metabolic processes in nature, reduces the use of harmful chemicals, and has higher environmental protection. In addition, the biological culture medium for cultivating mineralizing bacteria can provide the necessary moisture for the germination of salt-tolerant grass seeds. After germination, the plant grass seeds can effectively improve the stability of the slope by consolidating the soil through their roots. Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the reinforced slope structure in the present invention;

[0032] Figure 2 It is a schematic diagram of the slope reinforcement device structure based on geotechnical components and biological reinforcement technology in the present invention;

[0033] Figure 3 It is a schematic diagram of the partial structure of the geotechnical component in the present invention.

[0034] Reference Signs:

[0035] 101, multi-layer soil slope; 102, geotechnical component; 103, sandy soil layer; 104, vegetation; 201, grouting pump; 202, storage tank; 203, biological culture medium; 204, grouting pipe; 205, slurry flow hole; 206, geotextile; 207, geocell; Detailed Embodiments

[0036] The present invention will be further described below in conjunction with the drawings and specific embodiments. The following describes the specific embodiments of the present invention to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0037] Embodiment 1

[0038] As Figure 1 shown, this embodiment provides a slope reinforcement method based on geotechnical components and biological reinforcement technology. This method combines three reinforcement methods: mineralization reinforcement of microorganisms, solidification of plant roots, and physical reinforcement of geotechnical components. It can effectively improve the stability of multi-layer soil slopes without damaging the natural ecological environment; specifically includes the following steps:

[0039] S1: Configure the biological culture medium 203; dissolve urea, calcium chloride, ammonium chloride, soy peptone, Bacillus pasteurii, and nickel chloride in deionized water, stir and mix to obtain the biological culture medium 203;

[0040] The concentration of urea in the biological culture medium 203 is 10 - 30 g / L, the concentration of calcium chloride is 27 - 55.49 g / L, the concentration of soy peptone is 19 - 25 g / L, the concentration of ammonium chloride is 11.9 - 17 g / L, the concentration of nickel chloride is 0.11 - 0.3 g / L, and the concentration of Bacillus pasteurii is 0.5 - 2 g / L;

[0041] The storage temperature range of the biological culture medium 203 is 15 - 35°C.

[0042] S2: Before the formal reinforcement construction, trim the multi - layer soil slope 101; clean the loose soil layer and impurities on the slope, compact the soil body to ensure the smoothness of the soil matrix.

[0043] S3: Arrange the geotechnical components 102 section by section on the multi - layer soil slope 101 according to the design requirements, ensuring uniform laying and close contact with the slope soil layer, avoiding looseness, and ensuring its sufficient stability and tensile strength.

[0044] S4: Evenly spread salt - tolerant plant grass seeds on the geotechnical component 102. After sowing, gently pat or compact the geotechnical component 102 appropriately to ensure sufficient contact between the plant grass seeds and the soil, and promote the rooting of the plant grass seeds;

[0045] The plant grass seeds are at least one of alfalfa, Suaeda salsa, and Salicornia europaea.

[0046] S5: Timely backfill an appropriate amount of sandy soil layer 103. The sandy soil layer 103 covers the spread plant grass seeds and is appropriately compacted to provide a suitable environment for the growth of the plant grass seeds; the thickness of the sandy soil layer 103 is 10 - 150 mm.

[0047] S6: Inject the biological culture medium 203 onto the sandy soil layer 103. Start injecting from the top of the slope when injecting, ensuring that the biological culture medium 203 can evenly penetrate into the soil layer during the flowing process; keep the flow rate of the biological culture medium 203 stable during the injection process to ensure sufficient contact between the biological culture medium 203 and the plant grass seeds and the geotechnical components 102;

[0048] S7: Regularly check the reinforced slope to confirm the activity of the mineralizing bacteria; timely supplement the biological culture medium 203 as needed to ensure the activity of the mineralizing bacteria and the normal progress of the biomineralization process;

[0049] S8: Regularly check the germination, root development, and growth status of the plant grass seeds to ensure that the plant grass seeds can germinate normally and grow into vegetation 104; apply fertilizers and irrigate timely according to the growth of the vegetation 104 to ensure the stability of the growth environment of the grass seeds;

[0050] S9: After the reinforcement construction is completed, evaluate the slope stability and the ecological reinforcement effect; if there are unstable or unsatisfactory situations in local areas, repeat the reinforcement process of S6 - S9.

[0051] In this embodiment, Bacillus pasteurianus decomposes urea in the biological culture medium 203 through its own metabolic activities to produce carbonate ions. The carbonate ions and calcium ions form calcium carbonate precipitates. The calcium carbonate forms a crystal structure inside the soil and around the geotechnical component 102, filling the pores in the soil, thereby enhancing the integrity and strength of the slope and achieving slope reinforcement.

[0052] Example 2

[0053] like Figure 2 As shown, this embodiment is based on a slope reinforcement method based on geotechnical components and biological reinforcement technology provided in Example 1, and provides a device for implementing the slope reinforcement method based on geotechnical components and biological reinforcement technology, which specifically includes a storage tank 202 and a grouting pump 201, the storage tank 202 is filled with a biological culture medium 203, and the storage tank 202 is connected to the grouting pump 201 through a pipeline; a grouting pipe 204 is arranged on the grouting pump 201.

[0054] The grouting pump 201 controls the grouting flow rate of the biological culture medium 203 to be 8-100 ml / min.

[0055] Example 3

[0056] like Figure 2 and Figure 3 As shown, this embodiment provides a geotextile 102 based on a slope reinforcement method based on geotextile and biological reinforcement technology provided in Embodiment 1, and the geotextile 102 can physically reinforce the slope; it specifically includes several layers of geotextile 206 with a wavy structure, and the crests of two adjacent layers of geotextile 206 are connected; the cavity formed at the trough of two adjacent layers of geotextile 206 is filled with geocell 207. The geocell 207 is arranged between two adjacent layers of geotextile 206 to provide support strength for the geotextile 206 in the vertical direction; several layers of geotextile 206 are connected together, and when laid on the slope, the slope can be connected as a whole to achieve physical reinforcement of the slope.

[0057] Slurry flow holes 205 are provided on the side walls of the geotextile 206 and the geocell 207; when the biological culture medium 203 is injected, the biological culture medium 203 can flow to various places through the slurry flow holes 205, ensuring that every part of the slope can be penetrated by the biological culture medium 203.

[0058] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the invention.

Claims

1. A slope reinforcement method based on geotechnical components and bioremediation technology, characterized in that: It includes the following steps: S1: Configure a biological culture medium (203); S2: Trim the multi-layer soil slope (101); S3: Arrange geotechnical components (102) on the multi-layer soil slope (101); S4: Spread plant grass seeds on the geotechnical components (102); S5: Backfill a sandy soil layer (103) on the plant grass seeds to cover the plant grass seeds; S6: Inject the biological culture medium (203) onto the sandy soil layer (103).

2. The slope reinforcement method based on geotechnical components and bioremediation technology according to claim 1, characterized in that: In the above S1, dissolve urea, calcium chloride, ammonium chloride, soy peptone, Bacillus pasteurii, and nickel chloride in deionized water, stir and mix to obtain the biological culture medium.

3. The slope reinforcement method based on geotechnical components and bioremediation technology according to claim 2, characterized in that: In the biological culture medium, the concentration of urea is 10 - 30 g / L, the concentration of calcium chloride is 27 - 55.49 g / L, the concentration of soy peptone is 19 - 25 g / L, the concentration of ammonium chloride is 11.9 - 17 g / L, the concentration of nickel chloride is 0.11 - 0.3 g / L, and the concentration of Bacillus pasteurii is 0.5 - 2 g / L.

4. The slope reinforcement method based on geotechnical components and bioremediation technology according to claim 2, characterized in that: The storage temperature range of the biological culture medium (203) is 15 - 35 °C.

5. The slope reinforcement method based on geotechnical components and bio - reinforcement technology according to claim 1, wherein: The thickness of the backfilled sandy soil layer (103) in the above S5 is 10 - 150 mm.

6. The slope reinforcement method based on geotechnical components and bioremediation technology according to claim 1, characterized in that: The plant grass seeds in the above S4 are at least one of alfalfa, Suaeda salsa, and Salicornia europaea.

7. An apparatus for implementing the slope reinforcement method based on geotechnical components and bioremediation technology according to any one of claims 1 to 5, characterized in that: It includes a storage tank (202) and a grouting pump (201). The storage tank (202) is internally filled with the biological culture medium (203), and the storage tank (202) is connected to the grouting pump (201) through a pipeline; a grouting pipe (204) is arranged on the grouting pump (201).

8. The device of the slope reinforcement method based on geotechnical components and bioremediation technology according to claim 7, characterized in that: The grouting pump (201) controls the grouting flow rate of the biological culture medium (203) to be 8 - 100 ml / min.

9. A geotechnical component according to any one of claims 1 to 5, characterized in that: It includes several layers of geotextiles (206) with a wavy structure. The wave crests of adjacent two layers of the geotextiles (206) are connected; a geocell (207) is placed in the cavity formed at the wave troughs of adjacent two layers of the geotextiles (206).

10. The geotechnical component according to claim 9, characterized in that: Serum circulation holes (205) are formed on the side walls of the geotextiles (206) and the geocells (207).

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