High-viscosity grouting reinforcement material as well as preparation method and application thereof
By preparing high-viscosity grouting reinforcement materials composed of P42.5 cement and other materials, the problems of small diffusion radius and poor cementitivity of cement-based materials in high-mud soft rock tunnels are solved, and the stability of the tunnel surrounding rocks is achieved and The air leakage prevention effect reduces the water dissipation rate and ensures the long-term stability of the tunnel.
Patent Information
- Application Number
- CN202411298858.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2024-12-27
AI Technical Summary
The existing cement-based materials have a small diffusion radius, poor cementability, high water dissipation rate in grouting and reinforcement of high mud soft rock tunnels, and are highly costly in chemical materials, prone to ignition and pollute the environment, making it difficult to meet the long-term stability of tunnel support. need.
Using high viscosity grouting reinforcement materials composed of P42.5 cement, fly ash, alum stone powder, cellulose ether, bentonite and polycarboxylic acid water reducing agent, slurry is prepared by mixing and stirring, which is suitable for tunnels of muddy soft rocks. Grouting reinforcement provides better permeability and adhesion.
It achieves better permeability and adhesion in muddy soft rocks, reduces the water dissipation rate, enhances the cementing ability of the surrounding rocks of the tunnel, ensures the long-term stability of the tunnel, and effectively blocks cracks to prevent air leakage and weathering.
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Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of grouting reinforcement, and specifically relates to a high-viscosity grouting reinforcement material and a preparation method and application thereof. Background Art
[0002] When tunneling high-shale soft rock tunnels or repairing large deformation tunnels, in order to ensure the long-term stability of tunnel support, the "anchor grouting reinforcement technology" is often used for tunnel maintenance, that is, after anchor mesh support, grouting reinforcement is carried out at an appropriate time. When using this technology, cement-based materials are often used as grouting materials. However, the practice of grouting reinforcement of high-shale soft rock tunnels has proved that cement slurry has a small diffusion radius, poor cementation, and high water separation rate in the cracks of shale soft rocks. It is not only difficult to play a grouting reinforcement role for expansive rock formations, but it may even bring great negative effects; for grouting reinforcement using chemical materials, the cost is high, the heat generated by the reaction can easily induce coal seam fires, and pollute the environment. Summary of the invention
[0003] In view of the problems in the prior art, the present invention provides a high-viscosity grouting reinforcement material and a preparation method and application thereof.
[0004] In order to achieve the above purpose, the technical solution adopted in this application is: A high-viscosity grouting reinforcement material, wherein the raw materials of the high-viscosity grouting reinforcement material are composed of the following raw materials in parts by weight: 450-600 parts of P42.5 cement, 50-100 parts of fly ash, 120-160 parts of alum stone powder, 2-3 parts of cellulose ether, 150-200 parts of bentonite and 3-4 parts of polycarboxylic acid water reducer.
[0005] Preferably, the water-cement ratio of the high-viscosity grouting reinforcement material is 1:1.
[0006] A method for preparing a high-viscosity grouting reinforcement material, the specific operating steps are as follows: The raw materials of high-viscosity grouting reinforcement material are mixed and stirred evenly to prepare high-viscosity grouting reinforcement material slurry.
[0007] The invention discloses an application of a high-viscosity grouting reinforcement material in grouting reinforcement of tunnels in soft surrounding rock conditions such as clay rock, shale and mudstone containing expansive minerals.
[0008] A high-viscosity grouting reinforcement material is used in grouting plugging or tunnel surface spraying plugging under the conditions of preventing air leakage or gas outburst in small coal pillar mining tunnels.
[0009] A high-viscosity grouting reinforcement material is used for delayed grouting reinforcement of newly excavated soft rock tunnels to change the creep characteristics of weak surrounding rocks, increase the anchoring force of anchor rods or anchor cables, and ensure the long-term stability of the tunnel.
[0010] The invention discloses an application of a high viscosity grouting reinforcement material in grouting reinforcement of large deformation chambers.
[0011] Compared with the prior art, the advantages and positive effects of the present invention are: The present application discloses a high-viscosity grouting reinforcement material, a preparation method thereof and an application thereof; the prepared high-viscosity grouting reinforcement material has the following advantages: 1. Good slow setting property, easy to flow, convenient for grouting, and an initial setting time of 4h; 2. Large penetration (diffusion) radius, suitable for grouting reinforcement of small cracks in soft mudstone, with a particle fineness of 0.0045mm; 3. Strong adhesion, which can be used for reinforcement of surrounding rocks of various tunnels, especially for soft and weak composite roof conditions of mudstone; 4. Micro-expansion (expansion coefficient 1.02), after grouting, the micro-expansion property can form a stronger bonding ability with the surrounding rock; 5. The water separation rate of the material is low, which can reduce the influence of water on the strength of mudstone; 6. The material has high density and strong adhesion, which can effectively block the cracks on the surface of the tunnel, and play a role in preventing air leakage, weathering and metal mesh corrosion; 7. Good wettability, the grouting material is combined with the loose surrounding rock under high pressure, which is more conducive to forming a whole.
[0012] The high-viscosity grouting reinforcement material of the present application has a wide range of applications: 1. It is suitable for grouting reinforcement of tunnels with soft surrounding rock conditions such as clay rock, shale and mudstone containing expansive minerals; 2. It is suitable for grouting plugging or tunnel surface spraying plugging under conditions of air leakage or gas outburst in small coal pillar mining tunnels; 3. It is suitable for delayed grouting reinforcement of newly excavated soft rock tunnels to change the creep characteristics of soft surrounding rocks, increase the anchoring force of anchor rods (cables), and ensure the long-term stability of tunnels; 4. It is suitable for grouting reinforcement of large deformation chambers. DETAILED DESCRIPTION
[0013] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0014] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.
[0015] Example 1, a high-viscosity grouting reinforcement material and its preparation method and application in the present application.
[0016] A high-viscosity grouting reinforcement material, wherein the raw materials of the high-viscosity grouting reinforcement material are composed of the following raw materials in parts by weight: 520 parts of P42.5 cement, 75 parts of fly ash, 130 parts of alum stone powder, 2 parts of cellulose ether, 150 parts of bentonite and 3 parts of polycarboxylic acid water reducer.
[0017] The specific preparation method is as follows: mixing high viscosity grouting reinforcement material raw materials and water and stirring them evenly to prepare high viscosity grouting reinforcement material slurry; The mechanical properties of the above-mentioned high viscosity grouting reinforcement material slurry and common cement slurry on the market were tested, and the comparison results are shown in Table 1 below. Table 1 Comparison of main technical indicators of high-adhesion grouting materials and cement slurry
[0018] It can be seen from Table 1 that the various mechanical performance indicators of the high-viscosity grouting reinforcement material of the present application are far greater than those of cement slurry.
[0019] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. A high viscosity grouting reinforcement material, characterized in that: The raw materials of the high-viscosity grouting reinforcement material are composed of the following raw materials in parts by weight: 450-600 parts of P42.5 cement, 50-100 parts of fly ash, 120-160 parts of alum stone powder, 2-3 parts of cellulose ether, 150-200 parts of bentonite and 3-4 parts of polycarboxylic acid water reducer.
2. A high viscosity grouting reinforcement material according to claim 1, characterized in that: The water-cement ratio of the high-viscosity grouting reinforcement material is 1:
1.
3. The method for preparing a high-viscosity grouting reinforcement material according to claim 2, characterized in that: The specific steps are as follows: The raw materials of high-viscosity grouting reinforcement material are mixed and stirred evenly to prepare high-viscosity grouting reinforcement material slurry.
4. Application of the high viscosity grouting reinforcement material according to claim 2 in grouting reinforcement of tunnels in soft surrounding rock conditions such as clay rock, shale and mudstone containing expansive minerals.
5. Application of a high-viscosity grouting reinforcement material according to claim 2 in grouting plugging or tunnel surface spraying plugging under conditions of air leakage or gas outburst in small coal pillar mining tunnels.
6. The high viscosity grouting reinforcement material according to claim 2 is used for delayed grouting reinforcement of newly excavated soft rock tunnels to change the creep characteristics of weak surrounding rocks, increase the anchoring force of anchor rods or anchor cables, and ensure the long-term stable application of the tunnel.
7. Application of a high viscosity grouting reinforcement material according to claim 2 in grouting reinforcement of large deformation chambers.