Grounding body trenchless laying construction method for highly corrosive region

Abstract

The invention discloses a non-excavation laying construction method for a grounding body in a highly corrosive region. The non-excavation laying construction method comprises the following steps: acquiring soil resistivity distribution data in a grounding body construction position range; determining a laying path of the grounding body based on the soil resistivity distribution data; a plurality of guide holes are formed in a soil body, a first resistance reducing agent is injected into surface soil of the soil body through the guide holes so as to improve the conductivity of the soil, and a second resistance reducing agent is injected into deep soil of the soil body so as to reduce the corrosivity of the soil; mixing the upper part of the surface soil through a high-pressure jet grouting technology, so that the first resistance reducing agent is mixed with the surface soil to form an artificial low-resistance layer; and a grounding body is laid at the bottom of the artificial low-resistance layer in a non-excavation mode through a pipe jacking machine. The construction method solves the problems that an existing construction method of the grounding system is large in excavation work amount, and the system performance is prone to decline in the soil environment with high corrosion and high resistivity.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly relates to a trenchless laying construction method for a grounding body in a strongly corrosive area. Background Art

[0002] Traditional construction methods for grounding systems face many difficulties in soil environments with strong corrosion and high resistivity. For example, in areas such as deserts and gobi, due to the high soil resistivity and strong corrosiveness, traditional grounding systems are easily corroded by the soil, resulting in a decline in system performance or even failure. Moreover, traditional construction methods often require a large amount of excavation, leading to a long construction period, high construction costs, and a greater impact on the environment. Existing trenchless construction methods mainly focus on fields such as pipeline laying, and there is a lack of trenchless construction technology for grounding systems. Therefore, there is an urgent need for a new trenchless construction method to solve these problems. Summary of the Invention

[0003] In order to overcome the defects of the prior art, a trenchless laying construction method for a grounding body in a strongly corrosive area is provided to solve the problems that the existing construction method for the grounding system has a large amount of excavation work and the system performance is prone to decline in soil environments with strong corrosion and high resistivity.

[0004] To achieve the above object, a trenchless laying construction method for a grounding body in a strongly corrosive area is provided, including the following steps:

[0005] Obtain the soil resistivity distribution data within the construction position range of the grounding body;

[0006] Based on the soil resistivity distribution data, determine the laying path of the grounding body;

[0007] Open a plurality of pilot holes in the soil body and inject a first resistance reducing agent into the surface soil of the soil body through the pilot holes to improve the conductivity of the soil, and inject a second resistance reducing agent into the deep soil of the soil body to reduce the corrosiveness of the soil;

[0008] Mix the upper part of the surface soil through high-pressure jet grouting technology so that the first resistance reducing agent is mixed with the surface soil to form an artificial low-resistance layer;

[0009] Use a pipe jacking machine to lay the grounding body in a trenchless manner at the bottom of the artificial low-resistance layer.

[0010] Further, use ground penetrating radar to detect the soil body within the construction position range of the grounding body to obtain the soil resistivity distribution data.

[0011] Further, after obtaining the soil resistivity distribution data, a three-dimensional model of the soil resistivity is established using the soil resistivity distribution data, and based on the design requirements of the grounding body and the three-dimensional model, the laying path is determined.

[0012] Further, the first resistance reducing agent is a highly conductive graphene-carbon fiber composite slurry.

[0013] Further, the second resistance reducing agent is a slow-release nano zinc oxide gel.

[0014] Further, a laser guiding system is installed on the pipe jacking machine.

[0015] Further, the joints of the grounding body are connected by a hydraulic pressing process.

[0016] Further, the pilot hole is opened in the soil body by a directional drill. First, the first resistance reducing agent is sprayed to form a surface resistance reducing agent layer, and then the second resistance reducing agent is sprayed to form a deep resistance reducing agent layer. The two layers of resistance reducing agents penetrate each other to enhance the grounding effect.

[0017] The beneficial effects of the present invention are as follows. The trenchless laying construction method of the grounding body for strongly corrosive areas of the present invention forms an artificial low-resistance layer through technical means such as directional drilling, double-layer resistance reducing agent spraying, high-pressure jet mixing, and trenchless laying, effectively reducing the grounding resistance, improving the grounding performance, and also being able to avoid large-scale excavation. At the same time, the construction time is greatly shortened. The trenchless construction reduces the disturbance to the ground surface and improves the construction efficiency. The trenchless laying construction method of the grounding body for strongly corrosive areas of the present invention reduces the excavation operation, protects the surface vegetation and ecological environment. The trenchless laying construction method of the grounding body for strongly corrosive areas of the present invention forms a low-resistance area through the double-layer resistance reducing agent and high-pressure jet technology to enhance the grounding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes, and advantages of the present application will become more obvious:

[0019] Figure 1 It is a schematic flow chart of the trenchless laying construction method of the grounding body for strongly corrosive areas of the embodiment of the present invention.

[0020] Figure 2 It is a schematic flow chart of the establishment of the three-dimensional model of the soil resistivity of the embodiment of the present invention.

[0021] Figure 3 It is a schematic structural diagram of the artificial low-resistance layer of the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant invention and do not limit the invention. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0024] Referring to Figures 1 to 3 As shown, the present invention provides a trenchless laying construction method for grounding bodies in strongly corrosive areas, including the following steps:

[0025] S1. Obtain the soil resistivity distribution data within the construction position range of the grounding body.

[0026] Specifically, use a ground penetrating radar to detect the soil within the construction position range of the grounding body to obtain the soil resistivity distribution data.

[0027] S2. Based on the soil resistivity distribution data, determine the laying path of the grounding body.

[0028] Specifically, after obtaining the soil resistivity distribution data, use the soil resistivity distribution data to establish a three-dimensional model of the soil resistivity, and based on the design requirements of the grounding body and the three-dimensional model, determine the laying path.

[0029] Before construction, use a ground penetrating radar to detect the construction path to obtain the soil resistivity distribution data. Use professional software to process the data to generate a three-dimensional model of the soil resistivity, providing a basis for subsequent construction.

[0030] S3. Open a plurality of pilot holes in the soil and inject a first resistance reducing agent into the surface soil 2 of the soil to improve the conductivity of the soil, and inject a second resistance reducing agent into the deep soil 3 of the soil to reduce the corrosiveness of the soil.

[0031] In this embodiment, the first resistance reducing agent is a highly conductive graphene-carbon fiber composite slurry. The resistivity of the highly conductive graphene-carbon fiber composite slurry ≤ 0.1 Ω·m.

[0032] The second resistance reducing agent is a slow-release nano zinc oxide gel, with a pH value of 9 - 10.

[0033] S4. Mix the upper part of the surface soil through the high-pressure jet grouting technique so that the first resistance reducing agent is mixed with the surface soil to form an artificial low-resistance layer 1.

[0034] A pilot hole is drilled in the soil by a directional drilling rig. First, a first resistance-reducing agent is sprayed to form a surface resistance-reducing agent layer, and then a second resistance-reducing agent is sprayed to form a deep resistance-reducing agent layer. The two layers of resistance-reducing agents penetrate each other to enhance the grounding effect.

[0035] Using the high-pressure jet grouting technology, the gobi gravel in the surface soil of the soil is mixed with the resistance-reducing agent to form an artificial low-resistance layer. The overall resistivity of this area is ≤150 Ω·m, meeting the grounding requirements.

[0036] S5. Use a pipe jacking machine to lay the grounding electrode 4 at the bottom of the artificial low-resistance layer in a trenchless manner.

[0037] Adopt a trenchless construction method to lay the grounding electrode in the pre-formed artificial low-resistance layer to ensure the continuity and stability of the grounding system.

[0038] Through the above steps, the grounding electrode can be accurately laid to the predetermined position without damaging the ground surface, ensuring the effectiveness and long-term stable operation of the grounding system.

[0039] In this embodiment, a laser guidance system is installed on the pipe jacking machine. Through the laser guidance system (accuracy ±1 cm), the grounding electrode is laid synchronously along the inner side of the pipe wall.

[0040] As a preferred implementation manner, the joints of the grounding electrode are connected by a hydraulic press-fitting process.

[0041] After the grounding electrode is laid, the joints are connected by a hydraulic press-fitting process to ensure that the joint resistance is ≤1.2 times the body resistance.

[0042] Connection method: Use a hydraulic press-fitting device to apply a pressure ≥50 MPa to ensure the tight connection between the joint and the grounding electrode.

[0043] Quality control: The resistance of each connection point needs to be tested to ensure that the joint resistance meets the design requirements.

[0044] Through the hydraulic press-fitting connection, ensure the stable and reliable electrical connection between all parts of the grounding system, meeting the requirements of long-term operation.

[0045] As a preferred implementation manner, a current sensor for collecting corrosion current is installed on the grounding electrode, and a radio frequency tag is installed on the anode of the grounding electrode.

[0046] To ensure the long-term effectiveness of the grounding system during use, a built-in corrosion current sensor monitors the consumption status of the anode in real time.

[0047] The current sensor continuously monitors the corrosion current of the anode. When the remaining amount of the zinc block is less than 30%, the system automatically issues a replacement prompt.

[0048] Locate through the RFID tags set on the anode, remotely replace the anode module using a directional drilling rig, and easily and quickly find the anode without excavation, reducing maintenance costs and environmental impact.

[0049] The introduction of the self-healing mechanism ensures that the grounding system can detect and solve potential problems in a timely manner during long-term use, extending the service life of the system.

[0050] The trenchless laying construction method of the grounding body for strongly corrosive areas of the present invention is applicable to the trenchless construction method of the grounding system in strongly corrosive and high-resistivity areas. While improving the grounding performance and extending the service life, it reduces the construction cost, and has the advantages of high construction efficiency, small environmental impact, excellent grounding performance and convenient maintenance.

[0051] The above description is only the preferred embodiment of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solution formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. A trenchless laying construction method for grounding electrodes in highly corrosive areas, characterized in that, It includes the following steps: Obtain the soil resistivity distribution data within the construction location range of the grounding electrode; Based on the soil resistivity distribution data, determine the laying path of the grounding electrode; Open a plurality of guide holes in the soil body and inject a first resistance reducing agent into the surface soil of the soil body through the guide holes to improve the conductivity of the soil, and inject a second resistance reducing agent into the deep soil of the soil body to reduce the corrosion of the soil; Mix the upper part of the surface soil through the high-pressure jet grouting technology, so that the first resistance reducing agent is mixed with the surface soil to form an artificial low-resistance layer; Use a pipe jacking machine to lay the grounding electrode at the bottom of the artificial low-resistance layer in a trenchless manner.

2. The construction method for trenchless laying of grounding electrodes used in highly corrosive areas according to claim 1, wherein Use ground penetrating radar to detect the soil body within the construction location range of the grounding electrode to obtain the soil resistivity distribution data.

3. The construction method for trenchless laying of grounding electrodes used in strongly corrosive areas according to claim 2, characterized in that, After obtaining the soil resistivity distribution data, establish a three-dimensional model of the soil resistivity by using the soil resistivity distribution data, and determine the laying path based on the design requirements of the grounding electrode and the three-dimensional model.

4. The trenchless laying construction method of the grounding electrode for strong corrosion areas according to claim 1, characterized in that, The first resistance reducing agent is a highly conductive graphene-carbon fiber composite slurry.

5. The trenchless laying construction method of the grounding electrode for a strongly corrosive area according to claim 1, characterized in that, The second resistance reducing agent is a slow-release nano-zinc oxide gel.

6. The trenchless laying construction method of the grounding electrode for strongly corrosive areas according to claim 1, characterized in that, A laser guiding system is installed on the pipe jacking machine.

7. The trenchless laying construction method of the grounding electrode for strongly corrosive areas according to claim 1, characterized in that The joints of the grounding electrode are connected by a hydraulic pressing process.

8. The trenchless laying construction method of the grounding electrode for strongly corrosive areas according to claim 1, characterized in that, Open the guide holes in the soil body through a directional drilling rig, first spray the first resistance reducing agent to form a surface resistance reducing agent layer, and then spray the second resistance reducing agent to form a deep resistance reducing agent layer, and the two layers of resistance reducing agents penetrate each other to enhance the grounding effect.

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