An experimental device and method for simulating underwater anchor hole grouting filling

Abstract

The application provides an experimental device and method for simulating underwater anchor hole grouting filling, wherein an anchor hole simulation device is arranged in a water tank for simulating a water environment; a grouting anchor rod for grouting anchoring is arranged in the anchor hole simulation device; an opening end of the anchor hole simulation device is plugged by a rubber plug; the rubber plug is connected with a grouting device in communication through a grouting pipe; the grouting device is internally provided with magnetic mortar; a high-definition camera is arranged in front of the anchor hole simulation device, and diffusion of the slurry and water discharge in the anchor hole during the experiment are recorded, so as to facilitate subsequent experimental analysis. Through the device, the diffusion and filling of the magnetic slurry in the anchor hole under the action of magnetic attraction can be directly observed; the discharge rule of the water in the anchor hole under the grouting condition is understood; the influence of different grouting anchor rods on the anchor hole grouting filling is determined, so as to provide guidance for actual underwater anchor rod grouting filling.

Description

Technical Field

[0001] This invention relates to the technical field of grouting and filling rock masses, and particularly to an experimental apparatus and method for simulating underwater anchor tunnel grouting and filling. Background Technology

[0002] In recent years, with the development of construction projects in my country, the number of water conservancy dams, cross-sea and cross-river bridges has increased, and the implementation of bank protection and slope engineering has led to many projects developing cracks due to long-term corrosion caused by water and air. The experimental device and method for simulating underwater anchor grouting filling have been widely used in engineering construction due to their advantages such as convenient and quick construction, high cost-effectiveness, and good stability. They are particularly effective in repairing underwater rock fissures, bridge piers in water, building structures, and slope engineering, improving the overall integrity of the project. They play a crucial role in projects where concrete cracks and rock fissures are caused by the influence of air and water elements. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an experimental device and method for simulating underwater anchor hole grouting and filling, so as to solve the problem of damage to the project and the impact on the durability of the project caused by air bubbles generated during the repair process in rock crack repair projects. The device and technology provided by the present invention are simple and convenient to operate, and have broad engineering practical significance and application prospects.

[0004] To achieve the above-mentioned technical features, the objective of this invention is as follows: an experimental device for simulating underwater anchor hole grouting and filling, comprising an anchor hole simulation device for simulating anchor holes;

[0005] The anchor hole simulation device is installed inside a water tank used to simulate a water environment;

[0006] The internal structure of the anchor hole simulation device is equipped with grouting anchor rods for grouting anchoring;

[0007] The opening end of the anchor hole simulation device is sealed with a rubber plug;

[0008] The rubber plug is connected to the grouting equipment via a grouting pipe;

[0009] The grouting equipment is internally equipped with magnetic mortar;

[0010] A high-definition camera is installed directly in front of the anchor hole simulation device to record the diffusion of slurry and the process of water discharge from the anchor hole during the experiment, which is convenient for subsequent experimental analysis.

[0011] The anchor hole simulation device is made of transparent acrylic sheet material; the anchor hole simulation device is a hollow cylindrical structure with one end closed and the other end open, and the size of the central hole of the hollow cylindrical structure is determined according to the size of the drilled anchor hole.

[0012] Anchor holes are drilled in the rock using drilling equipment, and the debris inside is cleaned out. The drill bit of the drilling equipment adopts the grouting anchor rod used in engineering to ensure that the drilled anchor holes are more in line with the actual engineering situation.

[0013] Silicone is poured into the anchor hole drilled on the rock. After the silicone solidifies and hardens, it is removed and placed inside the anchor hole simulation device. A certain width gap is left between the hardened silicone and the anchor hole simulation device, and transparent resin is poured into the gap. After hardening, the hardened silicone model is removed, resulting in an anchor hole simulation device that accurately replicates the drilled anchor hole.

[0014] The rubber plug has pre-drilled holes for grouting anchor rods and drainage holes, the size of which matches the diameter of the anchor hole simulation device.

[0015] Grouting anchors are drilled with grouting holes at certain intervals, and magnetic rings are arranged in the middle of the grouting holes. The size of the grouting holes, the interval size, and the magnetic force of the magnetic rings can be adjusted according to experiments, thereby determining the grouting anchor with the best grouting effect.

[0016] The magnetic mortar is prepared by adding nano-iron powder, water-based epoxy resin, asphalt, defoamer and quick-setting agent to cement mortar in a certain proportion and then mixing them thoroughly. The mixing proportion is determined based on laboratory test results, but the basic properties of the magnetic mortar should be maintained.

[0017] Pigment and tap water are thoroughly mixed in a certain ratio to form a colored liquid. The prepared colored liquid is then poured into the anchor hole simulation device, and its opening is sealed with a rubber stopper.

[0018] The grouting anchor rod is placed inside the anchor hole simulation device through a pre-drilled hole in the rubber plug; the anchor hole simulation device is placed upside down in a water tank filled with clean water through a fixed bracket, and the grouting pipe is connected to the grouting anchor rod.

[0019] After the magnetic mortar has solidified and cured, the anchor hole simulation device is removed and a pull-out test is conducted. The experimental results are observed, recorded, and analyzed.

[0020] The experimental method for simulating underwater anchor hole grouting using an experimental setup includes the following steps:

[0021] Step 1. Material Preparation:

[0022] Prepare the following: anchor hole simulation device, water tank, grouting equipment, magnetic mortar, pigment, rubber stopper, silicone, grouting anchor rod, transparent acrylic sheet, transparent resin, magnetic ring, fixing bracket, drilling equipment and high-definition camera;

[0023] Step 2. Construct an anchor hole simulation device:

[0024] A cylindrical device with one end closed and the other end open is made of transparent acrylic sheet material, and the diameter of its hole is determined according to the size of the anchor hole drilled.

[0025] Step 3. Fabricate grouting anchor bolts:

[0026] Anchor holes are drilled in the rock using drilling equipment, and the debris inside is cleaned out. The drill bit of the drilling equipment adopts the grouting anchor rod used in engineering, ensuring that the drilled anchor holes are more in line with the actual engineering situation.

[0027] Step 4. Pour silicone into the drilled anchor hole, wait for it to solidify and harden, then remove it and place it inside the anchor hole simulation device; leave a certain width gap between the silicone and the anchor hole simulation device, pour transparent resin into the gap, wait for it to harden, then remove the silicone model to obtain a high-precision replica of the drilled anchor hole.

[0028] Step 5. The rubber plug is pre-drilled with holes for grouting anchor rods and drainage holes, the size of which matches the diameter of the anchor hole simulation device.

[0029] Step 6. Determine the grouting anchor with the best effect: Drill grouting holes for the grouting anchor at certain intervals, and place a magnetic ring in the middle of the grouting hole; the size of the grouting hole, the interval size and the magnetic force of the magnetic ring can be adjusted according to the experiment, thereby determining the grouting anchor with the best grouting effect;

[0030] Step 7. Prepare the magnetic mortar:

[0031] Magnetic mortar is made by adding nano iron powder, water-based epoxy resin, asphalt, defoamer and quick-setting agent to cement mortar in a certain proportion and mixing them thoroughly. The mixing proportion is determined based on laboratory test results, but the basic properties of magnetic mortar should be maintained.

[0032] Step 8. Prepare the colored liquid:

[0033] Pigment and tap water are thoroughly mixed in a certain ratio to form a colored liquid. The prepared colored liquid is then poured into the anchor hole simulation device, and its opening is sealed with a rubber stopper.

[0034] Step 9. Place the grouting anchor rod into the anchor hole simulation device through the pre-drilled hole in the rubber plug; place the anchor hole simulation device upside down into a water tank filled with clean water using a fixing bracket, and connect the grouting pipe to the grouting anchor rod;

[0035] Step 10. Set up a high-definition camera directly in front of the anchor hole simulation device to record the diffusion of slurry and the process of water discharge from the anchor hole during the experiment, which will facilitate subsequent experimental analysis.

[0036] Step 11. Inject the prepared magnetic mortar into the grouting equipment, connect the grouting instrument and the grouting pipe, and at the same time open the drainage hole and the high-definition camera on the rubber plug. Start the grouting equipment to conduct the anchor hole grouting experiment.

[0037] Step 12. After the magnetic mortar has solidified and cured, the anchor hole simulation device is removed and a pull-out test is conducted. The experimental results are observed, and records are made and analyzed.

[0038] The present invention has the following beneficial effects:

[0039] 1. By using experimental devices and methods to simulate underwater anchor grouting, air in the grout can be stably expelled, preventing the grout from diffusing in water and causing filling failure. This reduces the financial, human, and logistical costs of repeated construction, accelerates the construction process, saves time and costs, effectively prevents further damage to the project, and improves the overall integrity and durability of the project. Water vapor inside cracks plays a decisive role in crack repair, especially for micro-cracks. The devices and methods simulating underwater anchor grouting can achieve the desired filling effect in rock fissures, ensuring the integrity of the project.

[0040] 2. The present invention uses a self-designed visual anchor hole grouting simulation device. Its purpose is to: intuitively observe the diffusion and filling of magnetic grout inside the anchor hole under the action of magnetic attraction; understand the law of water being squeezed out of the anchor hole under grouting conditions; determine the influence of different grouting anchors on the grouting filling of the anchor hole; and thus provide guidance for underwater anchor grouting filling in actual engineering.

[0041] 3. The anchor hole grouting simulation device designed in this invention is based on the anchor hole drilled on site and replicated by a second mold, which ensures the authenticity of the grouting experiment and is more in line with actual engineering.

[0042] 4. The size and spacing of the grouting holes, the size of the magnetic ring and the magnitude of the magnetic force of the grouting anchor used in this invention can be adjusted. By observing and analyzing the grouting effect of the grouting anchor under different conditions, the optimal grouting anchor under different conditions can be determined.

[0043] 5. The magnetic grout used in this invention is used for grouting and filling inside the anchor hole. The purpose is that under the action of the magnetic ring, the grout is filled more densely under the action of the magnetic field force. At the same time, the influence of the magnetic field adsorption force increases the internal friction between grout particles and increases its viscosity, thereby improving the grout's anti-dispersion and anti-erosion ability in the underwater environment and ensuring the density of the filling.

[0044] 6. The liquid filling the grouting anchor hole device of the present invention is distinguished from the liquid in the water tank, so as to better observe and analyze the process of the internal water being squeezed out by the grout. Attached Figure Description

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0046] Figure 1 This is a schematic diagram of the overall device of the present invention.

[0047] Figure 2 This is a schematic diagram of the anchor bolt of the present invention.

[0048] Figure 3 This is a cross-sectional schematic diagram of the anchor hole simulation device of the present invention.

[0049] In the diagram: 1. Anchor hole simulation device; 2. Water tank; 3. Grouting equipment; 4. Magnetic mortar; 6. Rubber plug; 8. Grouting anchor rod; 10. Transparent resin; 11. Magnetic ring; 12. Fixing bracket; 14. High-definition camera. Detailed Implementation

[0050] Example 1:

[0051] Please see Figures 1-3 An experimental device for simulating underwater anchor hole grouting and filling includes an anchor hole simulation device 1, which is installed inside a water tank 2 simulating a water environment. The anchor hole simulation device 1 contains grouting anchor rods 8 for grouting and anchoring. The open end of the anchor hole simulation device 1 is sealed with a rubber plug 6. The rubber plug 6 is connected to a grouting device 3 via a grouting pipe. Magnetic mortar 4 is installed inside the grouting device 3. A high-definition camera 14 is positioned directly in front of the anchor hole simulation device 1 to record the diffusion of the grout and the process of water discharge from the anchor hole during the experiment, facilitating subsequent experimental analysis. This device allows for direct observation of the diffusion and filling of the magnetic grout inside the anchor hole under magnetic attraction; understanding the pattern of water being squeezed out of the anchor hole under grouting conditions; and determining the influence of different grouting anchor rods on the grouting and filling of the anchor hole, thus providing guidance for underwater anchor grouting and filling in practical engineering projects.

[0052] Furthermore, the anchor hole simulation device 1 is made of transparent acrylic sheet material; the anchor hole simulation device 1 is a hollow cylindrical structure with one end closed and the other end open, and the size of the central hole of the hollow cylindrical structure is determined according to the size of the drilled anchor hole. The anchor hole simulation device 1 facilitates observation of the internal grouting process during the experiment.

[0053] Furthermore, drilling equipment 3 is used to drill anchor holes in the rock, and the internal debris is cleaned out. The drill bit of drilling equipment 3 adopts the grouting anchor rod used in engineering to ensure that the drilled anchor holes are more in line with the actual engineering situation. Silicone is poured into the anchor holes drilled in the rock, and after the silicone has solidified and hardened, it is removed and placed inside the anchor hole simulation device 1. A certain width gap is left between the hardened silicone and the anchor hole simulation device 1, and transparent resin 10 is poured into the gap. After hardening, the hardened silicone model is removed, resulting in the anchor hole simulation device 1, which accurately replicates the drilled anchor holes. The above-mentioned anchor hole simulation device 1 can be used to simulate anchor holes in real environments.

[0054] Furthermore, the rubber plug 6 has pre-drilled holes for grouting anchor rods 8 and drainage holes, the size of which matches the diameter of the anchor hole simulation device 1. The rubber plug 6 facilitates the sealing of the open end of the anchor hole simulation device 1.

[0055] Furthermore, grouting anchor rod 8 has grouting holes drilled at certain intervals, and a magnetic ring 11 is arranged in the middle of the grouting holes; the size of the grouting holes, the spacing, and the magnetic force of the magnetic ring 11 can be adjusted according to experiments, thereby determining the grouting anchor rod 8 with the best grouting effect. The grouting anchor rod 8 described above facilitates the simulation of the subsequent grouting process.

[0056] Furthermore, the magnetic mortar 4 is prepared by thoroughly mixing nano-iron powder, water-based epoxy resin, asphalt, defoamer, and quick-setting agent into cement mortar in a certain proportion. The mixing proportion is determined based on laboratory test results, but the basic properties of the magnetic mortar 4 should be maintained. The aforementioned magnetic mortar 4 facilitates the simulation of the magnetic grouting process, thus facilitating its interaction with the magnetic ring 11 and enhancing the grouting effect.

[0057] Furthermore, the pigment and tap water are thoroughly mixed in a certain ratio to form a colored liquid, and the prepared colored liquid is poured into the anchor hole simulation device 1, and its opening is sealed with a rubber stopper 6.

[0058] Furthermore, the grouting anchor rod 8 is arranged inside the anchor hole simulation device 1 through the pre-drilled hole on the rubber plug 6; the anchor hole simulation device 1 is inverted and arranged in the water tank 2 filled with clean water through the fixing bracket 12, and the grouting pipe is connected to the grouting anchor rod 8.

[0059] Furthermore, after the magnetic mortar 4 has solidified and cured, the anchor hole simulation device 1 is removed and a pull-out test is conducted to observe the experimental results and record and analyze them.

[0060] Example 2:

[0061] The experimental method for simulating underwater anchor hole grouting using an experimental setup includes the following steps:

[0062] Step 1. Material Preparation:

[0063] Prepare the following: anchor hole simulation device, water tank, grouting equipment, magnetic mortar, pigment, rubber stopper, silicone, grouting anchor rod, transparent acrylic sheet, transparent resin, magnetic ring, fixing bracket, drilling equipment and high-definition camera;

[0064] Step 2. Construct an anchor hole simulation device:

[0065] A cylindrical device with one end closed and the other end open is made of transparent acrylic sheet material, and the diameter of its hole is determined according to the size of the anchor hole drilled.

[0066] Step 3. Fabricate grouting anchor bolts:

[0067] Anchor holes are drilled in the rock using drilling equipment, and the debris inside is cleaned out. The drill bit of the drilling equipment adopts the grouting anchor rod used in engineering, ensuring that the drilled anchor holes are more in line with the actual engineering situation.

[0068] Step 4. Pour silicone into the drilled anchor hole, wait for it to solidify and harden, then remove it and place it inside the anchor hole simulation device; leave a certain width gap between the silicone and the anchor hole simulation device, pour transparent resin into the gap, wait for it to harden, then remove the silicone model to obtain a high-precision replica of the drilled anchor hole.

[0069] Step 5. The rubber plug is pre-drilled with holes for grouting anchor rods and drainage holes, the size of which matches the diameter of the anchor hole simulation device.

[0070] Step 6. Determine the grouting anchor with the best effect: Drill grouting holes for the grouting anchor at certain intervals, and place a magnetic ring in the middle of the grouting hole; the size of the grouting hole, the interval size and the magnetic force of the magnetic ring can be adjusted according to the experiment, thereby determining the grouting anchor with the best grouting effect;

[0071] Step 7. Prepare the magnetic mortar:

[0072] Magnetic mortar is made by adding nano iron powder, water-based epoxy resin, asphalt, defoamer and quick-setting agent to cement mortar in a certain proportion and mixing them thoroughly. The mixing proportion is determined based on laboratory test results, but the basic properties of magnetic mortar should be maintained.

[0073] Step 8. Prepare the colored liquid:

[0074] Pigment and tap water are thoroughly mixed in a certain ratio to form a colored liquid. The prepared colored liquid is then poured into the anchor hole simulation device, and its opening is sealed with a rubber stopper.

[0075] Step 9. Place the grouting anchor rod into the anchor hole simulation device through the pre-drilled hole in the rubber plug; place the anchor hole simulation device upside down into a water tank filled with clean water using a fixing bracket, and connect the grouting pipe to the grouting anchor rod;

[0076] Step 10. Set up a high-definition camera directly in front of the anchor hole simulation device to record the diffusion of slurry and the process of water discharge from the anchor hole during the experiment, which will facilitate subsequent experimental analysis.

[0077] Step 11. Inject the prepared magnetic mortar into the grouting equipment, connect the grouting instrument and the grouting pipe, and at the same time open the drainage hole and the high-definition camera on the rubber plug. Start the grouting equipment to conduct the anchor hole grouting experiment.

[0078] Step 12. After the magnetic mortar has solidified and cured, the anchor hole simulation device is removed and a pull-out test is conducted. The experimental results are observed, and records are made and analyzed.

Claims

1. An experimental method for simulating underwater anchor hole grouting and filling, comprising an experimental device for simulating underwater anchor hole grouting and filling, wherein the experimental device includes an anchor hole simulation device (1) for simulating anchor holes. The anchor hole simulation device (1) is installed inside the water tank (2) used to simulate the water environment; The anchor hole simulation device (1) is equipped with a grouting anchor rod (8) for grouting anchoring. The opening end of the anchor hole simulation device (1) is sealed by a rubber plug (6); The rubber plug (6) is connected to the grouting equipment (3) through the grouting pipe; The grouting equipment (3) is equipped with magnetic mortar (4). A high-definition camera (14) is set in front of the anchor hole simulation device (1) to record the diffusion of slurry and the process of water discharge from the anchor hole during the experiment, which is convenient for subsequent experimental analysis. Its features are, The experimental method includes the following steps: Step 1. Material Preparation: Prepare the following: anchor hole simulation device, water tank, grouting equipment, magnetic mortar, pigment, rubber stopper, silicone, grouting anchor rod, transparent acrylic sheet, transparent resin, magnetic ring, fixing bracket, drilling equipment and high-definition camera; Step 2. Construct an anchor hole simulation device: A cylindrical device with one end closed and the other end open is made of transparent acrylic sheet material, and the diameter of its hole is determined according to the size of the anchor hole drilled. Step 3. Fabricate grouting anchor bolts: Anchor holes are drilled in the rock using drilling equipment, and the debris inside is cleaned out. The drill bit of the drilling equipment adopts the grouting anchor rod used in engineering, ensuring that the drilled anchor holes are more in line with the actual engineering situation. Step 4. Pour silicone into the drilled anchor hole, wait for it to solidify and harden, then remove it and place it inside the anchor hole simulation device; leave a certain width gap between the silicone and the anchor hole simulation device, pour transparent resin into the gap, wait for it to harden, then remove the silicone model to obtain a high-precision replica of the drilled anchor hole. Step 5. The rubber plug is pre-drilled with holes for grouting anchor rods and drainage holes, the size of which matches the diameter of the anchor hole simulation device. Step 6. Determine the grouting anchor with the best effect: Drill grouting holes for the grouting anchor at certain intervals, and place a magnetic ring in the middle of the grouting hole; the size of the grouting hole, the interval size and the magnetic force of the magnetic ring can be adjusted according to the experiment, thereby determining the grouting anchor with the best grouting effect; Step 7. Prepare the magnetic mortar: Magnetic mortar is made by adding nano iron powder, water-based epoxy resin, asphalt, defoamer and quick-setting agent to cement mortar in a certain proportion and then mixing them thoroughly. Step 8. Prepare the colored liquid: Pigment and tap water are thoroughly mixed in a certain ratio to form a colored liquid. The prepared colored liquid is then poured into the anchor hole simulation device, and its opening is sealed with a rubber stopper. Step 9. Place the grouting anchor rod into the anchor hole simulation device through the pre-drilled hole in the rubber plug; place the anchor hole simulation device upside down into a water tank filled with clean water using a fixing bracket, and connect the grouting pipe to the grouting anchor rod; Step 10. Set up a high-definition camera directly in front of the anchor hole simulation device to record the diffusion of slurry and the process of water discharge from the anchor hole during the experiment, which will facilitate subsequent experimental analysis. Step 11. Inject the prepared magnetic mortar into the grouting equipment, connect the grouting instrument and the grouting pipe, and at the same time open the drainage hole and the high-definition camera on the rubber plug. Start the grouting equipment to conduct the anchor hole grouting experiment. Step 12. After the magnetic mortar has solidified and cured, the anchor hole simulation device is removed and a pull-out test is conducted. The experimental results are observed, and records are made and analyzed.

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