CN117947735A - Ocean cavity repairing method based on dynamic water condition - Google Patents
Ocean cavity repairing method based on dynamic water condition Download PDFInfo
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- CN117947735A CN117947735A CN202410193811.1A CN202410193811A CN117947735A CN 117947735 A CN117947735 A CN 117947735A CN 202410193811 A CN202410193811 A CN 202410193811A CN 117947735 A CN117947735 A CN 117947735A
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Abstract
A method based on marine cavity repair under hydrodynamic conditions, the method comprising the steps of: preparing magnetic attractors such as permanent magnet blocks, recyclable magnetic hollow anchor rods and magnetic slurry; secondly, carrying out underwater surveying, knowing the appearance of the cavity to be repaired through radar or ultrasonic scanning, and adopting different schemes aiming at cavities with different shapes; thirdly, aiming at different schemes, placing a magnetic attraction body in the cavity, then injecting magnetic slurry, magnetically adsorbing the slurry, and completing repair after solidification; aiming at different sea cavity forms, the invention provides a plurality of sea cavity repairing methods based on the dynamic water condition, the excellent performance, good fluidity and fine texture of the magnetic slurry are generally utilized, and when the grouting is used for repairing, the fine gaps among the magnetic attractors can be perfectly filled without jolting.
Description
Technical Field
The invention relates to the technical field of coastal cavity repair, in particular to a method for repairing a marine cavity under a dynamic water condition.
Background
In many coastal areas, the phenomenon of sea water erosion is increasingly serious due to construction of barrages, beach reclamation, mass exploitation of beach sand, coral reefs, deforestation, improper coast engineering settings and the like. A large number of cavities are present on the coast of many areas, which are repeatedly flushed with seawater for a long time. This not only engulfs the land and destroys the coastal travel resources, but, more seriously, it is highly likely that the lives and properties of local people and production are severely threatened. Therefore, some control measures have to be taken. Because the periphery of the cavity is uneven, the traditional template is difficult to isolate and repair. In addition, the general repair mortar is easy to diffuse in seawater, does not resist scouring, and is very easy to be corroded secondarily in the seawater environment with high sulfate. Therefore, we can perform three-dimensional scanning by radar or ultrasonic technology, and analyze the appearance of the cavity in advance before construction. Different methods are adopted to repair the different cavities.
For example, CN115479159a discloses a cavity medium displacement system and method suitable for submarine pipeline repair engineering, and relates to the field of marine equipment; the system comprises an air supply system, a valve panel, an equipment body and a water pumping system; the equipment body comprises a buoyancy chamber and a working chamber, and the air supply system is used for supplying compressed air to the working chamber and the buoyancy chamber to replace seawater in the chamber; the valve panel is used for controlling the on-off of each pipeline; the operation cabin of the equipment body is used for sealing and encircling the submarine pipeline to be repaired, and seawater in the operation cabin and the floating cabin can be replaced with air, so that a dry environment is provided for subsequent repair operation; the pumping system is used for discharging the seawater in the operation cabin and the floating cabin out of the cabin and is matched with the air supply system to finish the replacement of the seawater and the air; however, since the system involves a plurality of components such as an air supply system, a valve panel, an equipment body, a pumping system and the like, the structure is complex, operators need special training to be skillfully operated, the complexity of operation is increased, and the cost is high.
For example, "study on the supporting effect of hollow grouting anchor rod in weak surrounding rock tunnel" in period 01 of "electronic journal of filling, the invention aims at the problems that the anchoring force is insufficient, the surrounding rock deformation is not easy to control and the like in the weak surrounding rock tunnel, the common mortar anchor rod is replaced by the hollow grouting anchor rod, the problem of the insufficient anchoring force can be solved, the rod body also has the function of a grouting pipe, the supporting effect on the weak surrounding rock is promoted, the supporting characteristic of the hollow grouting anchor rod is studied, the supporting effect is simulated and analyzed by the limited differential software FLAC3D on the supporting effect of the supporting tunnel engineering, the influencing factors of the mechanical model of the hollow grouting anchor rod, the type of the hollow grouting anchor rod, the supporting mechanism of the hollow grouting anchor rod and the hollow grouting effect are analyzed, the common mortar anchor rod is replaced by the hollow grouting anchor rod, the problem of insufficient anchoring force can be solved, the theoretical analysis of the hollow grouting is only stopped, the problem of casting is lacking, and if the grouting liquid is not dispersed in underwater, the anchor rod is easy to pour in the underwater process, and the anchor rod is not easy to be flushed in the underwater.
Disclosure of Invention
The invention aims to solve the technical problems of insufficient anchoring force of an ordinary mortar anchor rod, poor dispersion resistance of underwater pouring of ordinary mortar and poor underwater pouring effect based on a method for repairing a marine cavity under a dynamic water condition.
In order to solve the technical problems, the technical scheme adopted by the invention is that the method for repairing the ocean cavity under the condition of moving water comprises the following steps:
Step1: preparing magnetic attractors such as permanent magnet blocks, recyclable magnetic hollow anchor rods and magnetic slurry;
step2: carrying out underwater survey, knowing the appearance of the cavity to be repaired by radar or ultrasonic scanning, and adopting different schemes aiming at cavities with different shapes;
Step3: aiming at different schemes, a magnetic attraction body is placed in the cavity, then magnetic slurry is injected, the slurry is magnetically adsorbed, and after the slurry is solidified, the repair is completed.
In the preferred scheme, the permanent magnet is prepared from neodymium iron boron magnetic powder and carrier base liquid according to the following steps of 1:3, preparing neodymium iron boron magnetic solution, pouring the solution into a self-made mould for casting, preparing specific shapes and sizes according to requirements, and magnetizing the test block which is finished by casting by using a magnetizing machine to enable the test block to have a magnetic field, so that magnetic slurry can be adsorbed.
In the preferred scheme, recoverable magnetism cavity stock contains the stock body that sets up in the outside, and the inside cartridge has the bar magnet of stock body, and stock body periphery is provided with a plurality of second permanent magnetism pieces or third permanent magnetism pieces, is provided with the screw thread on the second permanent magnetism piece, and the third permanent magnetism piece is strip permanent magnetism piece, and a plurality of strip permanent magnetism pieces attach on the expandable body.
In the preferred scheme, the inside of the anchor rod body is hollow, and a plurality of holes are formed in the outer wall of the anchor rod body.
In a preferred scheme, the magnetic slurry is prepared from oily epoxy resin, a curing agent, magnetic powder, fly ash, a reactive diluent and a coupling agent according to a mass ratio of 100:50: 80-100: 80-100: 9-12: 1.5, and curing under the environmental conditions of underwater, low temperature, high temperature, etc., and the shrinkage is less than 2%.
In the preferred scheme, in Step2, different schemes are adopted for cavities with different shapes, specifically, suitable schemes are selected according to factors such as depth and size of the cavity, sea wave impact size of the position of the cavity, requirement on strength after repair, budget cost and the like.
In a preferred scheme, in the first scheme of different schemes in Step3, when repairing the small cavity, the first permanent magnet is adopted for polishing and filling repair, and the specific steps are as follows:
Step3.1.1: fixing a first permanent magnet block in the deep part of the cavity;
Step3.1.2: the second first permanent magnet blocks are thrown into the hollow anchor rod, so that the first permanent magnet blocks can be guided and adsorbed to the appointed position, the first permanent magnet blocks are continuously thrown into the hollow anchor rod, the first permanent magnet blocks are mutually attracted to fill the hollow cavity, the hollow cavity is used for adsorbing magnetic slurry and simultaneously used for filling aggregate, when the hollow cavity is deep, the hollow anchor rod is inserted into the hollow anchor rod, and the hollow anchor rod is externally embedded with the second permanent magnet blocks and is used for adsorbing the magnetic slurry when the hollow cavity is inconvenient to throw into the first permanent magnet blocks;
Step3.1.3: grouting the prepared magnetic slurry from bottom to top through a high-pressure grouting machine, enabling the magnetic slurry to flow into the cavity along the grouting pipe, then rapidly and firmly adsorbing the magnetic slurry by the first permanent magnet, and ending the whole repairing process after the magnetic slurry is solidified after filling.
In a preferred embodiment, three specific methods for fixing the first permanent magnet block in the deep part of the cavity are provided in step3.1.1:
The first method is to rivet the magnetic rivet in the depth of the cavity, and then throw the first permanent magnet block into the cavity by using a mechanical arm;
the second method is that a plurality of small magnetic nails are scattered into the cavity, and the small magnetic nails are scattered around the inner wall of the cavity, so that the first permanent magnet can be adsorbed;
the third method is to use a large magnet to guide the first permanent magnet to the correct position by the magnetism of the large magnet.
In the preferred scheme, the second scheme of the different schemes in Step3, when repairing the large cavity with small sea wave and low budget cost, comprises the following specific steps:
step3.2.1: driving hollow anchor rods along the circumference of the cavity to form a ring shape, expanding an expandable body attached with a plurality of strip-shaped permanent magnet blocks, expanding the magnetic field range, controlling the spacing between the hollow anchor rods, and ensuring that each part of the spacing is covered by a magnetic field;
Step3.2.2: injecting magnetic slurry, injecting the magnetic slurry from a hollow part in the middle of the hollow anchor rod through a high-pressure grouting machine, allowing the magnetic slurry to flow down from holes around, adsorbing the magnetic slurry flowing out under the action of magnetic fields of the magnetic rod and the magnetic strip, gradually forming a wall, forming a waterproof magnetic film after the magnetic slurry is solidified, extracting the magnetic rod at the moment, and recycling;
step 3.2.3: pumping out the seawater in the cavity by using a water pump, so as to ensure that the cavity is in a working environment without seawater;
Step 3.2.4: and (3) injecting common repair mortar, injecting the prepared common repair mortar through a high-pressure grouting machine, slowly grouting the grouting pipe into the bottom of the cavity from bottom to top, and ending the whole repair process after solidification.
In the preferred scheme, in the third scheme of different schemes in Step3, when the repair strength requirement is high and the large cavity or pit with big environmental sea wave is located, the magnetic hollow anchor rod is driven into in an array mode for repair, and the method specifically comprises the following steps:
Step3.3.1: drilling holes and driving a plurality of hollow anchor rods externally embedded with second permanent magnets into the cavities or pits simultaneously by adopting an anchor rod drilling machine to form array arrangement;
Step3.3.2: injecting magnetic slurry, injecting the magnetic slurry from the hollow part in the middle of the hollow anchor rod through a high-pressure grouting machine, allowing the magnetic slurry to flow down along the hollow part, allowing the magnetic slurry to flow out from the holes around the hollow anchor rod, controlling the pressure of the high-pressure grouting machine to flow out from the holes just slowly, firmly adsorbing the magnetic slurry under the action of the magnetic field of the magnetic rod and the second permanent magnet, discharging the original seawater, and pulling out the magnetic rod after the magnetic slurry is solidified, and recycling the magnetic rod.
The ocean cavity repairing method based on the dynamic water condition has the following beneficial effects:
1. The permanent magnet blocks and the magnetic rods adopted by the invention are permanent magnet materials based on intermetallic compounds, and the neodymium iron boron has the advantages of extremely high magnetic energy and correction force and high energy density, so that the stability of magnetism is better;
2. The carrier base liquid used for preparing the magnet adopts the epoxy resin, and the epoxy resin is a common polymer material, has excellent physical property, excellent bonding property, good temperature resistance, good plasticity, safety and environmental protection, and further improves the repairing property and effect on the cavity;
3. According to the invention, the small cavity is repaired by adopting the permanent magnet throwing and filling, and the injected magnetic slurry can be firmly adsorbed after the large magnet is used for attraction or the magnetic nails are fixed, so that the construction efficiency is greatly improved, and the cavity is rapidly repaired;
4. The invention adopts the self-made mould to prepare the permanent magnet blocks, realizes the manufacture of the permanent magnet blocks with multiple sizes, specifications and shapes, is suitable for different scenes, facilitates the permanent magnet blocks to enter the cavity and be fixed, and is also beneficial to better combination of the permanent magnet blocks and magnetic slurry;
5. According to the invention, the magnetic anchor rods are driven into the periphery of the cavity, and the magnetic slurry is injected to form the waterproof magnetic film, so that the problem that a common template cannot be constructed outside the rugged cavity is solved, meanwhile, seawater is isolated, the corrosion of high sulfate to the coast is avoided, and in a region with larger sea waves, a plurality of layers of magnetic films can be formed by fixing a plurality of layers of magnetic anchor rods, so that the repairing effect and stability of the cavity are further improved;
6. The invention adopts the array type anchor rod to play the anchor rod, is firmer, can prevent bigger sea waves, is suitable for repairing large cavities or pits, can play a plurality of anchor rod drilling machines in batches, has high efficiency, is always the place most seriously washed by the sea waves in the place formed by the cavities in terms of natural law, is always the place where the next damage is always caused, has higher strength after the repair of the magnetic slurry injection than the original rock-soil layer, improves the repair effect, and reduces the frequency and degree of the next damage;
7. the magnetic anchor rod is designed according to the requirement, so that the complex condition of uneven surrounding of the hollow cavity and different depths can be effectively achieved, and the stability and reliability of the magnetic anchor rod are further improved;
8. the magnetic slurry has good chemical corrosion resistance, magnetic adsorptivity and fluidity and high mechanical strength, can be solidified under the environmental conditions of underwater, low temperature, high temperature and the like, has shrinkage less than 2%, can perfectly fill the fine gaps among the magnetic blocks without jolting after grouting repair, has good dispersion resistance, and effectively solves the problem of repairing the coastal cavity under the dynamic water condition and the high sulfate state of sea water;
9. The oily epoxy resin adopted by the preparation of the magnetic slurry has good corrosion resistance and compactness, has natural hydrophobicity, and has high adhesion due to inherent polar hydroxyl and ether bond in the epoxy resin molecular chain, so that the oily epoxy resin can form good adhesion package with underwater damaged structures, can isolate permanent magnets from contacting with external seawater and air, and enhances the corrosion resistance of the magnetic slurry;
10. The epoxy resin grouting material curing agent used for preparing the magnetic slurry has the advantages of high strength and binding force, good corrosion resistance and water resistance, convenient construction, suitability for reinforcing, strengthening, waterproofing, sealing, repairing and the like in the engineering field, and further improvement of the cavity repairing effect and efficiency by using the material;
11. the magnetic powder adopted by the magnetic slurry prepared by the invention has the advantages of low cost, better adsorption effect and stronger fluidity after being prepared with the oily epoxy resin, and the magnetic powder is used as the core of the magnetic slurry material, so that the underwater anti-scouring and guided flow performance is realized, and the cavity repairing effect is further improved;
12. The fly ash adopted by the magnetic slurry prepared by the invention has good mechanical property, corrosion resistance, fire resistance, heat resistance and wear resistance after being mixed and stirred with the epoxy resin, and meanwhile, the cost of the material is reduced, and the value of the scheme is improved;
13. The reactive diluent adopted by the preparation method of the magnetic slurry effectively reduces the viscosity of the epoxy resin, and increases the fluidity and permeability of the epoxy resin, so that the permeability of the magnetic slurry is improved, the binding force and chemical resistance between the coating and the substrate are enhanced, and the repairing effect of the cavity is further improved;
14. The invention has the advantages of short whole construction flow and high efficiency from the beginning to the end of construction, and can quickly finish the repair of the cavity, thereby reducing the influence of sea waves and sea water impact on the repair effect.
Drawings
The invention is further described below with reference to the accompanying drawings and examples of implementation:
FIG. 1 is a schematic view of a magnetic rivet according to embodiment 1 of the present invention for guiding and attracting a first permanent magnet;
FIG. 2is a schematic diagram of a large magnet guiding and adsorbing a first permanent magnet according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of a first permanent magnet for guiding and fixing a small scattering magnetic nail according to embodiment 1 of the present invention;
FIG. 4 is a schematic illustration of the magnetic slurry injection of example 1 of the present invention;
FIG. 5 is a schematic diagram illustrating the assembly of a second permanent magnet block and a hollow anchor according to embodiment 1 of the present invention;
FIG. 6 is an exploded view of a schematic view of a hollow bolt according to embodiment 1 of the present invention;
FIG. 7 is a schematic view of a single hollow bolt driven into a deep cavity according to embodiment 1 of the present invention;
FIG. 8 is a schematic diagram of the repair completion of embodiment 1 of the present invention;
FIG. 9 is a schematic view showing the assembly of an inflatable body and a hollow bolt according to embodiment 2 of the present invention;
FIG. 10 is an exploded view of a schematic diagram of a hollow anchor rod for constructing a magnetic film according to embodiment 2 of the present invention;
FIG. 11 is an expansion schematic of the expandable body of example 2 of the present invention;
FIG. 12 is a schematic illustration of an inflatable body of example 2 of the present invention driven into a hollow bolt and attached to a magnetic strip prior to inflation;
FIG. 13 is a schematic illustration of an expandable body with attached magnetic strips after inflation into a hollow bolt according to example 2 of the present invention;
FIG. 14 is a schematic diagram of the formation of a water-repellent magnetic film after grouting according to example 2 of the present invention;
FIG. 15 is a schematic diagram of the repair completion of embodiment 2 of the present invention;
FIG. 16 is a schematic diagram showing the process of repairing a cavity according to embodiment 3 of the present invention;
FIG. 17 is a schematic view showing the effect of repairing a cavity according to embodiment 3 of the present invention;
FIG. 18 is a top view of a repair hole of example 3 of the present invention after it has been driven into a magnetic bolt;
FIG. 19 is a schematic view showing the effect of repairing a pit according to embodiment 3 of the present invention;
In the figure: the grouting device comprises a first permanent magnet 1, a second permanent magnet 2, a third permanent magnet 3, a hollow anchor rod 4, an inflatable body 5, a large magnet 6, a small magnetic nail 7, a magnetic rivet 8 and a grouting pipe 9.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 1 to 8, the method for repairing the ocean cavity under the condition of moving water comprises the following steps:
Step1: preparing magnetic attractors such as permanent magnet blocks, recyclable magnetic hollow anchor rods 4 and the like, and magnetic slurry;
step2: carrying out underwater survey, knowing the appearance of the cavity to be repaired by radar or ultrasonic scanning, and adopting different schemes aiming at cavities with different shapes;
Step3: aiming at different schemes, a magnetic attraction body is placed in the cavity, then magnetic slurry is injected, the slurry is magnetically adsorbed, and after the slurry is solidified, the repair is completed.
The permanent magnet is prepared from neodymium iron boron magnetic powder and a carrier base liquid according to the following steps of 1:3, preparing neodymium iron boron magnetic solution, pouring the solution into a self-made mould for casting, preparing specific shapes and sizes according to requirements, and magnetizing the cast test block by using a magnetizing machine 6 to enable the test block to have a magnetic field, so that magnetic slurry can be adsorbed.
The recoverable magnetic hollow anchor rod 4 comprises an anchor rod body 41 arranged outside, a magnetic rod 42 is inserted into the anchor rod body 41, a plurality of second permanent magnet blocks 2 or third permanent magnet blocks 3 are arranged on the periphery of the anchor rod body 41, threads are arranged on the second permanent magnet blocks 2, the third permanent magnet blocks 3 are strip-shaped permanent magnet blocks, and a plurality of strip-shaped permanent magnet blocks are attached to the expandable body 5.
The anchor rod body 41 is hollow, and a plurality of holes are arranged on the outer wall of the anchor rod body.
The magnetic slurry is prepared from oily epoxy resin, a curing agent, magnetic powder, fly ash, a reactive diluent and a coupling agent according to the mass ratio of 100:50: 80-100: 80-100: 9-12: 1.5, and curing under the environmental conditions of underwater, low temperature, high temperature, etc., and the shrinkage is less than 2%.
In Step2, different schemes are adopted for cavities with different shapes, specifically, suitable schemes are selected according to the depth and the size of the cavity, the sea wave impact size of the position where the cavity is located, the requirement on strength after repair, the budget cost and other factors.
When repairing the small cavity, the first permanent magnet 1 is adopted for throwing and filling repair, and the specific steps of the first scheme of different schemes in Step3 are as follows:
Step3.1.1: fixing a first permanent magnet block 1 in the deep part of the cavity;
Step3.1.2: the second first permanent magnet blocks 1 are thrown into the hollow anchor rod, so that the first permanent magnet blocks 1 can be guided and adsorbed to the appointed position, the first permanent magnet blocks 1 are continuously thrown into the hollow anchor rod, the first permanent magnet blocks 1 are mutually attracted to fill the hollow cavity, the hollow cavity is used for adsorbing magnetic slurry, meanwhile, the hollow anchor rod is used for filling aggregate, when the hollow cavity is deep, the hollow anchor rod 4 externally embedded with the second permanent magnet blocks 2 is inserted into the hollow anchor rod for adsorbing the magnetic slurry when the first permanent magnet blocks 1 are inconvenient to throw into the hollow cavity;
Step3.1.3: grouting the prepared magnetic slurry from bottom to top through a high-pressure grouting machine, enabling the magnetic slurry to flow into the cavity along the grouting pipe 9, then rapidly and firmly adsorbing the magnetic slurry by the first permanent magnet block 1, and ending the whole repairing process after the magnetic slurry is solidified after filling.
The specific methods for fixing the first permanent magnet block 1 in the deep part of the cavity by using the step3.1.1 are three:
the first method is that a magnetic rivet 8 is nailed in the depth of a cavity, and then a mechanical arm is used for throwing in a first permanent magnet block 1;
the second method is that a plurality of small magnetic nails 7 are scattered into the cavity, and the small magnetic nails 7 are scattered around the inner wall of the cavity, so that the first permanent magnet 1 can be adsorbed;
The third method is to use a large magnet 6, and guide the first permanent magnet 1 to the correct position by the magnetism of the large magnet 6.
Example 2
In another preferred embodiment, referring to fig. 9 to 15 on the basis of the above embodiment 1, when repairing a large cavity with small sea wave and low budget cost, the specific steps of the second scheme of the different schemes in Step3 are as follows:
Step3.2.1: driving hollow anchor rods 4 along the circumference of the cavity to form a ring shape, expanding an expandable body 5 attached with a plurality of strip-shaped permanent magnet blocks, expanding the magnetic field range, controlling the spacing between the hollow anchor rods 4, and ensuring that each part of the spacing is covered by a magnetic field;
step3.2.2: injecting magnetic slurry, injecting the magnetic slurry from the hollow part in the middle of the hollow anchor rod 4 through a high-pressure grouting machine, allowing the magnetic slurry to flow down from the holes around, adsorbing the magnetic slurry flowing out under the action of the magnetic field of the magnetic rod 42 and the magnetic strip, gradually forming a wall, forming a waterproof magnetic film after the magnetic slurry is solidified, extracting the magnetic rod 42 at the moment, and recycling;
step 3.2.3: pumping out the seawater in the cavity by using a water pump, so as to ensure that the cavity is in a working environment without seawater;
Step 3.2.4: and (3) injecting common repair mortar, injecting the prepared common repair mortar through a high-pressure grouting machine, slowly grouting the grouting pipe into the bottom of the cavity from bottom to top, and ending the whole repair process after solidification.
Example 3
In another preferred embodiment, based on the above embodiment 1, referring to fig. 16 to 19, when the repair strength requirement is high and the large cavity or pit is in the large ocean wave, the magnetic hollow anchor rods 4 are driven in an array manner for repair, and the specific steps of the third scheme of the different schemes in Step3 are as follows:
Step3.3.1: simultaneously drilling holes and driving a plurality of hollow anchor rods 4 externally embedded with second permanent magnets 2 into the cavities or pits by adopting an anchor rod drilling machine to form array arrangement;
Step3.3.2: injecting magnetic slurry, injecting the magnetic slurry from the hollow part in the middle of the hollow anchor rod 4 through a high-pressure grouting machine, allowing the magnetic slurry to flow down from the holes around, controlling the pressure of the high-pressure grouting machine to flow out from the holes just slowly, firmly adsorbing the magnetic slurry under the action of the magnetic fields of the magnetic rod 42 and the second permanent magnet block 2, discharging the original seawater, and pulling out the magnetic rod 42 after the magnetic slurry is solidified, and recycling.
In the preferred scheme, the permanent magnet is prepared from neodymium iron boron magnetic powder and carrier base liquid according to the following steps of 1:3, preparing neodymium iron boron magnetic solution, pouring the solution into a self-made mold for casting, preparing the specific shape and size according to the requirement, and magnetizing the cast test block by using a magnetizing machine 6 to enable the test block to have a magnetic field so as to absorb magnetic slurry; the above arrangement, the rubidium-iron-boron manufacturing process is relatively simple, the production cost is low, the rubidium-iron-boron manufacturing process has a very high magnetic energy product, can provide very strong magnetic force, is not easy to be influenced by oxidization and corrosion, and improves the magnetic attraction of the permanent magnet, so that the repairing effect on the cavity is further improved.
In a preferred scheme, the recyclable magnetic hollow anchor rod 4 comprises an anchor rod body 41 arranged outside, a magnetic rod 42 is inserted into the anchor rod body 41, a plurality of second permanent magnetic blocks 2 or third permanent magnetic blocks 3 are arranged on the periphery of the anchor rod body 41, threads are arranged on the second permanent magnetic blocks 2, the third permanent magnetic blocks 3 are strip-shaped permanent magnetic blocks, and a plurality of strip-shaped permanent magnetic blocks are attached to the expandable body 5; above setting, through inlay the permanent magnetism piece at the outside cover of cavity stock 4, can enlarge the magnetic field scope of cavity stock 4 to enlarge the scope of adsorbing the magnetism thick liquid, let the interval between stock and the stock can suitably enlarge, reduce the stock quantity that needs to throw into, thereby practice thrift the cost, promote cavity prosthetic effect and efficiency.
In a preferred embodiment, the anchor rod body 41 is hollow, and a plurality of holes are formed on the outer wall of the anchor rod body; the above arrangement effectively avoids the limitation that the grouting pipe 9 can only be used for grouting slurry from one place, and the anchor rod body 41 with holes is used, so that the slurry flows out of the holes through controlling the pressure of the grouting machine, and multi-place multi-angle grouting is realized, so that the grouting efficiency and grouting uniformity are improved.
In a preferred scheme, the magnetic slurry is prepared from oily epoxy resin, a curing agent, magnetic powder, fly ash, a reactive diluent and a coupling agent according to a mass ratio of 100:50: 80-100: 80-100: 9-12: 1.5, curing under the environmental conditions of underwater, low temperature, high temperature and the like, wherein the shrinkage is less than 2%; the magnetic slurry prepared according to the raw materials fully utilizes the corrosion resistance and the water resistance of the oily epoxy resin and the curing agent, the heat resistance, the wear resistance and the corrosion resistance of the material are further improved by adding the fly ash and the epoxy resin for mixing, the viscosity of the epoxy resin can be effectively reduced by the reactive diluent, the fluidity and the permeability of the epoxy resin are increased, the permeability of the epoxy resin is further improved, the bonding force and the chemical resistance between the coating and a substrate are enhanced, the bonding strength and the affinity between the filler and the resin are improved by adding the coupling agent, and the stripping and the separation between the filler and the resin are prevented, so that the repairing capability and the repairing effect of the magnetic slurry are further improved.
In the preferred scheme, in Step2, different schemes are adopted for cavities with different shapes, specifically, suitable schemes are selected according to the depth and the size of the cavity, the sea wave impact size of the position where the cavity is located, the requirement on the strength after repair, the budget cost and other factors; above setting, in the face of different cavitys, can provide a plurality of schemes and select for repair procedure is nimble to be strained, and is not single, accords with the form complicacy and the odd pattern of cavity in the actual engineering more, thereby when further promoting repair effect and efficiency, reduce cost.
In summary, the method for repairing the ocean cavity under the moving water condition provided by the invention is based on the method for repairing the ocean cavity under the moving water condition, and several methods for repairing the ocean cavity under the moving water condition are provided, wherein for repairing the small cavity, the first permanent magnet blocks 1 are adopted for throwing and filling, and the mutual attraction between the first permanent magnet blocks 1 is utilized to serve as aggregate, and meanwhile, the injected magnetic slurry can be firmly adsorbed; when repairing a large cavity with small sea waves and low budget cost, an expandable device, such as an expandable body 5 with a magnetic strip, of which the recyclable magnetic hollow anchor rod 4 is attached with a strip-shaped magnetic block is repaired by building a waterproof magnetic film; aiming at the large cavity or pit with high restoration strength requirement and large sea wave in the environment, the array type magnetic hollow anchor rods 4 are adopted for restoration, a plurality of second permanent magnets 2 are sleeved on the hollow anchor rods 4, the injected magnetic slurry flows out along the hollow parts of the hollow anchor rods 4 and is adsorbed and fixed by the attached second permanent magnets 2 and the magnetic rods 42 in the hollow anchor rods, aiming at different cavity types, the three schemes generally utilize the excellent performance of the magnetic slurry, good fluidity and fine texture, fine gaps among the magnetic attractors can be perfectly filled without jolting during grouting restoration, and the three methods can be independently and flexibly used or can be mutually combined for use.
Claims (10)
1. A method based on sea cavity repair under hydrodynamic conditions, characterized in that it comprises the steps of:
Step1: preparing magnetic attractors such as permanent magnet blocks, recyclable magnetic hollow anchor rods (4) and magnetic slurry;
step2: carrying out underwater survey, knowing the appearance of the cavity to be repaired by radar or ultrasonic scanning, and adopting different schemes aiming at cavities with different shapes;
Step3: aiming at different schemes, a magnetic attraction body is placed in the cavity, then magnetic slurry is injected, the slurry is magnetically adsorbed, and after the slurry is solidified, the repair is completed.
2. The method for ocean cavity repair under hydrodynamic conditions of claim 1, wherein: the permanent magnet is prepared from neodymium iron boron magnetic powder and a carrier base liquid according to the following steps of 1:3, preparing neodymium iron boron magnetic solution, pouring the solution into a self-made mould for casting, preparing specific shapes and sizes according to requirements, and magnetizing the test block which is finished by casting by using a magnetizing machine to enable the test block to have a magnetic field, so that magnetic slurry can be adsorbed.
3. A method of ocean cavity repair based on hydrodynamic conditions according to claim 1, wherein: the recoverable magnetic hollow anchor rod (4) comprises an anchor rod body (41) arranged outside, a magnetic rod (42) is inserted into the anchor rod body (41), a plurality of second permanent magnet blocks (2) or third permanent magnet blocks (3) are arranged on the periphery of the anchor rod body (41), threads are arranged on the second permanent magnet blocks (2), the third permanent magnet blocks (3) are strip-shaped permanent magnet blocks, and a plurality of strip-shaped permanent magnet blocks are attached to the expandable body (5).
4. A method of ocean cavity repair based on hydrodynamic conditions according to claim 3, wherein: the inside of the anchor rod body (41) is hollow, and a plurality of holes are formed in the outer wall of the anchor rod body.
5. A method of ocean cavity repair based on hydrodynamic conditions according to claim 1, wherein: the magnetic slurry is prepared from oily epoxy resin, a curing agent, magnetic powder, fly ash, a reactive diluent and a coupling agent according to the mass ratio of 100:50: 80-100: 80-100: 9-12: 1.5, and curing under the environmental conditions of underwater, low temperature, high temperature, etc., and the shrinkage is less than 2%.
6. A method of ocean cavity repair based on hydrodynamic conditions according to claim 1, wherein: in Step2, different schemes are adopted for cavities with different shapes, specifically, suitable schemes are selected according to the depth and the size of the cavity, the sea wave impact size of the position where the cavity is located, the requirement on strength after repair, the budget cost and other factors.
7. The method for repairing the ocean cavity based on the dynamic water condition according to claim 1, wherein the first scheme of different schemes in Step3 is adopted to throw and fill the first permanent magnet block (1) for repairing the small cavity, and the specific steps are as follows:
Step3.1.1: fixing a first permanent magnet block (1) in the deep part of the cavity;
Step3.1.2: the second first permanent magnet blocks (1) are thrown into the hollow anchor rod, so that the first permanent magnet blocks (1) can be guided and adsorbed to the appointed position, the first permanent magnet blocks (1) are continuously thrown into the hollow anchor rod, the first permanent magnet blocks (1) are mutually attracted to fill the hollow cavity, the hollow cavity is used for adsorbing magnetic slurry, meanwhile, the hollow anchor rod is used for filling aggregate, when the depth of the hollow cavity is deep, the hollow anchor rod (4) with the second permanent magnet blocks (2) embedded outside is inserted into the hollow anchor rod, and the hollow anchor rod is used for adsorbing the magnetic slurry when the first permanent magnet blocks (1) are not convenient to throw into the hollow anchor rod;
Step3.1.3: grouting the prepared magnetic slurry from bottom to top through a high-pressure grouting machine, enabling the magnetic slurry to flow into the cavity along the grouting pipe (9), then rapidly and firmly adsorbing the magnetic slurry by the first permanent magnet block (1), and ending the whole repairing process after the magnetic slurry is solidified after filling.
8. The method for repairing the ocean cavity under the dynamic water condition according to claim 7, wherein three specific methods for fixing the first permanent magnet block (1) at the deep part of the cavity are provided by the step 3.1.1:
the first method is that a magnetic rivet (8) is nailed in the depth of a cavity, and then a mechanical arm is used for throwing in a first permanent magnet block (1);
The second method is that a plurality of small magnetic nails (7) are scattered into the cavity, and the small magnetic nails (7) are scattered around the inner wall of the cavity, so that the first permanent magnet (1) can be adsorbed;
The third method is to use a large magnet (6) to guide the first permanent magnet (1) to the correct position by the magnetism of the large magnet (6).
9. The method for repairing the ocean cavity based on the dynamic water condition according to claim 1, wherein the second scheme of the different schemes in Step3 comprises the following specific steps when repairing the large cavity with small sea wave and low budget cost:
step3.2.1: driving hollow anchor rods (4) along the circumference of the cavity to form a ring shape, expanding an expandable body (5) attached with a plurality of strip-shaped permanent magnet blocks, expanding the magnetic field range, controlling the spacing between the hollow anchor rods (4), and ensuring that each part of the spacing is covered by a magnetic field;
Step3.2.2: injecting magnetic slurry, injecting the magnetic slurry from a hollow part in the middle of the hollow anchor rod (4) through a high-pressure grouting machine, allowing the magnetic slurry to flow down from holes around, adsorbing the magnetic slurry under the action of the magnetic fields of the magnetic rod (42) and the magnetic strips, gradually forming a wall, forming a waterproof magnetic film after the magnetic slurry is solidified, extracting the magnetic rod (42), and recycling;
step 3.2.3: pumping out the seawater in the cavity by using a water pump, so as to ensure that the cavity is in a working environment without seawater;
Step 3.2.4: and (3) injecting common repair mortar, injecting the prepared common repair mortar through a high-pressure grouting machine, slowly grouting the grouting pipe into the bottom of the cavity from bottom to top, and ending the whole repair process after solidification.
10. The method for repairing the ocean cavity based on the hydrodynamic condition according to claim 1, wherein the third scheme of the different schemes in Step3 has high repairing strength requirement, and when the large cavity or pit with large ocean wave is in the environment, the method adopts an array type driving magnetic hollow anchor rod (4) for repairing, and comprises the following specific steps:
step3.3.1: simultaneously drilling holes and driving a plurality of hollow anchor rods (4) externally embedded with second permanent magnets (2) into the cavity or the pit by adopting an anchor rod drilling machine to form array arrangement;
Step3.3.2: injecting magnetic slurry, injecting the magnetic slurry from the hollow part in the middle of the hollow anchor rod (4) through a high-pressure grouting machine, allowing the magnetic slurry to flow down from the holes around, controlling the pressure of the high-pressure grouting machine to flow out of the holes just slowly, firmly adsorbing the magnetic slurry under the action of the magnetic fields of the magnetic rod (42) and the second permanent magnet (2), discharging the original seawater, and pulling out the magnetic rod (42) after the magnetic slurry is solidified, and recycling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410193811.1A CN117947735A (en) | 2024-02-21 | 2024-02-21 | Ocean cavity repairing method based on dynamic water condition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410193811.1A CN117947735A (en) | 2024-02-21 | 2024-02-21 | Ocean cavity repairing method based on dynamic water condition |
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