CN116180728A - Method for self-repairing pile foundation by using magnetic mixed mortar - Google Patents
Method for self-repairing pile foundation by using magnetic mixed mortar Download PDFInfo
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- CN116180728A CN116180728A CN202211566408.6A CN202211566408A CN116180728A CN 116180728 A CN116180728 A CN 116180728A CN 202211566408 A CN202211566408 A CN 202211566408A CN 116180728 A CN116180728 A CN 116180728A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000013535 sea water Substances 0.000 claims abstract description 20
- 230000009471 action Effects 0.000 claims abstract description 15
- 230000008439 repair process Effects 0.000 claims abstract description 14
- 230000006698 induction Effects 0.000 claims abstract description 10
- 230000005389 magnetism Effects 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 85
- 238000001125 extrusion Methods 0.000 claims description 56
- 239000004567 concrete Substances 0.000 claims description 47
- 239000012528 membrane Substances 0.000 claims description 18
- 238000005553 drilling Methods 0.000 claims description 14
- 238000007711 solidification Methods 0.000 claims description 14
- 230000008023 solidification Effects 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 230000005415 magnetization Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 4
- 239000006247 magnetic powder Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000011268 mixed slurry Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/64—Repairing piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
Abstract
The invention provides a method for self-repairing a pile foundation by utilizing magnetic mixed mortar, which invents a device capable of realizing a self-repairing concept by utilizing the magnetic mixed mortar to specially repair a pile foundation crack; the device greatly utilizes the related concepts of a regenerated magnetic field, magnetic conduction and the like, and a permanent magnet net is placed around the device to generate a magnetic field; and a direct current conduction type electromagnetic pump is arranged to enable the magnetic mixed mortar to flow into an induction area of the pile foundation, so that a closed magnetic field is formed. The magnetic mixed mortar has certain magnetism, and can automatically flow into cracks of the pile foundation due to corrosion of seawater for repair under the action of a strong magnetic field of the direct current conduction type electromagnetic pump. Therefore, the self-repairing of the pile foundation is truly achieved, and the engineering project construction with low cost and high efficiency is realized.
Description
Technical Field
The invention belongs to the technical field of pile foundation construction, and particularly relates to a method for self-repairing a pile foundation by using magnetic mixed mortar.
Background
With the rapid development of socioeconomic, the development of offshore wind power projects has entered a new stage, more and more projects such as the bridge of the Pinggu-Martensitic cross sea, and pile foundations are widely applied to engineering constructions of roads, ports, bridges and the like, in particular to offshore wind power projects. Seawater is accompanied with riprap, sha Bei and solidified soil mountains to scour and destroy a pile foundation, slurry on the surface of concrete flows out and is further solidified, and the surface of a film bag is cracked, so that the surface of the whole pile foundation is damaged, and the pile foundation needs to be protected by pouring paired film bag concrete; how to use a certain device to perform self-repairing on film bag concrete is one of the important subjects of long-term attention of researchers.
The most main reasons of the cracking are that the pile foundation is influenced by the construction process, a certain problem exists in a protection mode, the pile foundation is easy to damage, and the most influence on the pile foundation is sea water and rubble and Sha Bei attached to the sea water, so that how to prevent the pile foundation from being corroded by the sea water is one of the problems which are paid attention to by researchers for a long time at present. The invention fundamentally solves the problems of self-repairing, liquid backflow prevention and the like which cannot be solved by the traditional construction mode by installing the controllable spring device on the pile foundation.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for self-repairing a pile foundation by using magnetic mixed mortar, which can prevent the pile foundation from cracking to a great extent, isolate the corrosion of seawater scouring to the surface layer of the pile foundation, increase the tight combination of reinforcing steel bars and concrete, and greatly improve the self-repairing property and protection of the pile foundation, and has wide engineering practice significance and application prospect.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: a method for self-repairing a pile foundation by using magnetic mixed mortar comprises the following steps:
step1: drilling holes in rows on the pile foundation by using a drilling machine according to the design depth and the aperture requirement, so as to form pile holes; then, primarily leveling the bottom plane of the pile hole;
step2: embedding two pieces of long-distance film bag concrete at the position where the pile foundation is easy to crack, wherein the specific size of the film bag concrete is determined according to the pile hole;
step3: the special PVC sleeve is sleeved on the outer layer of the condensing pipe to form a combined sleeve, special repair liquid is injected in a crossing way, and then the combined sleeve is injected into a film bag concrete back pipeline in a parallel crossing way, so that the tightness is ensured to be good during pouring;
step4: then a knob switch is additionally arranged at a position, close to the bottom of the pile foundation, on one side of the concrete of the mould bag, and when manual grouting is needed, the switch is turned on; closing when not needed;
step5: the simple unidirectional extrusion device is manufactured by adding the air pump into the rubber ring, the sleeve, the partition plate and the spring; the magnetic mixed mortar is added into the unidirectional extrusion device in advance, and special repairing liquid is added into the two sides of the pipeline, so that sealing measures are also taken, the leakage can not occur in the unidirectional extrusion device, and the self-repairing of the pile foundation is further interrupted;
step6: the two sides of the unidirectional extrusion device are provided with a prestressing device, prestressing force is continuously applied to the unidirectional extrusion device through the prestressing device, a certain threshold value is reached, the spring is further deformed, and liquid in the unidirectional extrusion device flows due to extrusion of the spring, so that magnetic mixed mortar and special repairing liquid can flow outwards only in one direction, and the pipeline formed by the special PVC sleeve and the condenser pipe is guaranteed to support self-repairing for a long time, and the required effect is achieved;
step7: a pre-buried permanent magnet net is arranged around the unidirectional extrusion device, so that a magnetic field is generated by self-conduction of the unidirectional extrusion device, and a magnetization phenomenon is generated by the action of magnetic mixed mortar, so that a secondary magnetic field is derived around the unidirectional extrusion device, the influence range of magnetism is enlarged, and the surface of a pile foundation is magnetic;
step8: manually injecting magnetic mixed mortar along the drill hole by using the combined sleeve, and sucking and injecting the magnetic mixed mortar to the deep part of the crack under the magnetic attraction of the embedded permanent magnet net to fill the crack tightly, thereby improving the crack repairing filling rate;
step9: the magnetic mixed mortar flows into the induction area of the pile foundation through the direct current conduction type electromagnetic pump to form a closed magnetic field, the magnetic mixed mortar automatically flows into the pile foundation to repair the crack eroded by seawater under the action of the strong magnetic field of the direct current conduction type electromagnetic pump, and the magnetic field and the current in the magnetic mixed mortar interact to generate a pressure gradient to interact with the movable pump body, so that the self-repairing of the pile foundation is achieved.
The drilling machine is used for drilling holes uniformly in the membrane bag concrete in rows, so that seawater can flow uniformly, and the seawater cannot be accumulated on a single concrete block.
Firstly, arranging a circle of special PVC sleeve on the surface of a drilled hole, and then sleeving a layer of condensing pipe in the special PVC sleeve to prevent internal liquid from being solidified due to overlarge external pressure during manual grouting;
and placing the special PVC sleeve doped with the magnetic mixed mortar into the film bag concrete, wherein the materials are all flowing liquid, so that the liquid in the pipeline is prevented from flowing back and solidifying.
A knob switch is arranged on a special PVC sleeve in the membrane bag concrete, so that the flow and the pressure of the magnetic mixed mortar are regulated, the magnetic mixed mortar can only flow outwards in one direction, and cannot flow into a pipeline, the phenomenon of liquid solidification and the like is avoided, and the self-repairing of a pile foundation is affected.
The back of the long-distance film bag concrete is provided with a pipeline, the pipeline is internally provided with liquid special repairing liquid, the special repairing liquid is divided into liquid A and liquid B, and solidification can occur when the liquid A and the liquid B touch together.
When a certain part of the membrane bag concrete cracks, one part of the unidirectional extrusion device can be opened, liquid in the unidirectional extrusion device can only flow outwards in one direction, the unidirectional extrusion device can only open outwards, liquid backflow is prevented, and the pipeline is guaranteed to support self-repairing of a pile foundation for a long time.
The prestress is continuously applied to the surface of the spring of the unidirectional extrusion device through the prestress device, so that the spring is pressed to push the unidirectional extrusion device, the magnetic mixed mortar is adjusted to flow inside the unidirectional extrusion device, and under the action of the special repairing liquid, the liquid in the unidirectional extrusion device flows only from one direction, and the flowing state is kept, so that the condition of solidification of the liquid is avoided.
And (3) placing a plurality of elliptic iron sand with large grain diameter at the tail end of the unidirectional extrusion device as a supplement to the magnetic mixed mortar, and performing rust-proof treatment on the pile foundation.
The direct current conduction type electromagnetic pump consists of magnetic poles, electrodes and a pumping ditch, direct current is introduced into the magnetic mixed mortar through the electrodes at two sides of the pumping ditch between the N-S poles of the directional constant magnetic field, the direct current direction is perpendicular to the magnetic field direction, electromagnetic force is generated to drive the magnetic mixed mortar according to the left hand rule, the flowing direction can be changed by changing the polarity of the magnetic poles or the electrodes, the driving strength can be changed by adjusting the magnetic field strength or the direct current, and then the magnetic mixed mortar is enabled to flow into an induction area of a pile foundation to form a closed magnetic field.
The embedded permanent magnet net is a net-shaped structure body formed by staggered permanent magnets buried in the drilled holes according to the size of the membrane bag concrete, and the structure is loose in the middle and dense in corners.
The invention has the following beneficial effects:
1. compared with the traditional grouting method which relies on self gravity pouring of concrete mortar and consumes labor, the method has great progress, the innovative magnetic mixed mortar which uses nano magnetic powder and superfine cement is put into the position of the pile foundation which is easy to crack, and two long-distance membrane bag concrete are embedded, so that the pile foundation can be well prevented from being eroded by seawater.
2. The invention aims at repairing and improving the easily cracked part of the pile foundation, and the research results in the lack of self-protection. The reason for the lack of self-protection is that a layer of film belt concrete is lack for protection, when seawater is used for flushing a pile foundation along with a large amount of polished stones, sha Bei and solidified soil mountains, a plurality of cracks can appear on the surface of the pile foundation for a long time, and the pile foundation is cracked due to an unrecoverable mechanism, so that the normal work of the pile foundation and even the whole project is affected. The advantage of the invention is that a self-circulating liquid return system can be formed inside the pile foundation.
3. The special repairing liquid used in the invention is divided into the liquid A and the liquid B, and the two repairing liquids can generate unidirectional circulation when touching together and can not solidify; thereby forming a self-circulating liquid return system.
4. The two-layer special PVC sleeve used in the invention can greatly reduce the demand of magnetic mortar in pouring, save cost and reduce construction time.
5. The condensing tube used in the invention can prevent the internal liquid from solidifying due to overlarge external pressure during manual grouting.
6. The unidirectional extrusion device used in the invention has the advantages that a simple device is manufactured by utilizing a rubber ring, a sleeve, a partition plate and a spring and adding an air pump, namely, one extrusion device is arranged at one side of a combined sleeve in the membrane bag concrete, a certain amount of magnetic mixed mortar is reserved before the extrusion device is arranged, and special repair liquid is respectively injected into two sides of a pipeline: the liquid is divided into liquid A and liquid B, so that the liquid in the device can only flow to different sides without solidification.
7. The embedded permanent magnet net used in the invention has the characteristics of large magnetic attraction area of the permanent magnets which are staggered to form a net structure, loose middle and dense corners, less consumed materials, strong adaptability and low cost. A closed magnetic field is formed, and the magnetic mixed mortar acts to generate magnetization, so that a secondary magnetic field is derived from the periphery, the influence range of magnetism is enlarged, and the surface of the pile foundation is magnetic.
8. The direct current conduction type electromagnetic pump used in the invention forms a closed magnetic field by enabling the magnetic mixed mortar to flow into the induction area of the pile foundation. The magnetic mixed mortar has certain magnetism, and under the action of the strong magnetic field of the direct current conduction type electromagnetic pump, the magnetic mixed mortar automatically flows into a pile foundation to repair a crack corroded by seawater, and the magnetic field and current in the conductive fluid interact with each other, so that the fluid is subjected to electromagnetic action to generate pressure gradient, and the pressure gradient interacts with a movable pump body to drive the pump body to vibrate. Thereby achieving the self-repairing of the pile foundation.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic illustration of a composite casing grouting of the present invention.
FIG. 2 is a schematic view of the concrete of the membrane bag of the present invention.
FIG. 3 is a schematic view of a one-way extrusion apparatus of the present invention.
FIG. 4 is a schematic diagram of a prestressing device according to the present invention.
Fig. 5 is a pre-buried permanent magnet net of the present invention.
In the figure: the magnetic mixed mortar 1, the membrane bag concrete 2, the drilling machine, the special repair liquid 4, the special PVC sleeve 5, the condenser tube 6, the knob switch 7, the rubber ring 8, the sleeve 9, the baffle 10, the spring 11, the air pump 12, the one-way extrusion device 13, the prestress device 14 and the embedded permanent magnet net 17.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-5, a method for self-repairing a pile foundation using magnetic mixed mortar comprises the following steps:
step1: drilling holes in rows on the pile foundation by using a drilling machine according to the design depth and the aperture requirement, so as to form pile holes; then, primarily leveling the bottom plane of the pile hole;
step2: embedding two pieces of film bag concrete 2 in a lower long distance at a position where a pile foundation is easy to crack, wherein the specific size of the film bag concrete 2 is determined according to pile holes;
step3: the special PVC sleeve 5 is sleeved on the outer layer of the condenser pipe 6 to form a combined sleeve, the special repair liquid 4 is injected in a crossing way, and then the combined sleeve is injected into the back pipeline of the membrane bag concrete 2 in a parallel crossing way, and the tightness is ensured to be perfect during pouring;
step4: then a knob switch 7 is additionally arranged at a position, close to the bottom of the pile foundation, of one side of the mould bag concrete 2, and when manual grouting is needed, the switch is turned on; closing when not needed;
step5: the simple one-way extrusion device 13 is manufactured by adding the air pump 12 into the rubber ring 8, the sleeve 9, the partition plate 10 and the spring 11; the magnetic mixed mortar 1 is added into the unidirectional extrusion device 13 in advance, and the special repairing liquid 4 is added into the two sides of the pipeline, so that sealing measures are also taken, the situation that leakage cannot occur in the unidirectional extrusion device 13 is ensured, and the self-repairing of the pile foundation is interrupted;
step6: the two sides of the unidirectional extrusion device 13 are provided with a prestressing device 14, prestressing force is continuously applied to the unidirectional extrusion device 13 through the prestressing device 14 to reach a certain threshold value, so that the spring 11 is deformed, and liquid in the unidirectional extrusion device 13 flows due to extrusion of the spring 11, so that the magnetic mixed mortar 1 and the special repairing liquid 4 can flow outwards only in one direction, and the pipeline formed by the special PVC sleeve 5 and the condenser pipe 6 is ensured to support self-repairing for a long time, and the required effect is achieved;
step7: a pre-buried permanent magnet net 17 is arranged around the unidirectional extrusion device 13, so that a self-guiding magnetic field is generated, and a magnetization phenomenon is generated under the action of the magnetic mixed mortar 1, so that a secondary magnetic field is derived around, the influence range of magnetism is enlarged, and the surface of a pile foundation is magnetic;
step8: manually injecting magnetic mixed mortar 1 along the drill hole by using a combined sleeve, and sucking and injecting the magnetic mixed mortar 1 to the deep part of the crack under the magnetic attraction of the embedded permanent magnet net 17 to fill the crack tightly, thereby improving the crack repairing filling rate;
step9: the magnetic mixed mortar 1 is circulated into the induction area of the pile foundation through the direct current conduction type electromagnetic pump to form a closed magnetic field, the magnetic mixed mortar can automatically flow into the pile foundation to repair the crack eroded by seawater under the action of the strong magnetic field of the direct current conduction type electromagnetic pump, and the magnetic field and the current in the magnetic mixed mortar 1 interact to generate a pressure gradient to interact with the movable pump body, so that the self-repairing of the pile foundation is achieved.
Furthermore, the permanent magnet magnetic nails are tightly combined with the mixed slurry of the superfine cement and the nanometer magnetic powder, and the pre-buried membrane bag concrete is injected to self-repair the pile foundation.
Furthermore, the mixed slurry of the superfine cement and the nanometer magnetic powder can be proportioned according to different conditions such as regions, working conditions and the like.
Further, the film bag concrete 2 is formed by adding magnetic mixed mortar to prevent the liquid in the film bag concrete from flowing out due to the tearing of the film belt, so as to form a solidified body.
Furthermore, the self-repairing of the pile foundation is to add special repairing liquid into the pre-buried film bag concrete, and the two repairing liquids can generate unidirectional circulation together without solidification; meanwhile, the magnetic mixed mortar is used as main liquid, and the special magnetism thereof is used for traction, so that the liquid in the pipeline is guided to flow outwards in one direction.
Furthermore, the drilling machine is used for drilling holes uniformly in the membrane bag concrete in rows, so that seawater can flow uniformly, and the seawater cannot be accumulated on a single concrete block.
Further, the method comprises the step of self-repairing the easily cracked part of the pile foundation by using a magnetic mixed slurry formed by fusing superfine cement and nanometer magnetic powder, and simultaneously forming a self-circulating liquid reflux system.
Furthermore, a circle of special PVC sleeve 5 is arranged on the surface of the drilled hole, and a layer of condensing tube 6 is sleeved in the special PVC sleeve 5, so that the internal liquid is prevented from being solidified due to overlarge external pressure during manual grouting.
Furthermore, the special PVC sleeve 5 doped with the magnetic mixed mortar 1 is placed into the membrane bag concrete 2, and flowing liquid is filled in the material, so that the liquid in the pipeline is ensured not to flow back and solidify.
Furthermore, a knob switch 7 is arranged on the special PVC sleeve 5 in the film bag concrete 2, so that the flow and the pressure of the magnetic mixed mortar 1 are regulated, the magnetic mixed mortar can only flow outwards in one direction, and cannot flow into a pipeline, the phenomena of liquid solidification and the like are avoided, and the self-repairing of a pile foundation is further influenced.
Furthermore, the combined sleeve grouting of the pile foundation is characterized in that a circle of special PVC sleeve is arranged on the surface of a drilled hole, and a layer of condensing pipe is sleeved in the special PVC sleeve to form a new sleeve combination, so that the grouting is performed manually, and meanwhile, the solidification of slurry caused by temperature and other reasons is avoided, and the injection of the whole slurry and the subsequent self-repairing of the pile foundation are affected.
Further, the back of the long-distance film bag concrete 2 is provided with a pipeline, the pipeline is internally provided with a liquid special repairing liquid 4, the special repairing liquid 4 is divided into a liquid A401 and a liquid B402, and solidification occurs when the liquid A401 and the liquid B402 come together. Liquid a 401 and liquid B402; the pile foundation repairing method is formed by mixing and stirring certain special materials according to a certain proportion, and mainly plays a role in repairing slurry on the inner wall of a pipeline in real time so as to avoid solidification phenomenon and further realize self-repairing of the pile foundation.
Further, when a certain part of the membrane bag concrete 2 is cracked, one part of the unidirectional extrusion device 13 can be opened, the liquid in the unidirectional extrusion device can only flow outwards in one direction, the unidirectional extrusion device 13 can only open outwards, liquid backflow is prevented, and the pipeline is ensured to support the self-repairing of the pile foundation for a long time.
Further, the surface of the spring 11 of the unidirectional extrusion device 13 is continuously prestressed through the prestressing device 14, so that the spring 11 is pressed to push the unidirectional extrusion device 13, the inside adjusting magnetic mixed mortar 1 flows, and under the action of the special repairing liquid 4, the liquid in the unidirectional extrusion device 13 flows from one direction only, and the flowing state is kept, so that the situation of solidification of the liquid is avoided. The liquid in the liquid storage tank is converged from two directions, and the flowing state is kept, so that the situation of solidification of the liquid is avoided.
Further, at the end of the unidirectional extrusion device 13, elliptical iron sand with large particle size is placed to supplement the magnetic mixed mortar 1, and rust prevention treatment is carried out on the pile foundation.
Further, the direct current conduction type electromagnetic pump consists of magnetic poles, electrodes and a pumping ditch, direct current is introduced into the magnetic mixed mortar 1 through the electrodes at two sides of the pumping ditch between the N-S poles of the directional constant magnetic field, the direction of the direct current is perpendicular to the direction of the magnetic field, electromagnetic force is generated to drive the magnetic mixed mortar 1 according to the left hand rule, the flowing direction can be changed by changing the polarity of the magnetic poles or the electrodes, the driving strength can be changed by adjusting the strength of the magnetic field or the direct current, and then the magnetic mixed mortar 1 is enabled to flow into an induction area of a pile foundation, so that a closed magnetic field is formed. The direct current conduction type electromagnetic pump forms a closed magnetic field by enabling the magnetic mixed mortar to flow into an induction zone of the pile foundation. The magnetic mixed mortar has certain magnetism, and can automatically flow into cracks of the pile foundation due to corrosion of seawater for repair under the action of a strong magnetic field of the direct current conduction type electromagnetic pump. And the interaction of the magnetic field and the current in the magnetic mixed mortar causes the magnetic mixed mortar to generate pressure gradient under the action of electromagnetic force, and the pressure gradient and the movable pump body form interaction to drive the pump body to vibrate. Thereby achieving the self-repairing of the pile foundation.
Further, the embedded permanent magnet net 17 is a net structure body formed by staggered permanent magnets buried in the drilled holes according to the size of the membrane bag concrete 2, and the structure is loose in the middle and dense in corners. The embedded permanent magnet net 17 is a columnar structure body which has large magnetic attraction area of permanent magnets staggered to form a net structure, loose middle part and dense corners, and can consume less materials, and has strong adaptability and low cost. A closed magnetic field is formed, and the magnetic mixed mortar acts to generate magnetization, so that a secondary magnetic field is derived from the periphery, the influence range of magnetism is enlarged, and the surface of the pile foundation is magnetic.
The action mechanism of the invention is as follows:
a device and a method for self-repairing a pile foundation by using magnetic mixed mortar are disclosed, which are characterized in that a device capable of realizing a self-repairing concept is invented by utilizing the special repairing of cracks of the pile foundation by the magnetic mixed mortar; the device greatly utilizes the related concepts of a regenerated magnetic field, magnetic conduction and the like, and a permanent magnet net is placed around the device to generate a magnetic field; and a direct current conduction type electromagnetic pump is arranged to enable the magnetic mixed mortar to flow into an induction area of the pile foundation, so that a closed magnetic field is formed. The magnetic mixed mortar has certain magnetism, and can automatically flow into cracks of the pile foundation due to corrosion of seawater for repair under the action of a strong magnetic field of the direct current conduction type electromagnetic pump. Therefore, the self-repairing of the pile foundation is truly achieved, and the engineering project construction with low cost and high efficiency is realized.
Claims (10)
1. The method for self-repairing the pile foundation by using the magnetic mixed mortar is characterized by comprising the following steps of:
step1: drilling holes in rows on the pile foundation by using a drilling machine according to the design depth and the aperture requirement, so as to form pile holes; then, primarily leveling the bottom plane of the pile hole;
step2: embedding two pieces of film bag concrete (2) in a lower long distance at a position where a pile foundation is easy to crack, wherein the specific size of the film bag concrete (2) is determined according to pile holes;
step3: the special PVC sleeve (5) is sleeved on the outer layer of the condenser pipe (6) to form a combined sleeve, special repair liquid (4) is injected in a crossing manner, and then the combined sleeve is injected into a back pipeline of the film bag concrete (2) in a parallel crossing manner, and the tightness is ensured to be perfect during pouring;
step4: then a knob switch (7) is additionally arranged at a position, close to the bottom of the pile foundation, of one side of the mould bag concrete (2), and when manual grouting is needed, the switch is turned on; closing when not needed;
step5: the simple unidirectional extrusion device (13) is manufactured by adding the air pump (12) into the rubber ring (8), the sleeve (9), the baffle plate (10) and the spring (11); the magnetic mixed mortar (1) is added into the unidirectional extrusion device (13) in advance, and the special repairing liquid (4) is added into the two sides of the pipeline, so that sealing measures are also taken, the leakage can not occur in the unidirectional extrusion device (13), and the self-repairing of the pile foundation is further interrupted;
step6: the two sides of the unidirectional extrusion device (13) are provided with a prestressing device (14), the unidirectional extrusion device (13) is continuously prestressed through the prestressing device (14) to reach a certain threshold value, and then the spring (11) is deformed, so that liquid in the unidirectional extrusion device (13) flows due to extrusion of the spring (11), the magnetic mixed mortar (1) and the special repair liquid (4) can only flow outwards in one direction, and the pipeline formed by the special PVC sleeve (5) and the condenser tube (6) can be ensured to support self-repair for a long time, and the required effect is achieved;
step7: a pre-buried permanent magnet net (17) is arranged around the unidirectional extrusion device (13) to lead the unidirectional extrusion device to generate a magnetic field, and the unidirectional extrusion device also has the effect of magnetic mixed mortar (1) to generate a magnetization phenomenon, so as to lead the unidirectional extrusion device to generate a secondary magnetic field around and increase the influence range of magnetism, thereby leading the surface of the pile foundation to be magnetic;
step8: manually injecting magnetic mixed mortar (1) along a drilling hole by using a combined sleeve, and sucking and injecting the magnetic mixed mortar (1) to the deep part of a crack under the magnetic attraction of a pre-buried permanent magnet net (17), so that the crack is filled compactly, and the crack repairing filling rate is improved;
step9: the magnetic mixed mortar (1) flows into the induction area of the pile foundation through the direct current conduction type electromagnetic pump to form a closed magnetic field, the magnetic mixed mortar automatically flows into the pile foundation to repair the crack eroded by seawater under the action of the strong magnetic field of the direct current conduction type electromagnetic pump, and the magnetic field and the current in the magnetic mixed mortar (1) interact to generate a pressure gradient to interact with the movable pump body, so that the self-repairing of the pile foundation is achieved.
2. The method for self-repairing pile foundation by using magnetic mixed mortar according to claim 1, wherein the method comprises the following steps: the drilling machine is used for drilling holes uniformly in the membrane bag concrete in rows, so that seawater can flow uniformly, and the seawater cannot be accumulated on a single concrete block.
3. The method for self-repairing pile foundation by using magnetic mixed mortar according to claim 1, wherein the method comprises the following steps: firstly, arranging a circle of special PVC sleeve (5) on the surface of a drilled hole, and then sleeving a layer of condensing pipe (6) inside the special PVC sleeve (5) to prevent internal liquid from being solidified due to overlarge external pressure during manual grouting;
the special PVC sleeve (5) doped with the magnetic mixed mortar (1) is placed into the membrane bag concrete (2), and flowing liquid is filled in the material, so that the liquid in the pipeline is ensured not to flow back and solidify.
4. The method for self-repairing pile foundation by using magnetic mixed mortar according to claim 1, wherein the method comprises the following steps: a knob switch (7) is arranged on a special PVC sleeve (5) in the film bag concrete (2), so that the flow and the pressure of the magnetic mixed mortar (1) are regulated, the magnetic mixed mortar can only flow outwards in one direction, and cannot flow into a pipeline, the phenomenon of liquid solidification and the like is avoided, and the self-repairing of a pile foundation is further affected.
5. The method for self-repairing pile foundation by using magnetic mixed mortar according to claim 1, wherein the method comprises the following steps: the back of the long-distance film bag concrete (2) is provided with a pipeline, the pipeline is internally provided with a liquid special repairing liquid (4), the special repairing liquid (4) is divided into a liquid A (401) and a liquid B (402), and solidification can occur when the liquid A (401) and the liquid B (402) are contacted together.
6. The method for self-repairing pile foundation by using magnetic mixed mortar according to claim 1, wherein the method comprises the following steps: when a certain part of the membrane bag concrete (2) is cracked, one part of the unidirectional extrusion device (13) can be opened, liquid in the unidirectional extrusion device can only flow outwards in one direction, the unidirectional extrusion device (13) can only open outwards, liquid backflow is prevented, and the pipeline is ensured to support self-repairing of a pile foundation for a long time.
7. The method for self-repairing pile foundation by using magnetic mixed mortar according to claim 1, wherein the method comprises the following steps: the prestress is continuously applied to the surface of the spring (11) of the unidirectional extrusion device (13) through the prestress device (14), so that the spring (11) is pressed to push the unidirectional extrusion device (13), the inside adjusting magnetic mixed mortar (1) flows, and under the action of the special repairing liquid (4), the liquid in the unidirectional extrusion device (13) flows only from one direction, and the flowing state is kept, so that the condition of solidification of the liquid is avoided.
8. The method for self-repairing pile foundation by using magnetic mixed mortar according to claim 1, wherein the method comprises the following steps: and (3) placing a plurality of elliptic iron sand with large grain diameter at the tail end of the unidirectional extrusion device (13) as a supplement to the magnetic mixed mortar (1) to perform rust-proof treatment on the pile foundation.
9. The method for self-repairing pile foundation by using magnetic mixed mortar according to claim 1, wherein the method comprises the following steps: the direct current conduction type electromagnetic pump consists of magnetic poles, electrodes and a pumping ditch, direct current is introduced into the magnetic mixed mortar (1) through the electrodes at two sides of the pumping ditch between the N-S poles of the directional constant magnetic field, the direct current direction is perpendicular to the magnetic field direction, electromagnetic force is generated to drive the magnetic mixed mortar (1) according to the left hand rule, the flowing direction can be changed by changing the polarity of the magnetic poles or the electrodes, the driving strength can be changed by adjusting the magnetic field strength or the direct current, and then the magnetic mixed mortar (1) is enabled to flow into an induction area of a pile foundation, so that a closed magnetic field is formed.
10. The method for self-repairing pile foundation by using magnetic mixed mortar according to claim 1, wherein the method comprises the following steps: the embedded permanent magnet net (17) is a net-shaped structure body formed by staggered permanent magnets buried in the drilled holes according to the size of the membrane bag concrete (2), and the structure is loose in the middle and dense in corners.
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