CN114460281B - Experimental device and method for repairing concrete cracks of membrane bags by adopting vacuum grouting - Google Patents
Experimental device and method for repairing concrete cracks of membrane bags by adopting vacuum grouting Download PDFInfo
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- CN114460281B CN114460281B CN202210018783.0A CN202210018783A CN114460281B CN 114460281 B CN114460281 B CN 114460281B CN 202210018783 A CN202210018783 A CN 202210018783A CN 114460281 B CN114460281 B CN 114460281B
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- 239000012528 membrane Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000000741 silica gel Substances 0.000 claims abstract description 74
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004570 mortar (masonry) Substances 0.000 claims description 31
- 239000011347 resin Substances 0.000 claims description 27
- 229920005989 resin Polymers 0.000 claims description 27
- 238000002474 experimental method Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 239000002390 adhesive tape Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 5
- 230000035515 penetration Effects 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 6
- 230000001788 irregular Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002308 calcification Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
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Abstract
The invention provides an experimental device and a method for repairing a concrete crack of a membrane bag by adopting vacuum grouting, comprising a main body bearing frame, wherein a sample fixing frame is arranged on the top support of the main body bearing frame, and a membrane bag concrete sample, a silica gel cushion layer and a vacuum cover are arranged on the sample fixing frame through a counter-force frame; the vacuum cover is provided with a grouting hole, a suction hole and a measuring hole; the grouting hole is connected with grouting equipment, and the suction hole is connected with vacuum suction equipment; and a vacuum pressure gauge is arranged on the measuring hole. The problems that slurry cannot enter the cracks due to insufficient removal of water vapor in the cracks and the micro cracks cannot be filled in the cracks in the membrane bag concrete crack repairing project are solved, so that the project is damaged and the durability of the project is affected; the device and the technology provided by the invention are simple and convenient to operate, and have wide engineering practice significance and application prospect.
Description
Technical Field
The invention belongs to the technical field of membrane bag concrete crack repairing experiments, and particularly relates to an experimental device and method for repairing a membrane bag concrete crack by vacuum grouting.
Background
In recent years, along with the development of basic engineering in China, the water conservancy projects at ports and docks and coasts are increased; the membrane bag concrete has the advantages of convenient and quick construction, strong integrity, good stability and the like, and is widely applied to engineering construction, especially in the protection engineering of dam protection, bank protection, deep water bank protection, bottom protection engineering and the like, the integral quality of construction is greatly improved, and the membrane bag concrete plays a role in protecting engineering. However, due to the problems of irregular construction, neglect of later concrete curing work and the like, irregular cracks are generated in the mould bag concrete, and further expansion of the cracks and calcification reflection of the internal concrete can be caused under the scouring of seawater, so that the durability and the safety of engineering are affected.
By grouting to fill the cracks, not only can the engineering damage be effectively prevented, but also the integrity and durability of the engineering can be improved; the water vapor existing in the cracks plays a decisive role in repairing the cracks, and is particularly important for micro cracks; the conventional grouting technology cannot achieve the expected effect due to the fact that water vapor exists in cracks, so that the cracks cannot be fully penetrated into the cracks, and even the micro cracks are not filled with the slurry, so that the integrity of the engineering is affected.
Disclosure of Invention
In order to solve the technical problems, the invention provides an experimental device and a method for repairing a diaphragm bag concrete crack by adopting vacuum grouting, which solve the problems that slurry cannot enter the inside of the crack and tiny cracks cannot be filled to cause engineering damage and influence the durability of the engineering due to insufficient removal of water vapor in the crack in the diaphragm bag concrete crack repairing engineering; the device and the technology provided by the invention are simple and convenient to operate, and have 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: an experimental device for repairing a diaphragm bag concrete crack by adopting vacuum grouting comprises a main body bearing frame, wherein a sample fixing frame is arranged on the top support of the main body bearing frame, and a diaphragm bag concrete sample, a silica gel cushion layer and a vacuum cover are arranged on the sample fixing frame through a counter-force frame; the vacuum cover is provided with a grouting hole, a suction hole and a measuring hole; the grouting hole is connected with grouting equipment, and the suction hole is connected with vacuum suction equipment; and a vacuum pressure gauge is arranged on the measuring hole.
The main body bearing frame is formed by splicing and welding stainless steel materials and comprises a telescopic rod arranged at the top of the main body bearing frame, the top of the telescopic rod is hinged to support the sample fixing frame, and the inclination angle of the sample fixing frame is changed by adjusting the telescopic rod.
The vacuum cover is made of acrylic plate materials through cementing, and the size of the vacuum cover is the same as that of the film bag concrete sample.
The silica gel cushion layer is prepared by pouring silica gel added with a hardening agent into a mold with the surface of a film bag concrete sample with cracks as the bottom, and taking out the mold after the silica gel is hardened; and a strip magnet is arranged on the contact surface between the middle of the silica gel cushion layer and the film bag concrete sample.
Mortar is arranged in the grouting equipment and is used for injecting the mortar into the cracks of the film bag concrete sample through the grouting holes, and the diffusion filling condition of the mortar in the cracks under the action of different grouting pressures is observed.
The vacuum suction device is used for sucking air in the cracks of the vacuum cover and the film bag concrete sample, and determining the vacuum degree in the cracks through the indication number of the vacuum pressure gauge.
In the preparation process of the film bag concrete sample, concrete is poured into a film bag concrete sample mold, and the mold is removed after the concrete is fully solidified to obtain the film bag concrete sample; in the concrete pouring process, a film bag is placed in a film bag concrete sample mold, so that a film bag concrete sample is divided into two completely matched samples A and B, factors for manually acquiring a crack surface are reduced, and the influence on an experimental rule is weakened; the concrete is prepared by mixing cement, sand and water according to a certain water-cement ratio.
Pouring the silica gel into a mold with the sample A or the sample B as a bottom, and taking out the mold after the silica gel is hardened; then taking the obtained silica gel as a bottom, placing a square wire netting on the silica gel, pouring the prepared transparent resin into a mold taking the silica gel as a bottom, enabling the square wire netting to be embedded in the middle of the transparent resin, enabling the square wire netting for increasing the rigidity of the resin plate to be embedded on the taken transparent resin plate, and re-engraving the roughness of the crack surface of the highly accurate sample A or sample B.
And installing the vacuum pressure gauge in the measuring hole, arranging the grouting pipe and the suction pipe in the grouting hole and the suction hole respectively, and winding the pipeline by using an adhesive tape to ensure the sealing effect of the device.
The experimental method for repairing the concrete cracks of the membrane bag by vacuum grouting by adopting the experimental device comprises the following steps:
step1. Preparation of materials: preparing a main body bearing frame, a telescopic rod piece, a sample fixing frame, concrete, a film bag concrete sample, a counter-force frame, a silica gel cushion layer, a magnet, a vacuum cover, a grouting hole, a suction hole, a measuring hole, a vacuum pressure gauge, grouting equipment, vacuum suction equipment, mortar, an acrylic plate and square wire netting;
step2, manufacturing a main body bearing frame: the method comprises the steps that a main body bearing frame is made of stainless steel materials in a processing plant and comprises a telescopic rod piece and a sample fixing frame;
step3, preparing a film bag concrete sample: arranging a film bag in a film bag concrete sample mold and fixing the film bag, pouring the prepared concrete into the mold, removing the mold after the concrete is fully solidified to prepare a film bag concrete sample, and separating the film bag concrete sample from a crack to obtain two completely matched samples A and B;
step4, preparing a silica gel cushion layer: arranging a die with the surface of the film bag concrete sample, where cracks exist, as a bottom, arranging strip magnets on the surface of the sample at certain intervals, pouring the silica gel added with the hardening agent into the die, and taking out the silica gel after the silica gel is hardened to obtain a silica gel cushion layer;
step5, preparing a transparent experimental sample: pouring the silica gel into a mold with the sample A or the sample B as a bottom, and taking out the mold after the silica gel is hardened; then taking the obtained silica gel as a bottom, placing a square wire netting on the silica gel, pouring the prepared transparent resin into a mold taking the silica gel as a bottom, so that the square wire netting is embedded in the middle of the transparent resin, and the taken transparent resin plate is embedded with the square wire netting for increasing the rigidity of the resin plate and is re-engraved with the roughness of the crack surface of the highly accurate sample A or sample B;
step6, manufacturing a vacuum cover: the method comprises the steps of manufacturing a vacuum cover by adopting an acrylic plate, wherein the vacuum cover is in a three-dimensional shape, the size of a bottom plate is the same as that of a membrane bag concrete sample, the middle of the vacuum cover is a hollow cuboid, rib plates are adopted between the cuboid and the bottom plate for connection, bonding and fixing, grouting holes, suction holes and measuring holes are reserved at the upper part of the vacuum cover, and the apertures of the three holes are the same;
step7. Installation of the experimental device: placing a film bag concrete sample on a sample fixing frame and fixing the film bag concrete sample, placing a silica gel cushion layer on the film bag concrete sample, then placing a vacuum cover on the upper part of the silica gel cushion layer, and fixing the three into a unified whole by adjusting the position of a counterforce frame nut to apply acting force;
step8, installing a vacuum pressure gauge in the measuring hole, winding a grouting pipe and a suction pipe by adopting a raw adhesive tape, and then respectively arranging the grouting pipe and the suction pipe in the grouting hole and the suction hole to ensure the tightness of the whole device;
step9, adopting vacuum suction equipment to suck air in the cracks of the vacuum cover and the film bag concrete sample, and determining the vacuum degree in the cracks by observing the indication number of a vacuum pressure gauge;
step10. Grouting: preparing mortar according to a certain water-cement ratio, then injecting the mortar into grouting equipment, and adjusting the initial grouting pressure of the grouting equipment to inject the mortar into a crack through a grouting hole;
step11, adjusting the angles of the film bag concrete samples by adjusting the heights of telescopic rods in the main body bearing frame, so as to achieve the purpose of simulating crack vacuum grouting experiments of different angles of the film bag concrete in engineering;
step12: in the experimental process, the initial grouting pressure of the mortar, the vacuum degree and the inclination angle of the inside of the crack are changed, the penetration filling condition of the mortar in the crack is observed, and the vacuum degree required by vacuum grouting of different cracks is determined.
The invention has the following beneficial effects:
1. the invention fills cracks by vacuum grouting, and aims to: (1) the air and the water in the crack are pumped away by vacuumizing the inside of the crack, particularly for the micro crack in the crack, so that the resistance action of the slurry in the filling process is reduced; (2) a negative pressure effect can be generated between the crack and the external environment under the vacuum effect, so that larger osmotic force is provided for slurry, the micro crack and the inside of the crack are fully filled, and a better engineering effect is achieved for repairing the crack of the membrane bag concrete or building the coral sand foundation.
2. The invention adopts silica gel and transparent resin to accurately etch the crack surface of the concrete sample of the membrane bag for experiments, and aims at: (1) realizing visualization of crack grouting, and fully knowing the seepage and diffusion conditions of slurry in cracks; (2) the vacuum degree and grouting pressure required by the vacuum grouting of the cracks in different forms are determined by comparing the diffusion filling effect of the slurry on the crack surface under the actions of different vacuum degrees, different inclination angles and different opening degrees, and the existing crack grouting repair technology is promoted and improved.
3. According to the invention, the inclination degree of the sample is adjusted by adjusting the height of the telescopic rod piece in the main body bearing frame, so that crack vacuum grouting experiments with different inclination angles can be rapidly realized, the experiment implementation difficulty is reduced, and the progress is accelerated.
4. The invention takes the surface of a film bag concrete sample as a bottom to manufacture a silica gel cushion layer, so that the cushion layer is completely attached to the surface of the sample; the adhesion degree between the cushion layer and the sample is further strengthened through the mutual adsorption of the magnets, the tightness of the experimental device is ensured, and the implementation of a vacuum grouting experiment is ensured.
5. The vacuum cover structure which is designed independently is made of transparent acrylic plate materials, so that the strength stability of the device is guaranteed, grouting visual research is realized, and the seepage condition of slurry in the grouting process is convenient to observe.
6. The reaction frame is used for fixedly connecting the vacuum cover, the cushion layer and the sample, and the tightness of the experimental device can be ensured by changing the positions of the nuts of the reaction frame and adjusting the interaction force among the three; simultaneously, utilize reaction frame to carry out fixed connection, its simple structure, the operation of being convenient for.
7. According to the invention, the vacuum degree in the crack is determined by observing the indication number of the vacuum pressure gauge, so that crack grouting experiments under the action of different vacuum degrees are realized, the accuracy of experimental results is improved, and the vacuum degree required by different crack vacuum grouting is determined.
8. The device is easy to manufacture, simple to operate and low in cost, and has wide practical significance and application prospect in engineering.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the whole device of the present invention.
FIG. 2 is a schematic view of the vacuum enclosure, cushion and sample placement of the present invention.
FIG. 3 is a schematic view of a vacuum enclosure of the present invention.
FIG. 4 is a schematic cross-sectional view of a mat according to the present invention.
In the figure: the main body bearing frame 1, the telescopic rod 2, the sample fixing frame 3, the concrete, the film bag concrete sample 5, the counterforce frame 6, the silica gel cushion 7, the magnet 8, the vacuum cover 9, the grouting hole 10, the suction hole 11, the measuring hole 12, the vacuum pressure gauge 13, the grouting equipment 14, the vacuum suction equipment 15, the mortar 16, the acrylic plate and the square wire netting.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-4, an experimental device for repairing a concrete crack of a membrane bag by adopting vacuum grouting comprises a main body bearing frame 1, wherein a sample fixing frame 3 is arranged on the top support of the main body bearing frame 1, and a membrane bag concrete sample 5, a silica gel cushion layer 7 and a vacuum cover 9 are arranged on the sample fixing frame 3 through a counter-force frame 6; the vacuum cover 9 is provided with a grouting hole 10, a suction hole 11 and a measuring hole 12; the grouting hole 10 is connected with a grouting device 14, and the suction hole 11 is connected with a vacuum suction device 15; a vacuum pressure gauge 13 is mounted on the measuring hole 12. The experimental device can be used for simulating and solving the problems that slurry cannot enter cracks due to insufficient removal of water vapor in the cracks and the micro cracks cannot be filled to damage the cracks and influence the durability of the engineering in the film bag concrete crack repairing engineering, so that data reference is provided for follow-up actual construction, and the vacuum grouting of the cracks of the film bag concrete at different angles in the engineering practice is expected to be obtained; and in the experimental process, the initial grouting pressure of the mortar, the vacuum degree and the inclination angle of the inside of the crack are changed, the penetration filling condition of the mortar in the crack is observed, the vacuum degree required by vacuum grouting of different cracks is determined, and reference data are provided for the follow-up actual engineering construction.
Further, the main body bearing frame 1 is formed by splicing and welding stainless steel materials, and comprises a telescopic rod 2 arranged at the top of the main body bearing frame 1, the top of the telescopic rod 2 is hinged to support the sample fixing frame 3, and the inclination angle of the sample fixing frame 3 is changed by adjusting the telescopic rod 2. The main body bearing frame 1 can be used for providing a supporting foundation for the whole experimental device, so that the whole device is supported and fixed.
Furthermore, the vacuum cover 9 is made of acrylic plate material by cementing, and the size of the vacuum cover 9 is the same as that of the film bag concrete sample 5. The vacuum cover 9 is convenient to form a closed experiment space, so that the follow-up vacuumizing is convenient, and the vacuum degree required by the experiment is ensured.
Further, the silica gel cushion layer 7 is formed by pouring the silica gel added with the hardening agent into a mold with the surface of the film bag concrete sample 5 with cracks as the bottom, and taking out the mold after the silica gel is hardened; the contact surface between the silica gel cushion middle 7 and the film bag concrete sample 5 is provided with a bar magnet 8. The sealing effect is very good through the silica gel cushion 7.
Further, the grouting equipment 14 is internally provided with mortar 16, and is used for injecting the mortar 16 into the cracks of the film bag concrete sample 5 through the grouting holes 10, and observing the diffusion filling condition of the mortar in the cracks under the action of different grouting pressures. The grouting equipment 14 can be used for achieving the purpose of pouring mortar.
Further, the vacuum suction device 15 is used for sucking out air inside the cracks of the vacuum hood 9 and the film bag concrete sample 5, and determining the vacuum degree inside the cracks by the indication of the vacuum pressure gauge 13. The vacuum gauge 13 can be used for counting the vacuum degree during optimal grouting, so that experimental data are provided for the follow-up engineering practice.
Further, in the preparation process of the film bag concrete sample 5, concrete is poured into a film bag concrete sample mold, and the mold is removed after the concrete is fully solidified to obtain the film bag concrete sample 5; in the concrete pouring process, placing a membrane bag in the membrane bag concrete sample mould so as to divide the membrane bag concrete sample 5 into two completely matched samples A and B, thereby reducing factors of manually obtaining a fracture surface and weakening influence on an experiment rule; the concrete is prepared by mixing cement, sand and water according to a certain water-cement ratio. Through the above-mentioned technological process, can be used for preparing the concrete sample 5 of the membrane bag, and then for the experimental process, provide the sample.
Further, the film bag concrete sample 5 is obtained by pouring silica gel into a mold with a sample A or a sample B as a bottom, and taking out the mold after the silica gel is hardened; then taking the obtained silica gel as a bottom, placing a square wire netting on the silica gel, pouring the prepared transparent resin into a mold taking the silica gel as a bottom, enabling the square wire netting to be embedded in the middle of the transparent resin, enabling the square wire netting for increasing the rigidity of the resin plate to be embedded on the taken transparent resin plate, and re-engraving the roughness of the crack surface of the highly accurate sample A or sample B. Through the preparation process, the method can be used for providing a real test environment.
Further, the vacuum pressure gauge 13 is installed in the measuring hole 12, the grouting pipe and the suction pipe are respectively arranged in the grouting hole 10 and the suction hole 11, and the sealing effect of the device is ensured by winding the pipe by using the adhesive tape.
Preferably, the transparent resin adopts K39 transparent resin, and can accurately etch the crack surface of the concrete sample of the film bag for experiments.
Example 2:
the experimental method for repairing the concrete cracks of the membrane bag by vacuum grouting by adopting the experimental device comprises the following steps:
step1. Preparation of materials: preparing a main body bearing frame 1, a telescopic rod 2, a sample fixing frame 3, concrete, a film bag concrete sample 5, a counterforce frame 6, a silica gel cushion 7, a magnet 8, a vacuum cover 9, a grouting hole 10, a suction hole 11, a measuring hole 12, a vacuum pressure gauge 13, a grouting device 14, a vacuum suction device 15, mortar 16, an acrylic plate and square wire netting;
step2, manufacturing a main body bearing frame 1: the method comprises the steps that a main body bearing frame 1 is made of stainless steel materials in a processing plant, and the main body bearing frame 1 comprises a telescopic rod 2 and a sample fixing frame 3;
step3, preparing a film bag concrete sample 5: arranging a film bag in a film bag concrete sample mold and fixing the film bag, pouring the prepared concrete into the mold, removing the mold after the concrete is fully solidified to prepare a film bag concrete sample, and separating the film bag concrete sample from a crack to obtain two completely matched samples A and B;
step4, preparing a silica gel cushion layer 7: arranging a die with the surface of the film bag concrete sample, where cracks exist, as a bottom, arranging strip magnets 8 on the surface of the sample at certain intervals, then pouring silica gel added with a hardening agent into the die, and taking out the silica gel after the silica gel is hardened to obtain a silica gel cushion layer 7;
step5, preparing a transparent experimental sample: pouring the silica gel into a mold with the sample A or the sample B as a bottom, and taking out the mold after the silica gel is hardened; then taking the obtained silica gel as a bottom, placing a square wire netting on the silica gel, pouring the prepared transparent resin into a mold taking the silica gel as a bottom, so that the square wire netting is embedded in the middle of the transparent resin, and the taken transparent resin plate is embedded with the square wire netting for increasing the rigidity of the resin plate and is re-engraved with the roughness of the crack surface of the highly accurate sample A or sample B;
step6, manufacturing a vacuum cover 9: the method comprises the steps of manufacturing a vacuum cover 9 by adopting an acrylic plate, wherein the vacuum cover 9 is in a three-dimensional shape, the size of a bottom plate is the same as that of a membrane bag concrete sample 5, the middle of the vacuum cover is a hollow cuboid, rib plates are adopted between the cuboid and the bottom plate for connection and bonding fixation, a grouting hole 10, a suction hole 11 and a measuring hole 12 are reserved at the upper part of the vacuum cover, and the apertures of the three holes are the same;
step7. Installation of the experimental device: placing and fixing the film bag concrete sample 5 on the sample fixing frame 3, placing the silica gel cushion 7 on the film bag concrete sample 5, then placing the vacuum cover 9 on the upper part of the silica gel cushion 7, and fixing the three into a unified whole by adjusting the nut position of the counterforce frame 6 and applying acting force;
step8, installing a vacuum pressure gauge 13 in the measuring hole 12, winding a grouting pipe and a suction pipe by adopting a raw adhesive tape, and then respectively arranging the grouting pipe and the suction pipe in the grouting hole and the suction hole to ensure the tightness of the whole device;
step9, pumping out air in the cracks of the vacuum cover and the film bag concrete sample by adopting a vacuum pumping device 15, and determining the vacuum degree in the cracks by observing the indication number of a vacuum pressure gauge;
step10. Grouting: preparing mortar according to a certain water-cement ratio, then injecting the mortar into grouting equipment 14, and adjusting the initial grouting pressure of the grouting equipment to inject the mortar into a crack through a grouting hole;
step11, adjusting the angles of the film bag concrete samples 5 by adjusting the heights of the telescopic rod pieces 2 in the main body bearing frame 1, so as to achieve the purpose of simulating crack vacuum grouting experiments of different angles of the film bag concrete in engineering;
step12: in the experimental process, the initial grouting pressure of the mortar, the vacuum degree and the inclination angle of the inside of the crack are changed, the penetration filling condition of the mortar in the crack is observed, and the vacuum degree required by vacuum grouting of different cracks is determined.
Claims (4)
1. An experimental device for repairing a membrane bag concrete crack by adopting vacuum grouting, which is characterized in that: the device comprises a main body bearing frame (1), wherein a sample fixing frame (3) is arranged on the top support of the main body bearing frame (1), and a film bag concrete sample (5), a silica gel cushion layer (7) and a vacuum cover (9) are arranged on the sample fixing frame (3) through a counter-force frame (6); a grouting hole (10), a suction hole (11) and a measuring hole (12) are arranged on the vacuum cover (9); the grouting hole (10) is connected with grouting equipment (14), and the suction hole (11) is connected with vacuum suction equipment (15); a vacuum pressure gauge (13) is arranged on the measuring hole (12);
the main body bearing frame (1) is formed by splicing and welding stainless steel materials and comprises a telescopic rod (2) arranged at the top of the main body bearing frame (1), the top of the telescopic rod (2) is hinged to a sample fixing frame (3), and the inclination angle of the sample fixing frame (3) is changed by adjusting the telescopic rod (2);
the silica gel cushion layer (7) is formed by pouring silica gel added with a hardening agent into a mold with the surface of a film bag concrete sample (5) with cracks as the bottom, and taking out the mold after the silica gel is hardened; a strip magnet (8) is arranged on the contact surface of the silica gel cushion layer (7) and the membrane bag concrete sample (5);
mortar (16) is arranged in the grouting equipment (14), and is used for injecting the mortar (16) into the cracks of the film bag concrete sample (5) through the grouting holes (10) and observing the diffusion filling condition of the mortar in the cracks under the action of different grouting pressures;
the vacuum suction device (15) is used for sucking out air in the cracks of the vacuum cover (9) and the film bag concrete sample (5) and determining the vacuum degree in the cracks through the indication of the vacuum pressure gauge (13);
in the preparation process of the film bag concrete sample (5), concrete is poured into a film bag concrete sample mould, and the mould is removed after the concrete is fully solidified to obtain the film bag concrete sample (5); in the concrete pouring process, a film bag is placed in the film bag concrete sample mould, so that a film bag concrete sample (5) is divided into two completely matched samples A and B, factors of manually obtaining a crack surface are reduced, and influence on an experimental rule is weakened; the concrete is prepared by mixing cement, sand and water according to a certain water-cement ratio;
pouring the silica gel into a mold with the sample A or the sample B as a bottom, and taking out the mold after the silica gel is hardened; then taking the obtained silica gel as a bottom, placing a square wire netting on the silica gel, pouring the prepared transparent resin into a mold taking the silica gel as a bottom, enabling the square wire netting to be embedded in the middle of the transparent resin, enabling the square wire netting for increasing the rigidity of the resin plate to be embedded on the taken transparent resin plate, and re-engraving the roughness of the crack surface of the highly accurate sample A or sample B.
2. The experimental device for repairing a concrete crack of a membrane bag by vacuum grouting according to claim 1, wherein the experimental device comprises the following components: the vacuum cover (9) is made of acrylic plate materials through cementing, and the size of the vacuum cover (9) is the same as that of the film bag concrete sample (5).
3. The experimental device for repairing a concrete crack of a membrane bag by vacuum grouting according to claim 1, wherein the experimental device comprises the following components: the vacuum pressure gauge (13) is arranged in the measuring hole (12), the grouting pipe and the suction pipe are respectively arranged in the grouting hole (10) and the suction hole (11), and the sealing effect of the device is ensured by winding the pipeline by adopting the adhesive tape.
4. An experimental method for repairing a concrete crack of a membrane bag by vacuum grouting by adopting the experimental device according to any one of claims 1 to 3, which is characterized by comprising the following steps:
step1. Preparation of materials: preparing a main body bearing frame (1), a telescopic rod (2), a sample fixing frame (3), concrete, a film bag concrete sample (5), a counter-force frame (6), a silica gel cushion layer (7), a magnet (8), a vacuum cover (9), a grouting hole (10), a suction hole (11), a measuring hole (12), a vacuum pressure gauge (13), grouting equipment (14), vacuum suction equipment (15), mortar (16), an acrylic plate and square wire netting;
step2, manufacturing a main body bearing frame (1): the method comprises the steps that a main body bearing frame (1) is manufactured by adopting stainless steel materials in a processing plant, and the main body bearing frame (1) comprises a telescopic rod piece (2) and a sample fixing frame (3);
step3, preparing a film bag concrete sample (5): arranging a film bag in a film bag concrete sample mold and fixing the film bag, pouring the prepared concrete into the mold, removing the mold after the concrete is fully solidified to prepare a film bag concrete sample, and separating the film bag concrete sample from a crack to obtain two completely matched samples A and B;
step4, preparing a silica gel cushion layer (7): arranging a die with the surface of a film bag concrete sample, where cracks exist, as a bottom, arranging strip magnets (8) on the surface of the sample at certain intervals, then pouring silica gel added with a hardening agent into the die, and taking out the silica gel after the silica gel is hardened to obtain a silica gel cushion layer (7);
step5, preparing a transparent experimental sample: pouring the silica gel into a mold with the sample A or the sample B as a bottom, and taking out the mold after the silica gel is hardened; then taking the obtained silica gel as a bottom, placing a square wire netting on the silica gel, pouring the prepared transparent resin into a mold taking the silica gel as a bottom, so that the square wire netting is embedded in the middle of the transparent resin, and the taken transparent resin plate is embedded with the square wire netting for increasing the rigidity of the resin plate and is re-engraved with the roughness of the crack surface of the highly accurate sample A or sample B;
step6, manufacturing a vacuum cover (9): the method comprises the steps of manufacturing a vacuum cover (9) by adopting an acrylic plate, wherein the vacuum cover (9) is in a three-dimensional shape, the size of a bottom plate is the same as that of a membrane bag concrete sample (5), the middle of the vacuum cover is a hollow cuboid, rib plates are adopted between the cuboid and the bottom plate for connection and bonding fixation, a grouting hole (10), a suction hole (11) and a measuring hole (12) are reserved at the upper part of the vacuum cover, and the apertures of the three holes are the same;
step7. Installation of the experimental device: placing a film bag concrete sample (5) on a sample fixing frame (3) and fixing the film bag concrete sample, placing a silica gel cushion layer (7) on the film bag concrete sample (5), then placing a vacuum cover (9) on the upper part of the silica gel cushion layer (7), and fixing the three into a unified whole by adjusting the nut position of a counterforce frame (6) and applying acting force;
step8, installing a vacuum pressure gauge (13) in the measuring hole (12), winding a grouting pipe and a suction pipe by adopting a raw adhesive tape, and then arranging the grouting pipe and the suction pipe in the grouting hole and the suction hole respectively to ensure the tightness of the whole device;
step9, adopting a vacuum suction device (15) to suck air in the cracks of the vacuum cover and the film bag concrete sample, and determining the vacuum degree in the cracks by observing the indication number of a vacuum pressure gauge;
step10. Grouting: preparing mortar according to a certain water-cement ratio, then injecting the mortar into grouting equipment (14), and adjusting the initial grouting pressure of the grouting equipment to inject the mortar into a crack through a grouting hole;
step11, adjusting the angles of the film bag concrete samples (5) by adjusting the heights of telescopic rods (2) in the main body bearing frame (1), so as to achieve the purpose of simulating crack vacuum grouting experiments of different angles of the film bag concrete in engineering;
step12: in the experimental process, the initial grouting pressure of the mortar, the vacuum degree and the inclination angle of the inside of the crack are changed, the penetration filling condition of the mortar in the crack is observed, and the vacuum degree required by vacuum grouting of different cracks is determined.
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5311766A (en) * | 1992-07-07 | 1994-05-17 | The United States Of America As Represented By The United States Department Of Energy | Method and apparatus for determining two-phase flow in rock fracture |
| CN205826479U (en) * | 2016-07-18 | 2016-12-21 | 三峡大学 | Visualization seepage flow test device for the test of rock fracture seepage simulation |
| CN206114469U (en) * | 2016-10-20 | 2017-04-19 | 北京市公路桥梁建设集团锐诚工程试验检测有限公司 | That simulates different filler cracks moves water slip casting test device |
| CN106638475A (en) * | 2016-11-18 | 2017-05-10 | 中国电建集团成都勘测设计研究院有限公司 | Earth and rockfill dam body crack repair method |
| CN108828195A (en) * | 2018-03-14 | 2018-11-16 | 同济大学 | It is a kind of to simulate the laboratory testing rig returned on pile-end post-grouting slurries and test method |
| CN109342275A (en) * | 2018-12-07 | 2019-02-15 | 中煤科工集团西安研究院有限公司 | Simulate the visualization crack grouting experimental rig and method of more master variables |
| CN109457735A (en) * | 2018-11-16 | 2019-03-12 | 中铁二十三局集团第四工程有限公司 | A kind of concrete wall and the restorative procedure in bottom plate infiltration crack |
| CN109709311A (en) * | 2018-10-17 | 2019-05-03 | 广东省长大公路工程有限公司 | A kind of indoor simulation device being molded into slurry research for vault band |
| CN110196213A (en) * | 2019-05-15 | 2019-09-03 | 三峡大学 | A kind of visualized experiment device and method for study of rocks crack induction type grouting parameter |
| CN110296928A (en) * | 2019-07-19 | 2019-10-01 | 三峡大学 | The device and method of visualization fracture seepage is simulated using magnetic fluid |
| CN112114094A (en) * | 2020-10-15 | 2020-12-22 | 四川大学 | Visualization device for grouting repair of fractured rock sample and use method |
| JP2021038111A (en) * | 2019-09-02 | 2021-03-11 | 株式会社フローリック | Cement admixture, and cement composition |
| CN112730742A (en) * | 2020-12-18 | 2021-04-30 | 三峡大学 | Visualization device for researching crack plugging of underwater structure and using method |
| CN111042232B (en) * | 2019-12-12 | 2021-04-30 | 三峡大学 | Device for debridement and crack repair of underwater film bag concrete wall and construction method |
| CN113152922A (en) * | 2021-04-13 | 2021-07-23 | 三峡大学 | Novel device and method for repairing wallboard cracks through magnetic mortar |
| CN113250483A (en) * | 2021-05-12 | 2021-08-13 | 三峡大学 | Device and method for restoring building cracks in embedded and prefabricated magnetic attraction end guiding mode based on magnetic force |
-
2022
- 2022-01-09 CN CN202210018783.0A patent/CN114460281B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5311766A (en) * | 1992-07-07 | 1994-05-17 | The United States Of America As Represented By The United States Department Of Energy | Method and apparatus for determining two-phase flow in rock fracture |
| CN205826479U (en) * | 2016-07-18 | 2016-12-21 | 三峡大学 | Visualization seepage flow test device for the test of rock fracture seepage simulation |
| CN206114469U (en) * | 2016-10-20 | 2017-04-19 | 北京市公路桥梁建设集团锐诚工程试验检测有限公司 | That simulates different filler cracks moves water slip casting test device |
| CN106638475A (en) * | 2016-11-18 | 2017-05-10 | 中国电建集团成都勘测设计研究院有限公司 | Earth and rockfill dam body crack repair method |
| CN108828195A (en) * | 2018-03-14 | 2018-11-16 | 同济大学 | It is a kind of to simulate the laboratory testing rig returned on pile-end post-grouting slurries and test method |
| CN109709311A (en) * | 2018-10-17 | 2019-05-03 | 广东省长大公路工程有限公司 | A kind of indoor simulation device being molded into slurry research for vault band |
| CN109457735A (en) * | 2018-11-16 | 2019-03-12 | 中铁二十三局集团第四工程有限公司 | A kind of concrete wall and the restorative procedure in bottom plate infiltration crack |
| CN109342275A (en) * | 2018-12-07 | 2019-02-15 | 中煤科工集团西安研究院有限公司 | Simulate the visualization crack grouting experimental rig and method of more master variables |
| CN110196213A (en) * | 2019-05-15 | 2019-09-03 | 三峡大学 | A kind of visualized experiment device and method for study of rocks crack induction type grouting parameter |
| CN110296928A (en) * | 2019-07-19 | 2019-10-01 | 三峡大学 | The device and method of visualization fracture seepage is simulated using magnetic fluid |
| JP2021038111A (en) * | 2019-09-02 | 2021-03-11 | 株式会社フローリック | Cement admixture, and cement composition |
| CN111042232B (en) * | 2019-12-12 | 2021-04-30 | 三峡大学 | Device for debridement and crack repair of underwater film bag concrete wall and construction method |
| CN112114094A (en) * | 2020-10-15 | 2020-12-22 | 四川大学 | Visualization device for grouting repair of fractured rock sample and use method |
| CN112730742A (en) * | 2020-12-18 | 2021-04-30 | 三峡大学 | Visualization device for researching crack plugging of underwater structure and using method |
| CN113152922A (en) * | 2021-04-13 | 2021-07-23 | 三峡大学 | Novel device and method for repairing wallboard cracks through magnetic mortar |
| CN113250483A (en) * | 2021-05-12 | 2021-08-13 | 三峡大学 | Device and method for restoring building cracks in embedded and prefabricated magnetic attraction end guiding mode based on magnetic force |
Non-Patent Citations (1)
| Title |
|---|
| 岩石裂隙可视化渗流装置可行性及试验研究;刘 杰 等;岩土力学;第41卷(第12期);4127-4137 * |
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