CN111472568A - Concrete crack repairing device and method - Google Patents
Concrete crack repairing device and method Download PDFInfo
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- CN111472568A CN111472568A CN202010322984.0A CN202010322984A CN111472568A CN 111472568 A CN111472568 A CN 111472568A CN 202010322984 A CN202010322984 A CN 202010322984A CN 111472568 A CN111472568 A CN 111472568A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
- E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
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Abstract
The invention relates to a concrete crack repairing device and a repairing method, relates to the technical field of concrete structures, and solves the problems that the crack filling integrity is difficult to guarantee and the filling effect is poor. S1: detecting cracks; s2: marking a drilling point; s3: drilling; s4: cleaning cracks; s5: burying a pipe; s6: placing a pulp guide hopper and a pulp pressing disc; s7: testing water; s8: primary grouting; s9: secondary grouting; s10: chiseling and leveling; the method is convenient for observing the grouting condition inside the crack in real time in the grouting process, ensures that the crack is full of grouting, and has the advantages of simple and convenient operation, easy construction, quick repair and low cost after the grouting is finished.
Description
Technical Field
The invention relates to the technical field of concrete structures, in particular to a concrete crack repairing device and a concrete crack repairing method.
Background
In the building construction and use process, because factors such as structure stress condition, basic deformation, control by temperature change can lead to the concrete structure condition that the crack appears, when the crack is broad or have the development, when endangering the durability of structure, just need repair, seal the crack, prevent the invasion of steam, chemical substance and carbon dioxide.
The existing Chinese patent with the publication number of CN206144187U proposes a concrete crack repairing device, which comprises a water sprayer for spraying water, a dry powder sprayer for spraying dry cement powder, a vibration device for enabling the dry powder sprayer to have adjustable vibration frequency, a control system for controlling the operation of equipment, an equipment handle and an equipment framework, wherein the vibration device is respectively connected with the equipment framework and the dry powder sprayer, and the water sprayer, the dry powder sprayer, the vibration device, the control system and the equipment handle are all fixedly connected on the equipment framework.
The above prior art solutions have the following drawbacks: in the use, judge the crack depth through artifical observation to repair the crack through the mode of artificial prejudgement, because the crack is irregular shape, artifical be difficult to ensure the crack filling complete through the device, it is relatively poor to fill the effect.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a concrete crack repairing device which is convenient to control the grouting amount, ensures the sufficient grouting, has a simple structure and is easy to construct.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a concrete crack patching device, is including squeezing into a plurality of concrete prefabricated pipes in the crack, a plurality of concrete prefabricated pipes arrange the setting in proper order along cracked extending direction respectively, still include a plurality of arranging respectively leading in the concrete prefabricated intraductal thick liquid fill, lead the outer wall of thick liquid fill with the inner wall laminating setting of concrete prefabricated pipe, lead the thick liquid fill with concrete prefabricated pipe week side equal symmetry has seted up the twice and has led the dressing trough, and is a plurality of lead to be connected with a plurality of thick liquid dishes jointly in the thick liquid fill, in the application, it hugs closely in concrete base face and seals cracked opening to press the thick liquid dish.
By adopting the technical scheme, the concrete prefabricated pipe is pre-buried in the crack, can be used as a filler to play a filling role in the crack, and simultaneously, in the process of grouting the crack, grout injected into the concrete prefabricated pipe can enter the crack through the grout guide groove, so that crack grouting is realized, and the functions are various; put into when the grout guide bucket in the precast concrete pipe can guide the thick liquid to get into the crack equally, play simultaneously and seal and open the effect of the grout guide groove of precast concrete pipe, the mud jacking dish plays and carries out confined effect to the opening of crack, the cooperation through leading thick liquid bucket and mud jacking dish promptly, be convenient for when a certain section slip casting to the crack, seal around this section crack, guarantee this section crack slip casting abundant, after the slip casting is accomplished, directly take out and lead thick liquid bucket and mud jacking dish, and is simple and convenient to operate, and easy construction.
The present invention in a preferred example may be further configured to: and a blocking edge is fixed at the edge of the top end of the pulp guide hopper along the circumferential direction of the pulp guide hopper, and clamping grooves for penetrating the pulp pressing disc are symmetrically formed in the blocking edge.
Through adopting above-mentioned technical scheme, to leading the inside slip casting in-process of thick liquid fill, keep off along playing and enclose the fender effect, reduce the condition that the thick liquid oozes outward, keep off simultaneously along playing the effect of installation and location mud jacking dish, through the installation and the dismantlement of the mud jacking dish of being convenient for of draw-in groove between adjacent leading thick liquid fill.
The present invention in a preferred example may be further configured to: and two ends of the slurry pressing disc are respectively fixed with an abutting arc-shaped sheet which is abutted against the inner wall of the baffle edge.
Through adopting above-mentioned technical scheme, utilize the butt arc piece and the butt of mud jacking dish inner wall, can fix a position mud jacking dish, reduce the offset of mud jacking dish, ensure that the crack slip casting is filled fully.
The present invention in a preferred example may be further configured to: a plurality of grout outlet holes are formed in the bottom wall of the grout pressing disc at equal intervals, and a plurality of hole sealing plugs are inserted into the grout outlet holes and are connected with one another through connecting strips.
By adopting the technical scheme, in the grouting process, the grouting situation in the crack can be observed conveniently by utilizing the grout outlet, whether grouting in the crack is sufficient or not can be judged conveniently by returning grout from the grout outlet, and the grout outlet is sealed by utilizing the hole sealing plug and the connecting strip.
The present invention in a preferred example may be further configured to: the precast concrete pipe with lead the thick liquid fill and all be hourglass hopper-shaped setting.
Through adopting above-mentioned technical scheme, it is faster to be the precast concrete pipe that leaks hopper-shaped setting and lead the thick liquid speed of fighting, leads the thick liquid effect better.
One of the purposes of the invention is to provide a concrete crack repairing method which is convenient to obtain the concrete structure of the crack, has better filling effect, plump crack grouting, process saving, simple and convenient operation, easy construction and low cost.
A concrete crack repairing method comprises the following steps:
s1: detecting the crack, namely injecting a detection agent containing metal powder into the crack along the trend of the crack, irradiating the inside of the crack by using an X-ray machine, and detecting and positioning the depth length of the crack by using a computer to obtain a crack image;
s2: marking drilling points, marking a plurality of crack holes with larger crack depths according to the crack conditions of a crack image map, obtaining drilling points 1, 2 and 2, and marking corresponding marks on the concrete base surface according to the corresponding drilling points of the crack influence map;
s3: drilling, namely drilling corresponding positions of the cracks according to the prepared marks, polishing base surfaces on two sides of the cracks to form a bucket-shaped hole extending along the depth direction of the cracks;
s4: cleaning the cracks, and after drilling is finished, washing the cracks and the bucket-shaped holes along the vertical direction;
s5: embedding pipes, namely sequentially embedding a plurality of prefabricated concrete pipes prefabricated in advance into a plurality of bucket-shaped holes, communicating slurry guide grooves of the prefabricated concrete pipes with the inner walls of cracks, filling sealing slurry into gaps between the prefabricated concrete pipes and corresponding concrete structure base planes, and tightly plugging the gaps;
s6: placing a slurry guide hopper and a slurry pressing disc, sequentially placing a plurality of slurry guide hoppers in different concrete prefabricated pipes, rotating the slurry guide hoppers to enable slurry guide grooves of the slurry guide hoppers to be staggered with slurry guide grooves of the concrete prefabricated pipes, namely sealing the slurry guide grooves of the concrete prefabricated pipes by utilizing the peripheral walls of the slurry guide hoppers, marking a 1 st slurry guide hopper, a 2 nd slurry guide hopper and a 2 nd slurry guide hopper, then placing the slurry pressing disc between the adjacent slurry guide hoppers, and marking a 1 st slurry pressing disc, a 2 nd slurry pressing disc and a 3 rd slurry pressing disc;
s7: testing water, namely using 0.1-0.2 mpa pressure water for a water seepage test;
s8: the first grouting is carried out, a 1 st slurry guide hopper is adjusted before grouting, a slurry guide groove of the 1 st slurry guide hopper is communicated with a slurry guide groove of a corresponding concrete prefabricated pipe, a connecting strip and a hole sealing plug on a 1 st grouting disc are uncovered, a grouting nozzle of a grouting machine is aligned to the 1 st slurry guide hopper for grouting in the grouting process, the pressure is kept at 0.2-0.6Mpa, the slurry outlet condition of a slurry outlet of the 1 st grouting disc is observed, when slurry seeps out from each slurry outlet, the grouting is stopped, the 1 st slurry guide hopper is rotated to seal the slurry guide groove of the corresponding concrete prefabricated pipe, the slurry outlet of the first grouting disc is sealed by using the connecting strip and the hole sealing plug, the same steps are carried out to carry out grouting on the 2 nd slurry guide hopper, and so on until the grouting of the Nth slurry guide hopper is finished;
s9: secondary grouting, namely standing the grout for a period of time after grouting is finished, sequentially taking out the grout guide hoppers in the plurality of concrete prefabricated pipes when the grout is in a semi-solidified state, taking out the grout pressing disc, and sequentially carrying out secondary grouting on the plurality of concrete prefabricated pipes;
s10: and chiseling and trowelling, and grinding and cleaning redundant concrete burrs after the concrete prefabricated pipe is sealed.
Through adopting above-mentioned technical scheme, utilize the precast concrete pile as filling member and lead thick liquid piece, can fill the great position of crack damage, convenient and fast can be regarded as leading thick liquid piece guide thick liquid simultaneously and get into the crack in, use through the cooperation of leading thick liquid fill and mud jacking dish, the slip casting in-process of being convenient for, the inside slip casting situation in real time observation crack ensures that the crack slip casting is full, and it is swift to repair, low cost.
The present invention in a preferred example may be further configured to: in step S3, the ground surface of the concrete structure is shifted by 2-6cm from the crack to both sides.
By adopting the technical scheme, the operation is convenient, and the damage to the concrete structure is small.
The present invention in a preferred example may be further configured to: in step S3, the drilling axis is at an oblique angle of 30-45 degrees to the fracture during drilling.
By adopting the technical scheme, the bucket-shaped hole is more convenient to form, the operation is simple and convenient, and the damage to the concrete structure is reduced.
The present invention in a preferred example may be further configured to: in step S5, an epoxy resin slurry is used as the sealing slurry.
By adopting the technical scheme, the epoxy resin slurry has good permeability and applicability, is easy to construct, and effectively improves the strength of concrete.
The present invention in a preferred example may be further configured to: in step S8, the cement paste with a water-cement ratio of 1:1 is used as the grout for the primary grouting.
By adopting the technical scheme, the cement paste with the water-cement ratio of 1:1 has good fluidity in cracks and better filling effect.
In summary, the present invention includes at least one of the following advantages:
1. the concrete prefabricated pipe is pre-buried in the crack, can be used as a filler to play a filling role in the crack, and simultaneously, in the process of grouting the crack, grout injected into the concrete prefabricated pipe can enter the crack through the grout guide groove, so that crack grouting is realized, and the functions are various;
2. in the grouting process, the slurry guide hopper is used for switching the closing and opening of the slurry guide groove of the concrete prefabricated pipe, and the grouting disc plays a role in closing the opening of the crack, so that the crack is subjected to segmented grouting, the segmented grouting method ensures that the grouting of each segment of crack is sufficient, and the slurry guide hopper and the grouting disc are directly taken out after the grouting is finished, so that the operation is simple and convenient, and the construction is easy;
3. the grouting hole is used for conveniently observing the grouting condition inside the crack in real time, so that the crack is full in grouting, rapid in repairing and low in cost.
Drawings
FIG. 1 is a schematic view of the construction of the prosthetic device of the present invention;
FIG. 2 is a flow chart of the construction process of the present invention.
Reference numerals: 1. prefabricating a pipe by concrete; 2. a pulp guide hopper; 3. a slurry guide groove; 4. a mud jacking disc; 5. blocking edges; 6. a card slot; 7. abutting the arc-shaped sheet; 8. a slurry outlet; 9. sealing the hole plug; 10. and (4) connecting strips.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the concrete crack repairing device disclosed by the invention comprises a plurality of concrete prefabricated pipes 1 which are driven into a crack, wherein the concrete prefabricated pipes 1 are sequentially arranged along the extending direction of the crack, the concrete crack repairing device further comprises a plurality of slurry guide hoppers 2 which are respectively arranged in the concrete prefabricated pipes 1, the outer walls of the slurry guide hoppers 2 are attached to the inner walls of the concrete prefabricated pipes 1, the concrete prefabricated pipes 1 and the slurry guide hoppers 2 are both in a funnel shape, and two slurry guide grooves 3 are symmetrically formed in the peripheral sides of the slurry guide hoppers 2 and the concrete prefabricated pipes 1. Utilize to lead thick liquid fill 2 and the prefabricated pipe of concrete 1 combined action guide thick liquid and pour into to the crack in, the prefabricated pipe of concrete 1 that is hourglass hopper-shaped setting leads the thick liquid speed faster with leading thick liquid fill 2, leads the thick liquid effect better.
A plurality of mud jacking dishes 4 are connected with jointly in leading thick liquid fill 2, and in the application, mud jacking dish 4 hugs closely in the concrete base face and seals fissured opening, and a plurality of grout outlet 8 have been seted up to the diapire equidistant of mud jacking dish 4, all pegs graft in grout outlet 8 and are provided with a hole stopper 9, and a plurality of hole stoppers 9 set up through connecting strip 10 body coupling. Hole sealing plug 9 and connecting strip 10 seal grout outlet 8, and the slip casting in-process utilizes mud jacking dish 4 to seal the cracked opening between two adjacent prefabricated pipes of concrete 1, reduces the excessive condition of thick liquid, and guarantee slip casting effect pulls down connecting strip 10 and hole sealing plug 9 when needing, utilizes grout outlet 8 to be convenient for observe the slip casting condition in the crack, returns the thick liquid through grout outlet 8, is convenient for judge whether full grout in the crack.
Lead the top border department of thick liquid fill 2 and be fixed with along the circumference of leading thick liquid fill 2 and keep off along 5, keep off along 5 offering two draw-in grooves 6 that are used for wearing to establish mud jacking disk 4, two draw-in grooves 6 are along leading the central axis symmetry setting of thick liquid fill 2. To leading the inside slip casting in-process of thick liquid fill 2, keep off along 5 playing and enclose the fender effect, reduce the condition that the thick liquid oozes outward, keep off simultaneously along 5 playing the effect of installation and location mud jacking dish 4, be convenient for mud jacking dish 4 through draw-in groove 6 adjacent leading the installation and the dismantlement between thick liquid fill 2.
Both ends of the mud jacking disk 4 are fixed with abutting arc-shaped pieces 7 which are abutted against the inner wall of the blocking edge 5, and the bending degree of the abutting arc-shaped pieces 7 is the same as that of the blocking edge 5. Utilize the butt of butt arc piece 7 with 4 inner walls of mud jacking dish, can fix a position mud jacking dish 4, reduce the offset of mud jacking dish 4, ensure that the crack slip casting is filled fully.
One of the purposes of the invention is to provide a concrete crack repairing method which is convenient to obtain the concrete structure of the crack, has better filling effect, plump crack grouting, process saving, simple and convenient operation, easy construction and low cost.
A concrete crack repairing method comprises the following steps:
s1: detecting the crack, namely injecting a detection agent containing metal powder into the crack along the trend of the crack, irradiating the inside of the crack by using an X-ray machine, and detecting and positioning the depth length of the crack by using a computer to obtain a crack image;
s2: marking drilling points, marking a plurality of crack holes with larger crack depths according to the crack conditions of a crack image map, obtaining drilling points 1, 2 and 2, and marking corresponding marks on the concrete base surface according to the corresponding drilling points of the crack influence map;
s3: drilling, namely drilling corresponding positions of the cracks through an air drill according to a prepared mark, polishing base surfaces on two sides of the cracks, wherein the polishing range is that concrete structure base surfaces which are 2-6cm deviated from the cracks to two sides respectively, the axis of the drill hole and the cracks form an oblique angle of 30-45 degrees, and a bucket-shaped hole extending along the depth direction of the cracks is formed through polishing;
s4: cleaning the cracks, and after drilling is finished, washing the cracks and the bucket-shaped holes along the vertical direction;
s5: embedding a plurality of prefabricated concrete pipes 1 prefabricated in advance into a plurality of bucket-shaped holes in sequence, arranging a slurry guide groove 3 of each prefabricated concrete pipe 1 to be communicated with the inner wall of a crack, filling sealing slurry into the gap between each prefabricated concrete pipe 1 and the corresponding concrete structure base surface, and tightly plugging the gap, wherein the sealing slurry is epoxy resin slurry which has good permeability and applicability and is easy to construct, and the strength of concrete is effectively improved;
s6: placing a slurry guide hopper 2 and a slurry pressing disc 4, sequentially placing a plurality of slurry guide hoppers 2 in different precast concrete pipes 1, rotating the slurry guide hoppers 2 to ensure that slurry guide grooves 3 of the slurry guide hoppers 2 are staggered with slurry guide grooves 3 of the precast concrete pipes 1, namely, sealing the slurry guide grooves 3 of the precast concrete pipes 1 by utilizing the peripheral walls of the slurry guide hoppers 2, and marking a 1 st slurry guide hopper 2, a 2 nd slurry guide hopper 2 and a 2 nd slurry guide hopper 2. then placing the slurry pressing disc 4 between the adjacent slurry guide hoppers 2, and marking a 1 st slurry pressing disc 4, a 2 nd slurry pressing disc 4 and a 3 rd slurry pressing disc 4.;
s7: testing water, namely using 0.1-0.2 mpa pressure water for a water seepage test;
s8: and (3) performing primary grouting, adjusting the 1 st slurry guide hopper 2 before grouting, communicating the slurry guide groove 3 of the 1 st slurry guide hopper 2 with the corresponding slurry guide groove 3 of the concrete prefabricated pipe 1, uncovering the connecting strip 10 and the hole sealing plug 9 on the 1 st grouting plate 4, aligning a grouting nozzle of a grouting machine with the 1 st slurry guide hopper 2 to perform grouting in the grouting process, keeping the pressure at 0.2-0.6Mpa, and adopting cement paste with a water-cement ratio of 1:1 for the slurry of the primary grouting and 42.5# common cement for the cement. The cement paste with the water-cement ratio of 1:1 has good fluidity in cracks and better filling effect;
observing the grout outlet condition of the grout outlet 8 of the 1 st grout guide plate 4, stopping grouting when grout seeps out of each grout outlet 8, rotating the 1 st grout guide hopper 2 to seal the grout guide groove 3 corresponding to the concrete prefabricated pipe 1, sealing the grout outlet 8 of the first grout guide plate 4 by using the connecting strip 10 and the hole sealing plug 9, grouting the 2 nd grout guide hopper 2 by the same steps, and so on until the grouting of the Nth grout guide hopper 2 is finished;
s9: secondary grouting, namely standing the grout for a period of time after the grouting is finished, sequentially taking out the grout guide hoppers 2 in the plurality of concrete prefabricated pipes 1 when the grout is in a semi-solidified state, taking out the grout pressing disc 4, and sequentially carrying out secondary grouting on the plurality of concrete prefabricated pipes 1;
s10: chiseling and trowelling, and after the concrete prefabricated pipe 1 is sealed, grinding and cleaning redundant concrete burrs.
The implementation principle and the beneficial effects of the embodiment are as follows:
the concrete prefabricated pipe 1 is pre-buried in a crack, the concrete prefabricated pipe can be used as a filler to play a filling role in a position with larger crack damage, simultaneously, in the process of grouting the crack, grout injected into the concrete prefabricated pipe 1 can enter the crack through the grout guide groove 3 to realize crack grouting, the functions are various, when the grout guide hopper 2 placed in the concrete prefabricated pipe 1 can also guide the grout to enter the crack, the grout guide groove 3 of the concrete prefabricated pipe 1 is simultaneously closed and opened, the grout pressing disc 4 plays a role in closing the opening of the crack, namely, the grout guide hopper 2 and the grout pressing disc 4 are matched, the periphery of a certain section of the crack is conveniently sealed when grouting is performed on the section of the crack, the grouting condition in the crack is conveniently observed in real time through the grout injection hole to ensure the full grouting of the crack, after grouting is completed, the grout guide hopper 2 and the grout pressing disc 4 are directly taken out, simple operation, easy construction, quick repair and low cost.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The concrete crack repairing device is characterized by comprising a plurality of concrete prefabricated pipes (1) which are driven into a crack, wherein the concrete prefabricated pipes (1) are sequentially arranged along the extending direction of the crack, the concrete crack repairing device further comprises a plurality of slurry guide hoppers (2) which are arranged in the concrete prefabricated pipes (1) respectively, the outer walls of the slurry guide hoppers (2) are attached to the inner walls of the concrete prefabricated pipes (1), two slurry guide grooves (3) are symmetrically formed in the peripheral sides of the slurry guide hoppers (2) and the concrete prefabricated pipes (1), a plurality of slurry pressing discs (4) are connected into the slurry guide hoppers (2) together, and in the application process, the slurry pressing discs (4) are tightly attached to a concrete base surface and seal the opening of the crack.
2. The concrete crack repairing device according to claim 1, characterized in that a blocking edge (5) is fixed at the top edge of the slurry guide hopper (2) along the circumferential direction of the slurry guide hopper (2), and the blocking edge (5) is symmetrically provided with clamping grooves (6) for penetrating through the slurry pressing disc (4).
3. The concrete crack repairing device according to claim 2, characterized in that the two ends of the grouting disc (4) are fixed with abutting arc-shaped pieces (7) which abut against the inner wall of the blocking edge (5).
4. The concrete crack repairing device according to claim 3, characterized in that a plurality of grout outlet holes (8) are formed in the bottom wall of the grout pressing plate (4) at equal intervals, hole sealing plugs (9) are inserted into the grout outlet holes (8), and the hole sealing plugs (9) are integrally connected through a connecting strip (10).
5. The concrete crack repairing device according to claim 1, wherein the precast concrete pipe (1) and the slurry guide hopper (2) are arranged in a funnel shape.
6. The concrete crack repairing method is characterized by comprising the following steps:
s1: detecting the crack, namely injecting a detection agent containing metal powder into the crack along the trend of the crack, irradiating the inside of the crack by using an X-ray machine, and detecting and positioning the depth length of the crack by using a computer to obtain a crack image;
s2: marking drilling points, marking a plurality of crack holes with larger crack depths according to the crack conditions of a crack image map, obtaining drilling points 1, 2 and 2, and marking corresponding marks on the concrete base surface according to the corresponding drilling points of the crack influence map;
s3: drilling, namely drilling corresponding positions of the cracks according to the prepared marks, polishing base surfaces on two sides of the cracks to form a bucket-shaped hole extending along the depth direction of the cracks;
s4: cleaning the cracks, and after drilling is finished, washing the cracks and the bucket-shaped holes along the vertical direction;
s5: embedding pipes, namely sequentially embedding a plurality of prefabricated concrete pipes (1) prefabricated in advance into a plurality of hopper-shaped holes, communicating slurry guide grooves (3) of the prefabricated concrete pipes (1) with the inner wall of a crack, filling sealing slurry into a gap between the prefabricated concrete pipes (1) and the corresponding concrete structure base plane, and tightly plugging the gap;
s6: placing a slurry guide hopper (2) and a slurry pressing disc (4), sequentially placing a plurality of slurry guide hoppers (2) into different precast concrete pipes (1), rotating the slurry guide hoppers (2), and enabling slurry guide grooves (3) of the slurry guide hoppers (2) to be staggered with slurry guide grooves (3) of the precast concrete pipes (1), namely, sealing the slurry guide grooves (3) of the precast concrete pipes (1) by utilizing the peripheral walls of the slurry guide hoppers (2), and marking the 1 st slurry guide hopper (2), the 2 nd slurry guide hopper (2) and the 2 nd slurry guide hopper (2). then placing the slurry pressing discs (4) between adjacent slurry guide hoppers (2), and marking the 1 st slurry pressing disc (4), the 2 nd slurry pressing disc (4) and the 3 rd slurry pressing disc (4.);
s7: testing water, namely using 0.1-0.2 mpa pressure water for a water seepage test;
s8: the first grouting is carried out, the 1 st slurry guide hopper (2) is adjusted before grouting, the slurry guide groove (3) of the 1 st slurry guide hopper (2) is communicated with the slurry guide groove (3) of the corresponding concrete prefabricated pipe (1), the connecting strip (10) and the hole sealing plug (9) on the 1 st grouting disc (4) are uncovered, the grouting nozzle of a grouting machine is aligned to the 1 st slurry guide hopper (2) to carry out grouting in the grouting process, the pressure is kept at 0.2-0.6Mpa, the grouting condition of the grout outlet holes (8) of the 1 st grouting disc (4) is observed, when grout seeps out from each grout outlet hole (8), the grouting is stopped, the 1 st slurry guide hopper (2) is rotated to seal the slurry guide groove (3) of the corresponding concrete prefabricated pipe (1), the grout outlet holes (8) of the first grouting disc (4) are sealed by using the connecting strip (10) and the hole sealing plug (9), and the same step is carried out to carry out grouting on the 2 nd slurry guide hopper (2), the rest is done in the same way until the grouting of the Nth slurry guide hopper (2) is finished;
s9: secondary grouting, namely standing the grout for a period of time after the grouting is finished, sequentially taking out the grout guide hoppers (2) in the plurality of concrete prefabricated pipes (1) when the grout is in a semi-solidification state, taking out the grout pressing disc (4), and sequentially performing secondary grouting on the plurality of concrete prefabricated pipes (1);
s10: chiseling and trowelling, sealing the concrete prefabricated pipe (1), and then grinding and cleaning redundant concrete burrs.
7. The method for repairing a concrete crack according to claim 6, wherein in step S3, the ground surface of the concrete structure is shifted by 2-6cm from the crack to both sides.
8. The method of claim 6, wherein in step S3, the drilling axis is inclined at an angle of 30-45 degrees to the crack during drilling.
9. The concrete crack repairing method according to claim 6, wherein in step S5, the sealing slurry is an epoxy resin slurry.
10. The method for repairing a concrete crack according to claim 6, wherein in step S8, the grout for one grouting is cement paste with a water cement ratio of 1: 1.
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| CN113123633A (en) * | 2021-04-30 | 2021-07-16 | 台州远信建设工程有限公司 | Method for repairing concrete hollowing ground |
| CN114412219A (en) * | 2022-01-06 | 2022-04-29 | 中国华冶科工集团有限公司 | Defect repairing method for concrete at bottom of self-supporting box of hollow floor system |
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| CN113123633A (en) * | 2021-04-30 | 2021-07-16 | 台州远信建设工程有限公司 | Method for repairing concrete hollowing ground |
| CN114412219A (en) * | 2022-01-06 | 2022-04-29 | 中国华冶科工集团有限公司 | Defect repairing method for concrete at bottom of self-supporting box of hollow floor system |
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