CN102493494A - Method for sealing vertical cracks of basement concrete structures by using microbial grouting - Google Patents
Method for sealing vertical cracks of basement concrete structures by using microbial grouting Download PDFInfo
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- CN102493494A CN102493494A CN2011104131889A CN201110413188A CN102493494A CN 102493494 A CN102493494 A CN 102493494A CN 2011104131889 A CN2011104131889 A CN 2011104131889A CN 201110413188 A CN201110413188 A CN 201110413188A CN 102493494 A CN102493494 A CN 102493494A
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Abstract
The invention discloses a method for sealing vertical cracks of basement concrete structures by using microbial grouting, which seals the cracks by using a method of grouting into cracks on the inner sides of walls. In particular, the method comprises the steps of punching holes, cleaning the holes, sealing the surfaces of the cracks, preparing bacterium fluid and nutritive salt solution, grouting the bacterium fluid, grouting the nutritive salt solution, and sealing and plugging grouting holes. The bacterium fluid can induce calcium chloride to generate calcium carbonate sedimentary to effectively fill, seal and plug the cracks and the grouting holes. Water injection tests and observation after raining show that the original cracks are obviously reduced in water seepage.
Description
Technical field
The present invention relates to the shutoff and the restorative procedure of distress in concrete in a kind of civil engineering, the method in the vertical crack of especially a kind of microorganism grout sealing Basement Concrete Structures.
Background technology
According in recent years national basement in high rise building investigation being found that the cracking quantity of basement in high rise building exterior wall accounts for by about 85% of investigation engineering sum, the phenomenon that the crack appears in base plate accounts for by about 10% of investigation sum.Simultaneously analysis of survey results is found that in the various negative consequences that caused by the crack, seepage accounts for 60%.Therefore, the Crack Control problem of concrete structure just becomes one of important research project in the construction work.Particularly over the past two decades, after the pumping commercial concrete obtained extensive use, the problem that the crack produces was outstanding day by day.
The blocking method of existing basement has a lot, but effect is all undesirable.Reason has two aspects: after (1) basement built up, wall outside backfill was difficult in exterior wall and repairs; (2) mostly existing patching material is the material of organic or hydrophobic, and problem of aging is arranged, and the coefficient of expansion and concrete are inconsistent.Therefore, leakage problems becomes old, big, the difficult problem of puzzlement engineering circle.Repairing method of microorganism is a kind of method of novel repairing concrete crack, and product is consistent with former concrete, should not ftracture after the reparation.Grouting agent is liquid, is easy to infiltrate in the seam, in seam, forms deposition.The durability and the intensity of the concrete material after the reparation all are greatly increased, and good with the associativity of concrete material.
Utilizing microorganism diagenesis recovery technique is a kind of international advanced technology of subject crossing.Its mechanism is to utilize microorganism induction to generate mineral deposition to fill up and the rehabilitating concrete defective: some basophilous edaphon utilizes the urease that self produces that hydrolysis of urea is ammonia and carbon dioxide; The increase of decomposing the ammonia quantity that generates can cause the rising of pH value on every side, thereby causes the deposition of calcium carbonate.In inducing the process of tosca, action of microorganisms is not only the generation urease, but also for the deposition of calcium carbonate the place of nucleation is provided.In civil engineering, the microorganism recovery technique mainly is to utilize cultured microorganism to induce tosca rehabilitating concrete defective, and shutoff and ground processing etc. are carried out in the crack at present.The application of the Cheng Xiao of Tsing-Hua University brightness patent " a kind of microorganism cause cement or concrete and production method and application " (CN200810105947.3); Propose to utilize Pasteur bacillus bacterium liquid that can produce urase and the fluid,matching that contains urea and mineral calcium salt to mix; Reaction under certain condition get final product microorganism cause cement or concrete method, but do not provide especially the method that specifically mends a split about basement.
One Chinese patent application 200810019165.8 discloses a kind of microorganism reparation cement-based material crack method and nutrient solution and reparation nutrient solution of utilizing.It adopts microbial inoculum and reparation nutrient solution is injected cement stony fracture seam, carries out maintenance.But this method and useless relating to bacterium liquid and concrete grammar, the step of repairing in the nutrient solution injection crack.
Summary of the invention
The objective of the invention is provides the method in the vertical crack of a kind of microorganism grout sealing Basement Concrete Structures for overcoming the deficiency of above-mentioned prior art, and this method is easy to operate, and crack closure is effective, is easy to construction.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
The method in the vertical crack of a kind of microorganism grout sealing Basement Concrete Structures; The outside of outer wall of basement is waterproofing course and fill stratum, if vertical crack appears in concrete exterior wall, is difficult in the wall outer side excavation and bankets; Expose the crack; Again shutoff is carried out in the crack, adopted the method dead-end fracture that is in the milk in the latasuture in the body of wall, step is following:
(1) punching
In the vertical crack, because the trickling downwards under the deadweight effect of microbial inoculum and nutritive salt liquid, and the crack is thinner, and directly perfusion fluid is difficult to get into the depths, crack, therefore, adopts the vertical fill orifice that is provided with at interval along the crack;
(2) clear hole
Fill orifice inner concrete residue is removed clean;
(3) fracture faces sealing
Parcel one deck absorbent cotton on the surface in crack, and then wrap up two-layer gauze, with adhesive plaster absorbent cotton and gauze are fixed again; Clear water can ooze out from absorbent cotton and gauze, but the bacterium particle diameter is bigger, and the meeting block is in the crack;
(4) bacterium liquid and nutrient salt solution preparation
Prepare 3-5 with fermentation tank and rise the Pasteur bacillus, enzymatic activity OD600 is greater than 1; Preparation contains the calcium chloride of 1mol/L and the nutrient salt solution of 1mol/L urea;
(5) perfusion bacterium liquid
In the crack, pour into bacterium liquid from the fill orifice of below, treat that bacterium liquid penetrates into behind the crack and when fill orifice overflows, change to fill orifice continuation and pour into bacterium liquid, in all fill orifices, fill;
(6) perfusion nutrient salt solution
The bacterium liquid liquid level of waiting for fill orifice descends, and after the bacterium liquid of volume more than 80% infiltrates the crack, in fill orifice, injects the calcium chloride that contains 1mol/L of twice bacteria liquid amount and the nutrient salt solution of 1mol/L urea respectively;
(7) continued perfusion bacterium liquid in follow-up 4 days
Pour into one time bacterium liquid follow-up 4 day every day, method for filling is with (5) step;
(8) continued the perfusion nutrient salt solution in follow-up 9 days
Pour into the one time of nutrition salting liquid follow-up 9 day every day, method for filling is with (6) step;
(9) shutoff of fill orifice
Once fill coarse sand in the fill orifice, perfusion bacterium liquid 5 days and nutrient salt solution 10 days, repeating step (5) is to step (8); The tosca thing that bacterium liquid induces calcium chloride to generate can be filled crack and fill orifice and shutoff effectively.
Fill orifice is tilted to down in the said step (1), is convenient to liquid and infiltrates, and the hole depth of fill orifice is the 1/2-3/4 of wall thickness, the vertical spacing 300-500mm in hole.
Adopt compressed air that fill orifice inner concrete residue is blown off in the said step (2); In fill orifice, inject clear water again, fill orifice is cleaned.
The invention has the beneficial effects as follows effectively shutoff crack, through water injection test with rain after observation, the water percolating capacity in former crack obviously reduces.Utilize non-metal ultrasonic detector that seam is striden in the crack and survey (Fig. 3, when 5 points in Fig. 4 centre joint both sides are ultrasonic listening couplant); Reduce to about 40 microseconds by 70～80 microseconds in the time of hyperacoustic and (see table 1); Explain closely knit product has been arranged in the crack; Therefore ultrasonic wave can pass from product, and needn't walk around the crack, reduces during sound.
During table 1 hyperacoustic
Description of drawings
Fig. 1 is the present invention's sketch map when implementing;
Fig. 2-Fig. 5 is the photo of on-the-spot shutoff test; Wherein, Fig. 2 is the punch out step photo, and Fig. 3 is a fracture faces sealing photo, and Fig. 4 is perfusion bacterium liquid and nutrient solution photo; Fig. 5 is the calcium carbonate product photo in the fill orifice;
1. concrete of basement exterior walls wherein, 2. vertical crack, 3. fill stratum, 4. fill orifice, 5. absorbent cotton and gauze.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
The method in the vertical crack of a kind of microorganism grout sealing Basement Concrete Structures, like Fig. 1-shown in Figure 5, the outside of concrete of basement exterior wall 1 is waterproofing course and fill stratum 3; If vertical crack 2 appears in concrete of basement exterior wall 1; Be difficult in the wall outer side excavation and banket, expose vertical crack 2, again shutoff is carried out in the crack; Adopt the method dead-end fracture that is in the milk in the latasuture in the body of wall, step is following:
(1) punching
In the vertical crack, because the trickling downwards under the deadweight effect of microbial inoculum and nutritive salt liquid, and the crack is thinner, and directly perfusion fluid is difficult to get into the depths, crack, therefore, adopts the vertical fill orifice 4 that is provided with at interval along the crack; Fill orifice 4 is tilted to down, is convenient to liquid and infiltrates, and the hole depth of fill orifice 4 is the 1/2-3/4 of wall thickness, the vertical spacing 300-500mm in hole;
(2) clear hole
Adopt compressed air that fill orifice 4 inner concrete residues are blown off; In fill orifice 4, inject clear water again, fill orifice 4 is cleaned.
(3) fracture faces sealing
Parcel one deck absorbent cotton on the surface in crack, and then wrap up two-layer gauze, with adhesive plaster that absorbent cotton and gauze 5 is fixing again; Clear water can ooze out from absorbent cotton and gauze 5, but the bacterium particle diameter is bigger, and the meeting block is in the crack;
(4) bacterium liquid and nutrient salt solution preparation
Prepare 3-5 with fermentation tank and rise the Pasteur bacillus, enzymatic activity OD600 is greater than 1; Preparation contains the calcium chloride of 1mol/L and the nutrient salt solution of 1mol/L urea;
(5) perfusion bacterium liquid
In the crack, pour into bacterium liquid from the fill orifice 4 of below, treat that bacterium liquid penetrates into behind the crack and when fill orifice overflows, change to a fill orifice 4 continuation and pour into the bacterium liquid, in all fill orifices 4, fill;
(6) perfusion nutrient salt solution
The bacterium liquid liquid level of waiting for fill orifice 4 descends, and the bacterium liquid more than 80% injects the calcium chloride that contains 1mol/L of twice bacteria liquid amount and the nutrient salt solution of 1mol/L urea respectively after infiltrating the crack in fill orifice 4;
(7) continued perfusion bacterium liquid in follow-up 4 days
Pour into one time bacterium liquid follow-up 4 day every day, method for filling is with (5) step;
(8) continued the perfusion nutrient salt solution in follow-up 9 days
Pour into the one time of nutrition salting liquid follow-up 9 day every day, method for filling is with (6) step;
(9) shutoff of fill orifice
Once fill coarse sand in the fill orifice 4, perfusion bacterium liquid 5 days and nutrient salt solution 10 days, repeating step (5) is to step (8); The tosca thing that bacterium liquid induces calcium chloride to generate can be filled crack and fill orifice and shutoff effectively.
Though the above-mentioned accompanying drawing specific embodiments of the invention that combines is described; But be not restriction to protection domain of the present invention; One of ordinary skill in the art should be understood that; On the basis of technical scheme of the present invention, those skilled in the art need not pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (3)
1. the method in the vertical crack of microorganism grout sealing Basement Concrete Structures, the outside of outer wall of basement is waterproofing course and fill stratum, if vertical crack appears in concrete exterior wall; Being difficult in the wall outer side excavation bankets; Expose the crack, again shutoff is carried out in the crack, it is characterized in that; Adopt the method dead-end fracture that is in the milk in the latasuture in the body of wall, step is following:
(1) punching
In the vertical crack, because the trickling downwards under the deadweight effect of microbial inoculum and nutritive salt liquid, and the crack is thinner, and directly perfusion fluid is difficult to get into the depths, crack, therefore, adopts the vertical fill orifice that is provided with at interval along the crack;
(2) clear hole
Fill orifice inner concrete residue is removed clean;
(3) fracture faces sealing
Parcel one deck absorbent cotton on the surface in crack, and then wrap up two-layer gauze, with adhesive plaster absorbent cotton and gauze are fixed again; Clear water can ooze out from absorbent cotton and gauze, but the bacterium particle diameter is bigger, and the meeting block is in the crack;
(4) bacterium liquid and nutrient salt solution preparation
Prepare 3-5 with fermentation tank and rise the Pasteur bacillus, enzymatic activity OD600 is greater than 1; Preparation contains the calcium chloride of 1mol/L and the nutrient salt solution of 1mol/L urea;
(5) perfusion bacterium liquid
In the crack, pour into bacterium liquid from the fill orifice of below, treat that bacterium liquid penetrates into behind the crack and when fill orifice overflows, change to fill orifice continuation and pour into bacterium liquid, in all fill orifices, fill;
(6) perfusion nutrient salt solution
The bacterium liquid liquid level of waiting for fill orifice descends, and the bacterium liquid more than 80% injects the calcium chloride that contains 1mol/L of twice bacteria liquid amount and the nutrient salt solution of 1mol/L urea respectively after infiltrating the crack in fill orifice;
(7) continued perfusion bacterium liquid in follow-up 4 days
Pour into one time bacterium liquid follow-up 4 day every day, method for filling is with (5) step;
(8) continued the perfusion nutrient salt solution in follow-up 9 days
Pour into the one time of nutrition salting liquid follow-up 9 day every day, method for filling is with (6) step;
(9) shutoff of fill orifice
Once fill coarse sand in the fill orifice, perfusion bacterium liquid 5 days and nutrient salt solution 10 days, repeating step (5) is to step (8); The tosca thing that bacterium liquid induces calcium chloride to generate can be filled crack and fill orifice and shutoff effectively.
2. the method for claim 1 is characterized in that, fill orifice is tilted to down in the said step (1), is convenient to liquid and infiltrates, and the hole depth of fill orifice is the 1/2-3/4 of wall thickness, the vertical spacing 300-500mm in hole.
3. the method for claim 1 is characterized in that, adopts compressed air that fill orifice inner concrete residue is blown off in the said step (2); In fill orifice, inject clear water again, fill orifice is cleaned.
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| CN104196131A (en) * | 2014-09-11 | 2014-12-10 | 山东建筑大学 | Method for plugging cast-in-situ concrete slab or base-plate crack with microbe-sedimented calcium carbonate |
| CN104234090A (en) * | 2014-09-04 | 2014-12-24 | 江苏南通三建集团有限公司 | Method for treating crack water seepage of concrete floor and wall body |
| CN104818719A (en) * | 2015-03-16 | 2015-08-05 | 山东建筑大学 | Microorganism grouting method capable of improving early-stage calcium carbonate deposit volume |
| CN105019480A (en) * | 2015-06-05 | 2015-11-04 | 湖南省第五工程有限公司 | Construction treatment method for building cracks |
| CN106223962A (en) * | 2016-08-18 | 2016-12-14 | 东南大学 | Microorganism grouting method after a kind of Shield Tunnel in Soft Soil lining segment wall |
| CN104234090B (en) * | 2014-09-04 | 2017-01-04 | 江苏南通三建集团有限公司 | A kind of administer concrete floor, wall body slit infiltration method |
| CN106285723A (en) * | 2016-08-30 | 2017-01-04 | 东南大学 | Microorganism grouting device and method after a kind of shield tunnel liner wall |
| CN109778834A (en) * | 2019-01-09 | 2019-05-21 | 南京大学 | A method of utilizing microbial control soil body dry shrinkage and cracking |
| CN109838113A (en) * | 2019-03-04 | 2019-06-04 | 山东建筑大学 | Microorganism induction generates the method that calcium carbonate blocks Basement Crack |
| CN110863517A (en) * | 2019-12-12 | 2020-03-06 | 昆明理工大学 | Method for sealing and blocking leakage of storage yard by utilizing microbial induction |
| CN110907328A (en) * | 2019-11-29 | 2020-03-24 | 中国海洋石油集团有限公司 | Experimental device and method for plugging and seepage-proofing rock fractures based on MICP technology |
| CN111877564A (en) * | 2020-08-07 | 2020-11-03 | 山东建筑大学 | Microbial grouting anchoring method and structure of external grouting pipe |
| CN112198025A (en) * | 2020-09-29 | 2021-01-08 | 中国海洋大学 | Test method for plugging rock cracks based on microbial grouting technology |
| CN113216682A (en) * | 2021-05-20 | 2021-08-06 | 江苏大学 | Method for repairing vertical surface cracks in situ by using calcium carbonate precipitation induced by microorganisms |
| CN113307656A (en) * | 2021-05-29 | 2021-08-27 | 兰州理工大学 | Method for repairing concrete cracks by using microorganisms |
| CN114875942A (en) * | 2022-06-21 | 2022-08-09 | 中国煤炭地质总局勘查研究总院 | Waterproof curtain gap plugging device and technology based on microbial mineralization |
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| CN104234090A (en) * | 2014-09-04 | 2014-12-24 | 江苏南通三建集团有限公司 | Method for treating crack water seepage of concrete floor and wall body |
| CN104234090B (en) * | 2014-09-04 | 2017-01-04 | 江苏南通三建集团有限公司 | A kind of administer concrete floor, wall body slit infiltration method |
| CN104196131A (en) * | 2014-09-11 | 2014-12-10 | 山东建筑大学 | Method for plugging cast-in-situ concrete slab or base-plate crack with microbe-sedimented calcium carbonate |
| CN104818719A (en) * | 2015-03-16 | 2015-08-05 | 山东建筑大学 | Microorganism grouting method capable of improving early-stage calcium carbonate deposit volume |
| CN105019480A (en) * | 2015-06-05 | 2015-11-04 | 湖南省第五工程有限公司 | Construction treatment method for building cracks |
| CN106223962A (en) * | 2016-08-18 | 2016-12-14 | 东南大学 | Microorganism grouting method after a kind of Shield Tunnel in Soft Soil lining segment wall |
| CN106223962B (en) * | 2016-08-18 | 2018-10-23 | 东南大学 | Microorganism grouting method after a kind of Shield Tunnel in Soft Soil lining segment wall |
| CN106285723A (en) * | 2016-08-30 | 2017-01-04 | 东南大学 | Microorganism grouting device and method after a kind of shield tunnel liner wall |
| CN106285723B (en) * | 2016-08-30 | 2018-05-08 | 东南大学 | Microorganism grouting device and method after a kind of shield tunnel liner wall |
| CN109778834B (en) * | 2019-01-09 | 2021-03-30 | 南京大学 | Method for preventing soil body from drying shrinkage cracking by using microorganisms |
| CN109778834A (en) * | 2019-01-09 | 2019-05-21 | 南京大学 | A method of utilizing microbial control soil body dry shrinkage and cracking |
| CN109838113A (en) * | 2019-03-04 | 2019-06-04 | 山东建筑大学 | Microorganism induction generates the method that calcium carbonate blocks Basement Crack |
| CN110907328A (en) * | 2019-11-29 | 2020-03-24 | 中国海洋石油集团有限公司 | Experimental device and method for plugging and seepage-proofing rock fractures based on MICP technology |
| CN110863517A (en) * | 2019-12-12 | 2020-03-06 | 昆明理工大学 | Method for sealing and blocking leakage of storage yard by utilizing microbial induction |
| CN111877564A (en) * | 2020-08-07 | 2020-11-03 | 山东建筑大学 | Microbial grouting anchoring method and structure of external grouting pipe |
| CN112198025A (en) * | 2020-09-29 | 2021-01-08 | 中国海洋大学 | Test method for plugging rock cracks based on microbial grouting technology |
| CN112198025B (en) * | 2020-09-29 | 2021-12-31 | 中国海洋大学 | Test method for plugging rock cracks based on microbial grouting technology |
| CN113216682A (en) * | 2021-05-20 | 2021-08-06 | 江苏大学 | Method for repairing vertical surface cracks in situ by using calcium carbonate precipitation induced by microorganisms |
| CN113307656A (en) * | 2021-05-29 | 2021-08-27 | 兰州理工大学 | Method for repairing concrete cracks by using microorganisms |
| CN114875942A (en) * | 2022-06-21 | 2022-08-09 | 中国煤炭地质总局勘查研究总院 | Waterproof curtain gap plugging device and technology based on microbial mineralization |
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