CN114892736A - Underground building bottom plate crack injection grouting method - Google Patents
Underground building bottom plate crack injection grouting method Download PDFInfo
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- CN114892736A CN114892736A CN202210615453.XA CN202210615453A CN114892736A CN 114892736 A CN114892736 A CN 114892736A CN 202210615453 A CN202210615453 A CN 202210615453A CN 114892736 A CN114892736 A CN 114892736A
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- grouting
- cracks
- bottom plate
- nozzle
- injecting
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000002347 injection Methods 0.000 title description 2
- 239000007924 injection Substances 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000003829 resin cement Substances 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 230000036571 hydration Effects 0.000 claims description 3
- 238000006703 hydration reaction Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims description 2
- 230000002265 prevention Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 239000004814 polyurethane Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 239000011440 grout Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004588 polyurethane sealant Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/04—Watertight packings for use under hydraulic pressure
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a method for injecting and grouting cracks on a bottom plate of an underground building, which comprises the following steps: s1: analyzing cracks of the bottom plate, and determining the causes of the cracks; s2: cleaning cracks of the bottom plate, and removing concrete residues around the holes or other substances which obstruct construction to ensure that the positions needing construction are clean and wet; s3: and drilling the crack part. The invention adopts a chemical grouting method, slurry prepared by chemical materials is embedded into a grouting nozzle through a drill hole, and is injected into a crack of concrete by using pressure to diffuse and solidify the slurry, so that the aims of plugging and water prevention are achieved.
Description
Technical Field
The invention relates to a grouting method, in particular to a method for injecting a crack of a bottom plate of an underground building by a needle, and belongs to the technical field of underground buildings.
Background
The basement foundation slab leaks water for the reason is mostly after main body building is accomplished, because the uneven settlement and the displacement of foundation ground for the foundation slab produces the water leakage phenomenon, leads to the unable normal clear of construction, so must adopt quick effectual waterproof plugging measure, with the requirement that finally satisfies construction and people on next step and use.
Concrete building cracks are one of the main causes of damage to concrete buildings, water leakage caused by the cracks is difficult to solve, the surface leakage stoppage is generally carried out by chiseling the cracks or water seepage parts to carry out surface leakage stoppage, and as a result, the leakage starts to block the cracks and the water seepage parts, because the cracks are irregular in the concrete, the water can freely flow in the cracks and seep out from relatively weak parts.
Disclosure of Invention
The invention aims to provide a method for injecting and grouting cracks of a bottom plate of an underground building, which aims to solve the problem that the conventional plugging method proposed in the background art is to cut cracks or seepage parts to perform surface plugging, so that the cracks or the seepage parts are plugged, seepage begins again, and water can freely flow in the cracks because the cracks are irregular in the concrete and seep out from relatively weak parts.
In order to achieve the purpose, the invention provides the following technical scheme: the method comprises the following steps:
s1: analyzing cracks of the bottom plate, and determining the causes of the cracks;
s2: cleaning cracks of the bottom plate, and removing concrete residues around the holes or other substances which obstruct construction to ensure that the positions needing construction are clean and wet;
s3: drilling the crack part, and drilling along two sides of the crack;
s4: embedding a nozzle, namely placing the drilled hole with a grouting nozzle, screwing the grouting nozzle and fixing the grouting nozzle on the top of the hole, and ensuring that no gap exists between the grouting nozzle and the hole;
s5: grouting, namely grouting the PU grouting leak-stopping adhesive by using a high-pressure grouting technology;
s6: taking the nozzle, after grouting is finished, removing or knocking off the grouting nozzle after confirming that the nozzle is not leaked;
s7: and (5) plugging the gap opening, namely plugging the gap opening filled with the slurry.
As a preferred technical solution of the present invention, the analysis of the crack of the bottom plate specifically includes: the large-volume concrete of the basement bottom plate is poured at one time, the internal hydration heat of the concrete is large, the internal and external temperature difference is large, temperature difference cracks are formed, the concrete post-pouring zone is not well combined with the original poured concrete, cracks are easily generated at the combination position, and the foundation normally subsides and deforms to form partial cracks.
As a preferred embodiment of the present invention, the drilling in step S3 requires: the drill bit should be used with a diameter of 14mm, an angle of 20 degrees, a depth of 500mm, a penetration of the drill crack, and a spacing of 100mm between the holes.
As a preferred embodiment of the present invention, step S4 requires that: so that no gap and no water leakage exist between the periphery of the grouting nozzle and the drill hole:
in a preferred embodiment of the present invention, the grouting in step S5 is performed in a single hole sequence, and after the slurry starts to appear in adjacent holes, the grouting pressure on the grouting nozzle should be controlled at a level and maintained for 4 minutes.
As a preferred technical scheme of the invention, the method further comprises the following steps of performing seam washing treatment before grouting: specifically, clean water is injected into the grouting nozzle by a high-pressure cleaning machine at 6MPa pressure, the condition of a water outlet point is observed, and dust in the seam is cleaned.
As a preferred technical solution of the present invention, the step S6 is specifically that: and (4) screwing a valve on the grouting nozzle, confirming that the grouting nozzle does not discharge slurry, cleaning the overflowed slurry after the grouting nozzle is filled with the slurry, removing the solidified slurry, and pulling out the grouting nozzle.
As a preferred technical solution of the present invention, the plugging of the slit opening further includes a waterproofing treatment: coating a part subjected to chemical grouting with PU moist base surface sealant, wherein the width is 20cm, two ends of the part are respectively 20cm-30cm longer, drying and curing the layer, then respectively metering and mixing PU waterproof glue and water according to the proportion of A/B (mass ratio) of 1/2, uniformly stirring the layer by using an electric stirrer, coating 2-3 layers of the layer on the moist base surface sealant, wherein the area of the layer is the same, the thickness of the layer is about 1.5mm, the using amount of the layer is about 2.4kg/m2, after the completion of the plugging work, cleaning a construction site, observing, performing reinjection if the layer is omitted, observing for 7d, regarding the moisture resistance of resin cement on a moist surface caused by micro cracks, adding 0.5-1 part of cement into 1 part of resin, uniformly stirring and mixing, blade-coating or brush-coating on the moist surface, performing the second curing after the first curing, adding retarder or catalyst according to the environmental temperature, humidity and the like on site to adjust the curing speed in the construction, and water can be added to increase the bonding strength of the resin cement.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a method for injecting grout for cracks of a bottom plate of an underground building, which adopts a chemical grouting method, and is characterized in that grout prepared by chemical materials is embedded into a grouting nozzle through drilling holes, and is injected into cracks of concrete by using pressure so as to be diffused and solidified, thereby achieving the purposes of plugging and water prevention.
Drawings
FIG. 1 is a block flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme of a method for injecting and grouting cracks on a bottom plate of an underground building, which comprises the following steps: the method comprises the following steps:
s1: analyzing cracks of the bottom plate, and determining the causes of the cracks;
s2: cleaning cracks of the bottom plate, and removing concrete residues around the holes or other substances which obstruct construction to ensure that the positions needing construction are clean and wet;
s3: drilling a crack part, and drilling along two sides of the crack, wherein the diameter of a drill bit used is 14mm, the angle is 20 degrees, the depth is 500mm, the crack of the drill hole penetrates through the drill hole, and the space between holes is 100 mm;
s4: embedding a nozzle, namely placing the drilled hole with a grouting nozzle, screwing the grouting nozzle tightly and fixing the grouting nozzle at the top of the hole, and ensuring that no gap exists between the grouting nozzle and the hole and no water leakage exists;
s5: grouting, namely grouting the PU grouting leak-stopping adhesive by using a high-pressure grouting technology;
s6: taking a nozzle, after grouting is finished, removing or knocking off the grouting nozzle after confirming that the grouting nozzle is not leaked, screwing a valve on the grouting nozzle, confirming that the grouting nozzle does not discharge slurry, cleaning the slurry which is fully filled with the overflowed slurry, removing the solidified slurry, and pulling out the grouting nozzle;
s7: and (5) plugging the gap opening, namely plugging the gap opening filled with the slurry.
The invention adopts a chemical grouting method, slurry prepared by chemical materials is embedded into a grouting nozzle through a drill hole, and is injected into a crack of concrete by using pressure to diffuse and solidify the slurry, so that the aims of plugging and water prevention are achieved.
The crack analysis of the bottom plate specifically comprises the following steps: the large-volume concrete of the basement bottom plate is poured at one time, the hydration heat in the concrete is large, the temperature difference between the inside and the outside is large, temperature difference cracks are formed, the concrete post-pouring belt is not well combined with the original poured concrete, cracks are easily generated at the combined part, and the foundation is normally settled and deformed to form partial cracks.
The grouting in step S5 is performed in a single hole sequence, and after the slurry starts to appear in the adjacent holes, the grouting pressure on the grouting nozzle should be controlled at a level and maintained for 4 minutes.
And (3) before grouting, seam washing treatment is further included: specifically, clean water is injected into the grouting nozzle by a high-pressure cleaning machine at 6MPa pressure, the condition of a water outlet point is observed, and dust in the seam is cleaned.
The gap plugging also comprises waterproof treatment: coating the part subjected to chemical grouting with PU moist base surface sealant, wherein the width is 20cm, two ends of the part are respectively extended by 20cm-30cm, drying and curing the layer, then respectively metering and mixing PU waterproof glue and water according to the proportion of A/B (mass ratio) of 1/2, uniformly stirring the layer by using an electric stirrer, coating 2-3 layers of the layer on the moist base surface sealant, wherein the area of the layer is the same, the thickness of the layer is about 1.5mm, and the using amount of the layer is about 2.4kg/m2, cleaning a construction site after completing the plugging work, observing, if omitting, performing reinjection, observing for 7d, regarding the moisture prevention of resin cement for a moist surface caused by micro cracks, adding 0.5-1 part of cement into 1 part of resin, uniformly stirring and mixing, blade-coating or brush-coating on the moist surface, performing the second curing after the first curing, adding retarder or catalyst to adjust the curing speed according to the temperature, humidity and the like of the site in the construction, the method can also add partial water to increase the bonding strength of resin cement or paint polyurethane sealant, firstly, the powder is stirred in a mixing barrel, the uniformity is ensured in the stirring process, the construction on blade coating in the construction process is ensured to be uniform, the situation that some places are thinner and some places are thicker can not be caused, secondary construction is required in the construction process, and the secondary construction is carried out after the initial setting of primary construction.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A method for injecting and grouting cracks of a bottom plate of an underground building is characterized by comprising the following steps:
s1: analyzing cracks of the bottom plate, and determining the causes of the cracks;
s2: cleaning cracks of the bottom plate, and removing concrete residues around the holes or other substances which obstruct construction to ensure that the positions needing construction are clean and wet;
s3: drilling the crack part, and drilling along two sides of the crack;
s4: embedding a nozzle, namely placing the drilled hole with a grouting nozzle, screwing the grouting nozzle and fixing the grouting nozzle on the top of the hole, and ensuring that no gap exists between the grouting nozzle and the hole;
s5: grouting, namely grouting the PU grouting leak-stopping adhesive by using a high-pressure grouting technology;
s6: taking the nozzle, after grouting is finished, removing or knocking off the grouting nozzle after confirming that the nozzle is not leaked;
s7: and (5) plugging the gap opening, namely plugging the gap opening filled with the slurry.
2. The method for injecting the cracks of the underground building bottom plate into the needle according to the claim 1, is characterized in that: the analysis of the cracks of the bottom plate specifically comprises the following steps: the large-volume concrete of the basement bottom plate is poured at one time, the internal hydration heat of the concrete is large, the internal and external temperature difference is large, temperature difference cracks are formed, the concrete post-pouring zone is not well combined with the original poured concrete, cracks are easily generated at the combination position, and the foundation normally subsides and deforms to form partial cracks.
3. The method for injecting the cracks of the underground building bottom plate into the needle according to the claim 1, is characterized in that: the drilling in the step S3 requires: the drill bit should be used with a diameter of 14mm, an angle of 20 degrees, a depth of 500mm, a penetration of the drill crack, and a spacing of 100mm between the holes.
4. The method for injecting the cracks of the underground building bottom plate into the needle according to the claim 1, is characterized in that: step S4 requires for mouth burying: so that no gap and no water leakage exist between the periphery of the grouting nozzle and the drill hole.
5. The method for injecting the cracks of the underground building bottom plate into the needle according to the claim 1, is characterized in that: the grouting in step S5 is performed in a single hole sequence, and after the slurry starts to appear in the adjacent holes, the grouting pressure on the grouting nozzle should be controlled at a level and maintained for 4 minutes.
6. The method for injecting the cracks of the underground building bottom plate into the needle according to the claim 1, is characterized in that: the method further comprises the following steps of seam cleaning treatment before grouting: specifically, clean water is injected into the grouting nozzle by a high-pressure cleaning machine at 6MPa pressure, the condition of a water outlet point is observed, and dust in the seam is cleaned.
7. The method for injecting the cracks of the underground building bottom plate into the needle according to the claim 1, is characterized in that: the step S6 is specifically as follows: and (4) screwing a valve on the grouting nozzle, confirming that the grouting nozzle does not discharge slurry, cleaning the overflowed slurry after the grouting nozzle is filled with the slurry, removing the solidified slurry, and pulling out the grouting nozzle.
8. The method for injecting the cracks of the underground building bottom plate into the needle according to the claim 1, is characterized in that: the gap plugging further comprises waterproof treatment: coating a part subjected to chemical grouting with PU moist base surface sealant, wherein the width is 20cm, two ends of the part are respectively 20cm-30cm longer, drying and curing the layer, then respectively metering and mixing PU waterproof glue and water according to the proportion of A/B (mass ratio) of 1/2, uniformly stirring the layer by using an electric stirrer, coating 2-3 layers of the layer on the moist base surface sealant, wherein the area of the layer is the same, the thickness of the layer is about 1.5mm, the using amount of the layer is about 2.4kg/m2, after the completion of the plugging work, cleaning a construction site, observing, performing reinjection if the layer is omitted, observing for 7d, regarding the moisture resistance of resin cement on a moist surface caused by micro cracks, adding 0.5-1 part of cement into 1 part of resin, uniformly stirring and mixing, blade-coating or brush-coating on the moist surface, performing the second curing after the first curing, adding retarder or catalyst according to the environmental temperature, humidity and the like on site to adjust the curing speed in the construction, and water can be added to increase the bonding strength of the resin cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210615453.XA CN114892736A (en) | 2022-05-31 | 2022-05-31 | Underground building bottom plate crack injection grouting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210615453.XA CN114892736A (en) | 2022-05-31 | 2022-05-31 | Underground building bottom plate crack injection grouting method |
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| CN114892736A true CN114892736A (en) | 2022-08-12 |
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| CN202210615453.XA Pending CN114892736A (en) | 2022-05-31 | 2022-05-31 | Underground building bottom plate crack injection grouting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115434356A (en) * | 2022-08-30 | 2022-12-06 | 中国电建集团四川工程有限公司 | Construction process for secondary grouting of fan foundation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109098213A (en) * | 2018-08-29 | 2018-12-28 | 中国建筑第四工程局有限公司 | A kind of basement blocking method |
| CN113323440A (en) * | 2021-06-10 | 2021-08-31 | 上海凯顿百森建筑工程有限公司 | Concrete gap repairing and anti-seepage treatment method |
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2022
- 2022-05-31 CN CN202210615453.XA patent/CN114892736A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109098213A (en) * | 2018-08-29 | 2018-12-28 | 中国建筑第四工程局有限公司 | A kind of basement blocking method |
| CN113323440A (en) * | 2021-06-10 | 2021-08-31 | 上海凯顿百森建筑工程有限公司 | Concrete gap repairing and anti-seepage treatment method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115434356A (en) * | 2022-08-30 | 2022-12-06 | 中国电建集团四川工程有限公司 | Construction process for secondary grouting of fan foundation |
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