CN111809669A - Basement post-cast strip leaking stoppage grouting and reinforcing construction method - Google Patents
Basement post-cast strip leaking stoppage grouting and reinforcing construction method Download PDFInfo
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- CN111809669A CN111809669A CN202010705313.2A CN202010705313A CN111809669A CN 111809669 A CN111809669 A CN 111809669A CN 202010705313 A CN202010705313 A CN 202010705313A CN 111809669 A CN111809669 A CN 111809669A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
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Abstract
The invention discloses a basement post-cast strip leaking stoppage grouting and reinforcing construction method, which comprises the following process flows in sequence: cleaning a base layer → checking a grouting part → arranging a hole → drilling a hole → cleaning the hole, protecting the hole → arranging a nozzle → arranging grouting material → grouting, repeatedly checking the grouting → consolidating → dismantling the nozzle; the problem that water seepage or water burst is caused due to the fact that water pressure damages concrete of a post-cast strip of a basement after the water level of the post-cast strip is improved is solved, original loose soil particles or cracks are glued into a whole through grout, a 'stone body' which is novel in structure, high in strength, high in waterproof performance and good in chemical stability is formed, the water impermeability and the bearing capacity of a foundation are improved, reinforced concrete at the position of the post-cast strip is guaranteed not to be impacted by the water pressure, the fact that the ground is free of water is observed, and the fact that the water does not seep is completely achieved.
Description
Technical Field
The invention relates to the technical field of basement post-cast strip water-proofing and leakage-stopping and underground building reinforcement, in particular to a basement post-cast strip leakage-stopping grouting and reinforcing construction method.
Background
The prior art is directed against basement post-cast strip behind the water level improvement, and water pressure causes the destruction to post-cast strip concrete, produces the percolating water or gushes water problem, adopts the injection slip casting processing technology to post-cast strip usually, but prior art exists following problem:
1. the water-seepage-resistant sealing agent can be used when water seepage is small, and is difficult to block when water gushes seriously, so that construction is difficult.
2. The water seepage cannot be solved from the root, and only the cracks are blocked.
3. Because of the difference of plugging materials, the lasting effect time can not be ensured after plugging.
Disclosure of Invention
The invention aims to provide a basement post-cast strip leaking stoppage grouting and reinforcing construction method, which can improve the water impermeability and the bearing capacity of a foundation, ensure that reinforced concrete at the post-cast strip position is not impacted by water pressure, observe that the ground is anhydrous and completely realize no seepage.
The invention is realized by the following technical scheme: the basement post-cast strip leaking stoppage grouting and reinforcing construction method comprises the following specific steps:
1) cleaning a base layer: professional constructors clean impurities on the surface of the base layer;
2) checking the grouting part: checking a construction drawing according to the site position, and analyzing a specific grouting part;
3) hole distribution: analyzing geology, and arranging grouting hole sites from one end of the post-cast strip to the other end according to conditions, wherein the distance between the grouting hole sites from the center line of the post-cast strip to the left side and the right side is about 1-1.5m, and the distance between the grouting hole sites along the length of the post-cast strip is about 1-1.5m, and is determined according to the field conditions;
4) drilling: after hole arrangement is finished, a constructor uses a concrete drilling core-taking machine (the constructor can operate the equipment more safely) according to the hole arrangement position, the depth of the concrete drilling core-taking machine is 1-1.2 m (determined according to actual conditions) when the concrete drilling core-taking machine enters a soil body, and the center of each hole is perpendicular to a grouting hole of a water-resistant bottom plate (also used as a raft plate);
5) cleaning and protecting the holes: after drilling is finished, cleaning up dregs in the grouting hole, and then adopting a protective measure to protect the grouting hole, and strictly preventing sundries from entering the hole;
6) distributing a nozzle: a grouting pipe (a small grouting hole is arranged on the pipe, and a valve controllable switch is arranged on the pipe) is arranged in the drilled grouting hole, so that no gap exists between the periphery of the grouting pipe and the grouting hole, water leakage does not occur, and looseness during high-pressure grouting is avoided;
7) preparing slurry: preparing grouting liquid, and mixing cement and water according to the proportion of the grouting liquid, wherein the proportion of cement and water is 0.8-1.2: stirring for 20-25 minutes at a ratio of 0.8-1.2, and simultaneously mixing water and a multifunctional high-strength water-based grouting agent (mainly comprising water glass, sodium aluminate, modified water-based epoxy resin, barium acrylate, a curing agent and other materials) according to a ratio of 48-53: stirring for 5-10 minutes at a ratio of 0.9-1.3;
8) grouting: after pressure testing, under the condition that the structure pressure range is not exceeded, grouting liquid ('water + cement' and 'water + multifunctional high-strength water-based grouting agent') is poured into the grouting holes, when the grouting liquid is poured, the grouting liquid is gradually poured from one side of a post-cast strip to the other side, the pouring pressure is 0.5-1.6MPa, multiple supplementary grouting modes are adopted to enable the grouting liquid to be tightly combined with earth and stones, grouting is stopped after the grouting pressure changes smoothly, a valve on a grouting pipe is closed, and the adjacent grouting holes are changed;
9) consolidation: waiting for the slurry to solidify;
10) removing the nozzle: and after grouting is finished, observing for a period of time (preferably 24-30 h), confirming that the grouting pipe has a plugging effect (does not leak water), and cutting off the redundant grouting pipe exceeding the ground.
In order to further realize the invention, the following arrangement mode is adopted: the pipe wall of grout pipe is provided with little grout hole, and still is provided with the valve on the grout pipe, and the valve is as the switch of control grout break-make in the grout pipe.
In order to further realize the invention, the following arrangement mode is adopted: the multifunctional high-strength water-based grouting agent is prepared from the following components in parts by mass of 0.8-1.2: 0.2-0.8: 0.04-0.06: 0.03 to 0.08: 0.03-0.05 of water glass, sodium aluminate, modified waterborne epoxy resin, barium acrylate, a curing agent and the like.
In order to further realize the invention, the following arrangement mode is adopted: in the step 8), a hydraulic double-liquid grouting pump is adopted during pressure testing, and the pressure testing is carried out within a structure pressure-bearing range; when the perfusion is carried out, the perfusion pressure is 0.5-1.6 MPa.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention solves the problem that the water pressure damages the concrete of the post-cast strip of the basement after the water level is increased, and the water seepage or water inrush is generated, through the principles of hydraulic pressure, air pressure and dynamics, the grout is uniformly injected into the soil layer through the grouting pipe, the grout drives away the water and air in the soil particles or rock cracks in the modes of filling, permeation, compaction and the like, occupies the position of the post-cast strip, after a certain time of manual control, the original loose soil particles or cracks are cemented into a whole by the grout, and a 'stone body' with a new structure, high strength, high waterproof performance and good chemical stability is formed, so that the water impermeability and bearing capacity of the foundation are improved, the reinforced concrete at the post-cast strip part is ensured not to be impacted by the water pressure, the water absence on the ground is observed, and the water leakage is completely avoided.
(2) The invention adopts a low-pressure, slow-filling, fast-curing and clearance control grouting method to enhance the monitoring and detection of the structure during grouting and prevent the lifting of the bottom plate of the structure caused by grouting.
(3) The invention relates to a grouting method through series control: the grouting material has the advantages that low pressure, slow grouting, rapid curing and multiple times of intermittent grouting are carried out, the grouting fullness can also play the roles of repairing the damage of the drilling hole to the waterproof layer and the original damaged waterproof layer, the material after grouting and curing is equivalent to the fact that the waterproof layer is poured in the concrete after grouting, the problem of water channeling does not exist, the purpose of repairing the damage of the waterproof layer is achieved, and meanwhile, the post-pouring belt reinforcing effect is also achieved.
(4) The invention fills the water storage cavity outside the post-cast strip, changes the water in the cavity into fissure water, and extrudes the pressure water to the outer side of the building, so that the pressure water is changed into non-pressure water or micro-pressure water, and the problem of water seepage can be fundamentally solved. Grouting material (thick liquid) and soil body closely combine to form a whole, wait to grout the shaping after, its structural shape alternates between the bottom plate, forms a tenon fourth of the twelve earthly branches structure, and is inseparable firm more. The water seepage problem is solved, meanwhile, the underground building is reinforced, and the problems of long time, uneven settlement of the building and the like can be solved.
Drawings
Fig. 1 is a schematic view of a basement post-cast strip plugging structure.
Fig. 2 is a distribution diagram of grouting holes of the post-cast strip plugging structure.
Wherein, the grouting method comprises the steps of 1-grouting pipe, 2-water-resistant bottom plate, 3-grouting range, 4-post-cast strip part and 5-grouting hole.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The process flow of the invention is as follows: cleaning a base layer → checking a grouting part → arranging a hole → drilling a hole → cleaning the hole, protecting the hole → arranging a grouting material → grouting, repeatedly checking the grouting → consolidating → dismantling the nozzle.
Example 1:
as shown in fig. 1 and 2, reference numeral 1 is a grouting pipe, reference numeral 2 is a water-resistant bottom plate, reference numeral 3 is a grouting range, reference numeral 4 is a post-cast strip part, reference numeral 5 is a grouting hole, a distance (a) of the grouting hole from the center line of the post-cast strip to the left and right sides is 1m, a distance (B) along the length of the post-cast strip is 1m, and the grouting hole penetrates into a soil body 1 m.
The invention designs a basement post-cast strip leaking stoppage grouting and reinforcing construction method, which comprises the following specific steps:
1) cleaning a base layer: professional constructors clean impurities on the surface of the base layer;
2) checking the grouting part: checking a construction drawing according to the site position, and analyzing a specific grouting part;
3) hole distribution: analyzing geology, and arranging grouting hole sites from one end of the post-cast strip to the other end according to conditions, wherein the distance between the grouting hole sites from the center line of the post-cast strip to the left side and the right side is 1m, and the distance between the grouting hole sites and the left side and the right side is 1m along the length of the post-cast strip;
4) drilling: after hole arrangement is finished, a constructor uses a concrete drilling core-taking machine according to the hole arrangement position (the constructor can operate the equipment more safely) to make the depth of a grouting hole which enters a soil body by 1m and the center of the hole is vertical to a water-resistant bottom plate (also a raft plate);
5) cleaning and protecting the holes: after drilling is finished, immediately cleaning up dregs in the grouting hole, and then adopting a protective measure to protect the grouting hole, and strictly prohibiting the entry of sundries;
6) distributing a nozzle: a grouting pipe (a small grouting hole is arranged on the pipe, and a valve controllable switch is arranged on the pipe) is arranged in the drilled grouting hole, so that no gap exists between the periphery of the grouting pipe and the grouting hole, water leakage does not occur, and looseness during high-pressure grouting is avoided;
7) preparing slurry: preparing grouting liquid, and mixing cement and water according to the proportion of the grouting liquid, wherein the proportion of cement and water is 1: stirring for 20 minutes at a ratio of 0.8, and simultaneously mixing water and a multifunctional high-strength water-based grouting agent (comprising the main components of water glass, sodium aluminate, modified water-based epoxy resin, barium acrylate, a curing agent and the like in a mass ratio of 0.8: 0.2: 0.04: 0.03: 0.03) according to a ratio of 48: stirring for 10 minutes according to the proportion of 0.9;
8) grouting: after pressure testing, under the condition that the structure pressure range is not exceeded, grouting liquid ('water + cement' and 'water + multifunctional high-strength water-based grouting agent') is poured into the grouting holes, when the grouting liquid is poured, the grouting liquid is gradually poured from one side of a post-pouring belt to the other side, the pouring pressure is 1.6MPa, the grouting liquid is tightly combined with earth and stones by adopting a multi-time supplementary grouting mode, grouting is stopped until the grouting pressure changes smoothly, grouting is stopped after the grouting pressure is stable, a valve on a grouting pipe is closed, and adjacent grouting holes are changed;
9) consolidation: waiting for the slurry to solidify;
10) removing the nozzle: after grouting is finished, after observation is carried out for a period of time (30 h), the residual grouting pipe exceeding the ground is cut off after the leakage stopping effect (no water leakage) is confirmed.
Example 2:
as shown in fig. 1 and 2, reference numeral 1 is a grouting pipe, reference numeral 2 is a water-resistant bottom plate, reference numeral 3 is a grouting range, reference numeral 4 is a post-cast strip part, reference numeral 5 is a grouting hole, the distance (a) of the grouting hole from the center line of the post-cast strip to the left and right sides is 1.5m, the distance (B) along the length of the post-cast strip is 1.5m, and the grouting hole penetrates into the soil body 1.2 m.
The invention designs a basement post-cast strip leaking stoppage grouting and reinforcing construction method, which comprises the following specific steps:
1) cleaning a base layer: professional constructors clean impurities on the surface of the base layer;
2) checking the grouting part: checking a construction drawing according to the site position, and analyzing a specific grouting part;
3) hole distribution: analyzing geology, and arranging grouting hole sites from one end of the post-cast strip to the other end according to conditions, wherein the distance between the grouting hole sites from the center line of the post-cast strip to the left side and the right side is 1.5m, and the distance between the grouting hole sites and the left side and the right side is 1.5m along the length of the post-cast strip;
4) drilling: after hole distribution is finished, a constructor uses a concrete drilling core-taking machine according to the hole distribution position (the constructor can operate the equipment more safely) to make the depth of the concrete drilling core-taking machine be 1.2m when the concrete drilling core-taking machine enters a soil body, and the center of each hole is vertical to a grouting hole of a water-resistant bottom plate (also used as a raft plate);
5) cleaning and protecting the holes: after drilling is finished, immediately cleaning up dregs in the grouting hole, and then adopting a protective measure to protect the grouting hole, and strictly prohibiting the entry of sundries;
6) distributing a nozzle: a grouting pipe (a small grouting hole is arranged on the pipe, and a valve controllable switch is arranged on the pipe) is arranged in the drilled grouting hole, so that no gap exists between the periphery of the grouting pipe and the grouting hole, water leakage does not occur, and looseness during high-pressure grouting is avoided;
7) preparing slurry: preparing grouting liquid, namely mixing cement and water according to a slurry ratio of 1.2: stirring for 25 minutes at a ratio of 0.8, and simultaneously mixing water and a multifunctional high-strength water-based grouting agent (comprising a plurality of materials such as water glass, sodium aluminate, modified water-based epoxy resin, barium acrylate, a curing agent and the like which are used as main components in a mass ratio of 1.2: 0.8: 0.06: 0.08: 0.05) according to a ratio of 53: 1.3 stirring for 5 minutes;
8) grouting: after pressure testing, under the condition that the structure pressure range is not exceeded, grouting liquid ('water + cement' and 'water + multifunctional high-strength water-based grouting agent') is poured into the grouting holes, when the grouting liquid is poured, the grouting liquid is gradually poured from one side of a post-pouring belt to the other side, the pouring pressure is 1.0 MPa, the grouting liquid is tightly combined with earth and stones by adopting a multi-time supplementary grouting mode, grouting is stopped until the grouting pressure changes smoothly, grouting is stopped after the grouting pressure is stable, a valve on a grouting pipe is closed, and adjacent grouting holes are changed;
9) consolidation: waiting for the slurry to solidify;
10) removing the nozzle: after grouting is finished, after observation for a period of time (24 hours), the residual grouting pipe exceeding the ground is cut off after the leakage stopping effect (no water leakage) is confirmed.
Example 3:
as shown in fig. 1 and 2, reference numeral 1 is a grouting pipe, reference numeral 2 is a water-resistant bottom plate, reference numeral 3 is a grouting range, reference numeral 4 is a post-cast strip part, reference numeral 5 is a grouting hole, the distance (a) of the grouting hole from the center line of the post-cast strip to the left and right sides is 1.2m, the distance (B) along the length of the post-cast strip is 1.2m, and the grouting hole penetrates into the soil body 1.1 m.
The invention designs a basement post-cast strip leaking stoppage grouting and reinforcing construction method, which comprises the following specific steps:
1) cleaning a base layer: professional constructors clean impurities on the surface of the base layer;
2) checking the grouting part: checking a construction drawing according to the site position, and analyzing a specific grouting part;
3) hole distribution: analyzing geology, and arranging grouting hole sites from one end of the post-cast strip to the other end according to conditions, wherein the distance between the grouting hole sites from the center line of the post-cast strip to the left side and the right side is 1.2m, and the distance between the grouting hole sites and the left side and the right side is 1.2m along the length of the post-cast strip;
4) drilling: after hole distribution is finished, a constructor uses a concrete drilling core-taking machine according to the hole distribution position (the constructor can operate the equipment more safely) to make the depth of the concrete drilling core-taking machine be 1.1m when the concrete drilling core-taking machine enters a soil body, and the center of each hole is vertical to a grouting hole of a water-resistant bottom plate (also used as a raft plate);
5) cleaning and protecting the holes: after drilling is finished, immediately cleaning up dregs in the grouting hole, and then adopting a protective measure to protect the grouting hole, and strictly prohibiting the entry of sundries;
6) distributing a nozzle: a grouting pipe (a small grouting hole is arranged on the pipe, and a valve controllable switch is arranged on the pipe) is arranged in the drilled grouting hole, so that no gap exists between the periphery of the grouting pipe and the grouting hole, water leakage does not occur, and looseness during high-pressure grouting is avoided;
7) preparing slurry: preparing grouting liquid, and mixing cement and water according to the proportion of the grouting liquid, namely, according to the weight ratio of 0.8: 1.2, stirring for 20 minutes, and simultaneously mixing water and a multifunctional high-strength water-based grouting agent (the main components comprise water glass, sodium aluminate, modified water-based epoxy resin, barium acrylate, a curing agent and the like, wherein the mass ratio of the materials is 1: 0.5: 0.05: 0.06: 0.04) according to a ratio of 50: 1, stirring for 8 minutes;
8) grouting: after pressure testing, under the condition that the structure pressure range is not exceeded, grouting liquid ('water + cement' and 'water + multifunctional high-strength water-based grouting agent') is poured into the grouting holes, when the grouting liquid is poured, the grouting liquid is gradually poured from one side of a post-pouring belt to the other side, the pouring pressure is 0.5MPa, the grouting liquid is tightly combined with earth and stones by adopting a multi-time supplementary grouting mode, grouting is stopped until the grouting pressure changes smoothly, grouting is stopped after the grouting pressure is stable, a valve on a grouting pipe is closed, and adjacent grouting holes are changed;
9) consolidation: waiting for the slurry to solidify;
10) removing the nozzle: after grouting is finished, after observation for a period of time (28 h), the residual grouting pipe exceeding the ground is cut off after the leakage stopping effect (no water leakage) is confirmed.
Example 4:
as shown in fig. 1 and 2, reference numeral 1 is a grouting pipe, reference numeral 2 is a water-resistant bottom plate, reference numeral 3 is a grouting range, reference numeral 4 is a post-cast strip part, reference numeral 5 is a grouting hole, the distance (a) of the grouting hole from the center line of the post-cast strip to the left and right sides is 1.2m, the distance (B) along the length of the post-cast strip is 1.5m, and the grouting hole penetrates into the soil body 1 m.
The invention designs a basement post-cast strip leaking stoppage grouting and reinforcing construction method, which comprises the following specific steps:
1) cleaning a base layer: professional constructors clean impurities on the surface of the base layer;
2) checking the grouting part: checking a construction drawing according to the site position, and analyzing a specific grouting part;
3) hole distribution: analyzing geology, and arranging grouting hole sites from one end of the post-cast strip to the other end according to conditions, wherein the distance between the grouting hole sites from the center line of the post-cast strip to the left side and the right side is 1.2m, and the distance between the grouting hole sites along the length of the post-cast strip is 1.5 m;
4) drilling: after hole arrangement is finished, a constructor uses a concrete drilling core-taking machine according to the hole arrangement position (the constructor can operate the equipment more safely) to make the depth of a grouting hole which enters a soil body by 1m and the center of the hole is vertical to a water-resistant bottom plate (also a raft plate);
5) cleaning and protecting the holes: after drilling is finished, immediately cleaning up dregs in the grouting hole, and then adopting a protective measure to protect the grouting hole, and strictly prohibiting the entry of sundries;
6) distributing a nozzle: a grouting pipe (a small grouting hole is arranged on the pipe, and a valve controllable switch is arranged on the pipe) is arranged in the drilled grouting hole, so that no gap exists between the periphery of the grouting pipe and the grouting hole, water leakage does not occur, and looseness during high-pressure grouting is avoided;
7) preparing slurry: preparing grouting liquid, and mixing cement and water according to the proportion of the grouting liquid, wherein the proportion of cement and water is 1: 1, stirring for 18 minutes, and simultaneously mixing water and a multifunctional high-strength water-based grouting agent (comprising the main components of water glass, sodium aluminate, modified water-based epoxy resin, barium acrylate, a curing agent and the like in a mass ratio of 1.1: 0.4: 0.05: 0.06: 0.04) according to a ratio of 50: 1, stirring for 10 minutes;
8) grouting: after pressure testing, under the condition that the structure pressure range is not exceeded, grouting liquid ('water + cement' and 'water + multifunctional high-strength water-based grouting agent') is poured into the grouting holes, when the grouting liquid is poured, the grouting liquid is gradually poured from one side of a post-pouring belt to the other side, the pouring pressure is 1.2MPa, the grouting liquid is tightly combined with earth and stones by adopting a multi-time supplementary grouting mode, grouting is stopped until the grouting pressure changes smoothly, grouting is stopped after the grouting pressure is stable, a valve on a grouting pipe is closed, and adjacent grouting holes are changed;
9) consolidation: waiting for the slurry to solidify;
10) removing the nozzle: after grouting is finished, after observation is carried out for a period of time (30 h), the residual grouting pipe exceeding the ground is cut off after the leakage stopping effect (no water leakage) is confirmed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (4)
1. The basement post-cast strip leaking stoppage grouting and reinforcement construction method is characterized by comprising the following steps of: the method comprises the following specific steps:
1) cleaning a base layer;
2) checking the grouting part: checking a construction drawing according to the site position, and analyzing a specific grouting part;
3) hole distribution: analyzing geology, and arranging grouting hole sites from one end of the post-cast strip to the other end according to conditions, wherein the distance between the grouting hole sites from the center line of the post-cast strip to the left side and the right side is 1-1.5m, and the distance between the grouting hole sites and the left side and the right side is 1-1.5m along the length of the post-cast strip;
4) drilling: after hole distribution is finished, a constructor drills a grouting hole which has the depth of 1-1.2 m and is vertical to the center of the hole on the water-resistant bottom plate according to the hole distribution position;
5) cleaning and protecting the holes: after drilling is finished, cleaning up dregs in the grouting holes, and then adopting a protective measure to protect the grouting holes;
6) distributing a nozzle: installing a grouting pipe in the drilled grouting hole, so that no gap exists between the periphery of the grouting pipe and the grouting hole, no water leakage occurs, and the grouting pipe is prevented from loosening during high-pressure grouting;
7) preparing slurry: preparing grouting liquid, and mixing cement and water according to the proportion of the grouting liquid, wherein the proportion of cement and water is 0.8-1.2: stirring for 20-25 minutes at a ratio of 0.8-1.2, and simultaneously mixing water and the multifunctional high-strength water-based grouting agent according to the weight ratio of 48-53: stirring for 5-10 minutes at a ratio of 0.9-1.3;
8) grouting: after pressure testing, grouting slurry into the grouting holes, gradually grouting from one side of the post-cast strip to the other side when grouting slurry, tightly combining the slurry with the earth and the stone by adopting a multi-time supplementary grouting mode, stopping grouting until the grouting pressure changes smoothly, closing a valve on a grouting pipe, and re-grouting adjacent grouting holes;
9) consolidation: waiting for the slurry to solidify;
10) removing the nozzle: after grouting is finished, observing for a period of time, and cutting off redundant grouting pipes which exceed the ground after the leakage stopping effect is confirmed.
2. The basement post-cast strip leaking stoppage grouting and reinforcement construction method according to claim 1, characterized in that: the pipe wall of grout pipe is provided with little grout hole, and still is provided with the valve on the grout pipe.
3. The basement post-cast strip leaking stoppage grouting and reinforcement construction method according to claim 1, characterized in that: the multifunctional high-strength water-based grouting agent is prepared from the following components in parts by mass of 0.8-1.2: 0.2-0.8: 0.04-0.06: 0.03 to 0.08: 0.03-0.05 of water glass, sodium aluminate, modified waterborne epoxy resin, barium acrylate and a curing agent.
4. The basement post-cast strip leaking stoppage grouting and reinforcement construction method according to claim 1, 2 or 3, characterized in that: in the step 8), a hydraulic double-liquid grouting pump is adopted during pressure testing, and the pressure testing is carried out within a structure pressure-bearing range; when the perfusion is carried out, the perfusion pressure is 0.5-1.6 MPa.
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| CN202010705313.2A CN111809669A (en) | 2020-07-21 | 2020-07-21 | Basement post-cast strip leaking stoppage grouting and reinforcing construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006151A (en) * | 2021-02-22 | 2021-06-22 | 四川童燊防水工程有限公司 | Grouting, plugging and reinforcing construction method for basement post-cast strip |
Citations (3)
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|---|---|---|---|---|
| CN101864778A (en) * | 2010-06-30 | 2010-10-20 | 广东省基础工程公司 | Method for leaking stoppage of external wall of underground structure |
| CN101914917A (en) * | 2010-08-10 | 2010-12-15 | 中铁一局集团有限公司 | Anti-seepage and leak-blocking construction method for excavation of subway foundation pit in soft soil area |
| CN103015984A (en) * | 2012-12-19 | 2013-04-03 | 河南焦煤能源有限公司科学技术研究所 | Method for measuring gas pressure of coal seam by casing high-pressure hole sealing method |
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2020
- 2020-07-21 CN CN202010705313.2A patent/CN111809669A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864778A (en) * | 2010-06-30 | 2010-10-20 | 广东省基础工程公司 | Method for leaking stoppage of external wall of underground structure |
| CN101914917A (en) * | 2010-08-10 | 2010-12-15 | 中铁一局集团有限公司 | Anti-seepage and leak-blocking construction method for excavation of subway foundation pit in soft soil area |
| CN103015984A (en) * | 2012-12-19 | 2013-04-03 | 河南焦煤能源有限公司科学技术研究所 | Method for measuring gas pressure of coal seam by casing high-pressure hole sealing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006151A (en) * | 2021-02-22 | 2021-06-22 | 四川童燊防水工程有限公司 | Grouting, plugging and reinforcing construction method for basement post-cast strip |
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