CN112900512A - Basement bottom plate crack punching, reinforcing and repairing construction method - Google Patents
Basement bottom plate crack punching, reinforcing and repairing construction method Download PDFInfo
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- CN112900512A CN112900512A CN202110099365.4A CN202110099365A CN112900512A CN 112900512 A CN112900512 A CN 112900512A CN 202110099365 A CN202110099365 A CN 202110099365A CN 112900512 A CN112900512 A CN 112900512A
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 32
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000004080 punching Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 94
- 239000004568 cement Substances 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000005336 cracking Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 238000004901 spalling Methods 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000002344 surface layer Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000007779 soft material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 2
- 239000011440 grout Substances 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 6
- 230000035699 permeability Effects 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 description 8
- 230000008439 repair process Effects 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
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Abstract
The invention discloses a basement bottom plate crack punching, reinforcing and repairing construction method, wherein a pressure relief hole is arranged in a bottom plate crack water seepage area for water diversion, the pressure of underground water on a bottom plate is reduced, then grout is injected in a high-pressure grouting mode for repairing and filling the bottom plate, the cement grout has good permeability on concrete, the bonding effect is good, cracks can be effectively sealed, the adding proportion of water glass is controlled in the grouting process, the grout hardening time is shortened, the bonding property and hardness of the grouting liquid after grouting are improved, the problem that the grout is washed away by most of the grouting liquid due to overlarge underground flowing water can be effectively avoided, the area is reinforced and reinforced after grouting is finished, and the purpose of repairing cracks and reinforcing the bottom plate is achieved.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a basement bottom plate crack punching, reinforcing and repairing construction method.
Background
In recent years, with the rapid development of urban construction in China, urban population is more and more, available space on the ground is more and more limited, and the development and utilization of underground space become a necessary trend. Therefore, a large number of underground buildings (structures) such as high-rise buildings with basements, underground malls, underground garages and the like emerge. With the development and utilization of underground space, the depth and the volume of underground concrete structures are increasing. After the construction of the basement is completed, under the influence of peripheral rainfall, the concrete bottom plate of the basement is easy to float upwards, rise and deform, cracks of different degrees are generated at the same time, and large cracks are also easy to generate on members such as columns, beams and the like in the basement structure. This seriously affects the normal use and safety of underground structures, often needs to adopt methods such as loading and bottom plate release pressure to make the structure float up stably and recover to the original state as far as possible, and must carry out reinforcement to the damaged component simultaneously.
For the basement bottom plate cracking and water seepage accident, the summary is often caused by the following three conditions:
1. cracking of the basement bottom plate caused by quality problems in concrete pouring;
2. cracking of the basement bottom plate caused by foundation settlement;
3. the basement bottom plate cracks due to the fact that the underground water pressure is too large.
In the first case, the cracks generated on the bottom plate are usually concrete shrinkage cracks caused by over-high temperature generated during concrete pouring, and the strength of the basement bottom plate can generally meet the strength requirement, so that the basement bottom plate is only plugged by adopting micro-expansion cement and a waterproof agent. However, the cracks generated in the second and third cases are caused by the fact that the strength of the basement bottom plate concrete does not meet the strength requirement, the cracks are serious and can be continuously developed, a simple plugging method cannot be adopted at the moment, and particularly, in the third case, due to cracking caused by overlarge underground water pressure and overlarge underground flowing water, grout is washed away by most of the grouted grout, so that the effect of repairing the cracks and reinforcing the bottom plate cannot be achieved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a basement bottom plate crack-punching, reinforcing and repairing construction method, which can effectively avoid the problem that most of grouting slurry is washed away due to overlarge underground flowing water, achieve the effect of repairing cracks and reinforcing the bottom plate, and play a role in reinforcing underground buildings while solving the water seepage problem.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a basement bottom plate crack punching, reinforcing and repairing construction method comprises the following steps:
s1, installing a pressure relief pipe: a pressure relief hole is arranged in a cracking water seepage area of the bottom plate in advance, a pressure relief pipe is installed, and the pressure of underground water is relieved in a subarea manner;
s2, leak repairing:
s21, chiseling loose concrete in the weak water seepage area;
s22, adopting quick-drying cement to seal and stop leakage;
s23, filling the chiseling position with high-strength grouting material;
s3, arranging grouting pipes for high-pressure grouting;
and S4, reinforcing the water seepage position.
Preferably, the S1 includes the following steps:
s11, setting a pre-drilling position in the cracking and water seepage area of the bottom plate, installing a flange plate at the pre-drilling position, drilling the pre-drilling position, connecting a pressure relief pipe after the drilling penetrates through the bottom plate, and connecting an elbow end of the pressure relief pipe to the flange plate;
s12, wrapping the periphery of the pressure relief pipe with a soft material and quick-drying cement;
and S13, connecting the fire hose through a pressure relief pipe, and pumping and draining the underground water to a water collecting well.
Preferably, the specific method of S21 is: and chiseling out the water seepage crack area and the weak concrete at the periphery, wherein the chiseling-out thickness is judged according to the on-site concrete quality and the cracking size until a compact concrete surface layer or an original structural steel bar surface layer is reached.
Preferably, the specific method of S22 is: and (3) sealing the water seepage surface at the water seepage points in the chiseling area by using quick-drying cement or leak stopping agent to slow down the leakage of underground water on the surface of the bottom plate, and if the water pressure is still too high, repeating the step S1 to increase the number of the pressure relief holes and the pressure relief pipes and then performing leak repairing treatment.
Preferably, the specific method of S23 is: and filling the chiseling position by using high-strength grouting material, wherein the filling thickness is judged according to the chiseling thickness.
Preferably, the specific steps of S3 are as follows:
s31, grouting hole drilling arrangement: arranging grouting holes at the bottom plate, wherein the grouting holes penetrate through the bottom plate, and recording the first water-meeting depth in the drilling process;
s32, mounting a grouting pipe: the grouting pipe adopts a three-way grouting pipe, the pipe diameter specification of the grouting pipe corresponds to the aperture of the grouting hole, and the grouting pipe is inserted into the grouting hole; if water seeps from the bearing platform, a grouting hole formed at the joint of the bottom plate and the bearing platform needs to drill through the bottom plate around the bearing platform, and the periphery of the grouting pipe and the sealing hole of the grouting pipe are wrapped by a flexible material and quick-drying cement to ensure that no gap exists between the grouting pipe and the hole wall;
s33, preparing cement slurry: the grouting liquid is pure cement slurry, and an early strength water reducing agent or water glass is doped into the grouting liquid;
s34, high-pressure grouting: in the grouting process, other grouting ports are in a closed state, a valve port is opened to observe whether the grouting pressure exists or not, the smooth change condition of the bottom plate around the grouting hole is observed at any time, and the phenomenon of bottom plate uplift caused by overlarge grouting pressure is prevented; stopping grouting when the grouting pressure reaches a certain pressure value, observing the water leakage condition after waiting, and opening holes again for grouting if a water leakage point exists; the grouting needs to be carried out in a plurality of times, each grouting hole is grouted in a plurality of times until stable pressure returns, whether the grouting hole is blocked by cement slurry is checked after the strength is reached, and the steps are repeated until all the grouting holes are blocked; and (3) drilling holes at the water seepage edge position and embedding a grouting nozzle if a small amount of water seepage occurs on the surface after grouting, and performing grouting sealing treatment on the surface cracks by using a polyurethane foaming water-stop agent.
Preferably, the specific method of S4 is: for the position which is broken by the water pressure to the bottom plate or has larger cracks, after grouting, an upper cover steel plate is adopted to be matched with a full-thread anchor rod to anchor and reinforce the bottom plate area of the water seepage bearing platform; and for the water seepage position with smaller cracks, welding, reinforcing and reinforcing treatment is carried out by adopting implanted steel bars and a pressing steel plate after grouting.
Preferably, in S33, the grouting liquid is 42.5R cement, and the grouting position of the floor is as follows according to the water cement ratio: the cement mortar is prepared and made in a ratio of 1:1, the amount of water glass added into each cubic of cement paste is 10KG, grouting needs to penetrate through a bottom plate at a grouting position where the bottom plate and a bearing platform are connected, the cement consumption is increased, and the water cement ratio is controlled to be 0.8: 1.
Preferably, in S31, one grouting hole is provided every 2m × 2m, and the diameter of the grouting hole is Φ 25 mm.
Preferably, in the step S34, the W150 pump is adopted for high-pressure grouting, the pressure during the high-pressure grouting needs to be kept between 0.4 and 0.6Mpa, and if the single-hole grouting amount exceeds 8m3Or 5t of dry materials, grouting can be carried out through the replaceable holes.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a basement bottom plate crack punching, reinforcing and repairing construction method, wherein a pressure relief hole is arranged in a cracking and water seepage area of a bottom plate to conduct water diversion, the pressure of underground water on the bottom plate is reduced, then grout is injected in a high-pressure grouting mode to repair and fill the bottom plate, the cement grout has good permeability on concrete, the bonding effect is good, cracks can be effectively sealed, the adding proportion of water glass is controlled in the grouting process, the grout hardening time is shortened, the bonding property and hardness of the grouting liquid after grouting are improved, the problem that most of the grout is washed away after grouting due to overlarge underground flowing water can be effectively solved, the area is reinforced and reinforced after grouting is completed, and the purpose of repairing cracks and reinforcing the bottom plate is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of the basement floor decompression grouting repair of the present invention;
FIG. 2 is a plan view of the basement floor spalling reinforcement repair structure of the present invention;
FIG. 3 is a structural diagram of the basement floor upper cover steel plate of the invention cooperating with the anchoring reinforcement of the full thread anchor rod;
description of reference numerals:
1-bottom plate, 2-pressure relief pipe, 3-pressure relief hole, 4-grouting hole, 5-grouting pipe, 6-steel plate, 7-full thread anchor rod, 8-reinforcing steel bar and 9-double nut.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. 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.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1 to 3, an embodiment of the present invention provides a basement floor spalling reinforcement repair construction method, including the following steps:
s1, installing a pressure relief pipe, specifically:
s11, setting a pre-drilling position in the fractured and water-permeable area of the bottom plate 1, installing a flange plate at the pre-drilling position, drilling the pre-drilling position, connecting the pressure relief pipe 2 after the drilling penetrates through the bottom plate 1, connecting an elbow end of the pressure relief pipe 2 to the flange plate position, connecting the pipe head of the pressure relief pipe 2 to the bottom plate to a depth of 35cm, and wrapping the end of the pipeline of the pressure relief pipe 2 by geotextile to prevent underground soil or sand from flowing into an underground chamber along with underground water;
s12, wrapping the periphery of the pressure relief pipe 2 with a soft material and quick-drying cement;
s13, connecting the fire hose through the pressure relief pipe 2, pumping and draining the underground water to a water collecting well, and carrying out pressure relief on the pressure of the underground water in a subarea manner;
s2, leak repairing:
s21, chiseling loose concrete in the weak water seepage area, specifically: chiseling out a water seepage crack area and weak concrete at the periphery, wherein the chiseling-out thickness is judged according to the on-site concrete quality and the crack size until a compact concrete surface layer or an 8-surface layer of the original structural steel bar is achieved;
s22, adopting quick-drying cement to seal and stop leakage, and filling and chiseling the position with high-strength grouting material, specifically: sealing the water seepage surface at the water seepage points in the chiseling area by using quick-drying cement or leak stopping agent to slow down the seepage of underground water on the surface of the bottom plate 1, and if the water pressure is still too high, repeating the step S1 to increase the number of the pressure relief holes 3 and the pressure relief pipes 2 and then performing leak stopping treatment;
s23, filling and chiseling positions with high-strength grouting materials, specifically: filling the chiseling position with a high-strength grouting material, and judging the filling thickness according to the chiseling thickness to ensure the bonding strength and the bonding property of the high-strength grouting material and the original concrete;
s3, arranging a grouting pipe 5 for high-pressure grouting, and specifically comprising the following steps:
s31, drilling and arranging grouting holes 4: the grouting holes 4 are arranged at the bottom plate 1 according to a quincunx shape, the bottom plate 1 is punched through, the first water-meeting depth is recorded, and the drilling process needs to be continued until the depth is met due to the possibility of water spraying;
s32, installing a grouting pipe 5: the grouting pipe 5 adopts a three-way grouting pipe 5, the pipe diameter specification of the grouting pipe 5 corresponds to the aperture of the grouting hole 4, and the grouting pipe is inserted into the grouting hole 4; if water seeps from the position of the bearing platform, a grouting hole 4 formed in the joint position of the bottom plate 1 and the bearing platform needs to drill through the bottom plate 1 around the bearing platform, a flexible material and quick-drying cement are used for wrapping the periphery of a sealing hole of the grouting pipe 5 and the periphery of the grouting pipe 5, so that no gap is formed between the grouting pipe 5 and the hole wall, and as a large amount of underground water is flushed to the position of the hole after the hole is formed, plugging substances can be damaged for multiple times by water, and therefore, repeated construction is expected to be needed for plugging until the hole is completely plugged;
s33, preparing cement slurry: the grouting liquid is pure cement slurry, and an appropriate amount of early strength water reducing agent or water glass is doped into the grouting liquid; the addition of the water glass can increase the cohesiveness of the cement paste, accelerate the setting speed and effectively reduce the hardening time so as to improve the grouting plugging effect.
S34, high-pressure grouting: in the grouting process, other grouting ports are in a closed state, a valve port is opened to observe whether the grouting pressure exists or not, the smooth change condition of the bottom plate 1 around the grouting hole 4 is observed at any time, and the phenomenon that the bottom plate 1 bulges due to overlarge grouting pressure is prevented; stopping grouting when the grouting pressure reaches a set pressure value (1mpa), waiting for 12-36 hours, observing water leakage, and opening holes again for grouting if water leakage points exist; because the underground water pressure is large, grouting can not reach the expected effect once, therefore, grouting needs to be carried out in a grading way, grouting is carried out for each grouting hole 4 in a grading way until stable pressure returns, whether the grouting hole 4 is blocked by cement slurry is checked after the strength of the next day is reached, and the steps are repeated until all the grouting holes 4 are blocked; after grouting, if a small amount of water spot seepage occurs on the surface, drilling holes at the position of the seepage edge, wherein the hole depth is 150mm, embedding a grouting nozzle, and performing grouting sealing treatment on surface cracks by using a polyurethane foaming water-stop agent;
s4, reinforcing the water seepage position, specifically: for the position where the bottom plate 1 is broken by water pressure or the crack is large, after grouting, an upper cover steel plate 6 is adopted to be matched with a full-thread anchor rod 7 to anchor and reinforce the area of the bottom plate 1 of the water seepage bearing platform through a double nut 9, and after reinforcement, reinforcing steel bars are bound to pour concrete for treatment; and for the water seepage position with smaller cracks, after grouting, drilling implanted steel bars 8 and a pressing steel plate 6 are adopted for welding reinforcement, and then the steel bars 8 are bound to pour concrete for treatment.
Preferably, in S33, the grouting liquid is 42.5R cement, and the grouting position of the bottom plate 1 is as follows according to the water cement ratio: the cement grout is prepared and pulped according to the proportion of 1:1, the amount of the added water glass in each cubic of cement grout is 10KG, and because underground flowing water is rich and the fluidity is strong, grouting needs to penetrate through the bottom plate 1 at the joint grouting position of the bottom plate 1 and the bearing platform, the cement consumption is increased, the water cement ratio is controlled to be 0.8:1, so that the cement grout wraps the joint position of the bottom plate and the bearing platform, and the loss amount of the cement grout is reduced. The cement grout has good permeability to concrete and good bonding effect, and can effectively seal cracks.
Preferably, in S31, one grouting hole 4 is provided every 2m × 2m, and the diameter of the grouting hole 4 is Φ 25 mm.
Preferably, in the step S34, the W150 pump is adopted for high-pressure grouting, the pressure during the high-pressure grouting needs to be kept between 0.4 and 0.6Mpa, and if the single-hole grouting amount exceeds 8m3Or 5t of dry materials, grouting can be carried out through the replaceable holes.
The invention has the beneficial effects that:
1. the invention adopts a method of installing pressure relief holes to guide water in a cracking and water seepage area of the bottom plate in advance, holes are formed, pressure relief pipes are installed to guide groundwater to drain to a plurality of peripheral water collecting wells, and water pumping and draining treatment is carried out on accumulated water on site, so that the pressure of the groundwater on the bottom plate is reduced.
2. The grouting treatment is carried out by adopting the mixed grout of the cement paste and the water glass which are prepared in a certain proportion, the grout can effectively form an integral body with the original structural concrete to fill cracks and repair cracks of the bottom plate, and the grouting pressure is controlled in the grouting process to prevent the bottom plate from floating. After grouting, reinforcing according to the field condition, and after grouting, adopting an upper cover steel plate to be matched with a full-thread anchor rod for anchoring and reinforcing, and then pouring concrete for processing at the position where the original structure concrete has poor quality and large cracks and has a water burst phenomenon before grouting; to the less position that appears seeping water of crack before the slip casting, adopt behind the slip casting to implant reinforcing bar and push down the steel sheet and weld the concreting after the reinforcement and handle, effectively increase bottom plate anti-buoyancy.
3. The invention can effectively reduce the loss of cement grout in the high-pressure grouting process, can avoid the damage to the concrete of the original structure by using the cement grout to repair cracks, can effectively fill the problem of water seepage caused by the cracks of the floor concrete due to high-water-pressure cracking, reduces the rework rate, ensures the construction quality, saves the construction period and the construction cost, and has safe technology.
It should be noted that other contents of the basement bottom plate crack initiation, reinforcement and repair construction method disclosed by the invention can be referred to in the prior art, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. The basement bottom plate crack punching, reinforcing and repairing construction method is characterized by comprising the following steps of:
s1, installing a pressure relief pipe: a pressure relief hole is arranged in a cracking water seepage area of the bottom plate in advance, a pressure relief pipe is installed, and the pressure of underground water is relieved in a subarea manner;
s2, leak repairing:
s21, chiseling loose concrete in the weak water seepage area;
s22, adopting quick-drying cement to seal and stop leakage;
s23, filling the chiseling position with high-strength grouting material;
s3, arranging grouting pipes for high-pressure grouting;
and S4, reinforcing the water seepage position.
2. The basement bottom plate spalling, reinforcing and repairing construction method of claim 1, wherein the S1 comprises the following steps:
s11, setting a pre-drilling position in the cracking and water seepage area of the bottom plate, installing a flange plate at the pre-drilling position, drilling the pre-drilling position, connecting a pressure relief pipe after the drilling penetrates through the bottom plate, and connecting an elbow end of the pressure relief pipe to the flange plate;
s12, wrapping the periphery of the pressure relief pipe with a soft material and quick-drying cement;
and S13, connecting the fire hose through a pressure relief pipe, and pumping and draining the underground water to a water collecting well.
3. The basement bottom plate spalling, reinforcing and repairing construction method of claim 1, wherein the specific method of S21 is as follows: and chiseling out the water seepage crack area and the weak concrete at the periphery, wherein the chiseling-out thickness is judged according to the on-site concrete quality and the cracking size until a compact concrete surface layer or an original structural steel bar surface layer is reached.
4. The basement bottom plate spalling, reinforcing and repairing construction method of claim 1, wherein the specific method of S22 is as follows: and (3) sealing the water seepage surface at the water seepage points in the chiseling area by using quick-drying cement or leak stopping agent to slow down the leakage of underground water on the surface of the bottom plate, and if the water pressure is still too high, repeating the step S1 to increase the number of the pressure relief holes and the pressure relief pipes and then performing leak repairing treatment.
5. The basement bottom plate spalling, reinforcing and repairing construction method of claim 1, wherein the specific method of S23 is as follows: and filling the chiseling position by using high-strength grouting material, wherein the filling thickness is judged according to the chiseling thickness.
6. The basement bottom plate spalling, reinforcing and repairing construction method of claim 1, wherein the S3 comprises the following specific steps:
s31, grouting hole drilling arrangement: arranging grouting holes at the bottom plate, wherein the grouting holes penetrate through the bottom plate, and recording the first water-meeting depth in the drilling process;
s32, mounting a grouting pipe: the grouting pipe adopts a three-way grouting pipe, the pipe diameter specification of the grouting pipe corresponds to the aperture of the grouting hole, and the grouting pipe is inserted into the grouting hole; if water seeps from the bearing platform, a grouting hole formed at the joint of the bottom plate and the bearing platform needs to drill through the bottom plate around the bearing platform, and the periphery of the grouting pipe and the sealing hole of the grouting pipe are wrapped by a flexible material and quick-drying cement to ensure that no gap exists between the grouting pipe and the hole wall;
s33, preparing cement slurry: the grouting liquid is pure cement slurry, and an early strength water reducing agent or water glass is doped into the grouting liquid;
s34, high-pressure grouting: in the grouting process, other grouting ports are in a closed state, a valve port is opened to observe whether the grouting pressure exists or not, the smooth change condition of the bottom plate around the grouting hole is observed at any time, and the phenomenon of bottom plate uplift caused by overlarge grouting pressure is prevented; stopping grouting when the grouting pressure reaches a set pressure value, observing the water leakage condition after waiting, and opening holes again for grouting if water leakage points exist; the grouting needs to be carried out in a plurality of times, each grouting hole is grouted in a plurality of times until stable pressure returns, whether the grouting hole is blocked by cement slurry is checked after the strength is reached, and the steps are repeated until all the grouting holes are blocked; and (3) drilling holes at the water seepage edge position and embedding a grouting nozzle if a small amount of water seepage occurs on the surface after grouting, and performing grouting sealing treatment on the surface cracks by using a polyurethane foaming water-stop agent.
7. The basement bottom plate spalling, reinforcing and repairing construction method of claim 1, wherein the specific method of S4 is as follows: for the position which is broken by the water pressure to the bottom plate or has larger cracks, after grouting, an upper cover steel plate is adopted to be matched with a full-thread anchor rod to anchor and reinforce the bottom plate area of the water seepage bearing platform; and for the water seepage position with smaller cracks, welding, reinforcing and reinforcing treatment is carried out by adopting implanted steel bars and a pressing steel plate after grouting.
8. The basement floor spalling, reinforcing and repairing construction method of claim 6, wherein in the S33, the grouting liquid is 42.5R cement, and the grouting position of the floor is as follows according to the water cement ratio: the cement mortar is prepared and made in a ratio of 1:1, the amount of water glass added into each cubic of cement paste is 10KG, grouting needs to penetrate through a bottom plate at a grouting position where the bottom plate and a bearing platform are connected, the cement consumption is increased, and the water cement ratio is controlled to be 0.8: 1.
9. The basement floor spalling, reinforcing and repairing construction method of claim 6, wherein in the S31, one grouting hole is arranged in each 2m x 2m range, and the diameter of the grouting hole is phi 25 mm.
10. The basement floor spalling, reinforcing and repairing construction method of claim 6, wherein in the S34, a W150 pump is adopted for high-pressure grouting, the pressure during the high-pressure grouting is required to be kept between 0.4 and 0.6MPa, and if the single-hole grouting amount exceeds 8m3Or 5t of dry materials, grouting can be carried out through the replaceable holes.
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