CN113863223A - Repair process for local leakage of underwater concrete wall - Google Patents
Repair process for local leakage of underwater concrete wall Download PDFInfo
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- CN113863223A CN113863223A CN202111197449.8A CN202111197449A CN113863223A CN 113863223 A CN113863223 A CN 113863223A CN 202111197449 A CN202111197449 A CN 202111197449A CN 113863223 A CN113863223 A CN 113863223A
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- 230000008439 repair process Effects 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 162
- 230000007246 mechanism Effects 0.000 claims abstract description 146
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 140
- 238000009415 formwork Methods 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 44
- 239000003292 glue Substances 0.000 claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 19
- 239000011440 grout Substances 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 239000004568 cement Substances 0.000 claims abstract description 15
- 238000013507 mapping Methods 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 239000000853 adhesive Substances 0.000 claims description 23
- 230000001070 adhesive effect Effects 0.000 claims description 23
- 238000005192 partition Methods 0.000 claims description 19
- 239000000835 fiber Substances 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 230000001680 brushing effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- 238000007667 floating Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000010422 painting Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 239000000565 sealant Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011414 polymer cement Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
-
- 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
-
- 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
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a repair process for local leakage of an underwater concrete wall, which belongs to the technical field of water conservancy and hydropower construction and comprises the steps of defining a leakage area on a non-water-contact wall surface, installing a water catchment mechanism and a first sealing mechanism, determining a mapping area of a water guide crack on the non-water-contact wall surface, installing a second sealing mechanism, drilling a grouting hole, fixing a formwork on the water guide crack seam of the water-contact wall surface, pumping water and draining water to the formwork and the crack, injecting cement grout into the formwork, injecting crack pouring glue into the crack and the like. The repair process for local leakage of the underwater concrete wall can completely isolate the areas of cement grout and joint grouting glue from a water source, avoid the interference of water on repair operation, ensure the filling strength of the cement grout and the joint grouting glue, avoid the generation of cavities in a pouring area and enhance the strength of a repair position. The device used in the repairing process is simple in structure and easy and convenient to operate, and the local leakage of the underwater concrete wall can be conveniently repaired.
Description
Technical Field
The invention relates to a repair process for local leakage of an underwater concrete wall, and belongs to the technical field of water conservancy and hydropower construction.
Background
In water conservancy and hydropower engineering, a part of an outer wall of a concrete auxiliary structure for placing electromechanical equipment such as a water suction pump and the like is often positioned below the water surface of river water or a reservoir. In the use process of the hydraulic and hydroelectric engineering, due to factors such as structural stress conditions, foundation deformation, temperature control, water pressure and the like, the condition that cracks occur on the local part of a concrete structure can be caused, and the cracks can be continuously expanded in the wall under the action of the water pressure, so that water leakage is finally generated on the inner wall of an accessory structure. The cracks can be continuously enlarged under the long-term action of the water pressure, the amount of leaked water can be continuously increased, and the use safety of the electromechanical equipment is threatened. For concrete cracks, general repairing methods include a surface treatment method, a grouting method, a polymer immersion method, a drilling and plugging method, and the like. But for the pressurized water-rich cracks, the surface treatment method, the drilling and plugging method and the polymer immersion method can not achieve the purpose of permanent cure because the water supply source can not be plugged; in the grouting method, the water in the cracks cannot be completely displaced by the grout due to the fact that the cracks are completely rich in water and have certain pressure, and the grouting method only has a good reinforcing effect on wide parts in the cracks and cannot achieve the purpose of radically treating the cracks.
The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a repair process for local leakage of an underwater concrete wall, which can completely isolate the areas of cement grout and joint grouting glue from a water source, avoid the interference of water on repair operation, and ensure the filling strength of the cement grout and the joint grouting glue.
The invention adopts the following technical scheme to realize the purpose:
a repair process for local leakage of an underwater concrete wall comprises the following steps:
s1, a leakage area is defined on the non-water-contact wall surface;
s2, installing a water collecting mechanism at the bottom of the leakage area to seal and fix the water collecting mechanism with the non-water-contact wall surface, wherein the water collecting mechanism is used for separating leakage water flowing downwards along the non-water-contact wall surface and guiding the water to the outside of the wall surface;
s3, fixing a first sealing mechanism on the non-water-contact wall surface around the leakage area, so that the first sealing mechanism is fixed with the non-water-contact wall surface in a sealing manner, and arranging a through hole in the middle of the first sealing mechanism, so that the leakage area and the water collection mechanism are positioned in the through hole;
s4, determining the position of the water guide crack on the water contact wall surface communicated with the leakage area, and converting the position of the water guide crack into a mapping area on the non-water contact wall surface;
s5, mounting a second sealing mechanism in the middle of the mapping area to enable the second sealing mechanism to be fixed with the non-water-contact wall surface in a sealing mode, and forming a through hole in the middle of the second sealing mechanism;
s6, drilling a grouting hole penetrating through the concrete wall through the through hole in the middle of the second sealing mechanism, quickly drawing out the drill bit after the grouting hole is drilled, quickly inserting a grouting pipe internally penetrated with a steel strand into the grouting hole, and sealing and fixing the grouting pipe and the through hole in the middle of the second sealing mechanism;
s7, under the assistance of the underwater high-definition camera, pulling the inner end of the steel strand to the top of the concrete wall, fixing the inner end of the steel strand to the middle of the formwork, connecting the outer end of the steel strand to the waterproof fastener, and then putting the formwork into water to fully buckle the formwork on the water guide crack and the water contact wall around the water guide crack;
s8, tensioning the outer end of the steel strand on one side of the non-water-contact wall surface to enable the formwork to be tightly buckled on the water-contact wall surface, arranging a sealing gasket at the edge of the formwork, and sealing and abutting the edge of the formwork against the water-contact wall surface under the traction of the steel strand to realize the waterproof sealing of the inner cavity of the formwork;
s9, an air inlet pipe is communicated with the upper part of the formwork, a water drainage and air outlet pipe is communicated with the lower part of the formwork, the water drainage and air outlet pipe is used for pumping water and draining water for cracks in the formwork and the concrete wall, when no water can be pumped out, air is fed into the cracks in the formwork and the concrete wall for a long time by using the air inlet pipe and the through hole in the middle of the first sealing mechanism, and the cracks and the surface of the cavity surface are dried as much as possible;
s10, sleeving an annular sealing air bag at the inner end of the grouting pipe, communicating the annular sealing air bag with an air guide pipe penetrating through the grouting hole, and inflating the annular sealing air bag through the air guide pipe to expand the annular sealing air bag so as to seal a gap between the grouting pipe and the grouting hole;
s11, injecting cement slurry into the inner cavity of the formwork through a grouting pipe;
s12, after the cement grout in the inner cavity of the formwork is solidified, pouring joint grouting glue into the gaps between the grouting pipes and the grouting holes and the cracks in the concrete wall, and discharging gas in the annular sealing air bag in the process of pouring the pouring glue;
and S13, after the crack pouring glue is solidified, removing the first sealing mechanism and the second sealing mechanism, cutting off the grouting pipe outside the non-water-contact wall surface, and painting the wall surface to finish repairing of local leakage of the concrete wall.
Optionally, in step S2, the water collecting mechanism includes an arc-shaped or bent water receiving tank, a folded edge is disposed at an inner side edge of the water receiving tank, the folded edge is provided with a plurality of mounting holes, and a sealing gasket is disposed on an inner side surface of the folded edge.
Optionally, the first sealing mechanism in step S3 and the second sealing mechanism in step S5 both include a sealing block, an inner end surface of the sealing block is provided with a concentrically arranged annular partition plate, and the sealing block is further provided with a plurality of mounting holes.
Optionally, in step S4, the method for determining the position of the water guide crack on the water contact wall surface communicating with the leakage area includes:
pressurizing and ventilating the crack through a through hole in the middle of the first sealing mechanism, observing the bubble generation position on the water contact wall surface through an underwater high-definition camera, then lowering a mark post from the wall top to the uppermost position and the lowermost position of the water guide crack, and converting the position into a mapping area on the non-water contact wall surface through distance conversion.
Optionally, in step S4, the method for pressurizing and ventilating the crack through the through hole in the middle of the first sealing mechanism includes:
after the adhesive on the non-water-contact wall surface is cured, taking a first connecting pipe head with external threads and winding a water stop belt on the outer side of the connecting pipe head, screwing the first connecting pipe head and the through hole in the middle of the first sealing mechanism through thread matching, then connecting the first connecting pipe head and the rubber guide pipe through a hoop pipe clamp, and introducing air to the through hole in the middle of the first sealing mechanism through the rubber guide pipe.
Optionally, in step S6, the method for fixedly connecting the grouting pipe and the second sealing mechanism includes:
the second connecting pipe head with the external thread is welded on the grouting pipe, and the second connecting pipe head is connected with the middle part of the second sealing mechanism in a threaded fit mode after the grouting pipe is inserted into the grouting hole.
Optionally, in step S7, the waterproof fastener includes a fastener body, a cavity is provided at an inner end of the fastener body, an outer end of the grouting pipe extends into the cavity of the fastener body and is in threaded connection with an inner wall of the cavity, an outer end of the steel strand penetrates through the cavity of the fastener body and penetrates out from the outer end of the fastener body, and a fastening sleeve is in threaded connection with an outer side of the fastener body;
in step S8, the method for tensioning the outer end of the steel strand includes:
loosening the waterproof fastener, pulling out the surplus part of the steel strand from the grouting pipe and the waterproof fastener, shearing, fixing a second anchorage device at the outer end of the steel strand, enabling the outer end of the fastening sleeve to abut against the second anchorage device, and rotating the fastening sleeve to enable the fastening sleeve to move towards the second anchorage device so as to strain the steel strand outwards.
Optionally, in step S7, the method further includes:
and water-absorbing expansion fibers are filled in the cavity of the fastener body, the water-absorbing expansion fibers in the cavity are gradually compressed by the outer end of the grouting pipe in the process of screwing the outer end of the grouting pipe to the cavity of the fastener body, and water is prevented from flowing out along the steel strand by the water-absorbing expansion fibers.
Optionally, in step S12, the method for injecting the grouting glue into the gap between the grouting pipe and the grouting hole and the crack in the concrete wall includes:
the second connecting pipe head is provided with a first jack and a second jack, the glue filling pipe is inserted into the first jack, and the second jack is used for discharging gas when the crack filling glue is injected;
after the through hole in the middle of the first sealing mechanism is plugged, injecting crack pouring glue into a hole between the grouting pipe and the grouting hole through the grouting pipe; when pouring glue flows out of the second jack, the second jack is blocked, the through hole in the middle of the first sealing mechanism is opened, the pouring glue is continuously injected for a long time through the low pressure of the glue filling pipe, and grouting is stopped when the pouring glue flows out of the through hole in the middle of the first sealing mechanism.
Optionally, in step S2, the installation method of the water collecting mechanism includes:
polishing and leveling non-water-contact wall surfaces around the leakage area to expose the non-water-contact wall surfaces out of a concrete base surface, forming a plurality of small drill holes on the non-water-contact wall surfaces at the bottom of the leakage area for installing a water collection mechanism, forming annular holes on the non-water-contact wall surfaces around the leakage area for inserting annular partition plates of a first sealing mechanism, forming a plurality of large drill holes on the periphery of the annular holes for fixing sealing blocks of the first sealing mechanism, drying the exposed concrete base surface, and cleaning floating dust on the wall surface;
and (4) penetrating the expansion bolt through the mounting hole on the water collection mechanism and then extending the expansion bolt into the small drill hole, and screwing the expansion bolt to fix the water collection mechanism.
In step S3, the first seal mechanism is attached by:
while a small drill hole for installing a water collection mechanism is arranged, an annular hole is arranged on a non-water-contact wall surface around the leakage area for inserting an annular partition plate of a first sealing mechanism, and a plurality of large drill holes are arranged on the periphery of the annular hole for fixing a sealing block of the first sealing mechanism;
after the water catchment mechanism is installed, brushing an adhesive on the polished and leveled concrete base surface and filling the annular hole with the adhesive;
and the expansion bolt penetrates through the mounting hole on the sealing block of the first sealing mechanism and then extends into the large drill hole, the annular partition plate of the first sealing mechanism is inserted into the annular hole, and the expansion bolt is screwed down to extrude the adhesive so as to hermetically fix the first sealing mechanism on the non-water-contact wall surface.
Optionally, in step S5, the second sealing mechanism is mounted by:
an annular hole is formed in the non-water-contact wall surface around the grouting hole and used for inserting an annular partition plate of the second sealing mechanism, a plurality of large drill holes are formed in the periphery of the annular hole and used for fixing a sealing block of the second sealing mechanism, and floating dust on the wall surface is cleaned;
brushing an adhesive on the ground and leveled concrete base surface and filling the annular holes with the adhesive;
and the expansion bolt penetrates through the mounting hole on the sealing block of the second sealing mechanism and then extends into the large drill hole, the annular partition plate of the second sealing mechanism is inserted into the annular hole, and the expansion bolt is screwed down to extrude the adhesive so as to seal and fix the second sealing mechanism on the non-water-contact wall surface.
The beneficial effects of the invention include but are not limited to:
the invention provides a repair process for local leakage of an underwater concrete wall, which realizes the repair process of the local leakage of the concrete wall by the steps of delineating a leakage area on a non-water-contact wall surface, installing a water collection mechanism and a first sealing mechanism, determining a mapping area of a water guide crack on the non-water-contact wall surface, installing a second sealing mechanism, drilling a grouting hole, fixing a formwork on the water guide crack of the water-contact wall surface, pumping water and draining water to the formwork and cracks, injecting cement grout into the formwork, injecting crack pouring glue into the cracks and the like.
In the repairing process, the areas of cement grout and joint grouting glue can be completely isolated from a water source, the interference of water to repairing operation is avoided, the filling strength of the cement grout and the joint grouting glue is ensured, the cavity generated in the pouring area is avoided, and the strength of the repairing position is enhanced. The device used in the repairing process is simple in structure and easy and convenient to operate, and the local leakage of the underwater concrete wall can be conveniently repaired.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic view of a small drilled hole, a large drilled hole and an annular hole drilled in a determined blowby area on a non-water-contacting wall surface;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of a catchment mechanism;
FIG. 4 is a sectional view taken along line B-B of FIG. 3;
FIG. 5 is a top view of FIG. 3;
FIG. 6 is a schematic view of a first sealing mechanism or a second sealing mechanism;
FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;
FIG. 8 is a schematic view of the water collection mechanism and the first sealing mechanism mounted on a non-water-contacting wall surface;
FIG. 9 is a cross-sectional view taken along line D-D of FIG. 8;
FIG. 10 is a schematic view of a water-conducting crack on a water-contacting wall surface;
FIG. 11 is a schematic illustration of the determination of water-conducting cracks on a water-contacting wall surface;
FIG. 12 is a schematic view of a stationary grouting pipe and a stationary formwork;
FIG. 13 is a schematic view of a grout tube and its associated structure;
fig. 14 is a cross-sectional view of a second connector head;
fig. 15 is a side view of a second connector head;
FIG. 16 is a schematic view of the connection of the water-stop fastener to the outer end of the grout pipe;
FIG. 17 is a side view of the water-stop fastener;
FIG. 18 is a schematic view of a formwork;
FIG. 19 is a sectional view taken along line E-E of FIG. 18;
FIG. 20 is a schematic view of a concrete wall after completion of repair of a local leak;
in the figure, 10, the leakage region; 20. a water catchment mechanism; 21. a water receiving tank; 22. folding edges; 23. drilling a hole; 30. a first sealing mechanism; 31. a sealing block; 32. an annular partition plate; 33. an annular aperture; 34. drilling a hole in a large scale; 35. a first connector head; 351. a rubber conduit; 40. an underwater high-definition camera; 50. a second sealing mechanism; 61. steel strand wires; 611. a first anchor; 612. a second anchor; 62. a grouting pipe; 621. an annular sealing air bag; 622. an air duct; 623. a grouting port; 63. a second connector head; 631. filling a rubber pipe; 70. a formwork; 71. an air inlet pipe; 72. a drainage air outlet pipe; 80. a waterproof fastener; 81. a fastener body; 82. fastening the sleeve; 83. water-swellable fibers; 91. cracking; 92. water cracks are guided.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein. Therefore, the scope of the invention is not limited by the specific embodiments disclosed below.
The invention provides a repair process for local leakage of an underwater concrete wall, which comprises the following steps:
s1, a leakage area 10 is defined on the non-water-contact wall surface, as shown in figure 1, the middle circular area is the leakage area 10;
s2, installing the water collecting mechanism 20:
polishing and leveling the non-water-contact wall surface around the leakage area 10 to expose the concrete base surface, as shown in fig. 1 and 2, drilling a plurality of (e.g. 3) small drill holes 23 for installing the water catchment mechanism 20 on the non-water-contact wall surface at the bottom of the leakage area 10 by using a drilling machine; as shown in fig. 3-5, the water collecting mechanism 20 includes an arc-shaped or bent water receiving tank 21, a folded edge 22 is provided at an inner side edge of the water receiving tank 21, a plurality of mounting holes are provided on the folded edge 22, and a sealing gasket is provided on an inner side surface of the folded edge 22;
blowing and polishing residual water on the leveled concrete base surface by using a fan, and cleaning floating dust on the wall surface by using a brush;
as shown in fig. 8 and 9, the expansion bolt passes through the mounting hole on the turned-over edge 22 of the water collection mechanism 20 and then extends into the small drilling hole 23, the expansion bolt is tightened to fix the water collection mechanism 20, so that the water collection mechanism 20 is hermetically fixed with the non-water-contact wall, and the water collection mechanism 20 is used for isolating the leakage water flowing down along the non-water-contact wall and guiding the water out of the wall.
S3, mounting the first seal mechanism 30:
as shown in fig. 6 and 7, the first sealing mechanism 30 includes a sealing block 31, a through hole is formed in the middle of the sealing block 31, a concentrically arranged annular partition plate 32 is disposed on an inner end surface of the sealing block 31, and a plurality of mounting holes are further formed in the sealing block 31;
the first seal mechanism 30 is mounted by:
while a small drilling hole 23 for installing the water collecting mechanism 20 is opened, an annular hole 33 with certain depth and width is drilled on a non-water-contact wall surface around the leakage area 10 by water for inserting an annular partition plate 32 of the first sealing mechanism 30, and a plurality of large drilling holes 34 (for example, 4) are opened on the periphery of the annular hole 33 by a drilling machine for fixing a sealing block 31 of the first sealing mechanism 30;
after the water catchment mechanism 20 is installed, brushing an adhesive on the ground and leveled concrete base surface and filling the annular hole 33 with the adhesive, wherein the adhesive is a high-viscosity epoxy resin adhesive generally;
as shown in fig. 8 and 9, the expansion bolt passes through the mounting hole on the sealing block 31 of the first sealing mechanism 30 and then extends into the large drilling hole 34, the annular partition plate 32 of the first sealing mechanism 30 is inserted into the annular hole 33, the leakage area 10 and the water collection mechanism 20 are positioned in the through hole in the middle of the first sealing mechanism 30, and the expansion bolt is screwed to press the adhesive to hermetically fix the sealing block 31 on the non-water-contact wall surface;
s4, determining the position of the water guide crack 92 on the water contact wall surface communicated with the leakage area 10, and converting the position of the water guide crack 92 to a mapping area on the non-water contact wall surface:
after the adhesive on the non-water-contact wall surface is cured, as shown in fig. 11, taking a first connector head 35 with external threads and winding a water stop tape on the outer side of the connector head, screwing the first connector head 35 and the through hole in the middle of the first sealing mechanism 30 in a threaded fit manner, connecting the first connector head 35 and the rubber conduit 351 by using a hoop pipe clamp, and slowly pressurizing and ventilating the through hole in the middle of the first sealing mechanism 30 through the rubber conduit 351;
as shown in fig. 11, the underwater high-definition camera 40 with the rigid bracket is placed on the concrete wall top, the bubble generation position on the water contact wall surface is observed through the underwater high-definition camera 40 (as shown in fig. 10), then the marker post is placed from the wall top to the uppermost and lowermost positions of the water guide cracks, the position of the water guide crack 92 on the water contact wall surface communicated with the leakage area 10 is obtained, and then the position is converted to the mapping area on the non-water contact wall surface through distance conversion.
S5, installing the second sealing mechanism 50 in the middle of the mapping region:
the second sealing mechanism 50 has the same structure and installation method as the first sealing mechanism 30, and includes a sealing block 31, a through hole is provided in the middle of the annular block 31, an annular partition plate concentrically arranged is provided on the inner end surface of the sealing block 31, and a plurality of installation holes are provided on the sealing block.
The second seal mechanism 50 is mounted by:
an annular hole is formed in the non-water-contact wall surface around the grouting hole and used for inserting an annular partition plate of the second sealing mechanism, and a plurality of large drill holes are formed in the periphery of the annular hole and used for fixing a sealing block of the second sealing mechanism 50;
brushing an adhesive on the ground and leveled concrete base surface and filling the annular holes with the adhesive;
as shown in fig. 12, the expansion bolts are inserted into the large drilled holes through the mounting holes of the seal blocks of the second seal mechanism 50, the annular partition plate of the second seal mechanism 50 is inserted into the annular holes, and the expansion bolts are tightened to press the adhesive to sealingly fix the second seal mechanism 50 to the non-water-contact wall surface.
S6, as shown in fig. 12, drilling a grouting hole through the concrete wall through the through hole in the middle of the second sealing mechanism 50, and quickly pulling out the drill after the grouting hole is drilled, and quickly inserting the grouting pipe 62 with the steel strand 61 inserted therein into the grouting hole; as shown in fig. 13, a second connector head 63 with an external thread is welded on the grouting pipe 62, and after the grouting pipe 62 is inserted into the grouting hole, the second connector head 63 is connected with the middle part of the second sealing mechanism 50 through a thread fit, so that the grouting pipe 62 is sealed and fixed with the through hole in the middle part of the second sealing mechanism 50. The outer end of the grouting pipe 62 is closed and is provided with a through hole for the steel strand 61 to pass through.
S7, with the aid of the underwater high-definition camera 40, as shown in fig. 12, pulling the inner end of the steel strand 61 to the top of the concrete wall with a draw hook, fixing a first anchor 611 with external threads at the inner end of the steel strand 61, connecting the outer end of the steel strand 61 with a waterproof fastener 80, fixedly connecting the first anchor 611 with the threaded hole in the middle of the formwork 70 through thread fit, and then lowering the formwork 70 into the water, so that the formwork 70 is fully buckled on the water guide crack and the surrounding water-contacting wall surface.
As shown in fig. 16 and 17, the waterproof fastener 80 includes a fastener body 81, a cavity is provided at an inner end of the fastener body 81, an outer end of the grouting pipe 62 extends into the cavity of the fastener body 81 and is in threaded connection with an inner wall of the cavity, an outer end of the steel strand 61 passes through the cavity of the fastener body 81 and penetrates out from an outer end of the fastener body 81, and a fastening sleeve 82 is in threaded connection with an outer side of the fastener body 81; the outer end of the fastener body 81 is formed with a separate claw piece, and tightening the fastening sleeve 82 squeezes the steel strand 61 into the fastener body 81.
Furthermore, water-absorbing expansion fibers 83 are filled in the cavity of the fastener body 81, and in the process that the outer end of the grouting pipe 62 is screwed to the cavity of the fastener body 81, the outer end of the grouting pipe 62 gradually compresses the water-absorbing expansion fibers 83 in the cavity, and water is prevented from flowing out along the steel strand 61 by the water-absorbing expansion fibers 83.
S8, loosening the waterproof fastener on one side of the non-water-contact wall surface, pulling out the surplus part of the steel strand 61 from the grouting pipe 62 and the waterproof fastener, shearing the surplus part, and then placing the steel strand 61 at the outer end of the steel strand 61
Fixing a second anchorage device 612, wherein the outer end of the fastening sleeve 82 abuts against the second anchorage device 612, rotating the fastening sleeve 82 to move towards the second anchorage device 612 to draw the steel strand 61 outwards, tensioning the steel strand 61, and fastening the formwork 70 on the water-contact wall surface; the edge of the mould shell 70 is provided with a sealing gasket, and the edge of the mould shell 70 is sealed and propped against the water-contact wall surface under the traction of the steel strand 61, so that the water-proof sealing of the inner cavity of the mould shell 70 is realized.
S9, as shown in fig. 18 and 19, the upper part of the formwork 70 is connected with an air inlet pipe 71, the lower part of the formwork 70 is connected with a water outlet pipe 72, the water outlet pipe 72 is used for pumping water and draining water to the formwork 70 and the cracks 91 in the concrete wall, when no water can be drawn out, the air inlet pipe 71 and the through holes in the middle of the first sealing mechanism 30 are used for long-term air inlet to the formwork 70 and the cracks 91 in the concrete wall, so that the cracks 91 and the cavity surface are as dry as possible;
s10, as shown in FIG. 13, an annular sealing air bag 621 is sleeved at the inner end of the grouting pipe 62, the annular sealing air bag 621 is communicated with an air duct 622 penetrating through the grouting hole, the annular sealing air bag 621 is inflated through the air duct 622, so that the annular sealing air bag 621 is expanded, and a gap between the grouting pipe 62 and the grouting hole is sealed;
s11, a grouting opening 623 is arranged on the grouting pipe 62, cement grout is injected into the inner cavity of the formwork 70 through the grouting pipe 62, and the cement grout is usually expanded polymer cement grout;
s12, after the cement grout in the inner cavity of the formwork 70 is solidified, removing the air inlet pipe 71 and the water and air outlet pipe 72 on the formwork 70, and injecting grouting glue into the hole between the grouting pipe 62 and the grouting hole and the crack in the concrete wall, wherein the concrete method comprises the following steps:
as shown in fig. 14 and 15, a first insertion hole into which a caulking tube 631 is inserted and a second insertion hole for discharging gas when caulking is injected are provided in the second connector head 63;
after the through hole in the middle of the first sealing mechanism 30 is plugged (i.e., the rubber conduit 351 on the first connector head 35 is plugged), pouring sealant is injected into the hole between the grouting pipe 62 and the grouting hole through the sealant pouring pipe, and gas in the annular sealing air bag 621 is discharged in the process of pouring sealant; when pouring glue flows out of the second jack, the second jack is plugged and the third jack which is used for ventilating the annular sealing air bag 621 is opened, the through hole in the middle of the first sealing mechanism 30 is opened (namely the rubber conduit 351 on the first connector head 35 is opened), the pouring glue is continuously injected for a long time through the low pressure of the glue filling pipe, and when the pouring glue flows out of the through hole in the middle of the first sealing mechanism 30, grouting is stopped. Wherein, the joint filling glue is high-fluidity epoxy resin joint filling glue. The surface of the grouting pipe 62 is ribbed, so that the bonding strength with the crack pouring glue can be enhanced.
S13, as shown in fig. 20, after the joint compound is solidified, the first sealing mechanism 30 and the second sealing mechanism 50 are removed, the grouting pipe 62 outside the non-water-contact wall is cut off, and then the wall is painted, so as to complete the repair of the local leakage of the concrete wall.
It should be noted that, in the present invention, the first anchor 611 and the second anchor 612 are commonly used steel strand anchors in the market, and the present invention is not limited to the structure thereof.
In the description of the present invention, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for ease of description and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
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; the connection can be mechanical connection, electrical connection or communication; 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.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (10)
1. A repair process for local leakage of an underwater concrete wall is characterized by comprising the following steps:
s1, a leakage area is defined on the non-water-contact wall surface;
s2, installing a water collecting mechanism at the bottom of the leakage area to seal and fix the water collecting mechanism with the non-water-contact wall surface, wherein the water collecting mechanism is used for separating leakage water flowing downwards along the non-water-contact wall surface and guiding the water to the outside of the wall surface;
s3, fixing a first sealing mechanism on the non-water-contact wall surface around the leakage area, so that the first sealing mechanism is fixed with the non-water-contact wall surface in a sealing manner, and arranging a through hole in the middle of the first sealing mechanism, so that the leakage area and the water collection mechanism are positioned in the through hole;
s4, determining the position of the water guide crack on the water contact wall surface communicated with the leakage area, and converting the position of the water guide crack into a mapping area on the non-water contact wall surface;
s5, mounting a second sealing mechanism in the middle of the mapping area to enable the second sealing mechanism to be fixed with the non-water-contact wall surface in a sealing mode, and forming a through hole in the middle of the second sealing mechanism;
s6, drilling a grouting hole penetrating through the concrete wall through the through hole in the middle of the second sealing mechanism, quickly drawing out the drill bit after the grouting hole is drilled, quickly inserting a grouting pipe internally penetrated with a steel strand into the grouting hole, and sealing and fixing the grouting pipe and the through hole in the middle of the second sealing mechanism;
s7, under the assistance of the underwater high-definition camera, pulling the inner end of the steel strand to the top of the concrete wall, fixing the inner end of the steel strand to the middle of the formwork, connecting the outer end of the steel strand to the waterproof fastener, and then putting the formwork into water to fully buckle the formwork on the water guide crack and the water contact wall around the water guide crack;
s8, tensioning the outer end of the steel strand on one side of the non-water-contact wall surface to enable the formwork to be tightly buckled on the water-contact wall surface, arranging a sealing gasket at the edge of the formwork, and sealing and abutting the edge of the formwork against the water-contact wall surface under the traction of the steel strand to realize the waterproof sealing of the inner cavity of the formwork;
s9, an air inlet pipe is communicated with the upper part of the formwork, a water drainage and air outlet pipe is communicated with the lower part of the formwork, the water drainage and air outlet pipe is used for pumping water and draining water for cracks in the formwork and the concrete wall, when no water can be pumped out, air is fed into the cracks in the formwork and the concrete wall for a long time by using the air inlet pipe and the through hole in the middle of the first sealing mechanism, and the cracks and the surface of the cavity surface are dried as much as possible;
s10, sleeving an annular sealing air bag at the inner end of the grouting pipe, communicating the annular sealing air bag with an air guide pipe penetrating through the grouting hole, and inflating the annular sealing air bag through the air guide pipe to expand the annular sealing air bag so as to seal a gap between the grouting pipe and the grouting hole;
s11, injecting cement slurry into the inner cavity of the formwork through a grouting pipe;
s12, after the cement grout in the inner cavity of the formwork is solidified, pouring joint grouting glue into the gaps between the grouting pipes and the grouting holes and the cracks in the concrete wall, and discharging gas in the annular sealing air bag in the process of pouring the pouring glue;
and S13, after the crack pouring glue is solidified, removing the first sealing mechanism and the second sealing mechanism, cutting off the grouting pipe outside the non-water-contact wall surface, and painting the wall surface to finish repairing of local leakage of the concrete wall.
2. The process of repairing a local leakage in an underwater concrete wall according to claim 1, wherein in step S2, the water collecting mechanism comprises an arc-shaped or bent water receiving tank, a folded edge is disposed at an inner side edge of the water receiving tank, a plurality of mounting holes are disposed on the folded edge, and a sealing gasket is disposed on an inner side surface of the folded edge.
3. The process of repairing local leakage of underwater concrete wall according to claim 1, wherein the first sealing mechanism in step S3 and the second sealing mechanism in step S5 each comprise a sealing block, the inner end surface of the sealing block is provided with concentrically arranged annular partition plates, and the sealing block is further provided with a plurality of mounting holes.
4. The process for repairing a local leakage of an underwater concrete wall according to claim 1, wherein in step S4, the method for determining the position of the water guide crack on the water contact wall surface communicating with the leakage area comprises the following steps:
pressurizing and ventilating the crack through a through hole in the middle of the first sealing mechanism, observing the bubble generation position on the water contact wall surface through an underwater high-definition camera, then lowering a mark post from the wall top to the uppermost position and the lowermost position of the water guide crack, and converting the position into a mapping area on the non-water contact wall surface through distance conversion.
5. The process for repairing a local leakage of an underwater concrete wall according to claim 4, wherein in the step S4, the method for pressurizing and ventilating the crack through the through hole in the middle of the first sealing mechanism comprises the following steps:
after the adhesive on the non-water-contact wall surface is cured, taking a first connecting pipe head with external threads and winding a water stop belt on the outer side of the connecting pipe head, screwing the first connecting pipe head and the through hole in the middle of the first sealing mechanism through thread matching, then connecting the first connecting pipe head and the rubber guide pipe through a hoop pipe clamp, and introducing air to the through hole in the middle of the first sealing mechanism through the rubber guide pipe.
6. The process for repairing a local leakage of an underwater concrete wall according to claim 1, wherein in the step S6, the method for fixedly connecting the grouting pipe and the second sealing mechanism comprises:
the second connecting pipe head with the external thread is welded on the grouting pipe, and the second connecting pipe head is connected with the middle part of the second sealing mechanism in a threaded fit mode after the grouting pipe is inserted into the grouting hole.
7. The process of repairing a local leakage of an underwater concrete wall according to claim 1, wherein in step S7, the waterproof fastener comprises a fastener body, a cavity is formed at an inner end of the fastener body, an outer end of the grouting pipe extends into the cavity of the fastener body and is in threaded connection with an inner wall of the cavity, an outer end of the steel strand penetrates through the cavity of the fastener body and penetrates out from the outer end of the fastener body, and a fastening sleeve is in threaded connection with an outer side of the fastener body;
in step S8, the method for tensioning the outer end of the steel strand includes:
loosening the waterproof fastener, pulling out the surplus part of the steel strand from the grouting pipe and the waterproof fastener, shearing, fixing a second anchorage device at the outer end of the steel strand, enabling the outer end of the fastening sleeve to abut against the second anchorage device, and rotating the fastening sleeve to enable the fastening sleeve to move towards the second anchorage device so as to strain the steel strand outwards.
8. The process for repairing a local leakage in an underwater concrete wall according to claim 7, wherein the step S7 further comprises:
and water-absorbing expansion fibers are filled in the cavity of the fastener body, the water-absorbing expansion fibers in the cavity are gradually compressed by the outer end of the grouting pipe in the process of screwing the outer end of the grouting pipe to the cavity of the fastener body, and water is prevented from flowing out along the steel strand by the water-absorbing expansion fibers.
9. The process for repairing local leakage of underwater concrete wall according to claim 1, wherein in step S12, the method for injecting grouting glue into the gap between grouting pipe and grouting hole and into the crack in concrete wall is:
the second connecting pipe head is provided with a first jack and a second jack, the glue filling pipe is inserted into the first jack, and the second jack is used for discharging gas when the crack filling glue is injected;
after the through hole in the middle of the first sealing mechanism is plugged, injecting crack pouring glue into a hole between the grouting pipe and the grouting hole through the grouting pipe; when pouring glue flows out of the second jack, the second jack is blocked, the through hole in the middle of the first sealing mechanism is opened, the pouring glue is continuously injected for a long time through the low pressure of the glue filling pipe, and grouting is stopped when the pouring glue flows out of the through hole in the middle of the first sealing mechanism.
10. The process for repairing a local leakage of an underwater concrete wall according to claim 3, wherein in the step S2, the installation method of the water collection mechanism comprises the following steps:
polishing and leveling non-water-contact wall surfaces around the leakage area to expose the non-water-contact wall surfaces out of a concrete base surface, forming a plurality of small drill holes on the non-water-contact wall surfaces at the bottom of the leakage area for installing a water collection mechanism, forming annular holes on the non-water-contact wall surfaces around the leakage area for inserting annular partition plates of a first sealing mechanism, forming a plurality of large drill holes on the periphery of the annular holes for fixing sealing blocks of the first sealing mechanism, drying the exposed concrete base surface, and cleaning floating dust on the wall surface;
and (4) penetrating the expansion bolt through the mounting hole on the water collection mechanism and then extending the expansion bolt into the small drill hole, and screwing the expansion bolt to fix the water collection mechanism.
In step S3, the first seal mechanism is attached by:
while a small drill hole for installing a water collection mechanism is arranged, an annular hole is arranged on a non-water-contact wall surface on the periphery of the leakage area for inserting an annular partition plate of a first sealing mechanism, and a plurality of large drill holes are arranged on the periphery of the annular hole for fixing a sealing block of the first sealing mechanism;
after the water catchment mechanism is installed, brushing an adhesive on the polished and leveled concrete base surface and filling the annular hole with the adhesive;
the expansion bolt penetrates through a mounting hole in a sealing block of the first sealing mechanism and then extends into the large drill hole, the annular partition plate of the first sealing mechanism is inserted into the annular hole, and the expansion bolt is screwed down to extrude the adhesive so as to seal and fix the first sealing mechanism on the non-water-contact wall surface;
in step S5, the second seal mechanism is attached by:
an annular hole is formed in the non-water-contact wall surface around the grouting hole and used for inserting an annular partition plate of the second sealing mechanism, a plurality of large drill holes are formed in the periphery of the annular hole and used for fixing a sealing block of the second sealing mechanism, and floating dust on the wall surface is cleaned;
brushing an adhesive on the ground and leveled concrete base surface and filling the annular holes with the adhesive;
and the expansion bolt penetrates through the mounting hole on the sealing block of the second sealing mechanism and then extends into the large drill hole, the annular partition plate of the second sealing mechanism is inserted into the annular hole, and the expansion bolt is screwed down to extrude the adhesive so as to seal and fix the second sealing mechanism on the non-water-contact wall surface.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2814951C1 (en) * | 2023-03-23 | 2024-03-07 | Станислав Юрьевич Перегудов | Method for creating joint seal for temperature and temperature-sedimentation of hydraulic structure |
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| CN202001729U (en) * | 2010-12-09 | 2011-10-05 | 天津市禾厘油气技术有限公司 | Underwater dry type maintenance working chamber for shallow water areas |
| CN104088254A (en) * | 2014-07-11 | 2014-10-08 | 泛华建设集团有限公司 | Leakage repairing device for pressure-bearing reinforced concrete structure and construction method thereof |
| CN109457735A (en) * | 2018-11-16 | 2019-03-12 | 中铁二十三局集团第四工程有限公司 | A kind of concrete wall and the restorative procedure in bottom plate infiltration crack |
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| JPH09189133A (en) * | 1996-01-10 | 1997-07-22 | Alpha Kogyo Kk | Repairing method of concrete wall |
| CN202001729U (en) * | 2010-12-09 | 2011-10-05 | 天津市禾厘油气技术有限公司 | Underwater dry type maintenance working chamber for shallow water areas |
| CN104088254A (en) * | 2014-07-11 | 2014-10-08 | 泛华建设集团有限公司 | Leakage repairing device for pressure-bearing reinforced concrete structure and construction method thereof |
| CN109457735A (en) * | 2018-11-16 | 2019-03-12 | 中铁二十三局集团第四工程有限公司 | A kind of concrete wall and the restorative procedure in bottom plate infiltration crack |
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| RU2814951C1 (en) * | 2023-03-23 | 2024-03-07 | Станислав Юрьевич Перегудов | Method for creating joint seal for temperature and temperature-sedimentation of hydraulic structure |
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