CN113863223B

CN113863223B - Repair process for local leakage of underwater concrete wall

Info

Publication number: CN113863223B
Application number: CN202111197449.8A
Authority: CN
Inventors: 安雪蕾; 陆海玉; 张志阔; 刘猛; 宋金平; 王其超; 贾连杰; 黄旭; 张祥星; 宋海波; 王淼; 章思亮
Original assignee: Shandong Survey and Design Institute of Water Conservancy Co Ltd
Current assignee: Shandong Survey and Design Institute of Water Conservancy Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2023-03-14
Anticipated expiration: 2041-10-14
Also published as: CN113863223A

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 the cement grout and the 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 cavities from being generated in the pouring area and enhance the strength of the 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

Repair process for local leakage of underwater concrete wall

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 knowledge of the inventors, and does not necessarily constitute a 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 a non-water-contact wall surface;

s2, mounting a water collection mechanism at the bottom of the leakage area, and sealing and fixing the water collection mechanism with the non-water-contact wall surface, wherein the water collection mechanism is used for separating the 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 a 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 catchment 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, so that the second sealing mechanism is fixed with the non-water-contact wall surface in a sealing manner, and a through hole is formed 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 through, quickly inserting a grouting pipe internally penetrated with the 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 an 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 with the middle part of the formwork, connecting the outer end of the steel strand with a waterproof fastener, and then putting the formwork into water to fully buckle the formwork on the water guide crack and the water contact wall surface 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 water-proof 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 to cracks in the formwork and the concrete wall, and when water does not exist and can be drawn out, air is introduced into the cracks in the formwork and the concrete wall for a long time by using the air inlet pipe and the through holes in the middle of the first sealing mechanism, so that 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 an inner cavity of the formwork through a grouting pipe;

s12, after the cement grout in the inner cavity of the formwork is solidified, pouring a pouring sealant into the hole between the grouting pipe and the grouting hole and the crack in the concrete wall, and discharging gas in the annular sealing air bag in the pouring sealant injecting process;

and S13, after the crack pouring glue is solidified, removing the first sealing mechanism and the second sealing mechanism, simultaneously cutting off the grouting pipe outside the non-water-contact wall surface, and then painting the wall surface, so that the repair of the local leakage of the concrete wall can be completed.

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, 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.

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 communicated 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 of 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 first connecting pipe head, screwing the first connecting pipe head and the through hole in the middle of the first sealing mechanism through threaded fit, then connecting the first connecting pipe head with the rubber guide pipe through the 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 slip casting pipe is welded with a second connector head with an external thread, and the second connector head is connected with the middle part of the second sealing mechanism in a threaded matching manner after the slip casting pipe is inserted into the slip casting 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 the step S8, the method for tensioning the outer end of the steel strand comprises the following steps:

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, and the outer end of the grouting pipe gradually compresses the water-absorbing expansion fibers in the cavity in the process of screwing the outer end of the grouting pipe to the cavity of the fastener body, so that 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 crack pouring glue into the gap between the grouting pipe and the grouting hole and the crack in the concrete wall includes:

a first jack and a second jack are arranged on the second connecting pipe head, a glue filling pipe is inserted into the first jack, and the second jack is used for discharging gas when the glue filling pipe is filled;

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 is as follows:

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 sealing mechanism is mounted 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 mounting method of the second sealing mechanism includes:

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, 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, installing a second sealing mechanism, drilling a grouting hole, fixing a formwork on the water guide crack joint of the water-contact wall, pumping water and draining water to the formwork and the crack, injecting cement slurry into the formwork, injecting crack pouring glue into the crack 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 seepage area on a non-water-contact wall surface;

FIG. 2 isbase:Sub>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 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 mold shell;

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 riser fastener to the outer end of the grout pipe;

FIG. 17 is a side view of the water-stop fastener;

FIG. 18 shows 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. turning over the edges; 23. drilling a hole; 30. a first sealing mechanism; 31. a sealing block; 32. an annular partition plate; 33. an annular hole; 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. grouting pipes; 621. An annular sealing air bag; 622. an air duct; 623. a grouting port; 63. a second connector head; 631. pouring a rubber tube; 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 present invention will be explained in detail by the following embodiments and 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, defining a leakage area 10 on a non-water-contact wall surface, wherein as shown in a figure 1, a middle circular area is the leakage area 10;

s2, installing a 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 fig. 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, installing the first sealing 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 the small drill holes 23 for installing the water collecting mechanism 20 are opened, the annular hole 33 with certain depth and width is drilled on the non-water-contact wall surface around the leakage area 10 by water for inserting the annular partition plate 32 of the first sealing mechanism 30, and a plurality of large drill holes 34 (for example, 4) are opened on the periphery of the annular hole 33 by a drilling machine for fixing the sealing blocks 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 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 into 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, mounting a second sealing mechanism 50 in the middle of the mapping area:

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 sealing blocks of the second sealing mechanism 50;

as shown in fig. 12, the expansion bolt is inserted into the large bore hole through the mounting hole of the seal block of the second seal mechanism 50, the annular partition of the second seal mechanism 50 is inserted into the annular hole, and the expansion bolt is tightened to press the adhesive to sealingly fix the second seal mechanism 50 to the non-water-contacting wall surface.

S6, as shown in figure 12, drilling a grouting hole penetrating through the concrete wall through the through hole in the middle of the second sealing mechanism 50, quickly drawing out the drill bit after the grouting hole is drilled, and quickly inserting the grouting pipe 62 internally provided with the steel strand 61 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 by using 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 a threaded hole in the middle of the formwork 70 in a threaded fit manner, and then lowering the formwork 70 into the water, so that the formwork 70 is fully buckled on the water guide cracks and the surrounding water contact 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 strands 61 by the water-absorbing expansion fibers 83.

And S8, loosening the waterproof fastening piece 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 fastening piece, and shearing the surplus part to be arranged 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, an air inlet pipe 71 is communicated with the upper part of the formwork 70, a water drainage and air outlet pipe 72 is communicated with the lower part of the formwork 70, the formwork 70 and cracks 91 in the concrete wall are pumped and drained by utilizing the water drainage and air outlet pipe 72, when no water can be drawn out, air is fed into the formwork 70 and the cracks 91 in the concrete wall for a long time by utilizing the air inlet pipe 71 and the through holes in the middle of the first sealing mechanism 30, and the cracks 91 and the cavity surface are dried as much 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 guide pipe 622 penetrating through a grouting hole, the annular sealing air bag 621 is inflated through the air guide pipe 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 usually adopts 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 drainage 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 figure 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 surface is cut off, and then the wall surface is coated, so that the repair of the local leakage of the concrete wall can be completed.

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 details of the present invention are not described in detail, but are known to those skilled in the art.

Claims

1. A repair process for local leakage of an underwater concrete wall is characterized by comprising the following steps:

s1, defining a leakage area on a non-water-contact wall surface;

s2, mounting a water collecting mechanism at the bottom of the leakage area, sealing and fixing 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;

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;

s10, sleeving an annular sealing air bag at the inner end of the grouting pipe, wherein the annular sealing air bag is communicated 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;

s12, after the cement grout in the inner cavity of the formwork is solidified, pouring joint pouring 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 pouring glue pouring process;

s13, after the crack pouring glue is solidified, the first sealing mechanism and the second sealing mechanism are removed, meanwhile, the grouting pipe outside the non-water-contact wall surface is cut off, and then the wall surface is coated, so that repairing of local leakage of the concrete wall can be completed.

2. The process of repairing a local leakage of 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 provided at an inner side edge of the water receiving tank, a plurality of mounting holes are provided on the folded edge, and a sealing gasket is provided on an inner side surface of the folded edge.

3. The process for repairing the local leakage of the underwater concrete wall according to claim 1, wherein the first sealing mechanism in the step S3 and the second sealing mechanism in the step S5 both comprise sealing blocks, the inner end surfaces of the sealing blocks are provided with annular partition plates which are concentrically arranged, and the sealing blocks are further provided with a plurality of mounting holes.

4. The process for repairing the local leakage of the underwater concrete wall according to claim 1, wherein in the step S4, the method for determining the position of the water guide crack on the water contact wall surface communicated 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 top of the wall 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 the local leakage of the 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 an adhesive used for fixing the first sealing mechanism on the non-water-contact wall surface is cured, a first connecting pipe head with external threads is taken, a water stop belt is wound on the outer side of the connecting pipe head, the first connecting pipe head and a through hole in the middle of the first sealing mechanism are screwed through thread matching, then the first connecting pipe head and a rubber pipe are connected through a hoop pipe clamp, and air is introduced into the through hole in the middle of the first sealing mechanism through the rubber pipe.

6. The process for repairing the local leakage of the 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 following steps:

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 for repairing the local leakage of the underwater concrete wall according to claim 1, wherein in the step S7, the waterproof fastener comprises a fastener body, a cavity is formed in the inner end of the fastener body, the outer end of the grouting pipe extends into the cavity of the fastener body and is in threaded connection with the inner wall of the cavity, the 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 the outer side of the fastener body;

in step S8, the method for tensioning the outer end of the steel strand comprises the following steps:

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 anchor at the outer end of the steel strand, abutting the outer end of the fastening sleeve against the second anchor, and rotating the fastening sleeve to move towards the second anchor so as to strain the steel strand outwards.

8. The process of repairing local leakage of underwater concrete wall according to claim 7, wherein in step S7, further comprising:

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 repairing process for local leakage of underwater concrete wall according to claim 6, wherein in step S12, the method for injecting the grouting glue into the hole between the grouting pipe and the grouting hole and the crack in the concrete wall comprises:

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 sealant flows out of the second jack, the second jack is plugged, the through hole in the middle of the first sealing mechanism is opened, the pouring sealant is continuously injected for a long time through the low pressure of the sealant filling pipe, and grouting is stopped when the pouring sealant flows out of the through hole in the middle of the first sealing mechanism.

10. The process for repairing the local leakage of the 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 a non-water-contact wall surface around a leakage area to expose the non-water-contact wall surface out of a concrete base surface, forming a plurality of small drill holes on the non-water-contact wall surface at the bottom of the leakage area for installing a water collection mechanism, forming annular holes on the non-water-contact wall surface 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;

the expansion bolt penetrates through the mounting hole in the water collection mechanism and then extends into the small drill hole, and the expansion bolt is screwed down to fix the water collection mechanism;

in step S3, the first sealing mechanism is mounted 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;

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 sealing mechanism is mounted by: