CN115323990A - UHPC (ultra high performance polycarbonate) plate-based deep-water dam leakage disease plugging equipment and method - Google Patents

Abstract

The invention discloses a deep water dam leakage disease plugging device based on UHPC sheet material, comprising: splicing UHPC plates, freely splicing a plurality of UHPC plate units according to the detection data of the leakage point of the deep-water dam to form a spliced UHPC plate capable of covering the leakage point, wherein the formed spliced UHPC plate is a spliced UHPC plate with a regular shape or a spliced UHPC plate with an irregular shape; when the spliced UHPC plate is conveyed to a leakage point position for fixing, the leakage point position can be sealed; and the grouting device is used for grouting and filling the leakage point positions through grouting holes in the spliced UHPC board, so that the leakage point positions are sealed and then blocked. The invention also provides a method for plugging the leakage disease of the deep-water dam based on the UHPC sheet material. The invention can rapidly plug the serious leakage disease formed after the disaster of the dam under 300 meters of water, and realize the rapid repair of the leakage disease under the action of high water head and high water pressure.

Description

UHPC (ultra high performance polycarbonate) plate-based deep-water dam leakage disease plugging equipment and method

Technical Field

The invention relates to the field of dam leakage repair. More specifically, the invention relates to a deepwater dam leakage disease plugging device based on UHPC plates and a method thereof.

Background

According to the data, the number of dams with more than 200 meters in the world is 51, wherein 23 dams are occupied in China, and the number of dams with more than 100 meters and more than 200 meters in China is the first in the world. The high dam construction level of China is leading in the world, but 80% of dams are built in 50-70 years, underwater operation and maintenance equipment is relatively lagged, and the leakage diseases of the underwater dams are prominent. The main causes of leakage diseases are material aging, earthquake, geological and flood disasters, quality defects and the like which cause the collapse of the lower part of the panel, thereby generating dense through cracks and water stop pull cracks at the periphery.

Data research shows that the prior leakage repairing method aims at the water depth within 100 meters and has small holes and cracks, and the prior leakage treatment adopts measures of pouring water plugging material for reducing leakage, filling cracks with underwater rapid sealing material, grouting and filling bedding material, flexibly sealing the surface of a panel and the like for centralized leakage points.

Referring to related data, patents related to dam seepage-proofing and leakage-repairing respectively comprise a dam concrete seepage-proofing panel seepage underwater repair combined structure (Changsha Pusho Biochemical technology Co., ltd.; changsha university), "reservoir dam seepage underwater unmanned plugging construction process (Kunming survey design research institute Co., ltd., china Electricity construction group), a panel rock-fill dam underwater leakage-stopping structure system (Changsha university)," a roller compacted concrete dam through crack treatment method "(eleven engineering Co., ltd., china Electricity construction), and" a concrete dam seepage-proofing and reinforcing flexible fiber composite sheet "(China Water conservancy and hydropower science research institute). The patent has the defects that the flexible plate is blocked, the crack is blocked by grouting, and a quick repairing method suitable for different leakage diseases of 300-meter water depth is not available.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.

The invention also aims to provide the deep-water dam leakage disease plugging equipment based on the UHPC sheet material, which can rapidly plug serious leakage diseases formed after a disaster on a 300-meter underwater dam and realize rapid repair of the leakage diseases under the action of high water depth and high water pressure.

The invention also aims to improve the plugging efficiency and obtain the best plugging and repairing effect by the method for plugging the leakage disease of the deep-water dam based on the UHPC plate unit.

To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided in a first aspect a deep water dam leakage damage blocking apparatus based on UHPC sheet material, comprising:

splicing UHPC plates, splicing a plurality of UHPC plate units according to detection data of leakage points of the deep-water dam to form a spliced UHPC plate capable of covering the leakage points, wherein the formed spliced UHPC plate is a spliced UHPC plate with a regular shape or a spliced UHPC plate with an irregular shape; the spliced UHPC sheet is conveyed to the leakage point position and fixed on a dam surface, and a water blocking surface can be formed to seal the leakage point position;

and the grouting device is used for grouting and filling the leakage point positions through the grouting holes in the spliced UHPC plate so as to realize the plugging-up and plugging-down of the leakage point positions.

Preferably, the deepwater dam leakage disease plugging equipment based on the UHPC sheet material comprises the UHPC sheet material unit which specifically comprises: the angle steel frame is a square frame formed by encircling four angle steels, a longitudinal and transverse reinforcing bar net is arranged in the angle steel frame, and UHPC (ultra high performance concrete) is poured on the reinforcing bar net; the periphery of each UHPC plate unit is provided with a square annular sealing rubber ring with an L-shaped cross section, the sealing rubber ring is sleeved on the UHPC plate unit, and the bottom of the sealing rubber ring is provided with a plurality of rings of micro-pits so as to increase the adsorbability of the dam face of the leakage point; the UHPC plate unit is made of materials which comprise, by mass, 20% of sulpho-aluminum cement, 60% of ordinary cement, 20% of ground cement and 1% of steel fibers, wherein the water-to-glue ratio is 0.18, and the glue concentration ratio is 1.1.

Preferably, the deepwater dam leakage disease plugging equipment based on the UHPC board further comprises a skirt belt, if the dam face of the leakage point of the deepwater dam is not flat, the skirt belt is arranged around the spliced UHPC board, and when the spliced UHPC board is conveyed to the leakage point and fixed, the skirt belt is attached to the uneven dam face around the leakage point under the adsorption action of negative pressure so as to be capable of completely closing the leakage point.

Preferably, the leakage disease plugging equipment for the deep water dam based on the UHPC boards has the specific setting mode that a plurality of UHPC board units are freely spliced to form a spliced UHPC board capable of covering leakage points: the angle steel frame of each UHPC plate unit is provided with a bolt hole, two adjacent UHPC plate units are fixedly connected through the bolt holes, and the vertical part of the sealing rubber ring is clamped between the bolt holes, wherein each UHPC plate unit is provided with a grouting hole and a grout outlet, so that the grouting device can perform grouting filling through the grouting holes in one UHPC plate unit, or perform grouting filling through a plurality of grouting holes in a plurality of UHPC plate units, or perform grouting filling through all the grouting holes in all the UHPC plate units.

Preferably, the deepwater dam leakage disease plugging equipment based on the UHPC plate is further provided with a fixing device which is a plurality of fixed angle steels arranged around the spliced UHPC plate, one steel plate of the fixed angle steels is fixed on the spliced UHPC plate, the other steel plate of the fixed angle steels is fixed on the dam face, and if the dam face is uneven, the length of the other steel plate is adjusted according to the contact length of the skirting strip and the dam face, so that the end of the other steel plate exceeds the end of the arranged skirting strip, and then the steel plate is fixed on the dam face through a long bolt.

Preferably, the deepwater dam leakage disease plugging device based on the UHPC board further comprises an underwater robot, the underwater robot is used for detecting leakage points and determining the depth, the type and the dam surface flatness of the leakage points according to detection data, the spliced UHPC board is sent to the leakage points through the underwater robot, an iron block is installed in the center of each UHPC board unit, and the iron block is fixedly connected with reinforcing steel bars in the UHPC board units and extends out of the surfaces of the UHPC board units, so that the underwater robot can be installed in a magnetic attraction manner.

Preferably, the leakage point type of the deep-water dam based on the UHPC board comprises a single leakage channel, and the diameter range of the leakage point type is 0-30 cm; the leakage is long and the crack is wide, and the range of the crack width is 5-10 cm; or a plurality of concentrated leakage points with larger areas; wherein the leakage point of the deep water dam is at the depth of 300 meters under the conditions of 3MPa water pressure and 2m/s flow speed; the dam surface flatness comprises basic flatness and unevenness, the concave-convex degree of the basic flatness is 2-3 cm, and the uneven concave-convex degree is 7-8 cm; the grouting filling material is a micro-expansion grouting material which is quickly hardened and cured at a low temperature, the side length of a square frame of the angle steel frame is 50cm, the height of the square frame of the angle steel frame is 10cm, the distance between the arranged longitudinal and transverse reinforcing steel meshes is 10cm, and the thickness of concrete poured by the UHPC plate unit is 6cm.

Preferably, the deepwater dam leakage disease plugging equipment based on the UHPC board comprises the following arrangement modes: if a single UHPC plate unit is used, the skirt belt is in a cylindrical shape with a small upper part and a big lower part, and is sleeved on the periphery of the UHPC plate unit; if the split joint UHPC plate is a plurality of split joint UHPC plates, the skirting strip is formed by split joint UHPC plates surrounded by a plurality of single skirting strips.

Preferably, the deepwater dam leakage disease plugging equipment based on the UHPC board has the advantages that the contact length of the skirt strip and the dam face is 20cm, the length of a gap between the skirt strip and the dam face is 5cm, the sticking length of the skirt strip and the spliced UHPC board is 15cm, and the thickness of the skirt strip is 2mm; the inclination is cut to monolithic skirt area is 55 degrees, pastes the connection in the place of two skirt areas alternately overlapping 20 degrees angles, the material of skirt area is natural rubber.

In a second aspect, the invention provides a method for plugging a leakage disease of a deep-water dam based on a UHPC (ultra high performance polycarbonate) sheet material, which is applied to equipment for plugging the leakage disease of the deep-water dam based on the UHPC sheet material, and comprises the following steps:

the underwater robot detects the leakage point position, and a plurality of UHPC plate units are spliced according to the detection data to form a spliced UHPC plate capable of covering the leakage point position;

if the dam surface is not flat, arranging a skirt strip around the spliced UHPC plate;

if the leakage area is large and the flow rate is high, filling the leakage point position with a plugging material by a riprap method, and reducing the flow rate, wherein the plugging material has the same volume weight as water and expands when meeting water, so that the spliced UHPC board is convenient to approach the leakage point position;

the spliced UHPC board is adsorbed at the leakage point position by the aid of an underwater robot and is fixed, if the skirt belt is arranged, the skirt belt is rolled up in the process of lowering the spliced UHPC board, and when the distance between the skirt belt and the leakage point position is 45-55 cm, the underwater robot cuts off the rolled hanging rope to enable the skirt belt to gradually open and adsorb the dam face in the process of approaching the dam face;

and butting a grouting device with the grouting holes in the spliced UHPC plate, grouting the leakage points, and finishing grouting after the grout outlet holes in the spliced UHPC plate discharge the grout, thereby realizing the plugging after the sealing of the leakage points.

The invention at least comprises the following beneficial effects:

1. the strategy adopted by the invention for the leakage point of the deepwater dam is to seal and then block, firstly, the spliced UHPC board is conveyed to the leakage point and is fixed, namely, the UHPC board is fixedly spliced on the upstream surface of the dam to form a water blocking surface, the water pressure, the flow rate and the flow inside a leakage point channel are reduced, and then, the leakage point channel is grouted and sealed.

2. According to the UHPC plate unit, UHPC concrete and the surrounding angle steel are combined to form a combined structure, the surrounding angle steel provides powerful constraint for the central concrete under the action of pressure, and the concrete deforms transversely to obtain effective limitation of the angle steel. In addition, the bidirectional longitudinal and transverse reinforcing mesh and the angle steel are fixed into an integral frame, so that the performance of three materials of the combined structure is fully exerted, and the bearing capacity of the plate is greatly improved. The spliced UHPC board adopted by the invention is spliced according to the detection data of the leakage points of the deep-water dam, and the leakage type of the leakage points can be judged according to the data collected by the robot, namely the leakage channel with large leakage points, a plurality of concentrated leakage points with large area or a long leakage wide crack with large area, so that a plurality of UHPC board units can be freely spliced through the bolt holes arranged on the angle steel according to the detection data, and the leakage points can be covered by the UHPC board units, therefore, the spliced UHPC board can adapt to different leakage disease scenes.

3. The skirt belt provided by the invention is applied to the condition that the dam surface is not flat. If the dam face is basically flat, a skirt band does not need to be arranged, the UHPC plate unit can be sealed by the rubber sealing strip, and the UHPC plate unit can generate large adsorption force with the flat dam face under the pressure of 3Mpa by the aid of the micro pits arranged at the bottom of the sealing rubber ring. When the dam face is uneven and the rubber sealing strips arranged on the spliced UHPC board are not enough to completely seal the dam face, skirts need to be arranged around the spliced UHPC board and are attached to the dam face with unevenness around the leakage point under the adsorption action of negative pressure so as to completely seal the leakage point.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a leakage disease plugging device for a deep-water dam based on UHPC sheet material in one embodiment of the invention;

FIG. 2 is a schematic structural diagram of a top view of a deep water dam leakage disease plugging device based on UHPC sheet material in one embodiment of the invention;

FIG. 3 is a schematic cross-sectional view of a UHPC sheet unit in accordance with one embodiment of the present invention;

FIG. 4 is a schematic view of a splice structure for splicing UHPC sheets in one embodiment of the present invention;

FIG. 5 is a schematic view of a sealing rubber ring according to an embodiment of the present invention;

FIG. 6 is a schematic bottom view of a rubber gasket according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a spliced UHPC sheet material according to one embodiment of the invention;

fig. 8 is a schematic view of the structure of a crossbar reinforcement mesh in an embodiment of the present invention;

FIG. 9 is a graph of the water-to-gel ratio test results for UHPC sheet material units in accordance with one embodiment of the present invention;

FIG. 10 is a graph of the results of a UHPC sheet cell tensile strength test in accordance with an embodiment of the present invention;

FIG. 11 is a graph showing the water-to-gel ratio test results for UHPC board units in accordance with one embodiment of the present invention;

fig. 12 is a graph showing the water-to-gel ratio test results for UHPC board units in an embodiment of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1 to 7, the invention provides a deepwater dam leakage disease plugging device based on UHPC sheet material, comprising: splicing UHPC plates, splicing a plurality of UHPC plate units 1 according to the detection data of the leakage point of the deep-water dam to form a spliced UHPC plate capable of covering the leakage point, wherein the formed spliced UHPC plate is a spliced UHPC plate with a regular shape or a spliced UHPC plate with an irregular shape as shown in figure 7; when the spliced UHPC plate is conveyed to the leakage point position for fixing, a water blocking surface can be formed, and the leakage point position is sealed; and the grouting device is used for grouting and filling the leakage point positions through the grouting holes in the spliced UHPC plate so as to realize the plugging-up and plugging-down of the leakage point positions.

The deepwater dam leakage disease is an underwater leakage environment with the water depth of 300 meters, the low temperature, the water pressure of 3Mpa and the flow speed of 2m/s being large.

In the embodiment, the leakage point of the deepwater dam is sealed and then blocked, the spliced UHPC board is conveyed to the leakage point and is fixed, namely the UHPC board is fixedly spliced on the upstream surface of the dam to form a water blocking surface, the water pressure, the flow speed and the flow inside the leakage point channel are reduced, and then the leakage point channel is grouted for sealing. It should be noted that, in a high water depth dam, especially a dam with a water depth of 300 meters, under the conditions of high water pressure of 3Mpa and high flow rate of 2m/s, the flexible sheet material in the prior art is adopted for plugging or grouting and plugging cracks, which is completely unsuitable.

The grouting device adopts onshore pump injection, a conveying pipeline of the grouting device is connected with a grouting hole in the spliced UHPC board, grouting materials are pumped into a leakage point channel, a grout outlet is formed in the spliced UHPC board, and the grouting materials can overflow through the grout outlet after the leakage point channel is filled with grouting, and the overflowing grouting materials are received by an underwater robot. The grouting material adopted by the embodiment of the invention is a low-temperature rapid hardening and curing micro-expansion grouting material, preferably: the grouting material is composed of a composition A and a composition B according to a mass ratio of 3-5, wherein the composition A is composed of water, cement, a retarder, a water reducing agent, a flocculating agent, sand and stones; the component B is composed of water, quartz sand, fly ash, aluminum sulfate and lithium carbonate.

In one specific embodiment, the UHPC board-based deep-water dam leakage disease plugging device specifically includes: the angle steel frame 2 is a square frame formed by surrounding four angle steels, a longitudinal and transverse reinforcing mesh 7 is arranged in the angle steel frame 2, as shown in fig. 8, and UHPC ultrahigh-performance concrete is poured on the reinforcing mesh 7; the method comprises the following steps of arranging a square annular sealing rubber ring 3 with an L-shaped cross section around each UHPC plate unit 1, sleeving the sealing rubber ring 3 on the UHPC plate unit 1, arranging a plurality of circles of micro-pits 9 at the bottom of the sealing rubber ring 3 so as to increase the adsorbability of a dam face of a leakage point and the sealing performance of the leakage point, wherein the material for manufacturing the UHPC plate unit 1 preferably comprises 20% of sulpho-aluminum cement, 60% of ordinary cement, 20% of ground cement and 1% of steel fibers by mass, the water-to-gel ratio is 0.18, and the gel concentration ratio is 1.1. And reserving grouting holes and slurry outlet holes on the UHPC plate unit 1.

Wherein, splice the splice UHPC panel concrete setting mode that forms the concatenation UHPC panel that can cover the seepage position to polylith UHPC panel unit 1 and do: the angle steel frame 2 of each UHPC plate unit 1 is provided with a bolt hole 6, two adjacent UHPC plate units are fixedly connected through a splicing bolt 8, the vertical part of the sealing rubber ring 3 is clamped in the middle, and each UHPC plate unit is provided with a grouting hole and a grout outlet, so that the grouting device can perform grouting filling through the grouting holes in one UHPC plate unit, or perform grouting filling through a plurality of grouting holes in a plurality of UHPC plate units, or perform grouting filling through all the grouting holes in all the UHPC plate units.

It should be noted that, the sealing rubber ring is L-shaped, so the thickness of the portion at the bottom end is generally greater than the thickness of the vertical portion. When the underwater robot assisted grouting device performs grouting on leakage point positions, after each UHPC board unit in spliced UHPC boards is tightly attached to a dam face, the space formed by two adjacent UHPC board units and a leaked crack may or may not be communicated, so that grouting holes in part of the UHPC board units can be selectively grouted according to disease conditions during grouting, grouting holes in all the UHPC board units can also be grouted, and grouting filling can be performed on all the cracks.

In the above embodiment, the UHPC concrete and the peripheral angle steel are combined to form a combined structure, and under the action of pressure, the peripheral angle steel provides strong constraint for the central concrete, and the transverse deformation of the concrete is effectively limited by the angle steel. In addition, the bidirectional longitudinal and transverse reinforcing mesh and the angle steel are fixed into an integral frame, so that the performance of three materials of the combined structure is fully exerted, and the bearing capacity of the plate is greatly improved. During specific implementation, inequilateral angle steel Q235 is selected, the size is 100 multiplied by 63 multiplied by 7mm, flat splicing hole bolts are reserved as many as possible to achieve free splicing, bolt hole arrangement is carried out according to construction requirements, bolt shearing force is calculated when plates are spliced and hoisted, and the safety coefficient is 2.5. Test tests and finite element calculation show that the deformation of the UHPC concrete at the center can be effectively limited by the arrangement of the angle steel, and the compression-resistant bearing capacity is improved by 2 times. In the material for manufacturing the UHPC board unit in this example, the mix proportion test is shown in table one, the water-to-glue ratio test result is shown in fig. 9, the steel fiber content is suitably and preferably 1%, the 28-day compressive strength reaches 122.3MPa, the split tensile strength is 10.8MPa, and the tensile strength test result is shown in fig. 10, which all meet the UHPC design requirements of the board.

Watch 1

In one embodiment, as shown in fig. 1, the deepwater dam leakage damage plugging device based on the UHPC board further comprises a skirt belt 4, wherein if the dam surface of a leakage point of the deepwater dam is uneven, the skirt belt 4 is arranged around the spliced UHPC board, and when the spliced UHPC board is conveyed to the leakage point and is fixed, the skirt belt is attached to the uneven dam surface around the leakage point under the adsorption effect of negative pressure so as to completely close the leakage point.

Wherein, the skirt strip 4 is arranged in the following way: if a single UHPC plate unit 1 is used, the skirt belt is in a cylindrical shape with a small upper part and a big lower part and is sleeved on the periphery of the UHPC plate unit; if the skirting strip is a spliced UHPC plate with a plurality of spliced skirting strips, the skirting strip 4 is formed by splicing the UHPC plate surrounded by a plurality of single skirting strips. The contact length of the skirt strip and the dam face is 20cm, the length of a gap between the skirt strip and the dam face is 5cm, the pasting fixed length of the skirt strip and the spliced UHPC board is 15cm, and the thickness of the skirt strip is 2mm; inclination is cut to monolithic skirt area is 55 degrees, pastes the connection in the place of two skirt areas alternately overlapping 20 degrees angles to fix through the bolt, the material of skirt area is natural rubber.

In the above embodiment, when the skirts are provided, if the skirts are formed by joining a plurality of single skirts to surround a UHPC board, the two skirts are always overlapped at a corner, and the single skirts are normally 45 degrees, and if the overlapping between the two skirts is considered, the cutting angle of the single skirts is preferably 55 degrees, and an inclination angle of 10 degrees is increased, and the skirts are attached at an angle of 20 degrees of the overlapped part. In the above embodiments, the given data are preferred, but not limited to the values given in the examples of the present invention.

It should be noted that fig. 1 and fig. 2 are schematic structural diagrams of a single UHPC board unit with skirts arranged around the periphery thereof, and a single board may be formed by surrounding a cylindrical skirt with a small upper part and a large lower part or four skirts. If a plurality of plates are spliced to form a spliced UHPC plate, as shown in FIG. 7, a plurality of skirting strips are generally used for surrounding.

In one embodiment, the deepwater dam leakage disease plugging device based on the UHPC sheet material is further provided with a fixing device 5 which is a plurality of fixed angle steels arranged around the spliced UHPC sheet material, one steel plate of each fixed angle steel is fixed on the spliced UHPC sheet material, the other steel plate of each fixed angle steel is fixed on the dam face, and if the dam face is uneven, the length of the other steel plate is adjusted according to the contact length of the apron belt and the dam face, so that the end of the other steel plate exceeds the end of the arranged apron belt, and then the steel plate is fixed on the dam face through a long bolt 7.

In the above embodiment, although the fixing device is angle steel for the skirt band and the skirt band, the length of the angle steel is different when the skirt band is installed, and it is necessary to be specifically limited according to actual circumstances. The number of the set fixed angle steels is not specifically limited in the embodiment of the invention, and can be limited according to actual needs.

In a specific embodiment, the deepwater dam leakage disease plugging device based on the UHPC board further comprises an underwater robot, the underwater robot is used for detecting leakage points and determining the depth, the type and the surface flatness of the leakage points according to detection data, the spliced UHPC board is sent to the leakage points through the underwater robot, an iron block is installed in the center of each UHPC board unit, and the iron block is fixedly connected with reinforcing steel bars in the UHPC board units and extends out of the surfaces of the UHPC board units, so that the underwater robot can be magnetically attracted, grabbed and installed.

The type of the leakage point of the deep-water dam comprises a single leakage channel, and the diameter range of the leakage channel is 0-30 cm; the leakage is long and the crack is wide, and the range of the crack width is 5-10 cm; or a plurality of concentrated leakage points with larger areas; the leakage point of the deepwater dam is at the depth of 300 meters under the conditions of 3MPa water pressure and 2m/s flow speed; the dam surface flatness comprises basic flatness and unevenness, the basic flatness unevenness is 2-3 cm, the unevenness is 7-8 cm, the side length of a square frame of an angle steel frame is 50cm, the height of the square frame of the angle steel frame is 10cm, the distance between the arranged longitudinal and transverse reinforcing steel bar nets is 10cm, and the thickness of concrete poured by the UHPC plate unit is 6cm.

In the embodiment, the underwater robot not only performs data detection on the leakage point before repair, but also sends the well spliced UHPC plate unit to the leakage point, the UHPC plate is spliced and adsorbed at the leakage point by utilizing a negative pressure adsorption principle and then is fixedly installed, and the underwater robot can also assist the conveying pipe of the grouting device to be connected with the grouting hole in the plate. That is, underwater operations are assisted by underwater robots.

Another embodiment of the invention provides a method for plugging a leakage disease of a deep-water dam based on a UHPC (ultra high performance polycarbonate) plate, which is applied to equipment for plugging the leakage disease of the deep-water dam based on the UHPC plate and comprises the following steps:

the underwater robot detects the leakage point position, and a plurality of UHPC plate units are spliced according to the detection data to form a spliced UHPC plate capable of covering the leakage point position;

if the dam surface is uneven, arranging a skirt belt around the spliced UHPC plate;

if the leakage area is large and the flow rate is high, filling the leakage point position with a plugging material by a riprap method, and reducing the flow rate, wherein the plugging material has the same volume weight as water and expands when meeting water, so that the spliced UHPC board is convenient to approach the leakage point position;

the spliced UHPC board is adsorbed at the leakage point position by the aid of an underwater robot and is fixed, if the skirt belt is arranged, the skirt belt is rolled up in the process of lowering the spliced UHPC board, and when the distance between the skirt belt and the leakage point position is 45-55 cm, the underwater robot cuts off the rolled hanging rope to enable the skirt belt to gradually open and adsorb the dam face in the process of approaching the dam face;

and butting a grouting device with the grouting holes in the spliced UHPC plate, grouting the leakage points, and finishing grouting after the grout outlet holes in the spliced UHPC plate discharge the grout, thereby realizing the plugging after the sealing of the leakage points.

In the above embodiment, in order to prevent the skirting from being damaged in the process of lowering the spliced UHPC board, before lowering the spliced UHPC board, the rubber skirting needs to be rolled up, the skirting is hung on the board through the hanging rope, the hanging rope is cut off by an underwater robot, the skirting is opened, and the board is adsorbed and fixed by negative pressure (the outer side is 3Mpa, and the inner side is 0.1 Mpa) generated by a leakage disease part. It should be further noted that, if the stone-throwing method is used to fill the leakage point with the plugging material, the plugging material is thrown into the leakage point channel by the underwater robot, and after the flow rate is reduced, the spliced plate is fixed close to the leakage point.

In order to prove that the UHPC plate unit disclosed by the embodiment of the invention can be suitable for a pressure environment of 3Mpa, a plate strength test is carried out on the UHPC plate unit, and the stress condition of the UHPC plate unit in a pore channel with the diameter of 30cm and a pressure environment of 3Mpa is simulated. As shown in fig. 11, 10 is a support steel plate. And in the pressure test, after the plate is preloaded, the plate is loaded by 1-10 Mpa in stages, and the cracking condition of the plate is checked after the plate is loaded and unloaded each time. Test results show that the UHPC plate unit can bear the compressive stress of more than 10Mpa, and no crack is observed on the naked eye of the plate after unloading. Theoretical calculation shows that when the outer steel plate is not considered, under the action of 30cm aperture and 3Mpa pressure, the maximum tensile stress of the bottom center of the UHPC plate unit is 25Mpa, when ANSYS software is used for simulating the real situation of the outer steel plate, the maximum tensile stress of the bottom plate is calculated to be 13Mpa, and when a UHPC material is subjected to a material property test, the tensile strength of the UHPC concrete material is 7-10 Mpa.

From the above, theoretical calculation shows that the maximum tensile stress of a plate of a UHPC plate unit under the action of 3Mpa is 13Mpa, which is higher than the tensile strength of UHPC concrete, and shows that the plate is likely to crack under the action of pressure, and a pressure test shows that no crack is generated when the plate is unloaded under the action of 10Mpa, and guessed that the crack is closed and can not be seen by naked eyes due to the constraint action of surrounding steel plates after unloading. As the reinforced concrete member is allowed to crack, although fine cracks are generated under the action of certain pressure, the pressure test still shows that the UHPC plate unit meets the strength requirement under the action of 3Mpa water pressure, and the plugging function is not influenced.

Sealing test: the test device for testing the sealing performance of the UHPC plate unit under the flat surface is designed and processed, as shown in FIG. 12, 11 is a square steel plate, and an internal cavity water filling pressure sealing test and a normal pressure water immersion test are carried out on the test device for testing the sealing performance of the UHPC plate unit. The simulated flat dam surface is a square steel plate with the thickness of 2cm and the side length of 70cm, a pressure test is completed on the steel plate in advance, and the test shows that under the action of uniform pressure of 3Mpa and the aperture of 30cm, the flat steel plate almost has no deformation after being loaded for 30 minutes.

The design principle of the UHPC plate unit sealing test device is as follows: the sealing rubber ring is sleeved on the outer side of the plate, the fixed angle steel is installed around the outer side of the rubber ring, the whole device is installed on the leveling steel plate, the fixed angle steel is tightly close to the rubber ring and fixed with the leveling steel plate through bolts, a certain compression is generated by a pressurizing device of a testing machine, and the upper portion of the fixed angle steel is not fixedly connected with the plate angle steel. After the installation is finished, the cavity between the lower part of the plate and the rubber ring is filled with water, and the device needs 0.36 × 0.04 × 1000=5.2l when the device is filled with water. A square support with the side length of 45cm is placed on a testing device, a pressure test is started, a pressure testing machine carries out graded loading, and after preloading, the loading force is respectively increased to 20t, 40t and 60t (the weight of the support is removed), so that the plate can bear the pressure of 1MPa, 2 MPa and 3MPa in a graded mode.

The observation in the testing process finds that the bottom of the sealing rubber ring is compressed along with the increase of pressure, when the pressure reaches 3Mpa, the bottom of the rubber ring is compressed by 1cm (originally 4cm thick), the outer side of the bottom of the rubber ring is restrained by a fixed steel plate, the inner side of the bottom of the rubber ring is restrained by water pressure, the bottom of the rubber ring cannot deform, and the lateral part of the rubber ring is lifted by 2cm because the upper part of the rubber ring is not restrained. After loading, the water seepage condition of the plate is tested, the water seepage (with the height of 4 mm) exists above the plate, the water seepage amount is 0.5 x 0.004 x 1000=1L, after the side inflow reason is eliminated, the analysis is that the water seeps from the bottom to the upper part of the plate due to the fact that fine cracks are generated on the plate under the pressure of 3Mpa and the leakage pore diameter of 30cm, the whole test lasts for 1 hour, the water seepage rate of the plate is 20%, and the description of the strength test is also verified. In addition, because the upper part of the angle steel is not connected and fixed with the rubber ring, water seeps out from the side surface of the rubber ring, and the seepage amount is 10 percent; therefore, the UHPC plate unit has 70 percent of sealing performance under the water pressure of 3MPa and basically meets the plugging requirement. The test also shows a conclusion that the bottom of the rubber ring is provided with a micro-pit detail structure, air is evacuated from the micro-pit to form vacuum in the pressure test process, the generated negative pressure suction force is very large, the plate and a steel plate simulating the flat dam surface cannot be separated, and the plate and the steel plate are forcedly separated by using the thrust of about 10 kN. In the normal-pressure soaking test, the UHPC plate unit test device is soaked in a water tank for 2 hours, then is taken out and disassembled, the soaking condition that the sponge is placed in the cavity in advance is checked, and the test result shows that the sponge is almost dry, so that the plate has good sealing property.

The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. The application, modification and variation of the deep water dam leakage disease plugging device based on UHPC sheet material and the method thereof of the present invention will be apparent to those skilled in the art.

As described above, the embodiment of the invention can rapidly plug the serious leakage disease formed after the disaster of the dam under water of 300 meters, and realize rapid repair of the leakage disease under the action of high water head and high water pressure.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept as defined by the claims and their equivalents.

Claims (10)

1. Deep water dam seepage disease shutoff equipment based on UHPC panel, its characterized in that includes:

splicing UHPC plates, freely splicing a plurality of UHPC plate units according to detection data of leakage points of the deep-water dam to form spliced UHPC plates capable of covering the leakage points, wherein the formed spliced UHPC plates are spliced UHPC plates in regular shapes or spliced UHPC plates in irregular shapes; sending the spliced UHPC board to the leakage point position and fixing the spliced UHPC board on a dam facing, and forming a water blocking face to seal the leakage point position;

and the grouting device is used for grouting and filling the leakage point positions through the grouting holes in the spliced UHPC plate so as to realize the plugging-up and plugging-down of the leakage point positions.

2. The deep water dam leakage damage plugging equipment based on the UHPC board as claimed in claim 1, wherein the UHPC board unit specifically comprises: the angle steel frame is a square frame formed by encircling four angle steels, a longitudinal and transverse reinforcing bar net is arranged in the angle steel frame, and UHPC (ultra high performance concrete) is poured on the reinforcing bar net; the periphery of each UHPC plate unit is provided with a square annular sealing rubber ring with an L-shaped cross section, the sealing rubber ring is sleeved on the UHPC plate unit, and the bottom of the sealing rubber ring is provided with a plurality of rings of micro-pits so as to increase the adsorbability of the dam face of the leakage point; the UHPC plate unit is made of materials which comprise, by mass, 20% of sulpho-aluminum cement, 60% of ordinary cement, 20% of ground cement and 1% of steel fibers, wherein the water-to-glue ratio is 0.18, and the glue concentration ratio is 1.1.

3. The UHPC board-based deep water dam leakage damage plugging apparatus as claimed in claim 2, further comprising a skirt tape, wherein if the dam face of the deep water dam leakage site is not flat, said skirt tape is arranged around said spliced UHPC board, and when said spliced UHPC board is sent to said leakage site and fixed, said skirt tape is attached to the dam face which is not flat around said leakage site by adsorption of negative pressure, so as to be able to completely close the leakage site.

4. The deep water dam leakage disease plugging equipment based on the UHPC board as claimed in claim 2, wherein the specific setting mode of freely splicing a plurality of UHPC board units to form a spliced UHPC board capable of covering leakage points is as follows: the angle steel frame of each UHPC plate unit is provided with a bolt hole, two adjacent UHPC plate units are fixedly connected through the bolt holes, and the vertical part of the sealing rubber ring is clamped between the bolt holes, wherein each UHPC plate unit is provided with a grouting hole and a grout outlet, so that the grouting device can perform grouting filling through the grouting holes in one UHPC plate unit, or perform grouting filling through a plurality of grouting holes in a plurality of UHPC plate units, or perform grouting filling through all the grouting holes in all the UHPC plate units.

5. The deep water dam leakage disease plugging device based on UHPC sheet material as claimed in claim 3, further comprising a fixing device which is a plurality of fixing angle steels arranged around the spliced UHPC sheet material, wherein one steel plate of the fixing angle steels is fixed on the spliced UHPC sheet material, the other steel plate is fixed on the dam face, if the dam face is uneven, the length of the other steel plate is adjusted according to the contact length of the skirt strip and the dam face, so that the end of the other steel plate exceeds the end of the arranged skirt strip, and then the other steel plate is fixed on the dam face through long bolts.

6. The deep water dam leakage disease plugging device based on the UHPC sheet material as claimed in claim 2, further comprising an underwater robot for detecting leakage points and determining the depth, type and surface flatness of the leakage points according to detection data, wherein the spliced UHPC sheet material is delivered to the leakage points by the underwater robot, an iron block is installed at the center of each UHPC sheet material unit, and the iron block is fixedly connected with the steel bars in the UHPC sheet material unit and extends out of the surface of the UHPC sheet material unit, so that the underwater robot can be magnetically gripped and installed.

7. The UHPC sheet-based deep-water dam leakage disease plugging device as recited in claim 6, wherein the type of leakage point of the deep-water dam comprises a single leakage channel, the diameter range is 0-30 cm; the leakage is long and the crack is wide, and the range of the crack width is 5-10 cm; or a plurality of concentrated leakage points with larger areas; wherein the leakage point of the deep water dam is at the depth of 300 meters under the conditions of 3MPa water pressure and 2m/s flow speed; the flatness of the dam surface comprises basic flatness and unevenness, the concave-convex degree of the basic flatness is 2-3 cm, and the concave-convex degree of the unevenness is 7-8 cm; the grouting filling material is a micro-expansion grouting material which is quickly hardened and cured at a low temperature, the side length of a square frame of the angle steel frame is 50cm, the height of the square frame of the angle steel frame is 10cm, the distance between the arranged longitudinal and transverse reinforcing steel meshes is 10cm, and the thickness of concrete poured by the UHPC plate unit is 6cm.

8. The deep water dam leakage damage plugging device based on UHPC sheet material of claim 3, characterized in that the skirt belt is arranged in the following way: if a single UHPC plate unit is used, the skirt belt is in a cylindrical shape with a small upper part and a big lower part, and is sleeved on the periphery of the UHPC plate unit; if the split joint UHPC plate is a plurality of split joint UHPC plates, the skirting strip is formed by split joint UHPC plates surrounded by a plurality of independent skirting strips.

9. The deep water dam leakage disease plugging device based on UHPC sheet material as claimed in claim 8, wherein the contact length of the skirt belt and the dam face is 20cm, the length of the gap between the skirt belt and the dam face is 5cm, the fixed length of the adhesion of the skirt belt and the spliced UHPC sheet material is 15cm, and the thickness of the skirt belt is 2mm; the inclination is cut to monolithic skirt area is 55 degrees, pastes the connection in the place of two skirt areas alternately overlapping 20 degrees angles, the material of skirt area is natural rubber.

10. The method for plugging the leakage diseases of the deep-water dam based on the UHPC sheet material is applied to the device for plugging the leakage diseases of the deep-water dam based on the UHPC sheet material in any one of claims 1 to 9, and is characterized by comprising the following steps:

the underwater robot detects the leakage point position, and a plurality of UHPC plate units are spliced according to the detection data to form a spliced UHPC plate capable of covering the leakage point position;

if the dam surface is uneven, arranging a skirt belt around the spliced UHPC plate;

if the leakage area is large and the flow rate is high, filling the leakage point position with a plugging material by using a stone throwing method to reduce the flow rate, wherein the plugging material has the same volume weight as water and expands when meeting water, so that the spliced UHPC board is convenient to be close to the leakage point position;

the spliced UHPC board is adsorbed at the leakage point position by the aid of an underwater robot and is fixed, if the skirt belt is arranged, the skirt belt is rolled up in the process of lowering the spliced UHPC board, and when the distance between the skirt belt and the leakage point position is 45-55 cm, the underwater robot cuts off the rolled hanging rope to enable the skirt belt to gradually open and adsorb the dam face in the process of approaching the dam face;

and butting a grouting device with the grouting holes in the spliced UHPC plate, grouting the leakage points, and finishing grouting after the grout outlet holes in the spliced UHPC plate discharge the grout, thereby realizing the plugging after the sealing of the leakage points.

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