CN114112833B - Underground engineering waterproof curtain leakage detection device and method - Google Patents
Underground engineering waterproof curtain leakage detection device and method Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 94
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 239000007864 aqueous solution Substances 0.000 claims abstract description 28
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims description 40
- 238000007789 sealing Methods 0.000 claims description 30
- 238000004891 communication Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 9
- 238000003066 decision tree Methods 0.000 description 14
- 238000007637 random forest analysis Methods 0.000 description 14
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- 230000000694 effects Effects 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 4
- 238000012549 training Methods 0.000 description 4
- 230000003028 elevating effect Effects 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000010790 dilution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000013138 pruning Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a leakage detection device for a waterproof curtain of an underground engineering, which comprises a pipeline, a container, a lifting mechanism and a liquid pump. According to the underground engineering waterproof curtain leakage detection device, after the color aqueous solution is pressurized through the liquid pump, the leakage amount of the color aqueous solution to the observation well through the leakage point is increased, the color aqueous solution is facilitated to change the color of the underground water in the observation well, and the leakage condition of the waterproof curtain can be conveniently judged. The invention also discloses a method for detecting leakage of the underground engineering waterproof curtain, which comprises the device for detecting leakage of the underground engineering waterproof curtain. According to the leakage detection method for the underground engineering waterproof curtain, only a small amount of water-based fluorescent tracer enters the observation well through the leakage points, and when the ultraviolet lamp irradiates water in the observation well, fluorescent reaction of the water in the observation well is still clearly visible, so that the leakage condition of the waterproof curtain can be conveniently judged. The invention can be applied to the field of waterproof curtains.
Description
Technical Field
The invention relates to the field of waterproof curtains, in particular to a device and a method for detecting leakage of a waterproof curtain of an underground engineering.
Background
The waterproof curtain is used for enclosing the foundation pit engineering and is used for preventing or reducing the groundwater on the side wall of the foundation pit and the bottom of the foundation pit from flowing into the foundation pit to form a continuous waterproof body. After the waterproof curtain is built, the waterproof curtain needs to be subjected to leakage detection, an observation well and a detection well are usually excavated at the inner side and the outer side of the waterproof curtain in the existing leakage detection, the underground water in the detection well is dyed by utilizing color water, and the waterproof effect of the waterproof curtain is judged by observing the color change of the underground water in the observation well. However, if the waterproof curtain has smaller leakage points, the leakage amount of the color water flowing to the observation well through the leakage points is smaller, and the color of the underground water of the observation well is difficult to change by a small amount of color water.
Disclosure of Invention
The invention aims to provide a leakage detection device and a leakage detection method for an underground engineering waterproof curtain, which are used for solving one or more technical problems in the prior art and at least providing a beneficial selection or creation condition.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a underground works waterproof curtain seepage detection device which characterized in that: comprising the following steps:
The pipeline extends in the vertical direction, a plurality of through holes are formed in the side wall of the pipeline, and all the through holes are arranged at intervals in the vertical direction;
The container is arranged in the pipeline in a sliding manner, a containing cavity is formed in the container, an injection hole is formed in the top of the containing cavity, a through test hole is formed in the side wall of the container, a communication structure is arranged on the outer side wall of the container, and the communication structure is used for communicating the test hole with any through hole;
the lifting mechanism is connected to the top of the container and drives the container to lift in the pipeline;
and the liquid pump is communicated with the filling hole and used for conveying fluid to the accommodating chamber.
The beneficial effects of the invention are as follows: the method comprises the steps of excavating an observation well at the inner side of a waterproof curtain, excavating a detection well at the outer side of the waterproof curtain, placing a pipeline into the detection well, and lowering a container to the bottom end of the pipeline by a lifting mechanism, wherein a communicating structure is arranged on the outer side wall of the container, the communicating structure is communicated with a testing hole and any through hole of the pipeline, a liquid pump is used for conveying color water solution to a containing cavity, the color water solution flows from the testing hole to the through hole, and flows from the through hole to a soil layer at the periphery of the detection well, and the liquid pump is used for conveying the color water solution, so that a larger liquid pressure is formed in the containing cavity, the color water solution in the containing cavity can be facilitated to diffuse outwards through the through hole, so that a small leakage point exists in the waterproof curtain, after the liquid pump is used for pressurizing the color water solution, the leakage amount of the color water solution to the observation well through the leakage point is increased, the color water color of underground in the observation well is changed, and the leakage condition of the waterproof curtain can be conveniently judged; and elevating system can drive the container and reciprocate in the pipeline, makes the container carry out the seepage test at different height, realizes the seepage condition at the waterproof curtain of different height test, and elevating system upwards promotes the container from the bottom of pipeline by one, makes the test hole of container communicate a plurality of through-holes from down to top in proper order, if after the test of a certain altitude position, the observation well groundwater appears colour change, then can judge that there is the leakage point at the waterproof curtain position near this altitude.
As a further improvement of the above technical solution, the lifting mechanism includes a lifting rope connected to the top of the container and a winch wound around the lifting rope.
If the container and the lifting mechanism are rigidly connected, namely, the rigid guide piece drives the container to lift in the pipeline, in the process that the lifting mechanism drives the container to move up and down, the container easily deflects when moving up and down in the pipeline due to the large depth of the pipeline, so that the rigid guide piece is easily deformed in torsion, the lifting mechanism is damaged, the lifting mechanism adopts a winch and a lifting rope, the winch winds the lifting rope, the lifting rope is connected with the top of the container, and the winch is rotated to unwind or wind the lifting rope so as to move the container up and down, so that the lifting mechanism is prevented from being damaged.
As a further improvement of the technical scheme, the communication structure comprises an upper sealing ring and a lower sealing ring, wherein the upper sealing ring and the lower sealing ring are sleeved outside the container, the upper sealing ring and the lower sealing ring are respectively positioned on the upper side and the lower side of the test hole, and an annular liquid flow channel is formed by surrounding the upper sealing ring, the lower sealing ring, the outer side wall of the container and the inner side wall of the pipeline.
Because elevating system's lifting rope drives the in-process that the container risees, the container rotates in the pipeline inside easily, forms annular flow channel between the lateral wall of upper seal circle, lower seal circle, container, the inside wall of pipeline, and the colour water that flows from the test hole flows to the through-hole through flow channel, then the test hole need not to just the through-hole of pipeline, avoids pivoted container to cause test hole and through-hole disconnection.
As a further improvement of the technical scheme, a plurality of test holes are formed, all the test holes are positioned between the upper sealing ring and the lower sealing ring, and all the test holes are communicated with the liquid flow channel.
The liquid pump pressurizes the color water in the accommodating chamber, the color water flows out from the plurality of test holes to the liquid flow channel, flows to the through holes through the liquid flow channel, so that the hydraulic pressure in the liquid flow channel is increased, the color water in the liquid flow channel is facilitated to spread outwards through the through holes, and the leakage amount of the color water solution to the observation well through the leakage points is increased.
A method for detecting leakage of a waterproof curtain for an underground works, comprising the device for detecting leakage of a waterproof curtain for an underground works according to any one of claims 1 to 4, the method comprising the steps of:
S1, excavating a detection well outside a waterproof curtain, excavating an observation well inside the waterproof curtain, placing the pipeline into the detection well, enabling the through hole to face the observation well, and backfilling a gap between the inner wall of the detection well and the outer wall of the pipeline with sand;
S2, placing the container at the bottom of the pipeline;
s3, the lifting mechanism drives the container to move upwards, so that the test hole is communicated with the adjacent through hole;
S4, the liquid pump conveys a water-based fluorescent tracer aqueous solution to the accommodating chamber;
s5, turning on an ultraviolet lamp to irradiate water in the observation well, and observing whether the observation well generates fluorescent reaction or not;
S6, when the water in the observation well has fluorescent reaction, the underground engineering waterproof curtain leakage detection method is completed; and when the water in the observation well has no fluorescent reaction, repeating the steps S3 to S6 until the container moves to the top end of the pipeline.
Digging an observation well and a detection well on the inner side and the outer side of a waterproof curtain, putting a pipeline into the detection well, putting a container into the bottom of the detection well, driving the container to move upwards by a lifting mechanism to enable a test hole to be communicated with a through hole, and conveying a water-based fluorescent tracer aqueous solution to a containing cavity of the container by a liquid pump; if no fluorescence is generated in the water in the observation well, the container is driven to move upwards by the lifting mechanism, so that the test hole is communicated with the other through hole until the container moves to the top end of the pipeline, and the water stopping effect of the waterproof curtain can be judged to be good; the fluorescent reaction of the underground water in the observation well can be clearly and visibly observed by utilizing the ultraviolet lamp to irradiate the water-based fluorescent tracer aqueous solution in the observation well, compared with the color change of the underground water in the observation well by using the color aqueous solution, if the underground water in the observation well is turbid, the color aqueous solution is difficult to change the color of the underground water in the observation well; and if the leakage point of the waterproof curtain is smaller, only a small amount of water-based fluorescent tracer enters the observation well through the leakage point, and when the ultraviolet lamp irradiates the water in the observation well, the fluorescent reaction of the water in the observation well is still clearly visible, so that the leakage condition of the waterproof curtain can be conveniently judged.
As a further improvement of the above technical solution, before the step S4, a water pressure sensor is placed in the water of the observation well, the water pressure value of the observation well is measured by using the water pressure sensor, and the output pressure of the liquid pump is adjusted so that the difference between the output pressure and the water pressure value is greater than 10kpa.
The hydraulic pressure value of the observation well is measured through the hydraulic pressure sensor, the difference between the output pressure of the liquid pump and the hydraulic pressure value is adjusted to be larger than 10kpa, so that the liquid pump injects the water-based fluorescent tracer aqueous solution into the accommodating chamber, the pressure of the water-based fluorescent tracer aqueous solution in the accommodating chamber is larger, the water-based fluorescent tracer aqueous solution is facilitated to diffuse into a soil layer at the periphery of the detection well, the diffusion speed of the water-based fluorescent tracer aqueous solution is greatly improved, and if a small leakage point exists in the waterproof curtain, the output pressure of the liquid pump is increased, and the water-based fluorescent tracer aqueous solution is facilitated to flow into the observation well through the leakage point.
As a further improvement of the above technical solution, in the step S4, the duration of the liquid pump delivering the aqueous solution of the water-based fluorescent tracer to the containing chamber is between 5 minutes and 10 minutes.
The liquid pump is used for conveying the water-based fluorescent tracer aqueous solution to the accommodating cavity for 5 minutes to 10 minutes, and continuously conveying the water-based fluorescent tracer aqueous solution at a larger output pressure, so that the diffusion speed of the water-based fluorescent tracer aqueous solution in the soil layer at the periphery of the detection well is further accelerated.
As a further improvement of the above technical solution, the water of the observation well is pumped for the duration of time so that the water level of the observation well is flush with the test hole.
And during the duration that the liquid pump conveys the water-based fluorescent tracer aqueous solution to the accommodating chamber, the water of the observation well is pumped, so that the water pressure of the observation well is reduced, and the water pressure of the observation well is greatly different from the conveying pressure of the water-based fluorescent tracer aqueous solution conveyed by the liquid pump to the accommodating chamber, if a leakage point exists in the waterproof curtain, the water-based fluorescent tracer aqueous solution in the soil layer of the detection well is promoted to flow into the observation well.
As a further improvement of the above technical solution, in the step S1, the detection well and the observation well are symmetrically arranged with the waterproof curtain as a center line.
The detection well and the observation well are symmetrically arranged by taking the waterproof curtain as a central line, if the waterproof curtain has leakage points, the distance between the water-based fluorescent tracer aqueous solution flowing from the detection well and the waterproof curtain leakage points is equal to the distance between the waterproof curtain leakage points and the observation well, so that the water in the observation well can generate fluorescence as soon as possible, and the position of the waterproof curtain leakage points can be determined by the intersection point of the connection between the detection well and the observation well and the waterproof curtain due to the fact that the straight line distance between the detection well and the observation well is short, and the connection line between the detection well and the observation well is perpendicular to the waterproof curtain.
As a further improvement of the technical scheme, the underground engineering waterproof curtain leakage detection method further comprises the following steps: and carrying out fluorescence capture on the observation well by arranging a fluorescence camera to obtain a target image, and judging whether the waterproof curtain has leakage or not by the target image.
Drawings
The invention is further described below with reference to the drawings and examples;
FIG. 1 is a schematic view of an embodiment of a leakage detection device for a waterproof curtain of an underground construction;
FIG. 2 is a schematic flow chart of an embodiment of a method for detecting leakage of a waterproof curtain of an underground engineering according to the present invention;
FIG. 3 is a schematic diagram showing the positions of a water curtain, a detection well and an observation well in an embodiment of a method for detecting leakage of a water curtain in an underground engineering according to the present invention.
100. The device comprises a pipeline, 110, a through hole, 200, a container, 210, a containing chamber, 211, an injection hole, 220, a test hole, 310, an upper sealing ring, 320, a lower sealing ring, 330, a liquid flow channel, 400, a waterproof curtain, 410, a detection well, 420 and an observation well.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, if there is a word description such as "a plurality" or the like, the meaning of a plurality is one or more, and the meaning of a plurality is two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1, the leakage detection apparatus for a waterproof curtain for an underground construction according to the present invention is constructed as follows:
The underground engineering waterproof curtain leakage detection device comprises a pipeline 100, a container 200, a communication structure, a lifting mechanism and a liquid pump.
The pipeline 100 is a vertical circular tube extending along the up-down direction, a plurality of through holes 110 are arranged on the side wall of the pipeline 100, all the through holes 110 are arranged at equal intervals along the up-down direction, and all the through holes 110 are positioned on the same vertical line. The container 200 is cylindrical in shape, the container 200 is slidably disposed in the pipe 100, and a gap is left between the outer wall of the container 200 and the inner wall of the pipe 100. The communication structure is arranged on the outer side wall of the container 200, the communication structure comprises an upper sealing ring 310 and a lower sealing ring 320, the upper sealing ring 310 and the lower sealing ring 320 are arranged at an upper-lower interval, the upper sealing ring 310 and the lower sealing ring 320 are sleeved on the outer side wall of the container 200 in a surrounding manner, and an annular liquid flow channel 330 is formed among the upper sealing ring 310, the lower sealing ring 320, the outer side wall of the container 200 and the inner wall of the pipeline 100.
The container 200 is provided with a receiving chamber 210 inside, the top of the container 200 is provided with an injection hole 211, the injection hole 211 penetrates through the top wall of the container 200, and the injection hole 211 communicates with the receiving chamber 210 and the outside. The sidewall of the container 200 is provided with a plurality of test holes 220, each test hole 220 penetrates through the sidewall of the container 200, all test holes 220 are located between the upper seal ring 310 and the lower seal ring 320, each test hole 220 is communicated with the liquid flow channel 330 and the accommodating chamber 210, and all test holes 220 are located on the same horizontal plane.
The top of the container 200 is provided with a pull ring, a lifting mechanism is connected to the pull ring, the lifting mechanism comprises a winch and a lifting rope, the lifting rope is connected to the pull ring, the winch winds the lifting rope, and the winch rotates to wind or unwind the lifting rope, so that the container 200 is driven to move up and down in the pipeline 100. The output of the liquid pump is connected to the filling port 211 of the container 200, and the liquid pump delivers fluid into the receiving chamber 210.
The use flow of the underground engineering waterproof curtain leakage detection device is as follows: digging a detection well 410 outside a waterproof curtain 400, digging an observation well 420 inside the waterproof curtain 400, placing a pipeline 100 into the detection well 410, backfilling a gap between the inner wall of the detection well 410 and the outer wall of the pipeline 100 with sand, placing a container 200 into the bottom of the pipeline 100, driving the container 200 to move upwards in the pipeline 100 by using a lifting mechanism, enabling a testing hole 220 of the container 200 to communicate with a through hole 110 at the lowest position of the pipeline 100, then conveying a color aqueous solution to a containing cavity 210 by a liquid pump, enabling the color aqueous solution to flow into a soil layer of the detection well 410 after the testing hole 220 and the through hole 110, and observing color change from groundwater of the observation well 420 if the waterproof curtain 400 has a leakage point at the height of the container 200, thereby determining that the waterproof curtain 400 leaks; if no leakage point exists in the waterproof curtain 400 at the height, the lifting mechanism drives the container 200 to move upwards, so that the test hole 220 is communicated with the other adjacent through hole 110 above, the liquid pump conveys the color water solution into the accommodating cavity 210, and observes the color change of the underground water of the observation well 420, and the above actions are repeated until the color change of the underground water of the observation well 420 occurs, so that the position of the leakage point of the waterproof curtain 400 is determined; if the container 200 is lifted up to the top of the pipe 100 and the groundwater in the observation well 420 is still unchanged, it can be determined that the waterproof effect of the waterproof curtain 400 is good.
Referring to fig. 2 to 3, the leakage detection method of the underground engineering waterproof curtain of the present invention makes the following embodiments:
The underground engineering waterproof curtain leakage detection method comprises the underground engineering waterproof curtain leakage detection device and further comprises the following steps:
S1, excavating a detection well 410 outside a waterproof curtain 400, excavating an observation well 420 inside the waterproof curtain 400, placing a pipeline 100 into the detection well 410, enabling a through hole 110 to face the observation well 420, backfilling a gap between the inner wall of the detection well 410 and the outer wall of the pipeline 100 with sand, and symmetrically arranging the detection well 410 and the observation well 420 by taking the waterproof curtain 400 as a central line;
s2, placing the container 200 into the bottom of the pipeline 100;
s3, the lifting mechanism drives the container 200 to move upwards, so that the test hole 220 is communicated with the adjacent through hole 110;
Placing a water pressure sensor into water of the observation well 420, measuring the water pressure value of the observation well 420 by using the water pressure sensor, and adjusting the output pressure of the liquid pump to ensure that the difference between the output pressure and the water pressure value is more than 10kpa;
S4, a liquid pump conveys a water-based fluorescent tracer aqueous solution to the accommodating chamber 210, wherein the water-based fluorescent tracer aqueous solution is selected from conventional water-based fluorescent tracers such as: LUYOR-6300 water-based fluorescent leak detection agent, preferably, the dilution ratio is 1:2000-1:5000, water of the observation well 420 is observed, the duration of delivering the water-based fluorescent tracer aqueous solution to the accommodating chamber 210 by the liquid pump is between 5 minutes and 10 minutes, and during the duration, water of the observation well 420 is extracted, so that the water level of the observation well 420 is flush with the test hole 220;
S5, turning on an ultraviolet lamp to irradiate water in the observation well 420, and observing whether the observation well 420 generates fluorescent reaction or not;
S6, when the water in the observation well 420 has fluorescent reaction, the underground engineering waterproof curtain leakage detection method is completed; when the water in the observation well 420 does not react with fluorescence, steps S3 to S6 are repeated until the container 200 moves to the top end of the pipe 100.
The pipeline 100 is made of polyvinyl chloride materials, is light and durable, has high impact resistance, and can prevent sand and stone from impacting and damaging the pipeline 100 by backfilling sand and stone into a gap between the outer wall of the pipeline 100 and the detection well 410 after the pipeline 100 is placed in the detection well 410 on the outer side of the waterproof curtain 400.
In some cases, due to environmental constraints. When there is a leakage in the waterproof curtain 400, it is often not easy to directly observe the leakage in the observation well 420 by naked eyes. Thus, in some preferred embodiments, by providing a fluorescent camera, the observation well 420 is subjected to fluorescent capturing, so as to obtain a target image, and whether the leakage condition exists in the waterproof curtain 400 is judged through the target image.
The method comprises the following steps: whether a leak condition exists can be determined by counting the area occupied by the light spots in the target image. By setting the area reference threshold, when the area occupied by the light spot in the target image exceeds the area reference threshold, the leakage condition is considered to exist. And when the area occupied by the light spot in the target image does not exceed the area reference threshold value, no leakage condition exists. The light spots in the target image refer to pixel points in the target image, wherein the gray value of the pixel points exceeds a gray reference threshold value. Wherein the gray reference threshold is preset.
The method for acquiring the light spot in the target image comprises the following steps:
A1, carrying out gray scale operation on the target image to obtain a gray scale image;
A2, carrying out binarization operation on the gray level image to obtain a binarization image, wherein a threshold value of the binarization operation is the gray level reference threshold value;
And step A3, taking the pixel point with the gray level value of 255 in the binarization graph as a light spot in the target image.
In some embodiments, after determining that there is a leakage of the waterproof curtain 400, a leakage degree classification model may be established based on a random forest algorithm to further determine the leakage degree of the waterproof curtain 400.
And establishing a leakage degree classification model based on a random forest algorithm, and obtaining a classification result of the leakage degree of the waterproof curtain 400 by inputting the target image into the leakage degree classification model.
The method for establishing the leakage degree classification model comprises the following steps:
S11, a fluorescence capturing method is adopted in advance to capture the conditions of different leakage degrees, so that corresponding target images are obtained, the target images are called sample image data, and the data are used for establishing a leakage degree classification model;
wherein the data set formed by the sample image data obtained in step S11 is taken as a sample image data set;
s12, randomly dividing the obtained sample image data set into a training set and a verification set, and modeling the training set by using a random forest algorithm so as to establish and obtain a random forest model;
The random forest model is formed by combining decision trees formed by a plurality of self-service samples, and the decision trees formed by the self-service samples are established and generated by the steps of:
S121, selecting k sample image data from N sample image data contained in a sample image data set in a random selection mode by a self-help sampling method, and training and generating a decision tree by using the selected k sample image data; the above process is a Bagging process;
s122, randomly selecting M variables from M variables contained in a sample image dataset when each node of the decision tree needs to be split, wherein M < < M; then, designating the selected m variables as subsets to each node, and selecting one-dimensional features with the best classification effect from the m variables as classification attributes of the nodes, wherein m is ensured to be unchanged in the growth process of the random forest; the step is a splitting attribute selection process;
s123, stopping the growth of the decision trees when the classification purity of each node reaches a desired proportion or the number of growing layers reaches a given value (namely a threshold value), ensuring that each decision tree is grown to the maximum extent and no pruning condition exists; the step is the growth process of the decision tree;
by repeating the steps S121 to S123, n decision trees can be built to form a random forest model.
In the random forest self-help sampling process of the embodiment, in sample image data used when each tree is built, 57.3% of sample image data is used as a training set, the rest 42.7% of sample image data is used as a verification set to carry out 'out-of-bag estimation' on generalization performance, and the 42.7% of data can also be called out-of-bag data and can be used for replacing a test set to carry out error estimation and be used as an evaluation index to optimize parameters;
Two parameters mainly need to be optimized in the modeling process of the random forest algorithm: the number of decision trees and the variable number of each tree in growth; the number of decision trees directly affects the operation speed and the classification effect of the random forest classification algorithm, so that the number of decision trees is important to modeling, for example, if the number of decision trees is too large, the speed of the random forest algorithm is reduced, otherwise, if the number of decision trees is too small, the classification accuracy of the model is reduced;
s13, performing dimension reduction on a sample image similarity matrix obtained by a random forest model through a multidimensional scaling analysis (MDS);
S14, verifying the random forest model by using a verification set, and finally determining to obtain a leakage degree classification model;
The classification of the target image is realized by using the established leakage degree classification model, so that the classification result of the leakage degree of the waterproof curtain 400 is obtained by inputting the photographed target image into the leakage degree classification model.
The method comprises the following steps:
s21, performing fluorescence capture through the observation well 420 by adopting a fluorescence camera, so as to obtain a current leaked target image;
S22, inputting the target image into a leakage degree classification model for classification treatment, so as to derive a sample image similarity matrix;
s23, performing dimension reduction on the sample image similarity matrix by adopting a multidimensional scale analysis method, wherein the matrix obtained after dimension reduction is a classification result of the target image.
S24, obtaining the leakage degree of the waterproof curtain 400 according to the classification result of the target image.
The advantages of using multidimensional scaling analysis are: after each tree is built, all sample image data reach a certain leaf node of the tree, if the frequency of the target images corresponding to two leakage degrees falling on the same leaf node of each tree is larger, the similarity is higher, so that the sample image similarity matrix derived from the decision tree can collect the similarity between the target images and the sample image data, and the original spatial samples are mapped to a similarity space; in order to intuitively and conveniently observe the classification result derived from the random forest model, the multidimensional scaling analysis method is adopted to realize the dimension reduction of the sample image similarity matrix, so that the similarity between original objects can be kept as much as possible, that is, the dimension reduction step is provided, the effect of intuitively and conveniently observing the classification result is achieved, and meanwhile, the accuracy of the dimension reduction result can be ensured.
While the preferred embodiment of the present application has been described in detail, the application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the application, and these modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (7)
1. The utility model provides a underground works waterproof curtain seepage detection device which characterized in that: comprising the following steps:
the pipeline (100) extends along the up-down direction, a plurality of through holes (110) are formed in the side wall of the pipeline (100), and all the through holes (110) are arranged at intervals along the up-down direction;
The container (200) is slidably arranged in the pipeline (100), a containing cavity (210) is formed in the container (200), an injection hole (211) is formed in the top of the containing cavity (210), a through testing hole (220) is formed in the side wall of the container (200), a communication structure is arranged on the outer side wall of the container (200), and the communication structure is used for communicating the testing hole (220) with any through hole (110);
a lifting mechanism connected to the top of the container (200), the lifting mechanism driving the container (200) to lift in the pipeline (100);
a liquid pump communicating with the injection hole (211), the liquid pump delivering fluid to the accommodating chamber (210);
the communication structure comprises an upper sealing ring (310) and a lower sealing ring (320), the upper sealing ring (310) and the lower sealing ring (320) are sleeved outside the container (200), the upper sealing ring (310) and the lower sealing ring (320) are respectively positioned on the upper side and the lower side of the test hole (220), and an annular liquid flow channel (330) is formed by surrounding the upper sealing ring (310), the lower sealing ring (320), the outer side wall of the container (200) and the inner side wall of the pipeline (100);
The test holes (220) are multiple, all the test holes (220) are located between the upper sealing ring (310) and the lower sealing ring (320), and all the test holes (220) are communicated with the liquid flow channel (330).
2. The underground works waterproof curtain seepage detection device of claim 1, wherein: the lifting mechanism comprises a lifting rope and a winch, wherein the lifting rope is connected with the top of the container (200), and the winch winds the lifting rope.
3. A leakage detection method of an underground engineering waterproof curtain is characterized in that: comprising the underground works waterproof curtain leakage detecting apparatus as claimed in any one of claims 1 to 2, the underground works waterproof curtain leakage detecting method comprising the steps of:
s1, excavating a detection well (410) on the outer side of a waterproof curtain (400), excavating an observation well (420) on the inner side of the waterproof curtain (400), placing the pipeline (100) into the detection well (410), enabling the through hole (110) to face the observation well (420), and backfilling a gap between the inner wall of the detection well (410) and the outer wall of the pipeline (100) with sand;
s2, placing the container (200) at the bottom of the pipeline (100);
s3, the lifting mechanism drives the container (200) to move upwards, so that the test hole (220) is communicated with the adjacent through hole (110);
Placing a water pressure sensor into water of the observation well (420), measuring a water pressure value of the observation well (420) by using the water pressure sensor, and adjusting output pressure of the liquid pump to ensure that the difference between the output pressure and the water pressure value is more than 10kpa;
S4, the liquid pump conveys a water-based fluorescent tracer aqueous solution to the accommodating chamber (210);
S5, turning on an ultraviolet lamp to irradiate water in the observation well (420), and observing whether the observation well (420) generates fluorescent reaction or not;
s6, when the water in the observation well (420) has fluorescent reaction, the underground engineering waterproof curtain leakage detection method is completed; when the water in the observation well (420) has no fluorescence reaction, repeating steps S3 to S6 until the container (200) moves to the top end of the pipe (100).
4. The method for detecting leakage of underground engineering waterproof curtain according to claim 3, wherein: in the step S4, the liquid pump delivers the aqueous solution of the water-based fluorescent tracer to the containing chamber (210) for a duration of between 5 minutes and 10 minutes.
5. The method for detecting leakage of underground engineering waterproof curtain according to claim 4, wherein: during the duration, water is drawn from the observation well (420) such that the water level of the observation well (420) is flush with the test hole (220).
6. The method for detecting leakage of underground engineering waterproof curtain according to claim 3, wherein: in the step S1, the detection well (410) and the observation well (420) are symmetrically arranged with the waterproof curtain (400) as a center line.
7. The method for detecting leakage of underground engineering waterproof curtain according to claim 3, wherein: the leakage detection method of the underground engineering waterproof curtain further comprises the following steps: and (3) performing fluorescence capture on the observation well (420) through the fluorescent camera to obtain a target image, and judging whether the waterproof curtain (400) has leakage or not through the target image.
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