CN114112833A - 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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- 239000007788 liquid Substances 0.000 claims abstract description 44
- 239000007864 aqueous solution Substances 0.000 claims abstract description 38
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 23
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- G01N15/00—Investigating characteristics of particles; 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
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- 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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Abstract
The invention discloses a device for detecting leakage of a waterproof curtain of an underground engineering. According to the device for detecting the leakage of the underground engineering waterproof curtain, the liquid pump pressurizes the color aqueous solution, the amount of the color aqueous solution leaking to the observation well through the leakage point is increased, the color aqueous solution is facilitated to change the color of underground water in the observation well, and the leakage condition of the waterproof curtain is convenient to judge. The invention also discloses a method for detecting the leakage of the underground engineering waterproof curtain, which comprises the device for detecting the leakage of the underground engineering waterproof curtain. According to the method for detecting the leakage of the underground engineering waterproof curtain, only a small amount of water-based fluorescent tracer enters the observation well through the leakage point, and when the water in the observation well is irradiated by the ultraviolet lamp, the fluorescence reaction generated in the water in the observation well is still clear and 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 project.
Background
The waterproof curtain is used for enclosing the foundation pit engineering and is used for preventing or reducing continuous water stopping bodies which are adopted when underground water on the side wall of the foundation pit and the bottom of the foundation pit flows into the foundation pit. After the waterproof curtain is built, leakage detection needs to be carried out on the waterproof curtain, an observation well and a detection well are usually dug on the inner side and the outer side of the waterproof curtain in the conventional leakage detection, underground water in the detection well is dyed by using colored 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 a small leakage point, the leakage amount of the color water in the detection well flowing to the observation well through the leakage point is small, and the color of the underground water of the observation well is difficult to change due to a small amount of color water.
Disclosure of Invention
The invention aims to provide a device and a method for detecting seepage of a waterproof curtain of an underground project, which are used for solving one or more technical problems in the prior art and at least provide a beneficial choice or creation condition.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides an underground works waterproof curtain leakage detection device which characterized in that: the method comprises the following steps:
the pipeline extends along 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 along the vertical direction;
the container is arranged in the pipeline in a sliding mode, an accommodating cavity is arranged inside the container, a filling hole is formed in the top of the accommodating cavity, a through testing hole is formed in the side wall of the container, a communicating structure is arranged on the outer side wall of the container, and the communicating structure is communicated with the testing hole and any one through hole;
the lifting mechanism is connected to the top of the container and drives the container to lift in the pipeline;
a liquid pump communicating with the injection hole, the liquid pump delivering fluid to the accommodation chamber.
The invention has the beneficial effects that: the inspection well is excavated on the inner side of the waterproof curtain, the detection well is excavated on the outer side of the waterproof curtain, the pipeline is placed in the detection well, the container is lowered to the bottom end of the pipeline by the lifting mechanism, the communicating structure is arranged on the outer side wall of the container and communicates the testing hole with any one through hole of the pipeline, the color aqueous solution is conveyed to the accommodating chamber by the liquid pump, the color aqueous solution flows to the through hole from the testing hole, the color aqueous solution flows to the soil layer on the periphery of the detection well from the through hole, the color aqueous solution is conveyed by the liquid pump to form higher liquid pressure in the accommodating chamber, so that the color aqueous solution in the accommodating chamber is favorably diffused and spread outwards through the through hole, even if the waterproof curtain has smaller leakage points, after the color aqueous solution is pressurized by the liquid pump, the leakage amount of the color aqueous solution to the inspection well through the leakage points is increased, and the color of the underground water in the inspection well is favorably changed by the color aqueous solution, 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 leakage test at co-altitude not, realizes the seepage condition at co-altitude test waterproof curtain, and elevating system promotes the container from the bottom of pipeline up one by one, makes the test hole of container from up communicating a plurality of through-holes in proper order down, if after certain high position test, the colour change appears in the inspection shaft groundwater, then can judge that there is the leakage point at this high near waterproof curtain position.
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 that winds 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, the lifting mechanism drives the container to move up and down, and the lifting mechanism is damaged by adopting a winch and a lifting rope, wherein the winch winds the lifting rope, the lifting rope is connected with the top of the container, and the winch is rotated to enable the lifting rope to unreel or reel the container up and down, so that the lifting mechanism is prevented from being damaged.
As a further improvement of the above technical solution, the communicating structure includes an upper sealing ring and a lower sealing ring, the upper sealing ring and the lower sealing ring are both sleeved outside the container, the upper sealing ring and the lower sealing ring are respectively located at the upper side and the lower side of the testing hole, and an annular liquid flow channel is defined between the upper sealing ring, the lower sealing ring, the outer side wall of the container and the inner side wall of the pipeline.
Because the lifting rope of elevating system drives the in-process that the container goes up and down, the container rotates in the pipeline is easy, 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 out from the test hole flows to the through-hole through flow channel, then the test hole need not just to the through-hole of pipeline, avoids the pivoted container to cause the test hole and the disconnection of through-hole.
As a further improvement of the above technical solution, there are a plurality of the test holes, all the test holes are located between the upper seal ring and the lower seal ring, and all the test holes are communicated with the liquid flow channel.
The plurality of test holes are positioned between the upper seal ring and the lower seal ring, the plurality of test holes are communicated with the liquid flow channel, the liquid pump pressurizes the color water in the accommodating cavity, the color water flows out from the plurality of test holes to the liquid flow channel and flows to the through hole through the liquid flow channel, the hydraulic pressure in the liquid flow channel is increased, the color water in the liquid flow channel is favorably diffused and spread outwards through the through hole, and the leakage amount of the color water solution to the observation well through a leakage point is increased.
An underground engineering waterproof curtain leakage detection method comprising the underground engineering waterproof curtain leakage detection device as claimed in any one of claims 1 to 4, the underground engineering waterproof curtain leakage detection method comprising the following steps:
s1, excavating a detection well on the outer side of the waterproof curtain, excavating an observation well on the inner side of the waterproof curtain, putting 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 gravel;
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 one adjacent through hole;
s4, the liquid pump conveys a water-based fluorescent tracer aqueous solution to the containing chamber;
s5, turning on an ultraviolet lamp to irradiate the water in the observation well, and observing whether the observation well generates a fluorescence reaction;
s6, when the water in the observation well has a fluorescence reaction, completing the underground engineering waterproof curtain leakage detection method; when the water in the observation well does not react fluorescently, repeating steps S3-S6 until the container moves to the top end of the pipe.
The method comprises the steps that an observation well and a detection well are excavated on the inner side and the outer side of a waterproof curtain, a pipeline is placed in the detection well, a container is placed at the bottom of the detection well, a lifting mechanism drives the container to move upwards to enable a test hole to be communicated with a through hole, a liquid pump conveys a water-based fluorescent tracer aqueous solution to a containing cavity of the container, if a leakage point exists at the height of the container, the water-based fluorescent tracer aqueous solution flows to the water of the observation well from the leakage point, when an ultraviolet lamp irradiates the water in the observation well, the water in the observation well generates fluorescence, and then the fact that the leakage point exists at the height of the waterproof curtain can be judged; if no fluorescence is generated in the water in the observation well, the container is driven to move upwards through 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 water stopping 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 irradiating the water-based fluorescent tracer aqueous solution in the observation well by using an ultraviolet lamp, and compared with the method for changing the color change of the underground water in the observation well by using a 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 small, only a small amount of water-based fluorescent tracer enters the observation well through the leakage point, and when the water in the observation well is irradiated by the ultraviolet lamp, the fluorescence reaction generated in the water in the observation well is still clear and visible, so that the leakage condition of the waterproof curtain can be conveniently judged.
As a further improvement of the above technical solution, before step S4, a water pressure sensor is placed in the water in the observation well, the water pressure sensor is used to measure the water pressure value of the observation well, 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 10 kpa.
The water pressure value of the observation well is measured through the water pressure sensor, the difference between the output pressure of the liquid pump and the water pressure value is adjusted to be larger than 10kpa, so that the pressure of the liquid pump for injecting the water-based fluorescent tracer aqueous solution into the accommodating cavity is large, the water-based fluorescent tracer aqueous solution in the accommodating cavity is favorably diffused to a soil layer on the periphery of the detection well, the diffusion speed of the water-based fluorescent tracer aqueous solution is greatly improved, and if a waterproof curtain has a small leakage point, the output pressure of the liquid pump is increased, and the water-based fluorescent tracer aqueous solution is favorably flowed into the observation well through the leakage point.
As a further improvement of the above technical solution, in step S4, the liquid pump delivers the water-based fluorescent tracer aqueous solution to the accommodating chamber for a time period ranging from 5 minutes to 10 minutes.
The liquid pump conveys the water-based fluorescent tracer aqueous solution to the accommodating chamber for 5-10 minutes, and the liquid pump continuously conveys the water-based fluorescent tracer aqueous solution at a higher 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, during the duration, water in the observation well is extracted so that the water level of the observation well is flush with the test hole.
During the time that the liquid pump conveys the water-based fluorescent tracer aqueous solution to the containing cavity, the water of the observation well is extracted, the water pressure of the observation well is favorably 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 to the containing cavity by the liquid pump, so that if a water-stop curtain has a leakage point, the water-based fluorescent tracer aqueous solution in a soil layer of the detection well is favorably promoted to flow into the observation well.
As a further improvement of the above technical solution, in step S1, the inspection 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 a leakage point exists in the waterproof curtain, the distance from the water-based fluorescent tracer aqueous solution flowing to the leakage point of the waterproof curtain from the detection well is equal to the distance from the leakage point of the waterproof curtain to the observation well, so that the water in the observation well can generate fluorescence as soon as possible.
As a further improvement of the above technical solution, the method for detecting leakage of a waterproof curtain of an underground engineering further comprises: 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 a leakage condition or not according to the target image.
Drawings
The invention is further described with reference to the accompanying drawings and examples;
FIG. 1 is a schematic structural diagram of an embodiment of a waterproof curtain leakage detection device for an underground project, according to the present invention;
FIG. 2 is a schematic flow chart illustrating an embodiment of a method for detecting a leakage of a waterproof curtain in an underground engineering according to the present invention;
fig. 3 is a schematic diagram of positions of a waterproof curtain, a detection well and an observation well in an embodiment of a method for detecting leakage of a waterproof curtain of an underground project.
100. The device comprises a pipeline, 110, a through hole, 200, a container, 210, a containing chamber, 211, an injection hole, 220, a testing 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 preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are described, the meaning is one or more, the meaning of a plurality is two or more, more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, the underground engineering waterproof curtain leakage detection device of the invention is made by the following embodiments:
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 container 200 has a receiving chamber 210 therein, the top of the container 200 has a filling hole 211, the filling hole 211 penetrates the top wall of the container 200, and the filling hole 211 communicates the receiving chamber 210 with the outside. The side wall of the container 200 is provided with a plurality of test holes 220, each test hole 220 penetrates through the side wall of the container 200, all the test holes 220 are positioned between the upper sealing ring 310 and the lower sealing ring 320, each test hole 220 is communicated with the liquid flow channel 330 and the accommodating chamber 210, and all the test holes 220 are positioned on the same horizontal plane.
The top of the container 200 is provided with a pull ring, the 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 injection hole 211 of the container 200, and the liquid pump delivers the fluid into the receiving chamber 210.
The use process of the underground engineering waterproof curtain leakage detection device is as follows: excavating a detection well 410 on the outer side of the 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, backfilling a gap between the inner wall of the detection well 410 and the outer wall of the pipeline 100 by using sandstone, placing the 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 the test hole 220 of the container 200 to be communicated with the through hole 110 at the lowest part of the pipeline 100, then conveying a color aqueous solution into the accommodating chamber 210 by using a liquid pump, enabling the color aqueous solution well test hole 220 and the through hole 110 to flow into a soil layer of the detection well 410, and if a leakage point exists at the height of the container 200 in the waterproof curtain 400, enabling the color aqueous solution to flow into the observation well 420 through the leakage point, enabling color change to be observed from underground water of the observation well 420, and determining that the waterproof curtain 400 leaks; if the waterproof curtain 400 does not have a leakage point at the height, the lifting mechanism drives the container 200 to move upwards, so that the test hole 220 is communicated with the other through hole 110 adjacent to the upper part, the liquid pump conveys the color aqueous solution into the accommodating chamber 210, the color change of the underground water of the observation well 420 is observed, the actions are repeated until the color change of the underground water of the observation well 420 occurs, and then the position of the leakage point of the waterproof curtain 400 is determined; if the container 200 rises to the top of the pipeline 100 and the groundwater in the observation well 420 is not changed, it can be determined that the water-stopping effect of the water-stopping curtain 400 is good.
Referring to fig. 2 to 3, the method for detecting leakage of underground engineering waterproof curtain of the invention comprises the following steps:
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 on the outer side of the waterproof curtain 400, excavating an observation well 420 on the inner side of the waterproof curtain 400, putting the pipeline 100 into the detection well 410, enabling the 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 by 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 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 one adjacent through hole 110;
putting a water pressure sensor into the 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 10 kpa;
s4, the liquid pump delivers the aqueous solution of water-based fluorescent tracer to the containing chamber 210, and the aqueous solution of water-based fluorescent tracer is selected from conventional water-based fluorescent tracers such as: the LUYOR-6300 water-based fluorescent leak detector is diluted at a ratio of 1: 2000-1: 5000, water in the observation well 420 is observed, a liquid pump conveys a water-based fluorescent tracer aqueous solution to the accommodating chamber 210 for 5-10 minutes, and during the time, water in the observation well 420 is extracted to enable the water level of the observation well 420 to be flush with the test hole 220;
s5, turning on an ultraviolet lamp to irradiate the water in the observation well 420, and observing whether the observation well 420 generates a fluorescence reaction;
s6, when the water in the observation well 420 has a fluorescence reaction, completing the underground engineering waterproof curtain leakage detection method; when the water in the observation well 420 does not react fluorogenically, steps S3 to S6 are repeated until the container 200 is moved to the top end of the pipeline 100.
The pipeline 100 is made of polyvinyl chloride materials, is light and durable, and has high impact strength resistance, sand is filled into a gap between the outer wall of the pipeline 100 and the detection well 410 after the pipeline 100 is placed into the detection well 410 outside the waterproof curtain 400, and the pipeline 100 can be prevented from being damaged by sand impact.
In some cases, due to environmental constraints. When the waterproof curtain 400 has a leak, it is not easy to directly observe the leak in the observation well 420 by naked eyes. Therefore, in some preferred embodiments, a fluorescence camera is arranged, and the observation well 420 is subjected to fluorescence capture to obtain a target image, and whether the waterproof curtain 400 has a leakage condition is determined according to the target image.
The method specifically comprises the following steps: the presence of a leak can be determined by counting the area occupied by the light spots in the target image. By setting an 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, determining that no leakage exists. The light points in the target image refer to pixel points of which the gray value exceeds a gray reference threshold value in the target image. Wherein the gray reference threshold is preset.
The method for acquiring the light spot in the target image comprises the following steps:
step A1, carrying out gray scale operation on the target image to obtain a gray scale image;
a2, performing binarization operation on the gray level image to obtain a binarization image, wherein the threshold value of the binarization operation is the gray level reference threshold value;
and step A3, taking the pixel points with the gray value of 255 in the binary image as light spots in the target image.
In some embodiments, after determining that there is a leakage of the waterproof curtain 400, the leakage degree of the waterproof curtain 400 may be further determined by establishing a leakage degree classification model based on a random forest algorithm.
And establishing a leakage degree classification model by using a random forest algorithm, and inputting the target image into the leakage degree classification model to obtain a classification result of the leakage degree of the waterproof curtain 400.
The method for establishing the leakage degree classification model comprises the following steps:
s11, shooting the conditions of different leakage degrees by adopting a fluorescence camera to carry out a fluorescence capture method in advance so as to obtain corresponding target images, wherein the target images are called sample image data, and the data are used for establishing a leakage degree classification model;
wherein a data set constituted by the sample image data acquired in step S11 is set as a sample image data set;
s12, randomly dividing the obtained sample image data set into a training set and a verification set, and carrying out modeling processing on the training set by using a random forest algorithm so as to establish a random forest model;
the random forest model is formed by combining a plurality of decision trees formed by self-help sampling, and the establishment and generation steps of the decision trees formed by self-help sampling comprise:
s121, selecting k sample image data from N sample image data contained in a sample image data set by a self-service sampling method in a random selection mode, and training by using the selected k sample image data to generate a decision tree; the above process is the Bagging process;
s122, when each node of the decision tree needs to be split, randomly selecting M variables from M variables contained in the sample image data set, wherein M < < M; then, m selected variables are used as subsets to be assigned to each node, one-dimensional features with the best classification effect are selected from the m variables to serve as classification attributes of the nodes, and m is guaranteed to be kept 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 an expected proportion or the number of growing layers reaches a given value (namely a threshold), and ensuring that each decision tree can grow to the maximum extent without pruning; the step is a growth process of the decision tree;
by repeatedly executing the steps S121 to S123, n decision trees can be built to form a random forest model.
In the self-help sampling process of the random forest in the embodiment, in the sample image data used when each tree is established, 57.3% of the sample image data is used as a training set, and the remaining 42.7% of the sample image data is used as a verification set to perform 'out-of-bag estimation' on generalization performance, wherein the 42.7% of the data can also be called out-of-bag data and can be used for replacing a test set to perform error estimation and used as an evaluation index to optimize parameters;
two parameters are mainly required to be optimized in the modeling process of the random forest algorithm: the number of decision trees and the number of variables per tree as it grows; the number of the decision trees directly influences the operation speed and the classification effect of the random forest classification algorithm, so that the number of the decision trees is crucial to modeling, for example, if the number of the decision trees is too large, the speed of the random forest algorithm is reduced, otherwise, if the number of the decision trees is too small, the classification accuracy of the model is reduced;
s13, reducing the dimension of the sample image similarity matrix obtained by the 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 images is realized by using the established leakage degree classification model, so that the shot target images are input into the leakage degree classification model to obtain the classification result of the leakage degree of the waterproof curtain 400.
The method specifically comprises the following steps:
s21, performing fluorescence capture through the observation well 420 by using a fluorescence camera, so as to obtain a current leaked target image;
s22, inputting the target image into the leakage degree classification model for classification processing, thereby deriving a sample image similarity matrix;
and S23, reducing the dimension of the sample image similarity matrix by adopting a multi-dimensional scale analysis method, wherein the matrix obtained after dimension reduction is the classification result of the target image.
And S24, obtaining the leakage degree of the waterproof curtain 400 according to the classification result of the target image.
The benefits 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 that target images corresponding to two leakage degrees fall on the same leaf node of each tree is higher, the higher the similarity is, therefore, a sample image similarity matrix derived from the decision tree can collect the similarity between the target images and the sample image data, and an original space sample is mapped to a similarity space; in order to observe the classification result derived from the random forest model intuitively and conveniently, the multi-dimensional scale 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, namely, the dimension reduction step is arranged, the effect of observing the classification result intuitively and conveniently is achieved, and meanwhile, the accuracy of the dimension reduction result can be ensured.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (10)
1. The utility model provides an underground works waterproof curtain leakage detection device which characterized in that: the method comprises the following steps:
the pipeline (100) extends along the vertical 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 vertical direction;
the container (200) is arranged in the pipeline (100) in a sliding mode, a containing chamber (210) is arranged inside the container (200), a filling hole (211) is formed in the top of the containing chamber (210), a through testing hole (220) is formed in the side wall of the container (200), a communicating structure is arranged on the outer side wall of the container (200), and the communicating structure is communicated with the testing hole (220) and any one through hole (110);
the lifting mechanism is connected to the top of the container (200), and drives the container (200) to lift in the pipeline (100);
a liquid pump communicating with the injection hole (211), the liquid pump delivering a fluid to the accommodation chamber (210).
2. The underground engineering waterproof curtain leakage detection device according to claim 1, characterized in that: the lifting mechanism comprises a lifting rope connected to the top of the container (200) and a winch that winds the lifting rope.
3. The underground engineering waterproof curtain leakage detection device according to claim 2, characterized in that: the communicating 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 testing hole (220), and an annular liquid flow channel (330) is defined between 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).
4. The underground engineering waterproof curtain leakage detection device according to claim 3, characterized in that: 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).
5. A method for detecting seepage of a waterproof curtain of an underground project is characterized by comprising the following steps: the underground engineering waterproof curtain leakage detection device as claimed in any one of claims 1 to 4, comprising the following steps:
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), putting 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 gravel;
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 one adjacent through hole (110);
s4, the liquid pump conveys water-based fluorescent tracer aqueous solution to the containing chamber (210);
s5, turning on an ultraviolet lamp to irradiate the water in the observation well (420), and observing whether the observation well (420) generates a fluorescence reaction;
s6, when the water in the observation well (420) has a fluorescence reaction, completing the underground engineering waterproof curtain leakage detection method; when the water in the observation well (420) does not react fluorescently, the steps S3 to S6 are repeated until the container (200) moves to the top end of the pipeline (100).
6. The underground engineering waterproof curtain leakage detection method according to claim 5, characterized in that: before the step S4, a water pressure sensor is placed in the water in the observation well (420), the water pressure sensor is used to measure the water pressure value of the observation well (420), 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 10 kpa.
7. The underground engineering waterproof curtain leakage detection method according to claim 6, characterized in that: in the step S4, the liquid pump delivers the water-based fluorescent tracer aqueous solution to the receiving chamber (210) for a time period between 5 minutes and 10 minutes.
8. The underground engineering waterproof curtain leakage detection method according to claim 7, characterized in that: during the duration, water is extracted from the observation well (420) such that the water level of the observation well (420) is flush with the test well (220).
9. The underground engineering waterproof curtain leakage detection method according to claim 5, characterized in that: in the step S1, the inspection well (410) and the observation well (420) are symmetrically arranged with the waterproof curtain (400) as a center line.
10. The underground engineering waterproof curtain leakage detection method according to claim 5, characterized in that: the underground engineering waterproof curtain leakage detection method further comprises the following steps: and (2) carrying out fluorescence capture on the observation well (420) by arranging a fluorescence camera to obtain a target image, and judging whether the waterproof curtain (400) has a leakage condition or not according to the target image.
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