Real-time online detection method and device for underwater concrete pouring compactness

Abstract

The invention discloses a real-time online detection method and device for underwater concrete pouring compactness, and the device comprises a polyhedral direction clamping sleeve, the side surface of the polyhedral direction clamping sleeve is spliced and assembled with a compactness detection probe, and the compactness detection probe is connected with an underwater concrete compactness data acquisition module through a transmission line; the underwater concrete compactness data acquisition module is connected with a data management terminal through a connecting line; the compactness detection probe comprises a first waterproof shell, a stepped cavity which is gradually shrunk and diminished is arranged in the compactness detection probe, and correlation type photoelectric sensors are arranged on the two sides of the cavity. A compactness detection probe and a matched device are arranged in the underwater concrete pouring process, real-time monitoring of the filling compactness effect and online prediction of the pouring progress in the pouring process are achieved, the equipment device is easy and convenient to arrange, detection data are displayed in real time, online early warning pushing is achieved, accurate monitoring and timely feedback of the engineering construction condition are achieved, and the construction efficiency is improved. And the engineering construction quality can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of underwater concrete pouring detection, and in particular to a real-time online detection method and device for underwater concrete pouring density. Background Art

[0002] Underwater concrete is a special concrete material that is poured and hardened in an underwater environment. Its development and application stem from the needs of underwater engineering construction and repair, such as offshore platform construction, underwater tunnel plugging, structure foundation concrete backfilling, water-damaged foundation rescue and repair, etc. These engineering structures are in an underwater environment all year round, requiring concrete to have good durability, impermeability and compressive strength.

[0003] The compactness of underwater concrete is one of the key factors that determine its performance. The quality of the compactness directly affects the strength, impermeability and durability of concrete. In underwater environments, concrete is subject to the effects of multiple complex forces such as water pressure, water flow, and waves. If the concrete is not poured densely, defects such as cavities and cracks are likely to appear inside the concrete, which will lead to reduced structural strength and impermeability, and even cause serious problems such as structural instability and leakage.

[0004] At present, the commonly used detection methods for the compactness of underwater concrete pouring mainly include the following: (1) ultrasonic detection method; (2) core sampling method; (3) resistivity method, etc. The problems of the existing methods are:

[0005] (1) Testing can only be carried out after underwater concrete pouring is completed. The test results have a long lag and cannot provide real-time feedback to guide on-site construction work and find out the gaps. Post-construction repair work is difficult and expensive and will delay the construction period.

[0006] (2) Ultrasonic testing, resistivity testing, etc. are indirect testing methods that can obtain overall test results, but it is difficult to accurately reflect local defects; core sampling can directly reflect local casting density and defects, but it is expensive and belongs to destructive testing.

[0007] (3) Currently, there is a lack of real-time online detection methods and devices for underwater concrete pouring density, which can provide real-time feedback on pouring density and pouring progress, guide on-site construction operations, and ensure the construction quality and reliability of the underwater pouring process.

[0008] In the available literature, many people have proposed methods for monitoring the performance and pouring process of underwater concrete, such as:

[0009] Patent ZL202021347678.4 “An underwater concrete pouring quality detection device” provides a monitoring device that can quickly and accurately monitor the vertical collapse performance of underwater concrete, but it cannot solve the aforementioned problems;

[0010] Patent ZL202110585905.X "A device and method for underwater concrete elevation measurement" proposes a device and method for detecting airbag pressure to reflect the underwater concrete pouring height. The problem is that the device structure is relatively complex and the cost is high; similar to it are patent ZL202322483562.3 "A digital monitoring system for underwater concrete elevation monitoring of pile foundations" and patent ZL201520229335.0 "A device for detecting concrete pouring position using differential pressure sensor".

[0011] Patent 202021740696.9 "An underwater concrete liquid level monitor" uses a liquid level sensor combined with a vertical riser to detect the concrete liquid level. On the one hand, it cannot reflect the compactness of concrete pouring, and on the other hand, it cannot meet the needs of real-time online detection; similar to it are patents ZL201520420889.9 "A device for automatically monitoring the underwater concrete pouring elevation" and so on.

[0012] Patent ZL201810223382.2 "A real-time monitoring device for underwater concrete pouring height and its use method" uses a floating ball and a graduated traction pin to achieve real-time monitoring of the pouring height, but it cannot reflect the compactness of the concrete inside. Summary of the invention

[0013] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a real-time online detection method and device for underwater concrete pouring density, so as to solve the problem of real-time online detection of underwater concrete pouring density, give its pouring status and pouring density at a specific point, provide real-time feedback to guide the construction pouring process of underwater concrete, improve construction quality, and increase structural stability and reliability.

[0014] The present invention also provides a real-time online detection device for underwater concrete pouring density, comprising: a polyhedral directional ferrule, the side surface of which is spliced ​​and assembled with a density detection probe, the density detection probe is connected to an underwater concrete density data acquisition module via a transmission line, and the underwater concrete density data acquisition module is connected to a data management terminal via a connecting line;

[0015] The compactness detection probe includes a first waterproof shell, a built-in stepped cavity that gradually shrinks, and two sides of the cavity are provided with opposing beam type photoelectric sensors. The interior of the compactness detection probe is filled with a first waterproof gel, and a waterproof connector is fixedly connected to the lower surface of the first waterproof gel. The transmission end of the opposing beam type photoelectric sensor is fixedly connected to a data cable.

[0016] According to a real-time online detection device for underwater concrete pouring density provided by the present invention, the polyhedral directional ferrule is configured as a hexahedron to test the filling capacity of underwater concrete in six main directions.

[0017] According to a real-time online detection device for underwater concrete pouring density provided by the present invention, the surface of the first waterproof shell is coated with a waterproof and corrosion-resistant coating, and the data cable is located inside the waterproof connector.

[0018] According to a real-time online detection device for underwater concrete pouring density provided by the present invention, the underwater concrete density data acquisition module includes a second waterproof shell, a first microprocessor and a digital-to-analog converter are arranged inside the second waterproof shell, the interior of the second waterproof shell is filled with a second waterproof gel, and the digital-to-analog converter is connected to the density detection probe through a splitter.

[0019] According to a real-time online detection device for underwater concrete pouring density provided by the present invention, the data management terminal includes a third waterproof shell, the interior of the third waterproof shell is provided with a second microprocessor, a wireless signal transceiver, a battery, and a storage module, and the surface of the third waterproof shell is fixedly connected to a display screen.

[0020] According to a real-time online detection device for underwater concrete pouring density provided by the present invention, the aperture of the outermost layer of the cavity should be greater than 1.5 to 2.0 times the maximum aggregate particle size of the underwater concrete, the ratio of the apertures of adjacent layers is between 1.5 and 3.0, and the minimum size of the aperture is greater than 5 mm, as shown below:

[0021]

[0022] D1 is the outermost aperture of the cavity, Max Coarse aggregate is the largest aggregate particle, the D i is the aperture of the i-th layer, the D i+1 is the aperture of the next layer of the i-th layer, and the D i / D i+1 is the ratio of the apertures of adjacent levels, the D n is the smallest cavity aperture.

[0023] A real-time online detection method for underwater concrete pouring density, using the above-mentioned device, the real-time online detection method specifically comprises the following steps:

[0024] S1. According to the site requirements, the compactness detection probes are deployed to the designated representative points, fixed and recorded in position, direction and photos, and then the sensor data are collected in real time;

[0025] S2. The data management terminal receives data from all through-beam photoelectric sensors in real time. When the value of a through-beam photoelectric sensor at a certain location exceeds a threshold, a calculation is triggered to determine the filling level of the compactness detection probe where the sensor is located.

[0026] S3. After the calculation is completed, the detection status and information of all detection points are updated, the current pouring progress and pouring quality are analyzed, and the monitoring information is pushed to the data management terminal or the mobile terminal of relevant personnel in real time;

[0027] S4. After pouring is completed, the pouring process and compactness are evaluated holistically based on the test results and monitoring history of all compactness detection probes.

[0028] According to a real-time online detection method for underwater concrete pouring density provided by the present invention, the layout positions of the density detection probes in S1 can be divided into two categories: one is the spatial position feature points, which are mainly used for pouring progress feedback; the other is the parts that are not easy to fill densely, which are mainly used to evaluate the filling density and filling capacity of underwater concrete in these parts. The layout directions of the density detection probes 1 are mainly in the direction of the water flow and in the direction against the water flow.

[0029] Beneficial Effects

[0030] The present invention realizes real-time monitoring of the filling density effect and online prediction of the pouring progress during the pouring process by arranging a density detection probe and supporting devices during the underwater concrete pouring process. The equipment is simple and convenient to arrange, and the detection data is displayed in real time and online early warning is pushed, so that the engineering construction situation can be accurately monitored and timely fed back, which is beneficial to improving the quality of engineering construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0032] Figure 1 It is a structural diagram of a density detection probe of a real-time online detection device for underwater concrete pouring density of the present invention;

[0033] Figure 2 A polyhedral directional sleeve structure diagram of a density detection probe of a real-time online detection device for underwater concrete pouring density of the present invention;

[0034] Figure 3 It is a frame structure diagram of the real-time online detection device for underwater concrete pouring density of the present invention;

[0035] Figure 4 The figure is a schematic diagram of the installation layout of the real-time online detection device for underwater concrete pouring density of the present invention.

[0036] Legend:

[0037] 1. Compactness detection probe; 2. Polyhedral directional ferrule; 3. Underwater concrete compactness data acquisition module; 4. Connecting wire; 5. Data management terminal;

[0038] 11. first waterproof housing; 12. through-beam photoelectric sensor; 13. first waterproof gel; 14. waterproof connector; 15. data cable;

[0039] 31. second waterproof housing; 32. second waterproof gel; 33. first microprocessor; 34. digital-to-analog converter; 35. splitter;

[0040] 51. A third waterproof housing; 52. A display screen; 53. A second microprocessor; 54. A wireless signal transceiver; 55. A battery; 56. A storage module. DETAILED DESCRIPTION

[0041] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0042] Reference Figure 1-4 The embodiment of the present invention is a real-time online detection device for underwater concrete pouring density, which includes: a polyhedron directional ferrule 2, a side surface of the polyhedron directional ferrule 2 is spliced ​​and assembled with a density detection probe 1, the density detection probe 1 is connected to an underwater concrete density data acquisition module 3 through a transmission line, and the underwater concrete density data acquisition module 3 is connected to a data management terminal 5 through a connecting line 4;

[0043] The compactness detection probe 1 includes a first waterproof shell 11. The compactness detection probe 1 has a built-in stepped cavity that gradually shrinks. Opposing photoelectric sensors 12 are arranged on both sides of the cavity. The aperture D1 of the outermost cavity should be larger than 1.5 to 2.0 times the maximum aggregate particle size of the underwater concrete. Its function is to monitor whether the compactness detection probe 1 is covered by the underwater concrete. The aperture Dn of the second to nth level cavities on the inside should be set according to the concrete working performance and indoor test results. Its function is to evaluate the filling capacity of concrete here. The more filling levels, the narrower the filling aperture Dn, indicating that its filling capacity is better, which reflects the filling density of the concrete here. The ratio of the apertures of adjacent levels Di:Di+1 should be between 1.5 and 3.0, and the minimum aperture Dn should not be less than 5mm. It should ensure that the fine aggregate of the concrete can be filled normally and the opposing photoelectric sensor 12 can work normally. In summary, the built-in cavity aperture of the compactness detection probe 1 should meet the following requirements:

[0044]

[0045] The interior of the compactness detection probe 1 is filled with a first waterproof gel 13 , a waterproof connector 14 is fixedly connected to the lower surface of the first waterproof gel 13 , and a data line 15 is fixedly connected to the transmission end of the through-beam photoelectric sensor 12 .

[0046] The polyhedral direction ferrule 2 is set as a hexahedron to test the filling capacity of underwater concrete in six main directions.

[0047] The surface of the first waterproof housing 11 is coated with a waterproof and corrosion-resistant coating, and the data cable 15 is located inside the waterproof connector 14 .

[0048] The underwater concrete compactness data acquisition module 3 includes a second waterproof shell 31, inside of which a first microprocessor 33 and a digital-to-analog converter 34 are arranged, and inside of the second waterproof shell 31 is filled with a second waterproof gel 32, and the digital-to-analog converter 34 is connected to the compactness detection probe 1 via a splitter 35.

[0049] The data management terminal 5 comprises a third waterproof shell 51 , inside of which are disposed a second microprocessor 53 , a wireless signal transceiver 54 , a battery 55 , and a storage module 56 . A display screen 52 is fixedly connected to the surface of the third waterproof shell 51 .

[0050] The real-time online detection method for underwater concrete pouring density of this embodiment adopts the above-mentioned device, and the real-time online detection method specifically includes the following steps:

[0051] S1. According to the site requirements, the compactness detection probe 1 is deployed to the designated representative point, fixed and recorded its position, direction and photos, and then starts to collect sensor data in real time;

[0052] S2. The data management terminal 5 receives data from all the beam-type photoelectric sensors 12 in real time. When the value of a beam-type photoelectric sensor 12 exceeds the threshold, the calculation is triggered to determine the filling level of the compactness detection probe 1;

[0053] S3. After the calculation is completed, update the detection status and information of all detection points, analyze the current pouring progress and pouring quality, and push the monitoring information to the data management terminal 5 or the mobile terminal of relevant personnel in real time;

[0054] S4. After pouring is completed, the pouring process and compactness are evaluated holistically based on the test results and monitoring history of all compactness detection probes 1.

[0055] The layout positions of the compactness detection probes 1 in S1 can be divided into two categories: one is the spatial position feature points, which are mainly used for pouring progress feedback; the other is the parts that are difficult to fill densely, which are mainly used to evaluate the filling density and filling capacity of underwater concrete in this part. The layout directions of the compactness detection probes 1 are mainly along the water flow direction and against the water flow direction.

[0056] Step S2 is further characterized in that: the reading of the i-th data acquisition module 3, the j-th compactness detection probe 1, the n-th level, and the k-th through-beam photoelectric sensor 12 is R i-j-n-k , when its reading exceeds its threshold R i-j-n-k >R0, it is determined that the pair of photoelectric sensors is blocked by underwater concrete;

[0057] In the above method, step S2 is further characterized in that when the i-th data acquisition module 3, the j-th density detection probe 1, and all the photoelectric sensors of the 1st to n-th levels are blocked, it is determined that the filling level of the density detection probe 1 is F n i-j = n; the fluidity or filling index T of underwater concrete can be determined by indoor tests and the filling level F of the compactness detection probe 1. n A quantitative relationship is established based on which the filling density of underwater concrete in terms of placement position and direction can be evaluated:

[0058] As described above, step S3 is further characterized in that: based on the three-dimensional terrain and the position, direction and filling level of each density detection probe 1, the current two-dimensional or three-dimensional pouring progress and pouring density evaluation results can be interpolated and drawn; the pouring surface or pouring line is drawn according to the above algorithm. If the density detection probe 1 is located below the pouring surface and the filling level is less than the design value, it means that the point does not meet the specified filling density requirements, and a timely alarm push is required to notify the site to take remedial measures at this point.

[0059] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A real-time online detection device for underwater concrete pouring density, characterized in that: include: A polyhedral directional ferrule (2), wherein a compactness detection probe (1) is spliced ​​and assembled on the side surface of the polyhedral directional ferrule (2), wherein the compactness detection probe (1) is connected to an underwater concrete compactness data acquisition module (3) via a transmission line, and the underwater concrete compactness data acquisition module (3) is connected to a data management terminal (5) via a connecting line (4); The compactness detection probe (1) comprises a first waterproof shell (11), the compactness detection probe (1) has a stepped cavity which gradually shrinks, and two sides of the cavity are provided with a through-beam photoelectric sensor (12). The compactness detection probe (1) is filled with a first waterproof gel (13), the lower surface of the first waterproof gel (13) is fixedly connected to a waterproof connector (14), and the transmission end of the through-beam photoelectric sensor (12) is fixedly connected to a data line (15).

2. A real-time online detection device for underwater concrete pouring density according to claim 1, characterized in that: The polyhedral directional ferrule (2) is arranged as a hexahedron to test the filling capacity of underwater concrete in six main directions.

3. The real-time online detection device for underwater concrete pouring density according to claim 1, characterized in that: The surface of the first waterproof housing (11) is coated with a waterproof and corrosion-resistant coating, and the data cable (15) is located inside the waterproof connector (14).

4. The real-time online detection device for underwater concrete pouring density according to claim 1, characterized in that: The underwater concrete compactness data acquisition module (3) comprises a second waterproof shell (31), a first microprocessor (33) and a digital-to-analog converter (34) are arranged inside the second waterproof shell (31), the interior of the second waterproof shell (31) is filled with a second waterproof gel (32), and the digital-to-analog converter (34) is connected to the compactness detection probe (1) via a splitter (35).

5. The real-time online detection device for underwater concrete pouring density according to claim 1, characterized in that: The data management terminal (5) comprises a third waterproof housing (51), wherein a second microprocessor (53), a wireless signal transceiver (54), a battery (55), and a storage module (56) are arranged inside the third waterproof housing (51), and a display screen (52) is fixedly connected to the surface of the third waterproof housing (51).

6. The real-time online detection device for underwater concrete pouring density according to claim 1, characterized in that: The pore size of the outermost layer of the cavity should be 1.5 to 2.0 times larger than the maximum aggregate particle size of the underwater concrete, the ratio of the pore size of adjacent layers is between 1.5 and 3.0, and the minimum size of the pore size is greater than 5 mm, as shown below: D1 is the outermost aperture of the cavity, Max Coarse aggregate is the largest aggregate particle, the D i is the aperture of the i-th layer, the D i+1 is the aperture of the next layer of the i-th layer, and the D i / D i+1 is the ratio of the apertures of adjacent levels, the D n is the smallest cavity aperture.

7. A real-time online detection method for underwater concrete pouring density, characterized in that: Using the device as described in claims 1-6, the real-time online detection method specifically includes the following steps: S1. According to the site requirements, the compactness detection probe (1) is deployed to the designated representative points, fixed and recorded its position, direction and photos, and then the real-time sensor data collection is started; S2. The data management terminal (5) receives data from all the beam-type photoelectric sensors (12) in real time. When the value of a beam-type photoelectric sensor (12) exceeds the threshold, the calculation is triggered to determine the filling level of the compactness detection probe (1); S3. After the calculation is completed, the detection status and information of all detection points are updated, the current pouring progress and pouring quality are analyzed, and the monitoring information is pushed to the data management terminal (5) or the mobile terminal of relevant personnel in real time; S4. After pouring is completed, the pouring process and compactness are evaluated holistically based on the test results and monitoring history of all compactness detection probes (1).

8. A real-time online detection method for underwater concrete pouring density according to claim 7, characterized in that: The locations of the compactness detection probes (1) in S1 can be divided into two categories: one is the spatial position feature points, which are mainly used for pouring progress feedback; the other is the parts that are difficult to fill densely, which are mainly used to evaluate the filling density and filling capacity of underwater concrete in these parts. The layout directions of the compactness detection probes (1) are mainly in the direction of the water flow and in the direction against the water flow.

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